JP6248413B2 - Tsunami warning device, tsunami warning method, and tsunami warning system - Google Patents

Description

  The present invention relates to a tsunami warning device, a tsunami warning method, and a tsunami warning system.

  In recent years, awareness of disaster prevention is increasing, and it is required to detect the disaster area, scale, etc. of the disaster that occurred at the time of the disaster at an early stage. In particular, if the occurrence of a tsunami can be detected early, evacuation and disaster prevention measures can be implemented before the tsunami reaches the coast. Therefore, there is a strong social demand to detect tsunami occurrence early and with high accuracy.

  For example, Patent Document 1 discloses a technique for detecting the occurrence of a tsunami when a water flow having a speed equal to or higher than a certain value is detected near the seabed.

JP 2000-146588 A

  However, in the technique disclosed in Patent Document 1, even if the water flow is an abnormal water flow that cannot normally be generated, if the water flow does not have a certain speed or more, it was not detected as a tsunami generation.

  Specifically, when the threshold speed is high, the sensor disclosed in Patent Document 1 cannot detect the occurrence of a tsunami in the precursory water flow change that causes a huge tsunami. Only when it arrives will it detect the occurrence of a tsunami. Further, when the threshold speed is low, the sensor disclosed in Patent Document 1 erroneously detects a water flow or normal wave due to navigation of a ship as a tsunami occurrence. Therefore, the technique disclosed in Patent Document 1 has a problem that tsunami generation cannot be detected with high accuracy at a precursor stage.

  Therefore, the present invention has been made in view of the above problems, and the object of the present invention is to provide a new and improved tsunami warning device capable of detecting tsunami occurrence with high accuracy at an early stage, It is to provide a tsunami warning method and a tsunami warning system.

In order to solve the above problems, according to an aspect of the present invention, based on information acquired from a sensor discharge unit that discharges a floating water flow sensor installed in a river and an estuary, and the discharged water flow sensor A water flow state calculation unit that calculates a water flow state, a tsunami determination unit that determines the occurrence of a tsunami based on the water flow state and tide information, and a warning process based on the determination of the tsunami determination unit A tsunami warning unit, comprising: a warning control unit; and an approach detection unit that detects approach of the water flow sensor to the sluice, wherein the warning control unit controls opening and closing of the sluice gate based on the approach detection by the approach detection unit. An apparatus is provided.

  The tsunami determination unit may determine that a tsunami has occurred when any one of the calculated velocity and direction of the water flow is different from the water flow predicted from the tide information.

  The water flow state calculation unit may acquire position information of the water flow sensor from the water flow sensor, and calculate the state of the water flow from a change in the position information.

  When the approach detection unit detects the approach of the water flow sensor to the sluice gate, the warning control unit may close at least the sluice gate.

  When the approach detection unit detects that the water flow sensor has passed through the sluice gate, the warning control unit may close at least one sluice upstream of the sluice gate.

  The approach detection unit may detect the approach of the water flow sensor to the sluice based on whether a radio signal from the water flow sensor is received by an antenna.

  The approach detection unit may acquire position information of the water flow sensor from the water flow sensor, and detect an approach of the water flow sensor to the sluice from the position information.

It said sensor emitting portion, the tsunami determination of decision, or based on the water level rises, it may be released to the water flow sensor.

  The water flow state calculation unit may acquire information from a plurality of water flow sensors.

In order to solve the above-mentioned problem, according to another aspect of the present invention, a step of discharging a floating water flow sensor installed in a river and an estuary, and information acquired from the discharged water flow sensor are included. A step of calculating the state of the water flow, a step of determining the occurrence of a tsunami based on the state of the water flow and the tide information, a step of controlling a warning process based on the determination result of the occurrence of the tsunami, and the water flow Detecting the approach of the sensor to the sluice, and based on the detection of the approach of the water flow sensor to the sluice, the tsunami warning method is provided for controlling the opening and closing of the sluice as the warning process.

In order to solve the above problem, according to still another aspect of the present invention, a floating water flow sensor installed in a river and an estuary, a sensor discharge unit for discharging the water flow sensor, and a discharge Based on the information acquired from the water flow sensor, a water flow state calculation unit that acquires a water flow state, a tsunami determination unit that determines the occurrence of a tsunami based on the water flow state and tide information, and a determination by the tsunami determination unit A warning control unit that controls a warning process, and an approach detection unit that detects an approach of the water flow sensor to a sluice, and based on the approach detection by the approach detection unit, the alert control unit A tsunami warning system is provided to control the opening and closing of the sluice gate.

  As described above, according to the present invention, it is possible to detect the occurrence of a tsunami early and with high accuracy.

