WO2017130652A1 - Matériau de blindage contre les ondes radio, mortier, dispositif de fusion de neige, blindage contre les ondes radio, et structure - Google Patents

Matériau de blindage contre les ondes radio, mortier, dispositif de fusion de neige, blindage contre les ondes radio, et structure Download PDF

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Publication number
WO2017130652A1
WO2017130652A1 PCT/JP2017/000191 JP2017000191W WO2017130652A1 WO 2017130652 A1 WO2017130652 A1 WO 2017130652A1 JP 2017000191 W JP2017000191 W JP 2017000191W WO 2017130652 A1 WO2017130652 A1 WO 2017130652A1
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Prior art keywords
radio wave
wave shielding
wave shield
mortar
fine wires
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PCT/JP2017/000191
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English (en)
Japanese (ja)
Inventor
洋介 伊藤
伸二 河邊
渡邊　実
Original Assignee
国立大学法人名古屋工業大学
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Priority to JP2017563761A priority Critical patent/JP7072214B2/ja
Publication of WO2017130652A1 publication Critical patent/WO2017130652A1/fr

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E01C11/24—Methods or arrangements for preventing slipperiness or protecting against influences of the weather
    • E01C11/26—Permanently installed heating or blowing devices ; Mounting thereof
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H5/00—Removing snow or ice from roads or like surfaces; Grading or roughening snow or ice
    • E01H5/10—Removing snow or ice from roads or like surfaces; Grading or roughening snow or ice by application of heat for melting snow or ice, whether cleared or not, combined or not with clearing or removing mud or water, e.g. burners for melting in situ, heated clearing instruments; Cleaning snow by blowing or suction only
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/16—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate against adverse conditions, e.g. extreme climate, pests
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields

Definitions

  • the present invention relates to a radio wave shielding material that exhibits a remarkable radio wave shielding effect for a specific frequency, a mortar having the radio wave shielding material, and a snow melting device.
  • Patent Document 1 describes a radio wave shielding material in which a non-conductive film made of a resin with an adhesive is affixed to glass, and conductor wires and the like are arranged at equal intervals on the non-conductive film. .
  • the radio wave shielding material shields radio waves having a specific frequency.
  • the public road X1 has snow removal measures taken by the local government or a snow melting device is installed.
  • inhabitants have to do X2 in the private site of private property, especially when the path to the house and the public road is long, which is a heavy burden on the inhabitants.
  • a means for melting snow there are spraying of a snow melting agent, snow melting using a heating wire or ground water.
  • snow melting agents cause salt damage to concrete and plants and corrosion to steel frames.
  • a snow melting device using a heating wire has problems such as disconnection and electric leakage, maintainability, power consumption, and slow start-up.
  • Melting snow due to groundwater has problems such as ground deterioration and soiling of road surfaces due to minerals contained in groundwater.
  • Non-Patent Document 1 describes a snow melting device using a radio wave oscillator and a heat generating mortar block corresponding to snow melting in a snowfall area. Near the surface of the heat generating mortar block, a wire mesh is installed to prevent leakage of radio waves, improve heat generation efficiency, and ensure the strength of the mortar. This wire mesh corresponds to a radio wave shielding material.
  • the non-conductive film described in Patent Document 1 is a sheet without a single hole, the following problems occur when it is installed in a space and shields radio waves of a specific frequency. If this shield material is installed in the middle of one room and divided into two rooms, radio waves of a specific frequency are generated in one space and radio waves of a specific frequency in the other space are shielded, the air is also shielded at the same time. End up. Therefore, the airflow of the air conditioning equipment is also shielded, and there is a possibility that the temperature and the airflow cannot be properly controlled.
  • Non-Patent Document 1 since the wire mesh used in Non-Patent Document 1 is required to have a dense mesh at high frequencies, the cost becomes high and the workability when combined with mortar becomes low. Therefore, it is difficult to enhance the radio wave shielding effect. In addition, a specific frequency cannot be selectively shielded.
  • the inventor examined the installation of the radio wave shielding material described in Patent Document 1 in the mortar of the exothermic mortar block.
  • the mortar is partitioned by the nonconductive film, and the adhesiveness between the nonconductive film and the mortar is poor, so that the strength cannot be secured and the structure cannot be used.
  • structural materials other than mortar containing cement such as general concrete and cement paste, as well as mortar.
  • the cement here may be Boldland cement or other cement.
  • structural materials such as asphalt as well as structural materials including cement.
  • An object of the present invention is to provide a radio wave shielding material that exhibits a remarkable radio wave shielding effect with respect to a specific frequency as described above, and allows air to pass through in the air and to increase the strength of the structural material within the structural material. To do.
  • This invention is providing the electromagnetic wave shielding material and mortar which solve said subject, and are as follows.
  • Invention 1 is a radio wave shielding material in which a plurality of thin wires are arranged substantially parallel to the electric field direction at intervals and lengths corresponding to radio waves of a specific frequency, and the width of the thin wires connecting the thin wires. It is a radio wave shielding material characterized in that it has a connecting material that is equal to or narrow in width.
  • Invention 2 is a radio wave shielding material in which a plurality of thin wires are arranged substantially parallel to the electric field direction at intervals and lengths corresponding to radio waves of a specific frequency, and the widths of the thin wires are connected to each other. It is a radio wave shielding material characterized by having a non-conductive connecting material made smaller than the length of the thin wire.
  • Invention 3 is the radio wave shielding material according to Invention 1 or 2, wherein the connecting material is substantially perpendicular to the electric field direction.
  • Invention 4 is a radio wave shielding material characterized by having a second connecting material for connecting any one of the radio wave shielding materials described in inventions 1 to 3 substantially perpendicularly to the electric field direction.
  • Invention 5 is the radio wave shielding material according to Invention 4, wherein the second connecting material is non-conductive.
  • Invention 6 is a mortar material having any one of the radio wave shielding materials described in Inventions 1 to 5.
  • Invention 7 is a snow melting apparatus having a heat generating mortar block having any one of the radio wave shielding materials described in Inventions 1 to 5.
  • the invention 8 includes a plurality of radio wave shielding materials (2), and each of the plurality of radio wave shielding materials includes a plurality of fine wires (11) and a connecting material (13) for connecting the plurality of fine wires (11).
  • a plurality of fine wires included in one of the plurality of radio wave shielding materials, and a plurality of fine wires included in another radio wave shielding material of the plurality of radio wave shielding materials, Are not connected to each other, and a gap is provided between the plurality of radio wave shielding materials or between a plurality of thin wires included in one radio wave shielding material among the plurality of radio wave shielding materials.
