WO2021235042A1 - Radome structure for on-board radar device - Google Patents

Radome structure for on-board radar device Download PDF

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Publication number
WO2021235042A1
WO2021235042A1 PCT/JP2021/008175 JP2021008175W WO2021235042A1 WO 2021235042 A1 WO2021235042 A1 WO 2021235042A1 JP 2021008175 W JP2021008175 W JP 2021008175W WO 2021235042 A1 WO2021235042 A1 WO 2021235042A1
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WO
WIPO (PCT)
Prior art keywords
wireless power
power receiving
unit
electromagnetic wave
radar device
Prior art date
Application number
PCT/JP2021/008175
Other languages
French (fr)
Japanese (ja)
Inventor
古林宏之
池増竜帆
山本真平
Original Assignee
三恵技研工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三恵技研工業株式会社 filed Critical 三恵技研工業株式会社
Publication of WO2021235042A1 publication Critical patent/WO2021235042A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling

Definitions

  • the present invention relates to a radome for an in-vehicle radar device provided on the front side of the in-vehicle radar device, and particularly relates to a radome structure for an in-vehicle radar device having a snow melting function.
  • a radome for an in-vehicle radar device a radome that exhibits a snow melting function while ensuring the necessary electromagnetic wave transmission is known.
  • a transparent member, a decorative layer, a front base material, a resin sheet constituting a heater portion, a linear heating element and its electrodes, and a rear base material are arranged in order from the front, and linear heat generation is performed.
  • the radomes of Patent Documents 1 and 2 in which the waterproof connector connected to both electrodes of the body is exposed behind the rear base material, and the vehicle side connector is coupled to this waterproof connector from the rear side to supply power to the heater portion. be.
  • Patent Document 3 has a plurality of installation mechanisms that are attached to a plurality of parts in the inclined chamber of the vehicle and that hold and fix the heater portion detachably, and the installation mechanism side has a wireless transmitter and a heater for wireless power supply.
  • a wireless transmitter for wireless power supply is provided on the unit side, and a heater device that wirelessly supplies power to the heater unit from the installation mechanism is disclosed.
  • a waterproof connector having a waterproof structure on the heater portion side exposed behind the rear base material is mechanically and electrically coupled to the vehicle side connector to supply power.
  • this structure alone is not sufficient to ensure the required waterproofness when the vehicle is washed or when it rains. That is, in order to actually mount this structure on the vehicle and secure the required waterproofness, in addition to making the connector on the heater part a waterproof structure, another connection point between the connector on the heater part and the connector on the vehicle side is provided. It is necessary to apply waterproof treatment using a waterproof member.
  • waterproofing is performed using another waterproofing member in this way, the number of parts will increase due to the addition of a waterproofing member that waterproofs the joint between the heater side connector of the radome and the vehicle side connector, and the manufacturing cost will increase. Further, by waterproofing the joint portion between the heater side connector of the radome and the vehicle side connector, the number of steps is increased and the manufacturing efficiency is lowered. Furthermore, the waterproof treatment for the joint between the heater side connector and the vehicle side connector exposed behind the rear base material of the radome is subject to space restrictions and space restrictions due to peripheral members such as the adherend to which the radome is attached. There is also a problem that it is easy and the cases where waterproof treatment can be performed to ensure the required waterproofness are limited.
  • the present invention has been proposed in view of the above problems, and is required to have waterproofness for vehicle washing, rainy weather, etc., while eliminating waterproofing treatment for mechanical and electrical joints between the heater side connector of the radome and the vehicle side connector. It is possible to provide a radome structure for an in-vehicle radar device that can secure the above, reduce the manufacturing cost, improve the manufacturing efficiency, and increase the degree of freedom in arranging the power supply parts with respect to the heater part. The purpose.
  • the radome structure for an in-vehicle radar device of the present invention is provided with a heater unit and a wireless power receiving unit that supplies electric power to the heater unit embedded in an electromagnetic wave transmitting resin body constituting the radar, and the wireless power transmission unit is the wireless power receiving unit. It is characterized in that the wireless power transmission unit is arranged so as to face each other apart from the above, and the wireless power transmission unit is sealed in a resin encapsulation body. According to this, the wireless power transmission unit embedded in the electromagnetic wave transmissive resin body constituting the redome can be wirelessly supplied with power by the resin-sealed wireless power transmission unit to supply power to the heater unit. Therefore, the heater of the redome can be supplied with electric power.
  • the wireless power transmission unit separated from the radome is sealed in the resin encapsulation body, so that the required waterproofness is achieved when the vehicle is washed or in the rain. It can be surely secured.
  • the wireless power transmission unit and the wireless power receiving unit are arranged so as to be separated from each other within a range in which the required wireless power supply can be performed, they can be freely arranged, so that the degree of freedom in arranging the power supply parts with respect to the heater unit can be increased.
  • the heater side connector of the radome and the vehicle side connector are mechanically and electrically connected, there is a risk of connection, mechanical fatigue of the joint, and disconnection. It is possible to eliminate the risk of physical fatigue and disconnection.
  • both the wireless power receiving unit and the wireless power transmission unit are arranged outside the electromagnetic wave irradiation area of the in-vehicle radar device, and the heater unit is located at a position substantially corresponding to the electromagnetic wave irradiation area. It is characterized by being provided. According to this, it is possible to prevent the wireless power receiving unit and the wireless power transmission unit from reducing the electromagnetic wave transmission of the in-vehicle radar device. In addition, snow and ice adhering to the outer surface of the radome can be reliably melted in the electromagnetic wave irradiation region of the in-vehicle radar device.
  • the wireless power receiving unit and the wireless power transmitting unit are the wireless power receiving unit and the wireless power transmitting unit in which the wireless power transmission unit is an electromagnetic induction type wireless power supply, and the axial direction of the power receiving coil of the wireless power receiving unit.
  • the wireless power transfer unit and the wireless power transfer unit are arranged so that the axial directions of the transmission coils of the wireless power transfer unit are substantially orthogonal to the heater unit. According to this, the electric power required for snowmelt can be efficiently supplied to the heater unit by the electromagnetic induction type wireless power supply, and the heater unit can be efficiently heated with power saving.
  • the millimeter wave which is the electromagnetic wave of the radar of the in-vehicle radar device
  • the electromagnetic wave used in the electromagnetic induction type wireless power supply usually have a large difference in frequency, they do not interfere with the millimeter wave, and the function of the in-vehicle radar device should be exhibited well. Can be done.
  • both the wireless power receiving unit and the wireless power transmitting unit of the electromagnetic induction type wireless power supply are arranged outside the electromagnetic wave irradiation region of the in-vehicle radar device, and the power receiving unit is received.
  • the coil is provided so as to surround the electromagnetic wave irradiation region outside the electromagnetic wave irradiation region of the resin body, and the transmission coil of the wireless transmission unit is arranged so as to be separated from the power receiving coil. According to this, it is possible to prevent the wireless power receiving unit and the wireless power transmission unit from reducing the electromagnetic wave transmission of the in-vehicle radar device.
  • the winding diameters of the power receiving coil and the power transmitting coil can be made large in diameter so as to surround the electromagnetic wave irradiation region from the outside, so that the electric power required for snow melting of the heater portion can be reliably supplied. Further, it is possible to effectively utilize the space outside the electromagnetic wave irradiation area to install the power receiving coil and the corresponding power transmission coil. For example, a radome shape in which the resin body locally greatly protrudes to the outside of the electromagnetic wave irradiation area. It is possible to prevent the radome from becoming, and it is possible to secure the aesthetic appearance of the appearance shape of the radome.
  • both the wireless power receiving unit and the wireless power transmitting unit of the electromagnetic induction type wireless power supply are arranged outside the electromagnetic wave irradiation region of the in-vehicle radar device, and the wireless power receiving unit receives power.
  • the coil is provided so as to be wound in a plurality of regions outside the electromagnetic wave irradiation region of the resin body, and the transmission coil of the wireless power transmission unit is arranged so as to be separated from the power receiving coil and opposed to the power receiving coil. do. According to this, it is possible to prevent the wireless power receiving unit and the wireless power transmission unit from reducing the electromagnetic wave transmission of the in-vehicle radar device.
  • the power receiving coil is wound in a plurality of regions outside the electromagnetic wave irradiation region of the resin body, and the power receiving coil and the power transmission coil wound in the plurality of regions are arranged so as to face each other, so that the power receiving coil in each region can be obtained. Even if the winding diameter of the power transmission coil is reduced, the electric power required for melting snow in the heater portion can be reliably supplied. Further, since it is possible to reduce the winding diameters of the power receiving coil and the power transmitting coil in each region in a plurality of regions, for example, a power receiving coil having a large winding diameter is embedded and the resin body is locally large outside the electromagnetic wave irradiation region. It is possible to prevent the radome shape from protruding, and it is possible to ensure the aesthetic appearance of the radome.
  • both the wireless power receiving unit and the wireless power transmission unit of the electromagnetically guided wireless power supply are arranged outside the electromagnetic wave irradiation region of the in-vehicle radar device, and the electromagnetically guided wireless power supply is supplied. It is characterized in that a plurality of combinations of the wireless power receiving unit and the wireless power transmitting unit are installed. According to this, it is possible to prevent the wireless power receiving unit and the wireless power transmission unit from reducing the electromagnetic wave transmission of the in-vehicle radar device.
  • the power required for snow melting in the heater section can be obtained. It can be reliably supplied.
  • a power receiving coil having a large winding diameter is embedded so that the resin body locally protrudes greatly to the outside of the electromagnetic wave irradiation region. It is possible to prevent the radome from becoming a shape, and it is possible to secure the aesthetic appearance of the radome.
  • the radome structure for an in-vehicle radar device of the present invention is characterized in that an opening is formed at a position substantially corresponding to the electromagnetic wave irradiation region of the resin encapsulation body that encloses the wireless power transmission unit. According to this, the electromagnetic wave emitted from the in-vehicle radar device can be applied to the radome without passing through the inside of the resin encapsulation body, and the electromagnetic wave transmission of the in-vehicle radar device in the entire radome structure can be maximized. can.
  • the electromagnetic wave of the in-vehicle radar device does not pass through the inside of the resin encapsulation body, a material that is not restricted by the electromagnetic wave transmission of the in-vehicle radar device can be used for the resin encapsulation body, and is used for the resin encapsulation body.
  • the degree of freedom of possible materials can be increased.
  • the required waterproof property for vehicle washing, rainy weather, etc. while eliminating the waterproof treatment for the mechanical and electrical joints between the heater side connector and the vehicle side connector of the radome. It is possible to reduce the manufacturing cost and improve the manufacturing efficiency, and it is possible to increase the degree of freedom in arranging the power supply parts with respect to the heater unit.
  • AA enlarged end view of FIG. 1.
  • (A) is a block diagram of the wireless power receiving unit in the first embodiment
  • (b) is a block diagram of the wireless power transmission unit in the first embodiment.
  • (A) is a schematic front view showing a radome in a radome structure for an in-vehicle radar device of the first modification of the first embodiment
  • (b) is a schematic showing a resin encapsulation body containing a power transmission unit in the first modification. Front view.
  • (A) is a schematic front view showing a radome in a radome structure for an in-vehicle radar device of a second modification of the first embodiment
  • (b) is a schematic showing a resin encapsulation body containing a power transmission unit in the second modification. Front view.
  • the radome structure for an in-vehicle radar device includes, for example, a radome 1 as shown in FIGS. 1 and 2.
  • the radome 1 is provided by fixing the transparent and electromagnetic wave transmitting front base material 2, the decorative layer 3, the heater layer 4, and the electromagnetic wave transmitting rear base material 5 so as to be in close contact with each other in order from the surface side.
  • the front base material 2, the insulating base material 42 of the heater layer 4 described later, and the rear base material 5 constitute an electromagnetic wave transmitting resin body 10 that constitutes the radome 1.
  • the front base material 2 in the illustrated example has an elliptical shape that is close to a circle when viewed from the front, and the mark symbol portion M constituting the design portion can be visually recognized from the surface side through the transparent front base material 2.
  • R in FIG. 1 is an electromagnetic wave transmission region.
  • the radome structure for an in-vehicle radar device of the present embodiment can also be applied to a radome that does not have the mark symbol portion M such as an emblem.
  • the transparent front base material 2 and the rear base material 5 are insulating and have electromagnetic wave transmission.
  • the refractive index n defined based on the complex permittivity of the front base material 2 and the rear base material 5 are matched with each other, or the refractive indexes n are substantially the same or close to each other, for example, they are formed of the same material. Is suitable from the viewpoint of improving the transmission performance of electromagnetic waves.
  • the refractive index n here is a quantity defined as Equation 1 from the relative permittivity real part ⁇ r'and the relative permittivity imaginary part ⁇ r'. It is preferable that the size of the dielectric tangent tan ⁇ defined as 2 is 0.1 or less, and the size of the real part of the relative permittivity is 3 or less. By making the size of the real part smaller than these values, it is possible to ensure the reduction of the refractive index and the internal loss required for the redome.
  • the transparent front base material 2 is preferably a colorless material or a colored material having a visible light transmittance of 50% or more in order to ensure good visibility.
  • the material 2 is an insulating transparent synthetic resin
  • the material is appropriate to the extent applicable, and for example, an acrylic resin such as polycarbonate (PC) or polymethylmethacrylate (PMMA), or acrylonitrile-butadiene-styrene.
  • PC polycarbonate
  • PMMA polymethylmethacrylate
  • the back base material 5 is an insulating synthetic resin
  • the material is appropriate to the extent applicable, and for example, acrylics such as acrylonitrile-ethylenepropyl rubber-styrene copolymer (AES) and polymethylmethacrylate (PMMA).
  • acrylics such as acrylonitrile-ethylenepropyl rubber-styrene copolymer (AES) and polymethylmethacrylate (PMMA).
  • AES acrylonitrile-ethylenepropyl rubber-styrene copolymer
  • PMMA polymethylmethacrylate
  • PC polycarbonate
  • ABS acrylonitrile-butadiene-styrene copolymer
  • ASA acrylonitrile-styrene-acrylate copolymer
  • Additives may be contained.
  • a decorative layer 3 is provided in close contact with the back surface of the front base material 2, and the decorative layer 3 of the present embodiment is composed of an electromagnetic wave transmitting metal portion 31 and a colored portion 32.
