Expansion interface detection equipment for pure electric commercial vehicle

Abstract

The utility model discloses expansion interface detection equipment for a pure electric commercial vehicle in the field of portable detection equipment, which comprises a connector, a wire harness, a detection PCB (printed circuit board), an upper cover and a bottom shell, the connector and the detection PCB are arranged at two end parts of the wire harness, the connector and the detection PCB are electrically connected with the wire harness through tin soldering, the PCB is arranged in the bottom shell, and the upper cover is arranged on the bottom shell. The bottom shell is connected with the upper cover through a screw; the PCB is connected with a signal interface, a power supply module, a DI detection LED current-limiting resistor, a state display LED, a ground, a CAN module, an output triode, a TXD isolation capacitor, an STB isolation capacitor, a CANL load resistor, a CANH load resistor, a CAN isolation capacitor and a CAN detection LED current-limiting resistor through tin soldering. Detection is carried out through the connector, the technical requirements of operators are reduced, operation is convenient, the result is visual, the detection has no risk to vehicles, and the detection efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the field of portable detection equipment, in particular to an expansion interface detection equipment for a pure electric commercial vehicle. Background Art

[0002] With the rapid development of my country's new energy vehicle industry, the number of pure electric commercial vehicles has continued to increase, especially some electric vehicle operating companies and dealers, which own a large number of vehicles; in order to install some equipment for customers, such as driving recorders, reversing images, etc., the usual method is to find the corresponding power cord and reversing line for installation. This method has certain safety hazards, such as causing a short circuit in the wiring harness and burning the line during use.

[0003] In order to facilitate the after-sales installation of some management equipment, some pure electric commercial vehicles will reserve a standard expansion interface for connecting expansion equipment, such as reversing image equipment, turning warning sound equipment, reversing warning sound equipment, driving recorder equipment, CAN network monitoring equipment, etc.

[0004] The expansion interface needs to be tested when the vehicle leaves the factory or when the customer receives the vehicle for acceptance. Currently, most of the testing methods are to use a multimeter and a computer for testing. This method requires high skills of the operator, is cumbersome to operate, has low testing efficiency, and can easily cause damage to the vehicle if the operation is improper. Therefore, those skilled in the art provide a pure electric commercial vehicle expansion interface testing device to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the utility model is to provide an expansion interface detection device for a pure electric commercial vehicle to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A pure electric commercial vehicle expansion interface detection device comprises a connector, a wiring harness, a detection PCB board, an upper cover and a bottom shell. The connector and the detection PCB board are arranged at two ends of the wiring harness, and the connector, the detection PCB board and the wiring harness are electrically connected through soldering. The PCB board is arranged inside the bottom shell and connected to the bottom shell through screws, and the bottom shell and the upper cover are connected through screws. The PCB board is connected to a signal interface, a power module, a DI detection LED current limiting resistor, a status display LED, a ground, a CAN module, an output transistor, a TXD isolation capacitor, an STB isolation capacitor, a CANL load resistor, a CANH load resistor, a CAN isolation capacitor, a CAN detection LED current limiting resistor, a CAN detection LED and a CAN module output current limiting resistor through soldering.

[0008] Further: The power supply module is connected to the signal interface, and the power supply module is electrically connected to the grounding module and the DI detection LED current-limiting resistor. The DI detection LED current-limiting resistor is connected to the status display LED and then to the grounding module.

[0009] Further: The line where the DI detection LED current-limiting resistor is connected to the power supply module is also connected to the CAN module and the output triode. CAN isolation capacitors, CANL load resistors, and CANH load resistors are respectively connected to the 5th, 6th, and 7th interfaces of the CAN module. A TXD isolation capacitor is connected to the 1st interface of the CAN module. A CAN module output current-limiting resistor is connected to the 4th interface of the CAN module. The CAN module output current-limiting resistor is connected to the output triode. The output triode is also sequentially connected to the CAN detection LED current-limiting resistor and the CAN detection LED. An STB isolation capacitor is connected to the 8th interface of the CAN module.

[0010] Further: The connector is connected to the vehicle-end standard expansion interface, and the combination part of the wire harness, the connector, and the detection PCB board has a protection structure.

[0011] Further: The upper cover is made of transparent material, and the status of the indicator lights inside the internal detection PCB board can be observed.

[0012] Further: The detection PCB board has a signal interface to receive the wire harness signal; the detection PCB board has voltage processing capabilities and is compatible with vehicles with a low-voltage battery of 12 - 24VDC; the detection PCB board has a CAN module capable of detecting the CAN network status; the detection PCB board has LED indicator lights to display the detection results.

