A lidar device for measuring train speed

Abstract

This utility model discloses a lidar device for measuring train speed, including a column, a crossbar, and a speedometer. The crossbar includes a main rod, and the speedometer is mounted below the main rod via a connecting mechanism. A guide groove is formed along the length of the lower part of the main rod. An angle control mechanism for controlling the rotation angle of the speedometer is installed on one side of the connecting mechanism, and a locking mechanism for locking the speedometer after it rotates is installed on the other side. This utility model is applicable to train speed measurement. In this device, the speedometer is mounted below the main rod via the connecting mechanism, and the guide seat in the connecting mechanism is slidably installed in the guide groove. Therefore, the position of the speedometer can be adjusted by sliding, which facilitates control of the distance to the train and avoids situations where the distance is too close to the train and is affected by crosswinds, or where the distance is too far and the speed measurement is inaccurate. Furthermore, the device has high stability after installation.

Description

Technical Field

[0001] This utility model relates to the field of speed measuring device technology, and in particular to a lidar device for measuring train speed. Background Technology

[0002] With the rapid development of railway transportation, accurate train speed measurement has become increasingly important. Traditional speed measurement methods, such as electromagnetic and photoelectric speed measurement, while effective to some extent, have limitations, especially on high-speed trains. LiDAR, as an emerging speed measurement technology, is gradually being applied to train speed measurement due to its advantages such as high precision and strong anti-interference capabilities.

[0003] Laser radar devices are usually installed on the side of train tracks to calculate train speed by emitting laser beams and receiving the reflected signals. Due to its non-contact measurement characteristics, this method can provide high-precision real-time speed data and is not affected by the distance and contact state between the train and the speed measuring device. However, in practical applications, strong crosswinds are formed around the train when it runs at high speed. This factor affects the stability and measurement accuracy of the laser radar speed measuring device, which directly leads to the following problems when measuring speed: (1) Signal interference: Crosswinds cause the surrounding air to flow, which in turn affects the propagation path of the laser beam, resulting in unstable reflection of the laser signal. The measurement results of lidar may fluctuate, affecting the accuracy of speed measurement. (2) Reduced measurement stability: If the lidar device is affected by crosswinds, the alignment angle of the device may change slightly, thereby affecting the emission direction and receiving capability of the laser beam, reducing the measurement stability of the device, and causing an increase in error. (3) Increased maintenance and adjustment frequency: Due to the instability caused by crosswinds, the device may need more frequent maintenance and recalibration to ensure that it continuously provides accurate data. This increases operating costs and manpower input. When the existing speed measuring device is installed, the position and angle of the speed measuring device need to be adjusted. The base of the speed measuring device is basically movable and adjustable, which will lead to insufficient overall stability of the speed measuring device, resulting in inaccurate measurement data. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing speed measuring devices, which require adjustments to the position and angle of the speed measuring device during installation. Since the base of the speed measuring device is generally movable and adjustable, this leads to insufficient overall stability of the speed measuring device and inaccurate measurement data. This invention provides a lidar device for measuring train speed. In this device, the speed measuring instrument is installed below the main rod via a connecting mechanism, and the guide seat in the connecting mechanism is slidably installed in the guide groove. Therefore, the position of the speed measuring instrument can be adjusted by sliding, facilitating control of the distance to the train. This avoids situations where the distance is too close to the train, causing interference from crosswinds, or too far from the train, leading to inaccurate speed measurements. Furthermore, the device exhibits high stability after installation.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model discloses a lidar device for measuring train speed, which is set on the side of the train's direction of travel. It includes a column, a crossbar installed on the top of the column, and a speed measuring instrument suspended below the crossbar for measuring train speed. The crossbar includes a main rod, and the speed measuring instrument is installed below the main rod through a connecting mechanism. A guide groove is provided below the main rod along its length.

[0007] The connecting mechanism includes a guide seat slidably installed inside the guide groove and a rotating shaft rotatably installed below the guide seat. The connecting mechanism can slide along the length direction inside the guide seat. One side of the connecting mechanism is equipped with an angle control mechanism for controlling the rotation angle adjustment of the speed measuring instrument, and the other side is equipped with a locking mechanism for locking the speed measuring instrument after it rotates.

