JPH0850697A - Vehicle detector - Google Patents
Vehicle detectorInfo
- Publication number
- JPH0850697A JPH0850697A JP6185584A JP18558494A JPH0850697A JP H0850697 A JPH0850697 A JP H0850697A JP 6185584 A JP6185584 A JP 6185584A JP 18558494 A JP18558494 A JP 18558494A JP H0850697 A JPH0850697 A JP H0850697A
- Authority
- JP
- Japan
- Prior art keywords
- vehicle
- sun
- receiving element
- image
- polarizing filter
- 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.)
- Granted
Links
Landscapes
- Light Receiving Elements (AREA)
- Traffic Control Systems (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、有料道路料金所や駐車
場における車両検知装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle detection device in a toll road tollgate or a parking lot.
【０００２】[0002]
【従来の技術】有料道路の料金所や駐車場において、通
行券または駐車券の発行業務を自動化する場合、進入ま
たは通過する車両を自動的に検知し、それぞれの車両に
対して通行券、または駐車券を発行しなければならな
い。2. Description of the Related Art When automating the operation of issuing a toll ticket or a parking ticket at a toll gate or a parking lot on a toll road, vehicles that enter or pass are automatically detected, and the ticket You have to issue a parking ticket.
【０００３】このための車両検知装置として、従来では
特願平０５−０３０２４７号にて出願した図７に示すよ
うな方法を用いている。即ち、道路１２に白、または黒
にて一定周期のマーカ−ライン６を描き、このマーカー
ライン６上を通過する車両１３を、ガントリー１１に取
付けた受光素子アレイ１と、その前面に取付けた集光レ
ンズ２により撮像する。ここで、集光レンズ２は、入射
する光量に応じて、その絞り量を変化させ、受光素子ア
レイ１に入射する光量をできるだけ一定に保つように制
御される。そして、上記受光素子アレイ１で撮像した画
像は、処理装置１０へ送られて処理され、その処理結果
が通行券発行機１４へ送られる。As a vehicle detection device for this purpose, the method shown in FIG. 7 applied in Japanese Patent Application No. 05-030247 is conventionally used. That is, a marker line 6 having a constant cycle is drawn on the road 12 in white or black, and the vehicle 13 passing on the marker line 6 is mounted on the gantry 11 and the light receiving element array 1 and the front surface thereof are assembled. An image is taken by the optical lens 2. Here, the condenser lens 2 is controlled so as to change the diaphragm amount according to the amount of incident light and keep the amount of light incident on the light receiving element array 1 as constant as possible. The image picked up by the light receiving element array 1 is sent to the processing device 10 for processing, and the processing result is sent to the pass ticket issuing machine 14.
【０００４】上記受光素子アレイ１では、図８に示すよ
うな画像１５が撮像される。即ち、この画像１５中に
は、上記マーカーライン６の画像６ａ、マーカーライン
６が車両１３の窓に反射している画像６ｂ、及びマーカ
ーライン６上を通過する車両１３の画像１３ａ等が含ま
れる。上記画像１５において、マーカーライン画像６ａ
の存在する走査線の明るさの分布を見ると、図２のよう
になる。図２において、（ａ）は車両１３が存在しない
ときであり、（ｂ）及び（ｃ）は車両１３が存在すると
きである。An image 15 as shown in FIG. 8 is picked up by the light receiving element array 1. That is, the image 15 includes the image 6a of the marker line 6, the image 6b in which the marker line 6 is reflected on the window of the vehicle 13, the image 13a of the vehicle 13 passing on the marker line 6, and the like. . In the image 15 above, the marker line image 6a
When the distribution of the brightness of the scanning lines in which is present is seen, it is as shown in FIG. In FIG. 2, (a) is when the vehicle 13 is not present, and (b) and (c) is when the vehicle 13 is present.
