DE102008005807A1 - Measuring arrangement for use in e.g. anti-skid system, has signal transmission line for transmitting signal to receiver of electronic controller, and optical sensor element for periodically detecting overall image from multiple reflectors - Google Patents

Abstract

The arrangement has an optical sensor element i.e. digital image recording device (40), and an optical transmission element (30), which are arranged at a rim (50) and supplied with electrical energy from a voltage source. Multiple reflectors (20) are arranged at an inner surface of a pneumatic flexible tire (10) opposite to the optical sensor element. A wire-bound or wireless signal transmission line (70) transmits signal to a receiver of an electronic controller (80). The optical sensor element periodically detects an overall image from multiple reflectors. Independent claims are also included for the following: (1) a chassis controlling system for dynamic adaptation of chassis characteristics of a vehicle on the basis of deformation of a pneumatic tire (2) a method for dynamic measurement of longitudinal and transverse forces arising at a pneumatic tire in a contact area with a road.

Description

The The invention relates to a measuring arrangement for dynamically measuring the mechanical deformation of a pneumatic, mounted on a rim elastic tire in the contact area with the road with the in Preamble of claim 1 mentioned features. Furthermore They provide a method for dynamically measuring at a pneumatic Tires occurring in the area of contact with the road surface and transverse forces with the in the preamble of claim 17 mentioned features and a chassis control system for adjusting the Driving characteristics of a vehicle with those in the preamble of the claim 25 mentioned features.

It it is known that the condition of a tire, especially the air pressure, a great influence on the driving characteristics of a vehicle exercises. The air pressure is therefore measured in many applications and passed an electronic control. However, supplies the air pressure alone does not provide information about the current one Driving situation, for example, whether the vehicle is in a sharp cornering is driven or moved over bumps. To get information about this use different ones known systems acceleration sensors that transmit a signal over Provide lateral and / or longitudinal acceleration of the vehicle. The system may, for example, be a mass inertia sensor be that sends a signal for the whole vehicle. Further are known systems for determining the transverse and / or longitudinal acceleration the deformation of the inner surface of one or more wheel tires use. However, such a system does not differentiate front and rear, inboard and outboard wheels.

The Tire friction is the physical requirement for each Driving maneuvers. The active mechatronic measures, for example Anti-lock Braking System (ABS), Electronic Stability Program (ESP), only the existing friction between tires and use the road more effectively, but do not exceed. For a further improvement of the ABS and ESP systems to improve the dynamic driving characteristics of a vehicle Therefore, the tire condition detection is an important development direction with a big potential.

The Emergence of the friction of the tire is a dynamic, complex Interaction between the tire and the road surface and dependent from the characteristics of these two sides involved. There are from the tire side, for example, the type, rubber compound and operating parameters (Driving speed, wheel load, tire pressure, slip, slip angle) and from the road side for example the texture, temperature and Impurity films on the road surface (for example, water, oil, Ice cream, dust ...). The coefficient of friction does not remain constant, because the influencing parameters always change. On this complex Interaction of the tire reacts with its deformation especially in the contact zone between tires and the roadway (the so-called Latsch). This deformation already arises when rolling because of the Flattening of the tire. When braking and a drive or Cornering are superimposed additional deformations. The complex tire condition can therefore be explained by the deformations of the tire Tire are characterized.

The DE 197 44 611 A1 discloses a measuring system for measuring the distance between a sensor unit positioned on the rim inside the tire and the inner wall of the tread of the tire by means of an ultrasonic sensor. With this type of measurement, it is only possible to detect the moment of the longitudinal deflection of the tire and the maximum deformation in the vertical direction. For example, the so-called "slip angle" of the tire, that is a lateral displacement of the tire contact surface with respect to the direction of travel, is not detectable Thus, the system provides only measured values for monitoring the tire air pressure, but no information about transverse accelerations suitable for the vehicle dynamics control systems.

DE 10 2006 001 297 A1 discloses, for example, a system in which a, attached to the rim inside the tire sensor element measures the distance to the inside of the tire and determines therefrom by means of suitable sensors, the vehicle longitudinal and lateral acceleration and these in relation to each other. The distance measurement such short distances, for example by laser beam, represents a very high demand on the measuring system, in particular the speed performance of the circuit when a sufficient measurement accuracy is sought, which can lead to very high costs. Furthermore, the inclusion of the longitudinal deformation for transverse deformation of the contact surface of the tire is not always meaningful in order to obtain a realistic image of the current driving situation from this information.

