阅读说明：本技术 一种电能计量方法 (Electric energy metering method ) 是由 郭良根 肖润明 姒勇芳 周慧霞 于 2019-10-14 设计创作，主要内容包括：本发明公开了一种电能计量方法,包括供电电源、检定装置、被检装置；本发明采用供电电源、检定装置、被检装置依次连接的检定方式,检定装置既起了检定被检装置电能计量的功能,又充当了被检装置在检定工作过程中的虚拟负载的作用,解决了由于现有技术采用供电电源、被检装置、检定装置、负载或负载箱依次连接的检定方式存在的被检装置工作电源不稳定、负载或负载箱的功耗巨大等问题,具有极高的市场推广价值。(The invention discloses an electric energy metering method, which comprises a power supply, a calibrating device and a detected device; the invention adopts the verification mode that the power supply, the verification device and the detected device are sequentially connected, the verification device not only has the function of verifying the electric energy metering of the detected device, but also has the function of virtual load of the detected device in the verification working process, and solves the problems of unstable working power supply of the detected device, huge power consumption of the load or the load box and the like in the verification mode that the power supply, the detected device, the verification device and the load or the load box are sequentially connected in the prior art, thereby having extremely high market popularization value.)

1. An electric energy metering method is characterized in that: the method comprises the following steps:

the method comprises the following steps: sequentially connecting a power supply (1), a calibrating device (3) and a detected device, wherein an output port of the detected device is connected to an input port of the calibrating device (3);

step two: the power supply (1) supplies power to the calibrating device (3);

step three: the calibrating device (3) provides a working power supply signal for the detected device;

step four: reading a pulse constant of the detected device, and inputting a pulse constant value into the verification device (3);

step five: the detected device outputs a metering signal through an output port, the metering signal is input into the calibrating device (3), the calibrating device (3) carries out signal conversion and processing on the metering signal to obtain an actual metering value, the calibrating device (3) carries out comparison analysis on the actual metering value to obtain an absolute value of a difference value between the actual metering value and an electric energy pulse value, the absolute value is error data obtained by calibrating of the calibrating device (3), and then the calibrating device (3) transmits the error data to the external PC (32).

2. The electric energy metering method according to claim 1, characterized in that: the calibrating device (3) comprises a current voltage source (31) for providing a working power supply signal for the device to be detected, a three-phase metering chip (36) for metering an input metering signal, and an intelligent processing chip (34) for performing signal conversion and processing on the metering signal and comparing and analyzing an obtained actual metering value with a preset electric energy pulse value, wherein the current voltage source (31), the three-phase metering chip (36) and the intelligent processing chip (34) are sequentially connected.

3. An electric energy metering method according to claim 1 or 2, characterized in that: the power supply source (1) is connected with the current voltage source (31) through the charging pile interface (37).

4. The electric energy metering method according to claim 3, characterized in that: the calibrating device (3) also comprises an alarm module (35) connected with the intelligent processing chip (34).

5. An electric energy metering method according to claim 1, 2 or 4, characterized in that: the intelligent processing chip (34) is connected with a key (33) used for inputting a preset electric energy pulse value.

6. The electric energy metering method according to claim 5, characterized in that: the current voltage source (31) is provided with a current voltage source circuit, the current voltage source circuit comprises a single chip microcomputer (311), a crystal oscillator (315) connected to a pin of the single chip microcomputer (311), two D/A conversion integrated chips (312) connected to the pin of the single chip microcomputer (311), and an operational amplifier (314) connected to the pin of the D/A conversion integrated chip (312), the pin of the single chip microcomputer (311) is connected with a first capacitor (316), and one end of the first capacitor (316) is grounded; a pin of the singlechip (311) is connected with a second capacitor (317), and one end of the second capacitor (317) is grounded; the crystal oscillator (315) is connected in parallel between the first capacitor (316) and the second capacitor (317).

7. The electric energy metering method according to claim 6, characterized in that: a bias resistor (313) is connected between the D/A conversion integrated chip (312) and the operational amplifier (314).

8. An electric energy metering method according to claim 6 or 7, characterized in that: the pin of singlechip (311) is connected with reset button (310), reset resistor (319), and the one end ground connection of reset resistor (319), and the one end of reset button (310) is connected on +5V power, and reset button (310) parallel connection has third electric capacity (318).

Technical Field

The invention relates to a metering method, in particular to an electric energy metering method.

