阅读说明：本技术 水气表方案板的批量测试装置 (Batch testing device for water-gas meter chopping boards ) 是由 张吉太 刘有容 王伟奇 于 2021-08-10 设计创作，主要内容包括：本申请公开了一种水气表方案板的批量测试装置。所述批量测试装置,包括：脉冲信号发生器、脉冲隔离放大单元、脉冲隔离驱动单元、反向脉冲隔离测试单元；所述脉冲信号发生器,用于生成并输出脉冲信号；所述脉冲隔离放大单元,用于接收并放大所述脉冲信号,并以电气特性隔离的方式,生成第一脉冲控制信号；N个所述脉冲隔离驱动单元,用于响应所述第一脉冲控制信号,并以电气特性隔离的方式,生成第二脉冲控制信号；至少1个所述反向脉冲隔离测试单元,用于根据所述第二脉冲控制信号,以单向电气特性隔离的方式测试所述水气表方案板。本申请通过以电气隔离的方式并列批量测试方案板,可以有效提高方案板测试效率。(The application discloses batch testing arrangement of water gas table board. The batch test device comprises: the device comprises a pulse signal generator, a pulse isolation amplifying unit, a pulse isolation driving unit and a reverse pulse isolation testing unit; the pulse signal generator is used for generating and outputting a pulse signal; the pulse isolation amplifying unit is used for receiving and amplifying the pulse signal and generating a first pulse control signal in an electrical characteristic isolation mode; the N pulse isolation driving units are used for responding to the first pulse control signals and generating second pulse control signals in an electrical characteristic isolation mode; and at least 1 reverse pulse isolation test unit for testing the water-gas surface pattern plate in a unidirectional electrical characteristic isolation manner according to the second pulse control signal. The scheme board testing efficiency can be effectively improved by testing the scheme boards in parallel in batches in an electrical isolation mode.)

1. The utility model provides a batch test device of water gas table board which characterized in that includes:

a pulse signal generator including an output terminal;

the pulse isolation amplifying unit comprises an input end and an output end;

the pulse isolation driving unit comprises an input end and an output end;

the reverse pulse isolation test unit comprises a first connecting end and a second connecting end;

the output end of the pulse signal generator is connected with the input end of the pulse isolation amplifying unit;

n input ends of the N pulse isolation driving units are connected with the output end of the pulse isolation amplifying unit in parallel;

the output end of at least one of the N pulse isolation driving units is connected with the first connecting end of at least 1 reverse pulse isolation testing unit;

the second connecting end of the reverse pulse isolation testing unit is used for connecting the water-gas surface pattern plate;

the pulse signal generator is used for generating and outputting a pulse signal;

the pulse isolation amplifying unit is used for receiving and amplifying the pulse signal and generating a first pulse control signal in an electrical characteristic isolation mode;

the pulse isolation driving unit is used for responding to the first pulse control signal and generating a second pulse control signal in an electrical characteristic isolation mode;

the reverse pulse isolation test unit is used for testing the water-gas surface pattern plate in a one-way electrical characteristic isolation mode according to the second pulse control signal;

wherein N is a positive integer.

2. The batch test device of claim 1, wherein the pulse isolation amplification unit comprises at least a triode amplification circuit, a signal relay;

the triode amplifying circuit comprises an input end and an output end;

the signal relay comprises an input end and an output end;

the input end of the triode amplifying circuit is connected with the output end of the pulse signal generator;

the output end of the triode amplifying circuit is connected with the input end of the signal relay;

n input ends of the N pulse isolation driving units are connected with the output end of the signal relay in a parallel connection mode;

the triode amplifying circuit is used for carrying out reverse phase processing and amplifying the received signal pulse and outputting a pulse amplifying signal;

the signal relay is used for responding to the pulse amplification signal in an electric characteristic isolation mode and generating a first pulse control signal.

3. The batch test device of claim 1, wherein the pulse isolation amplification unit comprises at least a triode amplification circuit, a signal relay;

the triode amplifying circuit comprises an input end and an output end;

the signal relay comprises an input end and an output end;

the input end of the triode amplifying circuit is connected with the output end of the pulse signal generator;

the input ends of the N signal relays are connected with the output end of the triode amplifying circuit in a parallel mode;

the output ends of the N signal relays are connected with the input ends of the N pulse isolation driving units in a one-to-one independent connection mode;

the triode amplifying circuit is used for carrying out reverse phase processing and amplifying the received signal pulse and outputting a pulse amplifying signal;

the signal relay is used for responding to the pulse amplification signal in an electric characteristic isolation mode and generating a first pulse control signal.

