FR2919723A1 - INSTALLATION OF LINEAR FORCE DISTRIBUTION MEASUREMENT OF A WIPER BLADE AGAINST A WIPING SURFACE - Google Patents

Abstract

The present invention relates to a measuring device (10) for measuring the linear force of a wiper blade (12) against a measuring surface (14), comprising a device (16) for receiving the wiper blade (16). windscreen wiper (12) for applying a force on the windscreen wiper blade (12) to the measuring surface (14), - a measuring device (20) having the measuring surface ( 14), which has a curvature (22) in the longitudinal direction of the wiper blade (12) and on which is arranged, in the longitudinal direction of the blade, a set of measuring sensors (24) for measuring the linear force of the wiper blade (12) on the measuring sensors (24) .In accordance with the invention, the installation comprises a displacement device (28) for a relative displacement between the measuring device (20). and the receiving device (16), said moving device (28) being operable during the measuring operation to allow a m linear dynamic force measurement of the wiper blade (12) during its movement on the measuring sensors (24) .The present invention also provides a method for measuring the linear force of a wiper blade ( 12) against a measuring surface (14).

Description

INSTALLATION OF LINEAR FORCE DISTRIBUTION MEASUREMENT OF A BROOM

  WIPER AGAINST A WIPER SURFACE

  The present invention relates to a measuring apparatus for obtaining the linear force distribution measurement of a windscreen wiper blade supported by a force against a surface. The invention also relates to a measurement method for obtaining the measurement of linear force distribution of a windscreen wiper blade supported by a force against a surface. The invention makes it particularly interesting, but not exclusive, to check the conformity and to validate wiper blades with respect to the internal requirements or specifications given by motor vehicle manufacturers. The present invention, which is the subject of the present invention, also makes it possible to test wiper blades during development and thus constitutes an aid for the design of new windscreen wiper blades. In the field of wiping, the force of application of a wiper blade 20 against the window of a vehicle or windshield and the distribution of this linear force along the length of the wiper blade -glace are particularly important for the wiper quality of a motor vehicle wiper. In fact, knowledge of these elements makes it possible, if necessary, to adjust the production elements of the wiper blade and to act on the parameters of the wiper device, for example on the wiper arm. ice or the connector connecting the broom to the wiper arm to achieve an optimum quality of wiping. To enable this knowledge, it is known to use devices for measuring the linear force distribution of a wiper blade on a surface representing a motor vehicle windshield. The document FR 2 895 080 A1 describes in particular a measuring installation for detecting the distribution of the linear force of a wiper blade supported by a force against a surface, according to the prior art. This installation comprises: a coupling element hingedly connecting the wiper blade to a receiving device which applies a force substantially perpendicular to the surface, a measuring apparatus which comprises a set of measuring sensors disposed in the longitudinal direction of the wiper blade, and forming a convexly curved surface in the longitudinal direction of the wiper blade for supporting the wiper blade during the measuring operation, and an operating unit connected to the measuring device for data analysis. In this device, the wiper blade is applied, via the receiving device, against the curved convex surface and is brought into contact with measurement sensors. Once in position, the measurement of distribution of the linear force of the wiper blade is carried out. This linear force distribution measurement of the wiper blade on a surface is performed statically, i.e. without relative displacement between the wiper blade and the surface of the sensors when the realization of the measure. This measurement, although it makes it possible to obtain interesting information, however has the disadvantage of being a static measurement which does not make it possible to simulate a real wiping situation since, during the measurement, there is no relative movement between the wiper blade and the surface of the sensors.

  Furthermore, the sensors used in the installation of the prior art are strain gauge sensors, weighing cell type that are particularly expensive, and very difficult to implement.

