KR102577030B1 - Risk Management System Using Optical Fiber Sensor and Terrain Change Management Method Thereby - Google Patents

Abstract

The present invention relates to a crisis management system and method using an optical fiber sensor. The crisis management system using an optical fiber sensor according to an embodiment of the present invention is installed in an area where ground subsidence, cut slope, or fill slope collapse is expected to be used in the area. An optical fiber sensor that detects terrain changes and an administrator who manages the area by analyzing the detection signals of the optical fiber sensor and notifying a risk alert to the user's terminal device located within a designated range of the area when subsidence or collapse is expected in the area. It may include a crisis management device that requests risk management from the administrator's terminal device.

Description

Risk Management System Using Optical Fiber Sensor and Terrain Change Management Method Thereby}

The present invention relates to a crisis management system and method using optical fiber sensors. More specifically, the present invention relates to a crisis management system and method using optical fiber sensors, etc. This is about a crisis management system and method using an optical fiber sensor that manages a crisis through central control after establishing a system that detects changes in terrain such as terrain.

As urbanization progresses and industry develops, various types of underground pipes are buried underground in the city center. Underground pipes are facilities built to supply utilities necessary for people's lives or, conversely, to collect and process wastewater discharged by people as they live. They are used in various ways, such as pipes where various transmission or communication lines are installed, water pipes, wastewater pipes, and hot water pipes. There are different types.

As society becomes more complex and urbanization accelerates, various types of underground pipes are being installed underground. Due to their nature, underground pipes have problems such as difficulty in management and maintenance once laid. In general, underground pipes are circular or square pipes buried underground, and electric wires or communication lines are installed inside them, or they themselves may serve as passageways for water and sewerage. However, it is common for underground pipes to age over time or to be damaged due to natural disasters such as surrounding ground subsidence or earthquakes.

When underground pipes are damaged or destroyed, secondary damage occurs economically and socially depending on the type of utility passing through them. For example, when water pipes are damaged, tap water leaks, causing loss of water resources, and when sewer pipes are damaged, the surrounding environment is polluted. In addition, if wires or communication facilities are damaged, not only will smooth electricity supply or communication be interrupted, but accidents such as fires or electric shocks may also occur in underground pipes.

However, because underground pipes are buried underground, they are not easy to inspect with the naked eye, and even if an accident or breakdown occurs, immediate detection or maintenance is difficult. Therefore, it is necessary to detect underground pipes before they are seriously damaged and to perform maintenance before secondary damage occurs or expands. To solve these problems, various underground pipe settlement detection methods have been developed in the past.

Typically, in the past, a method of measuring the amount of deformation of the excavated ground by installing a deformation meter or a separate jig was used to detect settlement or deformation of underground pipes. In the case of power transmission lines, heat generated from a heat source was detected. Methods of measuring the temperature difference within the soil or assuming a model of the soil to obtain thermal resistance in the laboratory were also used.

However, this conventional method has a problem in that it cannot detect ground subsidence in real time and its detection efficiency is also low.

Korean Patent Publication No. 10-0712475 (2007.04.23) Korean Patent Publication No. 10-0943166 (2010.02.11) Korean Patent Publication No. 10-1106167 (2012.01.09) Korean Patent Publication No. 10-1042076 (2011.06.09)

An embodiment of the present invention uses optical fiber sensors, etc. to build a system that detects topographical changes such as land subsidence in a wide area, collapse of steep slopes such as cut slopes, or collapse of fill slopes, reservoir dams, and river embankments, and then centrally controls them. The purpose is to provide a crisis management system and method using optical fiber sensors to manage crises through.

A crisis management system using an optical fiber sensor according to an embodiment of the present invention includes an optical fiber sensor installed in an area where ground subsidence or cut slope collapse is expected to detect changes in the topography of the area, and an optical fiber sensor that analyzes the detection signal of the optical fiber sensor. When subsidence or collapse is expected in the area, a risk warning is notified to the user terminal device of the user located within the designated range of the area, and terrain change management is requested to manage the risk through the manager terminal device of the manager managing the area. Includes device.

The terrain change management device may determine the location of the user terminal device based on location information of the area and notify the danger warning based on the location result.

The terrain change management device measures the distance or signal strength of the user terminal device provided from the access point that governs communication in the area, recognizes the user terminal device located in the designated range of the area, and notifies the risk warning. You can.

The terrain change management device determines the settlement or collapse when the comprehensive analysis results of the first and second signals respectively received from the first and second optical fiber sensors installed in the area satisfy preset conditions. You can.

The terrain change management device may detect pressure changes by analyzing signals from the optical fiber sensor.

In addition, the crisis management method using an optical fiber sensor according to an embodiment of the present invention includes the steps of an optical fiber sensor installed in an area where ground subsidence or collapse of a cut slope or fill slope is expected to detect a change in the topography of the area, and The topographic change management device analyzes the detection signal of the optical fiber sensor, and when subsidence or collapse is expected in the area, it notifies a risk warning to the user terminal device located in the designated range of the area, and manages the area. It includes a step of requesting the manager to manage the risk with the manager terminal device.

In the requesting step, the location of the user terminal device may be determined based on location information of the area, and the risk warning may be notified based on the location result.

The requesting step measures the distance or signal strength of the user terminal device provided from the communication device in charge of communication in the area, recognizes the user terminal device located in the designated range of the area, and notifies the risk warning. there is.

