110results about How to "Reduce rear-end collisions" patented technology

The invention discloses an early warning and protection system for rear-end collision in an expressway and a control method. The early warning and protection system comprises a driver road condition selection module, an environmental monitoring module, a master control module and an execution module. Driver road condition selections comprise a dry road surface, a wet road surface and an ice and snow road surface. A driver selects corresponding switch positions according to the practical road surface situations, a laser range finder measures the distance between a vehicle of the driver and a rear vehicle in real time; a real-time critical safety following distance obtained according to the distance information, speed information of the vehicle, and the road surface selection switch position information is compared with the measured practical following distance; and a high brake lamp and an active safety headrest trigger unit are turned on according to the danger level. The early warning and protection system reduces the probability of rear-end accidents in the expressway to the greatest extent, and minimizes injuries of drivers and passengers when the rear-end accidents happen.

The invention provides a vehicle detecting and early-warning method based on machine vision and a cascade classifier, which comprises the steps of carrying out cascade classifier training on positive and negative samples by using edited automobile pictures of known automobile models on the market; building a mathematical model of the recognition frame width and the real distance through a lot of measured data; acquiring images in real time; carrying out image preprocessing, and framing a region-of-interest; carrying out target recognition on the region-of-interest; performing data analysis on a recognition result so as to screen and track a target; carrying out recognition frame moving average filtering processing on the tracked target; and calculating the real distance of the recognition target, calculating the moving speed of a vehicle through the frame difference time and the real distance difference so as to acquire the time when collision possibly occurs and display early-warning information. The method provided by the invention effectively improves the recognition efficiency for a moving target in the real environment and enhances the capacity for detecting and tracking the moving target in a complex environment through the processes of cascade classifier training performed by using the positive and negative samples, real-time image acquisition, image preprocessing, target recognition, target tracking and screening, target early-warning and the like.

The invention discloses a traffic event influence analysis method based on a traffic flow wave theory, falling in the technical field of traffic control. According to the invention, a flow-density-speed diagram is drawn firstly according to a specified jammed road section; the speed of a traffic wave from the upstream to the middle part of the jammed road section is then calculated to obtain the speed of the jammed traffic wave and the vehicle queue length from the upstream to the middle part; and the speed of the traffic wave from the middle part to the downstream of the jammed road section is finally calculated, to obtain the speed of dissipating the traffic wave from the middle part to the downstream of the jammed road section, so as to work out the vehicle queue waiting time of the jammed road section. The inventive method can improve the actual effective carrying capacity of highway, reduce rear-end crash accidents, and maintain traffic flow stability.

The invention discloses an elevated-road rainwater recovery system and a construction method thereof. The elevated-road rainwater recovery system comprises short drainage pipes, drainage pipes, suspension pipes, stand pipes and rainwater recovery boxes; the short drainage pipes are located in retaining walls which are vertically connected on two top sides of an elevated bridge, top ends of the drainage pipes are fixedly connected with the short drainage pipes through pipe joint parts, the two neighboring suspension pipes are connected through a horizontal pipe, the rainwater recovery boxes are connected with rotary nozzles through water pipes which are connected to bottoms of the rainwater recover boxes, and a water suction pump is arranged on each water pipe. The construction method includes: arrangement of the short drainage pipes, construction of pipe connection, construction of rainwater recovery boxes, construction of rotary nozzles and trial operation of the rainwater recovery system. Rainwater accumulation on the elevated road is reduced, occurrence of rear-end collision due to slipping of wheels of vehicles is decreased, construction can be performed directly on existing elevated roads, rainwater on the elevated road can be effectively recycled, water resources are saved, and meanwhile, security of the elevated road is improved.

The invention relates to a vehicle dynamic display device and a displaying method thereof. The vehicle dynamic display device comprises an MEMS microaccelerometer, a vehicle state discriminator, a driver, a LED display or an EL emitting diode. An accelerometer is adopted for detecting state; an automatic decision can be performed on states of collision, emergency brake, urgency speed reduction, general speed reduction and acceleration through the vehicle state discriminator; real-time display can be respectively performed according to the urgent degree ordering in various colors, graphics, characters or the combination thereof; hand operation is replaced by automatic control, and the two signals of Preparation-Break replace break signals, so that the difficulty of Emergency Brake Precaution is solved. Once a vehicle is in danger, all vehicles thereafter can synchronously put on the brakes as well as the front vehicle, and an early warning time of 0.8 second to 1 second can be gained, thereby effectively avoiding the phenomena of driving too close to the car in front and serially driving too close to the car in front. The comprehensive early warning mechanism overcomes a plurality of defects in the traditional signal lamp and creates the beginning of mutual communication among vehicles, knowing one and others and safe driving. The invention has the advantages of low cost, high cost performance and simple installation, and is suitable for high-level installation at the tail parts of various vehicles and the installation of rear boxes of motorcycles and mopeds.

