101 results about "Road roughness" patented technology

Arrangement and method for determining weight of an occupying item in a seat including one or more weight sensors arranged to obtain a measurement of the force applied to the seat, a forcing function determination arrangement for measuring a forcing function of the seat and a processor coupled to the weight sensor(s) and forcing function determination arrangement for receiving the measurement of the force applied to the weight sensor(s) and the measurement of the forcing function from the forcing function measurement system and determining the weight of the occupying item based thereon. The forcing function determination arrangement may include an accelerometer and measures effects on the seat caused by load of a seatbelt associated with the seat and / or effects on the seat of road roughness, steering maneuvers, and a vehicle suspension system.

A text-to-speech (TTS) system implemented in an automotive vehicle is dynamically tuned to improve intelligibility over a wide variety of vehicle operating states and environmental conditions. In one embodiment of the present invention, a TTS system is interfaced to one or more vehicle sensors to measure parameters including vehicle speed, interior noise, visibility conditions, and road roughness, among others. In response to measurements of these operating parameters, TTS voice volume, pitch, and speed, among other parameters, may be tuned in order to improve intelligibility of the TTS voice system and increase its effectiveness for the operator of the vehicle.

The invention relates to an asphalt pavement flatness detection device. The problems that an existing pavement flatness detection device is tedious in measurement and large in workload of detection personnel are effectively solved. According to the technical scheme, the detected pavement flatness information condition can be amplified in a corresponding proportion by the device so that measurementpersonnel can clearly and visually see the flatness information of the pavement; and through cooperation of an intermittent transmission mechanism arranged on a trolley and a second transmission device, the detection device completes spot check and detection of the pavement surface flatness at specific intervals, namely, automatic detection of pavement flatness information is achieved, the workload of detection personnel is greatly reduced, and the device is convenient to use and can be widely applied and popularized.

The invention relates to a road evenness detection method and a road evenness detection system. The road evenness detection method, which enables a test vehicle to run on a road to be detected to acquire the evenness of the road to be detected, includes the following steps: the triaxial acceleration signal, direction signal and position and speed signals of the tested vehicle are acquired; trained classifiers are adopted to filter pavement events corresponding to the acceleration signal, the direction signal and the position and speed signals within the same period of time in order to acquire road evenness information; the classifiers comprise a first classifier, a second classifier, a third classifier, a fourth classifier and a fifth classifier, the first classifier is used for filtering the manhole cover and pavement speed-reducing device events according to the direction signal, the other interference events are filtered by the second classifier, the third classifier, the fourth classifier and the fifth classifier, consequently, the interference events in road detection are filtered, and finally, an accurately detected road pit condition is obtained.

An intelligent system and method detects and informs operators of unstable vehicle conditions. An accelerometer and gyro based micro-controller system dynamically computing the center of mass, speeds, positions, angles, stability factors, Velocity-Road Roughness Index, Dynamic Stability Function, and other parameters critical in determining the dynamics of vehicle motion. The apparatus may be integrated into an overall vehicle network and may incorporate a method for detecting and warning vehicle operators of unstable driving conditions which may include rollover, high velocity turns, sideslope conditions, rough roads, slip, and other dynamic events.

The invention discloses a road roughness index acquisition and sharing method and system. The method comprises the following steps: obtaining vehicle driving road surface vibration information and obtaining vehicle geographical position information and driving speed; generating a road condition vibration index according to the road surface vibration information and the geographical position information; and generating a road roughness index according to the road condition vibration index and the driving speed, and uploading the road roughness index to a server. According to the road roughness index acquisition and sharing method and system, the road condition is analyzed in the driving process, and thus the roughness index of the road section is obtained; a driver can decide whether to drive on the road according to the roughness index thereof, so that the problems of waste of time and even that the road is impassable due to extremely bad road condition can be prevented; and meanwhile, the information is uploaded to the server or sent to other users, so that the case that other users drive on the road section can be prevented.

The invention discloses a road smoothness detection system based on intelligent mobile phone crowdsourcing collection, comprises a data acquisition module arranged in a smart phone, A data sending module and a cloud management center, The data acquisition module establishes a crowdsourcing task when the user opens the electronic map navigation software. The crowdsourcing task comprises acquiring the current longitudinal acceleration value and the road inclination angle through the built-in sensor of the mobile phone, and acquiring the position, the heading, the time and the moving speed of theroad segment where the user is currently located. The data sending module sends the crowd-sourcing task to the cloud management center through the network. The cloud management center receives crowdsourcing tasks from different users, classifies and integrates all kinds of data in the crowdsourcing tasks, and then analyzes and integrates the data through a road smoothness detection algorithm to evaluate the road quality. The invention improves the detection efficiency of the road smoothness and the reliability of the detection data, and meets the requirements of the highway side operation andthe side detection.

