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CN110053561A - A kind of drag-reduction energy-saving rearview mirror covers - Google Patents

A kind of drag-reduction energy-saving rearview mirror covers Download PDF

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Publication number
CN110053561A
CN110053561A CN201910349971.XA CN201910349971A CN110053561A CN 110053561 A CN110053561 A CN 110053561A CN 201910349971 A CN201910349971 A CN 201910349971A CN 110053561 A CN110053561 A CN 110053561A
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rearview mirror
energy
drag
saving
piezoelectric material
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CN110053561B (en
Inventor
郑焱
张丹
贝绍轶
张兰春
杨艺
李波
李丽
张凯清
马梦琪
李紫娟
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Jiangsu University of Technology
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Jiangsu University of Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/02Rear-view mirror arrangements
    • B60R1/06Rear-view mirror arrangements mounted on vehicle exterior
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/12Mirror assemblies combined with other articles, e.g. clocks
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03GSPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/08Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for recovering energy derived from swinging, rolling, pitching or like movements, e.g. from the vibrations of a machine

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Multimedia (AREA)
  • General Engineering & Computer Science (AREA)
  • Rear-View Mirror Devices That Are Mounted On The Exterior Of The Vehicle (AREA)

Abstract

The invention discloses a kind of drag-reduction energy-saving rearview mirror covers, including back-mirror housing (1) demarcation plate (2), piezoelectric material (3) and pedestal (4) composition;Back-mirror housing (1) is mounted on vehicle body by pedestal (4);Demarcation plate (2) is arranged on the front end face of back-mirror housing (1);A layer of piezo-electric material (3) are respectively provided on the two sides of demarcation plate (2);The electric energy that piezoelectric material generates is drawn from the internal electrode (5) of pedestal (4) is mounted on, via being transmitted to energy storage device after rectification circuit.The present invention enhances the boundary layer perturbation in rearview mirror flow field, postpones the formation of rearview mirror rear end Disengagement zone, can effectively reduce pressure drag by installing demarcation plate in rearview mirror front end;Energy caused by the pressure difference field of demarcation plate two sides is absorbed using the piezoelectric material and energy recycle device being attached on demarcation plate, can further reduce automobile energy consumption.

Description

一种减阻节能后视镜罩A drag-reducing energy-saving rearview mirror cover

技术领域technical field

本发明涉及一种汽车后视镜罩,具体涉及一种减阻节能后视镜罩。The invention relates to an automobile rearview mirror cover, in particular to a drag reduction and energy saving rearview mirror cover.

背景技术Background technique

作为安装在车身上必不可少的部件,外后视镜为驾驶者提供了车辆周围的路况信息,对汽车的行驶安全有着至关重要的影响。它的存在使得车身上增加了展向的突出结构,破坏了车身流场的整体性,空气流经其表面产生的边界层分离和漩涡脱落导致了额外的形状阻力、噪音和振动的产生。对于普通轿车而言,外后视镜虽然仅占据很小的整车投影面积,但是却增加了2%-7%的空气阻力,对于重型卡车而言,其增加的空气阻力更多。鉴于外后视镜对空气阻力的贡献远大于其尺寸所占的面积比重,寻找合适的减阻方法对减少汽车在运输过程中的能源消耗具有重要的意义。As an indispensable component installed on the body, the exterior rearview mirror provides the driver with information about the road conditions around the vehicle, which has a crucial impact on the driving safety of the car. Its existence increases the spanwise protruding structure on the body, destroys the integrity of the body flow field, and the boundary layer separation and vortex shedding generated by the air flowing over its surface lead to additional shape resistance, noise and vibration. For ordinary cars, although the exterior mirrors only occupy a small projected area of the entire vehicle, they increase the air resistance by 2%-7%. For heavy trucks, the increased air resistance is even greater. Considering that the contribution of exterior rearview mirrors to air resistance is much greater than the area proportion of their size, it is of great significance to find suitable drag reduction methods to reduce the energy consumption of vehicles during transportation.

