JP2014130750A - Lightning rod system - Google Patents

Abstract

The prior art does not have a configuration for controlling the timing of discharge from a discharge electrode to a lightning rod. For this reason, for example, it is not possible to discharge in a timely manner, such as a discharge that matches the beginning of a lightning strike, increasing the electron density in the space around the tip of the lightning rod at a timing unrelated to the lightning strike, and as a result, forming a conductor. There is a problem that unnecessary lightning strikes may occur.
In order to solve the above problems, the present invention detects a lightning strike sign or start using an electric field sensor device, and drives a power supply for a discharge electrode provided in a lightning rod device at the detection timing. A lightning rod system configured to be provided is provided.
[Selection] Figure 2

Description

  The present invention relates to a technique for suitably reducing damage caused by a lightning strike using a lightning rod.

  Conventionally, a lightning rod has been used to reduce damage caused by lightning. This lightning rod functions to reduce the frequency of lightning strikes by neutralizing the potential difference between the vicinity of the ground and the thundercloud and to reduce the frequency of lightning strikes. It has a function to form a lead wire with the thundercloud and guide the lightning to itself (the lightning rod itself is the end point or starting point of the lightning generated between the thundercloud), and thereby the area around the lightning rod (protection range) It is said that it is reducing the damage of lightning strikes.

  In addition, in order to improve the function of guiding the lightning strike to itself in the lightning rod, for example, Patent Document 1 discloses that a high voltage is generated in the coil using a precursor discharge before the lightning strike, thereby causing the lightning rod from the discharge electrode to the lightning rod. Disclosed is a technology related to an active lightning rod that discharges light and promotes electron emission from the lightning rod tip to increase the electron density in the space around the tip of the lightning rod and ionize it to efficiently induce lightning strikes. Has been.

  Patent Document 2 discloses that a lightning rod is discharged using a high-voltage applied power source to increase the electron density in the space around the tip of the lightning rod as in Patent Document 1 to efficiently induce lightning. The technique regarding the dielectric lightning method characterized by this is disclosed.

JP 2005-123137 A JP 2007-149622 A

  However, the above conventional techniques have the following problems. That is, neither of the techniques of Patent Documents 1 and 2 has a configuration for controlling the timing of discharge from the discharge electrode to the lightning rod. For this reason, for example, it is not possible to discharge in a timely manner, such as a discharge that matches the beginning of a lightning strike, increasing the electron density in the space around the tip of the lightning rod at a timing unrelated to the lightning strike, and as a result, forming a conductor. There is a problem that it is impossible to perform lightning strikes at a necessary timing, and the effect as a lightning rod cannot be sufficiently exhibited, that is, an unnecessary lightning strike is caused on an object to be protected against lightning.

  In order to solve the above problems, the present invention is configured to detect a lightning strike sign or start using an electric field sensor device, and to drive a power supply for a discharge electrode provided in the lightning rod device at the detection timing. Provide a lightning rod system.

  Specifically, a lightning rod system comprising an electric field sensor device and a lightning rod device, wherein the electric field sensor device is detected with an electric field strength detection unit that detects a change in electric field strength in the vicinity of the installation location of the lightning rod device. A determination unit that determines whether or not the change in electric field strength indicates a predetermined pattern, and a discharge command transmission unit that transmits a discharge command to the lightning rod device when the change in electric field strength indicates a predetermined pattern The lightning rod device receives the discharge command from the lightning rod, the discharge electrode that discharges to the lightning rod, the power source for the discharge, and the discharge command transmitter, and performs the discharge. There is provided a lightning rod system having a power source driving unit for driving a power source.

  Further, the lightning rod system having the above-described configuration, further comprising a plurality of lightning rods arranged so as to surround the discharge electrode, the lightning rod system in which the discharge electrode is substantially spherical, or from the discharge command transmission unit There is also provided a lightning rod system further comprising a fiber connection portion made of an optical fiber for transmitting a discharge command to the power supply drive portion.

  In addition, the electric field strength detection unit having the above-described configuration further includes a gradual increase detection unit that detects a gradual increase in electric field strength and a rapid decrease detection unit that detects a rapid decrease in electric field strength, and the determination A lightning rod having a lightning rod having a gradual increase in electric field intensity and an increase / decrease determination means that determines that the predetermined pattern is exhibited when both the gradual increase detection means and the rapid decrease detection means detect a rapid decrease in electric field intensity. A system is also provided.