In the requesting step, the sinking or collapse can be determined when the comprehensive analysis results of the first and second signals respectively received from the first and second optical fiber sensors installed in the area satisfy preset conditions. there is.

The requesting step may detect pressure changes by analyzing signals from the optical fiber sensor.

According to an embodiment of the present invention, an optical fiber cable or an optical fiber sensor is installed in an arbitrary area where ground subsidence, cut slope, or fill slope collapse is expected to detect changes in the terrain in advance, thereby reducing damage to human or material resources. I can get rid of it.

In addition, according to an embodiment of the present invention, it is possible to use existing optical fiber cables, thereby saving costs in building a crisis management detection system.

1 is a diagram showing a crisis management system using an optical fiber sensor according to an embodiment of the present invention;
Figure 2 is a diagram for explaining the configuration of an optical fiber;
Figure 3 is a diagram for explaining the signal processing process using an optical fiber sensor;
Figure 4 is a block diagram illustrating the detailed structure of the crisis management device of Figure 1, and
Figure 5 is a flowchart of a crisis management method using an optical fiber sensor according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Figure 1 is a diagram showing a crisis management system using an optical fiber sensor according to an embodiment of the present invention, Figure 2 is a diagram illustrating the configuration of an optical fiber, and Figure 3 is a diagram illustrating a signal processing process using an optical fiber sensor. .

As shown in FIG. 1, the crisis management system (hereinafter referred to as crisis management system) 90 using an optical fiber sensor according to an embodiment of the present invention includes an optical fiber sensor (or optical fiber cable) 100 and a user terminal device 105. , includes part or all of the communication network 110, crisis management device 120, and third-party device 130, and further includes a communication device (not shown) that governs communication in the area where the optical fiber sensor 100 is installed. can do.

Here, “including part or all” means that the crisis management system 90 is configured by omitting some components such as the user terminal device 105, or some or all of the components constituting the crisis management device 120. means that it can be integrated and configured into a network device (e.g., wireless switching device, etc.) constituting the communication network 110, and is explained as being fully included to facilitate a sufficient understanding of the invention.

The optical fiber sensor 100 is a sensor using an optical fiber, and various types of sensors can be used, such as those in which the fiber itself has a sensing function, and those in which the sensor is separate and the fiber is used as a path to transmit the signal. In particular, the fact that the optical fiber itself becomes a sensor has the characteristic of being a sensor that is not affected by surrounding electromagnetic noise. For example, if the optical fiber expands and contracts due to temperature or pressure and detects interference factors passing through it, it becomes a temperature and pressure sensor. For example, it is used to control jet engines. There is also an optical fiber gyroscope that is mounted on aircraft that captures the phase difference between light traveling in the direction of rotation and light traveling in the opposite direction. Applications of the Doppler effect of light include speedometers, blood meters, and vibration sensors.

The optical fiber sensor 100 according to an embodiment of the present invention installs an optical fiber cable in an area 99 where ground subsidence or slope collapse is expected due to changes in terrain, for example, and continuously transmits a test signal of a designated form through the optical fiber cable. By detecting the characteristics of the signal that is fed back after transmitting, it is possible to detect changes in the topography of the area (99). Alternatively, pressure sensors may be buried in a plurality of locations in the same area 99 and the detection signals of the pressure sensors may be processed through optical cables. Fiber-optic grid sensors called 'FBG sensors' are also being spread on the market, and in an embodiment of the present invention, various types of sensors are installed in areas 99 where crises such as ground subsidence are expected to prevent crises due to changes in terrain. It can be used to detect.

For example, when the optical fiber cable itself is used as a sensor, the same operating principles as in FIGS. 2 and 3 can be applied. In other words, the internal structure of the optical fiber is composed of three elements: core, cladding, and buffer coating, as shown in FIG. 2. The core is the central part of the thin glass fiber and becomes the passage through which light moves. The refractive index of this central part is designed to be slightly larger than the refractive index of the outer part, so that light moves without loss using the phenomenon of total reflection. It is possible. Cladding is an element that surrounds the outside of the core and plays the role of reflecting light into the core, creating conditions for total reflection. Buffer coating is a coating on plastic fibers that protects optical fibers. If the refractive index of the optical fiber core is higher than that of the clad, the light entering the core repeats total reflection at the boundary between the core and the clad and propagates into the core, as shown in Figure 2. In other words, the cladding does not absorb light but totally reflects it, allowing the light source to be transmitted over a very long distance along the core without loss. Physically, making the refractive index of the core larger than that of the clad does not necessarily mean that total internal reflection occurs. Various internal reflections can occur depending on the angle at which light is incident. If the incident angle of the light source is greater than the critical angle, total reflection always occurs, and the cladding does not absorb light at all, so even if the optical fiber is bent or curved, it is far away. Light can be transmitted over long distances. An optical fiber with a core diameter of 9㎛ is called a single mode optical fiber (SMF), and one with a core diameter of 125㎛ is called a multi-mode optical fiber (MMF). SMF has a wide bandwidth and is advantageous for long-distance transmission, while MMF has a narrow bandwidth and is suitable for short-distance transmission. For sensors, SMF, which has excellent sensitivity, is mainly used. Therefore, the amount of change in light can be measured by connecting an LED or laser diode, which is a light source, to the end of the optical fiber, and connecting an optical sensor to the part that receives the returning light.

