Detecting apparatus using ultrasonic waves

Details Detecting apparatus using ultrasonic waves Detecting apparatus using ultrasonic waves

1987-06-18

1989-05-30

Levy, Stewart J.

Communications: electrical

Condition responsive indicating system

With particular coupling link

73632, G08B 108

Patent

active

048355194

ABSTRACT:
A detecting apparatus using ultrasonic waves comprises a sensor unit and a signal processing unit for processing a reception signal sent from the sensor unit to output a detection signal. These units are connected by a cable having three core wires. A power supply signal, an ultrasonic transmission signal and operation indication signal are multiplexed to the first core wire and transmitted from the signal processing unit to the sensor unit. An ultrasonic reception signal and a temperature detection signal are multiplexed to the second core wire and transmitted from the sensor unit to the signal processing unit. The third core wire is used to connect the grounding levels of both units.

REFERENCES:
patent: 4222113 (1980-09-01), Hansen
patent: 4360905 (1982-11-01), Hackett
patent: 4523472 (1985-06-01), Blades
patent: 4581726 (1986-04-01), Makino et al.
patent: 4700569 (1987-10-01), Michalski et al.
Patent Abstracts of Japan, vol. 7 No. 180 (P-215) [1325], 9 Aug. 1983.
Patent Abstracts of Japan, vol. 7, No. 168 (P-212) [1313], 23 Jul. 1983.
European Search Report for Application Number EP 87 10 8674.

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