WO2017200122A1

WO2017200122A1 - Position tracking device, second position tracking device, and position tracking system

Info

Publication number: WO2017200122A1
Application number: PCT/KR2016/005285
Authority: WO
Inventors: 김태형; 이은주; 김성진
Original assignee: 엘지전자 주식회사
Priority date: 2016-05-18
Filing date: 2016-05-18
Publication date: 2017-11-23

Abstract

Disclosed is a position tracking device. A position tracking device according to an embodiment of the present invention comprises: a transmitter for emitting an electromagnetic field for acquiring position information of at least one of a wearable receiver, a fixed receiver, and a second position tracking device; a communication unit for communicating with an external device; and a control unit for controlling the transmitter to emit the electromagnetic field, and receiving position information of the second position tracking device from the second position tracking device when a distance from the second position tracking device is within a preconfigured distance.

Description

Location tracking device, second location tracking device and location tracking system

The present invention provides a location tracking device, a second location tracking device, and a location tracking system in which, when there are a plurality of location tracking devices, one or more location tracking devices can be converted into a transmitter or receiver based on the distance between the location tracking devices. It is about.

The present invention also relates to a location tracking device, a second location tracking device, and a location tracking system capable of determining an absolute location of a user using a fixed receiver when the transmitter is mounted to the user.

Recently, a technology for providing a virtual reality (VR) view or an augmented reality (AR) view according to a movement of a user wearing a wearable device has been introduced.

A typical example is a HEAD MOUNTED DISPLAY (HMD) device that displays a virtual reality (VR) view or an augmented reality (AR) view by tracking a user's position when the user wears glasses as if the user wears glasses.

Meanwhile, as a method of tracking a user's position in virtual reality (VR) or augmented reality (AR), a camera-based method is widely used, but a camera can be tracked when a tracking target is hidden. There are a number of problems that can occur, and thus, in recent years, a method using an electromagnetic field has been used to compensate for these disadvantages.

Specifically, the position tracking method using an electromagnetic field is a method of determining the relative position of the receiver relative to the transmitter by emitting an electromagnetic field in the three-axis electromagnetic transmitter and receiving the electromagnetic field emitted in the three-axis receiver.

For example, when a user wears a HEAD MOUNTED DISPLAY (HMD) device with a transmitter attached to his head and a receiver on both arms and legs, the HEAD MOUNTED DISPLAY (HMD) device uses both head-to-head legs You can get the position coordinates or the direction coordinates of.

However, there may be an environment in which a plurality of users each equipped with a plurality of location tracking devices are in one space. For example, a plurality of users wear a HEAD MOUNTED DISPLAY (HMD) device and receivers, each of which is equipped with a location tracking device, in a room and play a game using a virtual reality image.

In this case, when a single transmitter is used, the electromagnetic field must be hardened to increase the recognition range, which may cause a problem that may be harmful to the human body.

In addition, when a plurality of transmitters that emit relatively weak electromagnetic fields are used, problems may arise due to frequency interference between the plurality of positioning devices when the transmitters approach each other, and the plurality of position tracking devices may be used to prevent frequency interference. Setting different frequencies for each device has disadvantages in product design and cost.

In addition, when the transmitter is fixed to the outside or mounted on a HEAD MOUNTED DISPLAY (HMD) device, it is possible to determine the relative position of the receiver relative to the transmitter, but there was a problem in that the absolute position of the transmitter could not be determined.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to convert one or more location tracking devices into transmitters or receivers based on the distance between the location tracking devices when a plurality of location tracking devices exist. A location tracking device, a second location tracking device and a location tracking system.

The present invention also relates to a location tracking device, a second location tracking device and a location tracking system that can determine the absolute location of the user using a fixed receiver when the transmitter is mounted to the user.

The position tracking device according to an embodiment of the present invention, a transmitter for emitting an electromagnetic field for obtaining the position information of at least one of the wearable receiver, the fixed receiver and the second position tracking device, a communication unit for communicating with an external device, and the The transmitter may be configured to control the transmitter to emit an electromagnetic field, and receive location information of the second location tracking device from the second location tracking device when the distance to the second location tracking device is within a preset distance. .

In addition, the second position tracking device according to an embodiment of the present invention, the transmitter for emitting an electromagnetic field for obtaining the position information of at least one of the wearable receiver and the fixed receiver, the receiver for sensing the electromagnetic field emitted from the position tracking device, the external And a communication unit communicating with the device, and controlling the transmitter to emit the electromagnetic field when the distance to the position tracking device is greater than or equal to a preset distance, and emitting the electromagnetic field when the distance to the position tracking device is within a preset distance. And a control unit which stops and transmits the location information of the second location tracking device obtained based on the sensed electromagnetic field to the location tracking device.

In addition, according to an embodiment of the present invention, a location tracking system including a host, a location tracking device and a second location tracking device, regardless of the distance to the location tracking device, wearable receiver, fixed receiver and the second location A position tracking device that emits an electromagnetic field for acquiring position information of at least one of the tracking devices. A second position tracking device for emitting an electromagnetic field, and a control command for stopping the emission of the electromagnetic field of the second position tracking device based on the information about the distance between the position tracking device and the second position tracking device. Transmit to the second positioning device or cause the second positioning device to emit an electromagnetic field. A control command for the first host may include a transmitting device to a second location.

The present invention provides a virtual reality world by arranging a fixed receiver in a range of behavior of a user wearing a first location tracking device and using the fixed receiver to determine an absolute position of the user wearing the first location tracking device. The location of the user within the device may be determined and a virtual reality image corresponding thereto may be provided.

In addition, in the present invention, even if there are two or more users in a specific space, since each location tracking device operates as a transmitter, in order to increase the recognition range (that is, to locate both the first user and the second user). The advantage is that there is no need to increase the strength of the electromagnetic field.

1 is a view for explaining a location tracking system according to an embodiment of the present invention.

2A is a block diagram illustrating a configuration of a first location tracking apparatus according to an embodiment of the present invention.

2B is a block diagram illustrating a configuration of a second location tracking device according to an embodiment of the present invention.

3 is a flowchart illustrating an operation of a first location tracking apparatus according to an embodiment of the present invention.

4 is a flowchart illustrating an operation of a second location tracking apparatus according to an embodiment of the present invention.

5 to 6 are diagrams for describing problems that may occur when two location tracking devices exist in a system for tracking a user location using an electromagnetic field.

7 to 8 are views for explaining the operation of the first location tracking device and the second location tracking device when the user starts using the HEAD MOUNTED DISPLAY (HMD) device according to an embodiment of the present invention.

9 is a view for explaining an operation method when the distance between the first location tracking device and the second location tracking device is greater than or equal to a preset distance according to an embodiment of the present invention.

FIG. 10 is a diagram for describing an absolute position obtaining method when a distance between a first location tracking device and a second location tracking device is greater than or equal to a preset distance according to an embodiment of the present disclosure.

FIG. 11 is a diagram for describing a method for acquiring a relative position of a wearable receiver when a distance between a first location tracking device and a second location tracking device is greater than or equal to a preset distance according to an embodiment of the present disclosure.

12 to 13 are diagrams illustrating a method of obtaining information about a distance between a first location tracking device and a second location tracking device according to an embodiment of the present invention.

FIG. 14 is a diagram for describing operations of the first location tracking device and the second location tracking device when the distance between the first user and the second user is close according to an embodiment of the present disclosure.

FIG. 15 is a diagram for describing an absolute position determining method of a first location tracking device in a state where a distance between a first user and a second user is close according to an embodiment of the present disclosure.

FIG. 16 illustrates one or more wearable receivers worn by a first user, one or more wearable receivers worn by a second user, and a second location tracking when a distance between the first location tracking device and the second location tracking device is within a preset distance. A diagram for explaining a method of determining the relative position and the absolute position of the device.

FIG. 17 is a diagram for describing an operating method when a distance between a first user and a second user is further removed according to an embodiment of the present disclosure.

18 to 19 are diagrams for describing an operating method when there are three or more users according to an exemplary embodiment of the present invention.

20 is a view for explaining a location tracking system further including a host according to an embodiment of the present invention.

FIG. 21 is a diagram illustrating a virtual reality image provided to a plurality of users wearing location tracking apparatus in spaced spaces according to an embodiment of the present invention.

FIG. 22 illustrates a virtual reality image provided to users according to an embodiment of the present invention. FIG.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, and the same or similar components are denoted by the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. The suffixes "module" and "unit" for components used in the following description are given or used in consideration of ease of specification, and do not have distinct meanings or roles from each other. In addition, in describing the embodiments disclosed herein, when it is determined that the detailed description of the related known technology may obscure the gist of the embodiments disclosed herein, the detailed description thereof will be omitted. In addition, the accompanying drawings are intended to facilitate understanding of the embodiments disclosed herein, but are not limited to the technical spirit disclosed herein by the accompanying drawings, all changes included in the spirit and scope of the present invention. It should be understood to include equivalents and substitutes.

According to an embodiment of the present disclosure, the location tracking system 10 may include a first location tracking device 100 worn by a first user, a second location tracking device 200 worn by a second user, and a first user. One or more

wearable receivers

151 and 152 worn, one or more

wearable receivers

251 and 252 worn by a second user, and one or more

fixed receivers

51, 52, 53, and 54 may be included.

The first position tracking device 100 may include at least one of one or more

wearable receivers

151, 152, 251, and 252, one or more

fixed receivers

51, 52, 53, and 54, and a second position tracking device 200. It may emit an electromagnetic field for obtaining location information. The electromagnetic field emitted may be a three-axis electromagnetic field.

The second location tracking device 200 generates an electromagnetic field for obtaining location information of at least one of the one or more

wearable receivers

251 and 252 and the one or more

fixed receivers

51, 52, 53, and 54 worn by the second user. Can be released. The electromagnetic field emitted may be a three-axis electromagnetic field.

In addition, when the distance from the first location tracking device 100 is greater than or equal to a predetermined distance, the second location tracking device 200 may emit an electromagnetic field.

In addition, when the distance from the first location tracking device 100 is within a predetermined distance, the second location tracking device 200 stops the emission of the electromagnetic field and the location information of the second location tracking device 200 is tracked by the location tracking device 100. ) Can be sent.

Here, the location information of the second location tracking device 200 is obtained by sensing the electromagnetic field emitted by the first location tracking device 100, and the second location tracking based on the first location tracking device 100. Location coordinates and direction coordinates of the device 200.

Meanwhile, the first location tracking device 100 and the second location tracking device 200 may be mounted on a HEAD MOUNTED DISPLAY (HMD) device, respectively. The HEAD MOUNTED DISPLAY (HMD) device is a wearable display device that can be worn as a user wears glasses and displays an image.

However, the present invention is not limited thereto, and the first location tracking device 100 and the second location tracking device 200 may be attached to a specific body part separately from the HEAD MOUNTED DISPLAY (HMD) device.

The

wearable receivers

151, 152, 251, and 252 are used to grasp the motion of the user's body part and may be attached to not only the user's wrist but also all parts of the body such as the knee, foot, and elbow.

Meanwhile, each of the

wearable receivers

151, 152, 251, and 252 may include a three-axis coil (not shown) and a communication unit (not shown).

Meanwhile, when each of the

wearable receivers

151, 152, 251, and 252 senses an electromagnetic field emitted from the first position tracking device 100, the

wearable receivers

151, 152, Each location information may be transmitted to the first location tracking device 100 through the communication unit. Here, the position information of each of the

wearable receivers

151, 152, 251, and 252 based on the first position tracking device 100 is based on the

wearable receivers

151, 152, 251 based on the first position tracking device 100. 252) may include respective position coordinates and direction coordinates.