Therefore, according to an embodiment of the present invention, the optical fiber sensor 100 of FIG. 1 may be used in a buried form as shown in FIG. 3 to detect topographic changes such as ground subsidence, cut slope, or fill slope collapse. Figure 3(a) shows a case where the optical fiber sensor 100 is used as an embedded type. Lay a mat so that the vibration of the ground is well transmitted to the sensor, and install the optical fiber sensor 100 in a zigzag shape under the mat within about 5 cm from the ground. The spacing between zigzag optical fiber sensors is approximately 20cm, and the ends of the mat are installed approximately 10cm wider than the optical fiber sensors. The electric circuit unit that sends and receives light to the optical fiber sensor 100 can be installed inside the manhole to protect against external shock or attack. The signal line and power line cable from the electric circuit part are connected to the main device. Here, the host device can transmit the detection signal of the optical fiber sensor 100 to the crisis management device 120 of FIG. 1. Alternatively, the main device may transmit only the analysis results to the crisis management device 120.

Figure 3(b) shows the algorithm for distinguishing signals from people and cars in the area where sensors are installed. In normal conditions, there is no change in the signal, but when a person enters the detection area, the signal changes. As can be seen in (b) of Figure 3, there is a difference between the size of the signal generated by the movement of a person and the size of the signal generated by the movement of a car larger than a person. However, it is difficult to tell whether a person is a person or not simply based on the size of the signal. This difference in signal sensitivity distinguishes between humans and non-human objects (e.g., cars or small animals). However, when an animal of similar size to a human enters, there is a possibility of misinformation occurring because the sensor signal is almost similar to that of a human. Therefore, in areas where embedded fiber optic sensors are installed, measures must be taken to prevent animals or other moving objects from passing nearby. When the ground is frozen, such as in winter, vibrations on the ground may be transmitted well to the sensor, but if there is a lot of rain in summer, vibrations may not be transmitted well, so it is best to differentiate the signal size depending on the environment. . However, when using a buried optical network sensor, there is a disadvantage that the initial installation cost is high because the ground must be dug first.

As described above, the optical fiber sensor 100 according to an embodiment of the present invention may be configured in various forms. For example, to save installation costs, an existing optical fiber cable installed inside a manhole may be used. Another loop is created using an optical fiber cable so that the signal according to the embodiment of the present invention can be processed through the distributor. Therefore, a test signal to detect terrain changes is transmitted through the loop, and when the transmitted test signal is fed back, the feedback signal is analyzed. For example, when a change in the feedback signal of the optical fiber sensor 100 installed in a random area is detected due to topographical changes such as ground subsidence, a crisis situation in the area is detected through the analysis results. More details will be covered later.

The user terminal device 105 installs the optical fiber sensor 100 of FIG. 1 in a random area 99, that is, when installing it in a random area 99 where ground subsidence, etc. is expected, the optical fiber sensor 100 is installed in the area. It refers to the user terminal devices 105 of users within the designated range of (99). The people in the designated area may be residents or passers-by through the area (99). The user terminal device 105 is preferably a mobile-based terminal device, such as a smartphone carried by users or a wearable device worn on the user's wrist. For example, when a crisis due to ground subsidence, etc. is expected in a random area where the optical fiber sensor 100 is installed, the crisis management device 120 of FIG. 1 is used by users located within the area 99 or close to the designated range. A dangerous situation is notified to the user terminal device 105.

For example, when a crisis due to ground subsidence or the like is detected in a random area 99, the user terminal device 105 may perform positioning at that point in time. In other words, the crisis management device 120 of FIG. 1 detects the area (99) through a satellite navigation system (GPS) based on the location information (e.g., latitude and longitude information, etc.) of the area (99) at the time when a crisis is expected. ) is located in the user terminal device 105, and based on this, the crisis situation is notified to the user terminal device 105 in the designated range. A crisis situation can take the form of receiving an SMS text message. Of course, the user terminal device 105 may be notified of a crisis situation through communication with a communication device such as an access point (AP) such as a wireless router that oversees communication in an arbitrary area 99, rather than a satellite navigation device. For example, when the crisis management device 120 requests the corresponding communication device to locate the user terminal device 105 in a designated range, the communication device such as an access point emits a beacon signal to the user terminal device 105 and responds to it. It is possible to determine the target for notification of a crisis situation by receiving a response signal or detecting a beacon signal of the user terminal device 105 and measuring the direction or distance through signal strength. As a communication device for determining a crisis situation through communication with the user terminal device 105, any number of devices can be installed and used separately according to the embodiment of the present invention. Therefore, in the embodiment of the present invention, no special device is used in any one form. It will not be limited.

The user terminal device 105 includes a user terminal device of a resident living in a random area 99 where the optical fiber sensor 100 is installed to detect topographical changes due to ground subsidence, etc., and a user terminal device of a resident passing through the area 99. It can be divided into user terminal devices. Accordingly, residents can always receive messages about crisis situations through the user terminal device 105 through preset contact information or device identification information without a separate positioning operation, but the user terminal device 105 of the passersby After the crisis management device 120 detects a crisis situation, positioning is performed at the point where the crisis situation is notified to users, and the notification target of the crisis situation is determined according to the positioning result and notification can be made.

