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 language | English |
|---|---|
| Pages (from-to) | 245-251 |
| Number of pages | 7 |
| Journal | Sensors and Actuators, A: Physical |
| Volume | 111 |
| Issue number | 2-3 |
| DOIs | |
| State | Published - 15 Mar 2004 |
| Externally published | Yes |
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