KR20200000832A - System and method for detecting circumstances - Google Patents

Abstract

The present invention relates to a situation detecting system, which comprises an emergency induction lamp. The emergency induction lamp comprises: a vibration sensor and a barometric pressure sensor; a control module receiving information measured by the vibration sensor and the barometric pressure sensor, and determining a situation; a communication module for transmitting and receiving information measured by the vibration sensor and the barometric pressure sensor, and information on the situation determined by the control module with another emergency induction lamp; and an output module for outputting guidance information in accordance with the situation determined by the control module.

Description

STATUS DETECTION SYSTEM AND METHOD {SYSTEM AND METHOD FOR DETECTING CIRCUMSTANCES}

The present invention relates to a situation detection technology, and more particularly, the mutual information sharing between the terminal provided by the user or firefighters located in the building, such as emergency guidance provided in the building, and terminals provided by the field command and A situation detection system and method for predicting and detecting an overall situation occurring in a building through communication.

Accidents of firefighters occur frequently in disaster scenes such as fires, and accidents in the disaster scene cause great damage. However, in the event of an accident, there is still insufficient response. In other words, there is no way to communicate information about the accident that can be predicted in advance, or to share the information with all firefighters on the scene in the event of an emergency not to enter a hazardous area or to share it with each other. Actions are often delayed because the identity and location of the firefighters in question cannot be identified in real time.

In addition, the Fire Safety Management Regulations stipulate that on-site commanders must systematically manage and identify the number, location, and time of personnel assigned to the site and take this into account during on-site command activities. It is required to establish and maintain a safety management communication system to enable emergency communication with crews who are in danger due to unsuccessful accidents, so communication between fire fighters entering the building and external field commanders should be possible. In the event of a fire, it is virtually impossible to utilize the communications and power infrastructure in or around the building. Therefore, in order to enable stable activities of firefighters, communication with the outside and the development of positioning technology using the same are required.

Korean Patent Publication No. 10-2015-0134472

The purpose of the present invention is to enable the communication and location tracking with the outside of the building by utilizing the emergency induction, etc. installed in the building for the safety management of firefighters and citizens in the event of a fire, and to detect the situation to induce safe evacuation through the situation inside the building To provide a system and method

A first aspect of the present invention for achieving the above object, the situation detection system, including an emergency induction lamp, the emergency induction lamp, vibration sensor and barometric pressure sensor; A control module that receives information measured from the vibration sensor and the barometric pressure sensor to determine a situation; A communication module for transmitting / receiving information measured from the vibration sensor and the barometric pressure sensor and information on a situation determined by the control module with other emergency induction lamps; And an output module for outputting guide information according to the situation determined by the control module.

 Preferably, the control module may receive the vibration signal measured from the vibration sensor and monitor the amplitude of the vibration of the specific band.

 Preferably, when the amplitude exceeds a predetermined value, the control module determines that an emergency situation has occurred, and allows the information and location information on the emergency situation to be shared with other emergency inductions through the communication module. have.

Preferably, the control module, based on the information and location information on the shared emergency situation, determine the evacuation route to the emergency induction lamp located in the doorway part of the building, the emergency induction lamp located in the doorway part of the building The route between the information and the emergency guidance may be stored in advance.

Preferably, the control module, based on the information on the emergency situation and location information to set the weight on each path between the emergency induction, and the like, the emergency induction lamp located in the entrance of the building from its location using the set weight. Calculate the shortest evacuation route to the position of, but the weight of the path connected to the emergency induction lamp that detects the emergency situation according to the information on the emergency situation is set to infinity, the weight according to the distance of each path between the emergency induction lamp The additional weight value may be set according to the distance from the emergency induction lamp which detects the emergency situation.

Preferably, the control module, according to the determined evacuation path, it is possible to output the direction information for guiding the evacuation path through the output module.

Preferably, the first terminal for periodically communicating with the emergency induction lamp; And a second terminal periodically performing communication with the emergency induction lamp or the first terminal, wherein the emergency induction lamp is configured to enter and exit a first terminal based on signal strength according to periodic communication with the first terminal. It may determine whether or not, and transmits the information whether the building access or not, to the second terminal.

Preferably, the emergency induction, etc., periodically transmits an identifier, location information, and barometric pressure information to the first terminal, and when it is determined that an emergency occurred in the emergency induction, etc., the information on the emergency situation to the first terminal The first terminal may periodically transmit an identifier, status information, location information, and routing request information to the emergency guide.

Preferably, the first terminal estimates the location based on the identifier received from the emergency induction, location information, and barometric pressure information, and if it is determined that the distance to the emergency induction is within a specific distance, the emergency induction, etc. If the position is determined as the position of the first terminal and it is determined that the distance from the emergency induction lamp is not within a specific distance, the signal strength of the communication signal received from the emergency induction lamp, three or more emergency induction lamps receiving the communication signal, etc. The location of the first terminal may be determined according to the distance information between the two or the moving distance estimated by the walking estimation navigation method.

Preferably, when the first terminal cannot communicate with the second terminal, the first terminal transmits routing request information to another first terminal or an emergency induction, and so on, to the second terminal through the other first terminal or the emergency induction. Information can be delivered.

Preferably, when the first terminal transmits the routing request information to the emergency induction lamp, the emergency induction lamp performs routing of the message to the emergency induction lamp located in the building entrance and exit based on a weight between preset emergency induction lamps, and the building entrance and exit door. The emergency induction lamp located in may transmit the received message to the second terminal.

Preferably, the first terminal may be provided with a value measured from the barometric pressure sensor such as the emergency induction through the communication module to estimate the altitude.

