Railway wagon overrun detection device

Abstract

The utility model discloses a railway wagon overrun detection device which comprises a road-crossing truss and a rail, the center line of the road-crossing truss corresponds to the center line of the rail, the left side and the right side of the road-crossing truss and the left side and the right side of the top end of the road-crossing truss are respectively provided with a laser irradiation device, and the bottom end of the rail is provided with a magnetic steel sensor. The laser irradiation equipment comprises a base, a protective shell is rotationally installed at the top end of the base, a window is formed in the outer wall of an inner cavity of the protective shell, and a laser sensor is installed in the inner cavity of the protective shell. According to the rail wagon overrun detection device, in actual use, the aiming angle and the view field requirement of the laser sensor can be adaptively adjusted according to the actual requirement, the actual use requirement of a detection site is met, dust on the outer wall of the laser sensor can be cleaned, and the dust is prevented from affecting the detection precision of the laser sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of laser detection devices, in particular to an over-limit detection device for railway freight cars. Background Art

[0002] High-speed railway freight cars need to be quickly inspected to determine whether they are overloaded. Using the cross-road truss as a carrier, high-frequency laser sensors with different illumination directions installed on the truss are used to quickly and multi-angle laser irradiate the train passing under the truss, and radar array data fusion technology is used to generate a three-dimensional point cloud model of the train with spatial coordinate information. After obtaining the three-dimensional model, the end face profile of the train is overlapped with the limit diagram through the limit diagram nesting technology, and then automatically identified through the algorithm, and then the over-limit situation of the train is determined, and the position and coordinates of the over-limit point are marked to achieve rapid detection, improve the digital level of safe production in freight stations, and improve operating efficiency.

[0003] At present, the side detection equipment used is a fixed scanning angle of the laser sensor after installation, and the aiming angle cannot be adjusted according to demand. Due to the large height of the cross-road truss and the high risk factor of on-site operation, it is very inconvenient to manually adjust the installation angle. In addition, the existing equipment cannot adjust the size of the laser sensor scanning field of view according to demand. Based on the above problems, a railway freight car overload detection device is proposed. Utility Model Content

[0004] The utility model aims to provide a railway freight car overload detection device to solve the problem in the background technology mentioned above that the laser sensor in the current side detection equipment is fixed in scanning angle after installation and the aiming angle cannot be adjusted according to demand.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a railway freight car overload detection device, comprising: a cross-road truss, a rail, a laser irradiation device and a magnetic steel sensor, the center line of the cross-road truss corresponds to the center line of the rail, wherein a plurality of the laser irradiation devices are installed on the cross-road truss, the bottom end of the rail is installed with the magnetic steel sensor, the laser irradiation device comprises: a base, a protective shell, a window, a laser sensor and a baffle, a protective shell is rotatably installed on the top end of the base, a window is opened on the outer wall of the protective shell, a laser sensor is installed in the inner cavity of the protective shell, and a baffle for changing the open space of the window is slidably installed on the front side of the inner wall of the protective shell, and the baffle can be moved laterally by adjusting the drive of the driving unit.

[0006] Preferably, the road span truss comprises: two supporting parts perpendicular to the ground and a connecting part connected to the top ends of the two supporting parts, laser irradiation equipment is respectively installed on the two supporting parts, and two laser irradiation equipment are symmetrically installed on the connecting part.

[0007] Preferably, the adjustment drive unit includes: a mounting block, a lead screw and a second motor, the number of the mounting blocks is two, which are symmetrically arranged on the inner wall of the protective shell, and a first moving block is installed at the bottom end of the outer wall of the baffle, the first moving block is threadedly connected to the lead screw, the lead screw is rotatably installed between the two mounting blocks, and one end of the lead screw passes through the mounting block and is connected to the output end of the second motor.

[0008] Preferably, two slideways are provided on the protective shell, and the baffle is slidably connected to the two slideways.

[0009] Preferably, a first motor is installed in the inner cavity of the base, and an output end of the first motor is installed on the protective shell through a coupling.

