Electric field intensity acquisition device

Abstract

To provide an electric field intensity acquisition device capable of improving weather resistance by suppressing intrusion of rainwater, dust or the like, and accurately acquiring electric field intensity in the atmosphere.SOLUTION: An electric field intensity acquisition device 1 for acquiring electric field intensity in the atmosphere includes an electric field intensity acquisition sensor 10 for acquiring electric field intensity, a conductive current collecting plate 20 insulated from the electric field intensity acquisition sensor 10 and disposed on an upper side of the electric field intensity acquisition sensor 10, and a case member 30 disposed to cover the electric field intensity acquisition sensor 10 and the current collecting plate 20 and having a side surface member 31 and an upper surface member 33. The upper surface member 33 is non-conductive and has a conical part 34 formed in a conical shape projecting upward, and an eaves part 35 overhanging to the outside of the side surface member 31 on the lower end side of the conical part 34. In the electric field intensity acquisition sensor 10, the upper end side of the side surface member 31 is covered with the eaves portion 34 in the side view of the case member 30.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an electric field intensity acquisition device for acquiring electric field intensity in the atmosphere. [Background technology]

[0002] Conventionally, there is known a lightning warning device that measures the electric field strength in the atmosphere when predicting the occurrence of lightning (for example, Patent Document 1). The lightning warning device described in Patent Document 1 detects a sudden change under predetermined conditions in the electric field value on the ground surface acquired by a sensor, and issues a lightning warning based on the detection result. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 58-789 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the lightning warning device described in Patent Document 1 is installed with the sensors and other components exposed to the atmosphere, which causes problems such as rain and dust getting inside during use and causing early deterioration of the device (sensor).On the other hand, if the sensors and other components are covered with a cover or the like, the electric field is blocked by the cover or the like, which raises concerns about reduced detection accuracy.

[0005] Therefore, an object of the present invention is to provide an electric field intensity acquisition device that can improve weather resistance by preventing the intrusion of rainwater, dust, etc., and that can accurately acquire electric field intensity in the atmosphere. [Means for solving the problem]

[0006] (1) The electric field strength acquisition device of the present invention, which is provided to solve the above-mentioned problems, is an electric field strength acquisition device that acquires electric field strength in the atmosphere, and is characterized by comprising: an electric field strength acquisition sensor that acquires electric field strength; a conductive collector plate that is insulated from the electric field strength acquisition sensor and is arranged above the electric field strength acquisition sensor; and a case member that is arranged to cover the electric field strength acquisition sensor and the collector plate and has side members and a top member, wherein the top member is non-conductive and has a cone-shaped portion that is formed in a cone shape that is convex upward, and an eaves portion that protrudes outward beyond the side member at the lower end of the cone-shaped portion.

[0007] The electric field intensity acquisition device of the present invention, configured as described above in (1), allows rainwater falling on the top surface member to be discharged from the cone-shaped portion toward the eaves portion, thereby preventing rainwater from accumulating on the top surface of the case member and causing electrolytic shielding. This allows the electric field intensity acquisition device of the present invention to improve the accuracy of measuring (acquiring) the electric field intensity. Furthermore, the electric field intensity acquisition device of the present invention, configured as described above in (1), allows rainwater falling on the top surface member to be discharged to the outside of the case member through the cone-shaped portion and the eaves portion. This prevents rainwater and dust from entering the electric field intensity acquisition sensor, thereby improving weather resistance. Various electric field intensity acquisition sensors, such as a surface potential sensor, can be used as the electric field intensity acquisition sensor. The cone-shaped portion of the top surface member (case member) may be formed in a conical or pyramidal shape (e.g., a triangular pyramid, a quadrangular pyramid, a pentagonal pyramid, a hexagonal pyramid, etc.). When the pyramidal portion is formed in a pyramidal shape, it is desirable to have as few corners as possible in order to prevent electric charges from concentrating on corners other than the electric field measurement region.

[0008] (2) The electric field intensity acquisition device of the present invention may be characterized in that, in a side view of the case member, the upper end side of the side member is covered by the eaves portion.

