高精度温度测量电路设计

摘要

We design a high-precision temperature measurement circuit excited by a constant current source with RTD and thermistor commonly employed in ocean environment detection. We also reduce the measurement error caused by current variation and self-heating. Scene test shows that the circuit satisfies the requirement of ocean environment detection.%针对海洋环境监测中广泛应用的铂电阻和热敏电阻温度传感器，设计了一种以恒流源激励的温度测量电路，解决了因传感器自加热和恒流源波动产生的测量误差。经现场测试，温度测量的精度、一致性都达到设计要求，满足海洋环境监测的实际应用需要。