  • the decorative layer 3 is appropriate within the scope of the present invention, and other than the decorative layer 3 composed of the electromagnetic wave transmitting metal portion 31 and the colored portion 32, for example, only the electromagnetic wave transmitting metal portion is used. It is possible to use a decorative layer composed of a colored portion, a decorative layer composed of only a colored portion, or the like.
  • the electromagnetic wave transmissive metal portion 31 is composed of, for example, a discontinuous metal layer that is electromagnetic wave transmissive and has a metallic luster, has brilliant and integrated visibility, and is electroless plated, vapor-deposited, or formed on the back surface of the front base material 2. It is formed by spatter or the like.
  • the electromagnetic wave transmitting metal portion 31 is a discontinuous metal layer having brilliant and integral visibility, for example, nickel or nickel alloy, chromium or chromium alloy, cobalt or cobalt alloy, tin or tin alloy, copper or copper alloy. , Silver or silver alloy, palladium or palladium alloy, platinum or platinum alloy, rhodium or rhodium alloy, gold or gold alloy and the like.
  • the colored portion 32 has electromagnetic wave transmission and is formed by printing or painting using a painting mask.
  • the colored portion 32 is provided in close contact with the back surface of the front base material 2 so as to be laminated on a part of the surface side of the electromagnetic wave transmitting metal portion 31.
  • the electromagnetic wave transmitting metal portion 31 is formed in a layer over the entire region where the back surface of the material 2 is exposed and the region where the colored portion 32 is provided, and the exposed back surface and the colored portion 32 of the front base material 2 are formed. It is provided in close contact with.
  • a recess 21 is formed on the back surface side of the front base material 2 at a position corresponding to the mark symbol portion M, and the decorative layer 3 partially protrudes toward the surface side in a cross-sectional view so as to imitate the recess 21. It is bent and formed.
  • the electromagnetic wave transmitting metal portion 31 of the decorative layer 3 is formed so as to partially project so as to imitate the concave portion 21, and the concave portion 21 is not provided with the colored portion 32, and only the electromagnetic wave transmitting metal portion 31 enters. It is provided.
  • the colored portion 32 of the illustrated example is provided in close contact with the back surface of the front base material 2 other than the recess 21.
  • the heater layer 4 is laminated and fixed to the back surface 33 side of the decorative layer 3, and the heater layer 4 is configured such that the heater portion 41 composed of the heater wire is fixed to the insulating base material 42 in this example.
  • the heater layer 4 and the heater portion 41 are formed at a portion corresponding to the recess 21 so as to partially project toward the surface side so as to follow the recess 21, and the projecting portion is formed so as to enter the recess 21 and the recess 21. It is arranged so as to be engaged with the decorative layer 3 formed in the shape.
  • the rear base material 5 is fixedly provided on the back surface of the insulating base material 42.
  • the heater portion 41 composed of the heater wire can be made of an appropriate conductive material such as nichrome wire, iron chromium, copper, silver, carbon fiber, a transparent conductive film such as an ITO film, and the like. ..
  • the insulating base material 42 can be an insulating material having appropriate electromagnetic transmission applicable, and for example, polycarbonate (PC), polyethylene (PE), polypropylene (PP, OPP), polyethylene terephthalate ( It is preferably formed of an insulating synthetic resin such as PET), polyethylene naphthalate (PEN), vinyl chloride (PVC), polystyrene (PS), acrylic (AC), or polyetheretherketone (PEEK).
  • the insulating base material 42 those having a refractive index n defined based on the complex permittivity of the front base material 2 and the rear base material 5 that match each other, or have substantially the same or close refractive index n are used. It is suitable from the viewpoint of improving the transmission performance of electromagnetic waves.
  • the numerical range of the refractive index n close to the front base material 2 and the rear base material 5 and the insulating base material 42 is the difference between the refractive index of the front base material 2 and the rear base material 5 and the refractive index of the insulating base material 42. It is good to keep it in the range of 0 to 10%.
  • the refractive index n is also a quantity defined as Equation 1 from the relative permittivity real part ⁇ r'and the relative permittivity imaginary part ⁇ r ". Further, also in the insulating base material 42, at the applicable frequency from the viewpoint of transparency. It is preferable that the size of the dielectric constant tan ⁇ defined as Equation 2 from the ratio of the imaginary part and the real part is 0.1 or less.
  • the electromagnetic wave transmitting resin body 10 constituting the radome 1 is composed of a power receiving side control unit 61 and a power receiving coil 62 together with a heater unit 41, and a wireless power receiving unit 6 for supplying electric power to the heater unit 41.
  • the wireless power receiving unit 6 is embedded in the rear base material 5 (see FIGS. 2 to 4).
  • the wireless power transmission unit 7 composed of the power transmission side control unit 71 and the power transmission coil 72 is arranged opposite to the wireless power reception unit 6 so as to face the power transmission coil 72.
  • the power receiving coils 62 are spaced apart from each other and arranged to face each other.
  • the power transmission side control unit 71 and the power transmission coil 72 of the wireless power transmission unit 7 are sealed in a resin sealant 70, and the power transmission side control unit 71 is connected to the vehicle body side control device 8 with a connection cord (see FIGS. 3 and 4). ).
  • the wireless power receiving unit 6 and the wireless power transmission unit 7 in the present embodiment are the wireless power receiving unit 6 and the wireless power transmission unit 7 of the electromagnetic induction type wireless power supply.
  • Both the wireless power receiving unit 6 and the wireless power transmitting unit 7 are arranged outside the electromagnetic wave irradiation regions R1 and R2 of the vehicle-mounted radar device 100, and in the illustrated example, the power receiving coil 62 of the wireless power receiving unit 6 is the electromagnetic wave transmitting region of the resin body 10. It is provided so as to surround the electromagnetic wave irradiation region R1 on the outside of the electromagnetic wave irradiation region R1 corresponding to the above, and the power receiving coil 62 and the transmission coil 72 of the wireless power transmission unit 7 are arranged so as to face each other (see FIGS. 1 and 3). ).
  • the lower limit of the separation distance between the power receiving coil 62 and the power transmission coil 72 is the distance at which the resin body 10 and the resin sealing body 70 are adjacently arranged in contact with each other.
  • the upper limit of the separation distance between the power receiving coil 62 and the power transmitting coil 72 can be appropriately set within an applicable range, but from the viewpoint of supplying electric power with high efficiency, the axial direction of the power receiving coil 62 and the power transmitting coil 72 It is preferable that the size of the coil diameter or the like of the power receiving coil 62 and the size of the coil diameter or the like of the power transmitting coil 72 in the orthogonal planes are 1 ⁇ 2 of the minimum length such as the minimum coil diameter.
  • the minor axis of the power receiving coil 62 and the minor axis of the transmitting coil 72 are halved of the smaller minor axis. Suitable.
  • an opening 701 is formed at a position substantially corresponding to the electromagnetic wave irradiation region R2 of the resin sealing body 70 that seals the wireless power transmission unit 7.
  • the heater unit 41 is provided at a position substantially corresponding to the electromagnetic wave irradiation region R1 of the resin body 10, and the heater unit 41 composed of the heater wires substantially imitates the outer surface of the radome 1 and electromagnetic waves. It is formed so as to meander the electromagnetic wave irradiation region R1 corresponding to the transmission region.
  • the wireless power receiving unit 6 and the wireless power transmission unit 7 are arranged so that the axial direction of the power receiving coil 62 of the wireless power receiving unit 6 and the axial direction of the power transmission coil 72 of the wireless power transmission unit 7 are substantially orthogonal to the heater unit 41, respectively. (See FIGS. 1 to 3).
  • the wireless power receiving unit 6 is composed of a power receiving side control unit 61 and a power receiving coil 62, and is electrically connected to the heater unit 41.
  • the power receiving side control unit 61 has a power receiving side control circuit 611 and a sensor 612 for detecting the temperature of the radome 1 or the resin body 10, and the power receiving side control circuit 611 controls the power supplied to the power receiving coil 62 without power supply. Then, it is supplied to the heater unit 41.
  • the power receiving side control circuit 611 for example, a predetermined value set and stored in the power receiving side control circuit 611 according to the detection temperature of the radome 1 or the resin body 10 detected by the sensor 612. The electric power is controlled to be supplied to the heater unit 41.
  • the wireless power transmission unit 7 is composed of a power transmission side control unit 71 and a power transmission coil 72, and is electrically connected to the vehicle body side control device 8.
  • the power transmission side control unit 71 has a power transmission side control circuit 711, and the power transmission side control circuit 711 causes a current to flow through the power transmission coil 72 or, if necessary, by a control command and electric power sent from the vehicle body side control device 8 to snowfall or the like.
  • the adjusted current is passed, and power is supplied to the power receiving coil 62 of the wireless power receiving unit 6 by electromagnetic induction type wireless power supply.
  • the power receiving side control unit 61 of the non-power receiving unit 6 is responsible for wireless communication with the power receiving side control circuit 611, the sensor 612, and the wireless power transmission unit 7.
  • a unit 613 is provided, a transmission side control circuit 711 is provided in the transmission side control unit 71 of the wireless transmission unit 7, a communication unit 712 is provided for wireless communication with the wireless power receiving unit 6, and the power receiving side control circuit 611 of the wireless power receiving unit 6 is provided.
  • the detected temperature is transmitted to the wireless transmission unit 7 via the communication unit 613 according to the detection temperature of the redome 1 or the resin body 10 detected by the sensor 612, and the transmission side control circuit 711 of the wireless transmission unit 7 transmits the communication unit 712.
  • the detected temperature is received via the above, adjusted to the predetermined current value set and stored in the transmission side control circuit 711 according to the received detection temperature, and the current is passed through the transmission coil 72, and wirelessly by electromagnetic induction type wireless power supply. It is also good to supply power to the power receiving coil 62 of the power receiving unit 6.
  • both the wireless power receiving unit 6 and the wireless power transmission unit 7 of the electromagnetic induction type wireless power supply are arranged outside the electromagnetic wave irradiation regions R1 and R2 of the in-vehicle radar device 100, and the power receiving coil of the wireless power receiving unit 6 is arranged.
  • the configuration in which the 62 is provided so as to surround the electromagnetic wave irradiation region R1 outside the electromagnetic wave irradiation region R1 of the resin body 10 has been described.
  • the power receiving unit 6m is configured together with the power receiving side control unit 61m.
  • the coil 62m is provided so as to be wound around a plurality of regions (two regions on the left and right in the illustrated example) outside the electromagnetic wave irradiation region R1 of the resin body 10, and the transmission coil 72m constituting the wireless transmission unit 7m together with the transmission side control unit 71m.
  • the transmission coil 72m constituting the wireless transmission unit 7m together with the transmission side control unit 71m.
  • the power receiving coil 62 m of the wireless power receiving unit 6 m and the power transmission coil 72 m of the wireless power transmission unit 7 m are separated from each other. It is also good to arrange it.
  • the separation distance between the power receiving coil 62m and the power transmission coil 72m is set in the same manner as the separation distance between the power reception coil 62 and the power transmission coil 72 described above.
  • both the wireless power receiving unit 6 and the wireless power transmission unit 7 of the electromagnetic induction type wireless power supply are arranged outside the electromagnetic wave irradiation regions R1 and R2 of the in-vehicle radar device 100, as shown in FIG.
  • a plurality of sets (two sets in the illustrated example) of a wireless power receiving unit 6n composed of a side control unit 61n and a power receiving coil 62n and a wireless power transmission unit 7n composed of a power transmission side control unit 71n and a power transmission coil 72n are installed. Even so, it is good.
  • the separation distance between the power receiving coil 62n and the power transmission coil 72n is set in the same manner as the separation distance between the power reception coil 62 and the power transmission coil 72 described above.
  • the wireless power transmission units 7, 7 m which are resin-sealed in the wireless power receiving units 6, 6 m, 6n embedded in the electromagnetic wave transmitting resin body 10 constituting the radome 1. Since it is possible to wirelessly supply power with 7n and supply power to the heater unit 41, the mechanical and electrical connection points of the heater side connector of the radome and the vehicle side connector themselves, and another waterproof member for this connection point can be used. It is possible to eliminate the need for waterproofing. Therefore, it is possible to reduce the manufacturing cost and improve the manufacturing efficiency.
  • the wireless power receiving units 6, 6m, 6n of the radome 1 are embedded in the resin body 10, and the wireless power transmission units 7, 7m, 7n separated from the radome 1 are sealed in the resin sealing body 70. , The required waterproofness can be reliably ensured when the vehicle is washed or when it rains. Further, since the wireless power transmission units 7, 7m, 7n and the wireless power receiving units 6, 6m, 6n can be freely arranged if they are separated from each other within a range in which the required wireless power supply can be performed, they can be freely arranged. The degree of freedom of placement can be increased. In addition, when the heater side connector of the radome and the vehicle side connector are mechanically and electrically connected, there is a risk of connection, mechanical fatigue of the joint, and disconnection. It is possible to eliminate the risk of physical fatigue and disconnection.
  • both the wireless power receiving units 6, 6m and 6n and the wireless power transmitting units 7, 7m and 7n are arranged outside the electromagnetic wave irradiation areas R1 and R2 of the in-vehicle radar device 100, and the heater unit 41 substantially corresponds to the electromagnetic wave irradiation area R1.
  • the wireless power receiving units 6, 6m, 6n and the wireless power transmitting units 7, 7m, 7n it is possible to prevent the electromagnetic wave transmission of the in-vehicle radar device 100 from being lowered. Further, it is possible to reliably melt the snow and ice adhering to the outer surface of the radome 1 in the electromagnetic wave irradiation region R1 of the vehicle-mounted radar device 100.
  • the axial directions of the power receiving coils 62, 62m, 62n of the wireless power receiving units 6, 6m, 6n and the axial directions of the power transmission coils 72, 72m, 72n of the wireless power transmission units 7, 7m, 7n are substantially orthogonal to the heater unit 41, respectively.
  • the millimeter wave which is the electromagnetic wave of the radar of the in-vehicle radar device 100
  • the electromagnetic wave used in the electromagnetic induction type wireless power supply usually have a large frequency difference, they do not interfere with the millimeter wave, and the function of the in-vehicle radar device 100 is exhibited well. Can be made to.
  • the wireless power receiving unit 6 and the wireless power transmission unit 7 are provided with the electromagnetic waves of the in-vehicle radar device 100. It is possible to prevent the transmission from being lowered. Further, the winding diameters of the power receiving coil 62 and the power transmission coil 72 can be made large in diameter surrounding the electromagnetic wave irradiation region R1 from the outside, so that the electric power required for snow melting of the heater unit 41 can be reliably supplied.
