495 results about "Wheel load" patented technology

A vehicle stability control system includes a basic request driving force computing unit, a front and rear wheel load computing unit, a virtual turning radius estimating unit, a target value computing unit, and a vibration damping correction controlling unit. The basic request driving force computing unit computes a physical quantity so as to generate the basic request driving force requested by a driver. The front and rear wheel load computing unit detect a load applied to the wheels. The virtual turning radius estimating unit estimates a virtual turning radius. The target value computing unit computes a target value of a stability factor. The vibration damping correction controlling unit corrects the physical quantity so as to follow the target value. The system generates the driving force for the driving wheel.

The invention relates to an automobile stability parameter test bench and a test method using the same, which are used for integrally testing automobile mass parameters, centroid position parameters and anti-tipping angle parameters. The automobile stability parameter test bench of the invention comprises a measuring platform, four platform balances, platform supporting columns, a foundation, three hydraulic cylinders, an inclination angle measuring device, hydraulic sensors, a pump station and a computer, wherein the four platform balances are installed on the measuring platform and are supported by a weighting sensor; the supporting points of the platform supporting columns are distributed in rectangular peaks; the foundation is used for bearing the supporting columns and the platform; the three hydraulic cylinders are arranged between the platform and the foundation and can enable the platform to incline longitudinally or laterally; the inclination angle measuring device is fixed on the platform; the hydraulic sensors are installed in the positions of the upper cavity and the lower cavity of the two hydraulic cylinders which enable the platform to incline longitudinally; the pump station is connected with the hydraulic cylinders; and the computer is used for acquiring and calculating the data of the weighing sensor, the oil pressure of the hydraulic cylinders and the inclination angle data of the platform. Compared with the existing test equipment, the invention can finish tests of automobile total mass, axle loads, wheel loads, centroid positions, anti-tipping angles and the like, so that the test workload and the test cost of the parameter tests are greatly reduced.

Method for determining structural parameters of a railway track having a sensor array, includes measuring vertical and / or lateral irregularities of the rail with the sensor array along the rail, thereby providing signals corresponding to geometrical irregularities at different distance from the wheel-load. A model is provided describing the rail's deflection shape, which is dependent on structural parameters of the rail and on the loads on the rail. The model is stored in a processor where geometrical irregularities are compared under different load influence for generating a measured deflection shape. At least one theoretical rail deflection shape is generated using the model by varying structural parameters and the load in the model. At least one of theoretical deflection shapes is compared with the measured deflection shape for each point of the rail, and the structural parameters of that theoretical deflection shape which best matches the measured deflection shape are determined.

In a control device for controlling a variable element of a wheel suspension system, the variable suspension element associated with one of the wheels is controlled at least according to an output of a sensor associated with a different one of the wheels. The output of the sensor may include a sprung mass speed of a vehicle part associated with each wheel. The variable suspension element may include a variable damping force damper or a variable spring constant spring. Thereby, an undesired response of a vehicle body can be avoided even when a vehicle is subjected to an uneven distribution of wheel loads such as when the vehicle is traveling over a slanted road surface or making a turn.

The invention discloses a stability parameter test board for an automobile and belongs to the technical field of measurement. The test board is used for integrally testing a quality parameter, a mass center position parameter and an anti-rollover angle parameter of the automobile. The stability parameter test board consists of a measuring table board, four platform scales, a table board pillar, a foundation, three hydraulic cylinders, an inclination angle measuring device, hydraulic sensors, a pumping station and a computer, wherein the platform scales are arranged on the measuring table board and supported by a weighing sensor; supporting points of the table board pillar are distributed in a form of rectangular top points; the foundation is used for supporting the pillar and the table board; the three hydraulic cylinders are arranged between the table board and the foundation and can make the table board incline longitudinally or laterally; the inclination angle measuring device is fixed on the table board; the hydraulic sensors are arranged at upper and lower cavity positions of two hydraulic cylinders which make the table board incline longitudinally; the pumping station is connected with the hydraulic cylinders; and the computer is used for acquiring data of the weighing sensor, oil pressures of the hydraulic cylinders and the inclination angle of the table board and performing an operation. The table board has the advantage that: compared with a conventional test device, the device can complete tests on the total mass, the axle load, the wheel load, the mass center position, the anti-overturn angle and the like of the automobile, so the test workload and the test cost of the parameter test are lowered.

