KR20010027754A - Navigation voice system and method based on the precise coordinate interpretation of gps receiver - Google Patents

Abstract

PURPOSE: A navigation voice system by a precision coordinate analysis of a GPS(Global Positioning System) receiving signal is provided to reduce an error between location data of a moving object transmitting from a GPS satellite and a real location of a moving object receiving a GPS signal, so as to transmit a current location as a voice through the precision coordinate analysis. CONSTITUTION: A receiver(12) receives international longitude and latitude coordinate data from a GPS(Global Positioning System) satellite. A topography data storage(20) turns important topography planimetric features to a numerical value, and stores the numerical value. An input unit(22) receives conversion modes from a user. An operator(CPU)(24) converts the international longitude and latitude coordinate data into Bessel longitude and latitude coordinate data each conversion mode. The operator(CPU)(24) converts the Bessel longitude and latitude coordinate data into plane orthogonal coordinate data. The operator(CPU)(24) calls a region section of the converted plane orthogonal coordinate data from the topography data storage(20). The operator(CPU)(24) extracts the important topography planimetric features mostly adjacent to the plane orthogonal coordinate data among the important topography planimetric features of the called region section. The operator(CPU)(24) processes important topography planimetric features information necessary for the user. An output unit(26) outputs an operated result from the operator(24) as a voice.

Description

Voice guidance system and method through precise coordinate analysis of GPS signal {NAVIGATION VOICE SYSTEM AND METHOD BASED ON THE PRECISE COORDINATE INTERPRETATION OF GPS RECEIVER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation voice system and a voice guidance method using a GPS positioning signal. More particularly, the present invention relates to a position information of a moving object transmitted from a GPS satellite and a moving object receiving a GPS signal. The precision of the GPS signal that can guide the current position more simply and precisely by reducing the error by performing the precise conversion by the precise position conversion method without the help of a separate position correction device. The present invention relates to a voice guidance system and a voice guidance method through coordinate analysis.

In general, the GPS system measures the arrival time of the radio wave emitted from the satellite, calculates the distance from the satellite, obtains the current position from the satellite, and transmits the related information to the user by using a CRT screen or voice. And an output device.

The carrier signal received from the GPS satellites contains location information and time information, which is used for military purposes, according to the frequency band, and used for P codes with a measurement accuracy of less than 15m, and for general use, and C / A with a measurement accuracy of about 100m. I have the code.

However, the C / A code used by the general public has a significant difference from the actual position as described above, and thus requires more precise location guidance, for example, a voice for the blind to safely reach the destination. In the voice-assisted location guidance system for guiding road information and surrounding features to the blind, it cannot be used as it is.

Accordingly, error correction methods introduced into the conventional position guidance system using GPS include dead rechoning, map matching, and the like.

Dead rechoning is a method of measuring a driving distance by mounting a wheel rotation sensor on a vehicle, obtaining a traveling direction by an inertial induction device such as a gyro, and inferring the current position of the vehicle and displaying it on a map.

Under the basic assumption that the location of the vehicle should be represented on the road, the map matching method expresses the current location of the vehicle on the road by comparing the coordinates of intersections or major points on the road when the current location is out of a certain range. Way.

However, since the dead reckoning or map matching method converts the position data received from the GPS into the Cartesian coordinates on the map as it is, the error is not corrected properly. Accordingly, if there is a similar terrain, there is a high possibility that the current position is incorrect.

In order to prevent this, an external device is additionally provided, but the gyro, which is mainly used as an external device, is an expensive device, and thus has been a problem for the general public.

In addition, when a user needs to carry a receiving device, such as a voice assisted location guide system for the blind, portable devices become inconvenient as more external devices are added.

Accordingly, the present invention is to solve the above problems, an object of the present invention is to provide a voice guidance system and method for delivering a voice to the user by configuring and analyzing the position data of the moving object received from the GPS in a more precise and simple configuration To provide.