  The present invention also provides a lightning rod system having the above-described configuration and further having a tip of the lightning rod made of a copper tungsten alloy member.

  According to the present invention having the above-described configuration, it is possible to increase the electron density in the space around the tip of the lightning rod by driving the power supply for the discharge electrode at the timing such as the lightning sign detected or the start of lightning detected by the electric field sensor device. Therefore, it is possible to perform lightning strikes without causing unnecessary lightning strikes on the object to be protected against lightning.

The figure for demonstrating an example of the lightning strike guidance by the lightning rod system of Example 1. The figure showing an example of the functional block in the lightning rod system of Example 1. The figure for demonstrating an example of the predetermined pattern judgment process of the change of the electric field strength in the lightning rod system of Example 1. The side view showing an example of the lightning rod in the lightning rod system of Example 1. The side view showing an example of the discharge electrode in the lightning rod system of Example 1. The figure showing an example of the hardware constitutions in the electric field sensor apparatus of the lightning rod system of Example 1. The figure showing an example of the hardware constitutions in the lightning rod apparatus of the lightning rod system of Example 1. FIG. The flowchart showing an example of the flow of a process in the lightning rod system of Example 1. The figure showing an example of the functional block in the lightning rod system of Example 2. The figure showing an example of the functional block in the lightning rod system of Example 3. The figure showing an example which implement | achieved the gradual increase detection means, the sudden decrease detection means, and the increase / decrease determination means in the lightning rod system of Example 3 with the electronic circuit. The figure showing an example which implement | achieved the gradual increase detection means, the sudden decrease detection means, and the increase / decrease determination means in the lightning rod system of Example 3 with the electronic circuit. The flowchart showing an example of the flow of a process in the lightning rod system of Example 3.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to these embodiments, and can be implemented in various modes without departing from the spirit of the present invention.

  In the first embodiment, claims 1, 2, 3, and 6 will be mainly described. In the second embodiment, claim 4 will be mainly described. In the third embodiment, claim 5 will be mainly described.

Example 1
<Overview>
FIG. 1 is a diagram for explaining an example of lightning strike by the lightning rod system of the present embodiment. As shown in FIG. 1A, the lightning rod system of the present embodiment includes a lightning rod device including a lightning rod, a discharge electrode, a power source, and the like, and an electric field sensor device for detecting the timing of a lightning strike. .

  As shown in FIG. 1 (b), a thundercloud approaches the electric field sensor device, the potential difference between the space and the thundercloud spreads, dielectric breakdown of the space occurs, and lightning strikes are likely to occur, or that an electric field is about to occur. When the electric field sensor device detects the intensity variation pattern, the electric field sensor device outputs a power supply discharge command to the lightning rod device.

  Then, the power supply of the lightning rod device is driven according to the discharge command, and a voltage is applied to the discharge electrode. A discharge to the lightning rod is generated from the discharge electrode in response to the voltage application, whereby electrons are emitted from the tip of the lightning rod. Then, the electron density around the lightning rod increases, and lightning is induced by ionizing the space.

  As described above, in the lightning rod system of the present embodiment, lightning can be induced by discharging the lightning rod by applying a voltage from the power source at the timing of lightning sign and beginning detected by the electric field sensor device. That is, it is possible to guide only the lightning that really falls without unnecessarily inducing lightning, and thus, it is possible to provide a lightning rod system that can prevent lightning strikes on the object to be protected.

<Functional configuration>
FIG. 2 is a diagram illustrating an example of functional blocks in the lightning rod system of the present embodiment. Note that each functional block of the electric field sensor device and the power source drive unit of the lightning rod device constituting the lightning rod system described below can be realized as a combination of hardware and software. Specifically, if a computer is used, a CPU, a main memory, a bus, or a secondary storage device (such as a hard disk or a non-volatile memory), an input device used for information input, other external peripheral devices, etc. And a hardware interface of the external peripheral device, a communication interface, a driver program for controlling the hardware, other application programs, and a user interface application program.

  Then, by CPU processing according to the program developed on the main memory, the data input from the input device or other interface and held in the memory or hard disk is processed and stored, A command for controlling the software is generated. Alternatively, each functional block of the electric field sensor device and the power source drive unit of the lightning rod device may be realized including dedicated hardware, an electronic circuit that does not use a CPU, and the like.