[0008] As a further description of the above technical solution: a semi-fastening plate is provided at the bottom of the guide seat, and wing plates are installed on both sides of the semi-fastening plate. The locking mechanism includes an electric push rod, an upper toothed plate, and a lower toothed plate. The electric push rod is fixedly installed on one of the wing plates, the lower toothed plate is installed on the top of the speedometer, and the upper toothed plate is located above the lower toothed plate. The piston rod of the electric push rod is connected to the upper toothed plate, so that the electric push rod can push the upper toothed plate to move vertically. When the upper toothed plate moves upward, it can separate from the lower toothed plate, so that the speedometer can adjust the angle under the control of the angle control mechanism. When the upper toothed plate moves downward, it can engage with the lower toothed plate, so that the position of the speedometer is locked.

[0009] As a further description of the above technical solution: both the upper and lower toothed plates adopt an arc-shaped structure, the teeth on the upper and lower toothed plates are distributed in an arc shape, and the center of the upper and lower toothed plates coincides with the axis of the rotating shaft, so that the teeth on the upper and lower toothed plates can correspond when the speed measuring instrument rotates.

[0010] As a further description of the above technical solution: the angle control mechanism includes a control motor, a drive gear, and a driven gear. The control motor is mounted on another wing plate, the drive gear is mounted on the output shaft of the control motor, and the driven gear is sleeved on the rotating shaft. The drive gear and the driven gear are meshed together. Based on this, when the control motor is running, the meshing action of the drive gear and the driven gear drives the rotating shaft to rotate, thereby driving the speedometer mounted below the rotating shaft to rotate and adjust the angle.

[0011] As a further description of the above technical solution: a lead screw is installed along the length of the inner wall of the guide groove, and a lead screw nut adapted to the lead screw is embedded in the guide seat. The lead screw and the lead screw nut are sleeved together. An installation cavity is opened at one end of the guide groove in the main rod. A motor is installed in the installation cavity. The output shaft of the motor is connected to one end of the lead screw. Based on this, when the motor runs, it can drive the lead screw to rotate. Under the action of the lead screw nut, the guide seat slides along the direction of the guide groove, thereby realizing the position adjustment of the speed measuring instrument. A cover plate is provided on the top of the installation cavity.

[0012] As a further description of the above technical solution: one end of the guide groove extends to one end of the main rod to form an open end. An end cap is fixedly inserted into the open end of the guide groove by bolts. A bushing is provided on the inner side of the end cap. One end of the lead screw is inserted into the bushing. On the one hand, it can play a role in assisting the support of the lead screw. On the other hand, it allows the guide seat to be moved out from the open end of the guide groove after the end cap is removed, which is convenient for replacement or maintenance.

[0013] As a further description of the above technical solution: the crossbar is detachably assembled on the column, and the crossbar also includes a connecting sleeve, which is disposed at one end of the main bar and is sleeved and installed on the top of the column from top to bottom.

[0014] As a further description of the above technical solution: a triangular rib is welded below the connection between the connecting sleeve and the main rod to increase the strength of the crossbar.

[0015] As a further description of the above technical solution: the inner side of the connecting sleeve is provided with multiple insert plates along the vertical direction, and the top outer side of the column is provided with multiple slots that correspond one-to-one with the insert plates. The insert plates are inserted into the slots one-to-one, so that the main rod is more stable after installation. The top of the column is provided with a decorative plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In this device, the speed measuring instrument is installed below the main rod through a connecting mechanism, and the guide seat in the connecting mechanism is slidably installed in the guide groove. Therefore, the position of the speed measuring instrument can be adjusted by sliding, which makes it easy to control the distance from the train and avoid the situation where the distance from the train is too close and interfered by the crosswind when the train is moving, or the distance from the train is too far and the speed measurement is inaccurate.

[0018] The device has an angle control mechanism installed on one side of the connecting mechanism and a locking mechanism installed on the other side. The angle control mechanism can control and adjust the angle of the speed measuring instrument to ensure accurate speed measurement, while the locking mechanism can help lock the speed measuring instrument after the angle is adjusted. This can greatly improve the stability of the speed measuring instrument, further reduce the interference from crosswinds when trains pass, and improve the stability of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is an exploded view of the present invention;

[0021] Figure 3 This is a schematic diagram of the crossbar structure in this utility model;

[0022] Figure 4 This is a schematic diagram of the connecting mechanism in this utility model. Figure 1 ;

[0023] Figure 5 This is a schematic diagram of the connecting mechanism in this utility model. Figure 2 .

