Sensor for distance measurement by ultrasound

Details Sensor for distance measurement by ultrasound Sensor for distance measurement by ultrasound

1982-09-22

1984-03-13

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310322, 310327, H01L 4108

Patent

active

044370326

ABSTRACT:
The invention relates to a sensor for performing the distance measuring in accordance with the ultrasound-echo principle, in particular for determining and indicating approaching distances between vehicles and obstacles in close range with an ultrasound transmitter and receiving converter for emitting the ultrasound signals and for receiving the ultrasound signals reflected by the obstacles, whereby the converter consists of an insulated-type transformer with piezo-ceramic resonator disposed thereon, characterized in that dampening material (99) for preventing the energy rich ultrasound emission or reception is provided on the inside of the membrane of the insulator-type transformer on two horizontally opposite disposed circular segments.

REFERENCES:
patent: 2912856 (1959-11-01), Kritz
patent: 3846650 (1974-11-01), Barrow
patent: 3890423 (1975-06-01), Zacharias, Jr.
patent: 4041335 (1977-08-01), Nagata et al.
patent: 4359659 (1982-11-01), Phillips

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