Laser target mirror clamping device and rail vehicle body deflection measurement system and method

Abstract

The application discloses a laser target mirror clamping device, a rail vehicle body deflection measuring system and a method, and the clamping device comprises a clamping positioning frame, one end of the clamping positioning frame is provided with a positioning part, and the abutting surface of the positioning part is a smooth structure; the clamping positioning frame is provided with an abutting part; a laser target mirror receiver is arranged on the clamping positioning frame and is used for receiving a laser signal emitted by a laser tracker and feeding back the value of the horizontal height of the laser target mirror receiver. The system further comprises a data processor and a laser tracker, the horizontal height value fed back by the laser target mirror receiver is transmitted to the data processor for calculation, and finally the deflection size is obtained. Compared with the prior art, the application has the beneficial effects that the measurement task of the vehicle body deflection can be efficiently completed, the application has the advantages of high precision, intelligence, flexible operation, high efficiency, unlimited application scene, and truly realizes the rapid routine inspection before the vehicle travels.

Description

Technical Field

[0001] This invention belongs to the field of rail vehicle body deflection measurement, specifically relating to a laser target mirror clamping device and a rail vehicle body deflection measurement system and method. Background Technology

[0002] Car body deflection is a crucial parameter directly related to the load-bearing capacity, operational performance, and safety of rail vehicles. When negative deflection occurs in the car body, the underframe steel structure is under tension, with the stress direction downwards, the same as the load on the electrical equipment, significantly reducing the car body's load-bearing capacity. Over prolonged operation, the negative deflection will further intensify, increasing the risk to the safe operation of undercarriage equipment and affecting the performance of door opening and closing, thus increasing the door failure rate.

[0003] During vehicle assembly and manufacturing, an upper deflection is typically pre-set to ensure the vehicle remains horizontal under vertical loads. This facilitates stress distribution on the vehicle body, normal operation of equipment such as side doors, and keeps the vehicle within clearance limits. Regularly measuring the deflection status and monitoring trends after the vehicle enters operation is also a highly effective preventative monitoring method.

[0004] Existing methods for measuring vehicle body deflection mainly include theodolite measurement, connecting tube measurement, and laser rangefinder measurement. Among them, theodolite measurement has high accuracy, but the debugging and measurement time is long, the operation is relatively inconvenient, and the efficiency is low; connecting tube measurement is cumbersome to set up and has low measurement accuracy; laser rangefinder measurement has high accuracy, but its application scenarios are relatively limited. It generally requires moving the vehicle and fixing the sensor position, and has high requirements for the flatness of the reference surface. It is mostly suitable for measuring the change in vehicle body deflection in the laboratory.

[0005] For example, Chinese invention patent 2021109047291 discloses a measurement system for a rail vehicle body assembly, wherein... Figure 1 Claims 5 and 6 disclose the use of laser rangefinders installed under the vehicle body to detect the deflection of the vehicle body. However, the application scenarios of this solution are very limited. The sensor position is fixed, and the measurement can only be carried out when the vehicle is moved to the sensor installation location. However, moving the vehicle will cause great inconvenience in terms of time and location, and the setup cost is also high. It cannot achieve rapid measurement anytime and anywhere, forming a routine check before each vehicle departs. Summary of the Invention

[0006] Details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects and advantages of the present application more readily apparent.

[0007] This invention provides a laser target mirror clamping device and a rail vehicle body deflection measurement system and method, which can efficiently complete the task of measuring the body deflection. It has the advantages of high precision, intelligence, flexible operation, high efficiency and no limitation on application scenarios, and truly realizes rapid routine inspection before vehicle operation.

[0008] This invention discloses a laser target mirror clamping device, comprising:

[0009] A clamping and positioning frame; one end of the clamping and positioning frame is provided with a positioning part for abutting against the bottom surface of the side beam of the rail vehicle body, and the abutting surface of the positioning part is a smooth structure; the clamping and positioning frame is provided with an abutting part for abutting against the side surface of the side beam of the rail vehicle body.

[0010] A laser target mirror receiver, mounted on the clamping and positioning frame, is used to receive laser signals emitted by the laser tracker and to provide feedback on the magnitude of the laser target mirror receiver at horizontal height.

[0011] In some embodiments, the abutment portion is a pulley: the pulley is movably mounted on the clamping and positioning frame via an adjusting rod.

