UPS circuit board card detection device

Abstract

The present invention provides a UPS circuit board card detection device, which is powered by a 220V AC power supply and includes an instrument cabinet, a card test fixture, an oscilloscope, an oscilloscope support mechanism, a circuit control board, and a test instrument. The instrument cabinet is provided with a cabinet door, and the circuit control board and the test instrument are placed inside the cabinet door; the card test fixture is placed on the upper surface of the instrument cabinet. The board to be tested is placed on the card test fixture. The oscilloscope is fixed on the surface of the instrument cabinet through the oscilloscope support mechanism. The card test fixture includes a pin board. A plurality of test pins are vertically arranged on the pin board, and the board to be tested is placed on the pin board, and the test pins are connected to the pins of the board to be tested. After the test instrument is connected to the circuit control board, it is connected to the test pins through leads, so as to test the board to be tested. The present invention can quickly locate the fault point, improve work efficiency, be simple to operate, and reduce labor costs.

Description

Technical Field

[0001] The invention belongs to the field of electrical technology, and in particular relates to a UPS circuit board card detection device. Background Art

[0002] The AC uninterruptible power supply system (UPS) power cabinet is an important part of the low-voltage power distribution system of a nuclear power plant. It supplies power to important loads such as the DCS and reactor protection-related systems of nuclear power units, and plays a vital role in maintaining the safe and stable operation of the units. Fuqing Nuclear Power Units 1-4 have a total of more than 40 uninterruptible power supply system power cabinets, and board failures occurred several times during installation, commissioning and operation. Due to the large number of components on the board, it is difficult to quickly locate the faulty components for replacement. On-site repairs are mostly carried out by directly replacing the board, which increases the operating cost of the unit. At the same time, there is the problem of failure of the new spare parts replaced, and the lack of equipment to detect the availability of spare parts in advance prolongs the equipment failure time and threatens the safe and stable operation of the unit.

[0003] Based on the above problems, it is urgent to design a UPS circuit board card detection device. Summary of the invention

[0004] The main purpose of the present invention is to provide a UPS circuit board card detection device, which is used to detect UPS circuit board card components, quickly locate fault points and eliminate on-site equipment defects.

[0005] The technical solution adopted by the present invention is:

[0006] A UPS circuit board card detection device is powered by a 220V AC power supply and includes an instrument cabinet, a card test fixture, an oscilloscope, an oscilloscope support mechanism, a circuit control board, and a test instrument. The instrument cabinet is provided with a cabinet door, and the circuit control board and the test instrument are placed inside the cabinet door; the card test fixture is placed on the upper surface of the instrument cabinet. The board to be tested is placed on the card test fixture. The oscilloscope is fixed on the surface of the instrument cabinet through the oscilloscope support mechanism.

[0007] The board to be tested is provided with several connectors, which are wiring ports, including A13, A12, O-A3, A20, C30, A15, A17, C21, and J11-4. The board to be tested is provided with several test points, including TP1, TP2, and TP49. The board to be tested is provided with several resistors, one of which is a pin R145.

[0008] The test instruments include No. 1 DC power supply, No. 2 DC power supply, No. 3 DC power supply, computer host, signal generator and multimeter, and are all equipped with neutral wire N, live wire L and ground wire PE. The neutral wire N, live wire L and ground wire PE of No. 1 DC power supply, No. 2 DC power supply, No. 3 DC power supply, computer host, signal generator and multimeter correspond to the neutral wire N, live wire L and ground wire PE of 220V AC power supply.

[0009] The UPS circuit board card detection device is also provided with an isolation transformer, and the 220V AC power supply supplies power to the oscilloscope through the isolation transformer.

[0010] The circuit control board includes several relays.

[0011] The card test fixture includes a pin board. Multiple test pins are vertically arranged on the pin board. The board to be tested is placed on the pin board. The test pins are connected to the connectors, test points, and pins of the board to be tested. After the test instrument is connected to the circuit control board, it is connected to the test pins through the lead wires to test the board to be tested.

[0012] No. 1 DC power supply, No. 2 DC power supply and No. 3 DC power supply are all provided with two channels, namely, channel 1 and channel 2.

[0013] The positive and negative terminals of the digital multimeter 34401A are connected to the test points TP1 and TP2 on the board to be tested through relays.

[0014] The positive and negative terminals of the oscilloscope are connected to R145 and O-A3 of the board to be tested through relays respectively.

[0015] The positive and negative ends of the signal generator are connected to A20 and C30 of the board to be tested through relays respectively.

