A protection system and method for preventing vehicle collision on bridge pier

Abstract

The present invention relates to the technical field of traffic control systems, and in particular to a protection system and method for preventing vehicle collisions on bridge piers. A protection system for preventing vehicle collisions on bridge piers, comprising an image acquisition module, a vehicle identification module, a first distance identification module, a second distance identification module, an early warning module and a buffer device; by extracting vehicle feature data on the road, the vehicle's driving direction and driving speed are calculated; based on the driving direction, the intersection point between the vehicle's driving route and the bridge pier is predicted, and the first distance between the vehicle and the intersection point is obtained; the second distance required for the vehicle to stop from braking is obtained; when the first distance is lower than the second distance, the early warning module issues an early warning message, and at the same time calculates the remaining collision time. When the remaining collision time is equal to the buffer device pop-up time, the buffer device is popped out according to the vehicle's driving direction and speed, while reducing the impact force of the collision, the collision risk is effectively reduced to ensure the safety of the bridge structure and the vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of traffic control systems, and in particular to a protection system and method for preventing vehicle collisions on bridge piers. Background Art

[0002] With the rapid development of my country's transportation industry in recent years, the rapid growth in the number of transportation tools has brought convenience to people's travel, but at the same time it corresponds to the high pressure of traffic in various cities and hub highways. Therefore, in order to meet people's travel needs, road designs such as underpasses and viaducts are usually set up to improve travel convenience. The viaduct is supported by high-supported piers. In the transportation hub area, there will also be roads for vehicles to pass under the viaduct. The huge traffic volume also buries potential hidden dangers for the safe operation of the bridge structure. Accidents of vehicles colliding with bridge piers occur from time to time. Vehicle collisions with bridges are not only serious traffic accidents, but may also cause damage to the bridge, destroy the integrity and durability of the bridge, and even cause more serious accidents such as bridge collapse, causing economic losses while posing a threat to the lives and safety of the people.

[0003] CN118298671A discloses a bridge anti-collision prediction protection system, which includes a microprocessor system, a distance measurement system, a speed measurement system, a buffer protection part, and a suspension device; the suspension device is arranged at the upper end of the bridge pier, and is also provided with an electric hook, and the buffer protection part is locked on the suspension device through the electric hook, and then suspended at the upper end of the bridge pier, and a slidable connection structure is adopted between the buffer protection part and the bridge pier. The microprocessor system is used to detect the passing ship through the distance measurement system and the speed measurement system. When it is detected that the ship is close to the bridge pier, and the speed of the ship exceeds the speed threshold of the distance at this distance, the microprocessor outputs a control signal to the electric hook to release the buffer protection part in time to protect the bridge pier from collision. However, since the distance measurement system can only judge the release time of the buffer device by detecting the distance between the ship and the bridge pier, it does not give the ship an early warning prompt in advance, and at the same time, the navigation trajectory of the ship is predicted and comprehensively analyzed in combination with the warning information, so it cannot reduce the accident rate.

[0004] CN117518118A discloses a pier anti-collision control method, which continuously collects environmental data, millimeter-wave radar data and laser radar data through the pier anti-collision system; processes the millimeter-wave radar data and laser radar data into fused data; calculates the risk prediction results in real time based on the environmental data and the fused data; controls the anti-collision device based on the risk prediction results, triggers the alarm device when the risk is higher than the first preset threshold, and inflates the airbag when the risk is higher than the second preset threshold, thereby reducing the damage risk of the pier and the ship. However, the calculation of the risk prediction results is complicated, and it is difficult to determine when to trigger the alarm device and when to inflate the airbag, which is inconvenient and poses a safety risk.

[0005] Therefore, the problem with the current existing technology is that accidents in which vehicles collide with bridge piers occur from time to time. Although a small number of bridge piers in highway traffic are covered with materials such as rubber pads, such a setting can only reduce the impact force of the vehicle on the bridge pier to a certain extent when an accident occurs, and cannot provide safety warning protection for the bridge pier. At the same time, it is impossible to accurately determine the timing of releasing the buffer device to enhance the protection effect. Therefore, a protection system and method for preventing bridge piers from vehicle collisions is needed. According to the vehicle's driving speed and driving direction, it is determined whether there is a collision risk with the bridge pier. When there is a collision risk, an alarm message is issued to the vehicle to remind the driver to correct the driving direction before the accident occurs, thereby reducing the accident rate and effectively protecting the safety of the bridge piers. At the same time, the buffer device is accurately released when a collision occurs to improve the protection effect of the bridge piers and minimize the risk. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a protection system for preventing vehicle collisions on bridge piers, comprising an image acquisition module, a vehicle identification module, a first distance identification module, a second distance identification module, an early warning prompt module and a buffer device which are sequentially connected by signals;

[0007] The image acquisition module is arranged on the bridge pier, and is used to acquire images of the roads within the acquisition range, identify vehicle information on the roads, and extract road images containing vehicles;

[0008] The vehicle identification module is used to analyze the road image containing the vehicle to obtain vehicle feature data, wherein the vehicle feature data includes the vehicle driving direction, vehicle driving speed and vehicle appearance feature information;

[0009] The first distance module is used to analyze and obtain the vehicle driving route according to the vehicle driving direction, and when there is an intersection between the vehicle driving route and the bridge pier position, obtain the distance between the vehicle and the intersection to obtain the first braking distance;

[0010] The second distance module is used to analyze and obtain the distance required for the vehicle to stop completely from the start of braking according to the vehicle's driving speed, thereby obtaining a second braking distance;

[0011] The early warning prompt module is used to send out an early warning signal to remind the vehicle to adjust the driving direction or speed when the first braking distance is less than the second braking distance;

[0012] The buffer device is arranged on the outer peripheral surface of the bridge pier, and is used to pop out when the vehicle is about to hit the bridge pier and reduce the impact force of the collision between the vehicle and the bridge pier;

