JPS62279720A - Map information receiver - Google Patents

Abstract

PURPOSE:To accurately specify a path to an object location by integrating a compass to a mobile body mount or portable receiver receiving a radio signal from a sign post and displaying a map or the like and displaying simultaneously the azimuth. CONSTITUTION:A radio signal modulated by a map information data sent from the sign post is received by a reception antenna 1, demodulated by a reception circuit 2 and stored in a data memory 4 via a data processing section 3. Map information including a map around the sign post is included in the map information data and the azimuth on the map is included at the same time. On the other hand a compass 5 incorproated in the map receiver always detects a definite azimuth. The map receiver displays the azimuth detected by the compass 5 on a display section 7 or displays the map in the map information stored in the memory 4 while rotating it so that the detected azimuth is coincident with the azimuth on the map displayed on the display section 7. Thus, the path to an object location is accurately recognized.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a receiving device for a transmitting/receiving system that wirelessly transmits geographic information to moving objects such as vehicles, pedestrians, etc. .

(Prior art and problems) Conventionally, information boards have been used as a means of obtaining geographic information on streets, etc., but the number of installations is limited, and they are not always easy to find. Moreover, once you leave the information board, you have to rely solely on your memory.

Furthermore, the so-called navigation system of a vehicle has a limited memory capacity, and cannot necessarily store a sufficient range of geographical information.

In order to solve the problems of the conventional methods as described above, there is a system that includes a sign post that transmits geographic information wirelessly and a receiving device that receives the wirelessly transmitted geographic information.

However, in such systems, the relationship between the direction of the map displayed on the receiving device and the actual direction seen from the receiving device is not always clear to the operator, and it is difficult to easily determine the direction to proceed or the place to search. However, the present invention is intended to compensate for such drawbacks.

(Means to solve the problem) One specific example of the map receiving device of the present invention is shown in FIG.

It is composed of a receiving antenna 1, a receiving circuit 2, a data processing section 3, a data memory 4, a compass 5, a control section 6, and a display section 7.

(Function) A radio signal modulated with geographic information data sent from the sign post is received by the receiving antenna l, and then sent to the receiving circuit 2.
The signal is demodulated and stored in the data memory 4 via the data processing section 3. This geographic information data includes geographic information including a map around the sign post, but also the direction on the map.

On the other hand, a compass 5 built into the map receiving device has a function of always detecting a fixed direction (for example, true north).

The map receiving device of the present invention displays the direction detected by the compass 5 on the display section 7 at the same time as the map;
Alternatively, the map in the map information held in the data memory 4 is rotated by an appropriate angle so that the detected direction and the direction on the map displayed on the display section 7 match, and the map is output to the display section 7 and displayed. do.

(Embodiment) FIG. 2 is one of the embodiments of the present invention, and shows a display example of a portable map information receiving device.

Reference numeral 21 is a display unit of the device, and is an image display that processes map data included in the geographical information received from the sign post and displays a graphical representation thereof.

As mentioned above, this map data also includes a direction, and the direction (for example, north) is indicated by, for example, an arrow 24 as shown in the display section 21 of FIG. 2.

On the other hand, the compass built into the map information receiving device detects the direction at all times or only when the operation key 23 is operated to display the map, and the direction indicating section 22 indicates the detected direction (for example, north). is displayed. Therefore, when operating the map information receiving device to search for a destination, use the map shown on the display section 21 and the direction shown on the direction indicating section 22 to find the correct route to the destination. can be known. In addition, the location of the signpost transmitting geographic information is indicated by a spot mark such as 25 on the map, and the range in which geographic information can be received from the signpost is relatively limited, and the map information If the current position of the operator of the receiving device can be determined to be near the spot mark, the route to the destination can be known more clearly by displaying the above-mentioned map and direction.

Note that the map display section 21 and the direction display section 22 do not necessarily need to be separated, and a portion of the map display section 2] may be used.

FIG. 3 shows one of the other embodiments of the invention.

Reference numeral 31 denotes a map display section on which a map obtained by receiving and data processing is displayed. If the direction detected by the compass built into the map information receiving device is, for example, the direction of the arrow in Figure 3 (north), then the direction of the map data of the geographic information received by the map information receiving device and the detected direction When displaying the map on the display unit 31, the map is rotated so that the actual direction matches the direction on the map. This eliminates the need to display the detected orientation, simplifying the circuit and display section, and making it possible to easily understand the orientation relationship between the displayed map and the actual topography without making any mistakes.

(Effects of the Invention) As explained above, by using the present invention, it is possible to easily know the surrounding geography even in an unfamiliar place, and by knowing the direction and orientation, it is possible to easily reach the destination. You can know your course accurately.

[Brief explanation of the drawing]

In Figure 1, a configuration example of a map information receiving device is shown in which 1 is a receiving antenna, 2 is a receiving circuit 3 is a data processing section, and 4 is a data memory 5 is a compass.
6 is a control unit 7 is a display unit. FIG. 3 is an embodiment 21 showing a method of displaying a map and direction of a map information receiving device 20.30. 31 is an image display (display unit) 22 is a direction display unit 23. 33 is an operation key 24. 34 is a mark indicating the direction of the map 25. 35 is a sign post position display mark that sends geographic information Figure 1

Claims (2)

[Claims] (1) A mobile or portable receiving device that receives wireless signals from a signpost that transmits geographic information including a map of the area around the installation location and displays the map, etc. on a display device, with a built-in compass. A map information receiving device characterized by being able to simultaneously display a direction and a direction. (2) A built-in compass detects the direction, processes map data received from a sign post, and displays the map on a display device in a direction that matches the detected direction ( 1) Map information receiving device described in section 1).