KR100405619B1 - Direction-finding system embedded in wireless telecommunication devices for sensing geographical magnetic field - Google Patents

Abstract

The present invention relates to a direction detection system having an earth magnetic field measurement function mounted in a mobile communication device. The present invention relates to a geomagnetic field measurement device such as a compass or a magnetometer, such as a mobile communication terminal, a smart phone, a PDA, an IMT 2000, and a hand. Mounted in a mobile station such as a Hold GPS system, the user can provide information on the user's location and direction of movement using the wireless system to the user in real time using a simple symbol such as an arrow. It is to make it easier and intuitive to determine their location information and the direction of travel to the destination.

The present invention is equipped with a compass or a magnetometer (magnetometer) having a global magnetic field measurement function-all devices capable of measuring the earth's magnetic field other than the compass and magnetometer-in the mobile communication device as an independent module, the direction of the mobile communication device itself Providing a constant bearing value at all times regardless of conversion; And

And providing location information and direction information to a user using the mobile communication device by using the azimuth value provided by the earth magnetic field measurement.

Description

Direction-finding system embedded in wireless telecommunication devices for sensing geographical magnetic field}

The present invention relates to a direction detection system and method having a geomagnetic field measurement function mounted in a mobile communication device, and includes a magnetic field measurer such as a compass or a magnetometer such as a mobile communication terminal, a smart phone, a PDA, an IMT 2000, In addition, the user can be mounted on a mobile station such as a handheld GPS system to provide the user with information about the user's location and direction of movement using a simple symbol such as an arrow to the user in real time. It is to make it easier and intuitive to determine their location information and the direction of travel to the destination.

The compass was used by ancient Chinese merchants to travel along the Silk Road using natural magnets, or as a means of long-range navigation. In the 17th century, British Gilbert assumed the earth to be a giant magnet and used a spherical magnet to create a magnetic field on the earth's surface. It began to be used in earnest from the investigation. However, the true north, magnetic north, and grid north of the earth are not really the same (Fig. 1, Fig. 2), and the earth's geographical and magnetic axes are inclined about 11.5 (Fig. 1). Currently, the Earth's magnetic north pole is located at 79.3N, 71.5W, and the Earth's magnetic north pole is located at 79.3S, 108.5E. The Earth's magnetic north pole is located near Hudson Bay, northern Canada, about 1,800 km from the geographical north pole. have.

For this reason, in order to check the position by using a compass, as shown in Fig. 2, the deviation taking into account the magnetic declination angle, the magnetic declination angle, the ceramic angle, and the magnetic angle shifting westward by 1 to 1.5 irregularly every year It should be corrected using angles.

However, the compass using the earth's magnetic field is easily affected by the interference effect of the local magnetic field around the compass in addition to the earth's magnetic field. In fact, you should not have a magnetic object within at least 2 meters to determine the position using the compass. However, if there must be an object with a magnetic field around the compass, it can be recalculated using a correction factor on the assumption that the magnetic field of the object with the magnetic field is constant over time.

The strength of the earth's magnetic field varies slightly depending on the region and altitude, but the earth's magnetic field is about 0.5G measured on the Korean peninsula. If the local magnetic field generated in a wireless system such as a mobile communication terminal is much smaller than the earth magnetic field and the amount is constant with respect to time, real-time direction detection is possible using a wireless system equipped with a compass or a magnetometer.

Indeed, the strength of magnetic fields in wireless systems is allowed in the range of about 15% of the earth's magnetic field, and the magnitude of the magnetic field generated during call waiting or during a call is constant. Therefore, according to the above description, a compass or a magnetometer may be mounted in a wireless system, and a real-time direction detection system may be implemented by using a correction factor for a local magnetic field.

Currently, a geographic information system using a wireless system is simply provided with two-dimensional electronic map data from a GIS content provider or a handheld GPS system mounted on the wireless system to display its location on an electronic map. This handheld GPS / GIS interworking system has the advantage of displaying the user's location as a coordinate value on the electronic map, but it is difficult to use for those who do not have basic knowledge of Dokdo method, and it is easy to use the symbols on the map and It is difficult to achieve great utility in mobile communication devices with small display screens because it is necessary to check objects and determine their current location and direction of movement.

