Communications – electrical: acoustic wave systems and devices – Echo systems – Speed determination
Patent
1992-09-09
1993-08-24
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Echo systems
Speed determination
G01S 1560
Patent
active
052395162
ABSTRACT:
An ultrasonic ground speedometer utilizing Doppler effect of ultrasonic waves comprises an ultrasonic transmitter for outputting an ultrasonic wave at an emitting angle against a road surface, an ultrasonic receiver for receiving a reflected ultrasonic wave caused by reflection of the output ultrasonic wave from the road surface, a signal processor for deriving a Doppler shift frequency between the frequencies of the output ultrasonic wave from the ultrasonic transmitter and the reflected ultrasonic wave received by the ultrasonic receiver, a first arithmetic circuit for deriving the angle difference between the emitting angle and the reception angle defined between the road surface and the propagation direction of the reflected ultrasonic wave received by the receiver, on the basis of the Doppler shift frequency, and a calculating circuit for calculating a ground speed of the vehicle, on the basis of both the Doppler shift frequency and the angle difference.
REFERENCES:
patent: 4065745 (1977-12-01), Robinson
patent: 5054003 (1991-10-01), Kobayashi et al.
patent: 5097453 (1992-03-01), Kobayashi et al.
Nissan Motor Co,. Ltd.
Pihulic Daniel T.
LandOfFree
Ultrasonic ground speedometer utilizing doppler effect of ultras does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ultrasonic ground speedometer utilizing doppler effect of ultras, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic ground speedometer utilizing doppler effect of ultras will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-834317