JP2000346856A - Method and device for measurement of speed of traveling body - Google Patents
Method and device for measurement of speed of traveling bodyInfo
- Publication number
- JP2000346856A JP2000346856A JP11159155A JP15915599A JP2000346856A JP 2000346856 A JP2000346856 A JP 2000346856A JP 11159155 A JP11159155 A JP 11159155A JP 15915599 A JP15915599 A JP 15915599A JP 2000346856 A JP2000346856 A JP 2000346856A
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- Prior art keywords
- angle
- view
- distance
- speed
- measuring
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Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、予め定められた走
行車線を走行する車両等、予め定められた位置を通過す
る移動体の移動速度を測定する移動体の速度測定方法及
びその装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for measuring the speed of a moving object that measures the moving speed of a moving object passing through a predetermined position, such as a vehicle traveling in a predetermined traveling lane.
【0002】[0002]
【従来の技術】速度違反車両の検出等に使用する速度測
定装置は、例えば特願平8−42195号公報「速度監
視記録装置」に開示されている装置のように、レーダ速
度測定器を用い、被測定車両からのドップラ周波数を受
信して走行速度を計測する装置や電磁波の替わりに音波
を用いた同様の装置。例えば特願平10−369714
号公報「速度測定器及び速度違反車両取締システム」に
開示されている装置のように、光学式距離計を用いて単
位時間当たりの距離データの変化量によって走行速度を
計測する装置。例えば特願平11−91847号公報
「速度違反車両検出装置」に開示されている装置のよう
に、光送受光器を用いて所定距離を通過する車両の通過
時間を検出する装置等がある。2. Description of the Related Art A speed measuring device used for detecting a speeding vehicle uses a radar speed measuring device as disclosed in, for example, Japanese Patent Application No. 8-42195 "speed monitoring recording device". A device that measures the traveling speed by receiving a Doppler frequency from a vehicle to be measured, or a similar device that uses sound waves instead of electromagnetic waves. For example, Japanese Patent Application No. 10-369714
A device that measures a traveling speed based on a change amount of distance data per unit time using an optical range finder, such as a device disclosed in Japanese Patent Application Publication No. 2000-151, “speed measuring device and speeding vehicle control system”. For example, there is an apparatus for detecting the transit time of a vehicle passing a predetermined distance by using an optical transmitter / receiver, such as an apparatus disclosed in Japanese Patent Application No. 11-91847 "Speed Violating Vehicle Detecting Apparatus".
【0003】[0003]
【発明が解決しようとする課題】上記のように従来のこ
の種の移動体の速度測定装置は、何れも測定装置から光
線や音波,電波等を出射して速度の測定を行っているの
で、装置がそれだけ複雑になる。設置場所の制約を受け
易い。速度取締に用いる場合に気づかれ易い等の問題点
があった。As described above, all of the conventional speed measuring devices for moving objects emit light, sound waves, radio waves, and the like from the measuring device to measure the speed. The device becomes more complicated. It is easily affected by installation location restrictions. There are problems such as being easily noticed when used for speed control.
【0004】本発明はかかる問題点を解決するためにな
されたものであり、移動体を撮影するためそれぞれ所定
間隔で所定方向に向けて設置された2台のビデオカメラ
で撮影される移動体の画像信号を信号処理することによ
り、撮影された移動体の移動速度を計測する移動体の速
度測定方法及びその装置を提供することを目的としてい
る。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has been made to solve the above-mentioned problems. In order to photograph a moving object, the moving object is photographed by two video cameras installed at predetermined intervals in a predetermined direction. An object of the present invention is to provide a moving body speed measuring method and a moving body measuring method which measures a moving speed of a moving body taken by performing signal processing on an image signal.
