Fiberoptic sensing of temperature and/or other physical parameters
US4752141A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1986 |
| Grant date | Jun 21, 1988 |
| Priority date | — |
| Expiry date | Oct 22, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/431
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Several specific types of optical sensors capable of measuring temperature, pressure, force, acceleration, radiation and electrical fields, fluid level, vapor pressure, and the like, are disclosed, along with an electro-optical system for detecting the optical signal developed by the sensor. One such probe utilizes a convex shaped structure consisting of an elastomeric material attached to an end of an optical fiber, the elastomeric material being coated with a luminescent material, a combination that is capable of measuring both temperature and pressure. Such a probe is also specifically adapted for measuring surface temperature by making a good physical contact with the surface being measured. Another such probe utilizes a similar structure but of a non-elastomeric material for the purpose of detecting both temperature and either index of refraction of vapor pressure changes. Improvements in other existing sensors of a wide variety of physical parameters other than temperature are also described wherein temperature is simultaneously measured for correcting such physical parameter measurements that are affected by temperature variations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.