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Analysis method for detecting mass concrete crack based on temperature field change

A mass concrete, change detection technology, applied in radiation pyrometry, measuring devices, optical radiation measurement and other directions, can solve the problems of broken temperature measurement lines, high labor intensity, easy to produce cracks, etc., to improve accuracy and reliability. effect of speed

Active Publication Date: 2021-10-01
HUANENG QINMEI RUIJIN POWER GENERATION CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] After the concrete is poured, its internal temperature will rise rapidly. Since the hydration heat of concrete cement is not easy to dissipate quickly, and the heat is stored in the interior, it is easy to cause a large temperature difference between the interior of the concrete and the environment, which is prone to cracks; and the existing The volume of concrete is becoming larger and larger, and there are more and more parts that need to be monitored for temperature. Relying on traditional manual temperature measurement has a huge workload, high labor intensity, and low measurement frequency is not suitable for large-volume concrete temperature monitoring. If the method of temperature measurement by cable transmission is adopted, due to the complex conditions on the construction site, the wiring is inconvenient, and the temperature measurement line is often broken, and it is limited by the distance; and the cracks that have occurred cannot be timely and accurately detected. Analyzing and judging the crack area, resulting in failure to make rescue measures in time
[0003] Based on the above-mentioned technical problems in the temperature measurement of concrete and the calculation of the crack area, there is no relevant solution, so it is urgent to find an effective solution to solve the above problems

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  • Analysis method for detecting mass concrete crack based on temperature field change
  • Analysis method for detecting mass concrete crack based on temperature field change
  • Analysis method for detecting mass concrete crack based on temperature field change

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Experimental program
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Embodiment 1

[0033] refer to figure 1 , as an embodiment of the present invention, provides an analysis method for detecting cracks in mass concrete based on temperature field changes, including:

[0034] S1: Collect the image information of mass concrete, analyze and extract the temperature data of typical feature points in the image information and generate infrared thermal images; what needs to be explained is:

[0035] The collection of image information of mass concrete includes the collection of image information by using an infrared thermal imager.

[0036] Further, the temperature data of typical feature points include:

[0037] Segment the collected image into 64 equal-sized graphics;

[0038] The vertices of each graph are typical feature points, and the temperature data of typical feature points are extracted.

[0039] S2: Based on the temperature data, use multi-parameter inversion technology to invert the thermodynamic parameters of mass concrete, and simulate the temperatu...

Embodiment 2

[0070] This embodiment is the second embodiment of the present invention. This embodiment is different from the first embodiment in that it provides a verification test of an analysis method for detecting cracks in mass concrete based on changes in the temperature field. The technical effect adopted is verified and explained. In this embodiment, the traditional technical solution is used to conduct a comparative test with the method of the present invention, and the test results are compared by means of scientific demonstration to verify the real effect of the method.

[0071] Traditional technical solution: The traditional piezoelectric excitation ultrasonic crack detection method needs to apply a couplant on the concrete surface during detection, which has low detection efficiency and high cost, and its detection accuracy is low due to the influence of couplant and human factors. In order to verify that this method has higher efficiency and accuracy than traditional methods. ...

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Abstract

The invention discloses an analysis method for detecting mass concrete cracks based on temperature field change, and the method comprises the steps: collecting image information of mass concrete, analyzing and extracting temperature data of typical feature points in the image information, and generating an infrared thermal image; according to the temperature data, inverting thermodynamic parameters of the mass concrete by using a multi-parameter inversion technology, and simulating a temperature field and a stress field of the mass concrete; and analyzing the crack condition of the mass concrete based on the temperature field, the stress field and the infrared thermal image, and calculating the crack size by using a customized calibration measuring tool and a perspective transformation formula to complete crack analysis. According to the method, the temperature field information and the influence area of the crack are obtained by adopting an inversion technology and a perspective transformation formula, and the calculation accuracy and speed are improved.

Description

technical field [0001] The invention relates to the technical field of concrete parameter analysis, in particular to an analysis method for detecting cracks in mass concrete based on temperature field changes. Background technique [0002] After the concrete is poured, its internal temperature will rise rapidly. Since the hydration heat of concrete cement is not easy to dissipate quickly, and the heat is stored in the interior, it is easy to cause a large temperature difference between the interior of the concrete and the environment, which is prone to cracks; and the existing The volume of concrete is becoming larger and larger, and there are more and more parts that need to be monitored for temperature. Relying on traditional manual temperature measurement has a huge workload, high labor intensity, and low measurement frequency is not suitable for large-volume concrete temperature monitoring. If the method of temperature measurement by cable transmission is adopted, due to...

Claims

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Application Information

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IPC IPC(8): G01N25/72G01J5/00
CPCG01N25/72G01J5/00G01J2005/0077
Inventor 石伟栋蒋思磊胡俊郭通李强左文武陈常青文作伟杨万辉王东升刘玉成黄明明罗良飞
Owner HUANENG QINMEI RUIJIN POWER GENERATION CO LTD