  Indeed, these sensors require a very high positioning accuracy which can be difficult to achieve because the measurement is done on a curved surface. It will also be noted that the sensors generally used in the prior art are subject to fouling, which require regular revision and / or cleaning. It may also be mentioned that such a measurement installation has the disadvantage of being difficult to transport. Also, the technical problem to be solved by the object of the present invention is to provide a measuring apparatus for obtaining the linear force distribution of a windscreen wiper blade supported by a force against a surface, in which the measurement made is as close as possible to that corresponding to a real wiping situation. The solution to the technical problem posed, according to the present invention, is that the installation comprises a displacement device allowing a relative movement between the measuring apparatus and the receiving device, said moving device being operable during the measuring operation to allow a dynamic linear force measurement of the wiper blade as it moves on the measurement sensors. The invention also seeks to obtain the linear force distribution of a wiper blade supported by a force against a surface. In addition, the invention also makes it possible to improve the measuring device in particular in terms of reliability and reproducibility.

  In a manner associated with the technical problem stated above, there is provided a method for measuring the linear force distribution of a wiper blade, comprising a wiper blade, against a measuring surface on which sensors are arranged. method, said method comprising the steps of: - positioning the wiper blade against the brush receiving surface, away from the measurement sensors, - adjusting the application force of the wiper blade against the receiving surface, the relative displacement of the measuring apparatus having the receiving surface with respect to the wiper blade in a direction transverse to the longitudinal direction of the wiper blade to allow the putting the blade in the normal working position. According to the invention, as soon as the wiper blade is in its normal working position, the measurement of the linear force of the wiper blade against the measuring surface is started, this measurement being made during the movement of the wiper blade. wiper blade on the surface of the measuring sensors so as to have a dynamic linear force measurement of the wiper blade against the measurement surface. The invention as defined in both its measuring installation and the measuring method has the advantage of being able to carry out dynamic linear force measurements allowing a very good repeatability of the measurements and being extremely convenient. to use. Moreover, it allows the use of sensors easier to implement and economically less expensive. The present invention also relates to the features which will become apparent in the course of the following description, and which should be considered in isolation or in all their possible technical combinations. This description given by way of nonlimiting example, will better understand how the invention can be made, with reference to the accompanying drawings in which: - Figure la is a schematic view of a measuring installation according to the invention, FIG. 1b is a diagrammatic view of a variant of the measuring installation of FIG. 1a; FIGS. 2a and 2b are cross-sectional views of a wiper blade having the structure of the blade; wiper in the rest position and in the normal use position, and - Figure 3 is a schematic view of an angle variation device used on the measuring installation. For the description of the invention, the vertical, longitudinal and transverse orientations according to the reference V, L, T shown in FIG. In addition, for the sake of clarity, the same elements have been designated by identical references. Likewise, only the essential elements for understanding the invention have been represented, and this without regard to the scale and schematically. FIG. 1a diagrammatically shows a measuring installation 10 for allowing a measure of linear force distribution, resulting from the support force, of a wiper blade 12 against a measurement surface 14 20. In order to allow application of the wiper blade 12 to the measuring surface 14, the wiper blade 12 is mounted on a receiving device 16. The receiving device 16 is formed of a frame 17 on which is mounted in a vertically movable manner, a force application means 19. The force application means 19 comprises a platform 19a accommodating a weight 21 of mass. The platform 19a allows the attachment of a coupling device 18 which may be, for example, an adapter and / or a mounting connector of a wiper blade on a wiper arm conventionally used on motor vehicles. However, it remains important to maintain good articulation between the wiper blade 12 and the receiving device 16 so that the measurements made are as close as possible to the normal conditions of use. Furthermore, it should be noted that the coupling device 18 provided makes it possible to maintain the interchangeability of the adapters and connectors for mounting the windscreen wiper blade 12 on the receiving device 16. Concerning the application means of FIG. force 19, according to the pressing force that is desired to exert on the wiper blade 12 for its support against the measuring surface 14, we will use weights 21 of different mass, typically from 200g to 2 Kg. The force-applying means 19 is vertically movable, to allow, in a raised position, the dismounting of the windscreen wiper blade 12 without contact with the measurement surface 14 and to allow, in the low position, the pressing the wiper blade 12 against the measurement surface 14. Thus, bringing the receiving device 16, provided with the wiper blade 12 on which it is desired to carry out the measurement, towards the surface of the wiper blade 12 measure 14, is made in a perpendicular direction area on the measuring surface14. According to a complementary embodiment not shown, the receiving device comprises a wiper arm. In this case, the applied restoring force is regulated by means of the springs conventionally fitted to the wiper arm and the positioning of the wiper blade on the measurement surface is done by folding the arm provided with its wiper blade on the measuring surface. As previously discussed, the measuring apparatus 20 thus comprises the measurement surface 14. This measurement surface 14 has a curvature 22 in the longitudinal direction of the wiper blade. This curvature is preferably convex and is chosen to be adapted to the curvature of a vehicle windshield corresponding to a certain application. In particular, for example, the radius of curvature is chosen from the list 3000mm, 4000mm, 4500mm, 5000mm or corresponds to a windshield section of a motor vehicle windshield. The measuring surface 14 forming part of a curve can therefore be changed depending on the tested wiper blade and the desired experiment parameters. On the measuring surface 14, a measuring sensor assembly 24 is arranged in the longitudinal direction so as to cover a substantial part of the measurement surface 14. These measurement sensors 24 are intended to measure a parameter representative of the linear force. of the wiper blade 12 when it is supported on the measuring sensors 24. These sensors are made in the form of a film 25 held, for example, with an adhesive or glue, on the Measuring surface 14. In this case, the measuring sensors 24 are commercially available resistive type sensors. It is also possible to use capacitive or piezoelectric type sensors.