The invention discloses a field estimation method and a simulation estimation method for flatness and comfort of a bituminous pavement. Various data information, such as time, experimental vehicle speed, the acceleration speed data of each test point, longitude and latitude of each test road section, and image data of a test lane, in a test process can be collected in real time by a data collecting instrument adopted by the field estimation method; relatively complete data information facilitates data selection and provides theoretic data basis for subsequent performance change of road. According to the simulation estimation method, a built finished vehicle model is very close to the movement rule of a practical vehicle, so that the movement character under motivation of road roughness can be better simulated; the operation speed of a software model on a computer is 4 to 6 times faster than the actual speed, the roughness of a tested road can be quickly estimated, the estimation method is relatively few in outdoor operation and relatively low in external influence, human and material resources can be effectively saved, the mounting process of a testing apparatus is avoided, and the estimation method is more simple and convenient and shorter in required time.

An on-board diagnostic system of a vehicle comprises disabling diagnostic operation, such as a misfire monitor, based on road roughness. In one example, the disabling of the diagnostic operation is based on brake actuation and degradation of an anti-lock braking system.

The invention discloses a road condition simulation loading test device and a test method for a driving motor of an electric vehicle. The test device is composed of a strain torque speed sensor, a speed reducer, a transmission device, tires, a power motor, a lifting device and a detection control cabinet. The transmission device, the tires and the power motor constitute a loading platform to simulate various road conditions; a motor lifting platform adjusts the height of the motor; and a computer adjusts the road conditions simulation loading platform to realize realistic road surface simulation on the motor to be tested under different weather, different roughness and different driving modes. By simulating a road with conveyor belts, simulating road roughness with change of the conveyor belts, simulating road slope with lifting adjustment of contact angle between the tires and the conveyor belts through a lifting transmission device and simulating different weather conditions with change of force applied by the power motor, a user inputs road conditions, collects motor power and speed data, processes the data and forms a graphical report to intuitively reflects the performance parameters of the motor and simulated loading effects under different road conditions.

The invention relates to a method and a device for controlling the vibration in an automobile hierarchical modeling manner. The method comprises the following steps: sending the data of eight vertical and lateral road roughness sensors to a CPU processor, integrating the hierarchical modeling algorithm and obtaining the motion state of the centroid of suspended mass, the constrained force of suspended mass, and acceleration predictive values obtained by predicting and decoupling the vertical and lateral acceleration variable quantities of No.1 to No.4 suspension brackets, through the operation; respectively transmitting to eight vertical and lateral matrix control quantity operation module of No.1 to No.4 units; obtaining theoretical quantity of controllable actuators of No.1 to No.4 units after the synthesis is conducted; conducting the conversion operation of actuating quantity because the data received by each actuator generates the corresponding action. The invention has the advantages that the hierarchical control architecture built on the basis of considering the common influence of the vertical excitation and the lateral excitation of the road is converted into eight four-multiplied-four matrix, so as to simultaneously conduct the control quantity operation of four controllable actuators and the vibration control, thereby reducing online operation time and reaching the optimum vibration control effect of the whole automobile.

A method for optimizing parameter match between a suspension system and a damping element of hub-driven electric vehicle includes such steps as establishing vehicle dynamic analysis model accord to specific structure of hub-driven electric vehicle, optimizing parameters matching between suspension system and damping element of hub-driven electric vehicle, optimizing parameters matching between suspension system and damping element of hub-driven electric vehicle. The mathematical model of road roughness and electromagnetic force of hub motor is established. Considering the different road conditions of vehicles, At vehicle speed and load condition, the minimum relative displacement of stator and rotor, pitch angle acceleration of vehicle body and vertical vibration acceleration are taken asthe optimization objective, and the suspension dynamic deflection, tire dynamic load, suspension damping parameter, performance parameter of damping element and deformation of damping element are taken as the constraint conditions, and the parameters of suspension system and damping element are optimally matched; Verify the effectiveness of the optimization results, if not met, then re-match, if meet the requirements, then obtain the final design. The proposed optimization design method is used to optimize the parameters of suspension system and damping elements, which can effectively improvethe multi-objective performance of the vehicle under various operating conditions.