[0010] Preferably, a turntable is rotatably installed at the top of the inner cavity of the protective shell, four extension rods are equidistantly arranged on the circumference of the outer wall of the turntable, a connecting rod is installed at the end of the extension rod away from the turntable, a cleaning strip is installed on the outer wall of the connecting rod on the side opposite to the laser sensor, and the cleaning strip fits the outer wall of the laser sensor, wherein the turntable is driven by the cleaning drive unit to reciprocate and the cleaning strip is moved back and forth on the outer wall of the laser sensor.

[0011] Preferably, the cleaning drive unit includes: an outer shell, a reciprocating screw, a third motor, a second moving block, a rack and a gear, the outer shell is installed on the top of the protective shell, one end of the reciprocating screw is rotatably installed on the inner wall of the outer shell, the third motor is installed in the inner cavity of the outer shell, and the output end of the third motor is connected to the other end of the reciprocating screw, the second moving block is screwed on the outer wall of the reciprocating screw, the inner cavity of the outer shell is also rotatably installed with a gear, and the bottom end of the gear is fixedly connected to the outer wall of the turntable, and a rack is provided on the side of the second moving block opposite to the gear, and the rack and the gear are meshed with each other.

[0012] Preferably, the reciprocating distance of the second moving block is greater than or equal to one quarter of the arc length of the gear.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the railway freight car overload detection device drives the protective shell to rotate by the first motor, thereby changing the direction of the window, and then changing the scanning direction of the laser sensor; by moving the baffle, the size of the open space of the window can be adjusted, and then the size of the field of view of the laser sensor can be adjusted; by rotating the turntable, the extension rod and the connecting rod are rotated, and the dust on the outer wall of the laser sensor is cleaned by the cleaning strip; in actual use, the aiming angle and field of view requirements of the laser sensor can be adaptively adjusted according to actual needs to meet the actual use needs of the detection site; the dust on the outer wall of the laser sensor can also be cleaned to prevent the dust from affecting the detection accuracy of the laser sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the first motor of the utility model.

[0016] Figure 3 It is a schematic diagram of the rear structure of the baffle of the utility model.

[0017] Figure 4 It is a structural schematic diagram of the shell of the utility model.

[0018] Figure 5 It is a structural schematic diagram of the connecting rod of the utility model.

[0019] Figure 6 It is a top view of the reciprocating screw of the utility model.

[0020] Figure 7 It is a structural schematic diagram of the utility model of the road span truss.

[0021] In the figure: 1. base, 2. protective shell, 3. window, 4. laser sensor, 5. first motor, 6. baffle, 7. slide, 8. first moving block, 9. mounting block, 10. screw, 11. second motor, 12. turntable, 13. extension rod, 14. connecting rod, 14a, cleaning bar, 15. housing, 16. reciprocating screw, 17. third motor, 18. second moving block, 18a, rack, 19. gear, 20. cross-road truss, 20a, support part, 20b, connecting part, 21. rail, 22. magnetic steel sensor, 100, laser irradiation equipment, 200, adjustment drive part, 300, cleaning drive part. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-7 The utility model provides a technical solution for a railway freight car overload detection device.

[0024] Embodiment 1:

[0025] like Figure 7 As shown, a railway detection device includes: a span truss 20 and a rail 21. The span truss 20 is installed on the ground, and the outer wall of the frame of the span truss 20 and the ground together enclose a detection space. The railway train can travel through the detection space through the rail 21. The center line of the span truss 20 corresponds to the center line of the rail 21. The span truss 20 includes: two supporting parts 20a perpendicular to the ground and a connecting part 20b connected to the top of the two supporting parts. Laser irradiation devices 100 are respectively installed on the two supporting parts 20a. Two laser irradiation devices 100 are symmetrically installed on the connecting part 20b. Each laser irradiation device 100 faces the inside of the detection space. Four laser irradiation devices 100 form a laser curtain wall to perform three-dimensional irradiation on the train under the span truss. A magnetic steel sensor 22 is installed at the bottom end of the rail 21. When the train passes by the magnetic steel sensor 22, the magnetic steel sensor 22 generates a trigger signal for controlling and triggering the four The laser irradiation devices 100 start working at the same time, continuously irradiating and scanning the left and right tops and two sides of the train; when the last train leaves, the magnetic steel sensor controls the four laser sensors to stop working, completing the process of collecting three-dimensional information of the train. Among them, the magnetic steel sensor is a device based on magnetic steel and sensing technology, which is used to measure the strength, direction or change of the magnetic field. A Hall effect sensor can be used. The Hall effect refers to a conductive material. When the current flows perpendicular to the direction of the magnetic field, a voltage difference Hall voltage is generated on both sides of the material. The metal parts of the train, such as wheels and body, will change the surrounding magnetic field distribution when passing through the magnetic steel sensor, thereby generating a model. The magnetic steel sensor 22 and the laser irradiation device 100 in this solution can be controlled by a PLC controller, so that when the train passes the magnetic steel sensor 22, the laser irradiation device 100 is started for scanning. In addition, the magnetic steel sensor 22 can also be used to measure the vehicle speed, etc.

