Liftable road height-limiting intelligent early warning device

Abstract

The invention discloses a lifting type road height-limiting intelligent early warning device which comprises a speed bump and an electric control system, the speed bump, an auxiliary supporting frame and a main supporting frame are sequentially fixed to a road in the specified driving direction of a vehicle, and a plurality of monitoring cameras are fixed to the top end of the auxiliary supporting frame; a plurality of first distance measuring sensors for measuring distances downwards are sequentially installed on the upper portion of the main supporting frame from left to right, an auxiliary indicating dial is fixed to the upper portion of the auxiliary supporting frame, and horizontal first servo motors are fixed to the front portion and the rear portion of the main supporting frame in the left-right direction correspondingly. The speed bump is arranged in the vehicle coming direction firstly, so that a driver can actively reduce the speed of the vehicle after observing the speed bump, even if the speed bump is not observed by the driver, the speed of the vehicle can be reduced after rolling, the driver is forced to decelerate in time, and lifting of the lifting rod is achieved by controlling the action of the electric drive lifting mechanism, so that data H is changed; the first servo motor is controlled to rotate forwards and backwards.

Description

Technical Field

[0001] The present invention relates to a road height limit device, and in particular to a liftable road height limit intelligent warning device. Background Art

[0002] For the needs of protecting road facilities, ensuring the safety of overhead lines, restricting the passage of specific vehicles, etc., height limit signs and height limit poles are set according to corresponding height limit standards to limit the height of objects (mainly vehicles) that can pass. In the prior art, height limit devices that can change the height limit have been provided, such as a variable height height limit gantry provided by a Chinese invention patent with the application number 202410713764.9 and a height limit device for road traffic provided by a Chinese utility model patent with the application number 202421184605.6. In addition, a road and bridge height limit warning device is provided by a Chinese utility model patent with the application number 201720166890.2. This device can pre-detect over-height vehicles before the vehicle passes through the height limit frame of the road bridge and give timely voice warnings and screen display warnings to the driver. However, when the existing height limit devices change the height limit, it is difficult to conveniently and quickly change the width limit. Some vehicles may have a large width, resulting in a large self-weight or noise, etc., even though their height is not high, which will still have an adverse impact. That is, it highlights the deficiencies in the convenience of adjusting the height limit and width limit and the lack of intelligence in restricting passage in the prior art; a Chinese invention patent with the application number 202411002082.3 provides a road height limit frame. This height limit frame can protect the height limit frame when it is hit by a vehicle through a force unloading mechanism and a deceleration mechanism. However, this device cannot decelerate the vehicle in time before it hits the main equipment, which is not conducive to the safety of the height limit frame, highlighting the deficiencies of the prior art. Summary of the Invention

[0003] The purpose of the present invention is to provide a liftable road height limit intelligent warning device to solve the technical problems of the deficiencies in the convenience of adjusting the height limit and width limit, the lack of intelligence in restricting passage, and the inability to decelerate the vehicle as early as possible in the prior art.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: A liftable intelligent warning device for road height limit, comprising a speed bump and an electric control system. Along the specified driving direction of vehicles on the road, a speed bump, a secondary support frame and a main support frame are sequentially fixed. At the top of the secondary support frame, a plurality of monitoring cameras are fixed, and a plurality of first distance measuring sensors for downward distance measurement are sequentially installed from left to right on the upper part. A secondary indicator panel is fixed on the upper part of the secondary support frame. On the front and rear parts of the main support frame, a horizontal first servo motor is fixed in the left-right direction respectively. The rotating shafts of the two first servo motors are coaxially fixed with main bidirectional lead screws respectively. The main bidirectional lead screws are rotatably connected to the main support frame, and the external thread directions of the left and right parts are opposite. A sliding seat is threadedly connected to each of the left and right parts of the main bidirectional lead screw. The sliding seat is slidably connected to the main support frame in the left-right direction. Each sliding seat is respectively fixed with an electric drive lifting mechanism. Each electric drive lifting mechanism respectively controls the lifting of a vertical lifting rod, and is respectively equipped with a second distance measuring sensor for measuring the lifting distance of the lifting rod. At the adjacent end parts of the sliding seats on the left and right parts of the main support frame, a third distance measuring sensor for measuring the left-right distance to the middle part of the main support frame is respectively fixed. A display screen is fixed at the top of the main support frame. The monitoring cameras, the first distance measuring sensors, the first servo motors, the electric drive lifting mechanisms, the second distance measuring sensors, the third distance measuring sensors, the display screen and the electric control system are electrically connected. The electric control system is externally connected to a power supply and transmits signals through wired transmission or wireless transmission. Each lifting rod is respectively equipped with a light-emitting indicator.

[0005] On the basis of the above technical solution, the light-emitting indicator comprises an LED lamp, a propagation hole, a light leakage hole and a flat nozzle. An LED lamp for downward light emission is respectively fixed on the upper part of each lifting rod. A propagation hole extending upward is opened at the bottom end of each lifting rod where the front part of the main support frame is located. Each lifting rod where the front part of the main support frame is located is made of an opaque material. Light leakage holes communicating with the propagation hole are sequentially opened from top to bottom on the front part of each lifting rod where the front part of the main support frame is located. The lifting rod where the rear part of the main support frame is located is made of a transparent material. A flat nozzle communicating with the propagation hole is respectively fixed at the bottom end of each lifting rod where the front part of the main support frame is located. The flat nozzle penetrates up and down, and the flat structure at the bottom extends along the road extension direction. The LED lamp is electrically connected to the electric control system.

[0006] On the basis of the above technical solution, the light-emitting indicator further comprises a reflective coating, a light-transmitting sheet and a reflective warning sticker. A reflective coating is painted on the inner wall of each propagation hole. A light-transmitting sheet with a striking color is respectively fixed in each light leakage hole. The light-transmitting sheet is in close contact with the front end of the lifting rod. A reflective warning sticker is pasted on the outer wall of each lifting rod where the front part of the main support frame is located.

