72 results about "Braking distance" patented technology

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 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 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.

This application provides a method, device, and system for determining braking anomalies. The method includes: receiving multiple real-time decelerations of a vehicle during a target braking action time, the multiple real-time decelerations being arranged in chronological order, with the first real-time deceleration being the initial deceleration and the last real-time deceleration being the target deceleration; determining the target braking distance corresponding to each real-time deceleration during the deceleration from the initial deceleration to the target deceleration based on the multiple real-time decelerations and the target braking action time, and constructing a target braking curve based on the multiple real-time decelerations and the multiple target braking distances; and determining whether the vehicle has a braking anomaly based on the target braking curve and a preset braking curve, thus solving the problem in the prior art of difficulty in timely detecting abnormal braking performance of a vehicle.

The application provides a brake master cylinder with a stepped structure, which comprises a cylinder body, a cavity penetrating through the left end of the cylinder body, the cavity being composed of a left cavity and a right cavity, the diameter of the left cavity being larger than that of the right cavity, a piston one being connected to the right cavity, a piston two being connected to the left cavity, a spring one being arranged between the piston one and the bottom of the right cavity, a spring two being arranged between the piston one and the piston two, a limiting slot penetrating through the middle part of the piston one being arranged, a limiting rod being connected to the limiting slot, the limiting rod being fixedly connected to the cylinder body, a through hole being arranged on the right end surface of the piston one and being communicated with the limiting slot, a top rod being connected to the through hole and being movable leftward and rightward, a sealing part being arranged on the right end of the top rod and being capable of sealing the through hole, and a spring three being arranged to apply a leftward elastic force to the top rod. Under the same conditions, the brake master cylinder G shortens the braking distance of the automobile, improves the braking effect and reduces the accident risk when the brake in the cavity fails.

The application discloses a brake footboard device and a vehicle, which comprises a mounting bottom plate, a brake valve, a brake footboard mechanism and an angle detection module. The valve top of the brake valve extends upward from the mounting bottom plate. The brake footboard module of the brake footboard mechanism is installed on the mounting bottom plate through a first overturning installation module. The pressing member is arranged on the lower side of the brake footboard module and faces the valve top. The brake footboard module overturns downward and drives the pressing member to press the valve top under the action of the foot pedal force. The brake footboard module overturns upward and returns to the initial posture under the condition that the foot pedal force is removed. The angle detection module is used for brake control of the transmission system of the vehicle according to the downward overturning angle of the brake footboard module. The pedal stroke and the brake force curve are close to the ideal linear relationship, the power transmission path is simple, the energy loss is small in the transmission process, the brake force is prevented from being greatly attenuated, the advantages of electric control and mechanical brake are combined, the brake force is quickly improved, and the brake distance is shortened.

The present application relates to the technical field of brake distance measurement, in particular to an intelligent measuring device for brake distance of a fall arrester based on an image sensor. The device comprises a fixed assembly, which comprises, from inside to outside, a shell, a diaphragm and a guide layer. The inner side of the guide layer is provided with a movable assembly, which comprises a sleeve. A plurality of first guide grooves are evenly formed on the inner side of the guide layer along the axial direction. A plurality of second guide grooves are formed on the side wall of the sleeve and are matched with the first guide grooves. A plurality of rolling balls are arranged in the second guide grooves. The high-viscosity damping liquid inside the diaphragm is stirred by the rolling balls, thereby enhancing the damping effect between the diaphragm and the rolling balls and absorbing the vibration energy generated when the sleeve is impacted. The device prevents poor repeatability of brake distance measurement of the fall arrester due to structural deformation under impact and improves the measurement accuracy of the device.

The application discloses a kind of emergency brake control method and system of trackless trolleybus, method includes: if receiving brake signal, detect current speed v and target distance relative to target position;If the target distance is less than the first threshold value of pre-set and current speed v is greater than the second threshold value of pre-set, function relationship of brake distance s and brake force distribution coefficient is constructed as target function according to target strategy, also obtain the instability working condition information of each carriage, configure the local constraint of the target function according to the instability working condition information;Optimal value is solved to the target function configured with local constraint, and the brake force distribution coefficient of each carriage is obtained, and the corresponding carriage is braked according to the brake force distribution coefficient, until the vehicle stops running.The application guarantees that trackless trolleybus is safely and stably braked, and the shortest brake distance is reached.

Embodiments of the present application provide a vehicle control method, a vehicle, a storage medium and an electronic device. The method comprises: obtaining a longitudinal distance between the vehicle and a target obstacle; in response to the longitudinal distance being less than a safe braking distance, determining a target deceleration of the vehicle according to a real-time acceleration of the vehicle and a preset transition duration, wherein the preset transition duration is used to represent a duration required for the vehicle to adjust from the real-time acceleration to the target deceleration; and controlling the vehicle to avoid the target obstacle based on the target deceleration. The present application solves the technical problem of poor emergency obstacle avoidance effect of an auxiliary driving system in the related art.

