Title:
VEHICLE PATH GUIDE APPARATUS
Document Type and Number:
Japanese Patent JPS6366415
Kind Code:
A
Abstract:
PURPOSE:To measure the more correct present position and enable effective path guide to be performed by not correcting an assumed position in a radio wave measuring position wherein errors are increased due to the degradation of a radio wave receiving environment. CONSTITUTION:Hybrid position measuring means 1 is composed of a range sensor, a bearing sensor and a CPU. First, the present vehicle position is determined while correcting an assumed vehicle position obtained by integrating a unit running vector by the means 1 based on a vehicle position measured by a radio wave. Then, path guide is performed by path guide means 2 (CRT and the like) by using the present position measured by the means 1. On the other hand, radio wave intensity detecting means 3 (GPS receiver and the like) detects radio wave intensity in a radio wave measurement and radio wave intensity calculating means 4 (CPU and the like) calculates changes in the radio wave intensity. Correction prohibiting means 5 (CPU, system ROM and the like) prohibits a correction in a radio wave measuring position when the changes in the radio wave intensity are large. Thus, the more correct present position is measured and the effective path guide can be performed.
Inventors:
NAKAYAMA OKIHIKO
ITO TOSHIYUKI
MIZUSHIMA KATSUHIKO
ENDO AKIRA
ITO TOSHIYUKI
MIZUSHIMA KATSUHIKO
ENDO AKIRA
Application Number:
JP21077486A
Publication Date:
March 25, 1988
Filing Date:
September 09, 1986
Export Citation:
Assignee:
NISSAN MOTOR
HITACHI LTD
HITACHI LTD
International Classes:
G01C21/00; G01C21/20; G01S19/49; G08G1/0968; (IPC1-7): G01C21/00; G01C21/20; G01S5/14; G08G1/12
Attorney, Agent or Firm:
Yasuo Miyoshi