Apparatus for measuring the influence of physical parameters on the length of a path
US4269506A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1979 |
| Grant date | May 26, 1981 |
| Priority date | — |
| Expiry date | Apr 17, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/35345
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a device for determining the influence of physical parameters on the lth of a path, an elastically stretchable optical fiber is guided with minimal pretensioning along the path which is subjected to length changes. The optical fiber is mounted at least sectionally on supports subjected to positional changes with changes in the length of the path. A transit-time measuring device is also provided as part of the measuring device together with the optical fiber. The transit-time measuring device includes a light-pulse repeater forming a closed signal path with the optical fiber. The repeater generates signal pulses circulating in the signal path with the periodicity of the signal circulation time of the signal path. From an electronically measured total travel time through the closed signal path and a total number of which signal pulses the electrical display signal can then be derived to determine the length and change in length of the path being measured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.