An automatic speed measuring device for highways based on radio waves

Abstract

The present invention belongs to the field of speed measuring equipment, specifically an automatic speed measuring equipment for highways based on radio waves, including a protection box, a support frame fixedly installed at the bottom end of the protection box, a radio wave speed meter body fixedly installed on the inner side of the protection box, and the arrangement of an isolation plate and a rotating fan. When a vehicle passes through waves or a strong wind blows head-on, the air flow can pass through the hood and blow the rotating fan to rotate, and the isolation plate is driven to move up and down through a linkage component. During the up and down movement, the isolation plate will rub against the cleaning roller. At the same time, the vibration generated by the isolation plate during the movement can effectively remove the dust on the outside of the isolation plate, thereby realizing the self-cleaning function of the device and ensuring that the device can perform accurate speed measurement for a long time even in harsh environments.

Description

Technical Field

[0001] The invention belongs to the field of speed measuring equipment, in particular to an automatic speed measuring equipment for expressways based on radio waves. Background Art

[0002] With the development of science and technology, various roads and highways are being built rapidly. In order to maintain traffic order, it is necessary to install automatic speed cameras on highways to measure speed.

[0003] There are many types of automatic speed guns, including optical and radio wave speed guns. Radio wave speed guns accurately measure the speed of a vehicle by emitting radio waves.

[0004] A Chinese patent with publication number CN109147349A discloses a vehicle speed meter, which includes a vehicle detector, a first ultrasonic detector, a second ultrasonic detector, a control circuit board, a 1602-character liquid crystal display, a triangular prism plastic box, a first wire, and a second wire. The vehicle detector and the control circuit board are housed in the triangular prism plastic box. The vehicle speed meter can be installed on the side of a lane to detect the direction and speed of a vehicle in that lane.

[0005] Existing speed guns often lack self-cleaning functions, and some highway sections are built in dusty areas. Speed ​​guns that have been placed for a long time are easily covered by the dust in the sky, which blocks the view of the radio wave speed gun body. This leads to a series of problems such as inaccurate speed measurement. Manual cleaning will take a lot of time.

[0006] To this end, the present invention provides an automatic speed measuring device for highways based on radio waves. Summary of the Invention

[0007] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0008] The technical solution adopted by the present invention to solve the technical problem is as follows: the present invention is a radio wave-based automatic speed measurement device for highways, comprising a protective box, a support frame fixedly mounted at the bottom end of the protective box, a radio wave speed meter body fixedly mounted inside the protective box, and the radio wave speed meter body comprising: a radio wave transmitting component and a radio wave receiving component;

[0009] The radio wave transmitting component is used to transmit radio waves, and the radio waves are reflected after hitting the vehicle;

[0010] The radio wave receiving component is used for receiving the reflected radio waves;

[0011] The front end of the protection box is provided with an observation slot and a lifting slot, the inner side of the lifting slot is slidably connected to an isolation plate, the middle part of the isolation plate is fixedly installed with a transparent mirror, the inner side of the observation slot is rotatably connected to two sets of cleaning rollers, and a blow hood is fixedly installed on one side of the protection box, and the inner middle part of the blow hood is rotatably connected to a rotating fan, and a linkage component is provided between the rotating fan and the isolation plate, and with the setting of the isolation plate and the rotating fan, when the vehicle passes through waves or strong winds blow head-on, with the setting of the transparent ends of the blow hood, air flow can pass through the blow hood and blow the rotating fan to rotate, and the isolation plate is driven up and down by the linkage component. During the up and down movement of the isolation plate, it will rub against the cleaning roller, and with the vibration generated by the isolation plate during the movement, the dust on the outside of the isolation plate can be effectively removed, thereby realizing the self-cleaning function of the device, and ensuring that the device can perform accurate speed measurement for a long time in harsh environments.

[0012] Preferably, a sleeve is fixedly installed at the bottom end of the isolation plate, and a sliding rod is fixedly installed at the inner bottom end of the lifting groove. The outer side of the sliding rod is slidably connected to the inner side of the sleeve, and the sliding rod and the sleeve are both cylindrical, and the outer diameter of the sliding rod is smaller than the inner diameter of the sleeve. The shaking downward process of the isolation plate can not only prolong the time for the transparent mirror to rub the cleaning roller, thereby increasing the cleaning effect, but also the shaking isolation plate can help shake off the dust on the outside of the isolation plate, thereby further increasing the self-cleaning effect of the device.

[0013] Preferably, the rotating fan includes a transmission rod and several groups of fan blades, the linkage assembly includes a transmission belt, the inner side of the protection box is rotatably connected to a rotating shaft, a transmission belt is connected between the transmission rod and the rotating shaft, and an impact block 2 is fixedly installed on the outer side of the rotating shaft, and an impact block 1 is provided on one side of the isolation plate, and the impact block 1 is located above the impact block 2, which can assist the swinging movement of the sleeve during the falling process, thereby further enhancing the self-cleaning effect of the isolation plate.

