An Efficient Linearizing Demodulator Interface for LVDT

IF 2.2 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Bhavesh Raj Singh Nehra;Devika S Kumar;Anoop Chandrika Sreekantan
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引用次数: 0

Abstract

In this letter, we introduce an efficient linearizing demodulator circuit for linear variable differential transformers (LVDTs). A key innovation of this circuit lies in the integration of linearization and demodulation functionalities within simple electronics, while effectively addressing the limitations of traditional LVDT interfaces. It uses a simple saw-tooth excitation for LVDT and incorporates an enhanced inverse synthesis circuit as the core signal conditioner for processing the LVDT's secondary outputs. Further, this approach offers other unique features, including first, compensation for transients, rise-time, and other common LVDT errors, second, low component count, third, non-requirement of precision oscillator and demodulators, and fourth, a broad range. The efficacy of the proposed method was evaluated through simulation and experimental studies, showing a remarkable improvement in linearity (over six times) across a 100 mm span. The developed system achieved a nonlinearity error of 0.9%, a signal-to-noise ratio of 52 dB, and a repeatability error of 0.014%.
一种用于LVDT的高效线性化解调器接口
在本文中,我们介绍了一种用于线性可变差动变压器(lvdt)的高效线性化解调电路。该电路的一个关键创新在于将线性化和解调功能集成在简单的电子器件中,同时有效地解决了传统LVDT接口的局限性。它采用简单的锯齿形LVDT激励,并结合了一个增强的逆合成电路作为处理LVDT二次输出的核心信号调节器。此外,该方法还提供了其他独特的功能,包括首先,补偿瞬态,上升时间和其他常见的LVDT误差,其次,低分量计数,第三,不需要精密振荡器和解调器,第四,宽范围。通过模拟和实验研究评估了所提出方法的有效性,显示出在100 mm跨度内线性度的显着改善(超过6倍)。该系统的非线性误差为0.9%,信噪比为52 dB,重复性误差为0.014%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
IEEE Sensors Letters
IEEE Sensors Letters Engineering-Electrical and Electronic Engineering
CiteScore
3.50
自引率
7.10%
发文量
194
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