113 results about "Speed bump" patented technology

The invention relates to the technical field of road safety facilities, in particular to a gradient effect concave deceleration strip visual grading mark design method which comprises the steps that S1, basic design data of a target road scene are obtained, and the basic design data comprise a target limited vehicle speed numerical value and a total length numerical value of a deceleration area; s2, according to the basic design data, geometric configuration parameters of a plurality of concave speed reduction units sequentially arranged in the vehicle advancing direction are calculated, and the geometric configuration parameters comprise the concave depth numerical value of each concave speed reduction unit and the distance numerical value between every two adjacent concave speed reduction units; the concave depth value obtained through calculation presents a gradually increasing trend in the vehicle advancing direction. According to the method, the concave speed reduction units with the gradually-increased depth and the gradually-decreased interval are configured through an algorithm, the overspeed vehicle is forced to decelerate through non-linear amplified composite vibration, and the control efficiency of road section speed limiting is improved.

The application provides a speed bump energy absorption working condition recognition method and system, and relates to the technical field of intelligent transportation systems.The method collects vehicle weight, speed and vertical acceleration data in real time through a laser radar and a load cell, constructs a full-quantity feature data set, first calculates kinetic energy change and vertical impact energy, and after the cumulative energy reaches a threshold, stores the speed and acceleration data before and after the speed bump according to vehicle weight, performs Fourier transform on the acceleration data, extracts the low-frequency energy proportion, and constructs a quadratic regression model combined with the speed before and after the speed bump to predict the speed after passing through.The energy proportion abnormal threshold is set by statistical stratification of the mean and standard deviation of the energy proportion database, and when the low-frequency energy proportion of a new vehicle is lower than the energy proportion abnormal threshold and the speed prediction error is greater than or equal to 15%, it is determined that the energy absorption structure fails, and the dynamic monitoring and accurate diagnosis of the health state of the speed bump are realized.

A control system for controlling vehicle speed to navigate a speed bump comprises controllers configured to receive speed bump information from a geographic information system indicative of a position

The invention relates to the technical field of deceleration hillocks, and discloses a stable deceleration hillock and a pavement process of the deceleration hillock, the stable deceleration hillock comprises a plurality of frameworks, asphalt layers are arranged outside the frameworks, and the plurality of frameworks and the asphalt layers outside the frameworks can be spliced to form the deceleration hillock; the framework is hollow, a separation assembly is arranged in the framework, the separation assembly comprises two separation rods, and the two separation rods are used for separating the joint of an asphalt layer and a road surface; the separation assembly comprises a jacking mechanism; butt joint mechanisms are arranged at the two ends of the framework. The deceleration hill can be formed by splicing the multiple frameworks and the asphalt layers outside the frameworks, the whole asphalt layers are firmly bonded to the road surface through the bonding materials in the four square grooves in the bottoms of the asphalt layers, stable installation of the asphalt layers is achieved, and compared with a conventional mode that fasteners are knocked into the road surface for installation, damage to the road surface is effectively avoided.

The application discloses a speed bump recognition method and system, real-time vehicle information is acquired, the vehicle information at least includes the vertical acceleration signal of the vehicle body, the vertical acceleration signal of the vehicle body is filtered through a pre-designed filter set, the filtering result of the effective speed bump candidate identification is obtained, if the filtering result of the effective speed bump candidate identification meets the speed bump recognition condition, the target speed bump identification is obtained from the filtering result of the effective speed bump candidate identification, and the target speed bump identification is determined as the speed bump area, so as to ensure the accuracy of the acquired speed bump area, improve the vehicle auxiliary control, and the speed bump recognition mechanism is used for preventing the same speed bump from being repeatedly identified when the left and right wheels of the vehicle do not cross the speed bump at the same time.