[0016] The positive and negative ends of channel 1 of DC power supply 1 are connected to A17 and C21 of the board to be tested through relays respectively.

[0017] The positive and negative ends of the second channel of the No. 1 DC power supply are connected to A15 and C21 of the board to be tested through relays respectively.

[0018] Channel 1 of DC source No. 2 is connected to the input positive and negative terminals A13 and A12 of the board to be tested through relays, and the output current amplitude is detected internally by DC source No. 2.

[0019] The positive and negative ends of the second channel of the No. 2 DC source are connected to A13 and C21 of the board to be tested through relays respectively.

[0020] The positive and negative ends of channel 1 of DC source No. 3 are connected to TP49 and J11-4 of the board to be tested through relays respectively.

[0021] The test instrument detects different fault manifestations by reading the current and output positive and negative voltages of DC source No. 2. When DC source No. 2 has no output current and the digital multimeter does not detect 3.3V output, the fault cause is one of the following: MOS tube open circuit, poor connector connection, DC source no output, or any combination thereof.

[0022] The UPS circuit board card detection device is also provided with a label printer at the bottom of the oscilloscope for printing labels, and the labels are pasted on the card to be tested to facilitate identification of whether the board card is faulty.

[0023] The UPS circuit board card detection device is also provided with a display fixing mechanism and a display, and the display is fixed on the surface of the instrument cabinet through the display fixing mechanism. The display is used to display the detection result.

[0024] The bottom four corners of the instrument cabinet of the UPS circuit board card detection device are each provided with a foot cup and a caster. The foot cup is slidably arranged on the upper part of the caster. When the UPS circuit board card detection device is moved, the foot cup is lifted to expose the caster. When the UPS circuit board card detection device needs to be fixed, the foot cup is put down and put on the outer side of the caster.

[0025] The card testing fixture is also provided with a slide rail module, a support plate, a quick pressing clamp, a connecting plate, a positioning column and a flange plate.

[0026] The positioning column is vertically arranged below the needle plate and is used for fixing the needle plate.

[0027] The support plate is arranged vertically to the upper surface of the instrument cabinet.

[0028] The slide rail module is arranged on the surface of the support plate, the quick pressing clamp is slidably installed in the slide rail module, and the flange plate is fixedly connected to the tail end of the quick pressing clamp. Connecting plates are fixedly arranged on both the front and rear sides of the flange plate. The flange plate and the connecting plate are moved downward by pressing the quick pressing clamp, so that the board to be tested and the needle plate are in close contact.

[0029] The process of using the above UPS circuit board card detection device to detect the UPS circuit board card is as follows:

[0030] The detection method of the op amp IC and its peripheral circuits is as follows: the DC source provides a regulated voltage to the op amp, the signal generator sends a sinusoidal signal to the op amp circuit, and the oscilloscope detects the output signal of the op amp circuit. The output signal includes frequency and amplitude.

[0031] The detection method of the comparator IC and its peripheral circuits is as follows: the DC source provides a regulated voltage supply to the comparator, the signal generator sends a square wave signal to the comparator circuit, and the digital multimeter detects the high and low level signals of the comparator circuit.

[0032] The detection method of the analog switch IC and its peripheral circuits is as follows: a DC source provides a regulated power supply to it, a signal generator sends a square wave signal to input into the analog switch circuit, and a digital multimeter detects the high and low level signals of the analog switch circuit.

[0033] Detection method of crystal oscillator circuit: DC source provides stable power supply to the crystal oscillator, and oscilloscope detects the oscillation frequency, amplitude and slope of the crystal oscillator circuit.

[0034] The detection method of the chip power supply current and I / O port impedance of the MCU processor is: use a DC source to power its circuit to check whether the power supply current exceeds the specification, and use a digital multimeter to perform impedance detection on the key I / O to determine whether the I / O is faulty.

[0035] The detection method of logic chips and peripheral circuits is to use a DC source to power their circuits, use a signal generator to input a specific waveform, and detect whether the output signal of the logic circuit is within the specification range.

[0036] The technical effects of the present invention are as follows:

[0037] 1. It can quickly locate the fault point, is easy to operate, saves manpower and reduces labor costs;

[0038] 2. By introducing a switching relay, one instrument can provide signals and detect different test points;

[0039] 3. Through self-selected detection methods: signal injection, substitution, parameter testing, waveform observation, etc., targeted maintenance detection can be achieved, and functional analysis, failure mode analysis, input and output pin analysis, performance testing and test data analysis of the board can be completed.

