JPS62285089A - Sensing of vehicle - Google Patents
Sensing of vehicleInfo
- Publication number
- JPS62285089A JPS62285089A JP61128067A JP12806786A JPS62285089A JP S62285089 A JPS62285089 A JP S62285089A JP 61128067 A JP61128067 A JP 61128067A JP 12806786 A JP12806786 A JP 12806786A JP S62285089 A JPS62285089 A JP S62285089A
- Authority
- JP
- Japan
- Prior art keywords
- light
- vehicle
- road
- receiver
- emitter
- 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
- 238000000034 method Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
Description
【発明の詳細な説明】 3、発明の詳細な説明 〔産業上の利用分野〕 この発明は、道路上を通過する車両を感知し。[Detailed description of the invention] 3. Detailed description of the invention [Industrial application field] This invention senses vehicles passing on the road.
交通量、速度、占有率などを計測する感知器のうち、車
両が光線を遮断することにより、この車両を感知する車
両感知方法に関するものである。Among sensors that measure traffic volume, speed, occupancy rate, etc., this relates to a vehicle sensing method that detects a vehicle by blocking light beams from the vehicle.
従来、車両が通過する車線の両側に発光器と受光器を設
け、車両を感知する光電式の車両感知装置が提案されて
いる。その1つは発光器と受光器が直接向き合う方式で
アシ、−光線を水平に張っており、駐車場の出入口など
で用いられている。Conventionally, a photoelectric vehicle sensing device has been proposed that detects a vehicle by providing a light emitter and a light receiver on both sides of a lane in which a vehicle passes. One is a method in which the emitter and receiver face each other directly, emitting a horizontal beam of light, and is used at the entrances and exits of parking lots.
しかしながらこのような従来の装置は、乗用車で都合の
良い高さに光線を張ると、大型トランクでは光線が荷台
の下になるため、光線が通υ抜ける個所が発生し、1台
の車両に対して複数の信号が出てしまい、逆に光線を張
る高さを大型トラックに都合の良い位置にすると、乗用
車では窓を通シ抜け、また車高の低いスポーツカーなど
では感知できないという問題がある。However, with such conventional devices, if the light beam is placed at a convenient height for a passenger car, the light beam will be below the cargo bed in a large trunk, so there will be places where the light beam can pass through. On the other hand, if the height of the light beam is set at a position convenient for large trucks, there is a problem that the light beam can pass through the window of a passenger car and cannot be detected by a low-height sports car. .
このような問題は異なる高さに分けて光線を張り、車両
が通過している間は必ずどれかの光線が遮断されるよう
Kすることで解決できるが、このような装置は大きく複
雑になるとともに、設置調整も容易でない。また、路面
に近い発光器、受光器は走行車が飛散させる泥により光
線の透過が妨げられ易い。This kind of problem can be solved by splitting the light beams at different heights and making sure that one of the light beams is blocked whenever a vehicle passes by, but such a device would be large and complex. In addition, installation and adjustment are not easy. Furthermore, transmission of light from a light emitter and light receiver close to the road surface is likely to be obstructed by mud scattered by a traveling vehicle.
このような問題点を解決するためにこの発明は、発光器
から発した光を路面で反射させるようにしたものである
。In order to solve these problems, the present invention reflects the light emitted from the light emitter on the road surface.
車高に関係なく車両通過時に光線が遮断される。 The light beam is blocked when a vehicle passes regardless of the vehicle height.
第1図はこの発明の一実施例を示す図であり、1.2は
適当な高さに設けられた発光器、受光器であ95発光器
1から発した光4は道路3で反射し、受光器2に入射す
るようになっている。FIG. 1 is a diagram showing an embodiment of the present invention, and 1.2 is a light emitter and a light receiver installed at an appropriate height.95 Light 4 emitted from the light emitter 1 is reflected by the road 3. , are made incident on the photoreceiver 2.