Vehicle display device (10) which displays a predetermined image in a display area (24, 25, 26) indicating a forward view of a vehicle (12), comprising: a memory (34); and a processor (30) connected to the memory (34), wherein the processor (30) is configured to: to identify a lane (70) on which the vehicle (12) is traveling; detect a position (O) of the vehicle (12) relative to the lane (70); based on the lane (70) and the position (O) of the vehicle (12) detected by the processor (30), determine whether there is a possibility that the vehicle (12) is deviating from the lane (70); and In a case where it has been determined that there is a possibility that the vehicle (12) may deviate from the lane (70), an image of a stereoscopic object (B) arranged along the lane (70) is to be displayed in the display area (24, 25, 26). characterized by the fact that the processor (30) is further configured to display the image of the stereoscopic object (B) in the display area (24, 25, 26) such that: the stereoscopic object (B) appears to move along the track (70) from a background side to a foreground side of the display area (24, 25, 26); and the stereoscopic object (B), whose movement has stopped at the foreground of the display area (24, 25, 26), appears to vibrate to simulate the movement of the vehicle (12) over a three-dimensional object such as a rumble strip, the image of the stereoscopic object (B) is caused to oscillate in a vertical, lateral or oblique direction, enabling the occupant to experience a realistic sensation as if the vehicle were vibrating as a result of driving over a rumble strip.

The utility model discloses a folding speed brake, which relates to the technical field of speed brakes and comprises a speed brake main body, one end of the speed brake main body is connected with a connecting mechanism, one end of the connecting mechanism is connected with an auxiliary plate, and the speed brake main body comprises a movable plate. Through the cooperation of the speed brake main body, the open groove, the reflector, the movable plate, the reflective coating, the connecting column, the spring, the limiting sleeve, the movable groove and the first non-slip mat, the light of an automobile can be reflected through the arrangement of the reflector and the reflective coating, a driver is reminded that a speed bump exists on the road surface, the movable plate is jacked up through the spring, and the speed bump is prevented from falling off. When an automobile passes through the surface of the movable plate, the movable plate has a certain sinking space due to the elastic force of the spring, so that the passing automobile cannot be too bumpy, and the purpose of enabling the driver to pass through in a decelerating mode is effectively achieved.

The application discloses a road damage detection method and device based on crack morphology, equipment and a storage medium, and relates to the technical field of intelligent transportation. The method comprises the following steps: acquiring a visible light image, a polarized light image, three-dimensional terrain data and material reflectivity data of a target road surface to obtain a multi-source multi-modal data set; performing interference separation on the multi-source multi-modal data set to obtain a crack candidate data set; performing multi-dimensional constraint screening and region elimination on the crack candidate data set to obtain a target crack region; performing space-time correlation morphology tracking on the target crack region to extract three-dimensional morphology parameters and continuity indexes of the target crack; inputting the three-dimensional morphology parameters and the continuity indexes into a road condition-damage correlation model to obtain road damage grade and crack development trend evaluation results, and completing road damage detection. The application can accurately detect road damage of crack morphology in complex road conditions with interference objects such as repair marks, manhole covers, speed reduction belts and road markings.

The application provides a road surface state recognition method and device, and solves the problems of single road surface state recognition category, coarse result granularity and inability to distinguish specific road surface abnormal types caused by dependence on simple threshold judgment and shallow features in the prior art. The method comprises the following steps: acquiring a vertical vibration acceleration data segment of a vehicle in operation; extracting a characteristic value according to a preset optimal feature subset, wherein the subset comprises a frequency domain peak value and a spectrum energy; inputting the characteristic value into a classification model to obtain a recognition result, wherein the model is obtained by training based on data comprising at least three road surface state labels. Through fixed feature optimization, the application realizes fine recognition of multiple states such as well frame difference, expansion joint and deceleration strip, and significantly improves the calculation efficiency while ensuring the accuracy.

The invention relates to an impact load-oriented electro-hydraulic servo active suspension feedback linearization sliding mode robust control method, which belongs to the technical field of vehicle active suspension and electro-hydraulic servo control, and comprises the following steps of: firstly, establishing a quarter vehicle two-degree-of-freedom active suspension model; the method comprises the following steps: step 2, constructing a nonlinear dynamic model of the electro-hydraulic servo actuator of the valve-controlled cylinder; step 3, designing a feedback linearization sliding mode composite controller and giving a stability proof; and step 4, carrying out controller parameter setting and simulation comparison. According to the feedback linearization sliding mode robust control method provided by the invention, the nonlinearity and parameter uncertainty of the actuator can be effectively compensated under the impact working conditions of a deceleration strip and the like, the piston displacement tracking error and sliding mode buffeting are remarkably reduced, sprung mass vibration is reduced, the vehicle driving smoothness and attitude stability are improved, and the method is suitable for large-scale popularization and application. The method is suitable for the field of vehicle hydraulic active suspension control.

