Application of an FFT-based algorithm to signal processing of LVDT position sensors

被引：34

作者：

Crescini, D ^{[1
]}

Flammini, A ^{[1
]}

Marioli, D ^{[1
]}

Taroni, A ^{[1
]}

机构：

[1] Univ Brescia, Dept Elect Automat, I-25123 Brescia, Italy

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 1998年 / 47卷 / 05期

关键词：

differential transformers; digital signal processors; discrete Fourier transforms; displacement measurement; magnetic transducers; spectral analysis;

D O I：

10.1109/19.746567

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper presents a new method for signal processing of linear variable differential transformer (LVDT) position sensors. Based on a spectral estimation of the differential secondary signal, the method has been implemented using a floating-point digital signal processor (DSP) and a 14-bit analog interface circuit (AIC) to generate the primary signal and to process the primary and the secondary signals. Compared with the classic solution based on synchronous demodulation the resulting accuracy is improved. Heavy filtering is not required, except for the anti-aliasing function. The algorithm decreases the measuring time and offers diagnostic capability.

引用

页码：1119 / 1123

页数：5