Preferably, the second terminal may directly receive information about the first terminal from the first terminal, or may receive information about the first terminal through the emergency induction.

A second aspect of the present invention for achieving the above object is a situation detection method performed in an emergency induction, etc., comprising: (a) receiving information measured from a vibration sensor and a barometric pressure sensor; (b) determining whether an emergency situation occurs based on the vibration signal measured from the vibration sensor; (c) determining the evacuation route by sharing information about the emergency situation, information measured by the barometric pressure sensor, and location information with other emergency inductions, if it is determined that the emergency situation has occurred; And (d) outputting guide information based on the determined evacuation route.

Preferably, the step (b) may include receiving a vibration signal measured from the vibration sensor and monitoring an amplitude of vibration of a specific band; And determining that an emergency situation occurs when the amplitude exceeds a preset value.

Preferably, the step (c) comprises the step of determining the evacuation route to the emergency induction lamp located in the doorway part of the building based on the information and location information on the shared emergency situation, the doorway part of the building Information on emergency induction lamps located at and the route between emergency induction lamps may be stored in advance.

Preferably, the step (c) is to set a weight on each path between the emergency induction, etc. based on the information on the emergency situation and location information, and located at the entrance of the building from its location using the set weight. Comprising the step of calculating the shortest escape route to the location of the emergency induction light, the weight of the path connected to the emergency induction light detecting the emergency situation according to the information on the emergency situation is set to infinity, each path between the emergency induction light The weight may be set according to the distance, and the additional weight value may be set according to the distance from the emergency induction which detects the emergency situation.

Preferably, step (d) may include outputting direction information for guiding the shortest evacuation route.

As described above, according to the present invention, it is possible to predict the emergency situation through the emergency induction lamp installed in the building, and the continuous communication with the outside of the building is possible even in an emergency situation, and with the emergency induction lamp and the fireman or the terminal of the citizen located in the building. It is possible to track the location of firefighters or citizens through communication, and it is effective to guide the safe evacuation route to the entrance of the building by sharing information between each other such as emergency guidance. Therefore, it is possible to prevent the occurrence of an accident in advance or to lead to a larger accident and there is an effect capable of quick action in the event of an accident.

1 is a block diagram of a situation detection system according to a preferred embodiment of the present invention.
2 is a block diagram of an emergency induction lamp according to an embodiment.
3 is a block diagram of a first terminal according to an embodiment.
4 is a block diagram of a second terminal according to an embodiment.
5 is a block diagram of a server according to an exemplary embodiment.
6 is a flowchart illustrating a situation detection method according to an embodiment.
7 is a flowchart illustrating information transmission and reception between an emergency induction lamp, a first terminal, and a second terminal.
8 is an exemplary view for explaining a determination of an emergency according to an embodiment.
9 and 10 are exemplary diagrams for explaining the determination of the evacuation route according to an embodiment.
11 to 13 are diagrams for describing a position determination of a first terminal according to an embodiment.

Advantages and features of the present invention, and a method of achieving them will be apparent from the following detailed description with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout. “And / or” includes each and all combinations of one or more of the items mentioned.

Although the first, second, etc. are used to describe various elements, components and / or sections, these elements, components and / or sections are of course not limited by these terms. These terms are only used to distinguish one element, component or section from another element, component or section. Therefore, the first device, the first component, or the first section mentioned below may be a second device, a second component, or a second section within the technical spirit of the present invention.

In addition, in each step, an identification code (eg, a, b, c, etc.) is used for convenience of description, and the identification code does not describe the order of the steps, and each step is clearly specified in context. Unless stated in order, it may occur differently from the stated order. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprises” and / or “comprising” refers to the presence of one or more other components, steps, operations and / or elements. Or does not exclude additions.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. In addition, the terms defined in the commonly used dictionaries are not ideally or excessively interpreted unless they are specifically defined clearly.

In describing the embodiments of the present invention, when it is determined that a detailed description of a known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. The terms to be described below are terms defined in consideration of functions in the embodiments of the present invention, which may vary according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

1 is a block diagram of a situation detection system according to a preferred embodiment of the present invention.

Referring to FIG. 1, the situation detection system 100 includes an emergency induction lamp 110, a first terminal 120, a second terminal 130, and a server 140. Preferably, a plurality of emergency induction lamp 110 may be included, the mutual communication is possible, and the first terminal 120 and the second terminal 120 can be communicated. In addition, a plurality of first terminals 120 may be included, and mutual communication thereof may be possible, communication with the emergency induction lamp 110 and the second terminal 130 may be possible, and the second terminal 130 may be an emergency induction lamp 110. Communication with the first terminal 120 and the server 140.

Emergency induction light 110 is a device provided inside the building to predict the collapse of the building and emergency induction light 110 to share information between each other to guide the evacuation route in an emergency situation. Referring to FIG. 2, the emergency induction lamp 110 includes a vibration sensor 210, an air pressure sensor 220, a communication module 230, an output module 240, and a control module 250.

The vibration sensor 210 and the barometric pressure sensor 220 measure data on vibration and barometric pressure, respectively. Preferably, the emergency induction lamp 110 may further include a gas sensor although not shown in the drawing, and the gas sensor may detect a toxic gas.

The communication module 220 forms communication with the first terminal 120 and the second terminal 130 so that data transmission and reception can be performed. The communication module 220 may include various RF modules, and preferably, a long distance wireless communication module for forming communication between another emergency induction lamp, a first terminal 120 provided by a firefighter, and a second terminal 130. For example, it may include a Laura module, and a Bluetooth or Wi-Fi module for establishing communication with the first terminal 120 provided by the general citizen.

The output module 240 outputs information on a moving direction when guiding the evacuation route through the display.