4. The batch testing device of claim 2, wherein the output terminals of the signal relay include a first output terminal, a second output terminal;

the pulse isolation driving unit comprises a current-limiting resistor and a signal isolation relay;

the signal isolation relay at least comprises a first input end, a second input end, a first output end and a second output end;

the first output end of the signal relay is connected with one end of each of the current-limiting resistors of the N pulse isolation driving units;

the second output end of the signal relay is connected with the ground;

the other end of the current-limiting resistor is connected with a first input end of the signal isolation relay in the same pulse isolation driving unit;

the second input end of the signal isolation relay is connected with a power supply;

the first output end of the signal isolation relay is used for connecting the first connecting end of the reverse pulse isolation test unit;

the second output end of the signal isolation relay is connected with the ground;

the signal isolation relay is used for responding to the first pulse control signal in an electrical characteristic isolation mode and generating a second pulse control signal.

5. The batch testing device of claim 3, wherein the output terminals of the signal relay include a first output terminal, a second output terminal;

the pulse isolation driving unit comprises a current-limiting resistor and a signal isolation relay;

the signal isolation relay at least comprises a first input end, a second input end, a first output end and a second output end;

the output ends of the N signal relays are connected with one ends of the current-limiting resistors of the N pulse isolation driving units in a one-to-one independent connection mode;

the second output end of the signal relay is connected with the ground;

the other end of the current-limiting resistor is connected with a first input end of the signal isolation relay in the same pulse isolation driving unit;

the second input end of the signal isolation relay is connected with a power supply;

the first output end of the signal isolation relay is used for connecting the first connecting end of the reverse pulse isolation test unit;

the second output end of the signal isolation relay is connected with the ground;

the signal isolation relay is used for responding to the first pulse control signal in an electrical characteristic isolation mode and generating a second pulse control signal.

6. The batch testing device of any one of claims 4 or 5, wherein the reverse pulse isolation test unit comprises a diode, a socket bank;

the cathode of the diode is used for being connected with the first output end of the signal isolation relay;

the anode of the diode is connected with the socket bank;

the row socket is used for connecting the water-gas meter scheme board.

7. The batch test apparatus of claim 6, wherein the reverse pulse isolation test unit further comprises a mobile power supply, a current tester, a motor driver;

the mobile power supply is used for forming a power supply loop with the water-gas meter scheme board connected to the row socket;

the current tester is connected in series to the power supply loop;

the motor driver is connected with the row socket.

8. The batch test apparatus of claim 6, wherein when M reverse pulse isolation test units are connected to the output of the pulse isolation driver unit, the cathodes of the M diodes of the M reverse pulse isolation test units are connected in parallel to the first output of the signal isolation relay;

anodes of M diodes of the M reverse pulse isolation test units are connected with the row socket in the same reverse pulse isolation test unit;

wherein M is an integer greater than 1.

9. The batch test apparatus of claim 8, wherein M is an integer not exceeding 10.

10. The batch testing device of claim 1, further comprising a data acquisition unit;

the data acquisition unit is electrically connected with the reverse pulse isolation test unit;

the data acquisition unit is used for acquiring internal operation data of the water-gas surface scheme board connected with the reverse pulse isolation testing unit through a second connecting end of the reverse pulse isolation testing unit.

Technical Field

The application relates to the field of testing of intelligent water-gas meter chopping boards, in particular to a batch testing device of water-gas meter chopping boards.

Background

The narrow-band intelligent equipment is comprehensively deployed under the strong support of national policies, and the current water-gas meter industry has huge users, so that the water-gas meter as a pioneer takes the whole internet of things industry to develop rapidly. The explosive market demand requires water and gas meter manufacturing enterprises to develop and test products efficiently and quickly. Due to the limitation of installation environment, the water-gas meter must be powered by a battery, which puts high requirements on the power consumption of the chopping board (the water meter requires one 8AH battery to work for 7 years, and the gas meter requires 1.5AH battery to work for 2 years). How to make hundreds of water meters work in batches at the same time, the difference between individual scheme boards is searched, the yield of electronic components is improved, the intelligent narrow-band water-gas meter is ensured to operate without faults for many years, and the method is a pain point for water-gas meter research and development enterprises to exist for a long time. At present, the test method commonly adopted by the water-gas meter scheme board is to assemble the water-gas meter into a whole meter for testing, and also has batch test after modules are simply connected in parallel.

