Multi-point switching speed measuring device based on radio waves

Abstract

The invention discloses a multi-point switching speed measurement device based on radio waves, and particularly relates to the technical field of speed measurement. The multi-point switching speed measurement device is provided with a driving wheel main body, a first transmission wheel, a belt, a second transmission wheel, a reciprocating screw rod, a threaded cap, a movable extrusion frame, a first sliding sleeve, a second sliding sleeve, a first sliding rod, a second sliding rod, a guide hole and a cleaning brush; when a driving wheel body rotates, a first transmission wheel is controlled to drive a belt and a second transmission wheel to rotate, the second transmission wheel controls a reciprocating lead screw to rotate, the reciprocating lead screw drives a threaded cap and a movable extrusion frame to move downwards, the movable extrusion frame extrudes a second sliding sleeve to move downwards while moving downwards, and at the moment, the second sliding sleeve is limited by a guide hole to move downwards; the arc-shaped surface of the handrail body is wiped and cleaned by the cleaning brush, the situation that sundries adhered to the handrail body hinder movement of the driving wheel body is avoided, the process that the speed measuring instrument body reciprocates to adjust the position is smoothly and stably carried out, and energy consumption is low.

Description

Technical Field

[0001] The present invention relates to the technical field of speed measurement, and more specifically, the present invention relates to a multi-point switching speed measurement device based on radio waves. Background Art

[0002] When using radio waves to measure the speed of vehicles on the road, in order to ensure speed measurement of vehicles at multiple relatively flexible positions, a speed measurement device is often set to be movable outside the road guardrail. There are often situations where sundries fly and there is a lot of dust near the road. The sundries or dust adhering to the guardrail will add unnecessary obstacles and loads to the movement of the speed measurement device. At the same time, after long-term use, some sundries will adhere to the surface of the speed measurement device, which may affect the transmission or reception accuracy of radio waves. Therefore, a multi-point switching speed measurement device based on radio waves is needed. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a multi-point switching speed measurement device based on radio waves. The technical problem to be solved by the present invention is: the sundries and dust adhered to the surface of the road guardrail will affect the smooth movement of the speed measurement device, and at the same time, the sundries adhered to the surface of the speed measurement device will affect the transmission or reception of radio waves.

[0004] To achieve the above object, the present invention provides the following technical solution: A multi-point switching speed measurement device based on radio waves, including a railing main body, a moving bracket is slidably arranged outside the railing main body, a guiding frame is connected inside the moving bracket, a guiding rod is slidably arranged inside the guiding frame, the guiding rod is connected to the railing main body, a fixing block is connected inside the moving bracket, a supporting frame is connected to one side of the fixing block, a driving wheel main body is penetrated and rotatably arranged on the supporting frame, a transmission device is connected to the driving wheel main body, a moving wiping device is arranged on the transmission device, the moving wiping device is connected inside the moving bracket, the moving wiping device is lapped outside the railing main body, a first bevel gear is connected under the driving wheel main body, a swinging cleaning device connected to the lower part of the supporting frame is engaged under the first bevel gear, and a rolling support device is connected to the side of the swinging cleaning device close to the railing main body, and the rolling support device is connected outside the railing main body.

[0005] As a further solution of the present invention: The transmission device includes a first transmission wheel, the first transmission wheel is connected to the driving wheel main body, a belt is lapped outside the first transmission wheel, a second transmission wheel is sleeved inside the belt, and the second transmission wheel is clamped outside the moving wiping device.

[0006] As a further solution of the present invention: The mobile wiping device includes a vertical plate, the vertical plate is connected inside a mobile bracket, a guiding hole is opened on one side of the vertical plate, two elastic support devices are connected to the side of the vertical plate close to the support frame, and a sliding cleaning device is clamped outside the elastic support device.

[0007] As a further solution of the present invention: The sliding cleaning device slides in the guiding hole, a mobile control device is lapped outside the sliding cleaning device, the mobile control device is connected outside the vertical plate, and the mobile control device is arranged on a transmission device.

[0008] As a further solution of the present invention: The elastic support device includes a first support plate, the first support plate is connected outside the vertical plate, a first sliding rod is connected to the first support plate, a first sliding sleeve is sleeved outside the first sliding rod, the first sliding sleeve is clamped on the sliding cleaning device, an elastic component is sleeved outside the first sliding rod, the bottom end of the elastic component is connected to the first support plate, and the elastic component is connected under the first sliding sleeve.

