• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a system (1) and a method for measuring the torsion angle of the body of a vehicle (V), in particular an automobile. The measuring system (1) according to the invention comprises at least two rigid rectilinear bars (2a, 2b) removably secured to the underbody of the vehicle (V), transversely to the longitudinal direction of the vehicle (V) and spaced apart. on the other, and a measuring device (10, 11) integral with the end of at least one of the two transverse bars (2b) and able to measure the torsion angle of the body from the offset vertical relative between the two ends located on the same side of the two transverse bars (2a, 2b). The invention finds its application in the field of the automotive industry.
    公开号:FR3047558A1
    申请号:FR1650992
    申请日:2016-02-09
    公开日:2017-08-11
    发明作者:Dominique Dignac；Michel Sagnet；Rene Boche；Sebastien Korosz
    申请人:Peugeot Citroen Automobiles SA；
    IPC主号:
    专利说明:

    "SYSTEM AND METHOD FOR MEASURING THE TORSION ANGLE OF THE BODY OF A VEHICLE" [0001] The invention relates to a system and a method for measuring the torsion angle of the body of a vehicle, in particular a vehicle .
    [0002] The static torsion of the body of a vehicle, in particular an automobile, is a paramount parameter of the vibratory comfort of the vehicle, particularly in the field of vibrations. Thus the behavior of the vehicle body subjected to a torsion torque allows the analysis and study of this vibratory comfort. In particular, the measurement of the torsional angle of the body of a vehicle subjected to a torsion torque is an important parameter taken into consideration in the context of this study.
    It is known from DE 102010012178 a system and a method for measuring the torsional stiffness of the body of a vehicle subjected to a torsion torque by a displacement system. This system consists of at least one sensor, for example a laser sensor, positioned near the wheels of the vehicle and participating in the measurement of the torsional rigidity, which furthermore depends on the torsion angle, the torsion moment , the displacement amplitude of the displacement system, and the forces provided by the suspension.
    However, this device does not offer a very reproducible measurement because it is difficult to position the sensors exactly in the same place from one vehicle to another. On the other hand, the method of calculating the torsional stiffness involves many parameters. It is therefore a complicated calculation method with limited precision.
    The present invention aims to overcome the above disadvantages of the prior art.
    To achieve this object, the invention relates to a system for measuring the torsion angle of the body of a vehicle, including an automobile, comprising at least two rigid rigid bars removably secured to the underside of the vehicle, transversely in the longitudinal direction of the vehicle and spaced from one another, and a measuring device secured to the end of at least one of the two transverse bars and able to measure the torsion angle of the body to from the relative vertical offset between the two ends located on the same side of the two transverse bars.
    According to another feature, the two transverse bars are secured to the longitudinal members respectively front and rear of the vehicle body.
    In another feature, the measuring system comprises a longitudinal bar disposed parallel to the longitudinal axis of the vehicle and connected by one end rigidly to one of the two transverse bars and the other end pivotally to the another crossbar relative to the axis of the longitudinal bar.
    In another feature, the longitudinal bar is telescopic so as to adjust the spacing distance between the two transverse bars connected to the ends of the longitudinal bar.
    According to another feature, the measuring system comprises an intermediate transverse bar positioned near the transverse bar pivotally mounted on the longitudinal bar, one end of the intermediate transverse bar being secured to the longitudinal bar so that the vertical offset relative relative measured between the pivotally mounted transverse bar and the intermediate transverse bar is the same as the relative vertical offset between the two transverse bars integral with the underside of the vehicle.
    According to another feature, the measuring device comprises a touch probe device integral with the end of the pivotally mounted transverse bar and whose probe is in contact with the intermediate transverse bar at the end of this last.
    According to another feature, the measuring device comprises at least one laser source secured to the end of one of the two transverse bars and a receiving cell integral with the end of the other transverse bar and adapted to receiving a laser beam emitted by the laser source and a processing unit of the output signal of the cell.
    According to another feature, the measurement system comprises two measuring devices respectively comprising two laser sources integral with the ends of the two transverse bars and two receiving cells integral with the ends of the two transverse bars and able to receive respectively the two laser beams. emitted by the two laser sources and a unit for processing the output signals of the reception cells.
