KR200206160Y1 - Location search method of strong composition frame by using navigation system - Google Patents

Abstract

The present invention relates to a strong composite structure position detection device in a vehicle navigation system, wherein a map data read from a storage medium is displayed on a monitor, and a vehicle having a vehicle navigation system capable of identifying the position of the own vehicle through a GPS satellite. In the case, when the GPS signal from the GPS satellite received through the GPS receiver 42 is applied through the filter unit 46 and the first position correction unit 48 for performing a correction in accordance with the position of the vehicle being driven; A plane coordinate system conversion unit 50 which receives the corrected position signal of the vehicle from the first position correction unit 48 and converts the plane signal data into plane coordinate data as an absolute current position of the vehicle; and the plane coordinate system conversion unit 50. When the plane coordinate conversion signal from is applied through the filter unit 52, the vehicle is moved from the second position compensator 54 which corrects the current position of the vehicle which is still running, and the geomagnetic sensor 22 and the vehicle speed sensor 24. Of A space for generating spatial plane coordinate data based on a processor 56 for detecting a current position, a plane coordinate conversion signal from the second position correction 54, and a current position of the vehicle from the processor 56; A coordinate matching unit 58 and a map matching unit 60 for correcting the cumulative error of the vehicle in a timely manner based on the spatial position data of the vehicle applied from the spatial coordinate system converting unit 58 are characterized.

Description

LOCATION SEARCH METHOD OF STRONG COMPOSITION FRAME BY USING NAVIGATION SYSTEM}

The present invention relates to a strong composite structure position detection device in a vehicle navigation system. The present invention relates to a strong composite structure position detection device in a vehicle navigation system capable of detecting.

As is well known, the calculation of the position of the motor vehicle is made by the principle of triangulation based on the position.

In other words, the GPS satellites are equipped with a high-precision clock, and the radio wave launch time signal is transmitted, so the receiver side can know the reception time of the radio wave by the receiver's clock. The 300,000 km / s divided by the distance is the distance between the satellite and the car.

At the same time, the orbital position of each GPS satellite is also transmitted, so the receiving point (car position) can obtain three spheres centered on three satellites as intersections.

However, if there is an error in the clock between the satellite side and the receiver side, the three spheres do not intersect at one point, so the fourth satellite time is calculated by receiving the fourth satellite radio wave and calculating the point where the three spheres intersect at one point. Modify the clock of the receiver on the basis of.

In addition, it is possible to know latitude and longitude altitude by GPS positioning, and to detect the direction of the car by detecting the direction of the geomagnetism through the geomagnetism sensor. To obtain the bearing.

As such, the position of the vehicle is detected based on the position of the host vehicle received from the GPS receiver and the azimuth error, distance error, road width, distance between the test points, and the like detected from various sensors.

1 is a block diagram of a vehicle position discrimination unit having a detachable structure in a vehicle navigation system according to the related art, in which the vehicle position discrimination unit 20 is a vehicle based on a geomagnetism. And a second vehicle position discriminating unit 20a for discriminating the position of the vehicle and a second vehicle position discriminating unit 20b for discriminating the position of the vehicle based on the GPS (Global Positioning System).

Preferably, the first vehicle position discrimination unit 20a includes a geomagnetic sensor 22 comprising a geomagnetic compass for detecting a direction of the geomagnetic and detecting a traveling direction of the vehicle, and a vehicle speed detector 24 for detecting a corresponding vehicle speed. And a first signal processor for detecting a current position of the vehicle by detecting a moving direction of the vehicle and a relative distance from the data pointer in response to the direction detection signal transmitted from the geomagnetic sensor 22 and the vehicle speed detector 24. 24).

In addition, the second vehicle position discrimination unit 20b includes a GPS receiver 28 for receiving radio waves transmitted from four GPS satellites, and a radio wave reception timing of the GPS receiver 28 for detecting an absolute current position of the vehicle. The strength of the radio wave received from the GPS satellite is detected by detecting the strength of the radio wave received by the second signal processor 30 and the GPS receiver 28 for determining the distance between the GPS satellite and the corresponding vehicle. And a GPS signal error detector 32 for generating a measurement error increase signal in the case where the stationary value is exceeded or, for example, when the intensity of the radio wave falls below a predetermined level when the vehicle passes through the tunnel.

In addition, the vehicle position discrimination unit 20 selectively switches the output of the first vehicle position discrimination unit 20a or the second vehicle position discrimination unit 20b to provide the vehicle position discrimination unit 20 through the interface 36 of the navigation processor. The switch unit 34 to be applied to the CPU 38 is also included.

