Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
  • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
  • G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
  • G01B21/26—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant 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
  • G01B2210/00—Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
  • G01B2210/10—Wheel alignment
  • G01B2210/18—Specially developed for using with motorbikes or other two-wheeled vehicles

Definitions

• the invention relates to an alignment control method of two-wheeled vehicle.
• the invention also relates to a two-wheeled vehicle alignment control device embodying a two-wheeled vehicle alignment control method according to the invention.
• US 4,096,636 discloses a motorcycle wheel alignment tool. This tool is used to form a contact between two points of each wheel, so as to ensure the alignment of the front and rear wheels.
• the tool comprises a straight bar and possibly spacers intended to compensate for the difference in width between the front wheel tire and the rear wheel tire.
• the device of US Pat. No. 4,096,636 thus makes it possible to perform a wheel alignment adjustment, but does not make it possible to measure a misalignment of a two-wheeled vehicle frame, for example due to an accident.
• a first object of the invention is to provide a new method and a new control device for identifying deformations of the frame or misalignment of the two wheels, due for example to an accident.
• a second object of the invention is to allow a rapid and continuous measurement of the deformations of a two-wheeled vehicle, in particular by performing a compensation of the sail of each front or rear wheel.
• the subject of the invention is a two-wheeled vehicle alignment control method, comprising the following steps:
• a predetermined time interval is expected corresponding to the natural alignment of the two-wheeled vehicle before making measurements representative of the position of the wheel driven in rotation.
• the steps of the method on the invention are carried out on the front wheel, then the steps of the method according to the invention on the rear wheel are repeated.
• the invention also relates to a two-wheeled vehicle alignment control device comprising:
• a wheel of the vehicle in a bench, for example a chassis dynamometer
• delay means allow the rotation drive and the natural alignment of a two-wheeled vehicle before acquiring measurements relating to the wheel driven in rotation.
• the dynamometer can be a roller brake tester.
• the dynamometer can be a motorized speedometer training bench.
• at least one front or rear wheel holding means of a two-wheeled vehicle comprises a fixed position jaw and a sliding jaw capable of gripping a two-wheeled vehicle wheel in a predetermined fixed position.
• the device comprises two front wheel support means and rear wheel respectively disposed on either side of a roller bank.
• means performing non-contact distance measurements for example rangefinders, are arranged on either side of the rollers of the dynamometer.
• Figure 1 schematically shows a top view of a two-wheeled vehicle to be controlled using a method according to the invention.
• Figure 2 schematically shows a top view of a two-wheeled vehicle alignment control device according to the invention.
• Figure 3 schematically shows the two-wheeled vehicle alignment control device of Figure 2 being calibrated.
• Figure 4 schematically shows a top view of a device according to the invention applied to the alignment control of the front wheel of a two-wheeled vehicle.
• Figure 5 schematically shows a top view of a device according to the invention applied to the alignment control of the rear wheel of a two-wheeled vehicle.
• a two-wheeled vehicle comprises a front wheel 1 and a rear wheel 2 mounted on a frame 3 carrying a handlebar 4 and a saddle 5.
• the two-wheeled vehicle 1, 2 has a deformation 3a of the frame 3.
• a device according to the invention has a fixed front jaw 8 and a fixed rear jaw 9 intended to cooperate respectively with a sliding jaw before 10 and a rear sliding jaw 11. All of the aforementioned elements 8 to 11 is disposed on either side of a drive train 12 with rollers 13a, 13b.
• the drive train 12 with rollers 13a, 13b may advantageously be constituted by a roller brake bench, although the invention is not limited to this embodiment.
• the drive train 12 with rollers 13a, 13b can also, without departing from the scope of the present invention, be constituted by a motorized speedometer type bench.
• the rangefinders 14a, 14b are intended to measure the distance between a reference position and a left or right tire edge of the wheel driven by the drive train 12 with rollers 13a, 13b.
• the rangefinders 14a, 14b may be constituted by any non-contact measuring systems, such as, for example, ultrasonic sensors, laser rangefinders, three-dimensional measurement systems based on matrix cameras, three-dimensional measurement systems based on cameras. linear, or any other equivalent system.
• the calibration of a device according to the invention is carried out using a straight bar 15 of predetermined size and width.
• the straight bar 15 is clamped between the front jaws 8 and 10 and the rear jaws 9 and 11, so as to define an alignment of the front and rear holding systems.
• the alignment of the front and rear holding systems makes it possible to carry out a left reference measurement and a right reference measurement and thus to define the neutral position of the mean axis or of the zero reference axis of the straight bar. .
• each rangefinder 14a or 14b After definition and calibration of the zero reference axis corresponding to the mean axis of the straight bar 15, it is possible to carry out a gain calibration of each rangefinder 14a or 14b.
• a shim of known thickness can be applied against the straight bar 15, so as to adjust the gain of the left rangefinder 14a, then the right rangefinder 14b, respectively.
• the front wheel 1 of a two-wheeled vehicle is mounted and positioned in the brake bench 12, while the rear wheel 2 is held in position by the jaw 11 which applies the rear wheel 2 against the jaw fixed 9 of the rear holding system.
• the front wheel 1 After having positioned the two-wheeled vehicle, the front wheel 1 is rotated by means of the rollers 13a, 13b and is waited for a few seconds, corresponding to a time interval. predetermined permitting the natural alignment of the two-wheeled vehicle.
• the front wheel 1 is held in position by the sliding jaw 10 which applies the front wheel 1 against the fixed jaw 8.
• the rear wheel 2 is placed in position in the drive train 12 with rollers 13a, 13b. The rear wheel 2 is then rotated by means of the rollers 13a, 13b.
• a predetermined time interval corresponding to a few seconds is expected to allow the stabilization of the rotation of the rear wheel 2 and the natural alignment of the two-wheeled vehicle.
• the left and right distance measurements provided by the rangefinders 14a, 14b are then acquired over several turns of the rear wheel 2.
• Calculations or processing of signals delivered by the 14a and 14a right-hand rangefinders are then carried out at a computer control center or a measurement processing center, not shown, to determine the position of the median plane of the rear wheel 2.
• the width of a tire corresponds to the difference of the distance values delivered by the rangefinder 14a, 14b.
• the position of the median plane of a tire corresponds to the half sum of the distance measurements delivered by the rangefinders 14a, 14b.
• the difference in the positions of the median planes of the front and rear tires corresponds to a possible defect of alignment of the two-wheeled vehicle frame.
• the invention thus makes it possible to determine quickly and reliably, taking into account the necessary compensation of the front and rear wheels, the determination of a misalignment or deformation of a two-person vehicle frame. wheels.
• the device according to the invention can be equipped with a mechanical means whose position is invariably fixed relative to the roller bench, which avoids performing a prior calibration.
• Such a mechanical means may comprise a not shown V-shaped trough, in which a wheel naturally centers in a fixed position.
• the dynamometer is not necessarily motorized, in which case the rotation of the wheel placed in the bench comes from the drive by the engine of the vehicle.
• the dynamometer is a non-motorized speedometer, it is the motor of the vehicle that drives the corresponding wheel, usually the rear wheel.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Length Measuring Devices With Unspecified Measuring Means (AREA)
• A Measuring Device Byusing Mechanical Method (AREA)

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Citations (2)

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• 2008
  • 2008-05-07 FR FR0802549A patent/FR2930986B1/fr not_active Expired - Fee Related
• 2009
  • 2009-05-05 WO PCT/FR2009/050823 patent/WO2009141557A2/fr not_active Ceased
  • 2009-05-05 EP EP09750038A patent/EP2283312A2/de not_active Withdrawn

Patent Citations (2)

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