  • It is a radio wave shield body characterized by being.
  • Invention 9 comprises a plurality of radio wave shielding materials (2) and a structure material (21) in which the plurality of radio wave shielding materials are installed and absorbs radio waves and generates heat, and the plurality of radio wave shielding materials.
  • Each includes a plurality of fine wires (11) and a connecting member (13) for connecting the plurality of thin wires (11), and is included in one of the plurality of radio wave shield materials.
  • the plurality of thin wires are not electrically connected to the plurality of thin wires included in the other radio wave shield material among the plurality of radio wave shield materials, or between the plurality of radio wave shield materials, or A hole is provided between a plurality of thin wires included in one radio wave shielding material among the plurality of radio wave shielding materials, and from one side of the plurality of radio wave shielding materials 2 to the other side, Structure characterized by penetration of structural material It is.
  • the conductive thin wires are easily installed by using the radio wave shield material of the invention 1 arranged so as to shield the specific frequency and fixed with a connecting material. It can be done and the construction becomes easy. Moreover, when it installs in space, the passage of air is enabled and it can avoid impairing an air-conditioning effect.
  • the strength of the mortar is unlikely to decrease because the mortar hardens through the space of the radio wave shielding material, and can be used as a structure.
  • the radio wave shield body of 1st Embodiment installed in the surface substantially orthogonal to the electric field surface of the electromagnetic wave from an antenna is shown. It is a top view of the electromagnetic wave shield of a 1st embodiment. It is a front view of the electromagnetic wave shield of a 1st embodiment. It is a figure which shows the width
  • FIG. 1 shows a radio wave shield 1 including a plurality of radio wave shield members 2 installed on a surface 37 substantially orthogonal to an electric field surface 35 of radio waves from an antenna 31.
  • the electric field surface 35 is a surface including the electric field direction 33 of the radio wave radiated from the antenna 31 and the propagation direction of the radio wave.
  • Substantially orthogonal means that an error of ⁇ 15 ° with respect to strict orthogonality is allowed.
  • the surface 37 may not be a plane.
  • a structural material that generates heat by absorbing radio waves such as concrete, mortar, asphalt, glass, resin plate, cloth, paper, etc. May be used.
  • Each of the radio wave shielding materials 2 includes a plurality of thin wires 11 disposed substantially parallel to the electric field direction 33 and one or more connecting members 13 disposed substantially orthogonal to the electric field direction 33.
  • Substantially parallel means to allow an error of ⁇ 15 ° with respect to strict parallelism.
  • the plurality of thin wires 11 in the plurality of radio wave shielding materials 2 are arranged substantially in parallel to the electric field direction 33 at intervals and lengths corresponding to radio waves of a specific frequency. ing.
  • each of the connecting members 13 in the radio wave shield material 2 connects the thin wires 11 in the radio wave shield material 2.
  • the width 13d of each of the connecting members 13 is equal to or narrower than the width 11d of the thin wire 11 in the same radio wave shielding material 2.
  • Each of the radio wave shield members 2 may have one connecting member 13 or two or more connecting members 13.
  • the width of the connecting material 13 is the length in the direction orthogonal to the longitudinal direction of the connecting material 13.
  • the width 11 d of the fine line is a length in a direction orthogonal to the longitudinal direction of the fine line 11.
  • the plurality of thin wires 11 in the plurality of radio wave shielding materials 2 are arranged substantially in parallel with the electric field direction 33 at intervals and lengths corresponding to radio waves of a specific frequency. ing.
  • each of the connecting members 13 in the radio wave shield material 2 is non-conductive and connects the thin wires 11 in the radio wave shield material 2.
  • Each connecting member 13 has a width 13 d shorter than the length of the thin wire 11 in the same radio wave shield material 2 in the longitudinal direction.
  • each of the connecting members 13 may be any width as long as it is smaller than the length of the thin wire 11 in the same radio wave shielding material 2, but it is more preferable to make it smaller than half or half the length of the thin wire 11. Is preferred.
  • each connecting member 13 is substantially perpendicular to the electric field direction 33.
  • the connecting member 13 that connects the thin wires 11 so as to have a space between two adjacent thin wires 11 in the same radio wave shielding material 2 a specific frequency can be obtained. It is possible to provide the radio wave shield 1 that exhibits only the radio wave shielding effect. Thereby, when the radio wave shield body 1 is installed in a space, it is possible to allow air to pass therethrough so as not to impair the air conditioning effect.
  • the structural material is hardened through the gaps of the radio wave shield 1, so that the strength as the structural material is unlikely to decrease and can be used as a structure.
  • a plurality of radio wave shielding materials 2 can be arranged in a surface state in the structural material, labor for arranging the radio wave shielding material 2 is reduced.
  • the radio wave shielding effect of the radio wave shield 1 is obtained because the longitudinal direction of the connecting member 13 is substantially perpendicular to the electric field direction 33. It is difficult for the connecting member 13 to affect.
  • FIG. 2A, 2B, and 2C show the radio wave shield 1 of the first embodiment.
  • 2A is a plan view of the radio wave shield 1
