The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 1986
Filed:
Nov. 14, 1984
Klaus Volkmann, Bergisch-Gladbach, DE;
Krautkramer-Branson, Inc., Lewistown, PA (US);
Abstract
An ultrasonic thickness gauge circuit includes a dual transducer probe and a logic circuit for providing square wave signals whose duration is equal to the time interval between the ultrasonic signal entering a workpiece to be measured and the reception of the ultrasonic signal reflected at the rear surface of the workpiece. When measuring thin wall thicknesses a measuring error arises due to the 'V'-shaped transit path of the ultrasonic signals being greater than twice the wall thickness of the workpiece. A low-pass filter and a comparator are provided for modifying the square wave signals to effect correction. The modified signal is then used for providing clock pulses, the quantity of which is a measure of the wall thickness of the workpiece.