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1. EP0870175 - A ZERO MOTION DETECTION SYSTEM FOR IMPROVED VEHICLE NAVIGATION SYSTEM

Office
European Patent Office
Application Number 96945965
Application Date 27.12.1996
Publication Number 0870175
Publication Date 14.10.1998
Publication Kind B1
IPC
G01C 21/00
GPHYSICS
01MEASURING; TESTING
CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
21Navigation; Navigational instruments not provided for in groups G01C1/-G01C19/104
G01C 21/26
GPHYSICS
01MEASURING; TESTING
CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
21Navigation; Navigational instruments not provided for in groups G01C1/-G01C19/104
26specially adapted for navigation in a road network
G01S 19/49
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
19Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
38Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
39the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS , GLONASS or GALILEO
42Determining position
48by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system
49whereby the further system is an inertial position system, e.g. loosely-coupled
G08G 1/0969
GPHYSICS
08SIGNALLING
GTRAFFIC CONTROL SYSTEMS
1Traffic control systems for road vehicles
09Arrangements for giving variable traffic instructions
0962having an indicator mounted inside the vehicle, e.g. giving voice messages
0968Systems involving transmission of navigation instructions to the vehicle
0969having a display in the form of a map
CPC
G01C 25/005
GPHYSICS
01MEASURING; TESTING
CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
25Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
005initial alignment, calibration or starting-up of inertial devices
G01C 21/28
GPHYSICS
01MEASURING; TESTING
CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
21Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
26specially adapted for navigation in a road network
28with correlation of data from several navigational instruments
G01P 13/00
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
13Indicating or recording presence, absence, or direction, of movement
G01P 21/00
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
21Testing or calibrating of apparatus or devices covered by the preceding groups
G01P 21/02
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
21Testing or calibrating of apparatus or devices covered by the preceding groups
02of speedometers
Applicants MAGELLAN DIS INC
Inventors CROYLE STEVEN R
SPENCER LARRY E II
Designated States
Priority Data 08579903 28.12.1995 US
9620854 27.12.1996 US
Title
(DE) NULLBEWEGUNGSDETEKTIONSSYSTEM FÜR VERBESSERTES FAHRZEUGNAVIGATIONSSYSTEM
(EN) A ZERO MOTION DETECTION SYSTEM FOR IMPROVED VEHICLE NAVIGATION SYSTEM
(FR) DETECTION DE MOUVEMENT NUL POUR SYSTEME DE NAVIGATION AMELIORE DE VEHICULE
Abstract
(EN)
The improved vehicle navigation system can take advantage of the recent availability of low cost micro-machined and piezoelectric sensors, and partially overcomes the low dynamics and line of sight limitations of GPS receivers without resorting to the hard wired approach described above. The low cost sensors introduce system level errors due to their inherent DC offset and drift rates. The improved vehicle navigation system minimizes both the sensor induced errors and GPS low dynamic limitations by using a zero motion detection system as a self contained (within the navigation system), vehicle independent device.

(FR)
L'invention concerne un système de navigation amélioré pour véhicule dans lequel on peut tirer partie des capteurs micro-usinés et piézoélectriques à faible coût récemment mis au point et surmonter en partie les limites restraintes des récepteurs du système mondial de radiorepérage (GPS) en matière de fonctionnement dynamique et de visibilité directe, sans recourir au câblage dont il est question dans la description. Les capteurs à faible coût susmentionnés introduisent des erreurs au niveau du système à cause des caractéristiques intrinsèques suivantes: décalage de courant contenu et taux de dérives. Le système de navigation amélioré pour véhicule offre la possibilité de réduire au minimum les erreurs induites par des capteurs et les limites restraintes en matière de dynamique, grâce à l'utilisation d'un dispositif indépendant du véhicule, complet en lui-même (intégré au système de navigation), pour la détection de mouvement nul.