Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

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

Inactive Publication Date: 2006-09-13
BEIJING UNIV OF TECH
View PDF0 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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 tensile stress to the transverse shear stress, and finally the anchor rod is sheared and fails
In order to seek improper benefits, individual construction parties often shorten the length of the bolt without authorization, so that it cannot reach the designed bearing strength, causing potential accidents to geotechnical engineering
Due to the strong concealment of these methods, it is very difficult to effectively detect them.
[0003] The existing bolt detector adopts the audio frequency stress wave detection method, the detection waveform is relatively messy, difficult to identify, has the disadvantages of poor repeatability and low detection accuracy, and cannot meet the actual engineering detection needs
Therefore, an ultrasonic guided wave non-destructive testing method can be used. This method requires the design of a special device, which has not been seen so far.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rockbolt length ultrasonic guide-wave detecting instrument
  • Rockbolt length ultrasonic guide-wave detecting instrument
  • Rockbolt length ultrasonic guide-wave detecting instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Specific embodiments of the present invention, specific structure see Figure 1 ~ Figure 3 , the device mainly consists of an arbitrary function generator module 1, a power amplification module 2, a transfer switch module 3, a guided wave transceiver element 4, a gain amplification module 5, and a waveform analysis and display module 6. Wherein, the arbitrary function generator module 1 is connected with the transfer switch module 3 through the power amplification module 2, and the transfer switch module 3 is connected with the waveguide transceiver element 4 and the gain amplification module 5, and the gain amplification module 5 is connected with the waveform analysis and display module 6 . The waveguide transceiver element 4 uses a common piezoelectric transducer, electromagnetic ultrasonic probe or single crystal probe, which is used as a transmitting element when transmitting and as a receiving element when receiving.

[0021] like figure 1 As shown, the anchor r...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01B17/00G01S15/02
Inventor 何存富孙雅欣吴斌王秀彦黄垚张青
Owner BEIJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products