[0009] By configuring the electric field intensity acquisition device of the present invention as described above in (2), the upper end sides of the side members of the case member can be covered by the eaves portion. As a result, the electric field intensity acquisition device of the present invention can cover the joint between the upper end sides of the side members and the top member by the eaves portion, thereby preventing rainwater, dust, etc. from entering through gaps at the joint. Therefore, the electric field intensity acquisition device of the present invention has improved weather resistance.

[0010] (3) The electric field intensity acquiring device of the present invention may be characterized in that the upper surface side of the upper surface member has water repellency.

[0011] By configuring the electric field intensity acquisition device of the present invention as described above in (3), it is possible to prevent rainwater from adhering to and accumulating on the upper surface side of the upper surface member, thereby preventing rainwater from entering from the upper surface side of the upper surface member.

[0012] (4) The electric field intensity acquisition device of the present invention described above may be characterized in that the collector plate is formed in a conical shape and is arranged so as to be convex toward the detection area of ​​the electric field intensity acquisition sensor.

[0013] By configuring the electric field intensity acquisition device of the present invention as described above in (4), the electric charges collected by the current collecting plate can be concentrated toward the detection area of ​​the electric field intensity acquisition sensor. As a result, even when the electric field intensity in the atmosphere is weak, the electric field intensity acquisition device of the present invention can reliably measure the electric charges and acquire the electric field intensity, thereby improving the measurement accuracy of the electric field intensity.

[0014] (5) The electric field intensity acquisition device of the present invention may be characterized in that the case member is made of a non-conductive resin.

[0015] By configuring the electric field intensity acquisition device of the present invention as described above in (5), it is possible to acquire electric field intensity without providing a special opening in the case member, etc. Therefore, according to the electric field intensity acquisition device of the present invention, the electric field intensity acquisition sensor can be covered with the case member, thereby improving weather resistance.

[0016] (6) The electric field intensity acquisition device of the present invention described above may be characterized in that the eaves portion has a waterproofing member on the protruding end side, and the upper end side of the side member is covered with the waterproofing member.

[0017] By configuring the electric field intensity acquisition device of the present invention as described above in (6), the upper end of the side member and the joint with the top member can be covered with a waterproof member. This prevents rainwater flowing down the upper surface of the eaves portion from splashing on the upper end of the side member, thereby improving weather resistance. Here, the waterproof member may be formed, for example, by folding back the protruding end of the eaves portion (the end in the protruding direction) downward and hanging down.

[0018] (7) The electric field intensity acquiring device of the present invention may be characterized in that an apex of the cone-shaped portion that protrudes upward is located above a detection area of ​​the electric field intensity acquiring sensor.

[0019] By configuring the electric field intensity acquisition device of the present invention as described above in (7), the apex of the cone-shaped portion (upper surface member) protruding upward can be positioned above the detection area of ​​the electric field intensity acquisition sensor. This allows the electric field intensity acquisition device of the present invention to suppress variations in the passage of electric charges through the upper surface member and to suppress rainwater and the like from accumulating on the detection area. Therefore, the electric field intensity acquisition device of the present invention can measure (acquire) the electric field intensity with high accuracy.

[0020] (8) The electric field strength acquisition device of the present invention described above may be characterized in that a conductive member having conductivity is arranged on the outer periphery of the electric field strength acquisition sensor, and the collecting plate and the conductive member are insulated.

[0021] By configuring the electric field intensity acquisition device of the present invention as described above in (8), it is possible to maintain an appropriate distance between the current collector plate and the electric field intensity acquisition sensor while maintaining insulation from the case member. Furthermore, by configuring the electric field intensity acquisition device of the present invention as described above in (8), it is possible to easily draw the charges collected by the current collector plate toward the electric field intensity acquisition sensor by the conductive member. Therefore, the electric field intensity acquisition device of the present invention can accurately measure (acquire) the charges collected by the current collector plate with the electric field intensity acquisition sensor.

[0022] (9) The electric field intensity acquiring device of the present invention may be characterized in that the electric field intensity acquiring sensor is detachably disposed with respect to the case member and the current collecting plate.

