KR20110090245A - Urgency rescue system and method of detecting location of target - Google Patents

Abstract

PURPOSE: An emergency rescue system and a method for detecting position are provided to transmit an emergency rescue signal to a terminal in remote site within constant distance from the terminal using a zigbee module even in case a rescue request person does not possess the terminal. CONSTITUTION: A zigbee module generates a rescue request signal. A terminal receives the rescue request signal and sends to a central control chamber using conventional communications network. The central control chamber receives the rescue request signal and detects a broad area location using the location of the terminal and dispatches a rescue team. The rescue team moves to the broad area location and detects the location of the zigbee module by directly receiving the rescue request signal generated from the zigbee module.

Description

URGENCY RESCUE SYSTEM AND METHOD OF DETECTING LOCATION OF TARGET}

The present invention relates to an emergency rescue system and a location detection method in the emergency rescue system to quickly and accurately detect the location of the rescue requester in the emergency rescue system and to quickly reach the rescue requester to cope with the emergency situation.

Location-based emergency rescue system refers to a series of services that generate an emergency rescue signal from an emergency patient or a person in need of an emergency rescue when an emergency situation occurs and the emergency response team receives and handles the emergency. However, in order to satisfy these services, location technology is required to ensure the reliability of the generation, transmission and reception of emergency signals and the accuracy of signal generation locations.

However, current commercial positioning technology has a large error range from tens of meters to several kilometers. When using a GPS that tracks a location using satellite signals, the error can be reduced to within a few meters.However, GPS-based positioning technology cannot be used indoors, so complex terrain or indoors where many tall buildings do not reach GPS signals. In case of reliability there is a problem.

Accordingly, in order to provide a faster and more accurate location-based service, it is necessary to develop an active emergency rescue system and a location detection method capable of accurately detecting a location of a target point within a wide error radius.

Embodiments of the present invention for solving the above problems are to provide an emergency rescue system and a location detection method in the emergency rescue system that can accurately and quickly detect the location of the rescue requester.

The present invention also provides an emergency rescue system and a position detection method capable of maintaining a long time communication state by transmitting an emergency rescue signal using a ZigBee module having high power efficiency.

Another object of the present invention is to provide an emergency rescue system and a location detection method capable of directly detecting a location of a rescue requester at a rescue team.

According to embodiments of the present invention for achieving the above object of the present invention, using a Zigbee module, a rescue requester can easily and quickly generate an emergency rescue signal in an emergency situation, and a signal broadcast from the Zigbee module in the rescue team An emergency rescue system is disclosed that can accurately and quickly detect the location of a rescue requester. The emergency rescue system includes a ZigBee module which is provided by the rescue requester and generates an emergency rescue signal, a terminal receiving the emergency rescue signal and transmitting emergency rescue signal information to a central control room using a normal communication network. When the emergency rescue signal information is transmitted from a terminal, the central control room detects a wide area position at a location of the corresponding terminal and moves to the wide area location to directly receive the emergency rescue signal generated from the Zigbee module. It can be configured to include a rescue team to detect the position of the Zigbee module.

Here, the Zigbee module is configured to continuously broadcast the emergency rescue signal after initially transmitting the emergency rescue signal to the terminal.

In an embodiment, the terminal has an operation of detecting an error of the emergency rescue signal through a cyclic redundancy check (CRC) according to an Automatic Repeat Request (ARQ) protocol. When an error of the emergency rescue signal is detected at the terminal, a negative acknowledgment (NAK) signal is transmitted to the Zigbee module to receive an emergency rescue signal without an error. When the emergency rescue signal has no error, the Zigbee module transmits an acknowledgment signal and transmits the emergency rescue signal information to the central control room using a normal communication network.

For example, the rescue team may include a map display unit for confirming the location of the rescue requester by comparing the strength of the emergency rescue signal received at the wide area location.

The ZigBee module can be easily carried by the rescue requester, can always be carried, and can be carried in a location with good access for easy operation in an emergency situation. For example, the Zigbee module may have a detachable form to be carried by the rescue requester or may be embedded in the belongings of the rescue requester.