The invention relates to a variable speed limit control method for preventing a rear-end collision at a tunnel entrance and a tunnel exit. Traffic flow detectors are arranged at the downstream positions of the tunnel entrance and the tunnel exit and real-time traffic flow data are automatically obtained from time to time to monitor the traffic flow state; variable information prompt boards are arranged on the upstream positions of the tunnel entrance and the tunnel exit. Based on the transmission feature of congestion waves, occurrence conditions of the rear-end collision are calculated by taking the feature that congestion can be rapidly transmitted to the upstream into consideration. The optimal speed limit value is calculated out by taking comprehensive factors into consideration. The comprehensive factors include the visual adaption time caused by variation of the light intensity when a driver enters or exits the tunnel. The variable information prompt boards are used for reminding entering vehicles and existing vehicles from time to time and the defect that initial precaution can not be executed for rear-end collisions at the tunnel entrance and the tunnel exit in the past is overcome. The occurrence rate of the rear-end collisions at the tunnel entrance and the tunnel exit is greatly reduced, the control method is simple and easy to achieve and the wide prospect is achieved.

The invention discloses a traffic control system for improving the road capacity. The traffic control system comprises a traffic flow detection unit, a data analyzing and discrimination unit, a local control unit and a variable information plate driving unit; the data analyzing and discrimination unit and an upper computer as well as the local control unit of a command center are connected and can realize data exchange; and the local control unit is respectively connected with the traffic flow detection unit and the variable information plate driving unit, and can realize data exchange respectively with the traffic flow detection unit and the variable information plate driving unit. By changing the method for setting fixed speed limit standard of the traditional express way section, the invention has the advantages that the upper limit speed value is ensured to be changed according to the variation of real-time traffic flow to ensure the stability of traffic flow, thus the average running speed of vehicles can be improved, the parking times can be reduced, the pollutant emission can be lowered, and the energy consumption can be decreased.

The invention provides an automobile frontal collision active protection system which belongs to the technical field of automobile safety, and solves the problem that a traditional automobile safety airbag protection device cannot fundamentally prevent rear-end accidents. The automobile frontal collision active protection system comprises a safety airbag device and a controller; the controller can control the work of the safety airbag device; the controller comprises a central processing unit, a signal transmitter and a signal receiver; the signal transmitter and the signal receiver are connected with the central processing unit, and the central processing unit can send pre-warming signals to nearby vehicles when collision happens; and the signal receiver can be used to receive the pre-warning signals sent by vehicles ahead upon collision. The automobile frontal collision active protection system can send the pre-warning signals to nearby vehicles under the premise that the vehicle collides, so that the nearby vehicles can slow down or detour after receiving advance pre-warning, thereby reducing rear-end accidents to some extent.

The invention discloses a rear-end collision preventing safety system and method with early warning and protecting functions. The system comprises a radar controller unit, a lamplight controller unit, a danger warning lamp, a man-machine interaction unit, an active safety belt unit and an active seat unit. The radar controller unit is connected with the lamplight controller unit, the man-machine interaction unit, the active safety belt unit and the active seat unit. The lamplight controller unit is connected with the danger warning lamp. By the adoption of the system and method, rear-end collisions can be reduced, and when a rear-end collision cannot be avoided, harm caused by the collision to a driver and passengers can be reduced.

The invention discloses a vehicle intelligent safety warning system which comprises an analysis and control module, an input setting module, a detecting module, a display module and an alarm module. The analysis and control module is respectively electrically connected with the other modules and is electrically connected with a control system of an automobile, the input setting module and the display module are arranged in a cab, the alarm module comprises an alarm in the automobile and a warning display, the alarm in the automobile is arranged in the cab, and the warning display is disposed at the tail of the automobile. Different drivers can set safety parameters according to different individual driving characteristics of the drivers via the vehicle intelligent safety warning system in advance, relevant safety parameters can be acquired in real time in an automobile running process, warning signals can be instantly transmitted to a driver of the automobile or drivers of automobiles behind the automobile once real-time data are in preset safety parameter ranges, and probability of occurrence of rear-end collision in the automobile running process can be effectively reduced.