In addition, each of the

wearable receivers

251 and 252 worn by the second user, when the electromagnetic field emitted from the second position tracking device 200 is detected, wearable receiver 251 based on the second position tracking device 200. 252) Each location information may be transmitted to the second location tracking device 200 through the communication unit. Here, the location information of each of the

wearable receivers

251 and 252 based on the second location tracking device 200 may include location coordinates of each of the

wearable receivers

251 and 252 based on the second location tracking device 200. It may include direction coordinates.

Meanwhile, the one or more

fixed receivers

51, 52, 53, and 54 are for determining an absolute position of the user and may be fixedly positioned in the activity area of the user.

Meanwhile, each of the one or more

fixed receivers

51, 52, 53, and 54 may include a triaxial coil (not shown) and a communication unit (not shown).

On the other hand, each of the at least one fixed receiver (51, 52, 53, 54), if the electromagnetic field emitted from the first position tracking device 100 is detected, the fixed receiver 51, based on the first

position tracking device

100, 52, 53, and 54 may transmit the location information to the first location tracking device 100 through the communication unit. Herein, the position information of each of the fixed

receivers

51, 52, 53, and 54 based on the first position tracking device 100 is fixed

receivers

51, 52, and 53 based on the first position tracking device 100. 54) may include respective position coordinates and direction coordinates.

In addition, each of the one or more

fixed receivers

51, 52, 53, and 54 may detect the electromagnetic field emitted from the second location tracking device 200, and then, if the electromagnetic field emitted from the second location tracking device 200 is detected, the fixed

receivers

51, 52, 53, and 54 may transmit the location information to the second location tracking device 200 through the communication unit. Here, the position information of each of the fixed

receivers

51, 52, 53, and 54 based on the second position tracking device 200 is fixed

receivers

51, 52, and 53 based on the second position tracking device 200. 54) may include respective position coordinates and direction coordinates.

The first location tracking apparatus 100 may include a control unit 110, a communication unit 120, and a transmitter 130.

The transmitter 130 may emit an electromagnetic field. Specifically, the transmitter 130, under the control of the control unit 120, one or more wearable receivers (151, 152, 251, 252), one or more fixed receivers (51, 52, 53, 54) and the second position tracking device ( An electromagnetic field for acquiring position information of at least one of 200 may be generated, and the generated electromagnetic field may be emitted. Here, the electromagnetic field emitted may be a three-axis electromagnetic field.

Meanwhile, the wearable receiver that detects the electromagnetic field by receiving the electromagnetic field emitted by the transmitter 130 of the first position tracking device 100 may be worn by the second user as well as the

receivers

151 and 152 worn by the first user.

Receivers

251 and 252 may be included.

The communicator 120 may communicate with an external device. In detail, the communicator 120 may communicate with at least one of the one or more

wearable receivers

151, 152, 251, and 252, the one or more

fixed receivers

51, 52, 53, and 54, and the second location tracking device 200. Can be.

In addition, the communication unit 120 may communicate with at least one of a server and an external control device.

Meanwhile, the communication unit 120 may include Bluetooth ™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, Near Field Communication (NFC), and Wi-Fi (Wireless). It may communicate with an external device using at least one communication method of fidelity, Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus).

The controller 110 may control the transmitter 130 to generate and emit an electromagnetic field.

In addition, when the location information is received from the at least one fixed

receiver

51, 52, 53, 54 by emitting an electromagnetic field, the controller 110 may determine the position of the at least one fixed

receiver

51, 52, 53, 54 that is received. The information on the absolute position of the first location tracking apparatus 100 may be obtained based on the information.

In addition, when the distance to the second location tracking device 200 is within a predetermined distance, when the electromagnetic field is emitted, the control unit 110 from the second location tracking device 200 location information of the second location tracking device 200. Can be received.

In addition, when the location information of the second location tracking device 200 is received from the second location tracking device 200, the controller 110 uses the location information of the second location tracking device 200 to locate the first location tracking device. The information on the relative position of the second location tracking apparatus 200 based on 100 may be obtained.

In addition, by using the information on the absolute position of the first position tracking device 100 and the information on the relative position of the second position tracking device 200, the control unit 110 is the absolute position of the second position tracking device 200. Information about the location can be obtained.

In addition, when the distance from the second location tracking device 200 is greater than or equal to the preset distance, the controller 110 may be configured to obtain a second location tracking device (obtained by the second location tracking device 200 from the second location tracking device 200). By receiving the information about the absolute position of the 200, it is possible to obtain information about the absolute position of the second position tracking device 200.

In addition, based on the information on at least one of the absolute position of the first position tracking device 100, the absolute position of the second position tracking device 200 and the relative position of the second position tracking device 200, the control unit 110 ) May obtain information about a distance between the first location tracking device 100 and the second location tracking device 200.

On the other hand, when the distance to the second position tracking device 200 is within a predetermined distance in a state of more than the predetermined distance, the control unit 110 controls the second position tracking device 200 to stop the emission of the electromagnetic field. May be transmitted to the second location tracking device 200.

In addition, when the distance from the second location tracking device 200 is greater than or equal to the preset distance in a state within the predetermined distance, the controller 110 issues a control command for causing the second location tracking device 200 to emit an electromagnetic field. It may transmit to the second location tracking device 200.

In addition, when the electromagnetic field is emitted, the controller 120 may receive the position information of the

wearable receivers

151, 152, 251, and 252 from the

wearable receivers

151, 152, 251, and 252. In addition, based on the received positional information of the

wearable receivers

151, 152, 251, and 252, the controller 120 may refer to the

wearable receivers

151, 152, 251, and 252 based on the first position tracking device 100. Information about the relative position of the can be obtained.

The second location tracking device 200 may include a control unit 210, a communication unit 220, a transmitter 230, and a receiver 240.

The transmitter 230 may emit an electromagnetic field. Specifically, the transmitter 230, under the control of the controller 210, an electromagnetic field for acquiring position information of at least one of the one or more

wearable receivers

251 and 252 and the one or more

fixed receivers

51, 52, 53, and 54. And generate the generated electromagnetic field. Here, the electromagnetic field emitted may be a three-axis electromagnetic field.

The wearable receiver for detecting the electromagnetic field emitted by the transmitter 230 of the second location tracking apparatus 200 may be a

wearable receiver

251 or 252 worn by a second user.

Meanwhile, the communication unit 220 may communicate with an external device. In detail, the communicator 220 may communicate with at least one of the

wearable receivers

251 and 252, the at least one fixed

receiver

51, 52, 53, and 54, and the first location tracking apparatus 100.

In addition, the communication unit 220 may communicate with at least one of a server and an external control device.

On the other hand, the communication unit 220 is Bluetooth (Bluetooth ™), RFID (Radio Frequency Identification), Infrared Data Association (IrDA), UWB (Ultra Wideband), ZigBee, Near Field Communication (NFC), Wi-Fi (Wireless) It may communicate with an external device using at least one communication method of fidelity, Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus).

Meanwhile, the receiver 240 may detect the electromagnetic field emitted from the first location tracking device 100.

The controller 210 may control the transmitter 230 to generate and emit an electromagnetic field. In this case, when the distance from the position tracking device 100 is greater than or equal to a predetermined distance, the controller 210 may control the transmitter 230 to emit an electromagnetic field.

In addition, when the position information is received from the at least one fixed

receiver

51, 52, 53, 54 by the electromagnetic field being emitted, the controller 210 may determine the position of the at least one fixed

receiver

51, 52, 53, 54 that is received. The information on the absolute position of the second location tracking apparatus 200 may be obtained based on the information.

In addition, when the information on the absolute position of the second position tracking device 200 is obtained, the controller 210 may obtain the information on the absolute position of the second position tracking device 200 obtained by the first position tracking device 100. Can be sent to.

On the other hand, if the distance to the first position tracking device 100 is within a predetermined distance, the control unit 210 stops the emission of the electromagnetic field, the second position tracking device obtained based on the electromagnetic field detected by the receiver 240 ( The location information of 200 may be transmitted to the first location tracking device 100.

On the other hand, when the distance to the first position tracking device 100 is within a predetermined distance in a state of more than a predetermined distance, the control unit 210 to control the command to stop the emission of the electromagnetic field of the second position tracking device 200. Can be received from the location tracking device 100 through the communication unit 220.

In addition, when the distance from the first location tracking device 100 is greater than or equal to the predetermined distance in a state within the predetermined distance, the controller 210 issues a control command for causing the second location tracking device 200 to emit an electromagnetic field. It may be received from the location tracking device 100 through the communication unit 220.

On the other hand, when the electromagnetic field is emitted from the transmitter 230, the controller 210 receives the position information of the at least one wearable receiver (251, 252) from the at least one wearable receiver (251, 252), the received wearable receiver ( Information on the relative positions of the

wearable receivers

251 and 252 may be obtained based on the location information of the 251 and 252.

Meanwhile, the frequency of the electromagnetic field emitted from the transmitter 130 of the first location tracking device 100 and the frequency of the electromagnetic field emitted from the transmitter 230 of the second location tracking device 200 may be the same.

In FIG. 2A, the first location tracking apparatus 100 is described as not including a receiver, but is not limited thereto.

For example, since the first location tracking device 100 includes a receiver (not shown), the first location tracking device 100 and the second location tracking device 200 may include the same configuration. That is, when the product is released, the same product may be released without the distinction between the first location tracking device 100 and the second location tracking device 200, and in this case, the specific location tracking device may track the first location by various methods. Another location tracking device may be determined as the second location tracking device 200 as the device 100. This will be described later.

Referring to FIG. 3, the controller 110 of the first location tracking device 100 may determine whether the second location tracking device 200 is located within a preset distance (S305).

In detail, the first location tracking device 100 and the second location tracking device 200 have begun to operate due to a turn on or the like, and the distance between the first location tracking device 100 and the second location tracking device 200 is reduced. Is greater than or equal to a certain distance, the second location tracking device 200 operates as a transmitter.

in this case. The control unit 210 of the second location tracking device 200 may obtain information about the absolute location of the second location tracking device 200 and transmit the information to the first location tracking device 100, and the first location tracking device ( The control unit 110 of the 100 tracks the first position tracking device 100 and the second position tracking based on the information about the absolute position of the first position tracking device 100 and the absolute position of the second position tracking device 200. Information about the distance between the devices 200 may be obtained, and it may be determined whether the second location tracking device 200 is located within a preset distance based on the obtained information.

In addition, the first position tracking device 100 and the second position tracking device 200 has started to operate due to the turn on, etc., and the distance between the first position tracking device 100 and the second position tracking device 200 When within a certain distance, the second location tracking device 200 operates as a receiver.

In this case, the control unit 110 of the first location tracking device 100 may receive location information from the second location tracking device 200, and the control unit 110 of the first location tracking device 100 may receive a second location. By using the location information of the location tracking device 200. Information about a relative position of the second location tracking device 200 based on the first location tracking device 100 may be obtained.

In addition, the controller 110 obtains information on the distance between the first location tracking device 100 and the second location tracking device 200 based on the information on the relative position of the second location tracking device 200, Based on the obtained information, it may be determined whether the second location tracking device 200 is located within a preset distance.

Meanwhile, when the distance from the second location tracking device 200 is greater than or equal to the preset distance, the controller 110 may include one or more

wearable receivers

151, 152, 251, and 252 and one or more

fixed receivers

51, 52, 53, and 54. ) And the first location tracking device 100 may be operated as a transmitter to obtain location information of at least one of the location tracking device 200 and the second location tracking device 200 (S310).

Here, "operating as a transmitter" means a state in which the transmitter emits an electromagnetic field by controlling the transmitter by the control unit to obtain position information.

On the other hand, when the transmitter 130 of the first position tracking device 100 emits an electromagnetic field, the transmitter 130 of the first position tracking device 100 of the one or more fixed receivers (51, 52, 53, 54) At least one stationary receiver that detects the emitted electromagnetic field may transmit its own location information to the first location tracking device 100.