The utility model relates to electric bicycle detection device technical field, concretely relates to electric bicycle brake distance detection device, including the brake trigger module of installation in electric bicycle brake handlebar part, one side of brake trigger module is provided with rectangular pole, the bottom fixed mounting of rectangular pole has fixed base, the upper and lower two symmetrical fastening bolts fixed between rectangular slipper and rectangular pole are connected with the sliding of rectangular pole, the front side of rectangular slipper is fixedly installed with laser ranging sensor, the front side of rectangular slipper still is fixedly installed with infrared lamp, the upper surface of fixed base is fixedly installed with water storage tank, the top of water storage tank is fixedly installed with the adding pipe for adding water, is screwed on adding pipe with screw cap. The utility model is beneficial to the detection operation of brake distance, and convenient operation, use.

The present application relates to the technical field of tire performance evaluation, and particularly relates to a passenger car tire dry road grip evaluation method, system, storage medium and software product. The method is applied to dry high-asphalt road surface, and a candidate tire is tested at a speed of 100 km / h to 0 ABS braking distance under a specified air pressure and load. A "reference tire-candidate tire-reference tire" clamping cycle is used to obtain the road / environment drift amount, the candidate data is drift corrected by time interpolation, and a normalized dry road grip index is calculated and output. The method can significantly reduce the test dispersion caused by time-varying factors, and improve the comparability and discrimination sensitivity of cross-period, cross-site and cross-batch results.

This application provides a vehicle emergency braking control method, vehicle, and related equipment, belonging to the field of vehicle braking control technology. The method determines whether an emergency braking condition is currently occurring based on collected sensor data. If an emergency braking condition is present, it determines the current collision risk value based on the relative distance to obstacles and the theoretical braking distance. Based on this collision risk value, the vehicle's aerodynamic components are adjusted to improve the overall vehicle's drag coefficient. The higher the current collision risk value, the higher the drag coefficient corresponding to the target state of the aerodynamic components. This solution considers the relative distance to obstacles during emergency braking, calculates the risk value that may still result in a collision under emergency braking conditions, and then adaptively adjusts the aerodynamic components based on this risk value, thereby improving the safety and stability of the vehicle's emergency braking process.

The current traffic signal system fails to provide drivers with clear information when signals change, leading to frequent "dilemma zone" issues at intersections. A "dilemma zone" refers to a situation where a driver faces a conflict over whether to stop or proceed when a yellow light turns on; major problems include rear-end collisions caused by sudden stops and traffic accidents resulting from stopping midway through intersections. This risk is particularly high for large vehicles due to their longer braking distances, yet existing traffic signal systems have limitations in addressing these issues. The present invention comprises the steps of: supplying power to a yellow light before switching from a blue light to a red light; setting a timer value when power is supplied to the yellow light and displaying the timer value on the yellow light; displaying the changed timer value as a number on the yellow light as the timer value changes; and cutting off power to the yellow light and supplying power to the red light and resetting the timer value when the timer value becomes zero.

The application provides a safety risk early warning method and system based on brake performance evaluation, belonging to the field of vehicle brake performance evaluation and safety technology, and the method comprises the following steps: acquiring brake system operation data, vehicle motion state data, environment perception data and external scene data of a vehicle; calculating a current brake performance evaluation index based on the brake system operation data and the vehicle motion state data; the current brake performance evaluation index comprises a brake response time, a brake distance and a brake stability index; performing feature fusion processing on the brake response time, the brake distance and the brake stability index to obtain a brake performance feature vector; in response to any current brake performance evaluation index being less than a corresponding preset performance index threshold, calculating a safety risk level based on the brake performance feature vector, the environment perception data and the external scene data through a safety risk model; and executing a corresponding risk early warning strategy according to the safety risk level.

The invention relates to a method for operating an autonomous vehicle (1). According to the invention, the vehicle (1) is automatically changed to the adjacent free lane (F2) on the outside of the curve when it is identified that: - the vehicle (1) approaches a curve (K); - there is an adjacent free lane (F2) on the outside of the curve for the vehicle (1); - there is a field of view limitation of at least one acquisition unit (2) of the environmental sensor system in the direction of travel of the vehicle (1) due to the curve (K) ahead; and - there is an extended braking distance of the vehicle (1) and / or other vehicles and / or a reduced ground adhesion in the curve due to road conditions relative to a predetermined target value. The invention also relates to a device for carrying out such a method and a vehicle (1) comprising such a device.

