KR20120049600A - Short range position tracking system and method using wireless network - Google Patents

Abstract

PURPOSE: A short distance position tracking system which utilizes a wireless network and a method thereof are provided to detect and track the location of a moving body in a dead zone such as indoor or underground regions. CONSTITUTION: A short distance position tracking system comprises an RF transmitting terminal(10), three of more RF transmitting/receiving terminals(20), and a position calculation terminal(30). The RF transmitting/receiving terminal receives an RF signal from the RF transmitting terminal. The RF transmitting/receiving terminal measures a level of the RF signal and transmits the level of the RF signal to the position calculation terminal. The position calculation terminal receives the level of the RF signal and location information of the RF transmitting/receiving terminal from the RF transmitting/receiving terminal. The location of a moving body is calculated and tracked based on received position coordinates of the arbitrary three or more RF transmitting/receiving terminals.

Description

Short range position tracking system and method using wireless network

The present invention relates to a short-range location tracking system that can wirelessly track the location of a mobile object located in a short distance, and in particular, in a shadow area such as indoors or underground (where GPS or mobile phone signals are not detected) Calculate real-time triangular coordinates with RF technology that enables users to locate and track errors that can occur when tracking the location of a moving object with human intuition or sensory with the help of a server, a smartphone, or a terminal equipped with a CPU. The present invention relates to a short-range location tracking system and method using a terminal.

With the rapid progress of nuclear familialization and aging, the number of the elderly living alone is increasing, and thus the elderly living alone and patients living alone (for example, those suffering from mental retardation diseases such as dementia or chronic) There is an increasing demand for the management of patients suffering from diseases).

The elderly and patients living alone are mostly in poor health and do not know when an emergency occurs, and when an emergency occurs, an emergency action is not taken and a life is lost. Therefore, for the safety of the elderly and patients living alone, there is a need to observe the location and activity of indoor residents.

Meanwhile, even in a hospital, a doctor or a nurse needs to know the location of a particular patient. At this time, if the location of the patient can be confirmed in real time, it is very helpful for managing the patient's bed.

In addition, in kindergarten or day care centers, children have a lot of difficulties in controlling children because they behave randomly. In this case, it is very helpful to check the location of the children correctly.

As such, there is an increasing demand for a location-aware technology for identifying a specific person's location. In general, the location-aware technology includes a cell-id method using a mobile communication base station, a GPS method using a satellite, and an A-GPS (GPS + base station). Although they are actively developed and serviced mainly on the outdoor basis such as the method and the terrestrial base station method, all of them have a vulnerability that is only monitored as being inside when the moving object enters the indoor or underground.

Location tracking of people, robots, and objects moving indoors, not outdoors, such as location tracking using ultrasound, location tracking using vision, laser location, etc., such as CRICKET, ACTIVE BAT, iGS.

However, when tracking the location in an area where the field of view is not secured, the location can only be tracked with human intuition or sensation, a lot of errors and time can occur, and it is inefficient due to the limitation of human computing ability. . Therefore, the present invention can overcome the limitations and range of human by calculating the expected direction through a terminal, such as a server or a smart phone with a built-in triangulation algorithm, can shorten the tracking time and increase the effectiveness. In addition, the location tracking equipment described above is quite expensive, and there is a disadvantage that the terminal must be specially manufactured for location tracking.

The present invention has been made to solve the above problems, the object of which is a triangulation algorithm embedded in a terminal such as a server or a smart phone in which location on the floor in a building in a shaded area, such as indoors or underground It is to provide a short-range location tracking system and method using RF technology that can identify and track the location by using (triangulation).

In order to achieve the above object, the present invention provides a short-range location tracking system using a wireless network that can wirelessly track the location of a mobile object located indoors, attached to or carried on a mobile object such as a person or an object requiring location tracking. An RF transmitting terminal for transmitting an RF signal; Three or more RF transmitting and receiving terminals for receiving the RF signal transmitted from the RF transmitting terminal, measuring the level of the received RF signal, and transmitting the received RF signal to a position calculating terminal; Receive the level value of the RF signal and the position information of the corresponding RF transmitting and receiving terminal from the three or more RF transmitting and receiving terminals, and using the triangulation method based on the position coordinates of the received three RF transmitting and receiving terminals; And a position calculating terminal for calculating and tracking the position of the RF transmitting terminal), wherein the RF transmitting and receiving terminal is configured to monitor the position of the moving object in real time using the position tracking information of the moving object transmitted from the position calculating terminal. .