The invention discloses a process for lifting an asphalt pavement inspection well and a lifting structure. According to the process, cast-in-situ hard high-strength concrete with fine stones is adopted between the upper part of a lower structure layer of a to-be-lifted inspection well and an asphalt concrete surface layer to increase the height of the inspection well; steel keel, a cushion block and the like are arranged in front of the cast-in-situ hard high-strength concrete with fine stones to further ensure the height of a well base, so that the elevation of the constructed and molded inspection well lid is consistent with that of a surrounding asphalt concrete pavement; and the flatness is controlled within 5mm. According to the process, the upper load is supported by strength of solidified reinforced concrete, and the mass defect of well base sinking is thoroughly improved; when the well base is cushioned by the cast-in-situ hard high-strength concrete with fine stones, the elevation is adjusted by the fluidity, so that improvement of the road flatness is facilitated; and the driving comfort is met.

The invention provides a method and system for collecting road flatness, an evaluation system, a medium and a server. The method comprises: receiving acceleration information in three dimension directions, vehicle driving speed information, a vehicle real-time coordinate position, and a vehicle sprung parameter of a vehicle driving on a road; according to the acceleration information, the vehicledriving speed information, and the vehicle sprung parameter, calculating a flatness index of the road; and matching the road flatness index with the vehicle real-time coordinate position according toa time sequence. According to the invention, the road management department can obtain the flatness condition of the road network comprehensively in real time; for the same road section, the detectionaccuracy and reliability can be improved continuously with increasing of the detection number of times; the road surface flatness detection cost can be lowered to the greatest extent; and the flatness detection cycle can be reduced.

The invention discloses a method for extracting road surface spectrum parameters, comprising the following steps: steps 1, establishing a 1 / 4 vehicle model, and establishing a calculation model of a generalized international flatness index IRIE at an arbitrary uniform vehicle speed u based on a calculation model of an international flatness index IRI; step 2, obtaining a relationship between the generalized international flatness index IRIE and the road surface spectrum based on the random vibration theory; and step 3, extracting the frequency index W and the road roughness coefficient Gq(n0)as road surface spectrum parameters based on the relationship between the generalized international flatness index IRIE and the road surface spectrum. The method for extracting road surface spectrum parameters provided by the invention is capable of realizing the establishment of a large number of measured road surface spectrum databases, and extracting the road surface spectrum with high efficiency and low cost.

The invention discloses a device for detecting road flatness. The device comprises a distance measurement module, a height measurement module, and a detection module, wherein the distance measurementmodule is arranged at a concentric position of a wheel axle of a left wheel and / or a right wheel on the rear side of a vehicle and is used for detecting a current driving distance of the vehicle; theheight measurement module is arranged on a wheel track tape position of the left wheel and / or the right wheel on the front side of the vehicle, and comprises a line laser used for vertically emittinglaser rays to the road surface, and a three-dimensional camera used for capturing scattered laser rays and performing height extraction on the captured laser rays so as to acquire height data of a road section; and the detection module is used for acquiring a detection result of road flatness according to the height data of the road section. According to the device disclosed by the invention, thecombination of the line laser and the three-dimensional camera is utilized to accurately measure and acquire the detection result of road flatness, and the device is suitable for measurement at various speeds and meets the requirements of urban road flatness detection, so that the accuracy, applicability and reliability of road flatness detection can be effectively promoted, and the detection is simple and can be easily realized.

The invention discloses an automobile seat adjusting method and device and a computer readable storage medium. The method comprises the steps that the road data detected by a first sensor and the weight data of a driver and passengers measured by a second sensor are obtained, and the seat adjustment angle is calculated according to the road data and the weight data of the driver and passengers; apreset seat adjustment angle numerical range corresponding to the road data and weight data is obtained, and whether the calculated seat adjustment angle is within the preset seat adjustment angle numerical range or not is judged; and if the calculated seat adjustment angle is within the preset seat adjustment angle numerical range, automobile seats are adjusted according to the calculated seat adjustment angle. By means of the automobile seat adjusting method, adaptive adjustment of the automobile seats along with the road condition and the weight condition of the driver and the passengers can be achieved, so that the impact transmitted to the driver and the passengers due to road roughness is reduced, comfortable riding conditions are provided for the driver and the passengers, and the riding experience is improved accordingly.

The present invention is road roughness detecting method by vehicular vertical acceleration sensor. The vertical acceleration signal is converted into output various roughness signal to complete the measurement of ground roughness. The signal output terminal of the vertical acceleration sensor is connected to the signal input terminal of serial or parallel A / D converter and the output terminal ofthe serial or parallel A / D converter is connected to computer. Inside the detectoin box, the vertical acceleration sensor and the serial or parallel A / D converter are installed on the same base boardand fixed in the same sealed dead weight calibrating box. The measurement method can obtain the vertical acceleration of the vehicle and the high frequency and low frequency ground roughness.

