EP3928061A1 - Dispositif de mesure de châssis et procédé de mesure de châssis - Google Patents

Dispositif de mesure de châssis et procédé de mesure de châssis

Info

Publication number
EP3928061A1
EP3928061A1 EP20719927.4A EP20719927A EP3928061A1 EP 3928061 A1 EP3928061 A1 EP 3928061A1 EP 20719927 A EP20719927 A EP 20719927A EP 3928061 A1 EP3928061 A1 EP 3928061A1
Authority
EP
European Patent Office
Prior art keywords
wheel
vehicle
measurement
laser light
measured
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20719927.4A
Other languages
German (de)
English (en)
Inventor
Fernando Arruda
Matthias PLANTE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP3928061A1 publication Critical patent/EP3928061A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
    • G01B11/275—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing wheel alignment
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
    • G01B11/275—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing wheel alignment
    • G01B11/2755—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing wheel alignment using photoelectric detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B2210/00—Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
    • G01B2210/10—Wheel alignment
    • G01B2210/14—One or more cameras or other optical devices capable of acquiring a two-dimensional image
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B2210/00—Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
    • G01B2210/10—Wheel alignment
    • G01B2210/14—One or more cameras or other optical devices capable of acquiring a two-dimensional image
    • G01B2210/143—One or more cameras on each side of a vehicle in the main embodiment
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B2210/00—Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
    • G01B2210/10—Wheel alignment
    • G01B2210/14—One or more cameras or other optical devices capable of acquiring a two-dimensional image
    • G01B2210/146—Two or more cameras imaging the same area
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B2210/00—Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
    • G01B2210/10—Wheel alignment
    • G01B2210/16—Active or passive device attached to the chassis of a vehicle
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B2210/00—Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
    • G01B2210/10—Wheel alignment
    • G01B2210/30—Reference markings, reflector, scale or other passive device
    • G01B2210/303—Reference markings, reflector, scale or other passive device fixed to the ground or to the measuring station

Definitions

  • the invention relates to a method and a device for wheel alignment in accordance with the preambles of claim 1 and claim 11.
  • the correct alignment of the individual wheels of a vehicle has a decisive influence on the driving and wear behavior of the vehicle. For this reason, the correct alignment of the wheels is specified by the vehicle manufacturer in the form of target values.
  • the vehicle manufacturer usually specifies the alignment variables of individual toe angle, total toe angle, toe difference angle, camber angle and caster angle as setpoint values.
  • the vehicle manufacturer usually specifies the alignment variables individual toe angle, total toe angle and camber angle as setpoint values.
  • the total toe angle of a vehicle axle is determined from the difference between the front and rear distance between the wheels of the respective axle, measured on the rim horns (outer diameter of the wheel), wheel hubs, wheel hub mounts or setup wheel at the level of the horizontal wheel center plane.
  • the toe angle here generally refers to the angle between the longitudinal center axis of the vehicle projected onto the roadway and the line of intersection between the wheel center plane and the roadway plane.
  • Bodywork specialists often have to take the vehicle to a workshop equipped with devices for measuring and correcting the alignment of the vehicle's wheels after repairing the damage, as the wheels of an accident-damaged vehicle usually lose their alignment.
  • a method for measuring a chassis on a vehicle comprising the following steps: arranging the vehicle on rollers, attaching light beam projection means or camera devices to each wheel of the vehicle, the light beams in a line Send in opposite directions and approximately perpendicular and at the same height to the axis of rotation of the wheel, arrange interacting scales at different points in the longitudinal direction of the vehicle and in the projection path of the light beams or camera devices, activate the light beam projection device or camera devices and turn the wheel on rollers so that the opposing beams or camera devices each enable a reading on the corresponding cooperation scales, and use of the collective readings on these scales to calculate the toe-in or toe-out wheel angle after compensating for the deviation of the light beam from d he perpendicular to the axis of rotation of the wheel.
  • Lichtstrahligenionsmit tel or camera devices for measuring the wheel angle are permanently mounted on the wheels of the same axis of the vehicle so that they can be rotated with the wheels, where the light rays or the camera axis are approximately perpendicular and at the same height to the axis of rotation of the Wheel stand. There are means for rotating the wheels by 180 degrees in the form of roller blocks on which the vehicle must be placed for the measurement.
