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Building thermal performance detection method based on three-dimensional infrared thermal imaging technique

A technology of infrared thermal imaging and thermal performance, which is applied in the field of detection, can solve problems such as the inability to accurately obtain the spatial coordinate information of the defect position, and the difficulty of accurately reflecting the three-dimensional information of the detection object.

Active Publication Date: 2018-09-14
JILIN JIANZHU UNIVERSITY
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Problems solved by technology

However, it is difficult for infrared images to accurately reflect the three-dimensional information of the detected object, and it is impossible to accurately obtain the spatial coordinate information of the defect location

Method used

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  • Building thermal performance detection method based on three-dimensional infrared thermal imaging technique
  • Building thermal performance detection method based on three-dimensional infrared thermal imaging technique
  • Building thermal performance detection method based on three-dimensional infrared thermal imaging technique

Examples

Experimental program
Comparison scheme
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Embodiment

[0068] Example: Set the maximum temperature on the infrared thermal image to 29.8°C and the minimum temperature to 0°C. According to the detection environment conditions and local conditions, select a certain area without thermal performance defects. The measured temperature range ranges from 10°C to 15°C. The temperature range of the area without thermal performance defects, and take the average value of 10°C-15°C, take the range of 10°C-15°C as the base point temperature range, and within the range of 29.8°C-0°C, divide according to the difference of the base point temperature range 0°C-5°C, 5°C-10°C, 10°C-15°C, 15°C-20°C, 20°C-25°C, 25°C-30°C, and different temperature ranges are represented by different shades of colors.

[0069] In the coordinate conversion mapping process described in step (5), the coordinate conversion satisfies the following relationship: the camera coordinate system (X c , Y c ,Z c ),Z c The axis direction is the same as the camera optical axis dir...

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Abstract

The invention relates to a building thermal performance detection method based on a three-dimensional infrared thermal imaging technique, and aims to solve the problem that a method for detecting andevaluating an overall building enclosure structure thermal performance by combining a thermal infrared imager and a three-dimensional scanner is absent at the present stage. The method includes the steps: shooting station determination; shooting area dividing and shooting; infrared image splicing and temperature interval dividing; three-dimensional point cloud data processing and modeling; three-dimensional infrared imaging superposition; thermal performance calculation; man-machine interaction; analysis evaluation. According to the method, a three-dimensional laser scanner and an infrared camera are combined to detect a building enclosure structure, a defect location can be accurately determined, or information of the defect location can be accurately acquired, and the shortcoming of a traditional infrared detection technique is overcome.

Description

technical field [0001] The invention relates to a detection method, in particular to a building thermal performance detection method based on three-dimensional infrared thermal imaging technology. Background technique [0002] With the gradual improvement of people's living standards, the proportion of building energy consumption in the total building energy consumption is gradually increasing. The key to solving the problem of building energy consumption is building energy conservation. Therefore, in recent years, various places have successively issued evaluation standards for building envelope structures such as green buildings or energy-saving buildings. The detection and evaluation of the thermal performance of built buildings and building envelope structures is not only a technical difficulty and a research focus, but also a way to promote energy conservation faster. An important measure of the building. [0003] Traditional detection methods can no longer meet the ne...

Claims

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Application Information

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IPC IPC(8): G01N25/72
CPCG01N25/72
Inventor 杨金钢曹东旭蒋迪邓兰西李御锋
Owner JILIN JIANZHU UNIVERSITY
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