阅读说明：本技术 全自动感应分压器检定系统及检定方法 (Full-automatic inductive voltage divider calibration system and calibration method ) 是由 闫宪峰 赵屹涛 弓建军 赵嘉瑞 李青 张永平 赵昕 于 2020-12-07 设计创作，主要内容包括：本发明全自动感应分压器检定系统及检定方法,属于互感器检测技术领域,主要解决传统感应分压器操作繁琐、工作量庞大、工作效率低的问题；包括全自动感应分压器总成、综合机柜和计算机,其特点是：所述全自动感应分压器总成包括可自校多盘感应分压器、继电器电路模块及全自动感应分压器面板；所述全自动感应分压器面板包括触摸屏和CPU控制电路；所述触摸屏通过数据线与所述CPU控制电路连接,所述计算机通过数据线与所述CPU控制电路连接,所述CPU控制电路通过数据分别与所述电机控制模块及继电器电路模块连接；所述综合机柜包括升压器、调压器、电机控制模块和校验仪；所述继电器电路模块与可自校多盘感应分压器的分压器绕组抽头相连。(The invention discloses a full-automatic sensing voltage divider calibrating system and a calibrating method, belongs to the technical field of mutual inductor detection, and mainly solves the problems of complex operation, huge workload and low working efficiency of a traditional sensing voltage divider; the full-automatic inductive voltage divider comprises a full-automatic inductive voltage divider assembly, a comprehensive cabinet and a computer, and is characterized in that: the full-automatic inductive voltage divider assembly comprises a self-correcting multi-disk inductive voltage divider, a relay circuit module and a full-automatic inductive voltage divider panel; the full-automatic induction voltage divider panel comprises a touch screen and a CPU control circuit; the touch screen is connected with the CPU control circuit through a data line, the computer is connected with the CPU control circuit through a data line, and the CPU control circuit is respectively connected with the motor control module and the relay circuit module through data; the comprehensive cabinet comprises a booster, a voltage regulator, a motor control module and a calibrator; the relay circuit module is connected with a voltage divider winding tap of the self-correcting multi-disk induction voltage divider.)

1. Full auto-induction voltage divider examination system, including full auto-induction voltage divider assembly (2), synthesize rack (1) and computer (3), characterized by: the full-automatic induction voltage divider assembly (2) comprises a self-correcting multi-disc induction voltage divider (2-1), a relay circuit module (2-2) and a full-automatic induction voltage divider panel (2-3);

the full-automatic induction voltage divider panel (2-3) comprises a touch screen (2-3a) and a CPU control circuit (2-3 b); the touch screen (2-3a) is connected with the CPU control circuit (2-3b) through a data line, the computer (3) is connected with the CPU control circuit (2-3b) through a data line, and the CPU control circuit (2-3b) is respectively connected with the motor control module (1-3) and the relay circuit module (2-2) through data;

the comprehensive cabinet (1) comprises a booster (1-1), a voltage regulator (1-2), a motor control module (1-3) and a calibrator (1-4);

the calibrator (1-4) is connected with a motor control module (1-3) through a control circuit, the motor control module (1-3) is connected with a motor control end on the voltage regulator (1-2) through a control circuit, and an output end of the voltage regulator (1-2) is connected with an input end of the booster (1-1); the booster (1-1) supplies power to the self-correcting multi-disk inductive voltage divider (2-1), and the computer (3) sends an action instruction to the relay circuit module (2-2) through a control line; after receiving an action instruction, the relay circuit module (2-2) changes a transformation ratio combination on the self-correcting multi-disk inductive voltage divider (2-1), the self-correcting multi-disk inductive voltage divider (2-1) outputs an electric signal to the calibrator (1-4), a calibration result of the calibrator (1-4) is transmitted to the computer (3) through a signal line, and the computer (3) respectively sends the action instruction to the calibrator (1-4) and the motor control module (1-3) through a control line;

the self-correcting disc inductive voltage divider (2-1) comprises a first voltage divider (2-1a), a second voltage divider (2-1b) and a third voltage divider (2-1 c); each disk in the first voltage division piece and the second voltage division piece is composed of a main voltage divider and an auxiliary voltage divider, the number of turns of windings of the main voltage divider and the auxiliary voltage divider is completely equal, and the number of turns of each disk is 1/10 of the number of turns of the previous disk; only a main voltage divider is arranged in the third voltage divider; the winding of the main voltage divider or the auxiliary voltage divider of each disk is equally divided into eleven taps, different taps are selected through the drive plate to obtain corresponding voltages, the output voltage of each disk is superposed on the next disk through a lead, and finally the output voltage formed by combining eight disks can be obtained;

the power supply winding (2-1a0) is externally connected with a booster and the winding a₀～a₁₀The inductive voltage divider is connected with the input end of the power supply, and the working voltage is input into the inductive voltage divider;

the first voltage division part (2-1a) is of a two-stage structure, wherein a1 st-stage iron core I (2-1a9) and a proportional winding a wound on the iron core I₀～a₁₀、b₀～b₁₀And c₀～c₁₀Forming discs 1 to 3 of the auxiliary voltage divider; the first disk sub-bleeder (2-1a4) is provided with eleven taps, i.e. a₀～a₁₀(ii) a The second disk sub-bleeder (2-1a5) is provided with eleven taps, i.e. b₀～b₁₀(ii) a The third disk subsidiary divider (2-1a6) is provided with eleven taps, i.e. c₀～c₁₀(ii) a The 1 st iron core I is also provided with a connection winding d₀d₁₀(2-1a8) with the number of turns equal to c₀c₁D connected to an auxiliary voltage divider in the second voltage divider (2-1b)₀～d₁₀A winding;

the 2 nd-stage iron core II (2-1a10) in the first voltage division piece is used as a magnetic shielding iron core at the same time, and a proportional winding A wound on the iron core I and the iron core II₀～A₁₀、B₀～B₁₀And C₀～C₁₀1 st to 3 rd disks forming a main voltage divider; the first disk main voltage divider (2-1a1) is provided with ten taps, A₀～A₁₀(ii) a The second main disk voltage divider (2-1a2) is provided with eleven taps, namely B₀～B₁₀(ii) a The third main voltage divider (2-1a3) is provided with eleven taps, i.e. C₀～C₁₀(ii) a The 2 nd-stage iron core II is also provided with a connection winding D₀D₁₀(2-1a7) with the number of turns equal to C₀C₁D connected to the main voltage divider in the second voltage divider (2-1b)₀～D₁₀A winding;

the 1 st disc of the auxiliary voltage divider is simultaneously used as an excitation winding of input voltage; secondary windings ax and a on core I₀x₀Winding for supplying power to the checking instrument, ax number of turns of winding and b₀b₁₀Is equal to a₀x₀C and c₀c₁₀Equal;

the second voltage division piece (2-1b) is still of a two-stage structure, and a1 st stage iron core III (2-1b8) and a proportional winding d wound on the iron core III₀～d₁₀、e₀～e₁₀And f₀～f₁₀Fourth to sixth disks constituting the auxiliary voltage divider; the fourth disk sub-bleeder (2-1b4) is provided with eleven taps, i.e. d₀～d₁₀(ii) a The fifth disk sub-bleeder (2-1b5) is provided with eleven taps, i.e. e₀～e₁₀(ii) a The sixth disk subsidiary divider (2-1b6) is provided with eleven taps, i.e. f₀～f₁₀；

