WO2013177756A1 - 一种雷达保护罩及其制造方法 - Google Patents

一种雷达保护罩及其制造方法 Download PDF

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Publication number
WO2013177756A1
WO2013177756A1 PCT/CN2012/076250 CN2012076250W WO2013177756A1 WO 2013177756 A1 WO2013177756 A1 WO 2013177756A1 CN 2012076250 W CN2012076250 W CN 2012076250W WO 2013177756 A1 WO2013177756 A1 WO 2013177756A1
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WO
WIPO (PCT)
Prior art keywords
front cover
layer
radar
thickness
coating
Prior art date
Application number
PCT/CN2012/076250
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English (en)
French (fr)
Inventor
钱苗根
Original Assignee
湖州赫特金泰汽车零部件有限公司
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 湖州赫特金泰汽车零部件有限公司 filed Critical 湖州赫特金泰汽车零部件有限公司
Priority to PCT/CN2012/076250 priority Critical patent/WO2013177756A1/zh
Publication of WO2013177756A1 publication Critical patent/WO2013177756A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome

Definitions

  • the present invention relates to a radar protective cover suitable for use in a radar system of a motor vehicle; and a method of manufacturing the radar protective cover.
  • Automotive radar is a radar used in cars or other ground motor vehicles. It includes a variety of different radars based on different technologies (such as laser, ultrasonic, microwave, millimeter wave) with different functions (such as finding obstacles, predicting collisions, adaptive cruise control). The specific uses and structures of various radars are different, but the basic forms are consistent, including: transmitters, transmitting antennas, receivers, receiving antennas, processing parts and displays, as well as power equipment, data acquisition equipment, anti-jamming equipment. And other auxiliary equipment.
  • technologies such as laser, ultrasonic, microwave, millimeter wave
  • functions such as finding obstacles, predicting collisions, adaptive cruise control.
  • the specific uses and structures of various radars are different, but the basic forms are consistent, including: transmitters, transmitting antennas, receivers, receiving antennas, processing parts and displays, as well as power equipment, data acquisition equipment, anti-jamming equipment. And other auxiliary equipment.
  • the principle is that the transmitter of the radar device transmits the electromagnetic wave energy to a certain direction of the space through the antenna, and the object in the direction reflects the electromagnetic wave that is touched; the radar antenna receives the reflected wave, and sends it to the receiving device for processing, extracting the relevant Some information about the object.
  • the radar protective cover is a kind of protection device for protecting the car radar antenna in the cover.
  • the protective cover not only prevents the impact of the gravel, but also protects the radar and the antenna from external damage, ensures the normal operation of the radar under various conditions, and improves the service life of the radar. And minimize the impact on the electromagnetic properties of the radar antenna.
  • Configuring the radome is an important measure to eliminate the effects of environmental loads such as wind, sand, rain and snow, improve working conditions, and improve the reliability of the radar antenna and even the whole machine. Cover the antenna or "radar head" with a radome to protect it from wind, sand, rain, etc. The environment is damaged, while the electromagnetic waves are kept “transparent", so that the radar function can be fully utilized.
  • a radome for an automotive radar system and a method of manufacturing the same are disclosed in the prior art, for example, the patent EP 1 750 329 A1, in which an insulating lens is mounted on the first contact surface of the radome, and the insulating lens on the radome can be bonded Connected or soldered to the contact surface of the radome.
  • This patent is mainly used to solve the problem of large space occupied by existing automotive radar systems.
  • the patents JP2000159039A and JP200049522A each disclose a covering portion of a beam path of a radar device, the outer surface of the plastic covering member having a thin metal layer composed of indium and a protective layer formed on a thin metal layer composed of indium,
  • the protective cover has a metallic luster from the outside but does not interfere with the thunder Play the role.
  • the surface of the covering member is flat and the color tone is single, which restricts the selection of the protective cover formed at various angular positions of the vehicle body.
  • the patent CN1838482B provides a metal gloss layer decorative molded article in a beam path for a radar device, comprising a base body composed of a transparent resin layer, which is disposed on the back surface of the base body. a tin and/or tin alloy layer, and a decorative lacquer layer disposed on the back side of the tin and/or tin alloy layer.
  • the molded article described in this patent has a delicate metal design similar to that of chrome plating, and does not hinder the transmission of radio waves.
  • the molded articles described in the above patents have a small transmission loss and can provide a desired appearance
  • these molded articles are used as radar shields in radar systems, and there are some defects such as insufficient corrosion resistance and long-term ultraviolet light irradiation.
  • the product is discolored and the surface brightness of the product is low, which will affect the service life of the radar shield.
  • the invention is further improved and optimized on the basis of the above invention, and the object is to provide a radar protection cover with good corrosion resistance, good surface reflection and long service life, and the radar protection cover has a small electromagnetic wave back and forth. It transmits the attenuation amount and can adapt to the reliability of the attenuation amount of the loading position within a certain range in the three-dimensional direction.
  • Another object of the present invention is to provide a method of manufacturing the above radar shield.
  • a radar protective cover comprising a polycarbonate base, which further comprises a transparent polycarbonate front cover connected to a polycarbonate base, said transparent polycarbonate
  • the back side of the front cover is provided with a primer layer, a colored layer, a nano metal layer and a paint protective layer, wherein the thickness of the primer layer is 5 ⁇ 25 ⁇ , and the thickness of the colored layer is 0.1 ⁇ , the nano metal layer The thickness is 0.1 ⁇ , and the thickness of the protective layer of the coating is 5 ⁇ 25 ⁇ ; the sum of the attenuation of the electromagnetic wave of the nano metal layer and the protective layer of the coating does not exceed 0.4dB.
  • the side of the radar shield facing the radar is referred to as the back of the radar shield, and accordingly, the side of the radar shield facing the front of the vehicle is referred to as the front.
  • the back side of the transparent polycarbonate front cover is facing the radar side, and it is close to the back of the front cover.
  • the radar protective cover of the present invention comprises a polycarbonate base and a transparent polycarbonate front cover connected to the polycarbonate base, and the back surface of the front cover is coated with "undercoat layer/colored layer/nano metal layer/paint protective layer" After the composite plating, it has a metallic luster, and the adhesion of the colored layer to the front cover is enhanced by the spraying of the undercoat layer, and the sum of the electromagnetic wave back and forth transmission attenuation of the nano metal layer and the coating protective layer does not exceed 0.4 dB, which ensures the lightning
  • the protective cover has almost no effect on the radar.
  • the adhesion of each layer is ensured on the one hand, and the surface hardness, brightness and gloss of the protective cover, salt spray corrosion resistance The performance can meet the higher requirements and greatly extend the service life.
  • the electromagnetic wave back and forth transmission attenuation is less than 1.5dB, and can adapt to the reliability of the loading position in a certain range in the three-dimensional direction.
  • the colored layer may be a black film layer or a color film layer according to actual needs.
