LASER DIODE DRIVEN PRESSURE GAUGE |
|---|
| M. Firak |
- Abstract:
- The paper presents the prototype of the membrane pressure gauge with optoelectronical conversion. The main parts of the system are polished metal membrane, plastic (PMMA) 2 m long optical fibres, and the box containing optoelectronic components (laser diode module, beam splitter, photodetectors and op. amps). Pressure changes causing membrane displacement modulate the laser beam conducted by incoming optical fibre. Modulated and reflected beam is conducted through the outgoing optical fibre to the optoelectronical assembly where it is converted into the voltage proportional to the pressure. Two different electronic circuits for the compensation of laser diode light beam intensity fluctuation are compared. The calibration characteristic recorded using mercury filled U-tube manometer in the range from 0 to 0.52 × 105 Pa shows accuracy +/- 0.8 % FS.
- Keywords:
- pressure, measurement, reflective fibre-optical sensor
- Download:
- IMEKO-WC-2000-TC16-P439.pdf
- DOI:
- -
- Event details
- Event name:
- XVI IMEKO World Congress
- Title:
Measurement - Supports Science - Improves Technology - Protects Environment ... and Provides Employment - Now and in the Future
- Place:
- Vienna, AUSTRIA
- Time:
- 25 September 2000 - 28 September 2000