从流体力学的观点看,抑制旋涡剥落及其产生的流场脉动是减小后视镜阻力和噪声的主要手段。已公开专利(CN 104995061 A, CN 106314287 A)采用从后视镜前端吸入空气后端排出空气以及侧面排出空气的方法来实现后视镜的减阻降噪。也有专利从仿生的角度进行了后视镜设计(CN 106379240 A)。本发明通过在后视镜前端安装带有压电材料的隔板,一方面利用隔板阻碍下游两侧卡门涡街的相互作用,进而抑制尾迹涡的形成,另一方面利用压电材料吸收高速气流的振动能量,能够进一步减少由于湍流脉动产生的噪声,从而达到减阻降噪的效果。From the point of view of fluid mechanics, the suppression of vortex spalling and the resulting flow field pulsation is the main means to reduce the drag and noise of rearview mirrors. The published patent (CN 104995061 A, CN 106314287 A) adopts the method of inhaling air from the front end of the rearview mirror and discharging air at the rear end and discharging air from the side to realize drag reduction and noise reduction of the rearview mirror. There is also a patent for rearview mirror design from a bionic perspective (CN 106379240 A). The invention installs a separator with piezoelectric material at the front end of the rearview mirror. On the one hand, the separator is used to hinder the interaction of the Karman vortex street on both sides of the downstream, thereby suppressing the formation of wake vortices, and on the other hand, the piezoelectric material is used to absorb high speed The vibration energy of the airflow can further reduce the noise caused by the turbulent pulsation, so as to achieve the effect of drag reduction and noise reduction.

发明内容SUMMARY OF THE INVENTION

本发明的目的在于提供一种兼具减阻降噪和能量回收功能的后视镜设计;一方面利用后视镜前端布置的分隔板促进后视镜流场边界层扰动,推迟其尾部分离区的形成,从而达到降低空气阻力的目的。另一方面在隔板上安装振动能量回收装置,吸收高速气流的振动能量,实现能量回收。The purpose of the present invention is to provide a rearview mirror design with both drag reduction and noise reduction and energy recovery functions; on the one hand, the separation plate arranged at the front end of the rearview mirror is used to promote the boundary layer disturbance of the flow field of the rearview mirror and delay the separation of its tail. The formation of the zone, so as to achieve the purpose of reducing air resistance. On the other hand, a vibration energy recovery device is installed on the partition to absorb the vibration energy of high-speed airflow and realize energy recovery.

一种减阻节能后视镜罩,包括后视镜壳体分隔板、压电材料和底座组成;后视镜壳体通过底座安装在车身上;分隔板设置在后视镜壳体的前端面上;分隔板的两侧上均设置一层压电材料;压电材料产生的电能从安装在底座内部的电极引出,经由整流电路后传输至储能装置。当车辆在行驶过程中,在分隔板左右两侧会形成不稳定流场,会导致左右两侧产生压差和振动,压电材料可对压差产生的能量进行捕获,获取的能量通过整流电路传输至能量存储装置。此外,在分隔板两侧产生的旋涡结构作用下,增强了后视镜流场的边界层扰动,扰动产生的小尺度湍流结构能够促进边界层从层流向湍流的转捩,推迟了后端分离区的形成,减小尾流旋涡强度,能够有效的减小压差阻力和噪声。A drag-reducing and energy-saving rearview mirror cover, comprising a rearview mirror housing partition plate, piezoelectric material and a base; the rearview mirror housing is mounted on a vehicle body through the base; the partition plate is arranged on the rearview mirror housing A layer of piezoelectric material is arranged on both sides of the separation plate; the electric energy generated by the piezoelectric material is drawn out from the electrode installed inside the base, and transmitted to the energy storage device through the rectifier circuit. When the vehicle is driving, an unstable flow field will be formed on the left and right sides of the partition plate, which will cause pressure difference and vibration on the left and right sides. The piezoelectric material can capture the energy generated by the pressure difference, and the obtained energy is rectified through rectification. The circuit transmits to the energy storage device. In addition, under the action of the vortex structure generated on both sides of the dividing plate, the boundary layer disturbance of the flow field of the rearview mirror is enhanced, and the small-scale turbulent flow structure generated by the disturbance can promote the transition of the boundary layer from laminar flow to turbulent flow, delaying the rear end. The formation of the separation zone reduces the strength of the wake vortex, which can effectively reduce the differential pressure resistance and noise.