  • the resin body 10 greatly protrudes locally to the outside of the electromagnetic wave irradiation region R1. It is possible to prevent the radome shape from becoming such a shape, and it is possible to secure the aesthetic appearance of the radome 1.
  • the wireless power receiving unit 6m and the wireless power transmission unit 7m transmit the electromagnetic wave of the in-vehicle radar device 100. Can be prevented from being lowered. Further, by arranging the power receiving coil 6m and the power transmission coil 7m wound in the plurality of regions so as to face each other, even if the winding diameters of the power receiving coil 6m and the power transmission coil 7m in each region in the plurality of regions are reduced, the heater unit 41 can be used. The power required for snow melting can be reliably supplied.
  • the wireless power receiving unit 6n and the wireless power transmitting unit 7n by installing a plurality of combinations of the electromagnetic induction type wireless power feeding wireless power receiving unit 6n and the wireless power transmitting unit 7n, it is possible to prevent the wireless power receiving unit 6n and the wireless power transmitting unit 7n from reducing the electromagnetic wave transmission of the in-vehicle radar device 100. can do. Further, by installing a plurality of combinations of the wireless power receiving unit 6n and the wireless power transmission unit 7n of the electromagnetic induction type wireless power supply, even if the winding diameter of each power receiving coil 6n and the power transmission coil 7n is reduced, the snow melting of the heater unit 41 The necessary power can be reliably supplied.
  • each of the power receiving coil 6n and the power transmission coil 7n since it is possible to reduce the winding diameter of each of the power receiving coil 6n and the power transmission coil 7n, for example, a power receiving coil having a large winding diameter is embedded and the resin body 10 is locally large outside the electromagnetic wave irradiation region R1. It is possible to prevent the radome shape from protruding, and it is possible to secure the aesthetic appearance of the radome 1.
  • the electromagnetic wave emitted from the in-vehicle radar device 100 is resin-sealed.
  • the radome can be irradiated without passing through the inside of the body 70, and the electromagnetic wave transmission of the in-vehicle radar device 100 in the entire radome structure can be maximized.
  • the electromagnetic wave of the vehicle-mounted radar device 100 does not pass through the inside of the resin-sealed body 70
  • a material that is not constrained by the electromagnetic wave transmission of the vehicle-mounted radar device 100 to the electromagnetic wave can be used for the resin-sealed body 70, and the resin-sealed body 70 can be used.
  • the degree of freedom of the material that can be used for the stop body 70 can be increased.
  • the resin encapsulant 70 for resin-sealing the wireless power transmission unit 7 in the first embodiment has an opening 701 formed substantially in the center, and the electromagnetic wave irradiation region R2 of the in-vehicle radar device 100 is arranged in the opening 701.
  • the transmission coil and the power receiving coil when the radome structure for the in-vehicle radar device of the present invention is used for electromagnetic induction wireless power feeding may be configured by using, for example, a litz wire, an FPC coil, a wire wire or the like, which are appropriately preferable. It is possible, for example, it is preferable to use a litz wire in which fine wires are bundled for a transmission coil through which a large current flows, and for the power receiving coil, it is easy to reduce the thickness of the coil, and the heater portion and the power receiving side are used. It is preferable to use an FPC coil that can be easily integrated with the control unit. The shapes and sizes of the power transmission coil and the power reception coil can be different within the scope of the present invention.
  • the wireless power supply in the radome structure for the vehicle-mounted radar device of the present invention it is possible to apply other than the electromagnetic induction type wireless power supply within the scope of the present invention, for example, the wireless power reception of the electrolytic coupling type wireless power supply.
  • this wireless power receiving unit is embedded in a resin body, and the wireless power transmitting unit is embedded in a resin sealing body to be resin-sealed. It is possible to install a combination of the unit and the wireless transmission unit.
  • an epoxy polyurethane waterproofing material for example, an epoxy polyurethane waterproofing material, a polyester waterproofing material, a silicon waterproofing material, etc.
  • a waterproof layer and a water-repellent layer are laminated in this order on the outer surface of the resin body and fixedly provided to enhance both water repellency and waterproofness.
  • an in-vehicle radar device of the present invention such as the outer surface of the front base material 2 in the above embodiment, for example, a melamine-based hard coating agent, a urethane-based hard coating material, an acrylic-based hard coating material, etc.
  • An electromagnetically permeable hard coat layer of a material such as an organic hard coat material, a silicon hard coat material, or an inorganic hard coat material is fixedly provided so as to be laminated to protect the outer surface of the resin body and to protect the outer surface of the resin body. It is also good as a configuration that enhances strength and durability.
  • an organic hydrophilic material for example, an organic hydrophilic material, a silane-based hydrophilic material, a titania-based hydrophilic material, etc.
  • the present invention can be used as a structure of a radome for an in-vehicle radar device.
  • Communication unit 72, 72m, 72n Power transmission coil 70 ... Resin encapsulation 701 ... Opening 8 ... Body side control device 10 ... Resin body 100 ... In-vehicle radar device M ... Mark symbol part R1, R2 ... Electromagnetic wave irradiation area

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Vehicle Waterproofing, Decoration, And Sanitation Devices (AREA)
  • Details Of Aerials (AREA)

Abstract

Provided is a radome structure for an on-board radar device, in which a heater part 41 and a wireless power receiving unit 6 for supplying power to the heater part 41 are provided in an embedded manner in a resin body 10 that is transparent to electromagnetic wave and makes up a radome 1, a wireless power transmitting unit 7 is arranged spaced apart from and opposite to the wireless power receiving unit 6, and the wireless power transmitting unit 7 is sealed in a resin sealing body 70. Waterproofing treatment on mechanical and electrical mating segments of a connector on the heater side of a radome and a connector on the vehicle side can be dispensed with, desired waterproofing performance can be ensured during vehicle washing, against rainy weathers, etc., and a reduced manufacturing cost as well as an improved manufacturing efficiency can be achieved.

Description

車載レーダー装置用レドーム構造Radome structure for in-vehicle radar equipment
　本発明は、車載レーダー装置の前側に設けられる車載レーダー装置用レドームに係り、特に融雪機能を有する車載レーダー装置用レドーム構造に関する。 The present invention relates to a radome for an in-vehicle radar device provided on the front side of the in-vehicle radar device, and particularly relates to a radome structure for an in-vehicle radar device having a snow melting function.
　従来、車載レーダー装置用レドームとして、必要な電磁波の透過性の確保を図りつつ、融雪機能を発揮するレドームが知られている。このようなレドームとして、透明部材と、加飾層と、前基材と、ヒーター部を構成する樹脂シート、線状発熱体及びその電極と、後基材が前から順に配置され、線状発熱体の両電極に接続される防水コネクタが後基材の後方に露出され、この防水コネクタに車両側コネクタが後側から結合されてヒーター部に電力が供給される特許文献１、２のレドームがある。 Conventionally, as a radome for an in-vehicle radar device, a radome that exhibits a snow melting function while ensuring the necessary electromagnetic wave transmission is known. As such a radome, a transparent member, a decorative layer, a front base material, a resin sheet constituting a heater portion, a linear heating element and its electrodes, and a rear base material are arranged in order from the front, and linear heat generation is performed. The radomes of Patent Documents 1 and 2 in which the waterproof connector connected to both electrodes of the body is exposed behind the rear base material, and the vehicle side connector is coupled to this waterproof connector from the rear side to supply power to the heater portion. be.
　尚、特許文献３には、車両の斜室内の複数の部位に装着され、ヒーター部を着脱可能に保持固定する複数の設置機構を有し、設置機構側に無線給電用のワイヤレス送信機、ヒーター部側に無線給電用のワイヤレス送信機が設けられ、設置機構からヒーター部に無線給電するヒーター装置が開示されている。 It should be noted that Patent Document 3 has a plurality of installation mechanisms that are attached to a plurality of parts in the inclined chamber of the vehicle and that hold and fix the heater portion detachably, and the installation mechanism side has a wireless transmitter and a heater for wireless power supply. A wireless transmitter for wireless power supply is provided on the unit side, and a heater device that wirelessly supplies power to the heater unit from the installation mechanism is disclosed.
特開２０１８－６６７０５号公報Japanese Unexamined Patent Publication No. 2018-66705 特開２０１８－６６７０６号公報Japanese Unexamined Patent Publication No. 2018-66706 特許第６５７８８９３号公報Japanese Patent No. 6578893
　ところで、特許文献１、２の車載レーダー装置用レドームは、後基材の後方に露出されるヒーター部側の防水構造の防水コネクタが車両側コネクタに機械的、電気的に結合されて電力が供給される構造であるが、この構造だけでは、車両洗車時や雨天時等に対する所要の防水性を確保するために十分ではない。即ち、この構造を車両に実際に搭載して所要の防水性を確保するには、ヒーター部側のコネクタを防水構造にすることに加え、ヒーター部側コネクタと車両側コネクタの結合箇所に別の防水部材を用いて防水処理を施すことが必要になる。 By the way, in the red dome for an in-vehicle radar device of Patent Documents 1 and 2, a waterproof connector having a waterproof structure on the heater portion side exposed behind the rear base material is mechanically and electrically coupled to the vehicle side connector to supply power. However, this structure alone is not sufficient to ensure the required waterproofness when the vehicle is washed or when it rains. That is, in order to actually mount this structure on the vehicle and secure the required waterproofness, in addition to making the connector on the heater part a waterproof structure, another connection point between the connector on the heater part and the connector on the vehicle side is provided. It is necessary to apply waterproof treatment using a waterproof member.
　このように別の防水部材を用いて防水処理を施すと、レドームのヒーター部側コネクタと車両側コネクタの結合箇所を防水する防水部材の追加によって部品点数が増加し、製造コストが増加する。更に、レドームのヒーター部側コネクタと車両側コネクタの結合箇所に対して防水加工を行うことにより、工程数が増加し、製造効率が低下する。更に、レドームの後基材の後方に露出されるヒーター部側コネクタと車両側コネクタの結合箇所に対する防水処理は、レドームが取り付けられる被着部分等の周辺部材による空間的制約、スペースの制約を受けやすく、所要の防水性を確保するための防水処理を行えるケースが限定されるという不具合もある。 If waterproofing is performed using another waterproofing member in this way, the number of parts will increase due to the addition of a waterproofing member that waterproofs the joint between the heater side connector of the radome and the vehicle side connector, and the manufacturing cost will increase. Further, by waterproofing the joint portion between the heater side connector of the radome and the vehicle side connector, the number of steps is increased and the manufacturing efficiency is lowered. Furthermore, the waterproof treatment for the joint between the heater side connector and the vehicle side connector exposed behind the rear base material of the radome is subject to space restrictions and space restrictions due to peripheral members such as the adherend to which the radome is attached. There is also a problem that it is easy and the cases where waterproof treatment can be performed to ensure the required waterproofness are limited.
　本発明は上記課題に鑑み提案するものであり、レドームのヒーター側コネクタと車両側コネクタの機械的、電気的な結合箇所に対する防水処理を無くしつつ、車両洗車時や雨天時等に対する所要の防水性を確保することができ、製造コストの低減、製造効率の向上を図ることができると共に、ヒーター部に対する電力供給部品の配置の自由度を高めることができる車載レーダー装置用レドーム構造を提供することを目的とする。 The present invention has been proposed in view of the above problems, and is required to have waterproofness for vehicle washing, rainy weather, etc., while eliminating waterproofing treatment for mechanical and electrical joints between the heater side connector of the radome and the vehicle side connector. It is possible to provide a radome structure for an in-vehicle radar device that can secure the above, reduce the manufacturing cost, improve the manufacturing efficiency, and increase the degree of freedom in arranging the power supply parts with respect to the heater part. The purpose.
　本発明の車載レーダー装置用レドーム構造は、レドームを構成する電磁波透過性の樹脂体にヒーター部、前記ヒーター部に電力を供給する無線受電ユニットが埋め込んで設けられ、無線送電ユニットが前記無線受電ユニットと離間して対向配置され、前記無線送電ユニットが樹脂封止体に封止されていることを特徴とする。
　これによれば、レドームを構成する電磁波透過性の樹脂体に埋め込まれる無線受電ユニットに樹脂封止された無線送電ユニットで無線給電し、ヒーター部に電力を供給することができることから、レドームのヒーター側コネクタと車両側コネクタの機械的、電気的な結合箇所自体、及びこの結合箇所に対する別の防水部材で防水処理を行う必要を無くすことができる。従って、製造コストの低減、製造効率の向上を図ることができる。また、レドームの無線受電ユニットが樹脂体に埋め込まれることに加え、レドームと離間する無線送電ユニットが樹脂封止体に封止されることから、車両洗車時や雨天時等に対する所要の防水性を確実に確保することができる。また、無線送電ユニットと無線受電ユニットは所要の無線給電を行える範囲で離間して対向配置すれば、自由に配置できることから、ヒーター部に対する電力供給部品の配置の自由度を高めることができる。また、レドームのヒーター側コネクタと車両側コネクタを機械的、電気的に結合する場合には、結合、接合箇所の機械的疲労、断線が生ずるリスクが生ずるが、このような結合、接合箇所の機械的疲労、断線リスクを無くすことができる。 The radome structure for an in-vehicle radar device of the present invention is provided with a heater unit and a wireless power receiving unit that supplies electric power to the heater unit embedded in an electromagnetic wave transmitting resin body constituting the radar, and the wireless power transmission unit is the wireless power receiving unit. It is characterized in that the wireless power transmission unit is arranged so as to face each other apart from the above, and the wireless power transmission unit is sealed in a resin encapsulation body.
According to this, the wireless power transmission unit embedded in the electromagnetic wave transmissive resin body constituting the redome can be wirelessly supplied with power by the resin-sealed wireless power transmission unit to supply power to the heater unit. Therefore, the heater of the redome can be supplied with electric power. It is possible to eliminate the need for waterproofing with the mechanical and electrical joints themselves between the side connector and the vehicle side connector, and with a separate waterproofing member for these joints. Therefore, it is possible to reduce the manufacturing cost and improve the manufacturing efficiency. In addition to the wireless power receiving unit of the radome being embedded in the resin body, the wireless power transmission unit separated from the radome is sealed in the resin encapsulation body, so that the required waterproofness is achieved when the vehicle is washed or in the rain. It can be surely secured. Further, if the wireless power transmission unit and the wireless power receiving unit are arranged so as to be separated from each other within a range in which the required wireless power supply can be performed, they can be freely arranged, so that the degree of freedom in arranging the power supply parts with respect to the heater unit can be increased. In addition, when the heater side connector of the radome and the vehicle side connector are mechanically and electrically connected, there is a risk of connection, mechanical fatigue of the joint, and disconnection. It is possible to eliminate the risk of physical fatigue and disconnection.
