Acoustic sensor and method of using same for determining the pos

Details Acoustic sensor and method of using same for determining the pos Acoustic sensor and method of using same for determining the pos

1983-10-28

1985-11-26

Birmiel, Howard A.

Measuring and testing

Vibration

By mechanical waves

73642, 73644, 318576, 318652, 367127, G01N 2900

Patent

active

045548340

ABSTRACT:
An acoustic sensor and method of using same for determining the position of a tool from a workpiece are disclosed in which a piezoelectric transducer having a curved surface emits a sound wave which strikes the workpiece and is reflected back to the sensor. The sensor and tool are positioned relative to one another so that the workpiece will be near the focal point of the curved surface when the tool is operating. This positioning substantially overcomes the attenuation problems of high frequency sound waves transmitted through air.

REFERENCES:
patent: 2743429 (1956-04-01), Erdman et al.
patent: 4326155 (1982-04-01), Griebeler
patent: 4445380 (1984-05-01), Kaminski
patent: 4459526 (1984-07-01), Griebeler
A paper by Elmer L. Griebeler titled "A Narrow-Beam Prove Using Shock Waves", presented May 12, 1983.

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