• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a measuring train with an optical system with means for making video total images of an area of the superstructure of a railway that is located directly below the measuring train. A single light bar is located in the area of a lens, two light bars on either side thereof. From an additional light beam, the light beam shines through a light-transmitting window in the light-tight housing.
    公开号:NL2016669A
    申请号:NL2016669
    申请日:2016-04-25
    公开日:2016-10-24
    发明作者:Jagtenberg Hans
    申请人:Volkerrail Nederland Bv；
    IPC主号:
    专利说明:

    Video overall picture of the track geometry.
    The quality of the rail geometry of the superstructure of the, for example Dutch, rail network for transporting 3 people and / or goods is measured periodically. The associated information is obtained from measurement data, which is produced using measurement trains and switch inspection vehicles for the automated measurement of the track geometry of the superstructure of the railway track. Due to ongoing technical developments, the popular remote viewing, whereby the viewing person (the so-called analyst) at the office from a screen, disconnected in time, does the inspection, is constantly improved and expanded.
    The data obtained with the measurement train and points inspection vehicle must enable the railway manager to find the following defects and rail interruptions via remote inspection: 1. Missing fasteners with determination of type; 2. location of an electric separation weld; 3. crumbles; 4. cracks; 5. impressions (such as bullet holes); 6. slip / burn marks.
    The measurement train must be able to obtain the correct measurement data independently of 3 different weather conditions. These weather conditions are: outside temperatures between -20 and +40 ° C; rain up to an intensity of 27 mm / hour; fog or snowfall with a visibility of at least 100 m; as long as the railroad is not in a thick layer of snow; both by night and by day, free) from the influence of light from the environment (so a shot made at night or on a sunny day or overcast day produces the same results).
    Use is also made of video image recordings made with a camera that can be presented on a screen as a photograph or film of the railway or part thereof, so that the screen is given the analyst as closely as possible to reality. This places demands on the image quality offered by the screen, both during playback and film, and when viewing individual still images.
    The video image recording must be able to be displayed on the screen in such a way that a good visual inspection is possible. The images must be sharp. When an image recording is made from the recordings of two or more cameras, the images from these cameras must be aligned so that the same location is displayed. The video image recording must be good at any driving speed up to approximately 100 km / h for the free lane and up to approximately 50 km / h on a switch and must be suitable for automated image recognition (visual edging technology), such as component recognition, damage recognition, degradation recognition.
    A complicating factor is the measurement train that makes swinging, pounding and rolling movements while driving because the bicycles are suspended in a suspension manner. Mounting the measuring system on the non-sprung part of the measuring train, such as the wheel axles, excludes these movements, but it is not always possible or desirable, for example because vibration problems are introduced. When mounting the measuring system on the sprung part of the measuring train, such as the floor of the vehicle, allowance must be made, for example, for the wheel suspension to spring in and out, so that, for example, the distance and viewing angle between the measuring system (such as cameras and lamps) and the photographing track and roadbed varies continuously.
    For the video total image, the following requirements must also be met: in a single image recording, the two rails of the switch including the sleepers; the image capture must record a width at least equal to the width of a standard sleepers (in other words at least 2.6 meters); the image recording may be composed of image recordings from various cameras; the image must be taken from the camera position directly above the rails and the sleeper; color or black / white images; a resolution of a minimum of 1.0 x 1.0 mm of the object, for example a pixel size of a maximum of 0.7 mm.
    The object of the invention is to provide a video total image with which the above requirements are met in a reliable, durable, affordable, environmentally-friendly and reproducible manner 3 To this end, one or more of the following is proposed: a digital matrix camera (so-called area camera) ) or line scan camera; a camera of CMOS or CCD type; at least or precisely one or two cameras, preferably of line scan type and / or color type; camera pixel size at least 10 or 14 mu m (mu = micro) = 1 millionth); the camera hangs vertically straight above a rail and / or is oriented vertically downwards; the camera is aimed at a light line projected on the superstructure of the railroad by a light element; the light line is continuous from one end of the cross member to the other; 3 the part of the light line projected onto a part of the superstructure, for example rail head and possibly rail foot, is provided by a single light element and the part of the light line on one or both sides thereof by a double light element; a light element makes a light line substantially of the same length as the light element; the area of, for example, right below or above, or viewed in top view next to or around, a camera lens contains fewer light elements than the adjacent area; a long light beam, preferably at least 2 meters long, for example about 2.30 meters long 3 and / or about the same length as a sleeper; a short light beam substantially centered on the long light beam, preferably a minimum of 0.75 meters and / or a maximum of 1.50 meters long, for example approximately 1 meter long; the long and short lightbar at the same level; an extra light beam on the side of the long light beam, preferably at a lower or higher level, preferably at least 10 cm and / or at most 70 cm higher or lower, for example higher than the top of the long light beam; the additional light beam has a length at least 25% or 50% shorter than that of the short light beam and / or at least 10% or 25% of the length 3 of the short light beam, for example a length between 10 and 30 or 50 