JPH10206521A - Distance-measuring device - Google Patents
Distance-measuring deviceInfo
- Publication number
- JPH10206521A JPH10206521A JP9009174A JP917497A JPH10206521A JP H10206521 A JPH10206521 A JP H10206521A JP 9009174 A JP9009174 A JP 9009174A JP 917497 A JP917497 A JP 917497A JP H10206521 A JPH10206521 A JP H10206521A
- Authority
- JP
- Japan
- Prior art keywords
- radar
- antenna
- air
- distance
- radar head
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Landscapes
- Radar Systems Or Details Thereof (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は距離計測装置に関す
る。The present invention relates to a distance measuring device.
【０００２】[0002]
【従来の技術】従来より、先行車両までの距離を計測
し、前方車両へ近づきすぎた場合に警報を発生する装
置、あるいはこれらの先行車両との距離を維持しつつ、
もしくは衝突を避けながら車両を走行させるシステムが
研究・開発されている。このような走行システムのため
の距離を計測する手段として、特開平4−289482 号公報
に見られるような電波レーダや、特公昭61−6349号公報
に見られる光レーダが開発されてきている。2. Description of the Related Art Conventionally, a device that measures a distance to a preceding vehicle and issues an alarm when the vehicle approaches a preceding vehicle too much, or while maintaining the distance to the preceding vehicle,
Alternatively, a system for running a vehicle while avoiding a collision has been researched and developed. As means for measuring the distance for such a traveling system, a radio wave radar as disclosed in JP-A-4-289482 and an optical radar as disclosed in JP-B-61-6349 have been developed.
【０００３】これらの距離計測装置のレーダヘッド部分
については、車間距離を計測するという必要性から、雨
や雪などの外界の環境にさらされる車体前部に取り付け
られる場合が多くある。このような環境下でもレーダヘ
ッドが正常に動作するように、例えば光レーダの場合で
は、送受光するガラス前面の汚れを除去するために空気
をレーダユニットの外部から吹き付ける方法が実公平6
−9920 号公報に記載されている。さらに、光レーダの
前面レンズを熱線等で加熱して、レンズ表面の水滴の付
着や凍結を防ぐ方法が特開平5−157830 号や特開平8−2
9535号公報に記載されている。また、光レーダを車室内
ダッシュボードに設置した場合に、デフロスタからの温
風をレーダユニットの外部から吹き付ける方法が特開平
7−260936号公報に記載されている。[0003] The radar head of these distance measuring devices is often mounted on the front of a vehicle body that is exposed to an external environment such as rain or snow because of the necessity of measuring the distance between vehicles. In order to operate the radar head normally even in such an environment, for example, in the case of an optical radar, a method of blowing air from the outside of the radar unit to remove dirt on the front surface of the glass that transmits and receives light is actually fair.
No. 9920. Further, a method of heating the front lens of an optical radar with a heat ray or the like to prevent the attachment or freezing of water droplets on the lens surface is disclosed in Japanese Patent Laid-Open Nos. 5-157830 and 8-2830.
No. 9535. Further, when an optical radar is installed on a dashboard in a vehicle cabin, a method of blowing hot air from a defroster from the outside of the radar unit is disclosed in Japanese Patent Application Laid-Open (JP-A) no.
No. 7,260,936.
【０００４】[0004]
【発明が解決しようとする課題】しかし、水滴の付着や
凍結を防ぐために熱線ヒータやフィルムをレーダ前面に
使用することは、電波レーダの場合では、電波の送受信
の妨げとなるという問題や、レーダユニットの外部から
空気を吹き付ける場合は空気の吹き出し口が汚れにより
詰まる可能性があるという問題や、外部から温風を吹き
付けただけでは、レーダユニットの内部にある発信器ま
で暖めることができないという問題があった。また、電
波レーダは道路に対して平行に電波を送信する必要があ
るためにアンテナを路面に対して鉛直に取り付ける手段
が通常用いられ、その場合走行中に雪や汚れが付着しや
すいという問題があった。However, the use of a hot-wire heater or a film on the front of the radar in order to prevent water droplets from adhering or freezing, in the case of a radio wave radar, impedes the transmission and reception of radio waves. When air is blown from outside the unit, the air outlet may be clogged with dirt. was there. In addition, since radio wave radar needs to transmit radio waves in parallel to the road, means for mounting the antenna vertically on the road surface is usually used, and in that case, there is a problem that snow and dirt are easily attached during traveling. there were.
