Wire harness detection device

Abstract

The utility model relates to the technical field of circuit testing, in particular to a wire harness detection device. In the application, the first voltage can be set to be 24V voltage and is used for providing high voltage; the second voltage can be set to be 5V voltage and is used for providing low voltage. And the detection IO board J5 can freely extend relative to the main control MCU, so that the detection work can be facilitated. When the conduction performance of a wire harness to be tested needs to be tested, the two ends of the wire harness to be tested are inserted into the two test IO ports of the detection IO board, then the access IO ports of the two master control MCUs are conducted with the wire harness to be tested, the correspondingly connected access IO ports can input signals and output signals, after the wire harness to be tested is inserted, the master control MCUs output signals from one connected access IO port, and the test IO ports of the detection IO board are connected with the master control MCUs. And if the access IO port of the other connection can receive the signal, the conduction performance of the wire harness to be tested is normal.

Description

Technical Field

[0001] The present application relates to the field of circuit testing technology, and in particular to a wiring harness detection device. Background Art

[0002] In modern industrial production, testing the continuity of wiring harnesses is a critical step in ensuring product quality and safety. As a crucial component connecting various electronic components, the wiring harness's conductivity directly impacts the stability and reliability of the entire system. Traditional wiring harness continuity testing methods often rely on manual operation, resulting in low efficiency and high false positive rates, which compromise product safety. Therefore, developing a device for testing wiring harness conductivity is a technical challenge that needs to be addressed in this field. Utility Model Content

[0003] In view of this, the present application provides a wiring harness detection device, in which each access IO port of the main control MCU can both input and output signals, and the wiring harness conductivity performance can be conveniently detected by inserting the device to be tested.

[0004] In the first aspect, the present application provides a wiring harness detection device, including: a power supply module, including a transformer circuit, an input voltage is connected to the power supply module, the power supply module is used to output a first voltage and output a second voltage through the transformer circuit, the first voltage is greater than the second voltage; a main control MCU, including a main control Vcc terminal, the transformer circuit is connected in series with the main control Vcc terminal to input the second voltage to the main control MCU, and the main control MCU includes multiple access IO ports; a detection IO board J5, including multiple test IO ports, multiple test IO ports and multiple access IO ports are connected in series one-to-one through a wiring harness, the test IO port is used to plug into the test wiring harness, the detection IO board J5 also includes a detection IO board electrical access interface and a detection IO board ground port, the detection IO electrical access port is connected to the second voltage, and the detection IO board ground port is grounded; and a communication module, electrically connected to the communication port of the main control MCU.

[0005] In combination with the first aspect, in a possible implementation, the power supply module includes: a connector J1, a connector J2, a transformer module U1, a first voltage output terminal and a second voltage output terminal, the first voltage output terminal is used to output the first voltage, and the second voltage output terminal is used to output the second voltage; the transformer module U1 includes a transformer Vin terminal, a transformer OUTPUT terminal, a transformer ON / OFF terminal, and a transformer FEEDBACK terminal, the connector J2 and the connector J1 are connected in series, the transformer Vin terminal is connected in series to the positive output terminal of the connector J2, the second voltage output terminal is connected in series to the transformer OUTPUT terminal, and the transformer ON / OFF terminal is connected in series to the positive output terminal of the connector J2. The sub and the transformer FEEDBACK terminal are both grounded, and the second voltage output terminal is connected in series with the main control Vcc terminal; a diode D1 and a capacitor F1 are connected in series between the positive output terminal of the connector J2 and the transformer Vin terminal, the first voltage output terminal is connected in series with the output end of the diode D1, a Zener diode Q1, a capacitor C1 and a capacitor C3 are connected in parallel between the transformer Vin terminal and the transformer ON / OFF terminal, a Schottky barrier diode D2, a capacitor C2 and a capacitor C4 are connected in parallel between the transformer ON / OFF terminal and the transformer OUTPUT terminal, and an inductor L1 is connected in series between the transformer OUTPUT terminal and the second voltage output terminal.

[0006] In combination with the first aspect, in a possible implementation, a reference voltage circuit is further included, wherein the reference voltage circuit includes a Zener diode Q2, a resistor R1, a resistor R3, a resistor R5, an inductor C8, and an inductor C9, wherein the Zener diode Q2 includes a Zener diode Q2 anode, a Zener diode Q2 cathode, and a Zener diode Q2 control electrode, wherein the Zener diode Q2 anode is grounded, the Zener diode Q2 cathode is connected in series with the second voltage output terminal, and the Zener diode Q2 cathode is connected in series with the reference voltage VREF terminal of the master MCU. In the embodiment, the resistor R1 is connected in series between the cathode of the Zener diode Q2 and the second voltage output terminal, the resistor R3 and the resistor R5 are connected in series with each other and then connected in parallel to the anode of the Zener diode Q2 and the cathode of the Zener diode Q2, the inductor C8 is connected in parallel to the anode of the Zener diode Q2 and the cathode of the Zener diode Q2, the inductor C9 is connected in parallel to the anode of the Zener diode Q2 and the cathode of the Zener diode Q2, and the control electrode of the Zener diode Q2 is connected in series with the line between the resistor R3 and the resistor R5.