  In addition, each embodiment described in the present specification can be realized not only as a system or an apparatus but also as a method. Moreover, a part of such an apparatus can be configured as software. Furthermore, a software product used to cause a computer to execute such software and a recording medium on which the product is fixed are naturally included in the technical scope of each embodiment described in this specification (this specification The same throughout.)

  As shown in FIG. 2, the lightning rod system of this embodiment includes an “electric field sensor device” (0200) and a “lightning rod device” (0210). The distance and position relationship between the electric field sensor device and the lightning rod device is not particularly limited, but when the thundercloud lightning timing is detected by the electric field sensor device, if the thundercloud and the lightning rod are too far apart, In light of the fact that lightning is not well guided, it is basically desirable that the electric field sensor device (the electric field intensity detector) be provided within the protection range of the lightning rod of the lightning rod device.

(Electric field sensor device)
As shown in FIG. 2, the “electric field sensor device” (0200) includes an “electric field intensity detection unit” (0201), a “determination unit” (0202), and a “discharge command transmission unit” (0203). .

  The “electric field strength detection unit” (0201) has a function of detecting a change in electric field strength in the vicinity of the installation location of the lightning rod device, and can be realized by various sensors such as an electric field sensor and a voltage sensor. Specifically, if it is an electric field sensor, it is good to detect the change using the detection result of the electric field intensity output directly. In the case of a voltage sensor, the electric field strength, for example, a charging voltage to an electrode disposed on the antenna is detected, and a potential that is a difference between the charging voltage and a voltage input from a ground power source or a reference power source is detected as the electric field strength. The change is detected.

  The “near the place where the lightning rod device is installed”, which is a target for detecting the electric field strength, includes an area within the protection range of the lightning rod of the lightning rod device as described above.

  The “determination unit” (0202) has a function of determining whether or not the detected change in the electric field strength indicates a predetermined pattern. The calculation unit includes a CPU and a main memory and a determination program, or a calculation device or program. It can be realized by an electronic circuit that is not used.

  The “predetermined pattern of the change in electric field strength” is not particularly limited as long as it is a change pattern of the electric field strength that is assumed to indicate the sign or beginning of a lightning strike. An example of determining that the pattern is a predetermined pattern is given. That is, as shown in FIG. 3A, for example, the electric field strength detected by the electric field strength detector gradually increases with time, and as a result of the increase, the electric field strength is a predetermined threshold such as 10 kV / m. When α exceeds, it is determined that the change in the electric field intensity indicates a predetermined pattern, or as shown in FIG. 3B, the difference between the electric field intensity detected last time and the electric field intensity detected this time is negative. And when the absolute value takes a difference value equal to or greater than the predetermined threshold value β, it is determined that the predetermined pattern is indicated. Alternatively, as will be described in detail later, there is an example in which a predetermined pattern is determined when the change in electric field intensity is a gradually increasing change pattern and a rapidly decreasing change pattern.

  In addition, when detecting a lightning strike sign or beginning by a change pattern of electric field strength, the time from the occurrence of the change of electric field strength to the completion of the lightning strike may be as short as 10 to 20 microseconds, for example. Many. Therefore, in the judgment calculation processing by the CPU and the judgment program, even if a lightning strike sign or start is detected, there is a possibility that the transmission of a discharge command, which will be described later, will not be in time for the lightning strike.

  Therefore, the determination unit may be configured as an electronic circuit that does not include a CPU. In other words, for example, by using a resistor, an operational amplifier, a logic gate, etc., the electronic circuit is configured so as to output a signal only when a change in electric field strength that is sequentially input is a predetermined pattern. The configuration is such that it is determined that “the change in electric field strength is a predetermined pattern” based on the output of the signal.

  The “discharge command transmission unit” (0203) has a function of transmitting a discharge command to the lightning rod device when it is determined that the change in the electric field strength indicates a predetermined pattern, such as a CPU or a main memory. It can be realized by an arithmetic device, a communication circuit, a discharge command transmission program, or an electronic circuit that does not use the arithmetic device or program.

  The discharge command transmission method in the discharge command transmission unit is not particularly limited, such as wireless / wired or communication protocol, but it is considered that transmission is performed in a state where a thundercloud approaches and the electric field in the space is unstable. In this case, it is preferable to use a transmission protocol that is not wireless, and that is less susceptible to noise from lightning strikes and discharges.

  As described above, by detecting the electric field intensity of the electric field sensor device, it is possible to detect a lightning strike sign or start, and to transmit a discharge command to the lightning rod device at the detection timing.