[0007] On the basis of the above technical solution, the lifting mechanism includes a second servo motor, an upper guide cylinder, a lower guide cylinder, a first rack, a first gear, and a dust-proof housing. At the top of each sliding seat, a second servo motor extending in the left-right direction is respectively fixed, and a vertical upper guide cylinder is fixed at the top. At the bottom of each sliding seat, a vertical lower guide cylinder is respectively fixed. The upper guide cylinder and the lower guide cylinder are vertically communicated with each other. Each lifting rod is respectively fixed with a vertical first rack. The rotating shaft of the second servo motor is coaxially fixed with a first gear. Each first rack is respectively engaged with each first gear. Each upper guide cylinder is respectively fixed with a dust-proof housing. The first gear is inserted into the dust-proof housing with a gap, and the dust-proof housing is rotatably connected to the rotating shaft of the second servo motor. The second servo motor has a braking function and is electrically connected to the electronic control system. The lifting rod is slidably connected to the upper guide cylinder and the lower guide cylinder up and down. The second distance measuring sensor is fixed at the top end of the inner wall of the upper guide cylinder and measures the distance to the top end of the lifting rod downward.

[0008] On the basis of the above technical solution, a first brush holder is fixed at the bottom of the lifting rod. Each first brush holder is respectively fixed with multiple bundles of first bristles extending in the left-right direction. When the lifting rod moves up and down to a certain position, the first bristles can clean the third distance measuring sensor up and down. A cleaning cloth is pasted and fixed on the inner wall of the lower guide cylinder, and the cleaning cloth is in contact with the outer wall of the lifting rod.

[0009] On the basis of the above technical solution, the liftable road height limit intelligent warning device further includes a cleaning mechanism. The cleaning mechanism includes a third servo motor, a secondary bidirectional lead screw, a sliding frame, second bristles, an arc-shaped plate, third bristles, and fourth bristles. The secondary support frame is fixed with a third servo motor in the left-right direction and rotatably connected with a secondary bidirectional lead screw in the left-right direction. The thread directions of the left and right parts of the secondary bidirectional lead screw are opposite, and the left and right parts are respectively threadedly connected with a sliding frame. Multiple bundles of second bristles are fixed on the upper part of the sliding frame, and the sliding frame is slidably connected to the secondary support frame in the left-right direction. The second bristles can contact the monitoring camera. Arc-shaped plates with openings downward are respectively fixed at the left and right ends of the sliding seat and the left and right ends of the sliding frame. Multiple bundles of third bristles are respectively fixed on the inner walls of the arc-shaped plates, and each third bristle is respectively attached to the outer wall of the main bidirectional lead screw or the secondary bidirectional lead screw. Multiple bundles of fourth bristles are fixed at the bottom of the sliding frame. The first distance measuring sensor is vertically fixed at the bottom end of the upper part of the secondary support frame, and the fourth bristles can be attached to each first distance measuring sensor.

[0010] On the basis of the above technical solution, the speed bump is composed of a plurality of deceleration components adjacent to each other in the left-right direction. The deceleration component includes a support housing, a support platform, a lifting seat, a first air cylinder, a first piston, a compression spring, a first air inlet nozzle, a first air outlet nozzle, a first one-way valve, a nut, an exhaust hole, and a ventilation channel. At the front and rear ends of the upper part of the support housing, a support platform is fixed respectively. The bottom end of the support platform is in contact with the road surface, and both the front and rear parts are in the shape of a slope. The support housing is embedded and fixed in the road. A vertical lifting seat is slidably connected up and down tightly in the support housing. The top of the lifting seat is in the shape of an isosceles trapezoid gathering shape. At the bottom end of the inner wall of the support housing, a vertical first air cylinder is fixed. At the bottom of the lifting seat, a vertical first piston is fixed. The first air cylinder and the first piston are slidably connected up and down in a sealed manner. At the bottom end of the first piston, a vertical compression spring is fixed. The bottom end of the compression spring is fixed to the bottom end of the inner wall of the support housing. The left part of the first air cylinder is fixedly communicated with a first air inlet nozzle, and the right part is fixedly communicated with a first air outlet nozzle. The first air inlet nozzle and the first air outlet nozzle are respectively fixed with a first one-way valve. The first one-way valve of the first air inlet nozzle only allows gas to enter the first air cylinder, and the first one-way valve of the first air outlet nozzle only allows gas to flow out of the first air cylinder. The end of the first air outlet nozzle is threadedly connected with a nut. The nut axially penetrates an exhaust hole. The first air inlet nozzle and the first air outlet nozzle are respectively communicated with the inner cavity of the support housing. Each lifting seat is provided with a ventilation channel communicating with the outside and the inner cavity of the support housing.

[0011] On the basis of the above technical solution, a vertical second rack is fixed to the left and right parts of each lifting seat respectively. At the rear part of each support housing, two support shafts extending in the left-right direction are fixed, and a gear speed increaser and a small generator are fixed at the rear part. The output shaft of the gear speed increaser is coaxially fixed with the rotating shaft of the small generator, and the input shaft is coaxially fixed with the support shafts on the left and right parts of the support housing. A second gear is fixed to each support shaft respectively. Each second gear is meshed with each second rack respectively. The electric control system is electrically connected to a storage battery. The small generator is electrically connected to the storage battery.

[0012] On the basis of the above technical solution, the ventilation channel includes a main channel and a secondary channel. The main channels are provided at the left and right parts of the lifting seat respectively. The upper part of the main channel is inclined downward and penetrates through the left and right ends of the lifting seat, and the bottom penetrates downward through the bottom end of the lifting seat. The secondary channels are provided at the front and rear parts of the lifting seat respectively. The upper part of the secondary channel is inclined downward and penetrates through the front and rear ends of the lifting seat. The liftable road height limit intelligent warning device further includes a blowing mechanism. The blowing mechanism includes a second air cylinder, a second air inlet nozzle, a second air outlet nozzle, a second piston, a third rack, a third gear, and a second one-way valve. The front end inner wall of the support housing is fixed with a second air cylinder. The second air cylinder is fixedly communicated with a second air inlet nozzle and a second air outlet nozzle, and is hermetically and slidably connected with a second piston in the front and rear directions. Each of the rear parts of the second pistons is fixedly provided with a third rack extending in the front and rear directions. The third rack is slidably connected with the support housing in the front and rear directions. The support shaft is coaxially fixed with a third gear. The third rack is engaged with the upper part of the third gear. The second rack is engaged with the rear part of the second gear. Each of the second air outlet nozzles is connected to the bottom of the secondary channel through a surplus freely bendable pipe. Each of the second air inlet nozzles and each of the second air outlet nozzles are respectively fixed with a second one-way valve. The second one-way valve of the second air inlet nozzle only allows gas to enter the second air cylinder, and the second one-way valve of the second air outlet nozzle only allows gas to flow out of the second air cylinder. The second air inlet nozzle is communicated with the inner cavity of the support housing.

