Apparatus for measuring the thickness of a workpiece in a liquid temperature compensation means
Abstract
Abstract AN APPARATUS AND METHOD FOR MEASURING THE THICKNESS OF A WORKPIECE USES A LIQUID BODY INTO WHICH A STANDARD AND WORKPIECES TO BE TESTED ARE IMMERSED. A PAIR OF TRANSDUCERS FIXED AT A DISTANCE APART ARE BROUGHT FIRST INTO ACOUSTIC ENERGY TRANSFERRING CONTACT WITH OPPOSITE SIDES OF A STANDARD IMMEDIATELY THEREAFTER WITH A WORKPIECE TO BE TESTED. DURING THE RESPECTIVE ENERGY TRANSFERRING CONTACTS PULSE-ECHO ULTRASONIC ENERGY IS USED TO MEASURE THE LENGTH OF THE LIQUID PATH BETWEEN THE RESPECTIVE TRANS- DUCERS AND THE STANDARD AND THE WORKPIECE. AN ELECTRONIC CIRCUIT COUPLED TO THE TRANSDUCERS PROVIDES A VALUE INDICATIVE OF THE THICKNESS OF THE WORKPIECE, SUCH VALUE BEING INDEPENDENT OF SOUND VELOCITY CHANGES IN THE LIQUID PATH.
Inventors
- 👤 Jerry Berg
- 👤 Lawrence E Bauer Jr
Bibliographic Details
Claims Analysis
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