[0023] By configuring the electric field intensity acquisition device of the present invention as described above in (9), for example, when the electric field intensity acquisition sensor breaks down, only the sensor part can be replaced, making repairs easy and reducing repair costs. Here, the electric field intensity acquisition sensor can use various types of attachment / detachment means, such as one that is fixed with a bolt or the like, or one that can be fixed by fitting or the like. [Effects of the Invention]

[0024] According to the present invention, it is possible to provide an electric field intensity acquisition device that can improve weather resistance by preventing the intrusion of rainwater, dust, etc., and that can accurately acquire the electric field intensity in the atmosphere. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a partially cutaway front view of an electric field intensity acquisition device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a partially cutaway right side view of the electric field intensity acquisition device of FIG. [Figure 3] FIG. 2 is a plan view of the electric field intensity acquisition device of FIG. [Figure 4]2A is a view taken in the direction of the arrow AA in FIG. 1, and FIG. 2B is a view taken in the direction of the arrow BB in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0026] Hereinafter, a field intensity acquisition device 1 according to one embodiment of the present invention will be described in detail with reference to the drawings. Note that each drawing is a schematic representation for ease of understanding, and may differ from the actual shape, size, and arrangement of components. In this embodiment, an example will be described in which the outer shape of the case member 30 in the field intensity acquisition device 1 is circular in plan view, and the upper surface member 33 is conical.

[0027] 1 and 2, the electric field intensity acquisition device 1 of the present invention acquires (measures) the electric field intensity in the atmosphere. The electric field intensity acquisition device 1 includes an electric field intensity acquisition sensor 10, a current collecting plate 20, a conductive member 25, a case member 30, and the like.

[0028] The electric field intensity sensor 10 is configured as, for example, a surface potential sensor (charge detector). The electric field intensity sensor 10 includes a sensor case 11, a sensor unit 12, and the like.

[0029] As shown in FIG. 4(b), the sensor case 11 is formed, for example, in a rectangular parallelepiped shape, and the sensor unit 12 is disposed on the upper surface at one end in the longitudinal direction. The sensor case 11 is detachably attached (for example, by bolts or fitting) to a conductive member 25 (current collector plate 20) described later. That is, the sensor case 11 (electric field intensity acquisition sensor 10) is detachably attached to a case member 30 (see FIG. 1) described later. Also, as shown in FIGS. 1 and 2, wiring 13, such as a power cable, a data logger (also referred to as a logger), and a ground wire, extends from the sensor case 11. The wiring 13 is connected to an appropriate control circuit (not shown) that controls the sensor unit 12. Data related to the electric field intensity acquired by the data logger is analyzed by an appropriate analyzer and output as electric field intensity. The obtained electric field intensity is also used for lightning occurrence prediction, etc.

[0030] The sensor unit 12 can acquire the electric field strength in the atmosphere by measuring the potential (charge) in the detection area. The sensor unit 12 is housed in the sensor case 11 and is disposed on one end side of the sensor case 11. The sensor unit 12 is disposed in the center of an opening 26 (see FIG. 4(b)) of a conductive member 25 (described later) so as to face upward. Therefore, the detection area (not shown) of the sensor unit 12 is formed on the upper side of the sensor unit 12.

[0031] As shown in Figures 1 and 4(b), the conductive member 25 is made of a rectangular conductive metal plate. As shown in Figures 1 and 2, the conductive member 25 is disposed at a distance from a bottom plate 38 of a case member 30 (described later) and is supported on the bottom plate 38 by legs 28. As shown in Figure 4(b), the conductive member 25 has a circular opening 26 formed in its center. The sensor case 11 is attached to the conductive member 25 so that the sensor unit 12 is positioned in the center of the opening 26. The conductive member 25 can induce (draw) the charge collected by the current collector plate 20 toward the sensor unit 12.