  In the lightning rod system of the present embodiment, instead of or in addition to the electric field sensor device, a magnetic field sensor device is used to detect a lightning strike sign and start, and to send a discharge command to the lightning rod device. good.

  For this purpose, the “magnetic field sensor device” includes a “magnetic field detection unit” that detects a change in the magnetic field in the vicinity of the installation location of the lightning rod device, and a “determination unit” that determines whether the detected change in the magnetic field indicates a predetermined pattern. And a “discharge command transmitter” that transmits a discharge command to the lightning rod device when the change in the magnetic field indicates a predetermined pattern.

  Specifically, the magnetic field detection unit detects the strength of the magnetic field and the magnetic flux density using a magnetic sensor, etc., and the change in the detected value exceeds the threshold due to an increase change like the determination unit in the electric field sensor device, For example, when a change from an increasing change to a sudden negative change is made, a predetermined pattern is determined and a discharge command is output.

  When both the magnetic field sensor device and the electric field sensor device are used in the lightning rod system of the present embodiment, for example, discharge is performed by receiving discharge commands from both sensor devices with the discharge execution condition of the lightning rod device described later as an AND condition. It is good also as a structure which performs this, and it is good also as a structure which discharges by reception of the discharge command from any one apparatus of both sensor apparatuses as OR conditions.

(Lightning rod device)
As shown in FIG. 2, the “lightning rod device” (0210) includes a “lightning rod” (0211), a “discharge electrode” (0212), a “power supply” (0213), and a “power supply drive unit” (0214). Have.

  The “lightning rod” (0211) is a structure configured to receive a discharge from the discharge electrode and induce a lightning strike to itself. For example, as a normal lightning rod, a rod-shaped structure having a pointed tip is provided to itself. It is good to have a shape that enhances the lightning strike induction effect. The material of the lightning rod is not particularly limited as long as it is a metal such as a metal having electrical conductivity. However, in view of its function, the lightning rod is exposed to wind and rain, and stainless steel, titanium, or rust-proof copper is applied. It is preferable that it is metal materials, such as.

  Moreover, you may comprise the front-end | tip of this lightning rod with a copper tungsten alloy member. Thus, by using a copper-tungsten alloy with a high melting point at the tip of the lightning rod, melting or deformation of the lightning rod due to arc discharge during a lightning strike can be suppressed.

  FIG. 4 is a side view and a top view showing an example of the lightning rod. As shown in this figure, a plurality of lightning rods (0411A to D) may be disposed so as to surround a discharge electrode (0412) described later. By surrounding the discharge electrode with a plurality of lightning rods in this way, the discharge electrode is not exposed to the outside, so that it is possible to prevent the discharge electrode from being directly damaged by lightning strikes during lightning strikes.

  Compared to a structure in which the discharge electrode is covered with a sealed structure such as a box for protection from lightning strikes, the structure that surrounds the discharge electrode with multiple lightning rods in this way efficiently uses the discharge from the discharge electrode. This has the effect of increasing the electron density in the surrounding space.

  Also, as shown in FIG. 4, the length of one to several main lightning rods (0411A) among the plurality of lightning rods may be longer than the other several lightning rods (0411B to D). By adopting such a structure, the main lightning rod can be used as the target for directing lightning strikes, and a large amount of current transition due to lightning strikes received by the main lightning rod can be guided to the auxiliary lightning rod. Damage due to the transition current to the discharge electrode (0412) can be suppressed.

  The “discharge electrode” (0312) has a function of discharging to a lightning rod, and the material and shape of the “discharge electrode” (0312) are not particularly limited as long as they have discharge characteristics. However, the shape is as shown in FIGS. It is desirable that the shape is substantially spherical. Thus, by making the shape of the discharge electrode substantially spherical, as shown in FIG. 5, the potential of the surface of the discharge electrode (0512) can be made uniform according to the voltage application from the power source described later, This makes it easier to discharge to the main lightning rod (0511A) or the like.

  Further, the discharge electrode may be structured to be placed on the “insulating member” (0520). By comprising in this way, the electric current transition to the discharge electrode which arises at the time of a lightning strike to a lightning rod can be suppressed.

