Low-current branch identification module test tool system

Abstract

The invention relates to the technical field of small current identification, in particular to a small current branch identification module test tool system, which comprises a first live wire and a first null line, and is characterized in that the output ends of the first live wire and the first null line are electrically connected with a tested module, and the first live wire and the first null line are used for power supply of a test tool; the output end of the first live wire is electrically connected with a tool mainboard module. According to the invention, data of a signal is analyzed through a computing chip, a tool mainboard module transmits the data to an upper computer module through a communicator, the upper computer module receives the data of the tool mainboard module and carries out data judgment, and if so, the detection is qualified; according to the method, due to the fact that the switching current is determined, it is guaranteed that the value of the current is constant all the time, the obtained judgment result is accurate, multiple times of detection are not needed to make the judgment result accurate, and the detection efficiency of small current signals is improved.

Description

Technical Field

[0001] The invention relates to the technical field of small current identification, and in particular to a small current branch identification module testing tooling system. Background Art

[0002] The identification of the substation in the HPLC communication unit uses small current signal detection technology and power carrier communication to identify the substation branches. The method includes a disturbance loading step and a disturbance detection step, and includes the following functions: The central node controls the target branch node to send a disturbance current signal, the branch node detects the disturbance current signal, and sends the detection result to the central node, and the central node calculates the topological structure of the station area to be tested according to the detection result.

[0003] The existing technical solution designs an algorithm for collecting current, collects the current on the L and N power lines, and calculates whether the current is within the calculated theoretical current value range. If it is within the range, it is judged to be qualified; if not, it is judged to be unqualified. The judgment result obtained by this method is relatively inaccurate, and multiple tests are required to accurately determine the result, which reduces the detection efficiency of small current signals. Summary of the invention

[0004] To this end, the present invention provides a small current branch identification module testing tooling system to solve the above-mentioned problems.

[0005] The present invention provides the following technical solution: a small current branch identification module test tool system, comprising a first live wire and a first neutral wire, the output ends of the first live wire and the first neutral wire are electrically connected to a module under test, and the first live wire and the first neutral wire are used for power supply of the test tool; The output end of the first live wire is electrically connected to the tooling mainboard module, and the tooling mainboard module is used to measure the effective value of each phase current and voltage, power factor, frequency, and phase parameters. The receiving end of the tooling mainboard module is electrically connected to the second live wire, and the receiving end of the tooling mainboard module is electrically connected to the second neutral wire. The second live wire and the second neutral wire are used to power the tooling mainboard module board.

[0006] As a preferred solution of the present invention, the tooling mainboard module also includes a metering chip, the collection end of the metering chip is electrically connected to the output end of the first live wire, the output end of the first neutral wire is electrically connected to the collection end of the metering chip, the output ends of the second live wire and the second neutral wire are both electrically connected to the receiving end of the metering chip, the second live wire and the second neutral wire are used for powering the metering chip, the output ends of the first live wire and the first neutral wire are electrically connected to the metering controller module, and the metering chip is used to collect electrical signals transmitted by the first live wire and the first neutral wire.

[0007] As a preferred solution of the present invention, the output end of the metering chip is electrically connected to a serial peripheral interface, the output end of the serial peripheral interface is electrically connected to a transmission line, the output end of the transmission line is electrically connected to a computing chip, the output ends of the second live wire and the second neutral wire are electrically connected to a receiving end of the serial peripheral interface, the second live wire and the second neutral wire are used for power supply of the serial peripheral interface, the output ends of the second live wire and the second neutral wire are electrically connected to the receiving end of the computing chip, the second live wire and the second neutral wire are used for power supply of the computing chip, and the output end of the copy controller module is electrically connected to a communicator.

[0008] As a preferred solution of the present invention, the output end of the computing chip is electrically connected to a communicator, the output end of the communicator is electrically connected to a host computer module, the output end of the host computer module is electrically connected to a receiving end of the communicator, and the output end of the communicator is electrically connected to a receiving end of the copy controller module.

[0009] As a preferred solution of the present invention, the chip model of the metering chip is a V three-phase metering chip, and the metering chip is used to provide active power, reactive power, apparent power, active energy and reactive energy of the combined phase and each phase, and the metering chip is used to measure the effective value of current and voltage of each phase, power factor, frequency, and phase parameters.

[0010] As a preferred solution of the present invention, the chip model of the computing chip is an M main chip, the computing chip is used to collect information collected by the metering chip, and the computing chip is used to analyze the information collected by the metering chip.