[0013] The buffer device includes a mounting seat, a buffer block and a spring mechanism; the outer peripheral surface of the pier is provided with an annular mounting groove which is coaxially arranged with the pier and recessed toward the center of the pier, and the mounting seat is arranged in the annular mounting groove; the buffer block is located outside the mounting seat and is connected to the mounting seat through a spring mechanism; there are multiple buffer blocks, and the multiple buffer blocks are evenly distributed along the circumference of the annular mounting groove; the spring mechanism includes a spring and an electromagnetic lock, and the electromagnetic lock is connected to the system signal, and when a pop-up signal is received, the buffer block can adjust the spring expansion and contraction amount according to the vehicle impact angle, thereby adjusting the pop-up direction and popping out independently. The buffer block can adjust the pop-up direction according to the vehicle impact angle and pop out independently;

[0014] The buffer block pops out from the pier position along the radial direction of the pier, and according to the vehicle's driving route, a predicted impact angle between the vehicle and the pier is calculated, and the pop-up direction of the buffer block is adjusted based on the predicted impact angle so that the impact angle between the vehicle and the buffer block is smaller than the predicted impact angle.

[0015] Furthermore, the image acquisition module also includes an image training unit for extracting vehicle feature data from the acquired vehicle image, and performing feature training on the image acquisition module based on the vehicle feature data, so that the image acquisition module can recognize different vehicle models.

[0016] Furthermore, it also includes a dangerous driving behavior identification module connected to the image acquisition module signal, which is used to identify the dangerous driving behavior of the vehicle. When the dangerous driving behavior is identified, the additional braking distance is added to the second braking distance. The dangerous driving behavior includes one or more of speeding, underspeeding, sudden acceleration, sudden braking, sharp turning and driver distraction. The speeding is when the vehicle drives at a speed exceeding the speed specified by the road, the underspeed driving is when the vehicle drives at a speed lower than the speed specified by the road, the sudden acceleration is when the vehicle's speed change per unit time exceeds the acceleration threshold, the sudden braking is when the vehicle's speed change per unit time exceeds the deceleration threshold, the sharp turn is when the vehicle's turning amplitude exceeds the turning amplitude threshold per unit time, and the driver's distraction includes using a mobile phone, chatting, and dozing off during driving.

[0017] Furthermore, it also includes a marking module connected to the image acquisition module signal, which is used to mark vehicles that trigger warnings multiple times, obtain marking information of the marked vehicles, and wirelessly transmit the marking information to the image acquisition module of the next bridge pier on the driving path of the marked vehicle.

[0018] Furthermore, it also includes a vehicle information database connected to the vehicle identification module signal, which is used to store the braking data and vehicle appearance images of different vehicle models corresponding to different vehicle appearance feature information, the vehicle appearance images are used to input the image acquisition module to train and identify different vehicle models, and the braking data includes the braking data of different vehicle models at speed. The shortest stopping distance under driving .

[0019] The present invention also provides a method for protecting bridge piers from vehicle collisions. The method is implemented based on the above-mentioned protection system for protecting bridge piers from vehicle collisions, and comprises the following steps:

[0020] S1. The image acquisition module collects road images and extracts road feature information, and inputs vehicle feature information into the image acquisition module for training, identifies images containing vehicles in road images, and extracts vehicle feature data from the images containing vehicles through the vehicle recognition module to establish a vehicle information database;

[0021] S2. Calculate the vehicle route and vehicle speed based on the vehicle characteristic data;

[0022] S3. Calculate the first braking distance and the second braking distance according to the vehicle's driving direction and speed. When the first braking distance is less than the second braking distance, the system issues a warning message to prompt the vehicle to adjust its driving direction and speed. The first braking distance is the distance between the current position of the vehicle and the intersection of the extended line of the vehicle's driving route and the bridge pier. The second braking distance is the distance required for the vehicle to stop completely from the start of braking.

[0023] S4. Based on the first braking distance, the remaining time of the vehicle hitting the bridge pier is calculated. When the remaining time of the impact is equal to the buffer block pop-up time, the buffer block is popped out to reduce the damage to the bridge pier caused by the impact.

[0024] Furthermore, according to the vehicle model and the driving speed of the vehicle, the shortest braking distance of the vehicle model at the current driving speed is obtained in the vehicle information database, and the second braking distance is calculated according to the obtained shortest braking distance, and the calculation can be expressed as:

[0025]

[0026] in is the second braking distance, The shortest stopping distance is is an influencing factor, which is determined according to road slope, road grade, road environmental factors and safety margin.

[0027] Furthermore, when the vehicle adjusts its driving route to pass through the current bridge pier, the early warning prompt module of the current bridge pier is turned off, and the vehicle is marked as a marked vehicle, and the characteristic information of the marked vehicle is sent to the image acquisition module of the next bridge pier along the vehicle's driving direction. When the marked vehicle enters the acquisition range of the image acquisition module, the marked vehicle is identified.

[0028] The beneficial effects of the present invention are:

[0029] (1) The image acquisition module monitors the vehicle that enters the acquisition range and predicts the future driving route of the vehicle. When the vehicle's driving direction is abnormal due to distraction, fatigue driving, etc., and the vehicle will hit the bridge pier if it maintains the current driving direction, the first distance and the second distance are compared. If the first distance is less than the second distance, it means that if the vehicle's driving direction is not adjusted, the vehicle may hit the bridge pier. At this time, the warning prompt module of the bridge pier sends the prompt information to prompt the driver to adjust the driving direction and / or driving speed of the vehicle, reminding the driver to correct the driving direction before the collision occurs, reducing the accident rate of hitting the bridge pier and effectively protecting the safety of the bridge pier. In addition, if it is impossible to make the vehicle pass the bridge pier safely by correcting the driving direction of the vehicle, as long as the prompt information is received, braking is performed as soon as possible before the collision, which can also minimize the impact force during the collision, reduce the damage to the vehicle, protect the life of the vehicle driver, and also reduce the degree of damage to the bridge pier. ;