  “Power supply” (0313) is a power supply for discharging, and refers to a structure having a function of applying a voltage to the discharge electrode. And this power supply is connected by the discharge electrode and the electric wire, and if the gap between the lightning rod and the discharge electrode is 0.5 cm through the electric wire, for example, a voltage such as 15000 V is applied to realize the discharge from the discharge electrode. be able to. The applied voltage may be appropriately adjusted according to the discharge property of the material of the discharge electrode, the gap length between the discharge electrode and the lightning rod, and the like.

  In the lightning rod system according to the present embodiment, the power source is driven by a power source driving unit that executes processing in accordance with the discharge command.

  The “power supply drive unit” (0314) has a function of receiving a discharge command from the discharge command transmission unit and driving the power supply so as to perform the discharge, and includes an arithmetic device such as a CPU and a main memory, a communication circuit, It can be realized by a drive program or an electronic circuit that does not use an arithmetic device or a program.

  More specifically, an arithmetic unit such as a CPU interprets a power supply driving program, triggered by the reception of a discharge command transmitted from the previous field strength sensor device via a communication circuit, and the power supply according to the interpretation result. For example, a drive command is output. Alternatively, the power supply drive unit may be realized by an electronic circuit configured to output a signal indicating a drive command when a discharge command is input.

  As described above, according to the lightning rod system of the present embodiment, a discharge command is transmitted to the lightning rod device in accordance with the lightning strike sign and start detected by the electric field sensor device, and the lightning rod device uses the lightning rod device for the discharge electrode. It is possible to increase the electron density in the space around the tip of the lightning rod.

<Hardware configuration>
FIG. 6 and FIG. 7 are schematic diagrams showing an example of the configuration of the lightning rod system when the above functional components are realized as hardware. The operation of each hardware component in the discharge process for lightning strike guidance will be described using this figure.

(Electric field sensor device)
FIG. 6 is a diagram illustrating an example of a hardware configuration in the electric field sensor device. As shown in this figure, the electric field sensor device includes a “CPU” (0601) and a “main memory” (0602) for executing various arithmetic processes. It also communicates with a “flash memory” (0603) that holds various information and programs, a “sensor” (0604) for detecting electric field strength connected via an “I / F (interface)”, and a lightning rod device. A “communication circuit” (0605) is also provided. They are connected to each other via a data communication path such as a “system bus” to transmit / receive information and process information.

  Also, the “main memory” is appropriately read out an electric field strength detection program, a judgment program, a discharge command transmission program, etc., and the “CPU” refers to and interprets each read program, and performs various procedures according to the procedure indicated by the program. Perform arithmetic processing. In addition, a plurality of addresses are assigned to each of the “main memory” and “flash memory”, and in the calculation processing of the “CPU”, the addresses are specified and accessed to store the data. It is possible to perform arithmetic processing using.

  First of all, the “CPU” interprets the electric field strength detection program, triggered by the activation of the electric field sensor device or the operation input of the electric field strength detection processing by the user via the “input device” (not shown), and according to the interpretation result The electric field strength output from the “sensor” in a predetermined cycle is sequentially stored in the “main memory”. If the “sensor” detects and outputs the electric field strength, the output value may be stored in the “main memory” as the electric field strength as it is. In addition, if the “sensor” detects an atmospheric voltage using an electrode such as an antenna, a “grounding power source” or “reference power source” (not shown) connected via an “I / F” is connected. A difference value from the input voltage may be calculated by a calculation process of “CPU”, and the calculated difference value (potential) may be sequentially stored in the “main memory” as the electric field strength.

  Next, the “CPU” interprets the judgment program, and according to the interpretation result, the change pattern of the electric field strength sequentially stored in the “main memory” substantially matches the predetermined pattern determined in advance by the judgment program or the like. A process for determining whether to perform the process is executed. If the coincidence rate becomes 80% or more, for example, the thundercloud approaches and the thundercloud indicates that there is a lightning strike. The judgment is output.

  Then, the “CPU” interprets the discharge command transmission program according to the determination result, and transmits the discharge command from the “communication circuit” to the lightning rod device according to the interpretation result.

  Alternatively, instead of the arithmetic processing by the CPU and each program as described above, as described above, the “sensor” is connected to an “electronic circuit” composed of a resistor, an operational amplifier, a logic gate, etc., thereby executing the above processing. You may do it. Specifically, as the determination unit, the first electronic circuit is configured to output a signal only when a change in electric field strength sequentially input is a predetermined pattern. And as a discharge command transmission part, when the output signal from a 1st electronic circuit is input into a 2nd electronic circuit, the signal which shows a discharge command is output. In this manner, a discharge command can be transmitted when the electric field intensity change pattern detected by the “sensor” is a predetermined pattern.

