Strain-type tension fence sensor based on grating wavelength demodulation principle
A wavelength demodulation and strain-type technology, applied in the field of strain-type tension fence sensors, can solve the problems of poor networking ability, limited application range, short life and so on
Active Publication Date: 2019-10-01
WUHAN WUTOS
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Problems solved by technology
[0002] Traditional tension fence sensors are all based on electrical sensors, which have weak anti-interference ability, short life, and poor networking ability. The characteristics of this certificate, such as anti-electromagnetic interference, anti-pollution, corrosion resistance, easy distributed networking, and superior temperature adaptability and stability, have accelerated the application of fiber grating sensing technology in various fields, especially based on The alarm technology based on the grating wavelength demodulation principle is applied in petrochemical, electric power, mine development, communication, large storage, building security and other fields
However, the existing fiber grating alarm sensors are generally based on the principle of vibration, the overall security system is more complicated to build, and the rate of false alarms and false alarms is high, which limits the scope of application
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[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0023] like figure 1 As shown, the strain gauge tension fence sensor based on the principle of grating wavelength demodulation according to the embodiment of the present invention includes a main shaft 1, a rotating space cam 2, a differential spring mechanism 3, a rotation recovery mechanism 4, and a mounting bracket 5 , Equal strength strain gauges 6, fiber gratings 7 and fence wire ropes 8, the whole is a central rotating structure. The function of the rotary recovery mechanism 4 is mainly to give the rotary space cam 2 a restoring force to make it return to the initial position, and the rotary...
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The invention discloses a strain-type tension fence sensor based on a grating wavelength demodulation principle. The sensor comprises a main shaft, a rotation space cam, a differential spring mechanism and an equal-strength strain gauge. The equal-strength strain gauge is fixed with a fiber bragg grating. A fence steel wire rope is partially winded on the main shaft. The rotation space cam sleeves the main shaft and is connected to a rotation recovery mechanism. An upper surface of the rotation space cam is provided with a plurality of concave-convex intervals. When a state of the fence steel wire rope is changed, the main shaft is driven to rotate and the rotation space cam is rotated along with the main shaft. The differential spring mechanism is arranged above the rotation space cam through an installation support. The differential spring mechanism comprises a top rod and a roller. The top rod is contacted with the equal-strength strain gauge. The roller is contacted with an upper surface of the rotation space cam. The sensor can monitor a plurality of states of invasion of a tension fence, stay cord loosening, stay cord failure and the like.
Description
technical field [0001] The invention belongs to the field of optical fiber grating sensing, and in particular relates to a strain-type tension fence sensor based on the principle of grating wavelength demodulation. Background technique [0002] Traditional tension fence sensors are all based on electrical sensors, which have weak anti-interference ability, short life, and poor networking ability. The characteristics of this certificate, such as anti-electromagnetic interference, anti-pollution, corrosion resistance, easy distributed networking, and superior temperature adaptability and stability, have accelerated the application of fiber grating sensing technology in various fields, especially based on The alarm technology based on the grating wavelength demodulation principle is applied in petrochemical, electric power, mine development, communication, large storage, building security and other fields. However, the existing fiber grating alarm sensors are generally based o...
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IPC IPC(8): G01L5/04G01L1/24
Inventor 何光辉董雷李薇
Owner WUHAN WUTOS