  • At least two pairs of scales are provided at different positions in the longitudinal direction of the vehicle in front of and behind the vehicle for the projected light beams to provide a double set of readings for determining the differences between the front and rear readings at a first wheel position and at a second wheel position one Rotation of the wheel through 180 degrees, the readings from the two positions being used to determine the degree of deviation of the light rays from normality to the axis of rotation of the wheel, and this deviation being used to determine the toe-in To correct one or toe-off wheel angle that compensates for the deviation of the light beam from the perpendicular to the axis of rotation of the wheel.
  • the scales are arranged above and perpendicular to the driving plane directly opposite one another.
  • a vehicle must be stored on anti-friction plates or pairs of rollers in order to be able to measure, which requires a specially designed measuring station that has appropriate devices.
  • brackets for the light beam projection device or camera devices are to be attached at least in pairs to the wheels of an axle in such a way that they can rotate freely around the wheel axle. It therefore requires at least two holding devices with light beam projection devices or camera devices that are rotatably attached to the wheel, that is to say they must be freely floating. The rotation is necessary to enable multiple readings on the scales in different wheel orientations in order to be able to determine an average value of the reading.
  • the scales in front of and behind the vehicle must be positioned approximately at the level of the wheel axles so that they can be hit or read with the light beam projection device or camera device.
  • a system for measuring the wheel settings of a vehicle is known from the document WO9219932A1, which system comprises a bracket which is attached to the outside of each individual wheel or wheel pair of the vehicle.
  • the holder is provided with a pin which coincides with the axis of rotation of a respective wheel, a laser projector being attached to the pin.
  • This should alternately illuminate at least two measuring scales at the respective ends of the vehicle, which extend transversely to the longitudinal axis of the vehicle.
  • Each measuring scale consists of an optoelectronic detector unit that provides information on the exact position of the incident light beam on the measuring scale.
  • a stand is arranged at right angles to the longitudinal center line of the vehicle at the respective ends of the vehicle.
  • a pair of continuous, self-centering measuring rods are attached to each stand, which can assume different lateral positions in relation to the vehicle center line, these lateral positions depending on the vehicle width.
  • Lateral measuring scales are attached to the ends of the respective measuring rods, which are far enough away from the vehicle to allow a clear view from scale to scale to the outside from the outside of the wheels.
  • a laser projector is pivotably mounted on the pin on the bracket and can be rotated on the pin in order to display each measuring scale alternately
  • the axis of rotation of the wheel is perpendicular to the vehicle center line.
  • the measuring scales must sen are placed at right angles to the axis of rotation of the wheel on measuring rods, which in turn are to be attached to a stand that is to be arranged at both ends in relation to the longitudinal center line of the vehicle. Since the measured values of the front and rear scales are compared with one another to measure the axis of rotation of the wheel and their deviations from the same value result in the positive or negative track value, these scales must be precisely aligned in order to have the same value for a wheel axis of rotation parallel to the vehicle center line to be shown on the scales.
  • the laser projector is pivotably mounted on the pin on the holder and must be rotated on the pin in order to illuminate each measuring scale alternately and to generate measured values.Therefore, the same sources of error result here as described above due to the rotation process of the laser projector on the holder Wheel.
  • this measuring method is time-consuming.
  • US 2012/0313337 A1 is directed to a correction of the toe angle of wheels which are attached to a rigid rear axle or a trailer axle housing in order to reduce abrasive wear on these axle wheels.
  • a laser alignment system is used to align both the front wheels and the wheels mounted on an axle that has a fixed axle housing in which a laser is attached to each vehicle wheel spindle or hub. The lasers are aimed at targets with measuring dials to measure the wheels and bring them into correct alignment.
  • Front and rear laser mounts are attached to a vehicle front and rear wheel spindle or hub for holding a laser.
  • lasers are attached to all four wheels of the vehicle.
  • the front measuring scale is in front of the vehicle and a rear measuring scale is at the rear of the vehicle assembled.
