Remote temperature and thermal expansion sensing using the time delay mode of position sensors

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Lateral effect position sensors are used in the time delay (TD) mode for temperature sensing and thermal expansion measurements. The TD mode operation avoids the need for signal normalisation, thus achieving better resolution and dynamic range over the voltage difference mode of operation. We demonstrate the measurement of the relative expansion of solids with accuracy better than 1% using heated copper rod. When the thermal expansion coefficient is known, the device can be used as a high-resolution, remotely operated, fast temperature sensor. Excellent agreement is obtained between measured and calculated quantities based on the dynamic equation that approximates the PSD as a distributed RC transmission line.

Original languageEnglish
Pages (from-to)245-251
Number of pages7
JournalSensors and Actuators, A: Physical
Volume111
Issue number2-3
DOIs
StatePublished - 15 Mar 2004
Externally publishedYes

Keywords

  • Optoelectronic devices
  • Position sensors
  • Temperature sensors
  • Thermal expansion

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

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