MEASURING METHOD FOR MINUTE DIAMETER CHANGE AND THICKNESS OF THIN TUBE USING RESONANT FAR-FREQUENCY AND THICKNESS RESONANCE AND DEVICE THEREOF

摘要

PURPOSE: A method and a device are provided to measure a minute change of the diameter of a tube using a resonant far-frequency, not having a delay material in front face of a sensor. CONSTITUTION: The measuring device for the diameter change and the thickness of the thin tube comprises:a driving device unit of a probe having a manipulator contacted a transmitting and a receiving probe and a controller to remote control it; a pulse generating device or synthesizer to generate a supersonic wave pulse in the transmitting probe, and to receive a resonance supersonic wave from the receiving probe; a wave form a digitizer to digit a gathering signal; a computer to measure a resonance spectrum.