[0013] On the basis of the above technical solution, a dynamic weighbridge is further fixed on the road. The dynamic weighbridge is closer to the oncoming vehicle direction than the speed bump and is electrically connected to the electric control system. The electric control system includes a distribution box and a controller. The distribution box is fixed with a man-machine interaction panel. The man-machine interaction panel is fixed with a scanner and a face recognition camera. The man-machine interaction panel, the scanner, the face recognition camera, the distribution box and the controller are electrically connected.

[0014] Compared with the prior art, the present invention has the following advantages: By first arranging a speed bump in the oncoming vehicle direction, the present invention can enable the driver to actively reduce the vehicle speed after observing it. Even if it is not observed by the driver, the vehicle speed can also be reduced after being run over, and the driver is forced to decelerate in time. By controlling the action of the electric drive lifting mechanism, the lifting of the lifting rod is realized, so as to change the data H. By controlling the first servo motor to rotate forward and backward, the sliding seats on the left and right parts of the main bidirectional lead screw can be made to approach and move away from each other, so as to change the data L. The passing vehicles can be warned by the light indicating member, so that they can pay attention to observe and easily know the actual vehicle height, width limit and height limit information through the display screen, realizing the intelligent warning effect.

[0015] The deceleration effect of the speed bump can be adjusted through the deceleration component to improve safety. When the electronic control system recognizes that the small generator is generating electricity, it immediately controls the monitoring camera, the first distance measuring sensor, the second distance measuring sensor, the third distance measuring sensor, and the display screen to be powered on and work for a certain period of time, thereby saving a certain amount of electric energy and being more energy-saving, environmentally friendly, and intelligent.

[0016] By setting a dynamic weighing scale in front of the speed bump, the weight of the vehicle about to pass can be detected and displayed on the display screen, and the weight limit is also displayed at the same time, so as to cooperate with the height limit, width limit, and weight limit to restrict the passing vehicles together, and at the same time improve the discrimination ability for special vehicles, making the restricted passage more intelligent.

[0017] Using the face recognition camera and scanner, the personnel operating the human-machine interaction panel can be subject to face recognition and document recognition, so as to judge whether they have the operation permission and achieve intelligent control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a partial axonometric structural schematic diagram of the present invention.

[0019] Figure 2 It is a front view schematic diagram when the main bidirectional screw rod of the present invention cooperates with the sliding seat.

[0020] Figure 3 It is a cooperation schematic diagram of the sliding frame and the auxiliary support frame of the present invention.

[0021] Figure 4 It is a side sectional structural schematic diagram when the lifting rod of the present invention cooperates with the upper guiding cylinder, the sliding seat, and the lower guiding cylinder.

[0022] Figure 5 It is an axonometric structural schematic diagram when the lifting seat of the present invention cooperates with the support housing.

[0023] Figure 6 It is a top view schematic diagram of the support housing of the present invention.

[0024] Figure 7 It is a front sectional structural schematic diagram when the lifting seat of the present invention cooperates with the support housing.

[0025] Figure 8 It is a right sectional structural schematic diagram when the lifting seat of the present invention cooperates with the support housing.

[0026] Figure 9 It is a right view schematic diagram of the distribution box of the present invention.

[0027] Figure 10 It is a calculation schematic diagram of the numerical value L and the numerical value H of the present invention.

[0028] In the figure: 1, speed bump; 2, secondary support frame; 3, main support frame; 4, monitoring camera; 5, first distance measuring sensor; 6, secondary indicating disc; 7, first servo motor; 8, main bidirectional lead screw; 9, sliding seat; 11, lifting rod; 12, second distance measuring sensor; 13, third distance measuring sensor; 14, display screen; 16, LED lamp; 17, propagation hole; 18, light leakage hole; 19, flat nozzle; 21, light transmissive sheet; 23, second servo motor; 24, upper guiding cylinder; 25, lower guiding cylinder; 26, first rack; 27, first gear; 28, dust-proof housing; 29, first brush holder; 30, first brush bristles; 31, cleaning cloth; 33, third servo motor; 34, secondary bidirectional lead screw; 35, sliding frame; 36, second brush bristles; 37, arc-shaped plate; 38, third brush bristles; 39, fourth brush bristles; 41, support housing; 42, support platform; 43, lifting seat; 44, first air cylinder; 45, first piston; 46, compression spring; 47, first air inlet nozzle; 48, first air outlet nozzle; 49, first one-way valve; 50, nut; 51, exhaust hole; 52, ventilation channel; 53, second rack; 54, support shaft; 55, gear speed increaser; 56, small generator; 57, second gear; 58, main channel; 59, secondary channel; 61, second air cylinder; 62, second air inlet nozzle; 63, second air outlet nozzle; 64, second piston; 65, third rack; 66, third gear; 67, second one-way valve; 69, distribution box; 71, human-computer interaction panel; 72, scanner; 73, face recognition camera. Detailed implementation mode

[0029] The present invention will be further elaborated in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] As Figures 1-10As shown in the figure, a liftable intelligent warning device for road height limit includes a speed bump 1 and an electric control system 74. Along the specified driving direction of vehicles on the road, a speed bump 1, a secondary support frame 2, and a main support frame 3 are successively fixed. At the top of the secondary support frame 2, a plurality of monitoring cameras 4 are fixed, and a plurality of first distance measuring sensors 5 for downward distance measurement are successively installed from left to right on the upper part. A secondary indicator panel 6 is fixed on the upper part of the secondary support frame 2. On the front and rear parts of the main support frame 3, horizontal first servo motors 7 are respectively fixed in the left-right direction. The rotating shafts of the two first servo motors 7 are respectively coaxially fixed with main bidirectional lead screws 8. The main bidirectional lead screws 8 are rotatably connected to the main support frame 3, and the external thread helix directions of the left and right parts are opposite. Each of the left and right parts of the main bidirectional lead screw 8 is threadedly connected with a sliding seat 9. The sliding seat 9 is slidably connected to the main support frame 3 in the left-right direction. Each sliding seat 9 is respectively fixed with an electric drive lifting mechanism. Each electric drive lifting mechanism respectively controls the lifting of a vertical lifting rod 11, and is respectively installed with a second distance measuring sensor 12 for measuring the lifting distance of the lifting rod 11. At the adjacent ends of the sliding seats 9 on the left and right parts of the main support frame 3, third distance measuring sensors 13 for measuring the left-right distance to the middle of the main support frame 3 are respectively fixed. A display screen 14 is fixed at the top of the main support frame 3. The monitoring cameras 4, the first distance measuring sensors 5, the first servo motors 7, the electric drive lifting mechanisms, the second distance measuring sensors 12, the third distance measuring sensors 13, the display screen 14, and the electric control system 74 are electrically connected. The first distance measuring sensors 5, the second distance measuring sensors 12, and the third distance measuring sensors 13 are known prior arts, such as laser distance measuring sensors. The electric control system 74 is externally powered and transmits signals through wired transmission or wireless transmission. Each of the lifting rods 11 is respectively installed with a light-emitting indicator.

