WO2010032695A1 - 画像処理によるパンタグラフの鉛直加速度測定装置および測定方法 - Google Patents
画像処理によるパンタグラフの鉛直加速度測定装置および測定方法 Download PDFInfo
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- WO2010032695A1 WO2010032695A1 PCT/JP2009/065950 JP2009065950W WO2010032695A1 WO 2010032695 A1 WO2010032695 A1 WO 2010032695A1 JP 2009065950 W JP2009065950 W JP 2009065950W WO 2010032695 A1 WO2010032695 A1 WO 2010032695A1
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- pantograph
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- vertical acceleration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
- B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
- B60L5/22—Supporting means for the contact bow
- B60L5/26—Half pantographs, e.g. using counter rocking beams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/26—Rail vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
- B60M1/28—Manufacturing or repairing trolley lines
Definitions
- the present invention relates to an apparatus and method for measuring the vertical acceleration of a pantograph by image processing, and in particular, images of the behavior of a pantograph installed in a running vehicle with a single line sensor, and the pantograph of a measurement point detected by image processing.
- the present invention relates to a device and a method for measuring a pantograph vertical acceleration by image processing that measures a vertical acceleration of a pantograph at an excitation point based on vertical acceleration (hereinafter referred to as vertical acceleration).
- the method using a line sensor camera has the advantage that the pantograph's vertical behavior value can be measured without contact, but it is measured at a single point away from the contact point (excitation point) between the pantograph and the trolley line. There was a problem of poor accuracy. Further, when a plurality of line sensor cameras are attached in order to improve accuracy, there is a problem that the apparatus becomes large.
- an object of the present invention is to provide an apparatus and a method for measuring a pantograph vertical acceleration by image processing that can measure the vertical acceleration of the pantograph with high accuracy with a small apparatus.
- a pantograph vertical acceleration measuring device by image processing images a pantograph with a line sensor camera attached to the vehicle, and calculates the vertical acceleration of the pantograph based on the captured image.
- An apparatus for measuring by an image processing unit wherein the image processing unit inputs an image at a measurement point of a pantograph imaged by a line sensor camera, and performs image processing on a line sensor image composed of the input image Pantograph position detection means for determining the position of the pantograph on the line sensor image by applying the pantograph position, the pantograph position on the line sensor image, one or more transfer functions determined in advance, and the displacement position of the pantograph Punter that calculates vertical acceleration at the point of contact with the line Characterized in that it comprises a rough vertical acceleration calculation means.
- the pantograph vertical acceleration measuring device by image processing according to the second invention is the pantograph vertical acceleration measuring device by image processing according to the first invention, wherein the image processing unit is perpendicular to the pantograph at one or more excitation points.
- Transfer function calculating means for calculating a transfer function based on the vertical acceleration derived from the position of the pantograph on the line sensor image when the vibration is applied and the vertical acceleration of the pantograph at one or more excitation points. It is characterized by.
- a pantograph vertical acceleration measuring device based on image processing according to a third invention is a pantograph vertical acceleration measuring device based on image processing according to the first invention, wherein the line sensor camera is installed on a camera platform so that the orientation can be adjusted. It is characterized by.
- a pantograph vertical acceleration measuring method based on image processing in which a pantograph is imaged by a line sensor camera attached to a vehicle, and the vertical acceleration of the pantograph is measured by an image processing unit based on the captured image. Then, the image data is input from the line sensor camera, the line sensor image composed of the input image data is compared with the pattern matching model registered in advance, and the position of the pantograph at the measurement point on the line sensor image is determined. Detected and contact point of the pantograph trolley line from the vertical acceleration obtained based on the position of the detected pantograph on the line sensor image, one or more transfer functions obtained in advance, and the displacement position of the pantograph The vertical acceleration at is calculated.
- the pantograph vertical acceleration measuring method by image processing according to the fifth invention is the pantograph vertical acceleration measuring method by image processing according to the fourth invention, wherein the transfer function is vertically applied to one or more excitation points with respect to the pantograph.
- the pantograph measurement point is picked up by the line sensor camera at the same time as the vibration of the direction is given, and the pantograph vertical acceleration of the pantograph at one or more excitation points and the pantograph at the measurement point on the line sensor image composed of the picked up images It is calculated from the vertical acceleration.
- the pantograph is imaged by a line sensor camera attached to the vehicle, and the vertical acceleration of the pantograph is measured based on the image captured by the image processing unit.
- An image input unit that inputs an image at a measurement point of a pantograph imaged by a line sensor camera, and an image processing unit that performs image processing on the line sensor image including the input image
- the pantograph position detecting means for obtaining the position of the pantograph on the image, the position of the pantograph on the line sensor image, one or more transfer functions obtained in advance, and the displacement position of the pantograph based on the pantograph trolley line Pantograph vertical acceleration calculation to calculate vertical acceleration
- the pantograph on the line sensor image when the image processing unit gives vertical vibrations to the pantograph at one or more excitation points the pantograph on the line sensor image when the image processing unit gives vertical vibrations to the pantograph at one or more excitation points.