The control unit 110 of the first location tracking apparatus 100 may receive the location information of the at least one fixed receiver from the at least one fixed receiver through the communication unit 120 (S315).

Meanwhile, the controller 110 of the first location tracking apparatus 100 may obtain information on the absolute position of the first location tracking apparatus 100 based on the received location information of the at least one fixed receiver ( S320).

Meanwhile, when the transmitter 130 of the first location tracking device 100 emits an electromagnetic field, the one or more

wearable receivers

151 and 152 mounted by the first user may transmit the transmitter 130 of the first location tracking device 100. ) Detects an electromagnetic field emitted and transmits its own location information to the first location tracking device 100.

In this case, the controller 110 of the first location tracking apparatus 100 may receive the location information of each of the one or more

wearable receivers

151 and 152 through the communication unit 120 from each of the one or more

wearable receivers

151 and 152. There is (S325).

On the other hand, the control unit 110 of the first location tracking device 100, based on the received position information of each of the one or more wearable receivers (151, 152), the opponent of each of the one or more wearable receivers (151, 152) Information on the location may be obtained (S330).

In addition, the control unit 110 of the first location tracking device 100, based on the information on the relative position of each of the one or more wearable receivers (151, 152) and the absolute position of the first location tracking device (100). Thus, information on the absolute position of each of the one or more

wearable receivers

151 and 152 may be obtained.

On the other hand, when the distance from the second position tracking device 200 is greater than or equal to the predetermined distance, the second position tracking device 200 receives a transmitter operation command from the first position tracking device 100 to operate as a transmitter. to be.

In addition, when the distance from the second location tracking device 200 is greater than or equal to the preset distance, the control unit 210 of the second location tracking device 200 obtains information on the absolute position of the second location tracking device 200. To the first location tracking device 100.

In this case, the control unit 110 of the first location tracking device 100 may receive information on the absolute position of the second location tracking device 200 from the second location tracking device 200 through the communication unit 120. There is (S335).

In addition, the control unit 110 of the first location tracking device 100 by using the information about the absolute location of the first location tracking device 100 and the absolute location of the second location tracking device 100, Information about the distance between the first location tracking device 100 and the second location tracking device 200 may be obtained.

In addition, when the first location tracking device 100 and the second location tracking device 200 approaches and the distance between the first location tracking device 100 and the second location tracking device 200 is within a predetermined distance, The controller 110 of the first location tracking device 100 may transmit a receiver operation command to the second location tracking device 200 to operate the second location tracking device 200 as a receiver (S340).

Here, "operating as a receiver" means that the transmitter does not emit an electromagnetic field and transmits its location information to an external device when an electromagnetic field emitted from an external device is detected.

In addition, the "receiver operation command" means a control command for causing the second position tracking device 200 that used to operate as a transmitter to operate as a receiver. That is, the "receiver operation command" is a control for causing the second location tracking device 200 to stop the emission of the electromagnetic field and transmit the location information of the second location tracking device 200 to the first location tracking device 100. It may be a command.

On the other hand, when the first location tracking device 100 and the second location tracking device 200 starts to operate, the control unit 110 of the first location tracking device 100 is configured by the second location tracking device 200. In operation S305, when the second location tracking device 200 is located within a preset distance, the controller 110 of the first location tracking device 100 may determine one or more wearable receivers 151,. 152, 251, 252, one or more

fixed receivers

51, 52, 53, 54 and the second position tracking device 200 to obtain position information of the first position tracking device 100 as a transmitter. It can be operated (S345).

That is, the first location tracking device 100 may operate as a transmitter regardless of the distance to the second location tracking device 200.

On the other hand, when the transmitter 130 of the first position tracking device 100 emits an electromagnetic field, the transmitter 130 of the first position tracking device 100 of the one or more fixed receivers (51, 52, 53, 54) The at least one fixed receiver that detects the emitted electromagnetic field may transmit its own location information to the first location tracking device 100.

In addition, the control unit 110 of the first location tracking apparatus 100 may receive the location information of the at least one fixed receiver through the communication unit 120 from the at least one fixed receiver (S350).

Meanwhile, the controller 110 of the first location tracking apparatus 100 may obtain information on the absolute position of the first location tracking apparatus 100 based on the received location information of the at least one fixed receiver ( S355).

Meanwhile, when the transmitter 130 of the first location tracking device 100 emits an electromagnetic field, one or more

wearable receivers

151 and 152 worn by the first user and one or more wearable receivers 251 worn by the second user. At least one of the second position tracking device 200 and the second position tracking device 200 detects an electromagnetic field emitted by the transmitter 130 of the first position tracking device 100, and records its own position information. Can be sent to.

In this case, the control unit 110 of the first location tracking device 100 communicates the location information of each of the one or more

wearable receivers

151, 152, 251, and 252 with each other. The location information of the second location tracking device 200 may be received from the second location tracking device 200 through the communication unit 120 (S360).

On the other hand, the control unit 110 of the first location tracking device 100 is relative to the one or more wearable receivers (151, 152, 251, 252), the absolute position of the one or more wearable receivers (151, 152, 251, 252), Information about at least one of the relative position of the second position tracking device 200 and the absolute position of the second position tracking device 200 may be obtained (S365).

Specifically, the control unit 110 of the first location tracking device 100, based on the received position information of each of the one or more wearable receivers (151, 152, 251, 252), one or more wearable receivers (151, 152, 251 and 252 may obtain information about each relative position.

In this case, the control unit 110 of the first location tracking device 100, the information about the absolute position of the first location tracking device 100 and the relative position of each of the one or more wearable receivers (151, 152, 251, 252). Based on the information on the absolute position of each of the one or more wearable receivers (151, 152, 251, 252) can be obtained.

In addition, the control unit 110 of the first location tracking device 100, based on the received location information of the second location tracking device 200, obtains information about the relative position of the second location tracking device 200. can do.

In this case, the control unit 110 of the first position tracking device 100 is based on the information about the absolute position of the first position tracking device 100 and the relative position of the second position tracking device 200. Information about the absolute position of the location tracking device 200 may be obtained.

On the other hand, when the second location tracking device 200 is located within a predetermined distance from the first location tracking device 100, the second location tracking device 200 is operating as a receiver.

In addition, when the second location tracking device 200 is located within a predetermined distance, the first location tracking device 100 is in a state of obtaining information on the relative position of the second location tracking device 200.

In this case, the controller 110 of the first location tracking device 100 may use the first location tracking device 100 and the second location tracking device by using information about the relative location of the location tracking device 200. It is possible to obtain information about the distance between the 200.

In addition, when the first location tracking device 100 and the second location tracking device 200 are far from each other and the distance between the first location tracking device 100 and the second location tracking device 200 becomes greater than or equal to a preset distance, The control unit 110 of the first location tracking device 100 may transmit a transmitter operation command to the second location tracking device 200 in order to operate the second location tracking device 200 as a transmitter (S370).

Here, the "transmitter operation command" means a control command for the second position tracking device 200 operating as a receiver to operate as a transmitter. That is, the "transmitter operation command" may be a control command for causing the second position tracking device 200 to emit an electromagnetic field.

Referring to FIG. 4, the controller 210 of the second location tracking device 200 may obtain information about whether the second location tracking device 200 is located within a preset distance (S405).

Specifically, when the second location tracking device 200 starts tracking the location, the controller 210 may control the second location tracking device 200 to operate as a receiver.

Meanwhile, when the distance between the first location tracking device 100 and the second location tracking device 200 is within a specific distance, the receiver 240 of the second location tracking device 200 is the first location tracking device 100. Sensing the electromagnetic field emitted from the control unit, the control unit 210 of the second location tracking device 200 may transmit the location information of the second location tracking device 200 to the first location tracking device 100.

Meanwhile, the first location tracking device 100 may use the location information received from the second location tracking device 200 to provide information about the distance between the first location tracking device 100 and the second location tracking device 200. The first location tracking device 200 may transfer the obtained information to the second location tracking device 100. In this case, the control unit 210 of the second location tracking device 200 may determine that the distance to the first location tracking device 100 is within a preset distance.

Meanwhile, although the second location tracking device 200 has started to operate and operates as a receiver, the second location tracking device 200 is discharged from the first location tracking device 100 because the distance between the first location tracking device 100 and the second location tracking device 200 is far. If the electromagnetic field does not reach the second location tracking device 200, the first location tracking device 100 obtains information on the distance between the first location tracking device 100 and the second location tracking device 200. In this case, the second location tracking device 200 may also receive any information. In this case, the control unit 210 of the second location tracking device 200 may determine that the distance to the first location tracking device 100 is greater than or equal to a preset distance.

In addition, even if the electromagnetic field emitted from the first location tracking device 100 reaches the second location tracking device 200, the distance between the second location tracking device 200 and the first location tracking device 100 is preset. When it is calculated to be within the distance, the controller 210 of the second location tracking device 200 may determine that the distance to the first location tracking device 100 is greater than or equal to a preset distance.

Meanwhile, when the distance between the first location tracking device 100 and the second location tracking device 200 is greater than or equal to a preset distance, the control unit 210 of the second location tracking device 200 may include one or more

fixed receivers

51 and 52. , 53, 54 and the second location tracking device 200 may be operated as a transmitter in order to obtain location information of at least one of the

wearable receivers

251 and 252 worn by the second user (S410).

On the other hand, when the transmitter 230 of the second position tracking device 200 emits an electromagnetic field, the transmitter 230 of the second position tracking device 200 of the one or more fixed receivers (51, 52, 53, 54) The at least one fixed receiver that detects the emitted electromagnetic field may transmit its own location information to the second location tracking device 200.

The controller 210 of the second location tracking apparatus 200 may receive the location information of the at least one fixed receiver from the at least one fixed receiver through the communication unit 220 (S415).

Meanwhile, the controller 210 of the second location tracking apparatus 200 may obtain information on the absolute position of the second location tracking apparatus 200 based on the received location information of the at least one fixed receiver ( S420).

Meanwhile, when the transmitter 230 of the second location tracking device 200 emits an electromagnetic field, the one or more

wearable receivers

251 and 252 mounted by the second user may transmit the transmitter 230 of the second location tracking device 200. ) Detects an electromagnetic field emitted and transmits its own location information to the second location tracking device 200.

In this case, the controller 210 of the second location tracking apparatus 200 may receive the location information of each of the one or more

wearable receivers

251 and 252 from the one or more

wearable receivers

251 and 252 through the communication unit 120. There is (S425).

On the other hand, the control unit 210 of the second location tracking device 200, based on the received position information of each of the at least one wearable receiver (251, 252), the relative position of each of the at least one wearable receiver (251, 252). Information may be obtained (S430).

In addition, the control unit 210 of the second location tracking device 200 is based on the information on the relative position of each of the one or more

wearable receivers

251, 252 and the absolute location of the first location tracking device 200. Thus, information on the absolute position of each of the one or more

wearable receivers

251 and 252 may be obtained.

Meanwhile, when a receiver operation command for operating the second location tracking device 200 as a receiver is received from the first location tracking device 100, the control unit 210 of the second location tracking device 200 controls the second location tracking. The device 200 may be controlled to operate as a receiver (S435). Specifically, the control unit 210 of the second position tracking device 200 stops the emission of the electromagnetic field, the receiver 240 may detect the electromagnetic field emitted from the first position tracking device 100, the control unit 210 ) May transmit location information of the second location tracking device 200 obtained based on the detected electromagnetic field to the first location tracking device 100.

Meanwhile, when the distance between the first location tracking device 100 and the second location tracking device 200 is within a preset distance, the controller 210 of the second location tracking device 200 may operate as a receiver ( S440).

