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EP-4293317-B1 - ONLINE HIGH-PRECISION MEASURING DEVICE AND METHOD FOR FULL-SIZE PARAMETERS OF WHEEL SET OF RAIL TRANSIT VEHICLE

EP4293317B1EP 4293317 B1EP4293317 B1EP 4293317B1EP-4293317-B1

Inventors

  • ZHOU, Haiquan
  • PENG, Youle
  • ZHU, Desheng
  • JIANG, XI
  • ZHOU, WENJIN
  • ZHOU, Jincheng
  • WU, Fangbo

Dates

Publication Date
20260506
Application Date
20230329

Claims (10)

  1. An online high-precision measuring device for full-size parameters of a wheel set (1) of a rail transit vehicle, comprising: a first laser sensor (3), a second laser sensor (4), a third laser sensor (5), a track (2) with a slit (201) and a polygon measuring module (6), wherein the first laser sensor (3) is arranged on an inner side of the track (2) bearing the wheel set (1) and configured to emit a laser beam to irradiate an inner side surface (101) of the wheel set (1) for determining an inner distance (L1) of the wheel set (1); the second laser sensor (4) is arranged below the track (2) and configured to emit a laser to pass through the slit (201) formed in the track (2) and located above the second laser sensor (4) to irradiate a tread (102) of the wheel set (1) for determining a profile of the tread (102); and the slit is configured such that the laser beam emitted by the second laser sensor fully passes through the slit; the third laser sensor (5) is arranged on an outer side of the track (2) and configured to emit a laser beam to irradiate an axle lower profile (111) of the wheel set (1) for determining position data of the axle lower profile (111); the polygon measuring module (6) is butted with the track (2) and is configured to measure a radial runout value of the tread (102) of the wheel set (1); the polygon measuring module (6) comprises a floating probe (602), and the floating probe (602) is supported by a spring to float up and down, and maintains contact with the tread (102) of the wheel set (1), such that the radial runout value of the tread (102) of the wheel set (1) is determined; and the online high-precision measuring device is configured to process data measured by the first, second and third sensors to calculate the inner distance, the profile, an equivalent conicity, a wheel diameter, a wheel polygon value and the radial runout value.
  2. The measuring device according to claim 1, wherein the polygon measuring module (6) further comprises a guide rail (601) and a displacement sensor (603); the guide rail (601) is a main supporting structure of the polygon measuring module (6), and is butted with the track (2) to support movement of the wheel set (1) and provide guidance; and the displacement sensor (603) is configured to measure an up and down floating distance of the floating probe (602).
  3. The measuring device according to claim 1, wherein a distance between a contact point of the floating probe (602) and the tread (102) of the wheel set (1) and an inner side surface (101) of a wheel in the wheel set (1) is ΔL=70 mm.
  4. The measuring device according to claim 1, wherein the first laser sensor (3), the second laser sensor (4) and the third laser sensor (5) each are provided with two laser sensing devices; and the two laser sensing devices are symmetrically distributed along a center line of the track (2).
  5. The measuring device according to claim 3, wherein the first laser sensor (3), the second laser sensor (4) and the third laser sensor (5) each are arranged on the track (2) at a certain angle, and remain relatively static with the track (2).
  6. The measuring device according to claim 3, wherein the first laser sensor (3), the second laser sensor (4) and the third laser sensor (5) each are provided with a wheel sensor configured to detect whether the wheel set (1) reaches a measuring position.
  7. An online high-precision measuring method for full-size parameters of a wheel set (1) of a rail transit vehicle, using the measuring device according to claim 1, and comprising: S100: measuring and storing the data of the inner distance (L1) of the wheel set (1) using the first laser sensor (3), and measuring and storing the data of the profile of the tread (102) of the wheel set (1) using the second laser sensor (4); S200: processing the measured data of the inner distance (L1) and the profile, and calculating an equivalent conicity; S300: measuring and storing the data of the axle lower profile (111) of the wheel set (1) using the third laser sensor (5); S400: calculating a spatial height position of a center of an axle of the wheel set (1) relative to an upper surface of the track (2) through algorithm analysis, so as to calculate a wheel diameter of the wheel set (1); S500: rolling the wheel set from the polygon measuring module (6) to make the floating probe (602) contact with the tread (102) of the wheel set (1), so as to measure the radial runout value of the tread (102); S600: calculating a wheel polygon value of the wheel set (1) through algorithm analysis according to the measured wheel diameter and radial runout value; and S700: outputting a data report of the profile, the wheel diameter, the equivalent conicity, and the wheel polygon value.
  8. The measuring method according to claim 7, wherein in steps S100 and S300, the first laser sensor (3), the second laser sensor (4) and the third laser sensor (5) each are provided with a wheel sensor at a measuring position, and the wheel sensor is configured to detect whether the wheel reaches the measuring position.
  9. The measuring method according to claim 7, wherein in steps S100 and S300, the first laser sensor (3), the second laser sensor (4) and the third laser sensor (5) do not move with the wheel set (1), and remain relatively static.
  10. The measuring method according to claim 7, wherein in step S500, the up and down floating distance of the floating probe (602) is determined using the displacement sensor (603), and the radial runout value of the tread (102) of the wheel set (1) is determined.