[0009] As a further solution of the present invention: The sliding cleaning device includes a second sliding rod, the second sliding rod is clamped outside the first sliding sleeve, a second sliding sleeve is sleeved outside the second sliding rod, an extension rod is connected to the side of the second sliding sleeve away from the driving wheel body, the other end of the extension rod is connected to a cleaning brush, the extension rod slides in the guiding hole, the cleaning brush is lapped outside the railing body, the second sliding sleeve is lapped with the mobile control device, and the second sliding rod is rectangular.

[0010] As a further solution of the present invention: The mobile control device includes a reciprocating lead screw, the reciprocating lead screw is clamped on the transmission device, a threaded nut is arranged outside the reciprocating lead screw, a mobile extrusion frame is connected to the side of the threaded nut close to the second sliding rod, the mobile extrusion frame is lapped outside the second sliding sleeve, a first bearing is sleeved outside the reciprocating lead screw, and the first bearing is clamped on a second support plate, and the second support plate is connected outside the vertical plate.

[0011] As a further solution of the present invention: The swing cleaning device includes a fixing plate, the fixing plate is connected under the support frame, a second bearing is penetrated and clamped on one side of the fixing plate, a connecting shaft is sleeved inside the second bearing, and a second bevel gear is connected to the end of the connecting shaft close to the railing body.

[0012] As a further solution of the present invention: The second bevel gear meshes with the first bevel gear, a circular plate is connected to the other end of the connecting shaft, a coil spring is sleeved outside the connecting shaft, one end of the coil spring is connected to the second bearing, the other end of the coil spring is connected to the circular plate, a swing cleaning rod is connected to the other side of the circular plate, and the position of the swing cleaning rod corresponds to the position of the speedometer body.

[0013] As a further solution of the present invention: The rolling support device includes a cross bar, the cross bar is connected to the swing cleaning device, the other end of the cross bar is connected with a spherical shell, a ball is sleeved in the spherical shell, and the ball is lapped outside the railing main body.

[0014] The beneficial effects of the present invention are as follows: In the present invention, by setting a driving wheel main body, a first transmission wheel, a belt, a second transmission wheel, a reciprocating lead screw, a threaded nut, a moving extrusion frame, a first sliding sleeve, a second sliding sleeve, a first sliding rod, a second sliding rod, a guiding hole and a cleaning brush, when the driving wheel main body rotates, it will control the first transmission wheel to drive the belt and the second transmission wheel to rotate. The second transmission wheel controls the reciprocating lead screw to rotate, and the reciprocating lead screw drives the threaded nut and the moving extrusion frame to move downward. While the moving extrusion frame moves downward, it squeezes the second sliding sleeve to move downward. At this time, the second sliding sleeve is limited by the guiding hole to move downward, so that the cleaning brush wipes and cleans the arc surface of the railing main body, avoiding the adhesion of sundries on the railing main body from hindering the movement of the driving wheel main body, enabling the speed measuring instrument main body to move back and forth to adjust the position smoothly and stably, and with lower energy consumption; In the present invention, by setting a first bevel gear, a second bevel gear, a connecting shaft, a circular plate, a coil spring and a swing cleaning rod, when the first bevel gear is controlled to rotate by the driving wheel main body and the first bevel gear meshes with the second bevel gear, the second bevel gear drives the connecting shaft and the circular plate to rotate. At this time, the circular plate drives the swing cleaning rod to swing to wipe and clean the surface of the speed measuring instrument main body. When the first bevel gear and the second bevel gear are disengaged, the coil spring drives the second bevel gear and the circular plate to reset, ensuring the cleanliness of one side of the speed measuring instrument main body, avoiding the influence of adhered sundries on the radio wave transmission process, and ensuring the accuracy of the speed measurement process to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a three-dimensional structural schematic diagram of the moving bracket of the present invention; Figure 3 is a three-dimensional structural schematic diagram of the bottom view of the moving bracket of the present invention; Figure 4 is a three-dimensional structural schematic diagram of the transmission device of the present invention; Figure 5 is a three-dimensional structural schematic diagram of the rolling support device of the present invention; Figure 6 is a partial three-dimensional structural schematic diagram of the swing cleaning device of the present invention; Figure 7 is a three-dimensional structural schematic diagram of the moving wiping device of the present invention; Figure 8 is a three-dimensional structural schematic diagram of the elastic support device of the present invention; In the figure: 1, railing main body; 2, moving bracket; 3, speedometer main body; 4, guide rod; 5, guide frame; 6, fixing block; 7, support frame; 8, driving wheel main body; 9, transmission device; 91, first transmission wheel; 92, belt; 93, second transmission wheel; 10, moving wiping device; 101, vertical plate; 102, guide hole; 103, elastic support device; 1031, first support plate; 1032, first sliding rod; 1033, first sliding sleeve; 1034, elastic component; 104, sliding cleaning device; 1041, second sliding rod; 1042, second sliding sleeve; 1043, extension rod; 1044, cleaning brush; 105, moving control device; 1051, reciprocating lead screw; 1052, threaded nut; 1053, moving extrusion frame; 1054, first bearing; 1055, second support plate; 11, first bevel gear; 12, swinging cleaning device; 121, fixing plate; 122, second bearing; 123, connecting shaft; 124, second bevel gear; 125, circular plate; 126, coil spring; 127, swinging cleaning rod; 13, rolling support device; 131, cross bar; 132, spherical shell; 133, ball. Detailed implementation manner