It is explanatory drawing explaining the outline of the tsunami warning device which concerns on the 1st Embodiment of this invention. It is the block diagram which showed the internal structure of the tsunami warning device and water flow sensor which concern on the embodiment. It is a flowchart figure explaining operation | movement of the tsunami warning apparatus which concerns on the same embodiment. It is explanatory drawing explaining the outline of the tsunami warning device which concerns on the 2nd Embodiment of this invention. It is the block diagram which showed the internal structure of the tsunami warning device which concerns on the same embodiment. It is explanatory drawing explaining the specific example in case the tsunami warning device which concerns on the embodiment performs a closure instruction | indication with respect to the sluice which exists upstream of a sluice. It is a flowchart explaining the operation | movement regarding the sluice closure of the tsunami warning device which concerns on the embodiment.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, the duplicate description is abbreviate | omitted by attaching | subjecting the same code | symbol.

<1. First Embodiment>
[1.1. Outline of Tsunami Warning Device According to First Embodiment]
First, an outline of a tsunami warning device according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is an explanatory diagram for explaining an outline of a tsunami warning device 1 according to the first embodiment of the present invention.

  As shown in FIG. 1, the tsunami warning device 1 according to the first embodiment of the present invention receives signals from at least one water flow sensor 3 installed in the ocean and river.

  The tsunami warning device 1 calculates the state of the water flow based on the information acquired from the water flow sensor 3, and performs a warning process if the tsunami is detected if the water flow state is a water flow state that cannot normally occur. . Specifically, the tsunami warning device 1 compares the direction and speed of the water flow calculated from the information acquired from the water flow sensor 3 with the direction and speed of the normal water flow predicted from the tide information, and at least one of them. If one is different, it is determined that a tsunami has occurred. Further, when the tsunami warning device 1 determines that a tsunami has occurred, the tsunami warning processing, for example, issues a tsunami warning, calls for evacuation, and closes a sluice gate.

  The water flow sensor 3 is installed in the ocean and river, and transmits information for calculating the state of the water flow at the installation location to the tsunami warning device 1. For example, the water flow sensor 3 is a floating water flow sensor that is not fixed to the seabed and quay with a rod or the like. The water flow sensor 3 acquires position information of the water flow sensor 3 by, for example, GPS (Global Positioning System), and transmits the position information to the tsunami warning device 1 together with the identification ID of the water flow sensor 3. Further, the water flow sensor 3 repeatedly transmits the position information and identification ID of the water flow sensor 3 to the tsunami warning device 1 at a predetermined timing (for example, at intervals of 1 to 10 seconds). Therefore, the tsunami warning device 1 can calculate the direction and speed of the water flow by calculating the moving direction and moving amount per unit time of the water flow sensor 3 from the position information of the water flow sensor 3.

  In the following, the water flow sensor 3 will be described as an unfixed floating type water flow sensor described above. However, the present invention is not limited to such illustration. For example, the water flow sensor 3 may be a floating water flow sensor fixed to the sea floor and a quay with a rod or the like, or may be a fixed water flow sensor installed on the sea floor or the like. Further, when the water flow sensor 3 is a floating water flow sensor or a fixed water flow sensor fixed to the sea floor and a quay with a rod or the like, the water flow sensor 3 measures the direction and speed of the water flow, The speed may be transmitted to the tsunami warning device 1 together with the identification ID of the water flow sensor 3. Here, various known methods can be used as a method by which the water flow sensor 3 measures the direction and speed of the water flow.

  Moreover, in FIG. 1, although the water flow sensor 3 is installed in the river mouth and the ocean, the 1st Embodiment of this invention is not limited to said illustration. For example, the water flow sensor 3 may be installed in the middle of a river. However, it is more preferable that the water flow sensor 3 be installed in the vicinity of the estuary and the coast in order to detect early signs of a tsunami generated in the ocean and to communicate with the tsunami warning device 1 quickly.

  Furthermore, it is preferable that a plurality of water flow sensors 3 are installed in order to detect a tsunami with higher accuracy. Unlike the waves generated by wind and ship navigation, tsunami is the movement of the whole seawater by moving up and down the seabed, so the water flow in the vicinity of the area where the tsunami occurred has the same direction and speed. Therefore, by installing a plurality of water flow sensors 3, it is possible to compare whether the water flow at the point where each water flow sensor 3 is installed has the same direction and speed, so that more accurate tsunami detection can be performed. Can do.

  The outline of the tsunami warning device 1 according to the first embodiment of the present invention has been described above with reference to FIG. The tsunami warning device 1 according to the first embodiment of the present invention compares the water flow state calculated from the information acquired from the water flow sensor 3 with the water flow state predicted from the tide information. Therefore, since the tsunami warning device 1 can detect an abnormal water flow state that cannot normally occur at an early stage, it is possible to detect a tsunami early and with high accuracy at an abnormal water flow stage that is a precursor. is there.

[1.2. Internal Configuration of Tsunami Warning Device According to First Embodiment]
Next, with reference to FIG. 2, the internal configurations of the tsunami warning device 1 and the water flow sensor 3 according to the first embodiment of the present invention will be specifically described. FIG. 2 is a block diagram showing an internal configuration of the tsunami warning device 1 and the water flow sensor 3 according to the first embodiment of the present invention.

(1.2.1. Internal structure of water flow sensor)
First, the internal configuration of the water flow sensor 3 will be described. As shown in FIG. 2, the water flow sensor 3 includes a GPS signal receiving unit 300, a sensor control unit 310, and a sensor communication unit 320.