　本発明の車載レーダー装置用レドーム構造は、前記無線受電ユニット及び前記無線送電ユニットの双方が車載レーダー装置の電磁波照射領域の外側に配置され、前記ヒーター部が前記電磁波照射領域と略対応する位置に設けられていることを特徴とする。
　これによれば、無線受電ユニット及び無線送電ユニットが車載レーダー装置の電磁波透過を低下させることを防止することができる。また、車載レーダー装置の電磁波照射領域についてレドームの外表面に付着した雪や氷を確実に融雪することができる。 In the radome structure for an in-vehicle radar device of the present invention, both the wireless power receiving unit and the wireless power transmission unit are arranged outside the electromagnetic wave irradiation area of the in-vehicle radar device, and the heater unit is located at a position substantially corresponding to the electromagnetic wave irradiation area. It is characterized by being provided.
According to this, it is possible to prevent the wireless power receiving unit and the wireless power transmission unit from reducing the electromagnetic wave transmission of the in-vehicle radar device. In addition, snow and ice adhering to the outer surface of the radome can be reliably melted in the electromagnetic wave irradiation region of the in-vehicle radar device.
　本発明の車載レーダー装置用レドーム構造は、前記無線受電ユニット及び前記無線送電ユニットが電磁誘導式無線給電の前記無線受電ユニット及び前記無線送電ユニットであり、前記無線受電ユニットの受電コイルの軸方向と前記無線送電ユニットの送電コイルの軸方向がそれぞれ前記ヒーター部と略直交するようにして、前記無線受電ユニット及び前記無線送電ユニットが配置されることを特徴とする。
　これによれば、電磁誘導式無線給電でヒーター部に融雪に必要な電力を効率的に供給し、ヒーター部を省電力で効率的に加熱することができる。また、車載レーダー装置のレーダーの電磁波であるミリ波と、電磁誘導式無線給電で用いる電磁波は通常、周波数が大きく異なるため、ミリ波と干渉せず、車載レーダー装置の機能を良好に発揮させることができる。 In the radome structure for an in-vehicle radar device of the present invention, the wireless power receiving unit and the wireless power transmitting unit are the wireless power receiving unit and the wireless power transmitting unit in which the wireless power transmission unit is an electromagnetic induction type wireless power supply, and the axial direction of the power receiving coil of the wireless power receiving unit. The wireless power transfer unit and the wireless power transfer unit are arranged so that the axial directions of the transmission coils of the wireless power transfer unit are substantially orthogonal to the heater unit.
According to this, the electric power required for snowmelt can be efficiently supplied to the heater unit by the electromagnetic induction type wireless power supply, and the heater unit can be efficiently heated with power saving. In addition, since the millimeter wave, which is the electromagnetic wave of the radar of the in-vehicle radar device, and the electromagnetic wave used in the electromagnetic induction type wireless power supply usually have a large difference in frequency, they do not interfere with the millimeter wave, and the function of the in-vehicle radar device should be exhibited well. Can be done.
　本発明の車載レーダー装置用レドーム構造は、電磁誘導式無線給電の前記無線受電ユニット及び前記無線送電ユニットの双方が車載レーダー装置の電磁波照射領域の外側に配置されると共に、前記無線受電ユニットの受電コイルが前記樹脂体の前記電磁波照射領域の外側で前記電磁波照射領域を囲むように設けられ、前記無線送電ユニットの送電コイルが前記受電コイルと離間して対向配置されていることを特徴とする。
　これによれば、無線受電ユニット及び無線送電ユニットが車載レーダー装置の電磁波透過を低下させることを防止することができる。また、受電コイルと送電コイルの巻径を電磁波照射領域を外側から囲む大きな径にして、ヒーター部の融雪に必要な電力を確実に供給することができる。また、電磁波照射領域の外側のスペースを有効活用して受電コイル及び対応する送電コイルを設置することが可能であり、例えば樹脂体が電磁波照射領域の外側に局所的に大きく突出するようなレドーム形状になることを防止することができ、レドームの外観形状の美観を確保することができる。 In the redo structure for an in-vehicle radar device of the present invention, both the wireless power receiving unit and the wireless power transmitting unit of the electromagnetic induction type wireless power supply are arranged outside the electromagnetic wave irradiation region of the in-vehicle radar device, and the power receiving unit is received. The coil is provided so as to surround the electromagnetic wave irradiation region outside the electromagnetic wave irradiation region of the resin body, and the transmission coil of the wireless transmission unit is arranged so as to be separated from the power receiving coil.
According to this, it is possible to prevent the wireless power receiving unit and the wireless power transmission unit from reducing the electromagnetic wave transmission of the in-vehicle radar device. Further, the winding diameters of the power receiving coil and the power transmitting coil can be made large in diameter so as to surround the electromagnetic wave irradiation region from the outside, so that the electric power required for snow melting of the heater portion can be reliably supplied. Further, it is possible to effectively utilize the space outside the electromagnetic wave irradiation area to install the power receiving coil and the corresponding power transmission coil. For example, a radome shape in which the resin body locally greatly protrudes to the outside of the electromagnetic wave irradiation area. It is possible to prevent the radome from becoming, and it is possible to secure the aesthetic appearance of the appearance shape of the radome.
　本発明の車載レーダー装置用レドーム構造は、電磁誘導式無線給電の前記無線受電ユニット及び前記無線送電ユニットの双方が車載レーダー装置の電磁波照射領域の外側に配置されると共に、前記無線受電ユニットの受電コイルが前記樹脂体の前記電磁波照射領域の外側の複数領域でそれぞれ巻回されるように設けられ、前記無線送電ユニットの送電コイルが前記受電コイルと離間して対向配置されていることを特徴とする。
　これによれば、無線受電ユニット及び無線送電ユニットが車載レーダー装置の電磁波透過を低下させることを防止することができる。また、受電コイルを樹脂体の電磁波照射領域の外側の複数領域でそれぞれ巻回し、複数領域でそれぞれ巻回された受電コイルと送電コイルを対向配置することにより、複数領域における各領域の受電コイルと送電コイルの巻径を小さくしても、ヒーター部の融雪に必要な電力を確実に供給することができる。また、複数領域における各領域の受電コイルと送電コイルの巻径を小さくすることが可能であるから、例えば巻径の大きな受電コイルが埋め込まれて樹脂体が電磁波照射領域の外側に局所的に大きく突出するようなレドーム形状になることを防止することができ、レドームの外観形状の美観を確保することができる。 In the redo structure for an in-vehicle radar device of the present invention, both the wireless power receiving unit and the wireless power transmitting unit of the electromagnetic induction type wireless power supply are arranged outside the electromagnetic wave irradiation region of the in-vehicle radar device, and the wireless power receiving unit receives power. The coil is provided so as to be wound in a plurality of regions outside the electromagnetic wave irradiation region of the resin body, and the transmission coil of the wireless power transmission unit is arranged so as to be separated from the power receiving coil and opposed to the power receiving coil. do.
According to this, it is possible to prevent the wireless power receiving unit and the wireless power transmission unit from reducing the electromagnetic wave transmission of the in-vehicle radar device. Further, the power receiving coil is wound in a plurality of regions outside the electromagnetic wave irradiation region of the resin body, and the power receiving coil and the power transmission coil wound in the plurality of regions are arranged so as to face each other, so that the power receiving coil in each region can be obtained. Even if the winding diameter of the power transmission coil is reduced, the electric power required for melting snow in the heater portion can be reliably supplied. Further, since it is possible to reduce the winding diameters of the power receiving coil and the power transmitting coil in each region in a plurality of regions, for example, a power receiving coil having a large winding diameter is embedded and the resin body is locally large outside the electromagnetic wave irradiation region. It is possible to prevent the radome shape from protruding, and it is possible to ensure the aesthetic appearance of the radome.
　本発明の車載レーダー装置用レドーム構造は、電磁誘導式無線給電の前記無線受電ユニット及び前記無線送電ユニットの双方が車載レーダー装置の電磁波照射領域の外側に配置されると共に、電磁誘導式無線給電の前記無線受電ユニット及び前記無線送電ユニットの組み合わせが複数組設置されることを特徴とする。
　これによれば、無線受電ユニット及び無線送電ユニットが車載レーダー装置の電磁波透過を低下させることを防止することができる。また、電磁誘導式無線給電の無線受電ユニット及び無線送電ユニットの組み合わせを複数組設置することにより、各々の受電コイルと送電コイルの巻径を小さくしても、ヒーター部の融雪に必要な電力を確実に供給することができる。また、各々の受電コイルと送電コイルの巻径を小さくすることが可能であるから、例えば巻径の大きな受電コイルが埋め込まれて樹脂体が電磁波照射領域の外側に局所的に大きく突出するようなレドーム形状になることを防止することができ、レドームの外観形状の美観を確保することができる。 In the redo structure for an in-vehicle radar device of the present invention, both the wireless power receiving unit and the wireless power transmission unit of the electromagnetically guided wireless power supply are arranged outside the electromagnetic wave irradiation region of the in-vehicle radar device, and the electromagnetically guided wireless power supply is supplied. It is characterized in that a plurality of combinations of the wireless power receiving unit and the wireless power transmitting unit are installed.
According to this, it is possible to prevent the wireless power receiving unit and the wireless power transmission unit from reducing the electromagnetic wave transmission of the in-vehicle radar device. In addition, by installing multiple sets of wireless power receiving units and wireless power transmission units for electromagnetic induction wireless power supply, even if the winding diameter of each power receiving coil and power transmission coil is reduced, the power required for snow melting in the heater section can be obtained. It can be reliably supplied. Further, since it is possible to reduce the winding diameter of each power receiving coil and power transmitting coil, for example, a power receiving coil having a large winding diameter is embedded so that the resin body locally protrudes greatly to the outside of the electromagnetic wave irradiation region. It is possible to prevent the radome from becoming a shape, and it is possible to secure the aesthetic appearance of the radome.
　本発明の車載レーダー装置用レドーム構造は、前記無線送電ユニットを封止した前記樹脂封止体の前記電磁波照射領域と略対応する位置に開口が形成されていることを特徴とする。
　これによれば、車載レーダー装置から照射した電磁波を樹脂封止体の内部を通過させずにレドームに照射することができ、レドーム構造全体における車載レーダー装置の電磁波透過性を最大限に高めることができる。また、車載レーダー装置の電磁波が樹脂封止体の内部を通過しないことから、車載レーダー装置の電磁波に対する電磁波透過性に拘束されない材料を樹脂封止体に用いることができ、樹脂封止体に使用可能な材料の自由度を高めることができる。 The radome structure for an in-vehicle radar device of the present invention is characterized in that an opening is formed at a position substantially corresponding to the electromagnetic wave irradiation region of the resin encapsulation body that encloses the wireless power transmission unit.
According to this, the electromagnetic wave emitted from the in-vehicle radar device can be applied to the radome without passing through the inside of the resin encapsulation body, and the electromagnetic wave transmission of the in-vehicle radar device in the entire radome structure can be maximized. can. Further, since the electromagnetic wave of the in-vehicle radar device does not pass through the inside of the resin encapsulation body, a material that is not restricted by the electromagnetic wave transmission of the in-vehicle radar device can be used for the resin encapsulation body, and is used for the resin encapsulation body. The degree of freedom of possible materials can be increased.
　本発明の車載レーダー装置用レドーム構造によれば、レドームのヒーター側コネクタと車両側コネクタの機械的、電気的な結合箇所に対する防水処理を無くしつつ、車両洗車時や雨天時等に対する所要の防水性を確保することができ、製造コストの低減、製造効率の向上を図ることができると共に、ヒーター部に対する電力供給部品の配置の自由度を高めることができる。 According to the radome structure for an in-vehicle radar device of the present invention, the required waterproof property for vehicle washing, rainy weather, etc., while eliminating the waterproof treatment for the mechanical and electrical joints between the heater side connector and the vehicle side connector of the radome. It is possible to reduce the manufacturing cost and improve the manufacturing efficiency, and it is possible to increase the degree of freedom in arranging the power supply parts with respect to the heater unit.
本発明による第１実施形態の車載レーダー装置用レドーム構造におけるレドームを示す正面図。The front view which shows the radome in the radome structure for the vehicle-mounted radar apparatus of 1st Embodiment by this invention. 図１のＡ－Ａ拡大端面図。AA enlarged end view of FIG. 1. 本発明による第１実施形態の車載レーダー装置用レドーム構造の模式説明図。The schematic explanatory view of the radome structure for the vehicle-mounted radar apparatus of 1st Embodiment by this invention. （ａ）は第１実施形態における無線受電ユニットのブロック図、（ｂ）は第１実施形態における無線送電ユニットのブロック図。(A) is a block diagram of the wireless power receiving unit in the first embodiment, and (b) is a block diagram of the wireless power transmission unit in the first embodiment. （ａ）は第１実施形態の第１変形例の車載レーダー装置用レドーム構造におけるレドームを示す模式正面図、（ｂ）はその第１変形例における送電ユニットを内蔵する樹脂封止体を示す模式正面図。(A) is a schematic front view showing a radome in a radome structure for an in-vehicle radar device of the first modification of the first embodiment, and (b) is a schematic showing a resin encapsulation body containing a power transmission unit in the first modification. Front view. （ａ）は第１実施形態の第２変形例の車載レーダー装置用レドーム構造におけるレドームを示す模式正面図、（ｂ）はその第２変形例における送電ユニットを内蔵する樹脂封止体を示す模式正面図。(A) is a schematic front view showing a radome in a radome structure for an in-vehicle radar device of a second modification of the first embodiment, and (b) is a schematic showing a resin encapsulation body containing a power transmission unit in the second modification. Front view.
