Device for determining angular vibration of vehicle wheel. RU patent 2245536.
 Device for determining angular vibration of vehicle wheel / 2245536Device has testing bench and control device which comprises storing device, unit for generating signals of recording dependence of angular deviation on time, unit for decoding discrete signal and its interpolating, correlation unit, and unit for calculating power spectrum. |
 Method of and device for optical scanning of vehicle wheel / 2267110According to proposed method, wheel section is being scanned by means of light beam radiated by light source 6, and reflected light beam is detected by receiver 7 sensitive to change of position. Distance from section under scanning to initial point is measured account of directions of radiated and reflected beams. Receiver 7 sensitive to change of position is turned synchronously with light source 6 by means of turning device around common axle 4 to provide successive measurements. |
 Stand for testing single-axle propulsion device at variable vertical load and curvilinear movement / 2284022Proposed stand contains carrier connecting slewing gear with frame on which drive of wheeled propulsion device is mounted, and driving axle with wheel to be tested. Stand is provided with additional frame with second wheel and loading device to create and control variable load in value and frequency. Stand is furnished with two hydraulic cylinders to remove vertical load from wheels under testing and is made with possibility of changing angle of setting of wheeled propulsion device in plan by means of screw tie-rods and with possibility of changing radius of turning of wheel propulsion device by means of bushings installed in carrier. |
 Test stand for amphibious vehicles / 2335749Test stand for amphibious vehicles has basin with entrance and exit ramp, side walls, road, ramp and basin borders. From both sides of exit ramp pits are made in which ends of tubular shaft are embedded. Parallel arms-brackets of sheet metal are attached to the shaft equally spaced from axis. Between attached arms-brackets, spacer pipe is preliminary embedded on shaft which pipe has rectangular pawl with holes on both sides. By means of these holes the pipe is attached to captivating sheet located on symmetry axis of exit ramp. At the end of arms-brackets with lugs, cylinder is attached on axis. This cylinder is made along generator of curve corresponding to curve of vehicle front bumper. Tube rings with pawls are put on shaft ends. The pawls are fixed on pit floors. Spheroidal flanges are fixed on shaft ends to which flanges arms are attached, with brought-out from pits ends having lugs, and pneumatic cylinders are attached to arms from two sides. |
 Method for measuring diametre and «offset» of vehicle wheel disc on balancing stand and device for its implementation / 2365887Invention refers to machine tool industry, specifically to balancing stands for contactless measuring diametre and "offset" of vehicle wheel disc. The method consists in contactless measurement of diametre and offset of wheel disc by means of transformation of electronic images obtained from optical receiver installed on stand frame. Image pictures are projections of cross-sections of wheel disc being measured which cross-sections are reflected from wheel disc rim butt and hub butt using at least one laser emitter also installed on stand frame. In this process laser emitter beam is transformed into vertical straight-line narrow light stripe. The device contains at least one laser emitter fixed immovably on the stand frame, optical receiver and computing device connected to receiver. Laser emitter beam transformed into straight-line narrow light stripe is directed to wheel disc rim butt and hub butt. Laser beam reflected from wheel disc rim butt and hub butt enters optical receiver designed for its receiving and digitising and transmitting to computing device intended for computing (calculating) actual measured diametre and offset of wheel disc. |
 Method of making disbalance test for, at least, one wheel of transport facility, and device to this end / 2418282Contactless measuring tool is used to measure one or each wheel 11 tested for disbalance. Said tool is directed toward the hub of tested wheel 11, in particular, laser scanner is mounted so that, in each revolution of said wheel, front and rear edges or top and bottom edges of wheel rim are recorded to determine, proceeding from distance there between, the central point of hole 17 in the rim of tested wheel 11. Proceeding from the change in position of central holes 17 in wheel rim, thus measured in each revolution of the tested wheel, wheel disbalance is determined. |
 Procedure and device for shock absorber test / 2424498Procedure for testing unit of steered wheel of aircraft containing shock strut consists in facilitating combined linear and rotary drive, in connecting lower end of unit with drive to ensure line of linear action of drive alignment with line of strut compression. The drive is actuated to compress the shock strut and there is actuated the drive with rotation to transfer moment of steering control to the unit. The linear drive can be connected with the unit via a power connection to ensure load on the shock strut. The test system is designed for testing unit of steered wheel of an aircraft containing the shock strut and contains the said combined linear and rotary drive. The device to unit testing including the shock strut consists of the drive connected to the unit by means of power connection to ensure shock strut loading. The drive corresponds to the combined linear and rotary drive, while the power connection includes the first part in the drive connected with the second part in the unit. The said two parts are interconnected and facilitate self-alignment at connection of the drive with the unit under a linear mode. |