[0012] In some implementations, it also includes:

[0013] A sliding groove is formed above the hollow structure inside the clamping and positioning frame;

[0014] A sliding plate is located at the lower end of the adjusting rod and is fitted into the inner hollow structure, and the adjusting rod is fitted into the sliding groove;

[0015] A locking device is provided between the clamping and positioning frame and the sliding plate to achieve locking and positioning of the two.

[0016] In some embodiments, the locking device includes:

[0017] A locking hole is located on the sliding plate within the range of the slide groove;

[0018] A locking bolt, threadedly connected, is provided on the locking hole, and the outer end of the locking bolt can abut against the clamping and positioning frame.

[0019] In some implementations, it also includes:

[0020] A connecting sleeve is located at the other end of the clamping and positioning frame and is rotatably connected to the laser target mirror column located above the laser target mirror receiver;

[0021] A laser target receiver locking device is provided between the connecting sleeve and the laser target column to achieve locking and positioning of the two.

[0022] In some embodiments, the laser target receiver locking device includes:

[0023] A limiting hole is provided on the side wall of the connecting sleeve;

[0024] A locking bolt, threadedly connected, is provided on the limiting hole, and the outer end of the locking bolt can abut against the laser target column.

[0025] The present invention also discloses a rail vehicle body deflection measurement system, including a laser target mirror clamping device, a data processor, and a laser tracker as described in any of the above embodiments; the laser tracker is disposed on one side of the rail vehicle body whose deflection is to be measured, and emits a laser signal to the laser target mirror receiver, and transmits the horizontal height value fed back by the laser target mirror receiver to the data processor for calculation.

[0026] In some implementations, it also includes:

[0027] A wireless transmission interface is provided on the data processor and the laser tracker to enable wireless signal transmission between the two.

[0028] The present invention also discloses a method for measuring the deflection of a rail vehicle body, including the body deflection measurement system as described in the above embodiments;

[0029] The measurement method is as follows:

[0030] The laser tracker is placed on the side of the rail vehicle body whose deflection is to be measured, and a global coordinate system is established;

[0031] Select detection points Z at the front and rear ends of one side of the rail vehicle body where the deflection to be measured. 11 and Z 13 Detection point Z is set at the same position at the front and rear ends on the other side of the rail vehicle body whose deflection is to be measured. 21 and Z 23 The detection point at the center of both sides is Z. 12 and Z 22 ;

[0032] The laser target clamping device is placed at the aforementioned detection point, and the horizontal height at the detection point is measured using a laser tracker, which is H. Z11 H Z12 H Z13 H Z21 H Z22 H Z23 ;

[0033] The horizontal height values ​​at the above detection points are transmitted to the data processor, and the deflection results are obtained through measurements by the following company:

[0034] The deflection on one side of the rail vehicle body is: f1 = H Z12 -(H Z11 +H Z13 ) / 2;

[0035] The deflection on the other side of the rail vehicle body is: f2 = H Z22 -(H Z21 +H Z23 ) / 2.

[0036] In some implementations, the detection points at both the front and rear ends are selected at the center of the bolster beam of the vehicle body chassis.

[0037] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0038] 1. Accurate positioning. The designed laser target mirror clamping device can accurately position the deflection measurement point. The abutment part keeps the depth of the measuring device consistent in the lateral entry of the vehicle body, eliminating the influence of the side beam tilt. At the same time, it can avoid the interference of the air spring at the bolster beam measurement point, thus ensuring the reliability of the deflection measurement results.

[0039] 2. High measurement accuracy. The laser tracker uses a laser beam in conjunction with a laser target mirror receiver to achieve a measurement accuracy of one-thousandth of a millimeter, which fully meets the requirements for vehicle deflection measurement.

[0040] 3. Easy to operate and simple to set up. The measurement process only requires placing the laser target receiver at different deflection measurement points. After completing the deflection measurement of a group of vehicles, the laser tracker can be easily moved to the vicinity of the next group of vehicles for measurement, making it extremely efficient.

[0041] 4. Not limited by site conditions and applicable to multiple scenarios. The measurement system utilizes the global coordinate system established by the laser tracker itself, which is not affected by external factors such as site flatness and vehicle relative position. It can efficiently complete the vehicle body deflection measurement task in various scenarios, including rail vehicle production, assembly, and even after operation.