【0005】[0005]
【課題を解決するための手段】本発明の移動体の速度測
定方法は、予め定められた位置を通過する移動体の移動
速度を遠隔から測定する移動体の速度測定方法におい
て、画角の両端に当たるビデオメモリの明度または(及
び)色相変化をそれぞれ検出する手段とそれぞれの変化
時間を計時するタイマ手段とを持つビデオカメラを2台
用い、前記2台のビデオカメラをそれぞれ通過する移動
体を斜め前方から捕らえられるように、且つそれぞれの
ビデオカメラの画角の両端が移動体の通過位置で交差
(クロス)するように、且つ適当な距離H離して、設置
することで、移動体が通過する前記画角の両端の交点間
の距離Lを、前記距離H,線H(距離Hを形成する直線
を言う)の方向,各ビデオカメラの画角,各ビデオカメ
ラの画角中心方向と前記線Hとが成す角度とから計算
し、前記ビデオメモリの変化により移動体がこの距離L
を通過する時間を計測して、当該移動体の速度を測定す
ることを特徴とする。A moving object speed measuring method according to the present invention is a moving object speed measuring method for remotely measuring a moving speed of a moving object passing through a predetermined position. In this case, two video cameras each having a means for detecting a change in brightness or (and / or hue) of a video memory and a timer means for measuring the time of each change are used, and a moving object passing through each of the two video cameras is tilted. The mobile body passes by being installed so that it can be captured from the front and both ends of the angle of view of each video camera intersect (cross) at the passing position of the mobile body and at an appropriate distance H. The distance L between the intersections at both ends of the angle of view is defined as the distance H, the direction of the line H (the straight line forming the distance H), the angle of view of each video camera, and the center direction of the angle of view of each video camera. Calculated from the angle between the line H, wherein the distance is mobile by a change in the video memory L
And measuring the speed of the moving object by measuring the time required to pass through.
【0006】また本発明の移動体の速度測定装置は、予
め定められた位置を通過する移動体の移動速度を遠隔か
ら測定する移動体の速度測定装置において、通過する移
動体を斜め前方からそれぞれ捕らえられるように、且つ
それぞれの画角の両端が移動体の通過位置で交差(クロ
ス)するように、且つ適当な距離H離して、設置され
る、前記画角の両端に当たるビデオメモリの明度または
(及び)色相変化をそれぞれ検出する手段とそれぞれの
変化時間を計時するタイマ手段とを持つビデオカメラ2
台と、移動体が通過する前記画角の両端の交点間の距離
Lを、前記距離H,線H(距離Hを形成する直線を言
う)の方向,各ビデオカメラの画角,各ビデオカメラの
画角中心方向と前記線Hとが成す角度とから計算する計
算手段と、移動体が前記計算した距離Lを通過する時間
を前記ビデオメモリの変化により計測し、当該移動体の
速度を測定する演算手段とを備えたことを特徴とする。
また前記画角はビデオカメラの画角の中に設定される検
出画角であり、前記画角の両端に当たるビデオメモリ
を、前記検出画角を形成する2本の特定縦列のビデオメ
モリとしたことを特徴とする。Further, according to the present invention, there is provided a moving body speed measuring apparatus for remotely measuring a moving speed of a moving body passing through a predetermined position. The brightness or brightness of the video memory corresponding to both ends of the angle of view, which is installed so as to be caught and both ends of each angle of view intersect (cross) at the passing position of the moving object and at an appropriate distance H (And) a video camera 2 having means for detecting a hue change and timer means for measuring the time of each change
The distance L between the table and the intersection of the two ends of the angle of view through which the moving object passes is defined by the distance H, the direction of the line H (refers to a straight line forming the distance H), the angle of view of each video camera, each video camera Calculating means for calculating from the direction of the angle of view center and the angle formed by the line H, and measuring the time required for the moving body to pass the calculated distance L by changing the video memory, and measuring the speed of the moving body. Computing means for performing the operation.
The angle of view is a detection angle of view set within the angle of view of a video camera, and video memories at both ends of the angle of view are two specific columns of video memories forming the detection angle of view. It is characterized by.