 Mobile trailer stand for diagnostics, calibration, repair and wheel alignment / 2442127FIELD: auto service. SUBSTANCE: stand with chassis dynamometers is installed on the platform of a trailer. Every chassis is fitted with its own load and torque electric direct current motor. Every chassis has the metrologic adjustment of geometry installation on the platform which makes it possible to define exactly the contact points of the vehicle wheel protectors or measure precisely the misalignment of front and rear wheels when the vehicle enters the stand. The stand is fitted with the extend and locking devices for fixing the vehicle body mass from linear movement during its “movement” on the chassis, remaining in one place and working at all wheel rotary modes. EFFECT: higher measurement and wheel adjustment accuracy. 6 dwg |
 Method, device and system for vehicle wheels analysis / 2497092Proposed method comprises revolving vehicle wheel at preset rpm per unit time. Note here that tire tread in first area of contact is pressed at preset force to revolving drum to measure first acceleration in said first area of contact by appropriate meter. Another vehicle wheel with another tire of preselected configuration is revolved at preset rpm per another unit time. Note here that said second wheel is balanced by common method and has the other residual unbalance. Surface of the other tire other tread in second contact area is pressed at preset force against revolving drum to measure second acceleration in said second contact by appropriate meter. Vehicle wheel is considered balanced if first acceleration equals or is smaller than second acceleration. Invention covers also the device and system to this end including preset configuration tire and thixotropic balancing matter. |
 Device for determining characteristics of normal stiffness of airless tyre spokes / 2499241Device structure includes a frame, a device for loading of a tested spoke by vertical force, a force sensor, a linear movement sensor and a recording equipment. Besides, it includes upper and lower hold-down and thrust angles with attachment bolts located with a gap on both sides of the tested spoke both in upper and lower parts. Hold-down angles have oval holes for control of their position relative to the thrust ones. Force sensor is installed on support plates and position of the force sensor as to height is controlled by their number. Linear movement sensor is fixed in one vertical plane with a spoke and a reflector plate fixed on the force sensor. |
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Device for determining angular vibration of vehicle wheel / 2245536 Device has testing bench and control device which comprises storing device, unit for generating signals of recording dependence of angular deviation on time, unit for decoding discrete signal and its interpolating, correlation unit, and unit for calculating power spectrum. |
 Vehicle steerable wheels turning sensor / 2246713Proposed sensor is made in form of two supports 1 interconnected by crossmember 2. Stop 3 is mounted on one end of crossmember to thrust against external side surface of disk of vehicle steerable wheel 4. Other end of crossmember is provided with pin 5 spring-loaded relative to said crossmember for engagement with disk of wheel 4. Pin is connected through electromagnetic lock with one end of measuring strip 9. Other end of strip interacts with recording element 10 whose output is connected to corresponding input of electronic unit. |
 Wheel alignment gauge / 2251658Proposed wheel alignment gauge contains working member and measuring element. Working member can rotate around its axle, and measuring element secured on working member can come in contact with check points on surfaces under checking and can move along working member. Working member is made up of similar symmetrical parts and is installed on clamp connected with centering cones. Gauge is fastened by means of centering cones engaging with centering holes of axle-shafts or hubs of wheels. Gauge can be furnished with adapters with central conical holes designed for fitting on wheel, disks, when used on automobiles whose wheels have no centering holes. |
 Method of and device for checking vehicle steering gear summary play / 2266530Proposed method of checking summary play in vehicle steering gear comes to successively turning steering wheel from one to other side through angle exceeding possible play with subsequent recording of steering turning angle and displacement of steerable wheel by detectors and forming characteristics of play after which play is estimated by angle of turning of steering wheel after taking up play. Steering wheel turning angle detector is installed arbitrary on steering wheel rim in plane of its rotation, and displacement of steerable wheel is determined by displacement of point extreme from center of rim of steerable wheel in horizontal plane taking it as beginning of counting of steering wheel play, and end of counting is determined by two-fold displacement of said point in opposite direction. Summary play of steering gear is determined as difference of angle of turning of steering wheel from beginning of counting to first beginning of displacement of rim of steerable wheel with extraction of angle of turning of steering wheel from first to second beginning of displacement of rim of steerable wheel in the same direction. Steering wheel turning angle detector is fixed in three points in arbitrary place on steering wheel rim in plane of its rotation. Device for checking summary play in vehicle steering gear has steering wheel turning angle detectors and steerable wheel displacement detectors, and play calculator unit at output of which play indicator is installed, all being connected to supply unit. Play calculator unit includes series-connected analog-to-digital converter and microcontroller. Output of steering wheel turning angle detector made in form of gyroscope is connected to input of analog-to-digital converter whose output is connected to first input of microcontroller to first output of which play indicator is connected, and to second output, additional indicator-piezoradiator. Second input of microcontroller is connected to output of steerable wheel displacement detector, each element of circuit being connected to supply unit by common bus. Device is furnished with switch whose input is connected to third output of microcontroller, and outputs are connected to drivers of interface RS-232 and USB. |
