基于恒流源驱动的热电阻测温电路系统的设计与研究
Thermal resistance temperature circuit system design and research based on the constant current source driver
王新龙1
作者信息
- 1. 青岛科技大学自动化与电子工程学院 山东 青岛 266042
- 折叠
摘要
针对热电阻测温系统中，导线电阻所带来的测量误差难以克服的问题，通过采用恒流源驱动热电阻以及通过加减运算电路来克服导线带来的测量误差，从而获得了具有较高精度的模拟信号。通过STM32对返回的模拟信号进行定时采样滤除干扰后进行AD转换从而获得了较高精度的温度值。
Abstract
RTD temperature measurement system for measuring lead resistance errors brought insurmountable problem by using a constant current source drives the thermal resistance and by adding and subtracting circuit to overcome the measurement error caused by wire, which has won high precision analog signal. After AD conversion of the analog signal by returning timed sampling filter out interference and using STM32 so as to obtain a high accuracy temperature values.
关键词
STM32/恒流源/热电阻Key words
STM32/Constant current source/PT100引用本文复制引用
出版年
2015
NETL
NSTL
维普
万方数据