The control module 250 controls the flow of all operations and data performed in the emergency induction lamp 110, and preferably, the data transmission / reception unit 251, the emergency situation determination unit 252, and the evacuation path determination unit 253. It includes. Operation performed by the control module 250 based on various data obtained through the vibration sensor 210, the barometric pressure sensor 220, and the communication module 230 will be described in more detail below.

In addition, the emergency induction lamp 110 may include a constant power source and a battery, so that the emergency power may be supplied through the battery. Preferably, the emergency induction lamp 110 supplies power by using the usual power at normal times and performs battery charging at the same time, and shuts off the regular power since it is impossible to use the constant power when an emergency situation such as fire or collapse occurs. The battery is used to perform the operation.

The first terminal 120 is a terminal provided by each firefighter or a general citizen input to the site to obtain the location information and status information and transmits to the emergency induction lamp 110 or the second terminal 130. Referring to FIG. 3, the first terminal 120 includes a communication module 210, a sensor module 320, a user interface 330, and a control module 340.

The communication module 310 forms communication with the emergency induction lamp 110 or the second terminal 130 so that data transmission and reception may be performed. Preferably, in the case of the first terminal provided by the firefighter, it may correspond to a LoRa RF module, and in the case of the first terminal (for example, a smartphone) provided by a general citizen, a Bluetooth or Wi-Fi module may be provided. This may be the case.

The sensor module 320 is configured of various sensors to obtain position information and state information of the first terminal 120. Preferably, the sensor module 320 includes a global positioning system (GPS), an inertial measurement unit (IMU), and an earth magnetic field sensor. Magnetometer, and a pressure sensor, and the IMU may include an accelerometer and a gyroscope.

The user interface 330 outputs information obtained from the first terminal 120 or information received from the emergency induction lamp 110 and other first and second terminals 130, and is configured to receive information from the user. The liquid crystal display may include a liquid crystal display (LCD), a light emitting diode (LED), a buzzer, and a button. Here, the LCD may output various information, and when the first terminal 120 is in a specific state or in an emergency state, the LED may emit light in various ways, and the buzzer may beep. In addition, a plurality of buttons may be configured, and an operation mode of the first terminal 120 may be determined according to which button is selected by the user. For example, the power of the first terminal 120 may be turned on / off according to the selection of a button, and the standby mode is set as the standby mode so that only the first terminal 120 and the second terminal 130 communicate with each other. And, it is set to the on-site input mode to communicate with the second terminal 130 and an alarm message for notifying that the emergency situation, etc. can be transmitted to another first terminal or the second terminal 130, Alternatively, the terminal may be set to a communication mode, so that communication with the second terminal 130 may be impossible, but communication with another first terminal may be performed. Such various mode settings may be determined by a button selected by a user, but may be automatically set according to the state of the first terminal 120. In addition, the user interface 330 may recognize whether the first terminal 120 is connected to the charging cradle which is separately provided or is being charged, or whether the charging is interrupted because the connection to the charging cradle is disconnected.

The control module 340 controls the flow of all operations and data performed in the first terminal 120, and includes a location information acquisition unit 341, a status information acquisition unit 342, and a data transmission unit 343. . Preferably, the location information acquisition unit 341 may be configured such that the location of the first terminal 120 and the first terminal 120 are indoors or outdoors based on data sensed by the GPS and the geomagnetic sensor of the sensor module 320. It is possible to determine whether there is, and to determine the altitude of the first terminal 120 based on the data sensed from the barometric pressure sensor. In addition, the location information acquisition unit 341 may determine whether the first terminal 120 is indoors or outdoors based on data sensed by the IMU and the geomagnetic field sensor. Preferably, the state information acquisition unit 342 may determine whether the first terminal 120 is in a floating state based on data sensed by the IMU and the geomagnetic field sensor of the sensor module 320.

The second terminal 130 is a terminal provided in the field command unit of the fire site, for example, may correspond to a tablet PC (Tablet PC). Preferably, the second terminal 130 monitors the situation inside the building based on the situation information received from the emergency induction lamp 110, and the location information of the first terminal 120 received from the first terminal 120 and The operation of the first terminal 120 may be monitored based on the state information, and all monitored information may be transmitted to the server 140. That is, the second terminal 130 functions as a gateway to the server 140. In addition, referring to FIG. 4, the second terminal 130 may include a communication module 410, a sensor module 420, a user interface 430, and a control module 440.

The communication module 410 forms communication with the emergency induction light 110, the first terminal 120, and the server 140 to perform data transmission and reception with the emergency induction light 110, the first terminal 120, and the server 140. To be possible. Preferably, the communication module 410 establishes communication with the first terminal 120 and the at least two Laura RF modules and the server 140 for stably forming a change in the communication protocol according to the type of spreading factor. It may include a 3G module or a Long Term Evolution (LTE) module.

The sensor module 420 is composed of various sensors for expressing the position of the first terminal 120 and obtaining state information of the second terminal 130, and preferably, may include a GPS and an IMU. Here, the GPS is provided to express the relative positions between the first terminals with respect to the position of the second terminal 130, the IMU is provided to find the direction of the second terminal 130. That is, when the relative positions between the first terminals are expressed based on the position of the second terminal 130 by GPS, the IMU of the second terminal 130 may correspond to the direction of the first terminals. 130) to rotate the screen.

The user interface 430 outputs information received from the first terminal 120 and information for monitoring the first terminal 120 and receives information from the user. Preferably, the user interface 430 is implemented as an LCD touch screen. Can be.

