KR100783578B1 - Reflector of radar system for vehicle - Google Patents

Reflector of radar system for vehicle Download PDF

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Publication number
KR100783578B1
KR100783578B1 KR1020060115260A KR20060115260A KR100783578B1 KR 100783578 B1 KR100783578 B1 KR 100783578B1 KR 1020060115260 A KR1020060115260 A KR 1020060115260A KR 20060115260 A KR20060115260 A KR 20060115260A KR 100783578 B1 KR100783578 B1 KR 100783578B1
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South Korea
Prior art keywords
vehicle
layer
reflector
radar
dielectric constant
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KR1020060115260A
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Korean (ko)
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차동은
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현대자동차주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0134—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to imminent contact with an obstacle, e.g. using radar systems
    • 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
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/16—Anti-collision systems
    • G08G1/166—Anti-collision systems for active traffic, e.g. moving vehicles, pedestrians, bikes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R2021/0104—Communication circuits for data transmission
    • B60R2021/01102—Transmission method
    • B60R2021/01115—Transmission method specific data frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R2021/01308—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over monitoring distance between vehicle body and road

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mechanical Engineering (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

A vehicle radar system is provided to reflect radio wave generated from a radar transmitting/receiving unit toward a front portion of a vehicle by arranging a reflector with two layers having different dielectric constant in rear of the radar transmitting/receiving unit. A vehicle radar system includes a radar transmitting/receiving unit(30) and a reflector(40). The radar transmitting/receiving unit is interposed between a front grill cover(10) and a front end module(20) such that radio wave is generated from the radar transmitting/receiving unit toward a rear portion of a vehicle. The reflector is interposed between the front end module and the radar transmitting/receiving unit, and has a first layer(41) and a second layer(42) having different dielectric constant. The first layer and the second layer are stacked such that radio wave generated from the radar transmitting/receiving unit is reflected toward a front portion of the vehicle and radio wave reflected from an object existing in front of the vehicle is reflected to the radar transmitting/receiving unit.

Description

리플렉터를 갖는 차량용 레이다 시스템{Reflector of radar system for vehicle}Reflector of radar system for vehicle

도1은 본 발명의 리플렉터가 설치된 차량을 나타낸 도면;1 shows a vehicle equipped with a reflector of the present invention;

도2는 도1의 상세도이다.2 is a detailed view of FIG.

※도면의 주요부분에 대한 부호의 설명※※ Explanation of symbols about main part of drawing ※

10 : 전방 그릴커버 20 : 프론트앤드모듈10: front grille cover 20: front end module

30 : 레이다 송수신부 40 : 리플렉터30: radar transceiver 40: reflector

41 : 제1 층 42 : 제2 층41: first layer 42: second layer

본 발명은 리플렉터를 갖는 차량용 레이다 시스템에 관한 것이다.The present invention relates to a vehicle radar system having a reflector.

차량에 오토크루즈 기능 및 보행자 인식 기능을 부여하기 위한 다양한 연구와 시도가 이루어지고 있으며, 이는 차량 전방에 장착된 레이다 시스템에서 검출되는 선행 차량의 위치 및 거리 정보에 의해 스로틀밸브, 브레이크 및 변속기 등을 자동 제어하여 적절한 가감속을 수행함으로써 선행 차량과 적정 거리를 유지하는 구성에 의해 구현된다.Various researches and attempts have been made to give auto cruise and pedestrian recognition to vehicles, and the throttle valves, brakes and transmissions are controlled by the position and distance information of the preceding vehicle detected by the radar system installed in front of the vehicle. It is implemented by a configuration that maintains a proper distance from the preceding vehicle by performing an appropriate acceleration and deceleration by automatic control.

그리고, 선행 차량 등의 위치 및 거리 정보를 보다 정확하게 검출하여 상기한 기능의 신뢰도를 향상시키는 것이 중요하다.In addition, it is important to detect the position and distance information of the preceding vehicle more accurately to improve the reliability of the above-described function.