The communication method between the RF transmitting terminal and the RF transmitting and receiving terminal is characterized by using any one of a wireless LAN, Bluetooth, Bluetooth, Zigbee, Ultra Wide Band (UWB) or WiFi.

The greater the level of the RF signal received from the RF transmitter terminal, the shorter the distance between the RF transmitter terminal and the corresponding RF transmitter / receiver terminal.

According to the material of an obstacle such as a wall or a panel located between the RF transmitting terminal and the RF transmitting and receiving terminal, the RF signal received by the RF transmitting and receiving terminal may be applied differently.

In addition, the present invention is a short-range location tracking system using a wireless network that can wirelessly track the location of the moving object located indoors, the RF signal is transmitted to or attached to a mobile object, such as a person or an object that needs location tracking An RF calling terminal; Receiving an RF signal transmitted from the RF transmitting terminal, and including at least three RF transmitting and receiving terminals for measuring the level of the received RF signal, wherein the RF transmitting and receiving terminal and the level value of the RF signal from the other RF transmitting and receiving terminal Receives the position information of the RF transmitter and receiver, calculates and tracks the position of the moving object using triangulation based on the position coordinates of any three RF transmitting and receiving terminals, and tracks the position tracking information of the moving object. It is characterized in that the transmission to the RF transmitting and receiving terminal.

In addition, the present invention is a short-range location tracking method using a wireless network that can wirelessly track the location of the mobile located in the room, a plurality of RF transmitting and receiving terminals RF signals transmitted from the RF transmitting terminal attached or carried in the mobile, respectively RF signal receiving step of receiving; An RF signal collecting step of receiving, by one RF transmitting and receiving terminal, a level value of the RF signal and position information of the corresponding RF transmitting and receiving terminal from two or more remaining RF transmitting and receiving terminals except the RF transmitting and receiving terminal; And a moving position tracking step of calculating and tracking the position of the moving object using triangulation based on the position coordinates of any three RF transmitting and receiving terminals, wherein the moving position tracking step includes the one RF transmitting and receiving terminal or the It is characterized in that it is performed by a position calculation terminal that receives the position coordinates of any three RF transmitter and receiver terminals from one RF transmitter and receiver terminal.

After performing the moving object position tracking step, the position tracking information transmission step of transmitting the position tracking information of the moving object to a plurality of RF transmitting and receiving terminals in different positions of the RF signal collection step.

After performing the position tracking information transmitting step, characterized in that it comprises a monitoring step of real-time monitoring the position of the moving object using the position tracking information of the moving object.

According to the material of an obstacle such as a wall or a panel located between the RF transmitting terminal and the RF transmitting and receiving terminal, the RF signal received by the RF transmitting and receiving terminal may be applied differently.

Computing and tracking the position of the moving object using the triangulation method comprises the steps of setting the position coordinates of the first RF transmitting and receiving terminal of the plurality of RF transmitting and receiving terminals to the reference coordinate A (0,0) of the two-dimensional coordinate system plane; Setting the position coordinates of the second RF transmitting / receiving terminal among the plurality of RF transmitting / receiving terminals to B (d1,0) on the same X axis as the reference coordinate A (0,0); Setting C (x, y) to position coordinates of a third RF transmitting and receiving terminal among a plurality of RF transmitting and receiving terminals so as to be triangular with A (0,0) and B (d1,0); Calculating a positional coordinate C (x, y) of the third RF transceiver terminal as a distance formula between two points; Proximity position a2 (x2, y2) of the mobile body by point A and point B, Proximity position a3 (x3, y3) of mobile body by point B and point C, Proximity position of the moving body by point C and point A obtaining a1 (x1, y1); And tracking the center of gravity of the proximal positions a1 (x1, y1), a2 (x2, y2), and a3 (x3, y3) of the movable body to the optimal position of the movable body.

