Ultrasonic thickness measuring method and apparatus

Details Ultrasonic thickness measuring method and apparatus Ultrasonic thickness measuring method and apparatus

1975-06-09

1976-10-12

Gill, James J.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

73 679, G01N 2900, G01N 2904

Patent

active

039850226

ABSTRACT:
The invention refers to an ultrasonic measuring means exhibiting improved stability and calibration adaptability. Ultrasonic energy signals are transmitted into a workpiece and echo responsive signals are received therefrom. A timing signal having a pulse width commensurate with the workpiece thickness is generated. The pulse width is measured by a time interval averaging circuit in combination with a programmable counting means for adjusting the quantity of time interval average measurements required for determining the thickness of the workpiece. The programmable means is adjusted to a value commensurate with the acoustic velocity of the workpiece for causing the output of the apparatus to display the dimension of the workpiece measured.

REFERENCES:
patent: 3354700 (1967-11-01), Schindler
patent: 3427868 (1969-02-01), Charbonnier
patent: 3605504 (1971-09-01), Kummer et al.
patent: 3688565 (1972-09-01), Brech

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