KR20040098802A - A GPS receiver with a electrical compass to provide a direction for PNS - Google Patents

Abstract

PURPOSE: A GPS receiver having an electronic compass for providing direction information to a personal navigation system is provided to utilize direction information as well as position information by adding an electronic compass function to a GPS reception module. CONSTITUTION: A GPS module(1) and an electronic compass module(2) are connected to a processor(4) through a serial communication bus(3). An input unit(5) for processing a user's input and a display unit(6) for displaying processed data are connected to the processor through a data bus(7). The input unit includes a key pad and a button. The display unit includes an LCD. Position information of the GPS module and direction information of the electronic compass module is transmitter to the processor. The position information and the direction information are processed according to the user's input inputted into the input unit.

Description

A GPS receiver with a electrical compass to provide a direction for PNS}

GPS receiver is a device that finds user's location by using satellite, but it needs to move a certain distance in order to get direction information, and the copper line should have some linearity. The navigation device for a vehicle can be oriented by moving a certain distance because the car moves above a certain speed, but the personal navigation device is not easy to obtain direction information because it moves in a small area. And if you look at the map on your personal navigation system, the map is displayed regardless of your direction, but you can get directions immediately by using the suggested electronic compass.

Therefore, it can be usefully used for a personal navigation device, and the map viewed by the user has an advantage of viewing the map while being rotated in the direction of the user.

The present invention provides a device that can be used by the user more conveniently by providing a direction information in addition to the location information currently provided by adding an electronic compass function to a GPS receiver module connected to a PDA, a notebook computer, and the like independently. .

The electronic compass displays the direction digitally by using the magnetic sensor, and proposes a device that can perform a function that can rotate the map to be displayed in the direction of the current user using this information.

1 is an overall configuration diagram of a device proposed in the present invention.

2 is a configuration diagram of the electronic compass module.

3 is an operation sequence of the proposed device

4 shows the map moving on the display according to the user's orientation.

<Description of the symbols for the main parts of the drawings>

1. GPS receiving module

2. Electronic compass module

3. Serial communication

4. Processor

5. Input device

6. Display device

7. Data bus

8. Magnetic sensor

9. Analog-to-digital converter

10. Processor for Algorithm Calibration

11. Latitude and Longitude Information of GPS

12. Direction information of the electronic compass

13. Map display using direction information

14. Directional sign

15. Map display when viewer (or suggested device) faces north

16. Map display when viewer (or suggested device) heads northwest

17. Rotate Direction Indicator

18. Map

The present invention for achieving the above object is a two-axis magnetic sensor (8) for obtaining a direction component using the earth magnetism, an analog-to-digital converter (9) for its digital processing, an algorithm correction processor for processing this information (10) Electronic compass module (2) consisting of, a GPS receiving module (1) for displaying my location, an input device (5) that accepts user input, a display device (6) for displaying information necessary for the user, and the whole It consists of a processor 4 which collectively processes functions.

1 is an overall configuration diagram including an electronic compass module. GPS module (1) and electronic compass module

(2) is connected to the processor 4 and serial communication (3), the input device 5 for processing the user's input and the display device 6 for showing the processed information to the user is the data bus (7) It is connected to the processor 4 using the operation. The input device 5 refers to a keypad or a simple button, and the display device refers to a liquid crystal screen. The position information calculated at the predetermined time intervals in the GPS module 1 and the real-time direction information calculated in the electronic compass module 2 are transmitted to the processor 4. Information is processed in accordance with a request input from the input device 3, and is processed and output according to the function of the output device. In the case of an application of a vehicle or a personal navigation system using an electronic map, when the user's location is displayed together with the map, the map is rotated in accordance with the direction in which the user is located by using the direction information of the electronic compass (2). It is displayed on the output device for user convenience.

2 is a configuration diagram of the electronic compass module 2. When the magnetic sensor 8 is affected by the earth magnetism and the degree of this effect is output as an analog quantity, it is converted into a digital value by the analog-to-digital converter 9 for digital processing and then transmitted to the processor 10 for algorithm correction. Do post-processing work. In addition to the earth magnetism, the error of the magnetic sensor due to the influence of the surrounding magnetic material (iron, etc.), the temperature, the change of the earth magnetism, the error of the sensor itself, and the like occurs, so that the processor 10 performs post-processing correction.

3 shows the operation sequence and functions. The latitude and longitude 11 of the current position are obtained from the GPS receiver, the direction information 12 is obtained from the electronic compass, and the information is synthesized.

It operates in the order of displaying 13 the map according to the position and direction.

4 illustrates an example in which the map rotates according to a direction. When the viewer faces the north 15, the map is displayed in the same north as the direction indicator 14. When the viewer faces northwest 16, the map is also rotated in the same direction, indicating that the direction indication is rotated 17 in the same direction. Since the map rotates according to the user's direction, the map is displayed with the direction from the current location. Here, the change of direction of the viewer means that the direction of the person does not change, but that the direction of the GPS receiver having the electronic compass rotates.

The present invention combines a GPS receiver with an electronic compass, which has advantages in size and price, to enable direction setting even when stationary, to be conveniently used in a personal navigation device requiring direction information, and to a user's direction (electronic Direction of the GPS receiver equipped with a compass) Therefore, it is possible to display a moving map, thereby providing location information and direction information to the user center. In particular, since the personal navigation device tracks the location while walking, it may be difficult to set the direction. However, the proposed device may improve the accuracy of the location information because the direction is obtained.

Claims (3)

By combining the electronic compass with the GPS receiver, you can process and use location and direction information simultaneously. GPS receiver with electronic compass directional to personal navigation devices GPS having an electronic compass for directing a personal navigation device capable of performing a function of rotating and displaying the electronic map according to the direction in which the GPS receiver is placed even when stopped or walking speed when used as a personal navigation device in claim 1 Receiver Electronic structure that combines miniaturized electronic compass, GPS receiver, and control processor with PCMCIA card or compact flash card for notebook and PDA to give direction to GPS device during stop. GPS receiver with compass