CN205080242U - Power strip function test system - Google Patents

Abstract

The utility model discloses a power strip function test system, include host computer, control chip and the function detection circuitry who is used for the power strip to test, function detection circuitry corresponds and is connected with the corresponding test point of power strip, detects the power strip to the output sense result, control chip is connect function detection circuitry and host computer respectively, and testing result according to the output of function detection circuitry produces corresponding level signal to export this level signal to host computer. The utility model discloses technical scheme can realize power strip functional test's full automatization, need not operating personnel, has promoted efficiency of software testing by a wide margin to effectual having avoided because people's kopiopia causes the problem of erroneous judgement.

Description

Power board function test system

technical field

The utility model relates to the technical field of household appliances, in particular to a power board function test system.

Background technique

All kinds of electrical equipment need to be tested for function before leaving the factory, especially the power board, which is an important part of the electrical equipment. The existing power board test scheme is to pick and place the power board manually. The operator operates the test tool and automatically analyzes the product function through the built-in test board of the test tool. The analysis result is fed back to the operator in the form of a digital tube or LED display. According to the results displayed by the digital tube or LED, the technicians can judge whether the product function is good or not, and send it for maintenance after marking. This kind of test scheme requires manual operation of the test tool, judgment of the function of the power board, and marking for maintenance. The manual labor intensity is high and the efficiency is low. In addition, when the operator's eyes are tired, it is easy to cause misjudgment due to carelessness. .

Therefore, it is very necessary to propose a new power board test scheme.

Utility model content

The main purpose of the utility model is to provide a power board function testing system, aiming at improving the testing efficiency of the power board and avoiding misjudgment by the operator.

In order to achieve the above object, the power board function test system proposed by the utility model includes a host computer, a control chip and a function detection circuit for power board testing, and the function detection circuit is correspondingly connected with the corresponding test point of the power board, Detect the power board, and output the detection result; the control chip is respectively connected to the function detection circuit and the host computer, and generates a corresponding level signal according to the detection result output by the function detection circuit, and sends The level signal is output to the host computer.

Preferably, the function detection circuit includes a sampling module for sampling the output voltage of the power board, the sampling module includes three voltage sampling circuits, and the sampling input terminals of each voltage sampling circuit are respectively connected to the 5V voltage of the power board. Output terminal, 12V output terminal and 24V output terminal, the sampling output terminal of each voltage sampling circuit is respectively connected to the A/D port of the control chip; each voltage sampling circuit outputs the sampled voltage to the corresponding A/D port of the control chip D port, the control chip respectively judges whether the voltage received by each A/D port is equal to the preset voltage, so as to output a corresponding level signal to the host computer.

Preferably, the voltage sampling circuit includes a first resistor, a second resistor and a first capacitor, the first end of the first resistor serves as the sampling input end of the voltage sampling circuit, and the second end of the first resistor As a sampling output terminal of the voltage sampling circuit, the second terminal of the first resistor is grounded through the second resistor, and the first capacitor is connected in parallel with the second resistor.

Preferably, the function detection circuit includes a circuit detection module for detecting whether the temperature sensing circuit of the power board is intact, and the circuit detection module includes a plurality of detection loads, and each detection load is related to the temperature on the power board. The detection circuits are connected in one-to-one correspondence; wherein, the temperature detection circuit includes a temperature sensor socket, a third resistor and a second capacitor, one end of the temperature sensor socket is connected to a power supply, and the other end of the temperature sensor socket is connected to the third The resistor is grounded, the second capacitor is connected in parallel with the third resistor; one end of the detection load is connected to the power supply, the other end of the detection load is connected to the other end of the temperature sensor socket and the control chip, and the control chip The chip judges whether the voltage at the other end of the detection load is equal to a preset voltage, and outputs a corresponding level signal to the host computer.

Preferably, the power board function test system also includes a leakage test module, the leakage test module includes two test current generation circuits connected to the input terminals of the leakage coil on the power board, and the control chip is connected to the The leakage protection port of the power board outputs a corresponding level signal to the host computer according to the level of the leakage protection port.

Preferably, the test current generating circuit includes a fourth resistor, a fifth resistor, a sixth resistor, an NPN transistor and a first optocoupler, and the anode of the light emitting diode of the first optocoupler is connected to the power supply through the fourth resistor , the cathode of the light-emitting diode of the first optocoupler is connected to the collector of the NPN transistor, the emitter of the NPN transistor is grounded, the base of the NPN transistor is grounded through the fifth resistor, and the The collector of the phototransistor of the first optocoupler is connected to the power supply through the sixth resistor, and the emitter of the phototransistor of the first optocoupler is connected to the input end of the leakage coil; the control chip is connected to the NPN type transistor The base of the output drive current to the base of the NPN transistor.

