WO2022201342A1 - 雷撃検出装置、雷撃検出システム及び雷撃検出方法 - Google Patents
雷撃検出装置、雷撃検出システム及び雷撃検出方法 Download PDFInfo
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- 208000025274 Lightning injury Diseases 0.000 abstract 8
- 230000006870 function Effects 0.000 description 17
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- 238000010586 diagram Methods 0.000 description 14
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- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 238000004891 communication Methods 0.000 description 8
- 239000000835 fiber Substances 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
Definitions
- the present disclosure relates to lightning detection devices and the like.
- Patent Document 1 discloses a technique for detecting the location of an accident in an overhead transmission line. That is, in the technique described in Patent Document 1, an accident detection device and an impact application device are installed on each steel tower that supports an optical fiber composite ground wire (OPGW). Orientation devices are installed at both ends of the OPGW. More specifically, a primary orientation device is installed at one end of the OPGW, and a secondary orientation device is installed at the other end of the OPGW (paragraphs [0026] to [0028] of Patent Document 1, FIG. 1 etc.).
- OPGW optical fiber composite ground wire
- the corresponding impact application device applies an impact to the OPGW.
- the application of such a shock changes the polarization state of light propagating through the optical fiber of the OPGW.
- the locating device locates the pylon where the occurrence of the accident has been detected by obtaining the position where the change in the state of polarization has occurred. As a result, the position where the accident occurred is located (see claim 1, paragraph [0029], paragraphs [0035] to [0045], etc. of Patent Document 1).
- Patent Document 1 also discloses a technique for locating the location of a lightning strike on an overhead power transmission line.
- the method of locating the location of the lightning strike is the same as the method of locating the location of the accident (claim 6 of Patent Document 1, paragraphs [0046] to [0048], See Fig. 6, etc.).
- Patent Document 1 In the technique described in Patent Document 1, a dedicated device (more specifically, an accident detection device, an impact application device, etc.) is installed on each steel tower (see Figs. 1 and 6 of Patent Document 1). There is a problem that the configuration of the system is complicated by including these devices.
- the present disclosure has been made to solve the above problems, and aims to provide a lightning detection device or the like that can detect the occurrence of a lightning strike with a simple system configuration that eliminates the need for these devices. aim.
- An embodiment of the lightning detection apparatus includes optical signal receiving means for receiving an optical signal including sensing information from an optical fiber network for detecting sensing information, and an optical fiber network using the sensing information included in the optical signal.
- lightning detection means for detecting the occurrence of a lightning strike in the sensor, the sensing information indicates at least the vibration pattern of the lightning strike, and the lightning detection means detects the occurrence of the lightning strike based on the vibration pattern.
- An embodiment of the lightning detection system includes optical signal receiving means for receiving an optical signal including sensing information from an optical fiber network for detecting sensing information, and an optical fiber network using the sensing information included in the optical signal.
- lightning detection means for detecting the occurrence of a lightning strike in the sensor, the sensing information indicates at least the vibration pattern of the lightning strike, and the lightning detection means detects the occurrence of the lightning strike based on the vibration pattern.
- the optical signal receiving means receives an optical signal including sensing information from an optical fiber network that detects sensing information, and the lightning strike detection means receives the sensing information included in the optical signal.
- the sensing information indicates at least the vibration pattern of the lightning strike, and the lightning detection means detects the occurrence of the lightning strike based on the vibration pattern.
- FIG. 1 is an explanatory diagram showing an example of a state in which optical fiber cables are installed on a plurality of steel towers by an aerial method.
- FIG. 2 is a block diagram showing the essential parts of the lightning strike detection system according to the first embodiment.
- FIG. 3 is a block diagram showing the hardware configuration of the main part of the lightning detection device according to the first embodiment.
- FIG. 4 is a block diagram showing another hardware configuration of the main part of the lightning detection device according to the first embodiment.
- FIG. 5 is a block diagram showing another hardware configuration of the main part of the lightning detection device according to the first embodiment.
- FIG. 6 is a flow chart showing the operation of the lightning detection device according to the first embodiment.
- FIG. 1 is an explanatory diagram showing an example of a state in which optical fiber cables are installed on a plurality of steel towers by an aerial method.
- FIG. 2 is a block diagram showing the essential parts of the lightning strike detection system according to the first embodiment.
