摘要
在铂电阻测温电路中 ,采用多基准源进行实时自校正 ,通过对来自多基准源信息的智能化数据处理 ,将测量系统的整体精度提高问题转换为基准源的精度提高问题 ,解决了传统基于桥路测量原理铂电阻测温的局限性。该方法消除了电桥测量原理本身存在的非线性 ,拓宽了测量范围 ,解决了提供电桥基准电流源的温度漂移问题 ,消除了引线电阻所带来的附加误差 ,解决了电桥之后信号调理电路及A/D转换的零点漂移和灵敏度漂移问题 ,从而实现铂电阻测温的高精度和长期稳定性。
The Multi-benchmark resources are used for real-time auto-calibration on Pt resistance temperature measurement.The high precision measurement on entire circuit system is equivalent to that on benchmark resources.The limitation of traditional Pt resistance temperature measurement based on bridge is resolved by dealing with the information from multi-benchmark resources.The intrinsic non-linear of bridge measurement is eliminated and the measurement range is broadened.The temperature drift problem of current resource that provides bridge benchmark is resolved.The additional error caused by wire resistance is eliminated.The zero and sensitivity drift problems of signal measurement circuit and A/D convert are resolved.Consequently high precision and long stability of Pt resistance measurement can be realized.
出处
《仪表技术与传感器》
CSCD
北大核心
2002年第12期26-28,共3页
Instrument Technique and Sensor
关键词
多基准源
自校正
温度漂移
非线性
铂电阻
Multi-benchmark Resources
Auto-calibration
Temperature Drift
Non-linear