  • Each target has a series of target gradations at which the light beam from the lasers is directed.
  • the front wheels are aligned to the toe angle.
  • this solution primarily uses a laser module assembly system in which a number of adapters can be attached to a mandrel for different vehicles with different wheel configurations. It is a structurally complex method to arrange a laser module firmly and freely floating and at a distance from the wheel on the wheel so that it can rotate with the wheel.
  • the measurement markings are to be positioned in front of and behind the vehicle, and these are to be attached to all, for example, four wheels of the vehicle.
  • the orientation of this disclosure is limited to an application on rigid-axle constructions.
  • a holding device of a wheel alignment head arrangement on a vehicle wheel which consists of a bracket which is attached to a plate forming a contact area of the vehicle wheel and from which a support extends, at the upper end of which the suspension frame is arranged with a measuring head arrangement.
  • the fastening means for the Achsmesskopfan arrangement include three connected to the base body and contacting the rim or the tire wall of the vehicle wheel Probe. The probes are pressed against the rim or tire flank of the vehicle wheel by a moment of gravity.
  • a vehicle tracking device in which measuring units consisting of a horizontal and a vertical measuring plate are attached to the wheels of the front and rear axles. Measurement points are then determined between the wheels with distance meters. In this way, two measurement points are created in front of and behind a tire for each wheel axle, from which the track alignment of the wheels is determined. This is a method of track measurement that one is not is likely to have insignificant measurement errors and is therefore only able to deliver unsatisfactory exact results.
  • the disclosure DE 10 2006 026 513 B4 in turn shows a device for fastening an axle measuring head arrangement to a vehicle wheel, which, in contrast to the aforementioned publication, provides for the bracing on the vehicle wheel itself.
  • a laser beam source is clamped to a wheel of a vehicle to be measured using holding arms.
  • Track measuring device which provides a tensioning of a measuring element on the side of the vehicle frame, a columnar section running vertically on this bracket and measuring the distance to the opposite wheel of the same axis. The measurement takes place above the wheel plane and the vehicle body by means of an optical distance measurement.
  • WO 2018/046222 A1 discloses a wheel adapter, with at least two arms being provided here for fastening a measuring element to the vehicle wheel, with which the holder can be fastened to the vehicle wheel.
  • some specialist workshops acquire such instruments and assemblies for wheel alignment and correction. It is obvious, however, that such a decision would involve significant expense in purchasing the necessary in- instruments and also requires a separate room to place these instruments within a workshop.
  • Known wheel alignment devices can usually only be used for certain vehicle categories (cars, trucks, etc.) or concepts (sedans, SUVs, etc.).
  • the aim of the present invention is to provide a method and a device for wheel alignment which solve the problems which are encountered in the normal working practice of body shops.
  • Another object of the present invention is to provide a device for wheel alignment that is lightweight and compact and thus does not require any extensions to be permanently installed, can be used in a mobile manner and can be transported in a suitcase, for example. Ideally, it should also be able to be carried as hand luggage as standard in air traffic, so it should not have dimensions larger than 55 cm by 40 cm by 20 cm.
  • Another object of the present invention is to provide a method and a device for measuring the chassis, which can be used easily, quickly and independently of the respective vehicle concept with a high level of measurement precision and accuracy while still having low operating costs and high operating flexibility.
  • the device according to the invention for wheel alignment measurement is claimed in claim 11, with the subclaims 12 to 20 comprising advantageous developments of this device for wheel alignment.
  • the subject of the invention is the corresponding Ver drive to make a track measurement.
  • a laser light source with a fastening device is to be attached to the outside of the vehicle wheel, with laser projection taking place in order to generate an intersection with a measurement mark. These intersection points must be read off in order to determine the distance between the intersection points.
  • the vehicle's longitudinal center plane or the geometric travel axis is computationally determined, as well as the angle of the individual wheels to this vehicle longitudinal center plane or geometric travel axis, whereby the individual lanes are determined computationally.
