基于ADμC845的高精度差动变压器变送器设计  

Design of high-precison LVDT transmitter based on ADμC845

作　　者：柏受军[1] 郎朗[1] 尹成竹 

机构地区：[1]安徽工程大学安徽省电气传动与控制重点实验室,安徽芜湖241000 [2]安徽省传感器厂,安徽无为238300

出　　处：《安徽工程大学学报》2013年第3期47-50,共4页Journal of Anhui Polytechnic University

基　　金：安徽高校省级自然科学研究基金资助项目(KJ2011B011);安徽工程大学青年基金资助项目(2009YQ027)

摘　　要：LVDT位移传感器的变送器输出电压值和输入位移量之间存在着非线性,设计和制作线性度较高的传感器比较困难.在分析产生非线性误差主要原因和传统校正方法的基础上,利用单片机软件算法进行非线性校正以提高传感器输出精度.该算法以传感器标定数据为样本,用分段线性插值法求出实际位移量.实验测试结果表明,设计达到了高精度要求,具有良好的应用价值.It is difficult to design and produe the sensor with high linearity, for the linear variable differential transformer （LVDT） displacement sensor measurement circuit has nonlinear relationship between output voltage value of the transmitter and input displacement. By analyzing the main reasons of nonlinear error and the traditional correction method,software compensation algorithm in MCU is employed to improve the accuracy of sensor design. Taking the sensor calibration data as a sample, the actual displacement is calculated by piecewise linear interpolation. Experiment results show that the linearity of the sensor can meet the design requirements, and this method has a good application prospect.

关 键 词：非线性校正 分段线性插值 差动变压器 ADμC845 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]