Preferably, the power board function test system also includes a relay on-off detection module, the relay on-off detection module includes a plurality of on-off detection circuits, and the on-off detection circuit includes a seventh resistor, an eighth resistor, a third Capacitor and high-voltage optocoupler, wherein, the anode of the light-emitting diode of the high-voltage optocoupler is connected to the live wire of the power supply through the seventh resistor and a relay switch on the power supply board in turn, and the cathode of the light-emitting diode of the high-voltage optocoupler is connected through the A relay switch of the power board is connected to the neutral line of the power supply; the collector of the phototransistor of the high-voltage optocoupler is connected to the power supply, the emitter of the phototransistor of the high-voltage optocoupler is grounded through the eighth resistor, and the third The capacitor is connected in parallel with the eighth resistor; the control chip is connected to the emitter of the phototransistor of the high-voltage optocoupler, and outputs a corresponding level signal to the The upper computer: the control chip is respectively connected to the conduction control terminals of each relay switch, and controls the conduction and shutdown of each relay switch.

Preferably, the power board function test system further includes an LED display module connected to the control chip.

Preferably, the control chip is a TMP89FM42UG single-chip microcomputer.

The technical scheme of the utility model performs function detection and testing on the power board through the function detection circuit, and the function detection circuit outputs the detection results to the control chip, and the control chip outputs corresponding level signals to the host computer according to each detection result. The upper computer can test the corresponding level signals according to the received functions of the power board, and can know whether the functions of the current power board are normal, or which function is abnormal, so that the current detection power board can be detected by controlling the corresponding peripheral automation equipment. (when the function of the power board is abnormal) send it to the maintenance department, or send the current power board (when the function of the power board is normal) to the good product place and test the next power board, etc., so that the full automation of the function test of the power board is realized. , no operator is required, the test efficiency is greatly improved, and the problem of misjudgment caused by human eye fatigue is effectively avoided.

Description of drawings

Fig. 1 is the functional module schematic diagram of the preferred embodiment of the utility model power board function testing system;

Fig. 2 is the circuit diagram of the voltage sampling circuit of function detection circuit in Fig. 1;

Fig. 3 is the circuit diagram when the detection load of the function detection circuit in Fig. 1 is connected with the temperature detection circuit of the power board;

Fig. 4 is the circuit diagram of the test current generating circuit of the functional detection circuit in Fig. 1;

FIG. 5 is a circuit diagram of an on-off detection circuit of the function detection circuit in FIG. 1 .

Explanation of reference numbers:

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

The utility model provides a power board function testing system.

With reference to Fig. 1 to 5, Fig. 1 is the functional module schematic diagram of the preferred embodiment of the utility model power supply board function test system; Fig. 2 is the circuit diagram of the voltage sampling circuit of the functional detection circuit in Fig. 1; Fig. 3 is the functional detection in Fig. 1 The circuit diagram when the detection load of the circuit is connected to the temperature detection circuit of the power board; Fig. 4 is a circuit diagram of the test current generating circuit of the function detection circuit in Fig. 1; Fig. 5 is a circuit diagram of the relay on-off detection circuit of the function detection circuit in Fig. 1 .

In the embodiment of the present utility model, the power board function test system includes a host computer 100, a control chip 200 and a function detection circuit 300 for testing the power board. The function detection circuit 300 is correspondingly connected to the corresponding test point of the power board. The control chip 200 is respectively connected to the function detection circuit 300 and the upper computer 100, and the control chip 200 receives the detection result output by the function detection circuit 300, and outputs a corresponding level signal to the upper computer 100 according to the detection result .

The technical solution of the utility model performs function detection and testing on the power board through the function detection circuit 300, and the function detection circuit 300 outputs the detection results to the control chip 200 respectively, and the control chip 200 outputs corresponding level signals to the host computer according to each detection result 100, for example, the control chip 200 outputs a high level to the host computer 100 according to a qualified detection result, and outputs a low level to the host computer 100 according to an unqualified detection result. The upper computer 100 can know whether each function of the current power board is normal or which function is abnormal according to the received level signal of each function test of the power board, so that the current detection power can be detected by controlling the corresponding peripheral automation equipment. Send the power board (when the function of the power board is abnormal) to the maintenance department, or send the current power board (when the function of the power board is normal) to the good product place and test the next power board, etc., so that the full function test of the power board is realized. It is automated and does not require operators, which greatly improves the test efficiency and effectively avoids the problem of misjudgment caused by human eye fatigue.