- Transfer function calculating means for calculating a transfer function based on the vertical acceleration derived from the position of the sensor and the vertical acceleration of the pantograph at one or more excitation points, so that the transfer function can be calculated and the pantograph trolley in one device.
- the vertical acceleration at the contact point with the line can be measured, and convenience is improved.
- the line sensor camera is installed on the camera platform so that the orientation can be adjusted. It is possible to adjust the position so that the image can be taken, and the possibility of erroneous detection of the pantograph can be reduced.
- the pantograph is imaged by a line sensor camera attached to the vehicle, and the vertical acceleration of the pantograph is measured based on the image captured by the image processing unit.
- a method for inputting image data from a line sensor camera, comparing a line sensor image composed of the input image data with a pattern matching model registered in advance, and a pantograph at a measurement point on the line sensor image The vertical acceleration obtained based on the detected position of the pantograph on the line sensor image, one or two or more transfer functions obtained in advance, and the pantograph's displacement position, The vertical acceleration at each contact point is calculated, so non-contact and measurement results are accumulated with a small device.
- the transfer function is given a vertical vibration to one or more excitation points with respect to the pantograph, and at the same time, a pantograph is obtained by a line sensor camera.
- the measurement point is picked up and calculated from the vertical acceleration of the pantograph at one or more excitation points and the vertical acceleration of the pantograph at the measurement point on the line sensor image consisting of the picked-up images.
- the calculation of the function and the measurement of the vertical acceleration at the contact point with the trolley line of the pantograph can be performed, and the convenience is improved.
- FIG. 1 is a schematic structural diagram showing a pantograph vertical acceleration measuring apparatus by image processing according to the present embodiment
- FIG. 2 is a block diagram showing a configuration of the pantograph vertical acceleration measuring apparatus by image processing according to the present embodiment
- FIG. 4 is an explanatory diagram illustrating an example of a line sensor image
- FIG. 5 is an explanatory diagram illustrating an example of a pattern matching model.
- the pantograph vertical acceleration measuring device by image processing is composed of a line sensor camera 1 and an image processing unit 2.
- the line sensor camera 1 is installed on the roof of the vehicle 3 on which the pantograph 31 is mounted.
- the line sensor camera 1 is configured such that the elevation angle is set so that the optical axis is directed obliquely upward, and a predetermined position of the pantograph 31 is imaged as the measurement point Ps.
- the scanning line direction of the line sensor camera 1 is set to be orthogonal to the pantograph 31. That is, the scanning line direction is set to the vertical direction.
- the image processing unit 2 mainly performs a transfer function calculation process and a vertical acceleration calculation process. As shown in FIG. 2, an image input unit 21, an image recording unit 22, a pantograph position A detection unit 23, a transfer function calculation unit 24, a data recording unit 25, and a pantograph vertical acceleration calculation unit 26 are provided.
- the image input unit 21 serving as an image input unit is a unit that inputs an image captured by the line sensor camera 1 at predetermined time intervals.
- the image recording unit 22 is means for storing the image data input by the image input unit 21.
- a pattern matching model that is a model for pattern matching registered in advance is stored in the image recording unit 22.
- the pantograph position detection unit 23 as a pantograph position detection unit compares a line sensor image (see FIG. 4) in which image data stored in the image recording unit 22 are arranged in time series with the above-described pattern matching model. This is a means for extracting the locus 11 of the pantograph on the line sensor image from the background 12 and obtaining the position of the pantograph 31 on the line sensor image.
- the transfer function calculation unit 24 serving as a transfer function calculation unit is captured by the line sensor camera 1 and the behavior of the trajectory 11 of the pantograph on the line sensor image when a vertical vibration is applied to the pantograph 31 at the excitation point.
- the data recording unit 25 uses the vertical acceleration y (t) obtained by second-order differentiation of the position of the trajectory 11 of the pantograph on the line sensor image detected by the pantograph position detection unit 23, and the transfer function calculated by the transfer function calculation unit 24.
- H ( ⁇ , x) is a means for storing the vertical acceleration u (t) of the pantograph 31 obtained by the pantograph vertical acceleration calculator 26 described later.
- the image processing unit 2 first registers a pattern matching model as shown in FIG. 5 (step S1), and then performs a process of calculating a transfer function H ( ⁇ , x). (Step S2).
