Generally speaking,X-ray tube assemblyThe radiation exposure in the digital imaging process affects the image quality. The image quality is directly affected by the gray value, and the gray value is directly affected by the exposure. What factors affect the exposure of industrial X-rays?

There are mainly the following elements:

1,X-ray tube assemblyTube Current (mA)

Under the condition that other variables remain unchanged, the greater the tube current, the greater the radiation exposure to the detector.

2, X-ray tube voltage (kV)

Under the condition that other variables are kept constant, the larger the tube voltage, the greater the radiation exposure the detector is subjected to.

3. Power-on (exposure) time of the X-ray tube

Under the condition that other variables remain unchanged, the longer the exposure time, the greater the radiation exposure to the detector.

4, focal length

Because the X-ray will be attenuated with the increase of the focal length, so, under the condition that other variables remain unchanged, the larger the focal length, the more the attenuation, and the smaller the ray exposure to the detector.

5, the density of the penetrating material

Generally speaking,X-ray tube assemblyThe greater the density of the penetrating material (detecting workpiece material), the more the radiation is attenuated in the workpiece, the less the number of photoelectrons that penetrate, and the smaller the radiation exposure the detector receives.

For example, when an X-ray flaw detection equipment for detecting thin-walled aluminum alloy castings is used to detect butt welds of steel cylinders with the same wall thickness (using single-wall transillumination), the exposure amount received by the detector is just enough to meet the aluminum alloy castings. However, for welds with the same wall thickness, the exposure is often insufficient, because the density of iron is higher than that of aluminum.