[0032] 1 and 4(a), the current collecting plate 20 is made of, for example, a metal plate having electrical conductivity. As shown in FIG. 1, the current collecting plate 20 is supported horizontally on an insulating member 27 that is erected on a conductive member 25. That is, the current collecting plate 20 and the conductive member 25 are insulated by the insulating member 27. In other words, the current collecting plate 20 is insulated from the electric field intensity acquisition sensor 10 and is disposed above the electric field intensity acquisition sensor 10. In other words, the current collecting plate 20 is disposed above the conductive member 25 with a predetermined distance therebetween.

[0033] Moreover, the current collecting plate 20 is formed in a conical shape and is arranged so as to be convex toward the detection area (downward side) of the electric field intensity acquisition sensor 10. The current collecting plate 20 is arranged so that the apex 25a of the cone is located approximately in the center of the detection area of ​​the electric field intensity acquisition sensor 10. Therefore, the electric charges collected by the current collecting plate 20 are concentrated in the center part of the cone. That is, for example, the upper surface side of the current collecting plate 20 is negatively charged and the back side is positively charged, and the positive charge on the back side is detected by the sensor unit 12.

[0034] As shown in Fig. 3, the case member 30 is formed in a circular shape in a plan view. As shown in Fig. 1, the case member 30 is arranged so as to cover the electric field intensity acquisition sensor 10 and the current collecting plate 20. The case member 30 is formed of a non-conductive resin such as ABS or PB (polybutylene), and includes a side member 31, a top member 33, a bottom member 38, and the like.

[0035] The bottom surface member 38 forms the bottom surface of the case member 30 and can be laid on the ground. The side surface members 31 are provided upright on the bottom surface member 38.

[0036] In this embodiment, the side surface member 31 is formed in a cylindrical shape (see FIG. 3) and stands on the bottom surface member 38. The side surface member 31 is formed with an outer diameter (outer shape) that can accommodate the electric field intensity acquisition sensor 10, the current collecting plate 20, and the conductive member 25 therein.

[0037] As described above, the top surface member 33 is formed from a non-conductive resin, and has a spine-shaped portion 34 (in this embodiment, a cone-shaped portion 34) and an eaves portion 35. The top surface side of the top surface member 33 is coated with, for example, a water-repellent coating agent. In other words, the top surface side of the top surface member 33 is made water-repellent.

[0038] As shown in FIGS. 1 and 2 , the pyramidal portion 34 is formed in a pyramidal shape (in this embodiment, a cone shape) that is convex upward. It is desirable that the upper surface of the pyramidal portion 34 be inclined like a pyramid so that rainwater falling on the upper surface side does not accumulate. Furthermore, the apex 34a of the pyramidal portion 34 that protrudes upward is positioned above the detection area of ​​the electric field intensity acquisition sensor 10 (sensor unit 12). Therefore, the pyramidal portion 34 can prevent rainwater and the like from accumulating on at least the upper surface member 33 above the detection area of ​​the sensor unit 12. This allows the pyramidal portion 34 (electric field intensity acquisition device 1) to prevent electric field shielding caused by rainwater and the like when the sensor unit 12 acquires (measures) the electric field intensity. The pyramidal portion 34 may be formed in a pyramidal shape (e.g., a triangular pyramid, a quadrangular pyramid, a pentagonal pyramid, a hexagonal pyramid, etc.) in addition to a conical shape. When the pyramidal portion 34 is formed in a pyramidal shape, it is desirable to reduce the number of corners so that electric charges do not concentrate at the corners of the pyramid.

[0039] The eaves portion 35 is provided at the lower end side of the cone-shaped portion 34 so as to extend outward beyond the side surface member 31. The lower surface side of the eaves portion 35 is joined to the upper end side of the side surface member 31. In other words, the upper surface member 33 is joined to the side surface member 31 at the lower surface side of the eaves portion 35. Therefore, the upper end side of the side surface member 31 is covered by the eaves portion 35 when the case member 30 is viewed from the side (see FIG. 1).