The invention relates to the technical field of automobile control, in particular to an automobile electric drive abnormal sound control method, device and equipment and a storage medium. The method comprises the following steps: monitoring a wheel speed change parameter of a wheel, and calculating a wheel speed fluctuation parameter of the wheel according to the wheel speed change parameter; the abnormal sound condition of electric drive is judged according to the wheel speed fluctuation parameters; and the torque distribution strategy of the motor drive assembly is adjusted according to the abnormal sound condition of the electric drive. According to the method, the electric drive torque output before the dynamic decision of the wheel speed fluctuation parameter is quantified in real time, the low-amplitude impact working condition (such as passing of a daily deceleration strip) is accurately covered, the small torque is instantly output to suppress gear knocking when the wheel speed fluctuation reaches the abnormal sound threshold value, and the defect that low-amplitude impact cannot be processed due to energy consumption constraint in a traditional scheme is overcome; and meanwhile, torque output is prohibited when fluctuation is not larger than a threshold value, energy consumption economy is effectively maintained, and abnormal sound radical treatment and optimal energy consumption balance under all working conditions are achieved.

The utility model relates to the technical field of deceleration strips, and discloses a parking lot deceleration strip device which comprises a metal deceleration strip bottom shell, a longitudinal supporting frame is fixedly installed in the metal deceleration strip bottom shell, and a module assembling mechanism and a corner limiting mechanism are arranged on the top of the metal deceleration strip bottom shell. According to the deceleration strip device for the parking lot, through the damping buffer layer arranged at the top of the metal deceleration strip bottom shell, impact force and noise can be reduced through the damping buffer layer, noise generated when a vehicle rolls is reduced, the environment is prevented from being affected, meanwhile, independent replacement can be achieved when local damage occurs through a modular installation mode, and the maintenance cost is reduced; the installation mode that the deceleration strip is embedded into the external positioning frame can guarantee that the deceleration strip is flush, meanwhile, the combination mode of the metal deceleration strip bottom shell and the damping buffer layer improves durability, the impact resistance effect is improved, protrusions can be formed on the top of the damping buffer layer through the formed concave stripes, the road holding force of wheels is increased, and slipping is avoided.

The invention discloses a vehicle driving control method and system, automatic driving equipment and a readable storage medium, and belongs to the technical field of vehicle control, and the method comprises the steps: planning a driving path based on the current position of a vehicle; marking a convex part on the road surface based on the driving path; obtaining a static distance based on the current position of the vehicle and the convex part; obtaining a dynamic distance based on the movement parameters of the vehicle and the static distance; in response to the dynamic distance being less than the distance threshold, a moving speed of the vehicle is adjusted. According to the vehicle running control method, the moving speed of the vehicle is adjusted based on the moving parameters of the vehicle by calculating the static distance and the dynamic distance between the vehicle and the protruding part, so that the vehicle can pass through the speed bump at the appropriate speed, the shaking amplitude of the vehicle body is reduced, and noise generated when the vehicle passes through the speed bump is reduced.

This invention relates to an automatic detection method, system, electronic device, and medium for road potholes and speed bumps, belonging to the fields of intelligent transportation, vehicle safety, and autonomous driving technology. The method includes: receiving data packets sent by a vehicle; identifying target objects in the data packets using a target detection model and calculating the geographic coordinates of the target objects based on their three-dimensional coordinates; performing spatial clustering and voting-based data fusion on the geographic coordinates of target objects uploaded from different vehicle terminals to determine the location of the target objects; updating a digital map containing the target objects based on their location; and sending the digital map to the vehicle via OTA (Over-The-Air). The automatic detection method for road potholes and speed bumps provided by this invention utilizes the powerful computing capabilities of the cloud to generate a high-precision global map of road potholes and speed bump distribution. This map is then distributed to vehicles via OTA, enabling vehicles to plan ahead and achieve autonomous and smooth deceleration or avoidance, thus improving safety and comfort.