  • FIG. 2B is a front view of the radio wave shield 1
  • FIG. 2C is a diagram showing the width of the thin wire 11 and the connecting member 13.
  • the ladder-shaped radio wave shielding material 2 constituted by the thin wire 11 and the connecting material 13 will be described.
  • a plurality of conductive thin wires 11 having the same length L are arranged at an equal interval M, and two ends at both longitudinal ends of the thin wire 11 are two.
  • the connecting member 13 is fixed.
  • the thin wire 11 has a conductive material, for example, iron, stainless steel, copper, copper alloy, or the like. Iron may be surface-treated such as by processing the surface with a fluororesin.
  • Each of the thin wires 11 may be a bar-shaped material as well as a bendable shape such as a wire, a wire, a string, and a thread, and is manufactured by cutting a length L. The same applies to other embodiments.
  • the connecting material 13 is made of a conductive material or a non-conductive material.
  • it is composed of iron, stainless steel, copper, copper alloy, resin, cotton, wool or the like. Iron may be surface-treated such as by processing the surface with a fluororesin.
  • Each of the connecting members 13 may be a rod-shaped member in addition to a bendable shape such as a wire, a wire, a string, and a thread. The same applies to other embodiments.
  • the joining method of the thin wire 11 and the connecting member 13 may be a method of mechanically joining the connecting member 13 around the thin wire 11 or a method of joining using welding or an adhesive. Further, when the same material is used for the thin wire 11 and the connecting material 13, the thin wire 11 and the connecting material 13 may be integrally formed by cutting out a plate-like material.
  • Each radio wave shield member 2 has two, three, or four or more connecting members 13, and these connecting members 13 connect a plurality of thin wires 11 in the same radio wave shield member 2. (See FIG. 9B).
  • each radio wave shield member 2 a rectangular gap sandwiched between adjacent connecting members 13 is formed between adjacent thin wires 11. These gaps penetrate from the one surface side of the radio wave shielding material 2 to the other surface side. In addition, a gap is formed between adjacent radio wave shielding materials 2. These voids penetrate from the one surface side of the radio wave shield 1 to the other surface side.
  • the radio wave shield 1 when the radio wave shield 1 is disposed in the space, the air around the radio wave shield material 2 can pass through these gaps.
  • the structural material on one side of the radio wave shielding material 2 is connected to the structural material on the other side through these gaps. be able to.
  • a plurality of radio wave shield materials 2 are installed on a surface 37 that is substantially parallel to each other and substantially perpendicular to the electric field surface 35 with an interval of a defect length N (see FIG. 2B).
  • the interval N is from one longitudinal end of each thin wire 11 in each radio wave shielding material 2 to the other longitudinal end of the thin wire 11 closest to the thin wire 11 in the adjacent radio shielding material 2. Is the interval.
  • the interval N is an interval in a direction parallel to the electric field direction 33 and is also an interval in the longitudinal direction of the thin wire 11.
  • FIG. 2C shows the width 11 d of the thin wire 11 and the width 13 d of the connecting member 13.
  • the width 13d is equal to or smaller than the width 11d.
  • the term “equivalent” refers to about 3 times to about 1/3 of the width 11d, and is most preferably substantially the same.
  • FIG. 3A and 3B show the amount of radio wave shielding with respect to the frequency of radio waves in the air having the length L in the longitudinal direction of the fine wires 11, the interval M between the fine wires 11, and the length N of the defect.
  • FIG. 3A shows the effect of spacing M
  • FIG. 3B shows the effect of defect length N.
  • the interval M is an interval between each thin wire 11 in each radio wave shield material 2 and the adjacent thin wire 11 in the same radio wave shield material 2.
  • the interval M is an interval in a direction orthogonal to the electric field surface 35 and an interval in a direction orthogonal to the longitudinal direction of the thin wire 11.
  • the length L of the thin wire 11 By shortening the length L of the thin wire 11, higher frequency radio waves can be reflected, and by increasing the length L of the thin wire 11, lower frequency radio waves can be reflected. Further, by narrowing the interval M between the thin wires 11, higher frequency radio waves can be reflected, and by increasing the interval M between the thin wires 11, lower frequency radio waves can be reflected. Therefore, an arbitrary radio wave can be selectively reflected by adjusting the length L of the thin wire 11 and the interval M between the thin wires 11.
  • the length L of the fine wires 11 should be 60 mm, and the interval M between the fine wires 11 should be 35 mm, and the radio waves of 2.45 GHz are reflected in the mortar 21 made of ordinary Portland cement. In this case, it is preferable that the length L of the thin wires 11 is 60 mm and the distance M between the thin wires 11 is 10 mm.
  • the length N of the defect needs to be narrowed according to the frequency of the reflected radio wave. For example, when reflecting 2.45 GHz radio wave in the air, 35 mm or less is desirable and 10 mm is the best.
  • the relationship between the frequency in the radio wave shield 1 and the radio wave shielding amount of the frequency is called the frequency characteristic of the radio wave shielding amount.
  • the peak frequency of this frequency characteristic is fa
  • the inductance of the radio wave shield body 1 is La
  • the inductance of the radio wave shield body 1 is Ca
  • the peak frequency is the frequency at which the amount of radio wave shielding is maximized.
  • Ls is expressed by the following formula (3).
  • the cross section obtained by cutting the fine wire 11 perpendicularly to the longitudinal direction may be a polygon such as a rectangle or a square, and is not necessarily a circle, but here a case of a circle will be described.
