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Title:
VEHICLE TAMPERING PROTECTION SYSTEM
Document Type and Number:
WIPO Patent Application WO2003041030
Kind Code:
A3
Abstract:
A method of providing a vehicle monitoring system (10) for ensuring accurate vehicle mileage readings is provided. Microprocessor (20) receives data from a data bus (30) and a satellite communicator (40) regarding the current velocity of the vehicle. After a duration of relatively stable velocity, a velocity difference is calculated between the vehicle speed signal (36) and the satellite speed signal (43). The velocity difference is compared to an allowable tolerance. The vehicle monitoring system may communicate out of tolerance conditions to the vehicle operator through an instrument display (50) and a fleet manager through a fleet office (60).

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Inventors:
GUSTAVSSON TOMMY
BLACKARD MICHAEL
BATE JOHN
KIDD BRIAN
Application Number:
PCT/US2002/035506
Publication Date:
December 18, 2003
Filing Date:
November 05, 2002
Export Citation:
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Assignee:
VOLVO TRUCKS NORTH AMERICA INC (US)
International Classes:
G01C22/02; G07C5/00; G07C5/08; G08G1/052; G08G1/123; (IPC1-7): G06F1/00; G06F7/00; G06F15/00; G01M17/00; G01C17/38; G01P21/00; G01P11/00; G08G1/00; G08G1/07
Foreign References:
US5999890A1999-12-07
US5974356A1999-10-26
US20020124628A12002-09-12
US6266617B12001-07-24
US6265989B12001-07-24
US6011461A2000-01-04
US6243026B12001-06-05
US5485161A1996-01-16
US5828585A1998-10-27
Other References:
See also references of EP 1444669A4
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