406 results about "Wheel sizing" patented technology

The present invention relates to a method for on-line detecting railway car wheel set diameter and its detection equipment. It is characterized by that it utilizes the projection information of light source of structure light on the wheel set tread and base point information detected by displacement sensor to detect wheel average diameter parameter and left-right wheels wheel-diameter difference parameter. Said method includes the following steps: speed detection, starting light source, starting inside surface detection and image collection, image treatment, fitting rolling circle and diameter parameter calculation.

The invention discloses an automatic calibration system of the diameter of a vehicle wheel based on satellite positioning, and a method thereof. The system of the invention comprises five modules and a map database, wherein, the map database is used for storing relevant information of train operation lines; the five modules are respectively a positioning module, a map matching module, a data recording module, a communication module and a main processor. By introducing a satellite positioning technology, the automatic calibration of the diameter of the vehicle wheel in a positioning system is realized by GNSS positioning information so as to reduce positioning errors caused by the diameter change of the wheel due to the wheel wear, thereby improving the precision of the train positioning.

A powered propulsion apparatus that is attachable to and detachable from, a wide range of conventional wheelchairs without modification of the propulsion apparatus or the wheelchairs. The propulsion apparatus converts a conventional manually powered wheelchair into a power driven wheelchair. The apparatus clamps to the front wheels of a conventional wheelchair with a clamping mechanism that is adjustable to accommodate a wide range of wheel-spacings and wheel sizes and accommodates an inexactitude of alignment between the clamps and the wheelchair. The clamping mechanism secures the wheel chair to the propulsion apparatus without damage or stress to the wheelchair components.

The invention relates to the technical field of train wheel diameter correction and discloses an automatic train wheel diameter correcting method. The automatic train wheel diameter correcting method includes the steps of firstly, determining the initial values of wheel diameters; secondly, arranging transponders, selecting two adjacent transponders on a straight line to serve as the basis reference of wheel diameter correction, and measuring the actual distance between the two transponders; thirdly, by a train, obtaining the operation distance in set time according the measured speed, and obtaining the updated wheel diameter values according to the ratio of the operation distance to the measured actual distance and the initial values of the wheel diameters; fourthly, performing validity check on the updated wheel diameter values; fifthly, filtering bad values of the updated wheel diameter values. The method has the advantages that the standard transponder system of a subway line is used as the auxiliary equipment for train wheel diameter automatic correction, and automatic train wheel diameter correction is achieved while system speed measuring and positioning precision is increased.

The invention discloses a four-bar linkage wheel carrier suitable for a diameter-variable semi-walking wheel. The four-bar linkage wheel carrier comprises six caster assemblies with the same structure and a hub assembly; upper lifting lugs of the six caster assemblies are respectively arranged on a hydraulic cylinder sleeve, and lower lifting lugs of the six caster assemblies are respectively arranged on a connecting plate; and four link bars are connected by use of pin shafts. Under the condition of hydraulic driving force, the hydraulic cylinder sleeve moves along the axis direction of a drive axle shell, so that the four link bars stretch and shrink; and a slide block moves along the sliding line direction in a slide rail due to stretching and shrinking of the four link bars, so that the wheel provided with the four-bar linkage wheel carrier realizes reducing. When the six caster assemblies are opened or closed, the diameter of the diameter-variable semi-walking wheel is changed.

The invention discloses a rail transit train wheel diameter calibrating method. The method comprises the steps that if the rail transit train wheel diameter calibrating conditions are met, the increase amplitude of rail transit train wheel diameter error tolerance values during slipping and idling are obtained correspondingly; the actual running distance of a train of which train wheels slip and the corresponding number of accumulated pulses thereof are obtained; the number of actual running accumulated pulses of the train of which the train wheels idle and the corresponding actual distance of a transponder in pair are obtained; a train wheel diameter value is calculated according to each cycle of the fixed pulse number of a speed sensor and the actual distance of the transponder, if an absolute value of the difference between the train wheel diameter value obtained through calculation of the round and a calibrated train wheel diameter value of the last round is smaller than the wheel diameter error tolerance value, the wheel diameter calibrating succeeds, and otherwise the wheel diameter calibrating fails; if calibrating succeeds, the train wheel diameter value is the arithmetic average of the train wheel diameter value obtained through calculation of the round and the calibrated train wheel diameter value of the last round; and if calibrating fails, the steps are repeated to calibrate the wheel diameter again.