  • the basic idea of the inventive solution is to place a laser light source on the side of the vehicle wheels, wheel hubs or setup wheels in order to generate laser markings on the road surface next to a vehicle or on a plane parallel to it, which are on in front of and behind the vehicle arranged measurement markings project intersection points at the same time, which provide information about the distances between the intersection points and read them off. Because of the- These distance measurements between the intersection points at the measurement markings can be calculated mathematically in relation to the vehicle longitudinal center plane or the geometric driving axis of the vehicle, the angle of the individual wheels to the vehicle longitudinal center plane or the geometric driving axis.
  • the toe values are determined here as the difference between the front and rear scale values using trigonometric functions.
  • a major improvement in the sense of a simplified measurement process has been found to be the use of a laser as a light source, which, supported on the vehicle wheel, the wheel hub or the setup wheel, projects a line parallel to the vehicle grade center plane on the road surface.
  • a laser as a light source
  • the wheel hub or the setup wheel projects a line parallel to the vehicle grade center plane on the road surface.
  • an intersection point can be read from measurement markings placed in front of and behind the vehicle and arranged transversely to the vehicle longitudinal center plane.
  • the method according to the invention has the advantage of leaning the measuring head against the wheel without complex attachment by a mobile device, which is also made possible by the fact that a rotation is not supposed to take place, since the one-time projection of the laser line onto the vehicle stand level already has all the required measurement markings in can be generated and read in a single process step. In this way, the required distance measurement between the determined intersection points and thus also the calculation in relation to the vehicle longitudinal center plane can be carried out significantly faster and in a simplified manner.
  • laser light of different electromagnetic spectrum and / or different frequency modulation is generated by the laser light source of the measuring head device, for example through the use of filters, the white laser light in different Create or convert colors, use of free electron lasers, lasers that work in whisper gallery mode (WGM) and other known and still in development technical laser modulation options.
  • WGM whisper gallery mode
  • These measurement markings are recorded by a camera-supported measurement value recording device and the electromagnetic marks are automatically defined by them in accordance with the recorded laser light Spectrum to a wheel assigned to this spectrum and / or an axle of the vehicle assigned to a data processing system. It is thus possible that the unambiguous assignment of the measured values of the different wheels takes place via the laser light of different electromagnetic spectrum and in this way on the one hand measurement errors can be reduced and on the other hand the measurement can be simplified and accelerated.
  • measuring markings in the form of measuring rods which, for example, have a scaling that allows easy reading of the intersection points on these measuring rods and also a determination of the distance.
  • the reading of the measurement markings and the intersection points with the laser markings produced thereupon takes place according to the method supported with a handheld measuring device or via a special software application using a device for electronic data processing (e.g. computer, smartphone, or the like).
  • a device for electronic data processing e.g. computer, smartphone, or the like.
  • the measurement marking can be made in different designs. Alternatives are measuring tapes or pull-out measuring tapes as well as folding rules ("folding rules").
  • a measuring mark can also be permanently applied to a surface in a workshop, for example in the form of a coating that is applied as a direct application of paint or as a glued or applied film
  • the main thing is that the reading of these measurement markings can be automated. This can also be done with a coded measuring scale that cannot be read directly by the user but only with a reading device. In the simplest case, the color-coded scale is direct read by the user and entered in the handheld device.
  • the fastening device for arranging a laser light source on the vehicle wheel, the wheel hub or the setup wheel can, according to the invention, consist of a horizontal stand that can be placed freely on the vehicle stand level and that interacts with a wheel contact body supported approximately vertically on the vehicle wheel, with at least one support arm the wheel contact body connects to the base and so a gravity torque leads to the fact that the wheel contact body is leaned against the rim of the vehicle wheel. It is therefore made use of the inclination with which the support arm applies the Radanliegekör to the rim. In this way it is ensured that no measurement errors occur due to improper tensioning of the fastening device on a vehicle wheel or on its rim.
  • Fastening means in the usual form, for example in the form of clamping elements, are not required here.
  • the wheel contact body can also be advantageous here for the wheel contact body to have arms which are designed to be adjustable in length and which can be used to provide support on the rim or the wheel flanks by means of support bodies.
  • the support bodies can be adjusted via the length-adjustable arms so that they come to rest at suitable points on the rim or the wheel flank.
  • an arrangement can be performed directly and in parallel at a specific point on a setup wheel or similar.
