CN108016388A - A kind of bumper suitable for vehicle-mounted millimeter wave radar - Google Patents
A kind of bumper suitable for vehicle-mounted millimeter wave radar Download PDFInfo
- Publication number
- CN108016388A CN108016388A CN201711193374.XA CN201711193374A CN108016388A CN 108016388 A CN108016388 A CN 108016388A CN 201711193374 A CN201711193374 A CN 201711193374A CN 108016388 A CN108016388 A CN 108016388A
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- Prior art keywords
- vehicle
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- millimeter wave
- bumper
- radar
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- 239000002966 varnish Substances 0.000 claims abstract description 19
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 238000005457 optimization Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/023—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/48—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds
- B60R19/483—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds with obstacle sensors of electric or electronic type
Abstract
The present invention relates to a kind of bumper suitable for vehicle-mounted millimeter wave radar, it includes outside plate, the outside plate includes plastic base, prime coat, top coat layer and the layer of varnish being sequentially stacked, wherein, the relation between the medium wavelength of the plastic base, prime coat, top coat layer and layer of varnish and its respective relative dielectric constant is satisfied by formula：N=1,2,3,4.The bumper of the present invention can be installed on vehicle-mounted millimeter wave radar front end, it not only may insure the aesthetics of vehicle overall appearance, and on the one hand it can increase the transmissivity that vehicle-mounted millimeter wave radar sends electromagnetic wave, lift the detection range of radar, on the other hand reflection of the bumper to electromagnetic wave can be reduced, avoid radar from can not working because back wave is too strong, lift the working performance of radar.
Description
Technical field
The present invention relates to a kind of bumper, more particularly to a kind of bumper suitable for vehicle-mounted millimeter wave radar.
Background technology
In automatic Pilot, the intelligent automobile Development Technology of Basic Authorization and industry development path are that advanced auxiliary drives in the industry
(ADAS), part automatic Pilot, highly automated driving and complete unmanned, intelligent automobile stage.
ADAS systems are the basic function requirements of automatic Pilot, these active safety technologies are by using millimeter wave thunder
Reach, the advanced drive assist system of camera and laser radar sensor etc. is realized.
Millimetre-wave radar sensor is because its moderate cost, environmental suitability are strong and long-range detection ability is preferable at present
And as one of mainstream sensor.The universal mounting means of millimetre-wave radar sensor is mounted in absorption and relaxes foreign impacts
The advantages of power, the bumper rear, so installation of protection vehicle body front and rear part is will not to change because radar sensor is introduced
Become the configuration design of vehicle.
However, according to the result of actual measurement shows that, millimetre-wave radar work 77GHz frequency ranges near, electromagnetic wave vertical incidence
Reflected energy maximum during some bumpers can reach 35%, and bumper sends 77GHz vehicle-mounted millimeter wave radars at this time
Electromagnetic wave generates obvious Transmission Attenuation and reflection, and maximum causes detection range to reduce 20%.The problem of more serious is electromagnetism
The too strong reflection of ripple result in radar and produce false target, or even the consequence that system saturation radar can not detect.
77GHz Automobile Millimeter Wave Radars are mainly used in before adaptive cruise etc. to function at present, in order to evade above-mentioned guarantor
The counter productive that dangerous thick stick is brought, mainstream mounting means have：Bumper lower part near-earth formula, bumper fenestration, installed in wave transparent car
The scheme such as after mark.However, although first two scheme all avoids bumper, the liftoff mistake of radar sensor in the first scheme
Closely, so as to sacrifice radar performance, and second scheme sacrifices the good appearance and radar of vehicle then by radar outside
Environmental suitability.The third scheme is presently mainly use to plate indium logo to reduce reflection of electromagnetic wave, but this logo into
This height, and cause logo volume larger to adapt to radar illumination scope, aesthetics declines.
In addition, with the development of 77GHz radars, it will gradually substitute 24GHz millimeter wave thunders after vehicle into detection
Reach, thus by radar be installed on after vehicle to when, to be placed on bumper rear be even more optimal selection for selection.In view of mainstream is protected at present
In terms of the design of dangerous thick stick still rests on mechanical property, for electromagnetic performance design aspect, improving the Transmission Attenuation of millimeter wave
With do not have ripe clear and definite scheme on the problem of reflection, the present invention proposes a kind of increase millimeter wave transmissivity, reduces electromagnetism
The bumper of the reflection of ripple, so that millimetre-wave radar still has good working performance when being positioned over bumper rear.
