KR20180022441A - Integrated Control System for Safety, Security and Tracking with RTLS - Google Patents

Abstract

The present invention relates to an RTLS-based integrated control system for real-time safety, security, and positioning and, more specifically, relates to an RTLS-based integrated control system for real-time safety, security, and positioning, capable of providing real-time position information to an object as well as enhancing security and preventing accidents caused in an indoor environment by identifying position information of the object in real time through TDOA-based indoor positioning. The present invention comprises: at least three RTLS beacons placed in different indoor positions to output an RF signal and an ultrasonic signal at the same time; a plurality of listeners attached to an object to calculate position information of the object through triangulation by receiving the RF signal and ultrasonic signal from RTLS beacons; and an RTLS server receiving position information from listeners and mapping and delivering the position of the object with the RTLS beacons, and informing the object or the outside of a situation, in which the object enters a dangerous area or security zone, in accordance with preset conditions. Here, an object terminal, possessed by the object and receiving the mapped position information from the RTLS and providing the information to the user, is included, but the object terminal receives a warning message from the RTLS server when the object enters a dangerous area or security zone.

Description

The RTLS-based real-time safety, security, and location tracking system (Integrated Control System for Safety, Security and Tracking with RTLS)

The present invention relates to an RTLS-based real-time safety, security, and location tracking control system, and more particularly, to a real-time location, The present invention relates to an RTLS-based real-time safety, security, and position tracking integrated control system capable of preventing various risks that may occur in an indoor environment and enhancing security.

Recently, interest and investment in RFID (Radio Frequency Identification) and technology development are increasing. RFID technology is an RFID technology that attaches an electronic tag to an object, recognizes the unique ID of each RFID wirelessly, collects, stores, processes, and tracks the information to locate, remotely manage, manage, and exchange information between objects Which is a technology that provides services.

Particularly, an active RFID (Radio Frequency Identification) tag having a built-in internal battery and a transmitting device can be used for a variety of fields such as environmental monitoring, military service, medical care, and the like. Currently, a real time locating system (RTLS) is emerging as one of the active RFID tag applications, which can detect the location of a tagged object in real time. Here, the term " real time " means that the active RFID tag can calculate and confirm the position within 30 seconds after transmitting a blink signal including its own identification information.

Real Time Locating System (RTLS) is implemented based on Received Signal Strength Intensity / Identification (RSSI) and Time Difference of Alive (TDOA) technology.

The RSSI technique measures and uses the signal strength of a received wireless mobile device or tag to measure a power loss or path loss of a signal between a tag and an access point (AP) . Zigbee and Wi-Fi systems usually use the RSSI algorithm. Implementation is simple and often used, but it is hard to get accurate position.

In addition, Wi-Fi based technology is advantageous in that it does not require additional installation cost by using the AP as it is. However, it is necessary to stably hold 6 to 7 separate AP signals within 20m, input coordinates in various directions, There is a problem in that the accuracy of position recognition deteriorates because the error increases between 5m and 10m.

In addition, if the AP position is changed or turned off for 3G / 4G activation, the position recognition becomes impossible. In particular, there is a problem that speed and position recognition are limited when there are many users.

The TDOA technique measures the time difference between a tag and an AP or between a beacon and a listener. The current position of the tag or beacon is calculated using points having a constant time difference therebetween. It is the most common method and is used in UWB (Ultra Wide Band) and Wi-Fi systems. It is the same as the position confirmation method of the mobile phone, which is the current mobile communication terminal, and the position can be obtained up to 30cm level by UWB.

In addition, using Chirp Spread Spectrum (CSS) or IR-UWB based technology, which has recently been standardized and undergoing technological development, it will be possible to provide a precise positioning of less than 20 cm to 100 cm and a wider communication range.

However, UWB and CSS based technologies are simple in structure using RF only, but they require high cost chips from foreign companies, which requires a lot of installation cost and requires separate server and license fees.

In addition, the positioning accuracy is low when the positioning accuracy is low. However, if the moving speed is fast, the error rate can be increased from several meters to tens of meters. there is a problem.

Accordingly, the present invention provides a real-time tracking and providing of indoor location information through an RTLS system that can overcome the limitations of the Wi-Fi based or UWB based RTLS system.

In addition, by applying such real-time location information to the security and security areas within the building, it can be utilized for building more effective smart buildings.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a real-time location information of an object in real time through TDOA- Real-time safety, security, and location tracking integrated control system that can preemptively prevent unauthorized access and enhance security.

The present invention has the following features in order to achieve the above object.