【0007】[0007]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。図1は本発明の一実施形態を説明
するための図である。本発明の移動体の速度測定方法
は、始めに2台のビデオカメラA,Bをそれぞれ通過す
る移動体が斜め前方から捕らえられるように、適当な距
離(H)離し、且つ2台のビデオカメラの画角(もしく
は後述するように検出画角)の両端が移動体の通過位置
で交差(クロス)するように設置する。従ってこれらの
ビデオカメラA,Bで撮影される画像は、移動体が通過
した場合、それぞれ図1下図のように、時間の経過と共
に同じように移動体の通過を捕らえることができる。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram for explaining an embodiment of the present invention. The method for measuring the speed of a moving object according to the present invention is based on the two video cameras A and B separated by an appropriate distance (H) so that the moving object passing through the two video cameras A and B can be captured from obliquely forward. (Or a detection angle of view, as will be described later), such that both ends cross each other at the passing position of the moving object. Therefore, when the moving object passes through the images captured by the video cameras A and B, the passing of the moving object can be similarly captured over time as shown in the lower diagram of FIG.
【0008】またこれらのビデオカメラA,Bは、特定
のビデオメモリの変化(図1の実施形態ではビデオメモ
リの特定縦列の変化)を検出する手段を持たせており
(図示せず)、すなわち上述の検出画角を形成する線a
1,線a2または線b1,線b2の明度または(及び)
色相が変化した場合、瞬時にそれを検出してトリガ信号
を出力し、このトリガ信号がタイマ手段(同じく図示せ
ず)に入力されて線a1,線a2,線b1,線b2に変
化があった時間が記録されるように構成されている。The video cameras A and B have means (not shown) for detecting a change in a specific video memory (in the embodiment of FIG. 1, a change in a specific column of the video memory). Line a forming the above-mentioned detection angle of view
1, the brightness of line a2 or line b1, line b2 or (and)
When the hue changes, it is detected instantaneously and a trigger signal is output, and this trigger signal is input to timer means (also not shown), and the line a1, line a2, line b1, and line b2 change. Is configured to be recorded.
【0009】すなわちビデオカメラA,Bを図1上図に
示すように道路脇に設置した場合、車両の通過が無けれ
ば両ビデオカメラは単に背景の静止画像を写し出してい
るだけなのでトリガ信号は出力されないが、車両が通過
した場合、線a1及び線b1に車両の先端(前部右端)
が達する同時点でそれぞれトリガ信号が出力され、さら
に車両が進行して線a2,b2に車両の先端が達する同
時点でそれぞれトリガ信号が出力され、結果として線a
1−a2間および線b1−b2間を車両が通過した時間
(同じ時間となるが)が計測できるようになっている。
従って検出画角を形成する線a1,a2と線b1,b2
とを車両の通過位置で交差するように2台のビデオカメ
ラを設置しておけば、2つの交点(P,Qで示す)間の
距離は、ビデオカメラA,B間の距離Hと,線H(距離
Hを形成する直線を言う。以下同じ)の方向、及び各ビ
デオカメラの検出画角と,その画角中心方向と線Hとが
成す角度、とから計算でき、且つこの距離を通過した時
間はトリガ信号を計測するタイマ手段によって計測でき
るので、通過した車両の速度が測定できるようになる。
以下、この測定動作を図1及び点P−Q間の距離を求め
る方法を説明した図2−図4を用いて説明する。In other words, when the video cameras A and B are installed on the side of the road as shown in the upper diagram of FIG. 1, if no vehicle passes, the trigger signals are output because both video cameras merely show a still image of the background. However, when the vehicle passes, the leading end (front right end) of the vehicle is drawn on the line a1 and the line b1.
Trigger signals are output at the same time when the vehicle reaches, and at the same time when the vehicle advances and the leading edge of the vehicle reaches the lines a2 and b2, the trigger signal is output.