After tracking the optimal position of the moving object, characterized in that it further comprises the step of checking whether the position of the tracked moving object is located inside the triangle ABC.

As described above, according to the present invention, it is possible to identify and track how many floors are located in a building in a shaded area such as indoors or underground.

In addition, it is possible to implement a wireless indoor location tracking system at low cost using RF technology and triangulation.

Particularly, in the present invention, an error that may occur while a tracker having an RF transmitting and receiving terminal intuitively tracks an object when both an RF transmitting terminal and an RF transmitting and receiving terminal moves, is located in a terminal (remote server, a smartphone, or a CPU with a built-in terminal). Instead, calculations and tracking can correct and compensate for the limitations and errors of human calculations.

1 is a near-position tracking system using a wireless network according to the present invention.
2 is a block diagram of an RF transmitting terminal of the present invention.
3 is a block diagram of an RF transmitting and receiving terminal of the present invention.
4 is a block diagram of a location calculation terminal (eg, a remote server) of the present invention.
5 is a flowchart illustrating a method for tracking a short-range location using a wireless network according to the present invention.
Figure 6 is a flow chart illustrating in more detail the moving object tracking process according to the present invention.
7A to 7C are diagrams showing triangulation methods required for a moving object tracking process.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a diagram of a short-range location tracking system using a wireless network according to the present invention, FIG. 2 is a block diagram of an RF transmitting terminal of the present invention, FIG. 3 is a block diagram of an RF transmitting and receiving terminal of the present invention, and FIG. This is a block diagram of a location calculation terminal (eg, a remote server) of the present invention.

The short-range location tracking system of the present invention is a system capable of wirelessly tracking the position of a mobile body located in the room, including an RF transmitting terminal 10, three or more RF transmitting and receiving terminal 20 and the position calculating terminal 30 Is done.

The RF transmitting terminal 10 is a terminal attached to or carried on a moving object such as a person or an object that needs location tracking to transmit an RF signal, and transmits the position information to the surrounding RF transmitting and receiving terminal 20 every predetermined time.

As shown in FIG. 2, the RF transmitting terminal 10 includes a first RF communication module 11, a first microcomputer 12, an RF signal generation unit 13, a first memory unit 14, and a power supply unit 15. It is configured to include.

The first RF communication module 11 is a communication module for wireless communication with a plurality of RF transmitting and receiving terminals 20.

The RF signal generator 13 generates location information of the corresponding RF transmitter terminal 10.

The first microcomputer 12 controls each component of the RF transmitting terminal 10, and in particular, transmits the position information generated by the RF signal generating unit 13 of the RF transmitting terminal 10 to the RF transmitting and receiving terminal 20. To control.

The first memory unit 14 stores an operation program of the RF transmitter terminal 10 and position information generated by the RF signal generator 13.

The power supply unit 15 supplies power to each component of the RF transmitting terminal 10.

The RF transmitting and receiving terminal 20 receives the RF signal transmitted from the RF transmitting terminal 10, measures the level of the received RF signal, and performs a function of transmitting the position calculating terminal 30.

As shown in FIG. 3, the RF transmission / reception terminal 20 includes a second RF communication module 21, a second microcomputer 22, an RF signal level measurement unit 23, a second memory unit 24, and a power supply unit 25. It is configured to include.

The second RF communication module 21 is provided to communicate with the first RF communication module 11 of the RF transmitting terminal 10 attached to the mobile body or the communication module 31 of the position calculating terminal 30.

The RF signal level measuring unit 23 measures the level of the RF signal received from the RF transmitting terminal 10.

For example, the RF signal level may be expressed numerically according to sensitivity, and the larger the value, the shorter the distance between the RF transmitting terminal 10 and the corresponding RF transmitting and receiving terminal 20 is.

