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Non-destructive detection method used for anchor rod anchored system

An anchoring system and detection method technology, applied in the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids, complex mathematical operations, instruments, etc., can solve problems such as high price, difficult signal reception, and limited detection depth

Inactive Publication Date: 2008-09-03
CHONGQING UNIV
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Problems solved by technology

The detection range of the electromagnetic wave method is limited and the price is expensive; the propagation distance of the ultrasonic detection method is short, the signal attenuation speed is fast, the signal is difficult to receive, and the detection depth is limited

Method used

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  • Non-destructive detection method used for anchor rod anchored system
  • Non-destructive detection method used for anchor rod anchored system
  • Non-destructive detection method used for anchor rod anchored system

Examples

Experimental program
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Effect test

Embodiment Construction

[0033] Referring to Fig. 1, a kind of non-destructive testing method for bolt anchorage system is characterized in that: the method comprises the following steps:

[0034] (1) The stress wave generator acts on the top of the anchor rod with the excited acoustic wave signal;

[0035] (2) The stress wave sensor obtains the dynamic measurement signal reflected from the bolt anchorage system and transmits it to the signal receiving device;

[0036] (3), the signal receiving device transmits the signal to the microprocessor for wavelet packet analysis;

[0037] (4) Perform intelligent signal processing and analysis on the processed signal.

[0038] The above-mentioned intelligent signal processing analysis is the analysis of the defect position of the bolt or the quantitative analysis of the anchoring quality of the bolt anchorage system.

[0039] The defects of the bolt system usually lead to changes in the observed signals of the system. If certain measures can be taken to elim...

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PUM

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Abstract

A method for nondestructively detecting rock bolt - anchoring system includes acting acoustic signal issued by stress wave generator on top portion of rock bolt, sending dynamic measuring signal reflected form rock bolt - anchoring system to signal receiving unit being used to transmit said signal to microprocessor for carrying out wavelet packet analysis, carrying out intelligent processing and analyzing on signal being analyzed with wavelet packet.

Description

technical field [0001] The invention relates to a non-destructive testing method for a bolt anchorage system. Background technique [0002] The traditional detection method of the anchorage state of the bolt mainly relies on the pullout force test of the bolt. Although this method is suitable for some occasions, it has many shortcomings. This method is not only a destructive detection but also a The pullout force of the bolt cannot fully reflect the anchorage state of the bolt. The application of non-destructive testing technology in the safety evaluation of rock and soil anchorage has been developed with the great development of digital electronic technology and computer technology in recent years. After decades of research and application, a variety of methods have been developed, which can be mainly summarized as follows: Electromagnetic wave method and vibration (seismic wave) ~ ultrasonic detection method. The detection range of the electromagnetic wave method is limi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04G01N35/00G06F17/11
Inventor 张永兴陈建功许明王桂林
Owner CHONGQING UNIV
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