On the other hand, according to another embodiment of the present invention for achieving the above object of the present invention, the method for detecting the location of the rescue requester in the emergency rescue system, the rescue requester using the Zigbee module to generate an emergency rescue signal, Receiving the emergency rescue signal in the terminal and transmitting the emergency rescue signal information using the existing communication network, Detecting the global location through the location of the terminal that delivered the information, Rescue team is moved to the detected wide area location Receiving, by the rescue team, the emergency rescue signal at the wide-area position, detecting a candidate region having a strength of the received emergency rescue signal greater than a preset reference value, and determining the range of the candidate region and the preset reference region. Comparing the ranges and determining a target location that is the location of the rescue requester. There.

Here, after transmitting the emergency rescue signal to the terminal, the Zigbee module continuously broadcasts the emergency rescue signal until the rescue requester is rescued. In addition, the rescue team can directly and accurately detect the location of the rescue requester by directly receiving an emergency rescue signal broadcast from the Zigbee module at a wide area location. In addition, the emergency signal generation step, the rescue requester is operable to transmit the emergency signal to the terminal that is carried or located within a certain range from the Zigbee module.

The comparing of the ranges may include: moving to a new position, receiving the emergency rescue signal, and detecting the candidate region if the range of the candidate region is greater than the range of the reference region; If the range of the region is smaller than the range of the reference region, the location may be determined that the rescue requester is present in the candidate region. If the range of the candidate area is greater than the range of the reference area, the method may include detecting an intersection area where the candidate area detected before the movement and the candidate area detected after the movement intersect. Here, the movement position may be predicted to be located in the direction in which the strength of the received emergency rescue signal is the greatest.

In addition, the terminal is provided with a step of detecting an error of the emergency signal. The error detecting step may include determining an error of the emergency rescue signal and transmitting a negative acknowledgment (NAK) signal to the Zigbee module when the emergency rescue signal is determined to be an error. And transmitting an acknowledgment (ACK) signal to the Zigbee module when it is determined that the emergency rescue signal is not an error. Here, in the error detection step, if it is determined that the emergency rescue signal is not an error may include the step of transmitting a response character to the Zigbee module and confirming the identification information of the Zigbee module.

As described above, according to the embodiments of the present invention, even when the rescue requester does not have a terminal, the emergency rescue signal may be transmitted to the terminal at a remote location within a certain distance.

In addition, since the rescue requester may generate an emergency rescue signal even when the GPS-based service is provided in a place such as indoors, there is no restriction in using the Zigbee module.

In addition, the ZigBee module has a packet structure suitable for transmitting an emergency rescue signal, and has a high power efficiency, thereby maintaining a communication state for a long time, thereby effectively generating an emergency rescue signal.

In addition, since the rescue team directly detects the location of the rescue requester by directly receiving the emergency signal generated from the Zigbee module, the rescue team can quickly and accurately detect the location of the rescue requester and can effectively respond to the emergency rescue situation.

In addition, the Zigbee module can be easily carried by the rescue requester and can be mounted on the rescue requester's belongings, thereby improving aesthetics.

1 is a schematic diagram of an emergency rescue system according to an embodiment of the present invention;
2 is a block diagram for explaining the operation of the emergency rescue system of FIG.
3 is a block diagram illustrating an error detection operation of an emergency rescue signal in the emergency rescue system of FIG. 1;
4 is a flowchart illustrating a position detection method in the emergency rescue system according to an embodiment of the present invention;
FIG. 5 is a flowchart for explaining an error detection method of an emergency rescue signal in FIG. 4; FIG.
6 is a view for explaining a position detection method in the emergency rescue system according to an embodiment of the present invention, the map display unit showing the reception strength of the emergency rescue signal in the first position;
7 is a reception intensity panorama showing the signal strength with respect to the azimuth of the received emergency rescue signal;
FIG. 8 is a map display showing reception strength of emergency rescue signals in first to third positions; FIG.
9 is a reception intensity panorama of the emergency rescue signal in the first to third positions.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to or limited by the embodiments. In describing the present invention, a detailed description of well-known functions or constructions may be omitted for clarity of the present invention.

Hereinafter, an example of an emergency rescue system according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3. For reference, Figure 1 is a schematic diagram of an emergency rescue system according to an embodiment of the present invention, Figure 2 is a block diagram for explaining the operation of the emergency rescue system of Figure 1, Figure 3 is an emergency rescue system of Figure 1 It is a block diagram for explaining the error detection operation of a rescue signal.