이를 위한 다양한 기술이 알려져 있으며, 대개 레이다 시스템을 구성하는 레이다 송수신부의 전방 부위에 전파 투과성이 있으면서 외장 부재로서의 기능도 수행하는 그릴커버의 구조 및 재질 등을 제시한다.Various techniques are known for this purpose, and the structure and the material of the grill cover, which also functions as an exterior member while transmitting radio waves to the front portion of the radar transceiver which usually constitutes the radar system, are presented.

일본 공개특허공보 2006-343172호에는 디자인을 고려하면서 레이다에서 나오는 전파를 투과할 수 있는 금속 증착 방법을 제시하고 있으며, 이 구성은, 기재층(AES), 가식체층(indium, tin)을 이루는 재질이 고가이므로 바람직하지 않다.Japanese Laid-Open Patent Publication No. 2006-343172 proposes a metal deposition method that can transmit radio waves from a radar while considering a design, and this configuration is a material forming a base layer (AES) and a decorative layer (indium, tin). It is not preferable because it is expensive.

일본 공개특허공보 2004-301592호에는 전파 투과용 커버의 수지부품 두께를 비유전율과 전파파장과의 관계를 고려하여 결정하고 있으며, 엠블렘부를 제외한 부분이 주로 라디에이터 냉각을 위해 그릴 형태로 개방됨으로써 설치 위치에 제약이 있다.Japanese Laid-Open Patent Publication No. 2004-301592 determines the thickness of the resin component of the cover for radio wave transmission in consideration of the relationship between the relative dielectric constant and the radio wave wavelength, and the installation position is mainly opened by the grille portion for cooling the radiator except for the emblem portion. There is a restriction.

그리고, 다른 종류의 기술로서, 일본 공개특허공보 2000-103283호가 알려져 있으며, 이는 차량 후방에 레이다 전파를 반사하기 위한 리플렉터(반사판)를 설치하여 후방에서 운행하는 차량이 레이다 전파를 안정적으로 흡수하도록 한 구성을 채택하고 있다. 그러나, 이러한 구성은 전방 차량이나 기타 물체를 보다 신뢰성 있게 검출하는 것에는 부적합하다.In addition, as another kind of technology, Japanese Patent Application Laid-Open No. 2000-103283 is known, which is provided with a reflector (reflecting plate) for reflecting radar radio waves at the rear of the vehicle so that the vehicle running in the rear can stably absorb radar radio waves. Adopt a configuration. However, such a configuration is unsuitable for more reliably detecting front vehicles or other objects.

따라서, 본 발명은 상기한 종래의 문제점을 해결하기 위한 것으로서, 차량의 전방에 설치된 레이다 송수신부와 프론트앤드모듈 사이에 접시 형상의 리플렉터를 설치함에 의해 그릴커버의 외장 기능에 영향을 미치지 않으면서 전파굴절 및 반사를 통해 선행 차량 등의 위치 및 거리 정보를 보다 정확하게 검출할 수 있는 리플렉터를 갖는 차량용 레이다 시스템을 제공하는 것을 그 목적으로 한다.Accordingly, the present invention is to solve the above-mentioned conventional problems, by providing a dish-shaped reflector between the radar transceiver and the front-end module installed in the front of the vehicle to propagate without affecting the exterior function of the grill cover It is an object of the present invention to provide a radar system for a vehicle having a reflector capable of more accurately detecting position and distance information of a preceding vehicle or the like through refraction and reflection.

