Rockbolt length ultrasonic guide-wave detecting instrument

A technology of ultrasonic guided wave and detector, applied in the direction of using ultrasonic/sonic wave/infrasonic wave, re-radiation of sound wave, radio wave measurement system, etc. It can solve the problems of low detection accuracy, messy detection waveform, and difficult detection, etc., and reach the technical level The effect of low requirements, low labor intensity of workers and high detection accuracy
CN1831470AInactive Publication Date: 2006-09-13BEIJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF TECH
Publication Date
2006-09-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

An ultrasonic guided wave detector for detecting length of anchor bolt is prepared as connecting arbitrary function generator to change - over switch through power amplification module, connecting change - over switch to guide wave transmitting - receiving element and gain amplification module, connecting gain amplification module to waveform analysis and display module.
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Description

technical field

[0001] The invention relates to an ultrasonic guided wave detector for the length of a bolt. The device measures the length of a bolt embedded in a medium (such as soil, cement, resin and rock) by using an ultrasonic guided wave nondestructive detection technology, and belongs to the field of nondestructive detection. Background technique

[0002] Water conservancy and hydropower projects, urban construction, highway and railway construction and other projects use a large number of bolt support technology (that is, the bolt is buried in the rock or soil to enhance the support capacity of the rock or soil). Due to the harsh working environment, such as moisture, humid air, rain and other liquids infiltrated into the metal anchor, the stress concentration caused by local corrosion of the anchor results in the breakage of the anchor; or due to the lateral sliding of the soil and rock layers , so that the stress state of the anchor rod changes, from the axial ten...

Claims

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