  • the measurement inaccuracy known from current solutions in the toe angle measurement is practically completely eliminated by the innovative solutions of the present new invention. Any remaining measurement inaccuracy is therefore always caused by a user error if the device is in perfect condition, but never caused by the device or the process.
  • the wheel contact body is attached to the respective wheel using bracing. The tension leads to a measurement inaccuracy that cannot be neglected.
  • the wheel contact body is attached to the respective wheel without any tension. By dispensing with tension, the measurement inaccuracy is completely eliminated.
  • a separate wheel contact body is used for each wheel of the vehicle. In the present invention, however, only one wheel contact body is used overall.
  • This wheel contact body is used in sequence on all wheels of the vehicle. Since the wheel contact body is attached to both wheels of an axis rotated by 180 ° (around the z-axis), any inaccuracies caused by the wheel contact body compensate each other on the left and right wheel of an axis. The corresponding measurement inaccuracy is thus completely eliminated.
  • the geometric travel axis is unacceptably neglected when determining the toe angle. Instead, these solutions refer to the vehicle's median longitudinal plane.
  • the measured toe angle is corrected under consideration consideration of the mathematically precisely calculated geometric travel axis:
  • the longitudinal axis of the vehicle The longitudinal axis of the vehicle.
  • a method for automated reading by means of a camera arranged on the vehicle roof or at another position in the room is also advantageous here.
  • a link between a camera and its electronic control system and the laser projectors attached to the vehicle wheel is provided, advantageously projecting on all wheels at the same time.
  • the camera is able to recognize and assign the projection per wheel. This works ideally by switching on different laser light colors and / or wavelengths of the laser light per wheel, and / or by briefly switching the laser light source on and off per wheel, which is temporally recognized by the camera, so that the reading device the intersection points can assign the respective wheel and axle to the measurement markings and record all wheels in one reading process.
  • This solution has the advantage that the reading can take place automatically without the involvement of the user.
  • the laser light sources are arranged at the same time on all 4 wheels so that the cutting lines of all wheels can be read simultaneously with the camera and a device for electronic data processing (e.g. Computer, smartphone, etc.), which calculates the track position accordingly.
  • a device for electronic data processing e.g. Computer, smartphone, etc.
  • 2 laser light sources with green and blue light can be used at the same time, with green being used for the front axle and blue for the rear axle.
  • the same procedure takes place on the left and right of the vehicle.
  • This is also possible in combination with an automatic camera detection of the measurement markings, whereby even wavelengths in the infrared range can be used that are invisible to the human eye.
  • the laser source briefly switches on and off for each wheel, so that the reading device can assign the intersection points at the measurement markings to the respective wheel and axle and record all wheels in one reading process.
  • This camera-like reading device expediently has a holding and alignment device with which it can be arranged, for example, on the vehicle roof. In this way, the device can read out all 4 intersection points in front of and behind the vehicle in one operation.
  • This device can be designed as a kind of small tripod in order to be able to adjust the height and angle of the camera in such a way that both measurement marks are recorded simultaneously.
  • scalings are arranged on the measurement markings. It is provided here to arrange laser light sources with different electromagnetic spectra on the front and rear axles, whereby the camera-like reading device can use these different electromagnetic spectra of the laser light to recognize whether the front or rear axis is affected. In this way, all measuring points, for the front and rear axles in total at least 8 intersection points on the measuring markings, can be read off in one operation.
  • the electromagnetic spectra of the laser light are at least the areas of visible light as well as ultraviolet and infrared laser light.
  • each vehicle wheel is assigned a ramp-like wheel support in which pairs of rollers are rotatably supported.
  • the bearings of the roller pairs are raised in a housing frame so that they can be freely rotated and the vehicle rests slightly higher on the wheel support.
  • the first step is to place the vehicle on the wheel supports so that the wheels can be rotated freely in order to be able to carry out several measurements without moving the vehicle.
  • the vehicle can be driven onto this Radstüt ze, whereby the vehicle wheels can be turned during measurement.
  • the aim of this improvement is to also be able to take into account the run-out of the rim when measuring the track position by measuring the vehicle wheels rotated by 90 ° several times. This way, errors can also be calculated out here.