The control module 440 controls the flow of all operations and data performed in the second terminal 130, the data receiving unit 441, the monitoring unit 442, the emergency situation determining unit 443, and the data transmitting unit 444. ). Preferably, the monitoring unit 442 is based on the information received from the emergency induction lamp 110 or the first terminal 120 (for example, whether or not an emergency occurs) and the first terminal 120 in the building of the Operations (e.g., site input time, location movement, firefighter's status) can be monitored. Preferably, the emergency determination unit 443 determines whether the first terminal 120 is in an emergency situation (for example, a floating state) based on the location information and the status information of the first terminal 120. In case of an emergency, an alarm message may be generated and transmitted to another first terminal or all first terminals.

The server 140 is a device provided in the general situation room. The server 140 allocates a time slot for each first terminal 120 and receives and manages monitoring information about the first terminal 120 received from the second terminal 130. . Preferably, referring to FIG. 5, the server 140 may include a communication module 510, a user interface 520, and a control module 530.

The communication module 510 may establish communication with the second terminal 130 to perform data transmission and reception. Preferably, the communication module 510 may include a wired network (eg, Ethernet), an LTE module corresponding to an RF module, or a 3G module.

The user interface 520 outputs information received from the second terminal 130 and information on the first terminal 120 and the site situation managed based on the information, and receives various information from the user. Configuration.

The control module 530 controls the flow of all operations and data performed in the server 140, the data receiver 531, the time slot manager 532, the data manager 533, the emergency situation determination unit 534, And a command transmitter 535. Preferably, the timeslot manager 532 may manage information about timeslots used by the first terminal 120 to perform periodic communication with the second terminal 130, and the timeslot may include a plurality of first slots. In order to prevent a communication collision between the terminals and the second terminal may be differently assigned to each of the first terminal. Preferably, the data manager 533 may collect monitoring information received from the second terminal 130 to manage the history of each of the first terminals 110 and to monitor the status and location information of the first terminal 110. have. The emergency situation determination unit 534 comprehensively analyzes the monitoring information received from the second terminal 130 to predict the occurrence of an emergency situation, and the command transmission unit 535 may determine the information predicted by the emergency situation determination unit 534. On the basis of this, a command message, for example, a command message not to access a specific area may be generated and transmitted to the second terminal 120.

6 is a flowchart illustrating a situation detection method according to an embodiment.

Referring to FIG. 6, as a method performed in the emergency induction lamp 110, when the vibration sensor 210 and the barometric pressure sensor 220 measure data on vibration and barometric pressure, the data transmission / reception unit 251 of the control module 250 may be used. ) Receives the measured information from the vibration sensor 210 and the barometric pressure sensor 220 (step S610).

The emergency situation determination unit 252 determines whether an emergency situation occurs based on the vibration signal measured by the vibration sensor 210 (step S620). Preferably, the emergency determination unit 252 receives the vibration signal measured from the vibration sensor, monitors the amplitude of the vibration of a specific band, and determines that an emergency has occurred when the amplitude exceeds a preset value. have.

More specifically, the emergency situation determination unit 252 analyzes the frequency component of the output of the vibration sensor 210 to monitor the amplitude of the vibration of the 0.5Hz band that may affect the building, such as an earthquake. When a vibration signal output from each vibration sensor 210 provided in each emergency induction lamp is received, the emergency situation determination unit 252 performs a FFT (fast Fourier transform) on the vibration signal, converts it into a frequency band, and analyzes a specific frequency. Low-pass filters are used to remove noise (eg, environmental effects above the 0.6 Hz band). Next, the emergency determination unit 252 performs an inverse FFT on the signal from which the noise is removed and converts the signal into a vibration sensor value in a time domain rather than a frequency domain. That is, the emergency situation determination unit 252, for example, in order to accurately detect the vibration of the 0.5Hz band by applying a low pass filter signal of a band larger than 0.5Hz (for example, a person occurring in the 6-15Hz band Step by step and the vibration caused by the surrounding environment) to eliminate the vibration.

Then, the emergency situation determination unit 252 determines whether there is a danger of collapse or that collapse occurs, that is, an emergency situation, according to the area of the signal in the vibration signal from which the noise is removed through the low pass filter. Preferably, the emergency situation determination unit 252 performs the calibration (calibration) for the vibration sensor 210 when the standard deviation of the output of the vibration sensor 210 is less than a predetermined value, vibration when calculating the area of the signal Effects such as bias of the sensor 210 and basic vibration of the building can be eliminated. That is, when the output of the vibration sensor 210 is smaller than the predetermined standard deviation value, the emergency situation determination unit 252 measures the average of the vibration sensor 210 output and continuously subtracts it from the output of the vibration sensor to vibrate. This is to exclude the influence of the bias of the sensor 210 and the building natural vibration. As such, the area of the vibration signal excluding the influence of the bias of the vibration sensor 210 and the building natural vibration may be calculated according to Equation 1 below.

[Equation 1]

는 비상유도등 k의 진동 신호의 면적,

는 진동 신호,

는 캘리브레이션에 의해 측정된 값에 해당하고, 진동 신호의 면적이 산출되는 시간 t의 구간은 일정한 시간 구간으로 기설정될 수 있다. 예를 들어, [식 1]에서는 t=5~t=7 인 경우의 예시이고, 일정한 타임 윈도우(Time Window) 사이즈가 3초로 설정된 경우, 현재 시간이 8초이면 t=5~t=8 구간에서의 진동 신호의 면적이 산출되고, 현재 시간이 9초이면 t=6~t=9 구간에서의 진동 신호의 면적이 산출되고, 현재 시간이 10초이면 t=7~t=10 구간에서의 진동 신호의 면적이 산출될 수 있다. 이와 같이 현재 시간에 따라 진동 신호의 면적이 지속적으로 산출되면서 비상상황위험 또는 발생을 판단하기 위한 기준값이 적용되는 것이다.Where k is an identifier of emergency induction, t is time,