分隔板的个数既可以是一个,也可以是多个,分隔板的个数可结合不同类型的后视镜进行设置。The number of the partition plates can be one or more, and the number of the partition plates can be set in combination with different types of rearview mirrors.

进一步的,所述分隔板的个数为1个,设置在后视镜壳体的中央,与后视镜壳体一体成型。Further, the number of the partition plates is one, which is arranged in the center of the rear-view mirror housing, and is integrally formed with the rear-view mirror housing.

进一步的,所述后视镜壳体由外壳体和内壳体组成的空心壳体,在外壳体上设置有空气入口,空气入口的两侧均设置有分隔板。优选的,可以在后视镜壳体的后端面上设置有若干空气出口,利用内外壳体形成的气流通道从后视镜后端射出空气,进一步增强了对后视镜边界层的扰动;Further, the rearview mirror casing is a hollow casing composed of an outer casing and an inner casing, an air inlet is arranged on the outer casing, and partition plates are arranged on both sides of the air inlet. Preferably, a plurality of air outlets may be provided on the rear end surface of the rearview mirror housing, and air is ejected from the rear end of the rearview mirror by using the airflow channels formed by the inner and outer housings, which further enhances the disturbance to the boundary layer of the rearview mirror;

进一步的,所述压电材料的厚度取决于PVDF高分子膜的层数,一般为4-6层的聚偏氟乙烯PVDF高分子膜。Further, the thickness of the piezoelectric material depends on the number of layers of the PVDF polymer film, which is generally 4-6 layers of polyvinylidene fluoride PVDF polymer film.

进一步的,压电材料黏贴在分隔板上。Further, the piezoelectric material is pasted on the separator.

进一步的,后视镜的特征宽度用D表示时,分隔板的宽度d以 0.05D为宜,分隔板的长度L≤0.6D。Further, when the characteristic width of the rearview mirror is represented by D, the width d of the partition plate is preferably 0.05D, and the length of the partition plate L≤0.6D.

进一步的,为了获取足够的压电作用面积,分隔板的投影高度 H略高于后视镜罩高度h。Further, in order to obtain a sufficient piezoelectric action area, the projected height H of the partition plate is slightly higher than the height h of the rearview mirror cover.

有益效果:Beneficial effects:

(1)本发明通过在后视镜前端安装分隔板,增强了后视镜流场的边界层扰动,推迟后视镜后端分离区的形成,能够有效的减小压差阻力。(1) The present invention enhances the boundary layer disturbance of the flow field of the rearview mirror by installing the partition plate at the front end of the rearview mirror, delays the formation of the separation zone at the rear end of the rearview mirror, and can effectively reduce the differential pressure resistance.

(2)利用贴附在分隔板上的压电材料和能量回收装置吸收分隔板两侧压差场所的能量,能够更进一步减小汽车能耗。(2) The piezoelectric material and the energy recovery device attached to the partition plate are used to absorb the energy of the pressure difference on both sides of the partition plate, which can further reduce the energy consumption of the automobile.