The invention discloses a fuzzy control system and method for an interconnection state of a transverse interconnected air suspension, and belongs to the field of vehicle air suspension systems. According to the fuzzy control system and method, an integrated fuzzy-PWM interconnected control algorithm ECU is composed of a data processing module, a fuzzy logic controller and a PWM controller which are sequentially connected in series; unsprung mass accelerated speed is output to a road surface recognition module through an unsprung mass accelerated speed acquisition module; vehicle speed is obtained and correspondingly transmitted to the road surface recognition module and the fuzzy logic controller through a vehicle speed acquisition module; lateral accelerated speed is output to the data processing module through a lateral accelerated speed acquisition module; the road roughness coefficient is calculated and supplied to the data processing module through the road surface recognition module; the product of an adjustment factor and the lateral accelerated speed is output through the data processing module; and a break-make ratio is output through the fuzzy logic controller. According to the fuzzy control system and method for the interconnection state of the transverse interconnected air suspension, the interconnection state of the transverse interconnected air suspension is reasonably controlled, and the driving smoothness of the vehicle is improved.

The invention provides a method and system for reducing a steering wheel out-of-hand monitoring risk, a controller and a vehicle. The method for reducing the steering wheel out-of-hand monitoring riskcomprises: acquiring road roughness data; judging whether the road roughness data reaches a roughness threshold, if yes, closing out-of-hand monitoring control and generating warning information forwarning a driver to control a steering wheel, and if no, starting up out-of-hand monitoring control. According to the invention, a problem that misjudgment on the steering wheel out-of-hand monitoringrisk is easy to cause a danger to a vehicle can be reduced, a serious accident occurring when a driving auxiliary function works on a bumpy road is avoided, and not only safety is ensured, but also excellent man-machine interaction is ensured, and an abrupt case is avoided.

Systems and methods for operating an engine in a variety of different cylinder operating modes are presented. In one example, an actual total number of available cylinder modes is increased in response to a vehicle's suspension setting and road roughness. By increasing the available cylinder modes, the engine may be operated in a higher number of modes where one or more engine cylinders may be deactivated to conserve fuel. The number of cylinder modes is increased during conditions where vehicle occupants may be less likely to object to operating the engine with fewer active cylinders.

The invention discloses a road compactor with detection, wherein the road compactor with detection includes a compactor body; the left side of the bottom of the compactor body is fixedly provided with a compression roller device, and the upper part of the compactor body is provided with a cab; the cab is internally provided with an operation device; the middle of the bottom of the compactor body is fixedly provided with a water spray device, the right side of the bottom of the compactor body is fixedly provided with drive wheels, and the rear side of the compactor body is provided with an adjusting device; the adjusting device is fixedly connected with a detection device; the interior of the compactor body is provided with a PLC controller; the PLC controller is electrically connected with the operation device, the water spraying device, the adjusting device and the detection device. The road compactor has the advantages of reasonable structural design, convenience in operation, convenience in detection of road roughness and high work efficiency, and is conducive to promotion and popularization.

The invention discloses a road flatness calculation method and a system, and the method comprises the steps: collecting the driving data of a vehicle on a road, and the driving data comprise the driving speed of the vehicle and the gravitational acceleration of the vehicle; preprocessing the driving data to obtain a target gravitational acceleration; and based on a preset flatness calculation formula, calculating according to the target gravitational acceleration to obtain a road flatness coefficient. According to the method, the flatness of a road after traffic is measured, and a driver is reminded to effectively avoid a bumpy road section.

The invention provides a method, a device and a realization device of acquiring road excitation load. The method can be applied to the analysis of a vehicle's NVH performance, including acquiring roadparameters such as road grade and frequency range to be analyzed. According to road grade, the corresponding power spectral density function of road surface is selected. And according to the frequency range to be analyzed and power spectral density function, the device acquires road excitation load, including the frequency domain spectrum of road roughness. The invention reduces the cost and thecomplexity of acquiring road excitation load.