상기한 목적을 달성하기 위한 기술적인 구성으로서, 본 발명은, 차량 전방에 장착된 레이다 송수신부에서 발생되어 차량 전방의 물체에 충돌한 후 되돌아오는 전파의 수신에 의해 선행 차량의 위치 및 거리 정보 등을 검출하는 차량용 레이다 시스템으로서, 상기 레이다 송수신부는 차량의 전방 그릴커버와 프론트앤드모듈의 사이에 배치되어 그로부터 발생된 전파가 차량의 후방 쪽으로 나가도록 설치되며, 상기 프론트앤드모듈과 레이다 송수신부의 사이에는 상기 레이다 송수신부에서 발생되어 차량의 후방 쪽으로 나가는 전파를 반사시켜 차량의 전방 쪽으로 나가게 하고 차량 전방의 물체에 충돌하여 되돌아오는 전파를 반사시켜 상기 레이다 송수신부에 모아져서 수신되도록 서로 다른 비유전율을 갖는 제1 층과 제2 층이 적층되어 원호형 단면을 갖도록 형성된 리플렉터가 배치되어 구성된, 리플렉터를 갖는 차량용 레이다 시스템을 특징으로 한다.As a technical configuration for achieving the above object, the present invention, the position and distance information of the preceding vehicle by the reception of radio waves generated by the radar transceiver mounted on the front of the vehicle and collided with the object in front of the vehicle, etc. A radar system for detecting a vehicle, wherein the radar transceiver is disposed between the front grill cover of the vehicle and the front end module so that radio waves generated therefrom are directed toward the rear of the vehicle, and between the front end module and the radar transceiver Reflecting the radio waves generated by the radar transceiver to the rear of the vehicle to the front of the vehicle and reflecting the radio waves coming back to collide with the object in front of the vehicle having a different relative dielectric constant so as to be collected by the radar transceiver received The first layer and the second layer are stacked to form an arcuate cross section A vehicle radar system having a reflector, which is arranged to be configured to have a reflector, is provided.

이하, 본 발명의 바람직한 일실시예를 첨부된 도면을 참조하여 보다 상세하게 설명하고자 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도1은 본 발명의 리플렉터가 설치된 차량을 나타낸 도면이며, 도2는 도1의 상세도이다.1 is a view showing a vehicle equipped with a reflector of the present invention, Figure 2 is a detailed view of FIG.

차량의 전방 그릴커버(10)와, 프론트앤드모듈(20)의 사이에 레이다 시스템을 이루는 레이다 송수신부(30)가 배치되며, 상기 레이다 송수신부(30)는 그로부터 발생된 전파가 차량의 후방 쪽으로 나가도록 설치된다.A radar transceiver 30 constituting a radar system is disposed between the front grill cover 10 of the vehicle and the front end module 20, and the radio wave generated from the radar transceiver 30 is directed toward the rear of the vehicle. Installed to exit.

그리고, 상기 프론트앤드모듈(20)과 레이다 송수신부(30)의 사이에 리플렉터(40)가 장착된다.A reflector 40 is mounted between the front end module 20 and the radar transceiver 30.

상기 리플렉터(40)는 원호형 단면을 갖도록 형성됨으로써 레이다 송수신부(30)에서 발생되어 차량의 후방 쪽으로 나가는 전파를 반사시켜 차량의 전방 쪽으로 나가도록 한다.The reflector 40 is formed to have an arcuate cross section so as to reflect the radio waves generated by the radar transceiver 30 toward the rear of the vehicle and exit toward the front of the vehicle.

이러한 리플렉터(40)는 비유전율이 동일하지 않은 2 종류의 물질이 적층된 형상을 가짐에 의해 전파의 반사가 이루어지게 한다.The reflector 40 has a shape in which two kinds of materials having different relative dielectric constants are stacked to allow reflection of radio waves.

즉, 상기 리플렉터(40)는 제1 층(41)과, 제2 층(42)이 적층되며, 이들 층(41)(42)은 서로 다른 비유전율을 갖는다. 이때, 제1 층(41)의 비유전율이 제2 층(42)의 비유전율에 비하여 상대적으로 크게 형성되거나, 제2 층(42)의 비유전율이 제1 층(41)의 비유전율에 비하여 상대적으로 크게 형성될 수 있다.That is, the reflector 40 has a first layer 41 and a second layer 42 are stacked, these layers 41, 42 have a different dielectric constant. In this case, the relative dielectric constant of the first layer 41 is formed to be relatively larger than the relative dielectric constant of the second layer 42, or the relative dielectric constant of the second layer 42 is compared to that of the first layer 41. It can be formed relatively large.