In the process of realizing the prior art, the inventor finds that the following technical problems exist:

the existing whole table test scheme has low test efficiency; signal crosstalk problems in batch test schemes result in incorrect metering.

Therefore, it is necessary to provide a technical solution with high testing efficiency that can perform effective batch testing on the water-gas meter solution board.

Disclosure of Invention

The embodiment of the application provides a technical scheme that water gas table scheme board is tested in batches, tests water gas table scheme board in batches through the mode of electrical isolation, can effectively improve efficiency of software testing.

The application provides a pair of batch test device of water gas table board, includes:

a pulse signal generator including an output terminal;

the pulse isolation amplifying unit comprises an input end and an output end;

the pulse isolation driving unit comprises an input end and an output end;

the reverse pulse isolation test unit comprises a first connecting end and a second connecting end;

the output end of the pulse signal generator is connected with the input end of the pulse isolation amplifying unit;

n input ends of the N pulse isolation driving units are connected with the output end of the pulse isolation amplifying unit in parallel;

the output end of at least one of the N pulse isolation driving units is connected with the first connecting end of at least 1 reverse pulse isolation testing unit;

the second connecting end of the reverse pulse isolation testing unit is used for connecting the water-gas surface pattern plate;

the pulse signal generator is used for generating and outputting a pulse signal;

the pulse isolation amplifying unit is used for receiving and amplifying the pulse signal and generating a first pulse control signal in an electrical characteristic isolation mode;

the pulse isolation driving unit is used for responding to the first pulse control signal and generating a second pulse control signal in an electrical characteristic isolation mode;

the reverse pulse isolation test unit is used for testing the water-gas surface pattern plate in a one-way electrical characteristic isolation mode according to the second pulse control signal;

wherein N is a positive integer.

Furthermore, the pulse isolation amplifying unit at least comprises a triode amplifying circuit and a signal relay;

the triode amplifying circuit comprises an input end and an output end;

the signal relay comprises an input end and an output end;

the input end of the triode amplifying circuit is connected with the output end of the pulse signal generator;

the output end of the triode amplifying circuit is connected with the input end of the signal relay;

n input ends of the N pulse isolation driving units are connected with the output end of the signal relay in a parallel connection mode;

the triode amplifying circuit is used for carrying out reverse phase processing and amplifying the received signal pulse and outputting a pulse amplifying signal;

the signal relay is used for responding to the pulse amplification signal in an electric characteristic isolation mode and generating a first pulse control signal.

Furthermore, the pulse isolation amplifying unit at least comprises a triode amplifying circuit and a signal relay;

the triode amplifying circuit comprises an input end and an output end;

the signal relay comprises an input end and an output end;

the input end of the triode amplifying circuit is connected with the output end of the pulse signal generator;

the input ends of the N signal relays are connected with the output end of the triode amplifying circuit in a parallel mode;

the output ends of the N signal relays are connected with the input ends of the N pulse isolation driving units in a one-to-one independent connection mode;

the triode amplifying circuit is used for carrying out reverse phase processing and amplifying the received signal pulse and outputting a pulse amplifying signal;

the signal relay is used for responding to the pulse amplification signal in an electric characteristic isolation mode and generating a first pulse control signal.

Further, the output end of the signal relay comprises a first output end and a second output end;

the pulse isolation driving unit comprises a current-limiting resistor and a signal isolation relay;

the signal isolation relay at least comprises a first input end, a second input end, a first output end and a second output end;

the first output end of the signal relay is connected with one end of each of the current-limiting resistors of the N pulse isolation driving units;

the second output end of the signal relay is connected with the ground;

the other end of the current-limiting resistor is connected with a first input end of the signal isolation relay in the same pulse isolation driving unit;

the second input end of the signal isolation relay is connected with a power supply;

the first output end of the signal isolation relay is used for connecting the first connecting end of the reverse pulse isolation test unit;

the second output end of the signal isolation relay is connected with the ground;

the signal isolation relay is used for responding to the first pulse control signal in an electrical characteristic isolation mode and generating a second pulse control signal.