  • Lm is expressed by the following formula (4).
  • FIG. 7 shows a flowchart of selection of the length L of the thin wires 11, the interval M between the thin wires 11 and the length N of the defect with respect to the frequency to be shielded.
  • a peak frequency to be shielded is selected.
  • it is assumed to be 2.45 GHz.
  • the length L of the thin wire 11, the interval M between the thin wires 11, and the length N of the defect, which are the specifications of the radio wave shield 1 are selected.
  • the length L of the thin wires 11 is 63.5 mm
  • the distance M between the thin wires 11 is 6.35 mm
  • the length N of the defect is 6.35 mm.
  • step 105 it is determined whether or not the length N of the defect is within an allowable value. If it is not an allowable value, the selection is performed again at step 103. In the case of the allowable value, the specification of the specification of the radio wave shield body 1 is determined.
  • the non-conductive film in which the fine wire 11 is conventionally arranged is affixed to glass, it is an organic material having transparency. Since such a conventional radio wave shield is exposed to the outdoors, deterioration due to ultraviolet rays is inevitable. Due to this deterioration, the efficiency of radio wave shielding by the radio wave shield body is reduced, so that labor and cost such as periodic replacement are required.
  • FIG. 8A, 8B, and 8C show the radio wave shield 1 of the second embodiment.
  • 8A is a plan view
  • FIG. 8B is a front view
  • FIG. 8C shows the width of the thin wire 11 and the connecting member 15.
  • the radio wave shielding material 2 having a shape composed of the thin wire 11 and the connecting material 15 having a large width will be described.
  • a plurality of conductive thin wires 11 having the same length L are arranged at equal intervals M.
  • one central portion of the plurality of thin wires 11 is fixed by one connecting member 15 having a large width.
  • the connecting material 13 uses a non-conductive material.
  • a method for joining the thin wire 11 and the connecting material 15 a method of joining the connecting material 15 and the thin wire 11 with an adhesive may be adopted, or a cut is made in the connecting material 15 to pass through the thin wire 11, as if You may employ
  • the position where the connecting member 15 is joined to the thin wire 11 may not be the longitudinal center of the thin wire 11, and may be a position offset to either of the longitudinal ends of the thin wire 11.
  • a plurality of radio wave shield materials 2 are installed on a surface 37 that is substantially parallel to the electric field surface 35 and is substantially parallel to each other with an interval of the length N of the defect.
  • the radio wave enters the radio wave shield 1 as shown in the plan view of FIG. 8A.
  • FIG. 8C shows the width 11 d of the thin wire 11 and the width 15 d of the connecting material 15.
  • the width 15 d of the connecting material 15 is smaller than the length L of the thin wire 11.
  • the width 15d may be smaller than the length L of the thin wire 11, but is more preferably the same width as half the length L of the thin wire 11 or smaller than half the length L of the thin wire 11. is there.
  • each radio wave shield member 2 a gap is formed between adjacent thin wires 11. These gaps penetrate from the one surface side of the radio wave shielding material 2 to the other surface side. In addition, a gap is formed between adjacent radio wave shielding materials 2. These voids penetrate from the one surface side of the radio wave shield 1 to the other surface side.
  • the radio wave shield 1 when the radio wave shield 1 is disposed in the space, the air around the radio wave shield material 2 can pass through these gaps.
  • the structural material on one side of the radio wave shielding material 2 is connected to the structural material on the other side through these gaps. be able to.
  • FIG. 9A and 9B show the radio wave shield 1 of the third embodiment.
  • 9A is a plan view and FIG. 9B is a front view.
  • the radio wave shield body 1 has a plurality of radio wave shield materials.
  • Each of these radio wave shielding materials has a ladder shape composed of a thin wire 11 and a connecting material 13 as shown in FIG. 9B.
  • a plurality of conductive thin wires 11 having the same length L are arranged at equal intervals M, and a plurality of longitudinal ends of the thin wires 11 are fixed by a plurality of connecting members 13. Is done.
  • the connecting member 13 is made of a conductive material or a non-conductive material.
  • line 11 and the connection material 13 is the same as that of 1st Embodiment.
  • the connecting material 13 may be wound around the thin wire 11 and mechanically joined, or may be joined using welding or an adhesive. Further, when the same material is used for the thin wire 11 and the connecting material 13, the thin wire 11 and the connecting material 13 may be integrally formed by cutting out a plate-like material.
  • a plurality of radio wave shield materials 2 are installed on a surface 37 that is substantially parallel to the electric field surface 35 with an interval of the length N of the defect.
  • the adjacent radio wave shielding material 2 is joined by the strip-shaped second connecting material 17.
  • the 2nd connection material 17 may not be strip shape, for example, may be linear.
  • the thin wires 11 of the adjacent radio wave shielding materials 2 are joined to each other by the second connecting material 17 at a pitch of one in five.
  • the second connecting member 17 may be made of a non-conductive material, but may be made of a conductive material.
  • the joining pitch of the second connecting members 17 may not be one pitch per five of the thin wires 11, or two or more may be joined together with the second connecting member 17. However, when the radio wave shield 1 is hung in the space and arranged in the mortar 21, the joining pitch of the second connecting members 17 is set so that the gap of the length N of the defect can be maintained. Selected.
  • a conductive material for the second connecting member 17