Proportional winding D on the 2 nd-stage iron core IV (2-1b9) in the second voltage division part₀～D₁₀、E₀～E₁₀And F₀～F₁₀The fourth disk to the sixth disk which form the main voltage divider; the fourth main voltage divider (2-1b1) is provided with eleven taps D₀～D₁₀The fifth main voltage divider (2-1b2) is provided with eleven taps E₀～E₁₀The sixth main voltage divider (2-1b3) is provided with a tap F₀～F₁₀(ii) a The 2 nd-stage core IV also has a connection winding G₀G₁₀(2-1b7) with a number of turns equal to F₀F₁Connected to the G of the main voltage divider in the third voltage divider (2-1c)₀～G₁₀A winding;

the third voltage division piece (2-1c) is a general single-stage structure, and comprises a core V (2-1c3) and a proportional winding G wound on the core V₀～G₁₀And H₀～H₁₀The seventh disk and the eighth disk of the main voltage divider are formed; the seventh disk voltage divider (2-1c1) is provided with eleven taps G₀～G₁₀(ii) a The eighth disk voltage divider (2-1c2) is provided with eleven taps H₀～H₁₀(ii) a Eighth disk divider terminal N₀Is connected with the ground;

the main voltage divider is eight disks, while the auxiliary voltage divider only has six disks, so that only six-disk self-calibration can be carried out; the error of the sixth disc is less than 2 x10^-8The errors of the seventh and eighth discs are smaller and can be ignored;

based on the structure, the relay circuit module (2-2) comprises nine relay circuit boards, wherein eight circuit boards are connected with one-eight-disk main voltage divider winding taps and one-six-disk auxiliary voltage divider winding taps of the self-correcting multi-disk induction voltage divider (2-1), and a common line is connected with a K wiring terminal on the full-automatic induction voltage divider panel (2-3); the last relay circuit board is used for inputting the working voltage of the induction voltage divider, 10 relays are used, the voltage is sequentially 100-1000V, and two common lines of the relay circuit board can be selected according to actual conditions and are respectively connected with the panel A, A0, namely the main voltage divider is connected with A0, and the auxiliary voltage divider is connected with A;

in order to realize the automatic control function of the traditional drive plate of the inductive voltage divider, two types of relays I and II are used, wherein the relay I is a double-pole single-throw relay; the type II relay is a single-pole single-throw relay;

each pair of main and auxiliary voltage divider taps a0A0, a1A1, a2A2, A3A3 … … a9A9 and a10A10 are respectively connected with two switch interfaces of an I-type relay, so that the on-off control is realized at the same time; then, the taps A1, A1 and A2 … … A10 of each main voltage divider are respectively connected with a II-type relay to realize independent on-off control; the 'a' is the total output end of the first disk auxiliary voltage divider, and the 'A' is the total output end of the first disk main voltage divider; "K1" is first dish differential pressure return circuit input for the work of autoverification, and different K ends can be used to the dish of autoverification difference, and the K end is differential pressure return circuit input, totally 6, 1 ~ 6 dish respectively one, is K1 ~ K6 respectively for the work of autoverification, different dishes can use different K ends when autoverification, if: when the second plate is calibrated by self, the relay corresponding to K2 is switched on; for the seventh and eighth disks, only the main voltage divider structure is needed, and only 0-10 taps of the main voltage divider are respectively connected with the II-type relay; the corresponding I-type and II-type relays are switched on and off according to gears required by each plate, so that the same function as that of a driving plate can be realized by controlling the on and off of the relays;

the connection mode of the relay circuit is explained by taking a first disc as an example:

the I type double-pole single-throw relay comprises a No. 1 double-pole single-throw relay (2-21), a No. 2 double-pole single-throw relay (2-22), a No. 3 double-pole single-throw relay (2-24), a No. 4 double-pole single-throw relay (2-26), a No. 5 double-pole single-throw relay (2-28), a No. 6 double-pole single-throw relay (2-210), a No. 7 double-pole single-throw relay (2-212), a No. 8 double-pole single-throw relay (2-214), a No. 9 double-pole single-throw relay (2-216), a No. 10 double-pole single-throw relay (2-218) and a No. 11 double-pole single-throw relay (2-220), wherein one fixed contact of the No. 1 double-pole single-throw relay is connected with an;

the relay comprises a type II single-pole single-throw relay, a fixed contact of a No. 1 single-pole single-throw relay (2-23), a No. 2 single-pole single-throw relay (2-25), a No. 3 single-pole single-throw relay (2-27), a No. 4 single-pole single-throw relay (2-29), a No. 5 single-pole single-throw relay (2-211), a No. 6 single-pole single-throw relay (2-213), a No. 7 single-pole single-throw relay (2-215), a No. 8 single-pole single-throw relay (2-217), a No. 9 single-pole single-throw relay (2-219) and a No. 10 single-pole single-throw relay (2-221) and a K1 terminal;

the circuit connection mode of other relays is the same as above;

the touch screen (2-3a) is divided into four key areas, which are respectively: a voltage input selection area (2-3a1) with ten keys for selecting 100V-1000V input voltage; the input end selection area (2-3a2) of the differential pressure loop has six keys, and K1-K6 are correspondingly selected according to a calibrated disc during self-calibration; a disk selection area (2-3a3) with eight keys for selecting the current 1-8 disks to be operated; a numerical keyboard area (2-3a4) for setting the voltage steps required by the selected disk by inputting numbers;

the control signal can be input by a computer (3) or a touch screen (2-3a) and is transmitted to a CPU control circuit (2-3b) to control the on-off of a corresponding relay in the relay circuit module (2-2); the CPU control circuit (2-3b) provides a control signal for the motor control module (1-3), and the control voltage regulator (1-2) provides working voltage for the self-correcting multi-disk inductive voltage divider (2-1); the self-correcting multi-disk inductive voltage divider (2-1) is connected with a calibrator (1-4), and the calibrator (1-4) is controlled by the computer (3) and simultaneously transmits test data back to the computer (3) for processing and generating a final result;

the computer (3) comprises an equipment control module and a data operation module, wherein the equipment control module is used for inputting measurement parameters, transmitting measurement data and controlling the operation of each equipment in the comprehensive cabinet; the data operation module is used for calculating, screening, displaying and storing the measured data.

2. The self-calibration and mutual-calibration method of the full-automatic inductive voltage divider calibration system is characterized by comprising the following steps: the method comprises the following steps:

(1) electrifying the calibrating device

Before power-on, firstly checking that the test wiring is correct, and connecting the RS232 interfaces of the full-automatic inductive voltage divider, the voltage regulator and the calibrator with the computer, wherein the inductive voltage divider and the voltage regulator share one RS232 interface;

starting a key master switch on a panel, if the carbon brush of the pressure regulator is not at the zero position at the moment, automatically descending to the zero position in advance, and then in the process of descending to the zero position, temporarily disabling a starting key;

after the carbon brush of the voltage regulator is reduced to the zero position, two sound prompt tones can be emitted to complete the electrification;

the touch screen realizes the operations of voltage selection, disk number selection, gear selection and the like through key input; the keys 100V-1000V are selected for input of the inductive voltage divider, so that the input can be carried out from 10 bits, namely 1000V, and can also be carried out from 9-1 bits, namely 900-100V, so that the boosted inductive voltage divider is obtained; the accuracy of the inductive voltage divider is that when the input voltage is input at 10 bits and input at 9-1 bits, the accuracy of the inductive voltage divider is reduced, and particularly the error is larger during boosting; keys K1-K6 are switched from 1 to 6 disks during self-calibration, and keys X100V-X0.01mV are input in 1 to 8 disk gear positions;

a0 and A on the panel (2-3) of the full-automatic induction voltage divider are connected with the output of the voltage regulator, 100V (a), 10V (a', x) of output voltage are connected with the end of the check meter A, X, K, D is connected with the end of the check meter K, D, N0 is connected with D, and two N end buttons are completely the same, so that the convenience of grounding nearby is realized;

(2) self-correcting process

Firstly, parameter setting is carried out through a touch screen (2-3a), then a K key of a corresponding disc is selected, if self-calibration is carried out on a first disc, the K1 key is pressed, the gear position of a second disc is set to be 10, a 100V dial indicator is selected by a calibrator (1-4), and the precision is 0.001; setting the gears of the first disc to be 0-9 gears in sequence, and obtaining self-checking data of 10 gears of the first disc;

when self-calibration is carried out under the input voltage of 1000V-400V, 1200V is selected as the output gear of the booster; when self-calibration is carried out under the input voltage of 300V-100V, the output gear of the booster should be 400V; in the self-calibration process, the motor can control the lifting through a cabinet machine button lifting key, and can also control the lifting through a serial port by using an equipment control module in a computer;

when a computer is used for measurement, parameters such as test date, a dial plate, test voltage and the like are selected in a program interface in a computer data operation module, a full-automatic self-correction key is clicked, self-correction is started, after error data test is completed under 20% -120% rated voltage of 10 gears of each disk, data storage is clicked, and then the next disk is selected for continuous measurement;

(3) mutual calibration process

The primary winding (4) of the tested induction voltage divider is connected with a power supply end, and the secondary winding (5) of the tested induction voltage divider is connected with the terminals a and x of the check meter (1-4); correspondingly setting on the touch screen according to the measured proportional relation, if the measured voltage is 500/50 voltage transformer, setting the inductive voltage divider as 1000V/100V for measurement according to the proportional relation, wherein the inductive voltage divider inputs 1000V, and the second panel, namely the X10V key, selects 10 steps, so that mutual calibration can be performed on the 500/50 voltage transformer; theoretically, the eight disc gears are set, so that the tested mutual inductor with any voltage ratio can be measured;

in the mutual calibration process, the voltage regulator (1-2) can control the lifting through a cabinet button lifting key, and can also control the lifting of voltage through a serial port by using an equipment control module in a computer;

using a computer to carry out mutual calibration measurement flow consistent with the self-calibration flow of the previous step;