Further, the output end of the signal relay comprises a first output end and a second output end;

the pulse isolation driving unit comprises a current-limiting resistor and a signal isolation relay;

the signal isolation relay at least comprises a first input end, a second input end, a first output end and a second output end;

the output ends of the N signal relays are connected with one ends of the current-limiting resistors of the N pulse isolation driving units in a one-to-one independent connection mode;

the second output end of the signal relay is connected with the ground;

the other end of the current-limiting resistor is connected with a first input end of the signal isolation relay in the same pulse isolation driving unit;

the second input end of the signal isolation relay is connected with a power supply;

the first output end of the signal isolation relay is used for connecting the first connecting end of the reverse pulse isolation test unit;

the second output end of the signal isolation relay is connected with the ground;

the signal isolation relay is used for responding to the first pulse control signal in an electrical characteristic isolation mode and generating a second pulse control signal.

Further, the reverse pulse isolation test unit comprises a diode and a socket bank;

the cathode of the diode is used for being connected with the first output end of the signal isolation relay;

the anode of the diode is connected with the socket bank;

the row socket is used for connecting the water-gas meter scheme board.

Furthermore, the reverse pulse isolation test unit also comprises a mobile power supply, a current tester and a motor driver;

the mobile power supply is used for forming a power supply loop with the water-gas meter scheme board connected to the row socket;

the current tester is connected in series to the power supply loop;

the motor driver is connected with the row socket.

Further, when the output end of the pulse isolation driving unit is connected with the M reverse pulse isolation test units, the cathodes of the M diodes of the M reverse pulse isolation test units are connected with the first output end of the signal isolation relay in a parallel connection manner;

anodes of M diodes of the M reverse pulse isolation test units are connected with the row socket in the same reverse pulse isolation test unit;

wherein M is an integer greater than 1.

Further, M is an integer of not more than 10.

Further, the system also comprises a data acquisition unit;

the data acquisition unit is electrically connected with the reverse pulse isolation test unit;

the data acquisition unit is used for acquiring internal operation data of the water-gas surface scheme board connected with the reverse pulse isolation testing unit through a second connecting end of the reverse pulse isolation testing unit.

The embodiment provided by the application has at least the following technical effects:

the water-gas surface pattern board is tested in batches in an electrical isolation mode, so that the testing efficiency can be effectively improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic structural diagram of a batch test apparatus for water-gas meter pattern plates according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a reverse pulse isolation test unit according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, a batch test apparatus 100 for water-gas surface pattern boards according to an embodiment of the present disclosure includes:

a pulse signal generator 11 including an output terminal;

the pulse isolation amplifying unit 12 comprises an input end and an output end;

the pulse isolation driving unit 13 comprises an input end and an output end;

the reverse pulse isolation test unit 14 comprises a first connecting end and a second connecting end;

the output end of the pulse signal generator 11 is connected with the input end of the pulse isolation amplifying unit 12;

n input ends of the N pulse isolation driving units 13 are connected in parallel with an output end of the pulse isolation amplifying unit 12;

the output end of at least one of the N pulse isolation driving units 13 is connected with the first connection end of at least 1 reverse pulse isolation testing unit 14;

the second connecting end of the reverse pulse isolation testing unit 14 is used for connecting the water-gas surface pattern plate;

the pulse signal generator 11 is used for generating and outputting a pulse signal;

the pulse isolation amplifying unit 12 is configured to receive and amplify the pulse signal, and generate a first pulse control signal in an electrical characteristic isolation manner;

the pulse isolation driving unit 13 is configured to respond to the first pulse control signal and generate a second pulse control signal in an electrical characteristic isolation manner;

the reverse pulse isolation test unit 14 is configured to test the water-gas surface pattern board in a unidirectional electrical characteristic isolation manner according to the second pulse control signal;

wherein N is a positive integer.