In addition, the present invention is a level value of the RF signal received by the RF transmitting and receiving terminal 20 according to the material of the obstacle, such as a wall or panel located between the RF transmitting terminal 10 and the RF transmitting and receiving terminal 20. By applying differently, the distance between the RF transmitting terminal 10 and the RF transmitting and receiving terminal 20 may be determined using the level value K of the final RF signal.

In more detail, the level value K of the final RF signal may be represented by K '+ a, where K' is the RF signal measured by the RF signal level measuring unit 23 of the actual RF transmission / reception terminal 20. Is a level value of, and a is a value corresponding to the material of the obstacle located between the RF transmitting terminal 10 and the RF transmitting and receiving terminal 20. For example, '10' if the material is concrete, and '5' ', If the panel has a' 2 '. These values are stored in the second memory unit 24 in advance by the user.

For example, if the level value of the actual RF signal measured at the first RF transmitting and receiving terminal is '10', and the material of the obstacle located between the RF transmitting terminal 10 and the first RF transmitting and receiving terminal is concrete, the first RF transmitting and receiving terminal is calculated. The level value K1 of the final RF signal is '20'.

In addition, if the level value of the actual RF signal measured by the second RF transmitting and receiving terminal is '8' and the material of the obstacle located between the RF transmitting terminal 10 and the second RF transmitting and receiving terminal is a panel, the final calculated by the second RF transmitting and receiving terminal The level value K2 of the RF signal is '10'.

In addition, if the level value of the actual RF signal measured by the third RF transmitting and receiving terminal is '6', and the material of the obstacle located between the RF transmitting terminal 10 and the third RF transmitting and receiving terminal is gypsum, the final calculated by the third RF transmitting and receiving terminal The level value K3 of the RF signal is '11'.

The second microcomputer 22 controls each component of the RF transmitting and receiving terminal 20, in particular, calculates the level value of the final RF signal.

The second memory unit 24 corresponds to a level value of the actual RF signal measured by the RF signal level measuring unit 23, and a material of an obstacle located between the RF transmitting terminal 10 and the RF transmitting and receiving terminal 20. Value, the level value of the final RF signal and the position information of the RF transmitting and receiving terminal 20 are stored. These values are transmitted to the location calculation terminal 30 through the second RF communication module 21.

The power supply unit 25 supplies power to each component of the RF transmission / reception terminal 20.

In the present invention, a plurality of RF transmitting and receiving terminals 20 may transmit data to the position calculating terminal 30, respectively, but using one RF transmitting and receiving terminal 20 as a master, from the other RF transmitting and receiving terminal (slave RF transmitting and receiving terminal). The data may be collected and transmitted to the location calculation terminal 30.

The position calculating terminal 30 receives the level values of the RF signal and the position information of the corresponding RF transmitting and receiving terminal 20 from three or more RF transmitting and receiving terminals 20, and receives the received arbitrary three RF transmitting and receiving terminals 20. Based on the position coordinate of the triangulation method to calculate the position of the moving object and serves to track in real time.

The location calculation terminal 30 is an example of a generic term for a terminal having a remote server, a smartphone, or a CPU.

The position calculation terminal 30 includes a communication module 31, a third microcomputer 32, a position tracking unit 33, a third memory unit 34, and a power supply unit 35.

The communication module 31 is provided for communication with the RF transmission and reception terminal 20.

The position tracking unit 33 stores data transmitted from the RF transmitting and receiving terminal 20 (level value of the RF signal measured by the RF transmitting and receiving terminal, position information of the corresponding RF transmitting and receiving terminal, and optionally, the level value of the final RF signal). Calculate and track the position of the moving object.

At this time, the triangulation method is used to calculate and track the position of the moving object, based on the position coordinates of any three RF transmitting and receiving terminals 20 and the level value of the actual RF signal (or the level value of the final RF signal). It is done.

As described above, the triangulation method may be based on the position coordinates of any three transmitting and receiving terminals, but may be based on the position coordinates of the three RF transmitting and receiving terminals 20 having the largest level of the RF signal. It may be.

