Fiber bragg grating detection system device and method for detecting anchoring force of anchor rod

Abstract

The invention discloses a fiber bragg grating detection system device and method for detecting an anchoring force of an anchor rod. The fiber bragg grating detection system device consists of a fiber bragg grating sensor array, a fiber bragg grating anchor rod dynamometer, a fiber bragg grating demodulator, an optical cable and a computer, wherein the fiber bragg grating anchor rod dynamometer mainly comprises a plurality of fiber bragg grating sensors which are uniformly arranged on an annular elastic body arm and is arranged at the end part of the anchoring end of the anchor rod; meanwhile, the fiber bragg grating sensor array is distributed on a rod body of the anchor rod; the fiber bragg grating sensor array and the fiber bragg grating anchor rod dynamometer are respectively connected with the fiber bragg grating demodulator through the optical cable; and the fiber bragg grating demodulator is connected with the computer. According to the fiber bragg grating detection system device, the real-time detection on the stress of the anchor rod can be realized and the distributed measurement can be realized. The fiber bragg grating detection system device has the advantages of simple structure, convenience in mounting, high detection speed, long-distance monitoring, repeated use and easiness in protection and maintenance, and is widely applied to tunnels and slopes dug for coal mines, metallurgical mines, water conservancy, railways, roads and defense.

Description

technical field [0001] The invention relates to a detection device for detecting and controlling the anchoring quality of an anchor rod, in particular to an optical fiber grating detection system device and a detection method for detecting the anchoring force of an anchor rod through an optical fiber grating to detect the anchoring quality of an anchor rod. Background technique [0002] At home and abroad, anchor bolts are used to stabilize the surrounding rock and slope of caverns and slopes underground or on the ground, and the stability of a large number of roadways, tunnels, and slopes uses bolts to anchor the surrounding rock, especially for underground mining of coal mines, which require a large number of roadways to be excavated underground. According to incomplete statistics, the total length of newly excavated roadways in state-owned large and medium-sized coal mines is as high as 8000km each year, and more than 80% of them are roadways excavated in coal seams. Keepi...

AI Technical Summary

Problems solved by technology

However, these sensors still have shortcomings such as moisture-proof, waterproof, and anti-interference performance, and cannot realize distributed measurement. At the same time, they still cannot meet the real-time detection needs of the project. In addition, the entire detection process has a long period and equipment installation is extremely cumbersome. Defects that cannot be effectively detected for a long time throughout the process

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