[0007] In combination with the first aspect, in a possible implementation, it further includes: multiple interface protection modules, the interface protection modules including multiple protection IO ports, the multiple protection IO ports being connected in series with the same number of the test IO ports in a one-to-one correspondence; and multiple pull-up resistors, one end of the pull-up resistor being connected in series with one of the test IO ports, and the other end of the pull-up resistor being connected to the second voltage.

[0008] In combination with the first aspect, in a possible implementation, it also includes a pressure sensor interface J3, an operational amplifier U2 and a resistor R2, wherein the pressure sensor interface J3 is used to connect the pressure sensor, and the pressure sensor interface J3 includes a first end of the pressure sensor interface, a second end of the pressure sensor interface and a third end of the pressure sensor interface, the first end of the pressure sensor interface is connected to the second voltage, the second end of the pressure sensor interface is grounded, the third end of the pressure sensor interface is connected in series with the resistor R2 and the operational amplifier +IN terminal of the operational amplifier U2, the operational amplifier OUT terminal of the operational amplifier U2 is connected in series with the operational amplifier -IN ​​terminal and the main control QMI terminal of the main control MCU, the operational amplifier V- terminal of the operational amplifier U2 is grounded, and the operational amplifier V+ terminal of the operational amplifier U2 is connected to the second voltage.

[0009] In combination with the first aspect, in a possible implementation, it also includes an airtight meter interface J4, a resistor R6 and a diode D3, the airtight meter interface J4 includes a first end of the airtight meter interface, a second end of the airtight meter interface and a third end of the airtight meter interface, the first end of the airtight meter interface is connected to the first voltage, the second end of the airtight meter interface is connected in series with the main control QMB terminal of the main control MCU, the main control QMI terminal of the main control MCU is connected in series with the positive electrode of the diode D3, the negative electrode of the diode D3 is connected in series with the third end of the airtight meter interface, one end of the resistor R6 is connected to the second voltage, and the other end of the resistor R6 is connected in series between the main control QMI terminal and the diode D3.

[0010] In combination with the first aspect, in a possible implementation, it further includes a program download interface J6, a resistor R10 and a light-emitting diode D5, the program download interface J6 includes a first end of the download interface, a second end of the download interface, a third end of the download interface and a fourth end of the download interface, the first end of the download interface is connected to the second voltage, the second end of the download interface is connected in series with the main control TXD terminal of the main control MCU, the third end of the download interface is connected in series with the main control RXD terminal of the main control MCU, the fourth end of the download interface is grounded, one end of the resistor R10 and the positive electrode of the light-emitting diode D5, the negative electrode of the light-emitting diode D5 is grounded, and the other end of the resistor R10 is connected in series between the main control TXD terminal and the second end of the download interface.

[0011] In combination with the first aspect, in a possible implementation, it further includes a locking solenoid valve interface J7, an NPN transistor Q2, a diode D4, a resistor R11, a resistor R12, a trigger switch pin interface J8 and a resistor R13, wherein the locking solenoid valve interface J7 includes a locking solenoid valve interface first end and a locking solenoid valve interface second end, the positive and negative electrodes of the diode D4 are connected in parallel to the locking solenoid valve interface first end and the locking solenoid valve interface second end, the collector of the NPN transistor Q2 is connected in series with the positive electrode of the diode D4, the base of the NPN transistor Q2 is connected in series with one end of the resistor R11, the other end of the resistor R11 is connected in series with the master SDDCF terminal of the master MCU, and the NPN transistor Q2 is connected in series with the positive electrode of the diode D4. The emitter of the N transistor Q2 is grounded, the resistor R12 is connected in parallel to the base of the NPN transistor Q2 and the emitter of the NPN transistor Q2, and the main control QMB terminal of the main control MCU is connected in series between the positive electrode of the diode D4 and the second end of the locking solenoid valve interface; the trigger switch pin interface J8 includes a first end of the trigger switch pin interface and a second end of the trigger switch pin interface, the first end of the trigger switch pin interface is connected in series with the main control TRIG terminal of the main control MCU, one end of the resistor R13 is connected to the second voltage, and the other end of the resistor R13 is connected in series between the first end of the trigger switch pin interface and the main control TRIG terminal of the main control MCU, and the second end of the trigger switch pin interface is grounded.

[0012] In combination with the first aspect, in a possible implementation, it also includes an airtight solenoid valve interface J9, an NPN transistor Q3, a diode D6, a resistor R16 and a resistor R17, the airtight solenoid valve interface J9 includes an airtight solenoid valve interface first end and an airtight solenoid valve interface second end, the positive and negative poles of the diode D6 are connected in parallel to the first end of the airtight solenoid valve interface and the second end of the airtight solenoid valve interface, the collector of the NPN transistor Q3 is connected in series with the positive pole of the diode D6, the base of the NPN transistor Q3 is connected in series with one end of the resistor R16, the other end of the resistor R16 is connected in series with the main control QMDCF terminal of the main control MCU, the emitter of the NPN transistor Q3 is grounded, and the resistor R17 is connected in parallel to the base of the NPN transistor Q3 and the emitter of the NPN transistor Q3.

