Ice detection sensor

Details Ice detection sensor Ice detection sensor

1998-03-18

1999-03-23

Dougherty, Elizabeth L.

Measuring and testing

Meteorology

Icing condition

324671, 324688, 324689, 340580, 340962, G01N 200

Patent

active

058862560

ABSTRACT:
An ice detection sensor for placement on a surface of a body subject to ig includes a Pyrex glass or silicon block for disposal on the body surface, the block having a cavity therein, a diaphragm bonded to the silicon block and covering the cavity, a drive electrode disposed in the cavity and operable to deflect the diaphragm upon application of voltage between the drive electrode and the diaphragm, and a second electrode operable to detect motion of the diaphragm. The diaphragm is movable by the drive electrode when there is water covering the diaphragm and when the diaphragm is not covered and the diaphragm is not movable by the drive electrode when there is ice covering the diaphragm. The second electrode is adapted to detect movement and non-movement of the diaphragm, whereby to detect whether ice covers the diaphragm.

REFERENCES:
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patent: 4745803 (1988-05-01), Haavasoja
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patent: 5523959 (1996-06-01), Seegmiller
patent: 5551288 (1996-09-01), Gerardi et al.
patent: 5569850 (1996-10-01), Rauckhorst III
patent: 5811693 (1998-09-01), Okada

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