 Device for checking play and force on vehicle steering wheel / 2273012Proposed device has telescopic member with stops on ends for fastening said member on rim of steering wheel and device for determining angular position of steering wheel made in form of indicator and scale secured on telescopic member with possibility of turning in plane parallel to plane of steering wheel and displacement of center of turning along telescopic member, steering wheel force sensor installed on one of end of telescopic member and made in form of two-way dynamometer, device for indicating moment of beginning of turning of steerable wheels of vehicle, and source of laser beam to be used as indicator. Signaling device contains movable electric contact installed on frame or front axle of vehicle to be tested for contact with rim of one of vehicle steerable wheels, and portable light indicator connected to supply source through said electric contact. Stops of telescopic member are furnished with spring catches to improved reliability of fastening of telescopic member on steering wheel. |
 Automobile controlled wheels convergence measuring device / 2292011Apparatus includes driving running drums kinematically coupled with drive system; driven running drums and measuring axially movable drums and in addition it includes carriages for supporting measuring movable drums, guides for carriages, pneumatic cylinders and displacement pickups. |
 Device and method for balancing actuator control unit / 2292022Proposed device includes control unit with balancing members with whose help bell crank is secured on shaft of electromechanical converter, swivel table with base, two movable stops and two voltmeters with power supply source. Method consists in applying an overload to bell crank of control unit in plane of symmetry of control unit by rotating the swivel table and measuring the center of mass of control unit balancing members. Prior to creating an overload, two movable stops are brought in contact with bell crank and moment of closing of electric circuits by movable stop and each end of bell crank is checked. Then stops are drawn away and equal definite clearances are set between ends of bell crank and stops. After creating an overload, moment of closing electric circuits of each end of bell crank is checked. In case closing of electric circuits is noted at different moments of time, cycle of above-mentioned operations is repeated at change of positions of centers of mass of balancing members with electromechanical converter switched-off till moment of simultaneous closing of electrical circuits by each end of bell crank under action of overload. |
 Method for proximate diagnostics of vehicle wheel setting angles / 2293963Proposed method for proximate diagnostics of vehicle wheel setting angles that can be also used to diagnose condition of hanger components and vehicle wheel setting angles includes installation of one wheel of one vehicle axle on rotary horizontal supporting platform and recording of parameters characterizing their setting angles while turning the wheels, other wheel of same vehicle axle being blocked; then platform is turned in horizontal plane within range of acting wheel-to-platform frictional forces, and measurements are made of distance corresponding to total integral clearances in hanger components and steering wheel trapezium at fixed points on wheels. Then wheels are synchronously rolled about their axis so that they turn through 90 deg., and distance corresponding to integral clearance in wheel bearings and in hanger components is measured at same fixed points. After that wheels are synchronously rolled again so that they further turn about their axis through other 90 deg., and distances characterizing degree of their convergence are measured at same fixed points on wheels occurring in diametric opposition to their position during first measurement. |
 Method of measuring summary play in vehicle steering gear / 2295714Proposed method come to fixing angle of turning of steering wheel from moment of being of movement of steerible wheels to one side till moment of beginning of movement to other side at running of vehicle. Summary play is determined by angle of turning of steering wheel between moments of appearance of side accelerations of opposite signs. |
 Device for measuring camber and caster of car steerable wheels / 2308015Device for checking steering geometry of vehicle steerable wheels contains horizontal platform with pads movable in horizontal plane for arrangement of steerable wheels of automobile. Using proposed device, measuring are carried out turning wheels with brakes applied. Device contains additionally two movable pads longitudinal displacement pickups and two movable pads cross displacement pickups. Values of cross displacement of movable pads indicated caster of steerable wheels and values of longitudinal displacement of movable pads, camber of steerable wheels. |
FIELD: testing of vehicles.