[0013] In combination with the first aspect, in a possible implementation, the communication module includes a 485 communication chip, a resistor R14, a resistor R15, a resistor R18, a bidirectional breakdown diode Q4, a bidirectional breakdown diode Q5, a bidirectional breakdown diode Q6, a resistor jumper J10, a communication input interface J11 and a communication output interface J12, the communication input interface J11 includes a communication input interface first end and a communication input interface second end, the communication output interface J12 includes a communication output interface first end and a communication output interface second end, the communication output interface J12 is connected in series to the communication input interface J11, the chip R terminal of the 485 communication chip is connected in series with the main control RXD_2 terminal of the main control MCU, the chip RE terminal of the 485 communication chip is connected in series with the main control CTRL terminal of the main control MCU, the chip DE terminal of the 485 communication chip is connected in series with the main control CTRL terminal of the main control MCU, the chip D terminal of the 485 communication chip is connected in series with the main control TXD_2 terminal of the main control MCU, and the 485 The chip VCC terminal of the communication chip is connected to the second voltage, the resistor R14 is connected in parallel to the chip VCC terminal and the chip A terminal of the 485 communication chip, the second end of the communication input interface is connected in series between the resistor R14 and the chip A terminal, the resistor R18 is connected in parallel to the chip B terminal and the chip ground terminal of the 485 communication chip, the first end of the communication input interface is connected in series between the resistor R18 and the chip B terminal, the resistor jumper J10 is connected in parallel to the chip B terminal and the chip A terminal, the resistor R15 is connected in series between the chip B terminal and the resistor jumper J10, one end of the bidirectional breakdown diode Q4 is connected in series between the chip B terminal and the resistor jumper J10, and the other end of the bidirectional breakdown diode Q4 is grounded, one end of the bidirectional breakdown diode Q5 is connected in series between the chip A terminal and the resistor jumper J10, the other end of the bidirectional breakdown diode Q5 is grounded, and the bidirectional breakdown diode Q5 is connected in parallel to the chip B terminal and the chip A terminal.

[0014] In the application of this application, the first voltage can be set to 24V voltage for providing high voltage; the second voltage can be set to 5V voltage for providing low voltage. The detection IO board J5 can be freely extended relative to the main control MCU, so that the detection work can be facilitated. When it is necessary to test the conductivity of the wiring harness to be tested, the two ends of the wiring harness to be tested are inserted into the two test IO ports of the detection IO board, and then the access IO ports of the two main control MCUs are connected to the wiring harness to be tested. The corresponding connected access IO ports can both input and output signals. After the wiring harness to be tested is inserted, the main control MCU outputs a signal from one connected access IO port. If the other connected access IO port can receive a signal, it means that the conductivity of the wiring harness to be tested is normal. There is no need to manually detect each wiring harness, which improves the detection efficiency and reduces the false positive rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a circuit diagram of a power supply module provided in one embodiment of the present application.

[0016] Figure 2 FIG. 1 is an interface diagram of the detection IO board J5 provided in an embodiment of the present application.

[0017] Figure 3 FIG. 1 is a circuit diagram of a reference voltage circuit provided in accordance with an embodiment of the present application.

[0018] Figure 4 Shown is a schematic diagram of an interface of a probe connector provided in an embodiment of the present application.

[0019] Figure 5 Shown is a circuit diagram of multiple interface protection modules provided in one embodiment of the present application.

[0020] Figure 6 FIG. 1 is a circuit diagram of multiple pull-up resistors provided in accordance with an embodiment of the present application.

[0021] Figure 7 FIG. 1 is a circuit diagram of an air pressure sensor interface J3 according to an embodiment of the present application.

[0022] Figure 8 FIG. 1 is a circuit diagram of an airtight meter interface J4 provided in an embodiment of the present application.

[0023] Figure 9 FIG. 1 is a circuit diagram of a setup program download interface J6 according to an embodiment of the present application.

[0024] Figure 10 FIG. 1 is a circuit diagram of a locking solenoid valve interface J7 provided in an embodiment of the present application.

[0025] Figure 11 FIG. 1 is a circuit diagram of setting a trigger switch pin interface J8 provided in an embodiment of the present application.

[0026] Figure 12 FIG. 1 is a circuit diagram of an airtight solenoid valve interface J9 provided in an embodiment of the present application.

[0027] Figure 13 FIG2 is a circuit diagram of a communication module provided in an embodiment of the present application.

[0028] Figure 14 FIG. 1 is a schematic diagram of a switch circuit provided in an embodiment of the present application.

[0029] Figure 15The figure shows an interface diagram of the master MCU provided in one embodiment of the present application. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0031] An exemplary wire harness detection device is as follows:

[0032] Figure 1 Shown is a circuit diagram of a power supply module provided in one embodiment of the present application. Figure 2 FIG. 1 is an interface diagram of the detection IO board J5 provided in an embodiment of the present application. Figure 3 FIG. 1 is a circuit diagram of a reference voltage circuit provided in accordance with an embodiment of the present application. Figure 4 Shown is a schematic diagram of an interface of a probe connector provided in an embodiment of the present application. Figure 5 Shown is a circuit diagram of multiple interface protection modules provided in one embodiment of the present application. Figure 6 FIG. 1 is a circuit diagram of multiple pull-up resistors provided in accordance with an embodiment of the present application. Figure 7 FIG. 1 is a circuit diagram of an air pressure sensor interface J3 according to an embodiment of the present application. Figure 8 FIG. 1 is a circuit diagram of an airtight meter interface J4 provided in an embodiment of the present application. Figure 9 FIG. 1 is a circuit diagram of a setup program download interface J6 according to an embodiment of the present application. Figure 10 FIG. 1 is a circuit diagram of a locking solenoid valve interface J7 provided in an embodiment of the present application. Figure 11 FIG. 1 is a circuit diagram of setting a trigger switch pin interface J8 provided in an embodiment of the present application. Figure 12 FIG. 1 is a circuit diagram of an airtight solenoid valve interface J9 provided in an embodiment of the present application. Figure 13 FIG2 is a circuit diagram of a communication module provided in an embodiment of the present application. Figure 14 FIG. 1 is a schematic diagram of a switch circuit provided in an embodiment of the present application. Figure 15 The figure shows an interface diagram of the master MCU provided in one embodiment of the present application.