The invention relates to a hydraulic and control method, in particular to a vehicle-posture adjusting system tire load control method, which is characterized in that: an adjusting system comprises a suspension, an oil tank, a hydraulic pump, a hydraulic control retaining valve, a three-level four-way proportional reserving valve, an adjustable throttling valve, oil cylinders and a two-level two-way valve; a target height, a target velocity and a target load percentage of a vehicle under a normal road driving state are preset, then the current vehicle height is detected, the detected current vehicle height is compared with the target vehicle height for analysis, and the treatment is carried out in an ascending situation, a descending situation and a non-adjusting situation according to thecomparison result of the detected current vehicle height and the target height. A controller is used for monitoring the information of displacement and pressure of the oil cylinders, so the pressure of four suspension oil cylinders can be reasonably distributed, the reasonable distribution of the tire load can be guaranteed during the vehicle posture adjusting process, and the problem that the distribution of the tire load is unreasonable because of the adjustment of the vehicle posture can be solved.

The invention discloses a movement posture monitoring method based on a wheeled intelligent sensing wheel, which comprises the following steps: an equatorial plane of a hub of each wheel of a vehicle is provided with a top-free microinertia measuring unit, sensing signals are conditioned, digitized and calculated by a posture algorithm way, and main movement posture parameters of the wheels are obtained; the main movement posture parameters of the monitored wheels comprise tangential acceleration, sideward acceleration, acceleration centripetal, advance speed, side velocity, angular acceleration, camber angles, slip angles, heading angles, and the like; after the parameters are inosculated and analyzed through a plurality of sending data, the movement safety condition of the wheels such as the unbalanced degree, looseness, fly off, slippage, and the like of wheels can be monitored and actively estimated, thereby being favorable for preventing and reducing the occurrence of traffic accidents.

The invention discloses a wheel load-based type intelligent sensing four-wheel positioning measurement method. The method comprises the following steps of: sensing the three-dimensional accelerations of specific points of wheels by using an intelligent sensing module; acquiring initial attitude angles of the wheels by using the three-dimensional acceleration parameters of the specific points of the wheels and an attitude algorithm and solving positioning parameters of the camber and the front wheel toe-in among the four wheels; establishing a kingpin caster angle and kingpin inclination computation model and solving positioning parameters of the kingpin caster and the kingpin inclination among the four wheels; and merging and analyzing four-wheel positioning parameters of the wheels, namely the camber, the front wheel toe-in, the kingpin caster and the kingpin inclination, to acquire a variation trend of the four-wheel positioning parameters of the wheels. By performing multi-sensor data merging and analysis on the parameters, the wheel load-based type intelligent sensing four-wheel positioning measurement method has the advantages of fully monitoring and predicating a wheel positioning state, ensuring the stability and the safety of automobile driving, reducing the abrasion and the oil consumption of automobiles, improving the steering performance of vehicles and ensuring automatic aligning of steering systems, and is a novel method for wheel positioning measurement.

A simulation tester for self healing of asphalt concrete cracks comprises a main frame, a test control and data collection system, an environment simulation box, a rigidity water tank, a test piece, a test piece limit clamp, a wheel load simulation device, a test piece healing force application device, a loading frame horizontal reciprocating moving mechanism, a temperature environment control device and a water circulation system simulating humidity environment. The main frame is provided with the environment simulation box which is at least composed of an inner rigidity layer, an outer rigidity layer and a middle heat insulation layer. The rigidity water tank is installed on the bottom wall in the middle in the environment simulation box, the test piece and the test piece limit clamp are installed in the rigidity water tank, the wheel load simulation device is arranged vertically above one side of the test piece and contains test wheels in rolling fit with the corresponding test piece, a test piece healing force application and test device is arranged horizontally on the other side of the test piece, the wheel load simulation device contains a loading frame which is provided with the loading frame horizontal reciprocating moving mechanism, and the water circulation system simulating humidity environment is arranged under the rigidity water tank. The simulation tester is high in automation degree, accurate in control, capable of simulating and researching self healing actions of the asphalt concrete cracks under various work conditions, convenient to operate, safe and reliable.