[0031] During use, by first fixing the speed bump 1 in the oncoming vehicle direction, it is possible to cause the driver to actively reduce the vehicle speed after observing it. Even if it is not observed by the driver, the vehicle speed can still be reduced after being run over, and the driver is forced to decelerate in a timely manner. As the vehicle travels, it can be observed by the monitoring camera 4, thereby recording the vehicle information. Then, it passes under the first distance measuring sensor 5 to measure the actual height of the vehicle, and then it is displayed on the display screen 14. At the same time, the real-time height limit and real-time width limit of the liftable road height limit intelligent warning device are displayed. By comparing with the real-time height limit and real-time width limit, the driver can determine by himself whether the vehicle can pass. The secondary indicating disc 6 is used to mark the height limit of the secondary support frame 2, and the height limit of the secondary support frame 2 should not be less than the height limit of the main support frame 3. The real-time height limit data H is obtained by measuring the lifting distance of the lifting rod 11 by the second distance measuring sensor 12 and then making corresponding increases or decreases with the actually installed ground clearance height of the lifting rod 11 set in advance. The real-time width limit data L is the real-time distance L1 from the sliding seat 9 at the front of the main support frame 3 to the middle of the main support frame 3 measured by the third distance measuring sensor 13 (corrected according to the width L4 in the middle of the main support frame 3), and then increases or decreases according to the left and right installation distance L2 between the sliding seat 9 and the lifting rod 11 to obtain L. The gap L3 between the sliding seat 9 and the left and right parts of the main support frame 3 can control the sliding seat 9 at the rear of the main support frame 3 to drive the lifting rod 11 thereon to move to the equal division of the gap, so as to partially fill the gap and prevent over-width and over-height vehicles from passing. The changes in the real-time data H and L depend on the lifting and left and right movement of the lifting rod 11. Specifically, by controlling the action of the electric drive lifting mechanism, the lifting of the lifting rod 11 is realized, thereby changing the data H; by controlling the first servo motor 7 to rotate forward and backward, the main bidirectional lead screw 8 can be used to make the sliding seats 9 on its left and right parts approach and move away from each other, thereby changing the data L. And the passing vehicles can be warned by the light-emitting indicator, prompting the driver to pay attention to observe, so as to timely know the actual vehicle height, width limit and height limit information through the display screen 14, achieving the intelligent warning effect.

[0032] The light-emitting indicator includes an LED lamp 16, a propagation hole 17, a light leakage hole 18, and a flat nozzle 19. Downward-emitting LED lamps 16 are respectively fixed on the upper parts of the lifting rods 11. Propagation holes 17 extending upward are opened at the bottoms of the lifting rods 11 where the front part of the main support frame 3 is located. The lifting rods 11 where the front part of the main support frame 3 is located are made of opaque materials. Light leakage holes 18 communicating with the propagation holes 17 are successively opened from top to bottom on the front parts of the lifting rods 11 where the front part of the main support frame 3 is located. The lifting rods 11 where the rear part of the main support frame 3 is located are made of transparent materials. Flat nozzles 19 communicating with the propagation holes 17 are respectively fixed at the bottoms of the lifting rods 11 where the front part of the main support frame 3 is located. The flat nozzles 19 penetrate up and down, and the flat structure at the bottom extends along the road extension direction. The LED lamp 16 is electrically connected to the electric control system 74.

[0033] Furthermore, the light emitted by the LED lamp 16 can be emitted through the propagation holes 17, the light leakage holes 18, and the flat nozzle 19, and further emitted forward and downward. When emitted forward, it can be promptly sensed by the driver, thus achieving a warning effect. After being emitted downward, by using the flat nozzle 19, a projection can be formed on the ground, achieving an effect similar to a marking line, that is, it can guide the vehicle to travel correctly within the width limit (i.e., the left-right distance between the two closest lifting rods 11 to the middle of the main support frame 3), improving convenience and safety.

[0034] The light-emitting indicator further includes a reflective coating, a light-transmitting sheet 21, and a reflective warning sticker. The inner walls of the respective propagation holes 17 are coated with a reflective coating. A light-transmitting sheet 21 with a prominent color is respectively fixed in each of the light leakage holes 18. The light-transmitting sheet 21 is in contact with the front end of the lifting rod 11. Reflective warning stickers are pasted on the outer walls of the respective lifting rods 11 where the front part of the main support frame 3 is located.

[0035] Furthermore, through the light-transmitting sheet 21, a prominent effect can be produced when the light passes through, facilitating the driver to sense it and improving safety. By using the reflective coating, it is conducive to the light being transmitted out through the propagation holes 17 and the light leakage holes 18, achieving efficient utilization of the light. By using the reflective warning sticker, the reflective effect can be improved, thereby enhancing the warning effect.

[0036] The lifting mechanism includes a second servo motor 23, an upper guide cylinder 24, a lower guide cylinder 25, a first rack 26, a first gear 27, and a dust-proof housing 28. A second servo motor 23 extending in the left-right direction is respectively fixed to the top of each sliding seat 9, and a vertical upper guide cylinder 24 is fixed to the top. A vertical lower guide cylinder 25 is respectively fixed to the bottom of each sliding seat 9. The upper guide cylinder 24 and the lower guide cylinder 25 are vertically communicated with each other. Each lifting rod 11 is respectively fixed with a vertical first rack 26. The rotating shaft of the second servo motor 23 is coaxially fixed with a first gear 27. Each first rack 26 is respectively engaged with each first gear 27. Each upper guide cylinder 24 is respectively fixed with a dust-proof housing 28. The first gear 27 is inserted into the dust-proof housing 28 with a clearance. The dust-proof housing 28 is rotatably connected to the rotating shaft of the second servo motor 23. The second servo motor 23 has a braking function and is electrically connected to the electric control system 74. The lifting rod 11 is slidably connected to the upper guide cylinder 24 and the lower guide cylinder 25 in the vertical direction. The second distance measuring sensor 12 is fixed to the top end of the inner wall of the upper guide cylinder 24 and measures the distance to the top end of the lifting rod 11 downward.