[0014] Preferably, an inner groove is provided on one side of the isolation plate, one end of the impact block one is located on the inner side of the inner groove, and a first rotating rod is movably installed on the other end of the impact block one, and the two ends of the first rotating rod are fixedly connected to the inner side of the isolation plate, and a torsion spring is fixedly installed between the first rotating rod and the impact block one. Through the setting of impact and bending, it can prevent the impact potential energy of the impact block two from being too large when the wind force is too strong, and the isolation plate is lifted up to too high a height, causing the top of the isolation plate to hit the inner wall of the protective box, causing damage to the isolation plate and the protective box. At the same time, with the setting of the torsion spring, it can also prevent the impact block two from rigidly colliding with the impact block one for a long time, which easily causes damage to the impact block two and the impact block one, thereby improving the service life of the device.

[0015] Preferably, a shaking groove is provided on one side of the isolation plate, and the shaking groove is located above the inner groove. One side of the isolation plate is rotatably connected to a rotating rod, and the rotating rod is located between the shaking groove and the inner groove. A short rod is fixedly installed on one end of the rotating rod, and a card ball is fixedly installed on one end of the short rod. A connecting rod is fixedly installed on the other end of the rotating rod, and a weight block is fixedly installed on one end of the connecting rod. The connecting rod is located on the inner side of the shaking groove, thereby increasing the self-cleaning effect of the device. At the same time, the shaking effect can also assist the sleeve and the sliding rod and the shaking connection process, so that the shaking effect is superimposed, and further increasing the dust shaking effect.

[0016] Preferably, a card block is fixedly installed on the side of the impact block close to the isolation plate, and a blocking plate is rotatably connected to the inner side of the inner groove. A connecting rope and a spring are fixedly connected to the side of the blocking plate away from the impact block. The spring is located on the outside of the connecting rope, and the spring is fixedly connected to the inner wall of the inner groove. A top rod is fixedly installed on the top of the slide rod, and the end of the connecting rope away from the blocking plate is located above the slide rod. Through this design, the impact block can limit the card ball, so that the shaking of the heavy block can directly act on the isolation plate, and the force generated by the heavy block will not be consumed in the swing of the card ball, thereby enhancing the shaking effect of the isolation plate and further enhancing the self-cleaning effect of the device.

[0017] Preferably, a limiting groove is provided at the top of the impact block 1, and the limiting groove is set at a right angle, and the short rod is set in a bent shape. When working, the right-angled limiting groove is matched to allow the impact block 1 to smoothly drive the card ball to move. At the same time, after the impact block 1 is limited, the card ball can be well stuck and not move, and the bent shape of the short rod also corresponds well to the shape of the limiting groove, thereby making the fixing process of the card ball stable. At the same time, after the impact block 1 returns to its position, the card ball can be brought to the center position in combination with the shape of the limiting groove, ensuring that the impact and shaking effect on the next side can proceed normally.

[0018] Preferably, the sleeve is made of metal material, and magnets are fixedly installed on both sides of the top of the slide rod. The magnets are spherical, thereby ensuring the shaking and sliding process of the sleeve and the slide rod, and can effectively shake off the dust on the outside of the transparent mirror, ensuring that the speed measurement line of sight is not blocked. The spherical shape of the magnet can make the adsorption contact surface smaller, preventing the magnet and the sleeve from being adsorbed too strongly, resulting in the problem that the sleeve does not shake.

[0019] Preferably, the cleaning roller includes an inner ratchet and an extrusion ring, a fixed rod is installed in the middle of the inner ratchet, a pawl in the inner ratchet is fixedly connected to the outer side of the fixed rod, and both ends of the fixed rod are fixedly connected to the inner wall of the observation groove, and the extrusion ring is an elastic material. Through this arrangement, the non-rotating cleaning roller can maximize the cleaning effect, allowing the cleaning roller to intercept the cleaned dust and rise above the cleaning roller, preventing the cleaning roller from sweeping the dust downwards during the upward movement of the isolation plate, causing dust to accumulate at the outer bottom of the transparent mirror, resulting in poor cleaning effect.