[0026] The laser irradiation device 100 is described below. Figure 1-Figure 3A laser irradiation device 100 includes: a base 1, a protective shell 2, a window 3, a laser sensor 4 and a baffle 6. The top of the base 1 is rotatably mounted with the protective shell 2, the outer wall of the inner cavity of the protective shell 2 is provided with a window 3, and the inner cavity of the protective shell 2 is mounted with a laser sensor 4. The laser sensor 4 is an existing device and is a sensor capable of scanning the surrounding environment in all directions. The sensor calculates the distance by emitting lasers and receiving reflected light, and combines multiple laser arrays to achieve all-round scanning. In this solution, a multi-beam method that can meet the needs is selected to achieve 360-degree all-round The laser beam emitted by the laser sensor 4 is transmitted outward through the window 3 to form a laser curtain wall of a certain range. By using the devices at multiple different positions to cooperate with each other, a laser curtain wall covering the entire cross-section of the railway freight car can be formed to meet the scanning requirements. The inner cavity of the base 1 is equipped with a first motor 5. The output end of the first motor 5 is installed at the bottom end of the outer wall of the protective shell 2 through a coupling. The first motor 5 can drive the protective shell 2 to rotate. The first motor 5 uses a motor with a lockable output end. The protective shell 2 is driven to control the rotation angle of ±40 degrees, thereby changing the visual The direction of the window 3 can be adjusted to meet the scanning requirements at different angles. The front side of the inner wall of the protective shell 2 is slidably equipped with a baffle 6 for changing the open space of the window 3. The area of ​​the baffle 6 is adapted to the window 3 and is made of a material that the laser cannot penetrate. The baffle 6 can be moved laterally by adjusting the drive of the driving unit 200. Two slideways 7 are symmetrically installed in the upper and lower directions of the front side of the inner wall of the protective shell 2. The upper and lower ends of the outer wall of the baffle 6 are respectively slidably embedded in the inner cavities of the two slideways 7. The slideways 7 are used to limit the baffle 6 to ensure that the baffle 6 can slide stably and be placed and detached. The area of ​​the window 3 through which the laser can pass can be changed, thereby changing the area of ​​the laser sensor 4 emitting laser light to the external environment and changing the size of its scanning field of view. In actual use, if the sunlight is strong and the field of view is too large, sunlight interference is likely to occur. By using this solution, while meeting the scanning requirements, the field of view can be reduced to effectively reduce sunlight interference. In addition, when no detection is required and in bad weather, the baffle 6 can be completely closed to protect the outer wall of the laser sensor 4, wherein the sliding range of the baffle 6 is between 1 and 50 mm, and the effective field of view after shielding is between 10 and 60 degrees.

[0027] In the above scheme, the adjustment drive unit 200 includes: two symmetrically installed mounting blocks 9, the two mounting blocks 9 are symmetrically arranged on the inner wall of the protective shell 2, and the bottom end of the outer wall of the baffle 6 is installed with a first moving block 8, the first moving block 8 is threadedly connected to the lead screw 10, when the lead screw 10 rotates, it can drive the first moving block 8 to move, thereby driving the baffle 6 to move, wherein the lead screw 10 is rotatably installed between the two mounting blocks 9, and one end of the lead screw 10 passes through the mounting block 9 and is connected to the output end of the second motor 11, the second motor 11 is an existing device, and can drive the lead screw 10 to rotate after being turned on.

[0028] In this solution, in order to ensure that the baffle 6 does not shake or flip when sliding, the following solution is proposed: two slideways 7 are provided on the protective shell 2, and the baffle 6 is slidably connected to the two slideways 7, and the slideways 7 are used to limit the baffle 6 to ensure its stability when sliding.