Preferably, the control chip 200 of this embodiment preferably selects an existing TMP89FM42UG single-chip microcomputer, of course, the control chip 200 can also be other similar single-chip microcomputers or chips.

Preferably, the function detection circuit 300 includes a sampling module for sampling the output voltage of the power board. The sampling module includes three voltage sampling circuits 310, and the sampling input terminals of each voltage sampling circuit 310 are respectively connected to the 5V output terminal and the 12V output terminal of the power board. terminal and 24V output terminal, the sampling output terminals of each voltage sampling circuit 310 are respectively connected to the A/D port of the control chip 200; each voltage sampling circuit 310 outputs the sampled voltage to the corresponding A/D port of the control chip 200, and the control chip 200 respectively judges whether the voltage received by each A/D port is equal to a preset voltage (can be compared and judged by a comparator), so as to output a corresponding level signal to the host computer 100 . The power board has three voltage output terminals of 5V, 12V and 24V. The function detection circuit 300 samples the three voltage output terminals of the power board through the three voltage sampling circuits 310 of the sampling module, and sends the sampled voltages to the control The chip 200 judges whether it is equal to the corresponding preset voltage, so as to determine whether the three voltage output terminals of the current power board are normal; when the sampled voltage is equal to the preset voltage, it means normal, otherwise it is abnormal.

Preferably, referring to FIG. 2 , the voltage sampling circuit 310 of this embodiment includes a first resistor R1, a second resistor R2 and a first capacitor C1, and the first terminal 1 of the first resistor R1 serves as the sampling input terminal of the voltage sampling circuit 310, The second terminal 2 of the first resistor R1 is used as the sampling output terminal of the voltage sampling circuit 310 , the second terminal 2 of the first resistor R1 is grounded through the second resistor R2 , and the first capacitor C1 is connected in parallel with the second resistor R2 . The sampling voltage output by the voltage sampling circuit 310 is the divided voltage value of the second resistor R2 on the series loop formed by the first resistor R1 and the second resistor R2. The resistance values of the resistors in each voltage sampling circuit 310 can be set to be different. For example, the first resistor R1 and the second resistor R2 are both 10KΩ, and the first terminal 1 of the first resistor R1 is connected to the 5V output terminal of the power board. If the 5V output terminal of the power board is normal, the second resistor R2 The divided voltage is 2.5V, and the control chip 200 only needs to judge whether the voltage sampled by the voltage sampling circuit 310 is 2.5V, then it can determine whether the 5V output terminal of the power board is normal; the judgment of the 12V output terminal and the 24V output terminal is the same reason.

Preferably, the function detection circuit 300 includes a line detection module for detecting whether the temperature sensing circuit of the power board is intact, the line detection module includes a plurality of detection loads RL (preferably resistance), and each detection load RL is connected with the temperature detection on the power board. The circuits are connected in one-to-one correspondence; wherein, the temperature detection circuit includes a temperature sensor socket CN, a third resistor R3 and a second capacitor C2, one end of the temperature sensor socket CN is connected to the power supply VCC, and the other end of the temperature sensor socket CN is grounded through the third resistor R3 , the second capacitor C2 is connected in parallel with the third resistor R3; one end of the detection load RL is connected to the power supply VCC, and the other end of the detection load RL is connected to the other end of the temperature sensor socket CN and the control chip 200, that is, the other end of the detection load RL is used as a detection output end; the control chip 200 judges whether the voltage at the other end of the detection load RL is equal to a preset voltage, so as to output a corresponding level signal to the host computer 100 . The signal output from the detection output terminal is the divided voltage on the third resistor R3.

Further, the power board function test system of the present embodiment also includes a leakage test module, the leakage test module includes two test current generating circuits 320 connected to the input terminals of the leakage coil on the power board, and the control chip 200 is connected to the leakage coil of the power board. The protection port (that is, the LB port of the power board) outputs a corresponding level signal to the host computer 100 according to the level of the leakage protection port. The two test current generating circuits 320 are respectively used to generate leakage test currents of different sizes to be input to the input terminals of the leakage coil, wherein the larger leakage test current is used to test whether the leakage protection circuit of the power board can trigger the leakage protection, and the smaller leakage test current is used to test whether the leakage protection circuit of the power board can trigger the leakage protection. The test current is used to test whether the leakage protection circuit of the power board can resist interference. When the leakage protection circuit of the power board triggers protection, the leakage protection port is at low level, and when the leakage protection circuit of the power board does not trigger protection, the leakage protection port is at high level. When the control chip 200 outputs a large leakage test current to the input terminal of the leakage coil by the leakage test module, it receives a low level output from the leakage protection terminal, and outputs a large leakage test current to the input terminal of the leakage coil by the leakage test module When receiving the high level output of the leakage point protection terminal, it is determined that the leakage protection function of the power board is normal, otherwise it is abnormal.