The third microcomputer 32 controls each component of the position calculation terminal 30, in particular, calculates and tracks the position of the moving object through the position tracking unit 33, and the tracking result (position information of the moving body) is RF. Control to be transmitted to the transmission and reception terminal 20.

The third memory unit 34 stores an operation program of the position calculating terminal 30, data transmitted from the RF transmitting and receiving terminal 20, position information of the moving object calculated and tracked by the position tracking unit 33, and the like.

The power supply unit 35 supplies power to each component of the position calculation terminal 30.

In addition, the RF transmitting and receiving terminal 20 of the present invention also performs a function of real-time monitoring the position of the moving object using the position tracking information of the moving object transmitted from the position calculating terminal 30.

Examples of communication methods between the RF transmitting terminal 10 and the RF transmitting and receiving terminal 20 include wireless LAN, Bluetooth, Zigbee, UWB (Ultra Wide Band) or WiFi.

Meanwhile, as another example of the present invention, the position calculating terminal 30 of FIG. 1 may be configured to be performed by any one of the plurality of RF transmitting and receiving terminals 20.

That is, the short-range location tracking system using a wireless network according to another embodiment of the present invention comprises an RF transmitting terminal 10 and the RF transmitting and receiving terminal 20.

As described with reference to FIG. 1, the RF transmitting terminal 10 is attached to or carried on a moving object such as a person or an object requiring location tracking and transmits an RF signal.

One RF transmitter / receiver terminal of the plurality of RF transmitter / receiver terminals 20 is set as a master, and the other RF transmitter / receiver terminal is set as a slave.

This master RF transmitting and receiving terminal performs the function of the position calculating terminal 30 of FIG.

That is, the master RF transmitting and receiving terminal receives the RF signal from the RF transmitting terminal 10, which is an original function, measures the level of the received RF signal, and transmits the RF signal from another RF transmitting and receiving terminal (slave RF transmitting and receiving terminal). Receive the level value and the position information of the corresponding slave RF transmitter and receiver, and calculate the position of the moving object using triangulation based on the position coordinates of three RF transmitter and receiver terminals including the master RF transmitter and receiver terminal among the received values. To track.

In addition, the master RF transmitting and receiving terminal transmits the position tracking information of the moving object to the slave RF transmitting and receiving terminal.

5 is a flowchart illustrating a method for tracking a short distance location using a wireless network according to the present invention.

First, in a state in which a short-range position tracking system as shown in FIG. 1 is implemented, an RF signal receiving step of receiving RF signals transmitted from an RF transmitting terminal 10 attached or carried to a mobile body in each of a plurality of RF transmitting and receiving terminals 20 (S110).

Thereafter, the present invention collects an RF signal in which one RF transmitting and receiving terminal 20 receives a level value of an RF signal and position information of the corresponding RF transmitting and receiving terminal 20 from two or more remaining RF transmitting and receiving terminals except for the RF transmitting and receiving terminal. Step S120 is performed.

After performing the RF signal collection step (S120), the present invention is a moving object position tracking step of calculating and tracking the position of the moving object using a triangulation method based on the position coordinates of the three RF transmitting and receiving terminals 20 (S130) ). As described above, the moving object calculation and tracking may be performed in one RF transmitting and receiving terminal 20, but may be performed in the position calculating terminal 30.

After performing the moving object position tracking step (S130), the position tracking information transmission step of transmitting the position tracking information of the moving object to a plurality of RF transmitting and receiving terminal 20 at different positions of the RF signal collection step (S120) (S140).

After performing the position tracking information transmitting step (S140), and performing a monitoring step (S150) for real-time monitoring the position of the moving object using the position tracking information of the moving object. For example, in the monitoring step (S150), it may be configured to display the location (including coordinates and direction) of the moving object on the map of the building.

The present invention further includes a step of generating a location information request signal to the RF transmitting terminal 20 before the RF signal receiving step S110, and correspondingly, the RF transmitting terminal 10 The RF transmission / reception terminal 20 may be configured to transmit an RF signal.

6 is a flowchart illustrating a moving position tracking process in detail according to the present invention, Figures 7a to 7c is a view showing a triangulation method required for the moving position tracking process. A, B, and C shown below indicate position information (coordinates, etc.) of an arbitrary RF transmitting and receiving terminal 20.

