372 results about "Braking distance" patented technology

The invention discloses an AGV safety control method for intelligent warehousing, and relates to the technical field of intelligent warehousing, and the method comprises the following steps: constructing a global three-dimensional load distribution diagram of an automatic guided vehicle in real time through the fusion of a laser radar and an inertial measurement unit, and outputting a mass distribution matrix; based on the mass distribution matrix, millimeter wave Doppler tomography is superposed, the barycentric coordinates are dynamically corrected, and a corrected mass distribution matrix is obtained; and inputting the corrected mass distribution matrix into a braking dynamic prediction engine, and generating a prediction curve of an adaptive braking distance and braking response time in combination with online inversion estimation of a ground friction coefficient. Through the digital twin simulation and micro-pulse pre-braking strategy, the risk of inertial collision and cargo overturning is effectively reduced, a storage scheduling system is controlled in parallel, path reconstruction and driving priority dynamic adjustment are achieved, and global safety and efficient scheduling of intelligent storage are guaranteed.

The invention discloses an auxiliary driving method and device and intelligent driving equipment, and the method comprises the steps: obtaining weather information which indicates the weather type and / or road surface type of the current environment of the intelligent driving equipment; wherein the first weather type comprises one or more of a weather type for limiting visibility of a driver, a weather type for limiting sensing capability of a sensing system, or a weather type for increasing a braking distance of the intelligent driving equipment, and the first road surface type comprises a road surface type for increasing the braking distance of the intelligent driving equipment; according to the first environment information, a prompt device of the intelligent driving equipment is controlled to prompt a driving suggestion, and the driving suggestion comprises a driving strategy corresponding to the first environment information. The method can be applied to vehicles such as intelligent vehicles and new energy vehicles, and when severe weather influencing driving safety is detected, the vehicle user can be prompted about related information in time, so that the influence of the severe weather on driving is reduced.

The invention discloses a braking control optimization method and system combined with vehicle multi-state perception, and belongs to the technical field of vehicle intelligent control, and the method comprises five steps of multi-source data acquisition, data preprocessing, multi-state risk modeling, multi-target braking force distribution and braking control optimization. Based on a tire dynamic model and a semantic physical double-source weighting mechanism, generating high-precision vehicle multi-state sensing feature data; a multi-state risk modeling method based on path prediction and a physical constraint model is combined with a dynamic risk weight adjustment mechanism to calculate a comprehensive target deceleration; a multi-objective optimization function including the braking distance, the stability and the tire reliability is constructed, and four-wheel braking force distribution and coaxial cooperative control are carried out; and pressure control is executed according to the optimization result, and brake control optimization is achieved. According to the method, real-time self-adaptive adjustment of the brake control strategy can be achieved under the complex environment and multiple working conditions, and the safety, stability and response precision of braking are improved.

The invention provides a vehicle control method and related equipment. The vehicle control method comprises the steps that driving environment parameters, driving state parameters and historical characteristic parameters of a current vehicle are obtained; performing data processing on the driving environment parameters, the driving state parameters and the historical characteristic parameters to obtain target data; predicting a target distance of the current vehicle according to the target data, wherein the target distance comprises at least one of a vehicle following distance and a braking distance; and controlling the current vehicle to run according to the target distance. According to the invention, the determination precision of the following distance and the braking distance of the vehicle is improved.

The invention belongs to the field of wind power equipment transportation, and provides a wind power large piece transportation path intelligent planning system and method based on deep learning, and the method comprises the steps: obtaining terrain DEM data in a wind power plant range, and converting the terrain DEM data into three-dimensional vector data and three-dimensional vertex coordinates; receiving the three-dimensional vertex coordinates, constructing a road network topological structure representation based on a homotopy theory, extracting microscopic local features and a macroscopic global structure of a road network through a multi-level graph neural network, and realizing dynamic representation and updating of the road network based on manifold learning; receiving the road network topological structure representation and the road network features, and generating a vehicle dynamics constraint condition and a road section geometric difficulty coefficient by comprehensively considering the maximum climbing angle, the maximum turning angle, the maximum speed and the braking distance of the vehicle; and receiving the road network dynamic representation, the vehicle dynamics constraint condition and the road section geometric difficulty coefficient, and generating an optimal transportation path with balanced safety, time efficiency and transportation cost by adopting a multi-target reinforcement learning algorithm.

