The surface roughness can be detected and evaluated using an infrared thermal imager, especially in some specific application areas such as material inspection, engineering quality control, and thermal industry.
An infrared thermal imager is a device that can capture and display the thermal radiation distribution on the surface of an object. The surface roughness of an object will affect its thermal radiation characteristics, leaving traces on the image of the infrared thermal imager. Rough surfaces usually display irregular heat distribution in infrared images, while smoother surfaces show more uniform heat distribution.
By analyzing the heat distribution in infrared images, information about the surface roughness can be obtained. Specific evaluation methods may involve image processing and analysis techniques, such as:
Thermal distribution comparison: Infrared thermal images of objects with different surface roughness are captured and their heat distribution is compared. Typically, rougher surfaces display more thermal spots and thermal gradient changes in the image.
Thermal texture analysis: Texture information in infrared images is analyzed using image processing methods. Rough surfaces may exhibit more texture details. This method can quantitatively evaluate the degree of surface roughness.
Thermal radiation calculation: Based on the object's temperature and thermal radiation characteristics, the thermal radiation distribution is calculated for different surface roughness and compared with the actually measured infrared images.
It should be noted that infrared thermal imagers are mainly used to capture the thermal radiation information on the surface of objects, rather than directly measuring the physical parameters of surface roughness. Therefore, in practical applications, it is often necessary to combine other testing methods, such as optical surface measurement or mechanical measurement, to obtain more accurate surface roughness information.