[0037] Further, by controlling the second servo motor 23 to rotate forward and backward and brake, and utilizing the meshing of the first rack 26 and the first gear 27, the lifting rod 11 can move up and down along the upper guide cylinder 24 and the lower guide cylinder 25, thereby changing the data H. The dust-proof housing 28 can, to a certain extent, provide dust protection for the first rack 26 and the first gear 27.

[0038] A first brush holder 29 is fixed to the bottom of the lifting rod 11. Each of the first brush holders 29 is respectively fixed with multiple bundles of first bristles 30 extending in the left-right direction. When the lifting rod 11 moves up and down to a certain position, the first bristles 30 can clean the third distance measuring sensor 13 up and down. A cleaning cloth 31 is adhesively fixed to the inner wall of the lower guide cylinder 25, and the cleaning cloth 31 is in contact with the outer wall of the lifting rod 11.

[0039] Further, by using the lifting of the lifting rod 11, the first bristles 30 can clean the third distance measuring sensor 13. When performing width limit, corresponding corrections should be made according to the size of the brush holder 29, so that the cleaning cloth 31 can clean the outer wall of the lifting rod 11, thereby ensuring that the third distance measuring sensor 13 and the lifting rod 11 can be used normally without being blocked by dust after long-term use.

[0040] The liftable road height limit intelligent warning device further includes a cleaning mechanism. The cleaning mechanism includes a third servo motor 33, a secondary bidirectional lead screw 34, a sliding frame 35, second bristles 36, an arc plate 37, third bristles 38, and fourth bristles 39. The secondary support frame 2 is fixedly provided with the third servo motor 33 in the left-right direction and rotatably connected with the secondary bidirectional lead screw 34 in the left-right direction. The thread directions of the left and right parts of the secondary bidirectional lead screw 34 are opposite, and the left and right parts are respectively threadedly connected with the sliding frame 35. The upper part of the sliding frame 35 is fixedly provided with multiple bundles of second bristles 36 and is slidably connected with the secondary support frame 2 in the left-right direction. The second bristles 36 can contact the monitoring camera 4. Arc plates 37 with openings downward are respectively fixed at the left and right ends of the sliding seat 9 and the left and right ends of the sliding frame 35. Multiple bundles of third bristles 38 are respectively fixed to the inner walls of the arc plates 37, and each of the third bristles 38 is in contact with the outer wall of the main bidirectional lead screw 8 or the secondary bidirectional lead screw 34. Multiple bundles of fourth bristles 39 are fixed to the bottom of the sliding frame 35. The first distance measuring sensor 5 is vertically fixed to the bottom end of the upper part of the secondary support frame 2, and the fourth bristles 39 can be in contact with each of the first distance measuring sensors 5.

[0041] Further, by controlling the third servo motor 33 to rotate forward and backward, the two sliding frames 35 can be moved closer to and away from each other by using the secondary bidirectional lead screw 34, so as to clean the monitoring camera 4 and the first distance measuring sensor 5 respectively by using the second brush bristles 36 and the fourth brush bristles 39. Then, the monitoring camera 4 and the first distance measuring sensor 5 can still be used normally without being blocked by dust after long-term use. During the forward and backward rotation of the main bidirectional lead screw 8 and the secondary bidirectional lead screw 34, compared with the rotation of the third brush bristles 38, the third brush bristles 38 are used to clean the main bidirectional lead screw 8 and the secondary bidirectional lead screw 34, facilitating the left and right movement of the sliding seat 9 and the sliding frame 35. The speed bump 1 is composed of a plurality of deceleration components adjacent to each other in the left-right direction. The deceleration component includes a support housing 41, a support platform 42, a lifting seat 43, a first air cylinder 44, a first piston 45, a compression spring 46, a first air inlet nozzle 47, a first air outlet nozzle 48, a first one-way valve 49, a nut 50, an exhaust hole 51, and a ventilation passage. At the front and rear ends of the upper part of the support housing 41, a support platform 42 is fixedly arranged respectively. The bottom end of the support platform 42 is in contact with the road surface, and both the front and rear parts are in a slope shape. The support housing 41 is embedded and fixed in the road. A vertical lifting seat 43 is closely and slidably connected up and down in the support housing 41. The top of the lifting seat 43 is in a converging shape of an isosceles trapezoid. At the bottom end of the inner wall of the support housing 41, a vertical first air cylinder 44 is fixedly arranged. At the bottom of the lifting seat 43, a vertical first piston 45 is fixedly arranged. The first air cylinder 44 is in sealed sliding connection with the first piston 45 up and down. At the bottom end of the first piston 45, a vertical compression spring 46 is fixedly arranged. The bottom end of the compression spring 46 is fixed to the bottom end of the inner wall of the support housing 41. The left part of the first air cylinder 44 is fixedly communicated with a first air inlet nozzle 47, and the right part is fixedly communicated with a first air outlet nozzle 48. First one-way valves 49 are respectively fixed to the first air inlet nozzle 47 and the first air outlet nozzle 48. The first one-way valve 49 of the first air inlet nozzle 47 only allows gas to enter the first air cylinder 44, and the first one-way valve 49 of the first air outlet nozzle 48 only allows gas to flow out of the first air cylinder 44. The end of the first air outlet nozzle 48 is threadedly connected with a nut 50. The nut 50 axially penetrates through an exhaust hole 51. The first air inlet nozzle 47 and the first air outlet nozzle 48 are respectively communicated with the inner cavity of the support housing 41. Each of the lifting seats 43 is provided with a ventilation passage communicating with the outside and the inner cavity of the support housing 41.

[0042] By setting up a deceleration component, when any deceleration component is damaged, only the corresponding deceleration component needs to be replaced. The support platform 42 can be used to achieve the deceleration effect while reducing rainwater ingress. Under normal circumstances, under the elastic repulsive force of the compression spring 46, the lifting seat 43 fully protrudes from the support housing 41. When the vehicle runs over it, the lifting seat 43 descends and still remains a part above the ground, thus achieving the shock deceleration effect. When the lifting seat 43 descends, the first piston 45 squeezes the air and discharges it through the first one-way valve 49, the first exhaust nozzle 48 and the exhaust hole 51, and finally discharges it through the air exchange channel. By replacing the nut 50 with exhaust holes 51 of different diameters, the speed of the gas discharged from the first air cylinder 44 can be controlled and adjusted appropriately according to the road speed limit. For example, when the exhaust hole 51 is small, when the vehicle runs over the lifting seat 43 at a high speed, the lifting seat 43 cannot fall in time, so the part protruding from the road surface is more, and then the shock deceleration effect is stronger. Correspondingly, if the vehicle runs over the lifting seat 43 at a low speed, the lifting seat 43 can fall in time, so the part protruding from the road surface is less, and then the shock deceleration effect is weaker. In this way, the deceleration effect of the speed bump 1 is adjusted to improve safety. After the vehicle passes by, under the elastic repulsive force of the compression spring 46, the lifting seat 43 and the first piston 45 gradually return to their original positions, and the air enters the first air cylinder 44 through the first one-way valve 49 and the first air inlet nozzle 47.