The WO 01/08908 A1 and WO 01/45968 A1 by the same assignee disclose a system which also measures the distance between a sensor fixed to the rim and the inside of the tire contact surface. Further, it discloses a method which uses a transmitted signal reflected from the inner surface of the tire. The rotating part of the measuring system transmits the measured signal wirelessly to a stationary part of the measuring system. The procedure Controls the handling of a vehicle by controlling the condition of its tires. Again, the costly Abstandsabtastung is used, which makes a costly electronics required. Furthermore, all distance measuring systems are inherently peculiar in that they can not detect relative displacement of the tire tread with respect to the rim where the detection system is seated, since a reference point is missing.

From the DE 199 37 078 A1 a measuring system is known, which by means of a rim on the inside of the tire arranged stationary sensor, the location displacements of a, arranged on the inside of the tire measuring point in two mutually perpendicular directions, the longitudinal and transverse direction, missing. Furthermore, a distance measurement between the sensor unit and the measuring point is additionally detected. In particular, the fact that only one reflection point is considered, it is only possible to obtain a comprehensive information about the deformation of the tire contact surface due to the application of compressed air, the loading condition and the driving dynamics effects. As sensor light beam elements or electromagnetically acting sensors are proposed. The additional distance detection requires the use of a parallel distance measuring system, which should increase the manufacturing costs and the susceptibility of the system.

Of the Invention is based on the object, the deformation of a tire of a vehicle in the area of contact with the roadway, from the recorded measured values a larger number determine differentiated tire and vehicle load parameters and to use for a suspension control and this cost-effective and reliable designs offer.

The The invention relates to a measuring arrangement for dynamically measuring the mechanical deformation of a pneumatic, mounted on a rim elastic tire in the contact area with the road with the in Preamble of claim 1 mentioned features. Such Measuring arrangement has, for example, at least one optical sensor element and at least one optical transmitting element on the rim fixedly arranged and with electrical energy over a wireless electromagnetic or slip ring device connected voltage source are supplied. Furthermore, the measuring arrangement at least one, opposite the inner surface of the tire the optical sensor element arranged, reflector and a wired or wireless signal transmission to an outside of the tire arranged receiver.

Thereby, the optical sensor element is a digital image recorder is and opposite to the inner surface of the tire the digital image capture device a variety regularly arranged reflector is formed, wherein the digital recording device Periodically in each case an overall picture of the plurality of reflectors detected, the objects of the present invention after a achieved first aspect of the invention.

Further preferred embodiments of the invention will become apparent from the others, in the subclaims mentioned features.

According to one preferred embodiment of the present invention is the, in the measuring arrangement for dynamically measuring the mechanical deformation a pneumatic rim-mounted elastic tire, periodic acquisition of the overall image of the plurality of reflectors permanent during one revolution of the rim with the tire executed.

According to one Another preferred embodiment of the present invention the regular arrangement of the individual reflectors at regular intervals from each other executed.

Farther Preferably, each of the reflectors is from the plurality of reflectors individually attached to the inner surface of the tire.

Prefers is the multitude of reflectors on a flexible film substrate arranged, which is attached to the inner surface of the tire is. As a result, the attachment of the plurality of reflectors on defined positions inside the tire much easier.

In In another preferred embodiment, the attachment is the Variety of reflectors on the inner surface of the tire executed by means of an adhesive.

Farther preferred is the, by the plurality of reflectors on the inside the tire covered area larger as the area of contact area with the roadway at the largest occurring deformation of the tire. As a result, the entire contact area is according to its respective Deformation state recorded.

The Variety of on the inner surface of the tire regularly arranged reflectors with respect to them opposite arranged on the rim digital image pickup device is according to a preferred embodiment of the present invention symmetrically arranged.