このように構成すると、道路3を車両が走行するとき、
車両によって光4が遮断され、車両の存在が感知される
。ここでは従来の方法と異なり光4を水平でなく、斜に
張っているので、車両の高さに関係なく車両通過時に光
線が遮断される。With this configuration, when the vehicle runs on the road 3,
The light 4 is blocked by the vehicle and the presence of the vehicle is sensed. Here, unlike the conventional method, the light 4 is spread diagonally rather than horizontally, so the light beam is blocked when the vehicle passes, regardless of the height of the vehicle.
第2図は道路幅が広いときの例であシ、このときは発光
器1または受光器2の高さを高くして。Figure 2 shows an example when the road width is wide, and in this case, the height of the light emitter 1 or the light receiver 2 is increased.
道路3に対する光線4の入射角度を確保している。The incident angle of the light ray 4 with respect to the road 3 is ensured.
第3図は発光器、受光器の高さが制限されるときの例で
あシ、このときは発光器ia、ibがら光線4m、4b
を送出し、これを受光器2a、ibによって受光するこ
とによシ、検出精度の低下を防止することかできる。Figure 3 shows an example when the heights of the emitter and receiver are limited.
By sending out the light and receiving it by the light receivers 2a and ib, it is possible to prevent a decrease in detection accuracy.
以上の方法は道路上を人が歩かない時の例であるが、人
が歩くときはこのままであると人の歩行によって光線が
遮断され、誤動作をひきおこす可能性がある。このよう
なときは車両の進行方向に2本の光線を張っておき、こ
の2本の光線が同時に遮断されたときは車両であると判
断すれば良い。The above method is an example when no one is walking on the road, but if the method is left as is when a person is walking, the light rays will be blocked by the person's walking, which may cause malfunctions. In such a case, two light beams may be set in the direction in which the vehicle is traveling, and if these two light beams are blocked at the same time, it may be determined that the vehicle is present.
なお、以上の実施例において第1図〜第3図は光線の入
射角と反射角が等しい図として記載しであるが、道路で
の乱反射を利用することも可能であシ、この場合は発光
器、受光器の設置場所の制約は一層少なくなる。In the above embodiments, FIGS. 1 to 3 are shown as diagrams in which the angle of incidence and angle of reflection of the light rays are equal, but it is also possible to use diffuse reflection on the road, and in this case, the light emission There are fewer restrictions on where the receiver and light receiver can be installed.
以上説明したようKこの発明は、発光器から発した光を
路面で反射させ、この反射光を感知しているので、車両
の種別に関係なく車両を感知できるという効果を有する
。As explained above, this invention has the effect of being able to detect a vehicle regardless of the type of vehicle, since the light emitted from the light emitter is reflected on the road surface and this reflected light is sensed.
第1図はこの発明の一実施例を示す説明図、第2図およ
び第3図は他の実施例を示す説明図である。
1 、1a、ib・see発光器、 2 、2m、2b
−・・・受光器、3・・・・道路、 4 、4&、4
b・・・・光。FIG. 1 is an explanatory diagram showing one embodiment of the present invention, and FIGS. 2 and 3 are explanatory diagrams showing other embodiments. 1, 1a, ib・see light emitter, 2, 2m, 2b
-...Receiver, 3...Road, 4, 4 &, 4
b... light.
Claims (1)
れることで車両の存在を感知する車両の感知方法におい
て、発光器から発する光を路面に反射させその反射光を
受光器で受光することを特徴とする車両感知方法。In a vehicle sensing method that detects the presence of a vehicle by receiving light emitted from a light emitter with a light receiver and blocking that light, the light emitted from the light emitter is reflected on the road surface and the reflected light is received by a light receiver. A vehicle sensing method characterized by:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61128067A JPS62285089A (en) | 1986-06-04 | 1986-06-04 | Sensing of vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61128067A JPS62285089A (en) | 1986-06-04 | 1986-06-04 | Sensing of vehicle |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS62285089A true JPS62285089A (en) | 1987-12-10 |
Family
ID=14975638
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61128067A Pending JPS62285089A (en) | 1986-06-04 | 1986-06-04 | Sensing of vehicle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62285089A (en) |
-
1986
- 1986-06-04 JP JP61128067A patent/JPS62285089A/en active Pending
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