Optical fiber angle position sensor
US4384203A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 1981 |
| Grant date | May 17, 1983 |
| Priority date | — |
| Expiry date | May 18, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical fiber position sensor wherein a first member is rotationally movable with respect to a second member. A generally rod-shaped fiber optic cable is provided having two elongated portions in close axial alignment. The interface surfaces of the two portions have equal face angles of approximately 30-35 degrees from the longitudinal axis. One of the cable portions is secured to the first member and the other cable portion is secured to the second member. When the interface surfaces are parallel, most of the radiation received into the first cable portion from a source of electromagnetic radiation, an LED, is transmitted through to the second cable portion, and when the interface surfaces are non-parallel as a function of the rotation of one of the members with respect to the other, radiation will be reflected at the interface surfaces of the second cable portion in varying amounts as a function of angular displacement of the cable portion relative to the first cable portion, such resulting in attentuation of radiation being transmitted through the cable, that radiation being representative of the location of the movable member with respect to the fixed member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.