45results about How to "Achieve collision avoidance" patented technology

The present invention provides a longitudinal collision avoidance reminding and automatic following integration system and a method, and belongs to the vehicle collision avoidance field. The system comprises a collision avoidance mode selection unit, a sensing unit, a central control ECU unit, a reminding unit and an execution unit. The sensing unit obtains the type and number of front barriers, the position of a target vehicle in a lane line, the relative speed and the relative distance of an own vehicle and the front barriers, sends the obtained information to the central control ECU unit, carries out the comprehensive determination of a safe state by a D-S evidence theory, and finally determines the number of the front barriers, the relative distance vrel, the relative speed srel and an acceleration a of the own vehicle and the front target vehicle, thereby reducing the false alarm situations of a vehicle-mounted radar and a vehicle-mounted camera furthest. The central control ECU unit generates an instruction, and the reminding unit and the execution unit execute the correlated actions. The system and method of the present invention enable the false alarm rate to be reduced and the response speed and the comfort level of the drivers to be improved simultaneously, at the same time, satisfy the collision avoidance demands on different road conditions.

The invention relates to the motor vehicle anti-collision early-warning technology, discloses a motor vehicle anti-collision early-warning method based on satellite navigation, and belongs to the technical field of intelligent traffic. Satellite navigation messages and motor vehicle feature information are sent and received among vehicles in a wireless communication mode on the basis of satellite navigation signals received by the motor vehicles, a difference measurement equation is created and solved by a processing unit on the basis of the received navigation messages of the surrounding motor vehicles, the navigation messages of the current vehicle and original measurement data, and high-precision relative position and speed information of the surrounding vehicles is obtained; meanwhile, the position of the next moment is predicted. The current vehicle can sense precise positions of the surrounding motor vehicles in real time, warning is triggered before possible collisions, a driver is reminded to take corresponding avoiding measures, and anti-collision early warning of the motor vehicles is achieved.

The present invention provides a dense formation flying and collision avoidance control method for fixed-wing unmanned aerial vehicles, including: obtaining the relative navigation and positioning information of each unmanned aerial vehicle in the formation based on visual positioning, and constructing the formation configuration by using the obtained relative navigation and positioning information Maintain the control amount and the collision avoidance control amount between aircrafts; measure and avoid obstacles based on the fixed-focus monocular vision camera to obtain the obstacle avoidance control amount; determine the overall path tracking of the formation based on the relative navigation and positioning information of each UAV in the formation Control amount: Integrate the formation configuration maintenance control amount and inter-machine collision avoidance control amount, obstacle avoidance control amount, and UAV formation overall path tracking control amount to realize dense formation flight and collision avoidance control of UAV formation. The invention can realize dense formation flight and collision avoidance control of the UAV formation by integrating the formation configuration maintenance control amount, the inter-machine collision avoidance control amount, the obstacle avoidance control amount, and the UAV formation overall path tracking control amount.

The invention discloses a building interior wall waterproof and light-absorbing coating applied to indoor environments and a preparation method thereof. The waterproof and light-absorbing coating is composed of a lyotropic liquid crystal high-molecular polymer, a water-proof and light-absorbing functional component and an additive, wherein the waterproof and light-absorbing functional component isan inorganic mixed powder mainly composed of river sand, metal ceramic powder TiN-Fe and metal iron; the additive comprises a dispersant, a physical foaming agent and a toughening agent; the dispersant is hydroxypropyl methyl cellulose, the physical foaming agent is fluorocarbon; the toughening agent is liquid ethylene propylene rubber. The waterproof and light-absorbing coating has the characteristics of being warm at night and being cool in the day, and has the advantages of subdued light effect, good veneer decoration effect, good toughness, collision resistance, good wear resistance, water resistance, environmental protection and no pollution.

The invention relates to a laser radar-based active obstacle detection system and method for trains in tunnels. The system includes a laser radar, a vehicle-mounted host, a network switch, a display device, an alarm device and a braking device; the vehicle-mounted host passes through the network switch Respectively connect the lidar and the display device at the front of the car, and the on-board host is respectively connected to the alarm device and the braking device through the digital output interface; The spatial characteristics of the track area, and detect the obstacles in front of the train based on the identified track area. Compared with the prior art, the present invention has the advantages of simple deployment, light structure, low cost, good real-time performance, stable and accurate detection results, safety and reliability, and the like.

The invention discloses a concave-convex point type broadside collision prevention and freezing prevention compound structure. A second buffer pad layer, a concave-convex collision prevention plate and a first buffer pad layer are sequentially arranged in the direction from an inner ship broadside plate to an outer ship broadside plate. The hollow protruding portion and the hollow concave portion of the concave-convex collision prevention plate, the gap between the concave-convex collision prevention plate and each buffer pad layer and the gap between the concave-convex collision prevention plate and the outer ship broadside plate are filled with freezing prevention materials. The concave-convex point type broadside collision prevention and freezing prevention compound structure can sufficiently absorb energy in all the directions, and the space utilization rate is greatly improved; the structure is simple, construction is convenient and rapid, and ships in an ice zone are protected within a short period; and through sufficient utilization of the excellent characteristics of the various compound materials, the dual effects of preventing collision and freezing of the broadside structure are achieved, and the problems of collision and freezing are solved easily and conveniently.

The invention discloses a vehicle-mounted millimeter wave detection and communication integrated sensor applied to a smart traffic system. The sensor comprises a millimeter wave source, a power amplifier, a millimeter wave emission antenna, a millimeter wave receiving antenna, a low-noise amplifier, a frequency mixer, a switch, a detection signal processing circuit, a communication signal processing circuit, a modulator, a base band and a central control mechanism. According to the invention, the sensor has detection and communication functions, shares such devices as the millimeter wave source, the power amplifier, the millimeter wave emission antenna, the millimeter wave receiving antenna, the low-nose amplifier, the frequency mixer and the like, is simple and compact in structure and low in cost, and is applied to vehicle crash-proof detection and wireless interconnection between vehicles and between vehicles and roads in a modern smart traffic system. The product consistency is high, and the sensor is more suitable for large-scale production.