- FIG. 3 is a block diagram showing the hardware configuration of
- FIG. 7A is an explanatory diagram showing an example of a frequency spectrum corresponding to a vibration pattern when no lightning strike occurs.
- FIG. 7B is an explanatory diagram showing an example of a frequency spectrum corresponding to a vibration pattern when a lightning strike occurs.
- FIG. 8A is an explanatory diagram showing an example of a time waveform corresponding to a vibration pattern when no lightning strike occurs.
- FIG. 8B is an explanatory diagram showing an example of a time waveform corresponding to a vibration pattern when a lightning strike occurs.
- FIG. 9 is an explanatory diagram showing an example of an image displayed by the lightning strike detection system according to the first embodiment.
- FIG. 10 is a block diagram showing the essential parts of another lightning detection device according to the first embodiment.
- FIG. 11 is a block diagram showing essential parts of another lightning detection system according to the first embodiment.
- FIG. 1 is an explanatory diagram showing an example of a state in which optical fiber cables are installed on a plurality of steel towers by an aerial method.
- FIG. 2 is a block diagram showing the essential parts of the lightning strike detection system according to the first embodiment. A lightning detection system according to the first embodiment will be described with reference to FIGS. 1 and 2.
- FIG. 1 is an explanatory diagram showing an example of a state in which optical fiber cables are installed on a plurality of steel towers by an aerial method.
- FIG. 2 is a block diagram showing the essential parts of the lightning strike detection system according to the first embodiment. A lightning detection system according to the first embodiment will be described with reference to FIGS. 1 and 2.
- FIG. 1 is an explanatory diagram showing an example of a state in which optical fiber cables are installed on a plurality of steel towers by an aerial method.
- FIG. 2 is a block diagram showing the essential parts of the lightning strike detection system according to the first embodiment. A lightning detection system according to the first embodiment will be described with reference to FIGS. 1
- an optical fiber cable 2 is laid by an aerial method via N steel towers 1_1 to 1_N.
- N is an integer of 2 or more.
- N 3.
- the towers 1_1 to 1_N are for transmission or distribution.
- the optical fiber cable 2 is, for example, a communication optical fiber cable provided inside an existing overhead ground wire. That is, the optical fiber cable 2 uses, for example, an existing OPGW.
- the main part of the optical fiber network 3 is configured by the optical fiber cable 2 .
- the optical fiber network 3 may include other optical fiber cables (not shown) in addition to the optical fiber cables 2 .
- the fiber optic network 3 may include one fiber optic cable 2 or may include multiple fiber optic cables.
- the other optical fiber cable uses an optical fiber cable similar to the optical fiber cable 2 . That is, the other optical fiber cable may be laid by a construction method via a plurality of steel towers (not shown). An example in which the optical fiber network 3 includes one optical fiber cable 2 will be mainly described below.
- the individual optical fiber cables included in the optical fiber network 3 can be used for optical fiber sensing.
- individual fiber optic cables included in the fiber optic network 3 can be used for vibration, sound or temperature detection by Distributed Fiber Optic Sensing (DFOS).
- DFOS Distributed Fiber Optic Sensing
- information detected by optical fiber sensing using the optical fiber network 3 may be collectively referred to as "sensing information”.
- the fiber optic network 3 detects sensing information.
- the lightning detection system 100 includes an optical fiber network 3, a lightning detection device 4 and an output device 5.
- the lightning strike detection device 4 includes an optical signal transmitter 11 , an optical signal receiver 12 , a lightning strike detector 13 and an output controller 14 .
- the optical signal transmitter/receiver 11 and the optical signal receiver 12 constitute a main part of the optical signal transmitter/receiver 15 .
- the optical signal transmitter 11 outputs a pulsed optical signal to the optical fiber cable 2 .
- the output optical signal is input to the optical fiber cable 2 and propagates inside the optical fiber cable 2 .
- backscattered light is generated inside the optical fiber cable 2 .
- the optical signal receiver 12 receives an optical signal corresponding to the generated backscattered light.
- the received optical signal contains sensing information for the DFOS.
- the optical signal transmitter/receiver 15 may include a device (not shown) for separating the optical signal output by the optical signal transmitter 11 and the optical signal received by the optical signal receiver 12. good.
- the optical signal transmitter/receiver 15 may include an optical circulator (not shown) provided between the optical signal transmitter 11 , the optical fiber cable 2 and the optical signal receiver 12 .