The time (although the same time) when the vehicle passed between 1-a2 and between lines b1-b2 can be measured.
Therefore, the lines a1 and a2 and the lines b1 and b2 forming the detection angle of view
If two video cameras are installed so that they intersect at the passing position of the vehicle, the distance between the two intersections (indicated by P and Q) is the distance H between the video cameras A and B and the line H can be calculated from the direction of H (refers to a straight line forming the distance H; the same applies hereinafter), the angle of view detected by each video camera, and the angle between the center of the angle of view and the line H, and passes through this distance. The elapsed time can be measured by the timer means for measuring the trigger signal, so that the speed of the passing vehicle can be measured.
Hereinafter, this measuring operation will be described with reference to FIG. 1 and FIGS. 2 to 4 which illustrate a method of obtaining the distance between the points P and Q.
【0010】ビデオカメラA,Bを距離H離して設置し
た場合、線HがY軸となるXY座標を想定する。ビデオ
カメラAのレンズ中心位置はA(0,0)、ビデオカメ
ラBのレンズ中心位置はB(0,H)となる。またY軸
とビデオカメラAの画角中心方向(図示せず)とが成す
角はカメラAを設置するときに実測でき、またカメラA
の画角(もしくは検出画角)も予め解っているので、角
θa1は計算でき、角θa2も計算できる。同様にY軸
とビデオカメラBの画角中心方向(図示せず)とが成す
角はカメラBを設置するときに実測でき、またビデオカ
メラBの画角(もしくは検出画角)も予め解っているの
で、角θb1は計算でき、角θb2も計算できる。When the video cameras A and B are installed at a distance H, it is assumed that the line H is an XY coordinate with the Y axis as the Y axis. The center position of the lens of the video camera A is A (0, 0), and the center position of the lens of the video camera B is B (0, H). The angle formed between the Y axis and the direction of the center of the angle of view (not shown) of the video camera A can be measured when the camera A is installed.
Since the angle of view (or the detected angle of view) is known in advance, the angle θa1 can be calculated, and the angle θa2 can also be calculated. Similarly, the angle formed by the Y axis and the direction of the center of the angle of view (not shown) of the video camera B can be measured when the camera B is installed, and the angle of view (or the detected angle of view) of the video camera B is determined in advance. Therefore, the angle θb1 can be calculated, and the angle θb2 can also be calculated.
【0011】また点Pは線a1,b1の交点、点Qは線
a2,b2の交点であるので、それぞれ式(1)〜
(4)により、点Pの座標(xp,yp),点Qの座標
(xq,yq)位置が計算により求まる。また距離P−
Q=Lは、式(5)より得られるので、結局この2台の
ビデオカメラA,Bの設置間隔及び設置方向で距離P−
Qを算出でき、またその間を通過した移動体の通過時間
は特定ビデオメモリの変化を検出して計測でき、従って
演算により当該移動体の移動速度を測定することができ
る。The point P is the intersection of the lines a1 and b1, and the point Q is the intersection of the lines a2 and b2.
According to (4), the coordinates (xp, yp) of the point P and the coordinates (xq, yq) of the point Q are obtained by calculation. The distance P-
Since Q = L can be obtained from the equation (5), the distance P−L in the installation interval and the installation direction of the two video cameras A and B is eventually obtained.
Q can be calculated, and the transit time of a moving object passing therethrough can be measured by detecting a change in a specific video memory, so that the moving speed of the moving object can be measured by calculation.