  • the front surface of the transparent polycarbonate front cover is provided.
  • the topcoat layer can be sprayed with an acrylate-isocyanate clear lacquer, acrylic or the like to protect the transparent polycarbonate front cover by air spray, thereby improving the surface abrasion resistance and scratch resistance.
  • the nano metal layer of the present invention may be a nano indium or tin layer, or may be a nano indium or tin alloy layer.
  • the coating protection layer may include a plurality of layers, such as an adhesion-promoting undercoat layer and an anti-corrosion, antistatic accumulation, high abrasion resistance top coat layer or a primer layer and a top coat layer.
  • the coating material may be at least one selected from the group consisting of polyimide resin, acrylic urethane, epoxy epoxy resin, and polyurethane.
  • the coating protective layer comprises a polyimide resin coating (primer coating) or an epoxy epoxy coating having a thickness of 0 to 10 ⁇ m, and an acrylic polyurethane coating having a thickness of 5 to 20 ⁇ m ( Top coat).
  • the primer layer of the present invention may be selected from various primers known to those skilled in the art which can reduce the outgassing of the nanometal layer and enhance the bonding strength of the nanometal layer, such as an aliphatic epoxy modified acrylate.
  • an aliphatic epoxy modified acrylate such as an aliphatic epoxy modified acrylate.
  • the use of aliphatic epoxy modified acrylate can further improve the reflection and mirror effect of the nano metal layer.
  • the transparent polycarbonate front cover is bonded to the polycarbonate base by means of an adhesive or overmolding.
  • the front cover is placed as an insert in an injection mold of the base for injection molding, so that the two are integrally connected.
  • the invention also provides a method for manufacturing a radar protective cover, which comprises the following steps:
  • step (1) spraying the primer on the back side of the front cover treated by the step (1), and after leveling for 10 to 15 minutes, baking at 70 to 90 V for 20 to 30 minutes to thermally cure the primer;
  • the manufacturing method further includes pretreating the front surface of the transparent front cover before the step (1). After that, the topcoat is sprayed by air spray method, and the thickness of the spray is 5 ⁇ 25 ⁇ .
  • the back surface and the front surface of the transparent front cover are pretreated, and the surface can be degreased with a degreaser, and then washed with water and dried.
  • the purpose of the pretreatment is to prepare for surface spraying and curing, which is beneficial to the surface. Adhesion of the surface spray.
  • the step (2) specifically cuts the hot stamping paper according to the size of the transparent front cover, and then places the front cover on the bottom mold, and then places the hot stamping paper on the back surface of the front cover, using pressure
  • the front cover is blown for 3 to 5 seconds for a compressed gas of 3 to 5 MPa. After holding for 1 to 3 seconds at 180 to 210 ° C, the front cover is taken out, and then the excess hot stamping film is removed.
  • the step (2) may be: performing color printing on the back surface of the front cover after the step (1).
  • the primer, the topcoat and the organic coating of the invention adopt the air spraying method, and the air spraying is a coating process which is widely used in the current paint coating construction. It uses a compressed air flow, which flows through the nozzle hole of the spray gun to form a negative pressure. The negative pressure causes the paint to be sucked from the suction pipe, and is sprayed through the nozzle to form a paint mist. The paint spray is sprayed onto the surface of the painted component to form a hook. Paint film. Air spray can produce a uniform paint, the coating is smooth and smooth; for the hidden parts of the parts (such as gaps, bumps), can also be sprayed.
  • the specific steps of magnetron sputtering and nano-metal plating in the step (4) are as follows: the front cover is hung on the workpiece holder of the vacuum coating device, and the vacuum is evacuated to a vacuum of 8.0 x 10_ 5 Pa, and then opened. Argon gas, nano-metal plating was performed by magnetron sputtering for 1-2 min.
  • the present invention has the following outstanding advantages and beneficial effects compared with the prior art:
  • the front cover of the radar cover of the present invention has a structure of "primer/colored layer/nano metal layer/coating protective layer" facing the radar side, and each layer adopts an appropriate thickness and requires electromagnetic waves of the nano metal layer and the coating protective layer.
  • the sum of the attenuation of the back-and-forth transmission does not exceed 0.4 dB.
  • the radar protection cover with this structure has a small amount of electromagnetic wave transmission attenuation, and can adapt to the attenuation of the loading position in a certain range in the three-dimensional direction.
  • Reliability The attenuation of the electromagnetic wave is less than 1.5dB before the factory is tested.
  • the attenuation of the electromagnetic wave back and forth in the three-dimensional direction of the left and right, the front and rear 5mm and the upper and lower 10mm after loading is less than 1.5dB;
  • the invention has an undercoat layer on the radar facing side of the front cover of the radar protective cover, so that the adhesion of the colored layer is enhanced, and the nano metal layer is disposed on the colored layer, which has better reflection degree and reduces vacuum plating.
  • the deflation, the color tone can be adjusted according to the needs, the color is rich, and the protective layer of paint is also provided on the nano metal layer, thereby greatly improving the salt spray corrosion resistance and wear resistance of the radar protective cover, and greatly prolonging its use. Life expectancy
  • the radar protective cover of the present invention generally has a diameter of less than 20 cm, and can be formed into various shapes such as a square shape, a circular shape, a polygonal shape, an elliptical shape, etc. as needed, and has a rich color tone, strong adhesion of each coating layer, and salt spray resistance.
  • FIG. 1 is a schematic cross-sectional structural view of a transparent polycarbonate front cover according to an embodiment of the present invention
  • 0 is the radar
  • 1 is the transparent plastic front cover
  • 2 is the topcoat layer
  • 3 is the primer layer
  • 4 is the black film layer or the color film layer
  • 5 is the nano metal layer
  • 6 is the paint protective layer.
  • the radar protection cover of the present invention is installed on the detection part side of the radar 0, so that the electromagnetic wave emitted by the radar 0 passes through the radar protection cover, and the radar 0 has a transmission signal part and a reception signal part, and the emission signal part is transmitted.
  • the frequency of the detection workshop is a millimeter electromagnetic wave having a frequency of 76 GHz to 77 GHz, and the receiving signal portion receives the reflected electromagnetic wave reflected from the obstacle.
  • the electromagnetic wave emitted by radar 0 passes through the radar protective cover, and electromagnetic wave attenuation occurs.
  • the millimeter electromagnetic wave is emitted by the transmitting signal part through the radar protective cover and reflected by the obstacle and then received by the receiving signal part through the radar protective cover or the nano metal layer or the protective layer of the coating.
  • the electromagnetic wave will be attenuated during the whole process, and the attenuation of the whole process is The amount of attenuation transmitted back and forth by the electromagnetic wave referred to in the present invention. In order for the radar 0 to work stably and reliably, the amount of attenuation must be suppressed to be as low as possible.