【０００５】車両１３が存在しないときは、（ａ）に示
すようにマーカーライン画像６ａのみであり、明るさは
マーカーライン６の周期に応じた周期波形を示す。しか
し、マーカーライン６部分に車両１３が進入すると、
（ｂ）または（ｃ）に示すように、マーカーライン画像
６ａの一部が車体によって隠され、周期波形がなくな
る。When the vehicle 13 does not exist, only the marker line image 6a is shown as shown in (a), and the brightness shows a periodic waveform corresponding to the period of the marker line 6. However, when the vehicle 13 enters the marker line 6 part,
As shown in (b) or (c), a part of the marker line image 6a is hidden by the vehicle body, and the periodic waveform disappears.
【０００６】処理装置１０では、車両１３が進入してい
ない状態において、受光素子アレイ１によりマーカーラ
イン６部分を撮像し、マーカーライン画像６ａのみが存
在する走査線の分布を予め登録しておき、受光素子アレ
イ１から逐次入力される画像１５との相関値を求める。
相関値としては、例えば登録されている明るさの分布
と、入力された画像の明るさの分布の差を求め、その差
がある閾値より大きいか否かを検出する。In the processing device 10, the marker line 6 portion is imaged by the light receiving element array 1 in a state where the vehicle 13 has not entered, and the distribution of scanning lines in which only the marker line image 6a exists is registered in advance. The correlation value with the image 15 sequentially input from the light receiving element array 1 is obtained.
As the correlation value, for example, the difference between the registered brightness distribution and the brightness distribution of the input image is obtained, and it is detected whether or not the difference is larger than a certain threshold value.
【０００７】そして、処理装置１０の処理結果により、
マーカーライン画像６ａのない部分があるとき、即ち、
車両１３が進入したと判断されたときに、通行券発行機
１４に信号を送る。これにより通行券発行機１４は、通
行券を発行する。Then, according to the processing result of the processing device 10,
When there is a portion without the marker line image 6a, that is,
When it is determined that the vehicle 13 has entered, a signal is sent to the pass ticket issuing machine 14. As a result, the ticket issuing machine 14 issues a ticket.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、上記従
来の車両検知装置では、図８に示すように車両１３の側
面や窓にマーカーライン６が反射した反射画像６ｂが現
れることがある。この反射画像６ｂのために、図２に
（ｃ）に示すように本来は車両部分であるにも拘らずマ
ーカーライン画像６ａのように観測され、１台の車両１
３を、幅のやや狭い車両と、単車のように幅の狭い車両
の２台が進入したと誤検出することがあり、高い信頼性
が得られないという問題があった。However, in the above-described conventional vehicle detection device, a reflected image 6b in which the marker line 6 is reflected may appear on the side surface or the window of the vehicle 13 as shown in FIG. Due to this reflection image 6b, it is observed as a marker line image 6a although it is originally a vehicle portion as shown in FIG.
3 may be erroneously detected as entering a vehicle with a slightly narrow width and a vehicle with a narrow width such as a single vehicle, and there is a problem that high reliability cannot be obtained.
【０００９】また、昼間では太陽光の照度が高く、朝夕
の薄暮時には太陽光の照度が低くなるため、照度に応じ
て集光レンズ２の絞り量を制御するが、集光レンズ２の
絞り制御だけでは白昼の非常に高い照度から、薄暮時の
低い照度まで対応することは困難であり、適用範囲が制
約されていた。Further, since the illuminance of sunlight is high in the daytime and becomes low at dusk in the morning and evening, the aperture amount of the condenser lens 2 is controlled according to the illuminance. It was difficult to deal with extremely high illuminance during daylight hours and low illuminance during dusk, and the range of application was limited.
【００１０】本発明は上記実情に鑑みてなされたもの
で、車両の側面や窓からの反射画像をなくすことがで
き、高い信頼性が得られると共に、広範囲な照度変化に
対応し得る車両検知装置を提供することを目的とする。The present invention has been made in view of the above circumstances, and a vehicle detection device capable of eliminating a reflection image from a side surface or a window of a vehicle, having high reliability, and capable of coping with a wide range of illuminance change. The purpose is to provide.