The present invention provides a radio communication system comprising at least three RTLS beacons arranged at different positions in a room and simultaneously outputting an RF signal and an ultrasonic signal; A plurality of listeners attached to an object for receiving an RF signal and an ultrasonic signal from the at least three RTLS beacons, respectively, and calculating position information of the object by triangulation; Receives the location information of the object from the plurality of the listeners, maps the location of the object to which the RTLS beacon is attached, and maps the location of the object to the object, and when the location of the object enters the dangerous area or the secure area according to predetermined conditions, And an RTLS server for informing the outside.

Herein, the object terminal further includes an object terminal having the object and receiving the mapped location information from the RTLS server and providing the mapped location information to the user. In addition to the location information, the object terminal receives a warning from the RTLS server Receive the message.

The at least three RTLS beacons are configured to sequentially output an RF signal and an ultrasonic signal in a predetermined order within a predetermined time, and the plurality of listeners include an RF receiving unit for receiving an RF signal from the at least three RTLS beacons, An ultrasonic receiving unit that receives ultrasonic signals from the at least three RTLS beacons; and a controller that measures a time at which the ultrasonic signal is received by the ultrasonic receiving unit within a predetermined time from when the RF signal is received to the RF receiving unit And a control unit for receiving the received information from the timer unit and the RF receiving unit, the ultrasonic receiving unit and the timer unit, and calculating the current position information of the listener by the triangulation method.

The repeater further includes a repeater for relaying between the listener and the RTLS server, wherein the listener further includes a Bluetooth communication unit for communicating with the repeater, wherein the repeater is configured to transmit and receive data via the Bluetooth communication, Data transmission / reception is performed with the RTLS server through TCP / IP or UDP communication.

In addition, the RTLS server is notified of an external server corresponding to an emergency situation when the location information change of the object is not performed for a predetermined time.

According to the present invention, it is possible to provide logistics management, location guidance, and security service for enterprises, military facilities, and public institutions through tracking the location of real-time building visitors and enterprise products using signals having different frequencies at two different speeds.

In addition, if the location information of the elderly living alone is detected and there is no change in the location information for a certain period of time, it is determined that the emergency situation is an emergency and the information is transmitted to the associated external server.

1 is a schematic block diagram of an integrated control system according to an embodiment of the present invention.
2 is a block diagram showing an internal configuration of an RTLS beacon and a listener according to an embodiment of the present invention.
3 is a configuration diagram of an integrated control system according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For the sake of convenience, the size, line thickness, and the like of the components shown in the drawings referenced in the description of the present invention may be exaggerated somewhat. The terms used in the description of the present invention are defined in consideration of the functions of the present invention, and thus may be changed depending on the user, the intention of the operator, customs, and the like. Therefore, the definition of this term should be based on the contents of this specification as a whole.

FIG. 1 is a schematic block diagram of an integrated control system according to an embodiment of the present invention, and FIG. 2 is a block diagram illustrating an internal configuration of an integrated control system according to an embodiment of the present invention.

Referring to the drawings, the integrated control system 100 according to the present invention includes at least three RTLS beacons 10 disposed at different positions in a room and simultaneously outputting an RF signal and an ultrasonic signal, A plurality of listeners 20 for receiving an RF signal and an ultrasonic signal from at least one RTLS beacon 10 and calculating location information of the object by triangulation; An RTLS server 30 that receives the RTLS beacon 10 and maps the location of the object to which the RTLS beacon 10 is attached and provides it to the object and informs the object or outside when the location of the object enters the dangerous area or the secure area according to a predetermined condition, An object terminal 40 having the object and receiving the mapped location information from the RTLS server 30 and providing the mapped location information to the user and an interface between the listener 20 and the RTLS server 30 And a repeater 50 for repeating the process.

Here, the RTLS beacon 10 is fixedly installed in the indoor space for calculating the position information of the listener 20 to be uniformly spaced to some extent. Generally, four rooms are provided on the sides of each corner if the room is a square If the area is wide, four each can be added to the center of each side.

The location and number of the RTLS beacons 10 can be changed according to the area and the shape of the room, and the reliability of the calculation of the indoor location information can be improved by selecting the appropriate number and location.

And may be configured to be driven by receiving power from a repeater 50, which will be described later, if necessary.

The RTLS beacon 10 includes an RF transmitting unit 11 for transmitting an RF signal including unique identification information and coordinate information, an ultrasonic transmitting unit 12 for transmitting an ultrasonic signal, And a beacon control unit (13) for transmitting an RF signal and an ultrasonic signal through the unit (11) and the ultrasonic transmission unit (12).

