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Nano-strain-order dynamic optical fiber strain sensing device and sensing method thereof

An optical fiber strain and sensing device technology, which is applied to measurement devices, optical devices, instruments, etc., can solve the problems of high production cost, difficulty in meeting production and application requirements, and complex structure.

Active Publication Date: 2016-07-13
中联金冠信息技术(北京)有限公司
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  • Abstract
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  • Application Information

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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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  • Nano-strain-order dynamic optical fiber strain sensing device and sensing method thereof
  • Nano-strain-order dynamic optical fiber strain sensing device and sensing method thereof
  • Nano-strain-order dynamic optical fiber strain sensing device and sensing method thereof

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Embodiment Construction

[0031] like 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 installed with the polarization controller 3, and the second coupler 6 The reference fiber 4 and the sensing fiber 5 are combined into a bundle and then connected to 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-adjustable, frequency-stabilized, narrow-linewidth continuous laser 1 . The lengths of the reference fiber 4 and the sensing fiber 5 are not equal, and the difference between the two lengths is recorded as L h , L h Depending on the actual application (such as L h = 2 meter...

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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 susceptible to electromagnetic interference, humidity, and other environmental influences, and in some cases even fail to work properly. Optical fiber strain sensing is almost immune to electromagnetic interference, has strong environmental adaptability, and has high sensitivity, even reaching the nε level, which has unparalleled advantages in ultra-precision monitoring. Therefore, the optical fiber strain sensing system is a very promising and practical subject. The current nano-strain variable-level dynamic optical fiber strain sensing device has a complex structure and high manufacturing cost, which is difficult to meet the needs of production applications. SUMMARY OF THE INVENTION [0003] The techni...

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Application Information

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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