【００１１】[0011]
【課題を解決するための手段】本発明に係る車両検知装
置は、車両の通行する道路に描かれたマーカーライン
と、上記道路の上方位置に設置され、上記マーカーライ
ン部分を撮像する受光素子アレイと、この受光素子アレ
イの前面に取付けられる集光レンズと、この集光レンズ
の前面に回転可能に取付けられる第１の偏光フィルタ
と、この第１の偏光フィルタの前面に朝または夕方の偏
光された反射光を打ち消す向きに偏光面が固定して取付
けられる第２の偏光フィルタと、上記受光素子アレイか
ら見た太陽の方向を検知する太陽検知手段と、この太陽
検知手段により朝または夕方であると判断された時は上
記第２の偏光フィルタと同じ偏光面となるように、昼間
であると判断された時は昼間の偏光された反射光を打ち
消すように上記第１の偏光フィルタを回転制御する手段
と、上記受光素子アレイによって撮像された画像から道
路のマーカーラインを検出することにより車両の通過を
検出する手段とを具備したことを特徴とする。A vehicle detection device according to the present invention is provided with a marker line drawn on a road on which a vehicle passes, and a light-receiving element array installed above the road for picking up an image of the marker line portion. A condenser lens attached to the front surface of the light receiving element array, a first polarizing filter rotatably attached to the front surface of the condenser lens, and morning or evening polarized light on the front surface of the first polarizing filter. A second polarizing filter having a polarization plane fixedly mounted so as to cancel the reflected light, sun detecting means for detecting the direction of the sun as seen from the light receiving element array, and the sun detecting means for morning or evening. When it is determined that the same polarization plane as that of the second polarizing filter is obtained, when it is determined that it is daytime, the daylight polarized reflected light is canceled. Means for rotation control light filter, characterized by comprising a means for detecting the passage of a vehicle by detecting a marker line of a road from the image captured by the light receiving element array.
【００１２】[0012]
【作用】太陽検知手段により朝または夕方であると判断
された場合には、第１の偏光フィルタが第２の偏光フィ
ルタと同じ偏光面となるように回転制御される。また、
太陽検知手段により昼間であると判断された場合には、
昼間の偏光された反射光を打ち消すように制御される。When the sun detecting means determines that it is morning or evening, the rotation of the first polarizing filter is controlled so that it has the same plane of polarization as the second polarizing filter. Also,
If the sun detection means determines that it is daytime,
Controlled to cancel out daylight polarized reflected light.
【００１３】この結果、朝または夕方の薄暮時には、第
２の偏光フィルタにより反射画像が打ち消され、また、
昼間では第１の偏光フィルタにより反射画像が打ち消さ
れると共に、第２の偏光フィルタとの偏光面の交差角に
応じて入射される光量が減少し、集光レンズによる絞り
調整の範囲を拡大できる。これにより車両の誤検知が解
消され、かつ、広範な照度変化に対応することができ
る。As a result, at dusk in the morning or evening, the reflection image is canceled by the second polarizing filter, and
In the daytime, the reflection image is canceled by the first polarization filter, the amount of incident light is reduced according to the angle of intersection of the polarization plane with the second polarization filter, and the range of diaphragm adjustment by the condenser lens can be expanded. As a result, erroneous detection of the vehicle can be eliminated and a wide range of illuminance changes can be dealt with.
【００１４】[0014]
【実施例】以下、図面を参照して本発明の一実施例を説
明する。図１は、本発明の一実施例に係る車両検知装置
の構成図である。道路１２には、所定の寸法に設定され
た一定周期のマーカーライン６が描かれる。また、道路
１２の側方にはガントリー１１が設置される。このガン
トリー１１は、上部先端が道路１２の上方で、かつ、マ
ーカーライン６の中央に位置するように設けられもの
で、その先端部に受光素子アレイ１が下向きに取付けら
れる。この受光素子アレイ１には、その前面に集光レン
ズ２が取付けられる。また、この集光レンズ２の前面に
は、第１の偏光フィルタ４が回転機構３により回転可能
に設けられると共に、更にその前面には第２の偏光フィ
ルタ５が設けられる。この第２の偏光フィルタ５は、受
光素子アレイ１に対して固定的に取付けられる。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a vehicle detection device according to an embodiment of the present invention. On the road 12, the marker line 6 having a predetermined cycle set to a predetermined size is drawn. A gantry 11 is installed on the side of the road 12. The gantry 11 is provided so that its upper end is located above the road 12 and in the center of the marker line 6, and the light receiving element array 1 is attached downward at the end thereof. A condenser lens 2 is attached to the front surface of the light receiving element array 1. A first polarization filter 4 is rotatably provided on the front surface of the condenser lens 2 by a rotating mechanism 3, and a second polarization filter 5 is further provided on the front surface. The second polarization filter 5 is fixedly attached to the light receiving element array 1.
