BE1018407A5 - INSTALLATION OF LINEAR FORCE DISTRIBUTION MEASUREMENT OF A WIPER BLADE AGAINST A WIPING SURFACE. - Google Patents

Abstract

A measuring device for measuring the linear force of a wiper blade against a measurement surface, comprising - a wiper blade receiving device for applying a force to the wiper blade; windscreen wiper towards the measuring surface; - measuring apparatus (20) having a curvature (22) in the longitudinal direction of the windscreen wiper blade (12) and on which is arranged in the longitudinal direction of the brush, a set of measuring sensors (24), for measuring the linear force of the wiper blade (12) on the measuring sensors (24), a displacement device (28) for relative movement between measuring apparatus (20) and the receiving device (16), and allowing a dynamic linear force measurement of the wiper blade (12) as it moves on the measuring sensors (24).

Description

INSTALLATION OF LINEAR FORCE DISTRIBUTION MEASUREMENT OF A WIPER BLADE AGAINST A WINDSCREEN SURFACE

The present invention relates to a measurement installation for obtaining the measurement of the linear force distribution 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 windscreen wiper blades with respect to the internal requirements or specifications given by motor vehicle manufacturers.

The installation presented, which is the subject of the present invention, also makes it possible to test wiper blades during development and thus constitutes an aid to the design of new windscreen wiper blades.

In the field of wiping, the force of application of a wiper blade against the window of a vehicle or windshield and the distribution of this linear force over the length of the wiper blade. ice are particularly important for the wiper quality of a motor vehicle wiper.

In fact, the knowledge of these elements makes it possible, if necessary, to adjust the production elements of the wiper blade and / or to act on the parameters of the wiper device, for example on the wiper arm. or on the connector connecting the blade to the wiper arm to achieve optimum wiping quality.

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 windshield of a motor vehicle.

The document FR 2 895 080 A1 describes in particular a measuring installation for detecting the distribution of the linear force of a windscreen 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 comprising a set of measuring sensors arranged 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; wiper during the measuring operation, and an operating unit connected to the measuring apparatus for analyzing the data.

In this device, the wiper blade is applied, via the receiving device, against the convexly curved 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 measure of linear force distribution of the wiper blade on a surface is performed statically, that is to say without relative displacement between the wiper blade and the surface of the sensors during the achievement of the measure.

This measure, while providing interesting information, however, has the disadvantage

Furthermore, the sensors used in the installation of the prior art are strain gauge sensors, such as "load cell" which 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.

Note also that the sensors generally used in the prior art are subject to fouling which require revision and / or regular cleaning.

It may also be mentioned that such a measurement installation has the disadvantage of being difficult to transport.

Therefore, the technical problem to be solved, by the object of the present invention, is to propose a measuring installation for obtaining the linear force distribution of a wiper blade supported by a force against a surface, in which the measurement carried out as close as possible to that corresponding to a real wiping situation.

The solution to the technical problem posed consists, according to the present invention, in that the installation comprises a displacement device for a displacement, in the transverse direction of the installation, of the measuring apparatus with respect to the receiving device, said displacement device being operable during the measuring operation to allow a dynamic linear force measurement of the wiper blade as it moves over 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.

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, it is proposed a method for measuring linear force repetition of a wiper blade, comprising a wiper blade, against a measurement 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, - 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 windscreen wiper blade to enable 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 performed during the movement of the wiper blade. of wiper on the surface of the measuring sensors so as to have a dynamic measurement of the linear force of the wiper blade against the measuring surface.

The invention as defined in both its measuring installation and the measurement method has the advantage of being able to perform dynamic linear force measurements allowing a very good repeatability of the measurements and of being extremely convenient to to employ.

Moreover, it allows the use of sensors easier to implement and economically less expensive.

The present invention also relates to the features which will emerge in the course of the description which follows, and which should be considered 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 1a 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 wiping blade; in the rest position and in the normal position of use, 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 indicated in FIG. 1a will be adopted without limitation.

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 in a schematic manner.

FIG. 1a is a diagrammatic representation of a measuring installation 10 for allowing a linear force distribution measurement, resulting from the support force, of a windscreen wiper blade 12 against a measurement surface. 14 of a measuring device 20.

To enable 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 able to accommodate a weight 21 of mass given .

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.