  In the representation of FIG. 1a, the force application means 19 apply a force substantially perpendicular to the measurement surface 14 when the wiper blade 12 is applied to the measuring surface 14 provided with the sensors of FIG. 24. In addition to and according to the invention, the measuring device 10 also comprises a displacement device 28 for relatively moving the measuring apparatus 20 and the receiving device 16. The displacement device 28 comprises an element in the embodiment of FIG. 1a, the movable support 30 supports the measuring apparatus 20 so that the movement between the measuring apparatus 20 and the receiving device 16 is in the direction of bringing the measuring apparatus 20 closer and / or further away from the receiving device 16. This movement is effected by means of a transmission element 29 which is for example, a motor or hydraulic or pneumatic cylinder. Not described guide means are in particular provided for providing adequate guidance between the mobile support 30 supporting the measuring apparatus 20 and the receiving device 16. The distance over which the moving device 28 moves the measuring apparatus 20 is calibrated according to the distance on which it is desired to carry out the measurement of linear force and as a function of the surface of the measuring sensors 24. Thus, according to the invention, once the windscreen wiper blade is positioned on the arrangement of 16 and bearing against the measuring surface 14, the displacement device is actuated to allow measurement operations. These measurement operations are therefore performed dynamically during the time of displacement of the measuring apparatus 20 with respect to the receiving device 16 to allow a dynamic measurement of linear force distribution, of the windscreen wiper blade 12 when its displacement on the measurement sensors 24. Interestingly, the transmission means 29 allowing the displacement of the displacement device 28 are reversible, which makes it possible to measure the linear force during the distance between the device 20 and the receiving device 16 of the wiper blade, but also when bringing these two elements together. This is of great interest because it allows to perform measurements in alternative scanning conditions very close to reality. Additionally, the measurement facility includes a converter 27 of the measured data and an operating unit 26 of the measured data during measurement operations. The converter 27 converts the information measured by the sensors, here a resistance (in el), information relating to a force (in Nlm). The operating unit 26 makes it possible, by using the data of the converter 27, to display the linear force distribution of the wiper blade 12 on the measurement surface 14 which is provided with measurement sensors. This linear force distribution along the wiper blade length can be given over the entire measurement path or averaged over this path. The operating unit 26 is, for example, a computer equipped with a screen for displaying the measured values and the final result of the measured linear force distribution. With the measuring installation according to the invention, it is then possible to know the linear force distribution of a wiper blade against a surface in a scanning situation corresponding to a real wiping situation. All the elements of the installation and in particular the realization of the measurement dynamically make it possible to obtain a very good repeatability of the measurement. This is particularly important when trying to develop a new wiper blade or a new connection between the arm and the wiper blade. FIG. 1b schematically shows a variant of the measuring installation 10 shown in FIG. In the same manner as above, the installation of FIG. 1b allows a measure of linear force distribution, resulting from the support force, of a wiper blade 12 against a measurement surface 14. a measuring device 20.