[0024] Reference numerals: 1. Column; 10. Slot; 11. Decorative panel; 2. Crossbar; 20. Main rod; 200. Mounting cavity; 201. Cover plate; 202. Motor; 203. End cover; 204. Guide groove; 205. Lead screw; 21. Connecting sleeve; 210. Insert plate; 22. Rib plate; 3. Connecting mechanism; 30. Guide seat; 300. Lead screw nut; 31. Half buckle plate; 32. Wing plate; 33. Rotating shaft; 4. Speedometer; 5. Angle control mechanism; 50. Control motor; 51. Driving gear; 52. Driven gear; 6. Locking mechanism; 60. Electric push rod; 61. Upper gear plate; 62. Lower gear plate. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5This invention further illustrates a specific embodiment of a lidar device for measuring train speed. It overcomes the shortcomings of existing speed measuring devices, where the base is typically adjustable due to the need for position and angle adjustments during installation, leading to insufficient overall stability and inaccurate measurement data. In this device, the speedometer is mounted below the main rod via a connecting mechanism, and the guide seat in the connecting mechanism is slidably installed in the guide groove. Therefore, the position of the speedometer can be adjusted by sliding, facilitating control of the distance to the train and avoiding interference from crosswinds due to excessive proximity or inaccurate speed measurements due to excessive distance. Furthermore, the device exhibits high stability after installation. This invention, a lidar device for measuring train speed, is not limited to the embodiments described below.

[0026] Example 1:

[0027] This embodiment provides a lidar device for measuring train speed, such as... Figures 1-5 As shown, the device is located on the side of the train traveling in the direction of travel. It includes a column 1, a crossbar 2 installed on the top of the column 1, and a speed measuring instrument 4 suspended and installed below the crossbar 2 for measuring the train speed. The crossbar 2 includes a main rod 20. The speed measuring instrument 4 is installed below the main rod 20 through a connecting mechanism 3. A guide groove 204 is provided below the main rod 20 along the length direction.

[0028] The connecting mechanism 3 includes a guide seat 30 that is slidably installed inside the guide groove 204 and a rotating shaft 33 that is rotatably installed below the guide seat 30. The connecting mechanism 3 can slide along the length direction within the guide seat 30. An angle control mechanism 5 for controlling the rotation angle of the speed measuring instrument 4 is installed on one side of the connecting mechanism 3, and a locking mechanism 6 for locking the speed measuring instrument 4 after it rotates is installed on the other side. It should be noted that the speed measuring instrument 4 is a laser radar speed measuring instrument.

[0029] Working principle: This device is set on the side of the train's direction of travel, with the speed measuring instrument 4 corresponding to the train's direction. The speed measuring instrument 4 collects the train's speed data. In this device, the speed measuring instrument 4 is installed below the main rod 20 through the connecting mechanism 3. The guide seat 30 in the connecting mechanism 3 is slidably installed in the guide groove 204. Therefore, the position of the speed measuring instrument 4 can be adjusted by sliding, which facilitates the control of the distance from the train and avoids the situation where the distance is too close to the train and is affected by crosswinds when the train is traveling, or the distance is too far and the speed measurement is inaccurate. In addition, a locking mechanism 6 is installed on one side of the connecting mechanism 3. The locking mechanism 6 can help lock the speed measuring instrument 4 after the angle is adjusted. This can greatly improve the stability of the speed measuring instrument 4, further reduce the interference from crosswinds when the train passes, and improve the stability of the equipment.

