OFFSET AMOUNT DETERMINATION PROGRAM, OFFSET AMOUNT DETERMINATION METHOD, AND OFFSET AMOUNT DETERMINATION DEVICE

• Main Authors: ABE HIDEKI, KASASHIMA TAKEO
• Format: Patent
• Language: English; Japanese
• Published: 05.10.2022
• Subjects: MEASURING; MEASURING QUANTITY OF HEAT; MEASURING TEMPERATURE; PHYSICS; TESTING; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR

To determine an offset amount (an origin deviation amount) in temperature measurement (double-end measurement) using an optical fiber, without using a heater.SOLUTION: An acquisition unit acquires signal intensity data of a Stokes component ST obtained as a result of CH1 measurement and signal intensity data of the Stokes component ST obtained as a result of CH2 measurement. Also, a calculation unit 52 sets an offset amount to a value between min and max (Fig.11(b)), and repeats a process (Fig.11(c)) of calculating an amount of transmission loss in each section of an optical fiber 30 from the acquired signal intensity data a plurality of times while varying an offset amount. Then, a determination unit determines the offset amount when the sum of the absolute values of the amounts of transmission loss is the smallest as an origin deviation amount in temperature measurement (double-ended measurement) using the optical fiber.SELECTED DRAWING: Figure 11 【課題】加熱機器を用いなくても、光ファイバを用いた温度測定（ダブルエンド測定）におけるオフセット量（原点ずれ量）を決定する。【解決手段】取得部は、ＣＨ１測定の結果得られたストークス成分ＳＴの信号強度データと、ＣＨ２測定の結果得られたストークス成分ＳＴの信号強度データと、を取得する。また、算出部５２は、オフセット量をｍｉｎからｍａｘの間の値に設定して（図１１（ｂ））、取得した信号強度データから光ファイバ３０の各区間の伝送損失量を算出する処理（図１１（ｃ））を、オフセット量を異ならせつつ複数回繰り返す。そして、決定部は、伝送損失量の絶対値の総和が最も小さくなるときのオフセット量を光ファイバを用いた温度測定（ダブルエンド測定）における原点ずれ量として決定する。【選択図】図１１