KR20060106126A - Navigation system and method for correcting position in navigation system and device - Google Patents

Abstract

Disclosed are a navigation system, a method of correcting a position in a navigation system, and an apparatus thereof. The present invention receives a location signal of a vehicle from a satellite, calculates the location information of the vehicle from the speed data and the azimuth data when the intensity of the received signal is below a predetermined level, and calculates the calculated position correction data based on the road data. A position correction device for retrieving POI data and correcting the position information of the vehicle according to whether or not the vehicle is accessible by determining if an error occurs; If the map data and the POI data corresponding to the current location of the vehicle and the location of the target point are retrieved and not stored in the memory, the map data and the POI data are received and stored through a communication network, and the POI data is stored in the location. A vehicle navigation device which transmits to the correction device and combines the position information of the vehicle output from the position correction device with the map data; It is configured to include a display device for displaying the map information displaying the position information of the vehicle coupled by the vehicle navigation device, it is possible to provide a user with a more accurate position even in the state that can not receive GPS data.

GPS, navigation, position, correction

Description

Navigation system and method for correcting position in navigation system and apparatus therefor {NEVIGATION SYSTEM AND METHOD AND APPARATUS FOR COMPLEMETING POSITION AT NEVIGATION SYSTEM}

1 schematically illustrates a system for implementing a navigation system according to an embodiment of the present invention.

2 illustrates a navigation system according to an embodiment of the present invention.

3 is a flowchart illustrating a position correction method according to an embodiment of the present invention.

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

110: satellite

130: navigation system

150: communication network

170: location management server

180: map database

190: POI database

210: speed sensor

220: orientation sensor

300: position correction device

400: vehicle navigation device

500: display device

The present invention relates to a method for calibrating a vehicle, and more particularly, in a navigation system and a navigation system for generating and providing location information based on a vehicle's speed and azimuth data when the satellite cannot receive the location information. It relates to a position correction method and an apparatus thereof.

In general, a navigation system displays a current position of a moving object calculated by using information received from a global positioning system (GPS) on a map displayed on a display screen. In addition, the navigation system displays various information necessary for driving, such as displaying the moving direction of the moving object, the distance to the destination to go to, the current moving speed of the moving object, the route set before the driver, the optimum route to the destination, and the like. To provide. Such a navigation system (or GPS positioning device) is currently mounted on various kinds of moving objects such as ships, aircrafts, automobiles, etc., and is widely used to check the current position and moving speed of moving objects or determine a moving path. In particular, the navigation system calculates latitude, longitude, altitude, etc. using radio signals received from a plurality of satellites belonging to GPS as the current position of the moving object, and then visually displays map information including the current position to the driver. Or audibly.

 In general, when the satellite signal received from the satellite is normally received, the location of the vehicle is detected only by the location information input from the GPS receiver. However, if a satellite signal cannot be detected, for example, while the vehicle passes through a building forest in a city center or inside a tunnel, the satellite signal cannot be detected or the satellite signal becomes very weak. Therefore, since the vehicle's location information cannot be grasped from the satellite signal, there have been frequent cases of providing wrong location information to the user.

In addition, when the strength of the radio wave received from the satellite is weak, even if the location information of the vehicle is grasped, the driving path of the vehicle may be displayed out of the boundary of the road or as if it passes through a building. There has been a problem.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a navigation system and a navigation system for providing more accurate location information even when a vehicle enters an area where GPS data cannot be received such as a building forest or a tunnel section of a large city center. To provide a method and apparatus for correcting the position in the.

The position correction device in the navigation system according to the first aspect of the present invention for achieving the above object,

A GPS receiver for detecting a strength of a signal including location information of the vehicle from the satellite;

Determining whether or not to calculate the position according to the detected signal strength, and compares the calculated position data with the road data to determine whether an error occurs, and if it is determined that the error is detected by searching the point of interest (POI) data A control unit for determining whether to correct and send the correction;

Computing the position data of the vehicle from the signal received from the GPS receiver, receiving the correction request of the controller to retrieve the POI data, and as a result correct the position data of the vehicle according to whether the vehicle can enter Position correction unit for; And

And calculating a position data of the vehicle by calculating distance data and traveling direction data from the speed data and the orientation data of the vehicle according to the position calculation of the controller, and generating and transmitting the position data of the vehicle to the controller.