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0017] Embodiment 1, as Figure 1-4 and Figure 7-8 shown, the present invention provides a multi-point position switching speed measurement device based on radio waves, including a railing main body 1. A moving bracket 2 is slidably arranged outside the railing main body 1. A guide frame 5 is connected inside the moving bracket 2. A guide rod 4 is slidably arranged inside the guide frame 5. The guide rod 4 is connected to the railing main body 1. By setting the guide rod 4 and the guide frame 5, and the guide rod 4 is in the shape of a dovetail, it plays a connecting role between the moving bracket 2 and the railing main body 1, ensuring the smooth and stable movement process of the moving bracket 2; A fixing block 6 is connected inside the moving bracket 2. One side of the fixing block 6 is connected with a support frame 7. A driving wheel main body 8 is penetrated and rotatably arranged on the support frame 7. By setting the driving wheel main body 8 and the support frame 7, when the driving wheel main body 8 rotates, the friction between the driving wheel main body 8 and the railing main body 1 is used to control the horizontal movement of the support frame 7 and the moving bracket 2, facilitating the adjustment of the position of the speedometer main body 3; A transmission device 9 is connected to the driving wheel main body 8. A moving wiping device 10 is provided on the transmission device 9. The moving wiping device 10 is connected within the moving bracket 2. The moving wiping device 10 overlaps on the railing main body 1. A first bevel gear 11 is connected below the driving wheel main body 8. A swinging cleaning device 12 connected to the lower part of the support frame 7 is engaged below the first bevel gear 11. A rolling support device 13 is connected to one side of the swinging cleaning device 12 close to the railing main body 1. The rolling support device 13 is connected to the outside of the railing main body 1.

[0018] The transmission device 9 includes a first transmission wheel 91. The first transmission wheel 91 is connected to the driving wheel main body 8. A belt 92 overlaps outside the first transmission wheel 91. A second transmission wheel 93 is sleeved within the belt 92. The second transmission wheel 93 is clamped outside the moving wiping device 10. By providing the first transmission wheel 91, the belt 92 and the second transmission wheel 93, the first transmission wheel 91 can transmit the power of the driving wheel main body 8 to the moving wiping device 10 through the belt 92.

[0019] The moving wiping device 10 includes a vertical plate 101. The vertical plate 101 is connected within the moving bracket 2. A guiding hole 102 is opened on one side of the vertical plate 101. Two elastic support devices 103 are connected to the side of the vertical plate 101 close to the support frame 7. A sliding cleaning device 104 is clamped outside the elastic support devices 103.

[0020] The sliding cleaning device 104 is slidably arranged within the guiding hole 102. A moving control device 105 overlaps outside the sliding cleaning device 104. The moving control device 105 is connected outside the vertical plate 101. The moving control device 105 is arranged on the transmission device 9.

[0021] The elastic support device 103 includes a first support plate 1031. The first support plate 1031 is connected outside the vertical plate 101. A first sliding rod 1032 is connected to the first support plate 1031. A first sliding sleeve 1033 is sleeved outside the first sliding rod 1032. The first sliding sleeve 1033 is clamped on the sliding cleaning device 104. An elastic component 1034 is sleeved outside the first sliding rod 1032. The bottom end of the elastic component 1034 is connected to the first support plate 1031. The elastic component 1034 is connected below the first sliding sleeve 1033. By providing the first sliding rod 1032 and the first sliding sleeve 1033, the first sliding rod 1032 plays a guiding and limiting role on the first sliding sleeve 1033, ensuring the smooth and stable movement of the first sliding sleeve 1033 and the sliding cleaning device 104 in the vertical direction. By providing the elastic component 1034, when the moving control device 105 does not cause extrusion to the sliding cleaning device 104, the elastic force of itself can be used to control the upward reset of the first sliding sleeve 1033 and the sliding cleaning device 104.