　〔第１実施形態の車載レーダー装置用レドーム構造〕
　本発明による第１実施形態の車載レーダー装置用レドーム構造は、例えば図１及び図２に示すようなレドーム１を備える。レドーム１は、透明で電磁波透過性の前基材２と、加飾層３と、ヒーター層４と、電磁波透過性の後基材５が表面側から順に密接するように固着して設けられ、前基材２と、後述するヒーター層４の絶縁基材４２と、後基材５でレドーム１を構成する電磁波透過性の樹脂体１０が構成されている。図示例の前基材２は正面視で円形に近い楕円形であり、この透明の前基材２を介して、表面側から意匠部を構成するマーク記号部Ｍを視認可能になっている。図１中のＲは電磁波透過領域である。尚、エンブレムのようなマーク記号部Ｍを有しないレドームにも、本実施形態の車載レーダー装置用レドーム構造は適用可能である。 [Radome structure for in-vehicle radar device of the first embodiment]
The radome structure for an in-vehicle radar device according to the first embodiment of the present invention includes, for example, a radome 1 as shown in FIGS. 1 and 2. The radome 1 is provided by fixing the transparent and electromagnetic wave transmitting front base material 2, the decorative layer 3, the heater layer 4, and the electromagnetic wave transmitting rear base material 5 so as to be in close contact with each other in order from the surface side. The front base material 2, the insulating base material 42 of the heater layer 4 described later, and the rear base material 5 constitute an electromagnetic wave transmitting resin body 10 that constitutes the radome 1. The front base material 2 in the illustrated example has an elliptical shape that is close to a circle when viewed from the front, and the mark symbol portion M constituting the design portion can be visually recognized from the surface side through the transparent front base material 2. R in FIG. 1 is an electromagnetic wave transmission region. The radome structure for an in-vehicle radar device of the present embodiment can also be applied to a radome that does not have the mark symbol portion M such as an emblem.
　透明な前基材２と、後基材５は絶縁性で電磁波透過性を有する。前基材２と、後基材５には、例えば同一材料で形成する等、複素誘電率に基づき定義される屈折率ｎが相互に整合する、又は、屈折率ｎが略同一或いは近接するものを用いると電磁波の透過性能向上の観点から好適である。前基材２と後基材５の近接する屈折率ｎの数値範囲としては、前基材２と後基材５の屈折率の相違が０～１０％の範囲内とすると良好である。 The transparent front base material 2 and the rear base material 5 are insulating and have electromagnetic wave transmission. The refractive index n defined based on the complex permittivity of the front base material 2 and the rear base material 5 are matched with each other, or the refractive indexes n are substantially the same or close to each other, for example, they are formed of the same material. Is suitable from the viewpoint of improving the transmission performance of electromagnetic waves. As the numerical range of the refractive index n close to the front base material 2 and the rear base material 5, it is preferable that the difference in the refractive index between the front base material 2 and the rear base material 5 is within the range of 0 to 10%.
　ここでの屈折率ｎは比誘電率実数部εr'と比誘電率虚数部εr"から数式１として定義される量である。 透過性の観点から適用周波数における虚数部と実数部の比から数式２として定義される誘電正接（ロスタンジェント）tanδの大きさは０．１以下とすると好適である。また比誘電率実部の大きさは３以下とすると好適である。誘電正接と非誘電率実部の大きさをこれらの数値以下とすることにより、レドームに必要とされる反射率と内部損失の低減を確実にすることが可能となる。 The refractive index n here is a quantity defined as Equation 1 from the relative permittivity real part εr'and the relative permittivity imaginary part εr'. It is preferable that the size of the dielectric tangent tan δ defined as 2 is 0.1 or less, and the size of the real part of the relative permittivity is 3 or less. By making the size of the real part smaller than these values, it is possible to ensure the reduction of the refractive index and the internal loss required for the redome.
Figure JPOXMLDOC01-appb-M000001
Figure JPOXMLDOC01-appb-M000001
Figure JPOXMLDOC01-appb-M000002
Figure JPOXMLDOC01-appb-M000002
　前基材２と、後基材５は、合成樹脂、ガラス、セラミックス等の本発明の趣旨の範囲内で適宜の材料を用いることが可能であるが、好適には絶縁性の合成樹脂とするとよい。透明の前基材２は、良好な視認性を確保するため可視光線透過率５０％以上の無色材料又は有色材料とすることが好ましい。 As the front base material 2 and the rear base material 5, appropriate materials such as synthetic resin, glass, and ceramics can be used within the scope of the present invention, but it is preferable to use an insulating synthetic resin. good. The transparent front base material 2 is preferably a colorless material or a colored material having a visible light transmittance of 50% or more in order to ensure good visibility.
　前基材２を絶縁性の透明合成樹脂とする場合の材料は、適用可能な範囲で適宜であり、例えばポリカーボネート（ＰＣ）、ポリメチルメタクリレート（ＰＭＭＡ）等のアクリル系樹脂、アクリロニトリル－ブタジエン－スチレン共重合体（ＡＢＳ）、ポリエチレンテレフタレート（ＰＥＴ）、ポリエチレン（ＰＥ）、ポリプロピレン（ＰＰ）、アクリロニトリル－スチレン共重合体（ＡＳ）、ポリスチレン（ＰＳ）、シクロオレフィンポリマー（ＣＯＰ）等の１種を単独でまたは２種以上を組み合わせて用いることができ、又、添加剤を含有させてもよい。 When the front base material 2 is an insulating transparent synthetic resin, the material is appropriate to the extent applicable, and for example, an acrylic resin such as polycarbonate (PC) or polymethylmethacrylate (PMMA), or acrylonitrile-butadiene-styrene. A single type of copolymer (ABS), polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), acrylonitrile-styrene copolymer (AS), polystyrene (PS), cycloolefin polymer (COP), etc. Or in combination of two or more, and may contain an additive.
　後基材５を絶縁性の合成樹脂とする場合の材料は、適用可能な範囲で適宜であり、例えばアクリロニトリル－エチレンプロピルラバー－スチレン共重合体（ＡＥＳ）、ポリメチルメタクリレート（ＰＭＭＡ）等のアクリル系樹脂、ポリカーボネート（ＰＣ）、アクリロニトリル－ブタジエン－スチレン共重合体（ＡＢＳ）、アクリロニトリル－スチレン－アクリレート共重合（ＡＳＡ）等の１種を単独でまたは２種以上を組み合わせて用いることができ、又、添加剤を含有させてもよい。 When the back base material 5 is an insulating synthetic resin, the material is appropriate to the extent applicable, and for example, acrylics such as acrylonitrile-ethylenepropyl rubber-styrene copolymer (AES) and polymethylmethacrylate (PMMA). One type of resin, polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-styrene-acrylate copolymer (ASA), etc. can be used alone or in combination of two or more. , Additives may be contained.
　前基材２の背面には、加飾層３が密着して設けられており、本実施形態の加飾層３は、電磁波透過性金属部３１と有色部３２とから構成されている。尚、加飾層３は、本発明の趣旨の範囲内で適宜であり、電磁波透過性金属部３１と有色部３２で構成される加飾層３以外にも、例えば電磁波透過性金属部だけで構成される加飾層、或いは有色部だけで構成される加飾層等とすることが可能である。 A decorative layer 3 is provided in close contact with the back surface of the front base material 2, and the decorative layer 3 of the present embodiment is composed of an electromagnetic wave transmitting metal portion 31 and a colored portion 32. The decorative layer 3 is appropriate within the scope of the present invention, and other than the decorative layer 3 composed of the electromagnetic wave transmitting metal portion 31 and the colored portion 32, for example, only the electromagnetic wave transmitting metal portion is used. It is possible to use a decorative layer composed of a colored portion, a decorative layer composed of only a colored portion, or the like.
　電磁波透過性金属部３１は、例えば電磁波透過性で金属光沢を有する不連続金属層で構成され、光輝性で一体的な視認性を有し、前基材２の背面に無電解めっき、蒸着又はスパッタ等で形成されている。電磁波透過性金属部３１を光輝性で一体的な視認性を有する不連続金属層とする場合、例えばニッケル若しくはニッケル合金、クロム若しくはクロム合金、コバルト若しくはコバルト合金、錫若しくは錫合金、銅若しくは銅合金、銀若しくは銀合金、パラジウム若しくはパラジウム合金、白金若しくは白金合金、ロジウム若しくはロジウム合金、金若しくは金合金等から構成することが可能である。 The electromagnetic wave transmissive metal portion 31 is composed of, for example, a discontinuous metal layer that is electromagnetic wave transmissive and has a metallic luster, has brilliant and integrated visibility, and is electroless plated, vapor-deposited, or formed on the back surface of the front base material 2. It is formed by spatter or the like. When the electromagnetic wave transmitting metal portion 31 is a discontinuous metal layer having brilliant and integral visibility, for example, nickel or nickel alloy, chromium or chromium alloy, cobalt or cobalt alloy, tin or tin alloy, copper or copper alloy. , Silver or silver alloy, palladium or palladium alloy, platinum or platinum alloy, rhodium or rhodium alloy, gold or gold alloy and the like.
　有色部３２は、電磁波透過性を有し、印刷、又は塗装マスクを用いた塗装等で形成されている。本実施形態の加飾層３では、有色部３２が電磁波透過性金属部３１の表面側の一部に積層されるようにして前基材２の背面に密着して設けられており、前基材２の背面が露出している領域と、有色部３２が設けられている領域の全体に亘って電磁波透過性金属部３１が層状に形成され、前基材２の露出した背面と有色部３２に密着して設けられている。 The colored portion 32 has electromagnetic wave transmission and is formed by printing or painting using a painting mask. In the decorative layer 3 of the present embodiment, the colored portion 32 is provided in close contact with the back surface of the front base material 2 so as to be laminated on a part of the surface side of the electromagnetic wave transmitting metal portion 31. The electromagnetic wave transmitting metal portion 31 is formed in a layer over the entire region where the back surface of the material 2 is exposed and the region where the colored portion 32 is provided, and the exposed back surface and the colored portion 32 of the front base material 2 are formed. It is provided in close contact with.
　そして、前基材２の背面側には、マーク記号部Ｍに対応する位置に凹部２１が形成されており、加飾層３は、凹部２１に倣うように断面視で表面側に部分突出して曲がって形成されている。図示例では、加飾層３の電磁波透過性金属部３１が凹部２１に倣うように部分突出して形成され、凹部２１には有色部３２は設けられず、電磁波透過性金属部３１だけが入り込んで設けられている。また、図示例の有色部３２は、前基材２の凹部２１以外の背面に沿うように密着して設けられている。 A recess 21 is formed on the back surface side of the front base material 2 at a position corresponding to the mark symbol portion M, and the decorative layer 3 partially protrudes toward the surface side in a cross-sectional view so as to imitate the recess 21. It is bent and formed. In the illustrated example, the electromagnetic wave transmitting metal portion 31 of the decorative layer 3 is formed so as to partially project so as to imitate the concave portion 21, and the concave portion 21 is not provided with the colored portion 32, and only the electromagnetic wave transmitting metal portion 31 enters. It is provided. Further, the colored portion 32 of the illustrated example is provided in close contact with the back surface of the front base material 2 other than the recess 21.
　加飾層３の背面３３側には、ヒーター層４が積層して固着され、ヒーター層４は、本例ではヒーター線で構成されるヒーター部４１が絶縁基材４２に固着して構成されている。ヒーター層４及びヒーター部４１は、凹部２１に対応する箇所で凹部２１に倣うように表面側に部分突出して曲がって形成され、この部分突出する突出部が、凹部２１及びこれに入り込むように凹形に形成された加飾層３に係合されるようにして配置されている。また、絶縁基材４２の背面には後基材５が固着して設けられている。 The heater layer 4 is laminated and fixed to the back surface 33 side of the decorative layer 3, and the heater layer 4 is configured such that the heater portion 41 composed of the heater wire is fixed to the insulating base material 42 in this example. There is. The heater layer 4 and the heater portion 41 are formed at a portion corresponding to the recess 21 so as to partially project toward the surface side so as to follow the recess 21, and the projecting portion is formed so as to enter the recess 21 and the recess 21. It is arranged so as to be engaged with the decorative layer 3 formed in the shape. Further, the rear base material 5 is fixedly provided on the back surface of the insulating base material 42.
　ヒーター線で構成されるヒーター部４１は、例えばニクロム線、鉄クロム、銅、銀、カーボン繊維、ＩＴＯ膜のような透明導電膜等の適用可能な適宜の導電性材料とすることが可能である。また、絶縁基材４２は、適用可能な適宜の電磁波透過性を有する絶縁性素材とすることが可能であり、例えばポリカーボネート（ＰＣ）、ポリエチレン（ＰＥ）、ポリプロピレン（ＰＰ、ＯＰＰ）、ポリエチレンテレフタレート（ＰＥＴ）、ポリエチレンナフタレート（ＰＥＮ）、塩化ビニル（ＰＶＣ）、ポリスチレン（ＰＳ）、アクリル（ＡＣ）、又はポリエーテルエーテルケトン（ＰＥＥＫ）等の絶縁性合成樹脂で形成すると好適である。 The heater portion 41 composed of the heater wire can be made of an appropriate conductive material such as nichrome wire, iron chromium, copper, silver, carbon fiber, a transparent conductive film such as an ITO film, and the like. .. Further, the insulating base material 42 can be an insulating material having appropriate electromagnetic transmission applicable, and for example, polycarbonate (PC), polyethylene (PE), polypropylene (PP, OPP), polyethylene terephthalate ( It is preferably formed of an insulating synthetic resin such as PET), polyethylene naphthalate (PEN), vinyl chloride (PVC), polystyrene (PS), acrylic (AC), or polyetheretherketone (PEEK).
　絶縁基材４２には、前基材２及び後基材５と、複素誘電率に基づき定義される屈折率ｎが相互に整合する、又は、屈折率ｎが略同一或いは近接するものを用いると電磁波の透過性能向上の観点から好適である。前基材２及び後基材５と絶縁基材４２の近接する屈折率ｎの数値範囲としては、前基材２及び後基材５の屈折率と絶縁基材４２の屈折率との相違が０～１０％の範囲内となるようにすると良好である。尚、この屈折率ｎも比誘電率実数部εr'と比誘電率虚数部εr"から数式１として定義される量である。また、絶縁基材４２においても、透過性の観点から適用周波数における虚数部と実数部の比から数式２として定義される誘電正接（ロスタンジェント）tanδの大きさを０．１以下とすることが好ましい。 As the insulating base material 42, those having a refractive index n defined based on the complex permittivity of the front base material 2 and the rear base material 5 that match each other, or have substantially the same or close refractive index n are used. It is suitable from the viewpoint of improving the transmission performance of electromagnetic waves. The numerical range of the refractive index n close to the front base material 2 and the rear base material 5 and the insulating base material 42 is the difference between the refractive index of the front base material 2 and the rear base material 5 and the refractive index of the insulating base material 42. It is good to keep it in the range of 0 to 10%. The refractive index n is also a quantity defined as Equation 1 from the relative permittivity real part εr'and the relative permittivity imaginary part εr ". Further, also in the insulating base material 42, at the applicable frequency from the viewpoint of transparency. It is preferable that the size of the dielectric constant tan δ defined as Equation 2 from the ratio of the imaginary part and the real part is 0.1 or less.
