Mine-attracting device

Abstract

This lightning conduction device comprises a protruding needle 11, intermediate conductors 12, a lowest-section conductor 13, and switch units 20. The protruding needle 11, N intermediate conductors 12, and the grounded lowest-section conductor 13 are connected in the sky direction with N+1 switch units 20 interposed therebetween. By turning all of the switch units 20 ON, the protruding needle 11 and all of the intermediate conductors 12 are instantly grounded.

Description

Technical Field

[0001] The present invention relates to a lightning induction device.

Background Art

[0002] In anticipation of the era of increased lightning strikes due to the extreme weather, research and development of technologies for controlling lightning and eliminating lightning strike damage to people and facilities have been carried out. Non-Patent Documents 1 and 2 describe rocket lightning induction in which a small rocket equipped with a conductive wire is launched towards a thundercloud.

[0003] Generally, since the electric field strength is high at the tip of a highly conductive structure, it is easy to attract lightning strikes. On the other hand, corona discharge is likely to occur at the tip of a high structure due to electric field concentration. When a thundercloud approaches, the corona charges generated along with the corona discharge spread into the air to form a charge layer. This charge layer acts as an electrostatic shield against the high structure and weakens the electric field strength at its tip. That is, the electric field concentration near the tip of a normal high structure is not ideal. Note that corona charges are cations generated by electrons detaching from gas molecules along with an electron avalanche, and charged aerosols generated by aerosols adhering to these cations.

[0004] Rocket lightning induction breaks the influence of the corona charge layer by the speed of the rocket. Specifically, in view of the fact that the diffusion speed of corona charges is approximately 100 m / s, a conductive wire is extended from the ground towards the sky at a speed of 100 m / s or more using a rocket. Although corona discharge occurs at the tip of the rocket, since the rocket speed is faster than the diffusion of corona charges, the tip of the rocket is not affected by the shielding effect of corona charges, and ideal electric field concentration is achieved. As a result, the corona discharge at the tip of the rocket changes into an upward leader and induces a lightning strike.

Prior Art Documents

Non-Patent Documents

[0005]

Non-Patent Document 1

[0006] However, rocket launches involve the use of explosives, making them dangerous, and there are legal restrictions on their storage, transportation, and use. If the rocket lightning strike fails, the rocket and wires will fall, requiring a sufficient distance from the launch site, making it difficult to conduct such launches in urban areas. Furthermore, the rockets are disposable, and if the lightning strike is successful, the wires will also melt and break due to the lightning. For these reasons, it is difficult to launch rockets continuously in a short period of time.

[0007] This invention has been made in view of the above, and aims to induce lightning strikes more safely. [Means for solving the problem]

[0008] A lightning induced device according to one aspect of the present invention is a lightning induced device for inducing lightning strikes, comprising a plurality of conductors, a plurality of switches arranged between the plurality of conductors and switching the conductivity state between the conductors, one of the plurality of conductors being grounded, and the plurality of conductors being connected upwards via the plurality of switches. Depending on the signal transmitted by the worker All of the aforementioned switches Switch on and off As a result, all of the aforementioned multiple conductors Switching between a state where the conductors are electrically connected and grounded, and a state where the multiple conductors are not electrically connected to each other. . [Effects of the Invention]

[0009] According to the present invention, lightning strikes can be induced more safely. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 shows an example of the configuration of the lightning strike device according to this embodiment. [Figure 2] Figure 2 shows an example of the configuration of the switch unit. [Figure 3] Figure 3 shows an example of an equipotential surface when the switch is OFF. [Figure 4] Figure 4 shows an example of an equipotential surface when the switch is ON. [Modes for carrying out the invention]

[0011] Embodiments of the present invention will be described below with reference to the drawings.

[0012] Figure 1 shows an example of the configuration of the lightning striker according to this embodiment. The lightning striker shown in the figure consists of a spike 11, N (N is a natural number) intermediate conductors 12, and a bottom conductor 13, connected in the upward direction (vertically) by N+1 switch units 20. When a thunderstorm approaches, a lightning strike is induced by turning on the switch units 20 (hereinafter also referred to as switches). N is, for example, 50, but is not limited to this.