[0043] On the left and right sides of each lifting seat 43, a vertical second rack 53 is fixed respectively. At the rear of each support housing 41, two support shafts 54 extending in the left-right direction are fixed, and a gear speed increaser 55 and a small generator 56 are fixed at the rear. The output shaft of the gear speed increaser 55 is coaxially fixed with the rotating shaft of the small generator 56, and the input shaft is coaxially fixed with the support shafts 54 on the left and right sides of the support housing 41. Each support shaft 54 is respectively fixed with a second gear 57, and each second gear 57 meshes with each second rack 53 respectively. The electronic control system 74 is electrically connected to the storage battery 75, and the small generator 56 is electrically connected to the storage battery 75.

[0044] Furthermore, when the lifting seat 43 descends, the small generator 56 can be rotated to generate electricity through the second rack 53, the second gear 57, the support shaft 54 and the gear speed increaser 55, and the electricity is stored in the storage battery 75. When the electronic control system 74 recognizes that the small generator 56 generates electricity, it immediately controls the monitoring camera 4, the first distance measuring sensor 5, the second distance measuring sensor 12, the third distance measuring sensor 13 and the display screen 14 to be powered on and work for a certain period of time. When no electricity is generated, they can be powered off and not work, thus saving a certain amount of electric energy, being more energy-saving, environment-friendly and intelligent.

[0045] The ventilation passage includes a main passage 58 and a secondary passage 59. The left and right parts of the lifting seat 43 are each provided with a main passage 58. The upper part of the main passage 58 is inclined downward and runs through the left and right ends of the lifting seat 43, and the bottom runs through the bottom end of the lifting seat 43 downward. The front and rear parts of the lifting seat 43 are each provided with a secondary passage 59. The upper part of the secondary passage 59 is inclined downward and runs through the front and rear ends of the lifting seat 43. The liftable road height limit intelligent warning device further includes a blowing mechanism. The blowing mechanism includes a second air cylinder 61, a second air inlet nozzle 62, a second air outlet nozzle 63, a second piston 64, a third rack 65, a third gear 66, and a second one-way valve 67. The front end of the inner wall of the support housing 41 is fixed with a second air cylinder 61. The second air cylinder 61 is fixedly connected to a second air inlet nozzle 62 and a second air outlet nozzle 63, and is hermetically and slidably connected to a second piston 64 in the front and rear directions. Each of the rear parts of the second pistons 64 is fixedly provided with a third rack 65 extending in the front and rear directions. The third rack 65 is slidably connected to the support housing 41 in the front and rear directions. The support shaft 54 is coaxially fixed with a third gear 66. The upper part of the third rack 65 is engaged with the third gear 66. The second rack 53 is engaged with the rear part of the second gear 57. Each of the second air outlet nozzles 63 is connected to the bottom of the secondary passage 59 through a pipe that can be freely bent. Each of the second air inlet nozzles 62 and each of the second air outlet nozzles 63 are respectively fixed with a second one-way valve 67. The second one-way valve 67 of the second air inlet nozzle 62 only allows gas to enter the second air cylinder 61, and the second one-way valve 67 of the second air outlet nozzle 63 only allows gas to flow out of the second air cylinder 61. The second air inlet nozzle 62 is connected to the inner cavity of the support housing 41.

[0046] Further, the downwardly inclined main passage 58 and secondary passage 59 can reduce the ingress of dust and rainwater. When the lifting seat 43 descends, the second piston 64 can be made to move forward through the third rack 65 and the third gear 66, thereby squeezing air out from the second one-way valve 67 and the second air outlet nozzle 63, and further discharging it through the secondary passage 59, so as to blow the front and rear sides of the lifting seat 43, making the dust and the like contaminated after the lifting seat 43 contacts the tire move away, reducing the jamming phenomenon that occurs when the lifting seat 43 ascends and descends due to dust, and at the same time buffering the descent of the lifting seat 43. When the lifting seat 43 gradually returns to its original position under the elastic repulsive force of the compression spring 46, air enters the second air cylinder 61 through the main passage 58, the second one-way valve 67, and the second air inlet nozzle 62.

[0047] There is also a dynamic weighbridge fixed on the road. The dynamic weighbridge is closer to the oncoming vehicle direction than the speed bump 1 and is electrically connected to the electric control system 74. The electric control system 74 includes a distribution box 69 and a controller. The controller is known prior art, such as a PLC and an industrial computer. The distribution box 69 is fixed with a human-machine interaction panel 71. The human-machine interaction panel 71 is fixed with a scanner 72 and a face recognition camera 73. The human-machine interaction panel 71, the scanner 72, the face recognition camera 73, the distribution box 69 and the controller are electrically connected.

[0048] Furthermore, by setting a dynamic weighbridge in front of the speed bump 1, the weight of the vehicle about to pass can be detected and displayed on the display screen 14, and the weight limit is also displayed. Thus, together with the height limit, width limit and weight limit, the passing vehicles can be restricted, and at the same time, the discrimination ability for special vehicles is improved. For example, compared with restricting overweight vehicles only by height limit, vehicles can be identified more accurately. That is, some vehicles have a low height but a large weight, while some vehicles have a high height but a light weight, making the restriction of passage more intelligent. The first servo motor 7 and the second servo motor 23 can be actively controlled by using the human-machine interaction panel 71 to facilitate the passage of some special vehicles (such as emergency rescue vehicles). By using the face recognition camera 73 and the scanner 72, the personnel operating the human-machine interaction panel 71 can be subjected to face recognition and document recognition (such as driver's license and relevant documents) to determine whether they have the operating authority, realizing intelligent control.

[0049] The above is the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the teachings of the present invention, without departing from the principle and spirit of the present invention, the changes, modifications, substitutions and variations made to the implementation manners still fall within the protection scope of the present invention.