  • a 5mm thick radar protective cover consisting of a polycarbonate base and a transparent polycarbonate front cover 1 joined to the polycarbonate base by an adhesive, as shown in Figure 1, on the front side of the transparent polycarbonate front cover 1.
  • the back surface of the transparent polycarbonate front cover 1 is provided with a primer layer 3 having a thickness of 5 ⁇ m from the inside to the outside, a black film layer having a thickness of ⁇ . ⁇ 4, and a thickness of O.
  • the nano metal layer 5 of m and the coating protective layer 6 having a thickness of 5 ⁇ m.
  • the electromagnetic wave of the nano metal layer 5 has a transmission attenuation of 0.2 dB
  • the electromagnetic wave of the paint protection layer 6 has a transmission attenuation of 0.2 dB.
  • the coating protective layer 6 is a 5 ⁇ m thick acrylic urethane coating mainly used for protecting the nano metal layer 5 and protecting the protective cover against harsh environments for a long time
  • the nano metal layer 5 is a nano indium layer
  • the primer layer 3 is an aliphatic epoxy modified layer.
  • the acrylate layer is used to increase the adhesion of the film layer.
  • the radar shield is produced by the following method, which includes the following steps:
  • step (5) The front cover treated in step (5) is connected to a black opaque base by an adhesive to obtain a finished product.
  • the front surface of the transparent front cover is pretreated, and then the top coat is sprayed by air spraying method, the top paint is used to protect the front cover, improve the hardness, make it wear-resistant, scratch-resistant, and resistant to ultraviolet rays.
  • an organic coating having the above functions such as an acrylate-isocyanate clear lacquer, which is commonly used by those skilled in the art, can be used, and the thickness of the coating is 5 ⁇ m.
  • the primer in the above step (2) is used to enhance the adsorption of the nanometal, and an aliphatic epoxy-modified acrylate or other substance well known to those skilled in the art may be used.
  • a 7.5mm thick radar protective cover consisting of a polycarbonate base and a transparent polycarbonate front cover 1 joined to the polycarbonate base by overmolding, as shown in Figure 1, a transparent polycarbonate front cover 1 of A topcoat layer 2 having a thickness of 25 ⁇ m is disposed on the front surface, and a back layer of the transparent polycarbonate front cover 1 is provided with a primer layer 3 having a thickness of 25 ⁇ m, a color film layer 4 having a thickness of ⁇ , and a thickness of ⁇ .
  • the nano metal layer 5 and the coating protective layer 6 having a thickness of 25 ⁇ m, wherein the electromagnetic wave of the nano metal layer 5 has an attenuation of 0.3 dB, and the electromagnetic wave of the coating protective layer 6 has an attenuation of 0.1 dB.
  • the protective coating layer 6 is mainly used for protecting the nano metal layer 5 and protecting the protective cover against harsh environments for a long time, including a polyimide resin coating having a thickness of ⁇ , an acrylic polyurethane coating having a thickness of 5 ⁇ , and a nano-indium alloy of the nano-metal layer 5 being a nano-indium alloy.
  • the layer, and the primer layer 3 is an aliphatic epoxy-modified acrylate layer for enhancing adhesion of the film layer.
  • the method for manufacturing the radar protective cover includes the following steps:
  • the primer is sprayed on the back surface, and after being leveled for 15 minutes, it is baked at 90 ° C for 30 minutes to be thermally cured;
  • Magnetron sputtering is applied to one side of the color film of the front cover on which the color film is printed, and the front cover is hung on the workpiece holder of the vacuum coating equipment, and vacuum is applied until the vacuum degree is 8.0 x lO 5 Pa Then, argon gas is turned on, and nano-indium alloy is plated by magnetron sputtering for 1-2 min;
  • the front cover treated by the step (4) is coated with polyimide resin and acrylic polyurethane on the back side by air spraying, and the total thickness of the coating is 15 ⁇ m, and then baked at 90 ° C for 2 hr. take out;
  • step (5) The front cover treated in step (5) is placed as an insert in an injection mold of a black opaque base for injection molding, and the front cover and the base are integrally connected to each other.
  • the front surface of the transparent front cover is pretreated, and then the top coat is sprayed by air spraying method, the top paint is used to protect the front cover, the hardness thereof is improved, the wear resistance is scratched, and the scratch resistance can be adopted.
  • An organic coating having the above functions such as acrylic acid, which is commonly used by those skilled in the art, has a spray thickness of 25 ⁇ m.
  • the primer in the above step (2) is used to enhance the adsorption of the nanometal, and an aliphatic epoxy-modified acrylate or other substance well known to those skilled in the art may be used.
  • the electromagnetic wave of the metal layer 5 has an attenuation of 0.1 dB
  • the electromagnetic wave of the coating protective layer 6 has a transmission attenuation of 0.3 dB.
  • the protective coating layer 6 is mainly used for protecting the nano metal layer 5 and protecting the protective cover against harsh environments for a long period of time, including an epoxy epoxy resin coating of ⁇ thickness, the nano metal layer 5 being a nano tin alloy layer, and the primer layer 3
  • An aliphatic epoxy-modified acrylate layer is used to increase the adhesion of the film layer.
  • the method for manufacturing the radar protective cover includes the following steps:
  • the transparent front cover is sprayed with a primer on the back side, and after leveling for 10 minutes, it is baked at 80 ° C for 25 minutes to be thermally cured;
  • Magnetron sputtering is applied to one side of the color film on which the color film is printed, and the front cover is hung on the workpiece holder of the vacuum coating equipment, and vacuum is applied to a vacuum of 8.0 x lO 5 Pa Afterwards, then argon gas is turned on, and the nano tin alloy is plated by magnetron sputtering for 2 min;
  • the front cover treated by the step (4) is coated with an epoxy resin coating on the back surface by air spraying, and the total thickness of the coating is ⁇ , and then baked at 80 ° C for 0.5 hr. take out;
  • step (5) The front cover treated in step (5) is placed as an insert in an injection mold of a black opaque base for injection molding, and the front cover and the base are integrally connected to each other.
  • the front surface of the transparent front cover is pretreated, and then the top coat is sprayed by air spraying method, the top paint is used to protect the front cover, the hardness thereof is improved, the wear resistance is scratched, and the scratch resistance can be adopted.
  • An organic coating having the above functions such as acrylic acid, which is commonly used by those skilled in the art, has a spray thickness of 15 ⁇ m.
  • a 7.5mm thick radar protective cover consisting of a polycarbonate base and a transparent polycarbonate front cover 1 joined to the polycarbonate base by overmolding, as shown in Figure 1, a transparent polycarbonate front cover 1 a topcoat layer 2 having a thickness of 20 ⁇ m is disposed on the front surface, and a primer layer 3 having a thickness of 15 ⁇ m and a black film layer having a thickness of 0.8 ⁇ m are disposed on the back surface of the transparent polycarbonate front cover 1 from the inside to the outside.