The beacon control unit 13 determines the order of the RTLS beacons 10 in advance in order to transmit the signals according to the predetermined order. For example, the RTLS beacon 10 is transmitted first, and after 0.25 seconds, The RTLS beacon 10 transmits the RTLS beacon 10, and the RTLS beacon 10 transmits the RTLS beacon 10 after 0.25 seconds therefrom.

The signal transmission of the RF transmission unit 11 and the ultrasonic transmission unit 12 of the first RTLS beacon 10 is not limited to the setting of the request signal of the listener 20 . ≪ / RTI >

That is, even if the listener 20 is not located indoors or the listener 20 does not want to know the location information, if the number of RTLS beacons 10 continues to transmit signal information, it would be a waste of electric power. When the RTLS beacon 10 sends a transmission request to the RTLS beacons 10 for location information calculation, the plurality of RTLS beacons 10 sequentially transmit signals in a predetermined order.

The listener 20 is attached to the object and receives the RF signal and the ultrasonic signal from the at least three RTLS beacons 10 and calculates the position information of the object by the triangulation method. An RF receiving unit 21 for receiving RF signals from the at least three RTLS beacons 10, an ultrasonic receiving unit 22 for receiving ultrasonic signals from the at least three RTLS beacons 10, A timer unit 23 for measuring the time at which an ultrasonic signal is received by the ultrasonic reception unit 22 within a predetermined time from the start of reception of an RF signal to the RF reception unit 21; A control unit 24 that receives reception information from the ultrasonic receiving unit 22 and the timer unit 23 and calculates current position information of the listener 20 by the triangulation method, You made a location of 20 to the communication unit 25 to transmit to the RTLS server 30 via the repeater 50. The

The ultrasonic receiving unit 22 includes an ultrasonic sensor unit 221 for receiving an ultrasonic signal, an amplification unit 222 for amplifying the ultrasonic signal received from the ultrasonic sensor unit 221, A high frequency removing unit 223 for removing a high frequency component of a specific frequency or more of the ultrasonic signal amplified from the high frequency excitation unit 223 and a comparator unit 224 for converting an ultrasonic signal from which the high frequency component is removed from the high frequency excitation unit 223 into a digital signal .

The timer unit 23 is provided to generate time information from when the RF signal is received to when the ultrasonic wave is received. The RTLS beacon 10 selects a specific RTLS beacon 10 It is necessary to specify only the ultrasonic signals received within a predetermined time, for example 0.001 second to 0.1 second, from the time of receiving the RF signal of the RTLS beacon 10 by using the ultrasonic signal of the RTLS beacon 10.

Accordingly, the timer unit 23 generates reception time information of the ultrasonic signal for each RTLS beacon 10 and transmits it to the control unit 24.

The control unit 24 receives reception information from the RF receiving unit 21, the ultrasonic receiving unit 22 and the timer unit 23 and calculates distance information between each RTLS beacon 10 and the listener 20 And when three or more RTLS beacons 10 and the distance information of the listener 20 are calculated, the current position information of the listener 20 is calculated by the triangulation method.

To this end, the control unit 24 includes a first control unit 241 for confirming whether an RF signal is received from the RF receiving unit 21 and receiving an RF signal from the RF receiving unit 21 when the RF signal is received, 1 control unit 241 and receives the reception information from the ultrasonic reception unit 22 and the timer unit 23 to calculate the distance to each RTLS beacon 10 and the position information of the listener by the triangulation method And a second control section 242 for calculating the second control signal.

A method of calculating the distance from the timer unit 23 through the ultrasonic reception time information will be briefly described.

In estimating the distance between the listener 20 and the RTLS beacon 10

Distance = speed × time

The distance between the listener 20 and the RTLS beacon 10 is estimated.

Here, the time means the arrival time difference between the RF signal and the ultrasonic signal.

The speed of the RF signal is 3 x 10 ⁸ m / s, whereas the speed of the ultrasonic wave is about 344 m / s. Therefore, since the RF signal has a speed much faster than that of the ultrasonic wave, the arrival between the listener 20 and the RTLS beacon 10 The time difference is calculated using the following equation (1).

[Equation 1]

Difference in arrival time = (distance / ultrasonic velocity) - (velocity of distance / RF signal)

Here, the distance represents the distance between the listener and the RTLS beacon.

Since the velocity of the RF signal is 3 x 10 ⁸ m / s and the velocity value of the distance / RF signal in Equation 1 is negligibly small, the distance between the listener to be estimated and the RTLS beacon is given by Equation 2 . ≪ / RTI >

&Quot; (2) "

Distance = difference in arrival time × speed of ultrasonic wave

Therefore, the distance information between each of the listeners 20 and the RTLS beacon 10 is calculated by Equation (2). When at least three pieces of distance information are calculated, the control unit 24 compares the distance between the listener 20 and the RTLS beacon 10 by triangulation. Can be calculated.

