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介绍了某产品电控系统测试台电压信号发生器系统的组成。系统以单片机为核心处理器,主要由AT89C52、D/A转换模块、CAN总线通讯模块、键盘控制电路及显示电路组成,通过CAN总线为测试台提供所需的4路1~5 V电压信号。电压信号发生器是为电控系统测试台提供模拟的4路电压信号,它可以通过手动调整并显示4路电压信号的电压值,由CAN总线传送给PLC子系统,或者通过CAN总线在测试台操作平台上远程调整4路电压值。电压信号发生器输出误差小、响应时间短。经试验,该系统精度满足使用要求,工作稳定可靠。
This paper introduces the composition of voltage signal generator system of test bed for a certain electronic control system. The system consists of single-chip processor as the core processor, mainly composed of AT89C52, D / A conversion module, CAN bus communication module, keyboard control circuit and display circuit. The system provides 4 channels of 1 ~ 5 V voltage signal for test bench through CAN bus. Voltage signal generator for the electronic control system test bench to provide analog 4-way voltage signal, which can be manually adjusted and displayed 4 voltage signal voltage values from the CAN bus to the PLC subsystem, or through the CAN bus in the test station Remote adjustment of 4 voltage values on the operating platform. Voltage signal generator output error, response time is short. After testing, the accuracy of the system to meet the requirements, work is stable and reliable.