• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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  • 引用文献
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    • 专利摘要:

    公开号:ES2883830A2
    申请号:ES202190060
    申请日:2019-04-12
    公开日:2021-12-09
    发明作者:Videira Unai Alvarado；Yagüez Diego Borro；Irizar Aiert Amundarain；Marcos Inigo Adin；Juaristi Saioa Arrizabalaga；Garate Alberto Mendikute
    申请人:Asociacion Centro Tecnologico CEIT；
    IPC主号:
    专利说明:

    [0004] Technical sector
    [0006] The present invention is related to the weighing of freight wagons of railway vehicles, the invention proposing a measurement device that allows the weighing of freight wagons in motion and without having to use invasive measurement devices that require modifying the infrastructure. of the road, or that require modifying the structure of the vehicles.
    [0008] State of the art
    [0010] The wagons of railway vehicles carry goods whose load is necessary to know, as well as the distribution of the load (for example, the load per axle of the wagon).
    [0012] This is relevant on rail yards and in loading/unloading areas ("marshalling yards"). Thus, for example, it is necessary to know the exact load of the wagon, since it must be distributed in trucks for subsequent transport by Trucks are required to comply with specific weight regulations, but in turn it is preferable to load trucks to the maximum of the permitted limit to optimize transport costs.
    [0014] The measuring devices currently used for weighing wagons are usually devices that generally determine the weight in static, with the wagon stopped, in addition to being invasive, expensive devices that require a complex installation. Thus, for example, weighing scales are known, which are an instrumented section of track ("weigh bridges") that replaces a section of track; weight sensors based on strain gauges or load cells that are integrated into the railway track (on the rails, sleepers, ...), or the weighing devices on board the wagons themselves.
    [0016] In accordance with all this, there is a need on the part of freight operators to know the load distribution of the wagons by means of a measuring device that is portable, so that its installation is not invasive on the railway infrastructure, and that allows the weight of the wagons in motion to be determined.
    [0018] Object of the invention
    [0020] The object of the present invention is a measuring device to determine the weight of freight wagons when they run on the rails of a railway track.
    [0022] The measuring device comprises:
    [0023] • non-invasive measuring means adapted to determine the displacement of at least one point of one of the rails when the wagon runs on the rail, or comprising the non-invasive measuring means:
    [0024] ■ at least one reference marker arranged at the point of the rail, and ■ at least one camera arranged to visualize the displacement of the reference marker when the wagon runs on the rail, and
    [0025] • a control unit adapted to determine the weight of the wagon by comparing the displacement of at least the point of the rail, with a reference displacement, which is related to a known reference weight.
    [0027] The non-invasive measurement means allow the displacement of the point of the rail to be determined due to the deformation suffered by the rail when the wagon passes over the rail, that is to say with the railway vehicle in motion. In addition, since the measurement means are non-invasive measurement means based on optical means, there is no need to modify the railway infrastructure to install said means. Additionally, the non-invasive measurement means are portable, so the measurement can be carried out at any point on the railway.
    [0029] In the sense of the invention, reference displacement is understood as the displacement that the point of the rail would have suffered given the known reference weight, that is, the reference displacement is known because it is directly related to a specific and also known weight. In this way, by extrapolating the displacement of the point of the rail due to the passage of the goods wagon over the rail, the weight of the wagon can be accurately determined.
    [0030] Preferably, the non-invasive measurement means comprise three reference markers, two of the three markers being arranged at two points of the rail that are vertically aligned with two respective sleepers of the railway, and the other marker being arranged at the point of the rail that It is arranged between the two sleepers, and three cameras, one for each of the markers.
    [0032] In this way, a specific arrangement of the markers is used at the points of the lane, where the displacements due to the bending of the lane by the weight of the vehicle show the greatest possible difference in displacement between the points, since the point of the lane disposed between the two sleepers is not directly supported, so that the precision for weight determination is further increased.
    [0034] Even more preferably, the non-invasive measurement means comprise six markers, three for each rail of the railway, and six cameras, one for each marker. In this way, the weight of the wagon can be determined, as well as the weight distribution of the wagon.
    [0036] Description of the figures
    [0038] Figure 1 shows a rail of a section of an empty railway line.