That is, the control unit 210 of the second position tracking device 200 may not emit an electromagnetic field. In addition, the receiver 240 may detect an electromagnetic field emitted from the first location tracking device 100, and the controller 210 may acquire location information of the second location tracking device 200 obtained based on the detected electromagnetic field. May be transmitted to the first location tracking device 100.

The position tracking system using the electromagnetic field, the transmitter emits an electromagnetic field, the receiver detects the electromagnetic field, and transmits the position information obtained based on the detected electromagnetic field to the transmitter, the transmitter uses the received position information relative to the receiver The location is determined. That is, the position tracking system using the electromagnetic field is a system for tracking the user's movement by tracking the position of the receiver.

In this case, there is a method of fixing the transmitter at a specific external location and tracking the user's movement by wearing the receiver.

However, since the user experiences virtual reality while moving, the distance from the transmitter may be increased. As such, even when the distance between the user and the transmitter is far, it is necessary to emit a strong intensity electromagnetic field in order to determine the position or operation of the user. Increasing the intensity of the electromagnetic field may be harmful to the human body.

In addition, as shown in FIG. 5, there is also a method in which the first wearable device 510 itself operates as a position tracking device. In this case, since the distance between the first wearable device 510 worn by the first user and the

receivers

521 and 522 worn by the first user is short, the receiver may be worn by the first user even if the strength of the electromagnetic field is reduced. Location can be identified.

However, when the first user and the second user exist in a specific space, the first wearable device 510 worn by the first user may not only receive the

receivers

521 and 522 worn by the first user, but also the second user. The positions of the

worn receivers

621 and 622 and the second wearable device 610 operating as the receiver should be determined.

However, since both the first user and the second user are movable, the distance between the first user and the second user may be far from each other, and the first wearable device 510 may be a receiver worn by the second user using an electromagnetic field. 621 and 622, and the electromagnetic field of a strong intensity must be emitted in order to locate the second wearable device 610 operating as a receiver. Therefore, even in this case, there remains a problem that may cause harm to the human body due to the electromagnetic field.

On the other hand, in order to overcome the problem of harm to the human body, as shown in FIG. 6, both the first wearable device 510 worn by the first user and the second wearable device 610 worn by the second user are transmitters. May be considered.

In this case, the first wearable device 510 worn by the first user only needs to emit an electromagnetic field capable of detecting the

receivers

521 and 522 worn by the first user, and the second wearable by the second user. Since the wearable device 610 only needs to emit an electromagnetic field capable of detecting the

receivers

621 and 622 worn by the first user, the hazard problem according to the strength of the electromagnetic field may be overcome.

However, as shown in FIG. 6, when the first user and the second user approach each other, the electromagnetic field emitted by the first wearable device 510 worn by the first user and the second worn by the second user Interference between electromagnetic fields emitted by the wearable device 610 may be generated, which may reduce recognition accuracy or make the recognition itself impossible.

In addition, a method of varying the frequency of the electromagnetic field may be considered in order to prevent interference between the electromagnetic fields, but in order to do this, the product producer has to produce the electromagnetic field emitted by each wearable device at a different frequency. It will be disadvantageous.

In addition, compared to the case in which the transmitter is mounted at a fixed position, when the first wearable device 510 itself operates as a transmitter, the first wearable device 510 worn by the first user and the first user wear Since the distances of the

receivers

521 and 522 are short, it has been described that the position of the receiver worn by the first user can be determined even if the strength of the electromagnetic field is weakened.

That is, when the first user alone exists in a specific space, the problem of harmfulness according to the strength of the electromagnetic field may be overcome to some extent.

However, in this case, since both the first wearable device 510 worn by the first user and the

receivers

521 and 522 worn by the first user may move, the receiver based on the first wearable device 510 ( Only the relative positions of the 521 and 522 may be determined, but the absolute position of the first wearable device 510 may not be determined.

When the first user and the second user start using the HEAD MOUNTED DISPLAY (HMD) device, such as by turning on each HEAD MOUNTED DISPLAY (HMD) device, the first location tracking device 100 and the second user. The location tracking device 200 may also start operation.

Specifically, the first location tracking device 100 is a host, the second location tracking device 200 is set to operate as a client, the location tracking device 100 and the location of the second user of the first user When the tracking device 200 starts to operate, the control unit 110 of the first location tracking device 100 may operate the first location tracking device 100 as a transmitter, and the second location tracking device 200. The control unit 210 may operate the second location tracking device 200 as a receiver. That is, the transmitter 130 of the first location tracking device 100 emits an electromagnetic field, and the transmitter 230 of the second location tracking device 200 does not emit an electromagnetic field.

Meanwhile, in FIG. 7, a situation in which electromagnetic fields emitted from the first location tracking device 100 may be detected by the second location tracking device 200, that is, the first location tracking device 100 and the second location tracking. Describe the situation where the devices 200 are close to each other.

On the other hand, as shown in FIG. 7, when the distance between the first location tracking device 100 and the second location tracking device 200 is within a specific distance, the receiver 240 of the second location tracking device 200 is The first position tracking device 100 may detect the electromagnetic field emitted.

On the other hand, when the electromagnetic field emitted from the first location tracking device 100 is detected, the receiver 240 of the second location tracking device 200 based on the detected electromagnetic field location information of the second location tracking device 200 Can be obtained.

Meanwhile, the controller 210 may transmit location information of the second location tracking device 200 to the first location tracking device 100, and the first location tracking device 100 may be transferred from the second location tracking device 200. Information on the distance between the first location tracking device 100 and the second location tracking device 200 may be obtained using the received location information.

In this case, the control unit 110 of the first location tracking device 100 transmits information on the distance between the first location tracking device 100 and the second location tracking device 200 to the second location tracking device 200. Can be. In this case, the control unit of the second location tracking device 200 is based on the information on the distance between the first location tracking device 100 and the second location tracking device 200 and the first location tracking device 100 and the second. The distance between the location tracking device 200 may be determined to be within a preset distance, and when the distance between the first location tracking device 100 and the second location tracking device 200 is within a predetermined distance, the second location tracking is performed. If the device 200 continues to operate as a receiver and the distance between the first location tracking device 100 and the second location tracking device 200 is greater than or equal to a preset distance, the second location tracking device 200 can be operated as a transmitter. Can be.

Meanwhile, in the above embodiment, the first location tracking device 100 transmits information about the distance between the first location tracking device 100 and the second location tracking device 200 to the second location tracking device 200. Although described, it is not limited thereto.

For example, the control unit 110 of the first location tracking device 100 is based on the information on the distance between the first location tracking device 100 and the second location tracking device 200, the first location tracking device ( It may be determined whether the distance between the 100 and the second location tracking device 200 is within a preset distance. In addition, when the distance between the first location tracking device 100 and the second location tracking device 200 is within a predetermined distance, the control unit 110 of the first location tracking device 100 is the second location tracking device 200. The second position tracking device 200 may continuously operate as a receiver by not transmitting a control signal. In addition, when the distance between the first location tracking device 100 and the second location tracking device 200 is greater than or equal to a preset distance, the control unit 110 of the first location tracking device 100 is the second location tracking device 200. The second position tracking device 200 may be operated as a transmitter by transmitting a transmitter operation command to the transmitter.

In addition, the information on the distance between the first location tracking device 100 and the second location tracking device 200 uses the location information transmitted from the second location tracking device 200 to the first location tracking device 100. It may be obtained by.

Before, when the electromagnetic field emitted from the first location tracking device 100 is detected, the control unit 210 of the second location tracking device 200 is based on the detected electromagnetic field location information of the second location tracking device 200. It was described as acquiring.

Here, the position information of the second position tracking device 200 may include three-axis position coordinates and three-axis direction coordinates of the second position tracking device 200 based on the first position tracking device 100.

In addition, the controller 210 of the second location tracking device 200 is configured between the first location tracking device 100 and the second location tracking device 200 based on the three-axis position coordinates of the second location tracking device 200. Information about the distance can be obtained.

In addition, the control unit 210 of the second location tracking device 200 is based on the information on the distance between the first location tracking device 100 and the second location tracking device 200, the first location tracking device 100 If the distance between the second position tracking device 200 and the predetermined distance within the predetermined distance to operate the second position tracking device 200 as a receiver, the first position tracking device 100 and the second position tracking device 200 If the distance is greater than or equal to a predetermined distance, the second location tracking device 200 may be operated as a transmitter.

Meanwhile, in FIG. 8, a situation in which the electromagnetic field emitted from the first location tracking device 100 cannot be detected by the second location tracking device 200, that is, the first location tracking device 100 and the second location tracking. A situation in which the devices 200 are far from each other is described.

On the other hand, when the distance between the first location tracking device 100 and the second location tracking device 200 is far from the electromagnetic field emitted from the first location tracking device 100 does not reach the second location tracking device, The first location tracking device 100 may not obtain information about the distance between the first location tracking device 100 and the second location tracking device 200, and in this case, the second location tracking device 200 may also have no information. Cannot be obtained.

Specifically, since the second location tracking device 200 cannot detect the electromagnetic field emitted from the first location tracking device 100, the second location tracking device 200 may not acquire location information of the second location tracking device 200. In addition, the first location tracking device 100 also obtains information about a distance between the first location tracking device 100 and the second location tracking device 200 or a transmitter operation command and transmits the information to the second location tracking device 200. Can not.

Accordingly, although the second position tracking device 200 is turned on and is operating as a receiver, the second position tracking device 200 cannot detect the electromagnetic field emitted from the first location tracking device 100, so that the distance to the first location tracking device 100 may be determined. When information that can be obtained (information about the distance between the first location tracking device 100 and the second location tracking device 200, transmitter operation command, location information of the second location tracking device 200, etc.) The controller 210 of the second location tracking device 200 may control the second location tracking device 200 operating as a receiver to operate as a transmitter. In this case, the controller 210 of the second location tracking device 200 may control the transmitter 230 to emit an electromagnetic field.

Meanwhile, a method in which the second location tracking device 200 can operate as a transmitter using more accurate information will be described. That is, in the above, when the information for determining the distance to the first location tracking device 100 cannot be obtained, the second location tracking device 200 operates as a transmitter, but using the following method By determining the distance between the first position tracking device 100 and the second position tracking device 200 more accurately, it can operate as a transmitter during the first operation.

The second fixed receiver 52 that detects the electromagnetic field emitted from the first location tracking device 100 may transmit the location information of the second fixed receiver 52 to the first location tracking device 100. In this case, the controller 110 of the first location tracking apparatus 100 may obtain information about the absolute position of the first location tracking apparatus 100 using the location information of the second fixed receiver 52.

In addition, the fourth fixed receiver 54 that detects the electromagnetic field emitted from the second location tracking device 200 may transmit the location information of the fourth fixed receiver 54 to the second location tracking device 200. In this case, the controller 210 of the second location tracking apparatus 200 may obtain information about the absolute location of the first location tracking apparatus 100 using the location information of the second fixed receiver 52.

Also, the first location tracking device 100 and the second location tracking device 200 may provide information about the absolute location of the first location tracking device 100 and the information about the absolute location of the second location tracking device 200. Can share

Meanwhile, the control unit 110 of the first location tracking device 100 or the control unit 210 of the second location tracking device 200 may provide information on the absolute position of the first location tracking device 100 and the second location tracking device. The distance between the first location tracking device 100 and the second location tracking device 200 may be determined based on the information about the absolute location of the 200.

The second location tracking device 200 is a transmitter when the distance between the first location tracking device 100 and the second location tracking device 200 is greater than or equal to a preset distance, and the first location tracking device 100 and the first location tracking device 100 are located. If the distance between the two position tracking device 200 is within a predetermined distance may operate as a receiver.

As described above, according to the present invention, when the first position tracking device 100 and the second position tracking device 200 are turned on at the same time or the first position tracking device 100 is turned on, the second position tracking device is turned on. Even when 200 is turned on, the first operation state of the second location tracking apparatus 200 may be determined based on the method described with reference to FIGS. 7 to 8.