[0022] The sliding cleaning device 104 includes a second sliding rod 1041. The second sliding rod 1041 is clamped outside the first sliding sleeve 1033. A second sliding sleeve 1042 is sleeved outside the second sliding rod 1041. One side of the second sliding sleeve 1042 away from the driving wheel body 8 is connected with an extension rod 1043. The other end of the extension rod 1043 is connected with a cleaning brush 1044. The extension rod 1043 is slidably arranged in the guiding hole 102. The cleaning brush 1044 is lapped on the railing body 1. The second sliding sleeve 1042 is lapped with the movement control device 105. The second sliding rod 1041 is rectangular. By setting the second sliding rod 1041 and the second sliding sleeve 1042, the second sliding rod 1041 guides and positions the second sliding sleeve 1042, ensuring that when the second sliding sleeve 1042 is externally squeezed, it can move horizontally along the second sliding rod 1041. By setting the extension rod 1043, the guiding hole 102 squeezes the second sliding sleeve 1042 through the extension rod 1043, facilitating the horizontal movement while the second sliding sleeve 1042 is under vertical pressure. By setting the cleaning brush 1044, the cleaning brush 1044 is used to clean and wipe the part of the surface of the railing body 1 corresponding to the driving wheel body 8. The second sliding rod 1041 is rectangular, which can prevent the second sliding sleeve 1042 and the extension rod 1043 from rotating during the movement process.

[0023] The movement control device 105 includes a reciprocating lead screw 1051. The reciprocating lead screw 1051 is clamped on the transmission device 9. A threaded nut 1052 is sleeved outside the reciprocating lead screw 1051. One side of the threaded nut 1052 close to the second sliding rod 1041 is connected with a moving extrusion frame 1053. The moving extrusion frame 1053 is lapped outside the second sliding sleeve 1042. A first bearing 1054 is sleeved outside the reciprocating lead screw 1051. The first bearing 1054 is clamped on the second support plate 1055. The second support plate 1055 is connected to the vertical plate 101. By setting the reciprocating lead screw 1051 and the threaded nut 1052, when the reciprocating lead screw 1051 rotates, it can control the threaded nut 1052 to achieve reciprocating movement in the vertical direction. By setting the moving extrusion frame 1053, the moving extrusion frame 1053 contacts the second sliding sleeve 1042, and the second sliding sleeve 1042 positions the moving extrusion frame 1053 to prevent the moving extrusion frame 1053 from rotating, ensuring the smooth and stable movement of the threaded nut 1052. And when the moving extrusion frame 1053 is controlled by the threaded nut 1052 to move downward, it will squeeze the second sliding sleeve 1042 to move downward. By setting the first bearing 1054 and the second support plate 1055, the first bearing 1054 supports and positions the reciprocating lead screw 1051, ensuring the smooth and stable rotation of the second transmission wheel 93, and at the same time keeping the moving extrusion frame 1053 in contact with the second sliding sleeve 1042.

[0024] Embodiment 2, as Figure 1-2 and Figure 5-6As shown in the figure, the swing cleaning device 12 includes a fixed plate 121. The fixed plate 121 is connected under the support frame 7. A second bearing 122 is inserted through one side of the fixed plate 121. A connecting shaft 123 is sleeved inside the second bearing 122. One end of the connecting shaft 123 close to the railing main body 1 is connected with a second bevel gear 124.

[0025] The second bevel gear 124 meshes with the first bevel gear 11. The other end of the connecting shaft 123 is connected with a circular plate 125. A coil spring 126 is sleeved outside the connecting shaft 123. One end of the coil spring 126 is connected with the second bearing 122, and the other end of the coil spring 126 is connected with the circular plate 125. The other side of the circular plate 125 is connected with a swing cleaning rod 127. The position of the swing cleaning rod 127 corresponds to the position of the speedometer main body 3. By setting the fixed plate 121 and the second bearing 122, the second bearing 122 supports and limits the connecting shaft 123 and the second bevel gear 124, ensuring that the position of the second bevel gear 124 relative to the first bevel gear 11 remains stable. By setting the connecting shaft 123 and the circular plate 125, it is convenient for the rotation of the second bevel gear 124 to control the rotation of the swing cleaning rod 127 through the connecting shaft 123 and the circular plate 125. By setting the swing cleaning rod 127, the surface of the speedometer main body 3 can be wiped and cleaned when the swing cleaning rod 127 rotates. By setting the coil spring 126, the coil spring 126 is used to apply torsion to the connecting shaft 123 and the swing cleaning rod 127, ensuring that the swing cleaning rod 127 will not shake randomly when the first bevel gear 11 is not meshed with the second bevel gear 124. After the first bevel gear 11 is separated from the second bevel gear 124, the coil spring 126 controls the swing cleaning rod 127 to reset. By setting the first bevel gear 11 and the second bevel gear 124, the teeth on the surface of the first bevel gear 11 are set to be half a circle, realizing the intermittent meshing between the first bevel gear 11 and the second bevel gear 124.

