MEASUREMENT SYSTEM, MEASUREMENT APPARATUS AND MEASUREMENT METHOD

• Main Authors: SAITO MAKOTO, MISUMI EITARO, YANO TAKASHI
• Format: Patent
• Language: English; Japanese
• Published: 08.06.2023
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING

To provide a measurement system, a measurement apparatus and a measurement method capable of measuring a flow velocity at each position on an optical fiber.SOLUTION: According to one embodiment, a measurement system (1) comprises: an object that is provided in a fluid (30) and generates self-excited vibration by the fluid (30); an optical fiber (9) provided in the fluid (30) and detecting the vibration; a light source (21) outputting light P into the optical fiber (9); an acquisition unit (22) that acquires backscattered light generated from the light P in the optical fiber (9), and including a pattern indicating the vibration in a vibration position on the optical fiber (9) to which the vibration of the fluid (30) is transmitted; and a measurement part (23) that measures, from a pattern included in the backscattered light and indicating the vibration, a flow speed of the fluid (30) in the vibration position.SELECTED DRAWING: Figure 2 【課題】光ファイバの位置毎の流速を測定することが可能な測定システム、測定装置及び測定方法を提供する。【解決手段】一実施の形態によれば、測定システム（１）は、流体（３０）中に設けられ、流体（３０）による自励振動を生じさせる物体と、流体（３０）中に設けられ、振動を検知する光ファイバ（９）と、光ファイバ（９）に光Ｐを出力する光源（２１）と、光ファイバ（９）中で光Ｐから生じた後方散乱光であって、流体（３０）の振動が伝った光ファイバ（９）上の振動位置における振動を示すパターンを含む後方散乱光を取得する取得部（２２）と、後方散乱光に含まれる振動を示すパターンから、振動位置における流体（３０）の流速を測定する測定部（２３）と、を備える。【選択図】図２