Our Categories
Contact Us
Tel: +86-543-3611555
Fax:+86-543-3615999
Email:info@ultrasonicscn.com
skype:longruncn
24 hours service
+86-186-5435-6933
Ultrasonic thickness gauge using common sense
Ultrasonic thickness gauge indication factors:
( 1) rough surface of the workpiece through the large, causing the probe and the contact surface coupling effect is poor, the echo is low, cannot even receives echo signal. For surface rust, coupling effect is poor in service equipment, pipeline through sand, abrasive, and method of surface treatment, reduce the roughness, but can also be oxide and paint layer removed, exposing the metallic luster, so that the probe and was seized by coupling agent can achieve very good coupling effect.
( 2) the workpiece curvature radius is too small, especially in small diameter tube thickness, as used to probe surface is a plane, and the contact point contact or line contact, sound intensity transmittance low ( coupling is not good ). Can choose small diameter special probe (<6mm ), can precisely measure the pipe surface material.
( 3) detection of surface and the bottom surface is not parallel, sonic encountered underside scattering, probe cannot accept what wave signal.
( 4) castings, austenitic steel tissue due to uneven or coarse grains, in which caused serious through ultrasonic scattering attenuation, scattering of ultrasonic along a complex path propagation, make it possible for echo annihilation, causing. Can choose the lower frequency of coarse grain special probe ( 2.5MHz ).
( 5) probe contact surface must wear. Common probe thickness surface of acrylic resin, long-term use can make the surface roughness increases, resulting in a decrease in sensitivity, thereby causing the display incorrect. Can use 500# sandpaper, make it smooth and ensure the parallelism. If it is unstable, consider replacing probe.
( 6) the measured object back a large number of corrosion pit. Due to the object to be measured is the other side has rust, corrosion pit, causing the acoustic attenuation, resulting in irregular change readings, in extreme cases even without reading.
