关键词: 板载继电器, 寿命测试, 故障诊断, RS-232通信, 嵌入式

Abstract: In order to actually test whether the onboard relay can meet the requirements of the service life and improve the stability and reliability of the onboard relay products, an embedded onboard relay life test system is designed to test the mechanical and electrical life of the on-board relay. In terms of system structure, it is divided into two parts: the lower computer and the upper computer. Based on the embedded system, the lower computer completes the drive of the onboard relay and the construction of the peripheral logic circuit by way of the main control module, collects the contact state of the relay to be measured in the process of action and codes the fault information, and transmits the coded fault information to the upper computer through RS-232 communication. The upper computer is designed with C# programming language, and has the functions of storing, analyzing and displaying the coded fault information. Finally, the feasibility and practicability of the system in information acquisition, data communication and fault diagnosis are verified through system joint debugging.

Key words: onboard relay, life test, fault diagnosis, RS-232 communication, embedded