  • a non-conductive material it is necessary to examine the influence on radio wave shielding and select the pitch of the thin wires 11 to be joined, or to use it at a site where the radio wave shielding effect is not expected.
  • a method of joining with an adhesive may be adopted, but when a method using a conductive material is adopted, a method such as welding can be used. . Further, when the same material is used for the thin wire 11 and the connecting material 13, the thin wire 11 and the connecting material 13 may be integrally formed by cutting out a plate-like material.
  • one second connecting member 17 and a plurality of thin wires 11 may be joined. Further, the second connecting member 17 and a part of the connecting member 13 may be joined.
  • the connecting material 13 may be the same as that shown in FIGS. 2A, 2B, and 2C, or may be the same as the connecting material 15 shown in FIGS. 8A, 8B, and 8C.
  • the radio wave enters the radio wave shield 1 as shown in the plan view of FIG. 9A.
  • one or a plurality of second connecting members 17 are arranged so that the plurality of radio wave shielding members 2 of the first, second, and third viewpoints are in the electric field direction 33. Connect in parallel.
  • the 2nd connection material 17 is nonelectroconductive.
  • the radio wave shield 1 in the radio wave shield 1, the plurality of radio wave shield materials 2 are connected to each other by the second connecting material 17. Therefore, the radio wave shield 1 can be installed as a large surface at an arbitrary location, so that the workability of the apparatus having the radio wave shield 1 can be improved.
  • the number of connecting members 13 may be two or more, a wire mesh having a square mesh having a length M (that is, a gap) can be used as the radio wave shield 1.
  • the radio wave shield body 1 having a plurality of radio wave shield materials 2 may be created.
  • the interval N is set to 6.35 mm, for example.
  • the radio wave shield 1 made in this way is called a defective wire mesh.
  • a plurality of radio wave shield materials 2 in which the thin wire 11 and the connecting material 13 are integrated may be manufactured by punching a thin metal plate like a punching metal into a wire mesh shape. Or you may manufacture the electromagnetic wave shield 1 which the thin wire
  • each radio wave shield member 2 a gap is formed between adjacent thin wires 11. These gaps penetrate from the one surface side of the radio wave shielding material 2 to the other surface side. In addition, a gap is formed between adjacent radio wave shielding materials 2. These voids penetrate from the one surface side of the radio wave shield 1 to the other surface side.
  • the radio wave shield 1 when the radio wave shield 1 is disposed in the space, the air around the radio wave shield material 2 can pass through these gaps.
  • the structural material on one side of the radio wave shielding material 2 is connected to the structural material on the other side through these gaps. be able to.
  • FIG. 11A and 11B show a mortar radio wave shield device 3 in which a radio wave shield 1 is installed in a mortar 21 according to a fourth embodiment.
  • FIG. 11A is a plan view of an example in which the radio wave shield 1 is installed in the mortar 21, and FIG. 11B is a front view.
  • each of the plurality of radio wave shielding materials 2 included in the radio wave shield body 1 has a ladder shape including a plurality of sub-thin wires 11 and a plurality of connecting members 13.
  • a plurality of conductive thin wires 11 having the same length L are arranged at equal intervals M.
  • a plurality of portions at both ends in the longitudinal direction of the thin wires 11 are fixed by a plurality of connecting members 13.
  • the connecting material 13 is made of a conductive material or a non-conductive material.
  • the joining method of the thin wire 11 and the connecting material 13 is the same as that of the first embodiment.
  • a method of winding the connecting material 13 around the thin wire 11 and mechanically joining may be employed, or welding or an adhesive may be used. You may employ
  • the thin wire 11 and the connecting material 13 may be integrally formed by cutting out a plate-like material.
  • the connection material 13 of 2nd Embodiment and its joining method can also be used.
  • the radio wave shield 1 of the present embodiment those of the first and second embodiments may be used.
  • the defective wire mesh of the third embodiment may be used.
  • the radio wave is incident on the radio wave shield 1 as shown in the plan view of FIG. 11A. Therefore, when the wall of the building is constituted by the mortar 21, it is possible to shield radio waves having a specific frequency.
  • the length L of the fine wires 11 in the mortar 21 is shorter, and the interval M between the fine wires 11 and the length N of the defect are preferably narrower. It is considered that the dielectric constant of the mortar 21 is higher than that of air, and the wavelength of the radio wave existing in the mortar 21 is shorter than the wavelength of the radio wave existing in the air.
  • the mortar 21 has the radio wave shield 1 according to the first to fifth aspects.
  • FIG. 12 shows the frequency of the defective wire mesh when the defective wire mesh described in the third embodiment is sandwiched between two normal bolt land cement mortars having a length of 300 mm, a width of 300 mm, and a thickness of 10 mm. Indicates the amount of radio wave shielding.
  • FIG. 12 shows, as a comparative example, the amount of radio wave shielding with respect to the frequency of the wire mesh when a conventional wire mesh is sandwiched between the two ordinary bolt land cement mortars.
  • the horizontal axis represents frequency
  • the vertical axis represents radio wave shielding amount (dB).
  • the characteristic of a conventional wire mesh is represented by “diamond symbol + solid line”, and the characteristic of a missing wire mesh is represented by “square symbol + dashed line”.
  • the amount of radio wave shielding (dB) at the target frequency of 2.45 GHz is greatly improved to about 30 dB for the defective wire mesh as compared to about 7 dB for the conventional wire mesh.