The content of the invention
In order to solve the above-mentioned problems of the prior art, the present invention is intended to provide a kind of be suitable for vehicle-mounted millimeter wave radar
Bumper, with for millimeter wave realize it is low reflection, it is highly transmissive, solve traditional insurance thick stick to millimeter wave height attenuation, high reflection from
And the problem of causing vehicle-mounted millimeter wave radar data reduction to decline or even can not work.
A kind of bumper suitable for vehicle-mounted millimeter wave radar of the present invention, it includes outside plate, and the outside plate includes
Plastic base, prime coat, top coat layer and the layer of varnish being sequentially stacked, wherein, the plastic base, prime coat, top coat layer with
And the relation between the medium wavelength of layer of varnish and its respective relative dielectric constant is satisfied by formula (1)：
Wherein, λ represents the vacuum wavelength of respective frequencies, λdnRepresent the plastic base, prime coat, top coat layer and varnish
The medium wavelength of the respective frequencies of layer, εrnRepresent the respective frequencies of the plastic base, prime coat, top coat layer and layer of varnish
Relative dielectric constant, when n=1, are expressed as the plastic base, and when n=2 is expressed as the prime coat, and when n=3 is expressed as described
Top coat layer, when n=4, are expressed as the layer of varnish.
Above-mentioned suitable for the bumper of vehicle-mounted millimeter wave radar, the thickness d of the plastic base1Corresponding frequency
The medium wavelength X of rated1Relation meet formula (2)：
1.43λd1≤d1≤1.57λd1 (2)。
Above-mentioned suitable for the bumper of vehicle-mounted millimeter wave radar, the thickness d of the prime coat2Corresponding frequency
Medium wavelength Xd2Relation meet formula (3)：
2.57×10-3λd2≤d2≤5.13×10-3λd2 (3)。
Above-mentioned suitable for the bumper of vehicle-mounted millimeter wave radar, the thickness d of the top coat layer3Corresponding frequency
Medium wavelength Xd3Relation meet formula (4)：
6.79×10-3λd3≤d3≤1.358×10-2λd3 (4)。
Above-mentioned suitable for the bumper of vehicle-mounted millimeter wave radar, the thickness d of the layer of varnish4Corresponding frequency
Medium wavelength Xd4Relation meet formula (5)：
6.32×10-3λd4≤d4≤1.264×10-2λd4 (5)。
As a result of above-mentioned technical solution, the present invention is in the collision of traditional insurance thick stick, rigidity, thermal deformation, mode
On the basis of mechanics, thermal design, electromagnetic performance design, the i.e. material to the multilayer dielectricity in the outer plate material of bumper are introduced
The relation of matter, dielectric constant and thickness optimizes, and finally obtains a kind of bumper of highly transmissive, low reflection.The present invention's
Bumper can be installed on vehicle-mounted millimeter wave radar front end, not only may insure the aesthetics of vehicle overall appearance, but also a side
Face can increase the transmissivity that vehicle-mounted millimeter wave radar sends electromagnetic wave, lift the detection range of radar, on the other hand can be with
Reflection of the bumper to electromagnetic wave is reduced, avoids radar from can not working because back wave is too strong, lifts the working performance of radar.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of bumper suitable for vehicle-mounted millimeter wave radar of the invention.
Embodiment
Below in conjunction with the accompanying drawings, presently preferred embodiments of the present invention is provided, and is described in detail.
As shown in Figure 1, of the invention, i.e. a kind of bumper suitable for vehicle-mounted millimeter wave radar, including：Anti-collision beam and cover
Outside plate outside Gai Qi, wherein, outside plate includes plastic base 1, prime coat 2, top coat layer 3 and the layer of varnish 4 being sequentially stacked.
Specifically, plastic base 1, prime coat 2, top coat layer 3 and the medium wavelength of layer of varnish 4 and its is respective opposite
Relation between dielectric constant is satisfied by formula (1)：
Wherein, λ represents the vacuum wavelength of respective frequencies, λdnRepresent plastic base 1, prime coat 2, top coat layer 3 and varnish
The medium wavelength of the respective frequencies of layer 4, εrnRepresent the respective frequencies of plastic base 1, prime coat 2, top coat layer 3 and layer of varnish 4
Relative dielectric constant, when n=1 is expressed as being expressed as during plastic base 1, n=2 being expressed as top coat layer 3 during prime coat 2, n=3,
Layer of varnish 4 is expressed as during n=4.
