A test tool for a CAN communication control box for a vehicle

Abstract

The utility model discloses a kind of vehicle CAN communication control box test tool, it is related to CAN communication test technical field. Including detection tool box, power unit, CAN communication detection unit, water pump switch detection unit, heating switch detection unit, flash code feedback detection unit and detection unit, power unit, CAN communication detection unit, water pump switch detection unit, heating switch detection unit and flash code feedback detection unit are connected to detection tool box in parallel, power unit, CAN communication detection unit, water pump switch detection unit, heating switch detection unit and flash code feedback detection unit are also connected with detection unit communication. The utility model does not need to understand CAN communication principle, easy to operate, and detection efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of CAN communication testing technology, and in particular to a testing fixture for an automotive CAN communication control box. Background Technology

[0002] The CAN communication test fixture is a testing device used to test automotive CAN modules, addressing the factory testing requirements of CAN modules. By connecting the automotive CAN module to the CAN test fixture, it automatically tests each function of the CAN module, displays the results on a computer interface, outputs the final test results, and issues a test pass / fail audible signal. However, the current testing method involves manual testing using a CAN card, requiring operators to understand the principles, making the operation extremely inconvenient.

[0003] Therefore, proposing a test fixture for an automotive CAN communication control box to solve the difficulties existing in the prior art is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a testing fixture for a vehicle CAN communication control box, which requires no understanding of the CAN communication principle, is simple to operate, and greatly improves testing efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A test fixture for an automotive CAN communication control box includes a test fixture housing, a power supply unit, a CAN communication test unit, a water pump switch test unit, a heating switch test unit, a flash code feedback test unit, and a test unit.

[0007] The power supply unit, CAN communication detection unit, water pump switch detection unit, heating switch detection unit, and flash code feedback detection unit are connected in parallel to the detection fixture housing. The power supply unit, CAN communication detection unit, water pump switch detection unit, heating switch detection unit, and flash code feedback detection unit are also connected to the detection unit for communication.

[0008] Optionally, the testing fixture housing includes a model selection module, a counting module, and an indicator light module. The counting module and the indicator light module are connected for signal transmission.

[0009] The indicator module includes 6 indicator lights, each of which is connected to the power supply unit, CAN communication detection unit, water pump switch detection unit, heating switch detection unit, flash code feedback detection unit, and detection unit.

[0010] Optionally, the power supply unit includes a power interface and an external power supply, with the power interface connected to the external power supply via a working circuit.

[0011] The CAN communication detection unit includes a communication interface and a communication port of the CAN box under test. The communication interface and the communication port of the CAN box under test are connected through a working circuit.

[0012] The flash code feedback detection unit includes a USB port and a feedback port of the CAN box under test. The USB port and the feedback port of the CAN box under test are connected through a working circuit.

[0013] Optionally, the water pump switch detection unit includes a water pump switch module and a water pump detection module, and the water pump switch module and the water pump detection module are communicatively connected.

[0014] The water pump switch module includes a water pump control port, and the water pump detection module includes a water pump indicator port. The water pump control port and the water pump indicator port are connected in parallel to the CAN box to be tested.

[0015] Optionally, the heating switch detection unit includes a heating switch module and a heating detection module, and the heating switch module and the heating detection module are communicatively connected;

[0016] The heating switch module includes a heating control port, and the heating detection module includes a heating indicator port. The heating control port and the heating indicator port are connected in parallel to the CAN box to be tested.

[0017] As can be seen from the above technical solution, compared with the prior art, this utility model provides a test fixture for a vehicle CAN communication control box, which has the following beneficial effects: 1) This utility model is simple to operate and has a voice broadcast function to remind the tester that the test is completed and output the test results at the same time; 2) This utility model can provide feedback on the test fault points through the computer's host computer software, which is convenient for maintenance; 3) This utility model does not require understanding of the CAN communication principle, is simple to operate, and greatly improves the testing efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 A schematic diagram of the circuit connection for a test fixture for an automotive CAN communication control box provided by this utility model;

[0020] Figure 2 Circuit connection diagram of the test fixture for the vehicle CAN communication control box provided by this utility model;

[0021] Figure 3 A diagram of the test fixture panel provided by this utility model. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figure 1 and Figure 2 As shown, this utility model discloses a test fixture for an automotive CAN communication control box, including a test fixture body, a power supply unit, a CAN communication test unit, a water pump switch test unit, a heating switch test unit, a flash code feedback test unit, and a test unit.

[0024] The power supply unit, CAN communication detection unit, water pump switch detection unit, heating switch detection unit, and flash code feedback detection unit are connected in parallel to the detection fixture housing. The power supply unit, CAN communication detection unit, water pump switch detection unit, heating switch detection unit, and flash code feedback detection unit are also connected to the detection unit for communication.

[0025] Furthermore, refer to Figure 3 As shown, the testing fixture housing includes a model selection module, a counting module, and an indicator light module. The counting module and the indicator light module are connected by signals.

[0026] The indicator module includes 6 indicator lights, each of which is connected to the power supply unit, CAN communication detection unit, water pump switch detection unit, heating switch detection unit, flash code feedback detection unit, and detection unit.

[0027] Specifically, the testing fixture box is also connected to the computer, and the model selection module is a CAN box model selection button.

[0028] Furthermore, the power supply unit includes a power interface and an external power supply. The power interface is connected to the external power supply through a working circuit. The test fixture detects the high and low levels of the power line through the power interface to determine whether there are any problems with incorrect insertion or loose connection of the plug-in.