[0020] Preferably, several groups of infiltration ports are provided on the outside of the extrusion ring, and several groups of sponge balls are fixedly installed on the inside of the extrusion ring. The outside of the extrusion ring is tooth-shaped, and a protective top plate is fixedly installed on the top of the protection box. Two groups of infiltration grooves are provided through the top of the protective top plate, and the bottom end of the infiltration groove is connected to the cleaning roller. When working, the gear-shaped setting of the extrusion ring can well remove the dust on the transparent mirror moving downward, thereby increasing the cleaning effect. When it rains outside, the rainwater can be received through the opening of the infiltration groove, and the opening of the infiltration port on the outside of the extrusion ring can allow the rainwater to be transferred to the sponge ball. Whenever the extrusion ring is squeezed, the rainwater in the sponge ball can be squeezed out to clean the transparent mirror, thereby further increasing the cleaning effect of the transparent mirror.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The radio wave-based automatic speed measuring device for highways described in the present invention has an isolation plate and a rotating fan. When a vehicle passes through waves or strong winds, the airflow can pass through the hood and drive the rotating fan to rotate, and the isolation plate is driven up and down by a linkage component. During the up and down movement of the isolation plate, the isolation plate will rub against the cleaning roller. At the same time, the vibration generated by the isolation plate during the movement can effectively remove the dust on the outside of the isolation plate, thereby realizing the self-cleaning function of the device and ensuring that the device can perform accurate speed measurement for a long time in harsh environments.

[0023] 2. The radio wave-based automatic speed measuring device for highways described in the present invention has a sliding rod and a sleeve. Since the outer diameter of the sliding rod is smaller than the inner diameter of the sleeve, when the isolation plate moves downward under the action of gravity, as long as the isolation plate is offset, the sleeve will be caused to move downward in a left-right shaking manner. The shaking downward movement of the isolation plate not only prolongs the time for the transparent mirror to rub the cleaning roller, thereby increasing the cleaning effect, but also the shaking isolation plate also helps to shake off the dust on the outside of the isolation plate, thereby further increasing the self-cleaning effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 is a perspective view of the present invention;

[0026] Figure 2 is a side sectional view of the protective box of the present invention;

[0027] Figure 3 It is a schematic diagram of the connection between the isolation plate and the rotating fan in the present invention;

[0028] Figure 4 yes Figure 3 A partial enlarged view of the middle part;

[0029] Figure 5 is a side sectional view of the cleaning roller of the present invention;

[0030] In the figure: 1. Protection box; 2. Support frame; 3. Isolation plate; 4. Protection top plate; 5. Infiltration groove; 6. Blowing hood; 7. Rotating fan; 8. Observation groove; 9. Sleeve; 10. Sliding rod; 11. Lifting groove; 12. Radio wave velocimeter body; 14. Cleaning roller; 15. Transparent mirror; 16. Swaying groove; 17. Connecting rod; 18. Weight block; 19. Transmission belt; 20. Connecting rope; 21. Top rod; 22. Magnet; 23. Short rod; 24. Card ball; 25. Rotating rod; 26. Impact block 1; 27. Card block; 28. Blocking plate; 29. ​​Rotating shaft; 30. Impact block 2; 31. Inner ratchet; 32. Extrusion ring; 33. Sponge ball; 261. Limiting groove. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0032] Example 1

[0033] like Figures 1 to 4 As shown, an automatic speed measuring device for a highway based on radio waves according to an embodiment of the present invention includes a protective box 1, a support frame 2 is fixedly mounted on the bottom end of the protective box 1, a radio wave speed meter body 12 is fixedly mounted on the inner side of the protective box 1, and the radio wave speed meter body 12 includes: a radio wave transmitting component and a radio wave receiving component;

[0034] The radio wave transmitting component is used to transmit radio waves, and the radio waves are reflected after hitting the vehicle;

[0035] The radio wave receiving component is used for receiving the reflected radio waves;

[0036] An observation slot 8 and a lifting slot 11 are provided at the front end of the protection box 1. An isolation plate 3 is slidably connected to the inner side of the lifting slot 11. A transparent mirror 15 is fixedly installed in the middle of the isolation plate 3. Two sets of cleaning rollers 14 are rotatably connected to the inner side of the observation slot 8. A blower hood 6 is fixedly installed on one side of the protection box 1. A rotating fan 7 is rotatably connected to the middle inner side of the blower hood 6. A linkage component is provided between the rotating fan 7 and the isolation plate 3. When working, the device is placed on a speed measuring section of a highway, and the speed is measured by the radio wave speed meter body 12. The radio wave speed meter body 12 emits radio waves and then receives the reflected radio waves, and calculates the vehicle speed through time. Some highway sections are built in areas with large dust, and speed meters placed for a long time are not suitable. , it is easy for the line of sight of the radio wave speed meter body 12 to be covered by the dust in the sky, resulting in a series of problems such as inaccurate speed measurement process. If it is cleaned manually, it will take a lot of time. With the setting of the isolation plate 3 and the rotating fan 7, when the vehicle passes through the wind and waves or the strong wind blows head-on, with the setting of the transparent ends of the hood 6, the air flow can pass through the hood 6 and blow the rotating fan 7 to rotate, and the isolation plate 3 is driven up and down by the linkage component. During the up and down movement, the isolation plate 3 will rub against the cleaning roller 14. At the same time, with the vibration generated by the isolation plate 3 during the movement, the dust on the outside of the isolation plate 3 can be effectively removed, thereby realizing the self-cleaning function of the device and ensuring that the device can perform accurate speed measurement for a long time under harsh environments.