[0030] (2) By providing the buffer device on the bridge pier, the impact force generated when the vehicle collides with the bridge pier is reduced by the buffer device, thereby reducing the impact of the collision on the bridge pier. The buffer device is layered into the inner layer of the mounting seat and the outer layer of the buffer block. When a collision occurs, the mounting seat is integrally formed, and the impact force generated by the collision can be distributed as a whole to achieve a strong anti-collision ability. However, it is difficult and costly to replace the integrally formed mounting seat. Therefore, in the present invention, the outer layer of the buffer block is used to deal with smaller accidents, such as scratches between the vehicle and the bridge pier. The mounting seat is not consumed, and only the part of the buffer block that is impacted needs to be replaced after the collision, thereby achieving the purpose of saving resources. The mounting seat serves as the second line of protection for the bridge pier. When the buffer block cannot completely resist the impact force of the vehicle, the damage to the bridge pier is minimized. Furthermore, the buffer block is configured to be partially ejected and the ejection angle is controlled so that the angle at which the vehicle hits the buffer block can be adjusted to avoid a head-on collision between the vehicle and the buffer block and the bridge pier; at the same time, a plurality of the buffer blocks form an impact arc through different angles and different ejection lengths. During continuous collisions between the vehicle and the buffer block, the direction of travel of the vehicle is continuously changed through continuous angle adjustment of the impact arc, so that the head-on collision force between the vehicle and the buffer block is gradually reduced. At the same time, due to the loss of kinetic energy after the collision, the impact of the vehicle on the bridge pier can be reduced, thereby protecting the safety of the vehicle and the bridge pier to the greatest extent possible.

[0031] (3) When the driver is distracted, the driver may need a longer reaction time. Therefore, by identifying the driver's dangerous driving behavior and increasing the additional braking distance on the basis of the second distance based on the identification result, under the same conditions, the vehicle is monitored from a farther distance, and the early warning prompt module prompts the vehicle from a longer distance, giving the driver of the vehicle a longer reaction time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 , a schematic diagram of a protection system for preventing vehicle collisions with bridge piers according to the present invention.

[0033] Figure 2 , a flow chart of a protection method for bridge piers to prevent vehicle collisions according to the present invention.

[0034] Figure 3 , schematic diagram of the structure and impact arc surface of the buffer device of the present invention.

[0035] Figure 4 , schematic diagram of the buffer block changing the impact angle according to an embodiment of the present invention.

[0036] Figure 5 , schematic diagram of a storage medium according to an embodiment of the present invention.

[0037] Markings in the figure: 1-bridge pier, 2-mounting seat, 3-buffer block, 4-spring mechanism. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the content of the present invention and make the purpose, technical solution and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. The illustrative embodiments of the present invention and their description are only used to explain the present invention and are not intended to further limit the present invention.

[0039] like Figure 1 As shown, an embodiment of the present invention provides a protection system for preventing vehicle collisions with bridge piers, comprising an image acquisition module, a vehicle identification module, a first distance identification module, a second distance identification module, an early warning prompt module and a buffer device which are sequentially connected by signals;

[0040] The image acquisition module is arranged on the bridge pier 1, and is used to acquire images of the roads within the acquisition range, identify vehicle information on the roads, and extract road images containing vehicles;

[0041] The vehicle identification module is used to analyze the road image containing the vehicle to obtain vehicle feature data, wherein the vehicle feature data includes the vehicle driving direction, vehicle driving speed and vehicle appearance feature information;

[0042] The first distance module is used to analyze and obtain the vehicle driving route according to the vehicle driving direction, and when there is an intersection between the vehicle driving route and the position of the bridge pier 1, obtain the distance between the vehicle and the intersection to obtain the first braking distance;

[0043] The second distance module is used to analyze and obtain the distance required for the vehicle to stop completely from the start of braking according to the vehicle's driving speed, thereby obtaining a second braking distance;

[0044] The early warning prompt module is used to send out an early warning signal to remind the vehicle to adjust the driving direction or speed when the first braking distance is less than the second braking distance;

[0045] The buffer device is arranged on the outer peripheral surface of the bridge pier 1 , and is used to pop out when a vehicle is about to hit the bridge pier 1 and reduce the impact force of the collision between the vehicle and the bridge pier 1 .

[0046] Furthermore, the image acquisition module also includes an image training unit for extracting vehicle feature data from the acquired vehicle image, and performing feature training on the image acquisition module based on the vehicle feature data, so that the image acquisition module can recognize different vehicle models.

[0047] Furthermore, it also includes a dangerous driving behavior identification module connected to the image acquisition module signal, which is used to identify the dangerous driving behavior of the vehicle. When the dangerous driving behavior is identified, an additional braking distance is added to the second braking distance. The dangerous driving behavior includes speeding, underspeed driving, sudden acceleration, sudden braking, sharp turns and driver distraction.

[0048] Furthermore, it also includes a marking module connected to the image acquisition module signal, which is used to mark vehicles that trigger warnings multiple times, obtain marking information of the marked vehicles, and wirelessly transmit the marking information to the image acquisition module of the next bridge pier on the driving path of the marked vehicle.

[0049] Furthermore, it also includes a vehicle information database connected to the vehicle identification module signal, which is used to store the braking data and vehicle appearance images of different vehicle models corresponding to different vehicle appearance feature information, the vehicle appearance images are used to input the image acquisition module to train and identify different vehicle models, and the braking data includes the braking data of different vehicle models at speed. The shortest stopping distance under driving .

[0050] Furthermore, the early warning module also includes a marking submodule. After the vehicle adjusts its driving route and passes through the current bridge pier 1, the early warning module of the current bridge pier 1 is closed, and the vehicle is marked as a marked vehicle. The adjustment submodule sends the characteristic information of the marked vehicle to the image acquisition module of the next bridge pier 1, and the marked vehicle is identified when it enters the acquisition range of the image acquisition module.

