DE102020203139A1 - Sensor device for sensing a torsion of a torsion element for an electromechanical roll stabilization device for a vehicle, torsion device and electromechanical roll stabilization system - Google Patents

Abstract

The present approach relates to a sensor device (100) for sensing a torsion of a torsion element (1905) for an electromechanical roll stabilization device for a vehicle. The sensor device (100) has a first circuit board (105) and a second circuit board (110). The first circuit board (105) is arranged on the torsion element (1905) and has a first electrode (A), a second electrode (B), a third electrode (C) and a fourth electrode (D). The second plate (110) is arranged on the torsion element (1905) and has a first counter electrode (130) and a second counter electrode (135), the first electrode (A) and the first counter electrode (130) forming a first capacitor, the second electrode (B) and the second counter electrode (135) form a second capacitor, the third electrode (C) and the second counter electrode (135) form a third capacitor and the fourth electrode (D) and the first counter electrode (130) form one Form fourth capacitor.

Description

The present approach relates to a sensor device for sensing a torsion of a torsion element for an electromechanical roll stabilization device for a vehicle, a torsion device with a sensor device and an electromechanical roll stabilization system with a sensor device.

One possibility of torque measurement is the measurement of a torsion, twisting or twisting of a deformable deformation body, for example a Hook body. Various methods are known for measuring torque.

Against this background, the present approach creates an improved sensor device for sensing a torsion of a torsion element for an electromechanical roll stabilization device for a vehicle, a torsion device with an improved sensor device and an electromechanical roll stabilization system with an improved sensor device. Advantageous refinements result from the subclaims and the following description.

The advantages that can be achieved with the approach presented are that a sensor device is created which is designed to sense the smallest angles of a deformation of a torsion element deformed by torsion. In this way, a reliable measurement result can be achieved, even if the torsion element is very stiff relative to the acting torque.

A sensor device for sensing a torsion of a torsion element for an electromechanical roll stabilization device for a vehicle has a first board, a second board, an input interface and an output interface. The first circuit board is arranged or can be arranged on the torsion element and has a first electrode with a plurality of fingers, a second electrode with a plurality of fingers, a third electrode with a plurality of fingers and a fourth electrode with a plurality of fingers. The second plate is arranged or can be arranged on the torsion element and has a first counter electrode with a plurality of fingers and a second counter electrode with a plurality of fingers, the first electrode and the first counter electrode being arranged opposite one another and forming a first capacitor, the The second electrode and the second counter electrode are arranged opposite one another and form a second capacitor, the third electrode and the second counter electrode being arranged opposite one another and forming a third capacitor, the fourth electrode and the first counter electrode being arranged opposite one another and forming a fourth capacitor, wherein the second electrode and the fourth electrode are electrically connected to each other. The input interface is designed to provide an excitation voltage generated by a generator to at least one of the electrodes. The output interface is designed to provide an evaluation voltage that is dependent on a relative position of the first board with respect to the second board that can be brought about by the torsion.

An electromechanical roll stabilization, or "ERC" for short, which can be brought about by the electromechanical roll stabilization device, works as follows: Active electromechanical roll stabilizations generate stabilization moments on a front and an additional or alternatively rear axle of the vehicle when cornering, so that the Vehicle structure is minimized or eliminated entirely. In addition, an optimal steering and load change behavior is generated. When driving straight ahead, on the other hand, an electronic control adjusts the damping level and ensures a softer, more comfortable response from the suspension. A copy movement of the body is reduced, giving the vehicle a high level of agility and accuracy over the entire speed range. The electric actuator can also be used in mid-range and upper-class vehicles with hybrid or electric drives

The torsion element can be a part suitable for power transmission. For example, the deformation element can be part of the electromechanical roll stabilization device. The torsion element can be part of an ERC actuator. For example, the torsion element can be a shaft, a hollow shaft or a housing of the electromechanical roll stabilization device. The sensor device can now serve to detect the biaxial deformation of the torsion element during operation of the electromechanical roll stabilization device, for example a shear strain or torsion of the torsion element, and thus an applied torque of the vehicle in order, for example, to enable correct control of the electromechanical roll stabilization device to stabilize the vehicle . In this case, the sensor device is advantageously designed to carry out the measurement of the smallest changes in angle, for example with the aid of a differential capacitor arrangement and an alternating current measuring bridge, also called a “Wheatstone alternating current measuring bridge”. The sensor device requires only a few and inexpensive components and is therefore economically interesting.