An object of the present invention for solving the above problems is to use a earth magnetic field meter such as a compass or a magnetometer (mobile), such as a mobile terminal, a smartphone, a PDA, and a handheld system such as a handheld GPS system (Mobile) Station) to provide the user with the location information and the direction of movement of the user using the wireless system to the user in real time with a simple symbol such as an arrow or a simple voice such as front, back, left, and right. It is to make it easier and more intuitive to determine the direction of travel to the destination.

Still another object of the present invention is to provide a method of quickly and conveniently intuitively checking a current position and a moving direction on an electronic map of a GIS system using a compass in a wireless system equipped with a GIS system.

It is still another object of the present invention to simplify the processing of position and direction in a wireless system equipped with a GPS and a GIS system, and to provide various additional service methods.

It is still another object of the present invention to provide an easily scalable service method by modularizing the system so that it can be extended to the extension of a direction detection system, an improved method of accurately calculating direction information, and a roaming service between another wireless system and a GIS content provider. will be.

1 is a view showing the geographical axis of the earth and the slope of the magnetic axis.

2 shows the true north, magnetic north, and grid of the earth.

North is actually not the same figure.

3 is an example of a geographic information system using a conventional wireless system.

4 is a direction detection in a wireless positioning system using a conventional GPS and GIS

A block diagram showing that the system is mounted.

5 is a direction detection system having a geomagnetic field measurement function mounted in a mobile communication device;

Detailed configuration diagram of the.

6 is an exemplary view of a wireless system internal coordinate system.

7 has a constant azimuth value regardless of the change of direction of the mobile communication device.

An example of the internal coordinate system.

8 is a diagram of a user's present information provided by a screen output interface of a direction detecting system;

An example of a symbol for indicating the direction of travel.

9 is a diagram of a user's present information provided by a screen output interface of a direction detecting system;

Another example of a symbol for indicating a progress direction.

10 is directly coupled GPS / GIS data to the direction detection system as shown in FIG.

To show the user's location and direction of travel.

11 is provided by a wireless positioning system using a conventional GPS and GIS

One example of the display screen.

12 is a display provided by the screen output interface of the direction detection system;

This is an example of the screen.

FIG. 13 illustrates an example of a display screen provided by matching FIGS. 11 and 12.

It is also.

14 shows a direction detection system equipped with a global magnetic field measurement function.

The internal configuration diagram of a mobile communication device (in the case of a personal mobile communication terminal (PCS)).

Figure 15 shows the destination and the shortest using the GIS system through the user query

Find a route and use it in a direction finding system in conjunction with a GPS system

This is a flow chart of the process of processing data.

16 is a real-time processing direction of the user in the direction detection system

A flowchart describing the method.

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

4: wireless position measurement system 40: GIS system

41: GPS system 42: direction finding system

43: GPS satellite 44: GIS wireless Internet content provider

421: Earth magnetic field measuring unit 422: Defense calculation unit

423: orientation correction system 424: coordinate transformation unit

425: direction output unit 426: screen output interface

427: LCD

5: GPS / GIS interworking system 51: GPS / GIS interface

52: GPS processing unit 53: GPS receiver

54: Wireless GIS Interface 55: GIS Geographic Information Processing Unit

56: user interface 57: query

58: input device

10: GPS / GIS output unit

141: RF processing unit 142: IF processing unit

143: BASEBAND processing unit 144: MEGNETOMETER or COMPASS

145: CPU 146: RAM ROM EEPROM

The present invention uses a wireless magnetic station such as a compass or magnetometer in a mobile station such as a mobile communication terminal, a smart phone, a PDA, and a handheld GPS system to use the wireless system. By providing information about the user's location and direction of movement to the user in real time with a simple symbol such as an arrow or a simple voice such as front, rear, left, and right, the user can easily and intuitively provide his or her location information and direction to the destination. To judge.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the elements of each drawing, it should be noted that the same elements are denoted by the same reference numerals as much as possible even if they are displayed on different drawings. In addition, in the following description, in order to explain the embodiments of the present invention, specific details such as specific components are shown, which are provided to help a more general understanding of the present invention, and the present invention may be practiced without these specific details. It will be apparent to those skilled in the art. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

4 is a block diagram showing that a direction detection system is mounted in a conventional wireless positioning system using GPS and GIS.