With regard to the force-applying means 19, according to the pressing force that it is desired to exert on the windscreen wiper blade 12 for its support against the measuring surface 14, weights 21 of different mass will be used, typically 200g to 2 Kg.

The force application means 19 is vertically movable, to allow, in a high position, the assembly / disassembly of the wiper blade 12 without contact with the measuring surface 14 and to allow, in the low position, the setting in support of the wiper blade 12 against the measurement surface 14. Thus, the approach of the receiving device 16, provided with the wiper blade 12 on which it is desired to take the measurement, towards the measuring surface 14 , is made in a direction perpendicular to the measuring surface14.

According to a complementary embodiment not shown, the receiving device comprises a wiper arm. In this case, the applied bearing force is regulated by means of the springs conventionally equipping 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 to cover a substantial portion of the measurement surface 14. These measurement sensors 24 are intended to measure a parameter representative of the force 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 In the present case, the measuring sensors 24 are commercially available resistive sensors. It is also possible to use capacitive or piezoelectric type sensors.

In the representation of FIG. 1a, the force-applying means 19 apply a force substantially perpendicular to the measuring surface 14 during the application of the wiper blade 12 to the measuring surface 14 provided with the sensors measuring 24.

In addition 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 a transmission element 29 and a movable support 30.

In the embodiment of FIG. 1a, the mobile support 30 supports the measuring apparatus 20 so that the movement between the measuring apparatus 20 and the receiving device 16 takes place in the direction of an approximation and / or a distance from the measuring apparatus 20 with respect to the receiving device 16.

This movement is achieved by means of a transmission element 29 which is, for example, a motor or a hydraulic or pneumatic cylinder. Non-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 displacement device 28 moves the measuring apparatus 20 is calibrated as a function of the distance over which the linear force measurement is to be made and as a function of the surface of the measuring sensors 24.

Thus, according to the invention, once the ice-shelf is positioned on the receiving arrangement 16 and bears against the measurement surface 14, the displacement device is actuated to allow measurement operations. 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 wiper blade 12 during its displacement on the measuring sensors 24.

Interestingly, the transmission means 29 allowing the displacement of the displacement device 28 are reversible, which makes it possible to make measurements of linear force during the distance between the measuring device 20 and the receiving device 16 of the broom. wiper, 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 installation comprises a converter 27 of the measured data and an operating unit 26 of the data measured during the measuring operations.

The converter 27 makes it possible to convert the information measured by the sensors, here a resistance (in Ω), information relating to a force (in N / m).

The operating unit 26, for its part, 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 measuring sensors. This distribution of linear force over the length of the wiper blade can be given over the entire measuring path or averaged over this course.

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. 1a. In the same way 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 measuring surface 14 of a measuring device 20.

In this embodiment, the measuring apparatus 20 comprises the measuring surface 14 as well as a receiving surface 40 formed by "false curves" of a device of "false curves" 36. This device "false curves" 36 belonging to the measuring device 20, allows the assembly / disassembly of the wiper blade 12 before its application or transfer on the measuring surface 14.

This device "false curves" is -formed a frame 37tsur which is rotatably mounted mounted, two "false curves" 38a and 38b. A handle 39 activates the rotational movement of the "false curves" 38a and 38b.

In the mounting phase, the "false curves" 38a and 38b are in the lower position as shown in Figure 1b and the wiper blade 12 is arranged on the device of "false curves" 36. Once the broom wiper 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 receiving surface 40. By this action, the 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 measuring surface 14.

As previously, 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 the platform 19a can accommodate a weight 21 given mass.

Alternatively, a stirrup system 19b is also present on the force applying means 19. This stirrup system 19b, similar to holding clamps, keeps the windscreen wiper blade 12 in a position given during 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 before adding the weight 21. The system balance 35 is rotatably mounted about an axis A of the frame 17.

Thus, according to the invention, once the wiper blade 12 is positioned on the receiving device 16 and resting on the device "false curves" 36, the displacement device is actuated to allow 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 wiper blade 12 during its displacement on the measuring sensors 24.

In the example presented, because of the balance system 35, the assembly / disassembly on a brush is no longer by placing the wiper blade in the upper position on the force application means but by using the device of "false curves" 36.

The rest of the device and its operation are similar to those exposed in the context of Figure 1a.

Conventionally and as shown in Figure 2a, the wiper blade comprises a wiper blade 13 formed of a heel 13a and a fir 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) for 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 an application of force perpendicular to the measurement surface 14.