A vehicle interactive tail light control method, comprising: acquiring first image information of an area behind a target vehicle, and on the basis of the first image information, determining whether there is a following vehicle behind the target vehicle; when there is a following vehicle behind the target vehicle, determining driving environment information around the target vehicle on the basis of the first image information, and determining a first vehicle speed of the following vehicle and a first distance between the following vehicle and the target vehicle on the basis of the first image information; predicting a braking distance of the following vehicle on the basis of the driving environment information and the first vehicle speed, and determining whether the braking distance is greater than or equal to the first distance; and when the braking distance is greater than or equal to the first distance, acquiring preset early warning content and controlling a vehicle interactive tail light of the target vehicle to display the early warning content. Further provided are a vehicle interactive tail light control system, an electronic device, a storage medium, and a vehicle. The vehicle interactive tail light control method and system, the electronic device, the storage medium, and the vehicle can improve the accuracy and reliability of vehicle following early warning.

The invention discloses an automatic software testing system for intelligent anomaly detection, and particularly relates to the technical field of anomaly detection. According to the method, a conventional operation scene and a limit operation scene are distinguished, differential detection indexes are designed according to core requirements of the two scenes, in the conventional scene, fine deviation is quantified through the speed deviation average rate, the offset distance average value and the force control deviation value, and in the limit scene, the differential detection indexes are calculated. Performance degradation under extreme conditions is evaluated through the motor abnormal value, the vibration abnormal value and the braking distance, the problem that adaptation to different scene characteristics is insufficient in the prior art is solved, and the detection precision is remarkably improved.

An apparatus for forward collision avoidance of a host vehicle includes a first sensor configured to detect a front of a vehicle; a second sensor configured to a speed of the host vehicle; and a controller that is communicatively connected to the first sensor and the second sensor and is configured to generate a collision warning based on a braking distance of the host vehicle and a braking tendency of a driver of the host vehicle.

The invention discloses an agricultural machinery braking performance detector based on a Beidou satellite single-point positioning mode, and belongs to the technical field of braking performance detection. The agricultural machinery braking performance detector comprises a signal collector and a host, and the signal collector is internally provided with a satellite signal receiving module compatible with a BDS and a GPS; a sequence parameter extraction module, an integral distance measurement module, an error correction module, a slope calculation module and a performance evaluation module are arranged in the host; the method comprises the following steps: collecting three-dimensional motion data of a detected agricultural machine, calculating an uncorrected braking distance by using a complex Simpson integral algorithm, obtaining an error correction distance caused by single-point positioning signal drift based on a back propagation neural network, calculating the braking distance of the agricultural machine in combination with a slope correction value, and finally judging that the braking performance of the detected agricultural machine is qualified. According to the method, a ground differential base station and an external supporting assembly do not need to be erected, the problem that field detection deployment is tedious is solved, signal drifting and road slope interference are eliminated, and detection convenience and accuracy are improved.

The invention relates to the technical field of electric car braking, and discloses an electric car braking system based on multi-redundancy guarantee and self-adaptive control and a control method, and the electric car braking system comprises a redundant circuit module, a distributed driving module, an efficient transmission module and a self-adaptive control center. The reliability is remarkably improved, seamless switching of a main circuit and a standby circuit within 50 ms is achieved through a circuit dual-redundancy architecture, the distributed multi-motor driven torque reconstruction algorithm is matched, the braking efficiency retention rate under a single fault is improved, the circuit fault survival rate reaches 100%, the braking efficiency and safety are optimized, the mechanical loss is reduced to 8% or below through an efficient transmission module, and the reliability is improved. The braking distance of 100 km / h is shortened to 29 m, the energy utilization efficiency is improved, the energy consumption is further reduced through the low-friction transmission design, the dynamic adaptability and the collaboration are enhanced, a self-adaptive control center solves the multi-system instruction conflict through multi-sensor fusion and fuzzy PID adjustment with the sampling frequency of 1 kHz, the braking stability is improved by 40% or above, and the braking stability is improved by 20% or above. And the response time of the key control instruction under the emergency working condition is shortened to 75mS.