It is understood that the batch test apparatus 100 for water-gas meter pattern boards herein is an electronic analog array test device for water-gas pattern boards for batch test of water-gas pattern boards, and several tens to several hundreds of pattern boards can be tested in parallel. The pulse signal generator 11 is here a pulse metering simulator. In a specific implementation, the pulse signal generator 11 may be an electromechanical conversion pulse simulator of a water and gas meter, and the pulse signal generator 11 generates and outputs a pulse signal. The pulse isolation amplifying unit 12 may be configured to receive and amplify the pulse signal from the pulse signal generator 11, and generate a first pulse control signal. The pulse isolation amplifying unit 12 and the pulse isolation driving unit 13 are connected in such a manner that the electrical characteristics are completely isolated. The pulse isolation driving unit 13 may generate a second pulse control signal according to the first pulse control signal. The pulse isolation driving unit 13 is electrically isolated from the reverse pulse isolation testing unit 14. The reverse pulse isolation test unit 14 may test the water and gas surface board in a unidirectional electrical characteristic isolation manner according to the second pulse control signal. It is apparent that when N pulse isolation driving units 13 are connected to a single pulse isolation amplifying unit 12, they are all connected to the output terminal of the pulse isolation amplifying unit 12 in a parallel manner. In a specific implementation process, N here needs to be determined according to an actual test condition. It should be noted that, by using the testing environment connected in parallel in the electrical characteristic isolation manner, the problem of abnormal testing data caused by mutual crosstalk between the testing lines can be effectively solved.

Specifically, in a preferred embodiment provided by the present application, the pulse isolation amplifying unit 12 at least includes a triode amplifying circuit and a signal relay;

the triode amplifying circuit comprises an input end and an output end;

the signal relay comprises an input end and an output end;

the input end of the triode amplifying circuit is connected with the output end of the pulse signal generator 11;

the output end of the triode amplifying circuit is connected with the input end of the signal relay;

the N input ends of the N pulse isolation driving units 13 are connected in parallel with the output end of the signal relay;

the triode amplifying circuit is used for carrying out reverse phase processing and amplifying the received signal pulse and outputting a pulse amplifying signal;

the signal relay is used for responding to the pulse amplification signal in an electric characteristic isolation mode and generating a first pulse control signal.

It is understood that the triode amplifying circuit can be used for signal amplification, a triode is arranged in the triode amplifying circuit, and the signal relay can be understood as a relay. The pulse output by the pulse signal generator 11 can be reversed by 180 degrees by utilizing the reversing function of the triode and current amplification is carried out, then the signal is used for driving a signal relay in the pulse isolation amplifying unit 12, and the N pulse isolation driving units 13 connected in parallel at the next stage are in a completely isolated state with the pulse isolation amplifying unit 12 in terms of electrical characteristics. It should be noted that the output terminal of the signal relay is simultaneously connected to the input terminals of the N pulse isolation driving units 13, and the N pulse isolation driving units 13 are connected in parallel. Obviously, the signal relay can eliminate excitation noise generated by parallel connection and also can eliminate signal crosstalk when the parallel circuit works.

Further, in a preferred embodiment provided by the present application, the pulse isolation amplifying unit 12 at least includes a triode amplifying circuit and a signal relay;

the triode amplifying circuit comprises an input end and an output end;

the signal relay comprises an input end and an output end;

the input end of the triode amplifying circuit is connected with the output end of the pulse signal generator 11;

the input ends of the N signal relays are connected with the output end of the triode amplifying circuit in a parallel mode;

the output ends of the N signal relays are connected with the input ends of the N pulse isolation driving units 13 in a one-to-one independent connection manner;

the triode amplifying circuit is used for carrying out reverse phase processing and amplifying the received signal pulse and outputting a pulse amplifying signal;

the signal relay is used for responding to the pulse amplification signal in an electric characteristic isolation mode and generating a first pulse control signal.

It is understood that the triode amplifying circuit can be used for signal amplification, a triode is arranged in the triode amplifying circuit, and the signal relay can be understood as a relay. The output pulse of the pulse signal generator 11 can be inverted by 180 degrees by using the inverting function of the triode and current amplification is performed, and then the signal is used for driving N signal relays in the pulse isolation amplifying unit 12. The output ends of the N signal relays are individually connected to the input ends of the N pulse isolation driving units 13 of the next stage in a one-to-one manner, so that the pulse isolation driving units 13 and the pulse isolation amplifying units 12 are completely isolated in electrical characteristics. It should be noted that N input terminals of the signal relay are connected in parallel with the output terminal of the triode amplifier circuit, so as to implement parallel connection between the N pulse isolation driving units 13.