【0012】そしてこのビデオカメラA,Bは、通常の
ビデオカメラに特定のビデオメモリ群の明度または(及
び)色相の変化を検出する手段と、タイマ手段とを持た
せるだけで構成でき、設置条件も2台のビデオカメラを
それぞれ通過する移動体が斜め前方から捕らえられるよ
うに、また2台のビデオカメラの画角(もしくは検出画
角)の両端が移動体の通過位置で交差(クロス)するよ
うに、適当な距離(H)離して設置するだけで良く、従
来のこの種の速度測定装置のように、測定装置から光線
や音波,電波等を出射することなく、且つ移動体の通過
位置に測定装置を設置したり、移動体の通過位置で距離
の計測を行ったりする必要なく、移動体の移動速度が測
定できるようになる。The video cameras A and B can be constructed by merely providing a normal video camera with a means for detecting a change in brightness or (and / or hue) of a specific video memory group and a timer means. Also, the moving bodies passing through the two video cameras respectively are captured from diagonally forward, and both ends of the angle of view (or detection angle of view) of the two video cameras intersect (cross) at the passing position of the moving bodies. In this way, it is only necessary to set them at an appropriate distance (H), and unlike a conventional speed measuring device of this type, a light beam, a sound wave, a radio wave, or the like is not emitted from the measuring device, and the passing position of the moving body is not changed. It is possible to measure the moving speed of the moving body without having to install a measuring device in the vehicle or to measure the distance at the passing position of the moving body.
【0013】なお2台のビデオカメラA,Bをそれぞれ
斜め前方から通過する移動体を捕らえられるように設置
するのは、両方のビデオカメラで車両の同じ位置の通過
を計測できるようにするためのでる。移動体がP,Q点
を正確に通過しなかった場合、測定誤差が生じることに
なるが、この誤差は実測上小さいので特に問題はない。
また上述の実施形態では速度測定方法についてだけ述べ
ており、速度測定装置については特に言及していない
が、このような2台のビデオカメラが上述のような条件
で設置され、計算手段と演算手段とを備えた装置が装置
構成となるだけで動作原理は同じであり、その説明は省
略する。また上述の実施形態では、ビデオカメラの画角
と検出画角とが異なるものとして説明しているが、ビデ
オカメラの画角と検出画角とが同じであっても良く(そ
の場合、線a1,a2,b1,b2はそれぞれ画面両端
に位置することになる)、また線a1,a2,b1,b
2のように、ビデオメモリの特定縦列全体で変化を検出
する構成としているが、必ずしも縦列に限定されるもの
でないことは言うまでもない。The two video cameras A and B are installed so as to be able to catch a moving object passing obliquely from the front, so that both video cameras can measure the passage of the vehicle at the same position. Out. If the moving object does not pass through the points P and Q accurately, a measurement error will occur. However, since this error is small in actual measurement, there is no particular problem.
In the above-described embodiment, only the speed measuring method is described, and the speed measuring device is not particularly described. However, such two video cameras are installed under the above-described conditions, and the calculating means and the calculating means are used. The operation principle is the same except that the device having the above has the device configuration, and the description thereof is omitted. In the above embodiment, the angle of view of the video camera and the angle of view are different from each other. However, the angle of view of the video camera and the angle of view may be the same (in this case, the line a1) , A2, b1, b2 are located at both ends of the screen, respectively), and lines a1, a2, b1, b
As shown in FIG. 2, the change is detected in the entire specific column of the video memory, but it is needless to say that the change is not necessarily limited to the column.
【0014】[0014]
【発明の効果】以上説明したように本発明の移動体の速
度測定方法及びその装置は、特定位置のビデオメモリの
変化を計時できる2台のビデオカメラを所定条件で遠隔
設置するだけで、予め定められた位置を通過する移動体
の移動速度を測定でき、装置の簡略化,隠匿化が図れる
と共に、設置場所の制約等を大幅に緩和できる等の効果
がある。As described above, the method and apparatus for measuring the speed of a moving object according to the present invention require only two video cameras capable of measuring a change in the video memory at a specific position under remote conditions under predetermined conditions. The moving speed of a moving object passing through a predetermined position can be measured, and the apparatus can be simplified and concealed, and the restrictions on the installation location can be greatly eased.
【図1】本発明の一実施形態を説明するための図であ
る。FIG. 1 is a diagram for explaining an embodiment of the present invention.