1 is a block diagram of a voice guidance system according to the present invention

2 is a flow chart of the voice guidance method according to the present invention

<Description of the code | symbol about the principal part of drawing>

12: receiver 14: GPS satellites

16: reception antenna 18: signal converter

20: terrain data storage unit 22: input unit

24: calculation unit 26: output unit

28: voice modulator 30: voice amplifier

32: Speaker

Voice guidance system using the precise coordinate analysis of the GPS signal according to one feature of the present invention for achieving the above object,

Receiving unit for receiving international latitude and longitude coordinate data from GPS satellites, Terrain data storage unit for dividing the topographic maps produced by aerial photos by region and storing only the important features, and Data and terrain data received from the receiver In the GPS voice guidance system comprising a calculation unit for comparing and calculating the data stored in the storage unit, and an output unit for outputting the result calculated by the operation unit in voice,

A first coordinate conversion step of converting the international longitude coordinate data into Bessel longitude coordinate data for each of the conversion modes input by the input unit; A second coordinate conversion step of converting the Bessel longitude coordinate data converted in the first coordinate conversion step into planar rectangular coordinate data; An area section calling step of calling an area section to which the planar coordinate data converted in the second coordinate conversion step belongs from a terrain data storage unit; An extraction step of extracting an important feature closest to the plane rectangular coordinate data from the important feature data stored in the area code called in the area code call step; An information processing step of processing the important feature information required by the user from the important feature extracted in the extraction step is characterized in that for performing.

On the other hand, the voice guidance method through the precise coordinate analysis of the GPS signal according to another feature of the present invention,

An eleventh step of receiving current position data of a moving object from a GPS satellite through a receiving unit; A twelfth step of converting the current position data received in the eleventh step into international longitude coordinate data; A thirteenth step of receiving a coordinate data conversion mode from a user through an input unit; A fourteenth step of converting the international longitude and latitude coordinate data converted in the twelfth step into Bessel longitude and latitude coordinate data for each conversion mode received in the thirteenth step; A fifteenth step of converting the Bessel longitude coordinate data converted in the fourteenth step into planar rectangular coordinate data; A sixteenth step of calling an area section to which the planar coordinate data converted in the fifteenth step belongs from the terrain data storage unit; A seventeenth step of extracting an important feature closest to the plane rectangular coordinate data from the important feature data stored in the region section called in step 16; An eighteenth step of calculating related information on the important feature required by the user from the important feature extracted in step 17; The nineteenth step of outputting the important feature information calculated in the eighteenth step by voice.

In this case, the method for outputting by voice in the nineteenth step may include: twenty step of modulating the important feature data into voice data; A twenty-first step of amplifying the voice data modulated in the twentieth step into an audible frequency domain; The twenty-second step of outputting the voice data amplified in step 21 through a speaker.

Hereinafter, with reference to the accompanying drawings an embodiment of the present invention that can specifically realize the above object will be described.

1 is a view showing the configuration of the voice support guide system according to the present invention, wherein the receiver 12 digitalizes the received antenna 16 and the received carrier to receive the carrier wave transmitted from the GPS satellites 14 and the international longitude coordinates. It consists of a signal converter 18 for extracting data.

The terrain data storage unit 20 is a device for storing the necessary geographic information based on the topographical map of scale 1/25000 made on the basis of aerial photographs and digitizing and storing them on a CD-ROM. And construct a terrain section by dividing it by a certain distance for each latitude, and designate important features by node number in the terrain section, and record not only its location but also various properties of the features such as name, type, floor number, paint color, etc. .

In addition, the input unit 22 includes four modes, such as MRE conversion mode, S-M conversion mode, M-B conversion mode, and B-W conversion mode, so that the user can select an appropriate conversion mode according to the region.

In accordance with the coordinate conversion mode input by the input unit 22, the calculation unit 24 compares and calculates the international longitude coordinate data received from the receiving unit 12 with the important feature data for each node stored in the terrain data storage unit 20. Extract the important feature data closest to the current location.

The important feature data extracted above is modulated into voice through the output unit 26 so that the user can recognize it as voice.