[0040] Furthermore, a waterproof member 36 is provided on the protruding end side (end in the protruding direction) of the eaves portion 35. In this embodiment, the waterproof member 36 is formed by folding back the protruding end side of the eaves portion 35 downward (for example, vertically). That is, the waterproof member 36 is formed in a cylindrical shape along the outer periphery of the eaves portion 35. Therefore, in this embodiment, the upper end side of the side member 31 is covered by the waterproof member 36. In other words, the waterproof member 36 is arranged side by side with a gap between them so as to face the side member 31. Therefore, the joint (sometimes simply referred to as the joint) between the upper end side of the side member 31 and the top surface member 33 (eaves portion 35) is covered by the waterproof member 36. As a result, rainwater falling on the top surface member 33 flows down the cone-shaped portion 34 and is then discharged to the outside of the side member 31, thereby preventing rainwater from adhering to the joint. The upper end side (joint) of the side member 31 may be blocked by the waterproof member 36. Furthermore, the waterproof member 36 does not necessarily have to be formed integrally with the eaves portion 35, but may be joined to the eaves portion 35 as a separate member.

[0041] The above is one embodiment of the electric field intensity acquisition device 1 of the present invention. Next, the effects achieved by the electric field intensity acquisition device 1 of the present invention will be described below.

[0042] <Action and effect> The above-described electric field intensity acquisition device 1 has the following characteristic configurations (a) to (i). Therefore, the electric field intensity acquisition device 1 of the present invention can achieve the following unique effects that cannot be achieved by conventional techniques.

[0043] (a) The electric field strength acquisition device 1 of the present invention is an electric field strength acquisition device 1 that acquires electric field strength in the atmosphere, and is characterized by comprising: an electric field strength acquisition sensor 10 that acquires electric field strength; a conductive collector plate 20 that is insulated from the electric field strength acquisition sensor 10 and is arranged above the electric field strength acquisition sensor 10; and a case member 30 that is arranged to cover the electric field strength acquisition sensor 10 and the collector plate 20 and has side members 31 and an upper surface member 33, wherein the upper surface member 33 is non-conductive and has a cone-shaped portion 34 that is formed in a cone shape that is convex upward, and an eaves portion 35 that protrudes outward beyond the side surface member 31 at the lower end side of the cone-shaped portion 34.

[0044] By configuring the electric field strength acquisition device 1 of the present invention as described above in (a), rainwater falling on the top surface member 33 is discharged from the cone-shaped portion 34 toward the eaves portion 35, thereby preventing rainwater from accumulating on the top surface of the case member 30 and causing electrolytic shielding. This allows the electric field strength acquisition device 1 of the present invention to improve the accuracy of measuring (acquiring) the electric field strength. Furthermore, by configuring the electric field strength acquisition device 1 of the present invention as described above in (a), rainwater falling on the top surface member 33 can be discharged to the outside of the case member 30 through the cone-shaped portion 34 and the eaves portion 35. This prevents rainwater and dust from entering the electric field strength acquisition sensor 10, thereby improving weather resistance. Here, various types of electric field strength acquisition sensors 10, such as a surface potential sensor, can be used as the electric field strength acquisition sensor 10. Furthermore, the pyramidal portion 34 of the upper surface member 33 (case member 30) may be formed in a conical or pyramidal shape (for example, a triangular pyramid, a quadrangular pyramid, a pentagonal pyramid, a hexagonal pyramid, etc.). When the pyramidal portion 34 is formed in a pyramidal shape, it is desirable to have as few corners as possible in order to prevent electric charges from concentrating on corners other than the electric field measurement region.

[0045] (b) The electric field intensity acquisition device 1 of the present invention described above is characterized in that, when the case member 30 is viewed from the side, the upper end side of the side member 31 is covered by the eaves portion 35.

[0046] By configuring the electric field intensity acquisition device 1 of the present invention as described above in (b), the upper end side of the side member 31 of the case member 30 can be covered by the eaves portion 35. As a result, the electric field intensity acquisition device 1 of the present invention can cover the joint between the upper end side of the side member 31 and the top surface member 33 by the eaves portion 35, thereby preventing rainwater, dust, and the like from entering through gaps at the joint. Therefore, the electric field intensity acquisition device 1 of the present invention has improved weather resistance.

[0047] (c) The electric field intensity acquisition device 1 of the present invention described above is characterized in that the upper surface side of the upper surface member 33 has water repellency.