(4) self-correcting data processing

The computer data operation module can carry out operation processing on the measurement data transmitted by the calibrator according to the error principle of the inductive voltage divider; the measuring error of the inductive voltage divider to a certain transformation ratio is the sum of a mutual correction error and a self correction error, namely the sum of the tested error and the self error of the inductive voltage divider, and the result after the operation of the full-automatic inductive voltage divider software is the final measuring result and can be displayed in a form of a table;

when the first disk error is subjected to self-correction, corresponding input is selected according to a self-correction process, the number of disks is selected from K2, the gear of the second disk is set to be 10, switches of other disks are set to be 0, and finally 0-9 are sequentially input to the gear of the first disk, so that the 10 gears of the first disk can be subjected to self-correction; at this time, the segment voltages of the 1 st segment to the 10 th segment of the 1 st disc are respectively measuredRelative to a reference potentialError of (2)

3. The method for self-calibration and mutual calibration of a calibration system of a fully automatic inductive voltage divider according to claim 2, wherein:

the first disk A has 10 scales, and each scale is 100V; the second plate B has 10 scales, and each scale is 10V; the third plate C has 10 scales, and each scale is 1V; the fourth plate D is provided with 10 scales, and each scale is 0.1V; the fifth disk E is provided with 10 scales, and each scale is 0.01V; the sixth disk F is provided with 10 scales, and each scale is 0.001V; a seventh plate G with 10 scales, wherein each scale is 0.0001V; the eighth disk H is provided with 10 scales, and each scale is 0.0001V; as the structure and the working principle of the first disk, namely the disk A to the disk F, are the same, the scale of the original dial of the disk A is 0 to 10, and the scale corresponds to two groups of taps of a main voltage divider A0 to A10 and an auxiliary voltage divider a0 to a 10; when the dial scale 0 is selected, a0, A0 and A1 are communicated;

when the required voltage is 100V, the dial scales 1, a1, A1 and A2 are selected to be respectively communicated with the output end a of the first disk auxiliary voltage divider, the output end A of the first disk main voltage divider and the input end K1 of the first disk differential pressure loop;

when the required voltage is 200V, the dial scales 2, a2, A2 and A3 are selected to be respectively communicated with the output end a of the first disk auxiliary voltage divider, the output end A of the first disk main voltage divider and the input end K1 of the first disk differential pressure loop;

when the required voltage is 300V, the dial scales 3, A3, A3 and A4 are selected to be respectively communicated with the output end a of the first disk auxiliary voltage divider, the output end A of the first disk main voltage divider and the input end K1 of the first disk differential pressure loop;

when the required voltage is 400V, the dial scales 4, a4, A4 and A5 are selected to be respectively communicated with the output end a of the first disk auxiliary voltage divider, the output end A of the first disk main voltage divider and the input end K1 of the first disk differential pressure loop;

when the required voltage is 500V, the dial scales 5, a5, A5 and A6 are selected to be respectively communicated with the output end a of the first disk auxiliary voltage divider, the output end A of the first disk main voltage divider and the input end K1 of the first disk differential pressure loop;

when the required voltage is 600V, the dial scales 6, a6, A6 and A7 are selected to be respectively communicated with the output end a of the first disk auxiliary voltage divider, the output end A of the first disk main voltage divider and the input end K1 of the first disk differential pressure loop;

when the required voltage is 700V, the dial scales 7, a7, A7 and A8 are selected to be respectively communicated with the output end a of the first disk auxiliary voltage divider, the output end A of the first disk main voltage divider and the input end K1 of the first disk differential pressure loop;

when the required voltage is 800V, the dial scales 8, a8, A8 and A9 are selected to be respectively communicated with the output end a of the first disk auxiliary voltage divider, the output end A of the first disk main voltage divider and the input end K1 of the first disk differential pressure loop;

when the required voltage is 900V, the dial scales 9, a9, A9 and A10 are selected to be respectively communicated with the output end a of the first disk auxiliary voltage divider, the output end of the first disk main voltage divider and the input end K1 of the first disk differential pressure loop;

when the required voltage is 1000V, dial scales 10, a10 and A10 are selected to be respectively communicated with the output end a of the first disk auxiliary voltage divider, the output end A of the first disk main voltage divider and the input end K1 of a first disk differential pressure loop;

the operation can be realized through a touch screen, and the operation method comprises the following steps: sequentially clicking keys in different areas of the touch screen according to needs to complete settings such as voltage selection, self-calibration disc selection, gear selection and the like; after a key on the touch screen is clicked, the touch screen sends an operation instruction to the CPU control circuit (2-3b), and the CPU control circuit (2-3b) controls the on-off of a corresponding relay according to the instruction; the computer (3) can also send instructions to the CPU control circuit (2-3b) to realize the control function;

the operation can be realized by full-automatic inductive voltage divider software, and the operation method comprises the following steps: if self-calibration measurement is needed, clicking a full-automatic self-calibration button after software is opened; if mutual calibration measurement is needed, clicking a full-automatic measurement button after software is opened; then selecting parameters such as test date, dial, test voltage and the like in a program interface, and starting measurement by clicking a 'start measurement' key; the software can measure error data under 20% -120% of rated voltage, and after each scale measurement is finished, the software can automatically switch to the next scale to continue to measure; after the measurement of each disk is completed, the next disk can be automatically switched; after the test is finished, a data table is generated, and the measurement data can be stored by clicking a 'data storage' key.

Technical Field

The invention belongs to the technical field of mutual inductor detection, and particularly relates to a full-automatic inductive voltage divider calibration system and a full-automatic inductive voltage divider calibration method.

Background

Inductive voltage dividers were a voltage scaling standard developed in the last 50 th century. Its internal structure determines a relatively high measurement accuracy of the inductive divider, typically 10^-5～10^-6It is commonly used for precise electrical measurement.

The traditional induction voltage divider adopts a dial knob to operate, and the following problems mainly exist in the measuring process:

(1) the dial knob structure needs manual operations such as numerical selection, wiring, wire changing and the like, and the process is complicated and the equipment is easy to wear.

(2) When the inductive voltage divider is used for self-calibration or mutual calibration, the excessive voltage proportion makes many transformation ratios impossible to be calibrated one by one in actual calibration, and most of the time, only random inspection can be performed.

(3) The measurement result of the traditional inductive voltage divider needs to be manually recorded and input into a computer for calculation, so that the workload is huge and errors are easy to make.

Aiming at the above situation, in order to solve the problems of complex operation, huge workload, low working efficiency and the like in the verification process of the traditional sensing voltage divider, an automatic control sensing voltage divider measurement system is designed by building a digital control circuit on the premise of ensuring the precision requirement according to the working principle of the sensing voltage divider, so that the output, self-calibration and mutual calibration of a voltage regulator, and data acquisition and calculation are realized.

Disclosure of Invention

The invention aims to design and develop the automatic detection equipment of the inductive voltage divider, which integrates voltage detection, voltage regulator control and software operation on the basis of ensuring the original measurement precision and can realize the automatic detection of any voltage ratio of 1000V-0.01 mV under 20-120 percent of rated voltage. The invention uses the liquid crystal screen and the relay control circuit to replace the traditional dial structure, so that the wiring panel is cleaner and more beautiful, and the operation mode is more convenient and simpler. The voltage regulator, the booster, the calibrator and the load box adopt an integrated cabinet structure and can be automatically controlled by a computer.

