19results about How to "Driving safety" patented technology

A mine dump truck wet disc brake hydraulic system, including main control valve, one end of main control valve is connected pressure oil source, the other end is connected front brake system and middle and rear brake system, front brake system includes brake pedal, front axle proportional control valve group, front axle brake valve group and front brake cylinder, middle and rear brake system includes brake pedal, slow running valve, middle and rear axle brake valve, rear axle proportional valve group, relay valve group, rear axle brake cylinder and middle axle brake cylinder, the utility model discloses a mine dump truck wet disc brake hydraulic system can realize manual operation brake and line control remote brake function, reaches unmanned operation's requirement, is used for unmanned vehicle or auxiliary driving, and in order to adapt to the distance of middle and rear axle of three axle vehicle and the distance of main brake valve group is longer, two relay valve groups are added, brake corresponding speed is improved, faster brake response is realized, makes travel more safe.

This invention discloses a method and apparatus for determining the power limit value of a power battery. The method includes: acquiring target operating condition data of the vehicle; determining a first power limit ratio value of the power battery in a pulse temperature rise table based on a first temperature value and the target temperature value of the power battery; determining a second power limit ratio value of the power battery based on the vehicle's power performance target data and target evaluation data; determining the minimum value between the first and second power limit ratio values ​​as the target power limit ratio value of the power battery; and determining the power limit value of the power battery based on the target power limit ratio value and the allowable power value of the power battery. This invention solves the technical problems that high-temperature power limit protection methods for batteries cannot cover operating conditions with fast vehicle speed response, and cannot simultaneously consider the safety of battery and vehicle use, vehicle power performance, and user experience.

The application discloses an interconnected automatic driving decision-making method based on cooperative perception and adaptive information fusion, and mainly solves the problem that the existing automatic driving decision-making is less applicable under the condition of complex road structure and traffic light information. The method considers a multi-lane traffic environment under a world coordinate system, wherein a mixed traffic flow composed of interconnected automatic driving vehicles and human-driven vehicles is formed. Each CAV can obtain surrounding multi-modal environment features (such as lane information, HDV vehicle information and red-green traffic light information) through a vehicle-mounted sensor and an offline high-precision map. With the help of vehicle-to-vehicle communication, the CAVs can share their information and make decisions within a specified time step t. The goal of the method is to generate speed decisions and steering angle decisions for the CAVs. With such action decisions, the automatic driving vehicles can safely and effectively travel along a specific route, while maximizing the comfort of passengers and minimizing the impact on surrounding HDVs.

The application relates to the technical field of virtual driving and provides a virtual driving control method and device and a storage medium. An acceleration instruction for a target vehicle is received and responded to, the vehicle speed of the target vehicle under at least two road segment materials is accelerated according to a preset strategy, a first speed of the vehicle under the target driving mode is acquired in real time, when the first vehicle speed is higher than a first threshold value, it is determined that the control of the steering wheel on the driving direction of the target vehicle meets a preset deviation condition within a preset time length, and first prompt information for prompting a user to control the vehicle speed of the target vehicle is generated and output. It can be seen that through simulation under the road segments, it can be verified that in the virtual driving scene, the faster the vehicle speed is, the greater the force feedback coefficient of the steering wheel is, the driving direction of the target vehicle can be controlled to be kept within the controllable range of the steering wheel by adjusting the vehicle speed, that is, the deviation of the steering wheel on the driving direction of the vehicle is reduced, and the driving of the vehicle can be safely controlled.

The application provides a chip junction temperature estimation method, device and equipment of a power module and a medium, the method comprises the following steps: acquiring physical parameters, reference point temperature and loss power of each chip in the power module; establishing a simulation model based on the physical parameters; applying the loss power to the simulation power module in the simulation model to obtain simulation junction temperature data; obtaining a thermal impedance matrix based on the simulation junction temperature data, the loss power and the reference point temperature; establishing a thermal network model for estimating the chip junction temperature; comparing the output result of the thermal network model with the actual junction temperature result of the test to correct the thermal impedance matrix; predicting the life of the power module to obtain the aging relationship between the life and the thermal impedance matrix; and estimating the junction temperature of the chip of the power module with different life cycles according to the aging relationship; the reliability and stability of the chip junction temperature estimation are improved, the accuracy of the chip junction temperature estimation is ensured, and the automobile can be safely and reliably driven.