According to a further aspect of the present invention, the invention relates to a chassis gearing system for dynamically adjusting the chassis properties of a vehicle based on the detected in the contact area with the roadway deformation of a pneumatic tire. Such a chassis control system has at least one electronic control, which evaluates the detected deformation of the pneumatic tire and processes it into control signals. Further, the suspension control system is provided with a measuring arrangement for dynamically measuring the mechanical deformation of a pneumatic, mounted on at least one rim elastic tire in the contact area with the road having at least one optical sensor element and at least one optical transmitting element, which are fixedly arranged on the rim and are supplied with electrical energy via a wireless electromagnetic or via a slip ring device connected voltage source. In addition, a reflector is disposed on the inner surface of the tire opposite to the optical sensor element and a wired or wireless signal transmission to a arranged outside the tire receiver of an electronic control unit is present.

The Object of the present invention is characterized by this aspect achieved that the optical sensor element of the measuring arrangement a Digital image capture device is and on the inside surface of the tire relative to the digital image capture device Variety of regularly arranged reflectors formed is, wherein the digital recording device periodically captured an overall picture of the multitude of reflectors, and the electronic control means for evaluating the digital image capture device having captured image information.

According to one preferred embodiment of the present invention are in the Chassis control system for dynamic adjustment of chassis characteristics the means for evaluating, from the digital image capture device recorded image information executed as a program means, which are executed by a microprocessor system.

In Another preferred embodiment of the invention is with the Means for evaluating the from the digital image capture device captured image information, the contour shape of the contact area of the tire recognized with the roadway. The contour of the contact area can be in Limits of the loads caused by acceleration, braking or Side forces when cornering a much more accurate statement about the quality and quantity of occurring forces deliver, as that a single, according to the state of the art Can do point.

Farther preferred is in the chassis control system for dynamic adjustment the chassis characteristics of a vehicle with the means for evaluation the image information captured by the digital image capture device performed a comparison with at least one reference image. One or more reference images can be provided be in order, for example, a normal load condition in the state, a straight ahead, a full load condition or a defined Curve state for comparison with the acquired image information on Use the contact surface of the tire with the road surface to be able to.

In Another preferred embodiment is the distinction the spatial orientation of individual reflectors of the Variety of reflectors, with the means for evaluating, from the image acquisition information captured by the digital image capture device Brightness differences executed. The individual reflectors are aligned horizontally in the flat area of the contact surface and are at the transitions to the undeformed Areas of the tire, each one progressively larger Angle, with respect to the orientation of the digital imaging device, aligned. This reflects the horizontally arranged Reflectors and the angled reflectors position the light the optical transmitting element different, so that significant Brightness differences occur, which are used can, the outer contour of the contact area to recognize.

Farther preferred are with the means for evaluating the from the digital image capture device captured image information the distances between individual Reflectors of the plurality of reflectors determined. Change these distances due to the elasticity of the tire material due to the forces occurring, wherein after transverse and longitudinal forces can be distinguished.

additionally can in a further preferred embodiment of the present Invention, a compressed air sensor for detecting the air pressure in the tire be provided. This can be used to influence the loading of the vehicle and the tire pressure in the tire to distinguish and for further linked evaluations to use.

According to a preferred embodiment, at least one result of the signal processing of the chassis control system is provided to one or more of the active or passive chassis control systems, such as anti-lock braking system (ABS), traction control (ASR), adaptive cruise control (ACC), active differential lock, ESP, and the like. The performance of these known suspension control systems can be further increased by the invention more information about the contact surface of the tire, although these systems are already highly developed and almost no further improvement potential.

To Yet another aspect of the present invention is the invention from a method of dynamically measuring, on a pneumatic Tire in the contact area with the road surface, occurring longitudinally and lateral forces, which is a detection of the deformation of the pneumatic tire with a suspension control system for dynamic Adapting the chassis properties of a vehicle has. The Dynamic adjustment of the chassis properties is based on this the, in the contact area with the road, detected deformation of the pneumatic tire running. The chassis control system has at least one electronic control that detected the Evaluating deformation of the pneumatic tire and control signals processed. Furthermore, the suspension control system, as described above, a measuring arrangement for dynamically measuring the mechanical deformation a pneumatic tire with the features described above on.