附图说明Description of drawings

附图用来提供对本发明的进一步理解,并且构成说明书的一部分,与本发明的实施例一起用于解释本发明,并不构成对本发明的限制。在附图中:The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

图1是本发明的结构示意图;Fig. 1 is the structural representation of the present invention;

图2是本发明实施例1的主视结构示意图;Fig. 2 is the front view structure schematic diagram of Embodiment 1 of the present invention;

图3是本发明实施例1的后视结构示意图;Fig. 3 is the rear view structure schematic diagram of Embodiment 1 of the present invention;

图4是本发明未安装分隔板时后视镜流场的示意图;Fig. 4 is the schematic diagram of rearview mirror flow field when dividing plate is not installed in the present invention;

图5是本发明实示例1分隔板对后视镜流场影响的示意图;5 is a schematic diagram of the influence of a partition plate on the flow field of the rearview mirror in Example 1 of the present invention;

图6是本发明实示例2的主视结构示意图;Fig. 6 is the front view structure schematic diagram of Example 2 of the present invention;

图7是本发明实示例2的侧视结构示意图;Fig. 7 is the side view structure schematic diagram of Example 2 of the present invention;

图8是本发明实示例2中后视镜内壳体的主视结构示意图;8 is a schematic front view of the inner housing of the rearview mirror in Example 2 of the present invention;

图9是本发明实示例2中后视镜内壳体的后视结构示意图;9 is a schematic view of the rear view structure of the inner housing of the rearview mirror in Example 2 of the present invention;

图10是本发明实施例2中的分隔板对后视镜流场影响的示意图;10 is a schematic diagram of the influence of the partition plate in Embodiment 2 of the present invention on the flow field of the rearview mirror;

其中,1、后视镜壳体;2、分隔板;3、压电材料;4、底座; 5、电极;6、空气入口;7、空气出口;8、能量存储装置;9、内外壳体形成的腔体。Among them, 1. rearview mirror housing; 2. dividing plate; 3. piezoelectric material; 4. base; 5. electrode; 6. air inlet; 7. air outlet; 8. energy storage device; 9. inner casing cavity formed by the body.

具体实施方式Detailed ways

以下结合附图对本发明的优选实施例进行说明,应当理解,此处所描述的优选实施例仅用于说明和解释本发明,并不用于限定本发明。The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

实施例1Example 1

如图1-3所示:一种减阻节能后视镜罩,包括后视镜壳体1分隔板2、压电材料3和底座4组成;后视镜壳体1通过底座4安装在车身上;分隔板2设置在后视镜壳体1的前端面上;分隔板2的两侧上均设置一层压电材料3;压电材料产生的电能从安装在底座 4内部的电极5引出,经由整流电路后传输至储能装置8。分隔板 2的个数为1个,设置在后视镜壳体1的前端面的中央,与后视镜壳体1一体成型。后视镜的特征宽度用D表示时,分隔板2的宽度d为0.05D,长度L不超过0.6D。压电材料的厚度为5层PVDF高分子膜,分隔板的投影高度H应略高于后视镜罩高度h,本例中 H=1.1h。As shown in Figure 1-3: a drag-reducing and energy-saving rearview mirror cover, comprising a rearview mirror housing 1, a partition plate 2, a piezoelectric material 3 and a base 4; the rearview mirror housing 1 is installed on the On the vehicle body; the partition plate 2 is arranged on the front end surface of the rearview mirror housing 1; a layer of piezoelectric material 3 is arranged on both sides of the partition plate 2; The electrode 5 is led out and transmitted to the energy storage device 8 after passing through the rectifier circuit. The number of the partition plate 2 is one, it is provided at the center of the front end surface of the mirror housing 1, and is integrally formed with the mirror housing 1. When the characteristic width of the rear-view mirror is represented by D, the width d of the partition plate 2 is 0.05D, and the length L does not exceed 0.6D. The thickness of the piezoelectric material is 5 layers of PVDF polymer film, and the projection height H of the partition plate should be slightly higher than the height h of the rearview mirror cover. In this example, H=1.1h.