Is the area of the vibration signal of k,

The vibration signal,

Corresponds to a value measured by the calibration, and a section of time t at which the area of the vibration signal is calculated may be preset to a predetermined time section. For example, [Equation 1] is an example of the case of t = 5 to t = 7, and if a constant time window size is set to 3 seconds, if the current time is 8 seconds, t = 5 to t = 8 intervals. The area of the vibration signal at is calculated, and if the current time is 9 seconds, the area of the vibration signal at t = 6 to t = 9 is calculated. If the current time is 10 seconds, the area of the vibration signal at t = 7 to t = 10 The area of the vibration signal can be calculated. As the area of the vibration signal is continuously calculated according to the current time, a reference value for determining an emergency risk or occurrence is applied.

For example, referring to FIG. 8, the area of the vibration signal for each of the emergency induction lamps (1 to 5) is calculated in the range of t = 5 to t = A and t = A to t = B. If the reference area value corresponding to emergency risk is Thre1 and the reference area value corresponding to emergency occurrence is Thre2, the area at t = 5 ~ t = A of emergency induction lamp ⑤ is more than Thre1 and less than Thre2. Since the area of t = A ~ t = B of the emergency induction lamp ④ and the emergency induction lamp ⑤ is more than Thre2, it may be determined that an emergency situation occurs. The area marked in blue is a value measured by calibration and is excluded when calculating the area.

In addition, the emergency determination unit 252 may receive information on the air pressure and temperature measured from the air pressure sensor 220 to determine whether an emergency situation such as a fire occurs on the basis of a change pattern of temperature and air pressure, Information about the toxic gas detected from the gas sensor may be provided to determine whether an emergency situation such as a fire occurs.

If it is determined that the emergency situation has occurred from the emergency situation determination unit 252, the evacuation route determination unit 253 determines the evacuation route by sharing information about the emergency situation and its location information with other emergency inductions (step S630). ). Here, each of the emergency induction lamps 110 stores the information on the path between its own location information and other emergency induction lamps in advance. For example, referring to FIG. 9, as information previously stored in the emergency induction lamp 1, an identifier of each emergency induction lamp, a weight of a location of the emergency induction lamp, a weight for setting a path between the emergency induction lamp, and the like are stored. Information on emergency induction, etc., located at the entrance of a building can also be stored. That is, when the emergency induction lamps are installed in the building, the total number of induction lamps installed in the building is input to each emergency induction lamp so that the distance between all the emergency induction lamps can be calculated during communication between the emergency induction lamps for setting the route.

Preferably, the evacuation route determination unit 253 may determine the evacuation route to the emergency induction, etc. located in the entrance and exit of the building based on the information and location information on the emergency situation and shared with other emergency induction. In addition, the evacuation route determination unit 253 may increase the accuracy of the evacuation route by performing the layer division between each other based on the barometric pressure value shared with other emergency induction.

More specifically, the evacuation route determination unit 253 sets weights on each path between the emergency inductions and the like based on the information on the emergency situation and the location information, and located at the entrance of the building from its location using the set weights. The shortest evacuation route to the location of emergency induction, etc. can be calculated. Here, the final destination of the evacuation route is an emergency guide, which is always located at the entrance of the building. Preferably, the evacuation route determining unit 253 may calculate a weight on a path from one emergency induction lamp to the next emergency induction lamp based on the distance information between the emergency induction lamps, for example, the distance between the emergency induction lamps is short. The smaller the weight is set, the greater the distance between the emergency induction lamps, the larger the weight can be set.In accordance with the information on the emergency situation, the weight of the path connected to the emergency induction lamp which detects the emergency situation can be set to infinity, An additional weight (+ a) may be set to a weight based on distance information in the weight of the path between the emergency induction light that detects an emergency situation and the emergency induction light in an adjacent area according to the distance from the emergency induction light that detects a situation. Here, the value of the additional weight value corresponds to a preset value.

Preferably, if weights are set for each route, the evacuation route determination unit 253 may be configured to determine the distance from the emergency induction lamp at the specific position (for example, the position of the firefighter or the citizen corresponding to the position of the first terminal) to the next emergency induction lamp. The evacuation path may be determined by selecting the path having the lowest weight based on the weight set in the path, and then selecting the path having the lowest weight as the path to the next emergency induction. For example, referring to Figure 10, when a fire occurs in the first emergency induction lamp, an infinite weight is set in the path between the emergency induction light and the second emergency induction light connected to the first emergency induction light, the remaining emergency induction light The distances between the emergency guide lights and the emergency guide lights, which are connected to the emergency guide lights 4 in the area adjacent to the emergency guide lights, are added to the paths. Can be set. Then, when the position of the firefighters is the emergency induction lamp 2, the emergency induction lamp which is movable from the emergency induction lamp 2 is the emergency induction lamps 1 and 3, and the evacuation route determining unit 253 is the emergency induction lamp 2 and emergency 1 lamp. By comparing the weights set in the path between the guide lights and the weights set in the path between the 2nd emergency guide and the 3rd emergency induction light, the route to the 3rd emergency induction light having a lower weight is selected, and in this way, it is possible to move from the 3rd emergency induction light. By comparing the weights set in the route (Emergency Induction Light No. 3-> Emergency Induction Light No. 3, Emergency Induction Light No. 3-> Emergency Induction Light No. 5), select the route to Emergency No. 5 Emergency Induction Light with low weight, and Compare the weights set in the movable path (Emergency induction lamp # 5-> Emergency induction lamp # 5, Emergency induction lamp # 5-> Emergency induction lamp # 7). The path can be selected. Therefore, the evacuation route determining unit 253 may determine the route connected to the emergency induction lamps 2-> 3-> 5-> 7 in the example shown in FIG.

