Sensor for monitoring the deposition of frozen fog and/or ice on

Details Sensor for monitoring the deposition of frozen fog and/or ice on Sensor for monitoring the deposition of frozen fog and/or ice on

1983-02-15

1985-08-06

Ciarlante, Anthony V.

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

73590, 340582, 62140, G01N 2900

Patent

active

045328064

ABSTRACT:
A sensor for monitoring the deposition of frozen fog and/or ice on evaporator, refrigeration machine or heat pump surfaces, includes a can-shaped housing having opposite sides. A mounting heat conductingly connects the housing to the evaporator. First and second membranes are respectively disposed at the opposite sides of the housing, and first and second electro-acoustic transducers are each attached to a respective one of the membranes. An alternating voltage is applied to the first transducer causing the first transducer to oscillate the first membrane, and the second membrane is spaced from the first membrane by a distance permitting oscillation of the first membrane to oscillate the second membrane.

REFERENCES:
patent: 4176524 (1979-12-01), Kamiyama et al.
patent: 4335613 (1982-06-01), Luukkala

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