[0048] By configuring the electric field intensity acquisition device 1 of the present invention as described above in (c), it is possible to prevent rainwater from adhering to and accumulating on the upper surface side of the upper surface member 33. This makes it possible for the electric field intensity acquisition device 1 of the present invention to prevent rainwater from entering from the upper surface side of the upper surface member 33.

[0049] (d) The electric field intensity acquisition device 1 of the present invention described above is characterized in that the collector plate 20 is formed in a conical shape and is arranged so as to be convex toward the detection area of ​​the electric field intensity acquisition sensor 10.

[0050] By configuring the electric field intensity acquisition device 1 of the present invention as described above in (d), the electric charges collected by the current collecting plate 20 can be concentrated toward the detection area of ​​the electric field intensity acquisition sensor 10. As a result, the electric field intensity acquisition device 1 of the present invention can reliably measure the electric charges and acquire the electric field intensity even when the electric field intensity in the atmosphere is weak, thereby improving the measurement accuracy of the electric field intensity.

[0051] (e) The electric field intensity acquisition device 1 of the present invention described above is characterized in that the case member 30 is made of a non-conductive resin.

[0052] By configuring the electric field intensity acquisition device 1 of the present invention as described above in (e), it is possible to acquire the electric field intensity without providing a special opening or the like in the case member 30. Therefore, according to the electric field intensity acquisition device 1 of the present invention, the electric field intensity acquisition sensor 10 can be covered with the case member 30, thereby improving weather resistance.

[0053] (f) The electric field strength acquisition device 1 of the present invention described above is characterized in that the eaves portion 35 has a waterproof member 36 on the protruding end side, and the upper end side of the side member 31 is covered with the waterproof member 36.

[0054] By configuring the electric field intensity acquisition device 1 of the present invention as described above in (f), the upper end side of the side member 31 and the joint with the top surface member 33 can be covered with the waterproof member 36. This makes it possible for the electric field intensity acquisition device 1 of the present invention to prevent rainwater flowing over the upper surface of the eaves portion 35 from splashing on the upper end side of the side member 31, thereby improving weather resistance. Here, the waterproof member 36 may be formed, for example, by folding back the protruding end side (the end in the protruding direction) of the eaves portion 35 downward and causing it to hang down.

[0055] (g) The electric field intensity acquisition device 1 of the present invention described above is characterized in that the apex 34 a protruding upward in the cone-shaped portion 34 is located above the detection area of ​​the electric field intensity acquisition sensor 10 .

[0056] By configuring the electric field intensity acquisition device 1 of the present invention as described above in (g), the apex 34a protruding upward of the cone-shaped portion 34 (upper surface member 33) can be positioned above the detection area of ​​the electric field intensity acquisition sensor 10. This allows the electric field intensity acquisition device 1 of the present invention to suppress variations in the passage of electric charges through the upper surface member 33, and also to suppress rainwater and the like from accumulating on the detection area. Therefore, the electric field intensity acquisition device 1 of the present invention can measure (acquire) the electric field intensity with high accuracy.

[0057] (h) The electric field intensity acquisition device 1 of the present invention described above is characterized in that a conductive member 25 having conductivity is arranged on the outer periphery of the electric field intensity acquisition sensor 10, and the current collector plate 20 and the conductive member 25 are insulated.

[0058] By configuring the electric field intensity acquisition device 1 of the present invention as described above in (h), it is possible to maintain an appropriate distance between the current collector plate 20 and the electric field intensity acquisition sensor 10 while maintaining insulation from the case member 30. Furthermore, by configuring the electric field intensity acquisition device 1 of the present invention as described above in (h), it is possible to easily draw the charges collected by the current collector plate 20 toward the electric field intensity acquisition sensor 10 by the conductive member 25. Therefore, the electric field intensity acquisition device 1 of the present invention can accurately measure (acquire) the charges collected by the current collector plate 20 by the electric field intensity acquisition sensor 10.

[0059] (i) The electric field intensity acquisition device 1 of the present invention described above is characterized in that the electric field intensity acquisition sensor 10 is detachably disposed with respect to the case member 30 and the current collector plate 20 .