The output unit 26 includes a voice modulator 28 that modulates the important feature data into a voice, and a voice amplifier that amplifies the sound wave modulated by the voice modulator 28 into an audible frequency region so that a user can listen to the voice. 30, and a speaker device 32 for transmitting the sound waves amplified by the voice amplifier 30 to the user.

The voice modulator 28 may use a general voice generator or the like, and may also use a method of recording the data in advance in the terrain data storage unit 20 and then calling the voice data.

On the other hand, the voice support guide method using the voice support guide system configured as described above with reference to the bar shown in Figure 2 as follows.

First, current position data is received from the reception antenna 16 (S1), and the current position data is converted into international longitude coordinate data by the signal converter 18 (S2).

The data of the international longitude and latitude coordinates are obtained according to the principle of triangulation by the GPS positioning method, and the same standard is used in all regions of the earth. The latitude (Ψw), longitude (λw), and altitude (Hw) of the WGS-84 elliptic coordinate system are the same standards. It consists of data.

However, since the international longitude coordinate data of the WGS-84 elliptic coordinate system is an elliptic coordinate, the coordinate transformation should be performed on the rectangular coordinate to contrast with the planar rectangular coordinate on the map.

At this time, in the present invention, after receiving the conversion mode from the user through the input unit 22 without directly converting the WGS-84 elliptic coordinates into Cartesian coordinates (S3), it is converted back to Bessel (LESSEL) longitude coordinates for each conversion mode The step is further performed (S4).

The conversion mode for converting the WGS-84 elliptic coordinate to the Bessel elliptic coordinate is all four conversion modes, which are composed of an MRE conversion mode, an S-M conversion mode, an M-B conversion mode, and a B-W conversion mode.

The MRE transformation mode is a coordinate transformation method using a multiple regression equation. The MRE transformation mode returns a variable value of a latitude, longitude, and altitude (ΔΨ, Δλ, ΔH) by returning a variable amount of a constant value to the international longitude coordinate data (Ψw, λw, Hw). After this, new Bessel longitude coordinate data is obtained by adding this value to the international longitude coordinate data.

The SM conversion mode is known as a standard Molodensky coordinate conversion method, and displacements of latitude, longitude, and altitude (ΔΨ, Δλ, ΔH) using values (Xw, Yw, Zw) converted from the international longitude coordinate data into a centroid coordinate system. After obtaining, the new Bessel longitude coordinate data is obtained by adding this value to the international longitude coordinate data.

In addition, the MB conversion mode is known as a Molodensky Badekas coordinate conversion method, and the value obtained by converting the international longitude coordinate data into a centroid coordinate system ( , , ) And the center coordinate system of the Bessel ellipsoid ( , , Using the seven parameters (ω, ψ, χ, X, ΔY, ΔZ), calculate the latitude, longitude, and altitude of displacement (Δψ, Δλ, ΔH), and then add them back to the values of the international longitude coordinate data Obtain new Bessel longitude coordinate data.

Finally, the B-W conversion mode obtains Bessel latitude and longitude coordinate data by almost the same method as the M-B conversion mode, but the B-W conversion mode is suitable for a local small area, whereas the M-B conversion mode is suitable for a national wide area.

As described above, the calculation unit 24 converts the international longitude coordinate data into the Bessel longitude coordinate data according to a method desired by the conversion mode, and then converts the coordinates into planar rectangular coordinate data again (S5).

The method of converting to Cartesian coordinates may be performed using Gauss-Kruger projection, which is a TM projection method currently used in general geodetic systems in Korea.

After the process of converting the international elliptic coordinates received from the GPS into the Bessel elliptic coordinates by the above method, the GPS system can obtain more accurate information about the current position.

The calculator 24 obtains the planar coordinate data from the international latitude and longitude coordinate data according to the precision coordinate analysis method as described above, and then the rectangular coordinate converted from the terrain data storage unit 20 through the precision coordinate analysis process belongs. The local section is called (S6), and the searched and extracted important features closest to the rectangular coordinates in the searched regional section are extracted (S7).

