Recognition of present location for vehicle

Abstract

PURPOSE: To always enable the recognizing of the present location of a vehicle accurately, by detecting the most nearby intersection from the present location based on map data each time it travels a fixed distance to recognize this intersection detected as the present location of the vehicle. CONSTITUTION: Based on output data of a travel distance sensor 3, a CPU 7 determines a relationship between the data and map data, namely, the distance l m to the most nearby segment and an angle between the segment and the north of the map. Then, when the distance l m exceeds a preset threshold, hence, detecting that a vehicle makes a curve, a travel distance l c is determined from a point previously indicated as intersection and multiplied by a fixed value to obtain an intersection detecting threshold. Then, distances to intersections from the present location are determined with respect to intersection data stored as map data. When a particular distance is smaller than the intersection detecting threshold while the nearby intersection is detected within a fixed distance range, this intersection detected is withdrawn as new estimated point of the present location. Thus, a distance error due to inaccuracy of the sensor 3 of the like can be corrected as each intersection is detected. COPYRIGHT: (C)1988,JPO&Japio

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (0)

    Publication numberPublication dateAssigneeTitle

NO-Patent Citations (0)

    Title

Cited By (8)

    Publication numberPublication dateAssigneeTitle
    JP-2007223395-ASeptember 06, 2007Mazda Motor Corp, マツダ株式会社Obstruction detection device of vehicle
    JP-2009075036-AApril 09, 2009Kddi Corp, Kddi株式会社Mobile terminal and program for determining turnaround of pedestrian's traveling direction
    JP-2012117974-AJune 21, 2012Ntt Docomo Inc, 株式会社エヌ・ティ・ティ・ドコモ移動端末、システム及び方法
    JP-H02151712-AJune 11, 1990Mazda Motor CorpNavigation apparatus for vehicle
    JP-H02238317-ASeptember 20, 1990Mazda Motor CorpNavigation apparatus for vehicle
    JP-H0277618-UJune 14, 1990
    WO-2012073895-A1June 07, 2012株式会社 エヌ・ティ・ティ・ドコモMobile terminal, system and method
    WO-2015108066-A1July 23, 2015旭化成株式会社Information processing device, map matching device, information processing method, and program