Capacitor leakage current parameter testing device and automatic testing method thereof

Abstract

The invention provides a capacitor leakage current parameter testing device and an automatic testing method thereof. The capacitor leakage current parameter testing device comprises a cabinet body; a partition plate is arranged at one end in the cabinet body, a control panel is installed on the partition plate, a leakage current tester is placed at one end of the top of the cabinet body, a clamp plate is fixedly installed at the other end of the top of the cabinet body, a display panel is further fixed to one edge of the top of the cabinet body, and an emergency stop button, a state indicator lamp, a display screen and a start-stop button are installed on the display panel. The clamp plate, the leakage current tester, the scram button, the state indicating lamp, the display screen and the start-stop button are connected with the control panel through wires. A large number of capacitors can be automatically tested at the same time, the capacitors are static rotary tables in the testing process, the situation that testing is inaccurate due to incomplete line contact is avoided, and the situation that products are impacted due to incomplete discharging is avoided.

Description

Technical Field

[0001] The invention relates to a capacitor leakage current parameter testing device and an automatic testing method thereof. Background Art

[0002] The existing leakage current test method of fully sealed solid electrolyte tantalum capacitors is to test one by one manually. During the test, the instrument measurement parameter results need to be observed. At the same time, the position of the fixture measurement terminal needs to be constantly switched by hand based on experience, and the serial number corresponding to the unqualified product needs to be manually recorded during the test. This mode and its test of operating experience are very likely to lead to missed or mismeasured tests. For example, the multi-stage graded test process of the fully automatic aging machine disclosed in CN108490287A is to place the capacitor on a rack, and after aging, it is cooled, charged, and discharged in a flowing manner in sequence. Then, the measuring probe is used to contact the conductive brush of the fixture of the capacitor on the rack to form a measurement loop. At the same time, the position sensor senses the rack and sends a signal to the PLC control terminal, which sends a measurement instruction to the tester through the PLC control terminal. However, its charging, discharging, and measuring process can only connect one capacitor at a time, making its aging test process too slow, affecting production efficiency. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a capacitor leakage current parameter testing device and an automatic testing method thereof.

[0004] The present invention is implemented through the following technical solutions.

[0005] The present invention provides a capacitor leakage current parameter testing device and an automatic testing method thereof, comprising a cabinet; a partition is provided at one end of the cabinet, a control board is installed on the partition, a leakage current tester is placed at one end of the top of the cabinet, and a fixture board is fixedly installed at the other end; a display panel is also fixed at one edge of the top of the cabinet, and an emergency stop button, a status indicator light, a display screen, and a start-stop button are installed on the display panel; the fixture board, the leakage current tester, the emergency stop button, the status indicator light, the display screen, and the start-stop button are all connected to the control board through wires.

[0006] The fixture board includes a P counter CB board, on which a plurality of tantalum capacitor fixtures are arranged in a matrix, and a plurality of horizontal circuits and vertical circuits are processed on the P counter CB board to connect the positive end of each column of fixtures and the negative end of each row of fixtures respectively.

[0007] The plurality of horizontal lines and vertical lines are all connected with relays correspondingly, and the relays are installed on the control board.

[0008] A discharge relay is also provided to connect the discharge resistor.

[0009] The number of the status indicator lights corresponds to the number of relays, and the normally open contact of each relay is connected to a status indicator light respectively.

[0010] A method for automatically measuring capacitor leakage parameters, comprising the following steps:

[0011] ① Start button X0, and control counter C0 through intermediate relay M34 to turn on and off the first positive cycle;

[0012] ② After the first positive cycle is completed, the counter C1 is started according to the falling edge of the intermediate relay M31 to turn on and off the second column and the second positive cycle, and the counter C0 is reset to 0 at the same time, so that the relay Y32 controlling the first column is disconnected;

[0013] ③ After the second positive cycle program is completed, the counter C2 is started according to the falling edge of the intermediate relay M31 to turn on and off the third column and the third positive cycle, and the counter C1 is reset to 0 at the same time, so that the relay Y33 controlling the second column is disconnected;

[0014] ④ After the third positive cycle program is completed, the counter C3 is started according to the falling edge of the intermediate relay M31 to turn on and off the fourth column and the fourth positive cycle, and the counter C2 is reset to 0 at the same time, so that the relay Y34 controlling the third column is disconnected;

[0015] ⑤ After the fourth positive cycle program is completed, the counter C4 is started according to the falling edge of the intermediate relay M31 to turn on and off the fourth column and the fourth positive cycle, and the counter C3 is reset to 0 at the same time, so that the relay Y34 controlling the third column is disconnected;

[0016] ⑥ After the fourth positive cycle program is completed, the counter C5 is started according to the falling edge of the intermediate relay M31 to reset all programs, and the program ends.

