Automobile electrical signal test method and device

Abstract

The utility model relates to a testing device of the automobile electrical signal, which is characterized in that after an external tapping (4) is connected with an electronic control unit (5) of the automobile or an automobile experiment table (6), or directly connected with the automobile or the automobile experiment table (6), the testing device can directly test the sensor, the actuator and the electrical signal whether the automobile is in running or not. The tests comprise the tests to the resistance, the voltage, the frequency, the pulse width, the duty factor, the oscillography and the breakover of the electrical signal. In fact, the external tapping (4) is a control module which can control the switch-on and switch-off of the inlet and outlet line, the line-to-ground short circuit, and the mutual short circuit among each line through the computer or the remote control. The test panel (2) is changeable and can test the electrical signal for a plurality of automotive type and a plurality of electronic systems of the automobile. The external tapping (4) can be connected with a plurality of test boxes (1) according to the need so as to achieve the group test.

Description

Technical field [0001] The invention relates to a method for measuring electrical signals of a sensor, an actuator and an ECU (Electronic Control Unit) of an automobile electronic control system. Background technique [0002] At present, in the automotive service industry, there is a large shortage of technical personnel who have comprehensively mastered the measurement of automotive electronic control system sensors, actuators, and ECU signals, as well as quantitative and qualitative analysis of these electrical signals. The labor and transportation departments organize skill level assessment and technical assessment, etc. It is also difficult to cover all of these. On the other hand, it is also difficult to directly collect various electrical signals on the car, and it is often necessary to destroy some protective devices on the car. For example, when performing waveform testing, it is necessary to use a threader to pierce the wire; The signal can only be collected by ope...

AI Technical Summary

Problems solved by technology

On the other hand, it is also difficult to directly collect various electrical signals on the car, and it is often necessary to destroy some protective devices on the car. For example, when performing waveform testing, it is necessary to use a threader to pierce the wire; The signal can only be collected by opening the waterproof rubber plug of the harness connector, which can easily damage the original waterproof, dustproof and airtight performance of the car, especially when the car is in a driving state, some electrical signals cannot be picked up and measured at all

[0003] In the vocational education and training of automobile application and service engineering, as well as in the identification and assessment of skill levels, it is necessary to train and assess its actual operation ability. At this time, it is necessary to unplug the electrical plug on the car to measure the relevant electrical signals. If the electrical plug is pulled out Too many times, it is easy to cause early damage and failure of the connector or wiring harness

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