[0060] By configuring the electric field intensity acquisition device 1 of the present invention as described above in (i), when the electric field intensity acquisition sensor 10 breaks down, for example, only the sensor portion can be replaced, making repairs easy and reducing repair costs. Here, the electric field intensity acquisition sensor 10 can use various types of attachment / detachment means, such as one that is fixed with a bolt or the like, or one that can be fixed by fitting or the like.

[0061] <<Variations>> The above are the effects obtained by the electric field intensity acquisition device 1 according to one embodiment of the present invention, but the electric field intensity acquisition device 1 is not limited to the above embodiment and various modifications can be made within the scope of the present invention. For example, the electric field intensity acquisition device 1 may be formed in various shapes and sizes as long as it is similar to the above (a). Furthermore, the electric field intensity acquisition device 1 of the present invention may not have some or all of the configurations according to the above (b) to (i), or may have some or all of the above (b) to (i) and other configurations.

[0062] In this embodiment, the electric field strength acquired by the electric field strength acquisition device 1 is used to predict lightning occurrence, but the electric field strength acquisition device 1 can be used to acquire various electric field strengths. The electric field strength acquisition device 1 of the present invention can be used, particularly, in environments where there is a risk of splashing water, etc. Furthermore, in this embodiment, a potential sensor or a charge detector is exemplified as the electric field strength acquisition sensor 10, but the present invention is not limited to this, and various types of sensors can be used for the electric field strength acquisition sensor 10. Furthermore, various shapes and sizes can be used for the electric field strength acquisition sensor 10. Furthermore, the arrangement position, size, shape, etc. of the current collecting plate 20 can be appropriately changed depending on the shape, size, and mode of the electric field strength acquisition sensor 10.

[0063] The case member 30 can be made of various shapes, sizes, and materials capable of covering the electric field intensity acquisition sensor 10 and the current collecting plate 20. For example, the side surface members 31 and the top surface member 33 of the case member 30 may be integrally formed, or the case member 30 may not include the bottom surface member 38. In the present embodiment, the case member 30 includes an eaves portion 35, the protruding end of which extends beyond the side surface members 31. However, the case member 30 may not include the eaves portion 35. When the eaves portion 35 is formed, the shape, size, etc. of the eaves portion 35 can be changed to various shapes, sizes, etc. The pyramidal portion 34 of the case member 30 may be not only conical but also pyramidal (e.g., triangular, square, pentagonal, hexagonal, etc.). When the pyramidal portion 34 is pyramidal, it is preferable that the number of corners is reduced. The case member 30 may be placed directly on the ground or installed via other members.

[0064] In this embodiment, when the case member 30 is viewed from the side, the upper end side of the side member 31 is covered by the eaves portion 35, but the present invention is not limited to this. For example, the upper end side of the side member 31 may not be covered by the eaves portion 35 (for example, the side member 31 may not have the eaves portion 35). In such a case, it is desirable that the upper end side of the side member 31 is connected to the lower end side of the top surface member 33 (the joint is closed), or that the vicinity of the upper end side of the side member 31 is subjected to a water-repellent treatment.

[0065] In this embodiment, the upper surface side of the upper surface member 33 is water-repellent, but the upper surface side of the upper surface member 33 may be subjected to a water-repellent treatment as necessary. For example, the upper surface side of the upper surface member 33 may be hydrophilic. In such a case, it is desirable to provide an inclined cone-shaped portion 34 or the like on the upper surface member 33 so that rainwater, etc., flows down from the upper surface of the upper surface member 33.

[0066] In this embodiment, the current collecting plate 20 is formed in a conical shape and is arranged so as to be convex toward the detection area of ​​the electric field intensity acquisition sensor 10, but the present invention is not limited to this. For example, the current collecting plate 20 may be formed in a polygonal pyramid shape other than a cone, or may be formed in a flat shape, and various shapes, sizes, and configurations may be used for the current collecting plate 20.