  In this embodiment, the measuring apparatus 20 comprises the measurement surface 14 and a receiving surface 40 formed by false curves of a false-curve device 36. This false-curve device 36 belonging to the measuring apparatus 20, allows the assembly / disassembly of the wiper blade 12 before its application or transfer on the measurement surface 14. This false-curve device is formed of a frame 37 on which is mounted in a movable manner in rotation, two false curves 38a and 38b. A handle 39 makes it possible to actuate the rotational movement of the false curves 38a and 38b. In the assembly phase, the false curves 38a and 38b are in the lower position as shown in Figure lb and the wiper blade 12 is arranged on the false curve device 36. Once the wiper blade 12 attached to the receiving device via a coupling device 18, the actuation of the handle 39 can raise the false curves 38a and 38b and lock in the working position thus forming a surface By this action, the windscreen wiper blade 12 is also brought into the working position. The wiper blade 12, positioned on the receiving surface 40 formed by the false curves, is at the same level as the measurement surface 14. As before, the receiving device 16 is formed of a frame 17 vertically movable means for applying force 19. The force applying means 19 comprises the platform 19a accommodating a weight 21 of mass 30 given. Alternatively, a stirrup system 19b is also present on the force application means 19. This stirrup system 19b, similar to holding clamps, keeps the windscreen wiper blade 12 in place. a given position when carrying out the measurement and avoids any rotational movement and / or torsion of said blade during the dynamic measurement movement. According to the invention and as shown in the variant of Figure 1b, the force application means 19 is connected to a balance system 35 for balancing the receiving system 16 io before adding the weight 21. The balance system 35 is rotatably mounted about an axis A of the frame 17. Thus, according to the invention, once the windscreen wiper blade 12 is positioned on the receiving device 16 and bears on the false-curve device 36, the displacement device is actuated to enable measurement operations. The relative movement of the wiper blade relative to the measuring device 20 allows it to rest against the measuring surface 14 before the measuring operations begin. These measurement operations are therefore performed dynamically during the time of the displacement of the measuring apparatus 20 with respect to the receiving device 16 to allow a dynamic measurement of the linear force distribution of the windscreen wiper blade 12 when its displacement on the measurement sensors 24. In the example presented, because of the balance system 35, the assembly / disassembly on a brush is no longer done by placing the wiper blade in the upper position on the means application of force but by the use of the false curve device 36. The rest of the device and its operation are similar to those shown in the context of Figure la. Conventionally and as shown in Fig. 2a, the wiper blade comprises a wiper blade 13 formed of a heel 13a and a birch 13b. In the installation presented above, the fir 13b of the blade 13 of the wiper blade is pressed against the receiving surface: measuring surface 14 (FIG. 1a) or associated curved surface (FIG. 1b) to carry out measurement operations. In the embodiment shown in FIGS. 1a and 1b, the measuring operations are carried out with an angle of attack (angle between the median plane of the wiper blade and the normal to the measurement surface) zero. In the present case, this corresponds to a force application perpendicular to the measuring surface 14. However, when using the measurement system for development phases, it may be advantageous to measure the linear force with a non-zero angle of attack. For this purpose and according to the invention, the measuring installation has a drive angle variation device 32 for varying the angle between the median plane of the wiper blade 13 and the normal to the surface. This device is particularly shown in FIG. 3. As can be seen, the angle variation device 32 is mounted between the receiving device 16 and the windscreen wiper blade 12. It is mounted on the receiving device 16 via the coupling device 18 and is connected to the wiper blade by means of an adapter. The angle variation device 32 comprises an angle selection wheel 33 for selecting the angle of attack that is to be applied between the median plane of the wiper blade and the normal to the surface of the wiper blade. measured. The angle of attack chosen is visualized at a graduated zone 34.