[0017] The process of the first positive electrode cycle to the fourth positive electrode cycle is as follows:

[0018] First, turn on the negative relay in the row, and then turn on and off the positive relays in each column of the row.

[0019] The intermediate relay M31 is activated once after each positive electrode cycle program is completed.

[0020] A button X1 is also provided as a reset and emergency stop button during program operation.

[0021] The beneficial effects of the present invention are that a large number of capacitors can be automatically tested simultaneously, and the capacitors are stationary turntables during the testing process, thereby avoiding inaccurate testing caused by incomplete contact of the lines and avoiding the impact of incomplete discharge on the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figures 2 to 13 It is the control principle diagram of the present invention;

[0024] In the figure: 1- fixture plate, 2- control panel, 3- emergency stop button, 4- status indicator light, 5- leakage current tester, 6- display screen, 7- start-stop button, 8- PLC module, 9- cabinet, 10- display panel, 11- side door, 12- partition. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0026] A capacitor leakage current parameter testing device comprises a cabinet 9; a partition 12 is provided at one end of the cabinet 9, a control board 2 is installed on the partition 12, a leakage current tester 5 is placed at one end of the top of the cabinet 9, a fixture plate 1 is fixedly installed at the other end, a display panel 10 is also fixed at one edge of the top of the cabinet 9, an emergency stop button 3, a status indicator light 4, a display screen 6, and a start-stop button 7 are installed on the display panel 10; the fixture plate 1, the leakage current tester 5, the emergency stop button 3, the status indicator light 4, the display screen 6, and the start-stop button 7 are all connected to the control board 2 through wires.

[0027] The fixture board 1 includes a P counter CB board, on which a plurality of tantalum capacitor fixtures are arranged in a matrix, and a plurality of horizontal circuits and vertical circuits are processed on the P counter CB board to connect the positive end of each column of fixtures and the negative end of each row of fixtures respectively.

[0028] The plurality of horizontal lines and vertical lines are each connected to a relay correspondingly, and the relay is installed on the control board 2 .

[0029] A discharge relay is also provided to connect the discharge resistor.

[0030] The number of the status indicator lights 4 corresponds to the number of relays, and the normally open contact of each relay is connected to a status indicator light 4 respectively.

[0031] The circuit design and test sequence are designed and the control program is written using GX WORK2 software, as shown in Table 1. The specific meanings of the symbols used in the program are as follows: ① The intermediate relays M0~M7 correspond to the Y0~Y7 row outputs, M10~M17 correspond to the Y10~Y17 row outputs, M20~M27 correspond to the Y20~Y27 row outputs, M40 and M41 correspond to the Y31 (trigger pulse) output, M42~M46 correspond to the Y32~Y36 column outputs, and M47 corresponds to the Y37 relay for discharge; ② The time relays T0~T7, T10~T17, T20~T27, T30 control the row test time; T50~T57, T 60~T67, T70~T77, T80 are timers for closing the trigger of M70, and T78 is a timer for discharge timing; ③C0~C4 control the on / off of the column, and C5 controls all positive terminal relays to be connected to the resistor at the same time during discharge; ④X0 starts the running program, and X1 stops running all programs; ⑤Y0~Y7, Y10~Y17, Y20~Y27, Y30 control the on / off of 25 rows of relays, Y31 provides 0, 1 start trigger pulse signals to the instrument, Y32~Y36 control the on / off of 5 columns of relays, and Y37 controls the relay to be connected to the other end of the resistor when discharging;

[0032] Table 1

[0033]

[0034] The implementation method of matrix thinking in the program is: ① The column (negative pole of the product) is controlled by turning on and off the counters C0~C4. When the counter C0 is started, the intermediate relay controls Y32 to close (first column), and triggers M32 to start the first cycle of the positive pole; ② After the first test is completed, the counter C1 is started according to the falling edge of M31, and C0 is reset "RST C0" after C1 is started, and Y33 is closed by the intermediate relay (second column), and M32 is triggered to start the second cycle of the positive pole; ③ After the second test is completed, the counter C2 is started according to the falling edge of M31, and C1 is reset "RST C1" after C2 is started, and Y34 is closed by the intermediate relay (third column), and M34 is triggered to start the third cycle of the positive pole; ④ After the third test is completed, the counter C3 is started according to the falling edge of M31, and C2 is reset "RST C2”, control Y35 to close through the intermediate relay (the fourth column), and trigger M35 to start the fourth cycle of the positive electrode; ⑤ After the fourth test is completed, start the counter C4 according to the falling edge of M31, and reset C3 after C4 is started "RST C3", control Y36 to close through the intermediate relay (the fifth column), and trigger M36 to start the fifth cycle of the positive electrode; After the fifth test is completed, start the counter C5 according to the falling edge of M31, and C5 is turned on to start the overall discharge.