- the lightning strike detection unit 13 uses sensing information included in the optical signal received by the optical signal reception unit 12 to detect the occurrence of a lightning strike in the optical fiber network 3 . More specifically, the lightning detection unit 13 detects whether or not a lightning strike has occurred in the optical fiber network 3, and also detects the position of the lightning strike in the optical fiber network 3 (hereinafter sometimes referred to as "location of occurrence"). do. A specific example of the detection method by the lightning strike detection unit 13 will be described later with reference to FIGS. 7A, 7B, 8A and 8B.
- the output control unit 14 executes control to output information including the detection result of the lightning detection unit 13 (hereinafter sometimes referred to as "detection result information").
- An output device 5 is used to output the detection result information.
- the output device 5 includes, for example, at least one of a display device, an audio output device, and a communication device.
- the display device uses, for example, a display.
- the audio output device uses, for example, a speaker.
- a communication device for example, uses a dedicated transmitter and receiver.
- the output control unit 14 executes control to display the image I corresponding to the detection result information.
- a display device of the output device 5 is used for displaying the image I.
- the output control unit 14 executes control to output a sound corresponding to the detection result information.
- An audio output device among the output devices 5 is used for outputting such audio.
- the output control unit 14 executes control to transmit a signal corresponding to the detection result information to another system (not shown).
- a communication device of the output device 5 is used for transmission of such a signal.
- optical signal transmission unit 11 may be referred to as “optical signal transmission means”.
- optical signal receiving unit 12 may be referred to as “optical signal receiving means”.
- lightning detection unit 13 may be referred to as “lightning detection means”.
- output control unit 14 may be referred to as "output control means”.
- FIG. 3 the hardware configuration of the main part of the lightning detection device 4 will be described with reference to FIGS. 3 to 5.
- the lightning detection device 4 uses a computer 21.
- FIG. 1 is a diagrammatic representation of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG. 1 of FIG.
- the computer 21 comprises a transmitter 31, a receiver 32, a processor 33 and a memory 34.
- the memory 34 stores a program for causing the computer 21 to function as the optical signal transmitter 11, the optical signal receiver 12, the lightning detector 13, and the output controller 14 (a program for causing the transmitter 31 to function as the optical signal transmitter 11). and a program for causing the receiver 32 to function as the optical signal receiving section 12).
- the processor 33 reads and executes programs stored in the memory 34 . As a result, the function F1 of the optical signal transmitter 11, the function F2 of the optical signal receiver 12, the function F3 of the lightning detector 13, and the function F4 of the output controller 14 are realized.
- the computer 21 comprises a transmitter 31, a receiver 32 and a processing circuit 35, as shown in FIG.
- the processing circuit 35 performs processing for causing the computer 21 to function as the optical signal transmitter 11 , the optical signal receiver 12 , the lightning detector 13 and the output controller 14 (processing for causing the transmitter 31 to function as the optical signal transmitter 11 ). processing and processing for causing the receiver 32 to function as the optical signal receiving unit 12). Thereby, functions F1 to F4 are realized.
- the computer 21 comprises a transmitter 31, a receiver 32, a processor 33, a memory 34 and a processing circuit 35.
- some of the functions F1 to F4 are implemented by the processor 33 and the memory 34, and the rest of the functions F1 to F4 are implemented by the processing circuit 35.
- FIG. 5 shows that some of the functions F1 to F4 are implemented by the processor 33 and the memory 34, and the rest of the functions F1 to F4 are implemented by the processing circuit 35.
- the processor 33 is composed of one or more processors.
- the individual processors use, for example, CPUs (Central Processing Units), GPUs (Graphics Processing Units), microprocessors, microcontrollers, or DSPs (Digital Signal Processors).
- CPUs Central Processing Units
- GPUs Graphics Processing Units
- microprocessors microcontrollers
- DSPs Digital Signal Processors
- the memory 34 is composed of one or more memories. Individual memories include, for example, RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), hard disk drive, solid state drive, solid state memory Flexible discs, compact discs, DVDs (Digital Versatile Discs), Blu-ray discs, MO (Magneto Optical) discs, or mini discs are used.
- RAM Random Access Memory
- ROM Read Only Memory
- flash memory EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), hard disk drive, solid state drive, solid state memory Flexible discs, compact discs, DVDs (Digital Versatile Discs), Blu-ray discs, MO (Magneto Optical) discs, or mini discs are used.