The emergency rescue system may include a Zigbee module 100, a terminal 200, a central control room 300, and a rescue team 400.

The ZigBee module 100 is a portable device provided by the rescue requester and generates a signal of a predetermined frequency band so that the rescue requester can generate an emergency rescue signal in an emergency situation. In addition, the Zigbee module 100 is a communication module capable of short-range communication, and may transmit an emergency rescue signal to the terminal 200 located in the short distance from the rescue requester carrying or the rescue requester (S1).

In addition, the ZigBee module 100 has a form that the rescue requester can carry in a convenient position so that it can be easily carried in normal but easily operated in an emergency situation. For example, the Zigbee module 100 may be formed in a small size and may have a form that can be attached or detached to a garment or a bag of a rescue requester. Alternatively, the Zigbee module 100 may have a form embedded in an article (eg, accessories such as glasses, watches, necklaces, earrings, etc.) that the rescue requester can always carry.

Here, the Zigbee module 100 may transmit a signal in a low rate personal area network operating at 868 MHz, 902 to 928 MHz, and 2.4 GHz, and communicate with the Zigbee module 100. (A1) is able to communicate with peripherals which are typically at a distance of 250-500m. In addition, since the ZigBee module 100 is simple to operate, the rescue requester may generate an emergency rescue signal through a simple operation (for example, an action of operating a button or a switch) in an emergency situation, and the terminal 200 Emergency rescue signals can be generated without manipulation. In addition, since the Zigbee module 100 is capable of short-range communication, even if the rescue requester is not carrying the terminal 200, the rescue requester may transmit an emergency rescue signal to the terminal 200 within a predetermined distance. It is possible to generate and transmit emergency rescue signals at remote locations, even in emergency situations where access and manipulation are not possible.

In addition, the ZigBee module 100 has a structure suitable for transmitting an emergency signal, and has a high power efficiency, so that the Zigbee module 100 can maintain a communication state for a long time, thereby effectively generating an emergency rescue signal. In particular, since the emergency rescue signal does not require a large amount of data, it can be configured as a short packet, the ZigBee module 100 can reduce the amount of power when transmitting the emergency rescue signal, it is possible to send a signal for a long time, intermittently and quickly Transmission is possible.

The emergency rescue signal transmitted from the Zigbee module 100 is information on whether an emergency rescue signal is generated in the central control room 300 by using the normal communication network 201 in the terminal 200 (hereinafter, 'emergency rescue signal information'). Is transmitted). Here, the 'terminal 200' is a portable electronic device such as a mobile phone, a personal digital assistant (PDA), a smart phone, a handheld PC, and the like, and includes a code division multiplexing access (CDMA) module or a wired / wireless LAN card. Including a predetermined radio wave transmission and reception module includes a device capable of long-range wireless communication. The emergency signal information may include information such as time, device information of the terminal 200, and device information of the Zigbee module 100 received by the Zigbee module 100 as well as information on whether the emergency signal is received. Can be. In addition, the communication network 201 may include a general wireless communication network such as a general mobile communication network or a repeater.

Meanwhile, the terminal 200 detects an error of the received emergency rescue signal and transmits emergency rescue signal information to the central control room 300 using the communication network 201 when there is no error in the emergency rescue signal.

In detail, as shown in FIGS. 3 and 5, when the Zigbee module 100 transmits an emergency rescue signal (T1), the terminal 200 may detect an error of the emergency rescue signal. In this case, the emergency rescue signal is transmitted in a packet encoded by Cyclic Redundancy Checking (CRC) to determine whether an error occurs in the signal, and the terminal 200 transmits an Automatic Repeat Request (ARQ) protocol. According to the error can be detected in the CRC coded emergency rescue signal.

When no error is detected in the emergency rescue signal, the terminal 200 transmits an acknowledgment (ACK, acknowledge) signal to the Zigbee module 100 (T2) and is no longer urgent from the Zigbee module 100 to the terminal 200. Do not transmit distress signals. In this case, when the Zigbee module 100 receives the ACK signal from the terminal 200, the Zigbee module 100 continuously broadcasts an emergency rescue signal so that the position of the Zigbee module 100 can be detected by the rescue team 400. On the contrary, if an error is detected in the emergency rescue signal, the terminal 200 transmits a negative acknowledgment (NAK) signal indicating that the error is detected to the Zigbee module 100 (T3), The Zigbee module 100 receiving the NAK signal continuously transmits the emergency rescue signal to the terminal 200 until the ACK signal is received (T4).

