Sensor arrangement
US11397106B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 6, 2018 |
| Grant date | Jul 26, 2022 |
| Priority date | — |
| Expiry date | May 27, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/1789
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fiber optic sensor arrangement is disclosed that includes a plurality of optical fiber based sensor elements, the sensor elements configured to modify an associated optical carrier signal in accordance with changes in a sensed quantity at a location of the sensor element and a phase modulation arrangement for phase modulating each optical carrier signal in accordance with respective uncorrelated pseudorandom binary sequence signals. The sensor arrangement also includes an interferometer module for receiving each of the phase modulated optical carrier signals, the interferometer module operable to convert a change in the phase modulated optical carrier signals to a change in optical intensity of the corresponding optical carrier signal to generate a combined modulated optical intensity signal, an optical intensity detector for measuring the combined modulated optical intensity signal and generating a time varying electrical detector signal and an analog to digital convertor to convert the time varying electrical detector signal to a time varying digitized detector signal. Also included in the sensor arrangement is a decorrelator arrangement for decorrelating the time varying digit…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.