    The invention also relates to a method for measuring the torsion angle of the body of a vehicle, in particular an automobile, using a measuring system as described above, characterized in that it comprises: a step of torsion of the vehicle body, a step of measuring the relative vertical offset between the two ends of the two transverse bars, a step of calculating the torsion angle of the body of the vehicle. vehicle according to the formula a = arctan {L / Η), H being the measured value of the vertical offset and L being the value of the transverse distance separating each measuring device from the longitudinal axis of the vehicle, • a step of normalizing the torsion angle, dividing the value of the angle by the longitudinal distance separating the two transverse bars integral with the sill of the vehicle.
    According to another feature, the step of torsion of the vehicle body is performed via platforms mounted on cylinders on which the vehicle wheels, and imposing vertical deflections diagonally opposite the vehicle wheels.
    The invention will be better understood, and other objects, features, details and advantages thereof will appear more clearly in the explanatory description which follows with reference to the accompanying drawings given solely by way of example illustrating two Embodiments of the invention and in which: - Figure 1 shows a perspective view in transparency of a vehicle under which is mounted a torsion angle measuring system in a first embodiment according to the invention; FIG. 2 is a perspective view of the torsion angle measuring system of FIG. 1 when the measured torsion angle is zero; FIG. 3 represents a perspective view of the system of FIG. 2 when the measured torsion angle is non-zero; FIG. 4 shows a side view of the system of FIG. 3 when the measured torsion angle is non-zero; FIG. 5 shows a perspective view of the torsion angle measuring system in a second embodiment when the measured torsion angle is zero; FIG. 6 represents a perspective view of the system of FIG. 5 when the measured torsion angle is non-zero; Referring to Figures 1 to 4, a first embodiment of the system 1 of the invention for measuring the torsion angle a of the body of a vehicle, including automotive, will be described.
    The measuring system 1 of the torsion angle a of the body comprises two rigid straight bars 2a, 2b fixed to the underside of the vehicle V transversely to its longitudinal direction. The two transverse bars 2a, 2b are spaced from each other and removably secured by fastening means appropriate respectively to the front and rear longitudinal members of the vehicle body V. In addition, the transverse bars 2a, 2b are preferably positioned under the seats respectively front and rear of the vehicle V.
    Preferably, the transverse bars 2a, 2b are metal profiles of square or rectangular cross section. The means for fixing the transverse bars 2a, 2b to the underside of the body include metal tabs 9 protruding near the ends of the transverse bars 2a, 2b perpendicular to the latter towards the underside of the vehicle V, and fixing screws solidarizing the legs at the bottom of the body.
    Thus, the deformations undergone by the body of the vehicle V induce the relative displacement of a transverse bar 2a, 2b with respect to the other, this displacement being quantifiable thanks to a measuring device 10, 11 which will be described. further. In particular, the deformations of the vehicle body V due to a torsion torque induce a relative vertical offset H between the two ends located on the same side of the vehicle V of the two transverse bars 2a, 2b.
    The torsion of the vehicle V body can be performed in a reproducible manner, and is the first step of a method of measuring the torsion angle a of the body of a vehicle V which will be described more far.
    The measuring system 1 of the torsion angle a of the body also comprises a longitudinal bar 3 disposed parallel to the longitudinal axis of the vehicle V, preferably along said longitudinal axis. The longitudinal bar 3 is connected at one end rigidly to one of the two transverse bars 2a, for example by welding. The longitudinal bar 3 is also connected by its other end pivotally to the other transverse bar 2a relative to the axis of the longitudinal bar 3, via a rolling mechanism 6 integral with the transverse bar.
    Preferably the longitudinal bar 3 is telescopic to allow the adjustment of the distance D between the two transverse bars 2a, 2b before attachment to the underside of the vehicle. For this purpose, the longitudinal bar 3 comprises a tubular portion 4, one end of which is fixed rigidly to one of the transverse bars 2b, and a cylindrical portion 5 capable of sliding inside the tubular portion 4, and one end of which is connected to the rolling mechanism 6 included in the other crossbar 2a. In addition, respectively tubular and cylindrical portions 4 each comprise a plurality of holes 7 to allow the relative locking of the two parts 4, 5 relative to each other by the insertion of a pin in two holes 7 in facing relation to the cylindrical portion 5 and the tubular portion 4, respectively.