  • the nano metal layer 5 having a thickness of 0.6 ⁇ m and the coating protective layer 6 having a thickness of 20 ⁇ m are used, wherein the electromagnetic wave of the nano metal layer 5 has an attenuation of 0.2 dB, and the electromagnetic wave of the paint protective layer 6 has a transmission attenuation of 0.2 dB.
  • the protective coating layer 6 is mainly used to protect the nano metal layer 5 and protect the protective cover from harsh environments for a long period of time, including an epoxy resin coating having a thickness of 5 ⁇ m, an antistatic paint layer having a thickness of 15 ⁇ m, and a nano metal layer.
  • 5 is a nano tin layer
  • the primer layer 3 is an aliphatic epoxy modified acrylate layer for improving adhesion of the film layer.
  • the method for manufacturing the radar protective cover includes the following steps: (1) pretreating the back of the transparent front cover to make the surface clean;
  • the primer is sprayed on the back surface, and after being leveled for 15 minutes, it is baked at 90 ° C for 30 minutes to be thermally cured;
  • the front cover treated by the step (4) is coated with an epoxy resin on the back surface by air spraying, and the total thickness of the spray is 5 ⁇ m, and then baked at 90 ° C for 1.5 hr and then taken out;
  • step (5) The front cover treated in step (5) is connected to a black opaque base by an adhesive to obtain a finished product.
  • the front surface of the transparent front cover is pretreated, and then the top coat is sprayed by air spraying method, the top paint is used to protect the front cover, improve the hardness, make it wear-resistant, scratch-resistant, and resistant to ultraviolet rays.
  • an organic coating having the above functions such as an acrylate-isocyanate clear lacquer, which is commonly used by those skilled in the art, can be used, and the thickness of the coating is 20 ⁇ m.
  • the thickness of the transparent resin layer is 5. 5mm, the thickness of the transparent resin layer is 5. 5mm, for the transparent resin layer
  • the radar shield of this embodiment is tested for attenuation before leaving the factory. This test equipment is specific to the automotive industry and is well known to those skilled in the art. During the test, the product is placed according to the position of the vehicle body. One end emits millimeter wave (76 GHz to 77 GHz), the angle of the measuring port is 35 degrees, and the left and right sides are 25 degrees. The other end receives and displays the radar one-way transmission attenuation amount on the computer.
  • the comparison of the millimeter wave back and forth transmission attenuation of the radar protective cover of the inventive embodiments 1 to 6 and the molded article of the comparative example is as follows: Transfer the attenuation amount back and forth after loading and unloading, left and right, 5mm in front and rear, and 10mm in the 3D direction

