| A distributed optical fiber bi-directional strain-displacement sensor |
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| 引用本文： | LIU Tiegen,LI Chuan,ZHANG Yimo,JIANG Junfeng,DING Yongkui,DING Sheng,CHENG Yaxiong and ZHENG Guizhong(The Key Laboratory of Optoelectronics Information Science & Technology of Educational Ministry,Institute of Modern Optics Instrument,Tianjin University,Tianjin 300072,China, College of Information and Automatic Engineering,Kunming University of Science and Technology,Kunming 650051,China). A distributed optical fiber bi-directional strain-displacement sensor[J]. 自然科学进展(英文版), 2003, 13(1) |
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| 作者姓名： | LIU Tiegen LI Chuan ZHANG Yimo JIANG Junfeng DING Yongkui DING Sheng CHENG Yaxiong and ZHENG Guizhong(The Key Laboratory of Optoelectronics Information Science & Technology of Educational Ministry Institute of Modern Optics Instrument Tianjin University Tianjin 300072 China College of Information and Automatic Engineering Kunming University of Science and Technology Kunming 650051 China) |
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| 作者单位： | The Key Laboratory of Optoelectronics Information Science & Technology of Educational Ministry，Institute of Modern Optics Instrument，Tianjin University，Tianjin 300072，China; College of Information and Automatic Engineering，Kunming University of Science and Technology，Kunming 650051，China |
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| 基金项目： | Supported by the National Natural Science Foundation of China (60077023)，the National 863 High-Technology Program，the Natural Science Fund of Ministry of Education (Ed-Tec-Bureau 192)，the Key Laboratory of Optoelectronics Information Science & T |
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| 摘 要： | Abstract A distributed optical fiber strain-displacement sensor is developed, which consists of an optical fiber gauge of strain-dis-placement and an optical time domain reflectometer (OTDR). The operational principle is the modulation of fiber loss in OTDR, i. e. thestrain and displacement in monitoring position are obtained from the bending loss of optical fiber bonded on the optical fiber gauge of strain-displacement. After examining the strain and displacement in the cantilever and the micro displacement rack respectively, the result indi-cates that the distributed optical fiber gauge of strain-displacement can monitor strains or displacements in different sensitive lengths. Thekey technique for measuring bi-directional strain-displacement is the pretreatment of bending of the freely suspended optical fibers, whichcan be identified with OTDR by inserting time delay optical fiber.
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A distributed optical fiber bi-directional strain-displacement sensor |
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| Liu Tiegen,LI Chuan,Zhang Yimo,Jiang Junfeng,DING Yongkui,DING Sheng,CHENG Yaxiong,ZHENG Guizhong. A distributed optical fiber bi-directional strain-displacement sensor[J]. Progress in Natural Science, 2003, 13(1) |
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| Authors: | Liu Tiegen LI Chuan Zhang Yimo Jiang Junfeng DING Yongkui DING Sheng CHENG Yaxiong ZHENG Guizhong |
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| Abstract: | A distributed optical fiber strain-displacement sensor is developed, which consists of an optical fiber gauge of strain-displacement and an optical time domain reflectometer (OTDR) . The operational principle is the modulation of fiber loss in OTDR, i.e. the strain and displacement in monitoring position are obtained from the bending loss of optical fiber bonded on the optical fiber gauge of strain-displacement. After examining the strain and displacement in the cantilever and the micro displacement rack respectively, the result indicates that the distributed optical fiber gauge of strain-displacement can monitor strains or displacements in different sensitive lengths. The key technique for measuring bi-directional strain-displacement is the pretreatment of bending of the freely suspended optical fibers, which can be identified with OTDR by inserting time delay optical fiber. |
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| Keywords: | optical fiber bi-directional gauge of strain-displacement optical time domain reflectometer (OTDR) fiber bending loss strain displacement. |
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