    To allow the measurement of the relative vertical offset H between the two transverse bars 2a, 2b, the measurement system 1 of the torsion angle a of the body comprises an intermediate transverse bar 8 positioned near the cross bar 2b pivotally mounted on the longitudinal bar 3. One end of the intermediate transverse bar 8 is fixed rigidly on the longitudinal bar 3, in particular on the cylindrical portion 5 thereof when the longitudinal bar 3 is telescopic, so that the relative vertical offset H measured between the pivotally mounted transverse bar 2b and the intermediate transverse bar 8 is the same as the relative vertical offset H existing between the two transverse bars 2a, 2b integral with the underside of the vehicle V.
    To measure this relative vertical offset H, the measuring system 1 according to the invention comprises a contact probing device 10 secured to the end of the pivotally mounted transverse bar 2b on the longitudinal bar 3. The probing device 10 comprises a probe 11 which is in contact with the intermediate transverse bar 8 at the end of the latter.
    From the measurement of this relative vertical offset H, whose value is directly read on the feeler device 10, it is easy to calculate the angle of torsion a according to the formula oc = arctan (L /// ), where L is the transverse distance separating the feeler device 10 from the longitudinal axis of the vehicle, and where H is the relative vertical offset measured by the feeler device 10 between the pivotally mounted transverse bar 2b and the intermediate transverse bar 8 The measurement system 1 of the torsion angle α of the vehicle body V, in this first embodiment, offers a measurement accuracy of the order of +/- 0.03 milliradians.
    Referring to Figures 5 and 6, a second embodiment of the system 1 of the invention for measuring the torsion angle a of the body of a vehicle V, including automotive, will be described.
    Like the first embodiment, the measurement system 1 of the torsion angle α of the vehicle body V comprises two transverse bars 2 relative to the longitudinal direction of the vehicle V, removably attached respectively to the front and rear longitudinal members of the body of the vehicle V. These transverse bars 2 are the same as those 2a, 2b of the first embodiment of the invention, and reference will be made to the text above for a description of the characteristics of these bars transversal 2.
    The difference between the first embodiment and the second embodiment is that the latter has no intermediate transverse bar 8. In addition, the measuring system of the second embodiment may not include a longitudinal bar 3 connecting the two transverse bars 2.
    To allow the measurement of the relative vertical offset H between the two transverse bars 2, the measurement system 1 of the torsion angle α of the body comprises two measuring devices 12, 13 integral ends of the same 2. Each measuring device comprises a source 12 for emitting a laser beam and a cell 13 for receiving the laser beam emitted by the laser source 12. Thus, one of the two laser sources 12 is secured to one end of a first of the two transverse bars 2 and the receiving cell 13 associated with this source 12 is integral with the end of the second transverse bar 2, while the other laser source 12 is secured to the end of the second transverse bar 2 and the receiving cell 13 associated with this other laser source 12 is integral with the end of the first transverse bar 2.
    The electrical output signals respectively of the two receiving cells 13 are sent to a processing unit of these output signals, in order to measure the relative vertical offset H between the two transverse bars 2. This processing unit also allows calculate the torsion angle a of the vehicle body V from this relative vertical offset H measured, according to the formula described above with the first embodiment. The measurement system 1 of the torsion angle α of the body of a vehicle V, in this second embodiment, also offers a measurement accuracy of the order of +/- 0.03 milliradians.
    The method of measuring the torsion angle α of the body of a vehicle V, in particular a vehicle, using a measuring system 1 as described previously in the two embodiments, will now to be described.
    The first step of this method consists in applying a torsion torque to the body of the vehicle V. To do this, the wheels R of the vehicle respectively rest on platforms mounted on cylinders. To generate the torsion, these platforms impose vertical deflections diagonally opposite to the wheels R of the vehicle V. By way of example with reference to FIG. 1, the front right and rear left wheels undergo a clearance of 50 mm upwards relative to at the vehicle V body, while the front left and right rear wheels undergo a clearance of 50 mm down from the body of vehicle V. These deflections are shown in Figure 1 by vertical arrows pointing in the direction the displacement of the corresponding wheel. The forces produced by the deformation of the suspensions induce the torsion of the body of the vehicle V.
