An intelligent transportation speed limit device and its control method

Abstract

The present invention discloses an intelligent transportation speed limit device and its control method, including: a base, rollers, a damping component, a locking brake component, a speed measurement component, a rotary encoder, and a data processor; characterized in that: the rollers are installed on the base through bearings; the rotary encoder, the damping component, and the locking brake component are all installed on the rollers; the data processor is electrically connected to the rotary encoder, the speed measurement component, and the locking brake component respectively. The present invention is modularly produced and installed, which is beneficial for maintenance and can flexibly increase or decrease the area of the paved road surface; it can effectively perform intelligent speed limit on vehicles and reduce the risk of accidents.

Description

Technical Field

[0001] The present invention relates to the field of traffic devices, and specifically to an intelligent traffic speed limit device and its control method. Background Art

[0002] At present, at traffic intersections on roads, whether it is for vehicle interaction or vehicle-person interaction, traffic signals are mostly used to restrict the traffic behaviors of vehicles and pedestrians. However, this way of the electronic traffic lights emitting light to the human eye and then the human brain realizing and deciding the traffic behavior actions is not sufficient to reduce and prevent traffic accidents. The prevention strategy relying on personal awareness control is difficult to ensure full adaptation to the complexity of traffic.

[0003] Sometimes, even if traffic participants see the status of traffic signals, due to absent-mindedness or deliberately running a red light, etc., they will not stop the vehicle in time, thus causing traffic accidents. Summary of the Invention

[0004] The present invention mainly solves the problems existing in the prior art, and provides a device capable of effectively limiting the speed of vehicles and its control method.

[0005] The present invention is realized through the following technologies:

[0006] An intelligent traffic speed limit device can form a speed limit module by installing multiple speed limit devices in a parallel or staggered installation manner, and then install the speed limit module on the road in a matrix or staggered installation manner; through this modular installation, it is possible to quickly adjust the number and position of speed limit devices according to different intersection conditions, and flexibly increase or decrease the paved road surface area.

[0007] The speed limit device includes: a base, a roller, a damping component, a brake locking component, a speed measurement component, a rotary encoder, and a data processor;

[0008] The bottom of the base is provided with a drain hole, which can drain the accumulated water on the road surface in time to prevent the accumulated water from affecting the operation of the speed limit device;

[0009] The roller is installed on the base through a bearing to ensure that the roller can rotate on the base; both ends of the roller extend to the outside of the base; the surface of the roller is evenly distributed with bumps to increase the friction between the roller and the vehicle;

[0010] The damping component is installed on one side of the roller to limit the rotation of the roller; the damping component includes: a disc, an iron core, and a coil; the disc is installed on the roller, the iron cores are evenly installed on the periphery of the disc, and the coil is wound around the iron cores; after the coil is powered on, a magnetic force will be generated at the iron cores, and then the disc will generate damping to slow down the roller and prevent the roller from rotating too fast;

[0011] The rotary encoder is installed on the side of the roller and is connected to the roller through a gear. When the roller rotates due to being crushed by the target vehicle, the rotary encoder can collect the rotation direction and speed of the roller, and then convert them into vehicle operation information, which is transmitted to the data processor to determine the vehicle operation status.

[0012] The braking component includes: a braking wheel, a stator housing, a permanent magnet core winding, and a permanent magnet core. The braking wheel is installed at the other end of the roller, and the stator housing is arranged radially outside the braking wheel. The permanent magnet cores are evenly arranged on the inner wall of the stator housing and correspond to the braking wheel. The permanent magnet core winding is wound around the permanent magnet core. The magnetic field axis generated by the permanent magnet core winding coincides with the magnetic field axis of the permanent magnet core. Under the action of the magnetic field, the braking wheel cannot rotate, and thus the roller stops rotating. When the permanent magnet core winding is powered on, the magnetic field generated by the permanent magnet core winding cancels out the magnetic field of the permanent magnet core, and the braking wheel can rotate with the roller.

