Ultrasonic measurement of thickness

Details Ultrasonic measurement of thickness Ultrasonic measurement of thickness

1980-01-08

1982-04-13

Ciarlante, Anthony V.

Measuring and testing

Vibration

By mechanical waves

73 1DV, G01N 2900

Patent

active

043241417

ABSTRACT:
An ultrasonic thickness meter provides one or both of two improved operational facilities. The first enables the meter probe to be zeroed at will to allow for the acoustic transit time of the stand-off material of the probe. The second enables the operator at the flick of a switch to display the difference `plus or minus` between the thickness of a workpiece being measured and that of a set standard. The meter includes means to duplicate the acoustic transit time of a zero block or standard block electronically as a first time value signal and to set up a second time-value signal representing the time from excitation of the transmitter crystal to receipt of the first return echo from the far side of the zero block or standard block. These time-value signals are combined under the control of manually operated switches to zero the probe or offset the probe to the set standard.

REFERENCES:
patent: 3624712 (1971-11-01), Weighart
patent: 3918296 (1975-11-01), Kitada
patent: 4182155 (1980-01-01), Fowler

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