7 to 8 illustrate that the first location tracking device 100 is a host and the second location tracking device 200 is a client, the present invention is not limited thereto.

Specifically, the first turned on device 100 and the second location tracker 200 may be implemented in such a manner that the first turned on device is a host and the later turned on device operates as a client. In this case, the second location tracking device 100 may include a receiver 140.

For example, when the second location tracking device 200 first starts to operate, the second location tracking device 200 may operate as a transmitter as a host. In addition, when the first location tracking device 100 starts to operate while the second location tracking device 200 operates as a transmitter, the second location tracking device 200 and the first location tracking device 100 The second location tracking device 200 may share information indicating that the host, and in this case, the first location tracking device 200 may start an operation as a receiver as a client. Subsequent processes are as described with reference to FIGS. 7 to 8.

In addition, although FIG. 7 to FIG. 8 illustrate that the first location tracking device 100 as a host operates as a transmitter and the second location tracking device 200 as a client operates as a receiver during an initial operation, the present invention is not limited thereto.

In detail, the first location tracking device 100 as a host and the second location tracking device 200 as a client may alternately operate as a transmitter or a receiver. For example, when both the first location tracking device 100 and the second location tracking device 200 start to operate, a synchronization signal is shared between the first location tracking device 100 and the second location tracking device 200. Accordingly, when the first location tracking device 100 operates as a transmitter, when the second location tracking device 200 operates as a receiver and the first location tracking device 100 operates as a receiver. The second position tracking device 200 may repeat the operation of the transmitter.

In this case, when the first location tracking device 100 and the second location tracking device 200 are close, the control unit 210 of the second location tracking device 200 may determine the location information of the first location tracking device 100. The distance to the first location tracking apparatus 100 may be determined by using the same.

In addition, when the first location tracking device 100 and the second location tracking device 200 are far apart, the control unit 210 of the second location tracking device 200 may determine the absolute position and the first location of the second location tracking device 200. The distance to the first location tracking device 100 may be determined using the information on the absolute location of the first location tracking device 100.

The controller 210 of the second location tracking device 200 may operate the second location tracking device 200 as a transmitter or as a receiver based on the distance from the first location tracking device 100. .

Meanwhile, the operation after the operation state of the second location tracking device 200 is determined after the second location tracking device 200 is turned on will be described.

Hereinafter, the second location tracking device 200 will be described as first operating as a transmitter, but is not limited thereto. When the distance between the first location tracking device 100 and the second location tracking device 100 is close, the second location tracking device 200 is operated. The location tracking device 200 may operate as a receiver.

9 is a diagram for describing an operation method when the distance between the first location tracking device and the second location tracking device is greater than or equal to a preset distance according to an embodiment of the present invention.

According to FIG. 9, the first location tracking device 100 may operate as a transmitter. Specifically, the control unit 110 of the first position tracking device 100 controls the transmitter to emit an electromagnetic field, and the transmitter 130 of the first position tracking device 100 controls the electromagnetic field under the control of the control unit 110. Can be released.

In addition, since the second location tracking device 200 is determined to operate as a transmitter, the second location tracking device 200 may operate as a transmitter. Specifically, the controller 210 of the second location tracking device 200 controls the transmitter to emit an electromagnetic field, and the transmitter 230 of the second location tracking device 200 controls the electromagnetic field under the control of the controller 210. Can be released.

According to FIG. 10, at least one of the one or more

fixed receivers

51, 52, 53, and 54 may detect the electromagnetic field 1012 emitted from the first position tracking device 100.

In addition, when the electromagnetic field emitted from the first position tracking device 100 is sensed, the fixed receiver 52 that detects the electromagnetic field emitted from the first position tracking device 100 is positional information 1011 of the fixed receiver 52. ) May be transmitted to the first location tracking apparatus 100.

In addition, at least one fixed receiver 54 of the one or more

fixed receivers

51, 52, 53, and 54 may sense the electromagnetic field 1062 emitted from the second position tracking device 200.

In addition, when the electromagnetic field emitted from the second position tracking device 200 is detected, the fixed receiver 54 that detects the electromagnetic field emitted from the second position tracking device 200 is located in the position information 1061 of the fixed receiver 54. ) May be transmitted to the second location tracking device 200.

On the other hand, the absolute position does not mean a position that is determined relatively in relation to the other position tracking device and the wearable receiver, but refers to a position that is determined absolutely irrespective of the other position tracking device and the wearable receiver. Meanwhile, the information about the absolute position may include coordinate information and direction information of the specific device.

On the other hand, when the position information 1011 is received from the fixed receiver 52 by the electromagnetic field being emitted, the control unit 110 of the first position tracking device 100 is based on the received position information 1011 of the fixed receiver 52. By doing so, information about an absolute position of the first location tracking apparatus 100 may be obtained.

Specifically, in the initial setting or calibration process of the one or more

fixed receivers

51, 52, 53, 54, the control unit 110 of the first position tracking device 100 may include one or more

fixed receivers

51, 52, It is possible to obtain information on the position and direction in which the 53 and 54 are fixed, or the positional relationship or orientation relationship between the one or more

fixed receivers

51, 52, 53, and 54, that is, setting information. In this case, the first location tracking apparatus 100 may include a storage unit (not shown) for storing setting information of one or more

fixed receivers

51, 52, 53, and 54.

On the other hand, when the position information 1011 of the fixed receiver 52 is received, the control unit 110 of the first position tracking device 100 is the setting information of the fixed receiver 52 and the position information 1011 of the fixed receiver 52. ) May be used to obtain information about the absolute position of the first location tracking device 100. That is, the control unit 110 of the first position tracking device 100 uses the setting information of the fixed receiver 52 and the coordinate information of the first position tracking device 100 using the position information 1011 of the fixed receiver 52. And direction information of the first location tracking apparatus 100.

Specifically, the control unit 110 of the first position tracking device 100 is relative to the fixed receiver 52 based on the first position tracking device 100 using the position information 1011 of the fixed receiver 52. Information about the location can be obtained. In addition, since the first position tracking device 100 has already obtained the information on the position and the direction in which the fixed receiver 52 is fixed, the information on the position where the fixed receiver 52 is fixed and the fixed receiver 52 Information about the absolute position of the first location tracking device 100 may be obtained based on the information on the relative location of the first location tracking apparatus 100.

On the other hand, the second location tracking device 200 may also obtain the setting information directly or in a manner of receiving from the first location tracking device 100.

In addition, when the positional information 1061 is received from the fixed receiver 54 by emitting an electromagnetic field, the control unit 210 of the second position tracking apparatus 200 is based on the received positional information 1061 of the fixed receiver 54. To obtain information about the absolute position of the second location tracking device 200. That is, the controller 210 of the second location tracking device 200 may obtain the coordinate information and the direction information of the second location tracking device 100.

Here, the relative position means a position determined relatively in relation to another position tracking device or a wearable receiver. In addition, the information on the relative position may include coordinate information and direction information of the specific device.

According to FIG. 11, when the electromagnetic field 1111 emitted from the first location tracking device 100 is detected, the first wearable receiver 151 that detects the electromagnetic field emitted from the first location tracking device 100 may be a first wearable. The location information 1112 of the receiver 151 may be transmitted to the first location tracking device 100.

In addition, when the electromagnetic field 1121 emitted from the first location tracking device 100 is detected, the second wearable receiver 152 that detects the electromagnetic field emitted from the first location tracking device 100 may have a second wearable receiver 152. Location information 1122 may be transmitted to the first location tracking apparatus 100.

Meanwhile, the controller 110 of the first location tracking apparatus 100 may obtain information about the relative position of the first wearable receiver 151 using the location information 1112 of the first wearable receiver 151. have. That is, information about the position and direction of the first wearable receiver 151 based on the first position tracking device 100 may be obtained.

In addition, the controller 110 of the first location tracking apparatus 100 may obtain information about the relative position of the second wearable receiver 152 using the location information 1122 of the second wearable receiver 152. have. That is, information about the position and direction of the second wearable receiver 152 based on the first position tracking apparatus 100 may be obtained.

Meanwhile, the controller 110 of the first location tracking apparatus 100 may be configured based on the information on the relative position of the first wearable receiver 151 and the information on the absolute position of the first location tracking apparatus 100. Information about the absolute position of the wearable receiver 151 may be obtained.

Specifically, the control unit 110 of the first location tracking device 100 has already obtained the information on the absolute position of the first location tracking device 100 by using the location information of the fixed receiver 52, The control unit 110 of the first location tracking device 100 is information about the absolute position of the first location tracking device 100 and the relative position of the first wearable receiver 151 based on the first location tracking device 100. Based on the information about the absolute position of the first wearable receiver 151 may be obtained. More specifically, the first wearable receiver 151 based on the absolute coordinate information of the first position tracking device 100 and the relative coordinate information based on the first position tracking device 100 of the first wearable receiver 151. Information about the absolute coordinates of the first position tracking apparatus 100, and based on the absolute direction information of the first position tracking device 100 and the relative direction information based on the first position tracking device 100 of the first wearable receiver 151. In this way, information about the absolute direction of the first wearable receiver 151 may be obtained.

In addition, the control unit 110 of the first location tracking device 100 is based on the information on the relative position of the second wearable receiver 152 and the absolute position of the first location tracking device 100 based on the second. Information about the absolute position of the wearable receiver 152 may be obtained.

The above-described operation may be applied to the second location tracking device 200 as it is.

In detail, when the electromagnetic field 1161 emitted from the second location tracking device 200 is detected, the third wearable receiver 251 that detects the electromagnetic field emitted from the second location tracking device 200 may include a second wearable receiver ( The location information 1162 of 251 may be transmitted to the second location tracking device 200.

In addition, when the electromagnetic field 1171 emitted from the second location tracking device 200 is detected, the fourth wearable receiver 252 that detects the electromagnetic field emitted from the second location tracking device 200 may have a fourth wearable receiver 252. Location information 1172 may be transmitted to the second location tracking device 200.

Meanwhile, the controller 210 of the second location tracking apparatus 200 may obtain information about the relative position of the third wearable receiver 251 using the location information 1162 of the third wearable receiver 251. Based on the information about the relative position of the third wearable receiver 251 and the information about the absolute position of the second position tracking device 200, the information about the absolute position of the third wearable receiver 251 may be obtained. .

In addition, the controller 210 of the second location tracking apparatus 200 may obtain information on the relative position of the fourth wearable receiver 252 using the location information 1172 of the fourth wearable receiver 252. The second wearable receiver 252 may obtain information about an absolute position of the fourth wearable receiver 252 based on the information about the relative position of the fourth wearable receiver 252 and the information about the absolute position of the second position tracking device 200. have.

Meanwhile, information about the location and operation of the first user and information about the location and operation of the second user may be transmitted to a server (not shown).

For example, the first location tracking device 100 communicates directly with a server (not shown) to provide information about the absolute location of the first location tracking device 100 and one or more wearable devices 151 mounted by the first user. , At least one of information about a relative position of the at least one 152 and information about an absolute position of at least one

wearable device

151 or 152 worn by the first user may be transmitted to a server (not shown). In addition, the second location tracking device 200 communicates directly with a server (not shown) to provide information about the absolute location of the second location tracking device 200, and at least one

wearable device

251 and 252 mounted by the second user. At least one of the information on the relative position of the) and the absolute position of the one or more

wearable devices

251 and 252 mounted by the second user may be transmitted to the server (not shown).

In addition, without the first location tracking device 100 and the second location tracking device 200 directly communicating with the server (not shown), the first location tracking device 100 and the second location tracking device 200 When the information on the above-described location is transmitted to at least one external host, the at least one host may be implemented by transmitting to a server (not shown).