A first connection of the input interface can be connected to the first electrode and a second connection of the input interface can be connected to the third electrode. For example, the first connection of the input interface can be directly connected to the first electrode and the second connection of the input interface can be directly connected to the third electrode. In this way, the first electrode and fourth electrode can be supplied with electrical energy, for example an alternating voltage. The second electrode and fourth electrode can, for example, be connected in series between the first electrode and the third electrode.

It is also advantageous if the sensor device has an evaluation device that is electrically connected to the output interface, the evaluation device being designed to use the evaluation voltage to generate a torsion signal that represents a torsion value of the torsion of the torsion element. This enables the torsion to be measured. At least one connection of the evaluation device can be contacted here with the output interface contacted between the second electrode and the fourth electrode.

The sensor device can also have the generator for generating the excitation voltage, the generator being electrically connected to that of the input interface. The generator can be designed, for example, as an alternating voltage source or alternating current source.

The fingers of the first, second, third and additionally or alternatively fourth electrode can extend in one plane and, additionally or alternatively, the fingers of the first counter-electrodes and second counter-electrodes can extend in a further plane. The plane and the further plane can differ from one another and / or be arranged parallel to one another. In this way, four functional differential capacitors can be implemented.

According to one embodiment, the first circuit board and the second circuit board can furthermore be aligned parallel or concentrically to one another. In a parallel variant, the sensor device can be designed in the form of a plate, that is to say in the form of two plates arranged one above the other. In a concentric variant, on the other hand, the sensor device can, for example, have a cylindrical shape, for example with an inner and a circumferential outer hollow section. This creates different possibilities for receiving the sensor device on the torsion element. Regardless of the embodiment, the first plate can be connected to a first section of the torsion element and the second plate can be connected to a second section of the torsion element. In this way, a relative movement between the first section and the second section of the torsion element can be sensed via the sensor device.

It is also advantageous if, according to one embodiment, the fingers of the first electrode and fourth electrode are arranged in alignment or parallel to one another, the fingers of the second electrode and third electrode being arranged in alignment or parallel to one another. In this way, a good capacitor effect can be achieved.

The fingers of the first electrode and the second electrode can be arranged at an angle to one another. The fingers of the first counter-electrode and the second counter-electrode can be arranged in alignment or parallel to one another. With an intentional incorrect angle generated in this way, even the slightest torsion can be detected, since an individual and easily assignable evaluation voltage is generated depending on the torsion that takes place. All that is required for this is a small error angle of, for example, less than five degrees.

The sensor device can also have a further output interface for outputting a reference voltage for evaluating the evaluation voltage, for example the further output interface being electrically contacted via a first resistor to the first connection of the input interface and additionally or alternatively via a second resistor to the second connection of the input interface is contacted, wherein the evaluation device is designed to generate the torsion signal using the reference voltage. The further output interface can be contacted with a further connection of the evaluation device, for example directly. This enables the torsion signal to be verified.

The first electrode and the third electrode can be structurally identical and additionally or alternatively rotated to one another and additionally or alternatively diagonally opposite and additionally or alternatively the second electrode and the fourth electrode can be structurally identical and additionally or alternatively rotated 180 degrees to one another and additionally or alternatively diagonally be arranged opposite one another. In this case, the first electrode and the third electrode can be arranged rotated by 180 degrees with respect to one another and the second electrode and the fourth electrode can be arranged rotated by 180 degrees with respect to one another. So a simple, compact, For example, a symmetrical structure of the first board can be realized.