[0011] As a preferred solution of the present invention, the copy controller module is used to detect whether the module under test is in place.

[0012] As a preferred solution of the present invention, the tooling mainboard module supports the display interface standard.

[0013] As a preferred solution of the present invention, the tooling mainboard module supports the display interface standard.

[0014] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the copy controller module sends an HPLC carrier signal to the module under test through the first live wire and the first neutral wire, and starts to perform a small current function test. Since the current of the first live wire is continuously switched on and off, the metering circuit inside the tooling mainboard module detects the change of the current and automatically identifies the waveform of the small current. The waveform signal is transmitted from the transmission line to the computing chip in the tooling mainboard module through the internal serial peripheral interface. The computing chip parses the data of the signal. The tooling mainboard module transmits the data to the host computer module through the communicator. The host computer module receives the data of the tooling mainboard module and performs data judgment. If yes, the detection is qualified; if not, the detection is unqualified. Since the current of the first live wire 3 is continuously switched on and off at 833HZ, the current value is always guaranteed to be constant. The obtained judgment result is accurate, the error is within the tolerance range, and multiple detections are not required to accurately determine the result, thereby improving the detection efficiency of the small current signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a flow chart of the overall structure system of the present invention; Figure 2 This is a flow chart of the tooling mainboard module system in the present invention.

[0016] In the figure: 1, the second live wire; 2, the second neutral wire; 3, the first live wire; 4, the first neutral wire; 5, the host computer module; 6, the 485 communicator; 7, the 232 communicator; 8, the module under test; 9, the tooling mainboard module; 10, the copy controller module; 901, the metering chip; 902, the serial peripheral interface; 903, the transmission line; 904, the computing chip. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-2 The technical solution provided by the present invention specifically includes the following embodiments: Embodiment 1: A small current branch identification module test tooling system, including a first live wire 3 and a first neutral wire 4, the output ends of the first live wire 3 and the first neutral wire 4 are electrically connected to a module under test 8, and the first live wire 3 and the first neutral wire 4 are used to power the test tooling; L1 represents the first live wire 3, and N1 represents the first neutral wire 4; the output end of the first live wire 3 is electrically connected to a tooling mainboard module 9, and the tooling mainboard module 9 is used to measure the effective value of each phase current and voltage, power factor, frequency, and phase parameters, the receiving end of the tooling mainboard module 9 is electrically connected to the second live wire 1, and the receiving end of the tooling mainboard module 9 is electrically connected to the second neutral wire 2, and the second live wire 1 and the second neutral wire 2 are used to power the tooling mainboard module 9 board; the tooling mainboard module 9 supports the display interface standard; The tooling mainboard module 9 also includes a metering chip 901, the collection end of the metering chip 901 is electrically connected to the output end of the first live wire 3, the output end of the first zero line 4 is electrically connected to the collection end of the metering chip 901, the output ends of the second live wire 1 and the second zero line 2 are both electrically connected to the receiving end of the metering chip 901, the second live wire 1 and the second zero line 2 are used for power supply of the metering chip 901, the output ends of the first live wire 3 and the first zero line 4 are electrically connected to the metering controller module 10, and the metering chip 901 is used to collect the electrical signals transmitted by the first live wire 3 and the first zero line 4; the output end of the metering chip 901 is electrically connected There is a serial peripheral interface 902, the output end of the serial peripheral interface 902 is electrically connected to a transmission line 903, the output end of the transmission line 903 is electrically connected to a computing chip 904, the output ends of the second live wire 1 and the second neutral wire 2 are electrically connected to the receiving end of the serial peripheral interface 902, the second live wire 1 and the second neutral wire 2 are used for power supply of the serial peripheral interface 902, the output ends of the second live wire 1 and the second neutral wire 2 are electrically connected to the receiving end of the computing chip 904, the second live wire 1 and the second neutral wire 2 are used for power supply of the computing chip 904, and the output end of the copy controller module 10 is electrically connected to a 232 communicator 7; The tooling mainboard module 9, the copy controller module 10 and the upper computer module are inserted into the module under test 8 and the electric meter, and the HPLC power carrier communication principle is utilized to fully simulate the real application scenario on site. The copy controller module 10 utilizes the carrier communication of HPLC to transmit the carrier information. The tooling mainboard module 9 utilizes the metering circuit to collect the small current characteristic signal, and utilizes the Fourier transform algorithm to decode the small current characteristic signal. At the same time, a combination of the power line current metering function and the Fourier algorithm decoding function is designed. There are multiple stable communication channels, reliable collection and calculation modules and judgment mechanisms, and it has the advantages of stability, low cost and high efficiency.