Claims

1. A liftable road height limit intelligent warning device, comprising a speed bump (1) and an electric control system (74), wherein the speed bump (1), a secondary support frame (2) and a main support frame (3) are fixed in sequence on the road along the specified driving direction of the vehicle, a plurality of monitoring cameras (4) are fixed on the top of the secondary support frame (2), and a plurality of No. 1 distance measuring sensors (5) for downward distance measurement are installed in sequence from left to right on the upper portion, a secondary indicator plate (6) is fixed on the upper portion of the secondary support frame (2), and the device is characterized in that: A horizontal No. 1 servo motor (7) is fixed to the front and rear parts of the main support frame (3) along the left and right directions, and a main bidirectional screw rod (8) is coaxially fixed to the rotating shafts of the two No. 1 servo motors (7). The main bidirectional screw rod (8) is rotatably connected to the main support frame (3), and the external threads of the left and right parts are in opposite directions. The left and right parts of the main bidirectional screw rod (8) are threadedly connected to a sliding seat (9), and the sliding seat (9) is slidably connected to the main support frame (3) left and right. Each sliding seat (9) is fixed with an electric drive lifting mechanism, and each electric drive lifting mechanism is respectively lifted and controlled by a vertical lifting rod (11), and is respectively equipped with a No. 2 distance measuring sensor for measuring the lifting distance of the lifting rod (11). A sensor (12) is provided, and adjacent ends of the sliding seats (9) on the left and right parts of the main support frame (3) are respectively fixed with a third distance measuring sensor (13) for measuring the left and right distance to the middle of the main support frame (3); a display screen (14) is fixed at the top of the main support frame (3); the monitoring camera (4), the first distance measuring sensor (5), the first servo motor (7), the electric drive lifting mechanism, the second distance measuring sensor (12), the third distance measuring sensor (13), the display screen (14) and the electric control system (74) are electrically connected; the electric control system (74) is externally connected to a power supply and performs signal transmission through wired transmission or wireless transmission; and each of the lifting rods (11) is respectively installed with a light-emitting indicator.

2. According to claim 1, a liftable road height limit intelligent warning device is characterized by: The light-emitting indicator comprises an LED lamp (16), a transmission hole (17), a light leakage hole (18), and a flat mouth (19). A downward-emitting LED lamp (16) is fixed to the upper part of each lifting rod (11). A transmission hole (17) extending upward is provided at the bottom end of each lifting rod (11) where the front part of the main support frame (3) is located. The lifting rods (11) where the front part of the main support frame (3) is located are made of opaque material. The front part of each lifting rod (11) where the front part of the main support frame (3) is sequentially provided with light leakage holes (18) connected to the transmission hole (17) from top to bottom. The lifting rod (11) where the rear part of the main support frame (3) is made of transparent material. A flat mouth (19) connected to the transmission hole (17) is fixed to the bottom end of each lifting rod (11) where the front part of the main support frame (3) is located. The flat mouth (19) is penetrated from top to bottom, and the flat structure at the bottom extends along the extension direction of the road. The LED lamp (16) is electrically connected to the electric control system (74).

3. The intelligent warning device for height limit of a liftable road according to claim 2 is characterized in that: The luminous indicator also includes a reflective coating, a light-transmitting sheet (21), and a reflective warning sticker. The inner wall of each of the transmission holes (17) is painted with a reflective coating. A light-transmitting sheet (21) with a striking color is fixed in each of the light leakage holes (18). The light-transmitting sheet (21) is in contact with the front end of the lifting rod (11). The outer wall of each lifting rod (11) where the front part of the main support frame (3) is located is affixed with a reflective warning sticker.

4. A liftable road height limit intelligent warning device according to claim 2 or 3, characterized in that: The lifting mechanism comprises a No. 2 servo motor (23), an upper guide cylinder (24), a lower guide cylinder (25), a No. 1 rack (26), a No. 1 gear (27), and a dustproof housing (28). A No. 2 servo motor (23) extending in the left-right direction is fixed to the top of each sliding seat (9), and a vertical upper guide cylinder (24) is fixed to the top. A vertical lower guide cylinder (25) is fixed to the bottom of each sliding seat (9). The upper guide cylinder (24) and the lower guide cylinder (25) are connected to each other up and down. A vertical No. 1 rack (26) is fixed to each lifting rod (11). The rotating shaft of the No. 2 servo motor (23) is coaxially fixed with the No. 1 gear (27). , each of the No. 1 racks (26) is respectively meshed with each of the No. 1 gears (27), each of the upper guide cylinders (24) is respectively fixed with a dustproof housing (28), the No. 1 gear (27) is inserted into the dustproof housing (28) with a gap, the dustproof housing (28) is rotatably connected to the rotating shaft of the No. 2 servo motor (23), the No. 2 servo motor (23) has a braking function, and is electrically connected to the electric control system (74), the lifting rod (11) is slidably connected to the upper guide cylinder (24) and the lower guide cylinder (25) up and down, and the No. 2 distance measuring sensor (12) is fixed to the top of the inner wall of the upper guide cylinder (24) and measures the distance downward to the top of the lifting rod (11).

5. The intelligent warning device for height restriction on a liftable road according to claim 4 is characterized in that: A No. 1 brush holder (29) is fixed at the bottom of the lifting rod (11), and each of the No. 1 brush holders (29) is respectively fixed with a plurality of bundles of No. 1 bristles (30) extending in the left-right direction. When the lifting rod (11) moves up and down to a certain position, the No. 1 bristles (30) can clean the No. 3 distance measuring sensor (13) up and down. A cleaning cloth (31) is adhered and fixed to the inner wall of the lower guide cylinder (25), and the cleaning cloth (31) is in contact with the outer wall of the lifting rod (11).

6. The intelligent warning device for height restriction on a liftable road according to claim 1 is characterized in that: The liftable road height limit intelligent warning device further comprises a cleaning mechanism, the cleaning mechanism comprising a No. 3 servo motor (33), a secondary bidirectional screw rod (34), a sliding frame (35), No. 2 bristles (36), an arc plate (37), No. 3 bristles (38), and No. 4 bristles (39); the secondary support frame (2) is fixed with the No. 3 servo motor (33) in the left-right direction, and is rotatably connected with the secondary bidirectional screw rod (34) in the left-right direction; the left and right parts of the secondary bidirectional screw rod (34) have opposite screw threads, and the left and right parts are respectively threadedly connected with the sliding frame (35); a plurality of bundles of No. 2 bristles (36) are fixed on the upper part of the sliding frame (35), and are rotated in the left and right directions with respect to the secondary support frame (2). The right sliding connection is such that the No. 2 bristles (36) can contact the monitoring camera (4). The left and right ends of the sliding seat (9) and the left and right ends of the sliding frame (35) are respectively fixed with arc-shaped plates (37) with downward openings. The inner wall of each of the arc-shaped plates (37) is respectively fixed with a plurality of bundles of No. 3 bristles (38). Each of the No. 3 bristles (38) is respectively fitted with the outer wall of the main bidirectional screw rod (8) or the auxiliary bidirectional screw rod (34). The bottom of the sliding frame (35) is fixed with a plurality of bundles of No. 4 bristles (39). The No. 1 distance measuring sensor (5) is fixed in a vertical state at the upper bottom end of the auxiliary support frame (2). The No. 4 bristles (39) can fit with each of the No. 1 distance measuring sensors (5).