[0051] Furthermore, the adjustment submodule also includes a fork road processing submodule. In the fork road processing submodule, after the vehicle passes through the current bridge pier 1, when the next bridge pier 1 that the vehicle may pass through is not unique due to the fork road, the characteristic information of the marked vehicle is sent to the image acquisition module of the next bridge pier 1 that may pass through. When the marked vehicle is identified within the image acquisition range of any one of the image acquisition modules, the image acquisition modules of the remaining next bridge piers 1 that may pass through will no longer identify the characteristic information of the marked vehicle.

[0052] Furthermore, the marking submodule also includes:

[0053] The number of layers module records the number of layers of the marked vehicle. When the vehicle triggers the early warning prompt module to turn on the prompt information, the vehicle is marked and becomes the marked vehicle, and the number of layers is one layer.

[0054] The number of layers increases the grandson module. When the next bridge pier 1 is passed, when the early warning prompt module is triggered and the prompt information is issued, the number of marked layers increases by one layer until the number of marked layers reaches the preset number of layers, and the staff goes to remind the driver of the marking vehicle;

[0055] The number of layers is reduced in the grandson module. When the next bridge pier 1 is passed and the early warning prompt module is not triggered, the number of layers of the mark is reduced by one layer until the number of layers of the mark is reduced to zero, and the marked vehicle is restored to a normal vehicle.

[0056] The second distance adjustment module adjusts the second distance according to the number of marking layers. The higher the number of marking layers, the longer the second additional distance corresponds to. The second additional distance is increased in real time to the second distance.

[0057] Furthermore, the vehicle collision prevention system of the bridge pier 1 also includes a prompt mode replacement module. When the number of marking layers increases continuously for more than two times, the early warning prompt module of the next bridge pier 1 changes the prompt information sending mode.

[0058] like Figure 5 As shown, the embodiment of the present invention also provides a computer device for running the protection system for preventing vehicle collision on bridge piers, and the computer device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (WIreless-FIdelity, WI-FI) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0059] Those skilled in the art will understand that Figure 5 The structure shown in the figure does not constitute a limitation on the electronic device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0060] like Figure 5As shown, the memory 1005 as a storage medium may include an operating system, a data storage module, a network communication module, a user interface module and an electronic program.

[0061] like Figure 5 In the electronic device shown, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the electronic device of the present invention can be set in the electronic device, and the electronic device calls a protection method for preventing vehicle collisions on bridge piers stored in the memory 1005 through the processor 1001, and executes a protection system for preventing vehicle collisions on bridge piers provided in an embodiment of the present invention.

[0062] Based on the aforementioned hardware operating environment and system architecture, such as Figure 2 As shown, an embodiment of the present invention also provides a protection method for bridge piers to prevent vehicle collision, comprising the following steps:

[0063] S1. The image acquisition module collects road images and extracts road feature information, and inputs vehicle feature information into the image acquisition module for training, identifies images containing vehicles in road images, and extracts vehicle feature data from the images containing vehicles through the vehicle recognition module to establish a vehicle information database;

[0064] S2. Calculate the vehicle route and vehicle speed based on the vehicle feature information;

[0065] S3. Calculate the first braking distance and the second braking distance according to the vehicle's driving direction and speed. When the first braking distance is less than the second braking distance, the system issues a warning message to prompt the vehicle to adjust its driving direction and speed. The first braking distance is the distance between the current position of the vehicle and the intersection of the extended line of the vehicle's driving route and the bridge pier 1. The second braking distance is the distance required for the vehicle to stop completely from the start of braking.

[0066] S4. Based on the first braking distance, the remaining time of the vehicle hitting the bridge pier 1 is calculated. When the remaining time equals the buffer block pop-up time, the buffer block pops up to reduce the damage to the bridge pier 1 caused by the impact.

[0067] Furthermore, an image acquisition module is provided on the bridge pier 1, and features of the road within the acquisition range are acquired by the image acquisition module. Vehicle images are input into the image acquisition module and then trained so that the image acquisition module can recognize vehicles appearing on the road;

[0068] Furthermore, the image acquisition module collects features of the road through a neural network to obtain the road model, and learns various vehicles to identify the vehicles appearing on the road;

[0069] The image acquisition module obtains the driving direction and driving speed of the vehicle according to the position change of the vehicle on the road per unit time;

[0070] Furthermore, after the vehicle on the road is identified, the vehicle's travel direction and travel speed are further identified by the change in the vehicle's movement position per unit time in the captured image;

[0071] Based on the driving direction of the vehicle, the driving route of the vehicle is determined, and when there is an intersection between the driving route of the vehicle and the position of the bridge pier 1, the distance between the vehicle and the intersection is obtained as the first distance;

[0072] Based on the travel speed of the vehicle, a distance required for the vehicle to stop from starting braking is obtained as a second distance;

[0073] When the first distance is smaller than the second distance, the early warning prompt module provided on the bridge pier 1 is turned on to send out a prompt message, wherein the prompt message is used to prompt the vehicle to adjust the driving direction and / or driving speed.

[0074] Furthermore, the first distance is the distance between the vehicle and the intersection, that is, if the driving route of the vehicle does not have the intersection with the bridge pier 1, it means that the vehicle will not collide with the bridge pier 1 according to the current driving direction, and there will be no first distance; the second distance is the distance required for the vehicle to reduce the speed of the vehicle to zero from braking based on the current driving speed. The faster the driving speed, the longer the second distance. The first distance changes accordingly with the change of the driving direction of the vehicle. When the driving direction of the vehicle is adjusted to the driving route without colliding with the bridge pier 1, the first distance takes an infinite value; the early warning prompt module can turn on or off the prompt information, and the prompt information includes different sound prompts and / or light prompts.