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Abstract

本发明公开了一种雷达保护罩，属于表面技术领域，包括聚碳酸酯底座，其特征在于：它还包括与聚碳酸酯底座连接的透明聚碳酸酯前盖，所述透明聚碳酸酯前盖背面上由里向外依次设置有底漆层、有色层、纳米金属层、涂料保护层，纳米金属层与涂料保护层的电磁波来回传输衰减量之和不超过0.4dB。本发明还提供了一种雷达保护罩的制造方法。本发明雷达保护罩耐腐蚀性佳，具有极小的电磁波来回传输衰减量外，并且能适应装车位置在三维方向的一定范围内衰减量的可靠性。

Description

一种雷达保护罩及其制造方法
技术领域
本发明涉及一种雷达保护罩，该雷达保护罩适用于机动车辆的雷达***； 本 发明还涉及该雷达保护罩的制造方法。
背景技术
汽车雷达是用于汽车或其他地面机动车辆的雷达。 它包括基于不同技术 (比如激光、超声波、微波、毫米波）的各种不同雷达， 有着不同的功能（比 如发现障碍物、 预测碰撞、 自适应巡航控制）。 各种雷达的具体用途和结构 不尽相同， 但基本形式是一致的， 包括： 发射机、 发射天线、 接收机、 接收 天线， 处理部分以及显示器， 还有电源设备、 数据录取设备、 抗干扰设备等 辅助设备。 其原理是雷达设备的发射机通过天线把电磁波能量射向空间某一 方向， 处在此方向上的物体反射碰到的电磁波； 雷达天线接收此反射波， 送 至接收设备进行处理， 提取有关该物体的某些信息。
雷达保护罩是把汽车雷达天线保护在罩内的一种保护装置，保护罩不仅 防止碎石冲击， 保护雷达和天线不受外界损伤， 确保雷达在各种情况下正常 运行， 提高雷达的使用寿命， 而且尽量减少对雷达天线的电磁性的影响。 配 置雷达罩是作为消除风沙雨雪等环境负载影响、改善工作条件、提高雷达天线乃 至整机可靠性的一项重要举措,借助雷达罩覆盖天线或 "雷达头" 使之免受风 沙雨雪等环境损害，而对电磁波则保持 "透明"，从而让雷达功能得以充分发挥。 雷达罩的历史起码可以追溯到 50 年代以前,我国起步于 60 年代中期，国外雷达 罩早已形成技术标准及产品系列,设计及加工技术成熟,水平较高，国内也有不少 成熟产品可供选用，但是要实现高性能指标还有一定的困难。
已有技术如专利 EP1750329A1 公开了一种用于汽车雷达***的天线罩及其 制造方法， 该雷达天线罩的第一接触面上安装有一个绝缘透镜， 雷达天线罩上的 绝缘透镜可通过粘合连接或者焊接方式安装在雷达天线罩的接触面上。该专利主 要用于解决现有汽车雷达***占用空间大的问题。
专利 JP2000159039A和 JP200049522A均公开了一种位于雷达装置的射束路 径的覆盖部分，由塑料覆盖部件外表面具有由铟构成的薄金属层以及在由铟构成 的薄金属层上形成的保护层组成，该保护罩从外面看具有金属光泽但不会干扰雷 达作用的发挥。但该覆盖部件的表面较平整及色调单一，制约了所形成的保护罩 在车身多种角度位置的选择。
为了解决上述覆盖件色调单一的问题， 专利 CN1838482B提供了一种用于雷 达装置的射束路径中的金属光泽层装饰成形品， 包括由透明树脂层构成的基体， 设置在该基体的背面上的锡和 /或锡合金层，以及设置在该锡和 /或锡合金层的背 面上的装饰漆层。该专利所述成形品具有类似镀铬等色调的精美金属设计， 并且 不会妨碍无线电波的传输。
尽管上述专利所描述的成形品具有很小的传输透过损失且能提供所需外观， 但这些成形品用作雷达***中的雷达保护罩则存在一些缺陷比如耐腐蚀性不足， 长期紫外光照射使得产品变色，产品表面亮度较低，会影响到雷达保护罩使用寿 命。
发明内容
本发明在上述发明的基础上进一步改进优化而来，目的是提供一种具有耐腐 蚀性佳， 表面反光度好， 使用寿命较长的雷达保护罩， 该雷达保护罩除具有极小 的电磁波来回传输衰减量外，并且能适应装车位置在三维方向的一定范围内衰减 量的可靠性。
本发明的另一目的是提供上述雷达保护罩的制造方法。
本发明的上述技术目的是通过以下技术方案得以实现的： 一种雷达保护罩， 包括聚碳酸酯底座， 它还包括与聚碳酸酯底座连接的透明聚碳酸酯前盖，所述透 明聚碳酸酯前盖背面上由里向外依次设置有底漆层、有色层、纳米金属层、涂料 保护层， 其中底漆层的厚度为 5~25μπι，有色层的厚度为 0.1~ΐμηι， 纳米金属层的 厚度为 0.1〜ΐμηι， 涂料保护层的厚度为 5〜25μηι; 所述纳米金属层与涂料保护层 的电磁波来回传输衰减量之和不超过 0.4dB。
本发明中把雷达保护罩面向雷达的一面称为雷达保护罩的背面，相应地，把 雷达保护罩面向车辆前方的一面称为正面。把透明聚碳酸酯前盖背面朝向雷达方 向为外， 紧贴前盖背面的为里。
本发明的雷达保护罩由聚碳酸酯底座和与聚碳酸酯底座连接的透明聚碳酸 酯前盖， 其前盖的背面上涂覆"底涂层 /有色层 /纳米金属层 /涂料保护层"复合镀 层后， 具有金属光泽， 通过底涂层的喷涂使得有色层与前盖的附着力增强， 而 纳米金属层与涂料保护层的电磁波来回传输衰减量之和不超过 0.4dB，保证了雷 达保护罩对雷达几乎不产生影响， 除此之外， 通过各层不同厚度的设置， 一 方面保证了各层的附着力， 同时使得保护罩的表面硬度、 亮度和光泽、 耐盐 雾腐蚀的性能能满足更高的要求， 大大延长了其使用寿命， 而且雷达保护罩使 用后， 电磁波来回传输衰减量小于 1.5dB，并且能适应装车位置在三维方向的一 定范围内衰减量的可靠性。
作为本发明的优选， 所述有色层可根据实际需要为黑膜层或彩色膜层。 作为本发明的优选， 为了进一步延长雷达保护罩的使用寿命， 提高雷达保 护罩正面的外观及耐磨、 耐划伤性， 耐紫外光老化性， 所述透明聚碳酸酯前盖 的正面上设置有厚度为 5~25μπι的面漆层。该面漆层可以采用空气喷涂的方法喷 涂丙烯酸酯 -异氰酸酯透明漆、 丙烯酸等用以保护透明聚碳酸酯前盖， 提高其表 面耐磨性、 耐划伤性。
本发明的纳米金属层可为纳米铟或锡层， 也可为纳米铟或锡合金层。
作为本发明的优选， 所述涂料保护层可以包括多层， 如增强附着的底涂层 和防侵蚀， 防静电累积、 高耐磨性的面涂层或者还包括设于底涂层与面涂层之 间的中间涂层。 其中的涂料可以选自聚酰亚胺树脂、 丙烯酸聚氨酯、 环氧族环 氧树脂、 聚氨酯中的至少一种。 作为本发明的进一步优选， 所述涂料保护层包 括 0〜10μπι厚度的聚酰亚胺树脂涂层（底涂层）或环氧族环氧树脂涂层， 5〜20μπι 厚度的丙烯酸聚氨酯涂层 （面涂层）。
本发明底漆层可选用本领域技术人员所熟知的各种能可以减少纳米金属层 时的放气及增强纳米金属层的结合力的底漆， 如脂肪族环氧改性丙烯酸酯。 如 选用脂肪族环氧改性丙烯酸酯还可进一步提高纳米金属层的反射和镜面效果。
作为本发明的优选， 所述透明聚碳酸酯前盖通过粘结剂或二次注塑的方式 与聚碳酸酯底座粘结。 采用二次注塑是将前盖作为嵌件放在底座的注塑模具中 进行注塑， 使两者连接成一体。