[0013] The braking component further includes: a power generation stator core and a power generation stator coil. A power generation rotor permanent magnet is arranged outside the braking wheel. The power generation stator cores are evenly arranged on the inner wall of the stator housing, the power generation stator coil is wound around the power generation stator core, and the power generation rotor permanent magnet corresponds to the power generation stator core, forming a small generator. The generated electric energy can be collected for use by the braking component or for an externally connected sound and light alarm device to remind the vehicles in front and behind to pay attention.

[0014] The speed measurement component is one of a position and weight sensor or an optical wave speedometer.

[0015] When the speed measurement component uses a position and weight sensor, the position and weight sensor is installed at the bottom of the bearing, and can react in time when the moving vehicle touches the roller, recording the speed and position information of the moving vehicle.

[0016] The optical wave speedometer is installed on the road through a gantry, and the optical wave speedometer obtains the instantaneous speed and position information of the moving vehicle.

[0017] The data processor is electrically connected to the rotary encoder, the speed measurement component, and the braking component respectively, receives the information transmitted by the traffic signal light, the rotary encoder, and the speed measurement component, and then controls the action of the braking component as needed.

[0018] The control method of the intelligent traffic speed limit device is as follows:

[0019] When the target vehicle enters the speed limit area, the speed measurement component will collect the position, speed, and initial time information of the target vehicle, and then transmit this information to the data processor.

[0020] When the target vehicle crushes the first roller, the roller rotates under force, and the rotary encoder transmits the rotation direction and speed information of the roller to the data processor.

[0021] Then, starting from when the target vehicle rolls over the second roller, the following steps are repeated continuously until the target vehicle leaves;

[0022] In addition to collecting information such as the position, speed, triggering time, and operating status of the vehicle, the data processor will also collect traffic signal information; then, according to the time - distance model formula: SS = TL v0 + △S, it calculates the distance from the traffic signal and the safe distance between the front and rear vehicles, so as to determine whether the target vehicle needs speed limit; where SS is the safe vehicle distance; TL is the time - distance, which is related to the driver's reaction time, reaction time, and the time when the brake takes effect during the vehicle braking process; v0 is the speed of the vehicle in front; △S is the distance maintained from the vehicle in front when braking to a stop;

[0023] If it is determined that speed limit is required, the data processor sends a control signal to the lock - brake component. The lock - brake component restricts the rotation direction of the roller, so that the vehicle can only obtain a backward braking force from the roller and cannot obtain a forward force; and through the damping component, it assists the lock - brake component to jointly restrict the frequency and time of the rotation direction of the roller, enabling intelligent speed limit for the target vehicle;

[0024] If it is determined that speed limit is not required, the information is transmitted to the data processor. The data processor then sends a signal to the lock - brake component, and the lock - brake component immediately restricts the rotation of the roller, making the roller in a stationary state and not affecting the driving of the target vehicle.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1. The present invention can effectively perform intelligent speed limit on vehicles and reduce the risk of accidents;

[0027] 2. The present invention adopts modular production, installation, and control, which is conducive to maintenance, can flexibly increase or decrease the area of the paved road surface, and only performs speed - limit control on the target vehicle;

[0028] 3. Installed in a staggered manner, it can effectively prevent the wheels from forming a linear step due to the horizontal gap, ensuring the smoothness of vehicle driving;

[0029] 4. The present invention can be connected with networking technology, serve as a terminal execution platform for intelligent transportation, and be installed in the middle section of the road according to the road conditions, so as to perform overall intelligent regulation on the traffic flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is the structural schematic diagram of the present invention Figure 1 .

[0031] Figure 2 is the structural schematic diagram of the present invention Figure 2 .

[0032] Figure 3 This is a schematic structural diagram of the lock and brake component of the present invention.

[0033] Figure 4 This is a schematic diagram showing the connection of the control system of the present invention.

[0034] Figure 5 This is the installation schematic of the present invention Figure 1 .

[0035] Figure 6 This is the installation schematic of the present invention Figure 2 .