[0037] like Figure 2 and Figure 3 As shown, a sleeve 9 is fixedly installed at the bottom end of the isolation plate 3, and a slide rod 10 is fixedly installed at the inner bottom end of the lifting groove 11. The outer side of the slide rod 10 is slidably connected to the inner side of the sleeve 9, and the slide rod 10 and the sleeve 9 are both cylindrical, and the outer diameter of the slide rod 10 is smaller than the inner diameter of the sleeve 9. During operation, when the isolation plate 3 moves up and down, since the outer diameter of the slide rod 10 is smaller than the inner diameter of the sleeve 9, when the isolation plate 3 moves downward under the action of gravity, as long as the isolation plate 3 is offset, the sleeve 9 will move downward with a left and right shaking motion. The shaking downward movement process of the isolation plate 3 can not only prolong the time for the transparent mirror 15 to rub the cleaning roller 14, which can increase the cleaning effect, but also the shaking isolation plate 3 can help to shake off the dust on the outside of the isolation plate 3, thereby further increasing the self-cleaning effect of the device.

[0038] like Figure 3As shown, the rotating fan 7 includes a transmission rod and several groups of fan blades, the linkage assembly includes a transmission belt 19, the inner side of the protection box 1 is rotatably connected to the rotating shaft 29, the transmission rod and the rotating shaft 29 are connected by a transmission belt 19, and the outer side of the rotating shaft 29 is fixedly installed with a collision block 2 30, and one side of the isolation plate 3 is provided with a collision block 1 26, and the collision block 1 26 is located above the collision block 2 30. When working, as the rotating fan 7 rotates, the transmission rod and the transmission belt 19 will be driven to rotate, and then the rotating shaft 29 and the collision block 2 30 will be driven to rotate. After the collision block 2 30 rotates to the horizontal position It will collide with the impact block 26, causing the isolation plate 3 to slide upwards. After moving to the top, it will slide downwards due to gravity, thereby realizing the linkage function of the rotating fan 7 and the isolation plate 3. Since the impact block 26 is located on one side of the isolation plate 3, the effect of the collision will cause the isolation plate 3 to shift to the other side, causing the isolation plate 3 to become slightly tilted. The tilted isolation plate 3 will cause the sleeve 9 to be in a tilted state as well, causing the slide rod 10 and the sleeve 9 to be in a relatively tilted state, which can assist the sleeve 9 in a swinging motion during the falling process, thereby further enhancing the self-cleaning effect of the isolation plate 3.

[0039] like Figure 4 As shown, one side of the isolation plate 3 is provided with an inner groove, one end of the impact block 1 26 is located on the inner side of the inner groove, and the other end of the impact block 1 26 is movably installed with a first rotating rod, and the two ends of the first rotating rod are fixedly connected to the inner side of the isolation plate 3, and a torsion spring is fixedly installed between the first rotating rod and the impact block 1 26. When working, as the impact block 1 26 collides with the impact block 2 30, the torsion spring can be used to rotate the impact block 1 26. Due to the elastic potential energy of the torsion spring, when the impact force is small, the impact force will be normally transmitted to the isolation plate 3, allowing the isolation plate 3 to move up and down slightly. When the impact force is too large, the impact block 1 26 will bend to a right angle. At this time, the impact The force generated by the impact will just make the isolation plate 3 move to the top of the lifting slot 11. After the impact occurs, the reaction force of the torsion spring will make the impact block 1 26 return to its position quickly, ensuring that the next impact can be carried out normally. Through the setting of impact and bending, it can be prevented that when the wind force is too strong, the impact potential energy of the impact block 2 30 is too large, and the isolation plate 3 is lifted up too high, causing the top of the isolation plate 3 to hit the inner wall of the protection box 1, causing damage to the isolation plate 3 and the protection box 1. At the same time, with the setting of the torsion spring, it can also prevent the impact block 2 30 from rigidly colliding with the impact block 1 26 for a long time, which may easily cause damage to the impact block 2 30 and the impact block 1 26, thereby improving the service life of the device.