本发明还提供一种雷达保护罩的制造方法， 它包括如下步骤：
( 1 ) 对透明聚碳酸酯前盖的背面进行预处理， 使其表面洁净；
( 2 )对经步骤（ 1 )处理后的前盖背面喷涂底漆，流平 10~15min后，在 70~90 V 下烘烤 20~30min， 使底漆热固化；
( 3 ) 对经步骤 （2) 处理后的前盖背面进行有色印刷；
(4) 对经步骤 （3 ) 处理后的前盖的背面进行磁控溅射镀纳米金属； ( 5 ) 对经步骤 （4) 处理后的前盖背面涂覆有机涂料， 然后在 70~90°C下烘 烤 0.5~3.5hr后取出；
( 6) 将经步骤 （5 ) 处理后的前盖通过粘结剂或注塑的方式与一不透明的底 座连接即得成品。 为了提高雷达保护罩正面的外观及耐磨、 耐划伤性， 耐紫外光老化性， 作为 本发明的优选， 所述制造方法还包括在步骤 （1 ) 之前对透明前盖的正面进行预 处理后再采用空气喷涂法对其喷涂面漆， 喷涂厚度为 5~25μπι。
本发明中对透明前盖的背面和正面进行预处理，可使用除油剂对表面进行除 油， 再用水清洗干净后烘干， 预处理的目的是为表面喷涂及固化做好准备， 有利 于表面喷涂物的附着。
作为本发明的优选，所述步骤（2)具体为根据透明前盖的大小剪裁烫印纸， 然后把前盖放在底模上， 再将烫印纸置于前盖的背面上， 用压力为 3〜5MPa的压 缩气体对前盖吹气 3~5秒， 在 180~210°C下保温 1~3秒后， 取出前盖， 然后撕去 多余烫印膜。
作为本发明的优选， 所述步骤（2)还可以为： 将经步骤（1 )处理后的前盖 背面进行彩色印刷。
本发明的底漆、面漆、有机涂料均采用空气喷涂法， 空气喷涂是目前油漆涂 装施工中采用得比较广泛的一种涂饰工艺。它是利用压缩空气的气流，流过喷枪 喷嘴孔形成负压， 负压使漆料从吸管吸入， 经喷嘴喷出， 形成漆雾， 漆雾喷身到 被涂饰零部件表面上形成均勾的漆膜。空气喷涂可以产生均勾的漆，涂层细腻光 滑； 对于零部件的较隐蔽部件 （如缝隙、 凹凸）， 也可均勾地喷涂。
作为本发明的优选， 步骤 （4) 中磁控溅射镀纳米金属具体步骤为： 将前盖 挂入真空镀膜设备的工件架上，抽真空至真空度为 8.0x l0_5Pa后，然后开启氩气， 用磁控溅射镀纳米金属 l~2min。
综上所述， 本发明与现有技术相比， 具有以下突出优点及有益效果：
1、 本发明雷达保护罩的前盖面向雷达的一面具有 "底涂层 /有色层 /纳米金属 层 /涂料保护层" 的结构， 各层采用合适厚度并要求纳米金属层与涂料保护层的 电磁波来回传输衰减量之和不超过 0.4dB， 具有这个结构的雷达保护罩具有极小 的电磁波来回传输衰减量，且能适应装车位置在三维方向的一定范围内衰减量的 可靠性： 出厂前进行衰减量全测试得电磁波来回传输衰减量小于 1.5dB， 装车后 在左右、 前后各 5mm及上下各 10mm的三维方向内其电磁波来回传输衰减量小 于 1.5dB;
2、 本发明在雷达保护罩的前盖面向雷达的一面设有底涂层， 使得有色层附 着力增强， 再在有色层上设置纳米金属层， 具有较好的反光度， 降低了真空镀时 的放气， 色调可根据需要进行调整， 色彩丰富， 在纳米金属层上还设置有涂料保 护层， 从而大大提高了雷达保护罩的耐盐雾腐蚀性、耐磨性等， 大大延长了其使 用寿命；
3、本发明的雷达保护罩直径一般在 20cm以下， 可根据需要做成各种形状如 方形、 圆形、 多边形、 椭圆形等等， 具有色调丰富、 各涂层附着力强、 耐盐雾性 好， CASS 试验， 96小时， 使用寿命可达 20年之久， 采用磁控溅射镀纳米金属， 所得雷达保护罩金属感强， 可广泛应用于机动车辆的雷达***。
附图说明
图 1是本发明实施例中透明聚碳酸酯前盖的断面结构示意图；
图中： 0是雷达， 1是透明塑料前盖， 2是面漆层， 3是底漆层， 4是黑膜层或彩 色膜层， 5是纳米金属层， 6涂料保护层。
具体实施方式
下面结合实施例对本发明作进一步详细说明。
如图 1所示， 本发明中的雷达保护罩安装在雷达 0的探测部位侧， 使得雷达 0 发射的电磁波透过雷达保护罩， 雷达 0具有发射信号部和接收信号部， 发射信号 部发射适用于探测车间距离用的频率为 76GHz~77GHz的毫米电磁波，接收信号 部接收从障碍物反射回来的反射电磁波。 雷达 0发射的电磁波经过雷达保护罩， 会出现电磁波衰减。毫米电磁波经发射信号部发射通过雷达保护罩经障碍物反射 再通过雷达保护罩或纳米金属层或涂料保护层由接收信号部接收的毫米电磁波， 整个过程电磁波会出现衰减，整个过程的衰减量即为本发明所指的电磁波来回传 输衰减量。 为了使雷达 0稳定可靠的工作， 必须抑制该衰减量， 使其尽可能低。
实施例 1
一种厚度为 5mm的雷达保护罩， 由聚碳酸酯底座和与聚碳酸酯底座通过粘 结剂连接的透明聚碳酸酯前盖 1， 由图 1所示， 透明聚碳酸酯前盖 1正面上设置 有厚度为 5μπι的面漆层 2， 透明聚碳酸酯前盖 1背面上由里向外依次设置有厚度 为 5μπι的底漆层 3、 厚度为 Ο. ΐμπι的黑膜层 4、 厚度为 O. m的纳米金属层 5以 及厚度为 5μπι涂料保护层 6。其中纳米金属层 5的电磁波来回传输衰减量为 0.2dB， 涂料保护层 6的电磁波来回传输衰减量为 0.2dB。涂料保护层 6为 5μπι厚度的丙 烯酸聚氨酯涂层主要用于保护纳米金属层 5并使保护罩耐恶劣环境长期使用，纳 米金属层 5为纳米铟层，而底漆层 3为脂肪族环氧改性丙烯酸酯层用以提高膜层 的附着。
该雷达保护罩通过下述方法制得， 它包括以下步骤：
( 1 ) 对透明前盖的背面进行预处理， 使其表面洁净；
(2)对经步骤（1 )处理后的透明前盖背面喷涂底漆，流平 lOmin后，在 70°C 下烘烤 20min， 使底漆热固化；
( 3 )根据透明前盖的大小剪裁烫印纸， 然后把前盖放在底模上， 再将烫印纸 置于前盖的背面上， 用压力为 3MPa的压缩气体对前盖吹气 3秒， 在 180°C下保 温 2秒后， 取出前盖， 然后撕去多余烫印膜；
(4)对印刷有烫印膜的前盖的烫印膜的一面进行磁控溅射离子镀纳米铟，将 前盖挂入真空镀膜设备的工件架上， 抽真空至真空度为 8.0x lO_5Pa后， 然后开启 氩气， 用磁控溅射镀纳米铟 l~2min;
( 5 ) 对步骤 （4) 处理后的前盖的背面采用空气喷涂法涂覆有机涂料聚酰亚 胺树脂， 喷涂总厚度为 5μπι， 然后在 70°C下烘烤 3.5hr后取出；
( 6) 将步骤 （5 ) 处理后的前盖通过粘结剂与一黑色不透明的底座连接即得 成品。
在步骤 （1 ) 之前对透明前盖的正面进行预处理后再采用空气喷涂法对其喷 涂面漆， 该面漆用于保护前盖， 提高其硬度， 使其耐磨， 耐刮， 耐紫外光老化， 可采用本领域技术人员常用的具有以上功能的有机涂料， 如丙烯酸酯-异氰酸酯 透明漆， 喷涂厚度为 5μπι。
上述步骤 （2) 中的底漆用于增强纳米金属的吸附， 可使用本领域技术人员 熟知的脂肪族环氧改性丙烯酸酯或其它物质。