  The GPS signal receiving unit 300 receives radio waves from a plurality of GPS satellites and calculates position information of the water flow sensor 3. Specifically, the GPS signal receiving unit 300 receives radio waves from a plurality of GPS satellites, and determines the position information of the water flow sensor 3 by calculating the distance from each GPS satellite. In addition, the GPS signal reception unit 300 performs differential GPS (Differential GPS) that further receives a radio signal from a fixed station whose accurate position coordinates are known, in order to correct the position information and improve accuracy. May be.

  The sensor control unit 310 controls the overall operation of the water flow sensor 3 by controlling the GPS signal receiving unit 300 and the sensor communication unit 320. Specifically, the sensor control unit 310 assigns an identification ID for identifying the water flow sensor 3 to the position information of the water flow sensor 3 calculated by the GPS signal receiving unit 300, and alerts the tsunami via the sensor communication unit 320. Transmit to device 1. Here, the sensor control unit 310 repeatedly transmits the position information and identification ID of the water flow sensor 3 to the tsunami warning device 1 at a predetermined timing (for example, at intervals of 1 to 10 seconds) preferable for grasping the state change of the water flow. To do. Further, the sensor control unit 310 may transmit a signal other than the signal for transmitting the position information from the sensor communication unit 320. The sensor control unit 310 may be, for example, a CPU (Central Processing Unit).

  The sensor communication unit 320 transmits a signal to the tsunami warning device 1. For example, the sensor communication unit 320 may perform multi-hop communication using a wireless ad hoc network to the tsunami warning device 1 and transmit a wireless signal. Various known techniques can be used for the shape and the like of the antenna included in the sensor communication unit 320.

(1.2.2. Internal structure of tsunami warning device)
Next, the internal configuration of the tsunami warning device 1 will be described. As shown in FIG. 2, the tsunami warning device 1 includes a device communication unit 100, a water flow state calculation unit 110, a tide information storage unit 120, a tsunami determination unit 130, and a warning control unit 140.

  The device communication unit 100 receives a signal from the water flow sensor 3. For example, the device communication unit 100 is an antenna that receives a radio signal from the water flow sensor 3. The device communication unit 100 may have any antenna shape as long as it can receive a radio signal from the sensor communication unit 320 of the water flow sensor 3.

  The water flow state calculation unit 110 calculates the water flow state based on the information acquired from the water flow sensor 3. Specifically, the water flow state calculation unit 110 obtains the position information and identification ID of the water flow sensor 3 from the water flow sensor 3, and determines the movement direction and the movement amount per unit time of the water flow sensor 3 from the fluctuation amount of the position information. calculate. Furthermore, the water flow state calculation unit 110 calculates the direction and speed of the water flow at the position where the water flow sensor 3 exists from the movement direction and the movement amount of the water flow sensor 3 per unit time. Here, when there are a plurality of water flow sensors 3, the water flow state calculation unit 110 calculates, for each of the water flow sensors 3, the direction and speed of the water flow at the position where the water flow sensor 3 exists.

  In the case where the water flow sensor 3 is a water flow sensor that is fixed to the seabed and quay with a rod or the like and can measure the direction and speed of the water flow, the water flow state calculation unit 110 uses the measurement result of the water flow sensor 3 as it is. The direction and speed of the water flow at the point where 3 is installed may be used.

  The tide information storage unit 120 is a storage device that stores tide information of the estuary and the ocean where the water flow sensor 3 is installed. Specifically, the tide information storage unit 120 stores the fluctuation prediction of the water level due to the tide of the river mouth and the ocean where the water flow sensor 3 is installed as the water level and the fluctuation amount of the water level at each date and time. The tide information storage unit 120 may be realized by a storage device for data storage such as an HDD (Hard Disk Drive), for example.

  The tsunami determining unit 130 determines whether a tsunami has occurred based on the water flow state calculated by the water flow state calculating unit 110 and the tide information stored in the tide information storage unit 120. Specifically, first, the tsunami determination unit 130 acquires the water flow state calculated by the water flow state calculation unit 110. Next, a normal water flow at the same time as the water flow state calculated by the water flow state calculation unit 110 is predicted based on the tide information stored in the tide information storage unit 120. Furthermore, the tsunami determination unit 130 compares the water flow state calculated by the water flow state calculation unit 110 with the normal water flow predicted from the tide information. Here, when the calculated direction and speed of the water flow state are different from at least one of the normal water flow direction and speed predicted from the tide information in a predetermined time width, the tsunami determination unit 130 generates a tsunami. Judge that

  Here, the normal water flow information predicted from the tide information stores the speed and the like together with the water level information at each date and time of the tide information. Alternatively, the flow rate information is stored for each water level at the relevant point, and the amount of water flowing from the ocean to the relevant point (or flowing out) is calculated based on the difference between the predicted flow rate before and after the fluctuation. It is also possible to calculate by subtracting (or adding) to the average flow velocity at the point.

