摘要:
The thickness of paint or other non-metallic coating on a galvanized or other plated metal plate is measured by applying radiation to the plated and painted plate and measuring the intensities of fluorescent X-rays thereupon emitted by the plating layer and base plate respectively. The fluorescent X-rays are detected and the electric signal produced by the detector is amplified and shaped to a corresponding waveform. The output of the amplifier is fed to two single channel analyzers and the output signals of the analyzers are counted for a predetermined time period and fed to a computer which computes the thickness from the measured intensities of the emitted fluorescent X-rays.