JPS6049277A - Car laser radar equipment - Google Patents
Car laser radar equipmentInfo
- Publication number
- JPS6049277A JPS6049277A JP58157632A JP15763283A JPS6049277A JP S6049277 A JPS6049277 A JP S6049277A JP 58157632 A JP58157632 A JP 58157632A JP 15763283 A JP15763283 A JP 15763283A JP S6049277 A JPS6049277 A JP S6049277A
- Authority
- JP
- Japan
- Prior art keywords
- laser
- distance
- car
- laser radar
- lens
- 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
Classifications
-
- 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
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/93—Lidar systems specially adapted for specific applications for anti-collision purposes
- G01S17/931—Lidar systems specially adapted for specific applications for anti-collision purposes of land vehicles
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Traffic Control Systems (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、先行車両との距離あるいは相対速度を検出
するべく、先行車両に曲りてシー1ザ光を!!4!射し
て反射光を受光する車載用レーリル−タ装;6に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention is designed to detect the distance or relative speed to a preceding vehicle by turning to the preceding vehicle and emitting a sea light! ! 4! The present invention relates to an on-vehicle rail system that emits light and receives reflected light.
先行車両との距離1あるいは相対速度を検出し、て、適
j′?な中間距離を保つように車速を制御したり、界雷
な車間の接近GこりIして警報を発する装置が一部の車
両に採用されている。Detect the distance 1 or relative speed to the preceding vehicle and determine whether it is appropriate. Some vehicles are equipped with devices that control vehicle speed to maintain a safe intermediate distance, or issue a warning when vehicles are approaching each other.
この場合の車間距離あるいは相χ1速度を検出する手段
として、レーザレーダ装置の使用が嵩えられている。こ
のレーザレーダ装置は、パルス状のレーザ光を先行車両
に向4Jて照射し、先11屯両で反射されたレーザ光を
受光素子で受り、照Ulから受光までの時間によって車
間距離を検出し、また、一定時間当りの車間距離変化分
から相対速度を検出するものである。In this case, a laser radar device is used as a means for detecting the inter-vehicle distance or the phase χ1 speed. This laser radar device emits pulsed laser light 4J toward the preceding vehicle, receives the laser light reflected by the preceding 11 vehicles with a light receiving element, and detects the inter-vehicle distance based on the time from illumination Ul to light reception. Furthermore, the relative speed is detected from the change in inter-vehicle distance over a certain period of time.
、二のレーザレーダ装置の概念図を第1図に示す。A conceptual diagram of the second laser radar device is shown in FIG.
レーザレーダ装置R内のレーザ発光部[ろで発光された
レーザ光は、レンズI、て平行光線[3とされ、先行車
両■に照射されろ。1〜かし レー″IJ′光は、比較
的ビーノ、径の小さい平行光線とされるため、照射され
た光が先行車両Vの1−ランクやり一トつ・(ントのよ
うな(頃斜面に当たると、反射光がレーザレーダ装置内
の受光素子に到達せず、車間+jljMllあるいは相
対速度の検出ができなくなることがある。The laser light emitted by the laser emitting unit [RO] in the laser radar device R is converted into parallel light [3] by the lens I, and is irradiated onto the preceding vehicle (3). Since the 1 to 100 rays'IJ' light is considered to be a parallel beam with a relatively small diameter, the irradiated light may cause damage to the 1st rank of the preceding vehicle V. If the reflected light does not reach the light receiving element in the laser radar device, it may become impossible to detect the vehicle distance +jljMll or the relative speed.
このような従来の問題に浩み、本発明の目的とするとこ
ろは、レーザ光線のビーム径を広げて先行車両の車体上
の比較的広い範囲にレーザ光が照射されるようにするこ
とによって、受光素子に曲りで光を反射する部分に、確
実にレージ′光が照射されるようにすることにある。In view of these conventional problems, it is an object of the present invention to widen the beam diameter of the laser beam so that the laser beam irradiates a relatively wide area on the vehicle body of the preceding vehicle. The objective is to ensure that the laser beam is irradiated onto the portion of the light receiving element that reflects light due to its bend.
この目的を達成するため、本発明は、先行車両に照射さ
れるレーザビームの広がり幅を、最大必要探知距離にお
いて、3rL路の一車線分の幅程度にするべく、レーザ
発光部をレンズの焦点距離に近づけて配置したことを特
徴とする。In order to achieve this object, the present invention focuses the laser emitting part on the lens so that the spread width of the laser beam irradiated to the preceding vehicle is about the width of one lane of the 3rL road at the maximum required detection distance. It is characterized by being placed close to each other.
かかる本発明によれば、レーザ発光部がレンズの焦点距
離よりレンズ例に近づけて配置された結果、レーザ光線
のビーム径は広げられ、しかも、この広がり幅は最大必
要探知距離において、道路の一車線分の幅程度とされる
ので、先行車両の全体あるいは殆ど全体にレーザ光を)
1a射することができ、受光素子に向けて光を反射さゼ
る部分に、確実にレーザ光を照射ずろことができる。例
えば、ilj:両の後方には、必ずリフレクタが装着さ
れているが、このリフレクタにレーザ光を照射して、反
射光を確実に受光素子で受けることができ、先11車両
を確実にとらえることができる。According to the present invention, as a result of the laser emitting section being arranged closer to the lens than the focal length of the lens, the beam diameter of the laser beam is widened, and furthermore, this broadening width is larger than that of the road at the maximum required detection distance. It is said to be about the width of a lane, so the laser beam will illuminate the entire or almost the entire vehicle in front).