It is also advantageous if the first electrode, second electrode, third electrode and fourth electrode are shaped like a segment of a circle and, additionally or alternatively, the first counterelectrode and second counterelectrode are shaped like a segment of a circle. For example, the first electrode, second electrode, third electrode and fourth electrode can each be shaped in the shape of a quarter circle segment in order to ideally utilize a structural space on the circuit board. The fingers of the electrodes can each extend away from an arcuate section of the individual electrodes that is bent in the shape of a quarter circle. The first counter-electrode and the second counter-electrode can each be shaped like a semicircle segment. The fingers of the counter-electrodes can each extend from a centrally arranged connecting web to two opposite sides.

A torsion device has a torsion element and one of the sensor devices presented above, the first board being connected to a first section of the torsion element and additionally or alternatively the second board being connected to a second section of the torsion element in order to control the torsion between the sections of the torsion element to sense. In such a torsion device, thanks to the sensor device, reliable sensing of even a slight torsion of a torsion element is made possible.

The torsion element can be formed as a hollow shaft with a web that is connected to the first section and a suspension that is connected to the second section, the suspension having a receiving area and the sensor device being received between the receiving area and the web is. In such a variant, the sensor device can be received in a protected manner in the hollow shaft.

The receiving area can be arranged on a longitudinal axis of the torsion element or offset from the longitudinal axis or in a circle around the longitudinal axis. A particularly stable mounting of the sensor device in the hollow shaft can be implemented on the longitudinal axis or in a circular manner around the longitudinal axis. Depending on the installation space available, however, an arrangement of the sensor device offset with respect to the longitudinal axis can also be useful.

According to one embodiment, the sensor device can be accommodated in the form of a plate between the receiving area and the web or, according to a further embodiment, the sensor device can be arranged concentrically around the receiving area of the suspension or in the receiving area. In the concentric variant, the sensor device can be fastened in the shape of a cylinder around a suspension end section or in the suspension end section.

An electromechanical roll stabilization system for a vehicle with an electromechanical roll stabilization device and a sensor device is also presented, which is formed in one of the variants described above. Such an electromechanical roll stabilization system also realizes the advantages described above thanks to the sensor device.

• 1 eine schematische Aufsicht auf eine Sensorvorrichtung zum Sensieren einer Torsion eines Torsionselements für eine elektromechanische Wankstabilisierungseinrichtung für ein Fahrzeug gemäß einem Ausführungsbeispiel;
• 2 einen seitlichen Querschnitt einer Sensorvorrichtung gemäß einem Ausführungsbeispiel;
• 3 ein Schaltbild einer Sensorvorrichtung gemäß einem Ausführungsbeispiel;
• 4 bis 18 je eine schematische Aufsicht auf eine Sensorvorrichtung gemäß einem Ausführungsbeispiel;
• 19 bis 21 je einen seitlichen Querschnitt einer Torsionsvorrichtung mit einer Sensorvorrichtung gemäß einem Ausführungsbeispiel;
• 22 bis 24 je einen seitlichen Querschnitt eines Ausschnitts einer Torsionsvorrichtung mit einer Sensorvorrichtung gemäß einem Ausführungsbeispiel; und
• 25 eine schematische Querschnittsdarstellung eines Fahrzeugs mit einem elektromechanischen Wankstabilisierungssystem mit einer Sensorvorrichtung gemäß einem Ausführungsbeispiel.

Embodiments of the approach presented here are shown in the drawings and explained in more detail in the description below. It shows:

• 1 a schematic plan view of a sensor device for sensing a torsion of a torsion element for an electromechanical roll stabilization device for a vehicle according to an embodiment;
• 2 a lateral cross section of a sensor device according to an embodiment;
• 3 a circuit diagram of a sensor device according to an embodiment;
• 4th until 18th each a schematic plan view of a sensor device according to an embodiment;
• 19th until 21 each a lateral cross section of a torsion device with a sensor device according to an embodiment;
• 22nd until 24 each a lateral cross section of a section of a torsion device with a sensor device according to an embodiment; and
• 25th a schematic cross-sectional illustration of a vehicle with an electromechanical roll stabilization system with a sensor device according to an embodiment.