[0067] In this embodiment, the case member 30 is formed from a non-conductive resin, but the present invention is not limited to this. The case member 30 can be made from various materials, regardless of whether they are non-conductive or conductive. From the viewpoint of reducing the influence on the electric field to be acquired (measured), it is desirable that the case member 30 be made from a non-conductive material. For example, the case member 30 may be made from a non-conductive material (glass, etc.) other than a non-conductive metal or non-conductive resin.

[0068] In this embodiment, the waterproof member 36 is provided on the protruding end side of the eaves portion 35, but the waterproof member 36 may be provided as needed, and the configuration may also include no waterproof member 36. Furthermore, when the waterproof member 36 is provided, the waterproof member 36 may be of various shapes, sizes, and materials as long as it is capable of covering the upper end side of the side member 31. For example, the waterproof member 36 may be a sheet material such as nylon. Furthermore, the waterproof member 36 need not necessarily be formed integrally with the eaves portion 35, but may be formed as a separate member that can be attached and detached to the eaves portion 35 later.

[0069] In this embodiment, the apex 34a protruding upward in the cone-shaped portion 34 is located above the detection area of ​​the electric field intensity acquisition sensor 10, but the apex 34a does not necessarily have to be located above the detection area. In such a case, it is desirable for the apex 34a of the cone-shaped portion 34 to be located near the top of the detection area of ​​the electric field intensity acquisition sensor 10 in order to improve the current collection effect.

[0070] In this embodiment, the conductive member 25 having conductivity is arranged on the outer periphery of the electric field intensity acquisition sensor 10, and the current collecting plate 20 and the conductive member 25 are insulated, but the present invention is not limited to this. The conductive member 25 may be provided as needed, and for example, the conductive member 25 may not be arranged on the outer periphery of the electric field intensity acquisition sensor 10. Also, a non-conductive member may be provided instead of the conductive member 25.

[0071] In this embodiment, the electric field intensity acquisition sensor 10 is arranged so as to be detachable from the case member 30 and the collector plate 20, but the present invention is not limited to this, and for example, the electric field intensity acquisition sensor 10 may be fixed to the case member 30 and the collector plate 20.

[0072] The above are various embodiments and variations of the electric field intensity acquisition device according to the present invention, but the present invention is not limited to the examples given in the above-mentioned embodiments and variations, and it will be readily apparent to those skilled in the art that other embodiments are possible within the scope of the claims in accordance with the teachings and spirit of the present invention. [Industrial Applicability]

[0073] The present invention can be used to acquire (measure) the electric field strength in the atmosphere, and can be particularly preferably used to acquire the electric field strength used for predicting the occurrence of lightning. [Explanation of symbols]

[0074] 1: Field strength acquisition device 10: Electric field strength acquisition sensor 12: Sensor section 20: Current collector plate 25: Conductive material 26: Opening 27: Insulating material 30: Case material 31: Side member 33: Top member 34: Conical part (pyramidal part) 34a: Vertex 35: Eaves 36: Waterproofing materials 38: Bottom member (bottom plate)

Claims

1. An electric field strength acquisition device for acquiring an electric field strength in the atmosphere, an electric field intensity acquisition sensor that acquires electric field intensity; a conductive current collecting plate insulated from the electric field intensity acquiring sensor and disposed above the electric field intensity acquiring sensor; a case member arranged to cover the electric field intensity acquisition sensor and the current collecting plate, the case member having a side member and a top member; Equipped with The upper surface member is It is non-conductive, a cone-shaped portion formed in a cone shape that is convex upward; an eaves portion that extends outward beyond the side surface member at a lower end side of the cone-shaped portion; The electric field intensity acquisition device according to claim 1,

2. The electric field intensity acquiring device according to claim 1 , wherein, in a side view of the case member, an upper end side of the side member is covered by the eaves portion.

3. The electric field intensity acquiring device according to claim 1 , wherein the upper surface side of the upper surface member is water-repellent.

4. 3. The electric field intensity acquiring device according to claim 1, wherein the current collecting plate is formed in a cone shape and is disposed so as to be convex toward a detection area of ​​the electric field intensity acquiring sensor.

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