To This further aspect of the present invention has the objects the invention with the following invention Steps reached, wherein in a first step a Image of a variety of reflectors using a digital imaging device is detected as image information. In a second step will be the shape and / or size parameters of the contact area of the tire with the roadway determined from the image information, and in a third step, the captured image information with at least compared to a reference image. In a fourth inventive Step is at least one manipulated variable for at least one chassis control system according to at least one case-related Calculation rule calculated. Finally, in a fifth Step the at least one calculated manipulated variable delivered to at least one suspension control system.

According to one preferred embodiment is by a detected shift the plurality of reflectors, with respect to the digital image capture device, transverse to the direction of travel occurring at the respective tire Transverse force with directional detection inwards or outwards determined.

Farther preferred is in the inventive method by a detected or determined displacement of the Variety of reflectors in the direction of travel, with respect to the digital image capture device, a longitudinal force occurring at the respective tire with Direction detection can be determined forwards or backwards. These Displacement in the longitudinal direction is a measure of with which acceleration or deceleration the vehicle accelerated or decelerated, and over the interim frictional forces occurring in the tire and the road surface.

In Another preferred embodiment is the area size the contact area of the tire with the roadway from the image information calculated and determined from it the vertical load in the tire. This allows the measurement of vertical load run the tire without distance measurements, respectively on the distance between contact surface and the rim conclusions to be able to pull, for example, the wear of a Tire to determine.

advantageously, are the distances between individual reflectors of the plurality of reflectors determined from the image information and their changes are differentiated by direction, and from this Accelerating, braking and centrifugal forces are calculated.

In In a preferred embodiment of the method, the distances become between individual reflectors of the plurality of reflectors and the respective speeds of these distance changes determined from the captured image information and distinguished by direction, from this the actual friction properties between the tire and the carriageway are calculated.

In Another preferred embodiment of the method upon each revolution of the tire, detection of the transverse edge of a executed with the plurality of reflectors formed reflector field and the position of this transverse edge, as well as the counting used the reflector rows following the transverse edge to the Center of the fully imaged contact area in the direction of the Tire or the position of another specified reference point to investigate.

According to one Another preferred embodiment of the method is at each revolution of the tire, a recognition of at least one longitudinal edge of the reflector field formed with the plurality of reflectors executed and the position of this edge, as well as the counting the, offset from the longitudinal edge arranged reflector columns used, around the middle of the fully mapped contact area across the direction of travel tire or other specified reference point. Both measures are used to determine the position of the detected Capture contact surface with respect to the rim.

According to another aspect of the present invention, the objects of the invention with a suspension control system for adjusting the driving characteristics of a vehicle, depending on detected driving parameters and characteristics are met by the fact that, in addition to other detected Parame In addition, at least one, calculated according to the above method according to the invention, control variable detected and used to adjust the driving characteristics.

According to one preferred embodiment is the invention Vehicle control system one or more of an antilock braking system ABS, Anti-slip ASR, Adaptive Cruise Control ACC, Active Differential lock, ESP and the like.

In Another preferred embodiment of the present invention Invention, the vehicle has at least one tire on a rim, with the measuring arrangement according to one of the above preferred embodiments on.

The Invention will be described below in embodiments the accompanying drawings explained. Show it:

1 a schematic cross section through a, mounted on a rim, tire with a measuring arrangement according to the invention and

2 a schematically illustrated plan view of an inventive reflector field formed from a plurality of reflectors.

1 shows a schematic cross section through a, on a rim 50 mounted tires 10 with a measuring arrangement according to the invention, which has a plurality on the inner surface of the tire 10 mounted reflectors 20 , a light source 30 , a digital image recorder 40 , a data transmission unit 60 , a preferably wireless transmission link 70 and an electronic control 80 having.

The light source 30 sends directional light 31 For example, in the visible or infrared spectrum range, and is of the individual reflectors 20 as back-reflected light 32 back to the digital image recorder 40 thrown where periodically during one revolution of the tire 10 Pictures are captured. A power source (not shown) powers the light source 30 , the digital image recorder 40 and the data transmission unit 60 with electrical energy. For example, this can be done conventionally by an electromagnetic energy converter that controls the mechanical rotational energy of the rim 50 is converted into electrical energy with respect to the wheel hub (not shown), or by a sliding ring with sliding contacts. The ordinate labeled Z represents the vertical direction of the load effect due to the weight of the vehicle and dynamic inertia effects due to road bumps. The direction of the force of movement Y indicates the direction of action of the transverse forces that occur, for example, when cornering.

