Test system for judging whether functions of control output part of circuit board are normally operated or not

Abstract

The utility model relates to the technical field of power relay protection equipment, in particular to a test system for judging whether the function of a control output part of a circuit board runs normally, and the circuit board comprises a power supply board, a driving board, a power supply test module, a switching-on and switching-off test module, a switching-on and switching-off disconnection test module and a voltage and current sampling test module. Compared with the prior art, the circuit board testing device can independently detect the control output part of a circuit, accurately judges whether each function of the circuit board is normal or not, is high in testing efficiency and testing precision, and greatly improves the factory qualified rate of the circuit board.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electric power relay protection equipment, and particularly relates to a test system for judging whether the corresponding function of the control output part of a specific circuit board is normally running. BACKGROUND

[0002] In the process of manufacturing a circuit board, the circuit board may not realize its normal function due to the quality of the printed board, the quality of components, and the operation of a welder. In the whole machine test before the actual machine is put into the market, the whole machine is troublesome to disassemble, and problems are not easy to locate, so it is necessary to test each part separately before the whole machine is assembled to ensure that the function of each circuit board is normal. It is necessary to design a single board detection method for the circuit board. The previous test system has the problems of poor test effect, low test efficiency, and difficult problem positioning. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing a test system for judging whether the function of the control output part of a specific circuit board is normally running.

[0004] Based on the above technical problems, the utility model provides a test system for judging whether the function of the control output part of a circuit board is normally running, the circuit board includes a power supply board and a drive board, and the test system comprises a power supply test module, a switching test module, a switching line test module, and a voltage and current sampling test module.

[0005] The power supply test module is connected with the power supply board and comprises a power supply module and a plurality of first LED indicator lights, and is used for supplying power to the power supply board and lighting the plurality of first LED indicator lights.

[0006] The switching test module is connected with the drive board and comprises a plurality of second LED indicator lights and a key, and is used for giving the drive board a switching signal through the key and lighting the plurality of second LED indicator lights.

[0007] The switching line test module is connected with the drive board and comprises a plurality of third LED indicator lights and a two-position gear switch, and is used for giving the drive board a line breaking signal through the two-position gear switch and lighting the plurality of third LED indicator lights.

[0008] The voltage and current sampling test module is connected with the switching test module and comprises an operational amplifier and a plurality of fourth LED indicator lights, and is used for enhancing the sampling output driving capability of the drive board and lighting the plurality of fourth LED indicator lights.

[0009] During the test, the power supply voltage is 12V, and the power supply is selected from the same power supply board in the device, therefore, as preferred, the external power supply input of the power supply test module is 24V, and the power supply output is 24V, 12V, 6V, 5V and 3.3V.

[0010] For the detection of the device driving board, the main output of the driving board includes digital signals and analog signals, therefore, the digital signals output by the driving board include tripping signals, closing signals, tripping broken line signals and closing broken line signals, and the analog signals output by the driving board include tripping voltage, closing voltage, energy storage voltage, tripping current, closing current and energy storage current.

[0011] The utility model discloses the beneficial effect is: the utility model discloses compared with prior art, can carry out individual detection to the control output part of circuit, accurately judges whether each function of circuit board is normal, and its test efficiency is high, test precision is high, and the outgoing inspection pass rate of circuit board is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the principle block diagram of the test system of the utility model for judging whether the control output part function of circuit board is normal operation;

[0013] Figure 2 It is the principle block diagram of the specific embodiment of the test system of the utility model for judging whether the control output part function of circuit board is normal operation;

[0014] Figure 3 It is the circuit principle diagram of the power supply board output voltage detection of the utility model;

[0015] Figure 4 It is the circuit principle diagram of the tripping and closing detection and tripping and closing broken line detection of the utility model;

[0016] Figure 5 It is the circuit principle diagram of the tripping and closing voltage current sampling detection of the utility model. PREFERRED EMBODIMENT

[0017] The preferred embodiment of the utility model is described in detail below in combination with the drawings, so that the advantages and characteristics of the utility model can be more easily understood by the person skilled in the art, and the protection scope of the utility model is more clearly and explicitly defined.

[0018] As Figure 1The diagram illustrates a test system for determining whether the control output function of a circuit board is operating normally. The circuit board includes a power supply board and a driver board, comprising a power supply test module, a circuit breaker opening and closing test module, a circuit breaker opening and closing disconnection test module, and a voltage and current sampling test module. The power supply test module is connected to the power supply board and includes a power supply module and multiple first LED indicators. The circuit breaker opening and closing test module is connected to the driver board and includes a button and multiple second LED indicators. The circuit breaker opening and closing disconnection detection module is connected to the driver board and includes a two-position toggle switch and multiple third LED indicators. The voltage and current sampling test module is connected to the circuit breaker opening and closing test module and includes an operational amplifier and multiple fourth LED indicators.

[0019] Specifically, in combination Figure 2 As shown, the external power input of the power supply test module is 24V, and the power output is 24V, 12V, 6V, 5V, and 3.3V. Its output voltage is directly connected in series with a resistor and the 6 first LED indicator lights. The resistor limits the current to ensure that the first LED indicator lights can be lit only when the required voltage is reached.