- the processing circuit 35 is composed of one or more processing circuits. Individual processing circuits use, for example, ASIC (Application Specific Integrated Circuit), PLD (Programmable Logic Device), FPGA (Field Programmable Gate Array), SoC (System a Chip), or system LSI (Large Scale) is.
- ASIC Application Specific Integrated Circuit
- PLD Programmable Logic Device
- FPGA Field Programmable Gate Array
- SoC System a Chip
- system LSI Large Scale Scale
- the processor 33 may include a dedicated processor corresponding to each of the functions F1-F4.
- Memory 34 may include dedicated memory corresponding to each of functions F1-F4.
- the processing circuitry 35 may include dedicated processing circuitry corresponding to each of the functions F1-F4.
- the lightning detection unit 13 uses sensing information included in the optical signal received by the optical signal reception unit 12 to detect a lightning strike in the optical fiber network 3 (step ST1). More specifically, the lightning detector 13 detects whether or not a lightning strike has occurred in the optical fiber network 3 . Alternatively, the lightning strike detector 13 detects whether or not a lightning strike has occurred in the optical fiber network 3 and also detects the location of the lightning strike in the optical fiber network 3 .
- the output control unit 14 executes control to output information including the detection result in step ST1 (ie, detection result information) (step ST2).
- the image I corresponding to the detection result information is displayed, the sound corresponding to the detection result information is output, or the signal corresponding to the detection result information is transmitted.
- the fiber optic network 3 can be used for vibration detection by DFOS. More specifically, the vibration intensity for each frequency component at an arbitrary point on the optical fiber cable 2 is detected in time series.
- the sensing information includes data (hereinafter sometimes referred to as "vibration data") indicating such a vibration pattern (hereinafter sometimes referred to as "vibration pattern"). That is, the vibration pattern is a pattern that indicates at least one of the variation of vibration intensity with respect to time and the distribution of vibration intensity with respect to frequency.
- the sensing information includes vibration data indicating the vibration pattern of the lightning strike. That is, at an arbitrary point of the optical fiber cable 2, the vibration pattern when a lightning strike occurs differs from the vibration pattern when no lightning strike occurs.
- FIG. 7A shows an example of the frequency spectrum FS_1 corresponding to the vibration pattern at a specific point of the optical fiber cable 2 when no lightning strike occurs.
- P_1 in FIG. 7A indicates a peak portion in the frequency spectrum FS_1.
- FIG. 7B shows an example of the frequency spectrum FS_2 corresponding to the vibration pattern at such a specific point when there is a lightning strike.
- P_2 in FIG. 7B indicates a peak portion in the frequency spectrum FS_2.
- the shape of the frequency spectrum FS_2 when a lightning strike normally occurs differs from the shape of the frequency spectrum FS_1 when no lightning strike occurs. More specifically, the peak frequency in the frequency spectrum FS_2 when a lightning strike occurs is different from the peak frequency in the frequency spectrum FS_1 when no lightning strike occurs. Also, the peak value in the frequency spectrum FS_2 when a lightning strike occurs differs from the peak value in the frequency spectrum FS_1 when no lightning strike occurs.
- FIG. 8A shows an example of a time waveform TW_1 corresponding to a vibration pattern at a specific point of the optical fiber cable 2 when no lightning strike occurs.
- T_1 in FIG. 8A indicates the damping time when instantaneous vibration occurs due to a factor other than lightning strikes (for example, wind).
- FIG. 8B shows an example of a time waveform TW_2 corresponding to a vibration pattern at such a specific point when a lightning strike occurs.
- T_2 in FIG. 8B indicates the attenuation time when instantaneous vibration occurs due to a lightning strike.
- the shape of the time waveform TW_2 when a lightning strike normally occurs differs from the shape of the time waveform TW_1 when no lightning strike occurs. More specifically, the attenuation time T_2 in the time waveform TW_2 when a lightning strike occurs is different from the attenuation time T_1 in the time waveform TW_1 when no lightning strike occurs.
- the vibration pattern when lightning strike does not occur and the vibration pattern when lightning strike occurs at an arbitrary point on the optical fiber cable 2 are identified.
- a model is prepared in advance. Such models are generated using, for example, machine learning.
- the lightning strike detector 13 inputs the vibration data included in the sensing information corresponding to each point of the optical fiber cable 2 to the model.
- such a model outputs information indicating whether the vibration pattern indicated by the input vibration data is the vibration pattern when a lightning strike occurs or the vibration pattern when a lightning strike does not occur. do.