The invention provides a low-altitude traffic operation control method and system based on moving block. The method comprises the following steps: layering an airspace according to aircraft type performance and service types for the vertical take-off and landing aircraft, and distributing corresponding entering and leaving areas according to flight height layers of the aircraft; quasi-moving block is introduced into a low-altitude traffic system, an air route network and operation rules are designed, a free area-buffer area-block area three-level space structure of an aircraft is dynamically constructed according to the state of the aircraft, when the front aircraft occupies a certain block area, the first area in front of the block area is a buffer area, and the second area in front of the block area is a block area. The second zone in front of the blocking zone is a free zone, the aircraft flies in the free zone according to the current speed, and the aircraft is selected for braking in the buffer zone according to the braking distance obtained through calculation. According to the method, the braking curve is generated by dynamically dividing'free area-buffer area-block area 'and combining the braking performance, so that the safety redundancy is increased, and the safety and airspace utilization rate is improved.

The invention discloses an offshore converter station operation inspection robot obstacle avoidance method based on path planning, and belongs to the technical field of robot intelligent obstacle avoidance, and the method comprises the steps: calculating the decrease amplitude of the current wheel rail adhesive force, and obtaining the braking distance extension of a robot reaching each position point of an offshore converter station; according to the brake distance extension amount, the conversion proportion of the slip position distribution density in the high-risk area and the base plate corrosion area proportion is determined, the moving speed upper limit and the minimum steering radius of the robot are set, and an alternative route set of the high-risk area is constructed; and based on the optimal route in the alternative route set, planning the moving speed and the wheel track steering radius of the robot, and constructing an obstacle avoidance moving path. Therefore, by implementing the method, the problem that the robot is easy to deviate from the inspection target in the actual moving process due to the fact that the corrosion condition of the bottom plate is not considered when the inspection path of the robot in the offshore converter station is planned in the prior art can be solved.

The invention provides a steering wheel touch navigation prompting system and method based on multi-source data. The method comprises the following steps: acquiring position data, environment perception data and vehicle state data of a vehicle; collecting state data of a driver; fusing the data acquired by the data acquisition module and the driver state monitoring module to obtain multi-source data; inputting the multi-source data into an LSTM-based tactile semantic generation model to obtain tactile instruction parameters corresponding to the multi-source data; and outputting tactile vibration of the steering wheel in various forms according to the tactile instruction parameters. According to the invention, the tactile response time and the emergency braking distance can be obviously reduced; the information transmission efficiency is improved through rich tactile semantics; and the self-learning parameter library of the AI large model is supported to more accurately match the personalized requirements of the user.

The invention discloses a vehicle braking distance prediction method and device, equipment and a storage medium, and relates to the technical field of vehicle driving safety, and the method comprises the steps: obtaining a road surface texture data set and a friction coefficient data set, inputting the road surface texture data set to a three-dimensional road surface reconstruction model, and carrying out data separation, data noise reduction and data reconstruction. And inputting the friction coefficient data set and the reconstructed pavement texture data into an anti-skid performance prediction model to obtain a prediction result of the pavement friction coefficient, and based on the reconstructed pavement texture data and the predicted pavement friction coefficient, establishing a three-dimensional tire water skiing model and carrying out fluid-solid coupling simulation to obtain a tire-road adhesion characteristic curve of the wet and slippery pavement. And inputting the tire road adhesion characteristic curve into the vehicle braking simulation model, and calculating the vehicle braking distance on the wet and slippery road surface through dynamic simulation, so that the problem that the actual tire road adhesion characteristic change is ignored in a traditional braking distance formula is solved, and high-precision prediction of the braking distance in a complex scene in a rainy day is realized.

The invention discloses a control method, a vehicle controller and an electric vehicle, and relates to the technical field of new energy automobiles. The control method is used for improving the perception of a driver on the braking distance of the electric vehicle and comprises the step of controlling the matrix type vehicle lamp to illuminate the road surface area in front of the electric vehicle before the electric vehicle is braked in the driving process that the matrix type vehicle lamp of the electric vehicle is turned on. After the electric vehicle starts braking, the matrix type vehicle lamp is controlled to project a preset pattern on the road surface area in front of the electric vehicle, and the preset pattern is used for indicating the parking position of the electric vehicle. According to the scheme, insufficient perception of a driver in an environment with poor sight is made up, control of the driver on the braking distance of the electric vehicle is improved, meanwhile, visual prompt outside the vehicle is provided, pedestrians or vehicles outside the vehicle are helped to avoid in advance, the driving safety at night and in a low-visibility environment is enhanced, and the driving safety is improved. And a better interaction experience is provided for automatic driving and manual driving.