[0033] The present application provides a wire harness detection device. In one embodiment, Figures 1 to 15As shown, the wiring harness detection device includes: a power supply module, a main control MCU, a detection IO board J5 and a communication module. The power supply module includes a transformer circuit, the input voltage is connected to the power supply module, the power supply module is used to output a first voltage and output a second voltage through the transformer circuit, the first voltage is greater than the second voltage. The main control MCU includes a main control Vcc terminal, the transformer circuit is connected in series with the main control Vcc terminal to input the second voltage to the main control MCU, and the main control MCU includes multiple access IO ports. The detection IO board J5 includes multiple test IO ports, and the multiple test IO ports are connected in series with the multiple access IO ports through a wiring harness in a one-to-one correspondence. The test IO port is used to plug into the test wiring harness. The detection IO board J5 also includes a detection IO board electrical access interface and a detection IO board ground port. The detection IO electrical access port is connected to the second voltage, and the detection IO board ground port is grounded. The communication module is electrically connected to the communication port of the main control MCU.

[0034] In the application of this embodiment, the first voltage can be set to 24V voltage for providing high voltage; the second voltage can be set to 5V voltage for providing low voltage. The detection IO board J5 can be freely extended relative to the main control MCU, so that the detection work can be facilitated. When it is necessary to test the conductivity of the wiring harness to be tested, the two ends of the wiring harness to be tested are inserted into the two test IO ports of the detection IO board, and then the access IO ports of the two main control MCUs are connected to the wiring harness to be tested. The corresponding connected access IO ports can both input and output signals. After the wiring harness to be tested is inserted, the main control MCU outputs a signal from one connected access IO port. If the other connected access IO port can receive a signal, it means that the conductivity of the wiring harness to be tested is normal. There is no need to manually detect each wiring harness, which improves the detection efficiency and reduces the error rate.

[0035] In one embodiment, if Figure 2 As shown, the number of test IO ports on the IO board J5 is any value between 35 and 65, and the main control MCU includes a corresponding number of access IO ports, so that the conductivity performance of multiple wiring harnesses to be tested can be tested simultaneously. This application takes 48 IO ports as an example.

[0036] In one embodiment, if Figure 1As shown, the power supply module includes: connector J1, connector J2, transformer module U1, a first voltage output terminal, and a second voltage output terminal. The first voltage output terminal is used to output a first voltage, and the second voltage output terminal is used to output a second voltage. Transformer module U1 includes a transformer Vin terminal, a transformer OUTPUT terminal, a transformer ON / OFF terminal, and a transformer FEEDBACK terminal. Connector J2 and connector J1 are connected in series. The transformer Vin terminal is connected in series to the positive output terminal of connector J2. The second voltage output terminal is connected in series to the transformer OUTPUT terminal. The transformer ON / OFF terminal and transformer FEEDBACK terminal are both grounded. The second voltage output terminal is connected in series to the main control Vcc terminal. A diode D1 and a capacitor F1 are connected in series between the positive output terminal of the connector J2 and the transformer Vin terminal, the first voltage output terminal is connected in series with the output terminal of the diode D1, a voltage regulator diode Q1, a capacitor C1, and a capacitor C3 are connected in parallel between the transformer Vin terminal and the transformer ON / OFF terminal, a Schottky barrier diode D2, a capacitor C2, and a capacitor C4 are connected in parallel between the transformer ON / OFF terminal and the transformer OUTPUT terminal, and an inductor L1 is connected in series between the transformer OUTPUT terminal and the second voltage output terminal.

[0037] In one embodiment, if Figure 3 As shown, the wiring harness detection device also includes a reference voltage circuit, which includes a Zener diode Q2, a resistor R1, a resistor R3, a resistor R5, an inductor C8 and an inductor C9. The Zener diode Q2 includes a positive electrode of the Zener diode Q2, a negative electrode of the Zener diode Q2 and a control electrode of the Zener diode Q2. The positive electrode of the Zener diode Q2 is grounded, the negative electrode of the Zener diode Q2 is connected in series with the second voltage output end, the negative electrode of the Zener diode Q2 is connected in series with the reference voltage VREF terminal of the main control MCU, the resistor R1 is connected in series between the negative electrode of the Zener diode Q2 and the second voltage output end, the resistor R3 and the resistor R5 are connected in series with each other and then connected in parallel to the positive electrode of the Zener diode Q2 and the negative electrode of the Zener diode Q2, the inductor C8 is connected in parallel to the positive electrode of the Zener diode Q2 and the negative electrode of the Zener diode Q2, the inductor C9 is connected in parallel to the positive electrode of the Zener diode Q2 and the negative electrode of the Zener diode Q2, and the control electrode of the Zener diode Q2 is connected in series with the line between the resistor R3 and the resistor R5.

