X-ray thickness gauge working principle and main features
X-ray thickness gauge principle is based on the intensity of X-ray penetration of the measured object attenuation to convert the measurement of thickness, that is, the measurement of the amount of X-rays absorbed by the measured steel plate, according to the value of the energy of the X-rays, to determine the thickness of the measured piece. By the X-ray detector head will receive the signal converted to electrical signals, amplified by the preamplifier, and then by the special thickness gauge operating system converted to display the actual thickness of the signal to the people to visualise.
The magnitude of the radiation intensity of the X-ray source is related to the emission intensity of the X-ray tube and the intensity of the X-rays absorbed by the measured steel plate. A given thickness within the range of the system can be calibrated using an X-ray detector type M215 in order to determine the required X-ray energy value. When inspecting any particular thickness, the system will set the X-ray energy value so that the inspection can be completed successfully.
For a given thickness, the X-ray energy value is constant. When the safety shutter is opened, X-rays pass through the plate between the X-ray source and the probe. The plate absorbs some of the energy and the remaining X-rays are picked up by the probe located directly above the X-ray source, which converts the X-rays it receives into an output voltage that is related to its size. If you change the thickness of the steel plate under test, the amount of X-rays absorbed will also change, which will make the amount of X-rays received by the probe changes, and the detection signal changes accordingly.
Ray thickness gauge according to the type of ray source can be divided into X-ray thickness gauge and nuclear radiation line thickness gauge two categories, and the latter can be more r ray thickness gauge and ray thickness gauge. According to the role of the ray and the measured plate, can be divided into penetrating and reflective.
Ray thickness gauge is the use of rays and material interaction, for the material absorbed or scattered effect to carry out the measurement of an instrument. Its main features:
(1) can be continuous and non-contact measurement;
(2) Measurement accuracy is high;
(3) Faster response speed;
(4) Can give for wet show, record and control of the electrical signal, easy to achieve production automation.