[0075] In this embodiment, the image acquisition module monitors the vehicle entering the acquisition range and predicts the future driving route of the vehicle. When the vehicle's driver is distracted, fatigued, or the like, and the vehicle's driving direction is abnormal, and the vehicle will collide with the bridge pier 1 if it maintains the current driving direction, the first distance and the second distance are compared. If the first distance is less than the second distance, it means that if the vehicle's driving direction is not adjusted, the vehicle may collide with the bridge pier 1. At this time, the warning prompt module of the bridge pier 1 sends the prompt information to prompt the driver to adjust the driving direction and / or driving speed of the vehicle. Before the collision occurs, the driver is reminded to correct the driving direction, reduce the accident rate of the collision with the bridge pier 1, and effectively protect the safety of the bridge pier 1. In addition, if the vehicle's driving direction cannot be corrected to allow the vehicle to pass the bridge pier 1 safely, as long as the prompt information is received, braking is performed as soon as possible before the collision, which can also minimize the impact force during the collision, reduce the damage to the vehicle, protect the life safety of the vehicle driver, and also reduce the degree of damage to the bridge pier 1.

[0076] In this embodiment, if Figure 4 As shown, a block buffer device is also provided on the pier 1, and the buffer device is used to reduce the impact force when a vehicle hits the pier 1. The buffer device includes a mounting seat 2, a buffer block 3 and a spring mechanism 4; the outer peripheral surface of the pier 1 is provided with an annular mounting groove which is coaxially arranged with the pier 1 and recessed toward the center of the pier 1, and the mounting seat 2 is arranged in the annular mounting groove; the buffer block 3 is located outside the mounting seat 2 and is connected to the mounting seat 2 through a plurality of spring mechanisms 4; a plurality of buffer blocks 3 are provided, and the plurality of buffer blocks 3 are evenly distributed along the circumference of the annular mounting groove; the spring mechanism 4 includes a spring and a solenoid valve, and the solenoid valve is connected to the system signal. When a pop-up signal is received, the buffer block 3 can adjust the spring expansion and contraction amount according to the vehicle impact angle, thereby adjusting the pop-up direction and popping out independently. The driving direction and size of the vehicle are identified according to the image acquisition module, and the predicted collision position between the vehicle and the bridge pier 1 is calculated. When the prompt information is issued, the remaining collision time between the vehicle and the pop-up buffer block 3 is calculated. When the remaining collision time is equal to the pop-up time of the buffer block 3, the buffer block 3 located at the predicted collision position is popped out.

[0077] Furthermore, the buffer device is made of materials including rubber material, steel material, composite material, concrete and foam material. The buffer device is arranged around the bridge pier 1 to absorb the energy generated by the collision to protect the bridge pier 1. The mounting seat 2 is directly connected to the bridge pier 1 and is closely attached to the bridge pier 1 for protection; the buffer block 3 is spaced apart from the bridge pier 1 and is closely attached to the mounting seat 2 when there is no instruction, without occupying the road space. After receiving the instruction, it pops up and serves as the first line of defense for the bridge pier 1 to collide with the vehicle; one of the connection methods of the buffer block 3 and the mounting seat 2 is as follows: Figure 3 or Figure 4 As shown, one end of the spring mechanism 4 is connected to the mounting seat 2, and the other end is connected to the buffer block 3. The mounting seat 2 serves as the base of the spring mechanism 4, and at the same time controls the electromagnetic lock in the spring compression state of the spring mechanism 4 to be electrically connected to the system. When the system does not issue an ejection command, the electromagnetic lock squeezes the spring in the spring mechanism 4 to make the mounting seat 2 and the buffer block 3 fit together; when the remaining time of the collision is equal to the ejection time of the buffer block 3, the system issues an ejection command, and the electromagnetic lock releases the spring in the spring mechanism 4 after receiving the command, providing the buffer block 3 with a thrust away from the bridge pier, so that the buffer block 3 pops up and collides with the vehicle. According to the image acquisition module, the driving direction of the vehicle and the size of the vehicle are identified, and the predicted collision position of the vehicle and the bridge pier 1 is calculated. Since cars and trucks are of different sizes, even if the impact positions are the same, the impact areas will be quite different. Therefore, by identifying the size of the vehicle and combining the driving direction of the vehicle, the predicted impact positions of different positions and areas can be obtained. At the same time, since each buffer block 3 can be popped out independently, only the buffer block 3 located at the predicted impact position can be popped out; when the prompt information is issued, the driver of the vehicle is given time to react, and the remaining impact time is calculated based on the driving speed of the vehicle and the distance from the popped-up buffer block 3, and the remaining impact time is updated in real time. When the remaining impact time is equal to the pop-up time of the buffer block 3, the buffer block 3 is popped out to deal with the vehicle impact; the pop-up time of the buffer block 3 is obtained based on actual tests of each buffer block 3.

[0078] In this embodiment, the process in which the buffer block 3 located at the predicted impact position pops out also includes:

[0079] The buffer block 3 pops out from the position of the bridge pier 1 along a set direction;

[0080] The buffer block 3 obtains a predicted impact angle between the vehicle and the bridge pier 1 according to the driving route of the vehicle, and adjusts the ejection direction of the buffer block 3 according to the predicted impact angle, so that the impact angle between the vehicle and the buffer block 3 is smaller than the predicted impact angle.

[0081] Furthermore, when the vehicle collides head-on with the bridge pier 1, the damage to the vehicle and the bridge pier 1 is the greatest. When the vehicle collides with the side of the bridge pier 1 at an angle, under the condition of the same speed and mass, the smaller the collision angle, the smaller the damage to the vehicle and the bridge pier 1. When the collision angle reaches the limit of zero degrees, no collision occurs. See Figure 3 As shown in the figure, as a schematic diagram, the shape and size of the buffer block 3 are adjusted according to the actual situation. The predicted driving route of the vehicle collides head-on with the bridge pier 1, that is, the tangent of the bridge pier 1 at the collision position and the predicted collision angle of the vehicle are 90°. At this time, in order to reduce the damage, the buffer block 3 is ejected. Since the angle of the buffer block 3 is adjustable, by adjusting the collision angle to be less than 90°, when the other conditions are consistent, the damage is relatively small. If the predicted collision angle is other angles, similarly, as long as the collision angle β° between the buffer block 3 and the vehicle is smaller than the predicted collision angle α°, the damage to the vehicle and the bridge pier 1 can be reduced.