  The invention also provides a method for performing linear force measurement.

  This method may be associated with the measurement facilities 10 shown above in FIGS. 1a and 1b or in an installation having only a part of the characteristics of the exposed measuring installation.

  This method of measuring the linear force of a wiper blade 12, comprising a wiper blade 13, against a measuring surface 14 on which are arranged in the longitudinal direction, measurement sensors 24, comprises in particular the following steps: - assembly of the wiper blade on its coupling device 18, - positioning of the wiper blade 12 on a receiving surface 40, 14 associated with the measuring surface 14, away from the sensors measuring 24, - adjustment of the application force of the wiper blade 12 against the receiving surface 40, 14. This adjustment is done for example by applying a weight 21 on the platform 19a means of application of force 19. relative displacement of the measuring apparatus relative to the wiper blade 12 in a direction transverse to the longitudinal direction of the wiper blade 12 to allow the blade to be placed in normal working position. By positioning the blade in its normal working position is meant a wedging of the wiper blade on the receiving surface 40, 14 as shown in Figure 2b. This setting is particularly important because it allows measurements to be made in a position close to the tilting position of the wiper blade when wiping a windshield.

  Thus, as soon as the wiper blade 13 is in its normal working position, the measurement of the pressing force of the wiper blade against the measurement surface is started. According to the invention, this measurement is performed during the movement of the wiper blade 12 on the surface of the measuring sensors 24 so as to have a dynamic linear force measurement of the wiper blade 12 against the surface of the wiper blade 12. Measurement 14. The measuring method also comprises a step of supplying measured linear force values and / or converted to an operating unit 26 enabling the linear force distribution of the wiper blade 12 to be determined against the measuring surface. 14. Complementarily, the dynamic measurement of the linear force distribution of the wiper blade against the measurement surface takes place in both directions in a direction transverse to the longitudinal direction of the wiper blade. 12. It is thus a round trip of the wiper blade 13 on the measurement sensors 24. This may be important if, because of the manufacture of the blade, the parameters of The wiper blades are not the same in one direction and in the other. This also makes it possible to measure the influence of the setting of the wiper blade 13 in one direction or the other, on the distribution measurements obtained. Furthermore, prior to the step of positioning the wiper blade 12 against the measuring surface 14 or against the receiving surface 40 of the false curve device 36, it is regulated, via a angle variation device 32, the angle of attack which will be applied between the fir 13b of the wiper blade 13 and the measuring surface 14.

  The method described above makes it possible in particular to measure the linear force of wiper blades of flat-blade type. This method is generally applied, after the manufacture of the wiper blade 12, to check the compliance of the wiper blades with respect to given specifications. When it is desired to use the previously described measuring installation 10 for wiper blade compliance verification operations, it is highly desirable to integrate this measurement setup with a broom manufacturing facility. wiper. Indeed, this makes it possible to act on certain manufacturing parameters such as, for example: the manufacture of windscreen wiper blades and in particular of the support element or elements that they comprise, - the assembly between the wiper blade and its connector, or the manufacture of the wiping blade of the wiper blade. This makes it possible to act quickly, before observing excessive drift, on the parameters influencing the linear force distribution of the wiper blade and thus to improve the quality of the wiper blades. In a complementary manner, these steps of providing information to different installations, such as the manufacturing facilities for the support elements, the assembly between the windscreen wiper blade and its connector, and the manufacture of the wiping blade of the wiper blade. Wiper blades are also provided as part of the manufacturing and measuring process of the present invention. In a complementary manner, it is also possible to provide particular curves for the measuring surface 14. In particular, with the development of so-called panoramic windshields, measuring surfaces are provided with radii of curvature that are locally variable over the length of the surface. . In the same way, it is desirable to have the measurement sensors at the critical areas on which it is desired to measure, for example, the total length of the windscreen wiper blade or a part of it only. . It will be noted again the advantage of performing linear force measurements dynamically compared to a simple static measurement.

