Microwave ice accretion meter

Details Microwave ice accretion meter Microwave ice accretion meter

1982-01-05

1984-09-04

Krass, Errol A.

Boots, shoes, and leggings

244134D, 324 585R, 340580, G01B 1304

Patent

active

044701233

ABSTRACT:
A system for indicating ice thickness and rate of ice thickness growth on surfaces is disclosed. The region to be monitored for ice accretion is provided with a resonant surface waveguide which is mounted flush, below the surface being monitored. A controlled oscillator provides microwave energy via a feed point at a controllable frequency. A detector is coupled to the surface waveguide and is responsive to electrical energy. A measuring device indicates the frequency deviation of the controlled oscillator from a quiescent frequency. A control means is provided to control the frequency of oscillation of the controlled oscillator. In a first, open-loop embodiment, the control means is a shaft operated by an operator. In a second, closed-loop embodiment, the control means is a processor which effects automatic control.

REFERENCES:
patent: 2800647 (1957-07-01), Baerwald et al.
patent: 3240054 (1966-03-01), Roth
patent: 3270330 (1966-08-01), Weinberg
patent: 3836846 (1974-09-01), Overall et al.
patent: 3940622 (1976-02-01), Stallabrass et al.
patent: 4054255 (1977-10-01), Magenheim
patent: 4060212 (1977-11-01), Magenheim
patent: 4095456 (1978-06-01), Edgington
patent: 4176524 (1979-12-01), Kamiyama et al.
patent: 4365131 (1982-12-01), Hansman, Jr.

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