  More specifically, for example, the tsunami determining unit 130 determines that a tsunami has occurred when the direction of the calculated water flow state differs from the normal water flow direction predicted from the tide information by a predetermined time width. Also good. In addition, for example, the tsunami determination unit 130 may determine that a tsunami has occurred when the calculated water flow velocity differs from the normal water flow velocity predicted from the tide information by a predetermined time width. . Further, for example, the tsunami determination unit 130 determines that the tsunami is determined when the calculated water flow state is all in one direction with respect to the normal water flow predicted from the tide information at a plurality of locations in a predetermined time width. It may be determined that has occurred.

  In particular, it may be determined that there is a high possibility of a tsunami when the speed of the water flow is faster than the predicted value based on the tide information and is directed upstream. Furthermore, in such a case, it is also possible to refer to whether or not the water level is higher than the predicted value, and to determine that the water level is higher than the predicted value.

  Further, when the water flow velocity is faster than the predicted value by the tide information and is directed in the downstream direction, and the water level is lower than the predicted value, it may be determined that it is a sign of a tsunami. In such a case, it is possible to exclude a case where the flow velocity is increased simply due to water increase. Note that the value of the fluctuation of the water flow speed and the water level may be a value having a predetermined width in consideration of an error.

  The alert control unit 140 controls the alert process based on the determination of the tsunami determination unit 130. Specifically, when the tsunami determining unit 130 determines that a tsunami has occurred, the warning control unit 140 performs warning processing, for example, issues a warning, calls for evacuation, and closes a sluice gate, Take countermeasures. In addition, the alert control unit 140 may perform alert processing for alerting and countermeasures against the tsunami on the connected external device. For example, the alert control unit 140 may instruct a sound output device such as a speaker to issue a warning and call for evacuation, or may instruct a display device such as an electric bulletin board to issue a warning and call for evacuation. May be.

  Here, the water flow state calculation unit 110, the tsunami determination unit 130, and the warning control unit 140 are, for example, a CPU that is an arithmetic processing unit, a ROM (Read Only Memory) that stores programs used by the CPU, calculation parameters, and the like. It may be realized by a RAM (Random Access Memory) that temporarily stores a program used in the execution of the CPU, a parameter that changes as appropriate in the execution, and the like.

[1.3. Operation of Tsunami Warning Device According to First Embodiment]
The internal configuration of the tsunami warning device 1 according to the first embodiment of the present invention has been described above. Below, with reference to FIG. 3, the operation | movement which the tsunami warning apparatus 1 which concerns on the 1st Embodiment of this invention mentioned above performs is demonstrated. FIG. 3 is a flowchart for explaining the operation of the tsunami warning device 1 according to the first embodiment of the present invention.

  As shown in FIG. 3, first, the device communication unit 100 acquires information necessary for calculating the water flow state from the water flow sensor 3 (S100). Here, the information necessary for calculating the water flow state is, for example, position information and identification ID of the water flow sensor 3. Next, the water flow state calculation unit 110 calculates the movement direction and amount of movement of the water flow sensor 3 per unit time from the information acquired from the water flow sensor 3, and calculates the water flow state at the position where the water flow sensor 3 exists. (S110). Subsequently, the tsunami determining unit 130 calculates a normal water flow state predicted based on the tide information stored in the tide information storage unit 120 (S120).

  Moreover, the tsunami judgment part 130 compares whether the water flow state calculated from the information of the water flow sensor 3 and the normal water flow state estimated from the tide information differ (S130). Here, when the water flow state calculated from the information of the water flow sensor 3 and the normal water flow state predicted from the tide information are the same (S130 / No), the tsunami determination unit 130 determines that no tsunami has occurred. To do. In such a case, the tsunami warning device 1 acquires again the position information of the water flow sensor 3 transmitted from the water flow sensor 3 at a predetermined timing (for example, at intervals of 1 to 10 seconds), and repeats the operations after S100.

  On the other hand, when the water flow state calculated from the information of the water flow sensor 3 and the normal water flow state predicted from the tide information are different (S130 / Yes), the tsunami determination unit 130 determines that a tsunami has occurred (S140). In such a case, the alert control unit 140 performs an alert process based on the determination of the tsunami determining unit 130 (S150). Specific contents of the warning process performed by the warning control unit 140 are, for example, issuing a warning, calling for evacuation, and closing a sluice as described above.

[1.4. Summary of First Embodiment]
The configuration and operation of the tsunami warning device 1 according to the first embodiment of the present invention have been described above. According to the tsunami warning device 1 according to the first embodiment of the present invention, it is possible to detect a water flow state different from a normal water flow predicted from tide information. For example, the tsunami warning device 1 can detect the occurrence of a tsunami at an early stage by detecting a water flow to the sea side at an abnormal speed that has occurred as a precursor of a tsunami.

  Therefore, since the tsunami warning device 1 can detect an abnormal water flow state that is a precursor of a tsunami, it is possible to detect a tsunami at an early stage and perform a warning process such as issuing an alarm. .