Meanwhile the thickness d of plastic base 11The medium wavelength X of corresponding frequencyd1Relation meet formula (2)：
1.43λd1≤d1≤1.57λd1 (2)。
The thickness d of prime coat 22The medium wavelength X of corresponding frequencyd2Relation meet formula (3)：
2.57×10-3λd2≤d2≤5.13×10-3λd2 (3)。
The thickness d of top coat layer 33The medium wavelength X of corresponding frequencyd3Relation meet formula (4)：
6.79×10-3λd3≤d3≤1.358×10-2λd3 (4)。
The thickness d of layer of varnish 44The medium wavelength X of corresponding frequencyd4Relation meet formula (5)：
6.32×10-3λd4≤d4≤1.264×10-2λd4 (5)。
The design principle of the said structure of the present invention is as follows：In the bumper that multilayer dielectricity is formed, radar is sent
Electromagnetic wave multiple reflections and transmission are produced in each dielectric layer of bumper.By plastic base 1, prime coat 2, top coat layer 3 and clear
The dielectric constant and thickness of enamelled coating 4 are configured according to range above, then each layer reflected energy vector can be caused reversely to be superimposed,
So that reflected energy is mutually cut, so as to weaken reflected energy, transmission potential is lifted.Experiment shows, according to above dielectric constant and thickness
Degree relation manufacture processing bumper, can obtain the guarantor of a kind of high-transmission rate, antiradar reflectivity in 77GHz frequency ranges (bandwidth 2.6%)
Dangerous thick stick.
In conclusion the advantage of the invention is that：
(1) can be incited somebody to action according to principle analysis and measured result, the bumper of the invention after electromagnetic performance optimization design
The axial transmissivity of application of MMW radar frequency range, i.e. 77GHz frequency ranges (bandwidth 2.6%) is lifted to more than 98% (experimental result
It is as shown in table 1 below), so as to improve the detection range scope of millimetre-wave radar system.
(2) can be incited somebody to action according to principle analysis and measured result, the bumper of the invention after electromagnetic performance optimization design
Application of MMW radar frequency range, the i.e. axial reflectivities of 77GHz frequency ranges (bandwidth 2.6%) drop within 2% that (experimental result is such as
Shown in table 1 below), asked so as to avoid what bumper back wave false target caused by too strong and radar system saturation can not work
Topic.
Certain the vehicle bumper optimization situation test table of table 1
| Certain vehicle bumper | Reflected energy percentage | Transmission potential percentage |
| Before optimization | 29.8% | 70.2% |
| After optimization | 1.4% | 98.6% |
Note：Experiment is using vehicle bumper reflectance factor during vector network analyzer test 77GHz.
It is above-described, it is only presently preferred embodiments of the present invention, is not limited to the scope of the present invention, of the invention is upper
Stating embodiment can also make a variety of changes.What i.e. every claims and description according to the present patent application were made
Simply, equivalent changes and modifications, falls within the claims of patent of the present invention.The not detailed description of the present invention is
Routine techniques content.
Claims (5)
1. a kind of bumper suitable for vehicle-mounted millimeter wave radar, it includes outside plate, it is characterised in that the outside plate is included successively
Stacked plastic base, prime coat, top coat layer and layer of varnish, wherein, the plastic base, prime coat, top coat layer and clear
Relation between the medium wavelength of enamelled coating and its respective relative dielectric constant is satisfied by formula (1)：
<mrow>
<msub>
<mi>&lambda;</mi>
<mrow>
<mi>d</mi>
<mi>n</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mi>&lambda;</mi>
<msqrt>
<msub>
<mi>&epsiv;</mi>
<mrow>
<mi>r</mi>
<mi>n</mi>
</mrow>
</msub>
</msqrt>
</mfrac>
<mo>,</mo>
<mi>n</mi>
<mo>=</mo>
<mn>1</mn>
<mo>,</mo>
<mn>2</mn>
<mo>,</mo>
<mn>3</mn>
<mo>,</mo>
<mn>4</mn>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
<mo>,</mo>
</mrow>
Wherein, λ represents the vacuum wavelength of respective frequencies, λdnRepresent the plastic base, prime coat, top coat layer and layer of varnish
The medium wavelength of respective frequencies, εrnRepresent the opposite of the respective frequencies of the plastic base, prime coat, top coat layer and layer of varnish
Dielectric constant, when n=1, are expressed as the plastic base, and when n=2 is expressed as the prime coat, and when n=3 is expressed as the finishing coat
Layer, when n=4, are expressed as the layer of varnish.