The technical scheme adopted by the invention for solving the technical problems is as follows:

full-automatic inductive voltage divider verification system, including full-automatic inductive voltage divider assembly, synthesize rack and computer, its characteristics are: the full-automatic inductive voltage divider assembly comprises a self-correcting multi-disk inductive voltage divider, a relay circuit module and a full-automatic inductive voltage divider panel;

the full-automatic induction voltage divider panel comprises a touch screen and a CPU control circuit; the touch screen is connected with the CPU control circuit through a data line, the computer is connected with the CPU control circuit through a data line, and the CPU control circuit is respectively connected with the motor control module and the relay circuit module through data;

the comprehensive cabinet comprises a booster, a voltage regulator, a motor control module and a calibrator;

the calibration instrument is connected with the motor control module through a control circuit, the motor control module is connected with the motor control end on the voltage regulator through a control circuit, and the output end of the voltage regulator is connected with the input end of the booster; the booster supplies power to the self-correcting disk inductive voltage divider, and the computer sends an action instruction to the relay circuit module through a control circuit; after receiving an action instruction, the relay circuit module changes a transformation ratio combination on the self-correcting multi-disc inductive voltage divider, the self-correcting multi-disc inductive voltage divider outputs an electric signal to the calibrator, a calibration result of the calibrator is transmitted to the computer through a signal line, and the computer respectively sends action instructions to the calibrator and the motor control module through control circuits;

the self-correcting disk induction voltage divider comprises a first voltage divider, a second voltage divider and a third voltage divider, wherein each disk in the first voltage divider and the second voltage divider is composed of a main voltage divider and an auxiliary voltage divider, the number of turns of windings of the main voltage divider and the number of turns of the auxiliary voltage divider are completely equal, and the number of turns of each disk is 1/10 of the number of turns of the previous disk. Only a main voltage divider is arranged in the third voltage divider; the winding of the main voltage divider or the auxiliary voltage divider of each disk is equally divided into eleven taps, different taps are selected through the drive plate to obtain corresponding voltages, the output voltage of each disk is superposed on the next disk through a lead, and finally the output voltage formed by combining eight disks can be obtained;

the supply winding being externally connected to a booster and to winding a₀～a₁₀And the connecting part is used for inputting working voltage for the inductive voltage divider.

The first voltage division part is of a two-stage structure, wherein a1 st-stage iron core I and a proportional winding a wound on the iron core I₀～a₁₀、b₀～b₁₀And c₀～c₁₀Forming discs 1 to 3 of the auxiliary voltage divider; the first disk subsidiary divider is provided with eleven taps, namely a₀～a₁₀(ii) a The second disk subsidiary divider is provided with eleven taps, i.e. b₀～b₁₀(ii) a The third disk subsidiary divider is provided with eleven taps, i.e. c₀～c₁₀(ii) a The 1 st iron core I is also provided with a connection winding d₀d₁₀The number of turns is equal to c₀c₁D connected to an auxiliary voltage divider in the second voltage divider₀～d₁₀And (4) winding.

The 2 nd-stage iron core II in the first voltage division piece is simultaneously used as a magnetic shielding iron core, and a proportional winding A wound on the iron core I and the iron core II₀～A₁₀、B₀～B₁₀And C₀～C₁₀1 st to 3 rd disks forming a main voltage divider; the first disk main voltage divider is provided with ten taps A₀～A₁₀(ii) a The second main voltage divider of the disk is provided with eleven taps, i.e. B₀～B₁₀(ii) a The third main voltage divider is provided with eleven taps, i.e. C₀～C₁₀. The 2 nd-stage iron core II is also provided with a connection winding D₀D₁₀The number of turns is equal to C₀C₁D is connected with a main voltage divider in a second voltage divider₀～D₁₀A winding;

the 1 st disc of the auxiliary voltage divider is simultaneously used as an excitation winding of input voltage; secondary windings ax and a on core I₀x₀Winding for supplying power to the checking instrument, ax number of turns of winding and b₀b₁₀Is equal to a₀x₀C and c₀c₁₀Equal;

the above-mentionedThe second voltage division piece is still of a two-stage structure, namely a1 st-stage iron core III and a proportional winding d wound on the iron core III₀～d₁₀、e₀～e₁₀And f₀～f₁₀Fourth to sixth disks constituting the auxiliary voltage divider; the fourth disk subsidiary divider is provided with eleven taps, i.e. d₀～d₁₀(ii) a The fifth disk subsidiary divider is provided with eleven taps, i.e. e₀～e₁₀(ii) a The sixth disk subsidiary divider is provided with eleven taps, i.e. f₀～f₁₀；

Proportional winding D on 2 nd-stage iron core IV in second voltage division part₀～D₁₀、E₀～E₁₀And F₀～F₁₀The fourth disk to the sixth disk which form the main voltage divider; the fourth main voltage divider is provided with eleven taps D₀～D₁₀The fifth main voltage divider is provided with eleven taps E₀～E₁₀The sixth main voltage divider is provided with a tap F₀～F₁₀(ii) a The 2 nd-stage core IV also has a connection winding G₀G₁₀With a number of turns equal to F₀F₁G connected to the main voltage divider in the third voltage divider₀～G₁₀And (4) winding.

The third voltage division piece is a common single-stage structure, and comprises an iron core V and a proportional winding G wound on the iron core V₀～G₁₀And H₀～H₁₀The seventh disk and the eighth disk of the main voltage divider are formed; the seventh disk voltage divider is provided with eleven taps G₀～G₁₀(ii) a The eighth disk voltage divider is provided with eleven taps H₀～H₁₀(ii) a Eighth disk divider terminal N₀Is connected to ground.

The main voltage divider is eight disks, while the auxiliary voltage divider only has six disks, so that only six-disk self-calibration can be carried out; the error of the sixth disc is less than 2 x10^-8The errors of the seventh and eighth discs are smaller and can be ignored;

based on the structure, the relay circuit module comprises nine relay circuit boards, wherein eight of the relay circuit boards are connected with 1-8 main divider winding taps and 1-6 auxiliary divider winding taps of the self-correcting multi-disc inductive divider, and a common line is connected with a K wiring terminal on a full-automatic inductive divider panel; the last relay circuit board is used for inputting the working voltage of the induction voltage divider, 10 relays are used, the voltage is sequentially 100-1000V, and two common lines of the relay circuit board can be selected according to actual conditions and are respectively connected with the panel A, A0, namely the main voltage divider is connected with A0, and the auxiliary voltage divider is connected with A;

the touch screen and the relay circuit module replace the traditional drive plate:

since the structure and the working principle of 1-6 disks, namely A-F disks, are the same, taking the first disk A as an example for explanation, the scales of the original drive disk of the disk A are 0-10, and correspond to two groups of taps of main voltage dividers A0-A10 and auxiliary voltage dividers a 0-a 10; when the dial scale 0 is selected, a0, A0 and A1 are communicated;

when the dial scale 1 is selected, a1, A1 and A2 are respectively communicated with the output end of the first disc auxiliary voltage divider, the output end of the first disc main voltage divider and the input end of the first disc differential pressure loop;

when the dial scale 2 is selected, a2, A2 and A3 are respectively communicated with the output end of the first disc auxiliary voltage divider, the output end of the first disc main voltage divider and the input end of the first disc differential pressure loop;

when the dial scale 3 is selected, A3, A3 and A4 are respectively communicated with the output end of the first disc auxiliary pressure divider, the output end of the first disc main pressure divider and the input end of the first disc differential pressure loop;

when the dial scale 4 is selected, a4, A4 and A5 are respectively communicated with the output end of the first disc auxiliary voltage divider, the output end of the first disc main voltage divider and the input end of the first disc differential pressure loop;

when the dial scale 5 is selected, a5, A5 and A6 are respectively communicated with the output end of the first disc auxiliary voltage divider, the output end of the first disc main voltage divider and the input end of the first disc differential pressure loop;

when the dial scale 6 is selected, a6, A6 and A7 are respectively communicated with the output end of the first disc auxiliary pressure divider, the output end of the first disc main pressure divider and the input end of the first disc differential pressure loop;

when the dial scale 7 is selected, a7, A7 and A8 are respectively communicated with the output end of the first disc auxiliary pressure divider, the output end of the first disc main pressure divider and the input end of the first disc differential pressure loop;

when the dial scale 8 is selected, a8, A8 and A9 are respectively communicated with the output end of the first disc auxiliary pressure divider, the output end of the first disc main pressure divider and the input end of the first disc differential pressure loop;

when the dial scale 9 is selected, a9, A9 and A10 are respectively communicated with the output end of the first disc auxiliary pressure divider, the output end of the first disc main pressure divider and the input end of the first disc differential pressure loop;

when the dial scale 10 is selected, a10 and a10 are respectively communicated with the output end of the first disk subsidiary voltage divider and the output end of the first disk main voltage divider.

In order to realize the traditional dial function of the inductive voltage divider, the design uses two types of relays, namely a type I relay and a type II relay, wherein the type I relay is a double-pole single-throw relay; the type ii relay is a single pole single throw relay, and table 1 is a description of the terminals of each relay in the first disk relay circuit board.