[0040] 4. Improve the reliability of nuclear power unit operation and avoid repeated maintenance due to spare parts problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of a UPS circuit board card detection device;

[0042] Figure 2 This is a structural diagram of the card test fixture;

[0043] Figure 3 It is a schematic diagram for connecting power supply and test instrument;

[0044] Figure 4 This is a connection diagram between the test instrument, the board under test, and the relay.

[0045] Among them: 1 is an oscilloscope support mechanism; 2 is an oscilloscope; 3 is a label printer; 4 is a cabinet door; 5 is a caster; 6 is a foot cup; 7 is a card test fixture; 8 is a display; 9 is a display fixing mechanism; 10 is an instrument cabinet; 11 is a circuit control board; 12 is a test instrument; 13 is a slide rail module; 14 is a support plate; 15 is a needle plate; 16 is a test needle; 17 is a quick crimping clamp; 18 is a connecting plate; 19 is a positioning column; 20 is a flange plate; 34401A is a digital multimeter; V1CH1 is the first channel of No. 1 DC power supply; V1CH2 is the second channel of No. 1 DC power supply; V2CH1 is the first channel of No. 2 DC source; V2CH2 is the second channel of No. 2 DC source; V3CH1 is the first channel of No. 3 DC source. DETAILED DESCRIPTION

[0046] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] like Figure 1-4 The present invention provides a UPS circuit board card detection device, which is powered by a 220V AC power supply and includes an instrument cabinet 10, a card test fixture 7, an oscilloscope 2, an oscilloscope support mechanism 1, a circuit control board 11, and a test instrument 12. The instrument cabinet 10 is provided with a cabinet door 4, and the circuit control board 11 and the test instrument 12 are both placed in the cabinet door 4; the card test fixture 7 is placed on the upper surface of the instrument cabinet 10. The board to be tested is placed on the card test fixture 7. The oscilloscope 2 is fixed on the surface of the instrument cabinet 10 through the oscilloscope support mechanism 1.

[0048] The UPS circuit board card detection device is also provided with an isolation transformer, and the 220V AC power supply supplies power to the oscilloscope through the isolation transformer.

[0049] The board to be tested is provided with several connectors, which are wiring ports, including A13, A12, O-A3, A20, C30, A15, A17, C21, and J11-4. The board to be tested is provided with several test points, including TP1, TP2, and TP49. The board to be tested is provided with several resistors, one of which is a pin R145.

[0050] The test instrument 12 includes a No. 1 DC power supply, a No. 2 DC power supply, a No. 3 DC power supply, a computer host, a signal generator and a multimeter, and is provided with a neutral line N, a live line L and a ground line PE. The neutral line N, the live line L and the ground line PE of the No. 1 DC power supply, the No. 2 DC power supply, the No. 3 DC power supply, the computer host, the signal generator and the multimeter correspond to the neutral line N, the live line L and the ground line PE of the 220V AC power supply.

[0051] The circuit control board 11 includes a plurality of relays.

[0052] The card test fixture 7 includes a pin board 15. A plurality of test pins 16 are vertically arranged on the pin board 15. The board to be tested is placed on the pin board 15. The test pins 16 are connected to the connector, test points, and pins of the board to be tested. After the test instrument is connected to the circuit control board 11, it is connected to the test pins 16 through leads, so as to test the board to be tested.

[0053] No. 1 DC power supply, No. 2 DC power supply and No. 3 DC power supply are all provided with two channels, namely, channel 1 and channel 2.

[0054] Channel 1 V2CH1 of DC source No. 2 is connected to the input positive and negative terminals A13 and A12 of the board to be tested through relays, and the output current amplitude is detected internally by DC source No. 2.

[0055] The positive and negative terminals of the digital multimeter 34401A are connected to the test points TP1 and TP2 on the board to be tested through relays.

[0056] The positive and negative terminals of the oscilloscope are connected to R145 and O-A3 of the board to be tested through relays respectively.

[0057] The positive and negative ends of the signal generator are connected to A20 and C30 of the board to be tested through relays respectively.

[0058] The positive and negative ends of the first channel V1CH1 of the No. 1 DC power supply are connected to A17 and C21 of the board to be tested through relays respectively.

[0059] The positive and negative ends of the second channel V1CH2 of the No. 1 DC power supply are connected to A15 and C21 of the board to be tested through relays respectively.

[0060] The positive and negative ends of the second channel V2CH2 of the No. 2 DC source are connected to A13 and C21 of the board to be tested through relays respectively.