[0040] like Figure 3 and Figure 4As shown, a shaking groove 16 is provided on one side of the isolation plate 3, and the shaking groove 16 is located above the inner groove. A rotating rod 25 is rotatably connected to one side of the isolation plate 3, and the rotating rod 25 is located between the shaking groove 16 and the inner groove. A short rod 23 is fixedly installed on one end of the rotating rod 25, and a card ball 24 is fixedly installed on one end of the short rod 23. A connecting rod 17 is fixedly installed on the other end of the rotating rod 25, and a weight block 18 is fixedly installed on one end of the connecting rod 17. The connecting rod 17 is located on the inner side of the shaking groove 16. During operation, when the impact block 26 is hit and rotated, the impact block 26 will hit the card ball 24 during the rotation, and the card ball 24 is connected to the connecting rod 17 through the short rod 23, the rotating rod 25 and the connecting rod 17. The weight block 18 is connected, causing the card ball 24 to drive the weight block 18 to shake at the top after being squeezed to one side. Since the length of the short rod 23 is much smaller than the length of the connecting rod 17, combined with the lever principle, the weight block 18 obtains a larger shaking potential energy, allowing the weight block 18 to shake repeatedly, and the shaking potential energy will be transmitted to the isolation plate 3 as a whole, causing the isolation plate 3 to shake as a whole, which can not only further increase the friction between the transparent mirror 15 and the cleaning roller 14, but also shake off the dust on the outside of the transparent mirror 15, thereby increasing the self-cleaning effect of the device. At the same time, the shaking effect can also assist the sleeve 9 and the slide rod 10 in the shaking connection process, allowing the shaking effect to be superimposed, further increasing the dust shaking effect.

[0041] like Figure 4 As shown, a clamping block 27 is fixedly installed on the side of the impact block 26 close to the isolation plate 3, and a blocking plate 28 is rotatably connected to the inner side of the inner groove. A connecting rope 20 and a spring are fixedly connected to the side of the blocking plate 28 away from the impact block 26. The spring is located on the outside of the connecting rope 20, and the spring is fixedly connected to the inner wall of the inner groove. A top rod 21 is fixedly installed on the top of the slide bar 10, and one end of the connecting rope 20 away from the blocking plate 28 is located above the slide bar 10. During operation, when the impact force applied to the impact block 26 is too large, causing the impact block 26 to rotate to a right angle state, the block 27 will be blocked by the arrangement of the clamping block 27 and the blocking plate 28. The plate 28 is stuck, allowing the impact block 26 to remain in a right-angle state. At the same time, in conjunction with the setting of the top rod 21, when the slide bar 10 is fully returned to its position, the top rod 21 at the top of the slide bar 10 will squeeze the connecting rope 20 upward, causing the blocking plate 28 to be pulled downward, so that the blocking plate 28 cannot block the blocking block 27. At this time, in conjunction with the reaction force of the torsion spring, the impact block 26 can be quickly returned to its position. Through this design, the impact block 26 can restrict the blocking ball 24, so that the shaking of the weight block 18 can directly act on the isolation plate 3, and the force generated by the weight block 18 will not be consumed in the swing of the blocking ball 24, thereby enhancing the shaking effect of the isolation plate 3 and further enhancing the self-cleaning effect of the device.

[0042] like Figure 4As shown, a limiting groove 261 is provided at the top of the impact block 26, and the limiting groove 261 is set at a right angle, and the short rod 23 is set in a bent shape. When working, the right-angled limiting groove 261 is matched to allow the impact block 26 to smoothly drive the card ball 24 to move. At the same time, after the impact block 26 is limited, the card ball 24 can be well stuck and prevented from moving. The bent shape of the short rod 23 also corresponds well to the shape of the limiting groove 261, thereby making the fixing process of the card ball 24 stable. At the same time, after the impact block 26 returns to its position, the card ball 24 can be brought to the center position in combination with the shape setting of the limiting groove 261, ensuring that the impact and shaking effect on the next side can proceed normally.

[0043] like Figure 2 and Figure 3 As shown, the sleeve 9 is made of metal material, and magnets 22 are fixedly installed on both sides of the top of the slide bar 10. The magnets 22 are spherical. During operation, as the slide bar 10 moves inside the sleeve 9, the isolation plate 3 shakes, causing the sleeve 9 to slide with the slide bar 10 in a swinging manner. At this time, with the setting of the magnet 22, when the top side of the slide bar 10 is close to the sleeve 9, the end of the slide bar 10 will be adsorbed with the sleeve 9. Then, due to the overall gravity of the isolation plate 3, the sleeve 9 will continue to sink, allowing the isolation plate 3 and the sleeve 9 to swing to the other side, thereby ensuring the shaking and sliding process of the sleeve 9 and the slide bar 10, which can effectively shake off the dust on the outside of the transparent mirror 15 and ensure that the speed measurement line of sight is not blocked. The spherical shape of the magnet 22 can make the adsorption contact surface smaller, preventing the magnet 22 from being too adsorbed with the sleeve 9, resulting in the problem that the sleeve 9 does not shake.