TABLE 1

In the design, each pair of main and auxiliary voltage divider taps a0A0, a1A1, a2A2, A3A3 … … a9A9 and a10A10 are respectively connected with two switch interfaces of an I-type relay, so that the on-off control is realized at the same time; and then, the taps A1, A1 and A2 … … A10 of each main voltage divider are respectively connected with a II-type relay to realize independent on-off control. In the figure, "a" is the first disk auxiliary voltage divider total output, "a" is the first disk main voltage divider total output, "K1" is the first disk differential pressure loop input for self-calibration work, and different disks in self-calibration will use different K ends, such as: when the second plate is calibrated by self, the relay corresponding to K2 is switched on; for the seventh and eighth disks, only the main voltage divider structure is needed, and only 0-10 taps of the main voltage divider are respectively connected with the II-type relay; the corresponding I-type and II-type relays are switched on and off according to gears required by each plate, so that the same function as that of a driving plate can be realized by controlling the on and off of the relays;

for example: now, if the first disk is set to be "2-gear", that is, the scale 2 of the original dial structure is required, according to the above description, the taps a2, a2 and A3 need to be respectively communicated with the output end of the first disk auxiliary voltage divider, the output end of the first disk main voltage divider and the input end K1 of the first disk differential pressure loop, and the connection wire is represented as A3 # double-pole single-throw relay, a2 # single-pole single-throw relay and A3 # single-pole single-throw relay for suction; the first disc auxiliary voltage divider tap a2 is communicated with the first disc auxiliary voltage divider output terminal a, the first disc main voltage divider tap a2 is communicated with the first disc main voltage divider output terminal, and the first disc main voltage divider tap A3 is communicated with the first disc differential pressure loop input terminal K1; in addition, 100V-1000V input buttons and K, D terminal buttons on a panel of the traditional sensing voltage divider are also controlled to be switched on and off through relays respectively; all relays are uniformly controlled by a CPU control circuit;

the touch screen is divided into four key areas, which are respectively as follows: a voltage input selection area with ten keys for selecting 100-1000V input voltage; the input end selection area of the differential pressure loop is provided with six keys, and K1-K6 are correspondingly selected according to a calibrated disc during self-calibration; the disk selection area comprises eight keys and is used for selecting 1-8 disks which need to be operated currently; the digital keyboard region sets the voltage gear needed by the selected disk by inputting the number;

the touch screen operation method comprises the following steps: and sequentially clicking keys in different areas of the touch screen according to needs to complete settings such as voltage selection, self-calibration disc selection, gear selection and the like. After a key on the touch screen is clicked, the touch screen can send an operation instruction to the CPU control circuit, and the CPU control circuit controls the on-off of the corresponding relay according to the instruction. The computer can also send instructions to the CPU control circuit to realize the control function.

The comprehensive cabinet comprises a voltage regulator, a booster, a calibrator and a motor control module; the calibrator and the motor control module are controlled by a computer, the motor control module is used for regulating the output voltage of the voltage regulator, and the output voltage is connected with the input end of the booster to provide working voltage for the full-automatic induction voltage divider; the verification result of the calibrator can be transmitted to a computer for display;

the computer comprises an equipment control module and a data operation module, wherein the equipment control module is used for inputting measurement parameters, transmitting measurement data and controlling the operation of each equipment in the comprehensive cabinet; the data operation module is used for calculating, screening, displaying and storing the measured data.

The self-calibration and mutual-calibration method of the full-automatic inductive voltage divider calibration system comprises the following steps:

(1) electrifying the calibrating device

Before power-on, firstly checking that the testing connection is correct, and connecting the RS232 interfaces of the full-automatic induction voltage divider, the voltage regulator and the calibrator with the computer, wherein the induction voltage divider and the voltage regulator share one RS232 interface.

And starting a key master switch on the panel, and if the carbon brush of the voltage regulator is not at the zero position at the moment, automatically descending to the zero position in advance, and then, in the process of descending to the zero position, temporarily disabling the starting key.

After the carbon brush of the voltage regulator is reduced to the zero position, two sound prompt tones can be emitted to complete the electrification.

The touch screen realizes the operations of voltage selection, disk number selection, gear selection and the like through key input. The keys 100V-1000V are selected for input of the inductive voltage divider, so that the input can be carried out from 10 bits, namely 1000V, and can also be carried out from 9-1 bits, namely 900-100V, so that the boosted inductive voltage divider is obtained; the accuracy of the inductive voltage divider is that the accuracy of the inductive voltage divider is reduced when the input voltage is input at 10 bits and when the input voltage is input at 9-1 bits, and particularly the error is larger during boosting. Keys K1-K6 are switched from 1 to 6 disks during self-calibration, and keys X100V-X0.01mV are input in 1 to 8 disk gear positions.

A0 and A in the panel of the full-automatic induction voltage divider are connected with the output of the voltage regulator, 100V (a), 10V (a', x) of output voltage are connected with the end of the check meter A, X, K, D is connected with the end of the check meter K, D, N0 is connected with D, and two N end buttons are completely the same and are convenient for grounding nearby;

(2) self-correcting process

Firstly, parameter setting is carried out through a touch screen, then a K key of a corresponding disc is selected, if self-calibration is carried out on a first disc, the K1 key is pressed, the gear of a second disc is set to be 10, 100V is selected by a 6-percent meter of a calibrator, and the precision is 0.001; setting the gears of the first disc to be 0-9 gears in sequence, and obtaining self-checking data of 10 gears of the first disc;

when self-calibration is carried out under the input voltage of 1000V-400V, 1200V is selected as the output gear of the booster; when self-calibration is carried out under the input voltage of 300V-100V, the output gear of the booster should be 400V; in the self-calibration process, the voltage regulator can control the voltage to rise and fall through a cabinet button lifting key, and can also control the voltage to rise and fall through a serial port by using an equipment control module in a computer;

when a computer is used for measurement, parameters such as test date, a dial plate, test voltage and the like are selected in a program interface in a computer data operation module, a full-automatic self-correction key is clicked, self-correction is started, after error data test is completed under 20% -120% rated voltage of 10 gears of each disk, data storage is clicked, and then the next disk is selected for continuous measurement;

(3) mutual calibration process

The primary winding of the tested induction voltage divider is connected with a power supply end, and the secondary winding of the tested induction voltage divider is connected with a terminal a and a terminal x of the checking instrument. And correspondingly setting the inductive voltage divider on the touch screen according to the measured proportional relation, if the inductive voltage divider is measured as 500/50 voltage transformer, setting the inductive voltage divider to 1000V/100V for measurement according to the proportional relation, inputting the inductive voltage divider to select 1000V, and selecting 10 grades by a second disk, namely an X10V key, so that mutual calibration can be performed on the 500/50 voltage transformer. Theoretically, the eight disc gears are set, so that the tested mutual inductor with any voltage ratio can be measured;

in the mutual calibration process, the booster can control the lifting through a cabinet button lifting key, and the equipment control module in the computer can also be used for controlling the lifting through a serial port;

and the mutual calibration measurement process by using a computer is consistent with the self-calibration process of the previous step.

Compared with the prior art, the invention has the following beneficial effects:

the invention firstly reforms the panel structure of the traditional sensing voltage divider, so that the operation flow is greatly simplified. Meanwhile, relevant equipment is configured for a single inductive voltage divider device, and a complete set of detection system is formed. The detection system can realize the functions of power supply, measurement, multi-transformation ratio switching, data calculation, result display and the like, the whole process is automatically carried out, the working efficiency can be improved, the labor intensity of workers is reduced, and the production safety is guaranteed.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a fully automatic inductive voltage divider panel of the present invention;

FIG. 3 is a flow chart of the system control of the present invention;

FIG. 4 is a schematic diagram of a multi-disk self-calibrating inductive voltage divider of the present invention;

FIG. 5 is a schematic diagram of the touch screen of the present invention in place of a dial;

FIG. 6 is a schematic view of a touch screen interface of the present invention;

FIG. 7 is a self-correcting circuit diagram of the present invention;

FIG. 8 is a cross-calibration circuit diagram of the present invention.