  • an electric motor with electronic control actuates these wheel supports and the pairs of rollers arranged on them.
  • Such a device could in accordance with the invention cooperate with the camera-like Ablesevor direction on the vehicle roof, whereby for example with a signal linkage is achieved that 4 measurements, each with vehicle wheels rotated by 90 ° further, automatically take place via the reading device located on the vehicle roof and thus the runout can also be included in the calculation.
  • other positions of the camera-like reading device are also possible, for example on the ceiling or wall of a workshop.
  • the device for wheel alignment also has an inclination angle sensor for detecting the camber angle. After positioning and aligning the device on the wheel to be measured, the camber angle can be read and fed to a data processing device, for example. This additional sensor can also be used to measure the caster angle, which will be explained in more detail below.
  • the device is advantageously designed as a compact set comprising all device components, with all device components in one in flight mobile containers approved as hand luggage are included.
  • the device also comprises a template for measuring the caster angle, which is positioned next to the wheel to be measured and on which the projected laser markings can be read in defined turning positions of the wheel to be measured.
  • this template for caster angle measurement has at least markings that enable the template to be positioned by the projected laser marking in the straight ahead position of the wheel to be measured, and the wheel position at a 10 ° left turn and a 10 ° to measure the camber angle on the inclination angle meter - Specify the right-hand lock of the wheel to be measured. Typically this is 10 °, but it can also be done at a different angle, such as 15 ° or 20 °.
  • the measurement then takes place in such a way that after the measuring device has been positioned, for example on the rim flange of the wheel to be measured, the template for the caster angle measurement when the wheel is in a straight line is positioned by means of a first central marking next to the wheel using the projected laser marking next to this wheel .
  • the steering wheel is turned to the left until the projected laser mark runs parallel to a first 10 ° mark on the template for caster angle measurement that runs to the left.
  • the camber angle when turning to the left of 10 ° is read from the display of the inclinometer and can be entered into a data processing system, for example.
  • the steering wheel is turned to the right until the projected laser marking runs parallel to a second 10 ° marking on the template for measuring the caster angle, which runs to the right.
  • the camber angle of 10 ° when turning to the right is read from the display of the inclinometer and can be used, for example, in a data converter. processing can be entered.
  • the angle can also have a predetermined value that differs from 10 ° and the template can be designed accordingly differently.
  • FIG. 1 shows the arrangement of the holding device on
  • Figure 2 shows the design of the wheel contact body
  • Figure 3 shows the arrangement of the laser projection on a
  • FIG. 4 shows the schematic representation of a camera-assisted measurement of all 4 wheels of a vehicle at 2 measurement markings
  • FIG. 5 shows the wheel support according to the invention with the vehicle wheel attached and a schematic illustration of the possibility of 4 measurement points offset at 90 °
  • Figure 6 shows the arrangement of the wheel contact body in
  • FIG. 1 shows how a wheel contact body 10 is fastened to a vehicle wheel 1 via a support arm 11 from a stand 9 to be placed freely on the vehicle stand. It is clear in the side view that the wheel contact body is securely seated only via a gravitational moment which is introduced into the wheel contact body 10 via the inclination of the support arm 11 10 takes place on vehicle wheel 1.
  • the force arrows shown on the right show how the forces act accordingly.
  • FIG. 2 illustrates the arrangement of the adjustable arms 12 on the wheel contact body 10 and the support body 6 extending from the arms 12, so that a wheel contact body 10 that can be adjusted to the respective vehicle wheel 1 or its rim is present. Together with the basic structure of the fastening device 2, this supports the accuracy and the hold of the measuring device on the vehicle wheel 1.
  • FIG. 1 A simple first illustration of the principle of measurement is shown in FIG.
  • the track of four vehicle wheels (la, lb, lc and ld) of a vehicle 21 is designed to be above average for the sake of simplicity.
  • the measurement markings 4a and 4b are arranged approximately parallel to the front and rear sides of the vehicle, with no exact alignment being required.