[0013] The lightning rod 11 is a so-called lightning rod and is positioned on the upper surface of the switch section 20 at the top. For example, a metal rod or pipe with a length of 500 mm and a diameter of 20 mm can be used as the lightning rod 11. It is desirable that the tip of the lightning rod 11 be sharpened.

[0014] The intermediate conductor 12 is a conductor that electrically connects the upper and lower switch sections 20. The intermediate conductor 12 is connected to the upper pin 11 or intermediate conductor 12 via the upper switch section 20, and to the lower intermediate conductor 12 or the lowest conductor 13 via the lower switch section 20. For example, the intermediate conductor 12 may have a length of 2000 mm and a nominal cross-sectional area of ​​60 mm². 2 Use stranded copper wire. All intermediate conductors 12 do not need to be the same size or material.

[0015] The lowest conductor 13 is a grounded conductor located on the underside of the lowest switch section 20. For example, the lowest conductor 13 may have a length of 1000 mm and a nominal cross-sectional area of ​​60 mm². 2A copper stranded wire is used. It is desirable that the length of the lowermost conductor 13 be about half the length of the intermediate conductor 12.

[0016] The sizes and numbers of the push pins 11, the intermediate conductors 12, and the lowermost conductors 13 are not limited to the above examples. The intermediate conductors 12 and the lowermost conductors 13 do not have to be in the form of electric wires such as copper stranded wires, and may be metal bars.

[0017] The switch unit 20 is disposed between the conductors (the push pins 11, the intermediate conductors 12, and the lowermost conductors 13) and switches the conduction state between the conductors. When the switch unit 20 is ON, the conductors connected to the upper side and the conductors connected to the lower side are electrically connected. When the switch unit 20 is OFF, the conductors connected to the upper side and the conductors connected to the lower side are insulated. When all the switch units 20 are turned ON, the push pins 11 and all the intermediate conductors 12 are grounded.

[0018] An example of the configuration of the switch unit 20 is shown in FIG. 2. The switch unit 20 includes terminals 22 on the upper and lower surfaces of an insulator housing 21 such as Fiber Reinforced Plastics (FRP). The push pins 11, the intermediate conductors 12, or the lowermost conductors 13 are electrically connected to the upper and lower terminals 22, respectively.

[0019] Each of the upper and lower contact points 23 is in conduction with each of the upper and lower terminals 22 and is arranged to be separated within the housing 21. The contact points 23 are preferably spherical. Thereby, when the switch is OFF, the electric field concentration at the lower end of the push pin 11, the upper and lower ends of the intermediate conductor 12, and the upper end of the lowermost conductor 13 can be inhibited, and corona discharge can be suppressed. [[ID=�17]]

[0020] The contactor 24 is a conductor that conducts or insulates between the two contact points 23. By bringing the contactor 24 into contact with each of the two contact points 23, the two contact points 23 are electrically connected. In the example of FIG. 2, the contact portion of the contact point 23 with the contactor 24 is made flat according to the shape of the contactor 24. When the contactor 24 contacts the two contact points 23, the switch is turned ON (the upper and lower conductors are electrically connected), and when the contactor 24 separates from the contact points 23, the switch is turned OFF (the upper and lower conductors are insulated).

[0021] The drive unit 26 moves the contact 24 via the insulator 25 to switch the switch between ON and OFF. Specifically, the drive unit 26 moves the insulator 25 to the right in the drawing to bring the contact 24 into contact with the two contacts 23 to turn the switch ON, and moves the insulator 25 to the left in the drawing to separate the contact 24 from the contact 23 to turn the switch OFF.

[0022] The receiving unit 27 receives a wireless signal through the antenna 28 and drives the drive unit 26 according to the received wireless signal. Specifically, when the receiving unit 27 receives a switch ON command, it drives the drive unit 26 so that the contact 24 contacts the contact 23. When the receiving unit 27 receives a switch OFF command, it drives the drive unit 26 so that the contact 24 separates from the contact 23.

[0023] The battery 29 supplies power to the drive unit 26 and the receiving unit 27. By including the battery 29 in the switch unit 20, there is no need to wire a power line from the ground. If a power line is wired from the ground to each switch unit 20, corona discharge may occur from the top of the power line, which may reduce the effect of the lightning protection device. Note that the battery 29 may be replaced periodically or charged using a wireless power supply mechanism.