[0036] Figure 7 This is the traffic light time segmentation diagram of the present invention.

[0037] Meanings of reference numerals: 1, base; 2, roller; 3, damping component; 301, disc; 302, iron core; 303, coil; 4, lock and brake component; 401, lock and brake wheel; 402, stator housing; 403, permanent magnet core winding; 404, permanent magnet core; 405, power generation stator iron core; 406, power generation stator coil; 407, power generation rotor permanent magnet; 5, speed measurement component; 6, rotary encoder; 7, data processor. Detailed implementation manners

[0038] In order to make the technical solutions, objectives and advantages of the present invention clearer and more understandable, the present invention will be further explained below with reference to the accompanying drawings and embodiments.

[0039] As Figures 1-6 , an intelligent traffic speed limit device can form a speed limit module by installing multiple speed limit devices in a parallel or staggered manner, and then install the speed limit module on the road in a matrix or staggered manner; through this modular installation, the number and position of the speed limit devices can be quickly adjusted according to different intersection conditions, and the area of the paved road surface can be flexibly increased or decreased.

[0040] The speed limit device includes: a base 1, a roller 2, a damping component 3, a lock and brake component 4, a speed measurement component 5, a rotary encoder 6 and a data processor 7;

[0041] The bottom of the base 1 is provided with a drain hole, which can timely drain the accumulated water on the road surface to prevent the accumulated water from affecting the operation of the speed limit device; semi-circular installation grooves are provided on the end faces at both ends of the base 1;

[0042] The roller 2 is installed on the installation groove of the base 1 through a journal bearing, which can prevent the roller 2 from shifting when being crushed by a vehicle and ensure that the roller 2 can rotate on the base; both ends of the roller 2 extend to the outside of the base; convex points are evenly distributed on the surface of the roller 2 to increase the friction between the roller 2 and the vehicle;

[0043] Damping assembly 3 is mounted on one side of roller 2 to limit the roller's rotation. It comprises a disc 301, an iron core 302, and a coil 303. Disc 301 is mounted on roller 2 and rotates with it. Iron core 302 is mounted on the outer diameter of disc 301 on either side, and coil 303 is wound around it. When coil 303 is energized, it generates opposing magnetic forces on iron core 302, which in turn damps disc 301, slowing roller 2 and preventing it from rotating too quickly.

[0044] The rotary encoder 6 is mounted on the side of the roller 2 and is connected to the roller 2 via a gear. When the roller is rotated by the target vehicle, the rotary encoder 6 can collect the rotation direction and speed of the roller 2, and then convert it into vehicle operation information, which is transmitted to the data processor 7 for determining the vehicle operation status.

[0045] The brake assembly 4 includes a brake wheel 401, a stator housing 402, a permanent magnet core winding 403, and a permanent magnet core. The brake wheel 401 is mounted on the other end of the roller 2, and the stator housing 402 is arranged radially outside the brake wheel 401. The permanent magnet core 404 is made of a permanent magnet with high coercive force and is evenly arranged on the stator housing 402. on the inner wall thereof, corresponding to the locking brake wheel 401; the permanent magnet core winding 403 is wound on the permanent magnet core 404; the axis of the magnetic field generated by the permanent magnet core winding 403 coincides with the axis of the magnetic field of the permanent magnet core 404. Under the action of the magnetic field of the permanent magnet core 404, the locking brake wheel 401 cannot rotate, thereby stopping the rotation of the roller 2; when the permanent magnet core winding 403 is energized, the permanent magnet core winding 403 can generate a magnetic field that is identical to or opposite to the magnetic field of the permanent magnet core 404; when the magnetic field is identical to the magnetic field of the permanent magnet core 404, the magnetic force of the magnetic field of the permanent magnet core 404 is enhanced, the locking brake force is stronger, and the rotation of the roller 2 is restricted; when the magnetic field is opposite to the magnetic field of the permanent magnet core 404, the magnetic force of the magnetic field of the permanent magnet core 404 is offset, and the locking brake wheel 401 can rotate with the roller 2;

[0046] The brake assembly 4 further includes: a generator stator core 405 and a generator stator coil 406. A generator rotor permanent magnet 407 is provided on the outside of the brake wheel 401. The generator stator core 405 is evenly arranged on the inner wall of the stator housing 402. The generator stator coil 406 is wound around the generator stator core 405. The generator rotor permanent magnet 407 corresponds to the generator stator core 405, forming a small generator. The generated electrical energy can be collected for use by the brake assembly 4 or for use by an external sound and light alarm device to alert vehicles in front and behind.