A real-time vehicle overload monitoring method belongs to the technical field of highway traffic safety, and is characterized in that the dynamic state load of each wheel is measured by a real-time vehicle weighing system mounted on a vehicle, the static state load of the loaded vehicle is measured by a vehicle load correction system, the two are fitted by the real-time vehicle weighing system to obtain the weight value of each wheel weight capacity, the last weight value is taken as the weight value for calculating real-time load, the operation is repeated time after time until two adjacent weight values are within the error ranging from 2%-5% during stable running, the vehicle load at the moment is calculated out, a wireless alarm signal is sent out if the vehicle load exceeds the ratedload of the vehicle type, the remote monitoring to vehicle overload is realized, and the weight value of each wheel load is corrected once every time when the wheel passes through a weighing platform. The method combines static load measurement and dynamic measurement effectively by utilizing the internet of things, thereby forming a dynamic regular correction mechanism, which has the characteristics of high precision, small size and convenience for installation, and has the advantages of real-time monitoring.

The invention discloses a monitoring method based on wheel load type intelligent sensing wheel dynamic load. The method comprises the following steps: an intelligent sensing module is arranged on a hub equatorial plane of each wheel of a motor vehicle, an intelligent sensing unit without gyroscopic inertia is arranged in the vehicle, and an intelligent sensing unit is hung in the vehicle to carry out complete inspection of the driving condition of the vehicle. Signal conditioning, digitalization, posture algorithm and dynamic load algorithm are carried out to various sensing signals to obtain main dynamic load parameters of the wheel. The dynamic load parameters are merged and analyzed by multiple sensing data and can be used for monitoring and actively evaluating the driving safety condition of a motor vehicle. The method can previously warn overload, tyre burst, brake performance fault, and the like of the motor vehicle, and is beneficial to avoiding and reducing the occurrence of traffic accidents.

The invention provides a weight-in-motion system for vehicles and a weighing method thereof. The weight-in-motion system comprises a controller and multiple wheel load weighing sensors, wherein the controller is respectively connected with the multiple wheel load weighing sensors, an abnormal driving data compensation weighting method is characterized in that the value of the vehicle driving accelerated speed is calculated and is compared with a threshold value of the vehicle driving accelerated speed, whether the vehicle drives normally is judged and abnormal data are compensated, and then the dynamic wheel load of a vehicle to be detected is calculated; and an abnormal wheel load information filtering and weighing method is characterized in that each piece of wheel load information is compared with a preset wheel load information threshold value so as to judge whether the wheel load information is abnormal and perform the compensation on abnormal data, and then the dynamic wheel load of the vehicle to be detected is calculated. The weight-in-motion system for the vehicles has the advantages of scientific design and high weighing precision; and the weighing method has the advantages of scientific design, high weighing precision, automatic error correction, cheating prevention, and vehicle driving state detection intellectualization.

The invention discloses a rail transportation axle-counting device for packaging FBG based on semi-freedom degree, which is used for carrying out axle-counting on trains which passes by. The rail transport axle-counting device consists of a sensing part and a control and analysis part, and is characterized in that the sensing part comprises a laser light source, an optical circulator, an FBG strain sheet and a photoelectric detector; and the control and analysis part is an axle-counting detector; and the FBG strain sheet is fixed on a package tool connected with the bottom of the rail in a semi-freedom degree mode. In the invention, the FBG strain sheet is packaged by using the semi-freedom degree mode so that the intensity self-demodulation on the subjected strain can e realized without an additional edge filter, a system structure is simplified and the cost is greatly reduced. The axle-counting device can acquire whether wheels of the train pass by or not according to the intensity change of reflecting light and can acquire wheel axle information of wheel load from the intensity change of the reflecting light.

