measuring principle of X-ray thickness gauge
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The principle of X-ray thickness gauge is to convert the thickness measurement according to the intensity attenuation of X-ray penetration of the measured object, that is, to measure the amount of X-ray absorbed by the measured steel plate, and determine the thickness of the measured part according to the energy value of the X-ray. The received signal is converted into electrical signal by X-ray detector, which is amplified by preamplifier, and then converted into actual thickness signal by special thickness measuring instrument operating system.
The radiation intensity of the X-ray source is related to the emission intensity of the X-ray tube and the X-ray intensity absorbed by the measured steel plate. A given thickness within the range of the system is calibrated using a type M215 X-ray detector in order to determine the required X-ray energy value. When detecting any particular thickness, the system will set the limit value of the defined sealing line, so that the detection can be completed successfully.
Under a certain thickness, the energy value of X - ray is constant. When the safety shutter is open, the X-rays pass through the measured steel plate between the X-ray source and the probe. The measured steel plate absorbs some of the energy, and the remaining X-rays are received by a probe located directly above the X-ray source, which converts the received X-rays into an output voltage related to its size. If the thickness of the measured steel plate is changed, the amount of X-ray absorbed will also change, which will make the amount of X-ray received by the probe change, and the detection signal will also change accordingly.
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