  • FIG. 13 shows, with circles and solid lines, the amount of radio wave shielding with respect to the frequency of the missing wire mesh when the missing wire mesh of the third embodiment is embedded in the center of the mortar 21.
  • FIG. 13 shows, as a comparative example, the amount of radio wave shielding with respect to the frequency of the wire mesh when the conventional wire mesh is embedded in the center portion of the mortar 21 with square marks and solid lines.
  • FIG. 13 shows, as a comparative example, the amount of radio wave shielding with respect to the frequency of the wire mesh when the radio wave shield is not embedded in the mortar 21 with rhombuses and solid lines.
  • N 20 mm.
  • the mortar 21 containing the defective wire mesh has the largest amount of radio wave shielding.
  • each radio wave shield member 2 a hole is formed between adjacent thin wires 11.
  • the mortar 21 penetrates from the one surface side of the radio wave shielding material 2 to the other surface side.
  • a hole is formed between the adjacent radio wave shielding materials 2.
  • the mortar 21 penetrates from one side of the radio wave shield 1 to the other side. That is, the mortar on the one surface side of the radio wave shield 1 and the mortar on the other surface side are coupled through these holes. Therefore, the intensity
  • FIG. 15 shows the current state of snow melting in a snowfall area.
  • the public road X1 has snow removal measures taken by the local government or a snow melting device is installed.
  • inhabitants have to do X2 in the private site of private property, especially when the path to the house and the public road is long, which is a heavy burden on the inhabitants.
  • a means for melting snow there are spraying of a snow melting agent, snow melting using a heating wire or ground water.
  • snow melting agents cause salt damage to concrete and plants and corrosion to steel frames.
  • a snow melting device using a heating wire has problems such as disconnection and electric leakage, maintainability, power consumption, and slow start-up.
  • Melting snow due to groundwater has problems such as ground deterioration and soiling of road surfaces due to minerals contained in groundwater.
  • Non-Patent Document 1 describes a snow melting device using a radio wave oscillator 41 and a heat generating mortar block 45 corresponding to snow melting in a snowfall region.
  • a wire mesh is installed near the surface of the heat generating mortar block to prevent leakage of radio waves, improve heat generation efficiency, and ensure the strength of the mortar.
  • the wire mesh is required to have a dense mesh when the wire mesh has a high frequency, so that there is a problem that the cost becomes high and the workability when combined with mortar is lowered. Therefore, it is difficult to enhance the radio wave shielding effect.
  • FIG. 12 it is not possible to shield only a specific frequency.
  • FIG. 14A and 14B show the snow melting device 5 in which the radio wave shield 1 is embedded in the heat melting mortar block 45 for snow melting of the fifth embodiment.
  • FIG. 14A shows the snow melting device 5.
  • the radio wave generated by the radio wave oscillator 41 is guided to the waveguide 43.
  • a slit 44 is provided on the upper surface of the waveguide 43 and is guided to a heat generating mortar block 45 disposed on the upper portion of the waveguide 43.
  • FIG. 14B shows the configuration of the exothermic mortar block 45.
  • the radio wave shield 1 is disposed on the heating element 47.
  • the heating element 47 absorbs the radio wave guided from the slit 44 of the waveguide 43 and converts it into heat.
  • the heating element 47 is made of carbon, ferrite (Fe 3 O 4 ), or the like.
  • the radio wave shield 1 shields the radio wave that has passed through the heating element 47 without being converted into heat. The reflected radio wave is again absorbed by the heating element 47 and converted into heat.
  • the heat generating body 47 and the radio wave shielding body 1 are preferably installed in the vicinity of the ground surface. This is because the generated heat is easily transmitted to the ground surface and contributes to melting snow.
  • the snow melting device 5 has the heat generating mortar block 45 on which the radio wave shield 1 according to the first to fifth aspects is installed.
  • none of the two thin wires 11 belonging to different radio wave shielding materials 2 are electrically connected to each other, but some of the thin wires 11 belong to different radio wave shielding materials 2 and They may be electrically connected to each other.
  • fine lines other than some of the fine lines 11 realize a radio wave shielding effect having specific frequency selectivity as described above.
  • the thin wires 11 belong to different radio wave shielding materials 2 and are electrically connected to each other, if attention is paid to the thin wires 11 that contribute to the radio wave shielding effect having specific frequency selectivity, The two thin wires 11 of any combination included in the different radio wave shielding materials 2 are not electrically connected.
  • the “plural thin lines” specified in the claims are such thin lines 11 that contribute to the radio wave shielding effect having specific frequency selectivity.
  • the present invention is to provide a radio wave shield 1 that exhibits a radio wave shielding effect only for a specific frequency by using a connecting member 13 that connects the thin wires 11 so as to have a space between the thin wires 11.
  • a connecting member 13 that connects the thin wires 11 so as to have a space between the thin wires 11.
  • the radio wave of the snow melting device 5 on the heating element 47, it is possible to prevent leakage of electromagnetic waves and increase the efficiency of snow melting by being able to generate heat near the ground surface.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Pest Control & Pesticides (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Building Environments (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Road Paving Structures (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)