【００１５】また、上記ガントリー１１には、その上端
部に太陽検知センサ７が上向きに取付けられ、その出力
信号が太陽検知装置８に入力される。この太陽検知装置
８の検知出力は、回転機構駆動装置９に入力される。こ
の回転機構駆動装置９は、上記第１の偏光フィルタ４の
回転機構３を駆動するもので、太陽検知装置８の出力に
応じて第１の偏光フィルタ４の偏光面の方向を替えるよ
うになっている。A sun detection sensor 7 is attached to the upper end of the gantry 11 so as to face upward, and an output signal from the sun detection sensor 7 is input to a sun detection device 8. The detection output of the sun detection device 8 is input to the rotation mechanism drive device 9. The rotation mechanism driving device 9 drives the rotation mechanism 3 of the first polarization filter 4, and changes the direction of the polarization plane of the first polarization filter 4 according to the output of the sun detection device 8. ing.
【００１６】一方、上記受光素子アレイ１により撮像さ
れた画像は、処理装置１０に入力され、車両１３の有無
が検出される。処理装置１０は、車両１３を検知する
と、その検知信号を通行券発行機１４に入力し、通行券
を発行させる。On the other hand, the image picked up by the light receiving element array 1 is input to the processing device 10 and the presence or absence of the vehicle 13 is detected. When the processing device 10 detects the vehicle 13, the processing device 10 inputs the detection signal to the pass ticket issuing machine 14 to issue a pass ticket.
【００１７】次に上記実施例の動作を説明する。先ず、
マーカーライン６部分に車両１３が進入していない状態
において、受光素子アレイ１によりマーカーライン６部
分を撮像し、マーカーライン画像６ａのみが存在する走
査線の分布を処理装置１０に予め登録しておく。また、
処理装置１０には、マーカーライン６の寸法についても
登録しておく。Next, the operation of the above embodiment will be described. First,
In a state where the vehicle 13 has not entered the marker line 6 portion, the marker line 6 portion is imaged by the light receiving element array 1, and the distribution of scanning lines in which only the marker line image 6a exists is registered in the processing device 10 in advance. . Also,
The size of the marker line 6 is also registered in the processing device 10.
【００１８】処理装置１０は、図２に（ａ）に示すよう
な車両１３のないときのマーカーライン画像６ａの明る
さの分布と、順次入力される画像１５のマーカーライン
画像６ａの信号の差を取り、相関を計算することにより
車両１３の検知処理を行なうが、この検知処理に先だっ
て車両１３の側面または窓にて反射されるマーカーライ
ン６に対する処理を行なう。The processing device 10 has a difference between the brightness distribution of the marker line image 6a when there is no vehicle 13 as shown in FIG. 2A and the signal of the marker line image 6a of the image 15 which is sequentially input. The detection process of the vehicle 13 is carried out by calculating the correlation and the correlation line is calculated. Prior to this detection process, the marker line 6 reflected by the side surface or the window of the vehicle 13 is processed.
【００１９】車両１３の側面、または窓にて反射され、
受光素子アレイ１に入射する反射画像は、図４に示すよ
うに受光素子アレイ１が下向きに撮像し、かつ、車両１
３の側面や窓がほぼ垂直であるため、全反射に近く、偏
光されることになる。Reflected by the side surface of the vehicle 13 or the window,
The reflection image incident on the light receiving element array 1 is captured by the light receiving element array 1 downward as shown in FIG.
Since the side surface and the window of 3 are almost vertical, they are close to total reflection and are polarized.