The embodiment of the application provides an automatic parking method, device and electronic equipment, the method comprises the following steps: determining the relative position between the driving shaft of a target vehicle and a target deceleration strip when the target vehicle is located at a first starting position; if the relative position does not satisfy a preset passing condition, controlling the target vehicle to drive to a second starting position from the first starting position in a far direction, wherein the far direction is the direction of the driving shaft relative to the target deceleration strip; and controlling the target vehicle to drive to a target parking space from the second starting position via the target deceleration strip. Thus, the target vehicle successfully crosses the deceleration strip and parks in the target parking space, and the safety of the target vehicle parking is improved.

The invention relates to the technical field of bridge detection, and discloses a bridge crack laser detection device and a detection method.The bridge crack laser detection device comprises a device plate, a console is arranged at the top of the device plate, a push handle is arranged at the top of the device plate, a detection mechanism is arranged at the top of the device plate, and a pretreatment mechanism is arranged at the bottom of the device plate; a marking device is arranged at the top of the device plate, the detection mechanism comprises a fixed plate sheet, a limiting rotating sheet, a connecting roller, a reciprocating screw rod, a detection moving block and a limiting moving groove, the fixed plate sheet is fixedly connected to the top of the device plate, and the limiting rotating sheet is fixedly connected to the top of the device plate; the gravity center of the laser detection head at the bottom of the rotating bead always faces downwards, so that the detection precision of the device is improved, and when the device passes through a deceleration strip on a road surface, tremor generated by the ground touching wheel can be buffered by the spring between the device plate and the fixed rotating block, so that the detection stability of the device is improved.

This invention relates to the field of road speed bump technology, and more particularly to a retractable speed bump suitable for urban roads. It includes a triggering device, a force transmission device, a feedback device, and a recovery device pre-embedded in the road surface. The triggering device and the feedback device are spaced apart, with the force transmission device and the recovery device respectively located between them, and the recovery device positioned above the force transmission device. The triggering device includes a trigger block, trigger rods at both ends of the trigger block, and a compression spring damper located below the trigger block. The feedback device includes a retractable speed bump and fixed speed bumps on both sides of the retractable speed bump. The fixed speed bumps are fixedly connected to the asphalt surface layer by fixing pins. A tension spring damper is located below the retractable speed bump. This invention utilizes the lever principle and the cooperation of gears and rotating rods to achieve different driving experiences through speed control, reducing vehicle wear and increasing the driver's awareness of slowing down.

The application discloses a kind of highway maintenance safety early warning system and method.The system includes: portable induction deceleration strip and OBU construction vehicle;Portable induction deceleration strip is deployed in the edge of construction warning area associated with OBU construction vehicle, for sending alarm signal to OBU construction vehicle when detecting that high-speed passing vehicle enters construction warning area;OBU construction vehicle is used for alarm prompt when receiving the alarm signal sent by portable induction deceleration strip, to guide construction personnel evacuation.The application can actively send the alarm prompt of passing vehicle breaking into construction area to construction personnel by constructing highway maintenance safety early warning system, guide construction personnel to evacuate quickly, reduce the probability of accident.

The application relates to a perception type intelligent street lamp, which comprises a lighting mechanism, a sensing mechanism and an auxiliary mechanism, the lighting mechanism comprises a light source, a power supply mechanism is electrically connected with a power input end of the light source, the sensing mechanism comprises a rubber base, the upper end of the rubber base is fixedly connected with a rubber vault, and the inner cavities of the rubber base are uniformly distributed with a plurality of elastic supporting plates, the upper end of each elastic supporting plate is fixedly connected with the inner side of the rubber vault, compared with the prior art, the sensing range of a far-infrared proximity sensor is limited, when a vehicle passes, the LED lamp cannot provide lighting effect in time, and the laying cost and failure rate of the far-infrared proximity sensor are high, the device uses a mechanical structure to sense vehicle driving, is simple and reliable, has low failure rate, can also function as a deceleration zone, is more functional, does not need to keep the sensing sensor working at all times, and is more energy-saving and environment-friendly.