    [0040] Figure 2 shows the rail of the track section of the previous figure with load when a rail vehicle circulates on the rail.
    [0042] Figure 3 shows a top schematic view of the measurement device of the invention.
    [0044] Figure 4 shows a schematic side view of the device of the previous figure.
    [0046] Detailed description of the invention
    [0048] Figure 1 shows a section of a rail (r) of a section of a railway track (t) at rest, that is, without applying a load to the rail (r).
    [0050] The rail section (r) is supported on two sleepers (s1, s2). In lane (r) are represented three points (A, B, C), two of the three points (A, C) of the rail (r) are respectively aligned vertically with the two sleepers (s1, s2) of the track (t), and the other point (B) of the rail (r) is arranged between the two sleepers (s1, s2). The point (B) of the rail (r) is arranged in the middle of the two sleepers (s1, s2), that is to say at the same distance from each of the other two points (A, C).
    [0052] The union of the three points (A, B, C) define a reference line (ref). As can be seen in the figure, the three points (A, B, C) are aligned such that the reference line (ref) is horizontal.
    [0054] Figure 2 shows the section of the rail (r) when a freight wagon of a railway vehicle is running on the rail (r).
    [0056] The rail vehicle is represented by one of its wheels (wh), the wheel (wh) being vertically aligned with point (B) of the rail (r) that is arranged between the two sleepers (s1, s2). In this situation, as the wheel (wh) passes over the rail (r), the rail (r) undergoes a bending stress due to the weight of the wagon, so that each of the three points (A, B, C) undergoes a displacement (d), they essentially undergo a downward vertical displacement, so that the horizontal line that joined the three points (A, B, C) in figure 1, in figure 2 is a curve (refc).
    [0058] The invention proposes a device to determine the displacement (d) of at least one (B) of the points (A, B, C) of the rail (r) when the wagon runs on the rail (r), using means non-invasive measurement. Essentially, the invention proposes to determine the vertical displacement of at least the point (B) of the rail (r).
    [0060] Preferably, the invention proposes to determine the vertical displacement of point (B) of the rail (r) that is arranged between the two sleepers (s1, s2), specifically in the middle of the two sleepers (s1, s2), since, with this arrangement, point (B) is not directly supported on its vertical, thus resulting in the point of the rail that can suffer the greatest displacement, and therefore the one that has the greatest sensitivity for the measurements.
    [0062] The displacement of point (B) is compared with a reference displacement, said reference displacement being related to a known reference weight, so that by comparing both displacements it is possible to determine the weight of the wagon that circulates on the rail (r).
    [0064] To determine the weight of the freight wagons when they circulate on the rails (r, r') of the railway track (t), the measuring device is used that includes non-invasive measuring means that are adapted to determine the displacement (d ) of at least point (B, B') of one of the rails (r, r') when the wagon runs on the rail (r, r'), and a control unit that is adapted to determine the weight of the wagon by comparing the displacement (d) at least point (B, B') of the rail (r, r') with the reference displacement, which is related to the known reference weight.
    [0066] The non-invasive measurement means of the measurement device shown in figures 3 and 4 are based on optical means. The non-invasive measurement means comprise at least one reference marker (11,12,13,11',12',13') arranged at point (B) of the lane (r,r'), and at least one camera (14,15,16,14',15', 16') arranged to visualize the displacement of the reference marker when the wagon runs on the rail (r, r').
    [0068] As shown in Figure 4, the non-invasive measurement means comprise six reference markers (11,12,13,11',12',13'), three for each rail (r,r') of the railway (t), and six cameras (14,15,16,14',15',16'), one to view each reference marker (11,12,13,11',12',13').
    [0070] The cameras are high resolution cameras.
    [0072] The cameras are preferably arranged perpendicular to the longitudinal direction of the rail (r) and each one is aligned with one of the points (A,B,C,A',B',C') of the rail (r,r'), that is that is, the camera target is aligned with the point of the lane to be viewed.
    [0074] The measurement procedure consists of taking images of the rail points as the rail vehicle passes, digitizing said images, and determining the displacement of the rail points when the wagon runs on the rail. The weight of the wagon is determined by comparing the displacement of the rail points (r, r') with the reference displacement.