[0038] In one embodiment, if Figure 4 As shown, the wiring harness detection device further includes a probe connector P1 and a probe connector P2. The probe connector P1 or the probe connector P2 includes multiple probe IO ports. The multiple probe IO ports are connected in series with the same number of test IO ports in a one-to-one correspondence, which can further facilitate the connection of the wiring harness to be tested. Specifically, Figure 3As shown, connect the probe IO ports on the probe connector to the test IO ports on the test IO board J5 according to the corresponding labels. For example, when testing a wiring harness with multiple IO ports, plug the probe at one end of the wiring harness into the probe connector P1 and the probe at the other end of the wiring harness into the probe connector P2 to perform a wiring harness continuity test.

[0039] In one embodiment, if Figure 5 As shown, the wiring harness detection device also includes multiple interface protection modules, including interface protection modules Q1~Q12, each interface protection module includes multiple protection IO ports, and the multiple protection IO ports are connected in series with the same number of test IO ports in a one-to-one correspondence, which can suppress static electricity on each test IO port. Figure 5 Connect the protective IO ports on the interface protection module to the test IO ports according to the corresponding labels. The interface protection module uses a TVS diode model SP0504BAHTG, which includes a TVS diode ground terminal and four protective IO ports.

[0040] In one embodiment, if Figure 6 As shown, the wiring harness detection device also includes multiple pull-up resistors. One end of the pull-up resistor is connected in series with a test IO port, and the other end of the pull-up resistor is connected to a second voltage. For example, if the detection IO board J5 includes 48 test IO ports, the corresponding number of pull-up resistors is 48, which can effectively improve the anti-interference ability and stability of the test IO ports.

[0041] In one embodiment, if Figure 7 As shown, the wiring harness detection device also includes an air pressure sensor interface J3, an operational amplifier U2, and a resistor R2. The air pressure sensor interface J3 is used to connect to the air pressure sensor. The air pressure sensor interface J3 includes a first end, a second end, and a third end. The first end is connected to the second voltage, the second end is grounded, and the third end is connected in series with the resistor R2 and the op amp +IN terminal of the operational amplifier U2. The op amp OUT terminal of the operational amplifier U2 is connected in series with the op amp -IN terminal and the main control QMI terminal of the main control MCU. The op amp V- terminal of the operational amplifier U2 is grounded, and the op amp V+ terminal of the operational amplifier U2 is connected to the second voltage. The air pressure sensor interface J3 can be used to connect to the air pressure sensor to detect air pressure. The operational amplifier U2 can amplify the signal to improve the signal-to-noise ratio of the air pressure sensor detection signal.

[0042] In one embodiment, if Figure 8As shown, the wiring harness detection device also includes an airtight meter interface J4, a resistor R6 and a diode D3. The airtight meter interface J4 can be used to connect the airtight meter. The airtight meter interface J4 includes a first end of the airtight meter interface, a second end of the airtight meter interface and a third end of the airtight meter interface. The first end of the airtight meter interface is connected to a first voltage, the second end of the airtight meter interface is connected in series with the main control QMB terminal of the main control MCU, the main control QMI terminal of the main control MCU is connected in series with the positive electrode of the diode D3, the negative electrode of the diode D3 and the third end of the airtight meter interface are connected in series, one end of the resistor R6 is connected to a second voltage, and the other end of the resistor R6 is connected in series between the main control QMI terminal and the diode D3.

[0043] In one embodiment, if Figure 9 As shown, the wiring harness detection device also includes a program download interface J6, a resistor R10 and a light-emitting diode D5. The program download interface J6 can be used to connect the data transmission line to update the firmware of the main control MCU. The program download interface J6 includes a first end of the download interface, a second end of the download interface, a third end of the download interface and a fourth end of the download interface. The first end of the download interface is connected to the second voltage, the second end of the download interface is connected in series with the main control TXD terminal of the main control MCU, the third end of the download interface is connected in series with the main control RXD terminal of the main control MCU, the fourth end of the download interface is grounded, one end of the resistor R10 and the positive electrode of the light-emitting diode D5, the negative electrode of the light-emitting diode D5 is grounded, and the other end of the resistor R10 is connected in series between the main control TXD terminal and the second end of the download interface.