The application discloses a car with a friction gap of safety clamps convenient to observe, which comprises a car body and a bracket frame arranged at the end of the car body, the bracket frame is movably matched with a guide rail, a safety clamp assembly is connected to the outer side of the bracket frame, a friction gap is left between the guide rail and the safety clamp assembly, the friction gap is a brake distance reserved between the safety clamp assembly and the guide rail, and the car further comprises an observation part, the line of sight of a human eye can pass through the observation part to observe the state of the friction gap in the inner side area of the bracket frame. The car with the friction gap of safety clamps convenient to observe can avoid the limitation of the guide rail on the observation angle during the observation process, can make the observation angle directly face the friction gap, and thus the observation precision and the observation efficiency are improved.

The application discloses a kind of tunnel abnormal event-oriented risk assessment method and system, it is related to tunnel traffic safety management technical field.The method includes: collecting tunnel operating state data;Generate abnormal event basic data;According to the available sensing distance and the required braking distance of abnormal event occurrence section and its associated section, generate structure sensitive coefficient, and section correction is carried out to abnormal event basic risk value;With abnormal event occurrence section as risk source section, in combination with structure sensitive correction data, propagation direction, distance attenuation and lane disturbance state calculate the propagation risk potential field value of each tunnel section;Determine abnormal event risk assessment result.The application can convert tunnel abnormal event into section-level risk assessment result from single-point alarm, improve the accuracy of tunnel abnormal event risk influence range identification and emergency disposal decision.

The application provides a walking control method of a stacker, and relates to the technical field of warehouse transportation. The stacker comprises a walking mechanism, a counterweight mechanism, a driving mechanism, a control mechanism and an acceleration sensor. When the acceleration sensor detects that the acceleration of the walking of the stacker is less than zero, the control mechanism controls the driving mechanism to move at least one counterweight unit in the opposite direction of the advancing direction of the stacker. The counterweight mechanism adopts a plurality of counterweight units which can be independently moved relative to the walking mechanism. The center of gravity of the stacker can be accurately and flexibly adjusted according to the load condition, the running state and the like of the stacker. When the stacker is in emergency deceleration, the counterweight unit is moderately moved backward to offset the inertial moment of the forward movement of the center of gravity during deceleration, so that the center of gravity of the stacker is kept as much as possible in the middle, and the forward movement of the center of gravity of the stacker during emergency deceleration is avoided to reduce the ground adhesion force of the rear part of the stacker, thereby enhancing the ground adhesion performance of the stacker, improving the braking performance and stability of the stacker, and shortening the braking distance.

The invention discloses a parking lot ramp exit control method and system based on a limited transverse visible range, and the method comprises the steps: sensing the geometric features of a road in real time, dynamically recognizing whether a vehicle enters a ramp exit control region with the limited transverse visible range, determining the key distance of the vehicle in the transverse direction in real time if the vehicle enters the ramp exit control region, and carrying out the control of the ramp exit. The vehicle passing state is preset, the key distance is compared with the vehicle safety braking distance, the current vehicle passing state is obtained, and according to the current vehicle passing state, a hierarchical control strategy is carried out on vehicle driving behaviors. According to the method, a hierarchical control strategy is implemented on vehicle driving behaviors at a parking lot ramp exit with a limited transverse visible range, and the vehicle passing safety is still ensured under the condition of incomplete perception.

The embodiment of the invention provides a field vehicle braking distance detection method and related equipment, and the method comprises the steps: controlling a corresponding device to collect vehicle position data of a target field vehicle in a braking distance detection test after receiving a triggering signal transmitted by the corresponding device, and forming distance time sequence data; carrying out filtering processing on the distance time sequence data by adopting a median filtering algorithm, and carrying out distance change rate calculation based on the filtered distance time sequence data to obtain speed time sequence data; determining an initial system state variable at each moment based on the filtered distance time sequence data and speed time sequence data; updating the initial system state variable at each moment based on a Kalman filtering algorithm to obtain system state data; and performing calculation based on the system state data and the trigger signal, and outputting a braking distance test result of the target field vehicle. According to the embodiment of the invention, the efficiency and precision of field vehicle braking distance detection can be improved. The method can be widely applied to the technical field of field vehicle measurement.

