基于STM32的新一代遥测终端机的设计与实现

A New Generation Remote Terminal Unit Design and Realization Based on STM32

由于洪水预报和水库优化调度需要用到大量的水文基础数据,遥测终端机(RTU)的性能好坏直接影响整个水情自动测报系统能否达到预期效果。STM32系列芯片由于拥有强大的ARM运算内核、很高的性价比、丰富的外设接口,使其在仪器仪表行业占有很大的份额。该文详细介绍了以STM32为核心的遥测终端机的电路特点和工作原理,并分别介绍了电源电路、SDI-12总线、A/D采集、蓝牙通信四大电路的设计特点。同时介绍其在上下位机交互、工作稳定性等多方面所具备的优势。此遥测终端机已在实际工程中得到了成功应用,其高稳定性和可靠性为水文高级应用提供准确的实时数据。

Because flood forecasting and reservoir optimal operation need a lot of basic hydrological data,the performance of RTU is directly related to whether the whole automatic hydrological forecasting system can achieve the expected effect.STM32 series chips occupy a large share in the instrument industry because of its powerful arm core,high cost performance and rich ecological chain.This paper introduces in detail the circuit structure and working principle of telemetry terminal based on STM32,and introduces the design features of four circuits,power circuit,A/D sampling circuit,SDI-12 bus circuit,blue tooth module circuit and communication circuit.At the same time,it introduces its advantages in the interaction between upper and lower computers,working stability and so on.This telemetry terminal has been successfully applied in practical projects.Its high stability and reliability provide accurate real-time data for advanced hydrological applications.