상기 제1 층(41)과 제2 층(42) 중 비유전율이 상대적으로 큰 재질로 형성되는 층은 비유전율이 2.7∼2.9인 재질, 예컨데 PC, PMMA, PPE, PVC, ABS로 이루어지며, 상기 제1 층(41)과 제2 층(42) 중 비유전율이 상대적으로 작은 재질로 형성되는 층은 비유전율이 2.1∼2.2인 재질, 예컨대 TPX, PP로 이루어진다.Among the first layer 41 and the second layer 42, a layer having a relatively high dielectric constant is formed of a material having a relative dielectric constant of 2.7 to 2.9, for example, PC, PMMA, PPE, PVC, and ABS. Among the first layer 41 and the second layer 42, a layer formed of a material having a relatively low relative dielectric constant is made of a material having a relative dielectric constant of 2.1 to 2.2, for example, TPX and PP.

이렇게 비유전율 차이가 적정값 이상으로 설정되면 레이다 전파의 반사율이 충분히 크게 형성되어 전방 그릴커버(10)를 통과하면서 산란된 레이다 전파가 리플렉터(40)에 의해 모아져서 레이다 송수신부(30)에 수신됨으로써 수신율이 높아진 다.When the relative dielectric constant difference is set to an appropriate value or more, the reflectance of the radar radio waves is sufficiently large, and the scattered radar radio waves are collected by the reflector 40 while passing through the front grill cover 10 and received by the radar transceiver 30. This increases the reception rate.

이와 같이 본 발명의 리플렉터(40)를 이루는 제1 층과 제2 층의 재질은 종래의 기술에서 제시된 인듐, 주석 등을 이용한 복합 피막층의 증착을 이용한 커버와 비교할 때 제조 비용의 획기적인 절감이 가능하다.Thus, the material of the first layer and the second layer constituting the reflector 40 of the present invention can significantly reduce the manufacturing cost compared to the cover using the deposition of the composite film layer using indium, tin, etc. proposed in the prior art. .

특히, 크롬 도금 등 일반적으로 이용되는 외장 부품을 이용할 때 전파 투과를 위해 필요한 부분의 다중 피막면 제조를 이용하지 않으면서 전파의 투과(즉, 산란된 전파의 수신)가 가능하게 한다.In particular, when using an exterior component commonly used such as chromium plating, it is possible to transmit the radio waves (that is, receive scattered radio waves) without using the multi-coated surface manufacturing of the portions necessary for radio wave transmission.

즉, 도시된 것처럼, 레이다 송수신부(30)에서 발생되어 차량의 후방 쪽으로 나가는 전파(L)가 리플렉터(40)에서 반사되어 차량의 전방 쪽으로 나감으로써 그릴커버의 외장 기능에 영향을 미치지 않으면서 전파굴절 및 반사를 통해 선행 차량 등의 위치 및 거리 정보를 정확하게 검출할 수 있다.That is, as shown, the radio wave (L) generated by the radar transceiver 30 to go toward the rear of the vehicle is reflected by the reflector 40 and exits toward the front of the vehicle to propagate without affecting the exterior function of the grill cover. Through the refraction and reflection it is possible to accurately detect the position and distance information of the preceding vehicle or the like.

상술한 바와 같이 본 발명에 따른 리플렉터를 갖는 차량용 레이다 시스템에 의하면, 전파를 차량의 후방 쪽으로 나가도록 전방 그릴커버와 프론트앤드모듈의 사이에 설치된 레이다 송수신부의 후방에 비유전율이 다른 2개의 층이 적층되어 원호형 단면을 갖도록 형성된 리플렉터가 배치됨으로써 레이다 송수신부에서 발생되어 차량의 후방 쪽으로 나가는 전파를 차량의 전방 쪽으로 반사시키며, 또한 차량 전방의 물체에 충돌하여 되돌아오는 전파가 전방 그릴커버를 통과하면서 산란되어도 리플렉터에 의해 모아져서 레이다 송수신부에 수신됨으로써 높은 수신율을 갖는다.As described above, according to the radar system for a vehicle having a reflector according to the present invention, two layers having different relative dielectric constants are laminated on the rear of the radar transceiver provided between the front grill cover and the front end module so that radio waves are directed toward the rear of the vehicle. Reflectors formed to have an arcuate cross section are disposed to reflect the radio waves generated by the radar transceiver to the rear of the vehicle toward the front of the vehicle, and also scattered as the radio waves collide with objects in front of the vehicle through the front grill cover. Even if it is, it is collected by the reflector and received by the radar transceiver to have a high reception rate.