The invention discloses an intelligent control device for an automobile brake lamp, which is used for preventing rear collision. The intelligent control device is characterized by comprising a central processor (1), an acceleration pedal displacement sensor (2) and a brake lamp control circuit (3), wherein the acceleration pedal displacement sensor (2) is used for acquiring an acceleration pedal displacement change signal (4) and transmitting the signal to the central processor (1); the central processor (1) is used for computing an acceleration pedal displacement change rate according to the acceleration pedal displacement change signal (4); positive and negative acceleration pedal displacement change rates represent treading of an acceleration pedal and loosening of the acceleration pedal respectively; and when the acceleration pedal displacement change rate reaches an acceleration pedal displacement change rate threshold value set in the central processor (1), i.e., the acceleration pedal releasing action of a driver is very quick, the central processor (1) considers that the driver is going to perform emergency braking and transmits a control signal (8) to the brake lamp control circuit (3), so that the brake lamp is lightened before the driver treads on a brake pedal.

The invention relates to an early warning portal frame system of an ultrahigh vehicle at a height-limited road section, comprising a detection portal frame, a warning portal frame and an impact portal frame. The safety height is marked on the detection portal frame and a shading detector is arranged on the detection portal frame. The warning portal frame is provided with an LED (Light Emitting Diode) dot lattice display for prompting the ultrahigh vehicle. The shading detector works by adopting an infrared shading principle. The impact portal frame is used for preventing the impact of the ultrahigh vehicle and a structure at the upper part of the height-limited road section. The invention reduces the possibility of the rigid impact of the ultrahigh vehicle, simultaneously reduces the secondary hazards of rear-end impact of vehicles, traffic jam and the like and has huge social and economic benefits.

The invention discloses a road-section-pedestrian-crossing control method based on a machine vision, and belongs to the field of intelligent traffic safety management. The method includes the steps that firstly, related data of road-section pedestrians and motor vehicles is collected, and characteristic data such as the waiting quantity of the pedestrians, watering time of the pedestrians, road traffic flow and the queuing length of the motor vehicles is further identified and calculated; secondly, normalization processing is carried out on the basis that the longest waiting time of the pedestrians, the maximal waiting number of people, the maximal vehicle flow and the longest queuing length of the motor vehicles are set; finally, the going-through priority range is divided by determiningdifferent threshold values. When traffic conflict is generated between the road-section pedestrians and the motor vehicles, characteristic threshold values can be compared through a control center, going-through priorities of the pedestrians and the motor vehicles are reasonably distributed accordingly, and corresponding signal lamp controlling is carried out. The method is simple in design, roadtraffic conditions are obtained and analyzed in real time and comprehensively considered through the machine vision, people-vehicle conflict can be effectively reduced, and the occurrence rate of rear-end accidents of motor vehicles is decreased while the pedestrian safety is guaranteed; the method has the extremely-practical engineering application value in the aspect of traffic safety management.

The invention discloses a vehicle rear-direction anti-collision control system. The system comprises an information acquisition module used for collecting the distance and relative speed between a current vehicle and a rear vehicle and the distance between the current vehicle and a front vehicle, an information processing module used for acquiring the information collected by the information acquisition module and judging whether the current vehicle has the rear-end risk due to the rear vehicle or not, an information output module used for sending early warning information when the current vehicle has the rear-end risk, an electronic throttle control device used for controlling vehicle acceleration, and a positioning module used for determining the position of the vehicle. Meanwhile, the invention further provides a vehicle rear-direction anti-collision control method.