The communication network 110 includes both wired and wireless communication networks. For example, a wired or wireless Internet network may be used or linked as the communication network 110. Here, the wired network includes Internet networks such as cable networks and public switched telephone networks (PSTN), and the wireless communication network includes CDMA, WCDMA, GSM, EPC (Evolved Packet Core), LTE (Long Term Evolution), and Wibro networks. It means including. Of course, the communication network 110 according to an embodiment of the present invention is not limited to this, and can be used as an access network for a next-generation mobile communication system to be implemented in the future, for example, a cloud computing network in a cloud computing environment, a 5G network, etc. For example, if the communication network 110 is a wired communication network, the access point within the communication network can connect to the telephone company's exchange office, etc., but in the case of a wireless communication network, data is processed by connecting to the SGSN or GGSN (Gateway GPRS Support Node) operated by the communication company, or Data can be processed by connecting to various repeaters such as BTS (Base Transceiver Station), NodeB, and e-NodeB.

Communication network 110 may also include access points. Access points include small base stations such as femto or pico base stations that are often installed in buildings. Here, femto or pico base stations are classified according to the maximum number of user terminal devices 105, etc., that can be connected in the classification of small base stations. Of course, the access point may include a short-range communication module for performing short-range communication such as ZigBee and Wi-Fi with the user terminal 100. Access points can use TCP/IP or RTSP (Real-Time Streaming Protocol) for wireless communication. Here, in addition to Wi-Fi, short-range communication can be performed using various standards such as Bluetooth, Zigbee, infrared (IrDA), RF (Radio Frequency) such as UHF (Ultra High Frequency) and VHF (Very High Frequency), and ultra-wideband communication (UWB). You can. Accordingly, the access point can extract the location of the data packet, designate the best communication path for the extracted location, and forward the data packet to the next device, such as the crisis management device 120, along the designated communication path. Access points can share multiple lines in a typical network environment and include, for example, routers, repeaters, and repeaters.

The crisis management device (120) installs an optical fiber sensor (100) in the area (99) due to concerns about a crisis due to topographical changes due to ground subsidence, collapse of steep slopes such as cut slopes, or collapse of fill slopes, reservoir dams, and river embankments. Through this, crisis situations in the relevant region (99) are centrally controlled and managed. In other words, the crisis management device 120 analyzes the signal from the optical fiber sensor 100 in real time and detects a crisis in the corresponding area 99 based on the analysis results. Of course, the crisis management device 120 may previously store data related to the form or type of crisis. In other words, if the area 99 is large, a plurality of optical fiber sensors 100 may be installed in the area 99. Therefore, when a common signal change is detected in the plurality of optical fiber sensors 100, it can be determined that ground subsidence is expected. On the other hand, when a change is detected only in a specific optical fiber sensor 100 among the plurality of optical fiber sensors 100, it may be determined that construction work, etc. is taking place in a part of the corresponding area 99. Depending on the terrain changes, it can be judged as not a crisis situation. In this way, the crisis management device 120 stores standard data related to ground subsidence, cutting, and embankment slope collapse, etc., or uses data acquired through experimentation or learning as standard data to analyze the signal from the optical fiber sensor 100 and You can prepare for crisis situations.

For example, when the crisis management device 120 uses the optical fiber cable itself as a sensor rather than a sensor, it can periodically transmit a test signal to detect a crisis situation through the optical fiber cable, and a feedback signal of the transmitted signal. It is possible to detect and analyze and determine the crisis situation in the area (99) based on the analysis results. Of course, in the embodiment of the present invention, it is possible to use additional sensing values such as a pressure sensor in addition to the signal of the optical fiber sensor 100, so the embodiment of the present invention will not be particularly limited to any one form. In addition, the crisis management device 120 can make a final decision on a crisis situation or increase the accuracy of judgment of a crisis situation by referring to weather or disaster situations by linking with the Korea Meteorological Administration server or the Korea Disaster and Safety Administration server.

The crisis management device 120 analyzes the signal from the optical fiber sensor 100 installed in a random area 99, and when a crisis is detected in the area 99, based on the location information of the area 99, A satellite navigation device or a communication device separately installed in the area 99 may be requested to locate the user terminal device 105 within the designated range of the area 99. For example, the location information of the area 99 may have multiple coordinate values representing multiple points (e.g., A, B, C, D, etc.), and thus the location information is within the range formed by the multiple coordinate values. It is determined whether the user terminal device 105 where is located is located. Of course, it is also possible to receive location information through a GPS module, but through a communication device installed in the area 99, a gyro sensor or acceleration sensor mounted on the user terminal device 105, and beacon communication, etc. By calculating the strength of the received signal, measuring the direction or distance, it is possible to determine whether the user terminal device 105 is within a designated range based on this.

If the crisis management device 120 determines that the user terminal device 105 is in an area 99 where a crisis is expected due to ground subsidence, etc., it performs a preset crisis management operation. For example, sending SMS text messages. Of course, various methods can be used to notify a crisis situation. For example, if there is a local disaster broadcasting station, the broadcasting station can be used to notify crisis situations through radio broadcasts, etc.