- data indicating a vibration pattern (hereinafter referred to as "reference pattern") equivalent to the vibration pattern when a lightning strike occurs is prepared in advance for an arbitrary point on the optical fiber cable 2 .
- reference pattern data indicating a vibration pattern
- Such data is generated, for example, by generating an artificial vibration that simulates a lightning strike.
- the lightning detector 13 compares the vibration pattern indicated by the vibration data included in the sensing information corresponding to each point of the optical fiber cable 2 with the reference pattern indicated by the data. That is, the lightning detector 13 performs so-called "pattern matching". As a result, it is detected whether or not a lightning strike has occurred at each point of the optical fiber cable 2 . In other words, the presence or absence of a lightning strike on the optical fiber cable 2 is detected, and the location of the lightning strike on the optical fiber cable 2 is also detected.
- an image I indicating that a lightning strike has occurred may be displayed.
- the image I may indicate the location of the lightning strike.
- FIG. 9 shows an example of such an image I.
- the image I includes a map image I_1 of the area where the optical fiber cable 2 is laid.
- the map image I_1 may be enlarged or reduced by inputting an operation using an operation input device (for example, a mouse or a touch panel) (not shown).
- a linear image I_2 corresponding to the optical fiber cable 2 is superimposed on the map image I_1.
- the color of the portion i corresponding to the position where the lightning strike occurred in the image I_2 is different from the color of the other portions in the image I_2.
- a user of the lightning strike detection system 100 can easily visually know the position where the lightning strike occurred by viewing the image I.
- the occurrence of a lightning strike in the optical fiber network 3 can be detected by using the lightning strike detection system 100 . More specifically, it is possible to detect whether or not such a lightning strike has occurred, and to detect the position where such a lightning strike has occurred. A so-called “remote” detection can then be realized. In other words, it is possible to eliminate the need for a worker to patrol or the like in detecting the location of the occurrence of the lightning strike.
- the occurrence of a lightning strike as described above can be detected by a DFOS using the existing optical fiber cable 2 (for example, an existing OPGW). Therefore, in detecting the occurrence of such a lightning strike, a dedicated device installed on each steel tower 1 is not required. Therefore, it is possible to detect the occurrence of a lightning strike with a simple system configuration as compared with the case of using these devices (for example, the accident detection device and the shock application device in the technology described in Patent Document 1).
- backscattered light for the optical signal input to the optical fiber cable 2 is used to detect the occurrence of a lightning strike based on the vibration pattern (that is, to detect the occurrence of a lightning strike using the DFOS). Therefore, the occurrence of such a lightning strike can be detected using a device provided at one end of the optical fiber cable 2 (that is, the lightning strike detection device 4). In other words, it is possible to eliminate the need for a dedicated device installed at the other end of the optical fiber cable 2 in detecting the occurrence of such a lightning strike. As a result, it is possible to detect the occurrence of a lightning strike with a simpler system configuration than when using devices installed at both ends of the OPGW (for example, the primary and secondary locating devices in the technology described in Patent Document 1). can be done.
- the optical fiber network 3 may include multiple optical fiber cables.
- a plurality of optical signal transmitting/receiving units 15 corresponding to a plurality of optical fiber cables may be provided. That is, each optical signal transmitter/receiver 15 is provided at one end of the corresponding optical fiber cable.
- the lightning detector 13 detects the occurrence of a lightning strike in each optical fiber cable using sensing information included in the optical signal received by the optical signal receiver 12 of each optical signal transmitter/receiver 15. Also good.
- optical fiber network 3 The structures that support individual optical fiber cables included in the optical fiber network 3 are not limited to multiple steel towers.
- the optical fiber network 3 may include optical fiber cables laid by an overhead method via a plurality of utility poles (not shown).
- the optical signal receiving section 12 and the lightning detection section 13 may constitute the main part of the lightning detection device 4 .
- the optical signal transmitter 11 and the output controller 14 may be provided outside the lightning detector 4 .
- the optical signal transmitter 11 may be provided in an optical communication device (not shown) using the optical fiber cable 2 .
- the main part of the lightning detection system 100 may be configured by the optical signal receiving section 12 and the lightning detection section 13 .
- the optical fiber cable 2 may be provided outside the lightning detection system 100 .
- the optical signal transmitter 11 and the output controller 14 may be provided outside the lightning detection system 100 .