[0029] Embodiment 2:

[0030] In actual use, the scanning work may easily cause the outer wall of the laser sensor 4 to be adhered to dust, and the dust coverage may cause the accuracy of the laser sensor 4 to decrease. In order to solve this problem, this embodiment is proposed, mainly referring to Figure 1-Figure 6 , the difference between this embodiment and the first embodiment is that: it also includes: a turntable 12, the turntable 12 is rotatably mounted on the top of the inner cavity of the protective shell 2, four extension rods 13 are equidistantly arranged on the circumference of the outer wall of the turntable 12, a connecting rod 14 is installed at the end of the extension rod 13 away from the turntable 12, a cleaning bar 14a is installed on the outer wall of the connecting rod 14 on the side opposite to the laser sensor 4, and the cleaning bar 14a fits the outer wall of the laser sensor 4, the cleaning bar 14a can be a flexible material such as a sponge, a brush, an electrostatic dust removal brush, etc., which can avoid scratching the outer wall of the laser sensor 4 while cleaning the dust, wherein the turntable 12 is driven by the cleaning drive unit 300 to reciprocate, and at the same time, the cleaning bar 14a is reciprocated on the outer wall of the laser sensor 4, and the reciprocating movement of the cleaning bar 14a can better clean the dust on the outer wall of the laser sensor 4, and avoid the bristles rotating in the same direction leaving dust marks;

[0031] The cleaning drive unit 300 includes: a shell 15, a reciprocating screw 16, a third motor 17, a second moving block 18 and a gear 19. The shell 15 is installed at the top of the protective shell 2. One end of the reciprocating screw 16 is rotatably installed on the inner wall of the shell 15. The inner cavity of the shell 15 is installed with the third motor 17, and the output end of the third motor 17 is connected to the other end of the reciprocating screw 16. Turning on the third motor 17 can drive the reciprocating screw 16 to rotate. The outer wall of the reciprocating screw 16 is screwed with the second moving block 18, wherein the outer wall of the reciprocating screw 16 is provided with an external thread, and the inner wall of the second moving block 18 is provided with an internal thread adapted to the external thread. When the reciprocating screw 16 rotates, the second moving block 18 can reciprocate. In addition, the upper and lower ends of the outer wall of the second moving block 18 are respectively connected to the inner wall of the shell 15. The two ends of the cavity are fitted together, and the inner wall of the shell 15 is used to limit the second moving block 18 to prevent self-rotation. The inner cavity of the shell 15 is also rotatably installed with a gear 19, and the bottom end of the outer wall of the gear 19 is fixedly connected to the outer wall of the turntable 12. A rack 18a is provided on the opposite side of the second moving block 18 and the gear 19, and the rack 18a and the gear 19 are meshed with each other. When the second moving block 18 moves back and forth, it can drive the gear 19 to rotate back and forth, thereby causing the turntable 12 to rotate together. The reciprocating distance of the second moving block 18 is greater than or equal to one-quarter of the arc length of the gear 19, ensuring that the forward and reverse rotation angles of the gear 19 and the turntable 12 are greater than or equal to 90 degrees, and ensuring that the total area covered by the four cleaning strips 14a is greater than or equal to the circumferential outer wall of the laser sensor 4 to avoid leaving cleaning dead corners.

[0032] In this scheme, the specific working principle of cleaning the outer wall of the laser sensor 4 is as follows: turn on the third motor 17 to drive the reciprocating screw 16 to rotate, thereby driving the second movable block 18 to move back and forth, and utilizing the meshing transmission of the rack 18a on the outer wall of the second movable block 18 to drive the gear 19 to rotate in the forward and reverse directions, thereby driving the turntable 12, the extension rod 13 and the connecting rod 14 to reciprocate on the outer wall of the laser sensor 4, and utilizing the cleaning strip 14a to clean the dust on the outer wall of the laser sensor 4 to prevent the dust from affecting the accuracy of the laser sensor 4.

[0033] In the above scheme, when bending to clean the outer wall of the laser sensor 4, it should be ensured that the static position of any connecting rod 14 does not correspond to the position of the window 3, so as to avoid blocking the laser of this part from being released to the outside through the window 3 and avoiding the scanning field of view from being blocked.