According to the present invention, a handheld GPS system 4 for locating a location using four GPS satellites 43 present on a horizon with respect to a user and transmitted from a GIS wireless Internet content provider 44 via a wireless Internet network is provided. This is accomplished by mounting the direction detection system 42 in an existing system that displays the user's current location on an electronic map using geographic information. Detailed description of the direction detection system is shown in FIG.

5 is a wireless system for realizing a direction detecting system 42 using a global magnetic field measuring device such as a compass or a magnetometer, and real-time processing of a user's position and direction using the GPS / GIS interworking system 5. A more detailed block diagram of the.

The GPS / GIS interworking system of FIG. 5 is a simplified internal block diagram of a pre-implemented geographic information and location detection system, and the present invention is achieved by adding a real-time direction detection system using a compass or a magnetometer to the system.

In the GPS / GIS interworking system 5, the user inputs data about the destination he wants to visit through the input device 58, and the user interface 56 processes this information to make a query, which is a wireless GIS interface. It transmits to the GIS content provider 44 through 54. The GIS content provider 44 that receives the inquiry generates geographic information data that can be used in the wireless system and transmits it to the wireless GIS interface 54 of the GPS / GIS interworking system 5. The geographic information data received from the GIS content provider 44 is processed into a form that can be linked to the GPS system and the direction detection system 42 in the GIS geographic information processing unit 55. The processed geographic information data is output on the screen 427 in conjunction with the position information of the GPS system, or used in the direction detection system 42 to determine the direction of the wireless system.

The earth magnetic field measuring unit 421 of the direction detecting system 42 detects the earth magnetic field by using a device such as a compass or a magnetometer. However, the earth's magnetic field is perturbed by a number of external factors occurring in the Van Allen Belt, and is also affected by external forces on the wireless system. Therefore, the earth magnetic field measuring unit 421 is basically equipped with a protection function so as not to cause erroneous operation due to perturbation and physical force.

The azimuth calculation unit 422 of the direction detection system 42 uses the data obtained from the earth magnetic field measuring unit 421 and the information obtained through the GPS / GIS interlocking system 5 with respect to the internal coordinate system of the wireless system (Fig. 6). Calculate the bearing. At this time, the orientation calculation unit 422 grasps various position information of the wireless system in real time as shown in FIG. 7, and is calculated to have a constant orientation value regardless of the direction of the wireless terminal itself.

The azimuth correction system 423 of the direction detection system 42 calculates the azimuth angle calculated by the azimuth calculation unit 422 for a magnetic azimuth angle, a declination angle, a ceramic angle, and a deviation angle, and adds the correction value to a wireless system. The azimuth value measured by the earth magnetic field measuring unit 421 is accurately recalculated by substituting a correction coefficient for the generated local magnetic field.

The coordinate conversion unit 424 of the direction detection system 42 uses the position data obtained from the GPS system, the electronic map and the shortest path data received from the GIS content provider 44, and the like, and the direction data corrected by the orientation correction system 423. Is converted to the coordinate system on the electronic map. The coordinate value and the shortest path data are used to calculate the distance from the wireless system to the destination.

The progress direction output unit 425 of the direction detection system 42 uses the data such as the current position obtained from the coordinate transformation unit 424, the orientation on the electronic map, the direction in which the wireless system is headed, and the shortest path. Determine the direction.

The screen output interface 426 of the direction detection system 42 uses the same method as in FIG. 8 or 9 to display the user's current progress direction. In addition, the screen output interface 426 provides the user with a simple voice signal such as "front-back-left-right" corresponding to a simple symbol such as an arrow as shown in FIG. 8 or 9.

FIG. 10 is a detailed block diagram of a user's location and direction of travel by directly combining GPS / GIS data with a direction detection system as shown in FIG. 5.