[0044] In one embodiment, if Figure 10 and Figure 11As shown, the wiring harness detection device also includes a locking solenoid valve interface J7, an NPN transistor Q2, a diode D4, a resistor R11, a resistor R12, a trigger switch pin interface J8 and a resistor R13. The locking solenoid valve interface J7 includes a locking solenoid valve interface first end and a locking solenoid valve interface second end. The positive and negative electrodes of the diode D4 are connected in parallel to the first and second ends of the locking solenoid valve interface. The collector of the NPN transistor Q2 is connected in series with the positive electrode of the diode D4. The base of the NPN transistor Q2 is connected in series with one end of the resistor R11. The other end of the resistor R11 is connected in series with the main control SDDCF terminal of the main control MCU. The emitter of the NPN transistor Q2 is grounded. The resistor R12 is connected in parallel to the base of the NPN transistor Q2 and the emitter of the NPN transistor Q2. The main control QMB terminal of the main control MCU is connected in series between the positive electrode of the diode D4 and the second end of the locking solenoid valve interface. The trigger switch pin interface J8 includes a first end of the trigger switch pin interface and a second end of the trigger switch pin interface. The first end of the trigger switch pin interface is connected in series with the main control TRIG terminal of the main control MCU. One end of the resistor R13 is connected to the second voltage. The other end of the resistor R13 is connected in series between the first end of the trigger switch pin interface and the main control TRIG terminal of the main control MCU. The second end of the trigger switch pin interface is grounded. In this embodiment, the locking solenoid valve interface J7 can be connected to a locking solenoid valve, which can be used to lock the connector of the wiring harness to be tested or the wiring harness to be tested connected to the detection IO board J5 or the probe connector. For example, a locking structure is provided on the connector of some wiring harnesses to be tested, and a locking solenoid valve is provided on the probe connector, and the connector of the wiring harness to be tested can be locked by the locking solenoid valve. The trigger switch pin interface J8 can be used to connect a trigger switch, which is provided on the detection IO board J5 or the probe connector to detect whether the wiring harness to be tested is plugged in.

[0045] In one embodiment, if Figure 12 As shown, the wiring harness detection device also includes an airtight solenoid valve interface J9, an NPN transistor Q3, a diode D6, a resistor R16, and a resistor R17. The airtight solenoid valve interface J9 includes a first end and a second end. The positive and negative electrodes of the diode D6 are connected in parallel to the first and second ends of the airtight solenoid valve interface. The collector of the NPN transistor Q3 is connected in series with the positive electrode of the diode D6. The base of the NPN transistor Q3 is connected in series with one end of the resistor R16. The other end of the resistor R16 is connected in series with the main control QMDCF terminal of the main control MCU. The emitter of the NPN transistor Q3 is grounded. Resistor R17 is connected in parallel to the base and emitter of the NPN transistor Q3. When an airtight meter is provided, the airtight solenoid valve interface J9 can be used to connect to the exhaust solenoid valve.

[0046] In one embodiment, if Figure 13As shown, the communication module includes a 485 communication chip, a resistor R14, a resistor R15, a resistor R18, a bidirectional breakdown diode Q4, a bidirectional breakdown diode Q5, a bidirectional breakdown diode Q6, a resistor jumper J10, a communication input interface J11 and a communication output interface J12, the communication input interface J11 includes a communication input interface first end and a communication input interface second end, the communication output interface J12 includes a communication output interface first end and a communication output interface second end, the communication output interface J12 is connected in series to the communication input interface J11, the chip R terminal of the 485 communication chip is connected in series with the main control RXD_2 terminal of the main control MCU, the chip RE terminal of the 485 communication chip is connected in series with the main control CTRL terminal of the main control MCU, the chip DE terminal of the 485 communication chip is connected in series with the main control CTRL terminal of the main control MCU, and the chip D terminal of the 485 communication chip is connected in series with the main control TXD_2 terminal of the main control MCU. In series, the chip VCC terminal of the 485 communication chip is connected to the second voltage, the resistor R14 is connected in parallel to the chip VCC terminal and the chip A terminal of the 485 communication chip, the second end of the communication input interface is connected in series between the resistor R14 and the chip A terminal, the resistor R18 is connected in parallel to the chip B terminal and the chip ground terminal of the 485 communication chip, the first end of the communication input interface is connected in series between the resistor R18 and the chip B terminal, the resistor jumper J10 is connected in parallel to the chip B terminal and the chip A terminal, the resistor R15 is connected in series between the chip B terminal and the resistor jumper J10, one end of the bidirectional breakdown diode Q4 is connected in series between the chip B terminal and the resistor jumper J10, and the other end of the bidirectional breakdown diode Q4 is grounded, one end of the bidirectional breakdown diode Q5 is connected in series between the chip A terminal and the resistor jumper J10, the other end of the bidirectional breakdown diode Q5 is grounded, and the bidirectional breakdown diode Q5 is connected in parallel to the chip B terminal and the chip A terminal.

[0047] In one embodiment, if Figure 14 As shown, the wiring harness detection device also includes a switch LX1 and a resistor R4. The switch LX1 includes multiple switch terminals, one switch terminal is connected in series with the resistor R7 and then connected to the second voltage, one switch terminal is grounded, one switch terminal is sequentially connected in series with the resistor R9 and the main control SDDCF terminal of the main control MCU, one switch terminal is connected in series with the main control QMO terminal of the main control MCU, one switch terminal is connected in series with the resistor R8 and then connected to the second voltage, one switch terminal is connected in series with the main control SWITCH terminal of the main control MCU, and one switch terminal is connected in series with the main control PIN terminal of the main control MCU. One end of the resistor R4 is connected to the second voltage, and the other end of the resistor R4 is connected in series between the switch terminal and the main control SWITCH terminal. The switch LX1 can be used to control the on and off of some interfaces, for example, whether the air pressure sensor interface J3 is working, whether the airtight gauge interface J4 is working, whether the locking solenoid valve interface J7 is working, and whether the airtight solenoid valve interface J9 is working.