【図2】点P−Q間の距離を求める方法を説明するため
の図である。FIG. 2 is a diagram for explaining a method of obtaining a distance between points PQ.
【図3】点P−Q間の距離を求める方法を説明するため
の図である。FIG. 3 is a diagram for explaining a method of obtaining a distance between points PQ.
【図4】点P−Q間の距離を求める方法を説明するため
の図である。FIG. 4 is a diagram for explaining a method of obtaining a distance between points P and Q.
a1,a2 ビデオカメラAの検出画角を形成する特定
縦列 b1,b2 ビデオカメラBの検出画角を形成する特定
縦列a1, a2 Specific columns forming the detection angle of view of video camera A b1, b2 Specific columns forming the detection angle of view of video camera B
Claims (3)
移動速度を遠隔から測定する移動体の速度測定方法にお
いて、 画角の両端に当たるビデオメモリの明度または(及び)
色相変化をそれぞれ検出する手段とそれぞれの変化時間
を計時するタイマ手段とを持つビデオカメラを2台用
い、 前記2台のビデオカメラをそれぞれ通過する移動体を斜
め前方から捕らえられるように、且つそれぞれのビデオ
カメラの画角の両端が移動体の通過位置で交差(クロ
ス)するように、且つ適当な距離H離して、設置するこ
とで、 移動体が通過する前記画角の両端の交点間の距離Lを、
前記距離H,線H(距離Hを形成する直線を言う)の方
向,各ビデオカメラの画角,各ビデオカメラの画角中心
方向と前記線Hとが成す角度とから計算し、前記ビデオ
メモリの変化により移動体がこの距離Lを通過する時間
を計測して、当該移動体の速度を測定する移動体の速度
測定方法。1. A method of measuring a moving speed of a moving body, which remotely measures a moving speed of the moving body passing through a predetermined position, comprising: a lightness of a video memory corresponding to both ends of an angle of view;
Using two video cameras each having a means for detecting a hue change and a timer means for measuring the time of each change, so that a moving object passing through each of the two video cameras can be captured from diagonally forward, and The video camera is installed such that both ends of the angle of view of the video camera intersect (cross) at the passing position of the moving body and at an appropriate distance H, so that the intersection between the two ends of the angle of view through which the moving body passes is provided. Distance L,
The video memory is calculated based on the distance H, the direction of the line H (refers to a straight line forming the distance H), the angle of view of each video camera, the center of the angle of view of each video camera, and the angle formed by the line H. And measuring the speed of the moving body by measuring the time required for the moving body to pass through the distance L in accordance with the change in the speed of the moving body.
移動速度を遠隔から測定する移動体の速度測定装置にお
いて、 通過する移動体を斜め前方からそれぞれ捕らえられるよ
うに、且つそれぞれの画角の両端が移動体の通過位置で
交差(クロス)するように、且つ適当な距離H離して、
設置される、 前記画角の両端に当たるビデオメモリの明度または(及
び)色相変化をそれぞれ検出する手段とそれぞれの変化
時間を計時するタイマ手段とを持つビデオカメラ2台
と、 移動体が通過する前記画角の両端の交点間の距離Lを、
前記距離H,線H(距離Hを形成する直線を言う)の方
向,各ビデオカメラの画角,各ビデオカメラの画角中心
方向と前記線Hとが成す角度とから計算する計算手段
と、 移動体が前記計算した距離Lを通過する時間を前記ビデ
オメモリの変化により計測し、当該移動体の速度を測定
する演算手段とを備えたことを特徴とする移動体の速度
測定装置。2. A moving body speed measuring apparatus for remotely measuring a moving speed of a moving body passing through a predetermined position, wherein the moving body passing through the predetermined position is captured from diagonally forward and each angle of view. , So that both ends of the two cross at the passing position of the moving body, and are separated by an appropriate distance H,
Two video cameras having means for detecting changes in brightness or (and / or hue) of the video memory at both ends of the angle of view, and timer means for measuring the time of each change; and The distance L between the intersections at both ends of the angle of view is
Calculating means for calculating from the distance H, the direction of the line H (refer to a straight line forming the distance H), the angle of view of each video camera, the direction of the center of the angle of view of each video camera, and the angle formed by the line H; A speed measuring device for a moving object, comprising: a calculating means for measuring a time required for the moving object to pass through the calculated distance L based on a change in the video memory and measuring a speed of the moving object.