[0030] Specifically, such as Figures 4-5As shown, in order to lock the speedometer 4, in this embodiment, a half-locking plate 31 is provided at the bottom of the guide seat 30, and wing plates 32 are installed on both sides of the half-locking plate 31. The locking mechanism 6 includes an electric push rod 60, an upper toothed plate 61, and a lower toothed plate 62. The electric push rod 60 is fixedly installed on one of the wing plates 32, the lower toothed plate 62 is installed on the top of the speedometer 4, and the upper toothed plate 61 is located above the lower toothed plate 62. The piston rod of the electric push rod 60 is connected to the upper toothed plate 61, so that the electric push rod 60 can push the upper toothed plate 61 to move in the vertical direction. When the upper toothed plate 61 moves upward, it can separate from the lower toothed plate 62, so that the speedometer 4 can adjust its angle under the control of the angle control mechanism 5. When the upper toothed plate 61 moves downward, it can engage with the lower toothed plate 62, so that the position of the speedometer 4 is locked.

[0031] Specifically, such as Figures 4-5 As shown, in order to further lock the speed measuring instrument 4, in this embodiment, both the upper tooth plate 61 and the lower tooth plate 62 adopt an arc-shaped structure. The tooth structure on the upper tooth plate 61 and the lower tooth plate 62 is distributed in an arc shape, and the center of the upper tooth plate 61 and the lower tooth plate 62 coincides with the axis of the rotating shaft 33, so that the tooth structure on the upper tooth plate 61 and the lower tooth plate 62 can correspond when the speed measuring instrument 4 rotates.

[0032] Specifically, such as Figures 4-5 As shown, in order to control the angle of the speed measuring instrument 4, in this embodiment, the angle control mechanism 5 includes a control motor 50, a drive gear 51, and a driven gear 52. The control motor 50 is mounted on another wing plate 32, the drive gear 51 is mounted on the output shaft of the control motor 50, and the driven gear 52 is sleeved on the rotating shaft 33. The drive gear 51 and the driven gear 52 are meshed and connected. Based on this, when the control motor 50 is running, the meshing action of the drive gear 51 and the driven gear 52 drives the rotating shaft 33 to rotate, thereby driving the speed measuring instrument 4 mounted below the rotating shaft 33 to rotate and adjust the angle.

[0033] Specifically, such as Figures 2-4 As shown, in order to adjust the position of the speed measuring instrument 4, in this embodiment, a lead screw 205 is installed along the length of the inner wall of the guide groove 204, and a lead screw nut 300 adapted to the lead screw 205 is embedded in the guide seat 30. The lead screw 205 and the lead screw nut 300 are sleeved together. An installation cavity 200 is opened at one end of the guide groove 204 in the main rod 20. A motor 202 is installed in the installation cavity 200. The output shaft of the motor 202 is connected to one end of the lead screw 205. Based on this, when the motor 202 runs, it can drive the lead screw 205 to rotate. Under the action of the lead screw nut 300, the guide seat 30 slides along the direction of the guide groove 204, thereby realizing the position adjustment of the speed measuring instrument 4. A cover plate 201 is provided on the top of the installation cavity 200.

[0034] Specifically, such as Figures 1-2As shown, in order to facilitate the installation and disassembly of the speed measuring instrument 4, and thus facilitate its replacement or maintenance, in this embodiment, one end of the guide groove 204 extends to one end of the main rod 20, forming an open end. An end cap 203 is fixedly inserted into the open end of the guide groove 204 by bolts. A bushing is provided on the inner side of the end cap 203, and one end of the lead screw 205 is inserted into the bushing. On the one hand, it can play a role in supporting the lead screw 205, and on the other hand, it allows the guide seat 30 to be moved out from the open end of the guide groove 204 after the end cap 203 is removed, which is convenient for replacement or maintenance.

[0035] Specifically, such as Figures 1-2 As shown, in order to facilitate the transportation of the column 1 and the crossbar 2, in this embodiment, the crossbar 2 is detachably assembled on the column 1. The crossbar 2 also includes a connecting sleeve 21, which is disposed at one end of the main rod 20 and is sleeved and installed on the top of the column 1 from top to bottom.

[0036] Specifically, such as Figures 1-2 As shown, in order to improve the strength of the crossbar 2, in this embodiment, a triangular rib plate 22 is welded below the connection between the connecting sleeve 21 and the main rod 20 to increase the strength of the crossbar 2.

