Source: http://www.google.com/patents/US4999783?dq=U.S.+Patent+No.+4,528,643
Timestamp: 2016-09-26 01:59:34
Document Index: 140380743

Matched Legal Cases: ['art 4', 'art 1', 'art 2', 'art 4', 'art 4', 'art 6', 'art 6', 'art 4']

Patent US4999783 - Location detecting method - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA location detecting method for detecting the location of a vehicle within a predetermined area, comprising the steps of: outputting distance data at every predetermined interval, the distance data being representative of the distance that a vehicle has travelled; outputting heading angle data at every...http://www.google.com/patents/US4999783?utm_source=gb-gplus-sharePatent US4999783 - Location detecting methodAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS4999783 APublication typeGrantApplication numberUS 07/295,206PCT numberPCT/JP1988/000452Publication dateMar 12, 1991Filing dateMay 10, 1988Priority dateMay 11, 1987Fee statusPaidAlso published asDE3853611D1, DE3853611T2, EP0314806A1, EP0314806A4, EP0314806B1, WO1988008961A1Publication number07295206, 295206, PCT/1988/452, PCT/JP/1988/000452, PCT/JP/1988/00452, PCT/JP/88/000452, PCT/JP/88/00452, PCT/JP1988/000452, PCT/JP1988/00452, PCT/JP1988000452, PCT/JP198800452, PCT/JP88/000452, PCT/JP88/00452, PCT/JP88000452, PCT/JP8800452, US 4999783 A, US 4999783A, US-A-4999783, US4999783 A, US4999783AInventorsKenji Tenmoku, Osamu Shimizu, Toshiyuki Shimizu, Kunihiko MitoOriginal AssigneeSumitomo Electric Industries, Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (5), Referenced by (132), Classifications (7), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetLocation detecting method
The aforementioned estimate location computing part 4 is adapted to compute a present location data (Px Py) by computing an east-west direction component dx (=dL�cos(dθ)) and a south-north direction component dy (=dL�sin(dθ)) of the distance dL that a vehicle has travelled, on the basis of the distance data dL outputted from the travel distance detecting part 1 and the heading angle data dθ outputted from the travel heading detecting part 2, and by adding the components dx and dy to a last-known location data (Px', Py'). The estimate location computing part 4 also computes a first limit error E1 that the present location data (Px, Py) may have, by adding an increase in a limit error corresponding to the aforesaid distance data dL to a limit error (including distance errors, heading angle errors and road map errors) that the last-known location data (Px', Py') may have. Also, the estimate location computing part 4 computes a second limit error E2 which is larger than the aforesaid first limit error E1. It is noted that the second limit error E2 may also be a constant error which is larger than a predictable first limit error E1, or an error corresponding to the change in the first limit error E1, or the maximum error of a predictable location. In the case a correlation coefficient larger than a predetermined threshold value was detected in the correlation coefficient evaluating part 6, the aforesaid first limit error E1 is used. On the contrary, in the case a correlation coefficient larger than a predetermined threshold value was not detected in the correlation coefficient evaluating part 6, the aforesaid second limit error E2 is used. Furthermore, the estimate location computing part 4 detects curves (including branches) upon the aforesaid distance data dL and heading angle data dθ, registers locations on the roads, which roads are located within a range of the limit error centering on the aforesaid location data (Px, Py), as estimate locations in an appropriate memory (not shown), and displays all of the estimate locations on an appropriate display unit (not shown).
ri+1,j=A�ri,j+B�drj
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carrying hazardous materials* Cited by examinerClassifications U.S. Classification701/445, 73/178.00R, 701/300, 701/495International ClassificationG01C21/30Cooperative ClassificationG01C21/30European ClassificationG01C21/30Legal EventsDateCodeEventDescriptionDec 22, 1988ASAssignmentOwner name: SUMITOMO ELECTRIC INDUSTRIES, LTD., JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:TENMOKU, KENJI;SHIMIZU, OSAMU;SHIMIZU, TOSHIYUKI;AND OTHERS;REEL/FRAME:005042/0992Effective date: 19881205Aug 29, 1994FPAYFee paymentYear of fee payment: 4Aug 31, 1998FPAYFee paymentYear of fee payment: 8Aug 22, 2002FPAYFee paymentYear of fee payment: 12RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services