  Indeed, a static measurement causes a lifting of the blade due to the loss of tangential friction force between the fir of the wiper blade and the surface to be wiped. Dynamic dynamic force measurement is closer to the actual conditions of positioning the blade on a vehicle windshield.

Claims (27)

  A measuring apparatus (10) for measuring the linear force distribution of a wiper blade (12) against a measurement surface (14), said wiper blade (12) comprising a blade wiping device (13); the measuring device (10) comprising - a wiper blade receiving device (16) for applying a force to the wiper blade (12) in the direction of the wiper blade (12); measuring surface (14), - a measuring apparatus (20) having the measurement surface (14), which has a curvature (22) in the longitudinal direction of the wiper blade (12) and on which is arranged, in the longitudinal direction of the blade, a set of measuring sensors (24) for measuring the linear force of the wiper blade (13) on the measuring sensors (24), characterized in that the installation further comprises a displacement device (28) for relative displacement between the measuring apparatus (20) and the receiving device (16), said moving device (28) being operable during the measuring operation to allow a dynamic linear force measurement of the wiper blade (12) as it moves over the sensors measuring (24).   2 - Measuring installation (10) according to claim 1, characterized in that it comprises an operating unit (26) connected to the measuring apparatus (20) allowing using the linear forces measured during the dynamic measuring operation to obtain the visual and graphical representation of linear force distribution of the wiper blade (12) on the measuring surface (14). 30   3 - measuring installation (10) according to claim 1 or 2, characterized in that the measuring apparatus (20) comprises a receiving surface (14, 40) of the windscreen wiper blade (12) before route of relative movement between the measuring apparatus (20) and the receiving device (16).   4 - measuring installation (10) according to claim 3, characterized in that the receiving device (16) comprises means for applying a force (19) to the wiper blade (12), according to a direction perpendicular to the receiving surface (40, 14) allowing the wiper blade (12) to rest against the receiving surface (14, 40).   5 - measuring installation (10) according to claim 4, characterized in that the means for applying a force (19) to the windscreen wiper blade (12) enable the reception device (16 ) to the measuring surface (14) in a direction perpendicular to the measurement surface (14) until the wiping blade (12) of the wiping blade (12) bears against the surface measuring (14).   6 - measuring installation (10) according to one of claims 3 or 4, characterized in that the receiving surface (40) is formed on a false curve device (36) of the measuring apparatus (20).   7 - Measuring device (10) for measuring the linear force distribution of a wiper blade (12) whose wiper blade (13) comprises a heel (13a) and a fir (13b) against a measuring surface (14) according to any one of the preceding claims, characterized in that it also comprises an angle variation device (32) for varying the angle between the median plane of the fir ( 13b) of the wiper blade (13) and the measurement surface (14) when applying the wiping blade (13) of the wiper blade (12) to the measuring surface (14). ). s   8 - measuring installation (10) according to any one of the preceding claims, characterized in that the measuring surface (14) curvature (22) has a radius of curvature to be chosen from the list 3000mm, 4000 mm, 4500 mm, 5000 mm or corresponding to a windshield section of a motor vehicle windshield. 10   9 - measuring installation (10) according to any one of the preceding claims, characterized in that the wiper blade (12) is mounted in an articulated manner on the receiving device (16) via a coupling device (18).   10 - measuring installation (10) according to any one of the preceding claims characterized in that the receiving device (16) comprises a balance system (35) for balancing the receiving system (16). 20   11 - measuring installation (10) according to any one of the preceding claims characterized in that the receiving device (16) comprises guide means (19b) of the wiper blade (12) during measurement operations. 25   12 - measuring installation (10) according to any one of the preceding claims, characterized in that the displacement device (28) comprises a support (30) movable transversely to the longitudinal direction of the wiper blade (12) and for supporting the measuring apparatus (20).   Measuring device (10) according to one of the preceding claims, characterized in that the displacement device (28) comprises a transmission element (29) for the relative movement between the measuring device (20) and the receiving device (16).   