介紹了一種用于海洋石油勘探的反射式強度調(diào)制型光纖壓力傳感器。依據(jù)新穎的網(wǎng)絡(luò)補償技術(shù),提高了強度調(diào)制型光纖傳感器的長期穩(wěn)定性和檢測精度。從理論上描述了測量誤差補償機理。初步的位移測試實驗驗證了所設(shè)計研制的傳感器的正確性和實用性,壓力的測量精度可達到011 MPa。將這種傳感器應(yīng)用于海洋井下壓力的檢測,可具有良好的穩(wěn)定性和極大的實用價值,測量穩(wěn)定性可以達到0115 %。
關(guān)鍵詞　光纖壓力傳感器,激光測量,石油勘探,補償技術(shù)
Abstract 　A novel reflex fiber2optic pressure sensor used in the offshore oil exploration was proposed. Based on the original network compensation technique , the long2term stability and the measurement accuracy of the intensity2modulated fiber2optic sensors were tremendously improved. The error compensation principle of the sensor was theoretically described. Preliminary experimental results indicated the feasibility and practicability , and the estimated pressure measurement accuracy will reach 0. 1 MPa. The measurement stability can reach 0. 15 % when it was applied on the underground crude oil exploration.
Key words 　fiber2optic pressure sensor , laser measurement , offshore oil exploration , compensation technique