JPH011992A - Inter-vehicle distance measurement radar - Google Patents
Inter-vehicle distance measurement radarInfo
- Publication number
- JPH011992A JPH011992A JP62-156979A JP15697987A JPH011992A JP H011992 A JPH011992 A JP H011992A JP 15697987 A JP15697987 A JP 15697987A JP H011992 A JPH011992 A JP H011992A
- Authority
- JP
- Japan
- Prior art keywords
- inter
- vehicle
- vehicle distance
- antenna
- radar
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、軌道車両等に搭載きれて他の車両との距離の
測定に用いられる車間距離測定レーダに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an inter-vehicle distance measuring radar that can be mounted on a track vehicle or the like and used to measure distances to other vehicles.
（従来の技術）
従来から、ドツプラー効果およびＦＭ−ＣＷの原理を用
いた車間距離測定用レーダは多く考えられている。従来
のこの種の車間距離測定用レーダでは、使用アンテナの
指向性は測定対象領域の広がりとは無関係に一定に設定
されている。(Prior Art) Conventionally, many radars for measuring inter-vehicle distance using the Doppler effect and FM-CW principles have been considered. In this type of conventional radar for measuring inter-vehicle distance, the directivity of the antenna used is set to be constant regardless of the extent of the measurement target area.
（発明が解決しようとする問題点）
上述した従来の車−距ａｔ測定レーダでは、アンテナの
指向性が測定対象領域の広がり角度に無関係に一定に設
定されているから、カーブを有する軌道上を運行する車
両システムに従来の車間距離測定レーダを適用すると、
軌道の曲率半径が小言なカーブに先方車両が差しかかる
と先方車両が後方車両の考量距離測定レーダのアンテナ
の指向性の範囲から逸脱するという欠点がある。(Problems to be Solved by the Invention) In the conventional vehicle-to-distance measurement radar described above, the directivity of the antenna is set to be constant regardless of the spread angle of the measurement target area. When a conventional inter-vehicle distance measurement radar is applied to a vehicle system in operation,
There is a drawback that when the preceding vehicle approaches a curve with a radius of curvature of the trajectory, the preceding vehicle deviates from the directivity range of the antenna of the distance measurement radar of the following vehicle.
（問題点を解決するための手段）
前述の問題点を解決するために本発明が提供する手段は
、アンテナから波動をビームに成形して送波し、車両で
反射された波動を前記アンテナで受波し、送波した波動
と受波した波動との関係から前記車両までの距離を測定
する車間距離測定レーダであって、前記距離の測定の対
象となる領域の広がり角度に応じて前記ビームの広がり
角度を調節する手段が備えてあることを特徴とする。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides means for forming waves into a beam from an antenna and transmitting the waves, and for transmitting waves reflected by a vehicle using the antenna. An inter-vehicle distance measuring radar that measures the distance to the vehicle based on the relationship between the received wave, the transmitted wave, and the received wave. The invention is characterized in that it is provided with means for adjusting the spread angle.
（実施例） 次に本発明について図面を参照して説明する。(Example) Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例の概念を示す図である。図に
おいて、ｌａ、 ｌｂ、 ｌｃは車間距離測定レーダを
搭載した車両、２ａ、２ｂ、２ｃは指向性が調節できる
アンテナ、３ａ 、 ３ｂはレール等の軌道、θ、は測
定対象領域の広がり角度が狭い場合におけるアンテナ指
向角度、θ２は測定対象領域が広い場合におけるアンテ
ナ指向角度である。FIG. 1 is a diagram showing the concept of an embodiment of the present invention. In the figure, la, lb, and lc are vehicles equipped with inter-vehicle distance measurement radar, 2a, 2b, and 2c are antennas with adjustable directivity, 3a and 3b are tracks such as rails, and θ is the spread angle of the measurement target area. The antenna directivity angle θ2 is the antenna directivity angle when the measurement target area is wide.
直線軌道３ａ上にある車両１ａ、ｌｃの車間距離測定レ
ーダではアンテナの指向性が狭くても先方車両がθ１の
範囲から逸脱することはない。しかし曲率半径が小きい
軌道３ｂ上にある車両１ｂの車間距離測定レーダでは指
向角度θ、では先方車両１ａをアンテナのビームからは
み出してしまう。しかしこの様な曲率半径の小さい軌道
３ｂ上でも本実施例ではアンテナのビーム幅を広くして
θ、にするので図示の如くアンテナビームの範囲から先
方車両１ａを逸脱することはない。In the inter-vehicle distance measuring radar for the vehicles 1a and lc on the straight track 3a, even if the directivity of the antenna is narrow, the preceding vehicle will not deviate from the range of θ1. However, when the inter-vehicle distance measuring radar of the vehicle 1b on the track 3b with a small radius of curvature has a directivity angle of θ, the preceding vehicle 1a is projected out of the antenna beam. However, even on such a trajectory 3b with a small radius of curvature, in this embodiment the beam width of the antenna is widened to θ, so that the preceding vehicle 1a does not deviate from the range of the antenna beam as shown in the figure.
（発明の効果）
以上に説明したように本発明の車間距離測定レーダでは
、アンテナのビームの広がり角度を距離測定対象領域の
広がり角度に応じて調節するから、曲率半径のノ」ｈさ
い軌道上でも先方車両をアンテナのビーム範囲に維持し
て、先方車両の距離の測定を継続的に行える。(Effects of the Invention) As explained above, in the inter-vehicle distance measuring radar of the present invention, since the spread angle of the antenna beam is adjusted according to the spread angle of the distance measurement target area, However, the distance to the vehicle ahead can be continuously measured by keeping the vehicle in the beam range of the antenna.
第１図は本発明の一実施例の概念を示す図である＠図に
おいて、ｌａ、ｌｂ、ｌｃは車間距離測定レーダを搭載
した車両、２ａ 、 ２ｂ 、 ２ｃは指向性の調節が
できるアンテナ、３ａ 、 ３ｂはレール等の軌道。FIG. 1 is a diagram showing the concept of an embodiment of the present invention. In the figure, la, lb, and lc are vehicles equipped with inter-vehicle distance measuring radar, 2a, 2b, and 2c are antennas whose directivity can be adjusted; 3a and 3b are tracks such as rails.
Claims (1)
射された波動を前記アンテナで受波し、送波した波動と
受波した波動との関係から前記車両までの距離を測定す
る車間距離測定レーダにおいて、前記距離の測定の対象
となる領域の広がり角度に応じて前記ビームの広がり角
度を調節する手段が備えてあることを特徴とする車間距
離測定レーダ。An inter-vehicle distance in which a wave is formed into a beam and transmitted from an antenna, the wave reflected by a vehicle is received by the antenna, and the distance to the vehicle is measured from the relationship between the transmitted wave and the received wave. An inter-vehicle distance measuring radar, characterized in that the radar includes means for adjusting the spread angle of the beam in accordance with the spread angle of the area to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62156979A JPS641992A (en) | 1987-06-23 | 1987-06-23 | Radar for measuring distance between vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62156979A JPS641992A (en) | 1987-06-23 | 1987-06-23 | Radar for measuring distance between vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH011992A true JPH011992A (en) | 1989-01-06 |
| JPS641992A JPS641992A (en) | 1989-01-06 |
Family
ID=15639513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62156979A Pending JPS641992A (en) | 1987-06-23 | 1987-06-23 | Radar for measuring distance between vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS641992A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06291994A (en) * | 1992-08-10 | 1994-10-18 | Ricoh Co Ltd | Method and unit for processing picture |
-
1987
- 1987-06-23 JP JP62156979A patent/JPS641992A/en active Pending
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