【０００５】本発明の目的は、距離計測用の電波レーダ
のレーダヘッドに雪や汚れが付着しにくいようにするこ
とと、低温時でも電波レーダのミリ波帯発信器が安定に
発信することのできる距離計測装置を提供することにあ
る。An object of the present invention is to make it difficult for snow and dirt to adhere to the radar head of a radio wave radar for distance measurement, and to stably transmit a millimeter wave band transmitter of the radio wave radar even at a low temperature. It is an object of the present invention to provide a distance measuring device that can perform the measurement.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、本発明は距離計測装置の電波レーダのヘッド部前面
へ内側から温風を吹き付けるという手段と、電波レーダ
ユニット内部の発信器に温風を吹き付ける手段と、電波
レーダのレーダヘッドの前面を鉛直面よりやや下向きに
傾ける手段と、レーダヘッド部の周囲に空気の流れを整
える部品を取り付ける手段とを持つことを特徴とする。In order to achieve the above object, the present invention provides a means for blowing warm air from the inside to the front of the head of a radio wave radar of a distance measuring device, and a method for applying a warm air to a transmitter inside a radio wave radar unit. , A means for inclining the front surface of the radar head of the radio wave radar slightly downward from the vertical plane, and a means for attaching a part for regulating the flow of air around the radar head portion.
【０００７】距離計測装置では、レーダヘッド部の前面
へ内側から温風を吹き込むことにより、電波の送受信を
妨げることなくレーダヘッド部への水滴や雪の付着及び
凍結を防ぐことができる。また、電波レーダの発信器に
直接温風を吹き付けることで、外気温が低い時でも発信
器の温度を上昇させて安定な発信出力を得られることが
できる。また、レーダヘッド部が下向きであるので雪や
汚れが付着しにくくなる。また、車両が走行時に空気が
スムーズに流れるため、レーダヘッド部への雪や汚れの
付着を防ぐことができる。[0007] In the distance measuring device, by blowing warm air into the front surface of the radar head from inside, it is possible to prevent water droplets and snow from adhering to the radar head and freezing without interrupting transmission and reception of radio waves. In addition, by blowing hot air directly onto the transmitter of the radio wave radar, a stable transmission output can be obtained by raising the temperature of the transmitter even when the outside air temperature is low. In addition, since the radar head is downward, it is difficult for snow and dirt to adhere. Further, since the air flows smoothly when the vehicle is running, it is possible to prevent snow and dirt from adhering to the radar head.