图4中可以看出,在分隔板两侧产生的旋涡结构作用下,增强了后视镜流场的边界层扰动,扰动产生的小尺度湍流结构能够促进边界层从层流向湍流的转捩,推迟了后端分离区的形成,减小尾流旋涡强度,能够有效的减小压差阻力和噪声。同时利用贴附在分隔板上的压电材料和能量回收装置吸收分隔板两侧压差场所的能量,能够更进一步减小汽车能耗。It can be seen from Fig. 4 that under the action of the vortex structure generated on both sides of the partition plate, the boundary layer disturbance of the flow field of the rearview mirror is enhanced, and the small-scale turbulent flow structure generated by the disturbance can promote the transition of the boundary layer from laminar flow to turbulent flow , delaying the formation of the rear-end separation zone, reducing the wake vortex intensity, and effectively reducing the differential pressure resistance and noise. At the same time, the piezoelectric material and the energy recovery device attached to the partition plate are used to absorb the energy of the pressure difference on both sides of the partition plate, which can further reduce the energy consumption of the vehicle.

实施例2Example 2

如图6所示:一种减阻节能后视镜罩,包括后视镜壳体1分隔板2、压电材料3和底座4组成;后视镜壳体1通过底座4安装在车身上;分隔板2设置在后视镜壳体1的前端面上;分隔板2的两侧上均设置一层压电材料3;后视镜壳体1由外壳体1-1和内壳体1- 2组成的空心壳体,在后视镜壳体1的后端面上设置有若干空气出口7,在外壳体1-1上设置有空气入口6,空气入口6的两侧均设置有分隔板2。本实施例与实施例1的主要区别在于本实例从后视镜前端面即迎风面引入高速空气,利用内外壳体形成的气流通道从后视镜后端射出空气,进一步增强了对后视镜边界层的扰动。同时在空气入口6两侧安装了分隔板,一方面增加了压电能量回收的面积另一方面也有利于形成进入空气入口气流通道。后视镜内壳体的主视图和后视图如图8和图9所示,利用内外壳体形成的腔体9把气流引导至后视镜后端面出口7,射出空气,从而增加流场扰动。As shown in Figure 6: a drag-reducing and energy-saving rearview mirror cover, comprising a rearview mirror housing 1, a partition plate 2, a piezoelectric material 3 and a base 4; the rearview mirror housing 1 is installed on the vehicle body through the base 4 The dividing plate 2 is arranged on the front end surface of the rearview mirror housing 1; a layer of piezoelectric material 3 is provided on both sides of the dividing plate 2; The hollow shell composed of the body 1-2 is provided with a number of air outlets 7 on the rear end face of the rear-view mirror shell 1, and an air inlet 6 is provided on the outer shell 1-1, and both sides of the air inlet 6 are provided with Divider 2. The main difference between this embodiment and Embodiment 1 is that this embodiment introduces high-speed air from the front end face of the rearview mirror, that is, the windward face, and uses the airflow channel formed by the inner and outer casings to eject air from the rear end of the rearview mirror, which further enhances the visibility of the rearview mirror. perturbation of the boundary layer. At the same time, partition plates are installed on both sides of the air inlet 6, on the one hand, the area of piezoelectric energy recovery is increased, and on the other hand, it is also beneficial to form an air flow channel entering the air inlet. The front and rear views of the inner housing of the rearview mirror are shown in Figures 8 and 9. The cavity 9 formed by the inner and outer housings is used to guide the airflow to the rear end face outlet 7 of the rearview mirror, and the air is ejected, thereby increasing the disturbance of the flow field .

图10为实施例2对后视镜流场影响的示意图,从图中可以看从后视镜后端射出空气进一步增强了对后视镜边界层的扰动,能够进一步减小压差阻力,同时由于空气入口6两侧安装了分隔板2,进一步增加了压电能量回收的面积。Figure 10 is a schematic diagram of the influence of Embodiment 2 on the flow field of the rearview mirror. It can be seen from the figure that the air ejected from the rear end of the rearview mirror further enhances the disturbance to the boundary layer of the rearview mirror, which can further reduce the differential pressure resistance, and at the same time Since the partition plates 2 are installed on both sides of the air inlet 6, the area of piezoelectric energy recovery is further increased.

