现代电子技术2011，Vol.34Issue(2)：26-28,3.
LVDT数字解调方法研究
Design of Digital Demodulation System Based on LVDT
摘要
Abstract
A digital demodulation system based on LVDT is presented.A digital demodulation system on the basis of FPGA embedded system platform is proposed to accurately detect the location of core.Different from previous methods, not only the add and subtract methods, but also the methods of detection rate are used for the obtained signal from a secondary coil.In this paper, the linear coefficient is obtained by multi-point measurement, the linear interpolation algorithm is employed to calculate the values of error correction, and one kind of mapping is adopted to obtain the true displacement of core.All of the shortcomings of the analog circuit are overcome.The error is greatly reduced and the linearity is increased by the method.The experiment shows that the accuracy of the digital demodulation system is up to 3×10-4.关键词
LVDT/数字解调/FPGA/铁芯分类
信息技术与安全科学引用本文复制引用
范宇,谢雪松,吕长志,张小玲..LVDT数字解调方法研究[J].现代电子技术,2011,34(2):26-28,3.