7. A scissor-type intelligent warning device for road height limit according to any one of claims 1, 2, 3, 5 and 6, characterized in that: The speed reduction belt (1) is composed of a plurality of speed reduction components which are adjacent to each other in the left-right direction. The speed reduction components include a support shell (41), a support platform (42), a lifting seat (43), a No. 1 air cylinder (44), a No. 1 piston (45), a compression spring (46), a No. 1 air inlet nozzle (47), a No. 1 exhaust nozzle (48), a No. 1 one-way valve (49), a nut (50), an exhaust hole (51), and a ventilation channel. The support shell (41) is fixed with a support platform (42) at both ends of its upper portion. The bottom end of the support shell (42) is in contact with the road surface, and the front and rear parts are both sloped. The support shell (41) is embedded and fixed in the road. A vertical lifting seat (43) is tightly connected to the support shell (41) for sliding up and down. The top of the lifting seat (43) is in an isosceles trapezoidal shape. A vertical No. 1 air cylinder (44) is fixed to the bottom end of the inner wall of the support shell (41). A vertical No. 1 piston (45) is fixed to the bottom of the lifting seat (43). The No. 1 air cylinder (44) and the No. 1 piston (45) are aligned with each other. The first piston (45) is connected with a vertical compression spring (46) at the bottom end, and the bottom end of the compression spring (46) is fixed to the bottom end of the inner wall of the support shell (41). The left part of the first gas cylinder (44) is fixedly connected with a first gas inlet nozzle (47), and the right part is fixedly connected with a first exhaust nozzle (48). The first gas inlet nozzle (47) and the first exhaust nozzle (48) are respectively fixed with a first check valve (49). The first check valve (49) of the first gas inlet nozzle (47) only allows gas to enter the first gas cylinder (44). Entering the No. 1 gas cylinder (44), the No. 1 one-way valve (49) of the No. 1 exhaust nozzle (48) only allows gas to flow out of the No. 1 gas cylinder (44), the end of the No. 1 exhaust nozzle (48) is threadedly connected with a nut (50), and the nut (50) is axially penetrated with an exhaust hole (51), the No. 1 air inlet nozzle (47) and the No. 1 exhaust nozzle (48) are respectively connected to the inner cavity of the support shell (41), and each of the lifting seats (43) is respectively provided with a ventilation channel connected to the outside and the inner cavity of the support shell (41).

8. The scissor-type intelligent warning device for height limit of road according to claim 7, characterized in that: A vertical No. 2 rack (53) is fixed to the left and right parts of each lifting seat (43); two support shafts (54) extending in the left and right directions are fixed to the rear part of each support shell (41); and a gear speed increaser (55) and a small generator (56) are fixed to the rear part; the output shaft of the gear speed increaser (55) is fixed to the same axis as the rotating shaft of the small generator (56); and the input shaft is fixed to the same axis as the support shafts (54) on the left and right parts of the support shell (41); a No. 2 gear (57) is fixed to each support shaft (54); each No. 2 gear (57) is meshed with each No. 2 rack (53); the electric control system (74) is electrically connected to the battery (75); and the small generator (56) is electrically connected to the battery (75).

9. The scissor-type intelligent warning device for road height limit according to claim 8, characterized in that: The ventilation channel comprises a main channel (58) and a secondary channel (59). The left and right parts of the lifting seat (43) are each provided with a main channel (58). The upper part of the main channel (58) is inclined downward and passes through the left and right ends of the lifting seat (43), and the bottom part is downwardly passed through the bottom end of the lifting seat (43). The front and rear parts of the lifting seat (43) are each provided with a secondary channel (59). The upper part of the secondary channel (59) is inclined downward and passes through the front and rear ends of the lifting seat (43). The liftable road The height-limited intelligent warning device further comprises a purge mechanism, the purge mechanism comprising a No. 2 air cylinder (61), a No. 2 air inlet nozzle (62), a No. 2 exhaust nozzle (63), a No. 2 piston (64), a No. 3 rack (65), a No. 3 gear (66), and a No. 2 one-way valve (67). The No. 2 air cylinder (61) is fixed to the front end of the inner wall of the support shell (41), the No. 2 air cylinder (61) is fixedly connected to the No. 2 air inlet nozzle (62) and the No. 2 exhaust nozzle (63), and the front and rear sealing and sliding connections are connected to two A third rack (65) extending in the front-to-rear direction is fixed to the rear of each of the second pistons (64), and the third rack (65) is connected to the support housing (41) in a front-to-rear sliding manner. A third gear (66) is coaxially fixed to the support shaft (54), and the third rack (65) is meshed with the upper part of the third gear (66), and the second rack (53) is meshed with the rear part of the second gear (57). Each of the second exhaust nozzles (63) is respectively The freely bendable pipe is connected to the bottom of the secondary channel (59); each of the No. 2 air inlet nozzles (62) and each of the No. 2 air exhaust nozzles (63) is respectively fixed with a No. 2 one-way valve (67); the No. 2 one-way valve (67) of the No. 2 air inlet nozzle (62) only allows gas to enter the No. 2 gas cylinder (61); the No. 2 one-way valve (67) of the No. 2 air exhaust nozzle (63) only allows gas to flow out of the No. 2 gas cylinder (61); the No. 2 air inlet nozzle (62) is connected to the inner cavity of the support shell (41).

10. A liftable road height limit intelligent warning device according to claim 8 or 9, characterized in that: A dynamic weighing scale is also fixed on the road. The dynamic weighing scale is closer to the direction of the oncoming vehicle than the speed bump (1) and is electrically connected to an electric control system (74). The electric control system (74) includes a distribution box (69) and a controller. The controller is a known prior art, such as a PLC and an industrial computer. The distribution box (69) is fixed with a human-machine interaction panel (71). The human-machine interaction panel (71) is fixed with a scanner (72) and a face recognition camera (73). The human-machine interaction panel (71), the scanner (72), the face recognition camera (73), the distribution box (69) and the controller are electrically connected.

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