[0024] The support tower 30 is an insulator that supports the switch unit 20. The support tower 30 is constructed of FRP or wood. In FIG. 1, the switch unit 20 is supported by the support tower 30, but other main components besides the switch unit 20 may be supported. Instead of the support tower 30, the tip pin 11 or the top switch unit 20 may be lifted by a lightning-resistant drone or the like.

[0025] Next, referring to FIGS. 3 and 4, the lightning induction method by the lightning protection device of the present embodiment will be described.

[0026] Under normal circumstances, the lightning strike device switch is OFF. When the lightning strike device switch is OFF, the conductors are insulated, and as shown in Figure 3, the electric field near the top of the lightning strike device does not become strong. In Figures 3 and 4, the solid lines extending vertically from the ground represent the conductors of the lightning strike device. The breaks in the solid lines indicate that the switch is OFF. The dashed lines in the horizontal direction represent equipotential surfaces.

[0027] At the moment you want to induce a lightning strike, all the switches on the lightning retrieval device are turned ON. For example, at the moment you want to induce a lightning strike, an operator sends a switch-ON command to all the switches. When all the switches are ON, all the conductors are instantly grounded, and as shown in Figure 4, the equipotential surfaces become convex upwards, and the spacing between the equipotential surfaces near the top of the lightning retrieval device becomes very narrow. In other words, the electric field strength near the top of the lightning retrieval device becomes very strong. As a result, dielectric breakdown begins at the top of the lightning retrieval device before the corona charge can diffuse, and a plasma path called a leader extends towards the cloud. When the leader reaches the charge in the cloud, the charge in the cloud is neutralized through this plasma path, and a large current flows through the lightning retrieval device (lightning strike).

[0028] Even if the initial attempt to attract lightning fails, this lightning attractor can be immediately retried by simply switching it OFF and ON. Furthermore, as long as the conductor and switch are strong enough not to be destroyed by a lightning strike, this lightning attractor can attempt to attract lightning repeatedly.

[0029] As described above, the lightning striker of this embodiment connects the spike 11, the intermediate conductor 12, and the grounded lowest conductor 13 upwards via the switch unit 20, and by turning on all of the switch unit 20, the spike 11 and the intermediate conductor 12 are instantly grounded. This makes it possible to achieve an ideal electric field concentration at the upper end of the lightning striker, and to induce a lightning strike at the intentional timing of turning on the switch. By intentionally generating a lightning strike and neutralizing the cloud charge, it is possible to prevent lightning strikes on people, buildings, and equipment in the surrounding area.

[0030] Because the lightning induced device of this embodiment does not launch a rocket, it can induce lightning strikes more safely and can be installed in urban areas. Furthermore, since it does not require explosives, it does not require any legal regulations. [Explanation of Symbols]

[0031] 11 Needle 12 Intermediate conductor 13. Bottom conductor 20 Switch section 21 cabinets 22 terminals 23 contacts 24 Contactors 25 Insulator 26 Drive unit 27 Receiving section 28 Antennas 29 batteries 30 Support Tower

Claims

1. A lightning attracting device that induces lightning strikes, Multiple conductors, The system includes a plurality of switches arranged between the plurality of conductors, which switch the conductivity state between the conductors, One of the plurality of conductors is grounded, and the plurality of conductors are connected upwards via the plurality of switches. By switching all of the multiple switches on and off in response to a signal transmitted by the operator, the system switches between a state in which all of the multiple conductors are conductive and grounded, and a state in which the multiple conductors are not conductive to each other. Lightning arrester.

2. A lightning strike device according to claim 1, The aforementioned switch is Two terminals electrically connected to each of the upper and lower conductors, Two contacts, which are electrically connected to each of the two aforementioned terminals and are spaced apart from each other, The system includes a contactor that makes contact with the two aforementioned contacts, thereby making the two contacts electrically conductive and turning on the switch. Lightning arrester.

3. A lightning strike device according to claim 2, The aforementioned switch is A receiving unit that receives a wireless signal to switch the aforementioned switch on or off, A drive unit that moves the contactor in accordance with the aforementioned wireless signal, The receiving unit and the drive unit are equipped with a battery that supplies power to them. Lightning arrester.

4. A lightning strike device according to any one of claims 1 to 3, The tip of the conductor positioned at the top is pointed, The length of the conductor that is grounded is half the length of the other conductors. Lightning arrester.

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