As described above, the crisis management device 120 uses the optical fiber sensor 100 to build a system that detects ground subsidence in a wide area, collapse of steep slopes such as cut slopes, or collapse of reservoir dams and river embankments such as fill slopes. Through this, it is centrally controlled and managed. In other words, since crisis management areas using the optical fiber sensor 100 exist in many places, they are integrated and managed by the crisis management device 120. For example, there are 25 autonomous districts in Seoul, and within the 25 autonomous districts, there may be several areas where topographical changes are expected due to land subsidence, etc. The crisis management device 120 according to an embodiment of the present invention integrates and manages this. Furthermore, it may be possible to integrate management nationwide. Accordingly, the manager accesses the crisis management device 120 online using a smartphone or computer to check and manage the values measured through the optical fiber sensor 100, and when there is a risk of collapse or subsidence, nearby residents or passersby Disaster text messages, etc. are sent to people and notified to the police or fire department to carry out control or management. This type of crisis management can predict crisis situations more accurately when applying artificial intelligence's deep learning program. In other words, the prediction accuracy of terrain changes can be improved by collecting big data related to terrain changes, analyzing it, and then learning it through a deep learning program. Compared to existing rule-based methods, artificial intelligence programs are very effective in that they are predictable.

Even if the crisis management device 120 does not notify the crisis situation to the user terminal device 105, it notifies the crisis situation to the manager terminal device of the manager who performs crisis management, such as a police officer or firefighter, allowing quick response to the crisis. Let it come true. Of course, the administrator terminal device here may constitute the third-party device 130 of FIG. 1 and may be a smartphone owned by a police officer or firefighter, but notifications may be made through various types of devices provided at police stations or fire stations. there is. Crisis management device 120 may be involved in these operations. For example, in the case of a police station or fire station, a manager who is close to the area (99) where a crisis situation is predicted is selected and notification of a crisis situation is made, but manager terminal devices such as smartphones also provide location information at the time of notification of a crisis situation. Indiscriminate notification can be reduced by notifying a crisis situation to the manager terminal device of the nearest manager. For example, in order to accurately and quickly respond, it may be possible to measure the distance of the manager's terminal device and notify the manager's terminal device of a manager within a designated ranking, such as 3rd to 5th priority.

In the case of a risk of collapse, the crisis management device 120 can set a level and then classify it into level 1 for caution, level 2 for inspection, and level 3 for control and inspection, etc., so that response can be carried out. In addition, the crisis management device 120 can also notify response measures appropriate for each level, for example, when sending an SMS text message. For example, in a 'caution' situation, traffic in the area is not restricted, but in an 'inspection' situation, traffic is restricted.

As mentioned above, the third-party device 130 includes a manager terminal device of a manager who manages a crisis situation. The administrator's terminal device can be a smartphone carried by police officers or firefighters, and it can also be a display-type situation board that allows the user to see the crisis situation at a glance. Furthermore, the third-party device 130 may further include a computer or smartphone of an administrator who manages the service of the crisis management device 120 of FIG. 1.

Figure 4 is a block diagram illustrating the detailed structure of the crisis management device of Figure 1.

As shown in FIG. 4, the crisis management device 120 of FIG. 1 according to an embodiment of the present invention includes a communication interface unit 400, a control unit 410, a terrain change crisis management unit 420, and a storage unit 430. Includes part or all of.

Here, “including part or all” means that the crisis management device 120 is configured by omitting some components such as the storage unit 430, or that some components such as the terrain change crisis management unit 420 are configured by the control unit ( 410), it means that it can be integrated and configured with other components such as

The communication interface unit 400 communicates with the optical fiber sensor 100, the user terminal device 105, and the third-party device 130 via the communication network 110 of FIG. 1, respectively. In the process of performing communication, the communication interface unit 400 performs operations such as modulation/demodulation, muxing/demuxing, encoding/decoding, and scaling to convert resolution. Since this is obvious to those skilled in the art, further explanation is omitted.

The operation of the communication interface unit 400 may be somewhat different depending on the form in which the optical fiber sensor 100 is configured in the random area 99, that is, the area where topographical changes are expected. For example, the operation may differ depending on whether the optical fiber cable itself functions as a sensor or whether a separate sensor is installed on the optical fiber cable. For example, in the former case, the communication interface unit 400 may transmit a test signal for detecting a change in terrain under the control of the control unit 410 and then receive a feedback signal. On the other hand, in the latter case, the communication interface unit 400 may receive the sensing signal measured through the sensor unit in real time or periodically. For example, in the latter case, a pressure measurement value may be received as a sensing signal measured by the sensor unit.

In addition, when a crisis due to topographical changes such as ground subsidence, cut slope, or fill slope collapse is detected in any area 99 where the optical fiber sensor 100 is installed, the communication interface unit 400 sends a crisis situation to the corresponding area 99. Notification can be made to the user terminal device 105 of a user living in or passing through the area 99. In the case of a resident, if it is determined that the resident is a resident based on the existing positioning, the crisis situation can be notified after conducting the positioning at that point only to passers-by. In other words, since it is set as default for residents, SMS text messages can be sent without any additional positioning operation. On the other hand, in the case of a passerby, a decision must be made at the time of the crisis situation, so the crisis situation is notified to the user terminal device 105, which is selected based on the positioning result through positioning. Of course, these operations are performed under the control of the control unit 410.

In addition, the communication interface unit 400 can notify a crisis situation to a third-party device 130 for control and management by crisis managers such as police or firefighters under the control of the control unit 410. The third-party device 130 may be a crisis bulletin board provided at a police station or fire station, and may include a smartphone carried by a police officer or firefighter, or a dedicated terminal separately manufactured for crisis situations.

