Ground speed sensor

Details Ground speed sensor Ground speed sensor

1987-02-02

1987-12-15

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Determining velocity

G01J 944

Patent

active

047136650

ABSTRACT:
An ultrasonic ground speed sensor has a vehicle-mounted transmitter and a receiver for receiving signals reflected from the transmitter to the receiver by terrain over which the vehicle travels. An attenuated and phase-shifted transmit frequency is superimposed upon an output of the receiver to cancel cross talk, thus providing a substantially pure reflected frequency. A phase-locked loop converts the reflected frequency to a voltage which represents the direction and speed of the vehicle.

REFERENCES:
patent: 3021521 (1962-02-01), Hutchins
patent: 3094693 (1963-06-01), Taylor
patent: 3099832 (1963-07-01), Frelich
patent: 3719923 (1973-03-01), Waterman
patent: 3795893 (1974-03-01), Kritz et al.
patent: 3863198 (1975-01-01), Lerner
patent: 3893076 (1975-07-01), Clifford
patent: 3895384 (1975-07-01), Fathauer et al.
patent: 3896788 (1975-07-01), Sato
patent: 4020490 (1977-04-01), Millard
patent: 4052722 (1977-10-01), Millard
patent: 4079377 (1978-03-01), Zur Heider et al.
patent: 4172256 (1979-10-01), Pacozzi
patent: 4186397 (1980-01-01), Sternberger et al.
patent: 4225950 (1980-09-01), Kotera et al.
patent: 4231039 (1980-10-01), Fritzler et al.
patent: 4276548 (1981-06-01), Lutz
patent: 4354191 (1982-10-01), Matsumura et al.
patent: 4359734 (1982-11-01), Bachman
Egawa, "A Microwave Doppler Radar Velocity Meter for Construction Machinery", SAE Paper No. 821083.
Gorfs and Benson, "Maximizing Dozer Work Rate with Draft Power Sensing Systems, SAE Paper No. 790510.
Tsuha et al., "Radar True Ground Speed Sensor for Agricultural and Off-Road Equipment", SAE Paper No. 821059.
"Digital Frequency Tracker", pp. 13-17, Analog Phase Locked Loop, W. D. Stanley, Oct. 1971.
"Theory of LDV Tracking Systems", T. S. Darrani, Jul. 1974.

Affiliated with

Also associated with

Rating

Ground speed sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ground speed sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ground speed sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1223045