A novel DSP-based LVDT signal conditioner

Ralph M. Ford, Robert S. Weissbach, David R. Loker

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

A novel signal conditioning system for linear variable differential transformers (LVDTs) is presented. This system considers the signals involved in the operation of the LVDT to be analogous to a double sideband suppressed carrier AM (DSBSC-AM) communication system, where the position information is akin to the signal to be transmitted and the input sine wave excitation to the LVDT is akin to the carrier wave. Signal conditioning is achieved through a modified digital signal processor-based Costas receiver. This system has better dynamic response than existing solutions and better noise rejection than commercially available solutions. Static testing of the system using both 4-wire and 5-wire LVDTs verifies that the conditioner meets or exceeds the linearity performance of existing signal conditioning systems over the full-scale operating range. In addition, this system requires no phase compensation network or manual tuning.

Original languageEnglish (US)
Pages (from-to)768-773
Number of pages6
JournalIEEE Transactions on Instrumentation and Measurement
Volume50
Issue number3
DOIs
StatePublished - Jun 1 2001

Fingerprint

transformers
Signal processing
conditioning
Wire
Carrier communication
Digital signal processors
Dynamic response
Communication systems
Tuning
wire
carrier waves
sine waves
wave excitation
Testing
dynamic response
sidebands
rejection
linearity
central processing units
telecommunication

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering

Cite this

Ford, Ralph M. ; Weissbach, Robert S. ; Loker, David R. / A novel DSP-based LVDT signal conditioner. In: IEEE Transactions on Instrumentation and Measurement. 2001 ; Vol. 50, No. 3. pp. 768-773.
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A novel DSP-based LVDT signal conditioner. / Ford, Ralph M.; Weissbach, Robert S.; Loker, David R.

In: IEEE Transactions on Instrumentation and Measurement, Vol. 50, No. 3, 01.06.2001, p. 768-773.

Research output: Contribution to journalArticle

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