The invention belongs to the field of road traffic, and relates to an intelligent conical barrel remote early warning device and method for an asphalt pavement. Whether vehicles in front of a controlled road decelerate or not can be analyzed and judged, and signals are provided in time. The intelligent conical barrel remote early warning method for the asphalt pavement comprises the steps that a plurality of traffic cones are placed in sequence, and the traffic cones which are initially placed measure the speed of a front vehicle. And the braking distance of the vehicle at the current speed is analyzed, and the nearest distance between the vehicle at the current position and the traffic cone is collected. According to the vehicle speed and the nearest distance, braking and / or lane changing information is sent to the vehicle. The intelligent conical barrel remote early warning device for the asphalt pavement comprises a conical shell, a lifting mechanism, an image acquisition sensor and a sound prompter. The lifting mechanism is fixed in the conical shell, and the image acquisition sensor is fixed at the top end of the lifting mechanism. And the plurality of sound prompters are arranged on a road which is used for placing the conical shell and is positioned in front of the conical shell.

The utility model discloses a kind of automobile braking system test auxiliary tool, including baffle mechanism, measuring rod mechanism and brake point prompting mechanism, each group of baffle mechanism includes L-shaped baffle, the side of the L-shaped baffle is equipped with second sliding groove, the other side of the L-shaped baffle is fixedly connected with the second sliding block corresponding with second sliding groove, by being set in the test section both sides combinable baffle mechanism, test vehicle is protected, by being set in the baffle mechanism slidably measuring rod mechanism, so that the equipment can support protection to test vehicle, prevent vehicle rollover, it is favorable to the protection of staff, by observing the moving distance of measuring rod mechanism, the brake distance exceeding is observed, it is favorable to improve the convenience of use, by setting brake point prompting mechanism convenient to move, and setting speaker body on brake point prompting mechanism, so that itself can replace observation point and prompt test driver to brake, it is favorable to improve the accuracy of test result.

The embodiment of the application provides a kind of stereo garage stacker multi-mechanism collaborative vibration control method, it is related to automation control technical field, the method is by various sensors real-time acquisition stacker operating state parameters, and calculate vibration-tension coupling coefficient;When coupling coefficient exceeds preset threshold, the dynamic adjustment of chain tension is carried out to improve structural stiffness, in the process of vehicle taking and placing, the theoretical braking distance is calculated, and when meeting triggering condition, fork buffer assembly is started in advance to realize pre-buffer control;When detecting that column inclination exceeds set threshold, reduce the running speed of lifting drive mechanism, improve chain tension and start column anti-shake mechanism to realize collaborative adjustment.The method can realize the collaborative control of stacker multi-mechanism, reduce running vibration and vehicle taking impact, improve equipment running stability and safety.

This utility model relates to a cable-operated mechanical balance valve and a two-wheeled vehicle. The cable-operated mechanical balance valve is used with a vehicle having at least two disc brake calipers. It includes a housing, a balance valve body disposed within the housing cavity, and a first cable and a second cable passing through the balance valve body. The first and second ends of the first cable are respectively connected to a first brake lever and a first disc brake caliper. The third and fourth ends of the second cable are respectively connected to a second brake lever and a second disc brake caliper. The balance valve body includes at least: a first valve core; a second valve core; and an elastic element. This utility model maintains balanced braking of the bicycle's front and rear brakes with a single cable brake lever during braking, and significantly shortens the braking distance, reducing the risk of the bicycle skidding.

The present disclosure relates to the technical field of automatic driving, and particularly relates to an automatic driving control method and device, a vehicle, a storage medium and a chip. The method comprises the following steps: obtaining an adhesion coefficient of a target road position; determining a maximum braking force of a first vehicle at the target road position according to the adhesion coefficient; determining a safe braking distance of the first vehicle according to a road condition where the first vehicle is located; obtaining a vehicle speed limit value of the first vehicle according to the maximum braking force and the safe braking distance; and controlling an automatic driving speed of the first vehicle, so that a speed of the first vehicle when reaching the target road position does not exceed the vehicle speed limit value. The technical scheme provided by the present disclosure can avoid the first vehicle from slipping at the target road position, so that the first vehicle can not exit the automatic driving mode at the target road position where it is easy to slip, the experience satisfaction of a driver to automatic / intelligent driving is improved, and the confidence of the driver to automatic / intelligent driving is increased.