【０００８】[0008]
【発明の実施の形態】以下に本発明の実施例を図１から
図４を用いて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【０００９】図１は本発明装置の一実施例の構成を示す
説明図である。電波レーダのレーダヘッド部１は車の前
面に取り付けられ、発信器４から出力されるミリ波信号
をアンテナ２から車前方にミリ波帯の電波として放射
し、前方を走行中の車両や障害物等の物体から反射され
て返ってくる電波を再びアンテナ２で受信して、信号処
理回路５で信号処理を施すことで、前方の車両までの距
離や相対速度を計測する。レーダヘッド部１のアンテナ
２とアンテナカバー３のすき間へ、エアチューブ１３の
吹き出し口６が取り付けられている。エアチューブ１３
はヒータ８を介してファン９に接続されており、空気取
り入れ口１４でから取り入れられた空気をヒータ８で暖
めてアンテナカバー３とアンテナ２のすきまへ送ること
ができる。また、レーダヘッド内部への吹き出し口７を
設けて、ミリ波発信器４へ、ヒータ８で暖められた空気
を吹き付け、ミリ波発信器４を暖める。特に、温度セン
サ１０をレーダヘッド部１の内部にもつ場合には、温度
センサ１０で計測した温度データを信号ケーブル１１を
介してコントローラ１２へ送る。コントローラ１２で、
レーダヘッド部１が低温であると判断した場合には、フ
ァン９とヒータ８へ命令を送り、空気取り入れ口１４か
ら取り入れられた空気を暖めて、レーダヘッド内部へ吹
き出し口７を通して送り、ミリ波発信器４を暖めて安定
に動作させる。FIG. 1 is an explanatory view showing the configuration of an embodiment of the apparatus of the present invention. The radar head unit 1 of the radio wave radar is mounted on the front of the vehicle, radiates a millimeter wave signal output from the transmitter 4 from the antenna 2 to the front of the vehicle as a radio wave in the millimeter wave band, and the vehicle or obstacle running in front of the vehicle. The antenna 2 receives the radio wave reflected back from the object and the like again and performs signal processing in the signal processing circuit 5 to measure the distance to the vehicle ahead and the relative speed. An outlet 6 of an air tube 13 is attached to a gap between the antenna 2 and the antenna cover 3 of the radar head unit 1. Air tube 13
Is connected to the fan 9 via the heater 8, and the air taken in from the air inlet 14 can be heated by the heater 8 and sent to the gap between the antenna cover 3 and the antenna 2. Further, an outlet 7 is provided inside the radar head, and the air heated by the heater 8 is blown to the millimeter wave transmitter 4 to warm the millimeter wave transmitter 4. In particular, when the temperature sensor 10 is provided inside the radar head unit 1, the temperature data measured by the temperature sensor 10 is sent to the controller 12 via the signal cable 11. In the controller 12,
When it is determined that the temperature of the radar head unit 1 is low, a command is sent to the fan 9 and the heater 8 to warm the air taken in from the air intake port 14 and send the air to the inside of the radar head through the outlet port 7. The transmitter 4 is warmed to operate stably.
【００１０】また同様に、温度センサ１０で計測した温
度が低温であるとコントローラ１２が判断した場合に、
レーダヘッド前面のアンテナ２とアンテナカバー３のす
き間へ温風を吹き出し口６から吹き付けることで、アン
テナカバー３への水分の凍結や雪の付着を防ぐ。Similarly, when the controller 12 determines that the temperature measured by the temperature sensor 10 is low,
By blowing hot air from the outlet 6 to the gap between the antenna 2 and the antenna cover 3 on the front of the radar head, freezing of water and adhesion of snow to the antenna cover 3 are prevented.
【００１１】次の実施例について図２を用いて説明す
る。車両２０の前面に距離を計測する電波レーダのレー
ダヘッド部１が取り付けられている。レーダヘッド部１
は信号ケーブル１１で車両２０の居室内にある表示装置
２１へ接続される。レーダヘッド部１では、ミリ波帯の
信号を発信器４で発信してアンテナ２から電波を車両前
方へ放射する。前方を走行中の車両や障害物等の物体か
ら反射されて返ってくる電波を、アンテナ２で受信し
て、信号処理回路５で信号処理することで、前方車両ま
での距離や相対速度を計測する。計測された距離や相対
速度の情報をもとに、表示装置２１で、警報や距離の情
報を運転者に対して伝える。ここで、アンテナ２は道路
と並行に電波を放射する必要性から水平面に対して直角
に近い角度で取り付けられる。このとき、アンテナカバ
ー３の傾斜角を鉛直より大きく傾けた構成とすること
で、雪や泥等の汚れがアンテナカバー３へ付着しにくい
構造とする。The next embodiment will be described with reference to FIG. A radar head unit 1 of a radio wave radar for measuring a distance is mounted on a front surface of a vehicle 20. Radar head 1
Is connected to a display device 21 in the living room of the vehicle 20 by a signal cable 11. In the radar head unit 1, a signal in the millimeter wave band is transmitted by the transmitter 4, and a radio wave is emitted from the antenna 2 to the front of the vehicle. The radio wave reflected and returned from an object such as a vehicle or an obstacle traveling ahead is received by the antenna 2 and processed by the signal processing circuit 5 to measure a distance and a relative speed to the preceding vehicle. I do. Based on the information on the measured distance and the relative speed, the display device 21 informs the driver of an alarm and distance information. Here, the antenna 2 is mounted at an angle close to a right angle to the horizontal plane because of the need to radiate radio waves in parallel with the road. At this time, the antenna cover 3 has a configuration in which the inclination angle is inclined more than the vertical, so that dirt such as snow and mud does not easily adhere to the antenna cover 3.