The function of each part of the direction detection system for directly outputting GPS / GIS data is consistent with the above-described Fig. 5. However, by mounting the GPS / GIS output unit 100 in FIG. 5, the screen as shown in FIG. 11 is generated, and the screen output interface is generated after the drawing 12 is generated by the traveling direction output unit 425 of the direction detection system 42. The difference is that the output screen as shown in FIG. 13 is generated at 426.

14 is an internal block diagram of a personal mobile communication terminal (PCS) equipped with a compass in a wireless system.

The mobile communication terminal is divided into an RF processor 141, an IF processor 142, and a BASEBAND processor 143. The real-time direction detection system is mounted as an independent module to reduce the internal load of the existing mobile communication terminal. In particular, the real-time direction detection system may be protected by using a magnetic shield in the RF processor 141 and the power supply device generating the magnetic field in the existing mobile communication terminal system. However, the real-time direction detection system does not use a device such as a magnetic shield to increase the efficiency of the magnetometer, and can use a power supply system independent of the existing mobile communication system to minimize the influence of the internal magnetic field.

The real-time direction detection system shares resources such as RAM, ROM, EEPROM, and storage devices such as SMART DRIVE 146 with the CPU 145 of the BASEBAND processing unit 143 in the part requiring internal operation, and the part requiring user input. Share input devices such as microphones and keyboards. And share the speaker with the LCD to output the direction information.

15 is a flowchart of a process in which a user finds a destination and a shortest path using a GIS system through a query, and processes data in order to use the GPS system in conjunction with a GPS system.

The direction detection system user determines the destination and the current vehicle through the input device and the user interface (151). If the destination input by the user is a location 152 displayed on a map such as an address or a building name (153), a query to request a GIS content provider is generated (156). However, if the destination cannot use the GIS geographic information directly, the wireless system automatically or manually requests the current location of the other party's mobile terminal at the destination (154), and then uses the location information to make a query request to the GIS content provider. Create 155.

The generated query is transmitted to the GIS content provider through the wireless Internet network (157), and the GIS content provider determines the shortest path to the destination by using the GIS geographic information necessary for the wireless system and the transportation method selected by the user. The query is sent to the requesting wireless system (158). Geographic information received from the GIS content provider interworkes with the GPS system to identify the current location of the user and processes it to be used in the direction detection system (159).

16 is a flowchart illustrating a method of real-time processing of a user's moving direction in a direction detecting system.

After geographic information such as electronic map data, coordinate values, and shortest path data obtained from the GIS content provider are processed, the direction detection system measures the direction of the wireless system with respect to the earth magnetic field using the earth magnetic field measuring unit (161). The measured earth magnetic field is calculated by referring to the internal coordinate system of the wireless system (Fig. 6) and GIS geographic information (162), corrects information on magnetic declination, declination angle, ceramic angle (163), and is set in the wireless system. The correction coefficient is corrected to correct the interference effect on the internal magnetic field (164), and the current user's position is displayed on the coordinates in conjunction with the GPS system (165). If it is confirmed at this time that the user's location exists in the given path (166), the direction detection system outputs the user's next direction on the screen (167). On the contrary, if the current user's location is out of the path or in the other direction, the direction detection system warns the user by using a method such as text, symbol, or voice (168), and then corrects the corrected direction. Output to the screen (169).

As described above, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

According to the present invention, an earth magnetic field meter such as a compass or a magnetometer is mounted on a mobile station such as a mobile communication terminal, a smart phone, a PDA, and a handhold GPS system to use the wireless system. By providing information about the user's location and direction of movement to the user in real time in a simple voice, such as an arrow or a simple voice such as front, rear, left, and right, it is possible to easily solve the problems of the existing positioning and geographic information system. In other words, even users without basic knowledge of Dokdo method have the advantage of making it easier and more intuitive to determine their location information and direction to destination with a simple arrow or voice provided by calculating and analyzing the earth magnetic field. Instead of checking the symbols on the map and the objects in the real space, you can determine your current position and direction simply by using the simple arrow or voice provided by the present invention. It provides an easy to use effect.