【００２０】この時の偏光面は、光源である太陽光の位
置により変化することがあり、昼の太陽位置１６では、
昼の偏光面１８を、朝または夕方の太陽位置１７では、
朝または夕方の偏光面１９を持つことが考えられる。The plane of polarization at this time may change depending on the position of the sunlight, which is the light source.
Polarization plane 18 in the daytime, at sun position 17 in the morning or evening,
It is conceivable to have a plane of polarization 19 in the morning or in the evening.
【００２１】そこで、図５に示すように、固定して設置
される第２の偏光フィルタ５は、その偏光面が朝または
夕方の偏光面１９と直交するように設置する。そして、
回転可能な第１の偏光フィルタ４は、その偏光面が昼に
は図５（ａ）に示すように昼の偏光面１８と直交するよ
うに、朝または夕方には図５（ｂ）に示すように朝また
は夕方の偏光面１９と直交するように制御する。Therefore, as shown in FIG. 5, the second polarization filter 5, which is fixedly installed, is installed so that its polarization plane is orthogonal to the polarization plane 19 in the morning or the evening. And
The rotatable first polarization filter 4 is shown such that its polarization plane is orthogonal to the daytime polarization plane 18 as shown in FIG. 5 (a) during the day and in the morning or evening as shown in FIG. 5 (b). As described above, control is performed so as to be orthogonal to the polarization plane 19 in the morning or the evening.
【００２２】朝または夕方の何れに合わせるかは、本装
置の設置場所や、車両の通過状況など環境に合わせて適
宜選択する。太陽検知センサ７は、図６に示すように、
受光素子アレイ２１の前面に魚眼レンズ２０を設置した
構成であり、太陽光の入射方向に対応した受光素子が最
も高い出力を出すようになっている。Whether to match the morning or the evening is appropriately selected according to the environment such as the installation location of the device and the passing condition of the vehicle. The sun detection sensor 7, as shown in FIG.
The fisheye lens 20 is installed on the front surface of the light receiving element array 21, and the light receiving element corresponding to the incident direction of sunlight outputs the highest output.
【００２３】上記太陽検知センサ７の出力は太陽検知装
置８に入力され、最も高い出力を出している受光素子ア
レイ２１上の受光素子の位置が検出される。この時、太
陽検知装置８内部に予め時計を設置して時間を検出し、
太陽の方向判定の１情報とすることも可能である。The output of the sun detection sensor 7 is input to the sun detection device 8 and the position of the light receiving element on the light receiving element array 21 that outputs the highest output is detected. At this time, a clock is previously installed inside the sun detector 8 to detect the time,
It is also possible to use this as one piece of information for determining the direction of the sun.
【００２４】回転機構駆動装置９は、太陽検知装置８の
出力を基に、第１の偏光フィルタ４が上述したような偏
光面を持つように回転機構３に指令を出して駆動させ
る。以上のような光学系の制御により、受光素子アレイ
１で撮像される画像１５は図３のようになる。即ち、図
８で現れていたような車両１３の側面、または窓からの
反射画像６ｂが第１の偏光フィルタ４及び第２の偏光フ
ィルタ５により消され、車両画像１３ａ及びマーカーラ
イン画像６ａのみとなる。Based on the output of the sun detecting device 8, the rotating mechanism driving device 9 issues a command to the rotating mechanism 3 to drive the first polarizing filter 4 so that the first polarizing filter 4 has the above-mentioned polarization plane. By controlling the optical system as described above, the image 15 picked up by the light receiving element array 1 is as shown in FIG. That is, the reflection image 6b from the side surface of the vehicle 13 or the window as shown in FIG. 8 is erased by the first polarization filter 4 and the second polarization filter 5, and only the vehicle image 13a and the marker line image 6a are obtained. Become.
【００２５】そして、処理装置１０では、図２（ａ）に
示すような車両１３のないときのマーカーライン画像６
ａの明るさの分布と、順次入力される画像１５のマーカ
ーライン画像６ａ部分の信号の差をとり、相関を計算す
る。Then, in the processing device 10, the marker line image 6 when there is no vehicle 13 as shown in FIG.
The correlation is calculated by taking the difference between the brightness distribution of a and the signal of the marker line image 6a portion of the image 15 that is sequentially input.