[0037] Specifically, such as Figures 1-2 As shown, in order to improve the stability of the main rod 20 after installation, in this embodiment, multiple insert plates 210 are provided on the inner side of the connecting sleeve 21 along the vertical direction, and multiple slots 10 corresponding to the insert plates 210 are provided on the outer side of the top of the column 1 along the vertical direction. The insert plates 210 are inserted into the slots 10 one by one, so that the stability of the main rod 20 after installation is higher. A decorative plate 11 is provided on the top of the column 1.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A lidar device for measuring train speed, disposed on the side of the train in the direction of travel, comprising a column (1), a crossbar (2) mounted on the top of the column (1), and a speed measuring instrument (4) suspended below the crossbar (2) for measuring train speed, characterized in that: The crossbar (2) includes a main rod (20), and the speed measuring instrument (4) is installed below the main rod (20) through a connecting mechanism (3). A guide groove (204) is provided below the main rod (20) along the length direction. The connecting mechanism (3) includes a guide seat (30) slidably installed inside the guide groove (204) and a rotating shaft (33) rotatably installed below the guide seat (30). The connecting mechanism (3) can slide along the length direction inside the guide seat (30). An angle control mechanism (5) for controlling the rotation angle of the speed measuring instrument (4) is installed on one side of the connecting mechanism (3), and a locking mechanism (6) for locking the speed measuring instrument (4) after it rotates is installed on the other side.

2. The lidar device for measuring train speed according to claim 1, characterized in that: The bottom of the guide seat (30) is provided with a half-fastening plate (31), and wing plates (32) are installed on both sides of the half-fastening plate (31). The locking mechanism (6) includes an electric push rod (60), an upper toothed plate (61) and a lower toothed plate (62). The electric push rod (60) is fixedly installed on one of the wing plates (32). The lower toothed plate (62) is installed on the top of the speed measuring instrument (4). The upper toothed plate (61) is located above the lower toothed plate (62). The piston rod of the electric push rod (60) is connected to the upper toothed plate (61), so that the electric push rod (60) can push the upper toothed plate (61) to move in the vertical direction.

3. A lidar device for measuring train speed according to claim 2, characterized in that: Both the upper toothed plate (61) and the lower toothed plate (62) adopt an arc-shaped structure. The teeth on the upper toothed plate (61) and the lower toothed plate (62) are distributed in an arc shape, and the center of the upper toothed plate (61) and the lower toothed plate (62) coincides with the axis of the rotating shaft (33).

4. A lidar device for measuring train speed according to claim 2, characterized in that: The angle control mechanism (5) includes a control motor (50), a drive gear (51), and a driven gear (52). The control motor (50) is mounted on another wing plate (32), the drive gear (51) is mounted on the output shaft of the control motor (50), and the driven gear (52) is sleeved on the rotating shaft (33). The drive gear (51) and the driven gear (52) are meshed together.

5. A lidar device for measuring train speed according to claim 1, characterized in that: A lead screw (205) is installed along the length of the inner wall of the guide groove (204). A lead screw nut (300) adapted to the lead screw (205) is embedded in the guide seat (30). The lead screw (205) is sleeved with the lead screw nut (300). An installation cavity (200) is opened at one end of the guide groove (204) in the main rod (20). A motor (202) is installed in the installation cavity (200). The output shaft of the motor (202) is connected to one end of the lead screw (205).

6. A lidar device for measuring train speed according to claim 5, characterized in that: One end of the guide groove (204) extends to one end of the main rod (20) to form an open end. An end cap (203) is fixedly inserted into the open end of the guide groove (204) by bolts. A bushing is provided on the inner side of the end cap (203), and one end of the lead screw (205) is inserted into the bushing.

7. A lidar device for measuring train speed according to claim 1, characterized in that: The crossbar (2) is detachably mounted on the column (1). The crossbar (2) also includes a connecting sleeve (21). The connecting sleeve (21) is located at one end of the main bar (20) and is mounted on the top of the column (1) from top to bottom.

8. A lidar device for measuring train speed according to claim 7, characterized in that: A triangular rib plate (22) is welded below the connection between the connecting sleeve (21) and the main rod (20).

9. A lidar device for measuring train speed according to claim 7, characterized in that: The inner side of the connecting sleeve (21) is provided with a plurality of insert plates (210) in the vertical direction. The top outer side of the column (1) is provided with a plurality of slots (10) that correspond one-to-one with the insert plates (210). The insert plates (210) are inserted into the slots (10) one-to-one.

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