实施例 2
一种厚度为 7.5mm 的雷达保护罩， 由聚碳酸酯底座和与聚碳酸酯底座通过 二次注塑连接一体的透明聚碳酸酯前盖 1， 由图 1所示， 透明聚碳酸酯前盖 1的 正面上设置有厚度为 25μπι的面漆层 2， 透明聚碳酸酯前盖 1 的背面由里向外依 次设置有厚度为 25μπι的底漆层 3、 厚度为 Ιμπι的彩色膜层 4、 厚度为 ΐμηι的纳 米金属层 5以及厚度为 25μπι涂料保护层 6， 其中纳米金属层 5的电磁波来回传 输衰减量为 0.3dB， 涂料保护层 6的电磁波来回传输衰减量为 0.1dB。 涂料保护 层 6主要用于保护纳米金属层 5并使保护罩耐恶劣环境长期使用， 包括 ΙΟμπι厚 度的聚酰亚胺树脂涂层， 5μπι厚度的丙烯酸聚氨酯涂层， 纳米金属层 5 为纳米 铟合金层， 而底漆层 3为脂肪族环氧改性丙烯酸酯层用以提高膜层的附着。
该雷达保护罩的制造方法包括以下步骤：
( 1 ) 对透明前盖的背面进行预处理， 使其表面洁净；
(2) 经步骤 （1 ) 处理后的透明前盖， 对其背面喷涂底漆， 流平 15min后， 在 90°C下烘烤 30min， 使之热固化；
( 3 ) 将经步骤 （2) 处理后的前盖背面进行彩色印刷；
(4)对印刷有彩色膜的前盖的彩色膜的一面进行磁控溅射镀纳米铟，将前盖 挂入真空镀膜设备的工件架上，抽真空至真空度为 8.0x lO_5Pa后，然后开启氩气， 用磁控溅射镀纳米铟合金 l~2min;
( 5 ) 经步骤 （4) 处理后的前盖， 对其背面采用空气喷涂法先后涂覆聚酰亚 胺树脂、 丙烯酸聚氨酯， 涂覆总厚度为 15μπι， 然后在 90°C下烘烤 2hr后取出；
( 6) 将步骤 （5 ) 处理后的前盖作为嵌件放在一黑色不透明的底座的注塑模 具中进行注塑， 是前盖和底座连为一体即得成品。
在步骤 （1 ) 之前对透明前盖的正面进行预处理后再采用空气喷涂法对其喷 涂面漆， 该面漆用于保护前盖， 提高其硬度， 使其耐磨， 耐刮， 可采用本领域技 术人员常用的具有以上功能的有机涂料， 如丙烯酸， 喷涂厚度为 25μπι。
上述步骤（2) 中的底漆用于增强纳米金属的吸附， 可使用本领域技术人员 熟知的脂肪族环氧改性丙烯酸酯或其它物质。
实施例 3
一种厚度为 5mm的雷达保护罩， 由聚碳酸酯底座和与聚碳酸酯底座通过二 次注塑连接一体的透明聚碳酸酯前盖 1， 由图 1所示， 透明聚碳酸酯前盖 1背向 雷达 0的一面上设置有厚度为 15μπι的面漆层 2，透明聚碳酸酯前盖 1面向雷达 0 的一面上由里向外依次设置有厚度为 15μπι的底漆层 3、厚度为 0.5μπι的彩色膜层 4、 厚度为 0.5μηι的真空镀纳米金属层 5以及厚度为 ΙΟμπι涂料保护层 6， 其中纳 米金属层 5的电磁波来回传输衰减量为 0.1dB， 涂料保护层 6的电磁波来回传输 衰减量为 0.3dB。 涂料保护层 6主要用于保护纳米金属层 5并使保护罩耐恶劣环 境长期使用， 包括 ΙΟμπι厚度的环氧族环氧树脂涂层， 纳米金属层 5为纳米锡合 金层， 而底漆层 3为脂肪族环氧改性丙烯酸酯层用以提高膜层的附着。
该雷达保护罩的制造方法包括以下步骤：
( 1 ) 对透明前盖的背面进行预处理， 使其表面洁净；
(2) 经步骤 （1 ) 处理后的透明前盖， 对其背面喷涂底漆， 流平 lOmin后， 在 80°C下烘烤 25min， 使之热固化；
( 3 ) 将经步骤 （2) 处理后的前盖背面进行彩色印刷；
(4)对印刷有彩色膜的前盖的彩色膜的一面进行磁控溅射镀纳米锡合金，将 前盖挂入真空镀膜设备的工件架上， 抽真空至真空度为 8.0x lO_5Pa后， 然后开启 氩气， 用磁控溅射镀纳米锡合金 2min;
( 5 ) 经步骤 （4) 处理后的前盖， 对其背面采用空气喷涂法涂覆环氧族环氧 树脂涂层， 涂覆总厚度为 ΙΟμπι, 然后在 80°C下烘烤 0.5hr后取出；
( 6) 将步骤 （5 ) 处理后的前盖作为嵌件放在一黑色不透明的底座的注塑模 具中进行注塑， 是前盖和底座连为一体即得成品。
在步骤 （1 ) 之前对透明前盖的正面进行预处理后再采用空气喷涂法对其喷 涂面漆， 该面漆用于保护前盖， 提高其硬度， 使其耐磨， 耐刮， 可采用本领域技 术人员常用的具有以上功能的有机涂料， 如丙烯酸， 喷涂厚度为 15μπι。
实施例 4
一种厚度为 7.5mm 的雷达保护罩， 由聚碳酸酯底座和与聚碳酸酯底座通过 二次注塑连接一体的透明聚碳酸酯前盖 1， 由图 1所示， 透明聚碳酸酯前盖 1的 正面上设置有厚度为 20μπι的面漆层 2， 透明聚碳酸酯前盖 1 的背面上由里向外 依次设置有厚度为 15μπι的底漆层 3、 厚度为 0.8μπι的黑膜层 4、 厚度为 0.6μηι的 纳米金属层 5以及厚度为 20μπι涂料保护层 6， 其中纳米金属层 5的电磁波来回 传输衰减量为 0.2dB， 涂料保护层 6的电磁波来回传输衰减量为 0.2dB。 涂料保 护层 6主要用于保护纳米金属层 5并使保护罩耐恶劣环境长期使用， 包括 5μπι 厚度的环氧族环氧树脂涂层， 面涂层为 15μπι厚度的防静电漆层， 纳米金属层 5 为纳米锡层， 而底漆层 3为脂肪族环氧改性丙烯酸酯层用以提高膜层的附着。
该雷达保护罩的制造方法包括以下步骤： ( 1 ) 对透明前盖的背面进行预处理， 使其表面洁净；
(2) 经步骤 （1 ) 处理后的透明前盖， 对其背面喷涂底漆， 流平 15min后， 在 90°C下烘烤 30min， 使之热固化；
( 3 )根据透明前盖的大小剪裁烫印纸， 然后把前盖放在底模上， 再将烫印纸 置于前盖的背面上， 用压力为 5MPa的压缩气体对前盖吹气 5秒， 在 210°C下保 温 1秒后， 取出前盖， 然后撕去多余烫印膜；
(4)对印刷有烫印膜的前盖的烫印膜的一面进行磁控溅射离子镀纳米锡，将 前盖挂入真空镀膜设备的工件架上， 抽真空至真空度为 8.0x l0_5Pa后， 然后开启 氩气， 用磁控溅射镀纳米锡 l~2min;
( 5 ) 经步骤 （4) 处理后的前盖， 对其背面采用空气喷涂法涂覆环氧族环氧 树脂， 喷涂总厚度为 5μπι， 然后在 90°C下烘烤 1.5hr后取出；
( 6) 将步骤 （5 ) 处理后的前盖通过粘结剂与一黑色不透明的底座连接即得 成品。
在步骤 （1 ) 之前对透明前盖的正面进行预处理后再采用空气喷涂法对其喷 涂面漆， 该面漆用于保护前盖， 提高其硬度， 使其耐磨， 耐刮， 耐紫外光老化， 可采用本领域技术人员常用的具有以上功能的有机涂料， 如丙烯酸酯-异氰酸酯 透明漆， 喷涂厚度为 20μπι。
比较例
专利 CN1838482B中的实施例 2， 用于雷达装置的射束路径中的金属光泽层装 饰成形品， 从正面到背面包括： 作为基体的透明树脂层， 厚度为 5. 5mm， 用于增 强透明树脂层与锡和 /或锡合金层之间的粘附的底涂层， 设置在该基体的背面上 的锡和 /或锡合金层， 和设置在该锡和 /或锡合金层的背面上的装饰漆层。