- the output device 5 may be provided outside the lightning detection system 100 .
- the optical signal transmitter 11 may be provided in an optical communication device (not shown) using the optical fiber cable 2 .
- the optical signal receiver 12 receives an optical signal including sensing information from the optical fiber network 3 that detects sensing information.
- the lightning detector 13 detects the occurrence of a lightning strike in the optical fiber network 3 using sensing information included in the optical signal.
- the sensing information indicates at least the lightning strike vibration pattern.
- the lightning detector 13 detects the occurrence of a lightning strike based on the vibration pattern. Thereby, occurrence of a lightning strike in the optical fiber network 3 can be detected.
- the occurrence of such a lightning strike can be detected with a simple system configuration that does not require a dedicated device installed on each steel tower or the like.
- the lightning detection system 100 may include at least one of the optical signal transmitter 11 and the output controller 14 in addition to the optical signal receiver 12 and the lightning detector 13 (not shown). Each part of the lightning strike detection system 100 may be configured by an independent device. These devices may be geographically or network-distributed. For example, these devices may include edge computers and cloud computers.
- [Appendix] [Appendix 1] optical signal receiving means for receiving an optical signal containing the sensing information from an optical fiber network for detecting the sensing information; lightning detection means for detecting the occurrence of a lightning strike in the optical fiber network using the sensing information contained in the optical signal; The sensing information indicates at least the vibration pattern of the lightning strike, The lightning detection device, wherein the lightning detection means detects the occurrence of the lightning strike based on the vibration pattern.
- Appendix 2 2. The lightning detection device according to claim 1, wherein the lightning detection means detects whether or not the lightning strike has occurred, and also detects the location of the lightning strike in the optical fiber network.
- the lightning detection device according to appendix 1 or appendix 2, wherein the lightning detection means detects the occurrence of the lightning strike by comparing the vibration pattern with a predetermined reference pattern.
- Appendix 4 3. The lightning detection device according to any one of appendices 1 to 3, wherein information including a result of detection by the lightning detection means is output.
- optical signal receiving means for receiving an optical signal containing the sensing information from an optical fiber network for detecting the sensing information; lightning detection means for detecting the occurrence of a lightning strike in the optical fiber network using the sensing information contained in the optical signal; The sensing information indicates at least the vibration pattern of the lightning strike,
- the lightning strike detection system wherein the lightning strike detection means detects the occurrence of the lightning strike based on the vibration pattern.
- [Appendix 6] 6. The lightning detection system according to appendix 5, wherein the lightning detection means detects whether or not the lightning strike has occurred, and also detects the location of the lightning strike in the optical fiber network.
- [Appendix 7] The lightning detection system according to appendix 5 or appendix 6, wherein the lightning detection means detects the occurrence of the lightning strike by comparing the vibration pattern with a predetermined reference pattern.
- [Appendix 8] 8. The lightning detection system according to any one of appendices 5 to 7, wherein information including a result of detection by the lightning detection means is output.
- An optical signal receiving means receives an optical signal containing the sensing information from an optical fiber network that detects the sensing information; lightning detection means for detecting the occurrence of a lightning strike in the optical fiber network using the sensing information contained in the optical signal; The sensing information indicates at least the vibration pattern of the lightning strike, A lightning strike detection method, wherein the lightning strike detection means detects the occurrence of the lightning strike based on the vibration pattern.
- a lightning strike detection method wherein the lightning strike detection means detects the occurrence of the lightning strike based on the vibration pattern.
- the lightning detection means detects whether or not the lightning strike has occurred, and also detects the location of the lightning strike in the optical fiber network.
- Appendix 12 12.
- Appendix 16 16.