[0044] Example 2

[0045] like Figure 5As shown, in contrast to Example 1, another embodiment of the present invention is as follows: the cleaning roller 14 includes an inner ratchet 31 and an extrusion ring 32, a fixed rod is provided in the middle of the inner ratchet 31, a pawl in the inner ratchet 31 is fixedly connected to the outer side of the fixed rod, and both ends of the fixed rod are fixedly connected to the inner wall of the observation groove 8, and the extrusion ring 32 is made of elastic material. When working, as the extrusion ring 32 contacts the transparent mirror 15, the elastic material setting of the extrusion ring 32 allows the extrusion ring 32 to be squeezed to a flat state, thereby increasing the cleaning effect of the cleaning roller 14, and the inner ratchet 31 is fixedly connected to the outer side of the fixed rod. The setting of the wheel 31 allows the cleaning roller 14 to rotate only clockwise, so that when the isolation plate 3 moves upward, the cleaning roller 14 will rotate, and when the isolation plate 3 descends, the cleaning roller 14 will stop rotating. Through this setting, the non-rotating cleaning roller 14 can maximize the cleaning effect, allowing the cleaning roller 14 to intercept the cleaned dust and rise above the cleaning roller 14, preventing the cleaning roller 14 from sweeping the dust downward during the upward movement of the isolation plate 3, causing dust to accumulate at the outer bottom of the transparent mirror 15, resulting in poor cleaning effect.

[0046] like Figure 5 As shown, several groups of penetration ports 100 are provided on the outside of the extrusion ring 32, and several groups of sponge balls 33 are fixedly installed on the inside of the extrusion ring 32. The outer side of the extrusion ring 32 is toothed, and a protective top plate 4 is fixedly installed on the top of the protection box 1. Two groups of penetration grooves 5 are provided through the top of the protective top plate 4. The bottom end of the penetration groove 5 is connected to the cleaning roller 14. When working, the gear-shaped setting of the extrusion ring 32 can well remove the dust on the downward moving transparent mirror 15, thereby increasing the cleaning effect. When it rains outside, the rainwater can be received by opening the penetration groove 5, and the rainwater can be transferred to the sponge ball 33 by opening the penetration port 100 on the outside of the extrusion ring 32. Whenever the extrusion ring 32 is squeezed, the rainwater in the sponge ball 33 can be squeezed out to clean the transparent mirror 15, thereby further increasing the cleaning effect of the transparent mirror 15.