- the transfer function H ( ⁇ , x) is calculated as follows. First, a predetermined position Ps of the pantograph 31 is imaged as a measurement point by the line sensor camera 1, and a vertical vibration is applied to the position separated from the measurement point Ps by a known distance x W as an excitation point Pw. The vertical acceleration u (t) at the excitation point Pw of the pantograph 31 at this time is measured by an acceleration sensor (not shown).
- an image captured by the line sensor camera 1 is input at a predetermined fixed time interval in the image input unit 21 of the image processing unit 2 and stored in the image recording unit 22.
- the pantograph position detection unit 23 compares the line sensor image taken out from the image recording unit 22 with the pattern matching model registered in advance, and extracts the trajectory 11 of the pantograph on the line sensor image. The position of the pantograph 31 on the image is detected.
- the transfer function calculation unit 24 calculates the vertical acceleration obtained by second-order differentiation of the vertical acceleration u (t) at the excitation point Pw of the pantograph 31 and the position of the pantograph 31 on the line sensor image obtained by the pantograph position detection unit 23.
- the transfer function H ( ⁇ , x) is calculated by the following equation (1).
- H ( ⁇ ) Y ( ⁇ ) / U ( ⁇ ) (1)
- Y ( ⁇ ), H ( ⁇ ), and U ( ⁇ ) are the vertical acceleration y (t) of the pantograph 31 on the line sensor image, the transfer function h (t), and the vertical acceleration u of the actual pantograph 31, respectively. Represents the Fourier transform of (t).
- , x) H 2 ( ⁇ , x) may be obtained.
- the calculated transfer function H ( ⁇ , x) is stored in the data storage unit 25.
- the primary mode and the secondary mode correspond to, for example, the vibration mode 3 (bending primary mode) and the vibration mode 4 (bending secondary mode) described in FIG. To do.
- the measurement point Ps of the pantograph 31 is imaged by the line sensor camera 1 while the vehicle is running, and this is input by the image input unit 21 at predetermined time intervals and stored in the image recording unit 22 (step S3). .
- the pantograph position detection unit 23 extracts the line sensor image and the previously registered pattern matching model from the image recording unit 22 and compares them to extract the pantograph locus 11 on the line sensor image ( In step S4), the position of the pantograph 31 on the line sensor image is detected (step S5).
- the pantograph vertical acceleration calculation unit 26 separately obtains a deviation position of the trolley line 4 (excitation point Pw) by a known method, and a transfer function H n ( ⁇ , x) corresponding to the position closest to this, Using the vertical acceleration y (t) at the position Ps obtained from the change in the position of the pantograph 31 on the line sensor image, a calculation based on the following equation (4) is performed.
- U ( ⁇ , x) Y ( ⁇ ) / H ( ⁇ , x) (4)
- the vertical acceleration u (t) at the displacement position of the trolley wire 4 (excitation point Pw) is obtained (step S6).
- the acceleration at the excitation point is calculated using the transfer function, so the pantograph 31 imaged by the line sensor camera 1 is used. From the behavior of the measurement point Ps, the vertical acceleration of the pantograph 31 at the displacement position of the trolley line 4 (excitation point Pw) can be obtained with high accuracy.
- the position of the pantograph 31 on the image is detected using a pattern matching model when the transfer function is obtained.
- the method for detecting the position of the pantograph on the image is the above-described method.
- a method described in JP-A-2006-250774 may be used.
- the image recording unit 22 is provided in the image processing unit 2.
- the image captured by the line sensor camera 1 is immediately processed to detect the pantograph trajectory 11, and the pantograph vertical acceleration is detected in real time. Needless to say, various changes can be made without departing from the spirit of the present invention.
- FIG. 6 is a schematic structural view showing a pantograph vertical acceleration measuring apparatus by image processing according to the present embodiment.
- the above-described line sensor camera 1 of Embodiment 1 is installed on a pan head 5 shown in FIG.
- the central portion of the pantograph 31 is in a darkened state due to iron powder or the like adhering due to sliding of the trolley wire. For this reason, it is difficult to distinguish between the background and the pantograph 31 particularly when measurement is performed at night, and erroneous detection may occur when the trajectory of the pantograph 31 is extracted.
- the line sensor camera 1 while viewing the actual image of the line sensor camera 1, the line sensor camera 1 is mounted on the platform so that the line sensor camera 1 captures a clear image of the pantograph 31 such as the horn 31 a of the pantograph 31. It is possible to adjust the direction of the line sensor camera 1 by being installed on the top 5.
- Other configurations are substantially the same as the configurations shown in FIGS. 1 to 3 and described above, and members having the same functions are denoted by the same reference numerals, and redundant description is omitted.
- the trajectory of the pantograph 31 can be extracted with certainty. Therefore, in addition to the effects of the first embodiment, the trolley wire 4 (excitation) The vertical acceleration of the pantograph 31 at the deviation position of the point Pw) can be measured with higher accuracy.
