Introduction
Ray detection technology is a method of testing and detecting materials using ray radiation. X-ray technology is the most widely used technique. X-ray is a kind of electromagnetic wave of very short wavelength with higher energies than light. It can penetrate various materials and form images on photographic films with their electrical differences on different planes. This forms a foundation for materials nondestructive testing.
Technology Principle
The principle of ray detection is to irradiate materials with ray and then collect it. This can be used to test and detect internal organization, defects, and thickness of a material by comparing different attenuation coefficients at different energy. It can also detect the type and concentration of a material by comparing different absorption spectra of different elements, which is called ray fluorescence analysis.
Application
Ray detection technology is applied to a variety of fields, such as casting and forging, welding, pipeline, manufacturing, civil engineering and so on. Ray detecting system is mainly composed of ray source, detection device and workpiece. The most common ray source is X-ray generator. It can provide X-ray or radioactive sources. Detection device includes amplifier, analog digital conversion device, computer system, and displayer. The main function of detection device is to collect and process ray data, display ray images and fluorescence analysis images, then output result.
Advantage
Ray detection has many advantages compared to traditional detection methods. Firstly, it can detect the internal organization structure of materials without damaging the surface of materials. Secondly, it can accurately detect the thickness and position of coating on materials. Thirdly, it can detect the type and concentration of contained elements in materials. Forth, it can detect many kinds of defects in materials, such as infiltration of foreign material, blowholing and cavitations. Finally, it has less environmental pollution compared to other detection technologies.
Conclusion
In conclusion, ray detection technology is one of the most advanced technologies for testing and detecting material structures. It can be used for many kinds of materials to test and detect their structure, thickness, defects and contained element, which is beneficial for application of a material and quality control of production.