(Lightning rod device)
FIG. 7 is a diagram illustrating an example of a hardware configuration in the lightning rod device. As shown in this figure, the lightning rod device includes a “CPU” (0711) and a “main memory” (0712) for executing various arithmetic processes. In addition, a “communication circuit” (0713), a “power supply” (0714) for discharge electrodes connected via an “I / F (interface)”, and the like are also provided. They are connected to each other via a data communication path such as a “system bus” to transmit / receive information and process information. The “main memory” reads the power supply driving program as appropriate, and the “CPU” refers to and interprets the read program, and executes arithmetic processing for power supply according to the procedure indicated by the program.

  The “power source” is connected to the “discharge electrode” (0715) by an electric wire or the like, and a plurality of “lightning rods” (0716) are disposed around the discharge electrode.

  Here, when a discharge command transmitted from the electric field sensor device is received via the “communication circuit”, the “CPU” interprets the power supply drive program and outputs a drive command to the “power supply” according to the interpretation result.

  Then, the “power supply” that has received the drive command generates a voltage of 15000 V using, for example, its own power generation function, and applies the voltage to the “discharge electrode” via the electric wire.

  Then, discharge occurs in the discharge electrode according to the applied voltage, and charges are applied to the “lightning rod” disposed around the discharge electrode. Then, electrons are emitted from the tip of the “lightning rod”, the electron density in the space around the tip of the lightning rod increases, and ionization of the space occurs. Then, a lightning strike between a thundercloud and a lightning rod is guided and generated from the ionized space as a starting point or an ending point.

  Note that, similarly to the electric field sensor device, the lightning rod device may execute the above processing by an “electronic circuit” that does not have a CPU instead of the arithmetic processing by the CPU or each program. Specifically, as the power supply drive unit, the electronic circuit is configured to output a signal indicating a drive command when a signal indicating a discharge command is input. In this way, the power supply can be driven in response to receiving the discharge command.

<Process flow>
FIG. 8 is a flowchart showing an example of a processing flow in the lightning rod system of the present embodiment. The steps shown below may be steps executed by each hardware configuration of the computer as described above, or may be processing steps that constitute a program for controlling the computer recorded on a medium. I do not care. Further, it may be a processing step in which a part thereof is realized by an analog electronic circuit.

  As shown in this figure, first, the electric field sensor device detects a change in electric field strength in the vicinity of the installation location of the lightning rod device (electric field strength detection step: S0801). Then, it is determined whether or not the detected change in electric field intensity indicates a predetermined pattern (determination step: S0802), and if the determination result is a determination result that the change in electric field intensity indicates a predetermined pattern, a lightning rod. A discharge command is transmitted to the apparatus (discharge command transmission step: S0803).

  Then, the lightning rod device receives the discharge command from the discharge command transmission step S0803 and drives the power supply so as to discharge (power supply drive step: S0811). Then, a discharge to the lightning rod occurs at the discharge electrode by applying a voltage from the power source, and accordingly, electrons are emitted from the lightning rod to the surrounding space, and a lightning strike is induced.

<Brief description of effect>
As described above, in the lightning rod system of the present embodiment, it is possible to induce lightning by discharging to the lightning rod by applying a voltage from the power source at the timing of lightning sign and beginning detected by the electric field sensor device. That is, it is possible to guide only the lightning that really falls without unnecessarily inducing lightning, and thus, it is possible to provide a lightning rod system that can prevent lightning strikes on the object to be protected.

<< Example 2 >>
<Overview>
The lightning rod system of this embodiment is characterized in that, based on the above embodiment, the discharge command is transmitted from the electric field sensor device to the lightning rod device via an optical fiber.

<Functional configuration>
FIG. 9 is a diagram illustrating an example of functional blocks in the lightning rod system of the present embodiment. As shown in this figure, the lightning rod system of the present embodiment is composed of an “electric field sensor device” (0900) and a “lightning rod device” (0910) based on the first embodiment. It should be noted that the “electric field intensity detection unit” (0901), “determination unit” (0902), “discharge command transmission unit” (0903) in the electric field sensor device, “lightning rod” (0911) in the lightning rod device, and “discharge electrode” ”(0912),“ Power supply ”(0913), and“ Power supply drive unit ”(0914) are the same as those described in the first embodiment, and a description thereof will be omitted.