Here, the emergency rescue signal includes identification information which is unique data for identification and confirmation of the Zigbee module 100. The terminal 200 confirms the Zigbee module 100 through the received emergency rescue signal. For example, the Zigbee module 100 and the terminal 200 may be initially configured in a pair, and the identification information may be a unique number of the terminal 200. That is, the terminal 200 receiving the emergency rescue signal confirms whether the designated Zigbee module 100 is a pair through the identification information, and transmits the emergency rescue signal information to the central control room using the communication network 201.

When the emergency rescue signal information is transmitted from the terminal 200, the central control room 300 detects the location of the rescue requester through the location of the terminal 200 and dispatches a rescue team. Here, although the detailed position of the rescue requester cannot be detected from the emergency rescue signal information transmitted from the terminal 200, the terminal (not shown) in the repeater or base station configuring the mobile communication network used by the terminal 200 to transmit the emergency rescue signal information. The approximate location of 200) can be seen. In this regard, the central control room 300 may obtain the location information of the terminal 200 from the communication network and detect the wide area location A2 in which the rescue requester may exist in consideration of the range in which the terminal 200 may communicate with the terminal 200.

Here, since the central control room 300 detects the global location A2 from the location information of the terminal 200, the central control room 300 may detect the global location A2 for location tracking without GPS. In the case of GPS, there is a problem in reliability in a complex terrain or a mountainous terrain that cannot be used indoors and there are many high-rise buildings. However, since GPS detects a wide area location (A2) using the terminal 200 and a general communication network without GPS, The wide area position A2 can be detected with high reliability even in the region.

The rescue team 400 includes manpower and equipment that is input to move to the detected wide area location A2 at the request of the central control room 300 to rescue the rescue requester. Here, the rescue team 400 may move by selecting the shortest and optimal path that can be quickly moved from the position of the rescue team 400 to the wide-area position A2.

The rescue team 400 receives the emergency rescue signal S2 broadcasted by the Zigbee module 100 after arriving at the wide-area position A2 to detect the position of the Zigbee module 100. That is, the first one emergency rescue signal S1 in the Zigbee module 100 is transmitted to the terminal 200 to inform the central control room 300 that the emergency rescue situation is necessary, and the emergency rescue signal S2 after the successful transmission. ) Is continuously broadcast. In addition, the rescue team 400 may directly detect the position of the Zigbee module 100 by directly receiving the emergency rescue signal S2 continuously broadcast in the Zigbee module 100.

In order to receive the emergency rescue signal and detect the position of the Zigbee module 100, the rescue team 400 detects the position of the Zigbee module 100 and uses the received strength of the emergency rescue signal transmitted from the Zigbee module 100. A map display unit 410 (see FIGS. 6 and 8) may be provided to detect a moving path of the. In addition, the rescue team 400 may move to a wide-area position A2 and search for an optimum movement path for moving to the position of the Zigbee module 100 within the wide-area position A2 (not shown). It may be provided. However, the rescue team 400 and the map display unit 410 of the present invention are not limited by the drawings, and the rescue team 400 may include substantially various means for receiving a signal and detecting a location of the rescue requester. .

Hereinafter, a method of detecting a location of a rescue requester in an emergency rescue system according to an embodiment of the present invention will be described in detail with reference to FIGS. 4 to 9. For reference, FIG. 4 is a flowchart illustrating a location detection method in an emergency rescue system according to an embodiment of the present invention, and FIG. 5 is a flowchart illustrating an error detection method of an emergency rescue signal in FIG. 4. FIG. 6 is a view for explaining the position detection method of FIG. 4, which is a map display unit showing a reception strength of an emergency rescue signal at a first position, and FIG. 7 is an azimuth angle of the emergency rescue signal received at a first position. Receive intensity panorama showing signal strength 8 is a map display unit showing the reception strength of the emergency rescue signals in the first to third positions, and FIG. 9 is a reception intensity panorama of the emergency rescue signals in the first to third positions.