In the following description of preferred exemplary embodiments of the present approach, the same or similar reference numerals are used for the elements shown in the various figures and having a similar effect, a repeated description of these elements being dispensed with.

1 shows a schematic plan view of a sensor device 100 for sensing a torsion of a torsion element for an electromechanical roll stabilization device for a vehicle according to an exemplary embodiment. the Sensor device 100 has a first board 105 , a second board 110 , an input interface 115 and an output interface 120 on.

The first board 105 can be arranged on the torsion element and has a first electrode A. with a plurality of fingers 125 , a second electrode B. with a plurality of fingers 125 , a third electrode C. with a plurality of fingers 125 and a fourth electrode D. with a plurality of fingers 125 on.

The second board 110 can be arranged on the torsion element and has a first counter electrode 130 with a plurality of fingers 125 and a second counter electrode 135 with a plurality of fingers 125 on.

The first electrode is ready for operation A. and the first counter electrode 130 arranged opposite and form a first capacitor. The second electrode is similar B. and the second counter electrode 135 arranged opposite and form a second capacitor. The third electrode C. and the second counter electrode 135 are arranged opposite one another and form a third capacitor. The fourth electrode D. and the first counter electrode 130 are arranged opposite one another and form a fourth capacitor.

According to one embodiment, the second electrode B. and the fourth electrode D. electrically connected to each other.

The input interface 115 is for providing an excitation voltage generated by a generator to at least one of the electrodes A. , B. , C. , D. educated. The output interface 120 is for providing a relative position of the first plate that can be brought about by the torsion 105 opposite the second board 110 Dependent evaluation voltage formed.

The first circuit board is only for the sake of clarity 105 and the second board 110 shown here arranged side by side. The circuit boards are ready for operation 105 , 110 for forming the four capacitors described above one above the other, for example stacked and / or arranged parallel to one another. Depending on the embodiment, the boards 105 , 110 be flat or curved.

The finger 125 the first electrode A. and fourth electrode D. are arranged in alignment or parallel to one another according to this exemplary embodiment, with the fingers 125 the second electrode B. and third electrode C. are arranged in alignment or parallel to one another according to this exemplary embodiment. The finger 125 the first electrode A. and second electrode B. are arranged obliquely to each other according to this embodiment. The finger 125 the first counter electrode 130 and second counter electrode 135 are arranged in alignment or parallel to one another according to this exemplary embodiment. A mistake α between the fingers 125 the first electrode A. and second electrode B. according to this exemplary embodiment is less than 5 degrees. The wrong angle α also runs between the fingers 125 the fourth electrode D. and third electrode C. .

The first electrode A. and the third electrode C. are structurally identical and / or rotated to one another and / or arranged diagonally opposite and / or the second electrode according to this exemplary embodiment B. and the fourth electrode D. are structurally identical and / or rotated with respect to one another and / or arranged diagonally opposite one another according to this exemplary embodiment. Here, according to this exemplary embodiment, are the first electrode A. and the third electrode C. rotated 180 degrees to each other and the second electrode B. and the fourth electrode C. arranged rotated by 180 degrees to each other.

The first electrode A. , second electrode B. , third electrode C. and fourth electrode D. are formed in the shape of a segment of a circle according to one embodiment. The first counter electrode 130 and second counter electrode 135 are formed in the shape of a segment of a circle according to one embodiment.

According to this embodiment, the first electrode A. , second electrode B. , third electrode C. and fourth electrode D. each formed in the shape of a quarter circle. The finger 125 of the electrodes A. , B. , C. , D. In this case, according to this exemplary embodiment, each extend from an arcuate section that is bent in the shape of a quarter circle 140 of the individual electrodes A. , B. , C. , D. path. The first counter electrode 130 and second counter electrode 135 are formed according to this embodiment, each semicircular segment-shaped. The finger 125 of the counter electrodes 130 , 135 In this case, according to this exemplary embodiment, each extend from a centrally arranged connecting web 145 on two opposite sides.

