摘要
介绍了差动变压器式位移传感器的结构和原理,给出了电感式位移测量装置的系统设计方案。该系统通过FPGA产生稳定的DDS信号作为激励源,经差分电路输出2路平衡信号;通过过采样平均滤波的方法实现噪声抑制;采用线性拟合的方法对非线性数据进行补偿,实现了位移的精确测量,测量精度较高。
The structure and principle of differential transformer-type displacement sensor were introduced,and the system design scheme of the inductive displacement measuring device was given.A stable DDS signal was produced by FPGA as the excitation source,and through differential circuit,two balanced signals were output.Noise suppression was achieved by the method of average over-sampling filter.The nonlinear data was compensated by the linear fitting method,and then the accurate measurement of displacement with a high precision was realized.
出处
《湖北汽车工业学院学报》
2011年第2期46-49,61,共5页
Journal of Hubei University Of Automotive Technology
关键词
差动变压器
DDS信号
过采样
线性拟合
differential transformer
DDS signal
over-sampling
linear fitting