First, the position coordinates of the first RF transmitting and receiving terminal among the plurality of RF transmitting and receiving terminals are set as the reference coordinate A. At this time, the reference coordinate A is the origin (0,0) of the two-dimensional coordinate system plane (S131).

Then, the position coordinates of the second RF transmitting and receiving terminal of the plurality of RF transmitting and receiving terminals is fixed to the position of the second point (B). Point B is on the same X-axis as point A. As an example, as shown in the figure, the position of B is set to (d1,0). (S132)

Finally, triangulation method is used to find the coordinates of C (x, y), the third point for finding the position of the moving object.

That is, C (x, y) is set such that the position coordinates of the third RF transmitting / receiving terminal among the plurality of RF transmitting / receiving terminals are triangular with the A (0,0) and B (d1,0).

Thereafter, the position coordinate C (x, y) of the third RF transmitting and receiving terminal is calculated by the distance formula between two points. That is, x = (d2 ^ 2-d3 ^ 2-d1 ^ 2) / (-2d1) and y = sqrt (d3 ^ 2-x ^ 2). (See FIG. 7A) (S133)

As described above, after obtaining the positions A (0,0), B (d1,0), and C (x, y) of the three RF transmitting and receiving terminals 20, the proximity positions a1 (x1, y1), a2 (x2, y2) and a3 (x3, y3) are calculated.

That is, the position A2 (x2, y2) of the mobile body by the point A and the point B, the position a3 (x3, y3) of the moving body by the point B and the point C, and the point C and the point A of the movable body The proximity position a1 (x1, y1) is obtained (see FIG. 7B) (S134).

After that, the optimum position of the moving object a (x, y) is tracked (S135). The method of tracking the optimal position of the moving object a (x, y) includes the three points a1 (x1, y1) and a2 (x2). It can be found as the center of gravity for, y2) and a3 (x3, y3). That is, x = (x1 + x2 + x3) / 3 and y = (y1 + y2 + y3) / 3.

Thereafter, the present invention checks whether the optimal position a (x, y) of the tracked moving object is located inside the triangle ABC (S136), and if it is located inside, displays the corresponding position and repeats the previous step. The positions D and E of the other RF transmitting and receiving terminal 20 are calculated (S137).

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: RF call terminal
11: 1st RF communication module
12: First Microcomputer
13: RF signal generator
14: first memory unit
15: power supply
20: RF transmitting and receiving terminal
21: second RF communication module
22: the second microcomputer
23: RF signal level measuring unit
24: second memory unit
25: power supply
30: location calculation terminal
31: communication module
32: Third Microcomputer
33: location tracking unit
34: third memory section
35: power supply
S110: RF signal receiving step
S120: RF signal collection step
S130: moving object tracking step
S140: location tracking information transmission step
S150: monitoring step

Claims (11)