When the emergency situation occurs, the rescue requester operates the Zigbee module 100 to generate an emergency rescue signal (S111). Here, the first emergency signal is transmitted to the terminal 200, and then the emergency signal is continuously broadcast in the Zigbee module 100. Here, the term 'continuous' includes not only continuously transmitting a signal but also intermittently transmitting a signal at predetermined time intervals, and emergency rescue until the rescue team 400 locates the rescue requester and rescues the rescue requester. It means broadcasting a signal.

Next, the terminal 200 present in the communication area with the Zigbee module 100 receives the emergency rescue signal transmitted from the Zigbee module 100, detects an error of the received emergency rescue signal, and if there is no error, the central control room Emergency rescue signal information is transmitted to 300 (S112).

In this case, when the terminal 200 receives the emergency rescue signal from the terminal 200 as illustrated in FIG. 5 to detect an error of the received emergency rescue signal (S211), the emergency rescue is CRC coded according to the ARQ protocol. An error of the signal is detected (S212). If no error occurs, the ACK signal is transmitted to the ZigBee module 100 (S214), and if the identification information data included in the emergency rescue signal is determined to match, the central control room using a normal communication network is matched. Emergency rescue signal information is transmitted to 300 (S112). If the identification information data does not match, the terminal 200 may ignore the emergency rescue signal and terminate the communication. When an error occurs in the received emergency rescue signal, the NAK signal is transmitted to the Zigbee module 100 (S213), and the Zigbee module 100 receiving the NAK signal retransmits the emergency rescue signal. In addition, the terminal 200 receives the emergency rescue signal retransmitted as described above (S211) and repeats the process of detecting the error (S212) while receiving the emergency rescue signal without an error.

Next, the central control room 300 confirms that emergency rescue signal information has been transmitted from the terminal 200 (S113), and acquires the position of the terminal 200 from a repeater or a base station, and the terminal 200 and the Zigbee module ( In consideration of the communication range 100, the wide area location A2 of the rescue requester may be detected (S114).

Next, the central control room 300 transmits the emergency rescue signal generation to the rescue team 400 and transmits the wide area location (A2) information detected from the location of the terminal 200, the rescue team 400 is a wide area location (A2) To move to (S115).

Next, the rescue team 400 moved to the wide area location A2 directly receives the emergency rescue signal S2 that the Zigbee module 100 continuously broadcasts (S116), that is, the location of the Zigbee module 100. The location of the requestor (hereinafter referred to as the 'target location T') is detected. Here, since the strength of the emergency rescue signal transmitted directly from the Zigbee module 100 appears to be the largest, the rescue team 400 expects the Zigbee module 100 to be located at the position where the strength of the received emergency rescue signal is strongest. The location of the requestor can be detected.

The rescue team 400 may include a map display unit 410 to show the location of the rescue team 400 and to detect the location of the rescue requester. For example, the map display unit 410 may display information such as terrain and structure of the wide area location A2 and map data for showing the location of the rescue team 400 within the wide area location A2. It may include a display device for showing the rescue team 400 as image information. In addition, the map display unit 410 may show the result of analyzing the emergency rescue signal received from the rescue team 400 overlapping the map data. In addition, the map display unit 410 may be connected to an information system that enables the rescue team 400 to search for an optimum movement path for moving in the wide area location A2 and moving to the target location T.

Next, in order to detect the position of the Zigbee module 100 using the received emergency signal strength, a signal strength panorama of the received emergency signal is created (S117).

In addition to the signal directly transmitted from the Zigbee module 100, the emergency rescue signal received from the rescue team 400 may receive signals having different sizes in different directions as the emergency rescue signal is reflected and scattered by buildings or surrounding structures. Can be. Here, the rescue team 400 receives a signal from all directions 360 ° around the position of the rescue team 400 to detect the position and the direction of the Zigbee module 100 and creates an intensity panorama of the received signal according to the azimuth angle. Here, the reception strength of the emergency rescue signal received from the rescue team 400 has a wavelength form that changes in magnitude depending on the azimuth angle due to reflection and scattering of the emergency rescue signal.