[0029] The CAN communication detection unit includes a communication interface and a communication port of the CAN box under test. The communication interface is connected to the communication port of the CAN box under test through a working circuit. By receiving the CAN message sent by the CAN box, it determines whether the CAN box has CAN communication.

[0030] The flash code feedback detection unit includes a USB port and a feedback port of the CAN box under test. The USB port and the feedback port of the CAN box under test are connected through a working circuit. The test fixture simulates a fault flash code signal and sends it to the CAN box. The CAN box sends a fault code through CAN messages according to the agreed protocol. Then the CAN box fault code detection function is normal.

[0031] Furthermore, the water pump switch detection unit includes a water pump switch module and a water pump detection module, and the water pump switch module and the water pump detection module are communicatively connected;

[0032] The water pump switch module includes a water pump control port, and the water pump detection module includes a water pump indicator port. The water pump control port and the water pump indicator port are connected in parallel to the CAN box to be tested.

[0033] Specifically, before the switch is turned on, the test fixture checks that the CAN box should not output a water pump switch signal. Then, the test fixture uses the water pump indicator port to send a CAN message to the CAN box to command the water pump to turn on. The CAN box water pump switch outputs a high level, which the test fixture detects. Then, it uses the water pump control port to send a command to turn off the water pump switch via a CAN message. At this point, the CAN box water pump switch should not output a signal. If the test fixture detects no signal output, it determines that the CAN box water pump switch is working normally.

[0034] Furthermore, the heating switch detection unit includes a heating switch module and a heating detection module, and the heating switch module and the heating detection module are communicatively connected;

[0035] The heating switch module includes a heating control port, and the heating detection module includes a heating indicator port. The heating control port and the heating indicator port are connected in parallel to the CAN box to be tested.

[0036] Specifically, before the switch is turned on, the test fixture checks that the CAN box should have no heating switch signal output. Then, it sends a CAN message through the heating indicator port to the CAN box to turn on the heating, and the CAN box heating switch outputs a high level. At this time, the test fixture detects the high level. Then, it sends a heating switch off command through the heating control port via a CAN message. At this time, the CAN box heating switch should have no level signal output. If the test fixture detects no level output, it determines that the CAN box heating switch is working normally.

[0037] In one specific embodiment, the test fixture is powered on, its USB port is connected to the computer, and the CAN box is properly connected to the test fixture. The CAN box test fixture software is opened on the computer interface. A serial port number is selected, and the "Open Serial Port" button is clicked. The status indicator light below the button turns green, indicating successful serial port opening. The "CAN Box Model Selection" button is clicked to select the CAN box model to be tested. The "One-Click Detection" button is then clicked, and the test fixture begins testing. Different units are tested one by one. The indicator light next to a successful step changes from red to green, and the edit box displays "Successful" for that step. The test unit displays the final test result. If all previous steps are successful, the final result displays "Successful." If one or more steps fail, the indicator light next to the failed step remains red, and the edit box below the corresponding step displays "Failed." The test unit then displays "Failed." This test fixture also includes a voice broadcast function, broadcasting the test results while the test unit displays them. The test fixture uses a counting module to count the number of successful and unsuccessful CAN boxes. The test fixture is also connected to a computer, allowing manual adjustment of the count via the computer.

[0038] The above description of the disclosed embodiments is presented in a progressive manner to enable those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A test fixture for a vehicle CAN communication control box, characterized in that, This includes a testing fixture housing, a power supply unit, a CAN communication testing unit, a water pump switch testing unit, a heating switch testing unit, a flash code feedback testing unit, and a testing unit. The power supply unit, CAN communication detection unit, water pump switch detection unit, heating switch detection unit, and flash code feedback detection unit are connected in parallel to the detection fixture housing. The power supply unit, CAN communication detection unit, water pump switch detection unit, heating switch detection unit, and flash code feedback detection unit are also connected to the detection unit for communication.

2. The testing fixture for a vehicle CAN communication control box according to claim 1, characterized in that, The testing fixture housing includes a model selection module, a counting module, and an indicator light module. The counting module and the indicator light module are connected for signal transmission. The indicator module includes 6 indicator lights, each of which is connected to the power supply unit, CAN communication detection unit, water pump switch detection unit, heating switch detection unit, flash code feedback detection unit, and detection unit.

3. The testing fixture for a vehicle CAN communication control box according to claim 1, characterized in that, The power supply unit includes a power interface and an external power supply. The power interface is connected to the external power supply through a working circuit. The CAN communication detection unit includes a communication interface and a communication port of the CAN box under test. The communication interface and the communication port of the CAN box under test are connected through a working circuit. The flash code feedback detection unit includes a USB port and a feedback port of the CAN box under test. The USB port and the feedback port of the CAN box under test are connected through a working circuit.

4. The testing fixture for a vehicle CAN communication control box according to claim 1, characterized in that, The water pump switch detection unit includes a water pump switch module and a water pump detection module, and the water pump switch module and the water pump detection module are communicatively connected. The water pump switch module includes a water pump control port, and the water pump detection module includes a water pump indicator port. The water pump control port and the water pump indicator port are connected in parallel to the CAN box to be tested.

5. The testing fixture for a vehicle CAN communication control box according to claim 1, characterized in that, The heating switch detection unit includes a heating switch module and a heating detection module, and the heating switch module and the heating detection module are communicatively connected. The heating switch module includes a heating control port, and the heating detection module includes a heating indicator port. The heating control port and the heating indicator port are connected in parallel to the CAN box to be tested.

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