[0042] 5. High degree of intelligence. The measuring device and data processor transmit data through a wireless transmission interface, giving the equipment a high degree of freedom. After acquiring the coordinates of the measuring points, it can automatically output the vehicle body deflection value according to the set calculation method. Attached Figure Description

[0043] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0044] Figure 1 This is a three-dimensional structural diagram of the laser target mirror clamping device of the present invention.

[0045] Figure 2 This is a three-dimensional structural diagram of the clamping and positioning frame of the present invention.

[0046] Figure 3 This is a three-dimensional structural diagram of the adjusting rod of the present invention.

[0047] Figure 4 This is a three-dimensional structural diagram of the groove of the present invention.

[0048] Figure 5 This is a schematic diagram illustrating the structure of the laser target mirror clamping device of the present invention between the bottom surface of the vehicle body side beam and the side surface of the vehicle body side beam.

[0049] Figure 6 This is a schematic diagram of the measurement system of the present invention.

[0050] Figure 7 This is a schematic diagram of the deflection measurement structure of the present invention.

[0051] Figure descriptions: 1. Clamping and positioning frame; 2. Positioning part; 3. Adjusting rod; 4. Abutment part; 5. Laser target mirror receiver; 6. Slide groove; 7. Sliding plate; 8. Locking hole; 9. Locking bolt; 10. Connecting sleeve; 11. Limiting hole; 12. Laser target mirror column; 13. Card slot; 14. Bottom surface of vehicle side beam; 15. Side surface of vehicle side beam; 16. Data processor; 17. Laser tracker; 18. Wireless transmission interface. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments provided by this invention without inventive effort are within the scope of protection of this invention.

[0053] Obviously, the accompanying drawings described below are merely some examples or embodiments of the present invention. Those skilled in the art can apply the present invention to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this invention, modifications to design, manufacturing, or production based on the technical content disclosed in this invention are merely conventional technical means and should not be construed as insufficient disclosure of the present invention.

[0054] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention may be combined with other embodiments without conflict.

[0055] This invention discloses a laser target mirror clamping device, comprising: a clamping and positioning frame 1 and a laser target mirror receiver 5; one end of the clamping and positioning frame 1 is provided with a positioning part 2 for abutting against the bottom surface 14 of the side beam of a rail vehicle body, and the abutting surface of the positioning part 2 is a smooth structure; the clamping and positioning frame 1 is provided with an abutting part 4 for abutting against the side surface 15 of the side beam of the rail vehicle body; the laser target mirror receiver 5 is disposed on the clamping and positioning frame 1 for receiving the laser signal emitted by the laser tracker 17 and feeding back the value of the laser target mirror receiver 5 in the horizontal height.

[0056] like Figure 1 and Figure 5 As shown, the contact surface between the positioning part 2 and the bottom surface 14 of the vehicle body side beam has a smooth structure to ensure a tight fit between the two, completing the clamping device in the Z direction ( Figure 5 Positioning of the clamping device on the X-direction, with the abutment part 4 contacting the side of the vehicle body beam 15, thereby completing the clamping device's positioning in the X-direction. Figure 5 Positioning on the vehicle body side beam. The reason for the above structural design is that the bottom surface 14 of the vehicle body side beam has a certain degree of inclination. In order to avoid the measurement influence caused by the inclination of the bottom surface 14 of the vehicle body side beam, the above structural design can ensure that the X-direction entry depth is consistent when it contacts the bottom surface 14 of the vehicle body side beam, eliminate the interference of the inclination factor, and thus ensure the reliability of the deflection measurement results.

[0057] The device is in direct contact with the vehicle body being tested, and its structural design ensures the reliability of the deflection results obtained by the measurement system. This is a key guarantee for the subsequent implementation of the scheme of using a laser tracker to measure the vehicle body deflection.

[0058] In some embodiments, the abutment part 4 is a pulley: the pulley is movably mounted on the clamping and positioning frame 1 via an adjusting rod 3. Specifically, the pulley is rotatably mounted on the outer end of the adjusting rod 3 via a slot 13. Preferably, the adjusting rod 3 has an L-shaped structure, with one side of its L-shape parallel to the clamping and positioning frame 1 and the other side perpendicular to the clamping and positioning frame 1. The purpose of making it movable is to adapt to different types of rail vehicles, ensuring that both the abutment part 4 and the positioning part 2 can remain in contact with the vehicle body.