[0047] The speed measurement component 5 uses position and weight sensors: The position and weight sensors are installed at the bottom of the bearing of the axle bush, and can react in time when the moving vehicle touches the roller 2, recording the speed and position information of the moving vehicle;

[0048] The data processor 7 is electrically connected to the rotary encoder 6, the speed measurement component 5 and the locking brake component 4 respectively, receives the information transmitted by the traffic signal lamp, the rotary encoder 6 and the speed measurement component 5, and then controls the action of the locking brake component 4 according to the need.

[0049] The control method of the intelligent traffic speed limit device is as follows:

[0050] When the target vehicle enters the speed limit area, the position and weight sensors will collect the position, speed and initial time information of the target vehicle, and then transmit this information to the data processor 7;

[0051] When the target vehicle presses on the first roller 2, the roller 2 rotates under force, and the rotary encoder 6 transmits the rotation direction and rotation speed information of the roller 2 to the data processor 7;

[0052] Then, starting from when the target vehicle presses on the second roller 2, the following steps will be repeated continuously until the target vehicle leaves;

[0053] In addition to collecting the position, speed, triggering time and vehicle operation status information of the vehicle, the data processor 7 will also collect traffic signal lamp information; then according to the time-distance model formula: SS = T L v0 + △S calculates the distance from the traffic signal lamp and the safe distance between the front and rear vehicles, so as to judge whether the target vehicle needs to be speed-limited; where SS is the safe vehicle distance; T L is the time-distance, which is related to the driver's reaction time, reaction time, and the time when the brake takes effect during the vehicle braking process; v0 is the speed of the vehicle in front; △S is the distance maintained from the vehicle in front when braking to a stop;

[0054] Compare the safe vehicle distance calculated by the time-distance model formula with the pre-set safe vehicle distance to judge whether speed limitation is required;

[0055] At the same time, let the traffic light time be 0 ≤ t x ≤ R, where the green light time is set to 0 - G (0 - g is the green light always on, g - G is the green light flashing), the yellow light time is set to G - Y, and the red light time is set to Y - R; let the farthest distance of the target vehicle from the traffic light stop line be S m, and let the maximum vehicle speed value v of the target vehicle at the traffic light m , as Figure 7 shown:

[0056] When 0 ≤ t x <G, g<G, and the distance of the target vehicle from the traffic light stop line is Sm (t x - g) / (G - g) < S x ≤ S m , then the maximum speed v of the target vehicle x = v m ;

[0057] When g ≤ t x ≤ G, g < G, and the distance of the target vehicle from the stop line of the traffic light is 0 ≤ S x ≤ S m (t x - g) / (G - g), the maximum speed v of the target vehicle x = v m (G - t x ) / (G - g);

[0058] When G < t x ≤ R, 0 < S m , and the distance of the target vehicle from the stop line of the traffic light is 0 ≤ S x ≤ S m when, the maximum speed v of the target vehicle x = v m S x / S m ;

[0059] Compare the speed of the target vehicle with the maximum speed value of the vehicle to determine whether speed limit is required;

[0060] If one of the judgments requires speed limit, the data processor 7 sends a control signal to the lock brake component 4. The lock brake component 4 makes the vehicle only obtain a backward braking force from the roller 2 by restricting the rotation direction of the roller 2, and cannot obtain a forward force; and the damping component 3 assists the lock brake component 4 to jointly limit the frequency and time of the rotation direction of the roller 2 to make the target vehicle intelligently speed - limited;

[0061] If neither of the two judgments requires speed limit, the information is transmitted to the data processor 7. The data processor 7 then sends a signal to the lock brake component 4, and the lock brake component 4 immediately restricts the rotation of the roller 2 to make the roller 2 in a stationary state, which will not affect the driving of the target vehicle.

