摘要
针对目前市场上传感器输出信号的非线性和温度失调,提出了以嵌入式微处理器STM32F103为核心,采用先进的溅射薄膜传感器,利用分段最小二乘法来进行非线性补偿的智能压力变送器的设计方案。在此描述了智能压力变送器的整体系统架构,着重阐述了对传感器输出信号智能化补偿原理。测试结果表明,经算法补偿后的模拟输出信号具有良好的线性特性,最大线性误差为0.179%,线性度得到了较大的提高。
In view of non-linearity and temperature imbalance of the output signal from sensors in market, a design scheme of intelligent pressure transmitter is proposed, in whieh the embedded microprocessor STM32F103 is taken as its core, the ad- vanced sputtered thin sensor is adopted, and the segmentation least square method is used to execute nonlinear compensation. The overall system architecture of the intelligent pressure transmitter is described. The intelligent compensation principle of the sensor output signal is elaborated emphatically. The testing results show that the analog output signal compensated by the seg- mentation least square method has a perfect linear characteristic. Its maximum linear error is 0.179%.
出处
《现代电子技术》
2013年第4期141-143,146,共4页
Modern Electronics Technique
基金
航天44所某型号高温测量技术研究项目资助(GK092002 K)
关键词
智能压力变送器
非线性补偿
分段最小二乘法
嵌入式微处理器
intelligent pressure transmitter
nonlinear compensation
segmentation least square method
embedded microprocessor