  • This basic arrangement of the measuring markings makes it possible, on the one hand, to use the laser projection 3 'to move the vehicle longitudinal center plane from the intersection points 5a and 5b arising on the measuring markings 4a and 4b.
  • the design shown is a solution in which a measuring head device with laser light source 3 forms a laser surface that projects the laser line 6 'indicated by dashed lines onto the road surface, which is in front of and behind the vehicle with the measurement markings 4a and 4a 4b cuts. For the sake of simplicity, no scalings 13 are drawn in here on the measurement markings 4a and 4b.
  • FIG. 4 The more complex solution with an automated measurement can be seen in the following FIG. 4, in which a camera-like reading device 14 is shown centrally on the vehicle. In principle, other positions on or next to a vehicle can also be used for this purpose. From this camera-like reading device 14 go at a certain angle indicated on the front and back of the Able solutions that are at a certain angle, in the example stick representation less than 90 ° to be able to access the measurement markings 4.
  • the measuring markings 4a and 4b are located in front of and behind the vehicle as in the previous drawing, it being indicated schematically that different intersection points, namely four intersection points 5a, 9a each, are indicated when measuring all wheels , 5c and 9c on the front measurement mark 4a and four further intersection points 5b, 9b, 5d and 9d on the rear measurement mark 4b are generated by the laser projections and these intersection points on the measurement markings 4a and 4b are all recorded simultaneously by the camera-like reading device 14 can .
  • intersections 9c and 9d To be able to assign intersections 9c and 9d to the respective vehicle wheel ld. This is shown in the drawing in such a way that the laser projections 3 'with different laser frequencies are shown with differently dashed lines 19, and the laser projections 3' 'with different laser frequencies with different dashed lines 20. The points of intersection of these deviating laser frequency markings are represented by different star shapes on the measurement markings 4a and 4b.
  • FIG. 4 shows, through the arrangement of the intersection points, how the deviations relevant for the lane measurement can be read.
  • the intersection points and their distances from one another are different at measurement markings 4a and 4b in front of and behind the vehicle, with the route or distance deviations of these intersection points that can be measured in this way can be used for computational determination.
  • Points of intersection with the measuring marks 4a and 4b can thus can also be fed to an evaluation unit, for example on a device for electronic data processing (eg computer, smartphone, or the like).
  • a device for electronic data processing eg computer, smartphone, or the like.
  • any computer for data processing i.e. PCs, smartphones, tablets, and future data processing devices, is suitable for this.
  • the points of intersection 5a, 5b, 5c, 5d, 9a, 9b, 9c and 9d with the measurement markings 4a and 4b can thus also be fed to an evaluation unit, for example on a device for electronic data processing (e.g. computer, smartphone, etc.) .
  • a device for electronic data processing e.g. computer, smartphone, etc.
  • any computer for data processing i.e. PC, smartphones, tablets and future data processing devices is suitable for this.
  • a central data server application which is why the measurement data are then transferred to this central calculation database, for example by a smartphone, and then sent back to the smartphone, for example, after the calculation.
  • different ways are possible here, how and with which devices the actual computational calculation of the track position based on the measured data can finally be carried out.
  • the following drawing 5 shows a wheel support 15 with attached vehicle wheel 1.
  • There are pairs of rollers 16 he can be recognized on which a vehicle wheel 1 rests and is freely rotatable bar.
  • FIG. 6 shows a wheel contact body 10 on the vehicle wheel 1 in a side view.
  • the wheel contact body 10 has a three-point mounting on the vehicle wheel 1, which is also technically advantageous in order to ensure that the wheel contact body 10 is securely seated on the vehicle wheel 1. Since a level is always divided by at least 3 Points is clearly defined, this optimized solution ensures that the wheel contact body (10) always assumes an orientation parallel to the wheel center plane.
  • a spirit level attached to the measuring head device with laser light source (3) it is ensured that the two upper support bodies 6a and 6b are always on a parallel line 18 with the vehicle stand level 22. By placing it on the metallic wheel instead of the flexible tire, measurement inaccuracies due to elasticity are also eliminated.
  • the aim of the present invention is to provide the user with a fully integrated solution (device & method) for wheel alignment, which combines the advantages of known solutions and at the same time eliminates their disadvantages.