[0047] When working, the device is placed on the speed measuring section of the highway, and the speed is measured through the radio wave speed meter body 12. The radio wave speed meter body 12 emits radio waves, then receives the reflected radio waves, and calculates the vehicle speed through time. Some highway sections are built in areas with large dust. The speed meter placed for a long time is easily covered by the dust in the sky, which blocks the sight of the radio wave speed meter body 12, resulting in a series of problems such as inaccurate speed measurement process. If it is cleaned manually, it will take a lot of time. With the setting of the isolation plate 3 and the rotating fan 7, when the vehicle passes by the wind and waves or the wind blows head-on, the speed meter will be cleared. When strong winds come, with the transparent setting at both ends of the blast hood 6, air can pass through the blast hood 6 and blow the rotating fan 7 to rotate, driving the isolation plate 3 to move up and down through the linkage component. During the up and down movement of the isolation plate 3, it will rub against the cleaning roller 14. At the same time, with the vibration generated by the isolation plate 3 during the movement, the dust on the outside of the isolation plate 3 can be effectively removed, thereby realizing the self-cleaning function of the device and ensuring that the device can perform accurate speed measurement for a long time in harsh environments. During operation, when the isolation plate 3 moves up and down, since the outer diameter of the slide rod 10 is smaller than the inner diameter of the sleeve 9, the isolation plate 3 When the plate 3 moves downward under the action of gravity, as long as the isolation plate 3 is offset, the sleeve 9 will be caused to move downward with a left-right shaking motion. The shaking downward movement process of the isolation plate 3 can not only prolong the time for the transparent mirror 15 to rub the cleaning roller 14, thereby increasing the cleaning effect, but also the isolation plate 3 in a shaking state can help to shake off the dust on the outside of the isolation plate 3, thereby further increasing the self-cleaning effect of the device. When working, as the rotating fan 7 rotates, it will drive the transmission rod and the transmission belt 19 to rotate, and then drive the rotating shaft 29 and the impact block 2 30 to rotate. After rotating to the horizontal position, the impact block 2 30 will rotate with the The impact block 1 26 collides, causing the isolation plate 3 to slide upward, and after moving to the top, it will slide downward due to gravity, thereby realizing the linkage function of the rotating fan 7 and the isolation plate 3. Moreover, since the impact block 1 26 is located on one side of the isolation plate 3, the effect of the impact will cause the isolation plate 3 to deviate to the other side, causing the isolation plate 3 to become a slightly tilted state. The tilted isolation plate 3 will cause the sleeve 9 to be in a tilted state as well, so that the slide rod 10 and the sleeve 9 are in a relatively tilted state, which can assist the swinging movement of the sleeve 9 during the falling process, thereby further enhancing the self-cleaning effect of the isolation plate 3.During operation, as the impact block 1 26 collides with the impact block 2 30, the torsion spring setting can make the impact block 1 26 rotate. Due to the elastic potential energy of the torsion spring, when the impact force is small, the impact force will be normally transmitted to the isolation plate 3, allowing the isolation plate 3 to move up and down slightly. When the impact force is too large, the impact block 1 26 will bend to a right angle. At this time, the force generated by the impact will just make the isolation plate 3 move to the top of the lifting slot 11. After the impact occurs, the reaction force of the torsion spring will make the impact block 1 26 return to its position quickly, ensuring that the next impact can proceed normally. The impact and bending settings can prevent the impact potential energy of the impact block 2 30 from being too large when the wind force is too strong, thereby lifting the isolation plate 3 upward. The height is too high, causing the top of the isolation plate 3 to hit the inner wall of the protection box 1, causing damage to the isolation plate 3 and the protection box 1. At the same time, the setting of the torsion spring can also prevent the impact block 2 30 from rigidly impacting the impact block 1 26 for a long time, which can easily cause damage to the impact block 2 30 and the impact block 1 26, thereby improving the service life of the device; during operation, when the impact block 1 26 is hit and rotated, the impact block 1 26 will hit the card ball 24 during the rotation. The card ball 24 is connected to the weight block 18 through the short rod 23, the rotating rod 25 and the connecting rod 17, causing the card ball 24 to be squeezed to one side, which will drive the weight block 18 to shake at the top. Since the length of the short rod 23 is much smaller than the length of the connecting rod 17 The degree, combined with the lever principle, makes the heavy block 18 obtain a large shaking potential energy, so that the heavy block 18 can be repeatedly shaken, and the shaking potential energy will be transmitted to the isolation plate 3 as a whole, causing the isolation plate 3 to shake as a whole, which can not only further increase the friction between the transparent mirror 15 and the cleaning roller 14, but also shake off the dust on the outside of the transparent mirror 15, thereby increasing the self-cleaning effect of the device. At the same time, the shaking effect can also assist the sleeve 9 and the slide rod 10 in the shaking connection process, allowing the shaking effect to be superimposed, further increasing the dust shaking effect; during operation, when the impact force received by the impact block 26 is too large, causing the impact block 26 to rotate to a right angle state, at this time, combined with the setting of the card block 27 and the blocking plate 28, it will lead to The blocking plate 28 is pulled downwards, and the blocking plate 28 cannot block the blocking block 27. At this time, the reaction force of the torsion spring can make the impact block 26 return to its original position quickly. Through this design, the impact block 26 can limit the card ball 24, so that the shaking of the weight block 18 can directly act on the isolation plate 3, and the force generated by the weight block 18 will not be consumed in the swing of the card ball 24, thereby enhancing the shaking effect of the isolation plate 3 and further enhancing the self-cleaning effect of the device.During operation, with the setting of the right-angled limiting groove 261, the impact block 26 can smoothly drive the card ball 24 to move. At the same time, after the impact block 26 is limited, the card ball 24 can be well stuck and not move. The bent shape of the short rod 23 also corresponds well to the shape of the limiting groove 261, so that the fixing process of the card ball 24 becomes stable. At the same time, after the impact block 26 returns to its position, with the shape setting of the limiting groove 261, the card ball 24 can be brought to the center position, ensuring that the impact and shaking effect on the next side can be carried out normally. During operation, as the slide bar 10 moves inside the sleeve 9, the isolation plate 3 shakes The spherical shape of the magnet 22 can reduce the contact surface of the adsorption and prevent the magnet 22 from being too strong in adsorption with the sleeve 9, thereby preventing the sleeve 9 from shaking. Problem: During operation, as the extrusion ring 32 contacts the transparent mirror 15, the elastic material setting of the extrusion ring 32 allows the extrusion ring 32 to be squeezed to a flat state, thereby increasing the cleaning effect of the cleaning roller 14, and the setting of the inner ratchet 31 allows the cleaning roller 14 to only rotate clockwise, so that when the isolation plate 3 moves upward, the cleaning roller 14 will rotate, and when the isolation plate 3 drops, the cleaning roller 14 will stop rotating. Through this setting, the non-rotating cleaning roller 14 can maximize the cleaning effect, allowing the cleaning roller 14 to intercept the cleaned dust above the cleaning roller 14 and prevent the isolation plate 3 from rising during the upward movement The cleaning roller 14 sweeps dust downward, causing it to accumulate on the outer bottom of the transparent mirror 15, resulting in poor cleaning performance. During operation, the gear-shaped arrangement of the extrusion ring 32 effectively removes dust from the downwardly moving transparent mirror 15, thereby enhancing the cleaning effect. When it rains, the infiltration groove 5 receives rainwater, which, combined with the infiltration opening 100 on the outer side of the extrusion ring 32, allows rainwater to pass to the sponge ball 33. Whenever the extrusion ring 32 is squeezed, rainwater is squeezed out of the sponge ball 33 and used to clean the transparent mirror 15, further enhancing the cleaning effect of the transparent mirror 15.

