Communications: electrical – External condition vehicle-mounted indicator or alarm – Transmitter in one vehicle only
Patent
1985-03-12
1987-09-15
Caldwell, Sr., John W.
Communications: electrical
External condition vehicle-mounted indicator or alarm
Transmitter in one vehicle only
340903, 340943, 340 62, 367909, G08G 100, G01S 1300, G01S 1593
Patent
active
046942963
ABSTRACT:
An apparatus capable of sensing sudden approach of a succeeding vehicle and emitting an alarm, while being free from malfunction that may otherwise be caused by the noise from the succeeding vehicle which has approached at a normal speed and stopped in the proximity. The sensing apparatus includes a transmitter disposed in a rear bumper of a vehicle for transmitting ultrasonic waves toward a succeeding vehicle; a receiver disposed in the rear bumper for receiving the ultrasonic waves reflected from the succeeding vehicle; a circuit for detecting the approach speed of the succeeding vehicle from the difference between the frequencies of the reflected waves and the transmitted waves, and generating an alarm signal when the detected approach speed has exceeded a predetermined value; a circuit for detecting the approach distance of the succeeding vehicle at a normal speed from the signal strength of the reflected ultrasonic waves, and interrupting the action of the ultrasonic transmitter and receiver when the detected distance has become shorter than a predetermined value; and an alarm activated in response to the alarm signal and giving a warning of danger to drivers of both the apparatus-installed vehicle and the succeeding one.
REFERENCES:
patent: 3442347 (1969-05-01), Hodgson et al.
patent: 3662328 (1972-05-01), Spivak
patent: 3716822 (1973-02-01), Tsuruta
patent: 3749197 (1973-07-01), Deutsch
patent: 4490716 (1984-12-01), Tsuda
patent: 4491840 (1985-01-01), Nishikawa
patent: 4543577 (1985-09-01), Tachibana et al.
patent: 4549181 (1985-10-01), Tachibana et al.
patent: 4556861 (1985-12-01), Hyodo et al.
Kodera Masao
Kuno Akira
Sasaki Kunihiko
Caldwell Sr. John W.
Cordell Ruffin B.
Nippon Soken Inc.
Nippondenso Co. Ltd.
LandOfFree
Vehicle approach sensing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vehicle approach sensing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vehicle approach sensing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1388553