The utility model discloses a coal mine traction electric locomotive sanding device which comprises a tank body fixedly installed at the front end of the running direction of an electric locomotive and a discharging pipe arranged at the inner bottom of the tank body in a communicated mode, the discharging pipe is composed of a vertical section and an inclined section integrally formed with the vertical section, and the tail end of the discharging pipe corresponds to the position of a track. A smashing box is fixedly connected to the inclined section of the discharging pipe, and two smashing cavities which are symmetrically distributed are formed in the smashing box. According to the utility model, the motor is started, the corresponding gear is driven to rotate through the rotating shaft, the other meshed gear also rotates synchronously, at the moment, the two crushing discs rotate synchronously in opposite directions, and when caked sand passes through the space between the two crushing discs, the caked sand is scattered by the blades arranged on the surfaces of the crushing discs; therefore, the discharged sand falls on the track, good friction force is generated between the wheels and the track, and the braking distance is reduced.

A motor control unit, a method, and an electric vehicle. The motor control unit is configured to control the drive motor to output a reverse torque after the automatic emergency braking system is triggered and before the automatic emergency braking system outputs the braking force in a traveling process of the electric vehicle. A direction of the reverse torque is opposite to a rotation direction of the drive motor. According to this solution, a braking distance of AEB is shortened or an AEB intervention vehicle speed is increased when a braking distance of AEB remains unchanged, to reduce a false trigger rate of AEB, and improve vehicle safety.

The utility model discloses an unmanned plane landing anti -thrust device belongs to unmanned plane technical field, the device is in the abdomen of large fixed wing unmanned plane, including anti -thrust board and two groups of drive adjusting mechanism, the anti -thrust board is paddle formula arc structure, and the bottom surface is equipped with longitudinal fairing and is made with carbon fiber composite material, and the angle on the board is equipped with pressure sensor, drive adjusting mechanism contains support, connection hanging cylinder, drive assembly, axle seat, connecting seat and connecting rod assembly, can drive anti -thrust board and realize 0 degree 90 degree angle adjustment, and sensor feedback signal reaches controller, and controller receives unmanned plane flight system landing information and controls motor, forms closed loop control. The device utilizes the airflow to generate the reverse thrust and shortens the brake distance, and the anti -thrust board is horizontal when not working and does not influence the flight, and is light in weight, and the adjustment is accurate, and is convenient to maintain, is applicable to the safe landing of large fixed wing unmanned plane.

Method for controlling a vehicle's braking system to reduce the consequences of a collision with another vehicle, characterized in that (a) the speed of the vehicle is monitored, and (b) signals from environmental sensors are evaluated and (c) if the vehicle is stationary and if the evaluated signals indicate a risk of collision with a vehicle approaching from behind, the braking system is automatically triggered, wherein the evaluation of the signals from the environmental sensors consists of a comparison of the measured distance of the vehicle approaching from behind with the assumed braking distance of the rear vehicle at the determined approach speed, wherein the signal for triggering the braking system is generated when the measured distance approaches or falls below the assumed braking distance of the approaching vehicle at the measured approach speed, wherein the braking system comprises all actively controllable braking means available in the vehicle, and if it is automatically triggered in step (c), the maximum possible braking force is generated.

The utility model provides a vehicle braking system, and aims to solve the problem that a vehicle in the prior art is braked by a single brake, so that the braking distance is too long or the brake is locked. The device mainly comprises an integrated support, a force input connector, a force output connector, a linkage disc, a front limiting hole and a rear limiting hole, wherein the front limiting hole and the rear limiting hole are formed in the linkage disc. According to the brake system, the brake cable of the handlebar and the brake units arranged on the multiple wheel sets are linked through the linkage disc; compared with a traditional brake system, the brake system is wider in applicability, can be used on two-wheel, three-wheel and four-wheel riding vehicles, and can synchronously control the drum brake unit to brake no matter whether the left handlebar or the right handlebar is independently pressed through linkage control, so that a more excellent brake effect and a shorter brake distance are achieved, and the brake efficiency is improved. And meanwhile, the defects caused by single braking such as locking, rollover and head warping are avoided.