In the figure: 1-integrated cabinet; 1-voltage booster; 1-2-voltage regulator; 1-3-motor control module; 1-4-a calibrator; 2-full automatic inductive voltage divider assembly; 2-1-self-calibrating multiple-disk inductive voltage divider;

2-1a — a first divider;

2-1a0 — supply winding; 2-1a 1-first disk main voltage divider with tap A₀～A₁₀(ii) a 2-1a 2-second main voltage divider with tap B₀～B₁₀(ii) a 2-1a 3-third main voltage divider with tap C₀～C₁₀(ii) a 2-1a 4-first disk subsidiary divider with tap a₀～a₁₀(ii) a 2-1a 5-second disk subsidiary divider with tap b₀～b₁₀(ii) a 2-1a 6-third disk subsidiary divider having a tap c₀～c₁₀(ii) a 2-1a 7-associated winding D₀D₁₀(ii) a 2-1a 8-associated winding d₀d₁₀(ii) a 2-1a 9-1 st stage core I; 2-1a 10-2 nd stage core ii;

2-1 b-a second divider member;

2-1b 1-fourth main voltage divider with tapsD₀～D₁₀(ii) a 2-1b 2-fifth main voltage divider, comprising a tap E₀～E₁₀(ii) a 2-1b3 sixth main voltage divider with tap F₀～F₁₀(ii) a 2-1b 4-fourth disk subsidiary divider having a tap d₀～d₁₀(ii) a 2-1b 5-fifth disk subsidiary divider with tap e₀～e₁₀(ii) a 2-1b6 sixth disk subsidiary divider with tap f₀～f₁₀(ii) a 2-1b 7-contact winding G₀G₁₀(ii) a 2-1b 8-stage 1 iron core iii; 2-1b 9-2 nd stage core iv;

2-1 c-a third part press;

2-1c 1-seventh plate with tap G₀～G₁₀(ii) a 2-1c 2-eighth disc, having a tap H₀～H₁₀(ii) a 2-1c 3-core v;

2-relay circuit module;

2-21-1 number double pole single throw relay; 2-22-2 double-pole single-throw relay; 2-23-1 single-pole single-throw relay; a No. 2-24-3 double-pole single-throw relay; 2-25-2 single-pole single-throw relay; no. 2-26-4 double-pole single-throw relay; 2-27-3 single-pole single-throw relay; no. 2-28-5 double-pole single-throw relay; 2-29-4 single-pole single-throw relay; no. 2-210-6 double-pole single-throw relay; single-pole single-throw relay No. 2-211-5; no. 2-212-7 double-pole single-throw relay; 2-213-6 single-pole single-throw relay; no. 2-214-8 double-pole single-throw relay; 2-215-7 single-pole single-throw relay; no. 2-216-9 double-pole single-throw relay; single-pole single-throw relay No. 2-217-8; no. 2-218-10 double-pole single-throw relay; single-pole single-throw relay No. 2-219-9; no. 2-220-11 double-pole single-throw relay; single-pole single-throw relay No. 2-221-10;

2-3-full auto-induction divider panel;

2-3 a-touch screen;

2-3a 1-voltage input selection button area; 2-3a 2- "K" select button region; 2-3a 3-disc selection area; 2-3a 4-numeric keypad;

2-3 b-a CPU control circuit;

3-a computer; 4-primary winding of the tested induction voltage divider; 5-Secondary winding of the tested inductive divider.

Detailed Description

As shown in fig. 1, the full-automatic inductive voltage divider calibrating system includes a full-automatic inductive voltage divider assembly 2, a comprehensive cabinet 1 and a computer 3, and is characterized in that: the full-automatic inductive voltage divider assembly 2 comprises a self-correcting multi-disk inductive voltage divider 2-1, a relay circuit module 2-2 and a full-automatic inductive voltage divider panel 2-3;

the full-automatic induction voltage divider panel 2-3 comprises a touch screen 2-3a and a CPU control circuit 2-3 b; as shown in fig. 3, the touch screen 2-3a is connected to the CPU control circuit 2-3b through a data line, the computer 3 is connected to the CPU control circuit 2-3b through a data line, and the CPU control circuit 2-3b is connected to the motor control module 1-3 and the relay circuit module 2-2 through data, respectively;

the comprehensive cabinet 1 comprises a booster 1-1, a voltage regulator 1-2, a motor control module 1-3 and a calibrator 1-4;

the calibrator 1-4 is connected with a motor control module 1-3 through a control circuit, the motor control module 1-3 is connected with a motor control end on the voltage regulator 1-2 through a control circuit, and an output end of the voltage regulator 1-2 is connected with an input end of the booster 1-1; the booster 1-1 supplies power to the self-correcting multi-disk inductive voltage divider 2-1, and the computer 3 sends an action instruction to the relay circuit module 2-2 through a control circuit; after receiving an action instruction, the relay circuit module 2-2 changes a transformation ratio combination on the self-correcting multi-disk inductive voltage divider 2-1, the self-correcting multi-disk inductive voltage divider 2-1 outputs an electric signal to the calibrator 1-4, a calibration result of the calibrator 1-4 is transmitted to the computer 3 through a signal line, and the computer 3 respectively sends the action instruction to the calibrator 1-4 and the motor control module 1-3 through a control line;

as shown in FIG. 4, the self-calibrating disk sensing voltage divider 2-1 includes a first voltage divider 2-1a, a second voltage divider 2-1b, and a third voltage divider 2-1 c. Each disk in the first voltage division element and the second voltage division element is composed of a main voltage divider and an auxiliary voltage divider, the number of turns of the windings of the main voltage divider and the auxiliary voltage divider is completely equal, and the number of turns of each disk is 1/10 of the number of turns of the previous disk. The third voltage division part is only provided with a main voltage divider. The winding of the main voltage divider or the auxiliary voltage divider of each disk is equally divided into eleven taps, corresponding voltage can be obtained by selecting different taps through a dial, the output voltage of each disk can be superposed on the next disk through a lead, and finally the output voltage formed by combining eight disks can be obtained.

The power supply winding 2-1a0 is externally connected with a booster and the winding a₀～a₁₀And the connecting part is used for inputting working voltage for the inductive voltage divider.

The first voltage division part 2-1a is of a two-stage structure, wherein a1 st-stage iron core I2-1a9 and a proportional winding a wound on the iron core I₀～a₁₀、b₀～b₁₀And c₀～c₁₀Forming discs 1 to 3 of the auxiliary voltage divider; the first disk sub-bleeder 2-1a4 is provided with eleven taps, i.e. a₀～a₁₀(ii) a The second disk sub-bleeder 2-1a5 is provided with eleven taps, i.e. b₀～b₁₀(ii) a The third disk subsidiary divider 2-1a6 is provided with eleven taps, i.e. c₀～c₁₀. The 1 st iron core I is also provided with a connection winding d₀d₁₀2-1a8, the number of turns being equal to c₀c₁D connected to the auxiliary voltage divider in the second voltage divider 2-1b₀～d₁₀And (4) winding.

The 2 nd-stage iron cores II 2-1a10 in the first voltage division piece are used as magnetic shielding iron cores at the same time, and proportional windings A wound on the iron cores I and II₀～A₁₀、B₀～B₁₀And C₀～C₁₀1 st to 3 rd disks forming a main voltage divider; the first disk main transformer 2-1a1 is provided with ten taps, a₀～A₁₀(ii) a The second main disk voltage divider 2-1a2 is provided with eleven taps, i.e. B₀～B₁₀(ii) a The third main partial divider 2-1a3 is provided with eleven taps, i.e. C₀～C₁₀. The 2 nd-stage iron core II is also provided with a connection winding D₀D₁₀2-1a7 with a number of turns equal to C₀C₁D connected to the main voltage divider of the second voltage divider 2-1b₀～D₁₀A winding;

the 1 st disc of the auxiliary voltage divider is simultaneously used as an excitation winding of input voltage;secondary windings ax and a on core I₀x₀Winding for supplying power to the checking instrument, ax number of turns of winding and b₀b₁₀Is equal to a₀x₀C and c₀c₁₀Equal;

the second voltage division piece 2-1b is still of a two-stage structure, a1 st stage iron core III 2-1b8 and a proportional winding d wound on the iron core III₀～d₁₀、e₀～e₁₀And f₀～f₁₀Fourth to sixth disks constituting the auxiliary voltage divider; the fourth disk subsidiary divider 2-1b4 is provided with eleven taps, i.e. d₀～d₁₀(ii) a The fifth disk subsidiary divider 2-1b5 is provided with eleven taps, i.e. e₀～e₁₀(ii) a The sixth disk subsidiary divider 2-1b6 is provided with eleven taps, i.e. f₀～f₁₀；

Proportional winding D on the 2 nd-stage iron core IV 2-1b9 in the second voltage division part₀～D₁₀、E₀～E₁₀And F₀～F₁₀The fourth disk to the sixth disk which form the main voltage divider; the fourth main divider 2-1b1 is provided with eleven taps D₀～D₁₀The fifth main voltage divider 2-1b2 is provided with eleven taps E₀～E₁₀The sixth main voltage divider 2-1b3 is provided with a tap F₀～F₁₀. The 2 nd-stage core IV also has a connection winding G₀G₁₀2-1b7, the number of turns being equal to F₀F₁G connected to the main voltage divider in the third voltage divider 2-1c₀～G₁₀And (4) winding.