The invention discloses a tester and a method for testing surface evenness. The tester comprises a rectangular metal box with wheels at the bottom, wherein a piece of carbon paper is arranged at one side surface of the metal box, an electromagnetic relay is arranged at the top of the metal box, a certain quantity of round holes are arranged at the bottom surface of the metal box with equal intervals, rubber tubes with certain aperture are arranged in the metal box and correspond to the round holes, grooves are formed in the rubber tubes along the overall length in the vertical direction, the openings of the grooves are opposite to the carbon paper, metal pins with certain length are arranged in the rubber tubes, and the protruding parts of the top ends of the metal pins are in contact with the carbon paper at the openings of the grooves. According to the tester, the surface evenness tested by a three-meter ruler is improved. The test principle is simple, test operation is simple, and the test data is accurate and can be observed, the tester is economical and practical.

The invention discloses a method for quickly detecting the thickness of a road engineering concrete cushion by using a ground penetrating radar. The method comprises the steps of setting radar parameters: radar frequency 250MHz, time window 36ns and electromagnetic wave velocity v1=0.1m / ns; designing a detection path: detecting an engineering radar image of a project area road by adopting a cross-section method, and correcting the electromagnetic wave velocity according to the field road coring condition to obtain the electromagnetic wave velocity v2 or v3 of concrete in a specific proportion; obtaining files in the formats of HD and DT1, distinguishing the surface and the cushion of the project area road in EKKO-Project software by gain and debuff processing, and obtaining the flatness h of the road and the thickness h1 of the concrete cushion at the electromagnetic wave velocity v2 or v3; and comparing the flatness h of the road and the thickness h1 of the concrete cushion with road engineering acceptance standards to obtain a result about whether the road engineering quality reaches the standard. The thickness of the concrete cushion can be quickly obtained by adopting the method.

The invention discloses a road flatness detection device, which is arranged on a plurality of test vehicles, comprises a shell and a main control board arranged in the shell, and is characterized in that the main control board is electrically connected with an acceleration sensor configured to detect a vibration amplitude change value generated by pavement fluctuation; a plurality of laser sensorstransversely arranged and configured to emit test laser and receive reflected light reflected by the road surface to obtain image information formed by a plurality of paths of reflected light; an image processing module configured to obtain the height of a gap between the image processing module and a reference surface according to the image information; a data acquisition and processing module;a processor configured to obtain flatness information of the road surface according to the vibration amplitude change value subjected to analog-to-digital conversion and the position information of the test vehicle; and a communication module.

The invention relates to the technical field of road detection, in particular to a road flatness detection vehicle which comprises a vehicle body and a detection device arranged on the vehicle body and used for detecting road flatness. The detection device comprises a plurality of detection rods sequentially arranged in the width direction of the road, a plurality of piezoelectric sensors arranged on the vehicle body and located at the upper end of each detection rod and a processing module connected with the piezoelectric sensors at the same time, the detection rods are slidably connected with the vehicle body, and when the lower ends of the detection rods make contact with the surface of the road, the piezoelectric sensors are connected with the processing module. The upper ends of the detection rods abut against the piezoelectric sensors, the piezoelectric sensors are used for detecting the vertical movement distance of each detection rod so as to obtain protruding values of all positions of a road, and the processing module is used for obtaining the flatness index of the road after obtaining data detected by the piezoelectric sensors. The method has the advantages that the detection speed can be increased, interference on traffic during detection is reduced, the operation convenience is optimized, and the detection efficiency is improved.

The invention discloses a flatness detection device for road engineering construction, and relates to the technical field of road flatness detection devices. The whole frame is of a rectangular frame structure, a handle rod is welded and fixed to the bottom of the rear end of the frame through two Z-shaped supporting plates, two transverse supporting rods are symmetrically welded to the interior of the frame, and an electric control box is installed on the transverse supporting rod at the front end in a locking mode. A swing frame is rotatably mounted in the middle of the frame, and four longitudinally-supported six-edge positioning shafts are welded to supporting rods on the left side and the right side of the frame in a front-back symmetry mode. Two racks are symmetrically installed on the four hexagonal positioning shafts in a sliding mode, and two positioning holes are formed in the middle sections of the two racks at intervals. Through meshing power transmission of the two racks, the four swing rods and the swing frame can be synchronously driven to swing, open and close, and the problems that the swing rods and the five six-edge sliding shafts need to be subjected to swing, open and close step by step before and after use, and use is troublesome and inconvenient are solved.

Systems and methods for operating an engine in a variety of different cylinder operating modes are presented. In one example, an actual total number of available cylinder modes is increased in response to a vehicle's suspension setting and road roughness. By increasing the available cylinder modes, the engine may be operated in a higher number of modes where one or more engine cylinders may be deactivated to conserve fuel. The number of cylinder modes is increased during conditions where vehicle occupants may be less likely to object to operating the engine with fewer active cylinders.