The invention discloses an automobile hydraulic valve core flow testing device which comprises a workbench, the top of the workbench is sequentially provided with an oil tank and a hydraulic pump, the oil inlet end of the hydraulic pump is communicated with the oil tank through a pipeline, and the oil outlet end of the hydraulic pump is provided with a flow guide pipeline; the invention relates to the technical field of valve core flow testing, and the automobile hydraulic valve core flow testing device can dynamically simulate the vibration and deceleration strip passing impact working conditions in the automobile driving process through the collaborative design of a vibration mechanism and an impact mechanism, and the vibration mechanism drives a cam to rotate by means of a first motor. The impact mechanism drives double turntables to rotate through transmission of a second motor, a connecting shaft and a synchronous belt, a lifting frame and an impact block are driven by a connecting rod to complete the impact action, the lifting frame and the impact block can operate independently or in a stacked mode, and the problem that the actual working state of a valve element cannot be reflected through static testing is solved. And the test result has higher reference value.

The embodiment of the invention relates to a vehicle torque control method and device, a vehicle and a storage medium, and the method comprises the steps: obtaining a vehicle speed signal and a gear signal of the vehicle in the vehicle driving process; acquiring video information of a target area around the vehicle according to the gear signal; identifying whether a bumpy road condition exists in the video image according to the video information; and under the conditions that the bumpy road condition exists in the video picture, the bumpy road condition meets the preset position condition, and the vehicle speed signal meets the preset vehicle speed condition, tooth leaning torque is applied to a motor of the vehicle. Therefore, the tooth leaning torque can be applied when the vehicle approaches the deceleration strip or the bumpy road surface, continuous torque application is avoided, the vehicle endurance is improved, meanwhile, the road condition and the vehicle state are recognized, the torque is dynamically adjusted, and the control precision and comfort are improved.

The invention belongs to the technical field of vehicle parking auxiliary facilities in the field of traffic transportation, and discloses a staggered type electric vehicle parking frame and a using method thereof.The staggered type electric vehicle parking frame comprises a parking frame body, a blocking beam and a deceleration strip and comprises the following steps that S1, an electric vehicle is pushed towards the parking frame body along an inlet of a parking position; the electric vehicle is parked to a preset position through the limiting effect of the deceleration strip; s2, enabling the head of the electric vehicle to be located at a horizontal line position different from that of an adjacent parked electric vehicle, and completing parking; and S3, when the electric vehicle is taken, the electric vehicle located in the upper area is moved out of an outlet reserved in the parking frame, and the electric vehicle located in the lower area is moved out of the area below the parking position. According to the invention, the trouble of'handlebar fight 'is solved, the staggered design enables adjacent headstocks not to be in the same line, the handlebars are completely not in contact, 'dodging' is not needed during parking and taking, and the bicycle is very worry-saving; in an area with the same size, a traditional parking frame needs to leave an avoiding gap for a handlebar, the dislocation frame does not need to leave extra space, more cars can be parked in places such as downstairs of a community and doorways of a business district compared with the traditional frame, the problem that no place is available for parking can be obviously solved, and actual application and operation are facilitated.

This invention provides a method, apparatus, device, and storage medium for identifying speed bumps. It utilizes a preset edge detection algorithm to perform edge detection on an original image to obtain a first image, wherein the original image includes information about the road ahead of the vehicle. It then performs color recognition on the original image based on a preset color, obtaining a second image, wherein the preset color is associated with the color of the speed bump. Based on the first and second images, it determines the speed bump identification result corresponding to the original image. By adopting the above technical solution, it achieves the beneficial effects of effectively improving the speed bump identification efficiency and reducing the probability of missed and false detections and the difficulty of application, while balancing time and economic costs.

An electronic parking brake system that generates a clamping force required for parking of trailer-mounted towing vehicles includes an electronic parking brake provided on at least one of front and rear wheels of the towing vehicle; and a controller configured to receive a front wheel speed, a rear wheel speed, and a longitudinal acceleration of the towing vehicle, determine whether or not the trailer is mounted based on changes in the received front wheel speed, rear wheel speed, and longitudinal acceleration when the towing vehicle passes a speed bump, and determine the clamping force required for parking according to whether or not the trailer is mounted when parking is operated, and control the electronic parking brake to generate the determined clamping force.

