Device for detecting the presence of frost and/or for measuring

Details Device for detecting the presence of frost and/or for measuring Device for detecting the presence of frost and/or for measuring

1987-10-14

1989-05-23

Kyle, Deborah L.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367902, 367908, 244134F, 73617, H04R 1700

Patent

active

048336602

ABSTRACT:
In a detection device of the presence of frost and/or measuring the thickness of the frost by ultrasound, a probe with a piezoelectric ultrasonic transducer generates an ultra-sonic acoustic emission wave and detects ultrasonic acoustic echo waves reflected by the frost. An actuating device for the probe is arranged to provide to the transducer electrical energizing signals. The probe comprises: a frost detector placed in front of the transducer and constituted of a material having an acoustic impedance between 30.times.10.sup.5 and 44.times.10.sup.5 kg m.sup.-2 s.sup.-1. This detector has a surface designed to be exposed to the surrounding atmosphere to be covered with frost. An acoustic delay device is adapted to ensure acoustic coupling and adaptation between the transducer and the detector and to separate in time the ultrasonic emission add reflected waves. A body of heat insulating material covers the assembly of the detector, the transducer and the acoustic delay device.

REFERENCES:
patent: 2966656 (1960-12-01), Bigbie et al.
patent: 3200369 (1965-08-01), Neubauer et al.
patent: 3690154 (1972-09-01), Wells et al.
patent: 3918296 (1975-11-01), Kitada
patent: 3921442 (1975-11-01), Soloway
patent: 4205686 (1980-06-01), Harris et al.
patent: 4428206 (1984-01-01), Massa
patent: 4437332 (1984-03-01), Pittaro
patent: 4532806 (1985-08-01), Bruchmuller
patent: 4553137 (1985-11-01), Marxer et al.
patent: 4604612 (1986-08-01), Watkins et al.

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