[0059] In some embodiments, the device further includes: a slide groove 6, a sliding plate 7, and a locking device; the slide groove 6 is located above the hollow structure inside the clamping and positioning frame 1; the sliding plate 7 is located at the lower end of the adjusting rod 3 and is engaged in the hollow structure, and the adjusting rod 3 is engaged in the slide groove 6; the locking device is located between the clamping and positioning frame 1 and the sliding plate 7 to achieve locking and positioning of the two. The above configuration discloses a specific movable method and structure for the adjusting rod 3, ensuring the stability of the adjusting rod 3 during movement, thereby guaranteeing the accuracy of the detection.

[0060] In some embodiments, the locking device includes a locking hole 8 and a locking bolt 9; the locking hole 8 is located on the sliding plate 7 within the range of the slide groove 6; the locking bolt 9 is threadedly connected to the locking hole 8, and the outer end of the locking bolt 9 can abut against the clamping positioning frame 1. The specific arrangement of the locking hole 8 and the locking bolt 9 discloses a position locking method for the adjusting rod 3. After the position of the adjusting rod 3 is initially adjusted to ensure that its abutment part 4 and positioning part 2 can maintain contact with the vehicle body, it is then locked to ensure that the abutment part 4 enters the bottom surface 14 of the vehicle body side beam at a consistent depth when measured at different positions subsequently.

[0061] In some embodiments, the device further includes: a connecting sleeve 10 and a laser target receiver locking device; the connecting sleeve 10 is located at the other end of the clamping and positioning frame 1 and is rotatably connected to the laser target column 12 located above the laser target receiver 5; the laser target receiver locking device is located between the connecting sleeve 10 and the laser target column 12 for locking and positioning the two. The laser target receiver locking device includes: a limiting hole 11 and a locking bolt; the limiting hole 11 is opened in the side wall of the connecting sleeve 10; the locking bolt is threadedly connected to the limiting hole 11, and the outer end of the locking bolt can abut against the laser target column 12.

[0062] The rotating structure ensures that the laser target receiver 5 at different positions of the laser tracker 17 can receive signals. It is important to note that the rotation angle adjustment is performed before measurement. First, ensure that each set detection point can receive signals from the laser tracker 17, and then lock and position it.

[0063] A rail vehicle body deflection measurement system includes a laser target mirror clamping device as described in any of the above embodiments, a data processor 16, a laser tracker 17, and a wireless transmission interface 18. The laser tracker 17 is disposed on one side of the rail vehicle body whose deflection is to be measured, and emits a laser signal to the laser target mirror receiver 5, and transmits the horizontal height value fed back by the laser target mirror receiver 5 to the data processor 16 for calculation. The wireless transmission interface 18 is disposed on the data processor 16 and the laser tracker 17 to realize wireless signal transmission between the two.

[0064] Specific examples Figure 6 As shown, this is a rail vehicle body deflection measurement system. Utilizing a laser target clamping device, a data processor 16, a laser tracker 17, and wireless transmission capabilities, this measurement system achieves high efficiency and intelligent measurement of rail vehicle body deflection.

[0065] A method for measuring the deflection of a rail vehicle body includes the aforementioned body deflection measurement system. The measurement method comprises: placing the laser tracker 17 on the side of the rail vehicle body whose deflection is to be measured, and establishing a global coordinate system; selecting detection points Z at the front and rear ends of one side of the rail vehicle body whose deflection is to be measured. 11 and Z 13 Detection point Z is set at the same position at the front and rear ends on the other side of the rail vehicle body whose deflection is to be measured. 21 and Z 23 The detection point at the center of both sides is Z. 12 and Z 22 The laser target clamping device is placed at the aforementioned detection point, and the horizontal height at the detection point is measured using the laser tracker 17, which is H. Z11 H Z12 H Z13 H Z21 H Z22 H Z23 The horizontal height values ​​at the above detection points are transmitted to the data processor 16, and the deflection results are obtained through the following company measurements:

[0066] The deflection on one side of the rail vehicle body is: f1 = H Z12 -(H Z11 +H Z13 ) / 2;

[0067] The deflection on the other side of the rail vehicle body is: f2 = H Z22 -(H Z21 +H Z23 ) / 2.

[0068] Preferably, the detection points at both the front and rear ends are selected at the center of the bolster beam of the vehicle body chassis. Detecting the points at the bolster beam effectively avoids interference from the air spring, thus ensuring the reliability of the deflection measurement results.

