Automatic test system and device for passive entry passive start (PEPS) bus signal

Abstract

The invention relates to an automatic test system and device for a passive entry passive start (PEPS) bus signal, characterized in the following aspects: two sets of antennas are connected to a PEPS controller through relays respectively. Through the switching manner of the relays, one set of the antennas is chosen to stimulate the position information of an intelligent key relative to an entire vehicle. The intelligent key and a start switch triggering module are driven in such as a way that an electric air pump is connected through a flexible pipe to a push column. The middle part of the flexible pipe is connected with a solenoid valve, and the solenoid valve is connected with a host computer through an I / O control board clamp. An air pressure stimulation module is capable of stimulating the real work conditions of a tire pressure sensor. The host computer testing software chooses different sets of antennas and automatically drives an air pump to push the key, therefore achieving the stimulation of various working conditions of a complete set of system to be tested and achieving the goal of detecting whether the bus signal outputted from the system to be tested is consistent with the real work conditions or not. The system and device can be used to test at the early stage of project development so that problems can be found as early as possible and that developmental costs are reduced.

Description

technical field [0001] The invention relates to a keyless entry system (PEPS) bus signal automatic testing system and device, and relates to the field of CAN bus message signal testing related to the keyless entry system. Background technique [0002] Electronics and intelligence have become the mainstream development trend in the automotive field, and the keyless entry system (PEPS) is one of the typical functions. This function not only appears in high-end models, but also gradually becomes a standard configuration in many low-end and mid-end cars. PEPS system generally includes low-frequency antenna group, smart key, one-button start switch, tire pressure monitoring, door handle and its antenna and controller. The control and status information of the whole system mainly interacts with other assemblies through the CAN bus. [0003] For the above-mentioned keyless entry system, if it is necessary to test and verify the sent bus message, the existing means are mainly to...

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Problems solved by technology

[0004] In order to overcome the above-mentioned deficiencies and improve test coverage and efficiency, the object of the present invention is to provide a keyless entry system (PEPS) bus signal automatic test system and device, which is a set of keyless entry system (PEPS) The automatic detection device of the bus message signal can not only simulate the working environment of the keyless entry system, but also test whether the value range of the message signal changes according to the preset working conditions; it mainly solves the problem of manual verification on the existing real vehicle. The test efficiency is low, the test cycle is long, and it cannot cover all fault conditions; and the test system can intervene in the test at the early stage of project development, find problems earlier, and save development costs; it can also simulate problems that are not easy to manufacture in the real vehicle environment. fault conditions, thereby improving test coverage; the application of automated testing methods can also greatly improve test efficiency

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