<2. Second Embodiment>
[2.1. Outline of Tsunami Warning Device According to Second Embodiment]
Next, an outline of a tsunami warning device according to the second embodiment of the present invention will be described with reference to FIG. FIG. 4 is an explanatory diagram for explaining the outline of the tsunami warning device 2 according to the second embodiment of the present invention.

  As shown in FIG. 4, the tsunami warning device 2 according to the second embodiment of the present invention is connected to a sluice gate 7 installed in a river and further installed in the vicinity of the sluice gate 7, and a signal transmitted from the water flow sensor 4. Is connected to the wireless signal receiving device 5 capable of receiving the signal. The water flow sensor 4 is a floating type water flow sensor, and goes up upstream from the river mouth by a tsunami or the like by a tsunami or the like.

  Here, when a tsunami or the like is going up the river, damage such as the tsunami can be reduced by closing the sluice 7 and preventing the tsunami or the like from going up. The tsunami warning device 2 according to the second embodiment of the present invention detects the approach to the sluice 7 such as a tsunami by the approach to the sluice 7 of the water flow sensor 4 that goes up the river together with the tsunami and the like, and automatically The sluice 7 is closed. With such a configuration, the tsunami warning device 2 according to the second embodiment of the present invention can reduce damage such as tsunami.

  In addition, the tsunami warning device 2 according to the second embodiment of the present invention controls a plurality of sluice gates when making a closure judgment of the sluice gates 7, and is a sluice control system (see FIG. It is not necessary to ask for judgment. Therefore, the tsunami warning device 2 according to the second embodiment of the present invention can automatically close the sluice gate 7 even when communication between the sluice control system and the tsunami warning device 2 and the sluice gate 7 is disconnected. is there.

  When the tsunami warning device 2 detects the approach of the water flow sensor 4 to the sluice 7, the tsunami warning device 2 performs closing control of the sluice 7. Specifically, the tsunami warning device 2 determines that the water flow sensor 4 has approached the water gate 7 when the wireless signal receiving device 5 installed in the vicinity of the water gate 7 receives a signal from the water flow sensor 4. Control to close the sluice 7 is performed. In addition, when the tsunami warning device 2 detects that the water flow sensor 4 has passed through the sluice 7, the tsunami warning device 2 may instruct the sluice existing upstream of the sluice 7 to close. It is desirable that the tsunami warning device 2 and the sluice gate 7 are directly connected by wire so that the connection is not easily cut off by a disaster such as an earthquake or a tsunami.

  The water flow sensor 4 is, for example, an unfixed floating water flow sensor similar to the water flow sensor 3 described in the first embodiment, and is a water flow sensor capable of transmitting a radio signal. The radio signal transmitted by the water flow sensor 4 may be a dedicated radio signal or a signal for transmitting the position information of the water flow sensor 4 described in the first embodiment.

  However, since the receivable distance of the radio signal varies depending on the transmission intensity, the radio signal transmitted by the water flow sensor 4 is preferably a dedicated radio signal having an appropriate transmission intensity. Specifically, the transmission intensity of the radio signal transmitted from the water flow sensor 4 is the time from when the tsunami warning device 2 detects the approach of the water flow sensor 4 to the sluice 7 until the sluice 7 is closed. It is desirable that the time is set shorter than the time until the tsunami reaches 7.

  In the following description, the water flow sensor 4 will be described as an unfixed floating water flow sensor described above. However, the present invention is not limited to such illustration. For example, the water flow sensor 4 is a buoy or buoy for transmitting a radio signal emitted by a floating water flow sensor fixed on the seabed and quay with a rod or the like, or a fixed water flow sensor installed on the seabed or the like. Also good.

  The radio signal receiving device 5 is an antenna that can receive a radio signal from the water flow sensor 4, and is installed in the vicinity of the water gate 7. For example, the radio signal receiving device 5 may be installed attached to the sluice 7. The radio signal receiving device 5 may have any antenna shape and transmission method as long as it can receive a radio signal from the water flow sensor 4.

  Here, the radio signal receiving device 5 may be installed on the downstream side of the water gate 7. Since the water flow sensor 4 goes up from the downstream together with the tsunami, the radio signal receiving device 5 is preferably installed downstream of the water gate 7 in order to receive the radio signal from the water flow sensor 4 at an earlier stage.

  Further, the radio signal receiving device 5 may be installed both upstream and downstream of the sluice 7. In such a case, the tsunami warning device 2 determines whether the water flow sensor 4 has approached the sluice gate 7 from upstream or downstream depending on which of the wireless signal receiving devices installed downstream and upstream has received the wireless signal first. can do. Therefore, for example, when the upstream water flow sensor 4 flows out due to river flooding instead of a tsunami and approaches the downstream sluice 7 or when the water flow sensor 4 that has been run up after the tsunami has settled flows downstream. In addition, the tsunami warning device 2 can prevent the river flow from being blocked by closing the sluice 7 except for the purpose of preventing the tsunami from going up. Further, the radio signal receiving device 5 is installed both upstream and downstream of the sluice 7 so that the tsunami warning device 2 can determine whether or not the water flow sensor 4 has passed the sluice 7 upstream. become.