However, when using the measurement system for development phases, it may be interesting to measure 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 in particular shown in FIG.

As can be seen, the angle variation device 32 is mounted between the receiving device 16 and the wiper blade 12. It is mounted on the receiving device 16 via the coupling device 18 and is connected to the wiper blade through 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 measuring installations 10 presented above in FIGS. 1b or with an installation exhibiting only 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 with respect to the windscreen wiper blade 12 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.

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. measure 14.

The measuring method also comprises a step of supplying measured and / or converted linear force values to an operating unit 26 for determining the linear force distribution of the wiper blade 12 against the measuring surface 14. .

In a complementary manner, 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 setting parameters of the wiper blade are not the same in one direction of stall 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 by means of an angle variation device 32, the angle of attack that 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 measuring installation 10 previously described for wiper blade conformity checking operations, it is highly desirable to integrate this measurement system with a broom wiper installation. '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 the wiper blade; windscreen wiper 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 affecting the linear force distribution of the wiper blade and thus improve the quality of the latter.

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 blade for wiping the broom 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, measurement surfaces are provided with radii of curvature 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 linear force measurement is closer to the actual conditions of positioning the blade on a vehicle windshield.

Claims (27)

A metering device (10) for measuring the linear force distribution of a wiper blade (12) against a measurement surface (14), said wiper blade (12) comprising a blade (12) wiping (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 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 wiping blade (13) on the measuring sensors (24), characterized in that the plant comprises, in addition, a displacement device (28) for moving, in the transverse direction of the installation, the measuring apparatus (20) with respect to the receiving device (16), said moving device (28) being operable during the measuring operation to allow a dynamic measurement of linear · force of the bala i wiper (12) when moving the measuring sensors (24) relative to the wiper blade (12). 2. Measuring installation (10) according to claim 1 characterized in that it comprises an operating unit (26) connected to the measuring apparatus (20) allowing the aid of linear forces measured during the operation method for dynamically obtaining the visual and graphical representation of linear force distribution of the wiper blade (12) on the measuring surface (14). Measuring device (10) according to claim 1 or 2, characterized in that the measuring device (20) has a receiving surface (14, 40) of the windscreen wiper blade (12) prior to use. route of relative movement between the measuring apparatus (20) and the receiving device (16). Measuring device (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 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). Measuring device (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 device (20). ). Measurement apparatus (10) for measuring the linear force distribution of a wiper blade (12) whose wiper blade (13) comprises a bead (13a) and a bolster (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). ). Measuring device (10) according to one of the preceding claims, characterized in that the measuring surface (14) with curvature (22) has a radius of curvature to be chosen from the list 3000 mm, 4000 mm, 4500 mm, 5000 mm or corresponding to a windshield section of a motor vehicle windshield. Measuring device (10) according to one of the preceding claims, characterized in that the wiper blade (12) is hingedly mounted 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). 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. Measuring device (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. Measuring device (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 device (20). Measuring device (10) according to 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). 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. Measuring device (10) according to 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 measuring device. operating unit (26). 19. Installation 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 it comprises a measuring installation according to claims 1 to 18. 20. A method for measuring the linear force distribution of a wiper blade (12) comprising a wiper blade (13) against a measuring surface (14) having measuring sensors (24) arranged on a portion of the measuring 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), - moving the 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, one starts e the measurement of the linear force distribution of the wiper blade (12) against the measurement surface (14), this measurement being made during the displacement of the surface carrying the measuring sensors with respect to the wiper blade; mirror (12) to have 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 representation of the linear force distribution of the blade broom. wiper (12) against the measuring surface (14). 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 measuring surface (14) takes place in both directions. direction in a direction transverse to the longitudinal direction of the wiper blade (12). 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). 24. A method of 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 wiper (12), the method of measuring the linear force distribution according to claims 20 to 23 is applied to check the conformity of the wiper blades with respect to given specifications. 25. The manufacturing method according to claim 24, characterized in that the measured linear force values are supplied, after operation by the operating unit (26), to a station managing the manufacture of the support elements (15) of the broom. windshield wiper (12). 26. The 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), to a station managing the assembly between the blade broom. windscreen wiper (12) and its connector (18). 27. Method according to one of claims 24 or 25, characterized in that the values of measured linear force are provided, after operation by the operating unit (26), to a manufacturing station of the wiper blade (13) the wiper blade (12).