The third voltage division piece 2-1c is a general single-stage structure, and comprises an iron core V2-1 c3 and a proportional winding G wound on the iron core V₀～G₁₀And H₀～H₁₀The seventh disk and the eighth disk of the main voltage divider are formed; the seventh disk voltage divider 2-1c1 is provided with eleven taps G₀～G₁₀(ii) a The eighth disk voltage divider 2-1c2 is provided with eleven taps H₀～H₁₀(ii) a Eighth disk divider terminal N₀Is connected to ground.

The main voltage divider is eight disks, while the auxiliary voltage divider only has six disks, so that only six-disk self-calibration can be carried out; the self-correcting result shows that the error of the sixth disk is less than 210^-8The errors of the seventh and eighth discs are smaller and can be ignored;

based on the structure, the relay circuit module 2-2 comprises nine relay circuit boards, wherein eight of the relay circuit boards are connected with 1-8 main divider winding taps and 1-6 auxiliary divider winding taps of the self-correcting multi-disc inductive divider 2-1, and a common line is connected with a K wiring terminal on the full-automatic inductive divider panel 2-3; the last relay circuit board is used for input voltage selection, and a common line of the last relay circuit board is connected with a panel A, A0, namely a main voltage divider is connected with A0, and an auxiliary voltage divider is connected with A;

a specific implementation of a touch screen and relay circuit module instead of a conventional dial is shown in figure 5,

since 1-6 disks, namely disks a-F in fig. 4, have the same disk structure and working principle, now the first disk a is taken as an example for explanation, and the scales of the original dial of disk a are 0-10, which correspond to two groups of taps of main voltage dividers a 0-a 10 and auxiliary voltage dividers a 0-a 10 in fig. 4; when the dial scale 0 is selected, a0, A0 and A1 are communicated;

when the dial scale 1 is selected, a1, A1 and A2 are respectively communicated with the output end of the first disc auxiliary voltage divider, the output end of the first disc main voltage divider and the input end of the first disc differential pressure loop;

when the dial scale 2 is selected, a2, A2 and A3 are respectively communicated with the output end of the first disc auxiliary voltage divider, the output end of the first disc main voltage divider and the input end of the first disc differential pressure loop;

when the dial scale 3 is selected, A3, A3 and A4 are respectively communicated with the output end of the first disc auxiliary pressure divider, the output end of the first disc main pressure divider and the input end of the first disc differential pressure loop;

when the dial scale 4 is selected, a4, A4 and A5 are respectively communicated with the output end of the first disc auxiliary voltage divider, the output end of the first disc main voltage divider and the input end of the first disc differential pressure loop;

when the dial scale 5 is selected, a5, A5 and A6 are respectively communicated with the output end of the first disc auxiliary voltage divider, the output end of the first disc main voltage divider and the input end of the first disc differential pressure loop;

when the dial scale 6 is selected, a6, A6 and A7 are respectively communicated with the output end of the first disc auxiliary pressure divider, the output end of the first disc main pressure divider and the input end of the first disc differential pressure loop;

when the dial scale 7 is selected, a7, A7 and A8 are respectively communicated with the output end of the first disc auxiliary pressure divider, the output end of the first disc main pressure divider and the input end of the first disc differential pressure loop;

when the dial scale 8 is selected, a8, A8 and A9 are respectively communicated with the output end of the first disc auxiliary pressure divider, the output end of the first disc main pressure divider and the input end of the first disc differential pressure loop;

when the dial scale 9 is selected, a9, A9 and A10 are respectively communicated with the output end of the first disc auxiliary pressure divider, the output end of the first disc main pressure divider and the input end of the first disc differential pressure loop;

when the dial scale 10 is selected, a10 and a10 are respectively communicated with the output end of the first disk subsidiary voltage divider and the output end of the first disk main voltage divider.

In order to realize the traditional dial function of the inductive voltage divider, as shown in fig. 5, two types of relays, i type and ii type, are used in the design, wherein the relay of type i is a double-pole single-throw relay; the type ii relay is a single pole single throw relay, and table 1 is a description of the terminals of each relay in the first disk relay circuit board.

As shown in fig. 5, the a terminal is connected to one fixed contact of the No. 7 double pole single throw relay 2-212, and the fixed contacts of the No. 1 double pole single throw relay 2-21, the No. 2 double pole single throw relay 2-22, the No. 3 double pole single throw relay 2-24, the No. 4 double pole single throw relay 2-26, the No. 5 double pole single throw relay 2-28, and the No. 6 double pole single throw relay 2-210 are also connected to the a terminal;

one fixed contact of No. 8 double-pole single-throw relay 2-214, No. 9 double-pole single-throw relay 2-216, No. 10 double-pole single-throw relay 2-218 and No. 11 double-pole single-throw relay 2-220 is connected with the terminal a;

the A terminal is connected with another fixed contact of a No. 7 double-pole single-throw relay 2-212, another fixed contact of a No. 1 double-pole single-throw relay 2-21 is connected with the A terminal, and another fixed contact of a No. 2 double-pole single-throw relay 2-22, a No. 3 double-pole single-throw relay 2-24, a No. 4 double-pole single-throw relay 2-26, a No. 5 double-pole single-throw relay 2-28 and a No. 6 double-pole single-throw relay 2-210 is also connected with the A terminal;

the K1 terminal is connected with the fixed contacts of a No. 1 single-pole single-throw relay 2-23, a No. 2 single-pole single-throw relay 2-25, a No. 3 single-pole single-throw relay 2-27, a No. 4 single-pole single-throw relay 2-29, a No. 5 single-pole single-throw relay 2-211, a No. 6 single-pole single-throw relay 2-213, a No. 7 single-pole single-throw relay 2-215, a No. 8 single-pole single-throw relay 2-217, a No. 9 single-pole single-throw relay 2-219 and a No. 10 single-pole single-throw relay 2-221;

in the design, each pair of main and auxiliary voltage divider taps a0A0, a1A1, a2A2, A3A3 … … a9A9 and a10A10 are respectively connected with two switch interfaces of an I-type relay, so that the on-off control is realized at the same time; and then, the taps A1, A1 and A2 … … A10 of each main voltage divider are respectively connected with a II-type relay to realize independent on-off control. In the figure, "a" is the first disk auxiliary voltage divider total output, "a" is the first disk main voltage divider total output, "K1" is the first disk differential pressure loop input for self-calibration work, and different disks in self-calibration will use different K ends, such as: when the second plate is calibrated, the relay corresponding to K2 is conducted. For 7 and 8 disks, only the main voltage divider structure is needed, and only 0-10 taps of the main voltage divider are respectively connected with the II-type relay. The corresponding I-type and II-type relays are switched on and off according to gears required by each plate, so that the same function as that of a driving plate can be realized by controlling the on and off of the relays;

for example: now, if the first disk is set to be "2-gear", that is, the "scale 2" of the original dial structure, according to the above description, the taps a2, a2, and A3 need to be respectively communicated with the output end of the first disk auxiliary voltage divider, the output end of the first disk main voltage divider, and the input end K1 of the first disk differential pressure loop, and then the two-pole single-throw relay 2-24, the single-pole single-throw relay 2-25, and the single-pole single-throw relay 2-27 shown in fig. 5 are attracted; the first disc auxiliary voltage divider tap a2 is communicated with the first disc auxiliary voltage divider output terminal a, the first disc main voltage divider tap a2 is communicated with the first disc main voltage divider output terminal, and the first disc main voltage divider tap A3 is communicated with the first disc differential pressure loop input terminal K1; in addition, 100V-1000V input buttons and K, D terminal buttons on a panel of the traditional sensing voltage divider are also controlled to be switched on and off through relays respectively; all relays are uniformly controlled by the CPU control circuit 2-3 b.