[0020] Specifically, the digital signals output by the driver board include opening signal, closing signal, opening disconnection signal, and closing disconnection signal. The analog signals output by the driver board include opening voltage, closing voltage, energy storage voltage, opening current, closing current, and energy storage current. The driver board of the opening and closing test module (digital quantity) driver circuit board directly outputs opening and closing signals, but it needs to be given opening and closing signals. This part is triggered by the button. Since the opening and closing output voltage and current are relatively large, a high-power resistor needs to be connected in series as a load, and a 24V indicator light needs to be connected in parallel as its indication signal.

[0021] Specifically, the toggle switch for the circuit breaker disconnection detection (digital quantity) is connected in series in the circuit breaker control circuit. When the control circuit meets the disconnection condition, the corresponding output of the drive board is high level (determined by the drive board). Since its driving capability is insufficient, a pull-up resistor and power supply need to be added to its output to make the LED indicator light up.

[0022] Specifically, in the voltage and current sampling test (analog quantity), the driver board outputs the sampling data in the form of voltage. Since the output driving capability is insufficient and the voltage value cannot be determined, an operational amplifier is used to amplify the driving capability to ensure the voltage output value, thereby lighting up the LED indicator and indicating that the sampling is normal.

[0023] The working principle of this utility model is as follows:

[0024] Combination Figures 3-5As shown, insert the circuit boards to be tested, namely the power board and the driver board, into the corresponding positions. Use the external 24V to plug into the P1 terminal to power the test board, and connect P1 in parallel to P2 to power the driver board. At this time, the LED indicator corresponding to the voltage of the power board will be lit, which proves that the output voltages of the power board are normal.

[0025] The following tests were conducted on the driver board: The opening and closing detection simulates signals from the CPU to the driver board. Two tactile switches, S2 and S4, control the opening and closing outputs of the driver board, respectively, and the signals are routed to J1 to transmit to the driver board, simulating opening and closing control. Because the opening and closing output voltage and current are relatively large, the outputs are routed to the test board via J2, connected in series with a high-power resistor. To ensure observability, a 24V LED indicator is connected in parallel with the high-power resistor to prevent short-circuit damage to the driver board during opening and closing, and to allow for observation of the opening and closing phenomena. Two toggle switches, S3 and S5, are connected in series in the opening and closing circuit. During normal opening and closing tests, the circuit remains continuous. During the circuit disconnection detection, the toggle switches are used to create an open circuit, triggering the circuit disconnection. At this time, taking advantage of the characteristic that the driver board is in a high-level state when the circuit is disconnected, the high level is used to provide current to drive LED1 and LED2 indicator lights by using pull-up resistors R2 and R3 and power supply VCC respectively. If the control circuit is not disconnected, FZ_CHEK and HZ_CHEK are in a low-level state at this time, and the LED indicator lights cannot be lit.

[0026] For the sampling test of opening and closing voltage and current (analog quantity), since the driving capability of the driver board's sampling output is insufficient, an operational amplifier is used here to perform voltage follower output to increase its driving capability. At the same time, an appropriate resistance value is set to ensure that the sampling voltage and current output can light up the LED indicator within a certain range. Taking the closing voltage sampling V_close as an example, the closing voltage is output from the driver board and then enters the operational amplifier U1B of the test board. The amplifier output is directly connected in series with the resistor and the LED indicator.

[0027] Finally, it should be noted that the above embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model. These modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A test system for determining whether the control output section of a circuit board functions normally, the circuit board comprising a power supply board and a driver board, characterized in that: It includes a power supply test module, a circuit breaker opening and closing test module, a circuit breaker opening and closing open circuit detection module, and a voltage and current sampling test module; The power test module is connected to the power board and includes a power supply module and multiple first LED indicators, which are used to supply power to the power board and light up the multiple first LED indicators. The circuit breaker test module is connected to the drive board and includes buttons and multiple second LED indicators. The buttons send circuit breaker signals to the drive board and illuminate the multiple second LED indicators. The circuit breaker disconnection detection module is connected to the drive board and includes a two-position toggle switch and multiple third LED indicator lights. The two-position toggle switch sends a disconnection signal to the drive board and lights up the multiple third LED indicator lights. The voltage and current sampling test module is connected to the circuit breaker opening and closing test module, and includes an operational amplifier and multiple fourth LED indicators, which are used to enhance the sampling output driving capability of the driver board and light up the multiple fourth LED indicators.

2. The test system for determining whether the control output section of a circuit board is functioning normally according to claim 1, characterized in that: The power supply test module has an external power input of 24V and power outputs of 24V, 12V, 6V, 5V, and 3.3V.

3. The test system for determining whether the control output section of a circuit board is functioning normally according to claim 2, characterized in that: The digital signals output by the driver board include trip signal, close signal, trip disconnect signal, and close disconnect signal.

4. The test system for determining whether the control output section of a circuit board is functioning normally according to claim 3, characterized in that: The analog signals output by the driver board include opening voltage, closing voltage, energy storage voltage, opening current, closing current, and energy storage current.

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