In the short-range location tracking system using a wireless network that can track the location of a mobile object located indoors wirelessly,
An RF transmitting terminal attached to or carried on a moving object such as a person or an object that needs location tracking and transmitting an RF signal;
Three or more RF transmitting and receiving terminals for receiving the RF signal transmitted from the RF transmitting terminal, measuring the level of the received RF signal, and transmitting the received RF signal to a position calculating terminal;
Receive the level value of the RF signal and the position information of the corresponding RF transmitting and receiving terminal from the three or more RF transmitting and receiving terminals, and using the triangulation method based on the position coordinates of the received three RF transmitting and receiving terminals; A location calculating terminal for calculating and tracking the location of the RF calling terminal);
The RF transmitting and receiving terminal is a short-range position tracking system using a wireless network, characterized in that for monitoring the position of the moving object in real time using the position tracking information of the moving object transmitted from the position calculation terminal. The method of claim 1,
The communication method between the RF transmitting terminal and the RF transmitting / receiving terminal may be any one of wireless LAN, Bluetooth, Zigbee, UWB (Ultra Wide Band) or WiFi. Local location tracking system using a network. The method of claim 2,
The short-range location tracking system using a wireless network, characterized in that the greater the level value of the RF signal received from the RF transmitting terminal is the distance between the RF transmitting terminal and the corresponding RF transmitting and receiving terminal. The method of claim 1,
Near-field location tracking using a wireless network, characterized in that the level of the RF signal received by the RF transmission and reception terminal according to the material of the obstacle, such as a wall or panel located between the RF transmitting terminal and the RF transmitting and receiving terminal system. In the short-range location tracking system using a wireless network that can track the location of a mobile object located indoors wirelessly,
An RF transmitting terminal attached to or carried on a moving object such as a person or an object that needs location tracking and transmitting an RF signal;
3 or more RF transmitting and receiving terminals for receiving the RF signal transmitted from the RF transmitting terminal and measuring the level of the received RF signal,
The RF transmitting and receiving terminal receives a level value of an RF signal and position information of the corresponding RF transmitting and receiving terminal from another RF transmitting and receiving terminal, respectively, and uses the triangulation method based on the position coordinates of the three received RF transmitting and receiving terminals. Computing and tracking the position of the moving object, the short-range position tracking system using a wireless network, characterized in that for transmitting the position tracking information of the mobile to another RF transmitting and receiving terminal. In the short-range location tracking method using a wireless network that can track the location of a mobile object located indoors wirelessly,
An RF signal receiving step of receiving an RF signal transmitted from an RF transmitting terminal attached or carried to a moving body in each of a plurality of RF transmitting and receiving terminals;
An RF signal collecting step of receiving, by one RF transmitting and receiving terminal, a level value of the RF signal and position information of the corresponding RF transmitting and receiving terminal from two or more remaining RF transmitting and receiving terminals except the RF transmitting and receiving terminal; And
And a moving object position tracking step of calculating and tracking the position of the moving object using triangulation based on the position coordinates of any three RF transmitting and receiving terminals,
The moving object position tracking step is performed by a position calculating terminal that receives the position coordinates of any one RF transmitting and receiving terminal or any three RF transmitting and receiving terminals from the one RF transmitting and receiving terminal. Tracking method. The method according to claim 6,
And performing location tracking information transmission step of transmitting location tracking information of the mobile device to a plurality of RF transmitting and receiving terminals at different locations of the RF signal collection step after performing the mobile location tracking step. Local location tracking method using a network. The method of claim 7, wherein
And performing a step of transmitting the location tracking information, and monitoring the location of the moving object in real time using the location tracking information of the moving object. The method according to claim 6,
Near-field location tracking using a wireless network, characterized in that the level of the RF signal received by the RF transmission and reception terminal according to the material of the obstacle, such as a wall or panel located between the RF transmitting terminal and the RF transmitting and receiving terminal Way. The method according to claim 6,
Computing and tracking the position of the moving object using the triangulation method,
Setting the position coordinates of the first RF transmitting and receiving terminal among the plurality of RF transmitting and receiving terminals to a reference coordinate A (0,0) of the two-dimensional coordinate system plane;
Setting the position coordinates of the second RF transmitting / receiving terminal among the plurality of RF transmitting / receiving terminals to B (d1,0) on the same X axis as the reference coordinate A (0,0);
Setting C (x, y) to position coordinates of a third RF transmitting and receiving terminal among a plurality of RF transmitting and receiving terminals so as to be triangular with A (0,0) and B (d1,0);
Calculating a positional coordinate C (x, y) of the third RF transceiver terminal as a distance formula between two points;
Proximity position a2 (x2, y2) of the mobile body by point A and point B, Proximity position a3 (x3, y3) of mobile body by point B and point C, Proximity position of the moving body by point C and point A obtaining a1 (x1, y1); And
And tracking the center of gravity of the proximal positions a1 (x1, y1), a2 (x2, y2), and a3 (x3, y3) of the moving object to the optimal position of the moving object. Close location tracking method used. The method of claim 10,
After the step of tracking the optimal position of the moving object, further comprising the step of checking whether the position of the tracked moving object is located inside the triangle ABC.

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