The schematic diagram of the touch screen is shown in fig. 6, the touch screen is divided into four key areas, which are respectively: a voltage input selection area 2-3a1 with ten keys for selecting 100V-1000V input voltage; the input end of the differential pressure loop selects the area 2-3a2, the total number of the keys is six, and the keys are correspondingly selected from K1-K6 according to a calibrated disc during self-calibration; the disk selection area 2-3a3 comprises eight keys for selecting 1-8 disks which need to be operated currently; a numerical keyboard zone 2-3a4 for setting the voltage steps needed on the selected disk by inputting numbers;

the touch screen operation method comprises the following steps: and sequentially clicking keys in different areas of the touch screen according to needs to complete settings such as voltage selection, self-calibration disc selection, gear selection and the like. After a key on the touch screen is clicked, the touch screen can send an operation instruction to the CPU control circuit 2-3b, and the CPU control circuit 2-3b controls the on-off of the corresponding relay according to the instruction. The computer can also send instructions to the CPU control circuit to realize the control function.

The comprehensive cabinet 1 comprises a voltage regulator 1-2, a booster 1-1, a calibrator 1-4 and a motor control module 1-3; the calibrator 1-4 and the motor control module 1-3 are controlled by the computer 3, the motor control module 1-3 is used for regulating the output voltage of the voltage regulator 1-2, the output voltage is connected with the input end of the booster 1-1, and the working voltage is provided for the full-automatic induction voltage divider; the verification result of the calibrator 1-4 can be transmitted to the computer 3 for display, and the wiring method of the calibrator 1-4 is described in detail later;

as shown in fig. 3, the control signal can be input by the computer 3 or the touch screen 2-3a and transmitted to the CPU control circuit 2-3b to control the on/off of the corresponding relay in the relay circuit module 2-2. The CPU control circuit 2-3b provides a control signal for the motor control module 1-3, and controls the voltage regulator 1-2 to provide working voltage for the self-correcting multi-disk inductive voltage divider 2-1; the self-correcting multi-disk inductive voltage divider 2-1 is connected with a calibrator 1-4, the calibrator 1-4 is controlled by a computer 3, and simultaneously, test data are transmitted back to the computer 3 for processing, and a final result is generated;

the computer 3 comprises an equipment control module and a data operation module, wherein the equipment control module is used for inputting measurement parameters, transmitting measurement data and controlling the operation of each equipment in the comprehensive cabinet; the data operation module is used for calculating, screening, displaying and storing the measured data.

The self-calibration and mutual-calibration process of the full-automatic inductive voltage divider calibration system comprises the following steps:

(1) electrifying the calibrating device

Before power-on, firstly checking that the testing connection is correct, and connecting the RS232 interfaces of the full-automatic induction voltage divider, the voltage regulator and the calibrator with the computer, wherein the induction voltage divider and the voltage regulator share one RS232 interface.

And starting a key master switch on the panel, and if the carbon brush of the voltage regulator is not at the zero position at the moment, automatically descending to the zero position in advance, and then, in the process of descending to the zero position, temporarily disabling the starting key.

After the carbon brush of the voltage regulator is reduced to the zero position, two sound prompt tones can be emitted to complete the electrification.

The touch screen realizes the operations of voltage selection, disk number selection, gear selection and the like through key input. The keys 100V-1000V are selected for input of the inductive voltage divider, so that the input can be carried out from 10 bits, namely 1000V, and can also be carried out from 9-1 bits, namely 900-100V, so that the boosted inductive voltage divider is obtained; the accuracy of the inductive voltage divider is that the accuracy of the inductive voltage divider is reduced when the input voltage is input at 10 bits and when the input voltage is input at 9-1 bits, and particularly the error is larger during boosting. Keys K1-K6 are switched from 1 to 6 disks during self-calibration, and keys X100V-X0.01mV are input in 1 to 8 disk gear positions.

The panel 2-3 of the full-automatic induction voltage divider is shown in fig. 2, wherein a0 and a are connected with the output of the voltage regulator, the output voltage 100V, i.e. a, 10V, i.e. a', x is connected with the end of the check meter A, X, K, D is connected with the end of the check meter K, D, N0 is connected with D, and two N-end buttons are completely the same, so that the convenience of grounding nearby is realized.

(2) Self-correcting process

As shown in fig. 7, the automatic calibration circuit of the full-automatic sensing voltage divider firstly sets parameters through a touch screen 2-3a, then selects a K key of a corresponding disc, for example, performs automatic calibration on a first disc, presses down the K1 key, sets a second disc gear to 10 gears, and selects 100V for a 6-th dial indicator of the calibration instrument, wherein the precision is 0.001; the gear positions of the first disc are sequentially set to be 0-9 gear positions, and self-checking data of 10 gear positions of the first disc can be obtained.

When self-calibration is carried out under the input voltage of 1000V-400V, 1200V is selected as the output gear of the booster; when the self-calibration is carried out under the input voltage of 300V-100V, the booster output gear should select 400V. In the self-calibration process, the voltage regulator 1-2 can control the voltage to rise and fall through a cabinet button lifting key, and can also control the voltage to rise and fall through a serial port by using an equipment control module in a computer.

When a computer is used for measurement, parameters such as test date, a dial plate, test voltage and the like are selected in a program interface in a computer data operation module, a full-automatic self-correction key is clicked, self-correction is started, after error data test is completed under the rated voltage of 20% -120% of 10 gears of each disk, data storage is clicked, and then the next disk is selected for continuous measurement.

(3) Mutual calibration process

The mutual calibration wiring diagram of the full-automatic inductive voltage divider is shown in fig. 8, wherein a primary winding 4 of the tested inductive voltage divider is connected with a power supply end, and a secondary winding 5 of the tested inductive voltage divider is connected with a terminal a and a terminal x of a calibrator 1-4. And correspondingly setting on the touch screen according to the measured proportional relation, if the measured voltage is 500/50 voltage transformers, 1000V is selected by the inductive voltage divider input, and the 500/50 voltage transformer can be calibrated by selecting 10 steps through the second disk, namely the X10V key. Theoretically, by setting eight disc gears, the transformer to be tested with any voltage ratio can be measured.

In the mutual calibration process, the voltage regulator 1-2 can control the lifting through a cabinet button lifting key, and can also control the lifting through a serial port by using an equipment control module in a computer.

The mutual calibration measuring process by using a computer is basically consistent with the self-calibration process in the previous step.

(4) Self-correcting data processing

The computer data operation module performs operation processing on the measurement data transmitted by the calibrator according to the following principle, wherein the result after operation is the final measurement result and is displayed in a form of a table;

when the first disk error is self-corrected, corresponding input is selected according to the self-correcting processAnd selecting K2 according to the number of the disks, setting the gear of the second disk to be 10, setting the switches of other disks to be 0, and finally inputting 0-9 in sequence at the gear of the first disk, so that the 10 gears of the first disk can be automatically corrected. At this time, the segment voltages of the 1 st segment to the 10 th segment of the 1 st disc are respectively measuredRelative to a reference potentialError of (2)

Since the sum of the 1 st disc 10 segment errors equals zero.

Thus, it is possible to provide

In the formula-first disk reference potentialThe complex error of (2).

Errors in 1 st disk voltage ratios 1/0.1, … 1/0.i, … 1/1i is 1 to 10 and respectively

……………

Similarly, when the second disk is calibrated by self, the 3 rd disk switch is placed at 10 th, the K2 and the D are correspondingly connected with the terminal button of the calibrator K, D, the second disk switch is rotated, and the 1 st section is respectively measured from 0 to 9To paragraph 10Relative to a reference potentialError of (2)And so on.

When the primary voltage is not input at 1000V but input at 100V-900V, the calculation formula of the reference potential error of the first disk is changed into

And n is 1-10, corresponding to the input voltage of 100V-1000V, and the reading of the check meter is multiplied by a 10/n coefficient.

Errors in voltage ratios of 0.1n/0.1, 0.1n/0.2 … 0.1.1 n/1, and 0.1n/0.01, 0.1/0.2 … Andthe calculation formula of (a) is the same as the above formula,but this timeWhile

Except that the first disk is self-coupling, all the other disks are induction type, and all the disks have no load; the inductive voltage divider is a reference potential transformer, and each disc is provided with strict equipotential electrostatic shielding; thus, theoretically, the errors of the disks of such inductive dividers can be superimposed. For example, the voltage ratio KN 1/0.14285714 error is:

wherein the first through sixth discs each have self-calibration data and the error of the seventh disc 2-1c1 and the eighth disc 2-1c2 is approximately equal to zero. By superimposing the errors of the respective discs, an error of an arbitrary voltage ratio can be obtained.

The data processing algorithm can be realized by a computer data operation module of the full-automatic sensing voltage divider verification system, the measurement result of the calibrator is processed by the algorithm to be an error value of a corresponding transformation ratio, and the error value is used as an 'sensing voltage divider error' to be applied to other verification work.