In addition, when the second location tracking device 200 transmits the location or motion information of the second user to the first location tracking device 100, the first location tracking device 100 and the location or motion information of the first user It may also be implemented by transmitting the location or operation information of the second user to a server (not shown).

As described above, the present invention provides a receiver worn on a user's arm, leg, or the like by using a first position tracking device 100 worn by a user by directly wearing the first position tracking device 100 that operates as a transceiver. By locating the position of the user, there is an advantage that the user's motion can be detected only by emitting a small size electromagnetic field.

In addition, the present invention by placing a fixed receiver in the behavior range of the user wearing the first position tracking device 100 and using the fixed receiver to determine the absolute position of the user wearing the first location tracking device 100, In addition to the user's motion, the user's location in the virtual reality world may be identified and a virtual reality image corresponding thereto may be provided.

In particular, as the number of fixed receivers increases, it is possible to reduce the size of the electromagnetic field emitted by the first position tracking device 100 worn by the user, thereby identifying the absolute position of the user and detrimentally affecting the health of the user. There is an advantage that can be reduced.

On the other hand, the above-described effects of the first location tracking device 100 can be applied to the second location tracking device 200 as it is.

12 to 13 are diagrams illustrating a method of obtaining information on a distance between a first location tracking device and a second location tracking device according to an embodiment of the present invention.

First, the first location tracking device 100 is information on the absolute position of the first location tracking device 100, the second location tracking device 200 is information on the absolute position of the second location tracking device 200. As described above can be obtained.

In addition, the first location tracking device 100 and the second location tracking device 200 may share information on the absolute position of the first location tracking device 100 and the second location tracking device 200.

In detail, as described with reference to FIG. 12, the first location tracking apparatus 100 may transmit information 1291 about the first absolute position of the first location tracking apparatus 100 to the second location tracking apparatus 200. The second location tracking device 200 may transmit information 1292 about the first absolute location of the second location tracking device 200 to the first location tracking device 100.

In this case, the acquisition and transmission of the absolute position of each of the first location tracking device 100 and the second location tracking device 200 may be performed periodically or simultaneously by a synchronization signal.

In this case, the controller 110 of the first location tracking device 100 may include information about the first absolute location of the first location tracking device 100 and information about the first absolute location of the second location tracking device 200. By using, it is possible to obtain information about the distance between the first location tracking device 100 and the second location tracking device 200.

12, if the distance between the first location tracking device 100 and the second location tracking device 200 is greater than or equal to a preset distance, the controller 110 of the first location tracking device 100 is The transmitter operation command may be sent periodically or the receiver operation command may not be sent.

Meanwhile, “within a predetermined distance” may mean a distance at which interference may occur between an electromagnetic field emitted from the first location tracking device 100 and an electromagnetic field emitted from the second location tracking device 200.

In addition, the term “over a preset distance” may mean a distance at which interference does not occur between the electromagnetic field emitted from the first location tracking device 100 and the electromagnetic field emitted from the second location tracking device 200.

FIG. 13 is a diagram illustrating a state where the first user and the second user each change positions.

When the electromagnetic field 1311 emitted by the first position tracking device 100 is detected in a state where the position of the first user is changed, the first fixed receiver 51 determines the position information 1312 of the first fixed receiver 51. ) May be transmitted to the first location tracking apparatus 100.

In this case, the control unit 110 of the first position tracking device 100 receives information on the first absolute position of the first position tracking device 100 based on the position information 1312 of the first fixed receiver 51. Can be obtained.

In addition, when the position of the second user is changed, when the electromagnetic field 1331 emitted by the second position tracking device 200 is detected, the third fixed receiver 53 may provide position information of the third fixed receiver 53. 1136 may be transmitted to the second location tracking device 200.

In this case, the controller 210 of the second location tracking device 200 may obtain information on the first absolute position of the second location tracking device 200 based on the location information 1332 of the third fixed receiver 53. Can be obtained.

In addition, the controller 110 of the first location tracking device 100 may transmit information 1391 about the second absolute location of the first location tracking device 100 to the second location tracking device 200. The control unit 210 of the second location tracking device 200 may transmit the information 1332 of the second absolute location of the second location tracking device 200 to the first location tracking device 100.

On the other hand, the control unit 110 of the first location tracking device 100 is information on the second absolute position of the first location tracking device 100 and the information on the second absolute location of the second location tracking device 200. By using the first position tracking device 100 and the second position tracking device 200 can obtain information about the changed distance.

In addition, as shown in FIG. 13, when the distance between the first location tracking device 100 and the second location tracking device 200 is within a preset distance, the controller 110 of the first location tracking device 100 is The receiver operation command may be transmitted to the second location tracking apparatus 200.

Meanwhile, when a receiver operation command is received, the controller 210 of the second location tracking apparatus 200 may control the second location tracking apparatus 200 to operate as a receiver.

12 to 13 illustrate that the first location tracking apparatus 100 operates as a receiver by receiving a receiver operation command, but is not limited thereto.

For example, the controller 210 of the second location tracking device 200 obtains information on the distance between the first location tracking device 100 and the second location tracking device 200, and based on the obtained information. It can act as a receiver or as a transmitter.

In detail, as illustrated in FIG. 12, the control unit 210 of the second location tracking device 200 may receive information about the first absolute location 1292 of the first location tracking device 100. In addition, the control unit 210 of the second location tracking device 200 is based on the information about the first absolute location of the first location tracking device 100 and the second absolute location of the second location tracking device 200, Information about a distance between the first location tracking device 100 and the second location tracking device may be obtained.

Meanwhile, in FIG. 12, the distance between the first location tracking device 100 and the second location tracking device is greater than or equal to a preset distance. The control unit 210 of the second location tracking device 200 may have a second location tracking device 200. Can be controlled to keep operating as a transmitter.

As illustrated in FIG. 13, the control unit 210 of the second location tracking device 200 may receive information 1372 about the second absolute location of the first location tracking device 100. In addition, the control unit 210 of the second location tracking device 200 is based on the information about the first absolute location of the first location tracking device 100 and the second absolute location of the second location tracking device 200, Information about a distance between the first location tracking device 100 and the second location tracking device may be obtained.

Meanwhile, as shown in FIG. 13, since the distance between the first location tracking device 100 and the second location tracking device is within a preset distance, the control unit 210 of the second location tracking device 200 may have a second location. The tracking device 200 may be controlled to operate as a receiver.

Meanwhile, the receiver operation command has been described as being transmitted from the first location tracking device 100 to the second location tracking device 200, but is not limited thereto.

For example, as described above, one or more hosts may receive information about the absolute location of the first location tracking device 100 and the absolute location of the second location tracking device 200.

In this case, the one or more hosts may be connected to the first location tracking device 100 by using information about the first absolute location of the first location tracking device 100 and the first absolute location of the second location tracking device 200. Information about the distance between the second location tracking apparatus 200 may be obtained.

In addition, when the distance between the first location tracking device 100 and the second location tracking device 200 is greater than or equal to a predetermined distance, at least one host periodically transmits a transmitter operation command to the second location tracking device 200, The receiver operation command may not be transmitted.

Meanwhile, when information on the second absolute position of the first location tracking device 100 and the second absolute location of the second location tracking device 200 is received, the one or more hosts may be configured as the first location tracking device 100. 2 Information about the distance between the first location tracking device 100 and the second location tracking device 200 can be obtained by using the information about the absolute location and the second absolute location of the second location tracking device 200. have.

In addition, when the distance between the first location tracking device 100 and the second location tracking device 200 is within a predetermined distance, one or more hosts may transmit a receiver operation command to the second location tracking device 200.

The controller 110 of the first location tracking device 100 may operate the first location tracking device 100 as a transmitter regardless of the distance between the first location tracking device 100 and the second location tracking device 200. Can be. That is, the transmitter 130 of the first position tracking device 100 may emit an electromagnetic field under the control of the controller 110.

Meanwhile, when the distance between the first location tracking device 100 and the second location tracking device 200 is within a preset distance, the controller 210 of the second location tracking device 200 controls the second location tracking device 200. Can be controlled to operate as a receiver.

That is, the controller 210 of the second location tracking device 200 may control the transmitter 230 to stop the emission of the electromagnetic field. In addition, the receiver 240 of the second location tracking device 200 may detect the electromagnetic field emitted from the first location tracking device 100, and the controller 210 of the second location tracking device 200 may detect the detected field. The location information of the second location tracking device 200 obtained based on the electromagnetic field may be transmitted to the first location tracking device 100.

The absolute position determination method of the first position tracking device when the distance between the first position tracking device 100 and the second position tracking device 200 is within a preset distance is the first position tracking device 100 and the second position. It is the same as the absolute position determination method of the first position tracking device when the distance between the position tracking devices 200 is greater than or equal to a preset distance.

That is, at least one fixed receiver of the one or

more receivers

51, 52, 53, 54 (the first fixed receiver 51 in FIG. 15) senses the electromagnetic field 1511 emitted from the first position tracking device 100. can do.

Meanwhile, the first fixed receiver 51 that detects the electromagnetic field 1511 emitted from the first location tracking device 100 may transmit the location information of the first fixed receiver 51 to the first location tracking device 100. The controller 110 of the first location tracking apparatus 100 may obtain information about the absolute location of the first location tracking apparatus 100 using the location information of the first fixed receiver 51.

According to FIG. 16, when an electromagnetic field emitted from the first position tracking device 100 is detected, the first wearable receiver 151 worn by the first user may remove the position information 1612 of the first wearable receiver 151. 1 can be transmitted to the location tracking device (100).

In addition, when the electromagnetic field emitted from the first location tracking device 100 is sensed, the second wearable receiver 152 worn by the first user may track the location information 1622 of the second wearable receiver 152 at the first location. May transmit to the device 100.

Meanwhile, the controller 110 of the first location tracking apparatus 100 may obtain information about the relative position of the first wearable receiver 151 using the location information 1612 of the first wearable receiver 151. have.

In addition, the controller 110 of the first location tracking apparatus 100 may obtain information about the relative position of the second wearable receiver 152 using the location information 1622 of the second wearable receiver 152. have.

In addition, the control unit 110 of the first location tracking device 100 is a first user using information on the relative position of the first wearable receiver 151 and information on the absolute location of the first location tracking device 100. Information about an absolute position of the first wearable receiver 151 worn by the user may be obtained.

In addition, the control unit 110 of the first location tracking device 100 is a first user by using information about the relative position of the second wearable receiver 152 and information about the absolute location of the first location tracking device 100. Information about an absolute position of the second wearable receiver 152 worn by the user may be obtained.

Meanwhile, when the distance between the first location tracking device 100 and the second location tracking device 200 is greater than or equal to a preset distance, the at least one

wearable receiver

251 or 252 worn by the second user may be a second location tracking device. It has been described as transmitting the location information to 200.

However, when the distance between the first location tracking device 100 and the second location tracking device 200 is within a preset distance, the second location tracking device 200 does not emit an electromagnetic field and is worn by the second user. One or more

wearable receivers

251 and 252 transmit location information to the first location tracking device 100.

Specifically, when the electromagnetic field emitted from the first location tracking device 100 is sensed, the third wearable receiver 251 worn by the second user stores the location information 1701 of the third wearable receiver 251 in the first location. May be transmitted to the tracking device 100.

In addition, when the electromagnetic field emitted from the first location tracking device 100 is detected, the fourth wearable receiver 252 worn by the second user may track the location information 1672 of the fourth wearable receiver 252 to the first location tracking. May transmit to the device 100.

Meanwhile, the controller 110 of the first location tracking apparatus 100 may obtain information about the relative position of the third wearable receiver 251 using the location information 1671 of the third wearable receiver 251. have.

In addition, the controller 110 of the first location tracking apparatus 100 may obtain information about the relative position of the fourth wearable receiver 252 using the position information 1672 of the fourth wearable receiver 252. have.