The control unit 410 is responsible for the overall control operation of the communication interface unit 400, terrain change risk management unit 420, and storage unit 430 of FIG. 4. The control unit 410 can temporarily store the sensing data of the sensing signal received from the optical fiber sensor 100 in the storage unit 430, retrieve it, and provide it to the terrain change crisis management unit 420. In addition, when a crisis situation is predicted in a random area 99 where the optical fiber sensor 100 is installed at the request of the terrain change crisis management unit 420, the control unit 410 uses a user terminal owned by a resident of the area 99. The device 105 controls the communication interface unit 400 to notify that a crisis situation such as ground subsidence due to changes in terrain may occur. In addition, the control unit 410 uses user terminal devices 105 carried by users to determine whether there are any users within the designated range of the area 99 in order to notify passers-by passing through the area 99 of a crisis situation. ) is measured. That is, the location of the user terminal device 105 is confirmed. To this end, the control unit 410 may operate in conjunction with the terrain change risk management unit 420.

In other words, the control unit 410 performs an operation for positioning upon a request from the terrain change risk management unit 420. To this end, the control unit 410 may transmit location information, such as latitude and longitude information, of the area through communication with a satellite navigation device and request positioning of the user terminal devices 105 in the area. In other words, the satellite navigation device can acquire latitude and longitude coordinates by performing GPS communication with the user terminal device 105 in the area at the request of the control unit 410, and provides them to the control unit 410 to You can select a target to be notified of a text message of the situation. In addition, when using a communication device such as a wireless router separately installed in the area 99 rather than a satellite navigation device, the control unit 410 requests the device to position or determine the user terminal device 105 within the communication radius. You can. Accordingly, the control unit 410 can receive identification information of the user terminal device 105 as well as direction or signal strength information from the communication device and provide the information to the terrain change crisis management unit 420.

The topographic change crisis management unit 420 detects topographic changes in the area 99 where the optical fiber sensor 100 is installed and predicts ground subsidence, collapse of steep slopes such as cut slopes, or collapse of reservoir dams and river embankments such as fill slopes. Here, of course, prediction corresponds to proactive measures for prevention or prevention rather than after the fact. However, in the embodiments of the present invention, there will be no particular limitation to the preliminary measures. The terrain change crisis management unit 420 can accurately detect a crisis situation based on detection signals from a plurality of optical fiber sensors 100 installed in a wide area. In other words, when a total of 10 optical fiber sensors 100 are installed in a random area 99, a crisis situation can be detected based on the reference data matching the sensing signals of each sensor. For example, in the case of ground subsidence, signal changes must be detected in more than 8 out of 10 sensors to be judged as ground subsidence.

On the other hand, in the case of steep slopes such as cut slopes, a signal change may be detected only by the lower or upper optical fiber sensor 100 to be judged as a crisis situation, and in reservoir dams such as fill slopes, river embankments, etc., optical fiber sensors ( A crisis situation is judged based on a signal change by 100), and in order to accurately judge such a crisis situation, the related standard data can be pre-stored through experiments, etc., and the terrain change crisis management unit 420 determines the currently measured signal. It can be seen that the analysis results are compared with previously stored reference data, and when they match, a crisis situation is notified to the user terminal device 105, etc. In other words, the terrain change crisis management unit 420 analyzes the detection signal of the optical fiber sensor 100, determines the type of crisis situation based on the analysis result, and transmits a text message related to the determined crisis situation to the user or administrator. You can also send countermeasures together. In this process, the topographical change crisis management department (420) can demonstrate the learning effect of big data analysis by installing and using an artificial intelligence deep learning program for more accurate prediction of crisis situations. For example, when judging a crisis situation called ground subsidence, there is a significant difference in prediction accuracy between judging ground subsidence based on 5 learning data and judging ground subsidence based on 50 learning data. The latter case can be considered high in terms of objectivity in predicting accuracy. Therefore, the terrain change crisis management unit 420 can increase the accuracy of judgment in crisis situations by learning a lot of data through an artificial intelligence program.

The terrain change crisis management unit 420 can operate by dividing the risk of collapse into three levels depending on the level of crisis detection. In the case of level 1, the situation can be notified to the user or administrator's terminal device at the 'caution' level, and appropriate action can be taken. For example, in the 'caution' stage, traffic is not restricted, but countermeasures may be suggested to the extent of being alert when passing.

The storage unit 430 temporarily stores various types of data processed under the control of the control unit 410. For example, the storage unit 430 may store the sensing data provided by the optical fiber sensor 100 of FIG. 1 and then provide it to the terrain change crisis management unit 420. In addition, when the terrain change crisis management unit 420 provides analysis results of detection signals from the optical fiber sensors 100 installed in a random area 99, the storage unit 430 provides the analysis results under the control of the control unit 410. After temporary storage, it is stored in the DB 120a of the crisis management device 120 of FIG. 1.

In addition to the above, the communication interface unit 400, control unit 410, terrain change risk management unit 420, and storage unit 430 of FIG. 4 can perform various operations, and other details have been sufficiently explained previously. I would like to replace it with contents.

The communication interface unit 400, control unit 410, terrain change risk management unit 420, and storage unit 430 of FIG. 4 according to an embodiment of the present invention are composed of hardware modules that are physically separated from each other, but each module is It will be possible to store software to perform the above operations internally and execute it. However, the software is a set of software modules, and each module can be formed of hardware, so there will be no particular limitation on the configuration of software or hardware. For example, the storage unit 430 may be hardware, such as storage or memory. However, since it is possible to store information through software (repository), the above content will not be specifically limited.