The invention discloses a multifunctional integrated automatic hydraulic closed load test table, which is formed by a computer control system, a simulate load system, a pressure-constant oil source and oil tube, and a mechanical system. Wherein, the simulate load system is formed by a driving unit, a secondary output unit, a left wheel load unit, and a right wheel load unit. The test table is a cross shape while the center is the tested element; the wheel and bridge of tested element is at the center of test table; the resistance load generated by the load unit simulate wheel and the back bridge supply torque to the output of tested element; the torque is transmitted to the computer control system which can control the whole system; the pressure-constant oil source uses motor to drive the pressure-constant variable pump; the mechanical system comprises a clamp integration, a cast iron table, a gear box and a secondary element clamper. The invention can realize the 1+3 load mode, while the load power can reach 350KW, to meet the demand of full-power load test of variable heavy off-road vehicle driving bridge and wheels, to realize the automation of load system.

In a braking device of a motorcycle, in which a rear wheel braking mechanism is operated in conjunction with a front wheel braking operation, accurate determination of a reduction in rear wheel load is provided, and additional reduction of the rear-wheel load is prevented. Determination of a reduction in rear-wheel load is based on vehicle speed in the front wheel braking operation, hydraulic pressure of a brake caliper on the front wheel side, and respective slip ratios of the front and rear wheels. When the rear-wheel load is reducing, hydraulic pressure of a brake caliper on the rear wheel side is controlled so as to keep the slip ratio of the rear wheel at or below a set value. A hydraulic modulator supplies / evacuates the hydraulic pressure to / from the brake caliper on the rear wheel side, and the slip ratio of the rear wheel is controlled by electrically controlling the hydraulic modulator.

The invention relates to a bituminous mixture circuit wheel tracking test device and test method. The device comprises a working platform and a temperature control box, and a power assembly and a controller are disposed on the working platform. The controller is connected with a computer, and a circular rail is disposed on the bottom of the temperature control box. A placing platform connected with the power assembly by a transmission shaft is disposed in the temperature control box, and the placing platform runs at low speed driven by the power assembly with the transmission shaft. An acceleration wheel group is installed on the bottom of the placing platform, and a circular testing mold is disposed on the top of the placing platform. A lifting support is disposed on the top of the circular testing mold, and a pressure head or a wheel load is connected with the middle part of a beam of the lifting support by a load fixed link. The device and the method can realize the moulding of the test pieces with different structure types and function integration of the moulding and the wheel tracking test, and the test pieces drive the wheel to rotate by performing circling motion in single direction, so that the circuit in single direction formed in the test pieces by the wheel is guaranteed which accords with the actual stressing state in road driving, and the wheel tracking test result is real and reliable.

The invention discloses a bogie frame which comprises two lateral beams and at least one beam. The beam is connected with the lateral beams through rubber joints so as to buffer vertical force borne by a connecting point when a railway vehicle passes through a curve. Torsional moment generated by the vertical force on the bogie frame is reduced, torsional rigidity of the bogie frame is reduced, rate of wheel load reduction and derailing coefficient are reduced, and train operation safety is improved.

The invention discloses a method for estimating a safety domain of a track irregularity amplitude in the technical field of track traffic safety. The method comprises the following steps of: establishing a wheel / rail dynamics simulation model; inputting track irregularity data into the wheel / rail dynamics simulation model to obtain derail coefficient, wheel load reduction rate and wheel / rail cross force, and smoothing the derail coefficient; marking the track irregularity data once; performing grid division of the track irregularity data, counting the track irregularity data in grid to obtain dangerous point distribution rate of the grid, and completing secondary marking on the track irregularity data; and training a support vector classifier; and finally testing the trained support vector classifier, if a reference standard is reached, determining that the support vector classifier is available, otherwise, training the support vector classifier again. The method can be used for quantitative evaluation of a geometrical shape of a high-speed railway track on traffic safety.

