Blast source based dam nondestructive detecting system

A non-destructive testing and blasting source technology, which is used in measurement devices, geophysical measurements, and analysis of solids using sonic/ultrasonic/infrasonic waves. The effect of simplifying complex problems

Inactive Publication Date: 2007-07-04
CHINA GEZHOUBA GROUP CO LTD +1
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Problems solved by technology

Its disadvantages are as follows: first, the excitation energy of the sound wave is small, and the detection depth range is limited; second, due to the large volume of the dam and complex boundary conditions, it is difficult to analyze the collected data due to the arrangement of instruments on the surface alone; third, there is no permanent monitoring point, which cannot Realize real-time dynamic monitoring
The existing dams also have differential resistance sensors and vibrating wire sensors embedded in them, and the signals emitted by them are used for static observation of the dam, but the instantaneous dynamic changes of the dam cannot be detected.

Method used

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  • Blast source based dam nondestructive detecting system
  • Blast source based dam nondestructive detecting system
  • Blast source based dam nondestructive detecting system

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Embodiment Construction

[0022] The establishment and use of a blast source-based dam hazard detection system on a dam can be implemented in three steps:

[0023] The first step is to give the dam a suitable excitation signal through the blasting source designed according to the characteristics of the dam, and to detect various acoustic parameters of the received elastic wave propagation through the vibration pickup sensor installed on the surface of the dam, and conduct a full-section elastic wave. CT imaging, to achieve the purpose of comprehensive control of defects.

[0024] Step 2: Receive elastic waves from the blasting source through differential resistive sensors and vibrating wire sensors installed in the dam, and combine the vibration pickup sensors to detect various received acoustic parameters through computer processing. Dynamic monitoring to achieve real-time monitoring.

[0025] The third step is to establish a dynamic mechanical analysis model of the dam on the basis of dynamic monito...

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Abstract

The invention discloses a lossless detection system for big bam based on the blasting source that consists of blasting source, receiving system, data recording system and data analyzing and processing system. The receiving system includes differential resistance sensor sets, vibrating wire sensor and geophone laid on the surface of bam. The geometrical position of the blasting source is located on the geometrical center or geometrical centerline. The invention adopts the blasting with known equivalent, and the acoustics parameters of elastic wave are received by the sensor berried on the surface and the interior of bam, then acoustics parameters and waveform change are analyzed by the computer, and the disadvantages and the extent of disadvantages can be determined, and the dynamic monitor for the bam can be realized.

Description

technical field [0001] The invention relates to a nondestructive detection and dynamic real-time safety monitoring system of a concrete dam, in particular to a nondestructive detection system of a dam based on a blasting source. Background technique [0002] The article "Sonic Wave Tomography Detection System for Concrete Dams" in "Dam Safety", No. 2, 2003, discloses a method for detecting the internal defects of concrete dams. The variation of parameters can be used to analyze the location and extent of internal defects in concrete. Its shortcomings: first, the acoustic excitation energy is small, and the detection depth range is limited; second, due to the large size of the dam and the complex boundary conditions, only relying on the surface arrangement of instruments, the data collected is less, and it is difficult to analyze; third, there is no permanent monitoring point, it is impossible to analyze. Real-time dynamic monitoring. In exis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01V1/104
Inventor 周厚贵谭恺炎陈继尧
Owner CHINA GEZHOUBA GROUP CO LTD
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