Specifically, referring to FIG. 4 , the test current generating circuit 320 of this embodiment includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, an NPN transistor Q1, and a first optocoupler U1, and the light emission of the first optocoupler U1 The anode of the diode is connected to the power supply VCC through the fourth resistor R4, the cathode of the light-emitting diode of the first optocoupler U1 is connected to the collector of the NPN transistor Q1, the emitter of the NPN transistor Q1 is grounded, and the base of the NPN transistor Q1 is connected to the fifth The resistor R5 is grounded, the collector of the phototransistor of the first optocoupler U1 is connected to the power supply VCC through the sixth resistor R6, the emitter of the phototransistor of the first optocoupler U1 is connected to the input end of the leakage coil; the control chip 200 is connected to the NPN transistor Q1 The base of the output drive current to the base of the NPN transistor. The working principle of the test current generation circuit 320 is as follows: the control chip 200 outputs a drive current to turn on the NPN transistor Q1, and then the cathode of the light-emitting diode of the first optocoupler U1 is grounded, and the light-emitting diode of the first optocoupler U1 turns on and emits light. The phototransistor of an optocoupler U1 is turned on, so that the emitter of the phototransistor of the first optocoupler U1 outputs a test current to the input terminal of the leakage coil. The resistance values of the sixth resistors R6 in the two test current generating circuits 320 are different, so that the two test current generating circuits 320 output different test currents.

Further, the power board function test system also includes a relay on-off detection module, and the relay on-off detection module includes a plurality of on-off detection circuits 330. Referring to FIG. 5, the on-off detection circuit 330 includes a seventh resistor R7, an eighth resistor R8, The third capacitor C3 and the high-voltage optocoupler U2, wherein the anode of the light-emitting diode of the high-voltage optocoupler U2 is connected to the live line L of the power supply through the seventh resistor R7 and a relay switch K on the power supply board, and the cathode of the light-emitting diode of the high-voltage optocoupler U2 A relay switch K on the power board is connected to the neutral line N of the power supply; the collector of the phototransistor of the high-voltage optocoupler U2 is connected to the power supply VCC, the emitter of the phototransistor of the high-voltage optocoupler U2 is grounded through the eighth resistor R8, and the third capacitor C3 and The eighth resistor R8 is connected in parallel; the control chip 200 is connected to the emitter of the phototransistor of the high-voltage optocoupler U2, and outputs a corresponding level signal to the host computer 100 according to the level of the emitter of the phototransistor of the high-voltage optocoupler U2; the control chip 200 respectively The conduction control terminal S of each relay switch K is connected to control the conduction and shutdown of each relay switch K.

The output signal of the control chip 200 controls the conduction of the relay switch K connected to the two ends of the light-emitting diode of the high-voltage optocoupler U2. The phototransistor of the high-voltage optocoupler U2 is turned on, and the emission of the phototransistor of the high-voltage optocoupler U2 is extremely high, that is, the control chip 200 receives a high level. If the control chip 200 receives a low level, it means that there is an abnormal relay switch K in the relay switch K of the power board, and the control chip 200 outputs a level signal corresponding to the abnormal state to the upper computer 100 .

Further, the power board function test system also includes an LED display module (not shown in the figure) connected to the control chip 200 for displaying the test result of the power board.

It should be noted that, in all the above embodiments, the power supply VCC can be of different voltages.

It should be noted that the technical solutions of the various embodiments of the present invention can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be regarded as The combination of schemes does not exist, nor is it within the scope of protection required by the utility model.

The above is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure transformation made by using the specification of the utility model and the contents of the accompanying drawings, or directly or indirectly used in other related technologies Fields are all included in the scope of patent protection of the utility model in the same way.