[0061] The positive and negative ends of channel 1 V3CH1 of DC source 3 are connected to TP49 and J11-4 of the board to be tested through relays respectively.

[0062] The test instrument detects different fault manifestations by reading the current and output positive and negative voltages of DC source No. 2. When DC source No. 2 has no output current and the digital multimeter does not detect 3.3V output, the fault cause is one of the following: MOS tube open circuit, poor connector connection, DC source no output, or any combination thereof.

[0063] The UPS circuit board card detection device is also provided with a label printer 3 at the lower part of the oscilloscope 2 for printing labels, and the labels are pasted on the card to be tested to facilitate identification of whether the board is faulty.

[0064] The UPS circuit board card detection device is further provided with a display fixing mechanism 9 and a display 8, and the display 8 is fixed on the surface of the instrument cabinet 10 through the display fixing mechanism 9. The display 8 is used to display the detection result.

[0065] The four corners of the bottom of the instrument cabinet 10 of the UPS circuit board card detection device are respectively provided with a foot cup 6 and a caster 5. The foot cup 6 is slidably arranged on the upper part of the caster 5. When the UPS circuit board card detection device is moved, the foot cup 6 is lifted to expose the caster 5. When the UPS circuit board card detection device needs to be fixed, the foot cup 6 is put down and put on the outer side of the caster 5.

[0066] The fixture testing fixture 7 is further provided with a slide rail module 13 , a support plate 14 , a quick pressing clamp 17 , a connecting plate 18 , a positioning column 19 and a flange plate 20 .

[0067] The positioning column 19 is vertically disposed below the needle plate 15 to fix the needle plate 15 .

[0068] The support plate 14 is disposed perpendicularly to the upper surface of the instrument cabinet 10 .

[0069] The slide rail module 13 is arranged on the surface of the support plate 14, the quick pressing clamp 17 is slidably installed in the slide rail module 13, and the flange plate 20 is fixedly connected to the tail end of the quick pressing clamp 17. The front and rear sides of the flange plate 20 are fixedly provided with connecting plates 18. The flange plate 20 and the connecting plate 18 are moved downward by pressing the quick pressing clamp 17, so that the board to be tested and the needle plate 15 are in close contact.

[0070] The process of using the above UPS circuit board card detection device to detect the UPS circuit board card is as follows:

[0071] The detection method of the op amp IC and its peripheral circuits is as follows: the DC source provides a regulated voltage to the op amp, the signal generator sends a sinusoidal signal to the op amp circuit, and the oscilloscope detects the output signal of the op amp circuit. The output signal includes frequency and amplitude.

[0072] The detection method of the comparator IC and its peripheral circuits is as follows: the DC source provides a regulated voltage supply to the comparator, the signal generator sends a square wave signal to the comparator circuit, and the digital multimeter detects the high and low level signals of the comparator circuit.

[0073] The detection method of the analog switch IC and its peripheral circuits is as follows: a DC source provides a regulated power supply to it, a signal generator sends a square wave signal to input into the analog switch circuit, and a digital multimeter detects the high and low level signals of the analog switch circuit.

[0074] Detection method of crystal oscillator circuit: DC source provides stable power supply to the crystal oscillator, and oscilloscope detects the oscillation frequency, amplitude and slope of the crystal oscillator circuit.

[0075] The detection method of the chip power supply current and I / O port impedance of the MCU processor is: use a DC source to power its circuit to check whether the power supply current exceeds the specification, and use a digital multimeter to perform impedance detection on the key I / O to determine whether the I / O is faulty.

[0076] The detection method of logic chips and peripheral circuits is to use a DC source to power their circuits, use a signal generator to input a specific waveform, and detect whether the output signal of the logic circuit is within the specification range.

[0077] The technical effects of the present invention are as follows:

[0078] 1. It can quickly locate the fault point, is easy to operate, saves manpower and reduces labor costs;

[0079] 2. By introducing a switching relay, one instrument can provide signals and detect different test points;

[0080] 3. Through self-selected detection methods: signal injection, substitution, parameter testing, waveform observation, etc., targeted maintenance detection can be achieved, and functional analysis, failure mode analysis, input and output pin analysis, performance testing and test data analysis of the board can be completed.

[0081] 4. Improve the reliability of nuclear power unit operation and avoid repeated maintenance due to spare parts problems.