作为雷达保护罩其重要的性能除应保护天线或雷达不受外界损伤， 还特别 需要减少对雷达天线的电磁性的影响， 即对电磁波保持 "透明"，从而让雷达 功能得以充分发挥。本实施例雷达保护罩出厂前进行衰减量测试，此测试设备是 汽车行业专用的， 本技术领域人员熟知的。测试时将产品按车身位置放置， 一端 发射毫米波 （76GHz~77GHz) ， 测量口角度水平、 左右各 35度， 上下各 25 度， 另一端接收并在电脑上显示出雷达单程传输衰减量，本发明实施例 1〜6的雷 达保护罩与对比例的成形品的毫米波来回传输衰减量的比较见下表： 来回传输衰减量 装车后左右、 前后各 5mm及上下各 10mm三维方向内来回 项目
/dB 传输衰减量 /dB
实施例 1.0 1.0
1
实施例 1.3 1.3
2
实施例 0.8 0.8
3
实施例 1.4 1.4
4
对比例 1.6-1.8 本具体实施例仅仅是对本发明的解释，其并不是对发明的限制，本领域技术 人员在阅读完本说明书后可以根据需要对本实施例做出任何修改，但只要在本发 明的权利要求范围内都受到专利法的保护。本发明中未详尽部分均为本领域技术 人员所熟知的技术。

Claims

权利要求书
1、 一种雷达保护罩， 包括聚碳酸酯底座， 其特征在于： 它还包括与聚碳酸酯底 座连接的透明聚碳酸酯前盖， 所述透明聚碳酸酯前盖背面上由里向外依次设 置有底漆层、有色层、纳米金属层、涂料保护层，其中底漆层的厚度为 5〜25μπι， 有色层的厚度为 0.1~ΐμηι， 纳米金属层的厚度为 0.1~ΐμηι， 涂料保护层的厚 度为 5~25μηι; 所述纳米金属层与涂料保护层的电磁波来回传输衰减量之和 不超过 0.4dB。
2、 根据权利要求 1所述一种雷达保护罩， 其特征在于： 所述有色层为黑膜层或 彩色膜层。
3、 根据权利要求 1或 2所述一种雷达保护罩， 其特征在于： 所述透明聚碳酸 酯前盖正面上设置有厚度为 5~25μπι的面漆层。
4、 根据权利要求 3所述的一种雷达保护罩， 其特征在于： 所述涂料保护层包括 0~10μπι厚度的聚酰亚胺树脂涂层或环氧族环氧树脂涂层， 5~20μπι厚度的丙 烯酸聚氨酯涂层。
5、 根据权利要求 3所述的一种雷达保护罩， 其特征在于： 所述透明聚碳酸酯前 盖通过粘结剂或二次注塑的方式与聚碳酸酯底座连接。
6、 一种权利要求 1所述雷达保护罩的制造方法，其特征在于，它包括如下步骤：
( 1 ) 对透明聚碳酸酯前盖的背面进行预处理， 使其表面洁净；
( 2 )对经步骤（ 1 )处理后的前盖背面喷涂底漆，流平 10~15min后，在 70~90 V 下烘烤 20~30min， 使底漆热固化；
( 3 ) 对经步骤 （2 ) 处理后的前盖背面进行有色印刷；
( 4 ) 对经步骤 （3 ) 处理后的前盖的背面进行磁控溅射镀纳米金属；
( 5 ) 对经步骤 （4 ) 处理后的前盖背面涂覆有机涂料， 然后在 70~90°C下烘 烤 0.5~3.5hr后取出；
( 6 ) 将经步骤 （5 ) 处理后的前盖通过粘结剂或注塑的方式与一不透明的底 座连接即得成品。
7、 根据权利要求 6所述一种雷达保护罩的制造方法， 其特征在于： 所述制造方 法还包括在步骤 （1 ) 之前对透明前盖的正面进行预处理后再采用空气喷涂法对 其喷涂面漆， 喷涂厚度为 5~25μπι。
8、根据权利要求 7所述一种雷达保护罩的制造方法， 其特征在于： 所述步骤 ( 2 ) 具体为根据透明前盖的大小剪裁烫印纸， 然后把前盖放在底模上， 再将烫 权利要求书
印纸置于前盖的背面上， 用压力为 3〜5MPa的压缩气体对前盖吹气 3〜5秒， 在 180~210°C下保温 1~3秒后， 取出前盖， 然后撕去多余烫印膜。
9、根据权利要求 7所述一种雷达保护罩的制造方法，其特征在于：所述步骤（2) 具体为： 将经步骤 （1 ) 处理后的前盖背面进行彩色印刷。
10、 根据权利要求 6所述一种雷达保护罩的制造方法， 其特征在于： 步骤 （4) 中磁控溅射镀纳米金属具体步骤为： 将前盖挂入真空镀膜设备的工件架上，抽真 空至真空度为 8.0x 10— 5Pa后， 然后开启氩气， 用磁控溅射镀纳米金属 l~2min。
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CN108615975A (zh) * 2018-05-03 2018-10-02 合肥光博量子科技有限公司 一种防破损的雷达罩
US11552389B2 (en) 2019-04-02 2023-01-10 Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg Radar apparatus, method of manufacturing a radar apparatus and motor vehicle

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CN1838482A (zh) * 2005-03-25 2006-09-27 丰田自动车株式会社 用于雷达装置的射束路径中的金属光泽层装饰成形品
CN101325277A (zh) * 2007-06-13 2008-12-17 丰田合成株式会社 电波穿透罩及电波穿透罩的制造方法
DE102007059758A1 (de) * 2007-12-12 2009-06-18 Daimler Ag Radom für ein Abstands-Warn-Radar in einem Kraftfahrzeug
CN102005647A (zh) * 2009-08-28 2011-04-06 株式会社法尔特克 雷达罩的制造方法

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CN101325277A (zh) * 2007-06-13 2008-12-17 丰田合成株式会社 电波穿透罩及电波穿透罩的制造方法
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108615975A (zh) * 2018-05-03 2018-10-02 合肥光博量子科技有限公司 一种防破损的雷达罩
US11552389B2 (en) 2019-04-02 2023-01-10 Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg Radar apparatus, method of manufacturing a radar apparatus and motor vehicle

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