　そして、レドーム１では、レドーム１を構成する電磁波透過性の樹脂体１０に、ヒーター部４１と共に、受電側制御部６１と受電コイル６２で構成されてヒーター部４１に電力を供給する無線受電ユニット６が埋め込んで設けられており、本例では、後基材５に無線受電ユニット６が埋め込んで設けられている（図２～図４参照）。また、本実施形態の車載レーダー装置用レドーム構造では、送電側制御部７１と送電コイル７２で構成される無線送電ユニット７が無線受電ユニット６と離間して対向配置されており、送電コイル７２と受電コイル６２が離間して対向配置されている。無線送電ユニット７の送電側制御部７１と送電コイル７２は樹脂封止体７０に封止され、送電側制御部７１は車体側制御装置８に接続コードで接続される（図３、図４参照）。　本実施形態における無線受電ユニット６及び無線送電ユニット７は、電磁誘導式無線給電の無線受電ユニット６及び無線送電ユニット７である。 Then, in the radome 1, the electromagnetic wave transmitting resin body 10 constituting the radome 1 is composed of a power receiving side control unit 61 and a power receiving coil 62 together with a heater unit 41, and a wireless power receiving unit 6 for supplying electric power to the heater unit 41. In this example, the wireless power receiving unit 6 is embedded in the rear base material 5 (see FIGS. 2 to 4). Further, in the radome structure for an in-vehicle radar device of the present embodiment, the wireless power transmission unit 7 composed of the power transmission side control unit 71 and the power transmission coil 72 is arranged opposite to the wireless power reception unit 6 so as to face the power transmission coil 72. The power receiving coils 62 are spaced apart from each other and arranged to face each other. The power transmission side control unit 71 and the power transmission coil 72 of the wireless power transmission unit 7 are sealed in a resin sealant 70, and the power transmission side control unit 71 is connected to the vehicle body side control device 8 with a connection cord (see FIGS. 3 and 4). ). The wireless power receiving unit 6 and the wireless power transmission unit 7 in the present embodiment are the wireless power receiving unit 6 and the wireless power transmission unit 7 of the electromagnetic induction type wireless power supply.
　無線受電ユニット６及び無線送電ユニット７の双方は、車載レーダー装置１００の電磁波照射領域Ｒ１、Ｒ２の外側に配置され、図示例では、無線受電ユニット６の受電コイル６２が樹脂体１０の電磁波透過領域に相当する電磁波照射領域Ｒ１の外側で電磁波照射領域Ｒ１を囲むように設けられ、この受電コイル６２と無線送電ユニット７の送電コイル７２が離間して対向配置されている（図１、図３参照）。受電コイル６２と送電コイル７２の離間距離は、樹脂体１０と樹脂封止体７０を隣接して接触配置する距離を下限とする。受電コイル６２と送電コイル７２の離間距離の上限は適用可能な範囲で適宜とすることが可能であるが、高効率に電力を供給する観点からは、受電コイル６２と送電コイル７２の軸方向と直交する平面における受電コイル６２のコイル径等の大きさと送電コイル７２のコイル径等の大きさのうち、最小のコイル径等の最小長さの１／２とすると好適である。例えば前述の直交平面における形状が楕円形の受電コイル６２と楕円形の送電コイル７２の場合、受電コイル６２の短径と送電コイル７２の短径のうち小さい方の短径の１／２とすると好適である。また、無線送電ユニット７を封止した樹脂封止体７０の電磁波照射領域Ｒ２と略対応する位置には開口７０１が形成されている。 Both the wireless power receiving unit 6 and the wireless power transmitting unit 7 are arranged outside the electromagnetic wave irradiation regions R1 and R2 of the vehicle-mounted radar device 100, and in the illustrated example, the power receiving coil 62 of the wireless power receiving unit 6 is the electromagnetic wave transmitting region of the resin body 10. It is provided so as to surround the electromagnetic wave irradiation region R1 on the outside of the electromagnetic wave irradiation region R1 corresponding to the above, and the power receiving coil 62 and the transmission coil 72 of the wireless power transmission unit 7 are arranged so as to face each other (see FIGS. 1 and 3). ). The lower limit of the separation distance between the power receiving coil 62 and the power transmission coil 72 is the distance at which the resin body 10 and the resin sealing body 70 are adjacently arranged in contact with each other. The upper limit of the separation distance between the power receiving coil 62 and the power transmitting coil 72 can be appropriately set within an applicable range, but from the viewpoint of supplying electric power with high efficiency, the axial direction of the power receiving coil 62 and the power transmitting coil 72 It is preferable that the size of the coil diameter or the like of the power receiving coil 62 and the size of the coil diameter or the like of the power transmitting coil 72 in the orthogonal planes are ½ of the minimum length such as the minimum coil diameter. For example, in the case of the power receiving coil 62 having an elliptical shape and the power transmitting coil 72 having an elliptical shape in the above-mentioned orthogonal plane, it is assumed that the minor axis of the power receiving coil 62 and the minor axis of the transmitting coil 72 are halved of the smaller minor axis. Suitable. Further, an opening 701 is formed at a position substantially corresponding to the electromagnetic wave irradiation region R2 of the resin sealing body 70 that seals the wireless power transmission unit 7.
　また、ヒーター部４１は、樹脂体１０の電磁波照射領域Ｒ１と略対応する位置に設けられており、ヒーター線で構成されるヒーター部４１は、レドーム１の外表面に略倣うようにして且つ電磁波透過領域に相当する電磁波照射領域Ｒ１を蛇行するようにして形成されている。無線受電ユニット６と無線送電ユニット７は、無線受電ユニット６の受電コイル６２の軸方向と無線送電ユニット７の送電コイル７２の軸方向がそれぞれヒーター部４１と略直交するようにして、配置されている（図１～図３参照）。 Further, the heater unit 41 is provided at a position substantially corresponding to the electromagnetic wave irradiation region R1 of the resin body 10, and the heater unit 41 composed of the heater wires substantially imitates the outer surface of the radome 1 and electromagnetic waves. It is formed so as to meander the electromagnetic wave irradiation region R1 corresponding to the transmission region. The wireless power receiving unit 6 and the wireless power transmission unit 7 are arranged so that the axial direction of the power receiving coil 62 of the wireless power receiving unit 6 and the axial direction of the power transmission coil 72 of the wireless power transmission unit 7 are substantially orthogonal to the heater unit 41, respectively. (See FIGS. 1 to 3).
　無線受電ユニット６は、図４（ａ）に示すように、受電側制御部６１と受電コイル６２で構成され、ヒーター部４１と電気的に接続されている。受電側制御部６１は、受電側制御回路６１１とレドーム１或いは樹脂体１０の温度を検出するセンサー６１２を有し、受電側制御回路６１１は、受電コイル６２に無電給電で供給された電力を制御してヒーター部４１に供給するようになっている。受電側制御回路６１１によるヒーター部４１への電力の供給制御では、例えばセンサー６１２で検知されるレドーム１或いは樹脂体１０の検知温度に応じて、受電側制御回路６１１に設定記憶されている所定の電力をヒーター部４１に供給するように制御する。 As shown in FIG. 4A, the wireless power receiving unit 6 is composed of a power receiving side control unit 61 and a power receiving coil 62, and is electrically connected to the heater unit 41. The power receiving side control unit 61 has a power receiving side control circuit 611 and a sensor 612 for detecting the temperature of the radome 1 or the resin body 10, and the power receiving side control circuit 611 controls the power supplied to the power receiving coil 62 without power supply. Then, it is supplied to the heater unit 41. In the power supply control to the heater unit 41 by the power receiving side control circuit 611, for example, a predetermined value set and stored in the power receiving side control circuit 611 according to the detection temperature of the radome 1 or the resin body 10 detected by the sensor 612. The electric power is controlled to be supplied to the heater unit 41.
　無線送電ユニット７は、図４（ｂ）に示すように、送電側制御部７１と送電コイル７２で構成され、車体側制御装置８に電気的に接続されている。送電側制御部７１は送電側制御回路７１１を有し、送電側制御回路７１１は、降雪等に車体側制御装置８から送られる制御指令及び電力により、送電コイル７２に電流を流し若しくは必要に応じて調整した電流を流し、電磁誘導式無線給電で無線受電ユニット６の受電コイル６２に電力を供給する。 As shown in FIG. 4B, the wireless power transmission unit 7 is composed of a power transmission side control unit 71 and a power transmission coil 72, and is electrically connected to the vehicle body side control device 8. The power transmission side control unit 71 has a power transmission side control circuit 711, and the power transmission side control circuit 711 causes a current to flow through the power transmission coil 72 or, if necessary, by a control command and electric power sent from the vehicle body side control device 8 to snowfall or the like. The adjusted current is passed, and power is supplied to the power receiving coil 62 of the wireless power receiving unit 6 by electromagnetic induction type wireless power supply.
　また、前述の無線受電ユニット６と無線送電ユニット７の無線給電に代え、無電受電ユニット６の受電側制御部６１に受電側制御回路６１１、センサー６１２、無線送電ユニット７との無線通信を担う通信部６１３を設け、無線送電ユニット７の送電側制御部７１に送電側制御回路７１１、無線受電ユニット６との無線通信を担う通信部７１２を設け、無線受電ユニット６の受電側制御回路６１１が、例えばセンサー６１２で検知されるレドーム１或いは樹脂体１０の検知温度に応じて通信部６１３を介して検知温度を無線送電ユニット７に送信し、無線送電ユニット７の送電側制御回路７１１が通信部７１２を介して検知温度を受信し、受信した検知温度に応じて送電側制御回路７１１に設定記憶されている所定の電流値に調整して送電コイル７２に電流を流し、電磁誘導式無線給電で無線受電ユニット６の受電コイル６２に電力を供給するようにしても良好である。 Further, instead of the wireless power supply of the wireless power receiving unit 6 and the wireless power transmission unit 7 described above, the power receiving side control unit 61 of the non-power receiving unit 6 is responsible for wireless communication with the power receiving side control circuit 611, the sensor 612, and the wireless power transmission unit 7. A unit 613 is provided, a transmission side control circuit 711 is provided in the transmission side control unit 71 of the wireless transmission unit 7, a communication unit 712 is provided for wireless communication with the wireless power receiving unit 6, and the power receiving side control circuit 611 of the wireless power receiving unit 6 is provided. For example, the detected temperature is transmitted to the wireless transmission unit 7 via the communication unit 613 according to the detection temperature of the redome 1 or the resin body 10 detected by the sensor 612, and the transmission side control circuit 711 of the wireless transmission unit 7 transmits the communication unit 712. The detected temperature is received via the above, adjusted to the predetermined current value set and stored in the transmission side control circuit 711 according to the received detection temperature, and the current is passed through the transmission coil 72, and wirelessly by electromagnetic induction type wireless power supply. It is also good to supply power to the power receiving coil 62 of the power receiving unit 6.
　尚、上記例では、電磁誘導式無線給電の無線受電ユニット６及び無線送電ユニット７の双方を車載レーダー装置１００の電磁波照射領域Ｒ１、Ｒ２の外側に配置する構成として、無線受電ユニット６の受電コイル６２を樹脂体１０の電磁波照射領域Ｒ１の外側で電磁波照射領域Ｒ１を囲むように設ける構成について説明したが、例えば図５に示すように、受電側制御部６１ｍと共に無線受電ユニット６ｍを構成する受電コイル６２ｍを樹脂体１０の電磁波照射領域Ｒ１の外側の複数領域（図示例では左右２つの領域）でそれぞれ巻回するように設け、送電側制御部７１ｍと共に無線送電ユニット７ｍを構成する送電コイル７２ｍを電磁波照射領域Ｒ２の外側の複数領域（図示例では左右２つの領域）でそれぞれ巻回するように設け、無線受電ユニット６ｍの受電コイル６２ｍと無線送電ユニット７ｍの送電コイル７２ｍを離間して対向配置するようにしても良好である。この場合も受電コイル６２ｍと送電コイル７２ｍの離間距離は、上述の受電コイル６２と送電コイル７２の離間距離と同様に設定すると好適である。 In the above example, both the wireless power receiving unit 6 and the wireless power transmission unit 7 of the electromagnetic induction type wireless power supply are arranged outside the electromagnetic wave irradiation regions R1 and R2 of the in-vehicle radar device 100, and the power receiving coil of the wireless power receiving unit 6 is arranged. The configuration in which the 62 is provided so as to surround the electromagnetic wave irradiation region R1 outside the electromagnetic wave irradiation region R1 of the resin body 10 has been described. For example, as shown in FIG. 5, the power receiving unit 6m is configured together with the power receiving side control unit 61m. The coil 62m is provided so as to be wound around a plurality of regions (two regions on the left and right in the illustrated example) outside the electromagnetic wave irradiation region R1 of the resin body 10, and the transmission coil 72m constituting the wireless transmission unit 7m together with the transmission side control unit 71m. Are provided so as to be wound around each of a plurality of regions (two regions on the left and right in the illustrated example) outside the electromagnetic wave irradiation region R2, and the power receiving coil 62 m of the wireless power receiving unit 6 m and the power transmission coil 72 m of the wireless power transmission unit 7 m are separated from each other. It is also good to arrange it. In this case as well, it is preferable that the separation distance between the power receiving coil 62m and the power transmission coil 72m is set in the same manner as the separation distance between the power reception coil 62 and the power transmission coil 72 described above.
　また、電磁誘導式無線給電の無線受電ユニット６及び無線送電ユニット７の双方を車載レーダー装置１００の電磁波照射領域Ｒ１、Ｒ２の外側に配置する構成の別例として、図６に示すように、受電側制御部６１ｎと受電コイル６２ｎから構成される無線受電ユニット６ｎと、送電側制御部７１ｎと送電コイル７２ｎから構成される無線送電ユニット７ｎの組み合わせを複数組（図示例では２組）設置するようにしても良好である。この場合も受電コイル６２ｎと送電コイル７２ｎの離間距離は、上述の受電コイル６２と送電コイル７２の離間距離と同様に設定すると好適である。 Further, as another example of the configuration in which both the wireless power receiving unit 6 and the wireless power transmission unit 7 of the electromagnetic induction type wireless power supply are arranged outside the electromagnetic wave irradiation regions R1 and R2 of the in-vehicle radar device 100, as shown in FIG. A plurality of sets (two sets in the illustrated example) of a wireless power receiving unit 6n composed of a side control unit 61n and a power receiving coil 62n and a wireless power transmission unit 7n composed of a power transmission side control unit 71n and a power transmission coil 72n are installed. Even so, it is good. In this case as well, it is preferable that the separation distance between the power receiving coil 62n and the power transmission coil 72n is set in the same manner as the separation distance between the power reception coil 62 and the power transmission coil 72 described above.