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Abstract
Description
図1は、複数本の鉄塔に架空方式により光ファイバケーブルが架設された状態の例を示す説明図である。図2は、第1実施形態に係る雷撃検出システムの要部を示すブロック図である。図1及び図2を参照して、第1実施形態に係る雷撃検出システムについて説明する。
[付記1]
センシング情報を検出する光ファイバネットワークから前記センシング情報を含む光信号を受信する光信号受信手段と、
前記光信号に含まれる前記センシング情報を用いて、前記光ファイバネットワークにおける雷撃の発生を検出する雷撃検出手段と、を備え、
前記センシング情報は、少なくとも前記雷撃の振動パターンを示し、
前記雷撃検出手段は、前記振動パターンに基づき前記雷撃の発生を検出する
ことを特徴とする雷撃検出装置。
[付記2]
前記雷撃検出手段は、前記雷撃の発生の有無を検出するとともに、前記光ファイバネットワークにおける前記雷撃の発生箇所を検出することを特徴とする付記1に記載の雷撃検出装置。
[付記3]
前記雷撃検出手段は、前記振動パターンを所定の基準パターンと比較することにより前記雷撃の発生を検出することを特徴とする付記1又は付記2に記載の雷撃検出装置。
[付記4]
前記雷撃検出手段による検出の結果を含む情報が出力されることを特徴とする付記1から付記3のうちのいずれか一つに記載の雷撃検出装置。
[付記5]
センシング情報を検出する光ファイバネットワークから前記センシング情報を含む光信号を受信する光信号受信手段と、
前記光信号に含まれる前記センシング情報を用いて、前記光ファイバネットワークにおける雷撃の発生を検出する雷撃検出手段と、を備え、
前記センシング情報は、少なくとも前記雷撃の振動パターンを示し、
前記雷撃検出手段は、前記振動パターンに基づき前記雷撃の発生を検出する
ことを特徴とする雷撃検出システム。
[付記6]
前記雷撃検出手段は、前記雷撃の発生の有無を検出するとともに、前記光ファイバネットワークにおける前記雷撃の発生箇所を検出することを特徴とする付記5に記載の雷撃検出システム。
[付記7]
前記雷撃検出手段は、前記振動パターンを所定の基準パターンと比較することにより前記雷撃の発生を検出することを特徴とする付記5又は付記6に記載の雷撃検出システム。
[付記8]
前記雷撃検出手段による検出の結果を含む情報が出力されることを特徴とする付記5から付記7のうちのいずれか一つに記載の雷撃検出システム。
[付記9]
光信号受信手段が、センシング情報を検出する光ファイバネットワークから前記センシング情報を含む光信号を受信し、
雷撃検出手段が、前記光信号に含まれる前記センシング情報を用いて、前記光ファイバネットワークにおける雷撃の発生を検出し、
前記センシング情報は、少なくとも前記雷撃の振動パターンを示し、
前記雷撃検出手段は、前記振動パターンに基づき前記雷撃の発生を検出する
ことを特徴とする雷撃検出方法。
[付記10]
前記雷撃検出手段は、前記雷撃の発生の有無を検出するとともに、前記光ファイバネットワークにおける前記雷撃の発生箇所を検出することを特徴とする付記9に記載の雷撃検出方法。
[付記11]
前記雷撃検出手段は、前記振動パターンを所定の基準パターンと比較することにより前記雷撃の発生を検出することを特徴とする付記9又は付記10に記載の雷撃検出方法。
[付記12]
前記雷撃検出手段による検出の結果を含む情報が出力されることを特徴とする付記9から付記11のうちのいずれか一つに記載の雷撃検出方法。
[付記13]
コンピュータを、
センシング情報を検出する光ファイバネットワークから前記センシング情報を含む光信号を受信する光信号受信手段と、
前記光信号に含まれる前記センシング情報を用いて、前記光ファイバネットワークにおける雷撃の発生を検出する雷撃検出手段と、
として機能させるためのプログラムが記録された記録媒体であって、
前記センシング情報は、少なくとも前記雷撃の振動パターンを示し、
前記雷撃検出手段は、前記振動パターンに基づき前記雷撃の発生を検出する
ことを特徴とする記録媒体。
[付記14]
前記雷撃検出手段は、前記雷撃の発生の有無を検出するとともに、前記光ファイバネットワークにおける前記雷撃の発生箇所を検出することを特徴とする付記13に記載の記録媒体。
[付記15]
前記雷撃検出手段は、前記振動パターンを所定の基準パターンと比較することにより前記雷撃の発生を検出することを特徴とする付記13又は付記14に記載の記録媒体。
[付記16]
前記プログラムは、前記コンピュータを、前記雷撃検出手段による検出の結果を含む情報を出力する制御を実行する出力制御手段として機能させることを特徴とする付記13から付記15のうちのいずれか一つに記載の記録媒体。
2 光ファイバケーブル
3 光ファイバネットワーク
4 雷撃検出装置
5 出力装置
11 光信号送信部
12 光信号受信部
13 雷撃検出部
14 出力制御部