【００１２】次の実施例につき図３を用いて説明する。
図２と同様に電波を車両前方へ放射して、前方の物体か
ら反射されて返ってくる電波を信号処理することで、距
離や相対速度を計測する。ここで、アンテナカバー３の
傾斜角は鉛直より大きく傾けた構成とするが、アンテナ
カバーの特性により、アンテナ１５からの電波の放射方
向が変化する場合がある。このため、レーダヘッド部１
から放射される電波が道路と平行に放射されるよう、あ
らかじめアンテナカバーの傾斜角と反対方向にアンテナ
１５の取り付け角を傾けた構成とする。The next embodiment will be described with reference to FIG.
As in FIG. 2, the distance and the relative speed are measured by radiating a radio wave to the front of the vehicle and performing signal processing on the radio wave reflected and returned from an object in front. Here, the antenna cover 3 is configured to be inclined at an angle larger than the vertical, but the radiation direction of the radio wave from the antenna 15 may change due to the characteristics of the antenna cover. Therefore, the radar head unit 1
The antenna 15 is tilted in the opposite direction to the tilt angle of the antenna cover so that the radio waves radiated from the antenna 15 are radiated parallel to the road.
【００１３】次の実施例につき図４を用いて説明する。
図４の場合も図２と同様に、車両２０の前面に車間距離
を計測する電波レーダのレーダヘッド部１が取り付けら
れており、レーダヘッド部１は信号ケーブル１１で車両
２０の居室内にある表示装置２１へ接続されている。こ
のとき、アンテナ２の前面部分のアンテナカバー３は、
アンテナ２と平行な構造とするが、アンテナカバー３の
周囲に空気の流れを整えるエアロパーツ２２，２３を取
り付ける。車両２０の走行時には、これらのエアロパー
ツ２２，２３の働きで、レーダヘッド部１の周囲の空気
がスムーズに流れ、雪や泥等の汚れがアンテナカバー３
へ付着しにくい。The next embodiment will be described with reference to FIG.
In the case of FIG. 4, similarly to FIG. 2, the radar head unit 1 of the radio wave radar for measuring the inter-vehicle distance is attached to the front of the vehicle 20, and the radar head unit 1 is located in the living room of the vehicle 20 by the signal cable 11. It is connected to the display device 21. At this time, the antenna cover 3 on the front part of the antenna 2 is
Although it has a structure parallel to the antenna 2, aero parts 22 and 23 for adjusting the flow of air are attached around the antenna cover 3. When the vehicle 20 travels, the air around the radar head 1 flows smoothly by the action of these aero parts 22 and 23, and dirt such as snow and mud is removed from the antenna cover 3.
Difficult to adhere to
【００１４】[0014]
【発明の効果】本発明によれば、レーダヘッド部の内部
へ温風を吹き込むため、レーダヘッドの前面へ雪が付着
しにくく、低温時でもミリ波発信器を温風で暖めて発信
を安定にする事ができ、また、レーダヘッド部のアンテ
ナカバーやその周囲の形状を工夫することで、アンテナ
ヘッドへの雪や汚れの付着を防ぐことができ、レーダ性
能への雪や汚れの影響を低減することができる。According to the present invention, since warm air is blown into the inside of the radar head, it is difficult for snow to adhere to the front of the radar head, and even at low temperatures, the millimeter-wave transmitter is warmed with warm air to stably transmit. By modifying the antenna cover of the radar head and its surrounding shape, it is possible to prevent snow and dirt from adhering to the antenna head and reduce the influence of snow and dirt on radar performance. can do.