Description

TECHNICAL FIELD The present disclosure relates to the technical field of online detection and measurement of geometric shape and parameters of wheel sets of rail transit vehicles, and in particular, to an online high-precision measuring device and method for full-size parameters of a wheel set of a rail transit vehicle. BACKGROUND The wheel set, as a core component of the rail transit train, plays an important role in carrying, guiding, traction and braking. Chinese rail transit has the characteristics of large speed range, wide region and complex line conditions. The wheel wear always exists, and the equivalent conicity and wheel polygon overrun of the wheel set often occur. The wheel wear affects the running stability and comfort of rail transit trains, and the equivalent conicity and wheel polygon overrun of the wheel set cause snake instability and high frequency vibration and even lead to wheel damage, which directly endangers the safety and reliability of trains. Therefore, it is very important to grasp the full-size status of the wheel set timely and accurately for the safe running of rail transit trains. The tread wear, equivalent conicity and wheel polygon of the wheel set can be obtained through computer calculation by accurately obtaining the tread profile, inner distance, diameter and tread bouncing of the two wheels of the wheel set. The existing measurement methods are mainly as follows. First, the wheel sets are measured one by one by manually operating several hand-held measuring instruments or small mobile measuring equipment, and the measured values are input into the computer for calculation to obtain the results. However, the manual operation of hand-held measuring instruments or small mobile measuring equipment is time-consuming and inefficient, is greatly affected by human operation factors, and has insufficient measurement stability. The to-be-measured train needs to stop for a long time, resulting in the reduction of train utilization rate and poor economy. Second, the wheel sets are measured with the measuring device of the under floor wheel lathe when the train is subjected to the wheel lathing work, and the results are obtained through the computer calculation of the under floor wheel lathe itself. However, the method of measuring the wheel sets with the measuring device of the under floor wheel lathe requires the whole measuring process to be carried out during the wheel lathing of the train. Such a method is time-consuming and inefficient, such that the on-line pass-through non-stop detection cannot be realized, and the full coverage detection of a large number of trains cannot be carried out in a short time. Third, dynamic measurement and qualitative judgment are carried out by using the dynamic detection system for the outline dimension of the trackside wheel and the online polygon detection system. However, the method for dynamic measurement using the dynamic detection system for the outline dimension of the trackside wheel and the online polygon detection system has low measurement accuracy and large error. The measurement accuracy of the equivalent conicity of the wheel set cannot meet the relevant requirements. The wheel polygon can only be detected qualitatively, and the accurate amplitude of wheel polygon cannot be measured accurately. Therefore, how to provide an online high-precision measuring device and method for full-size parameters of a wheel set of a rail transit vehicle, which is convenient and efficient, has high degree of automation and measurement accuracy, has functions of measuring the equivalent conicity and wheel polygon of the wheel set, and can achieve non-stop measurement has become an urgent problem to be solved by those skilled in the art. Therefore, the present disclosure provides a novel online high-precision measuring device and method for full-size parameters of a wheel set of a rail transit vehicle, which can effectively solve the above problems. Prior art documents are known, such as CN 113 120 031 A, which discloses an online measuring device that includes laser sensors arranged on two sides to detect conicity of trains wheels; EP 1 614 602 B1, which discloses a device for measuring condition data of a rolling wheelset and includes contactless distance sensors to determine wheel flange height and the profile of the wheel; US 2019/367058 A1, which discloses a train wheel measurement system that includes optical sensors to detect a profile of a wheel for forming a three-dimensional image of the wheel; DE 87 13 297 U1, which discloses a device for recording condition data of a rolling wheel set by having a measuring section composed of a spring, a shock absorber, and a displacement sensor contacting a rolling wheel through a touch rail; and KR 100 628 350 B1, which discloses a scan-type wheel measuring device, including a wheel radial direction measuring means including a wheel radial rod in contact with an outer peripheral surface of a wheel to d