Claims

1. A UPS circuit board card detection device, powered by a 220V AC power supply, characterized in that: The apparatus comprises an isolation transformer, an instrument cabinet (10), a card test fixture (7), an oscilloscope (2), an oscilloscope support mechanism (1), a circuit control board (11) and a test instrument (12); the instrument cabinet (10) is provided with a cabinet door (4), and the circuit control board (11) and the test instrument (12) are both placed in the cabinet door (4); the card test fixture (7) is placed on the upper surface of the instrument cabinet (10); the board to be tested is placed on the card test fixture (7); the oscilloscope (2) is fixed on the surface of the instrument cabinet (10) through the oscilloscope support mechanism (1); a 220V AC power supply is used to supply power to the oscilloscope (2) through the isolation transformer; the board to be tested is provided with a plurality of Connectors include A13, A12, O-A3, A20, C30, A15, A17, C21, and J11-4; the board to be tested is provided with a plurality of test points, including TP1, TP2, and TP49; the board to be tested is provided with a plurality of resistors, one of which is a pin R145; the test instrument (12) includes a No. 1 DC power supply, a No. 2 DC power supply, a No. 3 DC power supply, a computer host, a signal generator, and a multimeter, and each is provided with a neutral line N, a live line L, and a ground line PE; the neutral line N, the live line L, and the ground line PE of the No. 1 DC power supply, the No. 2 DC power supply, the No. 3 DC power supply, the computer host, the signal generator, and the multimeter are respectively connected to a 220V AC The circuit control board (11) comprises a plurality of relays; the card test fixture (7) comprises a pin board (15); a plurality of test pins (16) are vertically arranged on the pin board (15); the board to be tested is placed on the pin board (15), and the test pins (16) are connected to the connector, test points and pins of the board to be tested; after the test instrument (12) is connected to the circuit control board (11), it is connected to the test pins (16) through leads, so as to test the board to be tested; the positive and negative ends of the first channel (V1CH1) of the No. 1 DC power supply are respectively connected to A17 and C21 of the board to be tested through relays; the positive and negative ends of the second channel (V1CH2 ... The negative end is connected to A15 and C21 of the board to be tested through relays; the first channel (V2CH1) of the No. 2 DC source is connected to the input positive and negative terminals A13 and A12 of the board to be tested through relays, and the output current amplitude is detected internally by the No. 2 DC source; the positive and negative ends of the second channel (V2CH2) of the No. 2 DC source are connected to A13 and C21 of the board to be tested through relays; the positive and negative ends of the first channel (V3CH1) of the No. 3 DC source are connected to TP49 and J11-4 of the board to be tested through relays; a label printer (3) is arranged at the bottom of the oscilloscope (2) for printing labels; the labels are affixed to the card to be tested, so as to facilitate identification of whether the board is faulty.

2. The UPS circuit board card detection device according to claim 1, characterized in that: The positive and negative terminals of the digital multimeter (34401A) are connected to the test points TP1 and TP2 on the board to be tested through relays; the positive and negative terminals of the oscilloscope are connected to R145 and O-A3 of the board to be tested through relays; the positive and negative terminals of the signal generator are connected to A20 and C30 of the board to be tested after passing through relays.

3. The UPS circuit board card detection device according to claim 2, characterized in that: The UPS circuit board card detection device is also provided with a display fixing mechanism (9) and a display (8), and the display (8) is fixed on the surface of the instrument cabinet (10) through the display fixing mechanism (9).

4. The UPS circuit board card detection device according to claim 3, characterized in that: The card testing fixture (7) is also provided with a slide rail module (13), a support plate (14), a quick pressing clamp (17), a connecting plate (18), a positioning column (19) and a flange plate (20).

5. The UPS circuit board card detection device according to claim 4, characterized in that: The positioning column (19) is vertically arranged below the needle plate (15) for fixing the needle plate (15); the support plate (14) is vertically arranged on the upper surface of the instrument cabinet (10); the slide rail module (13) is arranged on the surface of the support plate (14); the quick pressing clamp (17) is slidably installed in the slide rail module (13); the flange plate (20) is fixedly connected to the rear end of the quick pressing clamp (17); the front and rear sides of the flange plate (20) are fixedly provided with connecting plates (18); the flange plate (20) and the connecting plate (18) are moved downward by pressing the quick pressing clamp (17), so that the board to be tested and the needle plate (15) are in close contact.

6. The UPS circuit board card detection device according to claim 1, characterized in that: The instrument cabinet (10) of the UPS circuit board card detection device is provided with a foot cup (6) and a caster (5) at each of the four bottom corners; the foot cup (6) is slidably arranged on the upper part of the caster (5).

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