[0019] The output end of the computing chip 904 is electrically connected to the 485 communicator 6, the output end of the 485 communicator 6 is electrically connected to the host computer module 5, the output end of the host computer module 5 is electrically connected to the receiving end of the 232 communicator 7, and the output end of the 232 communicator 7 is electrically connected to the receiving end of the copy control module 10; the chip model of the metering chip 901 is a V9203 three-phase metering chip, the metering chip 901 is used to provide the active power, reactive power, apparent power, active energy and reactive energy of the combined phase and each phase, and the metering chip 901 is used to measure the effective value of the current and voltage of each phase, the power factor, frequency, and phase parameters; the chip model of the computing chip 904 is an M481 main chip, the computing chip 904 is used to collect information collected by the metering chip 901, and the computing chip 904 is used to analyze the information collected by the metering chip 901; the copy control module 10 is used to detect whether the module 8 under test is in place; The upper computer module 5 sends a signal to the copy controller module 10 through the 232 communicator 7 to detect whether the module under test 8 is in place. The copy controller module 10 continuously sends an HPLC carrier signal to detect the module under test 8 through the first live wire 3 and the first neutral wire 4. If the copy controller module 10 detects that the module under test 8 is not in place, the upper computer module 5 sends a command to the copy controller module 10 to detect whether the module under test 8 is in place. When the copy controller module 10 detects that the module under test 8 is in place, the copy controller module 10 responds to the upper computer module 5 through the 232 communicator 7 that the module under test 8 is in place. The upper computer module 5 sends an instruction to the copy controller module 10 through the 232 communicator 7 to start a small current function test. The copy controller module 10 sends an HPLC carrier signal to the module under test 8 through the first live wire 3 and the first neutral wire 4 to start a small current function test. Current function test, since the current of the first live wire 3 is constantly switched on and off, the metering circuit inside the tooling mainboard module 9 detects the change in current and automatically identifies the waveform of the small current. The waveform signal is transmitted from the transmission line 903 to the computing chip 904 in the tooling mainboard module 9 through the internal serial peripheral interface 902. The computing chip 904 parses the data of the signal, and the tooling mainboard module 9 transmits it to the upper computer module 5 through the 485 communicator 6. The upper computer module 5 receives the data from the tooling mainboard module 9 and makes a data judgment. If yes, the test is qualified; if not, the test is unqualified. Since the switching current is determined in this method, the current value is always guaranteed to be constant, and the judgment result is accurate. There is no need for multiple tests to accurately judge the result, which improves the detection efficiency of the small current signal.

[0020] In this scheme, a small current branch identification module test fixture system is working. When the host computer module 5 clicks to start the test, the host computer module 5 sends a signal to the copy controller module 10 through the 232 communicator 7 to detect whether the module under test 8 is in place. The copy controller module 10 continuously sends HPLC carrier signals to detect the module under test 8 through the first live wire 3 and the first neutral wire 4. If the copy controller module 10 detects that the module under test 8 is not in place, the host computer module 5 sends a command to the copy controller module 10 to detect whether the module under test 8 is in place at intervals of 500ms until the detection is successful, and then proceeds to the next step. When the copy controller module 10 detects that the module under test 8 is in place, the copy controller module 10 responds to the host computer module 5 through the 232 communicator 7, and the module under test is Module 8 is in place, the upper computer module 5 informs the tooling main board module 9 through the 485 communicator 6 to prepare to detect the small current signal, and the upper computer module 5 sends an instruction to the copy controller module 10 through the 232 communicator 7 to start the small current function test with a frequency of 833HZ and data of AAE9. The copy controller module 10 sends the HPLC carrier signal to the module under test 8 through the first live wire 3 and the first zero wire 4, and the module under test 8 is required to generate a frequency of 833HZ and data of AAE9 signal. The AAE9 signal is generated by the small current circuit of the module under test 8 switching current at a frequency of 833HZ. At this time, the small current function test starts. Since the current of the first live wire 3 is continuously switched at 833HZ, the tooling main board module 9 starts to detect the small current signal. The metering circuit inside the board module 9 detects the change of current and automatically identifies the waveform of the small current. The waveform signal is transmitted from the transmission line 903 to the computing chip 904 in the tooling mainboard module 9 through the internal serial peripheral interface 902. The computing chip 904 receives the waveform signal and performs Fourier transform to parse the signal data. The tooling mainboard module 9 transmits it to the host computer module 5 through the 485 communicator 6. The host computer module 5 receives the data of the tooling mainboard module 9 and determines whether it is AAE9 data. If so, the test is qualified; if not, the test is unqualified. The tooling mainboard module 9, the copy controller module 10 and the host computer module are plugged into the module under test 8 and the electric meter, and HPLC power carrier communication is used. The principle fully simulates the real application scenario on site. The copy controller module 10 uses the carrier communication of HPLC to transmit the carrier information. The tooling mainboard module 9 uses the metering circuit to collect the small current characteristic signal, and uses the Fourier transform algorithm to decode the small current characteristic signal, and transmits it to the host computer module 5. The host computer module 5 judges the signal and adopts the traditional communication method of 485 communicator 6 and 232 communicator 7 plus the power carrier communication method of HPLC. In addition, a combination of power line current metering function and Fourier algorithm decoding function is designed. There are multiple stable communication channels, reliable collection and calculation modules and judgment mechanisms, which have the advantages of stability, low cost and high efficiency.