When the important feature is extracted as described above, the related information such as the relative distance and the direction of the important feature required by the user is calculated therefrom (S8), and the result is output together with the property of the important feature. If output to the unit, the voice support guide method according to the present invention is completed. (S9)

In this example, the final calculation result is output

"The town hall is 25 meters from the left (right) direction"

As a specific method for realizing such a voice output, first, the voice information modulator 28 modulates the important feature information into voice data, and amplifies it into an audible frequency region as a voice amplifier 30 to generate a speaker. 32) can be used for the output method.

As mentioned above, although the Example of this invention was described, this invention is not limited only to said Example, Of course, various other deformation | transformation and a change are possible, of course.

For example, in the exemplary embodiment of the present invention, only the voice support location guide system for important features used for general purpose for the blind, etc. may be implemented, but the same may be implemented for the voice support location guide system used for military purposes.

The voice guidance system and the voice guidance method according to the present invention made as described above can accurately interpret the position data received from the GPS without an additional device, and thus can be configured with a simpler structure.

In addition, since the product can be manufactured compactly and the product cost can be reduced, the wider popularization of the voice support guidance system using GPS can be realized.

Claims (4)

Receiving unit for receiving international longitude coordinate data from GPS satellites, Terrain data storage unit for dividing the topographic map produced by aerial photographs by region and storing only the important features digitized, Data and terrain data received from the receiver In a voice guidance system using a GPS reception signal comprising a calculation unit for comparing and calculating the data stored in the storage unit, and an output unit for outputting the results calculated by the operation unit in voice, Including an input unit for receiving the conversion mode from the user, The calculation unit A first coordinate conversion step of converting the international longitude and latitude coordinate data into vessel longitude coordinate data for each conversion mode inputted by the input unit; A second coordinate conversion step of converting the Bessel longitude coordinate data converted in the first coordinate conversion step into planar rectangular coordinate data; An area section calling step of calling an area section to which the planar coordinate data converted in the second coordinate conversion step belongs from a terrain data storage unit; An extraction step of extracting an important feature closest to the plane rectangular coordinate data from the important feature data stored in the area code called in the area code call step; Related information operation step of calculating the relevant information about the important feature required by the user from the important feature extracted in the extraction step Voice guidance system through the precise coordinate analysis of the GPS signal receiving, characterized in that for performing. An eleventh step S1 of receiving current position data of the moving object from a GPS satellite through a receiving unit; A twelfth step (S2) of converting the current position data received in the eleventh step into international longitude coordinate data; A thirteenth step (S3) of receiving a coordinate data conversion mode from a user through an input unit; A fourteenth step (S4) of converting the international longitude and latitude coordinate data converted in the twelfth step into Bessel longitude and latitude coordinate data for each conversion mode received in the thirteenth step; A fifteenth step S5 of converting the Bessel longitude coordinate data converted in the fourteenth step into planar rectangular coordinate data; A sixteenth step (S6) of calling the area section to which the planar rectangular coordinate data converted in the fifteenth step belongs from the terrain data storage unit; A seventeenth step (S7) of extracting an important feature closest to the plane rectangular coordinate data from the important feature data stored in the region section called in step 16; An eighteenth step (S8) of calculating related information on the important feature required by the user from the important feature extracted in the seventeenth step; Voice guidance method through the precise coordinate analysis of the GPS signal received in the nineteenth step (S8) for outputting the important feature information calculated in the eighteenth step by voice. In claim 2, The nineteenth step may include a twentieth step (S10) of modulating important feature information into voice data; A twenty-first step (S11) of amplifying the voice data modulated in the twentieth step into an audible frequency domain; And a twenty-second step (S12) of outputting the voice data amplified in the twenty-first step through a speaker. A first coordinate conversion step (S4) of converting international latitude and longitude coordinate data received from the GPS satellites into vessel longitude and latitude coordinate data; And a second coordinate conversion step (S5) of converting the Bessel longitude coordinate data converted in the above step into planar rectangular coordinate data (S5).