Ultrasonic distance detector

Details Ultrasonic distance detector Ultrasonic distance detector

1981-11-13

1984-12-25

Groody, James J.

Communications: electrical

External condition vehicle-mounted indicator or alarm

Transmitter in one vehicle only

367909, G08G 100

Patent

active

044907168

ABSTRACT:
An ultrasonic detector for roadway vehicles comprises an array of electroacoustic transducers mounted on the rear of the vehicle. The transducers are sequentially driven by a transmitter circuit to transmit a pulsed, laterally shifting ultrasonic energy toward an object located behind the vehicle in one of plural regions defined by partially overlapped directivity patterns of adjacent transducers. A receiver circuit is coupled to the transducer array to receive echos returning from the object during the interval between successive beam transmissions. A logic circuit detects the lateral position of and the distance to the object for giving relevant indications on a display unit, the audible tone being variable depending on object distance. An audible warning device is optional.

REFERENCES:
patent: 3778823 (1973-12-01), Sato et al.
patent: 4015232 (1977-03-01), Sindle
patent: 4103278 (1978-07-01), Satake
patent: 4206511 (1980-06-01), Ries et al.
patent: 4207620 (1980-06-01), Morgera
patent: 4238778 (1980-12-01), Ohsumi
patent: 4240152 (1980-12-01), Duncan et al.
patent: 4278962 (1981-07-01), Lin
patent: 4349823 (1982-09-01), Tagami

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