Navigation system according to a second aspect of the present invention for achieving the above object,

Receives the position signal of the vehicle from the satellite, if the intensity of the received signal is less than the predetermined level, calculate the position information of the vehicle from the speed data and the orientation data, and determine the calculated position correction data based on the road data error A position correction device for retrieving Point Of Interest (POI) data and correcting the position information of the vehicle according to whether the vehicle is accessible;

When the map data and the POI data corresponding to the current location of the vehicle and the location of the target point are searched and not stored in the memory, the map data and the POI data are received and stored through a communication network, and the POI data is stored. A vehicle navigation device which transmits to a position correction device and combines the position information of the vehicle output from the position correction device with the map data; And

And a display device for displaying the map information displaying the location information of the vehicle coupled by the vehicle navigation apparatus.

A position correction method in a navigation system according to a third aspect of the present invention for achieving the above object,

In a vehicle equipped with a navigation system,

A) receiving location information with a GPS receiver, measuring signal strength of a signal received from the GPS receiver;

B) calculating speed data and heading data by obtaining speed data and heading data from a speed sensor and a heading sensor of the vehicle when the strength of the signal is equal to or less than a predetermined level;

C) determining whether the point of interest (POI) data is road information or feature information that can be entered by the vehicle when an error occurs in the progress path as a result of comparing the progress path of the vehicle with road data; ;

D) if the POI data is road information or feature information that can be entered by the vehicle as a result of the determination of step C), combining location data according to the traveling path of the vehicle with map data and displaying it on the navigation screen; Characterized in that it comprises a.

Therefore, according to the present invention, it is possible to provide a user with a more accurate location even in the state of not receiving GPS data.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

1 schematically illustrates a system for implementing a navigation system according to an embodiment of the present invention.

The system of the present invention for implementing the navigation system 130, the satellite database 110, the communication network 150, the location management server 170, and the map database 180 in conjunction with the location management server 170 and And a POI database (Point Of Interest Database; 190).

The location management server 170 stores and manages point of interest (POI) data including location information, map data, and road data, which are located from at least one satellite 110 in a database. The location management server 170 transmits the map data and POI data required by the navigation system 130 through a wired or wireless communication network 150. In addition, the location management server 170 provides the navigation system 130 with information for calculating a route and traffic information based on the map data and the POI data.

In other words, the location management server 170 receives the current location and the destination location of the vehicle from the navigation system 130, calculates an optimal driving route, and includes map data and road data to the navigation system 130. Send POI data together.

The navigation system 130 receives a signal including the position information of the current vehicle from the satellite 110, calculates the position information of the vehicle, and transmits the position information of the vehicle to the location management server 170 through the communication network 150. Send the current location. In addition, the navigation system 130 includes a memory capable of storing map data and POI data, and thus it is possible to store, delete, add, or update map data and POI data that change from time to time.

In addition, when the radio wave received from the satellite 110 is below a predetermined level, the navigation system 130 calculates changing position information of the vehicle based on the speed data and the orientation data of the vehicle.

At this time, the navigation system 130 determines whether or not the position data calculated from the speed data and the azimuth data based on the road data and searches for POI data when it is determined that the error is an error. That is, when the vehicle enters because the POI data is road information such as sea, river or lake, or terrain feature information such as a building, the vehicle travels on the road by correcting the position information of the vehicle. Display.

The communication network 150 transfers necessary information between the navigation system 130 and the location management server 170. The communication network 150 is a mobile communication network implemented as a digital cellular system of the International Mobile Telecommunications 2000 (IMT-2000) or Code Division Mulitiple Access (CDMA).

2 illustrates a navigation system having a position correction device according to an embodiment of the present invention.

The navigation system 130 includes a position correcting apparatus 300, a vehicle navigation apparatus 400, and a display apparatus 500 installed inside the vehicle, and the position correcting apparatus 300 is used to control the vehicle. A speed sensor 210 and a direction sensor 220 for providing speed data and azimuth data are installed together inside the vehicle. An example of the orientation sensor 220 is a gyro sensor.

The position correction apparatus 300 receives the position signal of the vehicle from the satellite 110, and when the intensity of the received position signal is less than or equal to a predetermined level, the velocity data and the orientation data are respectively measured by the speed sensor 210 and the orientation sensor ( Received from the 220 to calculate the location information of the vehicle.

In addition, since the position correction apparatus 300 does not need to perform position correction when the strength of the position signal of the vehicle received from the satellite exceeds the predetermined level, the position correction apparatus 300 is transmitted to the vehicle navigation apparatus 400 to display the display apparatus. The location information of the vehicle is displayed on 500.

The position correction apparatus 300 described above includes a GPS receiver 310, a position corrector 330, a calculator 350, and a controller 370.