[0082] Furthermore, the collision between the vehicle and the bridge pier 1 can be regarded as continuous collisions between different positions of the vehicle and the bridge pier 1. After each collision, the driving direction of the vehicle changes and kinetic energy is lost.

[0083] In this embodiment, the buffer device is provided on the bridge pier 1, and the impact force generated when the vehicle collides with the bridge pier 1 is reduced by the buffer device, thereby reducing the impact of the collision on the bridge pier 1. The buffer device is layered into the inner layer of the mounting seat 2 and the outer layer of the buffer block 3. When a collision occurs, the mounting seat 2 is integrally formed, and the impact force generated by the collision can be distributed as a whole to achieve a strong anti-collision ability. However, it is difficult to replace the integrally formed mounting seat 2, and the cost is high. Therefore, in the present invention, the outer layer of the buffer block 3 is used to deal with smaller accidents, such as the scratch accident caused by the vehicle and the bridge pier 1. The mounting seat 2 is not consumed, and only the part of the buffer block 3 that is impacted needs to be replaced after the collision, thereby achieving the purpose of saving resources. The mounting seat 2 serves as the second line of protection for the bridge pier 1. When the buffer block 3 cannot completely resist the impact force brought by the vehicle, the damage to the bridge pier 1 is minimized. Furthermore, the buffer block 3 is configured to be partially ejected and the ejection angle is controlled so that the angle at which the vehicle hits the buffer block 3 can be adjusted to avoid a frontal collision between the vehicle and the buffer block 3 and the bridge pier 1; Figure 4As shown, a plurality of the buffer blocks 3 form an impact arc surface through different angles and different pop-up lengths. During the continuous collision process between the vehicle and the buffer blocks 3, the direction of travel of the vehicle is continuously changed through continuous angle adjustment of the impact arc surface, so that the frontal impact force between the vehicle and the buffer blocks 3 is gradually reduced. At the same time, due to the loss of kinetic energy after the collision, the impact of the vehicle on the bridge pier 1 can be reduced, thereby protecting the safety of the vehicle and the bridge pier 1 to the greatest extent possible.

[0084] In this embodiment, different dangerous driving behaviors of vehicles are defined in the image acquisition module so that the image acquisition module can identify different dangerous driving behaviors of vehicles. The dangerous driving behaviors of vehicles may include one or more of the following situations: speeding, underspeed driving, sudden acceleration, sudden braking, sharp turns, and driver distraction. When the image acquisition module identifies different dangerous driving behaviors of vehicles, the first additional distance is added to the second distance.

[0085] Furthermore, driver distraction driving includes: using mobile phones, chatting, and dozing off. These behaviors are obviously different from normal driving, and the image acquisition module can identify them using existing technologies.

[0086] In this embodiment, dangerous driving behaviors of the vehicle during driving can be identified in the following two ways: (1) identifying whether the vehicle is driving at a speed exceeding the prescribed speed, driving at a speed below the prescribed speed, accelerating beyond a threshold value per unit time, braking beyond a threshold value per unit time, or turning beyond a threshold value per unit time; and (2) capturing the image of the driver through the image acquisition module to identify whether the driver is distracted by playing with a mobile phone or making a phone call.

[0087] When the driver is distracted, the driver may need a longer reaction time. In order to ensure the driving safety of the bridge pier 1 and the vehicle, the first additional distance is increased on the basis of the second distance. Under the same conditions, the vehicle is monitored from a farther distance, and the early warning module prompts the vehicle from a longer distance, giving the driver of the vehicle a longer reaction time.

[0088] In this embodiment, a vehicle information database is set up, and the vehicle information database is used to enter the characteristic data and braking data of several types of vehicles. The characteristic data is the appearance image of the vehicle, which is used to input the image acquisition module to train and identify the vehicle model. The braking data includes the different types of vehicles at speed. The shortest stopping distance under driving ;

[0089] After the image acquisition module identifies the vehicle model and the vehicle speed, the shortest braking distance of the vehicle model at the current speed is obtained from the vehicle feature recognition database, and the second braking distance is calculated based on the obtained shortest braking distance. The calculation can be expressed as:

[0090]

[0091] in is the second braking distance, The shortest stopping distance is is an influencing factor, which is determined according to road slope, road grade, road environmental factors and safety margin.

[0092] Furthermore, different models of vehicles have different braking capabilities, and the braking capability data will be published before they are put on the market. For example, when vehicle A is traveling at a speed of 80 km / h, the shortest braking distance is 100 meters. By setting up the database and inputting the image data and braking data of different models of vehicles in advance, the shortest braking distance required for vehicle A to travel at speed S can be obtained by querying the database. After training, the image acquisition module can recognize the style of the vehicle on the road, and combined with the driving speed of the vehicle, the current required shortest braking distance D of vehicle A can be obtained from the database.

[0093] Furthermore, different types of vehicles are classified according to their sizes, and the average shortest braking distance of each type of vehicle at different speeds is obtained. When the image acquisition module fails to identify the style of the vehicle, it can classify the vehicle by identifying its size, and then match the shortest braking distance according to the speed of the vehicle. .

[0094] The second distance is usually not equal to the shortest stopping distance , because the influencing factor affecting the value of the second distance is affected by multiple factors.

[0095] Furthermore, the greater the uphill slope of the road, the shorter the second distance; and the greater the downhill slope of the road, the longer the second distance.

[0096] Furthermore, the road is graded according to the pavement design speed and the pavement condition. The faster the pavement design speed and the better the pavement condition, the longer the second distance.

[0097] Further, in combination with the previous implementation scheme, different road environments correspond to different normal driving speed ranges; the road environments include normal, rainy and icy, and the second distance in icy conditions is longer than that in rainy conditions, and the second distance in rainy conditions is longer than that in normal conditions.

[0098] Furthermore, different load sizes of vehicles of the same model will also affect the value of the second distance. For example, when a truck is traveling at the same speed, the greater the mass of the cargo it carries, the greater the inertia and the more difficult it is to stop. The specific mass can be associated with the mass measured when the vehicle enters the highway intersection.