The application discloses a four-way vehicle anti-tipping motion control method and system with dynamic load rate estimation, which realizes real-time acquisition of the load rate of a jacking motor and the load rate of a driving motor, respectively carries out low-pass filtering, and estimates the weight of goods through linear mapping and driving load compensation; the height of the goods is acquired, the maximum acceleration is calculated based on a tipping moment model, and the maximum jerk which decreases with the increase of the weight and the height is obtained through a two-dimensional lookup table model; an S-shaped speed curve planning and real-time braking distance judgment are adopted to start emergency braking correction in the case of insufficient braking. The application realizes adaptive load steady start-stop control, effectively prevents goods from tipping, and improves operation safety and efficiency.

The application relates to the technical field of anti-collision detection, in particular to an anti-collision detection and early warning method and system for underground trackless equipment, which comprises the following steps: acquiring the hinged angle of the underground trackless equipment and the linear speeds of the left and right front wheels in real time; calculating the steering driving pressure difference, combining the hinged angle at each sampling time, and the difference between the theoretical linear speed difference and the actual linear speed difference of the left and right front wheels to construct the wheel speed slip deviation; calculating the echo radial speed of each scanning point; screening all obstacle candidate points based on the correlation degree of the steering driving pressure difference and the echo radial speed, and then obtaining the obstacle distance at the current sampling time; reducing the deceleration by using the wheel speed slip deviation, then calculating the minimum safe braking distance at the current sampling time, and comparing the minimum safe braking distance with the obstacle distance to determine whether to perform obstacle early warning. The above method improves the early warning accuracy of obstacles in narrow spaces and the braking safety on wet and slippery roads.

This invention provides a dynamic optimization method for train braking power distribution parameters based on the SSA algorithm, relating to the field of train braking control. The method includes the following steps: S1: Obtaining train operating status information; S2: Constructing an objective function for electro-pneumatic composite braking performance; S3: Importing the European standard braking model formula into the objective function; S4: Initializing the parameters of the sparrow search algorithm; S5: Optimizing the electro-pneumatic parameters using the sparrow search algorithm; S6: Executing electro-pneumatic composite braking control based on the optimized electro-pneumatic parameters. This invention uses the sparrow search algorithm to appropriately select the hyperparameters of the braking process for European standard braking trains, improving the algorithm's prediction accuracy and further balancing the braking distance, ride comfort, and energy efficiency indicators of train braking, providing a theoretical basis for optimizing the braking distance of high-speed trains.

The present application relates to the technical field of aircraft anti-skid brake, in particular to a kind of self-adapting brake steady deceleration rate adjusting method based on aircraft brake energy, the method includes obtaining the brake energy state when aircraft starts braking according to aircraft ground speed and aircraft total weight signal;According to the wheel speed and the wheel speed after 1 second, the brake deceleration rate in 1s is obtained;According to the brake energy state when aircraft starts braking and the brake deceleration rate in 1s, brake pressure is adjusted until the wheel steady deceleration rate is reached.The present application obtains steady deceleration rate target range according to aircraft brake energy, realizes the control to brake pressure according to deceleration rate target range, can improve brake deceleration rate, and reduce braking distance.

This invention relates to the field of robotic arm control technology and discloses a dynamic control method for the safe operating distance of a robotic arm based on radio frequency electromagnetic wave sensing and real-time decision-making. The method includes: acquiring real-time dynamic state data of the robotic arm's end effector and the straight-line distance to the nearest obstacle; constructing a dynamic safe braking distance model based on the dynamic state data; calculating a dynamic safety threshold matching the current motion state; calculating the spatial margin between the obstacle's straight-line distance and the dynamic safety threshold; and performing hierarchical decision-making control based on the interval of the spatial margin. This invention calculates the dynamic safety threshold using a dynamic safe braking distance model, eliminating the risk of false triggering and collisions caused by fixed thresholds. Furthermore, it replaces the traditional rigid emergency stop with a multi-level compliant avoidance strategy using hierarchical decision-making control, thereby maximizing the stable operation of production equipment while balancing operational efficiency and safety.

The application discloses an emergency braking method for an intelligent automobile, and the method comprises the following steps: when a preset driving action of the intelligent automobile is triggered, a driving log is newly created and vehicle characteristic data is collected; based on load characteristic data and road surface characteristic data of the intelligent automobile, a braking analysis model corresponding to the driving log is obtained; based on the braking analysis model, the driving characteristic data is analyzed, a plurality of emergency braking distances and an emergency braking action corresponding to each emergency braking distance are obtained; the distance of an obstacle in front of the intelligent automobile and each emergency braking distance are compared in real time, and it is determined whether there is a collision risk; if yes, an alarm duration is obtained to perform risk warning; when the risk warning reaches the alarm duration and there is still a collision risk, the distance of the obstacle in front at this time is used to confirm a target emergency braking distance and a corresponding emergency braking action, and the target emergency braking distance and the corresponding emergency braking action are directly executed. The technical problem that the driving experience is poor due to frequent and extensive emergency braking of the intelligent automobile in the prior art is solved.

