GB/T 47174-2026Terminology of optical fibre sensing technology (English PDF)

3.1

The technology of using optical fiber as the transmission or sensing medium and utilizing optical properties to sense the parameters to be measured.

Note. It is divided into discrete fiber optic sensing technology and distributed fiber optic sensing technology.

3.2 optic fiber sensor

A sensor that uses optical fibers to sense and/or transmit external parameters to be measured (physical quantities, geometric quantities, chemical quantities, etc.).

Note. The parameters to be measured are loaded onto the optical wave by modulating the parameters (wavelength, frequency, light intensity, phase, polarization, etc.) of the light wave transmitted in the optical fiber.

3.3

Fiber optic sensors (3.2) are composed of optical fibers as sensing elements.

3.4

Fiber optic sensors that use optical fiber only as a medium for optical transmission (3.2).

3.5

The optical signal modulated by the fiber optic sensor (3.2) is converted into an electrical signal, and the analysis of the measured parameter information is obtained through sampling and signal processing.

Device.

3.6

The parameter to be measured is measured by one or more independent fiber optic sensors (3.2), and the fiber optic sensor signal is demodulated by the optical signal transmitted back through the fiber optic cable.

Technology (3.1).

3.7

Spatially resolved measurements of the parameters to be measured are performed over an extended region using continuous optical fibers, and the optical signals transmitted back through the fibers are demodulated.