That is, the switch unit 34 outputs from the second signal processing unit 30 of the second vehicle position determining unit 20b using the GPS satellites when the measurement error signal is not detected by the GPS signal error detecting unit 32. On the other hand, when a measurement error signal is detected by the GPS signal error detection unit 32, a position signal output from the first signal processing unit 26 of the first vehicle position discrimination unit 20a using the geomagnetism is selected. Will be selected.

However, according to the vehicle position discrimination unit having the detachable structure, the position signal is determined based on the current position of the vehicle provided by the first vehicle position discriminator or the second vehicle position discriminator. There is a disadvantage that the estimation cannot be made.

The present invention has been made in view of the above circumstances, and in a vehicle navigation system that automatically outputs a position by automatically correcting a vehicle position by mutually correcting a current position of a vehicle detected by a GPS receiver, a geomagnetic sensor, and a vehicle speed sensor. The present invention relates to a strong composite structure position detection apparatus.

In order to achieve the above object, according to a preferred example of the present invention, in a vehicle equipped with a vehicle navigation system that map data read from the storage medium is displayed on the monitor and can determine the position of the own vehicle through the GPS satellites, A first position compensator for correcting a position corresponding to a position of a vehicle being driven when a GPS signal from the GPS satellite received through a GPS receiver is applied through a filter unit, and a position of the vehicle corrected from the first position compensator; The plane coordinate system converting unit converts the plane coordinate data as the absolute current position of the vehicle upon receiving the signal, and when the plane coordinate conversion signal from the plane coordinate system converting unit is applied through the filter unit, the current position of the driving vehicle is continuously corrected. A second position correction unit, a processor for detecting a current position of the vehicle from the geomagnetic sensor and the vehicle speed sensor, and the second position correction unit; On the basis of the spatial coordinate conversion unit for generating spatial plane coordinate data based on the plane coordinate conversion signal from the Chibo government and the current position of the vehicle from the processor, and based on the spatial position data of the vehicle applied from the spatial coordinate system conversion unit. A strong composite structure position detection apparatus in a vehicle navigation system, comprising a map matching unit for correcting a cumulative error of a vehicle in a timely manner.

According to the strong composite structure position detection apparatus in the vehicle navigation system according to the present invention, the radio wave received through the GPS receiver is corrected by the first position correction unit through the filter unit and then applied to the signal processing unit and the plane coordinate system conversion unit. If the plane coordinate data conversion unit generates plane coordinate data corresponding to the current position of the vehicle and applies it to the second position correction unit, the second position correction unit determines the position of the vehicle based on the relative position of the vehicle authorized from the processor. The correction is applied to the plane coordinate system conversion unit and the spatial coordinate system conversion unit.

Here, the spatial coordinate conversion unit generates spatial coordinate data of the vehicle based on the position correction signal and the signal applied from the processor and applies the generated spatial coordinate data to the map matching unit, thereby enabling accurate vehicle position correction.

1 is a block diagram showing a vehicle position discrimination unit of a detachable structure in a vehicle navigation system according to a conventional example;

2 is a block diagram showing a strong composite structure position detection apparatus in a vehicle navigation system according to the present invention.

Explanation of symbols on the main parts of the drawings

20: vehicle position discrimination unit, 20a: first vehicle position discrimination unit,

20b: 2nd vehicle position discrimination unit, 34: switch part,

36: interface, 38: CPU,

40: GPS antenna, 42: GPS receiver,

44: signal processing section, 46, 52: filter section,

48: first position correction, 50: plane coordinate system conversion unit,

54: second position correction, 56: processor,

58: spatial coordinate system conversion unit, 60: map matching unit.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a block diagram showing a strong composite structure position detection device in a vehicle navigation system according to the present invention, the reference numeral 40 in the same figure is installed in a predetermined portion of the front of the vehicle GPS signal transmitted from the GPS satellites are induced Represents a GPS antenna.

Reference numeral 42 denotes a GPS receiver that receives a GPS signal from a GPS satellite that is released from the GPS antenna 40.

Reference numeral 44 denotes a signal processor for determining a GPS satellite and a distance of a corresponding vehicle based on a radio wave reception timing of the GPS receiver 42 to detect an absolute current position of the vehicle, wherein the signal processor 44 ) Is corrected by receiving the position correction signal of the vehicle according to the driving applied from the first position correction unit 48 to be described later.

Reference numeral 46 denotes a filter unit which removes noise from radio waves applied from the GPS receiver 42 and receives and filters the absolute current position signal of the vehicle applied from the signal processor 44.