Meanwhile, as another embodiment of the present invention, the control unit 410 may include a CPU and memory, and may be formed as a single chip. The CPU includes a control circuit, an arithmetic unit (ALU), an instruction interpretation unit, and a registry, and the memory may include RAM. The control circuit performs control operations, the operation unit performs operations on binary bit information, and the command interpretation unit includes an interpreter or compiler, which can convert high-level language into machine language and machine language into high-level language. , the registry may be involved in software data storage. According to the above configuration, for example, at the beginning of the operation of the crisis management device 120, the program stored in the terrain change crisis management unit 420 is copied, loaded into memory, that is, RAM, and then executed, thereby increasing the data operation processing speed. It can increase quickly. In the case of deep learning models, they can be loaded into GPU memory rather than RAM and executed by accelerating the execution speed using GPU.

Figure 5 is a flowchart of a crisis management method using an optical fiber sensor according to an embodiment of the present invention.

For convenience of explanation, referring to FIG. 5 together with FIG. 1, according to an embodiment of the present invention, the optical fiber sensor 100 installed in the area 99 where ground subsidence, cut slope, or fill slope collapse is expected to be in the corresponding area 99. Detect changes in terrain (S500). In order to detect changes in terrain, the optical fiber sensor 100 generates a test signal provided by the crisis management device 120 of FIG. 1 or a test signal at the request of the crisis management device 120 to determine the signal value of the feedback signal. It can be provided to the management device 120, and the pressure, etc. can be measured in real time and the corresponding measured value can be transmitted to the crisis management device 120.

In addition, the crisis management device 120 analyzes the detection signal of the optical fiber sensor 100, and when ground subsidence or collapse of cut slope or fill slope is expected in the area 99, the user located within the designated range of the area 99 A risk warning is notified to the user terminal device 105, and a request is made to the manager terminal device of the manager managing the area 99 to manage the risk (S510).

Of course, in the embodiment of the present invention, even if a danger warning is not notified to the user terminal device 105, the crisis of residents or passers-by in the area 99 can be managed through the manager. However, if users in the relevant area (99) are also notified of a crisis situation, the crisis situation can be managed by distinguishing between residents and temporary passers-by. For example, after dividing the resident group and the passerby group and managing user information, such as the phone number or identification information of the user terminal device 105, a crisis situation can be detected without a separate location process using the user terminal device 105 of the resident group. In the case of a passerby, positioning can be performed at the relevant point in time and a text message can be notified according to the results. Of course, even in the case of passers-by, only users within the designated range can be notified of a crisis situation through the user terminal device 105 owned by the user.

In addition, the crisis management device 120 installs a plurality of optical fiber sensors 100 in one area 99 to detect ground subsidence, cut slope, or slope collapse in a wide area, and then analyzes the results of the detection signal. Overall, the type of crisis can be determined. For example, the crisis management device 120 can store first standard data that can determine characteristics related to ground subsidence, and second standard data that can determine characteristics related to collapse of cut slope or fill slope, and can be stored in real time. The analysis results of the detection signal provided can be compared with the first and second reference data, respectively, and the type of crisis can be determined based on the comparison results.

For example, as a result of analyzing the characteristics of the test signal and the signal fed back to it, the crisis situation may be different as to whether signal distortion occurs in the entire section of the optical fiber cable or in some sections. For example, in the latter case, it can be judged not as a crisis situation but as a change due to construction work, etc. On the other hand, for example, if 10 sensors are installed in one area (99), whether a crisis is detected by 8 or more sensors or, in the case of a slope, whether a crisis is detected only on the upper or lower side when sensors are installed, Situations can be judged differently.

In addition to the above, the optical fiber sensor 100 and the crisis management device 120 of FIG. 1 can perform various operations, and other details have been sufficiently explained previously, so these will be replaced.

Meanwhile, even though all the components constituting the embodiment of the present invention are described as being combined or operating in combination, the present invention is not necessarily limited to this embodiment. That is, as long as it is within the scope of the purpose of the present invention, all of the components may be operated by selectively combining one or more of them. In addition, although all of the components may be implemented as a single independent hardware, a program module in which some or all of the components are selectively combined to perform some or all of the combined functions in one or more pieces of hardware. It may also be implemented as a computer program having. The codes and code segments that make up the computer program can be easily deduced by a person skilled in the art of the present invention. Such computer programs can be stored in non-transitory computer readable media and read and executed by a computer, thereby implementing embodiments of the present invention.

Here, a non-transitory readable recording medium refers to a medium that stores data semi-permanently and can be read by a device, rather than a medium that stores data for a short period of time, such as a register, cache, or memory. . Specifically, the above-described programs may be stored and provided on non-transitory readable recording media such as CD, DVD, hard disk, Blu-ray disk, USB, memory card, ROM, etc.

In the above, preferred embodiments of the present invention have been shown and described, but the present invention is not limited to the specific embodiments described above, and may be used in the technical field to which the invention pertains without departing from the gist of the invention as claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be understood individually from the technical idea or perspective of the present invention.

