Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1983-07-22
1986-08-05
Rowland, James L.
Communications: electrical
Condition responsive indicating system
Specific condition
73599, 367157, 367168, 367908, G08B 1902, G01H 312, H04R 1500, H04R 1700
Patent
active
046046127
ABSTRACT:
An ice detector to detect a lyaer of ice on a thin solid sheet 14, such as the skin of an aircraft wing, even in the presence of water, comprises two ultrasonic transducers attached to the sheet. The first transducer 10 is adapted to cause propagation of ultrasonic waves through the sheet 14 having their predominant component parallel to the surface of the sheet 14. Such waves will dissipate energy into an ice layer adhering to the surface, but not into air or a liquid layer. The second transducer 30 is adapted to detect the waves propagating in the sheet and to give a signal representative of their amplitude. A discriminator 34 responsive to the signal detects the presence of an ice layer on the surface.
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Deighton Michael O.
Gillespie Arthur B.
Pike Roger B.
Scott-Kestin Colin B.
Watkins Roger D.
Hinds William R.
Mullen Jr. Thomas J.
Rowland James L.
United Kingdom Atomic Energy Authority
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