[0099] Furthermore, those skilled in the art can obtain the influencing factors by controlling the variables one by one, performing repeated experimental calculations and combining the safety margin. The value of .

[0100] In this embodiment, after the step of opening the early warning prompt module and issuing a prompt message, the following steps are further included:

[0101] After the vehicle adjusts its driving route and passes through the current bridge pier 1, the warning prompt module of the current bridge pier 1 is turned off, and the vehicle is marked as a marked vehicle;

[0102] The characteristic information of the marked vehicle is sent to the image acquisition module of the next pier 1, and when the marked vehicle enters the acquisition range of the image acquisition module, the marked vehicle is identified.

[0103] In this embodiment, after the vehicle passes through the current bridge pier 1, if the next bridge pier 1 that the vehicle may pass through is not unique due to a fork in the road, the characteristic information of the marked vehicle is sent to the image acquisition module of the next bridge pier 1 that the vehicle may pass through. When the marked vehicle is identified within the image acquisition range of any image acquisition module, the image acquisition modules of the remaining next bridge piers 1 that may pass through will no longer identify the characteristic information of the marked vehicle.

[0104] In this embodiment, after the warning prompt module is turned on, the vehicle adjusts its driving direction and passes through the bridge pier 1, and the vehicle is marked to become the marked vehicle. However, since the dangerous driving behaviors such as driver fatigue driving, chatting and distraction are continuous, dangerous driving behaviors are still likely to occur after the warning prompt module is reminded. Therefore, it is necessary to continuously monitor the marked vehicle. The image acquisition module obtains feature information based on the image data of the marked vehicle, and sends the feature information to the image acquisition module of the next bridge pier 1 in the driving direction of the marked vehicle. When the marked vehicle enters the acquisition range of the image acquisition module, the marked vehicle is identified in time, so that the dangerous driving behaviors of the vehicle occurring during the driving process of the vehicle can be identified in a larger range; further, the image acquisition module is set to a rotatable viewing angle, and the estimated arrival time of the marked vehicle is calculated according to the driving speed of the marked vehicle and the distance between the two bridge piers 1. Before the arrival time, the image acquisition module rotates the viewing angle to the direction of arrival of the marked vehicle. Next, the image acquisition module follows the movement of the vehicle until the vehicle passes through the bridge pier 1 and leaves the image acquisition range of the image acquisition module, so as to realize the identification of dangerous driving behaviors of the vehicle in a larger range. In addition, the early warning prompt module moves with the vehicle so that the early warning prompt module is as directly facing the vehicle as possible so that more prompt information can be transmitted to the vehicle; further, when the next bridge pier 1 that the vehicle may pass through is not unique due to a fork in the road, the arrival time of the marked vehicle is predicted separately, and when the image acquisition module of one of the bridge piers 1 recognizes the presence of the marked vehicle, the image acquisition modules of the other next bridge piers 1 that may pass through will no longer recognize the characteristic information of the marked vehicle.

[0105] In this embodiment, after marking the vehicle as the step of marking the vehicle, the following steps are further included:

[0106] The number of marking layers of the marked vehicle is recorded. When the vehicle triggers the early warning prompt module to send the prompt information for the first time, the vehicle is marked and becomes the marked vehicle, and the number of marking layers is one layer.

[0107] When passing the next bridge pier 1, the early warning prompt module is triggered and the prompt information is issued, and the number of marking layers increases by one. If the number of marking layers reaches the preset number of layers, the staff will go to remind the driver of the marking vehicle. The preset number of layers is set by technicians in this field according to safety needs.

[0108] When passing the next bridge pier 1, if the early warning module is not triggered, the number of marking layers is reduced by one. If the number of marking layers is reduced to zero, the marked vehicle returns to a normal vehicle.

[0109] The number of marking layers is used to adjust the second distance. A higher number of marking layers corresponds to a longer second additional distance, and the second additional distance is increased in real time to the second distance.

[0110] In this embodiment, when the number of marked layers increases twice or more continuously, the early warning prompt module of the next pier 1 changes the prompt information sending mode.

[0111] In this embodiment, when the marked vehicle passes through the bridge pier 1, the warning prompt module is triggered multiple times, indicating that the driver of the vehicle is likely to be in a bad state. Therefore, according to the increase in the number of times the warning prompt module is triggered, the number of marking layers is gradually increased, and the higher the number of marking layers, the longer the second additional distance. When the number of marking layers reaches the preset number of layers, staff are arranged to go and remind the marked vehicle. The preset number of layers is set by technical personnel in this field according to safety needs. If the warning prompt module is triggered when passing through the previous bridge pier 1 and the warning prompt module is not triggered when passing through the current bridge pier 1, it means that the driver of the vehicle may be restored. The number of marking layers is reduced by one layer until the number of marking layers of the marked vehicle is zero, then the marking is cancelled and the marked vehicle is restored to a normal vehicle; further, when the number of marking layers increases twice or more continuously, the warning prompt module of the next bridge pier 1 changes the prompt information sending mode to avoid visual or auditory fatigue of the driver of the vehicle and make the driver more sensitive to the prompt information.

[0112] Further, in this article, the term "comprises", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the article or device comprising the elements.