最后应说明的是:以上所述仅为本发明的优选实施例而已,并不用于限制本发明,尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。Finally, it should be noted that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the The technical solutions described in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (8)

1.一种减阻节能后视镜罩,其特征在于,包括后视镜壳体(1)分隔板(2)、压电材料(3)和底座(4)组成;后视镜壳体(1)通过底座(4)安装在车身上;分隔板(2)设置在后视镜壳体(1)的前端面上;分隔板(2)的两侧上均设置一层压电材料(3);压电材料产生的电能从安装在底座(4)内部的电极(5)引出,经由整流电路后传输至储能装置。1. A drag-reducing and energy-saving rearview mirror cover, characterized in that it comprises a rearview mirror housing (1) dividing plate (2), a piezoelectric material (3) and a base (4); the rearview mirror housing (1) Installed on the vehicle body through the base (4); the partition plate (2) is arranged on the front end surface of the rearview mirror housing (1); a layer of piezoelectric layer is arranged on both sides of the partition plate (2) Material (3); the electrical energy generated by the piezoelectric material is drawn out from an electrode (5) installed inside the base (4), and then transmitted to the energy storage device through a rectifier circuit. 2.如权利要求1所述的减阻节能后视镜罩,其特征在于,所述分隔板(2)的个数为1个,设置在后视镜壳体(1)的中央,与后视镜壳体(1)一体成型。2. The drag-reducing and energy-saving rearview mirror cover according to claim 1, characterized in that the number of the partition plates (2) is one, which is arranged in the center of the rearview mirror housing (1), and is the same as the one in the rearview mirror housing (1). The rearview mirror housing (1) is integrally formed. 3.如权利要求1所述的减阻节能后视镜罩,其特征在于,所述后视镜壳体(1)由外壳体(1-1)和内壳体(1-2)组成的空心壳体,在外壳体(1-1)上设置有空气入口(6),空气入口(6)的两侧均设置有分隔板(2)。3. The drag-reducing and energy-saving rearview mirror cover according to claim 1, wherein the rearview mirror housing (1) is composed of an outer housing (1-1) and an inner housing (1-2) In the hollow casing, an air inlet (6) is arranged on the outer casing (1-1), and partition plates (2) are arranged on both sides of the air inlet (6). 4.如权利要求3所述的减阻节能后视镜罩,其特征在于,在后视镜壳体(1)的后端面上设置有若干空气出口(7)。4. The drag-reducing and energy-saving rearview mirror cover according to claim 3, wherein a plurality of air outlets (7) are provided on the rear end surface of the rearview mirror housing (1). 5.如权利要求1所述的减阻节能后视镜罩,其特征在于,所述压电材料(3)为4-6层的聚偏氟乙烯PVDF高分子膜。5 . The drag reduction and energy saving rearview mirror cover according to claim 1 , wherein the piezoelectric material ( 3 ) is 4-6 layers of polyvinylidene fluoride (PVDF) polymer film. 6 . 6.如权利要求5所述的减阻节能后视镜罩,其特征在于,压电材料(3)黏贴在分隔板(2)上。6. The drag-reducing and energy-saving rearview mirror cover according to claim 5, wherein the piezoelectric material (3) is pasted on the partition plate (2). 7.如权利要求2或3所述的减阻节能后视镜罩,其特征在于,后视镜的特征宽度用D表示时,分隔板的宽度d为0.05D,分隔板的长度L≤0.6D。7. The drag reduction and energy saving rearview mirror cover according to claim 2 or 3, wherein when the characteristic width of the rearview mirror is represented by D, the width d of the partition plate is 0.05D, and the length L of the partition plate ≤0.6D. 8.如如权利要求2或3所述的减阻节能后视镜罩,其特征在于,分隔板的投影高度H略高于后视镜罩高度h。8 . The drag reduction and energy saving rearview mirror cover according to claim 2 or 3 , wherein the projection height H of the partition plate is slightly higher than the height h of the rearview mirror cover. 9 .
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JPH0211433A (en) * 1988-06-28 1990-01-16 Aisin Seiki Co Ltd Water drop removal device
US5132840A (en) * 1989-01-12 1992-07-21 Aisin Seiki Kabushiki Kaisha Cleaning apparatus for automotive rear view mirror
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