Background

Disclosure of Invention

The invention solves the technical problem that the defects of the prior art are overcome, and provides an electric energy metering method which adopts a verification mode that a power supply, a verification device and a detected device are sequentially connected, wherein the verification device not only has the function of verifying the electric energy metering of the detected device, but also plays a role of verifying a virtual load of the detected device in the working process, and solves the problems of unstable working power supply of the detected device, huge power consumption of the load or a load box and the like in the verification mode that the power supply, the detected device, the verification device and the load or the load box are sequentially connected in the prior art.

In order to solve the technical problem, the invention is solved by the following technical scheme:

an electric energy metering method comprises the following steps:

the method comprises the following steps: sequentially connecting a power supply, a calibrating device and a detected device, wherein an output port of the detected device is connected to an input port of the calibrating device;

step two: the power supply supplies power to the calibrating device;

step three: the calibration device provides a working power supply signal for the device to be calibrated, so that the working power supply of the device to be calibrated is stable in the calibration working process and does not generate large fluctuation along with the influence of a power supply or a power supply grid;

step four: reading a pulse constant of the detected device, and inputting a pulse constant value in the verification device, wherein the pulse constant value is used as a theoretical value;

step five: the detected device outputs a metering signal through an output port, the metering signal is input into the calibrating device, the calibrating device carries out signal conversion and processing on the metering signal to obtain an actual metering value, the calibrating device carries out comparison analysis on the actual metering value to obtain an absolute value of a difference value between the actual metering value and an electric energy pulse value, the absolute value is error data obtained by calibrating of the calibrating device, and then the calibrating device transmits the error data to an external PC and displays the error data; the actual metering value obtained by the verification of the device to be detected is compared with the preset theoretical value to be analyzed to obtain error data, and the verification device and the device to be detected are adjusted in real time according to the error data so as to provide accurate electric energy metering.

Because the total power consumption of the verification method adopted by the prior art in the verification process can be as high as thousands of watts, compared with the prior art, under the same condition, the total power consumption of the verification method adopted by the invention, in which the power supply, the verification device and the detected device are sequentially connected, in the verification process is as low as a few watts, which is one tenth or even one hundredth of the prior art; therefore, the verification method does not need to additionally load a load or a load box, the verification device not only has the function of metering the electric energy of the verification device, but also serves as a virtual load of the detected device in the verification working process, and the power consumption of the verification device with the virtual load function in the verification working process is negligible compared with the huge power consumption brought by the fact that the load or the load box needs to be additionally loaded in the prior art, so that the verification method is energy-saving and environment-friendly.

Preferably, the verification device comprises a current voltage source for providing a working power supply signal for the detected device, a three-phase metering chip for metering an input metering signal, and an intelligent processing chip for performing signal conversion and processing on the metering signal and comparing and analyzing an obtained actual metering value with a preset electric energy pulse value, wherein the current voltage source, the three-phase metering chip and the intelligent processing chip are sequentially connected.

Preferably, the power supply is connected with the current voltage source through the charging pile interface.

Preferably, the calibrating device further comprises an alarm module connected with the intelligent processing chip, and the alarm module is arranged to provide an alarm function.

Preferably, the intelligent processing chip is connected with a key for inputting a preset electric energy pulse value, and the preset electric energy pulse value is input through the key.

Preferably, the current voltage source is provided with a current voltage source circuit, the current voltage source circuit comprises a single chip microcomputer, a crystal oscillator connected to a pin of the single chip microcomputer, two D/A conversion integrated chips connected to the pin of the single chip microcomputer, and an operational amplifier connected to the pin of the D/A conversion integrated chips, the pin of the single chip microcomputer is connected with a first capacitor, and one end of the first capacitor is grounded; a pin of the singlechip is connected with a second capacitor, and one end of the second capacitor is grounded; the crystal oscillator is connected in parallel between the first capacitor and the second capacitor. The crystal oscillator circuit formed by the crystal oscillator is used for providing clock frequency for the single chip microcomputer, and efficient operation of the single chip microcomputer is guaranteed.

Preferably, a bias resistor is connected between the D/a conversion integrated chip and the operational amplifier, and the bias resistor functions to reduce the influence of the input bias current on the output.

Preferably, a pin of the single chip microcomputer is connected with a reset button and a reset resistor, one end of the reset resistor is grounded, one end of the reset button is connected to a +5V power supply, and the reset button is connected with a third capacitor in parallel. The reset resistor pulls down a pin of the singlechip to be grounded when the reset button is not pressed; when the reset button is pressed, the pin of the single chip microcomputer is pulled up to a high level, and the third capacitor has a filtering function.