centimeters; the long and short light bars are on a common light line projected onto the railroad; the additional light beam widens the area of the railway illuminated by the long light beam by at least 15 centimeters; the light line of the additional light beam projected on the railroad is in line with and / or partially overlaps with the light line of the long light beam; the additional light beam is of double design, preferably with a mutual space of at least 5 cm and / or at most 15 or 25 cm, for example equal to that between the long and short light beam, preferably with the light beams directed at a common area; the light beam from the additional light beam falls at least in part, preferably at least 25% or 50%, through a light-transmitting window in the upward and / or laterally surrounding light-tight housing in which the cameras and light bars are accommodated; the window is at an angle between 20 and 3 75 degrees to the horizontal; the light bars contain LEDs; a beam contains LEDs in a one-dimensional pattern; a beam contains at least 20 (for example 26) LEDs per 200 millimeter beam length; the LEDs are of SMD type and / or power type (for example at least 300 or 500 mA, such as approximately) 700 mA) and / or parabolic type; each LED gives white or white blue light; a beam is equipped with a lens remote from the LEDs, preferably Fresnel lens; the camera looks down vertically or straight (or at an angle of no more than 10 or 20 degrees with the vertical) and / or between 3 long and short light bars (the gap width between them is a minimum of 5 centimeters and a maximum of 15 or 25 centimeters; free end of the lens (for example, wide angle lens) of the camera hangs approximately (for example, a maximum of 5 or 10 centimeters higher or lower) at the same level as the lens of the extra light bar and / or at a level above the level of the long light bar, preferably at least 10 or 20 centimeters higher; the cameras have a maximum of 30% and a minimum of 5% image overlap; the overlap area of the cameras is mutually aligned; the longitudinal direction of the light bars is perpendicular to that of the rail; the light bars extend horizontally; a, preferably each, light beam provides a non-diverging and / or non-converging light beam, for example substantially parallel light beam, for example a minimum of 10 and / or a maximum of 50 millimeters wide, such as approximately 30 millimeters; the common light line has a width of at least 10 and / or at most 50 millimeters, 3 for example about 30 millimeters (for example in the train's idle state); the beam beams directed at a common light line are mutually oriented such that with vertical distance variation between rail head and light beam, for example by springing in and out the spring suspension of the train wheels, over a stroke of, for example, a minimum of 10 and / or a maximum of 40 centimeters, for example approximately 20 centimeters, the common light line varies in width, for example by a maximum of 10 or 20 millimeters, preferably wherein the width 3 of the light line is maximum in the train's resting state; the light bars and cameras are mounted in a mutually fixed position, preferably fixed to the train, for example under the car floor; in the area directly below the camera the extra light bars and the short light bar are missing; is a light bar) a so-called LED line light; a light bar is a linear light source; a light beam has its light beam directed substantially vertically; two light bars run parallel to each other and / or their light beams are aimed at the same area. 3 The accompanying drawing shows one of the many embodiments of the invention.
    FIG. 1 shows in front view the railroad with at a distance above it the light-tight housing mounted therein the long light beam with centered at a distance behind (therefore not) visible and therefore shown in dotted lines) the short light beam, above the two cameras and further to the side at the same level with the cameras have the extra light bars and the light beams of the light bars and the viewing angles of the cameras are also shown in dotted lines 3 Fig. 2 shows the plan view of FIG. 1 for the light bars and cameras c. A single light bar is located in the area of a lens, two light bars on either side thereof.
    FIG. 3, the light-tight housing with a dotted line shows an additional light bar L whose light beam shines through a light-transmitting window v. The direction of travel is indicated by 3 arrow P.
    FIG. 4 shows the light bars and cameras mounted in the housing, looking into the housing from above. It is clear to see that the extra light bars have a double design.
    FIG. 5 shows the light beams coming from two light beams running parallel to each other and forming a common light line that is projected on the railroad and varies in width across the stroke height due to springing in and out while driving the measurement train. In the train's idle state, the line width projected onto the railroad is a maximum of 3 (level r at half stroke height s, which position r represents, for example, the top of the ballast bed), when springing in and out, the carriage floor w moves closer to or further from level. r. The horizontal arrow indicates the driving direction.
    FIG. 6 shows the light spectrum of the preferred LED. Many embodiments belong to the invention. A measure forms, individually or in combination with other measures as disclosed herein, the invention, optionally in combination with one or more of the other measures disclosed here, individually or in combination with other measures. Thus, it is intended that herein be a basis for each measure individually, separately from the combination in which it is disclosed here, to independently or randomly in combination with one or more other measures disclosed herein, form the basis for a patent claim.
    权利要求:
    Claims (1)
    [1]
    Measuring train with an optical system with means for making video total images of an area of the superstructure of a railroad that is located directly below the measuring train.
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    同族专利:
    公开号 | 公开日
    NL2016669B1|2018-12-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2020-03-25| PD| Change of ownership|Owner name: VOLKERWESSELS INTELLECTUELE EIGENDOM B.V.; NL Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), ASSIGNMENT; FORMER OWNER NAME: VOLKERRAIL NEDERLAND B.V. Effective date: 20200317 |
    优先权:
    申请号 | 申请日 | 专利标题
    NL2014720|2015-04-24|
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