The application of hyperspectral camera in the measurement of building surface defects

In the field of building science, ensuring the quality and safety of buildings is always the focus and core concern of research. With the continuous development of the construction industry and the increasing requirements of people on the living environment, the accurate detection and evaluation of the surface defects of the house has become very important. Traditional inspection methods for building surface defects, such as artificial naked eye observation and simple measuring tools, often have many limitations, such as strong subjectivity, low detection efficiency, and difficulty in finding potential minor defects. The emergence of hyperspectral camera technology has brought a new opportunity for the measurement of building surface defects. Hyperspectral cameras are able to acquire information about objects in multiple narrow and continuous spectral bands, which can not only provide spatial images of the surface of the house, but also reveal the differences in spectral characteristics of different materials. This unique technical advantage makes it have great application potential in the detection, identification and analysis of housing surface defects. The purpose of this study is to deeply explore the application principle, method and practical effect of hyperspectral camera in the measurement of building surface defects, so as to provide new ideas and technical support for the quality inspection and evaluation in the construction industry.

Take FS-23 imaging high spectrometer with built-in push sweep in color spectrum as an example

Application principle
Hyperspectral cameras work by capturing the light reflected or scattered by a target object and breaking it down into spectral data of different wavelengths. These spectral data reflect the material composition, structure and other characteristics of the surface of the object. In the measurement of building surface defects, the hyperspectral camera can capture the spectral changes caused by aging, damage, pollution, etc., so as to achieve accurate identification of defects.

Application advantage
1. High-precision identification: hyperspectral cameras can capture subtle spectral differences, so they can identify various defects on the surface of the house with high precision, such as cracks, shedding, corrosion, etc.

2. Non-contact measurement: The hyperspectral camera adopts a non-contact measurement method, which will not cause secondary damage to the surface of the house, and also avoid the direct contact of the surveyor with the potentially dangerous environment.

3. Fast and efficient: The hyperspectral camera can complete the scanning and data analysis of the surface of a large area of the house in a short time, which greatly improves the measurement efficiency.

4. Comprehensive analysis: Combined with spectral information and spatial information, the hyperspectral camera can conduct comprehensive analysis of the defects on the surface of the house, including the type, location and severity of the defects, providing strong support for the subsequent repair work.

Application example
In the field of housing detection, hyperspectral cameras can be combined with other modern detection methods, such as acoustic detection, infrared detection, etc., to form a comprehensive detection system. The spectral data obtained through the hyperspectral camera can be integrated with the data of other inspection means to evaluate the structural performance and safety condition of the house more comprehensively.

For example, when detecting the aging of the exterior paint of the house, the hyperspectral camera can capture the spectral changes caused by the aging of the paint surface, combined with the infrared detection method to measure the temperature distribution of the paint surface, which can comprehensively evaluate the degree of aging of the paint and potential safety hazards.

As shown below

In summary, hyperspectral cameras have significant application advantages and broad application prospects in the measurement of building surface defects. With the continuous progress of technology and the reduction of cost, hyperspectral camera is expected to be more widely used and promoted in the field of house inspection.