The application provides a vehicle atmosphere lamp control method and system, and relates to the technical field of intelligent cabin control.The method comprises the following steps: vehicle power-on initialization, reading vehicle interior atmosphere lamp initialization parameters, and outputting initialization brightness of the vehicle interior atmosphere lamp according to the initialization parameters; collecting vehicle gear signals and light state signals, obtaining current gear information and environment information of the vehicle; judging whether a driver input custom atmosphere lamp brightness reduction ratio instruction is received, generating vehicle interior atmosphere lamp brightness control decisions according to preset rules according to the current gear information and the environment information of the vehicle; and outputting target brightness of the vehicle interior atmosphere according to the vehicle interior atmosphere lamp brightness control decisions.The application realizes the synergistic linkage of individual preference, vehicle gear and ambient light, effectively reduces glare interference in the driving gear, keeps the cabin atmosphere in the parking gear, and takes into account driving safety and driving experience, and is suitable for intelligent control of atmosphere lamps of various intelligent vehicles.

The invention discloses a traffic participant trajectory prediction method and device, electronic equipment and a storage medium, and relates to the technical field of automatic driving. According to the method, surrounding traffic participant information, self-vehicle state information and environment information are obtained, a self-vehicle surrounding lane map is constructed, and target traffic participants are screened to obtain position parameters of the target traffic participants; associating the target traffic participant with the lane map, constructing a corresponding coordinate system, and performing coordinate projection on the position parameters; identifying a driving intention according to a preset rule based on the continuous frame quantization parameter, setting a polynomial boundary condition and determining a fitting coefficient; using the fitting coefficient to obtain transverse and longitudinal position coordinates of the target traffic participant in a future preset duration through polynomial fitting, and generating an initial driving track; and after the initial trajectory is processed, outputting a final prediction trajectory. According to the invention, the driving intention recognition accuracy and trajectory prediction reliability of traffic participants can be improved, and the method is adaptive to the trajectory pre-judgment demand of automatic driving in a complex road scene.

The anti-skid device comprises a main support, a limiting block, an induction blocking piece, a protection plate, a telescopic spring, a groove, a baffle and a supporting column A are arranged in the front portion of the main support, and an air blower is arranged on one side of the rear portion of the main support; a telescopic rod A and a telescopic rod B are arranged in front of and behind the main support, the telescopic rod A is located on the lower portion of the protection plate, a supporting frame is arranged at the lower end of the telescopic rod A, a plurality of wheel carriers are arranged on the lower portion of the supporting frame, and each wheel carrier comprises a pressure reduction supporting frame, a roller A, a buffering support, a conical surface anti-collision stop block and an ice breaking conical head. The lower end of the telescopic rod B is provided with a supporting rod and a shock absorber, the lower end of the supporting rod is provided with a triangular heat storage box, the heat storage box is arranged on the lower portions of three slopes, and the upper portion of the rear slope of the heat storage box is provided with a three-way tail gas pipe, a smoke exhaust outlet and a gas guide pipe. The anti-skid device for the vehicle in the ice, snow and rain weather can timely deal with the driving problem in the snow and rain weather so as to avoid accidents, so that the driving is safer in the snow and rain weather, and the anti-skid device has very high practical value and popularization value.

The utility model relates to the field of vehicle calliper, disclose commercial calliper body column pin hole waterproof calliper, including the calliper body (1), the left side and the right side of calliper body (1) all are provided with column pin hole (2), install the column pin in column pin hole (2), still include dust cover (3), dust cover (3) cover in the upper of column pin and correspond to insert in column pin hole (2) inside, the inner wall of column pin hole (2) is set up with sealing groove (4), sealing groove (4) is matched with sealing element (5), dust cover (3) and sealing element (5) close contact, sealing element (5) is in extrusion state. The dust cover not only has the advantage that the sealing is reliable, but also can increase the friction, increase the reliability of dust cover fixed, avoid the jolt drop.