    The second step of the method consists in measuring the relative vertical offset H between the two transverse bars 2, 2a, 2b of the measurement system of the torsion angle a, induced by the torsion of the vehicle body V caused in the previous step.
    The third step is to calculate, via a processing unit of the measurement system or manually, the torsion angle α according to the formula described above.
    Finally, the fourth step is a normalization of the torsion angle a, performed manually or via the processing unit. Indeed, the distance D between the two transverse bars 2, 2a, 2b being adjustable, it is necessary to normalize the result by dividing the value of the angle obtained by the distance D between the two transverse bars. The final result is expressed in milliradians per meter (mrad / m).
    The measuring system 1 of the torsion angle a of the body of a vehicle V thus allows the realization of this measurement in a simple manner, and especially in a very reproducible manner given the accuracy of the measurement. Indeed, the torsion angle a of a vehicle body being of the order of milliradian, such measurement accuracy of the order of +/- 0.03 milliradians is ideal to ensure reproducible measurements. This high accuracy is enabled by the small number of parameters involved in the measurement, namely only the relative vertical offset H between the two transverse bars and the transverse distance L between the measuring device 10, 11, 12, 13 and the axis These two parameters themselves being measured very precisely, it is the same for the torsion angle a of the body. Finally, this measurement system 1 can be used on a large number of vehicle types, and does not require any adaptation piece from one type of vehicle to another.
    The configuration as described is not limited to the embodiments described above and shown in the figures. It has been given only as a non-limiting example. Multiple modifications can be made without departing from the scope of the invention. In particular, one could imagine, in the context of the second embodiment of the system 1 of the invention, a single source of emission 12 of a laser beam mounted at one end of one of the two transverse bars 2 and a receiving cell 13 of this laser beam mounted on the same side of the vehicle at the end of the other transverse bar 2.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1. Measurement system (1) of the torsion angle (a) of the body of a vehicle (V), in particular automobile, comprising at least two rigid straight bars (2, 2a, 2b) removably secured to the bottom of vehicle body (V), transversely to the longitudinal direction of the vehicle and spaced from one another, and a measuring device (10, 11, 12, 13) integral with the end of at least one two transverse bars (2, 2a, 2b) and able to measure the torsion angle (a) of the body from the relative vertical offset (H) between the two ends situated on the same side of the two transverse bars ( 2, 2a, 2b).
    [2" id="c-fr-0002]
    2. Measuring system (1) according to claim 1, characterized in that the two transverse bars (2, 2a, 2b) are secured to the longitudinal members respectively front and rear of the vehicle body (V).
    [3" id="c-fr-0003]
    3. Measuring system (1) according to claim 1 or 2, characterized in that it comprises a longitudinal bar (3) disposed parallel to the longitudinal axis of the vehicle and connected by one end rigidly to one of the two bars transversely (2a) and at the other end pivotally to the other crossbar (2b) relative to the axis of the longitudinal bar (3).
    [4" id="c-fr-0004]
    4. Measuring system (1) according to claim 3, characterized in that the longitudinal bar (3) is telescopic so as to adjust the spacing distance between the two transverse bars (2a, 2b) connected to the ends of the bar longitudinal (3).
    [5" id="c-fr-0005]
    5. Measuring system (1) according to claim 3 or 4, characterized in that it comprises an intermediate transverse bar (8) positioned near the pivotally mounted transverse bar (2b) on the longitudinal bar (3), a end of the intermediate transverse bar (8) being integral with the longitudinal bar (3) so that the relative vertical offset (H) measured between the pivotally mounted transverse bar (2b) and the intermediate transverse bar (8) is the same as the relative vertical offset (H) between the two transverse bars (2a, 2b) integral with the underside of the vehicle (V).
    [6" id="c-fr-0006]
    6. Measuring system (1) according to claim 5, characterized in that the measuring device comprises a touch probe device (10) integral with the end of the pivotally mounted transverse bar (2b) and whose probe ( 11) is in contact with the intermediate transverse bar (8) at the end of the latter.