[0013] The utility model conducts detection through the connector, reducing the technical requirements for operators, with convenient operation and intuitive results. The detection poses no risk to the vehicle and significantly improves the detection efficiency. Description of the Drawings

[0014] Figure 1 is a structural schematic diagram of the utility model;

[0015] Figure 2 is an exploded view of the utility model;

[0016] Figure 3 is the circuit diagram of the PCB board in the utility model;

[0017] Figure 4 is of the utility model Figure 3 a partial enlarged view of the signal interface part;

[0018] Figure 5 is of the utility model Figure 3 a partial enlarged view of the power supply module part;

[0019] Figure 6 For the present utility model Figure 3 is a partial enlarged view of the TXD isolation capacitor part in it.

[0020] In the figure: 111, connector; 222, wire harness; 333, detection PCB board; 1, signal interface; 2, power module; 3, DI detection LED current-limiting resistor; 4, status display LED; 5, grounding module; 6, CAN module; 7, output triode; 8, TXD isolation capacitor; 9, STB isolation capacitor; 10, CANL load resistor; 11, CANH load resistor; 12, CAN isolation capacitor; 13, CAN detection LED current-limiting resistor; 14, CAN detection LED; 15, CAN module output current-limiting resistor; 444, upper cover; 555, bottom case. Specific embodiments

[0021] Please refer to Figures 1 to 6 , in the embodiment of the present utility model, a detection device for expansion interfaces of a pure electric commercial vehicle includes a connector 111, a wire harness 22, a detection PCB board 33, an upper cover 44, and a bottom case 55. The connector 111 and the detection PCB board 33 are placed at both ends of the wire harness 22, and the connector 111, the detection PCB board 33, and the wire harness 22 are all electrically connected by soldering. The PCB board is placed inside the bottom case 55 and is connected to the bottom case 55 by screws. The bottom case 55 and the upper cover 44 are connected by screws; on the PCB board, a signal interface 1, a power module 2, a DI detection LED current-limiting resistor 3, a status display LED 4, a ground, a CAN module 6, an output triode 7, a TXD isolation capacitor 8, an STB isolation capacitor 9, a CANL load resistor 10, a CANH load resistor 11, a CAN isolation capacitor 12, a CAN detection LED 14 current-limiting resistor 13, a CAN detection LED 14, and a CAN module output current-limiting resistor 15 are connected by soldering.

[0022] By adopting the above technical solution, detection is carried out through the connector 111, reducing the technical requirements for operators, with convenient operation and intuitive results. The detection poses no risk to the vehicle and significantly improves the detection efficiency.

[0023] Among them, the power module 2 is connected to the signal interface 1, and the power module 2 is electrically connected to the grounding module 5 and the DI detection LED current-limiting resistor 3. The DI detection LED current-limiting resistor 3 is connected to the status display LED 4 and then connected to the grounding module 5.

[0024] Among them, the line connecting the DI detection LED current-limiting resistor 3 and the power supply module 2 is also connected to the CAN module 6 and the output triode 7. The CAN isolation capacitor 12, the CANL load resistor 10, and the CANH load resistor 11 are respectively connected to the 5th, 6th, and 7th interfaces of the CAN module 6. The TXD isolation capacitor 8 is connected to the 1st interface of the CAN module 6. The CAN module output current-limiting resistor 15 is connected to the 4th interface of the CAN module 6. The CAN module output current-limiting resistor 15 is connected to the output triode 7. The CAN detection LED 14 current-limiting resistor 13 and the CAN detection LED 14 are successively connected to the output triode. The STB isolation capacitor 9 is connected to the 8th interface of the CAN module 6.

[0025] Among them, the connector 111 is connected to the vehicle-end standard expansion interface, and the combination part of the wire harness 22 and the connector 111 and the detection PCB board 33 has a protection structure.

[0026] Among them, the upper cover 44 is made of a transparent material, and the indicator light state inside the internal detection PCB board 33 can be observed.

[0027] Among them, the detection PCB board 33 has a signal interface 1 to receive the signal of the wire harness 22; the detection PCB board 33 has the voltage processing ability and is compatible with vehicles with a low-voltage battery of 12 - 24VDC; the detection PCB board 33 has a CAN module 6 capable of detecting the CAN network status; the detection PCB board 33 has LED indicator lights to display the detection results.

