基于STM32的三相电表校准装置的设计

Design of three-phase meter calibration device based on STM32

针对常规三相电表校准装置测量精度低、成本高的问题,研究了一种基于STM32F429单片机的三相多功能电表校准装置。该装置硬件电路主要包括电压电流采样量程切换电路、继电器驱动电路、时钟电路、RS232串口通信模块和显示电路。其中电压电流采样量程切换电路将电流和电压互感器采集的电压和电流信号转换成CS5463芯片的测量范围。单片机STM32F429有4个UART串口用作RS232通信,方便与其他外设相连。单片机接收到信号后,将采集到的电压和电流数据显示在TFTLCD电容触摸屏上。软件设计主要是初始化临时变量和配置CS5463的相关寄存器,然后定时采集电压和电流。通过对测试结果的分析和比较,该装置达到了小数点后4位的测量精度。

Aiming at the problems of low measurement accuracy and high cost of conventional three-phase meter calibration device,this paper studies a three-phase multifunctional meter calibration device based on STM32F429 single-chip microcomputer.The hardware circuit of the device mainly includes voltage and current sampling range switching circuit,relay drive circuit,time clock circuit,RS232 serial communication module and display circuit.The voltage and current sampling range switching circuit converts the voltage and current signals collected by the current and voltage transformer into the measurement range of CS5463 chip.There are 4 UART ports for RS232 communication in STM32F429 chip,convenient to connect with other peripherals.After receiving the signal,the voltage and current data collected are displayed on the TFTLCD capacitive touch screen.Software design is mainly to initialize temporary variables and configure the relevant registers of CS5463,and then collect voltage and current at regular intervals.Through the analysis and comparison of the test results,the measurement accuracy of the device reaches 4 decimal places.