Monitor unit for sensors, particularly ultrasonic sensors, for m

Details Monitor unit for sensors, particularly ultrasonic sensors, for m Monitor unit for sensors, particularly ultrasonic sensors, for m

1988-10-19

1990-12-25

Williams, Hezron E.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367909, 367 13, 340904, 73 1DV, G01S 1593

Patent

active

049808699

ABSTRACT:
A motor vehicle backup monitor introduces a reflector into the detection range of a sensor in predetermined manner during a test phase. The reflector can comprise, for example, the flap of the housing which encloses the sensor. The reflector is removed from the detection range of the sensor during its operational phase. The monitor unit is particularly applicable to ultrasonic sensors used to monitor a motor vehicle when it is backing up.

REFERENCES:
patent: 3394589 (1968-07-01), Tomioka
patent: 3491334 (1970-01-01), Martin
patent: 3749197 (1973-07-01), Deutsch
patent: 4210969 (1980-07-01), Massa
patent: 4292679 (1981-09-01), Kondo et al.
patent: 4500977 (1985-02-01), Gelhard
patent: 4561064 (1985-12-01), Bruggen et al.
patent: 4578997 (1986-04-01), Soltz
patent: 4745808 (1988-05-01), Hagen
patent: 4803670 (1989-02-01), Chen
Patent Abstracts of Japan, Band 8, No. 219 Oct. 5, 1984, JP A 59-102173.

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