The output module 240 outputs guide information based on the evacuation route determined by the evacuation route determination unit 253 (step S640). Preferably, the output module 240 may output direction information for guiding the shortest evacuation path through the display. For example, the direction information may be indicated by an arrow, and the firefighter or citizen may move along the green evacuation path shown in FIG. 10 according to the indicated arrow.

Hereinafter, an operation performed between the emergency induction lamp 110, the first terminal 120, the second terminal 130, and the server 140 while the situation detection method is performed through the emergency induction lamp 110 described above. It demonstrates.

The first terminal 120 periodically communicates with the emergency induction lamp 110. Preferably, the emergency induction lamp 110 periodically transmits the identifier, the location information, and the barometric pressure information to the first terminal 120, and, if an emergency situation occurs, information on the emergency situation to the first terminal 120. Can transmit In addition, the first terminal 120 may periodically transmit the identifier, status information, location information, and routing request information to the emergency induction lamp (110).

First, the emergency induction lamp 110 determines whether the first terminal 120 enters or exits a building based on signal strength according to periodic communication with the first terminal 120, and determines whether or not the building access information is entered into a second terminal ( 130). Preferably, the emergency induction lamp 110 has a distance from the emergency induction lamp 110 when the value of the received signal strength (RSS) is -60 dBm or less during periodic communication with the first terminal 120. Is within 2 to 3m, it can be determined that the first terminal 120 has been put into the building.

Preferably, the first terminal 120 may estimate the location based on the identifier, location information, and barometric pressure information received from the emergency induction lamp 110 through the communication module 310.

In one embodiment, when the distance between the first terminal 120 and the emergency induction light 110 is within a certain distance, the position of the emergency induction light 110 may be determined as the position of the first terminal 120. The location information acquisition unit 341 of the first terminal 120 is based on the cell ID method, and the distance from the emergency induction lamp 110 based on the signal strength according to the communication with the emergency induction lamp 110. If it is determined that is within 1m, the location of the emergency induction light 110 may be determined as the location of the first terminal 120. For example, FIG. 11 (a) shows the change in signal strength in Wi-Fi and Bluetooth communication, and FIG. 11 (b) shows the change in signal strength in Laura communication, where the signal strength is in the yellow region. If included, it may be determined that the distance from the emergency induction lamp is within 1m.

In another embodiment, if the distance between the first terminal 120 and the emergency induction light 110 is not within a specific distance, the signal strength of the communication signal received from the emergency induction light 110, three or more emergency induction light receiving the communication signal The position of the first terminal 120 may be determined according to the distance information between the two, or the movement distance estimated by the walking estimation navigation system (PDR). Preferably, when the location information acquisition unit 341 of the first terminal 120 determines that the distance from the emergency induction lamp 110 is not within 1 m based on the signal strength, the location information acquisition unit 341 acquires the signal from the signal strength and the sensor module 320. The combined information can be combined using a recursive filter to determine the location information.

)를 추정(Calibration)한다. 경로 감쇄 지수는 환경에 따라 매우 다른 값을 가지므로, 본 발명은 거리 정보의 산출에 있어서 정확도를 향상시키기 위해 PDR을 이용하여 경로 감쇄 지수를 실시간으로 추정하는 것이다.More specifically, the location information acquisition unit 341 estimates the real-time moving distance of the first terminal 120 by using PDR (Pedestrian Dead Reckoning) based on the information obtained from the sensor module 320, Based on the measured signal strength, the path attenuation index (see [Equation 2]) is used for the signal strength attenuation model of the communication signal over distance.

) Is estimated. Since the path attenuation index has a very different value according to the environment, the present invention estimates the path attenuation index in real time using the PDR to improve the accuracy in calculating the distance information.

[Equation 2]

은 실시간으로 측정되는 신호세기(dBm),

는 1m 거리에서의 신호세기,

는 1m,

는 정규 무작위 변수(normal random variable),

는 경로 감쇄 지수(path loss exponent), d는 PDR을 통하여 측정된 이동거리에 해당하고,

는 0일 수 있다.From here,

Is the signal strength (dBm) measured in real time,

Is the signal strength at 1m distance,

Is 1 m,

Is a normal random variable,

Is the path loss exponent, d is the moving distance measured through PDR,

May be zero.

The location information acquisition unit 341 is a distance between the first terminal 120 and each of the three or more emergency induction lamps using signal strength measured in real time from the emergency induction lamp, based on the path attenuation index obtained from [Equation 2]. It is possible to estimate (d) as shown in [Equation 3] and obtain the position of the first terminal 120 according to triangulation based on the distance between three or more emergency induction lamps. For example, referring to FIG. 12, the location information acquisition unit 341 calculates the distance Da between the beacon node A and the mobile node M by substituting the real-time signal strength PL measured from the beacon node A into [Equation 3]. The distance Db between the mobile node M from the beacon node B is calculated by substituting the real time signal strength measured from the beacon node B into [Equation 3], and the real time signal strength measured from the beacon node C is substituted into [Equation 3]. The distance Dc between the mobile nodes M can be calculated from the beacon node C. Here, the beacon nodes A, B, and C represent three emergency induction lamps, and the mobile node represents the first terminal 120. Next, the location information acquisition unit 341 may perform triangulation using Da, Db, and Dc.