Claims (3)

차량 전방에 장착된 레이다 송수신부에서 발생되어 차량 전방의 물체에 충돌한 후 되돌아오는 전파의 수신에 의해 선행 차량의 위치 및 거리 정보 등을 검출하는 차량용 레이다 시스템으로서,A radar system for a vehicle that detects position and distance information of a preceding vehicle by receiving a radio wave generated by a radar transceiver mounted in front of a vehicle and colliding with an object in front of the vehicle. 상기 레이다 송수신부(30)는 차량의 전방 그릴커버(10)와 프론트앤드모듈(20)의 사이에 배치되어 그로부터 발생된 전파가 차량의 후방 쪽으로 나가도록 설치되며, 상기 프론트앤드모듈(20)과 레이다 송수신부(30)의 사이에는 상기 레이다 송수신부(30)에서 발생되어 차량의 후방 쪽으로 나가는 전파를 반사시켜 차량의 전방 쪽으로 나가게 하고 차량 전방의 물체에 충돌하여 되돌아오는 전파를 반사시켜 상기 레이다 송수신부(30)에 모아져서 수신되도록 서로 다른 비유전율을 갖는 제1 층(41)과 제2 층(42)이 적층되어 원호형 단면을 갖도록 형성된 리플렉터(40)가 배치되어 구성된, 리플렉터를 갖는 차량용 레이다 시스템.The radar transmitting and receiving unit 30 is disposed between the front grill cover 10 and the front end module 20 of the vehicle is installed so that the radio waves generated therefrom to the rear of the vehicle, the front end module 20 and Between the radar transceiver 30, the radar transceiver 30 reflects the radio waves generated toward the rear of the vehicle to the front of the vehicle to reflect the radio waves coming back by colliding with an object in front of the vehicle to transmit and receive the radar For a vehicle having a reflector, the reflector 40 formed by stacking the first layer 41 and the second layer 42 having different relative dielectric constants and having an arcuate cross section so as to be collected and received in the unit 30 is arranged. Radar system. 제1항에 있어서, 상기 리플렉터(40)는, 상기 제1 층(41)과 제2 층(42) 중 비유전율이 상대적으로 큰 층이 2.7∼2.9의 비유전율을 가지며, 상기 제1 층(41)과 제2 층(42) 중 비유전율이 상대적으로 작은 층이 2.1∼2.2의 비유전율을 가짐을 특징으로 하는 리플렉터를 갖는 차량용 레이다 시스템.According to claim 1, wherein the reflector 40, the relatively high dielectric constant of the first layer 41 and the second layer 42 has a relative dielectric constant of 2.7 to 2.9, the first layer ( 41) and the radar system for a vehicle having a reflector, wherein a layer having a relatively low relative dielectric constant has a relative dielectric constant of 2.1 to 2.2. 제1항 또는 제2항에 있어서, 상기 제1 층(41)과 제2 층(42) 중 비유전율이 상대적으로 큰 층은 PC, PMMA, PPE, PVC, ABS의 어느 하나로 형성되며, 상기 제1 층(41)과 제2 층(42) 중 비유전율이 상대적으로 작은 층은 TPX, PP의 어느 하나로 형성됨을 특징으로 하는 리플렉터를 갖는 차량용 레이다 시스템.According to claim 1 or 2, wherein the relatively high relative dielectric constant of the first layer 41 and the second layer 42 is formed of any one of PC, PMMA, PPE, PVC, ABS, Vehicle radar system with a reflector, characterized in that the relatively low relative dielectric constant of the first layer (41) and the second layer (42) is formed of either TPX, PP.
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US20150109162A1 (en) * 2013-10-17 2015-04-23 Robert Bosch Gmbh Combination of radar sensor and trim component for a motor vehicle
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