Communications: directive radio wave systems and devices (e.g. – Determining velocity
Patent
1996-01-31
1997-12-09
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Determining velocity
342109, 342111, 342 70, G01S 1350, G01S 1360
Patent
active
056965150
ABSTRACT:
A system and method for determining absolute vehicle height and ground speed. As disclosed, a millimeter wave radar system for determining selected boundary distances is implemented based upon a generation of a modulated millimeter wave signal which is envelope detected and thereafter phase detected to determine the selected boundary distance on a continuous real-time basis. To similarly determine absolute vehicle speed on a continuous real-time basis, a method is disclosed for use in cooperation with an on-board microcomputer, the height sensing system described above, and a passive speed sensor aperture which is affixed to the chassis and directed toward the ground at some angle theta. In operation, a portion of the RF signal radiated by the height sensor is backscattered toward the passive speed sensor aperture. The Doppler Shift of this signal caused by vehicle motion is determined. Information derived from the height sensor subsystem is then used to correct errors in vehicle speed computation due to vertical chassis motion and road surface aberrations.
REFERENCES:
patent: 3003783 (1961-10-01), Brueder
patent: 3617993 (1971-11-01), Massie
patent: 4101888 (1978-07-01), Heller et al.
patent: 4148027 (1979-04-01), Nowogrodzki
patent: 4354191 (1982-10-01), Matsumura et al.
patent: 4722547 (1988-02-01), Kishi et al.
patent: 4740045 (1988-04-01), Goodson et al.
patent: 5016017 (1991-05-01), Kodera et al.
patent: 5061932 (1991-10-01), Tribe et al.
patent: 5274380 (1993-12-01), Yatsuka et al.
patent: 5334983 (1994-08-01), Ikeda et al.
patent: 5371718 (1994-12-01), Ikeda et al.
patent: 5532697 (1996-07-01), Hidaka et al.
Richardson, N.A., et al, "True Ground Speed Measurement Techniques", SAE Technical Article # 821058, Society of Automotive Engineers, Inc., 1982, 10 pgs.
Tsuha, W. et al, "Radar True Ground Speed Sensor for Agricultural & Off Road Equipment", SAE Technical Article #821059, Society of Automotive Engineers, Inc., 1982, 9 pgs.
Roddewig Robbin Edwin
Zyren James Gerard
Dixon Richard D.
Ford Motor Company
May Roger L.
Sotomayor John B.
LandOfFree
System and method for determining absolute vehicle height and gr does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for determining absolute vehicle height and gr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for determining absolute vehicle height and gr will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1611117