The present invention relates to a passenger car mass center position measurement device and measurement and calculation method, and belongs to the automobile test field. The passenger car mass center position measurement device and measurement and calculation method comprises a hydraulic jack, an induction type displacement sensor, a rubber blanket with a groove, a stay wire displacement sensor, a wheeled pallet, a front wheel position laser range finder, a back wheel position laser range finder, a jack position laser range finder, a front wheel sucker type laser range finder installing device, a back wheel sucker type laser range finder installing device, a jack position movable laser range finder installing device, a wheel load instrument, an information conditioning device, a data collection card, a computer and a measured passenger car, and is characterized in that after an automobile is lifted by the hydraulic jack, the wheel load instrument measures the loads of the shafts of the passenger car, the laser range finders measure the wheel base and the lifted height of the passenger car, and the data is sent to the computer to process, thereby obtaining the concrete position of the mass center of the passenger car. The device is simple in structure, high in measurement precision and wide in application range.

The invention relates to a power wheelchair, comprising a seat part, a running mechanism and a control unit which is positioned between the seat part and the running mechanism. The running mechanism comprises a plurality of chair wheels to realize the displacement of the power wheelchair. The chair wheels are macnum wheels, each of which comprises a wheel body with a circle in the center and a plurality of rollers positioned at the periphery of the wheel body, the axes in the center of each roller and in the center of the wheel body form an acute angle; the running mechanism also comprises a plurality of driver motors corresponding to the macnum wheels respectively, the control unit is electrically connected with the driver motor, receives the operation signals of the wheelchair from the outside and converts the operation signals into command signals; the command signals are output to the driver motor; each macnum wheel is driven independently in a way that the control unit drives the motor. The power wheelchair can respectively drive a plurality of the macnum wheels independently in a way that the macnum wheels can change direction during the process of rotation, thus realizing omnibearing rotation.

The invention discloses a track following control method used for a rubber-wheel low-floor intelligent railway train. In an advancing process of the rubber-wheel low-floor intelligent railway train, steering angles of all the wheels are calculated in real time, and a steering angle-driven steering system is controlled to steer in real time, so that all the wheels advance on the same track. The track following control method used for the rubber-wheel low-floor intelligent railway train has the advantages that the control is more accurate, the turning radius can be reduced and the travelling flexibility can be improved.

The invention discloses a system for testing the comprehensive performances of an unmanned vehicle, relates to the technical field of car testing equipment, and solves a technical problem of the testing of an unmanned vehicle. The system comprises a foundation platform, a side moving platform installed on the foundation platform, a rotation platform installed on the side moving platform. The front part of the rotation platform is provided with two front wheel supports which can slide left and right, and a front wheel span adjustment mechanism. The rear part of the rotation platform is provided with two rear wheel supports which can slide back and front, and an axle span adjustment mechanism. Each front wheel support is provided with a front wheel drum frame which can rotate horizontally, and each front wheel drum frame is provided with a front wheel rotating drum, and a front wheel load wheel which is used for driving the front wheel rotating drum to rotate. Each rear wheel support is provided with a rear wheel rotating drum, and a rear wheel load motor which is used for driving the rear wheel rotating drum to rotate. The system provided by the invention can test the longitudinal and lateral performances of the unmanned vehicle.

The invention discloses a bending plate type tire device. The bending plate type tire device comprises a wheel rim, wherein a plurality sets of supporting pieces which are continuously bended are fixed on the circumference annular surface of the wheel rim through fastening pieces; a band lining is arranged on the outer parts of the supporting pieces in a padding manner, and is wrapped with a packing piece, or an inflatable cover tire is arranged on the outer part of each of the supporting pieces; the longitudinal section of each supporting piece is in a flat S shape, and each supporting piece is divided into a mounting section, a neck bend, a straight section, a shoulder bend, a working section and a tail section, wherein a tail inserting groove is formed in the surface of the tail end of the working section, and is circular; a jointed part of the tail inserting groove and the tail section of each supporting piece forms a triangular space; a plurality of bosses radially facing outwards are arranged at the position, close to the tail section, of the tail inserting groove. According to the bending plate type tire disclosed by the invention, compared with the prior art, one or more sets of plate-shaped elastic supporting pieces which are mutually connected and continuously bended are mounted on the wheel rim, so that the functions of elastically supporting a wheel load, driving and braking are realized, and the requirement that a vehicle can durably and safely operate in multiple complex and harsh environment is met.