  • the invention enables an extremely user-friendly wheel alignment of various vehicle categories that have wheels and axles, such as Cars, trucks, agricultural machinery, construction machinery, commercial vehicles, trailers, airplanes etc ..
  • the invention is aimed at professional users in the fields of vehicle development, vehicle testing, vehicle maintenance, vehicle repair, vehicle sales, vehicle rental, vehicle fleet management and professional motorsport.
  • the invention is also aimed particularly at private users in the fields of young-timer hobby, old-timer hobby, vehicle restoration, vehicle modification (tuning, amateur motor sports and amateur aviation.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

L'invention concerne un dispositif de mesure de châssis. L'invention vise à fournir un dispositif servant à définir l'orientation des roues d'un véhicule à moteur, qui peut être utilisé par des carrosseries sans occasionner des coûts excessifs pour les carrosseries, qui est compact et ne requiert ainsi aucun élément rapporté à installer durablement et qui peut être utilisé en toute simplicité et présente de faibles coûts de fonctionnement et une flexibilité de fonctionnement élevée. L'invention propose à cet effet un dispositif de tête de mesure bloqué de manière amovible sur la roue de véhicule à mesurer. Les repères de mesure sont positionnés de manière parallèle sur le côté avant et arrière du véhicule ou sur le plan d'appui du véhicule. Les marquages peuvent présenter des échelles, des chiffres, des lettres ou des codes couleurs. Après l'agencement du dispositif de fixation et le positionnement des repères de mesure, la source de lumière laser est activée et une surface est projetée dans l'espace. La longueur desdites lignes de lumière laser génère dans le même temps au moins des points d'intersection avec les repères de mesure, dont les points d'intersection sont détectés et utilisés de manière arithmétique en tant qu'écartement de voie afin de définir les données de carrossage, de chasse, d'écartement et l'axe longitudinal virtuel du véhicule. Différents spectres électromagnétiques sont détectés pour chaque roue à mesurer par un dispositif de détection de valeurs de mesure assisté par une caméra et sont amenés à un système de traitement de données.
EP20719927.4A 2019-02-21 2020-02-21 Dispositif de mesure de châssis et procédé de mesure de châssis Withdrawn EP3928061A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019104466.9A DE102019104466A1 (de) 2019-02-21 2019-02-21 Vorrichtung zur Kraftfahrzeug-Spurmessung und Verfahren zur Kraftfahrzeug-Spurmessung
PCT/DE2020/100128 WO2020169155A1 (fr) 2019-02-21 2020-02-21 Dispositif de mesure de châssis et procédé de mesure de châssis

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EP3928061A1 true EP3928061A1 (fr) 2021-12-29

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US (1) US20220136824A1 (fr)
EP (1) EP3928061A1 (fr)
DE (1) DE102019104466A1 (fr)
WO (1) WO2020169155A1 (fr)

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DE102020210985A1 (de) * 2020-08-31 2022-03-03 AuE Kassel GmbH Vorrichtung zum Vermessen der Geometrie einer Radachse eines Kraftfahrzeuges
CN113008165B (zh) * 2021-02-05 2023-08-22 深圳市易检车服软件开发有限公司 车辆的车轮定位方法、终端设备及系统
CN113432555B (zh) * 2021-06-11 2023-12-12 西安外事学院 一种汽车主销内倾角的测量方法
DE102022000523A1 (de) 2022-02-11 2023-08-17 Tibor Meszlényi Vorrichtung und ein Verfahren zum Bestimmen der Radgeometrie eines Rades, insbesondere eines Rades eines Kraftfahrzeugs.
CN116495026B (zh) * 2023-06-19 2023-08-29 成都铁安科技有限责任公司 一种用于调节轮对损伤检测杆的方法及其系统
US11989982B1 (en) * 2023-08-28 2024-05-21 Monliz Llc Systems and methods for vehicle tuning and calibration

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DE102019104466A1 (de) 2020-08-27
WO2020169155A4 (fr) 2020-11-05
US20220136824A1 (en) 2022-05-05
WO2020169155A1 (fr) 2020-08-27

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