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介绍了一种基于CAN总线的汽车中央接线盒耐压测试系统,使用CAN总线方法连接于工控机与高压矩阵模块之间替代传统的并联控制方法。CAN总线是以双绞线形式连接并且信号以差动方式传送,在软件上采取受控于主控对象之间互动应答控制方式,使受控对象只有在接收到正确命令后才能进行下一步动作,克服了并联控制方法多线、长距离信号传送所带来的弊病,以及干扰和开环引起的误动作等问题。同时也大幅度提高了产品测试稳定性和测试效率,提升了产能。
This paper introduces a CAN central bus terminal voltage withstand test system based on CAN bus. It uses CAN bus method to connect industrial computer and high voltage matrix module instead of the traditional parallel control method. CAN bus is connected in the form of twisted pair and the signal is transmitted in a differential manner, the software takes control of the interactive response control between the master object so that the controlled object can only take the next action after receiving the correct command , Overcoming the shortcomings of the multi-line and long-distance signal transmission of the parallel control method, as well as the problems of disturbances and misoperation caused by open-loop. At the same time, it greatly improves the product testing stability and testing efficiency and enhances the production capacity.