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 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.

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 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 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 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 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.

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 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.