The present sensor device 100 enables a measurement of the smallest angle changes with the help of a differential capacitor arrangement and optionally an alternating current measuring bridge, for example a Wheatstone alternating current measuring bridge, see also 3 . The sensor device is required for this 100 advantageously only a few and inexpensive components. Only the relative orientation of the measuring structures to one another in the zero position during their assembly requires a certain precision, which, however, according to an exemplary embodiment can be achieved by mechanical alignment elements or an active alignment using the measurement signal itself. The circuit boards shown here next to one another are ready for operation 105 , 110 as in 2 shown facing each other or as in 22nd Arranged concentrically and thus form surface capacitors. According to one embodiment, the first board 105 realizes an active structure with the electrodes A. , B. , C. and D. and the second board 110 a passive structure 110 with the counter electrodes 130 , 135 which with the electrodes A. , B. , C. and D. facing each other in the starting position are arranged parallel to each other. An in 2 visible gap between the electrodes A. , B. , C. and D. and counter electrodes 130 , 135 is, according to an embodiment, filled with air or a dielectric, for example with a higher dielectric constant than air. In an advantageous embodiment, the dielectric is an elastic body or a gel which, when connected to both surfaces, acts as a dielectric and / or prevents the penetration of other media. According to an alternative embodiment, a filling with a liquid is realized, which is held in the gap with an elastic membrane or seal. The two structures can be moved relative to one another when they are ready for operation. The structures are on your surface, i.e. the counter electrodes 130 , 135 as well as electrodes A. , B. , C. and D. designed in such a way that a change in distance, displacements parallel to the plane and tilts in a first approximation do not change the differential capacitance / difference in the capacities of the two branches of the measuring bridge according to 3 result. A twist, however, if the electrodes are designed accordingly A. until D. with the little wrong angle α in particular also small angles smaller than the incorrect angle shown here α , creates a detuning of the bridge and thus a signal proportional to the rotation.

2 shows a side cross section of a sensor device 100 according to an embodiment. This can be the in 1 sensor device described 100 act, according to this embodiment in an operational state with the boards 105 , 110 is arranged centrally one above the other.

According to this embodiment, the first board 105 and the second board 110 aligned parallel to each other. The sensor device 100 , which can also be referred to as a "rotation angle-sensitive differential capacitor" is structured as follows: The second circuit board 110 is formed according to an embodiment as a passive board, with the two counter electrodes 130 , 135 in the form of surface contacts. The first board 105 is shaped as an active board with the four electrodes A. , B. , C. , D. in the form of four surface contacts, their contacts A. and D. as B. and C. in each case parallel but against each other by the small error angle α are inclined. The electrodes A. and D. shape with the first counter electrode 130 as well as the electrodes B. and C. with the second counter electrode 135 two capacitors connected in series, the total capacitance of which is influenced by the relative position to one another. The two boards 105 , 110 in the form of substrates are for this purpose according to this embodiment through the small gap 200 separated from each other. This gap 200 is filled with air according to one exemplary embodiment or — which is advantageous for increasing the capacitance values — by means of a dielectric according to another exemplary embodiment. According to one embodiment, the dielectric is a plastically elastic substance, a gel or a liquid, which moves between the boards 105 , 110 which can also be referred to as “plates”, but prevents the ingress of foreign bodies. According to one exemplary embodiment, the two capacitor systems are electrically connected in series to form a half-bridge, the bridge signal of which, for example, with an in 3 described circuit can be evaluated.

3 shows a circuit diagram of a sensor device 100 according to an embodiment. This can be the in 1 or 2 sensor device described 100 Act.

A first connection 300 according to this exemplary embodiment, the input interface is with the first electrode A. connected and a second port 305 the input interface with the third electrode C. tied together. According to this embodiment, the first port is 300 the input interface with the first electrode A. directly connected and the second port 305 the input interface with the third electrode C. directly connected. The second electrode B. and fourth electrode D. are in accordance with this exemplary embodiment directly with one another and with the output interface 120 tied together. This way the four are through the electrodes A. , B. , C. , D. and the respective counter electrodes formed capacitors in series between the terminals 300 , 305 switched to the input interface.

