37results about How to "Avoid sudden braking" patented technology

An adaptive fuzzy control system and method for traffic lamp is characterized by that a traffic signal controller is used to connect the traffic throughput detector with signal indicator. A cycle of a traffic signal is divided into severalr stages. Each stage has several pass rights. The time for pass and the time for inhibition in each stage are calculated according to detected traffic throughput and the time taken by a vehicle and then provided for signal indicator.

The invention discloses a major road bidirectional greenwave passage control method and a system for guaranteeing the pedestrians to cross a street safely. The method and system adopt a video tracking detecting unit for tracking vehicles on a major road and a minor road continuously. According to the method and the system, when the situation that a vehicle is about to go through a road junction on the minor road is detected, the situation that whether a vehicle on the major road is about to go through the road junction is determined immediately; when the vehicle goes through the road junction on the major road and reaches a detecting position, the vehicle on the major road takes precedence to go through, otherwise, the green light is turned on on the minor road to let the vehicle on the minor road to go through the road junction, as a result, when the vehicle on the major road goes through the road junction, the situation that the vehicle is not needed to slow down to go through the road junction safely is guaranteed, and the major road bidirectional greenwave passage is realized; besides, the method and the system can hint the pedestrians waiting for crossing the street outside a street-crossing waiting area to wait in the street-crossing waiting area for waiting for a green light signal, and hint the pedestrians lingering in the street-cross waiting area without the intention of crossing the street to leave the street-cross waiting area, avoid providing the green light signal to pedestrians without the need to cross the street, prevent the green light resource waste, and prevent reducing the road junction passage efficiency of a motor vehicle.

The invention discloses an automobile automatic braking device based on orthogonal configuration optimization. The automobile automatic braking device is formed by an obstacle distance measuring sensor, a current automobile speed measuring sensor, an automobile central control microprogrammed control unit (MCU), a brake unit and an emergency braking alarming and state displaying device. After a braking parameter corresponding to the automobile type is input in the central control MCU, the obstacle distance measuring sensor and the current automobile speed measuring sensor are started to measure the front obstacle distance and current automobile speed in real time. When the obstacle distance is equal to the suggested braking distance under the current automobile speed and a driver does not conduct braking action, the central control MCU automatically executes an interior orthogonal configuration algorithm to calculate the optimum braking force and transmits a braking instruction to the brake unit according to the obtained optimum braking force to enable the automobile to stop before the automobile is in contact with the obstacle. By means of the automatic braking device, collision accidents caused by the fact that the driver does not conduct braking timely in a driving process are avoided, the driver can obtain more braking time for buffering, and emergency braking can be avoided.

The invention discloses a control system capable of achieving two-way green wave passing of a trunk line road. When a video track detection unit detects that a vehicle needs to pass an intersection on a branch road, whether a video track detection unit of a trunk like road detects that a vehicle is to pass the intersection or not is immediately judged, if the vehicle needs to pass the intersection on the trunk like road and already achieves a monitoring position, the vehicle on the trunk line road has the priority to pass through the intersection, if no vehicle needs to pass the intersection on the trunk line road or the vehicle does not achieve the monitoring position, the color of the signal lamp is converted, the lamp for the branch road turns green to enable the vehicle on the branch road to pass the intersection, after the vehicle on the branch road passes the intersection, the lamp for the trunk line rod is immediately turned into green, then the vehicle on the trunk line road can pass the intersection safely without slowing down, and two-way green wave passing of the trunk line road is achieved in the real sense.

The invention provides a motor starting control method and system of a vehicle. The method comprises the following steps: detecting whether an under-voltage fault occurs in a vehicle; if so, determining whether the battery voltage of the vehicle is normal after preset time; if so, acquiring a current rotating speed of a motor and a target rotating speed, corresponding to a current vehicle speed, of the motor, and controlling the current rotating speed of the motor by means of rotating-speed closed-loop control; determining whether current rotating speed of the motor reaches the target speed; and if so, controlling an output torque of the motor according to a torque command sent by the vehicle. With the method provided by the invention, a phenomenon of emergency stopping caused by zero-speed starting of the motor during the under-voltage protection is avoided; and thus the stability of the system and the comfort level of vehicle driving are improved.