The invention discloses a method and system for calibrating the train wheel diameter. The method comprises the following steps that firstly, a counter of a pulse distance measuring device and a counter of a speedometer are used for counting pulses of the pulse distance measuring device and pulses of the speedometer respectively, and when the counting is started, the pulse counting initial value of the pulse distance measuring device and the pulse counting initial value of the speedometer are recorded at the same time; secondly, after a train is driven for certain time, the pulse counting value of the pulse distance measuring device and the pulse counting value of the speedometer are recorded at the same time; thirdly, the train accumulation advancing distance is obtained according to the pulse counting value of the pulse distance measuring device and the pulse counting initial value of the speedometer; fourthly, the wheel diameter of the train is obtained according to the difference between the pulse counting value of the speedometer and the pulse counting initial value of the speedometer and the train accumulation advancing distance. Wheel diameter calibration can be carried out at any time in the driving process of the train, and the precision of wheel diameter calibration is improved.

The invention relates to a safety driving control and rescue system for wheel diameter variation and high-speed tire burst. The safety driving control and rescue system for wheel diameter variation and high-speed tire burst comprises a real-time monitoring module, an analysis and processing module, a central control unit and a wheel braking control module, wherein the real-time monitoring module is used for detecting rolling diameter of each wheel; the analysis and processing module is used for processing effective wheel diameter height variation amount; the central control unit is used for judging whether each wheel is in effective rolling radius variation or tire burst according to the effective wheel diameter height variation amount of each wheel transmitted by the analysis and processing module; and after the central control unit judges that one wheel is in variation and particularly in tire burst, the wheel braking control module controls a braking device to apply braking force different in magnitude in different acting time to each wheel according to the effective wheel diameter difference of two coaxial wheels when a vehicle is in the state of linear driving or curve driving so as to coordinate with control on engine driving force and further control real-time proceeding speed of each wheel. Therefore, the vehicle in wheel diameter variation or high-speed tire burst can be kept in an original stable driving state.

The invention discloses an obstacle-jumping robot provided with variable diameter wheels, comprising a left wheel component (1), a left wheel driving component (2), a right wheel component (3), a right wheel driving component (4), an overturning component (5), an overturning driving component (6) and a chassis component (7), wherein the left wheel component (1) is connected with the left wheel driving component (2) by a left wheel shaft (101), the right wheel component (3) is connected with the right wheel driving component (4) by a right wheel shaft (301), and the left wheel driving component (2), the right wheel driving component (4), the overturning component (5) and the overturning driving component (6) are installed on the chassis component (7). The robot not only can keep the minimum wheel diameter to stably drive on the flat ground by continuous smooth rims, but also can change the diameters of the wheels to span obstacles with different heights or drive on the rugged ground. Furthermore, when the robot comes across the situation that the wheels are difficult for spanning the obstacles, the counter acting force between an overturning arm and the ground can be utilized, so that the upward climbing capability of the robot can be improved to a certain extent.

A method and system for compensating for wheel wear uses position and/or speed information from an independent positioning system to measure some distance over which the train has traveled. Wheel rotation information and/or distance and speed from a wheel sensor over the distance is also collected. The wheel rotation information and distance and/or speed information are then used to determine the size of the train wheels and/or a correction factor that can be used to correct the information from the wheel sensor for wheel wear. The method is performed periodically to correct for changes in wheel size over time due to wear so that the wheel rotation information can be used to determine train position and speed in the event of a positioning system failure.

A turbocharger (100) has an asymmetric, twin scroll volute design, having a first volute (101) and a larger second volute (102). The larger second volute (102) eliminates the need for a wastegate and its associated actuator. The smaller first volute (101) is sized for rapid transients and rated torque, while the second volute (102) is sized such that the turbine inlet pressure is satisfactory for rated power. Furthermore, the turbocharger (100) preferably incorporates a mixed flow turbine wheel (108) rather than a radial wheel, which allows for a larger wheel size to be used while still maintaining inertia. The turbine housing (103) is improved wherein the first and second volutes (101) and (102) are asymmetric with respect to each other and preferably, are leaned toward the bearing housing to match the axial component of the mixed flow turbine wheel inducer (112).