The invention discloses a control method and device of an electric vehicle, the electric vehicle, a computer readable storage medium and a processor. The method comprises the steps that the current motor rotating speed and the brake pedal opening degree of a target vehicle are obtained; calculating a rotating speed change rate based on the current motor rotating speed; the current braking intention type of the target vehicle is judged according to the brake pedal opening degree; when the absolute value of the rotating speed change rate is larger than a preset threshold value and the braking intention type is a low braking intention or a medium braking intention, a deceleration strip flag bit is activated and used for indicating that the road on which the target vehicle runs is a deceleration strip or an abnormal road section; the control system dynamically adjusts the braking torque of the target vehicle during the deceleration strip flag is in the active state, thereby reducing the coasting feedback force. According to the method and the device, the technical problem that the energy recovery efficiency is influenced due to high misjudgment rate caused by single threshold judgment of the wheel speed fluctuation quantity under the working condition of the deceleration strip in the related technology is solved.

The application discloses a passenger car towing device performance evaluation method, and belongs to the technical field of trailer testing, which comprises test site, climate condition, method load and other aspects of requirements. According to the method, the test can expose the problems of deformation or even damage of the towing device of a certain vehicle model under special working conditions and secondary damage to other parts of the vehicle, so as to avoid the problems flowing into the market. Through the collection of user market complaint cases, simulation of accident vehicle towing site, multi-vehicle model benchmarking verification, a relatively comprehensive verification test working condition is formulated, including towing start impact test, deceleration belt towing test, fixed circle towing test, slope towing test, curbstone escape test and roadbed slope escape test. Through the method, the towing device of a newly launched vehicle model can be comprehensively examined, and the safety performance of the product is improved.

The application discloses a torque control method, which can be executed by a motor controller in one example. The motor controller can determine the demand of increasing torque, specifically, the motor controller can acquire the lower limit of the rotating speed of the motor and the actual rotating speed of the motor, and determine the demand of increasing torque when the actual rotating speed is lower than the lower limit of the rotating speed. Further, the motor controller can determine the target torque for increasing the rotating speed of the motor based on the lower limit of the rotating speed of the motor and the actual rotating speed of the motor. Further, the motor controller can control the motor to increase the torque to the target torque. By using the scheme, the motor controller can automatically control the torque increase, and accordingly, when the vehicle brakes through the deceleration zone, the rapid reduction of the front wheel speed can be avoided to cause a larger impact noise, and further, the driving experience of the user is improved.

The utility model relates to the technical field of road equipment, and particularly discloses a combined type road deceleration strip which comprises a bottom plate, a plurality of sets of bolts are arranged in the bottom plate, a plurality of sets of first notches and positioning grooves are formed in the top of the bottom plate, a deceleration strip body is connected to the top of the bottom plate, and a plurality of sets of connecting rods are connected to the interior of the deceleration strip body. A circular plate is mounted at the top of each connecting rod, a positioning plate is mounted at the bottom end of each connecting rod, a plurality of groups of second notches corresponding to the first notches are formed in the deceleration strip body, and a rotating plate is mounted at the top of each circular plate; the deceleration strip can be firmly fixed on the ground through a bolt structure in the bottom plate, the deceleration strip body and the bottom plate are connected in a combination mode of the positioning plate and the notch and in threaded connection, the stability of connection is ensured, meanwhile, the disassembly and assembly process is simpler and more convenient, the maintenance process is greatly simplified, the maintenance cost is reduced through the design, and the maintenance efficiency is improved. And the working efficiency of road safety facilities is improved.

The utility model discloses a heavy equipment auxiliary lifting trailer belongs to highway breakdown equipment field, including frame mechanism, the upper end of frame mechanism is installed with movable frame mechanism, the lower extreme of frame mechanism is installed with wheel group mechanism, frame mechanism includes frame welding spare, its technical scheme main point is, through the setting of heavy roller group makes the device in the tire repair, can cooperate with the breakdown truck directly and drag the fault vehicle away from the scene, effectively avoid the fault vehicle due to dispatch vehicle and the time -consuming of purchasing accessories, make the truck tire damage on the highway after the repair fast and convenient, reduce the repair physical strength, and avoid relying on many people's operation, especially in the tunnel special highway section, can guarantee the road unobstructed within the golden twenty minutes, and the heavy pulley group bearing capacity is high, and effective bearing can reach thirty tons, can also support extreme weather, ice and snow, pavement expansion joint, toll station deceleration zone, rugged road section etc.