The invention discloses an automobile automatic braking device based on dynamic optimization. The device is formed by an obstacle distance measuring sensor, a current automobile speed measuring sensor, an automobile central control microprogrammed control unit (MCU), a brake unit and an emergency braking alarming and state displaying device. All the parts are connected through a data bus in an automobile. After a braking parameter corresponding to the automobile type is input in the central control MCU, the obstacle distance measuring sensor and the current automobile speed measuring sensor are started to measure the front obstacle distance and current automobile speed in real time. When the obstacle distance is equal to the suggested braking distance under the current automobile speed and a driver does not conduct braking action, the central control MCU acquires the optimum braking force and transmits a braking instruction to the brake unit to enable the automobile to stop before the automobile is in contact with the obstacle. By means of the automatic braking device, collision accidents caused by the fact that the driver does not conduct braking timely in a driving process are avoided, the driver can obtain more braking time for buffering, and emergency braking can be avoided.

The invention discloses an automatic parking control method, and the method comprises the following steps of judging whether a relationship between a parking depth DR and a parking space depth DL is satisfied or not when a vehicle is parked in a parking space: if so, judging whether an included angle alpha formed by a vehicle body and a long side of the parking space is less than or equal to 6 degrees or not: if so, controlling the vehicle to continue parking at a second vehicle speed V2 until parking is completed, or else, controlling the vehicle to continue to park according to the first vehicle speed V1 until parking is completed; or else, controlling the vehicle to continue to park according to the first vehicle speed V1, and continuously judging whether the relationship between the parking depth DR and the parking space depth DL meets the condition or not until the relationship meets the condition that the second vehicle speed V2 is greater than the first vehicle speed V1. By theadoption of the control method, in the initial stage that the vehicle is parked into the parking space, obstacles on the parking space parking path can be fully recognized at a low vehicle speed, thesituations of false detection and missing detection are avoided, and parking safety is guaranteed.

An emergency brake prevention type hydraulic disc brake comprises a hand brake, a brake unit and a linkage oil pipe. When the braking force is large, the flow speed of hydraulic oil in the linkage oil pipe is increased, and when the hydraulic pressure with the large flow speed passes through the buffering node, the hydraulic oil impacts the floating plate, so that the buffering spring on the lower portion of the floating plate shrinks, and the floating plate moves downwards; when the flow speed of the hydraulic oil is slowed down, the floating plate is separated from the sleeve again under the action of the buffer spring, and the hydraulic oil can keep normal flow. By limiting the flow speed of hydraulic oil in the linkage oil pipe, the emergency braking condition of the vehicle during running is avoided, and the linkage oil pipe is suitable for braking of the two-wheeled vehicle.

The invention relates to a method for automatically assisting a motor vehicle (6) in driving at an exit (2) of a main road (1), in which a current position (16) of the motor vehicle (6) is determined, in which an imminent driving at the exit (2) is identified, and in which geometry data (22) of the exit (2) is acquired from a first database (20) on the basis of the current position (16), according to the invention, current information (26) relating to a traffic lane characteristic (30) of the exit (2) and/or to a traffic situation (28) in the exit (2) is detected and/or determined from a second database (24) on the basis of the current position (16), a critical speed (vk) at which the motor vehicle (6) travels at the exit (2) is determined on the basis of geometry data (22) of the exit (2) and on the basis of information (26) relating to a traffic lane characteristic (30) of the exit (2) or to a traffic condition (28) in the exit (2), and/or a parameter (36) relating to a turn-around driving performance (q) of the motor vehicle (6) is determined, and wherein the threshold speed (vk) of the motor vehicle (6) travels at the exit (2), and outputting at least one warning signal and/or actuating the braking process as a function of the determined critical speed (vk) and/or the determined parameter (36) relating to the turning driving performance (a).

The invention relates to a rail car control system and method for a rail combining or separating area. Wherein the rail combining or separating area is provided with at least two rails, the system comprises a control center and at least two rail cars, at least one rail car travels on one rail of the at least two rails, and at least one rail car travels on the other rails of the at least two rails;when the rail car running on one of the at least two rails is driven into the rail dividing or combining area, the control center simulates virtual position information of the rail car on the other rails according to position information of the rail car on the current rail, and controls the speed and distance of the rail car running on the other rails according to the virtual position information. According to the control method and system, the rail combining efficiency can be improved, the rail combining safety can be guaranteed, and the implementation mode is simple.

The invention discloses a control method and a control device for unmanned equipment, and the method comprises the steps: obtaining the driving track data of the unmanned equipment as first track data, and predicting the driving track data of obstacles around the unmanned equipment as second track data; secondly, for each track point contained in the first track data, dividing an area in a preset range by taking the track point as a center to obtain each block around the unmanned equipment; and then, according to the second trajectory data, predicting a sequence of block codes of blocks passed by obstacles around the unmanned equipment in a future period of time, and taking the sequence as a block code sequence. And finally, predicting interaction behaviors generated by the unmanned equipment and obstacles around the unmanned equipment in a future period of time, and controlling the unmanned equipment to run. According to the method, the interaction behavior between the unmanned equipment and the surrounding obstacles can be determined, the unmanned equipment is controlled to run in advance, sudden braking of the unmanned equipment is avoided, and the stability in the running process is improved.