The invention relates to a turning repair decision optimization method for rail transit vehicle wheel sets. The turning repair decision optimization method includes: subjecting eight wheel of one carriage to wheel set abrasion data preprocessing; establishing wheel set abrasion data driving models such as a wheel diameter abrasion model, a rim thickness abrasion model and a wheel set turning repair proportion coefficient distribution model; performing Monte Carlo simulation on rail transit vehicle wheel set abrasion and turning repair to acquire expected wheel set service life under the combination of different rim thickness preventing turning repair value and turning repair recovery value. By means of a genetic algorithm in the simulation, the expected rim thickness value and wheel diameter value after one specific turning repair are optimized with the optimization objectives that the wheel diameter loss is as low as possible and is possibly close to the rim thickness recovery value after turning repair; optimal turning repair decisions, namely the optimized rim thickness preventing turning repair value and turning repair recovery value, can be finally analyzed according to the expected simulated service life of the wheel sets.

The invention discloses a vehicle wheel with a variable wheel diameter. The vehicle wheel comprises a vehicle wheel outer profile and a variable-diameter device used for driving the vehicle wheel outer profile to deform, wherein the vehicle wheel outer profile consists of a plurality of small blades which are connected crosswise with each other end to end; the variable-diameter device comprises an eccentric connecting rod of which one end is rotationally connected with the small blades, a bull gear which is fixedly connected with the eccentric connecting rod and a driving part used for driving the eccentric connecting rod and the bull gear to rotate around a central shaft. The vehicle wheel with the variable wheel diameter has the characteristic of telescopic outer profile, so the vehicle wheel can avoid barriers, enhances balancing capacity while running on a complicated ground surface, reduces accident rate and is easy to operate.

The invention discloses a combined mechanism robot device adaptive to various obstruction environments, for solving various problems of the existing wheel or track robots in application. The invention has the basic functions of an ordinary obstruction crossing robot, synthetically applies the wheel and track driving forms and makes the robot able to be adaptive to various different road conditions by structure deformation, such as flat road surface, bumpy road surface, muddy road surface, and loose road surface, as well as road surface with a certain slope, and the invention fully uses the advantage of the wheel mechanism being able to rapidly run on the flat road surface condition and fully uses the advantage that the unit-area bearing force of the track is small and the road surface adhesion is large on other road surface conditions. The robot of the invention has reinforced special functions: in the course of running on the road surfaces, if meeting with obstructions: 1. if the obstruction is a ravine, the width of the ravine is less than 1/2 track length plus arm length; 2. if the obstruction is a bump, the height of the bump is lower than wheel diameter plus arm length, by continuous combined structure deformation, regulating the contact length, gravity center and pose of the robot and the ground, making the robot able to reliably cross the obstruction and not causing the robot to be blocked or immersed.

The invention discloses a train wheel diameter auto-calibration system based on precise ranging, comprising a positioning module, a map matching module, a data recording module, a communication module, a map database and a master processor, wherein the map database is used for storing related information of train operation lines, a TW-TOF (two way-time of flight) ranging module activates Kalman filtering according to an estimated value of a ranging error range provided, non-precise values are filtered via a warning function, the master processor is electrically connected with the TW-TOF ranging module, the positioning module, the map matching module, the data recording module, and the communication module, and the map database is stored in the master processor. The system according to theinvention has the advantages that locomotive wheels are automatically calibrated through the satellite positioning technique and the TW-TOF ranging module, assistance from ground equipment is not required, and accordingly, train positioning errors are fewer, train positioning precision is improved at the premise of reduced maintenance cost and train operation safety is ensured.

A method and system for compensating for wheel wear uses position and/or speed information from an independent positioning system to measure some distance over which the train has traveled. Wheel rotation information is also collected over the distance. The wheel rotation information and distance and/or speed information are then use to determine the size of the train wheels. The method is performed periodically to correct for changes in wheel size over time due to wear so that the wheel rotation information can be used to determine train position and speed in the event of a positioning system failure.

The present invention discloses a large wheel diameter outside diameter optical projection measuring equipment. It includes a mechanical positioning component and an optical measuring head mounted on the mechanical positioning component. Said optical measuring head is composed of back projection laser source, beam expander lens, optical slit component, imaging lens component, CCD camera and signal control processing device. It is applicable to diameter measurement of geometric revaling body whose wheel diameter is greater than 500mm, specially it is applicable to diameter measurement of geometric revolving body whose thread width is greater than 80 mm.