[0048] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0049] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0050] It should also be noted that in the apparatus, device, and method of the present application, each component or each step can be decomposed and / or recombined, and such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0051] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be applied in the widest sense consistent with the principles and novel features of this utility model.

[0052] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A wire harness detection device, characterized in that: include: A power supply module, comprising a voltage conversion circuit, an input voltage being connected to the power supply module, the power supply module being configured to output a first voltage and output a second voltage through the voltage conversion circuit, the first voltage being greater than the second voltage; A main control MCU includes a main control Vcc terminal, the voltage conversion circuit is connected in series with the main control Vcc terminal to input the second voltage to the main control MCU, and the main control MCU includes a plurality of access IO ports; The detection IO board J5 includes a plurality of test IO ports, wherein the plurality of test IO ports are connected in series with the plurality of access IO ports via a wiring harness in a one-to-one correspondence, and the test IO ports are used to plug into the test harness. The detection IO board J5 also includes a detection IO board electrical access interface and a detection IO board ground port, wherein the detection IO electrical access port is connected to the second voltage, and the detection IO board ground port is grounded; as well as The communication module is electrically connected to the communication port of the main control MCU.

2. The wire harness detection device according to claim 1, wherein: The power supply module includes: a connector J1, a connector J2, a voltage transformation module U1, a first voltage output terminal and a second voltage output terminal, the first voltage output terminal is used to output the first voltage, and the second voltage output terminal is used to output the second voltage; The transformer module U1 includes a transformer Vin terminal, a transformer OUTPUT terminal, a transformer ON / OFF terminal, and a transformer FEEDBACK terminal. The connector J2 and the connector J1 are connected in series. The transformer Vin terminal is connected in series to the positive output terminal of the connector J2. The second voltage output terminal is connected in series to the transformer OUTPUT terminal. The transformer ON / OFF terminal and the transformer FEEDBACK terminal are both grounded. The second voltage output terminal is connected in series to the main control Vcc terminal. A diode D1 and a capacitor F1 are connected in series between the positive output end of the connector J2 and the transformer Vin terminal, the first voltage output end is connected in series with the output end of the diode D1, a voltage regulator diode Q1, a capacitor C1, and a capacitor C3 are connected in parallel between the transformer Vin terminal and the transformer ON / OFF terminal, a Schottky barrier diode D2, a capacitor C2, and a capacitor C4 are connected in parallel between the transformer ON / OFF terminal and the transformer OUTPUT terminal, and an inductor L1 is connected in series between the transformer OUTPUT terminal and the second voltage output end.

3. The wire harness detection device according to claim 2, characterized in that: The device also includes a reference voltage circuit, which includes a Zener diode Q2, a resistor R1, a resistor R3, a resistor R5, an inductor C8, and an inductor C9. The Zener diode Q2 includes an anode, a cathode, and a control electrode. The anode of the Zener diode Q2 is grounded, the cathode of the Zener diode Q2 is connected in series with the second voltage output end, and the cathode of the Zener diode Q2 is connected in series with the reference voltage VREF terminal of the main control MCU. The resistor R1 is connected in series between the cathode of the Zener diode Q2 and the second voltage output end. The resistors R3 and R5 are connected in series with each other and then connected in parallel to the anode and cathode of the Zener diode Q2. The inductor C8 is connected in parallel to the anode and cathode of the Zener diode Q2. The inductor C9 is connected in parallel to the anode and cathode of the Zener diode Q2. The control electrode of the Zener diode Q2 is connected in series with the line between the resistor R3 and the resistor R5.

4. The wire harness detection device according to claim 1, wherein: Also includes: Multiple interface protection modules, each comprising a plurality of protection IO ports, each of which is connected in series with the same number of the test IO ports in a one-to-one correspondence; as well as A plurality of pull-up resistors, one end of each pull-up resistor is connected in series with one of the test IO ports, and the other end of each pull-up resistor is connected to the second voltage.

5. The wire harness detection device according to claim 1, wherein: It also includes a pressure sensor interface J3, an operational amplifier U2 and a resistor R2. The pressure sensor interface J3 is used to connect the pressure sensor. The pressure sensor interface J3 includes a first end of the pressure sensor interface, a second end of the pressure sensor interface and a third end of the pressure sensor interface. The first end of the pressure sensor interface is connected to the second voltage, the second end of the pressure sensor interface is grounded, and the third end of the pressure sensor interface is connected in series with the resistor R2 and the operational amplifier +IN terminal of the operational amplifier U2 in sequence. The operational amplifier OUT terminal of the operational amplifier U2 is connected in series with the operational amplifier -IN ​​terminal and the main control QMI terminal of the main control MCU in sequence. The operational amplifier V- terminal of the operational amplifier U2 is grounded, and the operational amplifier V+ terminal of the operational amplifier U2 is connected to the second voltage.

6. The wire harness detection device according to claim 1, characterized in that: It also includes an airtight meter interface J4, a resistor R6 and a diode D3. The airtight meter interface J4 includes a first end, a second end and a third end of the airtight meter interface. The first end of the airtight meter interface is connected to the first voltage, the second end of the airtight meter interface is connected in series with the main control QMB terminal of the main control MCU, the main control QMI terminal of the main control MCU is connected in series with the positive electrode of the diode D3, the negative electrode of the diode D3 is connected in series with the third end of the airtight meter interface, one end of the resistor R6 is connected to the second voltage, and the other end of the resistor R6 is connected in series between the main control QMI terminal and the diode D3.