[0028] The working principle of the present utility model is as follows: There are three types of signals at the vehicle expansion interface, namely power supply signal, switch signal, and CAN signal; after connecting this device to the vehicle, the connector 111 obtains the signal to be detected from the vehicle; the signal to be detected is connected to the PCB signal interface 1 through the wire harness 22; the power supply and switch signals are 12V or 24V DC voltage signals, which are processed by the corresponding power supply module 2; the power supply module 2 has the ability to convert the 12V or 24V DC voltage signal into a 5V DC voltage signal; the 5V DC regulated voltage signal lights the status display LED 4 through the status display LED 4 current-limiting resistor to display the result; the CAN signal is a 2.5V differential signal, with CANH / CANL in pairs; the CAN module 6 adds the TXD isolation capacitor 8 and the STB isolation capacitor 9 to make the CAN module 6 enter the silent standby mode, which can minimize the impact on the vehicle; when a CAN signal is input to the corresponding CAN module 6, the CAN module 6 will pull down the RXD pin according to the CAN data; due to the RXD being pulled down periodically, the PNP-type output triode 7 will conduct periodically; the CAN detection LED 14 will light up periodically.

[0029] Judgment of the detection result:

[0030] (1) When the vehicle starts and the power indicator LED of the present utility model is constantly on, the vehicle power supply is normal;

[0031] (2) When the CAN network indicator LED flashes frequently, the CAN network signal is in a normal state;

[0032] (3) When the vehicle has relevant actions, such as entering the reverse gear, the reverse gear indicator LED of this device should be constantly on, indicating that the reverse gear signal of the vehicle is normal.

[0033] (4) When the CAN indicator LED is constantly on or off, the CAN of this path is abnormal.

[0034] (5) When there is a power signal, the LED corresponding to the switch signal should flash. When it is off, the signal of this path is abnormal.

[0035] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. An expansion interface detection device for a pure electric commercial vehicle, comprising a connector (111), a wire harness (22), a detection PCB board (33), an upper cover (44), and a bottom shell (55), characterized in that: The connector (111) and the detection PCB board (33) are placed at both ends of the wire harness (22), and the connector (111), the detection PCB board (33) and the wire harness (22) are all electrically connected by soldering. The PCB board is placed inside the bottom case (55) and is connected to the bottom case (55) by screws. The bottom case (55) and the upper cover (44) are connected by screws; A signal interface (1), a power module (2), a DI detection LED current-limiting resistor (3), a status display LED (4), a ground connection, a CAN module (6), an output triode (7), a TXD isolation capacitor (8), an STB isolation capacitor (9), a CANL load resistor (10), a CANH load resistor (11), a CAN isolation capacitor (12), a CAN detection LED (14) current-limiting resistor (13), a CAN detection LED (14), and a CAN module output current-limiting resistor (15) are connected to the PCB board by soldering.

2. The extension interface detection device for a pure electric commercial vehicle according to claim 1, characterized in that: The power module (2) is connected to the signal interface (1), and the power module (2) is electrically connected to the ground module (5) and the DI detection LED current-limiting resistor (3). After the DI detection LED current-limiting resistor (3) is connected to the status display LED (4), it is connected to the ground module (5).

3. The detection device for the expansion interface of a pure electric commercial vehicle according to claim 1, characterized in that: On the line where the DI detection LED current-limiting resistor (3) is connected to the power module (2), it is also connected to the CAN module (6) and the output triode (7). A CAN isolation capacitor (12), a CANL load resistor (10), and a CANH load resistor (11) are respectively connected to the 5th, 6th, and 7th interfaces of the CAN module (6). A TXD isolation capacitor (8) is connected to the 1st interface of the CAN module (6). A CAN module output current-limiting resistor (15) is connected to the 4th interface of the CAN module (6). The CAN module output current-limiting resistor (15) is connected to the output triode (7). The output triode is also sequentially connected to the CAN detection LED (14) current-limiting resistor (13) and the CAN detection LED (14). An STB isolation capacitor (9) is connected to the 8th interface of the CAN module (6).

4. The expansion interface detection device for a pure electric commercial vehicle according to claim 1, characterized in that: The connector (111) is connected to the vehicle-end standard expansion interface, and the joint part of the wire harness (22) with the connector (111) and the detection PCB board (33) has a protection structure.

5. The expansion interface detection device for a pure electric commercial vehicle according to claim 1, characterized in that: The upper cover (44) is made of a transparent material.

6. The extension interface detection device for a pure electric commercial vehicle according to claim 1, characterized in that: The detection PCB board (33) has a signal interface (1) for receiving signals from the wire harness (22); the detection PCB board (33) has voltage processing capabilities and is compatible with vehicles with a low-voltage battery of 12 - 24VDC; The detection PCB board (33) has a CAN module (6) capable of detecting the CAN network status; the detection PCB board (33) has LED indicators.

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