Device for measuring a physical quantity by time-division coding
US5408091A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1993 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | Nov 9, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/268
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for measuring a physical quantity by time-division coding includes a source (1) capable of generating light pulses; a coder (2), the position of which depends on the value of the physical quantity, a sensor (4) including apparatus (5) for sending the light pulses to the coder (2) and a receiver (6) for receiving the coded light pulses, and an analyzer (7) for analyzing the coded light pulses connected to the sensor. The source (1) is capable of generating light pulses simultaneously at two different wavelengths (.lambda.1, .lambda.2), and the sensor (4) is provided with apparatus (9a) for separating the light pulses on the basis of their wavelength, the light pulses at a first wavelength (.lambda.1) passing through the sensor (4) and being coded, while the light pulses at a second wavelength (.lambda.2) are returned to the analyzer (7) to constitute pulses for triggering the sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.