    [7" id="c-fr-0007]
    7. Measuring system (1) according to any one of claims 1 to 4, characterized in that the measuring device comprises at least one laser source (12) integral with the end of one of the two transverse bars ( 2) and a reception cell (13) integral with the end of the other transverse bar (2) and adapted to receive a laser beam emitted by the laser source (12) and a processing unit of the output signal of the cell (13).
    [8" id="c-fr-0008]
    8. Measuring system (1) according to one of claims 1 to 4, characterized in that it comprises two measuring devices respectively comprising two laser sources (12) integral with the ends of the two transverse bars (2) and two cells receiving means (13) integral with the ends of the two transverse bars (2) and adapted respectively to receive the two laser beams emitted by the two laser sources (12) and a processing unit of the output signals of the reception cells (13).
    [9" id="c-fr-0009]
    9. A method of measuring the torsion angle (a) of the body of a vehicle (V), in particular an automobile, by means of a measuring system (1) according to any one of claims 1 to 8, characterized in that it comprises: • a step of torsion of the vehicle body (V), • a step of measuring the relative vertical offset (H) between the two ends of the two transverse bars (2, 2a , 2b), • A step of calculating the torsion angle (a) of the vehicle body (V) according to the formula a = arctan (L / #), where H is the measured value of the vertical offset and L is the value of the transverse distance separating each measuring device from the longitudinal axis of the vehicle, • A step of normalizing the torsion angle (a), by dividing the value of the angle (a) by the longitudinal distance (D ) separating the two transverse bars (2, 2a, 2b) integral with the underside of the vehicle (V).
    [10" id="c-fr-0010]
    10. Measuring method according to claim 9, characterized in that the step of torsion of the vehicle body (V) is performed via platforms mounted on cylinders on which the wheels (R) of the vehicle (V) , and imposing vertical deflections diagonally opposite to the wheels (R) of the vehicle (V).
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    同族专利:
    公开号 | 公开日
    EP3205975B1|2018-08-15|
    EP3205975A1|2017-08-16|
    FR3047558B1|2019-04-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4330945A|1980-03-31|1982-05-25|Kansas Jack, Inc.|Vehicle frame and body alignment apparatus|
    DE10154337A1|2001-03-21|2002-09-26|Volkswagen Ag|Determining comfort relevance of global elastic vehicle movements when traveling involves breaking down vibrations occurring during travel into rigid and/or elastic global movement forms|
    CN104848830A|2014-10-09|2015-08-19|北汽福田汽车股份有限公司|Measuring system and method of vehicle frame torsion angle|
    DE102010012178B4|2010-03-19|2012-01-19|Bayerische Motoren Werke Aktiengesellschaft|Device and method for determining a body deformation of a vehicle|DE102019202272A1|2019-02-20|2020-08-20|Zf Friedrichshafen Ag|Device for vehicle frame torsion measurement|
    CN109969261A|2019-03-05|2019-07-05|深兰科技（上海）有限公司|A kind of car body and vehicle of dimension adjustable|
    CN109990725A|2019-03-25|2019-07-09|上海车功坊智能科技股份有限公司|A kind of automobile body part deformation detection method|
    法律状态:
    2017-01-23| PLFP| Fee payment|Year of fee payment: 2 |
    2017-08-11| PLSC| Publication of the preliminary search report|Effective date: 20170811 |
    2018-01-23| PLFP| Fee payment|Year of fee payment: 3 |
    2020-01-22| PLFP| Fee payment|Year of fee payment: 5 |
    2021-01-20| PLFP| Fee payment|Year of fee payment: 6 |
    2022-01-19| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1650992|2016-02-09|
    FR1650992A|FR3047558B1|2016-02-09|2016-02-09|SYSTEM AND METHOD FOR MEASURING THE TORSION ANGLE OF THE BODY OF A VEHICLE|FR1650992A| FR3047558B1|2016-02-09|2016-02-09|SYSTEM AND METHOD FOR MEASURING THE TORSION ANGLE OF THE BODY OF A VEHICLE|
    EP17150601.7A| EP3205975B1|2016-02-09|2017-01-09|System and method for measuring the twist angle of the body of a vehicle|
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