【図１】レーダヘッド内部に温風を吹き込む距離計測装
置の一実施例を示す説明図。FIG. 1 is an explanatory view showing one embodiment of a distance measuring device for blowing hot air into a radar head.
【図２】レーダヘッド部のアンテナカバーを前下方へ傾
けた距離計測装置の一実施例を示す説明図。FIG. 2 is an explanatory diagram showing one embodiment of a distance measuring device in which an antenna cover of a radar head is inclined forward and downward.
【図３】レーダヘッド部のアンテナカバーを前下方へ傾
け、アンテナは逆方向へ傾けた距離計測装置の一実施例
を示す説明図。FIG. 3 is an explanatory diagram showing an embodiment of a distance measuring device in which an antenna cover of a radar head is tilted forward and downward and an antenna is tilted in a reverse direction.
【図４】レーダヘッド部のアンテナカバー周囲に空気の
流れを整える構造物を取り付けた距離計測装置の一実施
例を示す説明図。FIG. 4 is an explanatory view showing one embodiment of a distance measuring device in which a structure for regulating air flow is attached around an antenna cover of a radar head unit.
１…レーダヘッド部、２…アンテナ、３…アンテナカバ
ー、４…ミリ波発信器、５…信号処理回路、６，７…吹
き出し口、８…ヒータ、９…ファン、１０…温度セン
サ、１１…信号ケーブル、１２…コントローラ、１３…
エアチューブ、１４…空気取り入れ口。DESCRIPTION OF SYMBOLS 1 ... Radar head part, 2 ... Antenna, 3 ... Antenna cover, 4 ... Millimeter wave transmitter, 5 ... Signal processing circuit, 6,7 ... Outlet, 8 ... Heater, 9 ... Fan, 10 ... Temperature sensor, 11 ... Signal cable, 12 ... controller, 13 ...
Air tube, 14 ... air intake.
Claims (8)
の距離や相対速度を検出する電波レーダにおいて、レー
ダヘッド部の内部へ空気を送る手段を設けたことを特徴
とする距離計測装置。1. A radio wave radar which emits a radio wave and receives a reflected wave to detect a distance and a relative speed with respect to a forward object, and a means for sending air into a radar head unit is provided. apparatus.
内部へ暖められた空気を送る手段を持つ距離計測装置。2. A distance measuring apparatus according to claim 1, further comprising means for sending warmed air into said radar head.
バーの間へ空気を送る手段を持つ距離計測装置。3. The distance measuring device according to claim 1, further comprising means for sending air between the antenna and the antenna cover.
のミリ波発信器へ向けて暖められた空気を送る手段を持
つ距離計測装置。4. A distance measuring apparatus according to claim 1, further comprising means for sending warmed air to a millimeter wave transmitter inside said radar head.
レーダヘッド部の内部に温度センサを設置し、上記温度
センサの情報にもとづいて、送風する空気の温度や風量
を制御する手段を持つ距離計測装置。5. A means according to claim 1, wherein a temperature sensor is installed inside said radar head, and means for controlling the temperature and air volume of the air to be blown based on information from said temperature sensor. Distance measuring device to have.
の距離や相対速度を検出する電波レーダにおいて、レー
ダヘッド部内のアンテナを鉛直面とほぼ並行に取り付
け、アンテナカバー外面の傾斜角を鉛直より大きくした
構造とすることを特徴とする距離計測装置。6. A radio wave radar which emits a radio wave and receives a reflected wave to detect a distance and a relative speed with respect to a forward object, mounts an antenna in a radar head almost in parallel with a vertical surface, and tilts an outer surface of the antenna cover. A distance measuring device characterized by having a structure larger than vertical.