The sensor device 100 According to this exemplary embodiment, optionally has an evaluation device 310 on that electrically to the output interface 120 connected is. The evaluation device 310 is designed to use the evaluation voltage 315 a torsion signal U _B to generate which represents a torsion value of the torsion of the torsion element. One connection 320 the evaluation device 310 is according to this embodiment with the second electrode B. and the fourth electrode D. contacted Output interface 120 tied together. According to one embodiment, the evaluation device 310 designed to the torsion signal U _B by comparing the evaluation voltage 315 to generate with a reference value, for example a reference voltage

The sensor device 100 According to this exemplary embodiment, optionally has the generator 325 to generate the excitation voltage, the generator 325 is electrically connected to that of the input interface.

The sensor device 100 furthermore, according to this exemplary embodiment, has a further output interface 330 for outputting a reference voltage 333 for evaluating the evaluation voltage 315 on. The further output interface 330 is an example of a first resistance 335 with the first connection 300 electrically contacted the input interface and via a second resistor 340 with the second connection 305 electrically contacted the input interface. The evaluation device 310 is designed to use the reference voltage 333 the torsion signal U _B to create. The further output interface 330 is according to this embodiment with a further connection 345 the evaluation device 310 contacted, for example directly.

For example, the evaluation device 310 realized as operational amplifier, differential amplifier or comparator.

According to one embodiment, the sensor device comprises 100 thus a differential capacitor arrangement and a bridge circuit for evaluating the differential capacitor arrangement. According to one embodiment, the evaluation device 310 built as a bridge amplifier in the form of a lock-in circuit in order to be sensitive only to the excitation frequency and to block out all other frequencies.

4th shows a schematic plan view of a sensor device 100 according to an embodiment. This can be the in 2 or 3 sensor device described 100 act in the operational state in a rest position of the torsion element. The first board 105 and the second board 110 are arranged centrally one above the other. According to this exemplary embodiment, the first circuit board faces the viewer 105 and behind it is the second board 110 arranged. An outside diameter of the first board 105 is, according to this exemplary embodiment, slightly smaller than an outer diameter of the second plate 110 .

5 shows a schematic plan view of a sensor device 100 according to an embodiment. This can be the in 4th sensor device described 100 act, with the difference that the first board is arranged opposite the second board moved to the left.

6th shows a schematic plan view of a sensor device 100 according to an embodiment. This can be the in 4th sensor device described 100 act, with the difference that the first board is arranged opposite the second board moved to the right.

7th shows a schematic plan view of a sensor device 100 according to an embodiment. This can be the in 4th sensor device described 100 act, with the difference that the first board is arranged rotated to the right in relation to the second board.

8th shows a schematic plan view of a sensor device 100 according to an embodiment. This can be the in 5 sensor device described 100 act, with the difference that the first board is arranged rotated to the right in relation to the second board.

9 shows a schematic plan view of a sensor device 100 according to an embodiment. This can be the in 6th sensor device described 100 act, with the difference that the first board is arranged rotated to the right in relation to the second board.

10 shows a schematic plan view of a sensor device 100 according to an embodiment. This can be the in 7th sensor device described 100 act, with the difference that the first board opposite the second board is arranged moved upwards, that is to say towards the viewer.

11 shows a schematic plan view of a sensor device 100 according to an embodiment. This can be the in 8th sensor device described 100 act, with the difference that the first board opposite the second board is arranged moved upwards, that is to say towards the viewer.

12th shows a schematic plan view of a sensor device 100 according to an embodiment. This can be the in 9 sensor device described 100 act, with the difference that the first board opposite the second board is arranged moved upwards, that is to say towards the viewer.

13th shows a schematic plan view of a sensor device 100 according to an embodiment. This can be the in 4th sensor device described 100 act, with the difference that the first board is arranged rotated to the left in relation to the second board.

14th shows a schematic plan view of a sensor device 100 according to an embodiment. This can be the in 5 sensor device described 100 act, with the difference that the first board is arranged rotated to the left in relation to the second board.