2. the bumper according to claim 1 suitable for vehicle-mounted millimeter wave radar, it is characterised in that the plastic base
Thickness d1The medium wavelength X of corresponding frequencyd1Relation meet formula (2)：
1.43λd1≤d1≤1.57λd1 (2)。
3. the bumper according to claim 1 suitable for vehicle-mounted millimeter wave radar, it is characterised in that the prime coat
Thickness d2The medium wavelength X of corresponding frequencyd2Relation meet formula (3)：
2.57×10-3λd2≤d2≤5.13×10-3λd2 (3)。
4. the bumper according to claim 1 suitable for vehicle-mounted millimeter wave radar, it is characterised in that the top coat layer
Thickness d3The medium wavelength X of corresponding frequencyd3Relation meet formula (4)：
6.79×10-3λd3≤d3≤1.358×10-2λd3 (4)。
5. the bumper according to claim 1 suitable for vehicle-mounted millimeter wave radar, it is characterised in that the layer of varnish
Thickness d4The medium wavelength X of corresponding frequencyd4Relation meet formula (5)：
6.32×10-3λd4≤d4≤1.264×10-2λd4 (5)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711193374.XA CN108016388A (en) | 2017-11-24 | 2017-11-24 | A kind of bumper suitable for vehicle-mounted millimeter wave radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711193374.XA CN108016388A (en) | 2017-11-24 | 2017-11-24 | A kind of bumper suitable for vehicle-mounted millimeter wave radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108016388A true CN108016388A (en) | 2018-05-11 |
Family
ID=62080177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711193374.XA Pending CN108016388A (en) | 2017-11-24 | 2017-11-24 | A kind of bumper suitable for vehicle-mounted millimeter wave radar |
Country Status (1)
| Country | Link |
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| CN (1) | CN108016388A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112364503A (en) * | 2020-11-10 | 2021-02-12 | 东风汽车集团有限公司 | Simulation analysis evaluation method for electromagnetic characteristics of automobile bumper |
| EP3798676A1 (en) | 2019-09-24 | 2021-03-31 | Veoneer Sweden AB | A radar side-shield and a radar transceiver assembly |
| EP3855565A1 (en) * | 2020-01-27 | 2021-07-28 | Motherson Innovations Company Limited | External cladding component of a vehicle, vehicle comprising such an external cladding component and method for manufacturing such an external cladding component |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2151889A1 (en) * | 2008-08-01 | 2010-02-10 | Audi AG | Radome for a radar sensor in a motor vehicle |
| CN104103877A (en) * | 2014-06-24 | 2014-10-15 | 中国电子科技集团公司第十研究所 | Impedance frequency select surface |
| CN104648296A (en) * | 2013-10-17 | 2015-05-27 | 罗伯特·博世有限公司 | Combination of radar sensor and trim component for a motor vehicle |
| CN207550123U (en) * | 2017-11-24 | 2018-06-29 | 华域汽车系统股份有限公司 | A kind of bumper suitable for vehicle-mounted millimeter wave radar |
-
2017
- 2017-11-24 CN CN201711193374.XA patent/CN108016388A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2151889A1 (en) * | 2008-08-01 | 2010-02-10 | Audi AG | Radome for a radar sensor in a motor vehicle |
| CN104648296A (en) * | 2013-10-17 | 2015-05-27 | 罗伯特·博世有限公司 | Combination of radar sensor and trim component for a motor vehicle |
| CN104103877A (en) * | 2014-06-24 | 2014-10-15 | 中国电子科技集团公司第十研究所 | Impedance frequency select surface |
| CN207550123U (en) * | 2017-11-24 | 2018-06-29 | 华域汽车系统股份有限公司 | A kind of bumper suitable for vehicle-mounted millimeter wave radar |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3798676A1 (en) | 2019-09-24 | 2021-03-31 | Veoneer Sweden AB | A radar side-shield and a radar transceiver assembly |
| WO2021058450A1 (en) | 2019-09-24 | 2021-04-01 | Veoneer Sweden Ab | A radar side-shield and a radar transceiver assembly |
| EP3855565A1 (en) * | 2020-01-27 | 2021-07-28 | Motherson Innovations Company Limited | External cladding component of a vehicle, vehicle comprising such an external cladding component and method for manufacturing such an external cladding component |
| CN112364503A (en) * | 2020-11-10 | 2021-02-12 | 东风汽车集团有限公司 | Simulation analysis evaluation method for electromagnetic characteristics of automobile bumper |
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