Claims

1. A small current branch identification module test tooling system, characterized by: It comprises a first live wire (3) and a first neutral wire (4), the output ends of the first live wire (3) and the first neutral wire (4) are electrically connected to a module under test (8), and the first live wire (3) and the first neutral wire (4) are used for powering the test tool; The output end of the first live wire (3) is electrically connected to a tooling mainboard module (9), and the tooling mainboard module (9) is used to measure the effective value of each phase current and voltage, power factor, frequency, and phase parameters; the receiving end of the tooling mainboard module (9) is electrically connected to a second live wire (1), and the receiving end of the tooling mainboard module (9) is electrically connected to a second neutral wire (2); the second live wire (1) and the second neutral wire (2) are used to supply power to a board of the tooling mainboard module (9).

2. A small current branch identification module test fixture system according to claim 1, characterized in that: The tooling mainboard module (9) further comprises a metering chip (901); a collection end of the metering chip (901) is electrically connected to an output end of the first live wire (3); an output end of the first neutral wire (4) is electrically connected to the collection end of the metering chip (901); output ends of the second live wire (1) and the second neutral wire (2) are both electrically connected to a receiving end of the metering chip (901); the second live wire (1) and the second neutral wire (2) are used to supply power to the metering chip (901); output ends of the first live wire (3) and the first neutral wire (4) are electrically connected to a metering controller module (10); and the metering chip (901) is used to collect electrical signals transmitted by the first live wire (3) and the first neutral wire (4).

3. A small current branch identification module test fixture system according to claim 2, characterized in that: The output end of the metering chip (901) is electrically connected to a serial peripheral interface (902), the output end of the serial peripheral interface (902) is electrically connected to a transmission line (903), the output end of the transmission line (903) is electrically connected to a computing chip (904), the output ends of the second live wire (1) and the second neutral wire (2) are electrically connected to a receiving end of the serial peripheral interface (902), the second live wire (1) and the second neutral wire (2) are used for powering the serial peripheral interface (902), the output ends of the second live wire (1) and the second neutral wire (2) are electrically connected to a receiving end of the computing chip (904), the second live wire (1) and the second neutral wire (2) are used for powering the computing chip (904), and the output end of the metering controller module (10) is electrically connected to a 232 communicator (7).

4. A small current branch identification module test fixture system according to claim 3, characterized in that: The output end of the computing chip (904) is electrically connected to a 485 communicator (6), the output end of the 485 communicator (6) is electrically connected to a host computer module (5), the output end of the host computer module (5) is electrically connected to a receiving end of the 232 communicator (7), and the output end of the 232 communicator (7) is electrically connected to a receiving end of the copy control module (10).

5. A small current branch identification module test fixture system according to claim 2, characterized in that: The chip model of the metering chip (901) is a V9203 three-phase metering chip. The metering chip (901) is used to provide active power, reactive power, apparent power, active energy and reactive energy of the combined phase and each phase. The metering chip (901) is used to measure the effective value of current and voltage, power factor, frequency and phase parameters of each phase.

6. A small current branch identification module test fixture system according to claim 3, characterized in that: The chip model of the computing chip (904) is an M481 main chip. The computing chip (904) is used to collect information collected by the metering chip (901). The computing chip (904) is used to analyze the information collected by the metering chip (901).

7. A small current branch identification module test fixture system according to claim 3, characterized in that: The control module (10) is used to detect whether the module under test (8) is in place.

8. The small current branch identification module test fixture system according to claim 1, characterized in that: The tooling mainboard module (9) supports the display interface standard.

Images