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A dynamic optical fiber strain sensing device with nanostrain level

An optical fiber strain and sensing device technology, applied in the field of strain sensing and optical fiber strain sensing, can solve the problems of complex structure, high production cost, and difficulty in meeting production and application requirements, and achieves the effect of strong environmental adaptability and simple structure

Active Publication Date: 2018-04-06
中联金冠信息技术(北京)有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The current nano-strain level dynamic optical fiber strain sensing device has a complex structure and high manufacturing cost, which is difficult to meet the needs of production and application

Method used

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  • A dynamic optical fiber strain sensing device with nanostrain level
  • A dynamic optical fiber strain sensing device with nanostrain level
  • A dynamic optical fiber strain sensing device with nanostrain level

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Embodiment Construction

[0031] Such as figure 1 As shown, the tunable laser 1 is connected to the first coupler 2, and the two split ends of the first coupler 2 are respectively connected to the reference fiber 4 and the sensing fiber 5, wherein the reference fiber 4 is equipped with a polarization controller 3, and the second coupler 6 Combine the reference optical fiber 4 and the sensing optical fiber 5 into one bundle and then connect the data acquisition module 7, the data acquisition module 7 is connected to the data processing module 8, and the synchronous trigger output port of the synchronous trigger module 9 is respectively connected to the tunable laser 1 and the data acquisition module 7. The tunable laser 1 is a frequency-tunable frequency-stabilized narrow-linewidth continuous laser 1 . The reference fiber 4 and the sensing fiber 5 are not equal in length, and the difference between the two lengths is denoted as L h , L h Depending on the actual application (such as L h = 2 meters). ...

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Abstract

The invention discloses a nano-strain-order dynamic optical fiber strain sensing device. A laser device is connected with a first coupler, two beam splitting ends of the first coupler are respectively connected with one end of a reference optical fiber and one end of a sensing optical fiber, a polarization controller is installed on the reference optical fiber, the other end of the reference optical fiber and the other end of the sensing optical fiber are connected with a second coupler, the second coupler is connected with a data acquisition module, the data acquisition module outputs acquired signals to a data processing module, a synchronization triggering output port of a synchronization triggering module is connected with the laser device and the data acquisition module respectively.

Description

technical field [0001] The invention relates to the field of strain sensing, in particular to the field of optical fiber strain sensing. Background technique [0002] Traditional strain sensors are based on strain-electricity, and electrical signals and their devices are easily affected by electromagnetic interference, humidity and other environments, and in some cases even cannot work normally. Optical fiber strain sensing is almost immune to electromagnetic interference, has strong environmental adaptability, and high sensitivity, even reaching nε level, which has incomparable advantages in ultra-precision monitoring. Therefore, the optical fiber strain sensing system is a very promising and practical subject. The current nano-strain level dynamic optical fiber strain sensing device has a complex structure and high manufacturing cost, which is difficult to meet the production and application requirements. Contents of the invention [0003] The technical problem to be s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/16
CPCG01B11/16
Inventor 刘冲冲周正仙杜友武袁扬胜吴朝辉余瑞兰邹翔周瑞
Owner 中联金冠信息技术(北京)有限公司