[0048] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0050] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A radio-wave-based automatic speed measurement device for highways, characterized by: The invention comprises a protection box (1), a support frame (2) is fixedly mounted on the bottom end of the protection box (1), a radio wave speed meter body (12) is fixedly mounted on the inner side of the protection box (1), and the radio wave speed meter body (12) comprises: a radio wave transmitting component and a radio wave receiving component; The radio wave transmitting component is used to transmit radio waves, and the radio waves are reflected after hitting the vehicle; The radio wave receiving component is used for receiving the reflected radio waves; The front end of the protection box (1) is provided with an observation slot (8) and a lifting slot (11), the inner side of the lifting slot (11) is slidably connected to an isolation plate (3), the middle part of the isolation plate (3) is fixedly mounted with a transparent mirror (15), the inner side of the observation slot (8) is rotatably connected to two sets of cleaning rollers (14), a blower hood (6) is fixedly mounted on one side of the protection box (1), the inner middle part of the blower hood (6) is rotatably connected to a rotating fan (7), and a linkage assembly is provided between the rotating fan (7) and the isolation plate (3); A sleeve (9) is fixedly mounted on the bottom end of the isolation plate (3), and a slide rod (10) is fixedly mounted on the inner bottom end of the lifting groove (11). The outer side of the slide rod (10) is slidably connected to the inner side of the sleeve (9), and the slide rod (10) and the sleeve (9) are both cylindrical, and the outer diameter of the slide rod (10) is smaller than the inner diameter of the sleeve (9); The rotating fan (7) includes a transmission rod and a plurality of fan blades, the linkage assembly includes a transmission belt (19), the inner side of the protection box (1) is rotatably connected to a rotating shaft (29), a transmission belt (19) is connected between the transmission rod and the rotating shaft (29), and a second impact block (30) is fixedly installed on the outer side of the rotating shaft (29), and a first impact block (26) is provided on one side of the isolation plate (3), and the first impact block (26) is located above the second impact block (30); An inner groove is provided on one side of the isolation plate (3), one end of the impact block (26) is located inside the inner groove, and a first rotating rod is movably mounted on the other end of the impact block (26), both ends of the first rotating rod are fixedly connected to the inner side of the isolation plate (3), and a torsion spring is fixedly mounted between the first rotating rod and the impact block (26); A shaking groove (16) is provided on one side of the isolation plate (3), and the shaking groove (16) is located above the inner groove. A rotating rod (25) is rotatably connected to one side of the isolation plate (3), and the rotating rod (25) is located between the shaking groove (16) and the inner groove. A short rod (23) is fixedly installed on one end of the rotating rod (25), and a clamping ball (24) is fixedly installed on one end of the short rod (23). A connecting rod (17) is fixedly installed on the other end of the rotating rod (25), and a weight block (18) is fixedly installed on one end of the connecting rod (17). The connecting rod (17) is located on the inner side of the shaking groove (16); A clamping block (27) is fixedly installed on the side of the impact block (26) close to the isolation plate (3), and a blocking plate (28) is rotatably connected to the inner side of the inner groove. A connecting rope (20) and a spring are fixedly connected to the side of the blocking plate (28) away from the impact block (26), and the spring is located on the outside of the connecting rope (20). The spring is fixedly connected to the inner wall of the inner groove, and a top rod (21) is fixedly installed on the top of the slide rod (10), and the end of the connecting rope (20) away from the blocking plate (28) is located above the slide rod (10); A limiting groove (261) is provided at the top of the impact block (26), the limiting groove (261) is arranged in a right angle, and the short rod (23) is arranged in a bent shape.

2. The automatic speed measurement device for highways based on radio waves according to claim 1, characterized in that: The sleeve (9) is made of metal material, and magnets (22) are fixedly mounted on both sides of the top end of the slide rod (10), and the magnets (22) are spherical.

3. The radio wave-based automatic speed measurement device for highways according to claim 1, characterized in that: The cleaning roller (14) comprises an inner ratchet (31) and an extrusion ring (32). A fixing rod is provided in the middle of the inner ratchet (31). A pawl in the inner ratchet (31) is fixedly connected to the outer side of the fixing rod. Both ends of the fixing rod are fixedly connected to the inner wall of the observation groove (8). The extrusion ring (32) is made of elastic material.

4. The automatic speed measurement device for highways based on radio waves according to claim 3, characterized in that: The outer side of the extrusion ring (32) is provided with a plurality of groups of penetration openings (100), and the inner side of the extrusion ring (32) is fixedly provided with a plurality of groups of sponge balls (33). The outer side of the extrusion ring (32) is arranged in a toothed shape. A protective top plate (4) is fixedly provided on the top of the protection box (1). Two groups of penetration grooves (5) are provided through the top of the protective top plate (4), and the bottom ends of the penetration grooves (5) are connected to the cleaning roller (14).

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