Reference numeral 48 denotes a first position correction unit which receives the received radio wave filtered by the filter unit 46 and corrects the position of the previous state of the vehicle on the basis of the received radio wave.

Reference numeral 50 denotes a plane coordinate system converting unit which receives the position signal of the vehicle corrected by the first position correction unit 48 and converts it into plan coordinate data as an absolute current position of the vehicle and applies it to the filter unit 52 to be described later. Indicates.

Reference numeral 52 denotes a filter unit for filtering the plane coordinate conversion signal transmitted from the plane coordinate system conversion unit 50.

Reference numeral 54 denotes a second position correction unit for correcting the current position of the vehicle which is continuously driven by receiving the plane coordinate conversion signal filtered through the filter unit 52.

Reference numeral 56 denotes a processor for detecting the current position of the vehicle by detecting the moving direction of the vehicle and the relative distance from the data pointer from the geomagnetic sensor 22 and the vehicle speed sensor 24 shown in FIG.

Reference numeral 58 denotes a spatial coordinate system transformation that generates spatial plane coordinate data based on the coordinate coordinate conversion signal corrected through the second position correction unit 54 and the relative current position of the vehicle applied through the processor 56. Represents wealth.

Reference numeral 60 denotes a map matching unit for timely correcting a cumulative error of the vehicle based on the spatial position data of the vehicle applied from the spatial coordinate system conversion unit 58.

Next, the operation of the strong composite structure position detection device according to the present invention of the above configuration will be described in detail.

First, when a GPS signal transmitted from a GPS satellite is induced through a GPS antenna 40 installed in a predetermined front portion of a vehicle, the signal is received by the GPS receiver 42 and the GPS receiver 42 receives a signal of a corresponding vehicle. The radio wave reception timing is applied to the processor 44.

Subsequently, the signal processor 44 determines the distance between the GPS satellite and the corresponding vehicle based on the received radio wave timing, and receives a position correction signal applied from the first position correction unit 48. Will be processed.

In addition, when the signal received by the GPS receiver 42 is applied to the filter unit 46 to remove noise and then applied to the first position correction unit 48, the position correction signal corresponding to the state of the vehicle being driven. Is applied to the plane coordinate conversion unit 50.

Accordingly, when the plane coordinate conversion unit 50 applies the received position correction signal to the second position correction unit 54 through the filter unit 52, the vehicle running in the second position correction unit 54. The position of the signal is received from the processor 56 and corrected, and the corrected signal is fed back to the plane coordinate conversion unit 50.

In addition, the second position correction unit 54 applies a signal on the plane coordinates of the vehicle applied through the filter unit 52 to the spatial coordinate system conversion unit 58, and the geomagnetic sensor 24 in the processor 56. And the relative position signal of the vehicle applied from the vehicle speed sensor 24 is applied to the spatial coordinate system conversion unit.

Then, the spatial coordinate signal corresponding to the current position of the vehicle is applied to the map matching unit 60 based on the signal received from the spatial coordinate system converting unit 58, and thus the map matching unit 60 is applied to the road of the map. The car's position will be corrected automatically.

As described above, according to the strong composite structure position detection apparatus in the vehicle navigation system according to the present invention, there is an effect that can accurately correct the position of the vehicle by feeding back the position correction signal in response to the position change of the vehicle. .

Claims (1)

In a vehicle equipped with a vehicle navigation system that map data read out from a storage medium is displayed on a monitor and the position of the own vehicle can be determined through a GPS satellite, A first position compensator 48 for performing correction in response to the position of the vehicle being driven when the GPS signal from the GPS satellite received through the GPS receiver 42 is applied through the filter unit 46; A plane coordinate system conversion unit 50 which receives the corrected position signal of the vehicle from the first position correction unit 48 and converts the plane positional data into an absolute current position of the vehicle; A second position correction unit 54 for correcting the current position of the vehicle which is continuously running when the plane coordinate conversion signal from the plane coordinate system conversion unit 50 is applied through the filter unit 52; A processor 56 for detecting the current position of the vehicle from the geomagnetic sensor 22 and the vehicle speed sensor 24; A spatial coordinate system conversion unit 58 for generating spatial plane coordinate data based on the plane coordinate conversion signal from the second position correction unit 54 and the current position of the vehicle from the processor 56; Strong composite structure position detection in a vehicle navigation system, characterized in that it comprises a map matching unit 60 for timely correcting the cumulative error of the vehicle based on the spatial position data of the vehicle applied from the spatial coordinate system conversion unit 58 Device.