[Equation 3]

은 실시간으로 측정되는 신호세기(dBm),

는 1m 거리에서의 신호세기,

는 1m,

는 정규 무작위 변수(normal random variable),

는 경로 감쇄 지수(path loss exponent), d는 제1 단말기(120)와 비상유도등 간의 거리에 해당한다.From here,

Is the signal strength (dBm) measured in real time,

Is the signal strength at 1m distance,

Is 1 m,

Is a normal random variable,

Denotes a path loss exponent, and d denotes a distance between the first terminal 120 and an emergency induction.

Then, the position information acquisition unit 341 combines the position obtained by triangulation and the position by the PDR recursively according to Equation 4 below.

[Equation 4]

는 PDR에 의한 위치,

는 PDR에 의한 위치에 대한 가중치,

은 삼각측량에 의한 위치에 대한 가중치,

는 삼각측량에 의한 위치,

는 칼만 게인(Kalman Gain),

는 공분산, I는 아이덴티티 매트릭스(Identity Matrix)에 해당한다.Here, A is a variable (Matrix) indicating the correlation between the previous position and the current position by the PDR,

Location by PDR,

Is the weight for position by PDR,

Is the weight for position by triangulation,

Is the position by triangulation,

Is the Kalman Gain,

Is the covariance and I is the identity matrix.

In more detail with reference to [Equation 4], first, the position by the PDR is estimated in real time using Equation 5 below.

[Equation 5]

와

는 현재 위치의 x축 및 y축 좌표값,

및

는 이전 위치의 x축 및 y축 좌표값,

은 보행자의 보폭(즉, 제1 단말기(120)를 소지한 사람의 보폭),

는 진행방향 성분이다. [식 5]를 행렬적으로 다시 정리하면 [식 6]과 같고, 여기에서,

이 [식 4]의 A값이고,

이 [식 4]의 B값이다.From here,

Wow

Is the x- and y-axis coordinates of the current position,

And

Is the x- and y-axis coordinates of the previous position,

Is the stride length of the pedestrian (ie, the stride length of the person carrying the first terminal 120),

Is the direction of travel component. Reordering Equation 5 matrixwise is the same as Equation 6, where

Is the A value of [Equation 4],

It is B value of this [Equation 4].

[Equation 6]

In addition, the expression of Expression 7 below holds true before the expression of Expression 4.

[Equation 7]

는 삼각측량에 의하여 측정된 위치 좌표값,

는 PDR에 의하여 측정된 위치 좌표값이다. [식 7]은 아래의 [식 8]과 같이 표현될 수 있고, [식 8]을 참조하면, [식 4]에서 H가 나타내는 값은

이다.From here,

Is the position coordinate value measured by triangulation,

Is the position coordinate value measured by the PDR. [Equation 7] can be expressed as [Equation 8] below, referring to [Equation 8], the value represented by H in [Equation 4] is

to be.

[Equation 8]

는 PDR 및 삼각측량에 의하여 획득된 위치를 어떠한 비중으로 결합할지 조절하는 변수이고, [식 4]의 3번째 줄에 기재된 수식을 통하여 자동적으로 계산될 수 있다.

는 PDR 및 삼각측량에 의하여 계산되는 두 위치의 차이를 지속적으로 추정하는 변수로서, 상수(Constant)로 미리 설정될 수 있다. I는 행렬의 대각 성분이 1이고 나머지 성분은 0인 행렬이다.Preferably, in [Formula 4]

Is a variable controlling the specific gravity of the position obtained by PDR and triangulation, and can be automatically calculated through the equation described in the third line of [Equation 4].

Is a variable that continuously estimates the difference between the two positions calculated by PDR and triangulation, and may be preset as a constant. I is a matrix whose diagonal component is 1 and the remaining components are 0.

Preferably, the values of Q and R in Equation 4 may be adjusted according to the environment and temperature at which the first terminal 120 is located. The Q value can be adjusted according to the sensitivity change of the sensor with temperature, and is most stable at 26.5 ° C. corresponding to room temperature, for example. At the temperature other than this, since the influence due to the noise of the sensor increases, the Q value may change according to the temperature measured by the temperature sensor of the sensor module 320. For example, if the Q value is increased based on 26.5 ° C., the weight of the PDR decreases, and if the Q value decreases, the weight of the PDR increases.

Preferably, the R value may be adjusted according to the signal-to-noise ratio (SNR) according to the environment, and may be adjusted according to Equation 9 below. For example, the SNR of the signal coming from the basement to the ground may have a negative value due to the influence of noise, and if there is no obstacle between the transmitter and the receiver, the SNR may have a large value as the positive value and the R value increases. The weight of the triangulation decreases, and if the value of R decreases, the weight of the triangulation increases.

[Equation 9]

는 SNR이 음수값을 가지더라도 R이 양수값을 가질 수 있을 만큼 큰 값으로 기설정된 값이다. From here,

Is a value preset to be large enough that R can have a positive value even if the SNR has a negative value.

In addition, the first terminal 120 may estimate the altitude based on the value measured from the barometric pressure sensor 220 of the emergency induction lamp 110. For example, referring to FIG. 13, the first terminal 120 corrects a bias with respect to the air pressure information provided from the air pressure sensor 220 of the emergency induction lamp 110, and presets the value after correction by floor. The altitude of the first terminal 120 may be estimated based on the floor indicated by the reference air pressure value that is most similar to the reference air pressure value.

The second terminal 130 periodically communicates with the emergency induction lamp 110 or the first terminal 120 to transmit and receive information with the emergency induction lamp 110 or the first terminal 120. Preferably, the second terminal 130 directly receives the information on the first terminal 120 from the first terminal 120, or delivers information about the first terminal 120 through the emergency induction lamp (110). I can receive it. That is, the first terminal 120 transmits the routing request information to another first terminal or emergency induction lamp 110 so that the information is transmitted to the second terminal 130 through the other first terminal or emergency induction lamp 110. It is. Hereinafter, the present invention will be described in more detail with reference to FIG. 7.

