Strain-type tension fence sensor based on fiber grating sensing principle

Abstract

The invention discloses a strain-type tension fence sensor based on a fiber grating sensing principle, which comprises a sliding rod, a reciprocating plane cam, a rigid spring mechanism and an equal-strength strain gauge, wherein the fiber grating is fixed on the equal-strength strain gauge; a fence wire rope is fixedly connected with the reciprocating plane cam; the sliding rod is fixed on a fixing seat; the reciprocating plane cam sleeves the sliding rid; the reciprocating plane cam is also connected with a restoring mechanism; the upper surface of the reciprocating plane cam is provided with multiple convex-concave intervals; when the state of the fence wire rope changes, the reciprocating plane cam is driven to translate on the sliding rod; and the rigid spring mechanism comprises a rolling wheel and an ejection rod, the bottom part of the rigid spring mechanism is contacted with the upper surface of the reciprocating plane cam, and the top part of the rigid spring mechanism is contacted with the equal-strength strain gauge through the ejection rod. Thus, monitoring on multiple states such as invasion of the tension fence, slack of the pull rope and failure of the pull rope can be realized.

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...

AI Technical Summary

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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