Temperature compensated fiber optic pressure sensor

Measuring and testing – Fluid pressure gauge – Photoelectric

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

73708, 25022723, 25023119, G01L 708, G01L 900, G01L 1904

Patent

active

049322630

ABSTRACT:
A pressure sensor comprises a chamber formed from two members micromachined in silicon or a similar substance. The members define a chamber with at least one pressure sensitive membrane and an optic fiber extending through the chamber parallel to the membrane. The membrane may have an optical grating formed thereon which may be coated with a surface plasmon supporting substance. Light is injected into the fiber with a wavelength that couples with the grating on the membrane, either in a Bragg relationship or in coupling to a surface plasmon. The coupling, and thus the light lost from the fiber, varies with separation between the membrane and fiber and thus with the pressure outside the chamber. The members also include a thicker wall which is not pressure sensitive but which couples with an identifiably distinct portion of the light in the optic fiber to provide a temperature compensated reference. The pressure sensor can be made very small and rugged for combustion chamber pressure sensing in an engine and for other uses where very small pressure sensors are required.

REFERENCES:
patent: 4142774 (1977-06-01), Wright
patent: 4268116 (1981-05-01), Schmadel et al.
patent: 4360247 (1981-01-01), Beasley
patent: 4626680 (1986-12-01), Martens
Research Disclosure, Dec. 1988, Microbend Optical Pressure Sensor in Spark Plug.
High Technology, vol. 2, No. 4, Jul./Aug. 1982, pp. 49-56, Fiber Optics Turns to Sensing.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Temperature compensated fiber optic pressure sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Temperature compensated fiber optic pressure sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature compensated fiber optic pressure sensor will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-609279

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.