15 光信号送受信部
21 コンピュータ
31 送信機
32 受信機
33 プロセッサ
34 メモリ
35 処理回路
100 雷撃検出システム
Claims (12)
- センシング情報を検出する光ファイバネットワークから前記センシング情報を含む光信号を受信する光信号受信手段と、
前記光信号に含まれる前記センシング情報を用いて、前記光ファイバネットワークにおける雷撃の発生を検出する雷撃検出手段と、を備え、
前記センシング情報は、少なくとも前記雷撃の振動パターンを示し、
前記雷撃検出手段は、前記振動パターンに基づき前記雷撃の発生を検出する
ことを特徴とする雷撃検出装置。 - 前記雷撃検出手段は、前記雷撃の発生の有無を検出するとともに、前記光ファイバネットワークにおける前記雷撃の発生箇所を検出することを特徴とする請求項1に記載の雷撃検出装置。
- 前記雷撃検出手段は、前記振動パターンを所定の基準パターンと比較することにより前記雷撃の発生を検出することを特徴とする請求項1又は請求項2に記載の雷撃検出装置。
- 前記雷撃検出手段による検出の結果を含む情報が出力されることを特徴とする請求項1から請求項3のうちのいずれか1項に記載の雷撃検出装置。
- センシング情報を検出する光ファイバネットワークから前記センシング情報を含む光信号を受信する光信号受信手段と、
前記光信号に含まれる前記センシング情報を用いて、前記光ファイバネットワークにおける雷撃の発生を検出する雷撃検出手段と、を備え、
前記センシング情報は、少なくとも前記雷撃の振動パターンを示し、
前記雷撃検出手段は、前記振動パターンに基づき前記雷撃の発生を検出する
ことを特徴とする雷撃検出システム。 - 前記雷撃検出手段は、前記雷撃の発生の有無を検出するとともに、前記光ファイバネットワークにおける前記雷撃の発生箇所を検出することを特徴とする請求項5に記載の雷撃検出システム。
- 前記雷撃検出手段は、前記振動パターンを所定の基準パターンと比較することにより前記雷撃の発生を検出することを特徴とする請求項5又は請求項6に記載の雷撃検出システム。
- 前記雷撃検出手段による検出の結果を含む情報が出力されることを特徴とする請求項5から請求項7のうちのいずれか1項に記載の雷撃検出システム。
- 光信号受信手段が、センシング情報を検出する光ファイバネットワークから前記センシング情報を含む光信号を受信し、
雷撃検出手段が、前記光信号に含まれる前記センシング情報を用いて、前記光ファイバネットワークにおける雷撃の発生を検出し、
前記センシング情報は、少なくとも前記雷撃の振動パターンを示し、
前記雷撃検出手段は、前記振動パターンに基づき前記雷撃の発生を検出する
ことを特徴とする雷撃検出方法。 - 前記雷撃検出手段は、前記雷撃の発生の有無を検出するとともに、前記光ファイバネットワークにおける前記雷撃の発生箇所を検出することを特徴とする請求項9に記載の雷撃検出方法。
- 前記雷撃検出手段は、前記振動パターンを所定の基準パターンと比較することにより前記雷撃の発生を検出することを特徴とする請求項9又は請求項10に記載の雷撃検出方法。
- 前記雷撃検出手段による検出の結果を含む情報が出力されることを特徴とする請求項9から請求項11のうちのいずれか1項に記載の雷撃検出方法。
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JPH0266468A (ja) * | 1988-08-31 | 1990-03-06 | Chubu Electric Power Co Inc | 送電線路網の異常現象検出方法および装置 |
JPH10177055A (ja) * | 1996-12-17 | 1998-06-30 | Chubu Electric Power Co Inc | 架空送電線の事故検出位置標定システム |
WO2020202654A1 (ja) * | 2019-03-29 | 2020-10-08 | 日本電気株式会社 | 監視システム、監視装置、監視方法、及び非一時的なコンピュータ可読媒体 |
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JPH0266468A (ja) * | 1988-08-31 | 1990-03-06 | Chubu Electric Power Co Inc | 送電線路網の異常現象検出方法および装置 |
JPH10177055A (ja) * | 1996-12-17 | 1998-06-30 | Chubu Electric Power Co Inc | 架空送電線の事故検出位置標定システム |
WO2020202654A1 (ja) * | 2019-03-29 | 2020-10-08 | 日本電気株式会社 | 監視システム、監視装置、監視方法、及び非一時的なコンピュータ可読媒体 |
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