井下供电系统监控对生命财产安全具有重要意义,为解决以往井下监控终端成本高或系统复杂的问题,提出一种基于STM32的电参数监控终端设计方案。首先给出了监控终端的总体设计方案,分别给出了机壳、接线端子、电气隔离本安设计,重点阐述采样电路、模拟输出电路、STM32内部A/D的配置方法以及软件设计流程。针对所设计的装置进行数据测试及误差分析,试验结果表明,该设计方法成本低,准确度高,具有一定的应用价值。 Underground power supply system monitoring is of great significance to life and property safety. To solve the problem of high cost or complicated system of underground monitoring terminal in the past, a design scheme of monitoring terminal based on STM32 is proposed. First, the overall design scheme of the monitoring terminal is given. The chassis, terminals and the electrical isolation intrinsically safe design are given respectively. The sampling circuit, analog output circuit, STM32 internal A / D configuration method and software design flow are mainly discussed. Data testing and error analysis are carried out on the designed devices. The experimental results show that the proposed method has low cost and high accuracy, and has certain application value.