The GPS receiver 310 receives current location information of the vehicle from the satellite 110. That is, the location information includes the longitude and latitude information where the vehicle is located, so that the longitude and latitude information of the vehicle can be calculated from the location information to display the location of the vehicle in absolute coordinates.

The controller 370 determines whether to correct the position according to the strength of the signal received from the satellite 110, compares the corrected position data with road data among the POI data, and determines whether the position is corrected according to the result. The correction unit 330 is notified.

That is, the controller 370 measures the intensity of the signal received from the satellite 110 to determine whether the predetermined level is exceeded. When the intensity of the signal exceeds a predetermined level, the signal is normally received and the position correction unit 330 may calculate the position of the vehicle from the position information received from the satellite 110. Therefore, the controller 370 does not transmit a request message for correcting the position of the vehicle to the position corrector 330.

However, when the intensity of the signal is less than or equal to a predetermined level, the controller 370 requests the calculator 350 to generate distance data and travel direction data of the vehicle. The position corrector 330 corrects the position of the vehicle based on the distance data and the heading data generated from the calculator 350, that is, the position correction data.

When the calculation unit 350 receives a request from the position corrector 330, the operation unit 350 receives speed data and azimuth data from the speed sensor 210 and the orientation sensor 220, respectively, to determine whether the vehicle is moved or not. If the direction of travel of the vehicle is calculated. The calculator 350 generates the calculated position correction data and transmits the calculated position correction data to the position corrector 330.

The vehicle navigation apparatus 400 includes a memory or a database (not shown) that stores POI data including map information and road data. The map information is provided to the vehicle navigation apparatus 400 through a storage medium such as a CD, or the map information is obtained from a location management server 170 that manages the map information through a communication network 150 of a wired or mobile communication network. Get updated.

In addition, the vehicle navigation apparatus 400 includes an input unit 410, a communication unit 430, and a coupling unit 450, so that the user may present the input unit 410 to request a route to a target point. Enter the location and target location.

When the target location is input through the input unit 410, the communication unit 430 transmits the current location and the target location of the vehicle to the location management server 170 through the communication network 150, and the current location and the target location. Receive map data and POI data corresponding to a location from the location management server 170.

In addition, the coupling unit 450 combines the position information of the vehicle received from the position correcting apparatus 300 with the map data to transmit the display information to the display apparatus 500.

The operating state of the present invention configured as described above will be described.

3 is a flowchart illustrating a position correction method according to an embodiment of the present invention.

The GPS receiver 310 mounted on the vehicle having the navigation system 130 receives a signal including the position information of the vehicle transmitted from the satellite 110 (S310).

When the strength of the signal received from the satellite 110 exceeds a predetermined level, since a normal signal is received, the position data is extracted from the signal and transmitted to the vehicle navigation apparatus 400, and the vehicle navigation system. The device 400 combines map data and location data of the vehicle to display the location of the current vehicle (S320 and S350). In an application example, the vehicle navigation apparatus 400 may display the current vehicle location by combining map data, POI data, and location data of the vehicle.

However, when the signal strength is less than or equal to a predetermined level in step S320, the speed data and the direction data are received from the speed sensor 210 and the direction sensor 220, and the distance data and the traveling direction data are calculated (S330). .

It is determined whether the distance data and the traveling azimuth data are within a predetermined range, and when the driving distance is within the predetermined range, the driving direction of the vehicle is maintained and the driving path of the vehicle is displayed.

However, when the distance data and the traveling direction data are out of a predetermined range, the traveling path of the vehicle is displayed according to the traveling direction of the vehicle.

When the traveling path is off the road by comparing the traveling path of the vehicle with the road data, it is determined that an error has occurred in the traveling path of the vehicle (S340 and S350).

Therefore, when an error occurs in the traveling path of the vehicle, the POI data is searched to determine whether the vehicle is an area where the vehicle can proceed (S360). For example, as a result of searching the POI data, it is determined whether the vehicle, such as a river, a lake, the sea, or a building, cannot travel.

As a result of the determination in step S360, if the place where the vehicle proceeds is not the place where the vehicle cannot proceed, the position information of the vehicle is corrected regardless of the road data (S380). That is, the driving route of the vehicle is displayed as it is.

However, if the POI data corresponding to the traveling path of the vehicle is a place where the vehicle cannot enter, the determination result of step S360 generates position correction data according to the road data, that is, the vehicle travels on the road. .