[0069] Its working principle is as follows:

[0070] Adjust the specific position of the adjusting rod 3 and the angle position of the laser target receiver 5 and fix them. When the system is working, place the laser tracker 17 on one side of the rail vehicle body and establish a global coordinate system (unaffected by the flatness of the site), setting the vertical direction Z of the coordinate system to the vertical direction; place the laser target clamping device at the deflection measurement point of the rail vehicle body, and use the laser target receiver 5 to receive the laser beam emitted by the laser tracker 17. The laser tracker 17 can automatically adjust its direction to continuously track the position of the laser target receiver 5 and record its coordinate value in the global coordinate system; the laser target receiver 5 can then obtain its vertical direction (Z direction) coordinates and transmit them to the data processor 16 in real time through the wireless transmission interface 18; after placing and measuring all deflection measurement points, the data processor 16 will automatically calculate and output the deflection value of the vehicle body based on the received coordinate values.

[0071] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A measurement method for a rail vehicle body deflection measurement system, characterized in that, The measurement system includes: a laser target mirror clamping device, a data processor, and a laser tracker; The laser target mirror clamping device includes a clamping and positioning frame and a laser target mirror receiver; one end of the clamping and positioning frame is provided with a positioning part for abutting against the bottom surface of the side beam of the rail vehicle body, and the abutting surface of the positioning part is a smooth structure; the clamping and positioning frame is provided with an abutting part for abutting against the side of the side beam of the rail vehicle body; the laser target mirror receiver is disposed on the clamping and positioning frame for receiving the laser signal emitted by the laser tracker and feeding back the value of the laser target mirror receiver in the horizontal height; The laser tracker is positioned on one side of the rail vehicle body whose deflection is to be measured, and emits a laser signal to the laser target mirror receiver, and transmits the horizontal height value fed back by the laser target mirror receiver to the data processor for calculation; The measurement method of the measurement system is as follows: Place the laser tracker on the side of the rail vehicle body whose deflection is to be measured, and establish a global coordinate system; Select detection points Z11 and Z13 at the front and rear ends of one side of the rail vehicle body whose deflection is to be measured, and set detection points Z21 and Z23 at the same position at the front and rear ends of the other side of the rail vehicle body whose deflection is to be measured. The detection points at the center of both sides are Z12 and Z22. The laser target clamping device is placed at the above detection points, and the horizontal height values ​​at the above detection points are measured by the laser tracker, which are HZ11, HZ12, HZ13, HZ21, HZ22, and HZ23 respectively. The horizontal height values ​​at the above detection points are transmitted to the data processor, and the deflection magnitude is calculated using the following formula: The deflection on one side of the rail vehicle body is: f1 = HZ12 - (HZ11 + HZ13) / 2; The deflection on the other side of the rail vehicle body is: f2 = HZ22 - (HZ21 + HZ23) / 2.

2. The measurement method according to claim 1, characterized in that, The abutment part is a pulley: the pulley is movably mounted on the clamping and positioning frame via an adjusting rod.

3. The measurement method according to claim 2, characterized in that, Also includes: A sliding groove is formed above the hollow structure inside the clamping and positioning frame; A sliding plate is located at the lower end of the adjusting rod and is fitted into the inner hollow structure, and the adjusting rod is fitted into the sliding groove; A locking device is provided between the clamping and positioning frame and the sliding plate to achieve locking and positioning of the two.

4. The measurement method according to claim 3, characterized in that, The locking device includes: A locking hole is located on the sliding plate within the range of the slide groove; A locking bolt, threadedly connected, is provided on the locking hole, and the outer end of the locking bolt can abut against the clamping and positioning frame.

5. The measurement method according to claim 3, characterized in that, Also includes: A connecting sleeve is located at the other end of the clamping and positioning frame and is rotatably connected to the laser target mirror column located above the laser target mirror receiver; A laser target receiver locking device is provided between the connecting sleeve and the laser target column to achieve locking and positioning of the two.

6. The measurement method according to claim 5, characterized in that, The laser target receiver locking device includes: A limiting hole is provided on the side wall of the connecting sleeve; A locking bolt, threadedly connected, is provided on the limiting hole, and the outer end of the locking bolt can abut against the laser target column.

7. The measurement method according to claim 1, characterized in that, Also includes: A wireless transmission interface is provided on the data processor and the laser tracker to enable wireless signal transmission between the two.

8. The measurement method according to claim 1, characterized in that: The detection points at both the front and rear ends are located at the center of the bolster beam of the vehicle body underframe.

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