Further, in a preferred embodiment provided by the present application, the output terminal of the signal relay includes a first output terminal, a second output terminal;

the pulse isolation driving unit 13 comprises a current-limiting resistor and a signal isolation relay;

the signal isolation relay at least comprises a first input end, a second input end, a first output end and a second output end;

the first output end of the signal relay is connected with one end of each current-limiting resistor of the N pulse isolation driving units 13;

the second output end of the signal relay is connected with the ground;

the other end of the current-limiting resistor is connected with a first input end of the signal isolation relay in the same pulse isolation driving unit 13;

the second input end of the signal isolation relay is connected with a power supply;

the first output end of the signal isolation relay is used for connecting the first connection end of the reverse pulse isolation test unit 14;

the second output end of the signal isolation relay is connected with the ground;

the signal isolation relay is used for responding to the first pulse control signal in an electrical characteristic isolation mode and generating a second pulse control signal.

It is understood that the signal isolation relay can be a specific type of relay according to actual implementation. In a specific implementation, N may be assumed to be 10. The first output end of the signal relay is connected with one end of the current-limiting resistor of 10 pulse isolation driving units 13 at the same time. And the second output end of the signal relay is connected with the ground. The other ends of the current-limiting resistors of the 10 pulse isolation driving units 13 are respectively connected with a first input end of a signal isolation relay in the same pulse isolation driving unit 13, and a second input end of the signal isolation relay is connected with a power supply. At this time, 10 pulse isolation driving units 13 are connected in parallel to the output terminals of the signal relays, respectively. The pulse isolation driving unit 13 and the pulse isolation amplifying unit 12 are completely isolated in electrical characteristics, and mutual interference of signals between parallel circuits is reduced.

Specifically, in a preferred embodiment provided by the present application, the output terminal of the signal relay includes a first output terminal and a second output terminal;

the pulse isolation driving unit 13 comprises a current-limiting resistor and a signal isolation relay;

the signal isolation relay at least comprises a first input end, a second input end, a first output end and a second output end;

the output ends of the N signal relays are connected with one ends of the current-limiting resistors of the N pulse isolation driving units 13 in a one-to-one independent connection manner;

the second output end of the signal relay is connected with the ground;

the other end of the current-limiting resistor is connected with a first input end of the signal isolation relay in the same pulse isolation driving unit 13;

the second input end of the signal isolation relay is connected with a power supply;

the first output end of the signal isolation relay is used for connecting the first connection end of the reverse pulse isolation test unit 14;

the second output end of the signal isolation relay is connected with the ground;

the signal isolation relay is used for responding to the first pulse control signal in an electrical characteristic isolation mode and generating a second pulse control signal.

It is understood that the signal isolation relay can be a specific type of relay according to actual implementation. In a specific implementation, N may be assumed to be 10. There are 10 signal relays and 10 pulse isolation drive units 13. 1 signal relay in 10 signal relays is connected with 1 pulse isolation driving unit 13 in 10 pulse isolation driving units 13, and 10 groups of circuits with the same connection can be obtained. In each group of circuits, a first output end of the signal relay is connected with one end of a current-limiting resistor of the pulse isolation driving unit 13, and a second output end of the signal relay is connected with the ground. The other end of the current-limiting resistor is connected with a first input end of a signal isolation relay in the same pulse isolation driving unit 13, and a second input end of the signal isolation relay is connected with a power supply. At this time, 10 signal relays and 10 pulse isolation driving units 13 are connected in parallel to the output terminals of the triode amplification circuit, respectively. The pulse isolation driving unit 13 and the pulse isolation amplifying unit 12 are completely isolated in electrical characteristics, and mutual interference of signals between parallel circuits is reduced.

Further, in a preferred embodiment provided herein, the reverse pulse isolation test unit 14 includes a diode, a socket bank;

the cathode of the diode is used for being connected with the first output end of the signal isolation relay;

the anode of the diode is connected with the socket bank;

the row socket is used for connecting the water-gas meter scheme board.