[0113] The above is a detailed introduction to a protection method for preventing vehicle collisions on bridge piers. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the protection method for preventing vehicle collisions on bridge piers and its core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A protection system for bridge piers to prevent vehicle collision, characterized in that: It includes an image acquisition module, a vehicle identification module, a first distance identification module, a second distance identification module, an early warning prompt module and a buffer device which are sequentially connected by signals; The image acquisition module is arranged on the bridge pier (1) and is used to acquire images of roads within a collection range, identify vehicle information on the road, and extract road images containing vehicles; The vehicle identification module is used to analyze the road image containing the vehicle to obtain vehicle feature data, wherein the vehicle feature data includes the vehicle driving direction, vehicle driving speed and vehicle appearance feature information; The first distance module is used to analyze and obtain a vehicle driving route according to the vehicle driving direction, and when there is an intersection between the vehicle driving route and the position of the bridge pier (1), obtain the distance between the vehicle and the intersection to obtain a first braking distance; The second distance module is used to analyze and obtain the distance required for the vehicle to stop completely from the start of braking according to the vehicle's driving speed, thereby obtaining a second braking distance; The early warning prompt module is used to send out an early warning signal to remind the vehicle to adjust the driving direction or speed when the first braking distance is less than the second braking distance; The buffer device is arranged on the outer peripheral surface of the bridge pier (1); if, after the vehicle passes the warning signal, the vehicle's driving route still intersects with the bridge pier (1), and the vehicle collision time is equal to the buffer device pop-up time, the buffer device pops up to reduce the impact force of the collision between the vehicle and the bridge pier (1); The buffer device comprises a mounting seat (2), a buffer block (3) and a spring mechanism (4); the outer peripheral surface of the pier (1) is provided with an annular mounting groove which is coaxially arranged with the pier and recessed toward the center of the pier (1), and the mounting seat (2) is arranged in the annular mounting groove; the buffer block (3) is located outside the mounting seat (2) and is connected to the mounting seat (2) through a plurality of spring mechanisms (4); a plurality of buffer blocks (3) are provided, and the plurality of buffer blocks (3) are evenly distributed along the circumference of the annular mounting groove; the spring mechanism (4) comprises a spring and an electromagnetic lock, and the electromagnetic lock is connected to a system signal. When a pop-up signal is received, the buffer block (3) can adjust the spring expansion and contraction amount according to the vehicle impact angle, thereby adjusting the pop-up direction and independently popping out; The buffer block (3) pops out from the position of the pier (1) radially along the pier (1), and a predicted impact angle between the vehicle and the pier (1) is calculated based on the vehicle's travel route, and the pop-out direction of the buffer block (3) is adjusted based on the predicted impact angle, so that the impact angle between the vehicle and the buffer block (3) is smaller than the predicted impact angle.

2. A protection system for preventing a bridge pier from a vehicle collision according to claim 1, characterized in that: The image acquisition module also includes an image training unit, which is used to extract vehicle feature data from the acquired vehicle image, and perform feature training on the image acquisition module based on the vehicle feature data, so that the image acquisition module can recognize different vehicle models.

3. A protection system for preventing a bridge pier from a vehicle collision according to claim 1, characterized in that: It also includes a dangerous driving behavior identification module connected to the image acquisition module signal, which is used to identify the dangerous driving behavior of the vehicle. When the dangerous driving behavior is identified, an additional braking distance is added to the second braking distance. The dangerous driving behavior includes one or more of speeding, underspeeding, sudden acceleration, sudden braking, sharp turns and driver distraction. The speeding means that the vehicle drives at a speed exceeding the speed specified by the road, the underspeed means that the vehicle drives at a speed lower than the speed specified by the road, the sudden acceleration means that the speed change of the vehicle per unit time exceeds the acceleration threshold, the sudden braking means that the speed change of the vehicle per unit time exceeds the deceleration threshold, the sharp turn means that the turning amplitude of the vehicle per unit time exceeds the turning amplitude threshold, and the driver distraction includes using mobile phones, chatting, and dozing off during driving.

4. A protection system for preventing a bridge pier from a vehicle collision according to claim 1, characterized in that: It also includes a marking module connected to the image acquisition module signal, which is used to mark vehicles that have triggered warnings multiple times, obtain marking information of the marked vehicles, and wirelessly transmit the marking information to the image acquisition module of the next bridge pier (1) on the driving path of the marked vehicle.

5. The protection system for preventing vehicle collision on bridge piers according to claim 1, characterized in that: It also includes a vehicle information database connected to the vehicle identification module signal, which is used to store the braking data and vehicle appearance images of different vehicle models corresponding to different vehicle appearance feature information. The vehicle appearance images are used to input the image acquisition module to train and identify different vehicle models. The braking data includes the speed of different vehicle models. The shortest stopping distance under driving .

6. A method for protecting bridge piers from vehicle collisions, the method being implemented based on a protection system for protecting bridge piers from vehicle collisions as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: S1. The image acquisition module collects road images and extracts road feature information, and inputs vehicle feature information into the image acquisition module for training, identifies images containing vehicles in road images, and extracts vehicle feature data from the images containing vehicles through the vehicle recognition module to establish a vehicle information database; S2. Calculate the vehicle route and vehicle speed based on the vehicle characteristic data; S3. Calculate a first braking distance and a second braking distance according to the vehicle's driving direction and speed, respectively. When the first braking distance is less than the second braking distance, the system issues a warning message to prompt the vehicle to adjust its driving direction and speed. The first braking distance is the distance between the current position of the vehicle and the intersection of the extended line of the vehicle's driving route and the bridge pier (1). The second braking distance is the distance required for the vehicle to stop completely from the start of braking. S4. Based on the first braking distance, the remaining time of the vehicle's impact on the bridge pier (1) is calculated, and when the remaining time of the impact is equal to the buffer block ejection time, the buffer block is ejected to reduce the damage caused by the impact to the bridge pier (1).

7. A method for protecting bridge piers from vehicle collisions according to claim 6, characterized in that: According to the vehicle model and the driving speed of the vehicle, the shortest braking distance of the vehicle model at the current driving speed is obtained in the vehicle information database, and the second braking distance is calculated according to the obtained shortest braking distance, and the calculation can be expressed as: in is the second braking distance, The shortest stopping distance is is an influencing factor, which is determined according to road slope, road grade, road environmental factors and safety margin.

8. A method for protecting bridge piers from vehicle collisions according to claim 6, characterized in that: When the vehicle adjusts its driving route to pass through the current bridge pier (1), the early warning prompt module of the current bridge pier (1) is closed, and the vehicle is marked as a marked vehicle, and characteristic information of the marked vehicle is sent to an image acquisition module of the next bridge pier (1) along the vehicle's driving direction. When the marked vehicle enters the acquisition range of the image acquisition module, the marked vehicle is identified.

Images