The invention relates to the field of municipal engineering, in particular to a protection type width limiting device for municipal engineering. The width of the two sides can be rapidly adjusted when a vehicle passes by, the vehicle can be more effectively protected, and the safety of the vehicle during running is effectively improved. A protection type width limiting device for municipal engineering comprises a fixed seat, a sliding frame, a bottom plate and the like. Each fixing base is connected with a sliding frame in a sliding mode, and each fixing base is fixedly connected with a bottom plate. The downward pressing frame moves downwards to drive two pushing blocks to move downwards through a connecting frame and a moving frame, a stop rod is pushed to move towards the side far away from the deceleration strip, the stop rod moves to drive guide rods to move together, the two guide rods move to drive sliding frames to move, then the two sliding frames move towards the sides far away from each other, the passing space of an automobile is increased, and the safety of the automobile is improved. And the automobile can pass quickly.

The embodiment of the application provides a vehicle induction data generation method, comprising: generating a plurality of map feature data of a target road section according to map data of the target road section, a plurality of vehicle behavior data and a plurality of traffic flow interaction data; determining a map feature data set of each vehicle behavior data according to a mapping relationship between each vehicle behavior data and each map feature data, wherein each map feature data set comprises a plurality of map feature data; and performing matching on the map feature data set of each vehicle behavior data and the map data of the target road section to generate target vehicle induction data of the target road section. The embodiment of the application provides a vehicle induction data generation method, device and electronic equipment, which can generate vehicle induction data to improve the accuracy of the map, thereby improving the humanized driving function of the autonomous vehicle.

The application relates to the technical field of vehicle-mounted data processing, and provides a vehicle-mounted multi-source data fusion processing method and system, which comprises the following steps: according to logical association, identifying contradictory items existing in an environment understanding graph structure, and quantifying the degrees of the contradictory items to obtain contradiction degrees; obtaining the degree of conformity between a preliminary environment interpretation result and a preset rule; according to reliability scores, contradiction degrees and the degree of conformity, judging the root sources causing the contradictory items; applying weight reduction processing to the root sources to reduce the reliability scores corresponding to the root sources, and updating the confidence labels of nodes or logical associations of the environment understanding graph structure based on the reduced reliability scores to obtain the weight-reduced environment understanding graph structure, so as to complete vehicle-mounted multi-source data fusion processing; the nodes of the environment understanding graph structure are environment element nodes, which are used for representing the categories and spatial attributes of corresponding environment elements. The application has the effect of improving the decision-making capability of an intelligent driving vehicle.

This utility model discloses a crack-resistant cold recycled pavement structure, belonging to the field of recycled pavement technology. Key technical features include a supporting base course, a cold recycled base course on top of the supporting base course, a crack-resistant transition layer on top of the cold recycled base course, a drainage bonding layer on top of the crack-resistant transition layer, and a functional surface layer on top of the drainage bonding layer. Through the combined design of the crack-resistant transition layer, fiberglass grid, and emulsified asphalt bonding layer, the pavement's crack resistance is significantly improved. The crack-resistant transition layer has good flexibility, buffering temperature stress and vehicle load impact. Furthermore, the fiberglass grid, embedded in the center of the crack-resistant transition layer, utilizes its high strength to disperse stress at the crack tip, preventing upward reflection of base course cracks. Combined with the emulsified asphalt bonding layer, it enhances the bonding force between structural layers, preventing interlayer slippage and the generation of new cracks, thus reducing the overall occurrence of reflective and longitudinal cracks.

This invention discloses a seismic geological guidance method for safe and efficient tunneling of tunnel boring machines (TBMs) in coal mines, comprising the following steps: acquiring seismic data and processing its undulations to obtain a seismic time profile; loading the designed shield line and cutting a seismic time profile of the shield line along the designed shield line on the seismic time profile; loading the borehole positions and obtaining the depth values ​​of each target layer based on the borehole positions; performing a detailed interpretation of the seismic time profile of the shield line based on the depth values ​​to obtain a time-structure map and obtaining the inter-layer velocity of each target layer at different borehole positions; performing gridding based on the inter-layer velocity to obtain a velocity profile map of the designed shield line; and performing time-depth conversion between the time-structure map and the velocity profile map of the designed shield line based on the inter-layer velocity to obtain a depth-structure profile map, accurately determining the spatial location of the target layer. This invention achieves the goal of improving the accuracy of the spatial location of the layer in the tunneling profile of the TBM.

