Ultrasonic thickness gauge value does not display the reason analysis
Ultrasonic thickness gauge in the actual application, especially in the service equipment monitoring, if there is a value distortion, deviation from the actual thickness of the phenomenon, the result caused by the pipeline (equipment) hidden danger exists, is based on the wrong data to replace the pipe fittings, resulting in a large amount of material waste. Mattel for you to analyse no display value display or display value flashing unstable reasons:
(1) the surface roughness of the workpiece is too large, resulting in poor coupling between the probe and the contact surface, the reflection of the echo is low, or even can not receive the echo signal. In-service equipment, most of the pipeline is surface corrosion, coupling effect is very poor.
(2) The radius of curvature of the workpiece is too small, especially when measuring the thickness of small-diameter pipe, because the surface of the commonly used probe for the plane, and the curved surface contact for the point contact or line contact, the sound intensity of the transmission rate is low (coupling is not good).
(3) Detection surface and the bottom surface is not parallel, the acoustic wave encountered in the bottom surface scattering, the probe can not accept the bottom wave signal.
(4) Castings, austenitic steel due to uneven organisation or coarse grain, ultrasonic waves in which the passage of serious scattering attenuation, the scattered ultrasonic waves along the complex path propagation, it is possible to make the echo annihilation, resulting in non-display.
(5) The probe contact surface has some wear and tear. Commonly used thickness probe surface for acrylic resin, long-term use will make its surface roughness lofty, resulting in a decrease in sensitivity, resulting in non-display or flicker.
(6) There are a lot of corrosion pits on the back side of the measured object. As the other side of the measured object has rust spots, corrosion pits, resulting in acoustic attenuation, leading to irregular changes in the readings, and in extreme cases, even no readings Ultrasonic thickness gauge
