Wireless Pressure Sensor Using Non-contact Differential Variable Reluctance Transducer
A diaphragm based wireless pressure sensor using a non-contact differential variable reluctance transducer (NC-DVRT) is developed. A NC-DVRT senses the micro displacements of a diaphragm and operates by detecting the change in reluctance of a sense coil with respect to a compensation coil, when brou...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IFSA Publishing, S.L.
2008-12-01
|
| Series: | Sensors & Transducers |
| Subjects: | |
| Online Access: | http://www.sensorsportal.com/HTML/DIGEST/december_08/P_365.pdf |
| Summary: | A diaphragm based wireless pressure sensor using a non-contact differential variable reluctance transducer (NC-DVRT) is developed. A NC-DVRT senses the micro displacements of a diaphragm and operates by detecting the change in reluctance of a sense coil with respect to a compensation coil, when brought in close proximity to a highly conductive material. In the present work, a stainless steel (SS) diaphragm was used as a pressure port and a commercial NC-DVRT was fixed behind it at a distance of 140 μm. Output of the NC-DVRT was digitized using PSoC microcontroller and was transmitted using a wireless RF module. The developed pressure sensor can measure the positional movement of the SS diaphragm in both the directions with an accuracy of 2 μm corresponding to a pressure of 0.1 bar and communicate to a remote PC. |
|---|---|
| ISSN: | 2306-8515 1726-5479 |