[2.2. Internal Configuration of Tsunami Warning Device According to Second Embodiment]
Then, with reference to FIG. 5, the internal structure of the tsunami warning apparatus 2 which concerns on the 2nd Embodiment of this invention is demonstrated concretely. FIG. 5 is a block diagram showing an internal configuration of the tsunami warning device 2 according to the second embodiment of the present invention.

  As shown in FIG. 5, the tsunami warning device 2 includes a device communication unit 100, a water flow state calculation unit 110, a tide information storage unit 120, a tsunami determination unit 130, a warning control unit 140, and a sensor discharge unit 150. , An approach detection unit 160. Here, the water flow sensor 4A is a water flow sensor that is installed in the ocean or estuary and detects a tsunami at an early stage. The water flow sensor 4B is a floating water flow sensor that is not fixed. It is a water flow sensor for informing the tsunami warning device 2 that it is going up.

  The device communication unit 100, the water flow state calculation unit 110, the tide information storage unit 120, and the tsunami determination unit 130 are as described in the first embodiment with reference to FIG. Description is omitted.

  The alert control unit 140 controls the alert process based on the determination of the tsunami determination unit 130 and the instruction of the approach detection unit 160. Specifically, when the tsunami determining unit 130 determines that a tsunami has occurred, the warning control unit 140 issues, for example, a warning or calls for evacuation as a warning process. Further, the alert control unit 140 closes the sluice 7 when the approach detection unit 160 instructs the sluice to be closed. Further, the warning control unit 140 may instruct at least one or more sluices existing upstream of the sluice 7 according to an instruction from the approach detection unit 160.

  The sensor discharge unit 150 discharges the floating water flow sensor 4B based on the determination of the tsunami determination unit 130. For example, when the water flow sensor 4A installed in the ocean or estuary is a floating water flow sensor fixed to the seabed and quay with a rod or the like, or a fixed waterflow sensor installed on the seabed or the like, the water flow sensor 4A is There may be cases where the river does not run up with the tsunami. Even in such a case, when the sensor discharge unit 150 discharges the floating water flow sensor 4B, the tsunami warning device 2 indicates that the tsunami or the like is approaching the water gate 7 and the sluice of the floating water flow sensor 4B. It can be detected by approaching 7.

  Specifically, the sensor discharge unit 150 discharges the floating water flow sensor 4B when the tsunami determination unit 130 determines that a tsunami has occurred. Further, the sensor discharge unit 150 may discharge the floating water flow sensor 4B due to a rapid rise or fall of the water level, which is a sign of a tsunami, a water flow direction abnormality, and a water flow velocity abnormality. Here, in order to grasp in more detail how the tsunami or the like is going up the river from the ocean upstream, the place where the sensor discharge unit 150 discharges the floating water flow sensor 4B is as follows: An estuary or ocean is preferred.

  The approach detection unit 160 determines whether the water flow sensor 4A or 4B has approached the water gate 7. Specifically, when the wireless signal receiving device 5 receives the wireless signal from the water flow sensor 4A or 4B, the approach detection unit 160 determines that the water flow sensor 4A or 4B has approached the sluice gate 7, and the warning control unit Instruct 140 to close the sluice 7.

  Moreover, when the water flow sensor 4A or 4B determines that the water flow sensor 4A or 4B has passed the sluice 7 upstream, the approach detection unit 160 may instruct the sluice existing upstream of the sluice 7 to close. For example, after the water flow sensor 4A or 4B approaches the water gate 7, the approach detection unit 160 cannot receive the wireless signal from the water flow sensor 4A or 4B, and the water flow sensor 4A or 4B is not connected to the water gate 7. When it is detected that the water has moved away, it may be determined that the water flow sensor 4A or 4B has passed the sluice 7 upstream.

  As described above, when the wireless signal receiving device 5 is installed both upstream and downstream of the sluice 7, the proximity detection unit 160 detects that the water flow sensor 4A or 4B is from either upstream or downstream of the sluice 7. Can be determined. In such a case, the approach detection unit 160 does not instruct to close the sluice 7 when the water flow sensor 4A or 4B approaches the sluice 7 from the upstream, but only instructs to close the sluice 7 when the water flow sensor 7 approaches from the downstream. May be. Further, the approach detection unit 160 determines whether the water flow sensor 4 detects the sluice 7 depending on whether or not the radio signal receiving devices 5 installed both upstream and downstream of the sluice 7 can receive a radio signal from the water flow sensor 4A or 4B. It may be determined whether or not it has passed upstream.

  Further, when the water flow sensor 4A or 4B is transmitting position information, the approach detection unit 160 may acquire the position information of the water flow sensor 4A or 4B from the device communication unit 100. In this case, the approach detection unit 160 determines whether or not the water flow sensor 4A or 4B has approached the water gate 7 based on the position information of the water flow sensor 4A or 4B instead of the notification from the wireless signal receiving device 5. Is possible. Even when the position information of the water flow sensor 4A or 4B is referred to, the approach detection unit 160 can determine whether the water flow sensor 4A or 4B has approached the water gate 7 from the upstream side or the downstream side in the same manner as described above. . The approach detection unit 160 can also determine whether the water flow sensor 4A or 4B has passed through the water gate 7.