The utility model belongs to vehicle braking technical field discloses a one -tow one master -slave collaborative line control brake system, including main vehicle and trailer, be provided with main vehicle brake pedal, pedal sensor, main vehicle controller, at least one main vehicle tire sensor and main vehicle brake actuating mechanism on main vehicle, be provided with trailer controller, at least one trailer tire sensor and trailer brake actuating mechanism on trailer, data transmission is carried out between main vehicle controller and trailer controller. Main vehicle controller controls main vehicle brake according to pedal signal and main vehicle tire parameter, and sends brake command or information to trailer controller, and trailer controller combines received command or information and trailer tire parameter control trailer collaborative brake. The utility model realizes main trailer collaborative brake and tire state real -time monitoring, improves brake response speed and effect, shortens brake distance, enhances vehicle controllability and safety, and is applicable to sightseeing car etc.

This utility model relates to the field of automotive brake technology and discloses a composite heat dissipation brake assembly, including a brake disc with multiple heat dissipation holes on its surface and ventilation ribs inside. A bracket is located on one side of the brake disc, and a top cover is located at the upper end of the bracket. Friction pads are located on the lower side of the top cover and inside the bracket, and the friction pads are disposed on the upper and lower sides of the brake disc. A caliper body is located on the upper side of the top cover and is connected to the friction pads. A cooling mechanism is located inside the bracket and communicates with the interior of the friction pads. This design has the advantages of reducing the maximum temperature of the brake caliper during operation, increasing braking force during prolonged braking, and reducing braking distance. It solves the problem that if heat cannot be effectively dissipated, it will lead to a decrease in braking performance, thus affecting driving safety.

The application discloses a multi-stage brake system and a locomotive vehicle system with the same. The multi-stage brake system comprises: an air cylinder for outputting air pressure; a pressure adjusting device comprising a first adjusting valve body and a second adjusting valve body connected to the air cylinder respectively and in parallel with each other, and a first electromagnetic valve connected to the first adjusting valve body and the second adjusting valve body simultaneously; and a relay valve comprising a first input end connected to an output end of the pressure adjusting device, a second input end connected to the air cylinder through a second electromagnetic valve, and a brake output end for outputting brake pressure. The multi-stage brake system can output at least four stages of brake force, effectively improve the average deceleration and shorten the brake distance.

The present application relates to the technical field of Internet of Things, in particular to a kind of intelligent safety helmet based on Internet of Things and its positioning method, comprising the following steps: fusion air pressure and acceleration identification vertical carrying state, calibrate sensor zero offset, decoupling corrected acceleration component, identify travel and wake up positioning, calculate theoretical stop displacement, compare electronic fence output early warning information, in the present application, collect air pressure and acceleration utilize vertical carrying scene feature extraction zero offset parameter to carry out sensor self-calibration, eliminate the influence of cumulative error on motion attitude solution, accurately distinguish travel and in-place work state by calculating the dispersion degree of orthogonal axial component and active difference, realize positioning function on-demand wake-up, combine instantaneous ground speed and biological response mechanism to construct kinematic model, calculate braking distance and generate virtual vector end point, judge the risk of crossing the border in advance before touching the electronic fence, ensure that the work personnel have sufficient safety braking margin.

The application relates to a high-altitude operation basket safety lock safety test device, belonging to the technical field of safety anti-falling, which comprises a basket device, an angle detection unit arranged at the bottom of the basket device and distance sensors arranged at the two sides of the basket device respectively; an extension unit is arranged below the basket device; the extension unit has an extension part which can stretch vertically; the extension part is rotationally connected with a deflection unit, the bottom of the extension unit is fixed on the ground; a deflection piece is fixed on the extension part; wherein the distance sensor is used for detecting the braking distance of the basket device; the angle detection unit is used for detecting the deflection angle of the deflection piece; the application has the technical effect that the safety lock can be tested according to the actual falling condition of the basket, so that the safety lock can be safely used.

To provide a simulation system that can reproduce vehicle deceleration more realistically. [Solution] This simulation system comprises a reaction time processing unit that calculates the reaction distance based on the reaction time of a human or machine, including the time it takes to perceive and recognize the occurrence of a dangerous event and the time from that recognition to the start of emergency braking of the vehicle, and the speed immediately before the start of emergency braking; and a braking processing unit that calculates the braking distance from the start of emergency braking to the stopping of the vehicle. The stopping distance until the moving vehicle comes to a stop due to emergency braking is determined by adding the reaction distance calculated by the reaction time processing unit and the braking distance calculated by the braking processing unit.