Claims (9)

1. A power supply board function test system, is characterized in that, comprises upper computer, control chip and the function detection circuit that is used for power supply board test, and described function detection circuit is correspondingly connected with the corresponding test point of described power supply board, to all The power board is detected, and the detection result is output; the control chip is respectively connected to the function detection circuit and the host computer, and according to the detection result output by the function detection circuit, a corresponding level signal is generated, and the power The flat signal is output to the host computer. 2. The power board function test system as claimed in claim 1, wherein the function detection circuit includes a sampling module for sampling the output voltage of the power board, and the sampling module includes three voltage sampling circuits, each The sampling input terminals of the voltage sampling circuit are respectively connected to the 5V output terminal, the 12V output terminal and the 24V output terminal of the power board, and the sampling output terminals of each voltage sampling circuit are respectively connected to the A/D port of the control chip; each voltage sampling The circuit outputs the sampled voltage to the corresponding A/D port of the control chip, and the control chip judges whether the voltage received by each A/D port is equal to the preset voltage to output the corresponding level signal to the corresponding A/D port. above-mentioned upper computer. 3. The power board function test system as claimed in claim 2, wherein the voltage sampling circuit comprises a first resistor, a second resistor and a first capacitor, and the first end of the first resistor is used as the voltage The sampling input terminal of the sampling circuit, the second terminal of the first resistor is used as the sampling output terminal of the voltage sampling circuit, the second terminal of the first resistor is grounded through the second resistor, and the first capacitor and The second resistors are connected in parallel. 4. The power board function test system as claimed in claim 1, wherein the function detection circuit includes a circuit detection module for detecting whether the temperature sensing circuit of the power board is intact, and the circuit detection module includes A plurality of detection loads, each detection load is connected to the temperature detection circuit on the power board in a one-to-one correspondence; wherein, the temperature detection circuit includes a temperature sensor socket, a third resistor and a second capacitor, and one end of the temperature sensor socket Connect the power supply, the other end of the temperature sensor socket is grounded through the third resistor, the second capacitor is connected in parallel with the third resistor; one end of the detection load is connected to the power supply, and the other end of the detection load is connected to the The other end of the temperature sensor socket and the control chip, the control chip judges whether the voltage at the other end of the detection load is equal to a preset voltage, so as to output a corresponding level signal to the host computer. 5. The power supply board function test system as claimed in claim 1, is characterized in that, also comprises leakage test module, and described leakage test module comprises two test current generators that are connected with the input end of the leakage coil on the power supply board circuit, the control chip is connected to the leakage protection port of the power board, and outputs a corresponding level signal to the host computer according to the level of the leakage protection port. 6. The power board function test system as claimed in claim 5, wherein the test current generating circuit comprises a fourth resistor, a fifth resistor, a sixth resistor, an NPN triode and a first optocoupler, and the first optocoupler The anode of the light-emitting diode of an optocoupler is connected to the power supply through the fourth resistor, the cathode of the light-emitting diode of the first optocoupler is connected to the collector of the NPN transistor, the emitter of the NPN transistor is grounded, and the The base of the NPN transistor is grounded through the fifth resistor, the collector of the phototransistor of the first optocoupler is connected to the power supply through the sixth resistor, and the emitter of the phototransistor of the first optocoupler is connected to the The input end of the leakage coil; the control chip is connected to the base of the NPN transistor, and outputs a driving current to the base of the NPN transistor. 7. The power board functional testing system as claimed in claim 1, further comprising a relay on-off detection module, said relay on-off detection module comprising a plurality of on-off detection circuits, said on-off detection circuit comprising a first Seven resistors, an eighth resistor, a third capacitor and a high-voltage optocoupler, wherein the anode of the light-emitting diode of the high-voltage optocoupler is connected to the live wire of the power supply through the seventh resistor and a relay switch on the power supply board in sequence, and the The cathode of the light-emitting diode of the high-voltage optocoupler is connected to the zero line of the power supply through a relay switch of the power supply board; the collector of the phototransistor of the high-voltage optocoupler is connected to the power supply, and the emitter of the phototransistor of the high-voltage optocoupler is The eighth resistor is grounded, the third capacitor is connected in parallel with the eighth resistor; the control chip is connected to the emitter of the phototransistor of the high-voltage optocoupler, and according to the level of the emitter of the phototransistor of the high-voltage optocoupler Output corresponding level signals to the host computer; the control chip is respectively connected to the conduction control terminals of each relay switch to control the conduction and shutdown of each relay switch. 8. The power board function test system according to any one of claims 1 to 7, further comprising an LED display module connected to the control chip. 9. The power board function test system according to any one of claims 1 to 7, wherein the control chip is a TMP89FM42UG single-chip microcomputer.