[0035] Since M31 will be started once each time the positive program is completed, M31 is used as a mechanism to realize automatic start switching of rows and columns after the first positive program is completed. The program operation sequence is: ① Start button X0, and control C0 through intermediate relay M34 to realize the on and off of the first column and the first cycle; ② After the first positive cycle program is completed, start C1 according to the falling edge of M31 to realize the on and off of the second column and the second positive cycle, and reset C0 to 0 at the same time, so that the relay Y32 controlling the first column is disconnected; ③ After the second positive cycle program is completed, start C2 according to the falling edge of M31 to realize the on and off of the third column and the third positive cycle ④After the third positive cycle program is completed, C3 is started according to the falling edge of M31 to realize the on and off of the fourth column and the fourth positive cycle, and C2 is reset to 0 at the same time, so that the relay Y34 controlling the third column is disconnected; ⑤After the fourth positive cycle program is completed, C4 is started according to the falling edge of M31 to realize the on and off of the fourth column and the fourth positive cycle, and C3 is reset to 0 at the same time, so that the relay Y34 controlling the third column is disconnected; ⑥After the fourth positive cycle program is completed, C5 is started according to the falling edge of M31 to realize the reset of all programs, and the program ends. ⑦X1 can realize the reset and emergency stop of the program at any time.

Claims

1. A capacitor leakage current parameter testing device, comprising a cabinet (9), characterized in that: A partition (12) is provided at one end of the cabinet (9), and a control panel (2) is installed on the partition (12); a leakage current tester (5) is placed at one end of the top of the cabinet (9), and a fixture plate (1) is fixedly installed at the other end; a display panel (11) is also fixed at one edge of the top of the cabinet (9), and an emergency stop button (3), a status indicator light (4), a display screen (6), and a start / stop button (7) are installed on the display panel (11); the fixture plate (1), the leakage current tester (5), the emergency stop button (3), the status indicator light (4), the display screen (6), and the start / stop button (7) are all connected to the control panel (2) via wires.

2. The capacitor leakage current parameter testing device according to claim 1, characterized in that: The fixture board (1) comprises a P counter CB board, on which a plurality of tantalum capacitor fixtures are arranged in a matrix, and a plurality of horizontal circuits and vertical circuits are processed on the P counter CB board to respectively connect the positive end of each column of fixtures and the negative end of each row of fixtures.

3. The capacitor leakage current parameter testing device according to claim 2, characterized in that: The plurality of horizontal lines and vertical lines are each connected to a corresponding relay, and the relay is mounted on the control panel (2).

4. The capacitor leakage current parameter testing device according to claim 3, characterized in that: A discharge relay is also provided to connect the discharge resistor.

5. The capacitor leakage current parameter testing device according to claim 1, characterized in that: The number of the status indicator lights (4) corresponds to the number of relays, and the normally open contact of each relay is respectively connected to a status indicator light (4).

6. The automatic measurement method of a capacitor leakage parameter according to any one of claims 1 to 5, comprising the steps of: ① Start button X0, and control counter C0 through intermediate relay M34 to conduct the first positive cycle on and off; ② After the first positive cycle is completed, the counter C1 is started according to the falling edge of the intermediate relay M31 to turn on and off the second column and the second positive cycle, and the counter C0 is reset to 0 at the same time, so that the relay Y32 controlling the first column is disconnected; ③ After the second positive cycle program is completed, the counter C2 is started according to the falling edge of the intermediate relay M31 to turn on and off the third column and the third positive cycle, and the counter C1 is reset to 0 at the same time, so that the relay Y33 controlling the second column is disconnected; ④ After the third positive cycle program is completed, the counter C3 is started according to the falling edge of the intermediate relay M31 to turn on and off the fourth column and the fourth positive cycle, and the counter C2 is reset to 0 at the same time, so that the relay Y34 controlling the third column is disconnected; ⑤ After the fourth positive cycle program is completed, the counter C4 is started according to the falling edge of the intermediate relay M31 to turn on and off the fourth column and the fourth positive cycle, and the counter C3 is reset to 0 at the same time, so that the relay Y34 controlling the third column is disconnected; ⑥ After the fourth positive cycle program is completed, the counter C5 is started according to the falling edge of the intermediate relay M31 to reset all programs, and the program ends.

7. The automatic measurement method of a capacitor leakage parameter as claimed in claim 6, characterized in that: The process of the first positive electrode cycle to the fourth positive electrode cycle is as follows: First, turn on the negative relay in the row, and then turn on and off the positive relays in each column of the row.

8. The automatic measurement method of a capacitor leakage parameter as claimed in claim 6, characterized in that: The intermediate relay M31 is activated once after each positive electrode cycle program is completed.

9. The automatic measurement method of a capacitor leakage parameter as claimed in claim 6, characterized in that: A button X1 is also provided as a reset and emergency stop button during program operation.

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