Acoustic channel for contaminant detection on a surface

Details Acoustic channel for contaminant detection on a surface Acoustic channel for contaminant detection on a surface

1996-05-22

1999-07-13

Oda, Christine K.

Measuring and testing

Vibration

By mechanical waves

7317026, G01N 2922

Patent

active

059229586

ABSTRACT:
A sensor plate is formed as an acoustic channel on which an acoustic transducer is mounted to send ultrasonic waves along a surface of a base wall of the acoustic channel which is exposed to contaminants to be detected. An insert plate encloses the channel to protect the surface opposite the surface exposed to contaminants from the environment. Thus, dirt, moisture, installation adhesives or other materials that might degrade the performance of the sensor are prevented from contacting the backside of the plate carrying the acoustic waves. Such acoustic channel sensors are useful in applications on aircraft surfaces, road surfaces, bridge surfaces and the like for detecting ice.

REFERENCES:
patent: 4404852 (1983-09-01), Goto
patent: 4461178 (1984-07-01), Chamuel
patent: 4604612 (1986-08-01), Watkins
patent: 5456114 (1995-10-01), Lui

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