On the other hand, the emergency rescue signal transmitted directly from the Zigbee module 100 has a large reception strength, so it is possible that the emergency rescue signal received from the rescue team 400 is a signal transmitted from the Zigbee module 100 only when the predetermined value is greater than or equal to a predetermined value. You can judge. That is, in the reception intensity panorama, the directions and areas in which the reception intensity is larger than a predetermined reference value become candidate areas C1, C2, and C3 predicted that the target position T exists. The candidate regions C1, C2, and C3 have a substantially fan shape having the vertex as the first position R1, which is the current position of the rescue team 400. In addition, the map display unit 410 displays the candidate areas C1, C2, and C3 detected in the reception intensity panorama.

Meanwhile, although the number of candidate regions C1, C2, and C3 is illustrated in the figure, the present invention is not limited by the drawings, and the number of candidate regions C1, C2, and C3 is substantially larger than the reference value in the signal intensity panorama. Since it corresponds to the number of areas having a size, it is not limited by the drawings.

Next, it is determined whether the sizes of the candidate regions C1, C2, and C3 detected as described above are within an allowable error range for position detection. That is, the sizes of the candidate areas C1, C2, and C3 are compared with the size of the reference area for the tolerance (S119).

If the size of the candidate regions C1, C2, C3 is smaller than the size of the reference region, it means that the target position T is included in the candidate regions C1, C2, C3, and the candidate regions C1, C2, C3. In step S124, the target position T may be determined that the rescue requester is located at the portion where the strength of the received signal is greatest.

However, since there are structures such as buildings, trees, and automobiles in the wide-area location A2, signals are scattered, reflected, and interfered by the surrounding environment, so that the rescue team 400 is applied to the received signal panorama created at the first location R1. As a result, it can be said that it is substantially difficult to determine the target position T at one time.

That is, when the sizes of the candidate areas C1, C2, and C3 are larger than the size of the reference area, the rescue team 400 moves to another location to receive the emergency rescue signal, creates a reception intensity panorama, and sets the target position T. The work to confirm must be repeated a number of times.

The position where the rescue team 400 will move to receive the emergency rescue signal (hereinafter, referred to as a "movement candidate position") for the determination of the target position T calculates the necessary cost when the rescue team 400 moves and is the minimum cost position. It may be detected (S120).

Here, the moving candidate position is located on the path where the rescue team 400 can move substantially at the position (R1) where the current rescue team 400 is located, and can change the dynamic path of the rescue team 400 such as a crossroad or an intersection. Points. In addition, the movement candidate position is determined as a position that can be moved to the shortest distance from the current position (R1) as quickly as possible, and is affected by road conditions and regional influences in the wide-area position (A2). Since the position that can satisfy these conditions is determined as the movement candidate position, the number of candidate movement positions that can be set in the wide-area position A2 will be substantially limited.

Next, the cost required to move to the movement candidate position detected from the current position of the rescue team 400 is calculated (S121), and the position where the calculated cost is minimum (hereinafter referred to as 'moving position') is determined and the moving position The movement route for moving to is determined (S122).

Next, by moving to the determined movement position through the determined movement route (S123), receiving the emergency rescue signal at the movement position as described above (S116) and creating a reception intensity panorama of the received emergency rescue signal (S117). In step S118, candidate regions are detected by detecting regions having a signal size equal to or greater than a reference value.

As shown in FIG. 8, the candidate area detected at the movement position is also displayed on the map display unit 410, and the overlapping region S1, in which the candidate region detected at the movement position and the candidate region detected at the first position, overlap each other. S2, S3, ST) can be detected. The overlapping regions S1, S2, S3, and ST thus detected are set as new candidate regions.

The target position T can be determined by comparing the size of the candidate area set as described above with the size of the reference area (S119).

According to the present exemplary embodiment, the position detection method may determine the target position T by moving to a plurality of positions and repeatedly performing the above-described steps. That is, when the target position T is not confirmed, the next movement position having the minimum movement cost is determined and moved from the current position, and after repeating the steps for detecting the above-described candidate region at the movement position, a plurality of movements are performed. The overlapped overlapping regions S1, S2, S3, and ST of the candidate regions detected at the positions may be detected, and the candidates having the sizes of the overlapping regions of the candidate regions detected at the plurality of positions smaller than the size of the reference region may be detected. The area can be detected and the target position T can be determined.