The invention discloses a method for controlling braking of a driving training vehicle, and the method mainly comprises the steps: obtaining the coordinates of a GPS main antenna of the vehicle and the course angle information of the vehicle in real time through vehicle-mounted double GPS antennas, and calculating the real-time coordinates of two angular points of a vehicle head and two rear wheels of the vehicle according to the distance from the GPS main antenna of the vehicle to the two angular points of the vehicle head and the distance from the GPS main antenna of the vehicle to the two rear wheels of the vehicle; the method comprises the following steps: acquiring vehicle speed data and vehicle steering wheel angle data in real time, calculating outer and inner steering radiuses of a vehicle according to the vehicle steering wheel angle data, calculating a vehicle predicted buffer length according to the vehicle speed data, and obtaining a track predicted buffer area of the vehicle by combining the steering of the vehicle; according to the track prediction buffer area and the obtained coordinate information of the obstacle, whether the obstacle is in the track prediction buffer area or not is judged, and if yes, a braking instruction is triggered. According to the invention, pre-judgment and timely intervention of danger can be realized by calculating the pre-collision area through trajectory prediction, and the user experience feeling of driving simulation of trainees is improved.

The invention relates to the technical field of riding braking, and discloses man-machine interaction type intelligent protective equipment which comprises a frame, a rotating shaft and a faucet; the frame is movably connected with the rotating shaft, steel chisels are evenly and fixedly mounted on the rotating shaft, and hubs are fixedly connected to the top ends of the steel chisels. Through the arrangement of the steel chisels, magnets and a brake device, during riding, the steel chisels are driven to cut in a magnetic field formed by the magnets to form current, and the current is transmitted to an electromagnetic coil, so that two opposite brake pads generate suction force and gradually approach a brake disc, and the distance between a brake column and the brake disc is shortened; meanwhile, hydraulic oil in a liquid storage tank is sucked into a fixed tank through a one-way valve to abut against the brake pads and prevent the brake pads from returning; and when the vehicle speed reaches a certain value and braking is carried out, a rear brake is pinched with the hand, hydraulic oil in a first liquid supply device is rapidly pressed into the fixed tank, the pressing stroke is reduced, braking is rapid, the reaction rate is increased, and the pressing force is increased.

The invention discloses a driving warning device used on a highway in a hazy day comprises a support, a driving warning indicator and a solar cell, wherein the driving warning indicator is provided with an infrared communication module, a laser distance measurement module and an antenna; the infrared communication module is used for communication with an infrared communication handheld console; the laser distance measurement module is used for measuring the driving speed of a vehicle on the highway; and the antenna is used for communication among all driving warning devices. When the driving warning device used on the highway in the hazy day is mounted, the driving warning devices are fixedly arranged on two sides of the highway at equal intervals, and initial parameters of the driving warning devices are set through the infrared communication handheld consoles; and when the driving warning devices used on the highway in the hazy day operate actually, the devices operate in a linkage manner, different forms of indication cursors are formed on the right side of a road according to the distances among vehicles driving on the highway and the speeds, so that drivers are assisted in judging the distances to front and rear vehicles, and rear-end collision accidents easily caused between the vehicle and the front vehicle because of sight blocking by haze are avoided.

The invention discloses a vehicle-road cooperation automatic driving system based on a 5G and V2X intelligent lamp post. The system comprises a road end module, a vehicle-mounted terminal module and a cloud control module. The road end module comprises a plurality of intelligent lamp poles arranged on the two sides of a driving road, and a 5G base station, a road side unit RSU and a road side MEC unit are integrally arranged in each intelligent lamp pole; the vehicle-mounted terminal module comprises an automatic driving control system, a vehicle-mounted unit OBU, a vehicle-mounted MEC unit and a high-precision positioning module; the cloud control module comprises a universal edge computing server deployed in a cellular network base station machine room; the road side MEC unit and the vehicle-mounted MEC unit are in communication connection through a V2X vehicle networking system; and the roadside MEC unit, the vehicle-mounted MEC unit and the universal edge computing server realize communication through a 5G network to form a vehicle-road cooperative control system of vehicles, roads and cloud. According to the invention, traffic participants in dynamic and static blind areas/shielding, remote scenes and other scenes can be accurately identified, positioned and predicted, and the risk of sudden brake or accident occurrence of the vehicle is avoided.