100: optical fiber sensor 105: user terminal device
110: communication network 120; crisis management device
400: Communication interface unit 410: Control unit
420: Terrain change crisis management department 430: Storage department

Claims (10)

An optical fiber sensor installed in an area where ground subsidence, cut slope, or fill slope collapse is expected to detect changes in the topography of the area; and
By analyzing the detection signal of the optical fiber sensor, when subsidence or collapse is expected in the area, a risk warning is notified to the user terminal device of the user located in the designated range of the area, and to the manager terminal device of the manager managing the area. Includes a crisis management device to request risk management;
The optical fiber sensor is,
After installing an optical fiber cable in the area and transmitting a designated test signal through the optical fiber cable, it is configured to detect the characteristics of the feedback signal and detect changes in the terrain of the area according to the detection results,
The optical fiber sensor is,
The light source, LED or laser diode, is connected to the end of the optical fiber, and an optical sensor is connected to the part that receives the returning light to measure the amount of change in light.
The optical fiber sensor is,
When using an optical fiber cable already installed inside a manhole, construct another loop using an optical fiber cable to process signals through a distributor, transmit the test signal to detect terrain changes through the loop, and transmit the test signal to detect the change in terrain through the loop. When the transmitted test signal is fed back, the fed back signal is analyzed,
The crisis management device is,
Requesting the optical fiber sensor to generate the test signal and receiving a signal value for a feedback signal of the test signal generated according to the request,
The crisis management device is,
The first standard data that shows the characteristics related to ground subsidence and the second standard data that shows the characteristics related to the collapse of the cut slope or fill slope are pre-stored, and the analysis results of the detection signal provided in real time are stored as above. The type of crisis is determined based on the comparison results by comparing the first and second reference data respectively, and the characteristics of the feedback signal are analyzed to determine whether signal distortion occurs in all sections of the optical fiber cable and whether signal distortion occurs in some sections. We judge crisis situations differently by determining whether distortions occur.
The crisis management device is,
An optical fiber system that handles the risk of collapse by dividing it into multiple levels depending on the crisis detection level, and in the case of level 1, does not restrict traffic and notifies the terminal devices of the user and the manager as a caution level requiring vigilance during the passage. Crisis management system using sensors. According to paragraph 1,
The crisis management device is a crisis management system using an optical fiber sensor that determines the location of the user terminal device based on location information of the area and notifies the risk warning based on the location result. According to paragraph 1,
The crisis management device measures the distance or signal strength of the user terminal device provided from the communication device in charge of communication in the area, recognizes the user terminal device located in the designated range of the area, and notifies the risk warning through an optical fiber. Crisis management system using sensors. According to paragraph 1,
The crisis management device determines the sinking or collapse of the optical fiber when the comprehensive analysis results of the first and second signals respectively received from the first and second optical fiber sensors installed in the area satisfy preset conditions. Crisis management system using sensors. According to paragraph 1,
The crisis management device is a crisis management system using an optical fiber sensor that detects pressure changes by analyzing signals from the optical fiber sensor. An optical fiber sensor installed in an area where ground subsidence, cut slope, or fill slope collapse is expected to detect changes in the topography of the area; and
The crisis management device analyzes the detection signal of the optical fiber sensor, and when subsidence or collapse is expected in the area, it notifies a risk warning to the user terminal device of the user located in the designated range of the area, and the manager who manages the area Including a step of requesting the administrator terminal device to manage the risk,
The optical fiber sensor is,
After installing an optical fiber cable in the area and transmitting a designated test signal through the optical fiber cable, it is configured to detect the characteristics of the feedback signal and detect changes in the terrain of the area according to the detection results,
The optical fiber sensor is,
The light source, LED or laser diode, is connected to the end of the optical fiber, and an optical sensor is connected to the part that receives the returning light to measure the amount of change in light.
The optical fiber sensor is,
When using an optical fiber cable already installed inside a manhole, construct another loop using an optical fiber cable to process signals through a distributor, transmit the test signal to detect terrain changes through the loop, and transmit the test signal to detect the change in terrain through the loop. When the transmitted test signal is fed back, the fed back signal is analyzed,
Requesting, by the crisis management device, the generation of the test signal from the optical fiber sensor to receive a signal value for a feedback signal of the test signal generated according to the request;
The crisis management device stores first standard data that can determine the characteristics related to ground subsidence, and second standard data that can determine the characteristics related to the collapse of the cut slope or fill slope, and the detection signal provided in real time. The analysis results are compared with the stored first and second reference data, respectively, and the type of crisis is determined based on the comparison results. As a result of analyzing the characteristics of the feedback signal, it is determined whether signal distortion occurs in all sections of the optical fiber cable. and determining whether signal distortion occurs in some sections to determine the crisis situation differently. and
The crisis management device processes the risk of collapse by dividing it into multiple levels depending on the crisis detection level. In the case of level 1, it does not restrict traffic and is a caution level requiring vigilance when passing through the terminals of the user and the manager. Notifying the device;
A crisis management method using an optical fiber sensor, including further. According to clause 6,
The requesting step is,
A crisis management method using an optical fiber sensor that determines the location of the user terminal device based on location information of the area and notifies the danger warning based on the location result. According to clause 6,
The requesting step is,
A crisis management method using an optical fiber sensor that measures the distance or signal strength of a user terminal device provided from a communication device in charge of communication in the area, recognizes a user terminal device located in a designated range of the area, and notifies the risk warning. . According to clause 6,
The requesting step is,
A crisis management method using an optical fiber sensor that determines the sinking or collapse when the comprehensive analysis results of the first and second signals respectively received from the first and second optical fiber sensors installed in the area satisfy preset conditions. . According to clause 6,
The requesting step is,
A crisis management method using an optical fiber sensor that detects pressure changes by analyzing signals from the optical fiber sensor.