SUBSTANCE: device has testing bench and control device which comprises storing device, unit for generating signals of recording dependence of angular deviation on time, unit for decoding discrete signal and its interpolating, correlation unit, and unit for calculating power spectrum.
EFFECT: expanded functional capabilities.
4 dwg
The invention relates to the transport industry, in particular to research equipment for the execution of the steered wheels, namely determining the angular oscillations of the wheels relative to the longitudinal axis of the vehicle when the real dynamics of motion, and can be used in the diagnosis of their technical condition.
The closest technical solution (prototype) is a device for determining the angular oscillations of the wheels of the car (as the USSR № 1114913, G 01 M 17/06, 1984). This device contains a test bench and recording device. The test stand includes a channel and a circular sector. On both sides of the channel installed solar cells and the light source. Channel mounted on the beam front axle of the vehicle, and a circular sector is rigidly connected to the stub axle of the wheel and fixed in the regulations, coaxially with the axis of rotation of the wheel and the front beam of the vehicle, so that simultaneously lit the photocell from the light source through the middle slot. Circular sector is made of opaque material and has an elongated middle slot, and alternating at equal angular intervals in the radial slots of smaller length.
This device registers the deviation and the results recorded in the storage device, which is inconvenient from the point of view of calculation of the correction effects and summarize the experience. This device cannot be used in car repair.
The objective of the invention is to enhance the functionality and improve the accuracy of measurements due to signal processing and calculation of correction factors.
This object is achieved due to the fact that in the known device that contains the test bench connected to a recording device comprising the storage device and the signal reception according to the angle from time containing photodetector blocks, forming a rectangular pulse, the trigger and the logical elements in the recording device additionally introduced a decryption unit discrete signal and interpolation, containing connected in series decoding unit and the unit interpolation, the block correlation, containing serially connected unit delay, multiplied device, integrator and interface unit and the computing unit of the power spectrum containing device connected in series decomposition in the Fourier series, the device squaring and interface unit, and outputs the signal reception according to the angle of deviation from the time connected to the decoding unit, and the output of the interpolation is the output of a decryption unit discrete signal and its interpolation and connected to the input of the storage device, the input device time delay and multiplied device block correlation and the device decomposition in Fourier series the unit for computing the power spectrum, the outputs of the coupler block correlation and calculation of the power spectrum are connected with inputs of the storage device.
The proposed device is able to obtain the graphs of the behavior of the wheel in real time with high accuracy, and a graph of the correlation function and power spectrum. Comparing correlation functions, it is possible to determine the completeness of the corrective actions, and the power spectrum helps to identify the faulty link in the car, which provokes a vibration of the wheel. Therefore, the proposed device can be used not only for vehicle diagnostics, but also for its repair.
Figure 1 shows a block diagram of the proposed device in figure 2 is the waveform of the interpolated signal received by the memory device, figure 3 is the waveform of the correlation function in figure 4 is the waveform of the power spectrum.
Device for determining the angular oscillations of the wheels includes (1) test stand 1, is connected to the recording device 2. The test stand 1 consists of a channel and a circular sector. On both sides of the channel installed solar cells and the light source. Channel mounted on the beam front axle of the vehicle, and a circular sector is rigidly connected to the stub axle of the wheel and fixed in the regulations, coaxially with the axis of rotation of the wheel and the front beam of the vehicle, so that simultaneously lit the photocell from the light source through the middle slot.