2 shows a schematic plan view of a, from a plurality of reflectors 90 ₁₁ to 9N _mn formed, inventive reflector field 20 , In this preferred embodiment of the present invention, the individual reflectors are equally spaced from each other.

The Y direction of force also indicates the direction of action here the lateral forces that occur when cornering and the ordinate direction designated X indicates the direction of travel.

Preferably, that is, from a plurality of reflectors 90 ₁₁ to 9N _mn formed, inventive reflector field 20 a longitudinally formed in the direction of travel X rectangle. Alternatively, however, any other, preferably regular, arrangements of the individual reflectors are possible.

Thus the shift of the reflector field 20 in the transverse direction Y and in the longitudinal direction X with respect to the rim mounted digital image pickup device 40 can be detected, in a preferred embodiment of the present invention, at least one of the edges of the reflector field 20 in the electronic control 80 be recorded. For the direction X, it may preferably be in the running direction first in the contact region of the tire 10 incoming transverse edge 901 be, with which the beginning of the reflector field 20 is detected and possibly its displacement in relation to the rim 50 as a result of acceleration or deceleration can be determined.

For the transverse direction Y, it may preferably be at least one of the longitudinal edges 902 . 903 be, with the Y-position of the reflector field 20 in terms of the rim 50 is detected and possibly its displacement in relation to the rim 50 , as a result of a lateral force, or lateral acceleration is detected.

The previous embodiments of the present invention are by way of example only, and not to be construed as limiting the present invention. The present invention can easily be applied to other applications become. The description of the embodiment is by way of illustration provided and not to the scope of the claims limit. Many alternatives, modifications and Variants are obvious to one of ordinary skill in the art without that he is the scope of the present invention would have to leave the, in the following claims is defined.

10

tires

102

tire side Left

103

tire side right

20

reflector panel

30

Light source optical transmission element

31

sent out light

32

reflected light

40

Digital imaging device

50

rim

60

Data transfer unit

70

transmission path

80

electronic Control, microprocessor system

90 ₁₁ -9N _mn

multitude the reflectors

901

first Reflectors Series

902

left Reflectors column

903

right Reflectors column

X

direction of travel, longitudinal direction

Y

Shear direction transversely

Z

vertical Direction of load effect

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 19744611 A1 [0005]
• - DE 102006001297 A1 [0006]
• WO 01/08908 A1 [0007]
• WO 01/45968 A1 [0007]
• - DE 19937078 A1 [0008]

Claims (27)