[0034] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "center position", "other end", "upper", "one side", "top", "inside", "front", "center", "two ends" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation; at the same time, unless otherwise clearly specified and limited, the terms "snapping", "plugging", "welding", "installation", "setting", "interference fit", "screw connection", "pin connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A railway freight car overload detection device, comprising: A span truss (20), a rail (21), a laser irradiation device (100) and a magnetic steel sensor (22), wherein the center line of the span truss (20) corresponds to the center line of the rail (21), wherein a plurality of the laser irradiation devices (100) are mounted on the span truss (20), and the magnetic steel sensor (22) is mounted at the bottom end of the rail (21), characterized in that the laser irradiation device (100) comprises: a base (1), a protective shell (2), a window (3), a laser sensor (4) and a baffle (6), wherein the top end of the base (1) is rotatably mounted with a protective shell (2), an outer wall of the protective shell (2) is provided with a window (3), an inner cavity of the protective shell (2) is provided with a laser sensor (4), and a baffle (6) for changing the open space of the window (3) is slidably mounted on the front side of the inner wall of the protective shell (2), and the baffle (6) can be moved laterally by the drive of an adjustment drive unit (200).

2. A railway freight car overrun detection device according to claim 1, characterized in that: The road span truss (20) comprises: two support parts (20a) perpendicular to the ground and a connection part (20b) connected to the top ends of the two support parts, the two support parts (20a) are respectively mounted with laser irradiation devices (100), and the connection part (20b) is symmetrically mounted with two laser irradiation devices (100).

3. A railway freight car overrun detection device according to claim 2, characterized in that: The adjustment drive unit (200) comprises: a mounting block (9), a lead screw (10) and a second motor (11); the mounting blocks (9) are two in number and are symmetrically arranged on the inner wall of the protective shell (2); a first moving block (8) is installed at the bottom end of the outer wall of the baffle (6); the first moving block (8) is threadedly connected to the lead screw (10); the lead screw (10) is rotatably installed between the two mounting blocks (9), and one end of the lead screw (10) passes through the mounting block (9) and is connected to the output end of the second motor (11).

4. A railway freight car overrun detection device according to claim 3, characterized in that: Two slideways (7) are provided on the protective shell (2), and the baffle (6) is slidably connected to the two slideways (7).

5. A railway freight car overrun detection device according to claim 4, characterized in that: A first motor (5) is installed in the inner cavity of the base (1), and an output end of the first motor (5) is installed on the protective shell (2) via a coupling.

6. A railway freight car overrun detection device according to any one of claims 1 to 5, characterized in that: A turntable (12) is rotatably mounted on the top of the inner cavity of the protective shell (2); four extension rods (13) are equidistantly arranged on the circumference of the outer wall of the turntable (12); a connecting rod (14) is mounted on one end of the extension rod (13) away from the turntable (12); a cleaning bar (14a) is mounted on the outer wall of the connecting rod (14) on the side opposite to the laser sensor (4), and the cleaning bar (14a) is in contact with the outer wall of the laser sensor (4); wherein the turntable (12) is driven by the cleaning drive unit (300) to reciprocate, and the cleaning bar (14a) is simultaneously moved reciprocally on the outer wall of the laser sensor (4).

7. A railway freight car overrun detection device according to claim 6, characterized in that: The cleaning drive unit (300) comprises: a housing (15), a reciprocating screw (16), a third motor (17), a second moving block (18), a rack (18a) and a gear (19); the housing (15) is mounted on the top of the protective shell (2); one end of the reciprocating screw (16) is rotatably mounted on the inner wall of the housing (15); the third motor (17) is mounted in the inner cavity of the housing (15); the output end of the third motor (17) is connected to the other end of the reciprocating screw (16); the second moving block (18) is screwed on the outer wall of the reciprocating screw (16); the gear (19) is also rotatably mounted in the inner cavity of the housing (15); the bottom end of the gear (19) is fixedly connected to the outer wall of the turntable (12); a rack (18a) is provided on the side of the second moving block (18) opposite to the gear (19); and the rack (18a) and the gear (19) are meshed with each other.

8. The railway freight car overrun detection device according to claim 7, characterized in that: The reciprocating distance of the second moving block (18) is greater than or equal to one quarter of the arc length of the gear (19).

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