[0062] The above - mentioned embodiments are only for illustrating the technical concept and characteristics of the present invention. Its purpose is to enable ordinary technicians in the field to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the essence of the content of the present invention should be covered within the protection scope of the present invention.

Claims

1. An intelligent traffic speed limiting device, comprising: A base, a roller, a damping assembly, a locking brake assembly, a speed measuring assembly, a rotary encoder, and a data processor; characterized in that: the roller is mounted on the base via a bearing; the rotary encoder, the damping assembly, and the locking brake assembly are all mounted on the roller; and the data processor is electrically connected to the rotary encoder, the speed measuring assembly, and the locking brake assembly, respectively; A plurality of the speed limiting devices are arranged in parallel or staggered to form a speed limiting module, and the speed limiting modules are installed in parallel or staggered on the road; The damping assembly includes: a disc, an iron core and a coil; the disc is arranged at one end of the roller, the iron core is evenly installed on the periphery of the disc, and the coil is wound on the iron core; The locking brake assembly includes: a locking brake wheel, a stator housing, a permanent magnet core winding, and a permanent magnet core; the locking brake wheel is mounted on the other end of the roller, and the stator housing is arranged radially outward of the locking brake wheel; the permanent magnet core is evenly arranged on the inner circumference of the stator housing, corresponding to the locking brake wheel, and the permanent magnet core winding is wound around the permanent magnet core; The control method of the intelligent traffic speed limiter comprises the following steps: S1: When the target vehicle enters the speed limit zone, the data processor obtains traffic light information and target vehicle driving information through traffic lights, rotary encoders and speed measurement components to determine whether speed limit is required; S2: If speed limit is determined to be necessary, the data processor sends a control signal to the brake lock assembly. The brake lock assembly limits the rotation direction of the roller and, through the damping assembly, assists the brake lock assembly in limiting the frequency and duration of the roller rotation direction, thereby intelligently decelerating the target vehicle. S3: If it is determined that speed limit is not required, the information is transmitted to the data processor, which sends a signal to the brake lock assembly, which then limits the rotation of the roller; Step S1 of the control method of the intelligent traffic speed limiter includes: S11: When the wheel of the target vehicle rolls over the first roller, the speed measurement component is first triggered, and the speed measurement component provides the data processor with the location information of the target vehicle area, and also provides the starting time and starting location of the speed measurement; The data processor analyzes the operating status of the target vehicle based on the information collected by the rotary encoder; S12: From the moment the target vehicle rolls over the second roller, the data processor collects the vehicle's position information, trigger time information, and speed information between the two speed measuring components. It also obtains the speed limit value based on the vehicle's current traffic light location and speed limit zone location. It also calculates the speed limit value based on the time-distance model formula: SS = T L v0+△S, calculate the safe distance between the front and rear vehicles, and thus determine whether the target vehicle needs to be speed-limited; Where SS is the safe vehicle distance, T L is the time distance, v0 is the speed of the vehicle in front, and △S is the distance maintained from the vehicle in front when braking to stop.

2. The intelligent traffic speed limiting device according to claim 1, characterized in that: The locking brake assembly also includes: a generator stator core and a generator stator coil. A generator rotor permanent magnet is provided on the outside of the locking brake wheel. The generator stator coil is wound on the generator stator core, and the generator rotor permanent magnet corresponds to the generator stator core.

3. The intelligent traffic speed limiting device according to claim 1, wherein: The speed measuring component is one of a position and weight sensor or a light wave speed meter.

4. The intelligent traffic speed limiting device according to claim 1, wherein: The surface of the roller is provided with convex points.

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