The invention relates to a testing system and a testing method, in particular to a testing system and a testing method applied to a testing of the high temperature deformation resistance of an asphalt airport pavement; the invention aims at solving the problem that an asphalt airport pavement material testing is conducted under the conditions of low load and single-wheel load and the condition that a load action form does not meet the practical situation due to the fact that an existing method of evaluating the high temperature permanent deformation resistance of the asphalt airport pavement depends on a method of evaluating the rutting resistance of a highway engineering bituminous mixture. The testing system disclosed by the invention comprises a motor, a motor supporting seat, a main shaft, a plurality of guide pillars, a top fixed plate, a bottom fixed plate, a rubber wheel supporting disk, a charging tray, a supporting plate, a hydraulic cylinder, a pressure sensor, rubber wheels, a plurality of supporting wheels, an upper bearing block, a lower bearing block, a rubber wheel disk connecting sleeve and a bottom plate; the top fixed plate, the bottom fixed plate, the supporting plate and the bottom plate are arranged in parallel from top to bottom in sequence; the guide pillars are evenly distributed. The testing system and the testing method disclosed by the invention are used for the field of road and bridge construction.

The invention discloses an airplane power-driven safety control system and a control method of the airplane power-driven safety control system. A correct instruction can be given to an operator on the ground, and besides the power supply of a power-driven cabin door can be reliably cut off in the flight process. The safety control system comprises an external signal module, a sensor module, a sensor processing and controlling module and a power-driven cabin door controller. The external signal module is provided with a wheel load bus signal module, an engine idling signal module and a wheel load hardwire signal module. The sensor module is provided with a locking sensor, wherein the locking sensor is used for collecting a position signal of the locking position of the airplane power-driven cabin door. The sensor processing and controlling module is used for controlling whether to supply power to a relay or not on the basis of signals collected by the wheel load bus signal module, the engine idling signal module and the locking sensor in the sensor module. The power-driven cabin door controller is used for controlling the power-driven cabin door to be opened or closed on the basis of the wheel load hardwire module and a cabin door opening instruction.

The invention discloses a method for detecting the side turnover of a vehicle. The active braking stimulation is applied to left and right wheels (2) and (6) on a wheel axle through brakes (3) and (5) with active braking functions, so as to acquire wheel angular speed and angular acceleration responses of the wheels under the braking stimulation, and the longitudinal acting force, which acts on the wheels, of a road surface is calculated by a wheel rotation kinetic equation. In the condition of presuming that the road surface adhesion of the left and the right wheels is the same and specific, nominal loads on the left and the right wheels are estimated by utilizing a relation among the longitudinal force, a slip rate and a wheel load in a tire model, and the nominal loads approximately have a proportional relation with actual loads on the wheels. Therefore, the transfer rate of a transverse load of the vehicle can be accurately estimated by utilizing the nominal loads, so as to judge the side turnover risk of the vehicle. The method is not influenced by the structural parameter of the vehicle, and the accuracy and the reliability of predicting the side overturn are high.

The invention relates to an asphalt mixture viscoelastic property test method based on a wheel load instrument. In the method, the wheel load instrument, a test piece, a dynamic modulus test and a creep test are provided. The method comprises the following steps: a, before the test, assembling a strain sensor at the bottom of an asphalt mixture test piece and calculating by a mechanical method or a finite element analysis method to obtain the stress distribution condition of the test piece under the action of moveable load according to moving wheel load features and the test piece size; b, during the test, employing the modulus test and the creep test: measuring the tensile deformation strain capacity of the test piece by using the strain sensor, and measuring the tensile deformation strain capacity of the test piece through the strain sensor; and c, after the test, obtaining the stress and the strain capacity of the test piece and the action time of the wheel load by the wheel load instrument and the strain sensor. The method has the characteristics of simplicity, practicability, high operability and high applicability. According to the method, the stress characteristic of the test piece during the test is similar to the actual asphalt concrete road surface, and the viscoelastic property obtained by the test is accurate and reliable.