  Here, in the said embodiment, although the sensor discharge part 150 demonstrated as the tsunami warning apparatus 2 was provided, this invention is not limited to the said illustration. For example, the sensor discharge part 150 may be provided in the water flow sensor 4A. In this case, specifically, the water flow sensor 4A is a floating water flow sensor in which the water flow sensor 4A installed in the ocean or estuary is fixed to the sea floor and the quay with a rod or the like. The water flow sensor 4A may discharge a floating water flow sensor, a buoy, a buoy, or the like due to, for example, a rapid rise or fall of the water level, which is a precursor of a tsunami, an abnormal direction of the water flow, and an abnormal velocity of the water flow.

  The approach detection unit 160 includes, for example, a CPU that is an arithmetic processing unit, a ROM that stores programs used by the CPU, calculation parameters, and the like, programs used in the execution of the CPU, parameters that change as appropriate in the execution, and the like. May be realized by a RAM or the like that temporarily stores.

[2.3. Specific example of sluice closure performed by tsunami warning device according to second embodiment]
As described above, the tsunami warning device 2 according to the second embodiment of the present invention can close the sluice 7 when the water flow sensor 4 approaches the sluice 7. Further, when the tsunami warning device 2 detects that the water flow sensor 4 has passed through the sluice 7, the tsunami warning device 2 may issue a closing instruction to at least one sluice existing upstream of the sluice 7. Below, with reference to FIG. 6, the specific example in case the tsunami warning device 2 which concerns on the 2nd Embodiment of this invention performs a closure instruction | indication with respect to the at least 1 or more sluice which exists upstream of the sluice 7 Will be described. FIG. 6 is an explanatory diagram for explaining a specific example when the tsunami warning device 2 according to the second embodiment of the present invention issues a closing instruction to the sluice existing upstream of the sluice 7.

  As shown in FIG. 6, sluices 710 to 770 are installed in a river divided into a plurality of tributaries. Here, when the water flow sensor (water flow sensor 41) approaches the sluice 710, the tsunami warning device 2 closes the sluice 710. When the water flow sensor (water flow sensor 43) passes through the sluice 710, the tsunami warning device 2 issues a closing instruction to the sluice that exists one upstream of the sluice 710.

  Specifically, when the water flow sensor (water flow sensor 43) passes through the sluice 710, the tsunami warning device 2 instructs the sluices 720 and 740 to close. Similarly, when the water flow sensor (water flow sensor 45) passes the sluice 720, the tsunami warning device 2 instructs the sluice 730 to close. When the water flow sensor (water flow sensor 47) passes through the sluice 740, the tsunami warning device 2 instructs the sluices 750 and 770 to close. Furthermore, when the water flow sensor (water flow sensor 49) passes through the sluice 750, the tsunami warning device 2 instructs the sluice 760 to close.

  Here, for example, when the water flow sensor (water flow sensor 43) passes through the water gate 710, the tsunami warning device 2 may instruct the water gates 720 to 770 to close. However, if sluice gates unrelated to tsunamis are closed at once, river flooding may occur in some cases. Therefore, it is preferable that the tsunami warning device 2 is instructed to close only the sluice gate that exists upstream one of the sluice gates through which the water flow sensor has passed as described above and is likely to receive a tsunami or the like.

[2.4. Operation of Tsunami Warning Device According to Second Embodiment]
The configuration of the tsunami warning device 2 according to the second embodiment of the present invention has been described above. Below, with reference to FIG. 7, the operation | movement regarding the sluice closure which the tsunami warning apparatus 2 which concerns on the 2nd Embodiment of this invention mentioned above performs is demonstrated. FIG. 7 is a flowchart for explaining the operation related to the sluice closure of the tsunami warning device 2 according to the second embodiment of the present invention. In addition, about the operation | movement regarding the detection of the tsunami generation | occurrence | production which the tsunami warning apparatus 2 which concerns on the 2nd Embodiment of this invention performs is the same as that of description in 1st Embodiment, description here is abbreviate | omitted.

  As shown in FIG. 7, first, the tsunami determination unit 130 determines the occurrence of a tsunami, and the warning control unit 140 performs a warning process such as issuing a warning (S200). Here, the sensor discharge unit 150 may discharge the water flow sensor 4B based on the tsunami generation determination by the tsunami determination unit 130. Next, the approach detection unit 160 determines whether or not the water flow sensor 4A or 4B has approached the sluice 7 (S210). When the approach detection unit 160 determines that the water flow sensor 4A or 4B is not approaching the sluice 7 (S210 / No), the tsunami warning device 2 detects the approach of the water flow sensor 4A or 4B to the sluice 7 Wait until.