Referring to FIG. 7, the first terminal 120 determines whether the second terminal 130 has not communicated with the second terminal 130 for a predetermined time or more (step S710). Preferably, the communication module 310 of the first terminal 120 may determine whether communication is maintained based on the number of recent communication with the second terminal 130, for example, the communication module 310. If the communication signal transmitted from the second terminal 130, that is, the communication message having a beacon function is not received three or more times, it may be determined that the communication connection with the second terminal 130 has been lost.

If it is determined in step S710 that the second terminal 130 is not communicated with the second terminal 130 for more than a predetermined time, that is, when the first terminal 120 cannot communicate with the second terminal 130, the first terminal 120 communicates. The location information and status information is transmitted to another connected first terminal or emergency induction lamp 110 (step S720). Preferably, the first terminal 120 may transmit the location information and the status information to the emergency induction lamp 110 or another first terminal together with a routing request flag. Here, the routing request flag may be set to “Set (1)” or “Off (0)”, and the first terminal 120 cannot directly transmit data to the second terminal 130. If routing of data through the emergency induction lamp 110 or other first terminal is required, the routing request flag is set to Set (1) and data is transmitted. If routing is not necessary, the routing request flag is Off (0). Data is transmitted.

The other first terminal or the emergency induction lamp 110 which receives the location information and the status information of the first terminal 120 together with the routing request flag, transmits the location information and the status information of the first terminal 120 to the second terminal 130. It passes to (step S730).

In one embodiment, when the location information and the status information together with the routing request information of the first terminal 120 is transmitted to the emergency induction light 110, the emergency induction light 110 is a weight between the predetermined emergency induction light (see FIG. 9). Based on the routing of the message to the emergency induction lamp located at the entrance to the building, the emergency induction lamp located at the building entrance can transmit the received message to the second terminal (130). In another embodiment, when the location information and the status information together with the routing request information of the first terminal 120 are transmitted to another first terminal, the other first terminal is routed to another first terminal through the second terminal. Information may be transmitted to a first terminal capable of communicating with the 120 or information may be transmitted to a first terminal capable of communicating with an emergency induction or the like, and the number of routings is not limited. Here, the information transmitted to the emergency induction lamp may be transmitted to the second terminal 130 through routing between the emergency induction lamps as described above.

While a preferred embodiment of the situation detection system and method according to the present invention has been described above, the present invention is not limited thereto, and the present invention is not limited thereto, and various modifications can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. It is possible and this also belongs to the present invention.

100: situation detection system
110: emergency induction light
120: first terminal
130: second terminal
140: server

Claims (9)

Emergency induction lamps;
A first terminal periodically communicating with the emergency induction lamp; And
And a second terminal periodically performing communication with the emergency induction lamp or the first terminal.
The emergency induction lamp,
Vibration sensor and barometric pressure sensor;
A control module that receives information measured from the vibration sensor and the barometric pressure sensor to determine a situation;
A communication module for transmitting / receiving information measured from the vibration sensor and the barometric pressure sensor and information on a situation determined by the control module with other emergency induction lamps; And
An output module for outputting guide information according to a situation determined by the control module,
The emergency induction and the like, based on the signal strength according to the periodic communication with the first terminal determines whether the building access to the first terminal, and transmits the information about the building access to the second terminal,
When the first terminal cannot communicate with the second terminal, the first terminal transmits routing request information to another first terminal or emergency induction and the like, and transmits the information to the second terminal through the other first terminal or the emergency induction. Situation detection system, characterized in that. The method of claim 1, wherein the control module,
And receiving a vibration signal measured by the vibration sensor to monitor an amplitude of vibration of a specific band.
The method of claim 2, wherein the control module,
When the amplitude exceeds a predetermined value, it is determined that an emergency situation has occurred, and the situation detection system, characterized in that the information and location information about the emergency situation is shared with other emergency induction through the communication module.
The method of claim 3, wherein the control module,
Based on the information on the shared emergency situation and location information, determine the evacuation route to the emergency induction lamp located in the entrance of the building, but the path between the information of the emergency induction lamp located in the entrance of the building and the emergency induction Situation detection system, characterized in that pre-stored.
The method of claim 4, wherein the control module,
Based on the information on the emergency situation and location information, weights are set for each path between the emergency induction lamps, and the shortest evacuation path from the position of the user to the location of the emergency induction lamp located at the entrance of the building using the set weights. The weight of the path connected to the emergency induction lamp which detects the emergency situation according to the information on the emergency situation is set to infinity, the weight is set according to the distance of each path between the emergency induction lamps, and the emergency situation is detected. The situation detection system, characterized in that the additional weight is set according to the distance from the emergency induction lamp.
The method of claim 5, wherein the control module,
And the direction information for guiding the evacuation path through the output module according to the determined evacuation path.
The method of claim 1,
When the first terminal transmits the routing request information to the emergency induction lamp, the emergency induction lamp routes the message to the emergency induction lamp located at the entrance of the building based on a preset weight between emergency induction lamps and the emergency located at the building entrance. Induction light is a situation detection system, characterized in that for transmitting the received message to the second terminal.
The method of claim 1, wherein the first terminal,
The situation detection system, characterized in that for estimating the altitude received from the barometric pressure sensor, such as through the communication module.
The method of claim 1, wherein the second terminal
And receiving information on the first terminal directly from the first terminal or receiving information on the first terminal through the emergency induction.

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