14 - measuring installation (10) according to claim 13, characterized in that the transmission element (29) is reversible. io   15 - measuring installation (10) according to claim 13 or 14, characterized in that the putting into operation of the transmission element (29) automatically actuates the operation of the measuring apparatus (20). 15   16 - measuring installation (10) according to any one of the preceding claims, characterized in that the measuring sensors (24) are in the form of a film (25) held on the measuring surface (14). 20   17 - measuring installation (10) according to any one of the preceding claims, characterized in that the measuring sensors (24) are of the resistive, capacitive or piezoelectric type.   18 - Measuring installation (10) according to any one of the preceding claims, characterized in that the measuring sensors (24) are connected to a converter (27) which receives the measurement data and which then transmits them to the user. operating unit (26).   19 - Installation for manufacturing a wiper blade (12) of flat-blade type comprising a wiper blade (13) and at least one support element (15) characterized in that it comprises a measuring installation according to claims 1 to 18.   20 - Method for measuring the linear force distribution of a wiper blade (12) comprising a wiper blade (13), against a measurement surface (14) having measuring sensors (24) arranged on a portion of the measurement surface (14) in the longitudinal direction thereof, said method comprising the steps of: - positioning the wiper blade (12) against a receiving surface (14, 40) associated with the measuring surface (14), remote from the measuring sensors (24), - adjusting the application force of the wiper blade (12) against the receiving surface (14, 40), - relative displacement the measuring apparatus (20) with respect to the wiper blade in a direction transverse to the longitudinal direction of the wiper blade (12) to allow the blade to be placed in the normal working position , characterized in that, as soon as the wiper blade (13) is in its normal working position, the measurement is started of linear force distribution of the wiper blade (12) against the measuring surface (14), this measurement being effected during the movement of the wiper blade (12) on the surface of the measuring sensors so as to having a dynamic measurement of the linear force distribution of the wiper blade (12) against the measuring surface (14).   21 - Measuring method according to claim 20, characterized in that it also comprises the step of supplying the values of the measured linear forces to an operating unit (26) allowing the presentation of the linear force distribution of the blade broom. wiper (12) against the measuring surface (14).   22 - Measuring method according to claim 20 or 21, characterized in that the dynamic measurement of the distribution of the linear force of the wiper blade (12) against the measurement surface (14) takes place in both direction in a direction transverse to the longitudinal direction of the wiper blade (12). i0   23 - Measuring method according to any one of claims 20 to 22, for a wiper blade (12) whose wiper blade (13) comprises a heel (13a) and a fir (13b), characterized in that, prior to the step of positioning the wiper blade (12) against the measuring surface (14), it is regulated by means of an angle variation device (32). ), the angle that will be applied between the fir (13b) of the wiper blade (13) and the measuring surface (14). 20   24 - Method for manufacturing a wiper blade (12) of the flat blade type comprising a wiper blade (13) and at least one support element (15) characterized in that, after the manufacture of the wiper blade The windscreen wiper (12) applies the method of measuring the linear force distribution according to claims 20 to 23 to check the conformity of the wiper blades with respect to given specifications.   25 - Manufacturing method according to claim 24, characterized in that the measured linear force values are provided, after operation by the operating unit (26), to a postmanufacturing the support elements (15) of the broom windshield wiper (12).   26 - Manufacturing method according to claim 24 or 25, characterized in that the measured linear force values are provided, after operation by the operating unit (26), a station managing the assembly between the broom d ' windscreen wiper (12) and its connector (18). l0   27 - Method according to one of claims 24 or 25, characterized in that the measured linear force values are provided, after operation by the operating unit (26), to a manufacturing station of the wiper blade (13) the wiper blade (12). 15