  Further, when the approach detection unit 160 determines that the water flow sensor 4A or 4B has approached the sluice 7 (S210 / Yes), the warning control unit 140 performs control to close the sluice 7 to which the water flow sensor 4A or 4B has approached. (S220). Next, the approach detection unit 160 determines whether the water flow sensor 4A or 4B has passed through the water gate 7 (S230). When the approach detection unit 160 determines that the water flow sensor 4A or 4B does not pass the sluice 7 (S230 / No), the tsunami warning device 2 determines that the tsunami can be prevented from going up, and ends the warning process. To do. If the approach detection unit 160 determines that the water flow sensor 4A or 4B has passed through the sluice gate 7 (S230 / Yes), the warning control unit 140 determines that the tsunami run-up has not been prevented, and The closure instruction is given to the sluice existing upstream.

[2.5. Summary of Second Embodiment]
The configuration and operation of the tsunami warning device 2 according to the second embodiment of the present invention have been described above. According to the tsunami warning device 2 according to the second embodiment of the present invention, when a tsunami or the like goes up a river, the sluice is automatically closed to prevent the tsunami or the like from going up, and damage from the tsunami. Can be reduced. Moreover, according to the tsunami warning device 2 according to the second embodiment of the present invention, the sluice gate 7 can be automatically closed without communication and instruction with the sluice control system installed in the remote area of the sluice gate. Is possible.

<3. Summary>
The tsunami warning device according to the present invention has been described above. According to the tsunami warning device according to the present invention, it is possible to detect the occurrence of a tsunami early and with high accuracy. Moreover, according to the tsunami warning device according to the present invention, even when a tsunami occurs, the sluice gate is automatically closed, and the damage of the tsunami or the like is reduced by preventing the tsunami or the like from going up the river. Is possible.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1, 2 Tsunami warning device 3, 4, 4A, 4B Water flow sensor 5 Wireless signal receiver 7 Water gate 100 Device communication part 110 Water flow state calculation part 120 Tidal information storage part 130 Tsunami judgment part 140 Warning control part 150 Sensor discharge part 160 Approach Detection unit 300 GPS signal reception unit 310 Sensor control unit 320 Sensor communication unit

Claims (11)

A sensor discharge unit that discharges a floating flow sensor installed in a river and estuary;
Based on the information acquired from the released water flow sensor, a water flow state calculation unit that calculates the state of the water flow,
A tsunami determination unit that determines the occurrence of a tsunami based on the water flow state and tide information;
Based on the determination of the tsunami determination unit, a warning control unit that controls the warning process,
An approach detector for detecting the approach of the water flow sensor to the sluice;
With
The tsunami warning device, wherein the warning control unit controls opening and closing of the sluice gate based on approach detection by the approach detection unit.   2. The tsunami warning device according to claim 1, wherein the tsunami determination unit determines that a tsunami has occurred when any one of the calculated velocity and direction of the water flow is different from the water flow predicted from the tide information. .   The tsunami warning device according to claim 2, wherein the water flow state calculation unit acquires position information of the water flow sensor from the water flow sensor and calculates the state of the water flow from a change in the position information.   2. The tsunami warning device according to claim 1, wherein when the approach detection unit detects an approach of the water flow sensor to the sluice gate, the warning control unit closes at least the sluice gate.   2. The tsunami warning according to claim 1, wherein when the approach detection unit detects that the water flow sensor has passed through the sluice gate, the warning control unit closes at least one sluice upstream of the sluice gate. apparatus.   The tsunami warning device according to claim 4 or 5, wherein the approach detection unit detects approach of the water flow sensor to a sluice gate based on whether or not a radio signal from the water flow sensor is received by an antenna.   The tsunami warning device according to claim 4 or 5, wherein the approach detection unit acquires position information of the water flow sensor from the water flow sensor, and detects an approach of the water flow sensor to the sluice from the position information. Said sensor emitting portion, the tsunami determination of decision, or based on the water level rises and discharged the water flow sensor, the tsunami warning device according to claim 7.   The tsunami warning device according to claim 8, wherein the water flow state calculation unit acquires information from a plurality of water flow sensors. Discharging a floating water flow sensor installed in the river and estuary;
Calculating the state of the water flow based on the information obtained from the released water flow sensor;
Determining the occurrence of a tsunami based on the state of the water flow and tide information;
A step of controlling a warning process based on a determination result of the tsunami occurrence;
Detecting the approach of the water flow sensor to a sluice;
Including
A tsunami warning method for controlling the opening and closing of the sluice gate as the caution process based on detection of the water flow sensor approaching the sluice gate. Floating water flow sensors installed in rivers and estuaries ,
A sensor discharge section for discharging the water flow sensor;
Based on the information acquired from the released water flow sensor, a water flow state calculation unit that acquires the state of the water flow,
A tsunami determination unit that determines the occurrence of a tsunami based on the water flow state and tide information;
Based on the determination of the tsunami determination unit, a warning control unit that controls the warning process,
An approach detector for detecting the approach of the water flow sensor to the sluice;
With
The tsunami warning system in which the warning control unit controls opening and closing of the sluice gate based on the approach detection by the approach detection unit.

Images