The invention discloses an automatic check method and device for the wheel diameter of a wheel set of a train. The method comprises the following steps: detecting the operation condition of the train in real time, and when the train is in an idle condition, executing the check for the wheel diameter of the wheel set; and in the process of executing the check for the wheel diameter of the wheel set, respectively acquiring the speeds and wheel diameters of adjacent trailers of each power shaft in the current train, and respectively checking the wheel diameter of the wheel set of each power shaft according to the acquired speeds and wheel diameters of the adjacent trailers. The device comprises a detection unit and a unit for checking the wheel diameter of the wheel set. The method and device disclosed by the invention can realize automatic check for the wheel diameter of the wheel set of the train and have the advantages that the implementation method is simple, the required cost is low, the check precision is high and the application range is wide.

The invention provides a wheel diameter compensation method and apparatus for a robot. The wheel diameter compensation method for a robot comprises receiving a driving command sent form a server, wherein the driving command indicates the robot to walk to a second positional point from a first positional point; acquiring a first displacement deviation between the robot and the first positional point, and walking to the second positional point according to the distance and the driving direction in the driving command; when the robot walks to the second positional point, acquiring a second displacement deviation between the robot and the second positional point; and according to the first displacement deviation, the second displacement deviation and the distance between the first positional point and the second positional point, correcting the current wheel diameter of the robot, and reporting the current wheel diameter after correction to the server. Considering that a wheel may be worn, the wheel diameter compensation method and apparatus for a robot can utilize the mode for automatically compensating the wheel diameter to improve the accuracy for the driving distance of the robot so as to realize accurate positioning of the robot.

The invention provides a magnetron roller device of a bicycle riding equilibrium simulating device. The magnetron roller device comprises a front roller made of metal, a rear roller, and a magnetron made of non-magnetic metal, is in parallel with the two rollers and is arranged at a rear lower part of the front roller. The bearing holes are arranged at two ends of the front roller, are provided with a roller bearing therein, and are connected to the holes at the front part of a left bracket and a right bracket via the roller spindles, the shaft sleeves and the fastener. The two ends of the rear roller are connected to the holes on a left support member and a right member via the same structure, the left support member and the right support member are connected to the holes at the rear part of the left bracket and the right bracket via a left support gyro shaft and a right support gyro shaft, and an elastic wheel screwed on to the gyro shafts. The magnetron is connected to the front parts of the left bracket and the right bracket via a left end shaft and a right end shaft at two ends and a magnetron bearing on the end shafts. A row of small magnetic strips are arranged in a position in parallel with a tubular axis and close to the front roller. A regulating handle is fixed on the outer side of the left end shaft of the magnetron via a small stud. A pin hole is arranged on the left end surface of the magnetron, and a small pressure spring and a half-round movable pin in the pin hole are correspondent to the spacing blind holes on the inner sides of the left bracket and the right bracket. The notches are arranged on the inner sides at the rear part of the left bracket and the right bracket for spacing the left support member and the right support member. The antiskid gaskets are arranged at the bottoms of the left bracket and the right bracket.

The invention discloses a rim-separable wheel diameter variable mobile obstacle crossing robot, which comprises a machine body; one passive wheel expanding device is arranged at each of left and right sides of a rectangular machine box; every passive wheel expanding device comprises a driving motor, and an output shaft of the driving motor is fixedly connected with one end of a rotating spindle; the other end of the rotating spindle is rotationally connected with the middle of a chute ring base; an inner spoke is fixed in the rotating spindle, and three first connecting arms are arranged on the inner spoke; three second connecting arms are arranged on the chute ring base, a chute is arranged in the middle of every second connecting arm and arranged along the radial direction of the chute ring base; a driving unit is arranged between every first connecting arm and the second connecting arm. The device can equivalently realize the leg type movement function, and has high-speed movement performance and effective obstacle crossing ability.

A method for providing traction control on a wheeled vehicle involves receiving a speed reference signal. A variance in wheel size between a first and at least one other wheel of the vehicle is determined. Lastly, a drive control signal operable to control power to each of the first and at least one other wheel is output, the drive control signal being based on the speed reference signal and determined variance in wheel size and operable to provide that a tractive force exerted by each of the wheels on a corresponding surface during traction and/or braking is substantially similar.