Measuring arrangement for dynamically measuring the mechanical deformation of a pneumatic, on a rim ( 50 ) mounted, elastic tire ( 10 ) in the contact region with the roadway, comprising at least one optical sensor element and at least one optical transmitting element ( 30 ) on the rim ( 50 ) are fixedly arranged and supplied with electrical energy via a wireless electromagnetic or slip-ring connected voltage source, and at least one, on the inner surface of the tire ( 10 ) arranged opposite the optical sensor element, reflector ( 20 ) and a wired or wireless signal transmission ( 70 ) to one outside the tire ( 10 ) arranged receiver of an electronic control ( 80 ), characterized in that the optical sensor element is a digital image recorder ( 40 ) and on the inner surface of the tire ( 10 ) relative to the digital image capture device ( 40 ) a plurality of regularly arranged reflectors ( 20 . 90 ₁₁ - 9N _mn ), wherein the digital recording device ( 40 ) Periodically each an overall picture of the plurality of reflectors ( 20 . 90 ₁₁ - 9N _mn ) detected. Measuring arrangement according to claim 1, characterized in that the periodic detection of the overall image of the plurality of reflectors ( 20 . 90 ₁₁ - 9N _mn ) during one revolution of the rim ( 50 ) with the tire ( 10 ) is permanently executed. Measuring arrangement according to one of the preceding claims, characterized in that the regular arrangement of the individual reflectors ( 90 ₁₁ - 9N _mn ) is carried out at regular intervals from each other. Measuring arrangement according to one of the preceding claims, characterized in that each of the reflectors ( 90 ₁₁ - 9N _mn ) of the plurality of reflectors individually on the inner surface of the tire ( 10 ) is attached. Measuring arrangement according to one of the preceding claims 1 to 3, characterized in that the plurality of reflectors ( 90 ₁₁ - 9N _mn ) is arranged on a flexible film substrate which is attached to the inner surface of the tire ( 10 ) is attached. Measuring arrangement according to claim 4 or 5, characterized in that the attachment of the plurality of reflectors ( 90 ₁₁ - 9N _mn ) on the inner surface of the tire ( 10 ) is performed by means of an adhesive. Measuring arrangement according to one of the preceding claims, characterized in that, by the plurality of reflectors ( 90 ₁₁ - 9N _mn ) on the inside of the tire ( 10 ), area greater than the area of the contact area with the road at the largest occurring deformation of the tire ( 10 ). Measuring arrangement according to one of the preceding claims, characterized in that the plurality of on the inner surface of the tire ( 10 ) regularly arranged reflectors ( 90 ₁₁ - 9N _mn ) with respect to the rim ( 50 ) arranged digital image recording device ( 40 ) is arranged symmetrically. Chassis control system for dynamically adapting the chassis properties of a vehicle based on the deformation of a pneumatic tire detected in the area of contact with the roadway ( 10 ), comprising at least one electronic controller ( 80 ), which detects the detected deformation of the pneumatic tire ( 10 ) and processed into control signals and with a measuring arrangement for dynamically measuring the mechanical deformation of a pneumatic, on at least one rim ( 50 ) mounted elastic tire ( 10 ) in the contact region with the roadway, comprising at least one optical sensor element and at least one optical transmitting element ( 30 ) on the rim ( 50 ) are fixed and are supplied with electrical power via a wireless electromagnetic or slip-ring connected voltage source, and at least one on the inner surface of the tire ( 10 ) arranged opposite the optical sensor element reflector ( 90 ₁₁ - 9N _mn ) and a wired or wireless signal transmission to an outside of the tire ( 10 ) arranged receiver of an electronic control ( 80 ), characterized in that the optical sensor element of the measuring arrangement comprises a digital image recorder ( 40 ) and on the inner surface of the tire ( 10 ) relative to the digital image capture device ( 40 ) a plurality of regularly arranged reflectors ( 90 ₁₁ - 9N _mn ), wherein the digital recording device ( 40 ) periodically captures an overall image of the plurality of reflectors, and the electronic controller ( 80 ) Means for evaluating, from the digital image capture device ( 40 ), having image information. Chassis control system according to claim 9, characterized in that the means for evaluating, from the digital image recorder ( 40 ), image information is executed as program means which are generated by a microprocessor system ( 80 ). Chassis control system according to one of claims 9 to 10, characterized in that the means for evaluating, from the digital image recording device ( 40 ), image information the Contour shape of the contact area of the tire ( 10 ) is detected with the roadway. Chassis control system according to one of claims 9 to 11, characterized in that the means for evaluating, from the digital image recording device ( 40 ), image information is compared with at least one reference image. Chassis control system according to one of claims 9 to 12, characterized in that the distinction of the spatial orientation of individual reflectors ( 90 ₁₁ - 9N _mn ) of the plurality of reflectors with the means for evaluating the, from the digital image capture device ( 40 ), image information is performed by brightness differences. Chassis control system according to one of claims 9 to 13, characterized in that the means for evaluating, from the digital image recorder ( 40 ), image information captured the distances between individual reflectors ( 90 ₁₁ - 9N _mn ) of the plurality of reflectors are determined. Chassis control system according to one of claims 9 to 14, characterized in that in addition a compressed air sensor for detecting the air pressure in the tire ( 10 ) is provided. Chassis control system according to one of the claims 9 to 15, characterized in that at least one result of Signal processing of the chassis control system to one or more from active or passive suspension control systems, such as anti-lock braking system (ABS), traction control (ASR), Adaptive Cruise Control (ACC), active differential lock, ESP and the like. Method for dynamically measuring, on a pneumatic tire ( 10 ) occurring in the contact region with the roadway, longitudinal and lateral forces, comprising detecting the deformation of the pneumatic tire ( 10 ) with a chassis control system for dynamically adapting the chassis properties of a vehicle on the basis of the deformation of a pneumatic tire detected in the area of contact with the roadway ( 10 ), comprising at least one electronic control which detects the detected deformation of the pneumatic tire ( 10 ) and processed into control signals and with a measuring arrangement for dynamically measuring the mechanical deformation of a pneumatic, on at least one rim ( 50 ) mounted elastic tire ( 10 ) in the contact region with the roadway, comprising at least one optical sensor element and at least one optical transmitting element ( 30 ) on the rim ( 50 ) are fixed and are supplied with electrical power via a wireless electromagnetic or slip-ring connected voltage source, and at least one on the inner surface of the tire ( 10 ) arranged opposite the optical sensor element reflector and a wired or wireless signal transmission to an outside of the tire ( 10 ) arranged receiver of an electronic control ( 80 ), characterized in that - in a first step, an image of a plurality of reflectors, by means of a digital image recording device ( 40 ) is detected as image information, - in a second step, the shape and / or size parameters of the contact area of the tire ( 10 ) are determined with the road from the image information, - in a third step, the detected image information is compared with at least one reference image, - in a fourth step at least one manipulated variable for at least one chassis control system is calculated according to at least one case-related calculation rule, and - in a fifth Step, the at least one calculated control variable is supplied to at least one chassis control system. A method according to claim 17, characterized in that by the detected displacement of the plurality of reflectors ( 90 ₁₁ - 9N _mn ), with respect to the digital image capture device ( 40 ), transverse to the direction of travel one on the respective tire ( 10 ) occurring lateral force with directional detection is determined inward or outward. Method according to one of claims 17 to 18, characterized in that by the detected displacement of the plurality of reflectors ( 90 ₁₁ - 9N _mn ) in the direction of travel, with respect to the digital image recorder ( 40 ), one on the respective tire ( 10 ) occurring longitudinal force with direction detection forwards or backwards is determined. Method according to one of claims 17 to 19, characterized in that the area size of the contact area of the tire ( 10 ) calculated with the roadway from the image information and from it the vertical load in the tire ( 10 ) is determined. Method according to one of claims 17 to 20, characterized in that the distances between individual reflectors ( 90 ₁₁ - 9N _mn ) are determined from the plurality of reflectors from the image information and their changes are distinguished by direction, from which acceleration, braking and centrifugal forces are calculated. Method according to one of claims 17 to 21, characterized in that the distances between individual reflectors of the plurality of reflectors ( 90 ₁₁ - 9N _mn ) determined from the image information and the respective speeds of these changes in distance are determined and distinguished according to direction, from which the actual friction properties between the tire ( 10 ) and the road surface are calculated. Method according to one of claims 17 to 22, characterized in that at each revolution of the tire ( 10 ) a detection of a transverse edge ( 901 ) one, with the plurality of reflectors ( 90 ₁₁ - 9N _mn ), formed reflector field ( 20 ) and the position of this transverse edge ( 901 ), as well as the counting of the rows of reflectors following the transverse edge, is used to determine the center of the contact region imaged in the running direction of the tire ( 10 ) or another specified reference point. Method according to one of claims 17 to 23, characterized in that at each revolution of the tire ( 10 ) a recognition of the at least one longitudinal edge ( 902 . 903 ) one with the plurality of reflectors ( 90 ₁₁ - 9N _mn ) formed reflector field ( 20 ) and the position of this longitudinal edge ( 902 . 903 ), as well as the counting of, from the longitudinal edge ( 902 . 903 ) arranged offset, reflector columns is used to the center of the image-formed contact area transverse to the running direction of the tire ( 10 ) or another specified reference point. Chassis control system for adjusting the driving characteristics of a vehicle as a function of detected driving parameters and properties, characterized in that, among other detected Parameters additionally at least one, according to the method according to any one of claims 17 to 24 calculated, manipulated variable recorded and used to customize the driving characteristics. Chassis control system according to claim 25, characterized in that that the vehicle control system one or more of an antilock braking system (ABS), traction control (ASR), Adaptive Cruise Control (ACC), active differential lock, ESP and the like. Chassis control system according to one of claims 25 or 26, characterized in that the vehicle has at least one tire ( 10 ) on a rim ( 50 ) with the measuring arrangement according to one of claims 1 to 8.