The position correction data is transmitted to the vehicle navigation apparatus 400, and the vehicle navigation apparatus 400 displays the current vehicle position by combining the position correction data with map data (S390).

As described in detail above, according to the navigation system and the method for correcting the position in the navigation system and the apparatus thereof, the vehicle equipped with the navigation system does not receive GPS data while passing through a building forest or tunnel section in the city center. Even if the position of the vehicle is primarily corrected and provided to the user by using the speed sensor and the orientation sensor installed in the vehicle, POI (Point Of Interest) data is obtained through the communication network using the vehicle navigation apparatus 400. Therefore, it is possible to provide more accurate position information by determining whether the corrected position information is an error.

Although the present invention has been described in detail with reference to preferred embodiments, the present invention is not limited to the above-described embodiments, and the technical field to which the present invention belongs without departing from the gist of the present invention as claimed in the following claims. Anyone skilled in the art will have the technical idea of the present invention to the extent that various modifications or changes are possible.

Claims (10)

A GPS receiver for detecting a strength of a signal including location information of the vehicle from the satellite; Determining whether or not to calculate the position according to the detected signal strength, and compares the calculated position data with the road data to determine whether an error occurs, and if it is determined that the error is detected by searching the point of interest (POI) data A control unit for determining whether to correct and send the correction; Computing the position data of the vehicle from the signal received from the GPS receiver, receiving the correction request of the controller to retrieve the POI data, and as a result correct the position data of the vehicle according to whether the vehicle can enter Position correction unit for; And And a calculation unit configured to generate distance data and forward direction data from the speed data and the direction data of the vehicle according to the position calculation of the control unit, to generate the position data of the vehicle, and to transmit the position data to the control unit. Position correction device in the system. The method of claim 1, wherein the position correction unit, If the vehicle is impossible to enter as a result of searching the POI data, the position correction data is generated by driving the vehicle on the road according to the road data, and if the vehicle is accessible, the position data is irrelevant to the road data. A position correction apparatus in a navigation system, characterized in that for generating position correction data for the driving route of the vehicle. The apparatus of claim 1 or 2, wherein the speed data is obtained from a speed sensor of the vehicle, and the azimuth data is obtained from a gyro sensor. Receives the position signal of the vehicle from the satellite, if the intensity of the received signal is less than the predetermined level, calculate the position information of the vehicle from the speed data and the orientation data, and determine the calculated position correction data based on the road data error A position correction device for retrieving Point Of Interest (POI) data and correcting the position information of the vehicle according to whether the vehicle is accessible; When the map data and the POI data corresponding to the current location of the vehicle and the location of the target point are searched and not stored in the memory, the map data and the POI data are received and stored through a communication network, and the POI data is stored. A vehicle navigation device which transmits to a position correction device and combines the position information of the vehicle output from the position correction device with the map data; And And a display device for displaying the map information displaying the position information of the vehicle coupled by the vehicle navigation apparatus. According to claim 4, The vehicle navigation device, An input unit for a user to input a current position and a target position of the vehicle; A communication unit for transmitting a current location and a target location input by the user to a location management server, and receiving map data and POI data corresponding to the current location and the target location; And And a coupling unit for coupling the positional information of the vehicle output from the positional correction device with the map data. The vehicle navigation apparatus according to claim 4 or 5, And a storage unit for storing the map data and the POI data received through the communication unit. In a vehicle equipped with a navigation system, A) receiving location information with a GPS receiver, measuring signal strength of a signal received from the GPS receiver; B) calculating speed data and heading data by obtaining speed data and heading data from a speed sensor and a heading sensor of the vehicle when the strength of the signal is equal to or less than a predetermined level; C) determining whether the point of interest (POI) data is road information or feature information that can be entered by the vehicle when an error occurs in the progress path as a result of comparing the progress path of the vehicle with road data; ; D) if the POI data is road information or feature information that can be entered by the vehicle as a result of the determination of step C), combining location data according to the traveling path of the vehicle with map data and displaying it on the navigation screen; Position correction method in a navigation system comprising a. The method of claim 7, wherein the method is E) correcting the position of the vehicle by driving the vehicle on the road according to the road data when it is determined that the POI data is a space where entry of the vehicle is impossible. Position correction method in a navigation system comprising a. The method of claim 7 or 8, wherein the method, F) recognizing that the vehicle traveling direction is maintained when the distance data and the traveling direction data is within a predetermined range. The navigation system of claim 9, wherein the POI data includes road information and feature information, and the POI data is transmitted to the navigation system through a communication network when a target point is input by a user. Position correction method.

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