　第１実施形態の車載レーダー装置用レドーム構造によれば、レドーム１を構成する電磁波透過性の樹脂体１０に埋め込まれる無線受電ユニット６、６ｍ、６ｎに樹脂封止された無線送電ユニット７、７ｍ、７ｎで無線給電し、ヒーター部４１に電力を供給することができることから、レドームのヒーター側コネクタと車両側コネクタの機械的、電気的な結合箇所自体、及びこの結合箇所に対する別の防水部材で防水処理を行う必要を無くすことができる。従って、製造コストの低減、製造効率の向上を図ることができる。また、レドーム１の無線受電ユニット６、６ｍ、６ｎが樹脂体１０に埋め込まれることに加え、レドーム１と離間する無線送電ユニット７、７ｍ、７ｎが樹脂封止体７０に封止されることから、車両洗車時や雨天時等に対する所要の防水性を確実に確保することができる。また、無線送電ユニット７、７ｍ、７ｎと無線受電ユニット６、６ｍ、６ｎは所要の無線給電を行える範囲で離間して対向配置すれば、自由に配置できることから、ヒーター部４１に対する電力供給部品の配置の自由度を高めることができる。また、レドームのヒーター側コネクタと車両側コネクタを機械的、電気的に結合する場合には、結合、接合箇所の機械的疲労、断線が生ずるリスクが生ずるが、このような結合、接合箇所の機械的疲労、断線リスクを無くすことができる。 According to the radome structure for an in-vehicle radar device of the first embodiment, the wireless power transmission units 7, 7 m, which are resin-sealed in the wireless power receiving units 6, 6 m, 6n embedded in the electromagnetic wave transmitting resin body 10 constituting the radome 1. Since it is possible to wirelessly supply power with 7n and supply power to the heater unit 41, the mechanical and electrical connection points of the heater side connector of the radome and the vehicle side connector themselves, and another waterproof member for this connection point can be used. It is possible to eliminate the need for waterproofing. Therefore, it is possible to reduce the manufacturing cost and improve the manufacturing efficiency. Further, since the wireless power receiving units 6, 6m, 6n of the radome 1 are embedded in the resin body 10, and the wireless power transmission units 7, 7m, 7n separated from the radome 1 are sealed in the resin sealing body 70. , The required waterproofness can be reliably ensured when the vehicle is washed or when it rains. Further, since the wireless power transmission units 7, 7m, 7n and the wireless power receiving units 6, 6m, 6n can be freely arranged if they are separated from each other within a range in which the required wireless power supply can be performed, they can be freely arranged. The degree of freedom of placement can be increased. In addition, when the heater side connector of the radome and the vehicle side connector are mechanically and electrically connected, there is a risk of connection, mechanical fatigue of the joint, and disconnection. It is possible to eliminate the risk of physical fatigue and disconnection.
　また、無線受電ユニット６、６ｍ、６ｎ及び無線送電ユニット７、７ｍ、７ｎの双方を車載レーダー装置１００の電磁波照射領域Ｒ１、Ｒ２の外側に配置し、ヒーター部４１を電磁波照射領域Ｒ１と略対応する位置に設けることにより、無線受電ユニット６、６ｍ、６ｎ及び無線送電ユニット７、７ｍ、７ｎが車載レーダー装置１００の電磁波透過を低下させることを防止することができる。また、車載レーダー装置１００の電磁波照射領域Ｒ１についてレドーム１の外表面に付着した雪や氷を確実に融雪することができる。 Further, both the wireless power receiving units 6, 6m and 6n and the wireless power transmitting units 7, 7m and 7n are arranged outside the electromagnetic wave irradiation areas R1 and R2 of the in-vehicle radar device 100, and the heater unit 41 substantially corresponds to the electromagnetic wave irradiation area R1. By providing the wireless power receiving units 6, 6m, 6n and the wireless power transmitting units 7, 7m, 7n, it is possible to prevent the electromagnetic wave transmission of the in-vehicle radar device 100 from being lowered. Further, it is possible to reliably melt the snow and ice adhering to the outer surface of the radome 1 in the electromagnetic wave irradiation region R1 of the vehicle-mounted radar device 100.
　また、無線受電ユニット６、６ｍ、６ｎの受電コイル６２、６２ｍ、６２ｎの軸方向と無線送電ユニット７、７ｍ、７ｎの送電コイル７２、７２ｍ、７２ｎの軸方向がそれぞれヒーター部４１と略直交するようにして、無線受電ユニット６、６ｍ、６ｎ及び無線送電ユニット７、７ｍ、７ｎを配置することにより、電磁誘導式無線給電でヒーター部４１に融雪に必要な電力を効率的に供給し、ヒーター部４１を省電力で効率的に加熱することができる。また、車載レーダー装置１００のレーダーの電磁波であるミリ波と、電磁誘導式無線給電で用いる電磁波は通常、周波数が大きく異なるため、ミリ波と干渉せず、車載レーダー装置１００の機能を良好に発揮させることができる。 Further, the axial directions of the power receiving coils 62, 62m, 62n of the wireless power receiving units 6, 6m, 6n and the axial directions of the power transmission coils 72, 72m, 72n of the wireless power transmission units 7, 7m, 7n are substantially orthogonal to the heater unit 41, respectively. By arranging the wireless power receiving units 6, 6m, 6n and the wireless power transmission units 7, 7m, 7n in this way, the electric power required for snow melting is efficiently supplied to the heater unit 41 by the electromagnetic induction type wireless power supply, and the heater. The unit 41 can be efficiently heated with low power consumption. Further, since the millimeter wave, which is the electromagnetic wave of the radar of the in-vehicle radar device 100, and the electromagnetic wave used in the electromagnetic induction type wireless power supply usually have a large frequency difference, they do not interfere with the millimeter wave, and the function of the in-vehicle radar device 100 is exhibited well. Can be made to.
　また、無線受電ユニット６の受電コイル６２を樹脂体１０の電磁波照射領域Ｒ１の外側で電磁波照射領域Ｒ１を囲むように設けることにより、無線受電ユニット６及び無線送電ユニット７が車載レーダー装置１００の電磁波透過を低下させることを防止することができる。また、受電コイル６２と送電コイル７２の巻径を電磁波照射領域Ｒ１を外側から囲む大きな径にして、ヒーター部４１の融雪に必要な電力を確実に供給することができる。また、電磁波照射領域Ｒ１の外側のスペースを有効活用して受電コイル６２及び対応する送電コイル７２を設置することが可能であり、例えば樹脂体１０が電磁波照射領域Ｒ１の外側に局所的に大きく突出するようなレドーム形状になることを防止することができ、レドーム１の外観形状の美観を確保することができる。 Further, by providing the power receiving coil 62 of the wireless power receiving unit 6 so as to surround the electromagnetic wave irradiation region R1 outside the electromagnetic wave irradiation region R1 of the resin body 10, the wireless power receiving unit 6 and the wireless power transmission unit 7 are provided with the electromagnetic waves of the in-vehicle radar device 100. It is possible to prevent the transmission from being lowered. Further, the winding diameters of the power receiving coil 62 and the power transmission coil 72 can be made large in diameter surrounding the electromagnetic wave irradiation region R1 from the outside, so that the electric power required for snow melting of the heater unit 41 can be reliably supplied. Further, it is possible to effectively utilize the space outside the electromagnetic wave irradiation region R1 to install the power receiving coil 62 and the corresponding power transmission coil 72. For example, the resin body 10 greatly protrudes locally to the outside of the electromagnetic wave irradiation region R1. It is possible to prevent the radome shape from becoming such a shape, and it is possible to secure the aesthetic appearance of the radome 1.
　また、無線受電ユニット６ｍの受電コイル６２ｍを樹脂体１０の電磁波照射領域Ｒ１の外側の複数領域でそれぞれ巻回して設けることにより、無線受電ユニット６ｍ及び無線送電ユニット７ｍが車載レーダー装置１００の電磁波透過を低下させることを防止することができる。また、複数領域でそれぞれ巻回された受電コイル６ｍと送電コイル７ｍを対向配置することにより、複数領域における各領域の受電コイル６ｍと送電コイル７ｍの巻径を小さくしても、ヒーター部４１の融雪に必要な電力を確実に供給することができる。また、複数領域における各領域の受電コイル６ｍと送電コイル７ｍの巻径を小さくすることが可能であるから、例えば巻径の大きな受電コイルが埋め込まれて樹脂体１０が電磁波照射領域Ｒ１の外側に局所的に大きく突出するようなレドーム形状になることを防止することができ、レドーム１の外観形状の美観を確保することができる。 Further, by winding the power receiving coil 62m of the wireless power receiving unit 6m around a plurality of regions outside the electromagnetic wave irradiation region R1 of the resin body 10, the wireless power receiving unit 6m and the wireless power transmission unit 7m transmit the electromagnetic wave of the in-vehicle radar device 100. Can be prevented from being lowered. Further, by arranging the power receiving coil 6m and the power transmission coil 7m wound in the plurality of regions so as to face each other, even if the winding diameters of the power receiving coil 6m and the power transmission coil 7m in each region in the plurality of regions are reduced, the heater unit 41 can be used. The power required for snow melting can be reliably supplied. Further, since it is possible to reduce the winding diameters of the power receiving coil 6 m and the power transmission coil 7 m in each region in a plurality of regions, for example, a power receiving coil having a large winding diameter is embedded and the resin body 10 is placed outside the electromagnetic wave irradiation region R1. It is possible to prevent the radome shape from being formed so as to protrude greatly locally, and it is possible to secure the aesthetic appearance of the appearance shape of the radome 1.
　また、電磁誘導式無線給電の無線受電ユニット６ｎと無線送電ユニット７ｎの組み合わせを複数組設置することにより、無線受電ユニット６ｎ及び無線送電ユニット７ｎが車載レーダー装置１００の電磁波透過を低下させることを防止することができる。また、電磁誘導式無線給電の無線受電ユニット６ｎ及び無線送電ユニット７ｎの組み合わせを複数組設置することにより、各々の受電コイル６ｎと送電コイル７ｎの巻径を小さくしても、ヒーター部４１の融雪に必要な電力を確実に供給することができる。また、各々の受電コイル６ｎと送電コイル７ｎの巻径を小さくすることが可能であるから、例えば巻径の大きな受電コイルが埋め込まれて樹脂体１０が電磁波照射領域Ｒ１の外側に局所的に大きく突出するようなレドーム形状になることを防止することができ、レドーム１の外観形状の美観を確保することができる。 Further, by installing a plurality of combinations of the electromagnetic induction type wireless power feeding wireless power receiving unit 6n and the wireless power transmitting unit 7n, it is possible to prevent the wireless power receiving unit 6n and the wireless power transmitting unit 7n from reducing the electromagnetic wave transmission of the in-vehicle radar device 100. can do. Further, by installing a plurality of combinations of the wireless power receiving unit 6n and the wireless power transmission unit 7n of the electromagnetic induction type wireless power supply, even if the winding diameter of each power receiving coil 6n and the power transmission coil 7n is reduced, the snow melting of the heater unit 41 The necessary power can be reliably supplied. Further, since it is possible to reduce the winding diameter of each of the power receiving coil 6n and the power transmission coil 7n, for example, a power receiving coil having a large winding diameter is embedded and the resin body 10 is locally large outside the electromagnetic wave irradiation region R1. It is possible to prevent the radome shape from protruding, and it is possible to secure the aesthetic appearance of the radome 1.
　また、無線送電ユニット７、７ｍ、７ｎを封止した樹脂封止体７０の電磁波照射領域Ｒ２と略対応する位置に開口７０１を形成することにより、車載レーダー装置１００から照射した電磁波を樹脂封止体７０の内部を通過させずにレドームに照射することができ、レドーム構造全体における車載レーダー装置１００の電磁波透過性を最大限に高めることができる。また、車載レーダー装置１００の電磁波が樹脂封止体７０の内部を通過しないことから、車載レーダー装置１００の電磁波に対する電磁波透過性に拘束されない材料を樹脂封止体７０に用いることができ、樹脂封止体７０に使用可能な材料の自由度を高めることができる。 Further, by forming an opening 701 at a position substantially corresponding to the electromagnetic wave irradiation region R2 of the resin encapsulating body 70 that encloses the wireless transmission units 7, 7m, and 7n, the electromagnetic wave emitted from the in-vehicle radar device 100 is resin-sealed. The radome can be irradiated without passing through the inside of the body 70, and the electromagnetic wave transmission of the in-vehicle radar device 100 in the entire radome structure can be maximized. Further, since the electromagnetic wave of the vehicle-mounted radar device 100 does not pass through the inside of the resin-sealed body 70, a material that is not constrained by the electromagnetic wave transmission of the vehicle-mounted radar device 100 to the electromagnetic wave can be used for the resin-sealed body 70, and the resin-sealed body 70 can be used. The degree of freedom of the material that can be used for the stop body 70 can be increased.
　〔本明細書開示発明の包含範囲〕
　本明細書開示の発明は、発明として列記した各発明、実施形態の他に、適用可能な範囲で、これらの部分的な内容を本明細書開示の他の内容に変更して特定したもの、或いはこれらの内容に本明細書開示の他の内容を付加して特定したもの、或いはこれらの部分的な内容を部分的な作用効果が得られる限度で削除して上位概念化して特定したものを包含する。そして、本明細書開示の発明には下記変形例や追記した内容も含まれる。 [Scope of inclusion of the invention disclosed herein]
The invention disclosed in the present specification is specified by changing the partial contents thereof to other contents disclosed in the present specification to the extent applicable, in addition to the inventions and embodiments listed as inventions. Alternatively, those specified by adding other contents disclosed in the present specification to these contents, or those specified by deleting these partial contents to the extent that a partial action and effect can be obtained and making them into a higher concept. Include. The invention disclosed in the present specification also includes the following modifications and additional contents.
