05723791 is referenced by 31 patents and cites 51 patents.

A gauge for determining a thickness of a coating on a substrate includes a transducer for emitting ultrasonic signals into the coating and for generating electrical signals proportional to the ultrasonic signals received by the transducer, the received signals include first signals reflected from a transducer/coating interface and second signals reflected from a coating/substrate interface; a pulser for sending pulses to the transducer to trigger the emission of the ultrasonic signals; a sampler for sampling the electrical transducer signals and generating sampled data; a timer for controlling the pulser and the sampler so as to perform an equivalent time sampling of the signals received by the sampler; and a controller for calculating a thickness of the coating based on the sampled data, the controller includes the ability to subject the sampled data to a deconvolution analysis so as to distinguish sampled data corresponding to the first signals from sampled data corresponding to the second signals when the coating is thinner than a wavelength of the ultrasonic signal emitted by the transducer.

Title
High resolution ultrasonic coating thickness gauge
Application Number
8/127529
Publication Number
5723791
Application Date
September 28, 1993
Publication Date
March 3, 1998
Inventor
David J Beamish
Brockville
CA
Leon C Vandervalk
Prescott
CA
Frank J Koch
Ogdensburg
NY, US
Agent
Burns Doane Swecker & Mathis
Assignee
DeFelsko Corporation
NY, US
IPC
G01N 29/18
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