That is, since the RTLS beacon 10 is located at a fixed position, three circles having a radius corresponding to the distance value are generated according to the distance between the three RTLS beacons 10 and the listener 20 according to the triangulation method. The intersection is the position information of the listener 20.

In addition, the control unit 24 is configured to transmit the calculated position information of the listener 20 to the RTLS server 30 as described above. Alternatively, the control unit 24 may attach the listener 20 to the RTLS server 30 through a separate display unit To the user or to the object terminal 40 located remotely via the communication unit 25. [

Here, the communication unit 25 preferably transmits data to the repeater 50 in a Bluetooth manner.

Meanwhile, the object terminal 40 is provided to receive the location information mapped from the RTLS server 30 by the object, that is, the user, and to provide the mapped location information to the user through the display means. When the object enters the dangerous area or the security zone in addition to the location information, the RTLS server 30 receives a warning message.

The form of the warning message can be variously configured in the RTLS server 30, such as an ARS type wireless communication method, a single text message, or an SNS message.

In addition, it is a matter of course that a separate map application is installed in the object terminal 40 to output the location information transmitted from the RTLS server 30 to the user.

The relay 50 is provided to relay between the listener 20 and the RTLS server 30. The listener 20 and the repeater 50 are connected to each other so that the listener 20 and the relay 50 can perform Bluetooth communication (BLE communication) The Bluetooth communication module must be installed in each of the Bluetooth communication modules 50.

In addition, the repeater 50 transmits and receives data to / from the RTLS server 30 through TCP / IP or UDP communication.

3 is a configuration diagram of an integrated control system according to another embodiment of the present invention.

The integrated control system 100 according to the present embodiment detects the location information of the aged elderly person and judges the situation as an emergency when there is no change in the location information for a predetermined time and transmits the information to the connected external server, So that the user can respond quickly.

The configuration according to the present embodiment includes an external server in addition to the above-described configuration. For example, an external server may be a firefighter server 60 corresponding to an emergency situation or a person living alone An administrative institution server 70, and the like.

Accordingly, if the location information change of the corresponding object is not generated for a predetermined time, it is determined as an emergency, and the corresponding state information is transmitted to the firefighter server 60 and the administrative server 70.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

10: RTLS beacon 20: Listener
30: RTLS server 40: object terminal
50: repeater 100: indoor positioning system

Claims (5)

At least three RTLS beacons (10) disposed at different positions in the room and simultaneously outputting an RF signal and an ultrasonic signal;
A plurality of listeners (20) attached to an object and receiving RF signals and ultrasonic signals from the at least three RTLS beacons (10), respectively, and calculating position information of the object by triangulation;
Receives the location information of the object from the plurality of the listeners 20, maps the location of the object to which the RTLS beacon 10 is attached to the object, and provides the object to the object. And an RTLS server (30) for notifying an object or an outside of the RTLS server (30) when entering the RTLS server (30).
The method according to claim 1,
Further comprising an object terminal (40) having the object and receiving the mapped location information from the RTLS server (30) and providing the mapped location information to a user,
The object terminal (40) receives a warning message from the RTLS server (30) when the object enters into a dangerous area or a security zone in addition to the location information.
The method according to claim 1,
The at least three RTLS beacons (10) are configured to output an RF signal and an ultrasonic signal sequentially in a predetermined order within a predetermined time,
The plurality of listeners 20 include an RF receiving unit 21 for receiving an RF signal from the at least three RTLS beacons 10 and an RF receiving unit 21 for receiving an ultrasonic signal from the at least three RTLS beacons 10. [ A timer unit 23 for measuring the time at which an ultrasonic signal is received by the ultrasonic reception unit 22 within a predetermined time from the start of reception of an RF signal to the RF receiving unit 21, And a control unit 24 that receives reception information from the receiving unit 21, the ultrasonic receiving unit 22 and the timer unit 23 and calculates the current position information of the listener 20 by the triangulation method RTLS-based real-time safety, security and location tracking integrated control system.
The method of claim 3,
Further comprising a repeater (50) for relaying between the listener (20) and the RTLS server (30)
The listener 20 further includes a Bluetooth communication unit 25 for communicating with the repeater 50. The repeater 50 transmits and receives data to and from the Bluetooth communication unit 25 via the Bluetooth communication unit 25, And transmits / receives data to / from the server (30) through TCP / IP or UDP communication.
The method according to claim 1,
The RTLS server (30)
When the change of the location information of the object is not performed for a predetermined time, notifies the external server corresponding to the emergency situation, the RTLS-based real-time safety, security and location tracking control system.

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