Due to the adoption of the technical scheme, the invention has the remarkable technical effects that: the verification device has the function of verifying the electric energy metering of the detected device and also has the function of serving as a virtual load of the detected device in the verification working process by adopting the verification mode that the power supply, the verification device and the detected device are sequentially connected, solves the problems of unstable working power supply of the detected device, huge power consumption of the load or the load box and the like in the verification mode that the power supply, the detected device, the verification device and the load or the load box are sequentially connected in the prior art, and has extremely high market popularization value.

Drawings

Fig. 1 is a schematic block diagram of an electric energy metering method, for example, an ac charging pile in the prior art.

Fig. 2 is a schematic block diagram of an embodiment of the electric energy metering method of the present invention.

FIG. 3 is a functional block diagram of an embodiment of a three-phase metrology chip of the present invention.

Fig. 4 is a schematic circuit diagram of an embodiment of the current-voltage source of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

The detected device in this embodiment describes the electric energy metering method in detail by taking a charging pile as an example.

An electric energy metering method, as shown in fig. 2-4, includes the following steps:

the method comprises the following steps: sequentially connecting a power supply 1, a calibrating device 3 and a charging pile 2, wherein an output port of the charging pile 2 is connected to an input port of the calibrating device 3;

step two: the power supply 1 supplies power to the calibrating device 3;

step three: the calibrating device 3 provides a working power supply signal for the charging pile 2;

step four: reading a pulse constant of the detected device, and inputting a pulse constant value in the verification device 3, wherein the pulse constant value is used as a theoretical value;

step five: the charging pile 2 outputs a metering signal through an output port, the metering signal is input into the calibrating device 3, the calibrating device 3 performs signal conversion and processing on the metering signal to obtain an actual metering value, the calibrating device 3 performs comparative analysis on the actual metering value to obtain an absolute value of a difference value between the actual metering value and an electric energy pulse value, the absolute value is error data obtained by calibrating of the calibrating device 3, and then the calibrating device 3 transmits the error data to the external PC 32 and displays the error data.

Because the total power consumption of the verification method adopted in the prior art in the verification process can be as high as thousands of watts, compared with the prior art, under the same conditions, the total power consumption of the verification method adopted by the embodiment in which the power supply, the verification device and the detected device are sequentially connected in the verification process is as low as a few watts, which is one tenth or even one hundredth of the prior art; therefore, the verification method does not need to additionally load a load or a load box, the verification device has the function of verifying the electric energy metering of the charging pile and also serves as the virtual load of the charging pile in the verification working process, and compared with the huge power consumption caused by the fact that the load or the load box needs to be additionally loaded in the prior art, the power consumption of the verification device with the virtual load function in the verification working process is negligible, so that the verification method is energy-saving and environment-friendly.

In this embodiment, the calibrating apparatus 3 includes a current voltage source 31 for providing a working power signal for the charging pile 2, a three-phase metering chip 36 for metering an input metering signal, and an intelligent processing chip 34 for performing signal conversion and processing on the metering signal and comparing and analyzing an obtained actual metering value with a preset electric energy pulse value, wherein the current voltage source 31, the three-phase metering chip 36, and the intelligent processing chip 34 are connected in sequence.

In this embodiment, the power supply 1 is connected to the current voltage source 31 through the charging pile interface 37.

In this embodiment, the calibrating apparatus 3 further includes an alarm module 35 connected to the intelligent processing chip 34.

In this embodiment, the intelligent processing chip 34 is connected to a button 33 for inputting a preset electric energy pulse value.

In this embodiment, the current-voltage source 31 is provided with a current-voltage source circuit, the current-voltage source circuit includes a single chip microcomputer 311, a crystal oscillator 315 connected to a pin of the single chip microcomputer 311, two D/a conversion integrated chips 312 connected to the pin of the single chip microcomputer 311, and an operational amplifier 314 connected to the pin of the D/a conversion integrated chip 312, the pin of the single chip microcomputer 311 is connected to a first capacitor 316, and one end of the first capacitor 316 is grounded; a pin of the singlechip 311 is connected with a second capacitor 317, and one end of the second capacitor 317 is grounded; the crystal 315 is connected in parallel between the first capacitor 316 and the second capacitor 317.

In this embodiment, a bias resistor 313 is connected between the D/a conversion integrated chip 312 and the operational amplifier 314.

In this embodiment, the pin of the single chip microcomputer 311 is connected with a reset button 310 and a reset resistor 319, one end of the reset resistor 319 is grounded, one end of the reset button 310 is connected to a +5V power supply, and the reset button 310 is connected with a third capacitor 318 in parallel.

In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.