おいて、 前記画角はビデオカメラの画角の中に設定される検出画
角であり、 前記画角の両端に当たるビデオメモリを、前記検出画角
を形成する2本の特定縦列のビデオメモリとしたことを
特徴とする移動体の速度測定装置。3. The moving object speed measuring apparatus according to claim 2, wherein the angle of view is a detection angle of view set in the angle of view of a video camera, and the video memory corresponding to both ends of the angle of view is stored in the video memory. A moving object speed measuring device comprising two specific columns of video memories forming a detection angle of view.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11159155A JP2000346856A (en) | 1999-06-07 | 1999-06-07 | Method and device for measurement of speed of traveling body |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11159155A JP2000346856A (en) | 1999-06-07 | 1999-06-07 | Method and device for measurement of speed of traveling body |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2000346856A true JP2000346856A (en) | 2000-12-15 |
Family
ID=15687479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11159155A Pending JP2000346856A (en) | 1999-06-07 | 1999-06-07 | Method and device for measurement of speed of traveling body |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2000346856A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6675121B1 (en) * | 1999-07-06 | 2004-01-06 | Larry C. Hardin | Velocity measuring system |
KR20040043558A (en) * | 2002-11-19 | 2004-05-24 | 한국항공우주연구원 | Movable Speed Calibration Method and Equipment for Aircraft |
CN100433071C (en) * | 2005-07-11 | 2008-11-12 | 上海高德威智能交通系统有限公司 | System and method for automatically collecting vehicle information |
CN101968926A (en) * | 2010-11-02 | 2011-02-09 | 山东鼎讯信息产业有限公司 | Double-camera velocimeter |
CN105334541A (en) * | 2015-12-01 | 2016-02-17 | 山东大学 | Portable resistivity method advanced forecasting system and method applicable to TBM |
CN106803350A (en) * | 2017-03-06 | 2017-06-06 | 中山大学 | A kind of vehicle speed detection method and device based on camera shooting time difference |
CN107462741A (en) * | 2017-07-26 | 2017-12-12 | 武汉船用机械有限责任公司 | A kind of moving object speed and acceleration measurement device |
-
1999
- 1999-06-07 JP JP11159155A patent/JP2000346856A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6675121B1 (en) * | 1999-07-06 | 2004-01-06 | Larry C. Hardin | Velocity measuring system |
KR20040043558A (en) * | 2002-11-19 | 2004-05-24 | 한국항공우주연구원 | Movable Speed Calibration Method and Equipment for Aircraft |
CN100433071C (en) * | 2005-07-11 | 2008-11-12 | 上海高德威智能交通系统有限公司 | System and method for automatically collecting vehicle information |
CN101968926A (en) * | 2010-11-02 | 2011-02-09 | 山东鼎讯信息产业有限公司 | Double-camera velocimeter |
CN105334541A (en) * | 2015-12-01 | 2016-02-17 | 山东大学 | Portable resistivity method advanced forecasting system and method applicable to TBM |
CN106803350A (en) * | 2017-03-06 | 2017-06-06 | 中山大学 | A kind of vehicle speed detection method and device based on camera shooting time difference |
CN107462741A (en) * | 2017-07-26 | 2017-12-12 | 武汉船用机械有限责任公司 | A kind of moving object speed and acceleration measurement device |
CN107462741B (en) * | 2017-07-26 | 2019-12-31 | 武汉船用机械有限责任公司 | Moving object speed and acceleration measuring device |
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