Vorrichtung zur Messung der Temperaturverteilung in optischen Fasern und Verfahren zur Messung der Temperaturverteilung in optischen Fasern

Details

Veröffentlichungs-Nr.

EP2775278

Aktenzeichen

EP14156237

Anmeldetag

21. Februar 2014

Veröffentlichung

29. November 2017

Erteilung

29. November 2017

Rechtsraum

EP

IPC

G01K11/32

Abstract

An optical fiber temperature distribution measurement device for measuring a temperature distribution along a longitudinal direction of an optical fiber is provided. The device includes: a light transmitter configured to input a train of code-modulated light pulses into the optical fiber; a light receiver configured to receive Raman back scattering lights generated by inputting the train of code-modulated light pulses into the optical fiber; a demodulator configured to perform a correlation processing between a measured signal output from the light receiver and a code string associated with a type of the code modulation performed by the light transmitter, and to demodulate the measured signal; a storage storing a correction data to be used to correct a distortion of the measured signal output from the light receiver when an impulsive pulsed light is output from the light transmitter; and a corrector configured to perform a correction to one of the measured signal output from the light receiver and a demodulated signal output from the demodulator, using the correction data stored in the storage.

Anmelder

Firma

Yokogawa Electric Corporation

Land

🇯🇵 Japan

Fachgebiete