A fault-tolerant control method for actuator failure in an electric vehicle stability system includes the following steps: collecting vehicle driving state and actuator information; constructing a vehicle driving state feasible region using the tire force feasible region and the friction circle guidance range; calculating reference values ​​of state variables based on a vehicle reference model; using the reference values ​​and actual values ​​of the state variables as inputs to the upper-level vehicle motion controller; obtaining the resultant force and resultant torque of the current operating condition under the constraints of the vehicle driving state feasible region by model predictive control; allocating tire force under the constraints of the tire force feasible region; introducing tire force changes caused by actuator failure into the vehicle dynamic controller reconstruction; firstly obtaining the fault-tolerant feasible region of tire force and the fault-tolerant feasible region of the vehicle driving state after the failure; using the fault-tolerant feasible region as a new constraint for fault-tolerant control; finally, for situations where fault-tolerant control cannot control, reshaping the reference input to ensure the vehicle can drive safely to the maximum extent.

The utility model discloses an electronic mechanical brake, including installation support, tongs, brushless motor and transmission, and installation support includes front dog and rear dog, and the outer brake shoe is slidably arranged on the front dog, and the inner brake shoe is slidably arranged on the rear dog, and the brake disc is arranged between the front dog and the rear dog, tongs are slidably connected with installation support through two guide rods, and the piston cylinder is equipped on tongs, and the piston cylinder is equipped with the piston that can axially slide and is connected with the output of transmission, and the hook portion that is outside the outer brake shoe is equipped with the front end of tongs, and the rear end of tongs is equipped with two tongs support ears, and one of guide rods is connected between one tongs support ear and the rear dog of installation support, transmission includes transmission casing, and the brushless motor is installed on transmission casing, and transmission casing is fixedly connected with the rear end of tongs through at least three screws.

The application provides a double-side widening transition structure of a small-radius curve road section, which comprises the following steps: setting a linear smooth widening soil shoulder edge line and a widening driving lane edge line on the inner and outer sides of the original soil shoulder edge line and the original driving lane edge line of an original road, so that unilateral high-slope excavation and high-fill protection work and the amount of demolition can be effectively reduced during construction; the double-side widening transition structure comprises the double-side widening transition structure, which can better adapt to small-radius curve roads and regions with many buildings in urban centers, and is more conducive to driving safety and comfort; a double-side widening method is used to obtain the double-side widening transition structure. The double-side widening transition structure, the road section and the method of the small-radius curve road section are used to solve the problems of large engineering investment scale, large project construction difficulty and unguaranteed construction quality caused by the widening of the inner side of the small-radius curve road in the prior art.

The utility model discloses a railway flat car shallow spherical center plate fixing device which comprises a through hole (1a) formed in a transition trolley (1), a through pin (2) is arranged in the through hole (1a), the top of the through pin (2) upwards extends out of the through hole (1a) and is fixedly provided with a through pin cap (3), and the bottom of the through pin (2) downwards extends out of the through hole (1a) and is provided with a through pin hole (2a). An adjusting gasket (4) is arranged between the pin penetrating cap (3) and the upper surface of the transition trolley (1); a fixing pin (5) is connected in the pin penetrating hole (2a) and comprises a vertical clamping block (51) and a horizontal inserting block (52) which are connected, the horizontal inserting block (52) penetrates through the pin penetrating hole (2a), one end, extending out of the pin penetrating hole (2a), of the horizontal inserting block (52) is provided with a fixing pin hole (5a), and a fixing pin shaft (6) is connected in the fixing pin hole (5a). The device has the advantages of effectively preventing the center plate penetrating pin of the railway flat car from shifting and deforming, and realizing safe driving.