[0026] Embodiment 3, as Figure 1-2 and Figure 5 As shown in the figure, the rolling support device 13 includes a cross bar 131. The cross bar 131 is connected with the swing cleaning device 12. The other end of the cross bar 131 is connected with a spherical shell 132. A ball 133 is sleeved inside the spherical shell 132. The ball 133 is lapped outside the railing main body 1. By setting the spherical shell 132 and the ball 133, the ball 133 can roll on the surface of the railing main body 1, facilitating the support during the movement of the moving bracket 2 and ensuring the stability of the movement of the speedometer main body 3.

[0027] The working principle of the present invention: When it is necessary to control the position switching of the speedometer main body 3, directly control the driving wheel main body 8 to work. When the driving wheel main body 8 rotates, it will control the first transmission wheel 91 and the first bevel gear 11 to rotate. The first transmission wheel 91 controls the second transmission wheel 93 to rotate through the belt 92. The second transmission wheel 93 controls the reciprocating lead screw 1051 to rotate. The reciprocating lead screw 1051 drives the threaded nut 1052 and the moving extrusion frame 1053 to move downward. While the moving extrusion frame 1053 moves downward, it squeezes the second sliding sleeve 1042 to move downward. At this time, the second sliding sleeve 1042 is limited by the guide hole 102 to move downward, and the second sliding rod 1041 is squeezed downward to move along the first sliding rod 1032. At this time, the elastic component 1034 is compressed, and the extension rod 1043 and the cleaning brush 1044 move in an arc along the track of the guide hole 102, realizing the wiping and cleaning of the arc surface of the railing main body 1 by the cleaning brush 1044. The driving wheel main body 8 rolls on the surface of the railing main body 1. When the first bevel gear 11 is driven by the driving wheel main body 8 to rotate and meshes with the second bevel gear 124, the second bevel gear 124 drives the connecting shaft 123 and the circular plate 125 to rotate. At this time, the circular plate 125 drives the swing cleaning rod 127 to swing to wipe and clean the surface of the speedometer main body 3. When the first bevel gear 11 is disengaged from the second bevel gear 124, the coil spring 126 drives the second bevel gear 124 and the circular plate 125 to reset, realizing the reciprocating swing cleaning of the surface of the speedometer main body 3 by the swing cleaning rod 127. When the speedometer main body 3 moves to the designated position, control the driving wheel main body 8 to stop working.

[0028] Finally, several points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the communication inside two components, and can be directly connected. "Up", "down", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change; Second: In the attached drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments of the present disclosure are involved. Other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other; Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-point switching speed measuring device based on radio waves, comprising a guardrail body (1), characterized in that: A movable bracket (2) is slidably provided outside the railing body (1), a guide frame (5) is connected inside the movable bracket (2), a guide rod (4) is slidably provided inside the guide frame (5), the guide rod (4) is connected to the railing body (1), a fixed block (6) is connected inside the movable bracket (2), one side of the fixed block (6) is connected to a support frame (7), a driving wheel body (8) is penetrated and rotatably provided on the support frame (7), the driving wheel body (8) is connected to a transmission device (9), and the transmission device (9) is provided with A movable wiping device (10), the movable wiping device (10) being connected inside a movable bracket (2), the movable wiping device (10) being overlapped outside a railing body (1), a first bevel gear (11) being connected below the driving wheel body (8), a swing cleaning device (12) being meshed below the first bevel gear (11) and connected to a support frame (7), a rolling support device (13) being connected outside the swing cleaning device (12) on a side close to the railing body (1), the rolling support device (13) being connected outside the railing body (1).