【００２６】この時、一般に昼間は太陽による照度が高
く、集光レンズ２の絞りを絞るように調整する必要があ
るが、第１の偏光フィルタ４と第２の偏光フィルタ５の
偏光面は、ある角度で交差するため、その交差角度に応
じて受光素子アレイ１に入射する光量は減少する。従っ
て、集光レンズ２による絞り調整に余裕ができることに
なる。At this time, in general, the illuminance by the sun is high in the daytime, and it is necessary to adjust the diaphragm of the condenser lens 2 so that the polarization planes of the first polarizing filter 4 and the second polarizing filter 5 are: Since they intersect at a certain angle, the amount of light incident on the light receiving element array 1 decreases according to the intersection angle. Therefore, there is a margin in adjusting the diaphragm by the condenser lens 2.
【００２７】また、朝夕の太陽光による照度が小さく、
集光レンズ２の絞りを開放するように調整する必要があ
る場合には、第１の偏光フィルタ４と第２の偏光フィル
タ５の偏光面が一致しているため、受光素子アレイ１に
入射する光量は最大となり、集光レンズ２による絞り調
整に余裕ができる。Further, the illuminance due to the sunlight in the morning and evening is small,
When it is necessary to adjust the aperture of the condenser lens 2 so as to open it, the first polarization filter 4 and the second polarization filter 5 have the same polarization plane, and thus enter the light receiving element array 1. The amount of light becomes maximum, and there is a margin in adjusting the diaphragm by the condenser lens 2.
【００２８】この結果、受光素子アレイ１により撮像さ
れる画像１５の明るさは、太陽光の照度変化の広い範囲
に亘って安定して得られる。そして、受光素子アレイ１
の撮像した画像１５に図２（ｂ）のような車両部分が存
在すると、差の出力が大きくなり、相関値が低くなる。
相関値が低くなると、処理装置１０はその部分に車両が
得ると判断して通行券発行機１４に信号を発し、通行券
発行機１４は通行券を発行する。As a result, the brightness of the image 15 picked up by the light receiving element array 1 can be stably obtained over a wide range of illuminance change of sunlight. Then, the light receiving element array 1
If a vehicle portion as shown in FIG. 2B is present in the captured image 15 of, the output of the difference becomes large and the correlation value becomes low.
When the correlation value becomes low, the processing device 10 determines that a vehicle will be in that portion, and issues a signal to the pass ticket issuing machine 14, and the pass ticket issuing machine 14 issues a pass ticket.
【００２９】[0029]
【発明の効果】以上詳記したように本発明によれば、車
両の側面や窓からの反射画像がなくなることにより、車
両の誤検出がなくなり、信頼性を向上することができ
る。また、２枚の偏光フィルタの偏光面の交差角を制御
することにより、受光素子アレイに入射する光量を制御
することが可能となり、広範囲な照度変化に対応できる
ようになる。As described above in detail, according to the present invention, erroneous detection of the vehicle is eliminated by eliminating the reflection image from the side surface of the vehicle or the window, and the reliability can be improved. Further, by controlling the crossing angle of the polarization planes of the two polarizing filters, it is possible to control the amount of light incident on the light receiving element array, and it is possible to cope with a wide range of illuminance changes.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の一実施例に係る車両検知装置の構成
図。FIG. 1 is a configuration diagram of a vehicle detection device according to an embodiment of the present invention.
【図２】車両検出のための信号処理を説明するための
図。FIG. 2 is a diagram for explaining signal processing for vehicle detection.
【図３】本発明により撮像される画像の説明図。FIG. 3 is an explanatory diagram of an image captured by the present invention.
【図４】本発明における反射画像の撮像を説明するため
の図。FIG. 4 is a diagram for explaining the capturing of a reflection image in the present invention.
【図５】本発明における２枚の偏光フィルタの制御方法
を説明するための図。FIG. 5 is a diagram for explaining a method of controlling two polarizing filters according to the present invention.
【図６】本発明における太陽検知センサの内部構成図。FIG. 6 is an internal configuration diagram of a sun detection sensor according to the present invention.