7. The wire harness detection device according to claim 1, wherein: It also includes a program download interface J6, a resistor R10 and a light-emitting diode D5. The program download interface J6 includes a first end of the download interface, a second end of the download interface, a third end of the download interface and a fourth end of the download interface. The first end of the download interface is connected to the second voltage, the second end of the download interface is connected in series with the main control TXD terminal of the main control MCU, the third end of the download interface is connected in series with the main control RXD terminal of the main control MCU, the fourth end of the download interface is grounded, one end of the resistor R10 and the positive electrode of the light-emitting diode D5, the negative electrode of the light-emitting diode D5 is grounded, and the other end of the resistor R10 is connected in series between the main control TXD terminal and the second end of the download interface.

8. The wire harness detection device according to claim 1, wherein: It also includes a locking solenoid valve interface J7, an NPN transistor Q2, a diode D4, a resistor R11, a resistor R12, a trigger switch pin interface J8 and a resistor R13, wherein the locking solenoid valve interface J7 includes a locking solenoid valve interface first end and a locking solenoid valve interface second end, the positive electrode and the negative electrode of the diode D4 are connected in parallel to the locking solenoid valve interface first end and the locking solenoid valve interface second end, the collector of the NPN transistor Q2 is connected in series with the positive electrode of the diode D4, the base of the NPN transistor Q2 is connected in series with one end of the resistor R11, the other end of the resistor R11 is connected in series with the main control SDDCF terminal of the main control MCU, the emitter of the NPN transistor Q2 is grounded, the resistor R12 is connected in parallel to the base of the NPN transistor Q2 and the emitter of the NPN transistor Q2, and the main control QMB terminal of the main control MCU is connected in series between the positive electrode of the diode D4 and the second end of the locking solenoid valve interface; The trigger switch pin interface J8 includes a first end of the trigger switch pin interface and a second end of the trigger switch pin interface. The first end of the trigger switch pin interface is connected in series to the main control TRIG terminal of the main control MCU. One end of the resistor R13 is connected to the second voltage, and the other end of the resistor R13 is connected in series between the first end of the trigger switch pin interface and the main control TRIG terminal of the main control MCU. The second end of the trigger switch pin interface is grounded.

9. The wire harness detection device according to claim 1, wherein: It also includes an airtight solenoid valve interface J9, an NPN transistor Q3, a diode D6, a resistor R16 and a resistor R17. The airtight solenoid valve interface J9 includes a first end of the airtight solenoid valve interface and a second end of the airtight solenoid valve interface. The positive and negative poles of the diode D6 are connected in parallel to the first end of the airtight solenoid valve interface and the second end of the airtight solenoid valve interface. The collector of the NPN transistor Q3 is connected in series with the positive pole of the diode D6, the base of the NPN transistor Q3 is connected in series with one end of the resistor R16, the other end of the resistor R16 is connected in series with the main control QMDCF terminal of the main control MCU, the emitter of the NPN transistor Q3 is grounded, and the resistor R17 is connected in parallel to the base of the NPN transistor Q3 and the emitter of the NPN transistor Q3.

10. The wire harness detection device according to claim 1, wherein: The communication module includes a 485 communication chip, a resistor R14, a resistor R15, a resistor R18, a bidirectional breakdown diode Q4, a bidirectional breakdown diode Q5, a bidirectional breakdown diode Q6, a resistor jumper J10, a communication input interface J11 and a communication output interface J12, wherein the communication input interface J11 includes a communication input interface first end and a communication input interface second end, the communication output interface J12 includes a communication output interface first end and a communication output interface second end, the communication output interface J12 is connected in series to the communication input interface J11, the chip R terminal of the 485 communication chip is connected in series with the main control RXD_2 terminal of the main control MCU, the chip RE terminal of the 485 communication chip is connected in series with the main control CTRL terminal of the main control MCU, the chip DE terminal of the 485 communication chip is connected in series with the main control CTRL terminal of the main control MCU, the chip D terminal of the 485 communication chip is connected in series with the main control TXD_2 terminal of the main control MCU, and the chip VC of the 485 communication chip is connected in series with the main control TXD_2 terminal of the main control MCU. The C terminal is connected to the second voltage, the resistor R14 is connected in parallel to the chip VCC terminal and the chip A terminal of the 485 communication chip, the second end of the communication input interface is connected in series between the resistor R14 and the chip A terminal, the resistor R18 is connected in parallel to the chip B terminal and the chip ground terminal of the 485 communication chip, the first end of the communication input interface is connected in series between the resistor R18 and the chip B terminal, the resistor jumper J10 is connected in parallel to the chip B terminal and the chip A terminal, the resistor R15 is connected in series between the chip B terminal and the resistor jumper J10, one end of the bidirectional breakdown diode Q4 is connected in series between the chip B terminal and the resistor jumper J10, and the other end of the bidirectional breakdown diode Q4 is grounded, one end of the bidirectional breakdown diode Q5 is connected in series between the chip A terminal and the resistor jumper J10, the other end of the bidirectional breakdown diode Q5 is grounded, and the bidirectional breakdown diode Q5 is connected in parallel to the chip B terminal and the chip A terminal.

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