In addition, the control unit 110 of the first location tracking device 100 is a second user by using information about the relative position of the third wearable receiver 251 and information about the absolute location of the first location tracking device 100. Information about the absolute position of the third wearable receiver 251 worn by the user may be obtained.

In addition, the control unit 110 of the first location tracking device 100 is a second user by using the information on the relative position of the fourth wearable receiver 252 and the absolute location of the first location tracking device 100. Information about the absolute position of the fourth wearable receiver 252 worn by the user may be obtained.

Meanwhile, the receiver 240 of the second location tracking device 200 may include a three-axis coil, and may detect an electromagnetic field emitted from the first location tracking device 100. In addition, the controller 210 of the second location tracking device 200 may obtain location information of the second location tracking device 200 based on the detected electromagnetic field. Here, the position information of the second position tracking device 200 may include three-axis position coordinates and three-axis direction coordinates of the second position tracking device 200 based on the first position tracking device 100.

Meanwhile, when the location information of the second location tracking device 200 is obtained, the controller 210 of the second location tracking device 200 may obtain the location information of the second location tracking device 200 from the first location tracking device. 100 can be sent.

Meanwhile, the control unit 110 of the first location tracking device 100 uses the location information of the second location tracking device 200 as a reference to the second location tracking device 200 based on the first location tracking device 100. Information about the relative position of the can be obtained.

In addition, the control unit 110 of the first location tracking device 100 is based on the information on the relative position of the second location tracking device 200 and the information on the absolute position of the first location tracking device 100, 2 may obtain information about the absolute position of the location tracking device 200.

Meanwhile, information about the location and operation of the first user and information about the location and operation of the second user may be transmitted to a server (not shown) or an external host.

In detail, the control unit 110 of the first location tracking device 100 may include information about an absolute position of the first location tracking device 100, information about a relative location of the second location tracking device 200, and a second location. Information about the absolute position of the tracking device 200, information about the relative position of the one or more

wearable devices

151 and 152 worn by the first user, and information about the one or more

wearable devices

151 and 152 worn by the first user. Among the information about the absolute position, the information about the relative position of the at least one wearable device (251, 252) worn by the second user, the information about the absolute position of the at least one wearable device (251, 252) worn by the second user At least one may be transmitted to a server (not shown) or an external host.

Meanwhile, the server (not shown) may obtain information about the location and operation of the first user and the location and operation of the second user based on the received information.

Specifically, the server (not shown) may obtain information about the location and direction of the first user using the information on the absolute position of the first location tracking device 100, the second location tracking device 200 Information about the location and direction of the second user may be obtained by using information about the absolute location of the second user.

In addition, the server (not shown) may acquire information about the position and the direction of the first user's hand by using the information about the absolute position of one or

more wearables

151 and 152 receiver worn by the first user. The second user may acquire information about the position and the direction of the hand of the second user by using the information about the absolute position of one or

more wearables

251 and 252 receivers worn by the second user.

However, this is only an example, and the server (not shown) may grasp the location and operation of the first user and the location and operation of the second user in various ways.

For example, when the information about the absolute position of the first location tracking device 100 and the information about the relative location of the second location tracking device 200 is received, the server (not shown) is the first location tracking device 100. It can also be implemented by obtaining information on the absolute position of the second position tracking device 200 based on the information on the absolute position of the information and the relative position of the second position tracking device 200.

As another example, when information about the absolute position of the first location tracking device 100 and the information about the relative position of the third wearable receiver 251 worn by the second user is received, the server (not shown) The information on the absolute position of the third wearable receiver 251 based on the information about the absolute position of the first position tracking device 100 and the relative position of the third wearable receiver 251 worn by the second user. It can also be implemented by way of acquisition.

As such, when the first user and the second user approach each other, the second location tracking device 200 operates as a receiver and the first location tracking device 100 operates as a transmitter, thereby overlapping electromagnetic fields. It can overcome the problem of harm to human body that can occur by release.

That is, the transmitter 130 of the first location tracking device 100 may emit an electromagnetic field of a specific frequency regardless of the distance from the second location tracking device 200, and the transmitter (of the second location tracking device 200) If the distance from the first location tracking device 200 is greater than or equal to a certain distance, the 230 may emit an electromagnetic field of the same frequency as the electromagnetic field emitted from the first location tracking device 100.

From the point of view of product producers, if the different positioning devices have different frequencies, each of the plurality of positioning devices must be assigned a different frequency, and therefore, each of the plurality of positioning devices must be designed differently. Not only is this a huge disadvantage, but the more products on the market, the more difficult it is to assign different frequencies.

Therefore, according to the present invention, the frequency of the electromagnetic field emitted by the transmitter 130 of the first position tracking device 100 and the frequency of the electromagnetic field emitted by the transmitter 230 of the second position tracking device 200 are the same. Uniform design of a plurality of position tracking devices produced by the producer may be possible.

In addition, when the frequency of the electromagnetic field emitted from the transmitter 130 of the first position tracking device 100 and the frequency of the electromagnetic field emitted from the transmitter 230 of the second position tracking device 200 become equal, When the tracking device 100 and the second location tracking device 200 approach each other, interference between electromagnetic fields may be issued, thereby lowering the accuracy of recognition or making the recognition itself impossible.

However, in the present invention, when the first location tracking device 100 and the second location tracking device 200 approach each other, the interference between electromagnetic fields may be prevented by operating the second location tracking device 200 as a receiver. Also, when the first location tracking device 100 and the second location tracking device 200 approach each other, even when the second location tracking device 200 is operated as a receiver, the first location tracking device 100 is discharged from the first location tracking device 100. The electromagnetic field may be used to determine the location and operation of the second user.

The control unit 110 of the first location tracking device 100 is a distance between the first location tracking device 100 and the second location tracking device 200 based on the information on the relative position of the second location tracking device 200. Obtain information about.

In addition, when the distance between the first location tracking device 100 and the second location tracking device 200 is greater than or equal to a preset distance, the control unit 110 of the first location tracking device 100 is the second location tracking device 200. The transmitter operation command 1711 may be transmitted.

Meanwhile, when the transmitter operation command is received, the controller 210 of the second location tracking device 200 may control the second location tracking device 200 to operate as a transmitter.

On the other hand, the control unit 110 of the first location tracking device 100 based on the information on the relative position of the second location tracking device 200, the first location tracking device 100 and the second location tracking device 200. Although it has been described as obtaining information on the distance between, it is not limited thereto. For example, the controller 110 of the first location tracking device 100 may be configured based on the information on the absolute location of the first location tracking device 100 and the information on the absolute location of the second location tracking device 200. Information about a distance between the first location tracking device 100 and the second location tracking device 200 may be obtained.

In FIG. 17, the second position tracking apparatus 200 operates as a transmitter by receiving a transmitter operation command, but is not limited thereto.

For example, when the electromagnetic field emitted from the first location tracking device 100 is detected, the control unit 210 of the second location tracking device 200 acquires the location information of the second location tracking device 200, and obtains it. The information on the distance between the first location tracking device 100 and the second location tracking device 200 may be acquired based on the location information of the second location tracking device 200.

Specifically, the location information of the second location tracking device 200 may include three-axis position coordinates of the second location tracking device 200 based on the first location tracking device 100. In this case, the control unit 210 of the second location tracking device 200 is based on the three-axis position coordinates of the second location tracking device 200 based on the first location tracking device 100. Information about the distance between the 100 and the second location tracking device 200 may be obtained.

Meanwhile, if the distance between the first location tracking device 100 and the second location tracking device 200 is greater than or equal to a preset distance, the control unit 210 of the second location tracking device 200 may control the second location tracking device 200. Can be controlled to act as a transmitter.

In addition, the transmitter operation command may be sent by one or more hosts.

Specifically, the control unit 110 of the first location tracking device 100 is information on the absolute position of the first location tracking device 100, the information on the relative position of the second location tracking device 200 and the second location. As described above, at least one of the information on the absolute position of the tracking device 200 may be transmitted to the host.

In this case, the one or more hosts may be based on the information about the relative position of the second location tracking device 200, or the first absolute location of the first location tracking device 100 and the first location of the second location tracking device 200. 1 Based on the information about the absolute position, it is possible to obtain information about the distance between the first location tracking device 100 and the second location tracking device 200.

In addition, when the distance between the first location tracking device 100 and the second location tracking device 200 is greater than or equal to a predetermined distance, one or more hosts may transmit a transmitter operation command to the second location tracking device 200.

Meanwhile, in FIGS. 1 to 17, the second location tracking device 200 operates as a transmitter or a receiver based on the distance between the first location tracking device 100 and the second location tracking device 200. However, it is not limited thereto.

Specifically, both the first location tracking device 100 and the second location tracking device 200 may operate as a transmitter. However, in this case, the first position tracking device 100 and the second position tracking device 200 may receive a synchronization signal and acquire position information without interference of the electromagnetic field by alternately emitting an electromagnetic field according to the synchronization signal. Can be.

It is assumed that the first location tracking device 100 operates as a host.

Currently, the first location tracking device 100 is located at the left side, the second location tracking device 200 is located at the right side, and the third location tracking device 1800 is located at the center.

When the distance between the first location tracking device 100 and the second location tracking device 200 is greater than or equal to a predetermined distance, both the first location tracking device 100 and the second location tracking device 200 may operate as transmitters. When the distance between the first location tracking device 100 and the second location tracking device 200 is within a predetermined distance, the first location tracking device 100 operates as a transmitter and the second location tracking device 200 operates as a receiver. can do.

Meanwhile, like the second location tracking device 200, the third location tracking device 1800 may change an operation state based on the distance from the first location tracking device 100. Specifically, when the distance between the first location tracking device 100 and the third location tracking device 1800 is greater than or equal to a preset distance, both the first location tracking device 100 and the third location tracking device 1800 operate as transmitters. If the distance between the first location tracking device 100 and the third location tracking device 1800 is within a preset distance, the first location tracking device 100 is a transmitter, and the third location tracking device 1800 is Can act as a receiver.

However, when the third position tracking device 1800 operates as a receiver but is close to the first position tracking device 100 operating as a transmitter and also close to the second position tracking device 200 operating as a transmitter, the first Interference between the electromagnetic field emitted by the location tracking device 100 and the electromagnetic field emitted by the second location tracking device 200 may occur.

In this case, at least two or more of the plurality of position tracking devices operating as transmitters may alternately emit electromagnetic fields.

Specifically, when the third location tracking device 1800 starts operation or operates as a receiver, the first location tracking device 100, the second location tracking device 200, and the third location tracking device 1800 are synchronized with each other. You can share the signal.

In addition, the first position tracking device 100 and the second position tracking device 200 may alternately emit an electromagnetic field according to the synchronization signal.

For example, as shown in FIG. 18, based on the first synchronization signal, the first location tracking device 100 may emit an electromagnetic field, and the second location tracking device 200 may not emit an electromagnetic field. . When the first synchronization signal is received, the third location tracking device 1800 may transmit location information of the third location tracking device 1800 to the first location tracking device 100. In addition, when the first synchronization signal is received, the one or more wearable devices 1831 and 1852 worn by the third user may also transmit their own location information to the first location tracking device 100.

For another example, as shown in FIG. 19, based on the second synchronization signal, the first position tracking device 100 may not emit an electromagnetic field, and the second position tracking device 200 may emit an electromagnetic field. have. When the second synchronization signal is received, the third location tracking device 1800 may transmit location information of the third location tracking device 1800 to the second location tracking device 200. In addition, when the second synchronization signal is received, one or more wearable devices 1831 and 1852 worn by the third user may also transmit their own location information to the second location tracking device 200.