【図７】従来の車両検知装置の構成図。FIG. 7 is a configuration diagram of a conventional vehicle detection device.
【図８】従来の車両検知装置において撮像される画像の
説明図。FIG. 8 is an explanatory diagram of an image captured by a conventional vehicle detection device.
１，２１ 受光素子アレイ ２ 集光レンズ ３ 回転機構 ４ 第１の偏光フィルタ ５ 第２の偏光フィルタ ６ マーカーライン ６ａ マーカーライン画像 ６ｂ 反射画像 ７ 太陽検知センサ ８ 太陽検知装置 ９ 回転機構駆動装置 １０ 処理装置 １１ ガントリー １２ 道路 １３ 車両 １３ａ 車両画像 １４ 通行券発行機 １５ 画像 １６，１７ 太陽位置 １８，１９ 偏光面 ２０ 魚眼レンズ 1, 21 Light receiving element array 2 Condenser lens 3 Rotation mechanism 4 First polarization filter 5 Second polarization filter 6 Marker line 6a Marker line image 6b Reflection image 7 Sun detection sensor 8 Sun detection device 9 Rotation mechanism drive device 10 Processing Device 11 Gantry 12 Road 13 Vehicle 13a Vehicle image 14 Passage issuing machine 15 Image 16,17 Sun position 18,19 Polarization plane 20 Fisheye lens
フロントページの続き (72)発明者 藤田 一郎 兵庫県神戸市兵庫区和田崎町一丁目１番１ 号 三菱重工業株式会社神戸造船所内Front Page Continuation (72) Inventor Ichiro Fujita 1-1-1, Wadasaki-cho, Hyogo-ku, Kobe-shi, Hyogo Mitsubishi Heavy Industries Ltd. Kobe Shipyard
Claims (1)
ラインと、上記道路の上方位置に設置され、上記マーカ
ーライン部分を撮像する受光素子アレイと、この受光素
子アレイの前面に取付けられる集光レンズと、この集光
レンズの前面に回転可能に取付けられる第１の偏光フィ
ルタと、この第１の偏光フィルタの前面に朝または夕方
の偏光された反射光を打ち消す向きに偏光面が固定して
取付けられる第２の偏光フィルタと、上記受光素子アレ
イから見た太陽の方向を検知する太陽検知手段と、この
太陽検知手段により朝または夕方であると判断された時
は上記第２の偏光フィルタと同じ偏光面となるように、
昼間であると判断された時は昼間の偏光された反射光を
打ち消すように上記第１の偏光フィルタを回転制御する
手段と、上記受光素子アレイによって撮像された画像か
ら道路のマーカーラインを検出することにより車両の通
過を検出する手段とを具備したことを特徴とする車両検
知装置。1. A marker line drawn on a road on which a vehicle passes, a light-receiving element array installed above the road and capturing an image of the marker line portion, and a light-collecting device attached to the front surface of the light-receiving element array. A lens, a first polarization filter rotatably attached to the front surface of the condenser lens, and a polarization plane fixed to the front surface of the first polarization filter in a direction to cancel the morning or evening polarized reflected light. A second polarizing filter to be attached; a sun detecting means for detecting the direction of the sun as seen from the light receiving element array; and a second polarizing filter when the sun detecting means determines that it is morning or evening. So that they have the same plane of polarization
When it is judged that it is daytime, a means for controlling the rotation of the first polarizing filter so as to cancel the daylight-polarized reflected light, and a road marker line is detected from the image picked up by the light receiving element array. Accordingly, the vehicle detection device is provided with means for detecting passage of the vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18558494A JP3192882B2 (en) | 1994-08-08 | 1994-08-08 | Vehicle detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18558494A JP3192882B2 (en) | 1994-08-08 | 1994-08-08 | Vehicle detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0850697A true JPH0850697A (en) | 1996-02-20 |
| JP3192882B2 JP3192882B2 (en) | 2001-07-30 |
Family
ID=16173369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18558494A Expired - Fee Related JP3192882B2 (en) | 1994-08-08 | 1994-08-08 | Vehicle detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3192882B2 (en) |
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