Abstract

L'invention concerne une structure comprenant : une pluralité de matériaux de blindage contre les ondes radio (2) ; et un mortier (21) dans lequel sont disposés la pluralité de matériaux de blindage contre les ondes radio (2), ledit mortier absorbant les ondes radio et générant de la chaleur. Chacun de la pluralité de matériaux de blindage contre les ondes radio comprend une pluralité de fils fins (11) et un matériau de connexion (13) qui relie cette pluralité de fils fins (11). La pluralité de fils fins (11) inclus dans un matériau de blindage contre les ondes radio (2) ne sont pas reliés électriquement à la pluralité de fils fins (11) inclus dans d'autres matériaux de blindage contre les ondes radio (2). Des trous sont réalisés entre la pluralité de matériaux de blindage contre les ondes radio (2) ou entre la pluralité de fils fins (11) inclus dans l'un des matériaux de blindage contre les ondes radio (2) parmi la pluralité de matériaux de blindage contre les ondes radio (2). Le mortier (21) pénètre depuis un côté de la surface de la pluralité de matériaux de blindage contre les ondes radio (2) vers l'autre côté de la surface.
PCT/JP2017/000191 2016-01-28 2017-01-06 Matériau de blindage contre les ondes radio, mortier, dispositif de fusion de neige, blindage contre les ondes radio, et structure WO2017130652A1 (fr)

Priority Applications (1)

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JP2017563761A JP7072214B2 (ja) 2016-01-28 2017-01-06 電波シールド材、モルタル、融雪装置、電波シールド体、および構造物

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JP2016-013884 2016-01-28
JP2016013884 2016-01-28

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WO2017130652A1 true WO2017130652A1 (fr) 2017-08-03

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1037345A (ja) * 1996-07-25 1998-02-10 Fuji Elelctrochem Co Ltd コンクリート構造体
JP2004079762A (ja) * 2002-08-19 2004-03-11 Japan Science & Technology Corp 電波遮蔽材料
JP2009097160A (ja) * 2007-10-15 2009-05-07 Takumi:Kk マイクロ波による構造体加熱システム、マイクロ波発振導波装置及びマイクロ波発振器冷却方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0682944B2 (ja) * 1987-01-12 1994-10-19 東急建設株式会社 建物の躯体に於ける電磁波遮蔽構造
US5033082A (en) 1989-07-31 1991-07-16 Nelson Industries, Inc. Communication system with active noise cancellation
JPH11218339A (ja) * 1998-02-02 1999-08-10 Mitsubishi Chemical Corp 暖房システム
JP4259078B2 (ja) 2002-09-25 2009-04-30 凸版印刷株式会社 建材
JP5802501B2 (ja) * 2011-09-27 2015-10-28 東急建設株式会社 仕切体

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1037345A (ja) * 1996-07-25 1998-02-10 Fuji Elelctrochem Co Ltd コンクリート構造体
JP2004079762A (ja) * 2002-08-19 2004-03-11 Japan Science & Technology Corp 電波遮蔽材料
JP2009097160A (ja) * 2007-10-15 2009-05-07 Takumi:Kk マイクロ波による構造体加熱システム、マイクロ波発振導波装置及びマイクロ波発振器冷却方法

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JP7072214B2 (ja) 2022-05-20

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