　例えば第１実施形態における無線送電ユニット７を樹脂封止する樹脂封止体７０は略中央に開口７０１が形成され、開口７０１内に車載レーダー装置１００の電磁波照射領域Ｒ２が配置される構成としたが、本発明では、無線送電ユニット７を樹脂封止する樹脂封止体に開口を設けずに、車載レーダー装置１００の電磁波がこの樹脂封止体を透過する構成とすることも可能である。 For example, the resin encapsulant 70 for resin-sealing the wireless power transmission unit 7 in the first embodiment has an opening 701 formed substantially in the center, and the electromagnetic wave irradiation region R2 of the in-vehicle radar device 100 is arranged in the opening 701. However, in the present invention, it is also possible to configure the electromagnetic wave of the in-vehicle radar device 100 to pass through the resin encapsulation body without providing an opening in the resin encapsulation body that encloses the wireless power transmission unit 7 with the resin.
　また、本発明の車載レーダー装置用レドーム構造を電磁誘導式無線給電とする場合の送電コイル、受電コイルは、例えばリッツ線、ＦＰＣコイル、ワイヤー線等で適宜の好ましいものを用いて構成することが可能であり、例えば大きな電流が流れる送電コイルには細線を束ねたリッツ線を用いると好適であり、又、受電コイルには、コイルの厚みを薄くすることが容易で、且つヒーター部や受電側制御部との一体化が容易なＦＰＣコイルを用いると好適である。尚、送電コイルと受電コイルの形状や大きさは、本発明の趣旨の範囲内で相違させることが可能である。 Further, the transmission coil and the power receiving coil when the radome structure for the in-vehicle radar device of the present invention is used for electromagnetic induction wireless power feeding may be configured by using, for example, a litz wire, an FPC coil, a wire wire or the like, which are appropriately preferable. It is possible, for example, it is preferable to use a litz wire in which fine wires are bundled for a transmission coil through which a large current flows, and for the power receiving coil, it is easy to reduce the thickness of the coil, and the heater portion and the power receiving side are used. It is preferable to use an FPC coil that can be easily integrated with the control unit. The shapes and sizes of the power transmission coil and the power reception coil can be different within the scope of the present invention.
　また、本発明の車載レーダー装置用レドーム構造における無線給電は、本発明の趣旨の範囲内で電磁誘導式無線給電以外のものを適用することも可能であり、例えば電解結合式無線給電の無線受電ユニット及び無線送電ユニットを用い、この無線受電ユニットを樹脂体に、無線送電ユニットを樹脂封止体に埋め込んで樹脂封止するように設ける構成、更には、電解結合式無線給電の複数の無線受電ユニット及び無線送電ユニットの組み合わせを設置する構成とすることが可能である。 Further, as the wireless power supply in the radome structure for the vehicle-mounted radar device of the present invention, it is possible to apply other than the electromagnetic induction type wireless power supply within the scope of the present invention, for example, the wireless power reception of the electrolytic coupling type wireless power supply. Using a unit and a wireless power transmission unit, this wireless power receiving unit is embedded in a resin body, and the wireless power transmitting unit is embedded in a resin sealing body to be resin-sealed. It is possible to install a combination of the unit and the wireless transmission unit.
　また、上記実施形態における前基材２の外表面など本発明の車載レーダー装置用レドームの樹脂体の外表面に、例えばエポキシポリウレタン系防水化材、ポリエステル系防水化材、シリコン系防水化材、アクリル系防水化材、メタクリル系防水化材、チタニア系防水化材のような材料の電磁波透過性の防水層を積層するように固着して設け、防水性を高める構成、或いは例えばアクリル系撥水化材、シリコン系撥水化材のような材料の電磁波透過性の撥水層を積層する、あるいは、撥水性のナノ構造を表面に付与するように固着して設け、撥水性を高める構成 、或いは樹脂体の外表面に防水層と撥水層の順に積層し、固着して設け、撥水性と防水性の双方を高める構成としても良好である。また、上記実施形態における前基材２の外表面など本発明の車載レーダー装置用レドームの樹脂体の外表面に、例えばメラミン系ハードコート剤、ウレタン系ハードコート材、アクリル系ハードコート材等の有機系ハードコート材、シリコン系ハードコート材、無機系ハードコート材のような材料の電磁波透過性のハードコート層を積層するように固着して設け、樹脂体の外表面を保護し、レドームの強度や耐久性を高める構成としても良好である。また、上記実施形態における前基材２の外表面など本発明の車載レーダー装置用レドームの樹脂体の外表面に、例えば有機系親水材、シラン系親水化材、チタニア系親水化材のような材料の電磁波透過性の親水層を積層するように固着して設ける、あるいは親水性のナノ構造を表面に付与することで、融解された雪を水としてレドーム表面に留め、水の潜熱を利用して新たに雪が付着するのを防止する構成としても良好である。 Further, on the outer surface of the resin body of the radome for an in-vehicle radar device of the present invention, such as the outer surface of the front base material 2 in the above embodiment, for example, an epoxy polyurethane waterproofing material, a polyester waterproofing material, a silicon waterproofing material, etc. A structure in which an electromagnetic wave-permeable waterproof layer of a material such as an acrylic waterproofing material, a methacrylic waterproofing material, or a titania waterproofing material is fixedly provided so as to be laminated to enhance waterproofness, or, for example, acrylic water repellent. A structure that enhances water repellency by laminating an electromagnetic wave-permeable water-repellent layer of a material such as a chemical material or a silicon-based water-repellent material, or by fixing and providing a water-repellent nanostructure so as to be imparted to the surface. Alternatively, a waterproof layer and a water-repellent layer are laminated in this order on the outer surface of the resin body and fixedly provided to enhance both water repellency and waterproofness. Further, on the outer surface of the resin body of the red dome for an in-vehicle radar device of the present invention, such as the outer surface of the front base material 2 in the above embodiment, for example, a melamine-based hard coating agent, a urethane-based hard coating material, an acrylic-based hard coating material, etc. An electromagnetically permeable hard coat layer of a material such as an organic hard coat material, a silicon hard coat material, or an inorganic hard coat material is fixedly provided so as to be laminated to protect the outer surface of the resin body and to protect the outer surface of the resin body. It is also good as a configuration that enhances strength and durability. Further, on the outer surface of the resin body of the radome for an in-vehicle radar device of the present invention, such as the outer surface of the front base material 2 in the above embodiment, for example, an organic hydrophilic material, a silane-based hydrophilic material, a titania-based hydrophilic material, etc. By fixing and providing a hydrophilic layer of the material that is permeable to electromagnetic waves so as to be laminated, or by imparting a hydrophilic nanostructure to the surface, the melted snow is retained on the surface of the radome as water, and the latent heat of the water is used. It is also good as a configuration to prevent new snow from adhering.
　本発明は、車載レーダー装置用レドームの構造として利用することができる。 The present invention can be used as a structure of a radome for an in-vehicle radar device.
１…車載レーダー装置用レドーム　２…前基材　２１…凹部　３…加飾層　３１…電磁波透過性金属部　３２…有色部　３３…背面　４…ヒーター層　４１…ヒーター部　４２…絶縁基材　５…後基材　６、６ｍ、６ｎ…無線受電ユニット　６１、６１ｍ、６１ｎ…受電側制御部　６１１…受電側制御回路　６１２…センサー　６１３…通信部　６２、６２ｍ、６２ｎ…受電コイル　７、７ｍ、７ｎ…無線送電ユニット　７１、７１ｍ、７１ｎ…送電側制御部　７１１…送電側制御回路　７１２…通信部　７２、７２ｍ、７２ｎ…送電コイル　７０…樹脂封止体　７０１…開口　８…車体側制御装置　１０…樹脂体　１００…車載レーダー装置　Ｍ…マーク記号部　Ｒ１、Ｒ２…電磁波照射領域
  1 ... Redome for in-vehicle radar equipment 2 ... Front base material 21 ... Recess 3 ... Decorative layer 31 ... Electromagnetic wave transmission metal part 32 ... Colored part 33 ... Back side 4 ... Heater layer 41 ... Heater part 42 ... Insulation base material 5 ... Rear Base material 6, 6m, 6n ... Wireless power receiving unit 61, 61m, 61n ... Power receiving side control unit 611 ... Power receiving side control circuit 612 ... Sensor 613 ... Communication unit 62, 62m, 62n ... Power receiving coil 7, 7m, 7n ... Wireless power transmission Unit 71, 71m, 71n ... Power transmission side control unit 711 ... Power transmission side control circuit 712 ... Communication unit 72, 72m, 72n ... Power transmission coil 70 ... Resin encapsulation 701 ... Opening 8 ... Body side control device 10 ... Resin body 100 ... In-vehicle radar device M ... Mark symbol part R1, R2 ... Electromagnetic wave irradiation area

Claims (7)

  1. 　レドームを構成する電磁波透過性の樹脂体にヒーター部、前記ヒーター部に電力を供給する無線受電ユニットが埋め込んで設けられ、
    　無線送電ユニットが前記無線受電ユニットと離間して対向配置され、
    　前記無線送電ユニットが樹脂封止体に封止されていることを特徴とする車載レーダー装置用レドーム構造。     A heater unit and a wireless power receiving unit that supplies electric power to the heater unit are embedded in an electromagnetic wave-transmitting resin body that constitutes a radome.
    The wireless power transmission unit is arranged so as to face the wireless power receiving unit so as to be separated from the wireless power receiving unit.
    A radome structure for an in-vehicle radar device, wherein the wireless power transmission unit is sealed in a resin sealant.
  2. 　前記無線受電ユニット及び前記無線送電ユニットの双方が車載レーダー装置の電磁波照射領域の外側に配置され、
    　前記ヒーター部が前記電磁波照射領域と略対応する位置に設けられていることを特徴とする請求項１記載の車載レーダー装置用レドーム構造。     Both the wireless power receiving unit and the wireless power transmission unit are arranged outside the electromagnetic wave irradiation area of the in-vehicle radar device.
    The radome structure for an in-vehicle radar device according to claim 1, wherein the heater portion is provided at a position substantially corresponding to the electromagnetic wave irradiation region.
  3. 　前記無線受電ユニット及び前記無線送電ユニットが電磁誘導式無線給電の前記無線受電ユニット及び前記無線送電ユニットであり、
    　前記無線受電ユニットの受電コイルの軸方向と前記無線送電ユニットの送電コイルの軸方向がそれぞれ前記ヒーター部と略直交するようにして、前記無線受電ユニット及び前記無線送電ユニットが配置されることを特徴とする請求項１又は２記載の車載レーダー装置用レドーム構造。     The wireless power receiving unit and the wireless power transmission unit are the wireless power receiving unit and the wireless power transmission unit of electromagnetic induction type wireless power supply.
    The wireless power receiving unit and the wireless power transmission unit are arranged so that the axial direction of the power receiving coil of the wireless power receiving unit and the axial direction of the power transmitting coil of the wireless power transmission unit are substantially orthogonal to the heater unit. The radome structure for an in-vehicle radar device according to claim 1 or 2.
  4. 　電磁誘導式無線給電の前記無線受電ユニット及び前記無線送電ユニットの双方が車載レーダー装置の電磁波照射領域の外側に配置されると共に、
    　前記無線受電ユニットの受電コイルが前記樹脂体の前記電磁波照射領域の外側で前記電磁波照射領域を囲むように設けられ、
    　前記無線送電ユニットの送電コイルが前記受電コイルと離間して対向配置されていることを特徴とする請求項３記載の車載レーダー装置用レドーム構造。     Both the wireless power receiving unit and the wireless power transmission unit of the electromagnetic induction type wireless power supply are arranged outside the electromagnetic wave irradiation area of the in-vehicle radar device, and are also arranged.
    The power receiving coil of the wireless power receiving unit is provided so as to surround the electromagnetic wave irradiation region outside the electromagnetic wave irradiation region of the resin body.
    The radome structure for an in-vehicle radar device according to claim 3, wherein the power transmission coil of the wireless power transmission unit is arranged so as to be separated from the power reception coil.
  5. 　電磁誘導式無線給電の前記無線受電ユニット及び前記無線送電ユニットの双方が車載レーダー装置の電磁波照射領域の外側に配置されると共に、
    　前記無線受電ユニットの受電コイルが前記樹脂体の前記電磁波照射領域の外側の複数領域でそれぞれ巻回されるように設けられ、
    　前記無線送電ユニットの送電コイルが前記受電コイルと離間して対向配置されていることを特徴とする請求項３記載の車載レーダー装置用レドーム構造。     Both the wireless power receiving unit and the wireless power transmission unit of the electromagnetic induction type wireless power supply are arranged outside the electromagnetic wave irradiation area of the in-vehicle radar device, and are also arranged.
    The power receiving coil of the wireless power receiving unit is provided so as to be wound in a plurality of regions outside the electromagnetic wave irradiation region of the resin body.
    The radome structure for an in-vehicle radar device according to claim 3, wherein the power transmission coil of the wireless power transmission unit is arranged so as to be separated from the power reception coil.
  6. 　電磁誘導式無線給電の前記無線受電ユニット及び前記無線送電ユニットの双方が車載レーダー装置の電磁波照射領域の外側に配置されると共に、
    　電磁誘導式無線給電の前記無線受電ユニット及び前記無線送電ユニットの組み合わせが複数組設置されることを特徴とする請求項３記載の車載レーダー装置用レドーム構造。     Both the wireless power receiving unit and the wireless power transmission unit of the electromagnetic induction type wireless power supply are arranged outside the electromagnetic wave irradiation area of the in-vehicle radar device, and are also arranged.
    The radome structure for an in-vehicle radar device according to claim 3, wherein a plurality of combinations of the wireless power receiving unit and the wireless power transmission unit of the electromagnetic induction type wireless power supply are installed.
  7. 　前記無線送電ユニットを封止した前記樹脂封止体の前記電磁波照射領域と略対応する位置に開口が形成されていることを特徴とする請求項３～６の何れかに記載の車載レーダー装置用レドーム構造。
          The vehicle-mounted radar device according to any one of claims 3 to 6, wherein an opening is formed at a position substantially corresponding to the electromagnetic wave irradiation region of the resin-sealed body in which the wireless power transmission unit is sealed. Radome structure.
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JPH10163739A (en) * 1996-11-29 1998-06-19 Nec Corp Radio equipment having plane antenna with foldable parasitic element face
JP2016158367A (en) * 2015-02-24 2016-09-01 株式会社デンソー Non-contact power feeding apparatus
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