Claims (13)

A compass or magnetometer having a global magnetic field measurement function is mounted in a mobile communication device as an independent module to provide a constant azimuth value at all times regardless of the change of direction of the mobile communication device itself. In the direction detection system with the measured earth magnetic field, The specific azimuth data provided by the earth magnetic field measurement and the electronic map provided from a geographic information system (GIS) content provider and the mobile communication device location data extracted in association with a global positioning system (GPS) system are interconnected to each other. A coordinate conversion unit for converting and providing location information and direction information of a user who uses a mobile communication device into a coordinate system on an electronic map; The mobile communication device is used by using the current position data of the mobile communication device provided by being converted into a coordinate system on the electronic map by the coordinate conversion unit, orientation data on the electronic map, and direction data facing the mobile communication device. A progress direction output unit configured to determine a progress direction of a user to use; And The driving direction data of the user using the mobile communication device determined by the traveling direction output unit is output to be simultaneously displayed on a single screen by matching the electronic map with a simple symbol including an arrow, and linked with the traveling direction output unit. And an output unit configured to display and output an electronic map including a simple symbol including the arrow displayed on the single screen at a constant orientation at all times according to a specific azimuth value provided by the earth magnetic field measurement. Direction detection system with earth magnetic field measurement function installed in mobile communication device. According to claim 1, wherein the direction detection system, An earth magnetic field measuring unit configured to prevent the earth magnetic field detected by a compass or a magnetometer having the earth magnetic field measuring function from perturbation caused by external factors and malfunction due to physical force; An azimuth calculation unit configured to calculate an azimuth of an internal coordinate system of the mobile communication device using data obtained from the earth magnetic field measuring unit and information obtained through a GPS / GIS interworking system; And And an azimuth correction system for recalculating azimuth values measured by the earth magnetic field measurement unit by applying a correction value for a magnetic azimuth angle, a declination angle, a ceramic angle, and a deviation angle to the azimuth value calculated by the azimuth calculation unit. Direction detection system with earth magnetic field measurement function mounted in mobile communication device. delete delete delete The method of claim 2, wherein the orientation calculation unit A geomagnetic field measurement function mounted in the mobile communication device, characterized in that it further comprises a function of grasping the position information of the mobile communication device in real time and having a constant bearing value regardless of the direction of the mobile communication device itself. Direction detection system. The method of claim 2, wherein the orientation correction system, And recalculating the azimuth value measured by the earth magnetic field measurement unit by applying a correction factor for a local magnetic field generated by the mobile communication device in addition to correcting the azimuth angle, magnetic inclination angle, ceramic angle, and deviation angle. Direction detection system having a geomagnetic field measurement function mounted in the mobile communication device, characterized in that made. The method of claim 1, wherein the coordinate conversion unit And a function of calculating a distance from a current location of a user who uses the mobile communication device to a destination and providing the calculated distance from the earth magnetic field. The method of claim 1, wherein the screen output interface, Measurement of the earth magnetic field mounted in the mobile communication device, further comprising a function of providing the user with a voice such as "before-after-left-right" in real time of the user of the mobile communication device. Direction detection system with function. The method of claim 1, When the direction detection system is mounted as an independent module in the mobile communication device, the RF processing unit for generating a magnetic field in the existing mobile communication device and a magnetic shield for preventing a collision between the power supply and the direction detection system further comprises Direction detection system with earth magnetic field measurement function mounted in a mobile communication device. The method of claim 1, When the direction detection system is mounted as an independent module in the mobile communication device, And a geomagnetic field measurement function mounted in the mobile communication device, wherein the direction detection system is mounted as a power supply system independent from the mobile communication system. The method of claim 1, When the direction detection system is mounted as an independent module in the mobile communication device, The direction detection system, A BASEBAND processor including at least one CPU, RAM, ROM, and EEPROM capable of internal operations; And And a memory storage device. The direction detecting system having the earth magnetic field measurement function mounted in the mobile communication device. According to claim 1, wherein the direction detection system, Real-time check whether the location of the user using the mobile communication device exists in a given path, and outputs the next direction of the user on the screen, the current user's location is out of the given path or proceeds in a different direction If it is confirmed that, in conjunction with at least one output means of the text, symbol, voice in the mobile communication device characterized in that it further comprises a function for notifying the user of the path departure warning and outputting the corrected direction on the screen Direction detection system with on-board earth magnetic field measurement.