  The feature point of the lightning rod system of the present embodiment is that a “fiber connection” (0920) is further provided between the “electric field sensor device” and the “lightning rod device”.

  The “fiber connection unit” (0920) includes an optical fiber that transmits a discharge command from the discharge command transmission unit to the power supply drive unit. In addition to the optical fiber, a photoelectric conversion function for transmitting the discharge command through the optical fiber is used. It can be realized by an optical communication circuit or the like.

<Brief description of effect>
Since the optical fiber in the lightning rod system of the present embodiment is mainly composed of an insulating material such as quartz glass or germanium, when a lightning strike occurs in the lightning rod device, the current flows through the optical fiber which is the transmission line of the discharge command. There is no worry of reaching the electric field sensor device and destroying the electric field sensor device.

Example 3
<Overview>
The lightning rod system of the present embodiment, based on the above-described embodiment, shows a change pattern of the electric field strength that is a criterion for transmitting the discharge command, with both a gradual increase in the electric field strength and a rapid decrease in the electric field strength. It is characterized by a pattern.

<Functional configuration>
FIG. 10 is a diagram illustrating an example of functional blocks in the lightning rod system of the present embodiment. As shown in this figure, the lightning rod system of the present embodiment is composed of an “electric field sensor device” (1000) and a “lightning rod device” (1010) based on the first embodiment. It should be noted that the “electric field intensity detection unit” (1001), “determination unit” (1002), “discharge command transmission unit” (1003) in the electric field sensor device, “lightning rod” (1011) in the lightning rod device, and “discharge electrode” ”(1012),“ Power supply ”(1013), and“ Power supply drive unit ”(1014) are as described in the first embodiment, and thus the description thereof is omitted. Further, on the basis of the second embodiment, a “fiber connection portion” (not shown) may be further provided.

  In the lightning rod system of the present embodiment, the electric field intensity detection unit of the electric field sensor device further includes “gradual increase detection means” (1004) and “rapid decrease detection means” (1005), and the determination unit further includes It is characterized by having “increase / decrease judging means” (1006).

  The “gradual increase detection means” (1004) has a function of detecting a gradual increase in electric field strength. Specifically, for example, the band is set to 0.05 Hz, and a change in electric field strength that increases by 1 kV / m in 3 seconds is detected as a gradual increase.

  The “rapid decrease detecting means” (1005) has a function of detecting a rapid decrease in electric field strength. Specifically, for example, the band is set to 300 kHz, and a change in electric field strength that decreases by 100 V / m in 0.5 microseconds is detected as an abrupt decrease.

  Both detection means may be realized by an arithmetic unit such as a CPU or a gradual increase detection program / sudden decrease detection program, for example. As shown in FIGS. 11A and 11B, the electronic circuits 1-A and 1-B shown at the top are provided. The circuit configuration is such that a signal is output only when the potential (electric field strength) between the voltage of the input signal from the antenna and the voltage of the reference power supply gradually increases, and the electronic circuits 2-A and 2-B shown below are This may be realized by a circuit configuration that outputs a signal only when the potential between the voltage of the input signal from the antenna and the reference voltage suddenly decreases.

  “Increase / decrease determination means” (1006) is a function for determining that the gradual increase detection means and the sudden decrease detection means indicate the predetermined pattern when both a gradual increase in electric field strength and a rapid decrease in electric field strength are detected. For example, it can be realized by an arithmetic unit and an increase / decrease determination program.

  Alternatively, the “increase / decrease judging means” is set only when the output signals from both the upper electronic circuits 1-A and 1-B and the lower electronic circuits 2-A and 2-B shown in FIGS. 11A and 11B are received. It can also be realized by using the electronic circuit C that outputs.

  As described above, in the lightning rod system of the present embodiment, when the electric field strength change pattern shows both a gradual increase in electric field strength and a rapid decrease in electric field strength, the thundercloud approaches and It is determined as a change pattern when a lightning strike soon occurs, and a discharge command can be transmitted to the lightning rod device.

  As described above, the lightning rod system of the present embodiment may include a “magnetic field sensor device” instead of or in addition to the electric field sensor device. In this case, the “magnetic field sensor device” preferably includes the “gradual increase detection means”, the “rapid decrease detection means”, and the “increase / decrease determination means” as described above. The explanation regarding “gradual increase detection means”, “sudden decrease detection means”, and “increase / decrease determination means” in the magnetic field sensor device is a component of the above-described electric field sensor device except that the detection target and the determination target are not a field intensity but a magnetic field. Since it is the same as the description, it is omitted.

