Nondestructive testing method of concrete structure

A concrete structure, non-destructive testing technology, applied in the direction of material defect testing, etc., can solve the problems of poor defect depth detection and other problems, achieve the effect of economical detection, improve detection efficiency, and simple operation

Active Publication Date: 2011-06-15
CHONGQING CONSTR ENG MUNICIPAL TRAFFIC ENG
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  • Abstract
  • Description
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Problems solved by technology

However, this patent only achieves good detection of the defect area and the edge of the defect area, but the detection effect of the defect depth is not good

Method used

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Embodiment Construction

[0023] The power of ultrasonic and infrared excitation in the measurement of the non-destructive testing method of the present invention should be fixed in advance. As an optimal choice, the ultrasonic frequency is 20KHZ. In the experiment, the infrared pulse heating source is a dual-channel pulse lamp with a peak power of about 10W.

[0024] The non-destructive testing method of the present invention is based on the original infrared imaging system, and an ultrasonic excitation source is added for the object to be inspected, wherein the original infrared imaging system includes a flashing light, a thermal imager and a computer for corresponding data processing. Follow the steps below to achieve:

[0025] Step 1. Determine the standard part whose depth value of each defect is known as the object to be inspected. Use the ultrasonic probe to continuously apply 20KHz ultrasonic excitation to the object to be inspected for 10ms to 5s. Coupling coating can be applied between the ult...

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Abstract

The invention relates to a nondestructive testing method of a concrete structure, which comprises the steps: based on the original infrared imaging system, an ultrasonic excitation source is additionally arranged on a tested object; after the ultrasonic excitation source is used, infrared pulse excitation continues to be adopted for combining ultrasound damage location with infrared depth analysis, which protects the tested object, avoids detection of the whole thermography area, aims at detection of the determined image processing area, and is beneficial to improving the detection efficiency; and then, a standard part is adopted for sample detection, and the depth information of the tested object is reversely deduced. The nondestructive testing method is feasible, and has low requirement on precision of detection apparatuses.

Description

technical field [0001] The invention relates to the technical field of nondestructive testing, in particular to an infrared imaging nondestructive testing method for concrete structures. Background technique [0002] Infrared thermal wave non-destructive testing technology is a non-destructive testing technology developed after the 1990s. This method is based on thermal wave theory, by actively applying a special mode of controllable thermal excitation to the object to be detected, and using an infrared thermal imager to continuously observe and record the temperature field changes on the surface of the object, and through modern computer technology and image information Processing technology detects, collects, processes and analyzes time-series thermal wave signals to achieve quantitative diagnosis of internal defects or damages. [0003] One of the key technologies of infrared thermal wave non-destructive testing technology is to select heat sources with different charact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/72
Inventor 康庄李泉源谢永辉肖军
Owner CHONGQING CONSTR ENG MUNICIPAL TRAFFIC ENG
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