Note that the diode here may be a schottky diode. The cathode of the diode is connected with the output end of the primary signal, namely the first output end of the signal isolation relay. The anode of the diode is connected with the socket bank. It can be understood that the socket array is convenient for the replacement of the tested scheme board, is also convenient for the batch test of the scheme boards with different types and different communication modes, and can achieve the purpose of high-efficiency and low-cost test. When a certain water-gas meter scheme board is tested, the water-gas meter scheme board can periodically detect the contact state of the signal isolation relay. When the contact state of the signal isolation relay is detected, the water-gas meter scheme board can output a pull-up level lasting 20uS, and the pull-up level can be transmitted to the anode of the diode on the line through the socket. When the contact of the signal isolation relay is closed, the closed impedance between the first output end and the second output end of the signal isolation relay can be regarded as 0, the level of the anode of the diode is higher than that of the cathode, and the diode is conducted. When the signal isolating relay contact is open, the closed impedance between the first output terminal and the second output terminal of the signal isolating relay can be considered to be infinite. At this time, the circuit in which the diode is located cannot form an electric circuit for allowing current to flow, and the diode is turned off. According to the two states, the purpose of detecting whether the signal isolation relay contact is closed or not can be achieved. When the water and gas meter board does not check the contact state of the signal isolation relay, the water and gas meter board outputs low level to the anode of the diode through the socket bank, the cathode level of the diode is higher than or equal to the anode level, and the diode is in a cut-off state. The diodes in the cut-off state can reduce the interference influence of the diodes in other reverse pulse isolation test units 14 on the detection of the contact state of the same signal isolation relay, thereby reducing the problem of false detection.

Specifically, in a preferred embodiment provided herein, referring to fig. 2, the reverse pulse isolation test unit 14 further includes a mobile power supply, a current tester, and a motor driver;

the mobile power supply is used for forming a power supply loop with the water-gas meter scheme board connected to the row socket;

the current tester is connected in series to the power supply loop;

the motor driver is connected with the row socket.

It can be understood that the water-gas meter scheme board is generally powered by a battery, and has the characteristic of low power consumption. In a specific implementation process, the mobile power supply can adopt a common 3.6V-6V battery. The current tester can adopt a uA-level ammeter to realize the measurement of accurate current data and the energy consumption of the test scheme board under various conditions. The electrode driver can adopt a motor driver of a water-gas meter valve to simulate a real water/gas meter with a valve control function.

Further, in a preferred embodiment provided by the present application, when the output terminal of the pulse isolation driving unit 13 is connected to M reverse pulse isolation testing units 14, the cathodes of M diodes of the M reverse pulse isolation testing units 14 are connected in parallel to the first output terminal of the signal isolation relay;

the anodes of the M diodes of the M reverse pulse isolation test units 14 are connected to the socket bank in the same reverse pulse isolation test unit 14;

wherein M is an integer greater than 1.

It is understood that, in order to improve the test efficiency, the output terminal of the pulse isolation driving unit 13 may be directly connected to the plurality of reverse pulse isolation test units 14. In a specific implementation, the M reverse pulse isolation test units 14 are independent from each other. Each reverse pulse isolation test unit 14 may perform a single water and gas surface pattern board test. Each reverse pulse isolation test unit 14 is connected to the first output terminal of the signal isolation relay via the cathode of its own diode. The M reverse pulse isolation test units 14 are connected in parallel with the single pulse isolation drive unit 13 as a whole.

Specifically, in a preferred embodiment provided herein, M is an integer not exceeding 10.

It can be understood that the water-gas meter scheme boards tested in parallel need to be controlled in a certain number to prevent the scheme boards from being connected in parallel too much to cause signal crosstalk. In the specific implementation process, a great number of test experiments show that when the value of M is not more than 10, a better test effect can be obtained.

Further, in a preferred embodiment provided by the present application, the system further includes a data acquisition unit;

the data acquisition unit is electrically connected with the reverse pulse isolation test unit 14;

the data acquisition unit is used for acquiring the internal operation data of the water-gas surface scheme board connected with the reverse pulse isolation test unit 14 through the second connecting end of the reverse pulse isolation test unit 14.

It will be appreciated that during the batch testing of water and gas surface pattern boards, a significant amount of test data is generated. The collection and analysis of the test data can provide corresponding data support for planning, adjusting and optimizing the test work. In a specific implementation process, the data acquisition unit can be a computer, an intelligent mobile terminal or an integrated device for realizing a data acquisition function through a single chip microcomputer.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.