<Process flow>
FIG. 12 is a flowchart showing an example of a processing flow in the lightning rod system of the present embodiment. Note that the steps shown below may be steps executed by each hardware configuration of the computer, or may be processing steps that configure a program recorded on a medium and controlling the computer. Further, it may be a processing step in which part or all of the processing step is realized by an analog electronic circuit.

  In the present embodiment, the description will focus on the flow of processing relating to the detection of the electric field strength and the determination of the change pattern of the electric field strength. Since the flow of processing relating to other power source driving for discharging has been described in the first embodiment, description thereof is omitted here.

  As shown in this figure, in the lightning rod system of the present embodiment, the electric field sensor device detects a gradual increase in the electric field strength in the vicinity of the installation location of the lightning rod device (gradual increase detection step: S1201), and the electric field strength When a rapid decrease is detected (rapid decrease detection step: S1202), a discharge command is transmitted assuming that the change in electric field intensity indicates a predetermined pattern (discharge command transmission step: S1203).

  Note that the order of the increase / decrease detection step and the sudden decrease detection step may be reversed or simultaneous. And according to the transmitted discharge command, the discharge of the discharge electrode using the power source and the lightning strike induction to the lightning rod are executed by the lightning rod device.

<Brief description of effect>
As described above, with the lightning rod system of the present embodiment, when the electric field strength change pattern shows both a gradual increase in electric field strength and a rapid decrease in electric field strength, the thundercloud approaches and A discharge command can be transmitted to the lightning rod device as a change pattern when a lightning strike soon occurs.

  The above change pattern is considered to be close to the change pattern immediately before the occurrence of a lightning strike from a thundercloud, and therefore, the signs and the beginning of lightning strikes are detected more accurately, and discharge for lightning strike induction is performed accordingly. be able to.

0200 Electric field sensor device 0201 Electric field intensity detection unit 0202 Judgment unit 0203 Discharge command transmission unit 0210 Lightning rod device 0211 Lightning rod 0212 Discharge electrode 0213 Power supply 0214 Power supply drive unit

Claims (7)

A lightning rod system comprising an electric field sensor device and a lightning rod device,
The electric field sensor device includes:
An electric field strength detection unit for detecting a change in electric field strength in the vicinity of the installation location of the lightning rod device;
A determination unit for determining whether the detected change in electric field intensity indicates a predetermined pattern;
A discharge command transmission unit that transmits a discharge command to the lightning rod device when the change in the electric field strength is a determination result indicating a predetermined pattern;
The lightning rod device is:
A lightning rod,
A discharge electrode that discharges against a lightning rod;
A power source for the discharge;
A lightning rod system, comprising: a power source drive unit that receives a discharge command from the discharge command transmission unit and drives a power source to perform the discharge.   The lightning rod system according to claim 1, wherein a plurality of lightning rods are arranged so as to surround the discharge electrode.   The lightning rod system according to claim 1, wherein the discharge electrode has a substantially spherical shape.   The lightning rod system according to any one of claims 1 to 3, further comprising a fiber connection unit including an optical fiber that transmits a discharge command from the discharge command transmission unit to the power supply driving unit. The electric field strength detection unit has a gradual increase detection means for detecting a gradual increase in electric field strength, and a sudden decrease detection means for detecting a sudden decrease in electric field strength,
The determination unit includes an increase / decrease determination unit that determines that both the gradual increase detection unit and the sudden decrease detection unit indicate the predetermined pattern when a gradual increase in electric field strength and a rapid decrease in electric field strength are detected. A lightning rod system according to any one of claims 1 to 4.   The lightning rod system according to any one of claims 1 to 5, wherein a tip of the lightning rod is made of a copper tungsten alloy member. In place of / in addition to the electric field sensor device,
A magnetic field detector that detects changes in the magnetic field near the installation location of the lightning rod device,
A determination unit that determines whether or not the detected change in the magnetic field indicates a predetermined pattern;
7. A magnetic field sensor device comprising: a discharge command transmission unit that transmits a discharge command to the lightning rod device when the change in the magnetic field indicates a predetermined pattern. A lightning rod system according to 1.

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