The invention discloses a road isolation fence for buffering and warning. Isolation pile, a warning lamp is mounted at the top of the isolation pile; two square grooves are symmetrically formed in theside wall of the isolation pile, an air bag is glued to the side wall of the isolation pile, an induction cavity is formed in the isolation pile, the induction cavity is communicated with the two square grooves, a storage box is fixedly arranged on the side, close to the induction cavity, of each square groove, and a circuit box is fixedly installed in the middle of the induction cavity. Rigid collision between a vehicle and the isolation pile is converted into elastic collision between the vehicle and the air bag when an accident occurs, so that the impact force between the vehicle and the air bag is reduced, the buffer to the vehicle is increased, the protection effect of the isolation pile is improved, and the isolation pile can be prevented from being seriously damaged; after collision, the warning lamps on the isolation piles automatically emit light and can be kept for a certain period of time, so that other drivers are reminded to avoid accident vehicles in time, and chain traffic accidents and rear-end collisions are reduced.

Disclosed is an automatic alarm unit for highway accidents. Wireless signal receivers are disposed at entries and medians of a highway at certain intervals. Outputs of the wireless signal receivers are connected with an input end of a controller. A wireless signal transmitter is arranged in each vehicle and operates under the same frequency as the wireless signal receivers. Each wireless signal transmitter is provided with a unique address code and constantly transmits an address code signal out, and the transmitting distance is smaller than one half of the distance between the two wireless signal receivers. The controller determines identity and location of each vehicle according to received address code. Alarm signal lamps are disposed on each median of the highway at certain intervals and are connected with an output end of the controller. When one wireless signal receiver receives the address code signal of the vehicle, next controller is informed of starting timing. When the set time is up and the wireless signal receives no address code signal of the vehicle, the controller turns on the alarm signal lamps behind the vehicle to inform following vehicles to slow down and stop. The automatic alarm unit for highway accidents can be used for detecting occurrence of vehicle accidents and the vehicles running at the speed smaller than the safety speed, and timely sends out alarm signals to reduce rear-end collisions of vehicles.

The invention discloses an all-around automobile rear-ending prevention early warning system. The system comprises a millimeter wave radar sensor installed on a bumper on the rear portion of an automobile, an LED display screen installed on a rear-portion automobile body of the automobile, a signal processing and early warning device installed in a cab of the automobile and a solar cell panel installed at the top of the automobile. The signal processing and early warning device comprises a solar rechargeable cell, a DSP and a Flash storage connected with the DSP, the input end of the DSP is connected with a signal conditioning circuit module and a cell electricity quantity detection circuit module, the output end of the DSP is connected with the LED display screen, a voice playing circuit module and a charging control circuit module. The all-around automobile rear-ending prevention early warning system is simple in structure, reasonable in design, convenient to realize, convenient and fast to use and operate, capable of preventing rear-ending accidents in an all-around mode, capable of saving energy, environmentally friendly, high in practicability, good in use effect and convenient to popularize and use.

The invention discloses a tunnel real-time monitoring management system and method based on traffic flow big data, and belongs to the technical field of traffic monitoring. The system comprises a traffic flow monitoring module, a vehicle detection module, a factor analysis module, a time judgment module and a cloud communication module. The output end of the traffic flow monitoring module is connected with the input end of the vehicle detection module; the output end of the vehicle detection module is connected with the input end of the factor analysis module; the output end of the factor analysis module is connected with the input end of the time judgment module; and the output end of the time judgment module is connected with the input end of the cloud communication module. According to the system and the method, the dark adaptation time and the bright adaptation time when the driver enters or leaves the tunnel can be predicted, the probability of rear-end collision accidents when the driver enters or leaves the tunnel is reduced by comparing the dark adaptation time and the bright adaptation time with the safety time, and the life and property safety of the driver can be further guaranteed.

The invention provides an automobile rear-end collision early warning apparatus and method, wherein the apparatus comprises an information acquisition module, a communication module, a micro-control module, and an alarm and brake module; the information acquisition module and the communication module are connected with the signal input end of the micro-control module; and the alarm and brake module is connected with the signal output end of the micro-control module. According to the automobile rear-end collision early warning apparatus and method, brake information of the lead automobile and front obstacle information can be obtained timely through the communication module, and the obtained information can be processed through a microprocessor, therefore, the following automobile can decelerate timely, and rear-end collisions can be reduced.

The invention discloses a vehicle emergency braking alarm system. The vehicle body control module acquires the current vehicle speed signal and vehicle acceleration signal, and outputs the alarm signal to the left and right turn signals and the horn to perform an alarm. The invention can improve the safety of the vehicle when driving , Intelligent and reasonable alarm, reminding the car behind that the current vehicle is braking urgently, reducing the possibility of rear-end collision accidents.