As another example, when the second location tracking device 200 and the third location tracking device 1800 both operate as transmitters and are located close to each other, the electromagnetic field emitted by the second location tracking device 200 and the third location tracking device. Interference of electromagnetic fields emitted by the device 1800 may occur. Even in this case, the second location tracking device 200 and the third location tracking device 1800 may share a synchronization signal, and the second location tracking device 200 and the third location tracking device 1800 may alternately. Can emit electromagnetic fields.

Meanwhile, in the present exemplary embodiment, three location tracking devices exist in a specific space, but the present disclosure is not limited thereto.

For example, even in the presence of four or more positioning devices, two positioning devices acting as transmitters emit electromagnetic fields alternately, or three or more positioning devices acting as transmitters generate electromagnetic fields one by one according to the synchronization signal. It can be implemented in a way to release.

As described above, when three or more position tracking devices exist in a specific space, two or more position tracking devices emitting an electromagnetic field alternately emit an electromagnetic field, thereby tracking the position or operation of all users without interference of the electromagnetic field. There are advantages to it.

According to an embodiment of the present invention, a location tracking system includes a first location tracking device 100 worn by a first user, one or more

wearable receivers

151 and 152 worn by a first user, and an agent worn by a second user. The second position tracking device 200, one or more

wearable receivers

251 and 252 worn by the second user, one or more

fixed receivers

51, 52, 53, and 54, and an external control device 2000 may be included. The external control device 2000 may operate as a host, and the first location tracking device 100 and the second location tracking device may operate as clients.

In this embodiment, the first location tracking device 100 worn by the first user, one or more

wearable receivers

151 and 152 worn by the first user, the second location tracking device 200 worn by the second user, Operations of one or more

wearable receivers

251 and 252 and one or more

fixed receivers

51, 52, 53, and 54 worn by the second user may be the same as those described with reference to FIGS. 1 to 19.

However, the transmitter operation command or the receiver operation command received by the second location tracking device 200 may be a command transmitted from the external control device 2000.

In one embodiment, at least one of the first location tracking device 100 and the second location tracking device 200, information about the absolute position of the first location tracking device 100, the second location tracking device 200 At least one of the information on the absolute position of the information and the relative position of the second location tracking device 200 may be transmitted to the external control device (2000).

In this case, the external control device 2000 obtains information on the distance between the first location tracking device 100 and the second location tracking device 200 based on the received information, and operates the transmitter based on the obtained information. Command (control command for the second position tracking device to emit an electromagnetic field) or receiver operation command (stop the emission of the electromagnetic field of the second position tracking device and transmit the position information of the second position tracking device to the first position tracking device) Control command) to the second location tracking device 200.

In another embodiment, the external control device 2000 may include an external device (the first location tracking device 100 worn by the first user, one or more

wearable receivers

151 and 152 worn by the first user, and the second user. The second location tracking device 200 to be worn, the one or more

wearable receivers

251 and 252 and the one or more

fixed receivers

51, 52, 53, and 54 worn by the second user. Location information can be received.

In addition, based on the received plurality of position information, the external control apparatus 200 may include information about the absolute position of the first position tracking apparatus 100, information about the absolute position of the second position tracking apparatus 200, and 2 information on the relative position of the position tracking device 200, information on the relative position of the wearable receiver (151, 152, 251, 252) and information on the absolute position of the wearable receiver (151, 152, 251, 252) At least one can be obtained.

In addition, the external control device 2000 may transmit a transmitter operation command or a receiver operation command to the second location tracking device 200 based on the obtained information.

Meanwhile, the external control device 2000 is described as one, but the present invention is not limited thereto, and the present location tracking system is connected to the first external control device and the second location tracking device 200 connected to the first location tracking device 100. It may be configured as a second external control device.

In this case, the first external control device may obtain information related to a location from the first location tracking device 100, and the second external control device may obtain information related to a location from the second location tracking device 200. . In addition, the first external control device and the second external control device may share the acquired information, and at least one of the first external control device and the second external control device may be configured based on the shared information. Information about the distance between the second location tracking device 200 and the second location tracking device 200 may be obtained, and a transmitter operation command or a receiver operation command may be transmitted.

The first user and the second user will each be described as an example of experiencing virtual reality in their own home.

The first user may experience virtual reality after wearing the first location tracking device 100 and one or more wearable receivers in one's home and arranging one or more fixed receivers.

In this case, information about the absolute position of the first location tracking apparatus 100, that is, information about the location coordinates and the direction coordinates of the first user determined regardless of other location tracking apparatuses may be transmitted to the server.

In addition, the second user may also experience virtual reality after wearing the second location tracking device 200 and one or more wearable receivers in one's home and arranging one or more fixed receivers.

In this case, too, information about the absolute position of the second location tracking device 200, that is, information about the location coordinates and the direction coordinates of the second user determined regardless of the other location tracking devices may be transmitted to the server. .

The server may construct a virtual reality image 2130 including a character 2131 corresponding to the first user and a character 2132 corresponding to the second user, and information about an absolute position of the first user and a second The virtual reality image 2130 may be provided to the users by accurately determining the position and the direction of the first user and the position and the direction of the second user in the virtual reality image 2130 using information about the absolute position of the user. .

As described above, the present invention provides a virtual reality image in a state in which the absolute position of the first user and the absolute position of the second user are accurately determined, thereby providing a more accurate and lively image to the user.

In addition, when each of the first user and the second user installs the fixed receiver, the absolute positions of the first user and the second user can be obtained, so that the first user and the second user are more accurate even if they are located in different spaces. And provide a vivid image to the user.

In addition, since the location of the second user is determined not independently from the relative relationship with the first user but independently from the first user, even if a problem such as an interruption of the first user or a communication error occurs, The advantage is that the user can continue to provide accurate images.

The first image of FIG. 22 is an image 2130 of a front view of a virtual space in which the first user 2131, the second user 2132, and the third user 2133 participate, and the second image of FIG. An image 2140 of the virtual space in which the first user 2131, the second user 2132, and the third user 2133 participate is viewed from the rear of the third user 2133.

The present invention is not only an absolute position but also an absolute position and a relative position of a first position tracking device worn by a first user, a second position tracking device worn by a second user, and a third position tracking device worn by a third user. The absolute position of the wearable receiver worn by the first user, the wearable receiver worn by the second user, and the wearable receiver worn by the third user may be determined using the information on.

Therefore, the present invention can more accurately determine not only the position and orientation of the user (the position and orientation of the head when the user wears the position tracking device on the head) but also the position and orientation of the user's hand or foot.

Therefore, as shown in the second image of FIG. 22, not only the position and direction of the plurality of

users

2131, 2132, and 2133 can be accurately displayed, but also the plurality of users, even when the direction of viewing the virtual space is changed. There are advantages in that various operations such as

hand gestures

2151 and 2152 of 2131, 2132, and 2133 can be accurately displayed.

Meanwhile, the controller 180 is generally configured to control the device, and may be mixed with a central processing unit, a microprocessor, a processor, and the like, and to control the overall operation of the device, such as the wireless communication unit 110. Combined with other functional parts, it can be implemented as a single-chip system (System-on-a-chip or System on chip, SOC, SoC).

The present invention described above can be embodied as computer readable codes on a medium in which a program is recorded. The computer-readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable media include hard disk drives (HDDs), solid state disks (SSDs), silicon disk drives (SDDs), ROMs, RAMs, CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, and the like. This also includes those implemented in the form of carrier waves (eg, transmission over the Internet). In addition, the computer may include the controller 180 of the terminal. Accordingly, the above detailed description should not be interpreted as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

Claims

A location tracking device,

A transmitter for emitting an electromagnetic field for obtaining position information of at least one of the wearable receiver, the fixed receiver, and the second position tracking device;

A communication unit communicating with an external device; And

And a controller for controlling the transmitter to emit the electromagnetic field, and receiving position information of the second position tracking device from the second position tracking device when the distance to the second position tracking device is within a preset distance.

Location tracking device.
The method of claim 1,

The control unit,

When the position information is received from the fixed receiver by emitting the electromagnetic field, obtaining information about the absolute position of the position tracking device based on the received position information of the fixed receiver.

Location tracking device.
The method of claim 2,

The control unit,

If the distance to the second location tracking device is within a predetermined distance, the information on the relative position of the second location tracking device is obtained by using the location information of the second location tracking device received by the electromagnetic field is emitted. Obtaining information about the absolute position of the second position tracking device by using the information on the relative position of the second position tracking device and the information on the absolute position of the position tracking device,

If the distance to the second location tracking device is greater than or equal to a predetermined distance, the information on the absolute location of the second location tracking device by receiving information about the absolute position of the second location tracking device from the second location tracking device. To obtain

Location tracking device.
The method of claim 3, wherein

The control unit,

Obtain information about a distance to the second location tracking device based on information on at least one of an absolute location of the location tracking device, an absolute location of the second location tracking device, and a relative location of the second location tracking device; and,

When the distance to the second location tracking device is within a predetermined distance in a state of more than a predetermined distance, and transmits a control command to the second location tracking device for stopping the emission of the electromagnetic field. ,

When the distance to the second location tracking device is within a predetermined distance or more than a predetermined distance, and transmits a control command to the second location tracking device for causing the second location tracking device to emit an electromagnetic field.

Location tracking device.
The method of claim 1,

The control unit,

When the electromagnetic field is emitted, the position information of the wearable receiver is received from the wearable receiver, and the information on the relative position of the wearable receiver is obtained based on the position information of the received wearable receiver.

Location tracking device.
In the second position tracking device,

A transmitter for emitting an electromagnetic field for obtaining position information of at least one of the wearable receiver and the fixed receiver;

A receiver for sensing an electromagnetic field emitted from the position tracking device;

A communication unit communicating with an external device; And

The transmitter is controlled to emit the electromagnetic field when the distance to the position tracking device is greater than or equal to a preset distance. When the distance to the position tracking device is within the predetermined distance, the transmitter is stopped and the detected electromagnetic field is And a control unit for transmitting the location information of the second location tracking device obtained based on the location tracking device.

Second position tracking device.
The method of claim 6,

The control unit,

Obtaining information about the absolute position of the second position tracking device based on the position information of the fixed receiver received by emitting the electromagnetic field,

Transmitting information about the absolute position of the acquired second position tracking device to the position tracking device

Second position tracking device.
The method of claim 7, wherein

The control unit,

Receiving a control command from the location tracking device to stop the emission of the electromagnetic field of the second location tracking device when the distance to the location tracking device is within a preset distance while the distance with the location tracking device is greater than or equal to a preset distance;

Receiving a control command from the location tracking device for causing the second location tracking device to emit an electromagnetic field when the distance from the location tracking device is within a preset distance.
The method of claim 6,

The control unit,

Receiving position information of the wearable receiver from the wearable receiver when the electromagnetic field is emitted, and obtaining information on the relative position of the wearable receiver based on the received position information of the wearable receiver.

Second position tracking device.
The method of claim 6,

The frequency of the electromagnetic field emitted from the positioning device and the frequency of the electromagnetic field emitted from the second positioning device are the same.

Second position tracking device.
A location tracking system comprising a host, location tracking device and second location tracking device,

A location tracking device that emits an electromagnetic field for obtaining location information of at least one of a wearable receiver, a fixed receiver, and the second location tracking device, regardless of a distance from the location tracking device;

A second location tracking device that emits an electromagnetic field for obtaining location information of at least one of the wearable receiver and the fixed receiver when the distance from the location tracking device is greater than or equal to a preset distance; And

On the basis of the information on the distance between the location tracking device and the second location tracking device, a control command for stopping the emission of the electromagnetic field of the second location tracking device is transmitted to the second location tracking device or the second location tracking device. A host for transmitting a control command to the second location tracking device for causing the location tracking device to emit an electromagnetic field.

A location tracking system comprising a host, a location tracking device and a second location tracking device.