Navigation apparatus for moving object

• US 5,084,822 A
• Filed: 12/14/1988
• Issued: 01/28/1992
• Est. Priority Date: 12/15/1987
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Hayami, Katsuro
• Primary Examiner(s): Lall, Parshotam S.
• Assistant Examiner(s): Trans, V. N.
• Application Number:
  US07/284,369
• Time in Patent Office: 1,140 Days
• Field of Search: 364/449, 364/444, 364/443, 364/521, 364/424.01, 340/990, 340/995, 342/450, 342/451, 342/452, 342/458, 342/461, 73/178 R
• US Class Current: 701/212
• CPC Class Codes: G01C 21/367 Details, e.g. road map scale, orientation, zooming, illumination, level of detail, scrolling of road map or positioning of current position marker
• CPC Class Codes: G01C 21/3673 Labelling using text of road map data items, e.g. road names, POI names

Abstract

A navigation apparatus in which the scale of a displayed map is automatically adjusted in dependence on parameter such as the distance between the moving object and a preselected destination.

Claims

1. A navigation apparatus for a moving object, comprising:

a position detecting unit for detecting a present position of said moving object by receiving a signal relating to a distance over which said moving object has traveled and to an azimuth angle of a moving direction;

a map data memory unit, including a plurality of memory units, for storing predetermined map data;

a key input unit for inputting predetermined input data;

a data processing unit, responsive to said position detecting unit, said map memory data unit, and said key input unit, for obtaining predetermined output data indicative of a velocity of said moving object by processing said received signal, map data, and input data, said data processing unit including a memory selecting unit for selecting at least one of said plurality of memory units at least partially on the basis of said velocity; and

a display unit, responsive to said data processing unit, for displaying a map relating to a present position of the moving object and a destination to which the moving object is directed, said map being displayed with an optimum scale by changing the scale of the map displayed on the display unit in accordance with said velocity as indicated by said output data.

2. A navigation apparatus for a moving object, comprising:

a position detecting unit for detecting a present position of said moving object by receiving a signal relating to a distance over which said moving object has traveled and to an azimuth angle of a moving direction;

a steering angle sensor connected to said position detecting unit for detecting variations in steering angle;

a map data memory unit, including a plurality of memory units, for storing predetermined map data;

a key input unit for inputting predetermined input data;

a data processing unit, responsive to said position detecting unit, said map memory data unit, and said key input unit, for obtaining predetermined output data indicative of a moving condition including a velocity and steering angle of said moving object by processing said received signal, map data, and input data, said data processing unit including a memory selecting unit for selecting at least one of said plurality of memory units at least partially on the basis of said steering angle; and

a display unit, responsive to said data processing unit, for displaying a map relating to a present position of the moving object and a destination to which the moving object is directed, said map being displayed with an optimum scale by changing the scale of the map displayed on the display unit in accordance with said steering angle as indicated by said output data.