の距離や相対速度を検出するミリ波レーダにおいて、ア
ンテナカバー外面の傾斜角を鉛直より大きくし、レーダ
ヘッド部内のアンテナは上記アンテナカバー外面の傾斜
角と反対方向に傾けた構造とすることを特徴とする距離
計測装置。7. A millimeter wave radar which emits radio waves and receives reflected waves to detect a distance and a relative speed to a forward object, wherein an inclination angle of an outer surface of an antenna cover is set to be larger than a vertical angle, and an antenna in a radar head is provided with the antenna. A distance measuring device having a structure tilted in a direction opposite to a tilt angle of an outer surface of an antenna cover.
の距離や相対速度を検出するミリ波レーダにおいて、レ
ーダヘッド部の周囲に空気の流れをスムーズにする構造
物を取り付けたことを特徴とする距離計測装置。8. A millimeter wave radar which emits radio waves and receives reflected waves to detect a distance and a relative speed to a forward object, and a structure for smoothing the flow of air is provided around the radar head. A distance measuring device characterized by the above-mentioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9009174A JPH10206521A (en) | 1997-01-22 | 1997-01-22 | Distance-measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9009174A JPH10206521A (en) | 1997-01-22 | 1997-01-22 | Distance-measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10206521A true JPH10206521A (en) | 1998-08-07 |
Family
ID=11713221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9009174A Pending JPH10206521A (en) | 1997-01-22 | 1997-01-22 | Distance-measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10206521A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007171002A (en) * | 2005-12-22 | 2007-07-05 | Mitsubishi Fuso Truck & Bus Corp | Ultrasonic sensor system |
| JP2008074299A (en) * | 2006-09-22 | 2008-04-03 | Honda Motor Co Ltd | Water drop deposition suppression device of vehicular object detection means |
| CN102540179A (en) * | 2011-12-30 | 2012-07-04 | 上海德意达电子电器设备有限公司 | Internally-installed radar speed and distance measuring device |
| JP2017077804A (en) * | 2015-10-21 | 2017-04-27 | スズキ株式会社 | Front grille |
| JP2020153905A (en) * | 2019-03-22 | 2020-09-24 | サカエ理研工業株式会社 | Vehicle radar device |
| US11059458B2 (en) | 2018-08-08 | 2021-07-13 | Toyota Motor Engineering & Manufacturing North America, Inc. | System and method for cleaning obstructions for the sensors of an autonomous vehicle |
| JP2022039109A (en) * | 2020-08-27 | 2022-03-10 | 本田技研工業株式会社 | Movable body |
-
1997
- 1997-01-22 JP JP9009174A patent/JPH10206521A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007171002A (en) * | 2005-12-22 | 2007-07-05 | Mitsubishi Fuso Truck & Bus Corp | Ultrasonic sensor system |
| JP2008074299A (en) * | 2006-09-22 | 2008-04-03 | Honda Motor Co Ltd | Water drop deposition suppression device of vehicular object detection means |
| JP4704302B2 (en) * | 2006-09-22 | 2011-06-15 | 本田技研工業株式会社 | Water droplet adhesion suppression device for vehicle object detection means |
| CN102540179A (en) * | 2011-12-30 | 2012-07-04 | 上海德意达电子电器设备有限公司 | Internally-installed radar speed and distance measuring device |
| JP2017077804A (en) * | 2015-10-21 | 2017-04-27 | スズキ株式会社 | Front grille |
| CN106608236A (en) * | 2015-10-21 | 2017-05-03 | 铃木株式会社 | Front grille |
| US11059458B2 (en) | 2018-08-08 | 2021-07-13 | Toyota Motor Engineering & Manufacturing North America, Inc. | System and method for cleaning obstructions for the sensors of an autonomous vehicle |
| JP2020153905A (en) * | 2019-03-22 | 2020-09-24 | サカエ理研工業株式会社 | Vehicle radar device |
| JP2022039109A (en) * | 2020-08-27 | 2022-03-10 | 本田技研工業株式会社 | Movable body |
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