The invention discloses a method for curve synergy collision avoidance early warning based on dedicated short range communication. The method specifically comprises the steps that real-time position information of an automobile of a user is obtained and whether the automobile enters a curve zone or not is judged with the combination of an electronic map; if the automobile enters a curve, traveling information of the automobile of the user is broadcasted to the surroundings and whether an automobile traveling oppositely exists or not is inquired through a dedicated short range communication device; if the automobile traveling oppositely exists, traveling information and position information of the automobile traveling oppositely are obtained and combined with the traveling information and the position information of the automobile of the user, the smallest lateral distance and time needed when the two automobiles meet are predicated, and the smallest lateral distance and the time needed when the two automobiles meet are compared with a set threshold value so that collision avoidance early warning in levels can be achieved. The method for curve synergy collision avoidance early warning based on dedicated short range communication has the advantages that the smallest lateral distance and the time needed when the two automobiles meet can be predicated, interaction of the automobile conditions and the early warning information is achieved through dedicated short range communication, and therefore the purpose of curve synergy collision avoidance early warning is achieved.

Method for curve synergy collision avoidance early warning based on dedicated short range communication

The utility model relates to a test platform of a driver active safety early warning system The test platform comprises a data acquisition unit, a test working condition database, an offline analysis unit and an analysis report unit, wherein the offline analysis unit comprises an offline analysis playback sub-unit and an offline analysis judging sub-unit; the data acquisition unit acquires road environment video information and vehicle state information at different moments in the running process of an experimental vehicle in real time, and sends all of the information and stores in the test working condition database; the offline analysis playback sub-unit extracts a sample and sends the sample to a system to be tested; the system to be tested generates an early warning system in a simulation environment; the offline analysis playback sub-unit sends the early warning signal and the sample corresponding to the early warning signal to the offline analysis judging sub-unit; the offline analysis judging sub-unit analyzes the road environment video information, the vehicle state information and the early warning signal and judges to generate a judgment result, and sends the judgment result to the analysis report unit; and the analysis report unit generates lines and a document The test platform provided by the invention can be widely applied to the test of various automobile alarm systems

Test platform of driver active safety early warning system

The invention relates to an early warning method against vehicle collision based on an electronic map The method comprises that 1) GPS data, which comprises movement station information and position information, of a vehicle is obtained, and the position information of the vehicle is converted by a coordinate system and mapped into a two-dimensional rectangular coordinate system; 2) according to historical GPS data of the vehicle, the present position information of the vehicle is optimized in a Kalman filtering algorithm to predict a first present position of the vehicle; 3) according to the historical GPS data of the vehicle, information of the electronic map is combined to predict a second present position of the vehicle; 4) the first present position and the second present position of the vehicle are combined to predict the optimal position of the vehicle; and 5) the predicted optimal position of the vehicle is combined with a TCC algorithm to make early warning against collision Compared with the prior art, whether the vehicle possibly collides with vehicles in the surrounding is predicted in real time, early warning is given to a driver in real time, the driving safety and the vehicle positioning precision are effectively improved, and the method is practical and efficient

Early warning method against vehicle collision based on electronic map

The invention discloses a vehicle collision prediction method based on vehicle distance probability distribution under a highway model. The method includes the steps of a vehicle periodically (under 10Hz) broadcasts current motion statuses Beacons (speed, acceleration and GPS); the density of vehicles in the surrounding environment is dynamically calculated to build a vehicle distance distribution probability model; a minimum safety distance required to avoid collision when two adjacent vehicles emergently brake is dynamically calculated according the motion status of one vehicle and the motion status of the adjacent vehicle ahead; the collision probability (the probability for the vehicle distance being smaller than the minimum safety distance) of the two adjacent vehicles is calculated according to vehicle distance probability distribution; a multi-vehicle collision Markov chain and a state transition matrix are established, and expectation for the number of vehicle collisions on the whole section at certain time is estimated. The method is high in innovation level and extensibility; the defects of poor GPS data precision and instability in the current vehicle-location-based collision prediction algorithm are well made up; the method plays an excellent role especially in GPS satellite signal blind areas and has promising application prospect.

Collision prediction method based on vehicle distance probability distribution for internet of vehicles

The invention discloses a rear-end collision prevention system and method used for a vehicle and relates to the field of vehicle safety. The rear-end collision prevention system used for the vehicle comprises an information collection unit, a control unit and an execution unit. The information collection unit is used for collecting the surrounding information of the vehicle, and the surrounding information comprises the lane line information, the front vehicle information and the rear vehicle information. The control unit is used for receiving and processing the information and sending out an execution instruction when a rear dangerous incoming vehicle is judged. The execution unit is used for reminding a driver of the vehicle and a driver of the rear vehicle after receiving the execution instruction. On the premise of security permission, if the driver of the vehicle has no time to respond, the system spaces out the vehicle and the rear vehicle or enables the vehicle to change a lane to avoid rear-end collision of the rear vehicle. The invention further provides the corresponding method. According to the rear-end collision prevention system and method, through the control unit, the driver is timely reminded of paying attention to safe driving or the vehicle is automatically controlled to accelerate or change the lane, and rear-end collision of the rear vehicle is effectively avoided.

Rear-end collision prevention system and method used for vehicle

The invention relates to an early warning method for preventing rear-end collision with a rearward vehicle and an early warning system thereof, wherein the method comprises the following steps: 1) arranging an early warning system for preventing rear-end collision with the rearward vehicle, which comprises an information acquisition unit, a system control unit comprising a singlechip as well as an early warning execution unit; wherein, an early warning module for preventing rear-end collision with the rearward vehicle is prearranged inside the singlechip, a collision warning range and a formula calculating the collision time of the vehicles are prearranged inside the early warning module for preventing rear-end collision with the rearward vehicle; 2) acquiring the distance between the rearward vehicle and own vehicle and relative speed information and acquiring own speed information; 3) calculating time of collision TTC and a warning time threshold of collision TTC_W of the rearward vehicle and own vehicle; 4) generating a control instruction in accordance with the difference value between the calculated time threshold of collision TTC and the warning time threshold of collision TTC_W of the rearward vehicle and own vehicle as well as the prearranged collision warning range; 5) sending corresponding warning information according to the control instruction The invention can real-timely and accurately monitor the relative motion state between own vehicle and the rear vehicle that travels in the same traffic lane, thus effectually preventing the rear-end collision of the vehicles that traveling at high speed

Guizhen Yu

Papers

Pre-alarm method for preventing rear-end collision by following car