    [0076] The reference markers can be marks made on the rail itself, an LED that is fixed to the rail by means of an adhesive material or by means of a magnet, or some stickers that adhere to the lane, such as adhesive markers of a certain geometry and a certain color on a larger white background.
    [0078] The measurement device control unit comprises a communications module to send the information from the non-invasive measurement means to an external unit that the railway vehicle operator (driver) has, such as a Tablet or the like. In said external unit, the operator can configure the measurement device and view the information (for example, wagon weight, load distribution per axle, wagon ID, etc). The external unit itself can send the information to a remote database where it is stored.
    权利要求:
    Claims (7)
    [1]
    1. - Measuring device to determine the weight of freight wagons when they circulate on the rails (r, r') of a railway track (t), comprising:
    • non-invasive measuring means adapted to determine the displacement (d) of at least one point (A,B,C,A',B',C') of one of the rails (r, r') when the wagon circulates on the rail (r, r'),
    o comprising non-invasive means of measurement:
    ■ at least one reference marker (11,12,13,11',12',13') arranged at the point (A,B,C,A',B',C') of the lane (r,r' ), Y
    ■ at least one camera (14,15,16,14',15',16') arranged to visualize the displacement of the reference marker when the wagon runs on the rail (r, r'), and
    • a control unit adapted to determine the weight of the wagon by comparing the displacement (d) of at least point (A,B,C,A',B',C') of the rail (r,r') with a displacement that is related to a known reference weight.
    [2]
    2. - Device according to the preceding claim, wherein the non-invasive measurement means comprise:
    • three reference markers (11,12,13,11',12',13'), with two (11,13,11',13') of the three markers (11,12,13,11',12 ',13') arranged at two points (A,C,A',C') of the rail (r,r') that are vertically aligned with two respective sleepers (s1, s2) of the railway (t), and the other marker (12,12') being arranged at the point (B,B') of the rail (r,r') which is arranged between the two sleepers (s1, s2), and
    • three cameras (14,15,16,14',15',16'), one for each of the markers (11,12,13,11',12',13').
    [3]
    3. - Device according to the preceding claim, wherein the non-invasive measurement means comprise six markers (11,12,13,11',12',13'), three for each lane (r,r') of the road railway (t), and six cameras (14,15,16,14',15',16'), one for each marker lane.
    [4]
    4. - Device according to any one of the preceding claims, wherein the at least one camera (14,15,16,14',15',16') is arranged perpendicular to the longitudinal direction of the rail (r) and aligned with the point (B) of the rail (r,r').
    [5]
    5. - Device according to any one of the preceding claims, wherein at least one reference marker is a sticker that adheres to the rail (r, r').
    [6]
    6. - Device according to any one of claims 1 to 4, wherein at least one reference marker is an LED that is fixed to the rail (r, r').
    [7]
    7. - Device according to any one of claims 1 to 4, wherein at least one reference marker is a mark made on the rail itself (r, r').
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    同族专利:
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    WO2020208272A1|2020-10-15|
    ES2883830R2|2022-02-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JP2004212077A|2002-12-27|2004-07-29|East Japan Railway Co|Track displacement measuring method, and track displacement measuring device|
    RU2319803C1|2006-06-26|2008-03-20|Государственное образовательное учреждение высшего профессионального образования "Уральский государственный университет путей сообщения" |Method to determine elastic deflection of rails|
    CN101377433B|2007-08-30|2012-11-21|北京佳讯飞鸿电气股份有限公司|Method for measuring vehicle weight based on steel rail deformation / stress parameters|
    KR101170236B1|2010-05-13|2012-07-31|서울대학교산학협력단|Three-demensional body motion recognition method using led marker and wearable device using the same|
    DE102011086759B4|2011-11-21|2014-09-04|Bauhaus Universität Weimar|Method and device for determining wheel loads of rail vehicles|
    AT513258B1|2012-12-13|2014-03-15|Univ Wien|Method for measuring a moving vehicle|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    PCT/ES2019/070257|WO2020208272A1|2019-04-12|2019-04-12|Measuring device for determining the weight of freight wagons|
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