The laser beam can be reliably irradiated onto the portion where the light is reflected toward the light-receiving element. For example, ilj: A reflector is always attached to the rear of both cars, and by irradiating this reflector with laser light, the reflected light can be reliably received by the light receiving element, and the 11 vehicles ahead can be reliably captured. I can do it.
以下、本発明の実施例を図面によっ゛ζ説明する。Embodiments of the present invention will be described below with reference to the drawings.
第2図は、一実施例の概念図であり、レーザレーダ装置
2において、レーザ発光部22は、レンズ21の焦点距
離よりもレンズ例に近づiJて配置されている。このた
め、レーザ発光部22で発ゼられたレーザ光は、先行車
両lに向iJてビーム径を除々に広げられたビーム3と
なり、レーザレーダ装置2の最大必要探知距離において
、道路の一車線分の幅、つまり、約3.7m程度とされ
る。FIG. 2 is a conceptual diagram of one embodiment. In the laser radar device 2, the laser emitting section 22 is arranged iJ closer to the lens example than the focal length of the lens 21. FIG. Therefore, the laser light emitted by the laser emitting unit 22 becomes a beam 3 whose beam diameter is gradually expanded toward the preceding vehicle l, and at the maximum required detection distance of the laser radar device 2, only one lane of the road It is said to be approximately 3.7 meters wide.
従って、レーザレーダ装置2から発・Uられたレーザビ
ーム3は、先行車両のほぼ全体に照射されることになり
、リフレクタ部分など照射された光をレーザレーダ装置
2の受光素子(図示セず)に四〇で反射する部分を含む
範囲に、レーザビーム3を照射することができる。Therefore, the laser beam 3 emitted from the laser radar device 2 will irradiate almost the entirety of the preceding vehicle, and the irradiated light will be transmitted to the light receiving element of the laser radar device 2 (not shown). The laser beam 3 can be irradiated to a range including the portion reflected by the laser beam 40.
第1図は、vt来のレーザレーダ装置の概念図、第2図
は、本発明の一実施例の概念図てあイ)。
1−−−一先行車両
2−−一−レーザレーダ装置
21−−レンズ
22−−−−レーザ発光部
3−−−レーザビーム
出願人 トヨタ自動車株人会社FIG. 1 is a conceptual diagram of a conventional laser radar device, and FIG. 2 is a conceptual diagram of an embodiment of the present invention. 1---1 Leading vehicle 2--1-Laser radar device 21--Lens 22--Laser emitting section 3--Laser beam Applicant Toyota Motor Corporation
Claims (1)
、先行車両にlii長Jてレー更光を照射して反射光を
受光する中桟用レーザレーダ装置であって、 先行車両に照射されるレーザビームの広がり幅を、最大
必要探知距離において、道路の一車線分の幅程度にする
べく、レーザ発光部をレンズの焦点距離に近づりて配置
したことを特徴とする車1.Is用レー+Jル−ダ装置
。[Scope of Claims] (1) A laser radar device for a middle crosspiece that irradiates a preceding vehicle with a laser beam at a distance of lii and receives reflected light in order to detect the distance or relative speed to the preceding vehicle, The laser emitting part is arranged close to the focal length of the lens so that the spread width of the laser beam irradiated to the preceding vehicle is about the width of one lane of the road at the maximum required detection distance. Car 1. Is radar + J router device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58157632A JPS6049277A (en) | 1983-08-29 | 1983-08-29 | Car laser radar equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58157632A JPS6049277A (en) | 1983-08-29 | 1983-08-29 | Car laser radar equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6049277A true JPS6049277A (en) | 1985-03-18 |
Family
ID=15653961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58157632A Pending JPS6049277A (en) | 1983-08-29 | 1983-08-29 | Car laser radar equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6049277A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62199686U (en) * | 1986-06-09 | 1987-12-19 | ||
US5169593A (en) * | 1989-11-03 | 1992-12-08 | General Electric Company | Control rod drive handling tools for nuclear reactor |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5179455A (en) * | 1974-12-28 | 1976-07-10 | Mitsubishi Electric Corp | |
JPS5518108B2 (en) * | 1974-10-18 | 1980-05-16 | ||
JPS5677774A (en) * | 1979-11-30 | 1981-06-26 | Nissan Motor Co Ltd | Obstacle detecting device for car |
-
1983
- 1983-08-29 JP JP58157632A patent/JPS6049277A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5518108B2 (en) * | 1974-10-18 | 1980-05-16 | ||
JPS5179455A (en) * | 1974-12-28 | 1976-07-10 | Mitsubishi Electric Corp | |
JPS5677774A (en) * | 1979-11-30 | 1981-06-26 | Nissan Motor Co Ltd | Obstacle detecting device for car |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62199686U (en) * | 1986-06-09 | 1987-12-19 | ||
US5169593A (en) * | 1989-11-03 | 1992-12-08 | General Electric Company | Control rod drive handling tools for nuclear reactor |
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