Fiber Bragg Grating Micro Vibration Sensor
A fiber grating and sensor technology, applied in instruments, measuring devices, measuring ultrasonic/sonic/infrasonic waves, etc., can solve the problem of easy to break optical fibers, it is difficult to completely eliminate the friction between the L-shaped lever and the rotating shaft, and it is not suitable for weak vibration signal detection, etc. problem, achieve high sensitivity, reduce implementation cost, and reduce difficulty
Active Publication Date: 2018-04-20
LASER RES INST OF SHANDONG ACAD OF SCI
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Problems solved by technology
It is difficult for this type of sensor to completely eliminate the friction between the L-shaped lever and the rotating shaft, so there is a response threshold, which is not suitable for detecting weak vibration signals
In addition, this kind of sensor also has the problem that the optical fiber is easily broken when it is subjected to a large impact
Method used
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[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0022] Such as Figure 1-2 As shown, a kind of fiber grating micro-vibration sensor provided by the present invention comprises: a support 10, such as image 3 As shown, the support 10 is a U-shaped structure, with a first side wall 11 and a second side wall 12, the inner side of the first side wall 11 has a first step 13; the top of the second side wall 12 has a 11. The extended beam 14 is provided with a second step 15 and a third step 16 on the outside of the second side wall 12. An adjusting beam 40 is arranged on the second step 15, and a compensation column 50 is fixedly arranged on the third step 16. ; There is a vertical groove 18 on the second side wall 12, so that the fiber grating 60 passes through; An inverte...
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A fiber grating micro-vibration sensor, which includes a support, the support is a U-shaped structure, with a first side wall and a second side wall, the inner side of the first side wall has a first step; the top of the second side wall has The beam extending to the first side wall is provided with a second step and a third step on the outside of the second side wall, an adjusting beam is provided on the second step, and a compensation column is provided on the third step; the second side wall There is a vertical groove on the top; an inverted T-shaped elastic piece is arranged on the support, the head of the elastic piece is fixed on the first step inside the first side wall, and the tail of the elastic piece is fixedly connected to the upper mass block and the lower mass block; the middle part of the elastic sheet is provided with an upward folded piece, and the first microhole is arranged on the folded piece; the adjustment beam includes a vertical plate and a horizontal plate, a flange is provided at the bottom of the vertical plate, and a guide is provided on the second step. The groove and the flange match the guide groove so that the flange of the adjusting beam pivots in the guide groove; the riser of the adjusting beam is connected with the second side wall of the support through the first fastening screw.
Description
technical field [0001] The invention relates to the technical field of optical fiber sensors, in particular to an optical fiber grating micro-vibration sensor for weak vibration signal detection. technical background [0002] The fiber Bragg grating micro-vibration sensor is a sensor that uses external signals to modulate the fiber Bragg grating, resulting in changes in the strain in the fiber Bragg grating, resulting in a change in the central wavelength of the reflected light, and detecting the acceleration of the external weak vibration signal by detecting the change in the central wavelength . Compared with conventional electromagnetic sensors, fiber grating micro-vibration sensors have obvious advantages in terms of sensitivity, large dynamic range, reliability, and multiplexing capabilities, and can be applied to weak vibration monitoring of equipment, micro-seismic monitoring, vibration security and other fields , has become an important direction for the development...
Claims
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IPC IPC(8): G01H9/00
Inventor 张发祥张晓磊姜劭栋吕蕾刘小会马龙孙志慧王昌
Owner LASER RES INST OF SHANDONG ACAD OF SCI