Recording device 2 consists of a block of 3 signal-conditioning register according to the angle from time containing photodetector blocks, forming a rectangular pulse, the trigger and logic elements, block 4 decode a digital signal and interpolation, containing connected in series decoding unit 4.1 unit 4.2 interpolation, block 5 correlation containing serially connected unit delay 5.1, multiplied device 5.2, the integrator 5.3 interface unit 5.4 unit 6 calculation of the power spectrum containing device connected in series decomposition in Fourier series 6.1, the device squaring 6.2 and device pairing, 6.3, and storage device 7. The outputs of block 3 is connected to the decoding unit 4.1 unit 4, and output devices interpolation 4.2 is the output of block 4 and connected to the input of the storage device 7, the input devices of the time delay 5.1 and multiplied device 5.2 unit 5 and to the input of the decomposition in Fourier series 6.1 unit 6. The outputs of the device pairing 5.4 and device pairing 6.3 are respectively the outputs of blocks 5 and 6 and are connected to the inputs of the storage device 7.
The device operates as follows. When the wheel spins on the test bench 1 angular oscillation of the wheel is transmitted to a circular sector, which moves relative to the fixedly mounted on the axle of the front beam of the photoelectric cell and light source.
Proportional to the angular displacement of the wheel axis solar cells receive light from a corresponding number of slits sector, and depending on the direction of rotation angle of the wheel axis information, expressed in number of pulses, the electrical circuit unit 3 (figure 1) is transmitted to the decoding unit 4.1 unit 4.
In unit 4, the decoding unit 4.1 transmits information in the form of a polygonal curve that enters the device interpolation 4.2. The device interpolation 4.2 reduces the discretization of the signal (figure 2), thereby preparing it for processing in the following blocks. After signal processing unit 4.2 interpolation signal in the unit time delay 5.1, device multiplication 5.2 unit 5, in the device of the decomposition in Fourier series 6.1 unit 6 and to the input of the storage device 7.
In block 5, the signal enters the device time delay 5.1 and on the device multiplication 5.2 performing the multiplication of the instantaneous values and shifted in time by an interval τ. Next, using the integrator 5.3 is averaged, after which the resulting signal through the interface unit 5.4 gets on the output unit 5 (figure 3).
The calculation formula for the correlation function:
where: τ - TimeShift peremezhaemyh instantaneous values provided by the time delay device 5.1;
t - time tests.
In block 6, the signal enters the device 6.1 translation in the Fourier series, then the device squaring 6.2 is squaring and normalization given averaging interval So using interfaces 6.3 the generated signal (figure 4) is supplied to the output unit 6.
The power spectrum describes the frequency distribution, and it can be determined in accordance with the following formula:
whereAll results are stored in the storage device 7. After completion of the test storage device 7 is turned off. The average RMS error due to the finiteness of the volume of the sample data about the instantaneous values of the process X(t), estimated using correlations: when averaged over time T averaged over the population.
Thus, in the storage device 7 records the sequence of packets representing the numerical values of the three indicators signal after processing by a decryption unit discrete signal and its interpolation (figure 2), the correlation function (figure 3) and power spectrum (figure 4).
Correlation function calculates the optimal correction that must be entered.
Frequency distribution describes the distribution of harmonics, thereby showing the most dominant harmonics, which allows to conclude on measures to eliminate noise showing on the faulty mechanism tests.
Thus, the definition of angular oscillations of the vehicle by continuous control changes its angular movements relative to the longitudinal axis of the vehicle depending on the time instant comprehension and calculation of the correlation function and power spectrum allows to extend the functionality and improve the measurement accuracy due to signal processing and calculation of correction factors.
Device for determining the angular oscillations of the wheels of the vehicle containing the test stand,
connected to a recording device comprising the storage device and the signal reception according to the angle from time containing photodetector blocks, forming a rectangular pulse, the trigger and the logical elements, and the inputs of signal reception according to the angle of deviation from the time are the inputs of the recording device, characterized in that the recording device additionally introduced a decryption unit discrete signal and interpolation, containing connected in series decoding unit and the unit interpolation, the block correlation, containing serially connected unit delay, multiplied device, integrator and interface unit and the computing unit of the power spectrum, containing serial connected device decomposition in Fourier series, the device squaring and interface unit, and outputs the signal reception according to the angle of deviation from the time connected to the decoding unit, and the output of the interpolation is the output of a decryption unit discrete signal and its interpolation and connected to the input of the storage device, the input device time delay and multiplied device block correlation and the device performing the decomposition in Fourier series the unit for computing the power spectrum, the outputs of the coupler block correlation and calculation of the power spectrum are connected with inputs of the storage device.,