Semiconductor Optoelectronics, Volume. 41, Issue 4, 566(2020)
Research on New Method of Track Occupancy Detection Based on Strain Sensing of Weak Fiber Bragg Grating Array
In view of the fact that the current monitoring technology of track occupancy detection is easy to be influenced by electromagnetic interference and external environment, and it is difficult to realize large capacity and high density measurement, a new method based on strain sensing of weak fiber grating array is proposed. Firstly, the weak fiber grating array with reflectivity of 0.2‰ and the hybrid multiplexing technology are used to solve the problem of large capacity and high density detection. Secondly, based on the finite element model and wheelrail coupling theory, this paper deduces and analyzes the force on the track and the sensitivity of the sensor. Finally, the packaged fiber grating array is installed on the test site, and the track load experiment is carried out. The experimental results show that the system can accurately identify the axle information, running direction and track occupation information. The system has good reliability and high sensitivity, which provides a new idea for track occupation inspection technology.
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GAN Weibing, AI Lingyun, TU Shiyu, LIU Miao, JIANG Ru. Research on New Method of Track Occupancy Detection Based on Strain Sensing of Weak Fiber Bragg Grating Array[J]. Semiconductor Optoelectronics, 2020, 41(4): 566
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Received: Feb. 18, 2020
Accepted: --
Published Online: Aug. 18, 2020
The Author Email: Weibing GAN (ganweibing@whut.edu.cn)