2. The multi-point switching speed measuring device based on radio waves according to claim 1 is characterized in that: The transmission device (9) comprises a first transmission wheel (91), the first transmission wheel (91) being connected to the driving wheel body (8), a belt (92) being overlapped on the outside of the first transmission wheel (91), a second transmission wheel (93) being sleeved inside the belt (92), and the second transmission wheel (93) being clamped on the outside of the movable wiping device (10).

3. The multi-point switching speed measuring device based on radio waves according to claim 1 is characterized in that: The movable wiping device (10) comprises a vertical plate (101), the vertical plate (101) being connected to the inside of the movable bracket (2), a guide hole (102) being provided on one side of the vertical plate (101), two elastic supporting devices (103) being connected to the side of the vertical plate (101) close to the supporting frame (7), and a sliding cleaning device (104) being provided on the outside of the elastic supporting device (103).

4. The multi-point switching speed measuring device based on radio waves according to claim 3 is characterized in that: The sliding cleaning device (104) is slidably disposed in the guide hole (102); a moving control device (105) is overlapped on the outside of the sliding cleaning device (104); the moving control device (105) is connected to the outside of the vertical plate (101); and the moving control device (105) is disposed on the transmission device (9).

5. The multi-point switching speed measuring device based on radio waves according to claim 4 is characterized in that: The elastic support device (103) comprises a first support plate (1031), the first support plate (1031) is connected to the outside of the vertical plate (101), the first support plate (1031) is connected to a first sliding rod (1032), the first sliding rod (1032) is provided with a first sliding sleeve (1033) on its outer cover, the first sliding sleeve (1033) is clamped on the sliding cleaning device (104), the first sliding rod (1032) is provided with an elastic component (1034) on its outer cover, the bottom end of the elastic component (1034) is connected to the first support plate (1031), and the elastic component (1034) is connected under the first sliding sleeve (1033).

6. The multi-point switching speed measuring device based on radio waves according to claim 5 is characterized in that: The sliding cleaning device (104) comprises a second sliding rod (1041), the second sliding rod (1041) is clamped outside the first sliding sleeve (1033), the second sliding rod (1041) is provided with a second sliding sleeve (1042) outside the second sliding rod (1041), the side of the second sliding sleeve (1042) away from the driving wheel body (8) is connected to an extension rod (1043), the other end of the extension rod (1043) is connected to a cleaning brush (1044), the extension rod (1043) is slidably arranged in the guide hole (102), the cleaning brush (1044) is overlapped outside the railing body (1), the second sliding sleeve (1042) is overlapped with the mobile control device (105), and the second sliding rod (1041) is set to be rectangular.

7. The multi-point switching speed measuring device based on radio waves according to claim 6 is characterized in that: The mobile control device (105) comprises a reciprocating screw (1051), the reciprocating screw (1051) being mounted on the transmission device (9), a threaded cap (1052) being provided on the outside of the reciprocating screw (1051), a movable extrusion frame (1053) being connected to a side of the threaded cap (1052) close to the second sliding rod (1041), the movable extrusion frame (1053) being overlapped on the outside of the second sliding sleeve (1042), a first bearing (1054) being provided on the outer sleeve of the reciprocating screw (1051), the first bearing (1054) being mounted on a second support plate (1055), and the second support plate (1055) being connected to the outside of the vertical plate (101).

8. The multi-point switching speed measuring device based on radio waves according to claim 1 is characterized in that: The swing cleaning device (12) comprises a fixing plate (121), the fixing plate (121) being connected to the support frame (7), a second bearing (122) being provided through one side of the fixing plate (121), a connecting shaft (123) being sleeved in the second bearing (122), and a second bevel gear (124) being connected to one end of the connecting shaft (123) close to the railing body (1).

9. The multi-point switching speed measuring device based on radio waves according to claim 8, characterized in that: The second bevel gear (124) is meshed with the first bevel gear (11); the other end of the connecting shaft (123) is connected to a circular plate (125); a coil spring (126) is provided on an outer sleeve of the connecting shaft (123); one end of the coil spring (126) is connected to the second bearing (122); the other end of the coil spring (126) is connected to the circular plate (125); the other side of the circular plate (125) is connected to a swing cleaning rod (127); the position of the swing cleaning rod (127) corresponds to the position of the speedometer body (3).

10. The multi-point switching speed measuring device based on radio waves according to claim 1, characterized in that: The rolling support device (13) comprises a crossbar (131), the crossbar (131) being connected to the swing cleaning device (12), the other end of the crossbar (131) being connected to a ball shell (132), a ball (133) being sleeved in the ball shell (132), and the ball (133) being overlapped on the outside of the railing body (1).

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