- the present invention is applicable to a pantograph vertical acceleration measuring apparatus and measuring method by image processing.
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Abstract
Description
先ず、ラインセンサカメラ1によって測定点としてパンタグラフ31の所定の位置Psを撮像する一方、この測定点Psから既知の距離xWだけ離間した位置を加振点Pwとしてここに鉛直方向の振動を加え、このときのパンタグラフ31の加振点Pwにおける鉛直加速度u(t)を図示しない加速度センサで計測する。
H(ω)=Y(ω)/U(ω) ・・・(1)
ただし、Y(ω)、H(ω)、U(ω)は、それぞれ、ラインセンサ画像上のパンタグラフ31の鉛直加速度y(t)、伝達関数h(t)、実際のパンタグラフ31の鉛直加速度u(t)のフーリエ変換を表す。
Y(ω)=H(ω)・U(ω) ・・・(3)
この(3)式から上記(1)式が得られる。
U(ω,x)=Y(ω)/H(ω,x) ・・・(4)
これにより、トロリ線4(加振点Pw)の偏位位置における鉛直加速度u(t)が得られる(ステップS6)。
Claims (5)
- 車両に取り付けたラインセンサカメラでパンタグラフを撮像し、撮像された画像に基づいてパンタグラフの鉛直方向の加速度を画像処理部により測定する装置であって、
前記画像処理部が、前記ラインセンサカメラによって撮像した前記パンタグラフの測定点における画像を入力する画像入力手段と、入力された前記画像からなるラインセンサ画像に対して画像処理を施すことによって前記ラインセンサ画像上の前記パンタグラフの位置を求めるパンタグラフ位置検出手段と、前記ラインセンサ画像上のパンタグラフの位置、予め求めた1又は2以上の伝達関数および前記パンタグラフの偏位位置に基づき前記パンタグラフのトロリ線との接触点における鉛直方向の加速度を算出するパンタグラフ鉛直加速度算出手段とを備えることを特徴とする画像処理によるパンタグラフ鉛直加速度測定装置。 - 前記画像処理部が、1又は2以上の加振点において前記パンタグラフに鉛直方向の振動を与えたときの前記ラインセンサ画像上の前記パンタグラフの位置から導出した鉛直方向の加速度及び前記加振点における前記パンタグラフの鉛直方向の加速度とに基づいて前記伝達関数を算出する伝達関数算出手段を備えることを特徴とする請求項1記載の画像処理によるパンタグラフ鉛直加速度測定装置。
- 前記ラインセンサカメラが雲台上に設置されて向きを調整可能に構成されていることを特徴とする請求項1記載の画像処理によるパンタグラフ鉛直加速度測定装置。
- 車両に取り付けたラインセンサカメラでパンタグラフを撮像し、撮像された画像に基づいてパンタグラフの鉛直方向の加速度を画像処理部により測定する方法であって、
前記ラインセンサカメラから画像データを入力し、
入力された前記画像データからなるラインセンサ画像と予め登録しておいたパタンマッチ用モデルとを比較してラインセンサ画像上の測定点におけるパンタグラフの位置を検出し、
検出されたパンタグラフのラインセンサ画像上の位置に基づいて求めた鉛直方向の加速度と、予め求めた1又は2以上の伝達関数と、前記パンタグラフの偏位位置とから前記パンタグラフのトロリ線との接触点における鉛直方向の加速度を算出する
ことを特徴とする画像処理によるパンタグラフ鉛直加速度測定方法。 - 前記伝達関数を、前記パンタグラフに対して1又は2以上の加振点に鉛直方向の振動を与えると同時に、前記ラインセンサカメラによって前記パンタグラフの測定点を撮像し、
前記加振点におけるパンタグラフの鉛直方向の加速度及び撮像された画像からなるラインセンサ画像上の前記測定点におけるパンタグラフの鉛直方向の加速度とから算出する
ことを特徴とする請求項4記載の画像処理によるパンタグラフ鉛直加速度測定方法。
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CN2009801364657A CN102159954B (zh) | 2008-09-17 | 2009-09-11 | 基于图像处理的比例绘图器的铅垂加速度测定装置以及测定方法 |
EP09814540.2A EP2325656B1 (en) | 2008-09-17 | 2009-09-11 | Device and method for measuring vertical acceleration of pantograph by image processing |
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Also Published As
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EP2325656A4 (en) | 2014-02-26 |
RU2459213C1 (ru) | 2012-08-20 |
EP2325656B1 (en) | 2017-08-09 |
CN102159954B (zh) | 2012-11-07 |
EP2325656A1 (en) | 2011-05-25 |
JP5151845B2 (ja) | 2013-02-27 |
CN102159954A (zh) | 2011-08-17 |
JP2010071706A (ja) | 2010-04-02 |
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