As described above, the rescue team 400 directly receives the emergency rescue signal transmitted from the ZigBee module 100 in the wide area position A2 and quickly determines the location where the ZigBee module 100 exists through the strength of the received signal. Can be detected accurately.

In addition, since the rescue team 400 moves to the location with the shortest path and the least cost, the target location T can be detected and reached quickly, and the rescue requester can be quickly rescued.

As described above, the present invention has been described by specific embodiments such as specific components and the like, but the embodiments and the drawings are provided only to help a more general understanding of the present invention, and the present invention is limited to the above-described embodiments. In other words, various modifications and variations are possible to those skilled in the art to which the present invention pertains. Therefore, the spirit of the present invention should not be limited to the above-described embodiments, and all the things that are equivalent to or equivalent to the scope of the claims as well as the claims to be described later belong to the scope of the present invention.

100: Zigbee module 200: terminal
300: central control room 400: tracker
410: map display unit

Claims (13)

In the emergency rescue system for tracking the location of the rescue requester requesting an emergency rescue,
A ZigBee module provided by the rescue requester and generating an emergency rescue signal;
A terminal for receiving the emergency rescue signal and transmitting emergency rescue signal information to a central control room using a normal communication network;
A central control room that detects a wide area location by using the location of the terminal and dispatches a rescue team to the wide area location when the emergency rescue signal information is transmitted from the terminal; And
A rescue team that moves to the detected wide-area position and directly receives the emergency rescue signal generated by the Zigbee module at the wide-area position to detect the position of the Zigbee module;
Emergency rescue system comprising a. The method of claim 1,
The Zigbee module emergency broadcasting system for continuously broadcasting the emergency signal. The method of claim 1,
The terminal detects an error of the emergency rescue signal through a cyclic redundancy check (CRC) according to an Automatic Repeat Request (ARQ) protocol. The method of claim 1,
The rescue team includes a map display unit for confirming the location of the rescue requestor by comparing the strength of the emergency signal received in the wide area location. The method of claim 1,
The ZigBee module has a form that can be detached so that the rescue requester can carry or embedded in the belongings of the rescue requester. A location detection method for detecting a location of a rescue requester in an emergency rescue system,
A rescue requester generating an emergency rescue signal using a Zigbee module;
Receiving the emergency signal at the terminal and transmitting emergency signal information using a normal communication network;
Detecting a wide area location through a location of a terminal that has delivered the emergency rescue signal information;
Moving the rescue team to the detected global position;
The rescue team receiving an emergency rescue signal at the wide area location;
Detecting a candidate region in which the strength of the received emergency rescue signal is greater than a preset reference value;
Comparing a range of the candidate area with a range of a preset reference area; And
Determining a target position that is the location of the rescue requester;
Position detection method of the emergency rescue system comprising a. The method of claim 6,
And transmitting the emergency rescue signal to a terminal, the Zigbee module continuously broadcasts the emergency rescue signal until the rescue requester is rescued. The method of claim 7, wherein
The emergency rescue signal generation step of transmitting the emergency rescue signal to a terminal that the rescue requester is carried or spaced apart from the Zigbee module within a predetermined range. The method of claim 6,
Comparing the ranges,
If the range of the candidate area is greater than the range of the reference area, repeating moving to a new position, receiving the emergency rescue signal and detecting the candidate area;
And determining the location that the rescue requester exists in the candidate area if the range of the candidate area is smaller than that of the reference area. 10. The method of claim 9,
And detecting a crossing area where the candidate area detected before the movement and the candidate area detected after the movement cross each other when the range of the candidate area is greater than the range of the reference area. The method of claim 6,
And the moving position is located in a direction in which the strength of the received emergency rescue signal is greatest. The method of claim 6,
Detecting an error of the emergency rescue signal at the terminal;
The error detection step,
Determining an error of the emergency rescue signal;
Transmitting a negative acknowledgment (NAK) signal to the Zigbee module when the emergency rescue signal is determined to be an error; And
Transmitting an acknowledgment (ACK) signal to the Zigbee module when it is determined that the emergency rescue signal is not an error;
Position detection method of the emergency rescue system comprising a. The method of claim 12,
The error detection step further comprises the step of identifying the identification information of the Zigbee module.

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