15th shows a schematic plan view of a sensor device 100 according to an embodiment. This can be the in 6th sensor device described 100 act, with the difference that the first board is arranged rotated to the left in relation to the second board.

16 shows a schematic plan view of a sensor device 100 according to an embodiment. This can be the in 13th sensor device described 100 act, with the difference that the first board is moved downwards with respect to the second board, that is, moved away from the viewer to the second board, is arranged.

17th shows a schematic plan view of a sensor device 100 according to an embodiment. This can be the in 14th sensor device described 100 act, with the difference that the first board is moved downwards with respect to the second board, that is, moved away from the viewer to the second board, is arranged.

18th shows a schematic plan view of a sensor device 100 according to an embodiment. This can be the in 15th sensor device described 100 act, with the difference that the first board is moved downwards with respect to the second board, that is, moved away from the viewer to the second board, is arranged.

the 4th until 18th show various superimposed displacements and rotations of the sensor device 100 in the form of two contact systems in the plane to each other. the 4th until 18th shows how and which overlapping areas are given an increase in the area - and thus an increase in the capacitance value - and which areas are reduced in the overlapping area - corresponding to a decrease in the capacitance. How to get into the 4th until 18th can read, shifts caused a change in the individual overlapping areas and thus a corresponding change in the respective capacity. However, only a rotation in the first order, namely according to this exemplary embodiment up to Ψ = ± α / 2, causes a detuning of the bridge signal.

According to one exemplary embodiment, one capacitor system projects beyond the other capacitor system, so that no interfering effects arise at an edge of the capacitor systems. Further contact systems with similar properties are conceivable according to further exemplary embodiments.

The sensor device presented here 100 enables a measurement of small relative rotation angles, e.g. B. for the purpose of measuring torsional twists. According to one exemplary embodiment, the sensor device is distinguished 100 by means of a non-contact structure made up of capacitors that show their values due to the design of the electrodes A. , B. , C. , D. and change counter-electrodes in the form of contacts in such a way that only a twist, for example up to a limit, causes a detuning of the half-measuring bridge formed from them. Another essential but optional feature is the filling of the gap between the boards / substrates with an elastic body, a gel or a liquid with the aim of increasing the capacitance through its dielectricity, as well as keeping foreign bodies or substances away.

19th shows a schematic cross-sectional representation of a torsion device 1900 with a sensor device 100 according to an embodiment. This can be one of the sensor devices described in one of the preceding figures 100 Act.

The torsion device 1900 has the sensor device 100 and a torsion element 1905 on, the first board having a first section 1910 of the torsion element 1905 is connected and the second board with a second section 1915 of the torsion element 1905 connected to the torsion between the sections 1910 , 1915 of the torsion element 1905 to sense. According to an alternative embodiment, the first board is with the second section 1915 of the torsion element 1905 connected and the second board to the first section 1910 of the torsion element 1905 tied together.

The torsion element 1905 comprises according to this embodiment a hollow shaft 1920 with a bridge 1925 that with the first section 1910 connected, and with a suspension 1930 that started with the second section 1915 connected is.

The suspension 1930 has a recording area 1935 on and the sensor device 100 is between the recording area 1935 and the jetty 1925 recorded. The recording area 1935 is according to this embodiment a longitudinal axis 1940 of the torsion element 1905 arranged. The suspension 1930 is according to this embodiment V-shaped or funnel-shaped to the receiving area 1935 shaped towards the top. For example, the suspension 1930 Shaped as a circular cone, with a blunt tip of the circular cone being the receiving area 1935 forms. The recording area 1935 is according to this embodiment as a perpendicular to the longitudinal axis 1940 extending surface formed, which according to this embodiment is parallel to the web 1925 is arranged. According to this embodiment, the sensor device 100 shaped as described in all the preceding figures and therefore plate-shaped between the receiving area 1935 and the jetty 1925 recorded.

For example, the first section represents 1910 one at a first end of the hollow shaft 1920 arranged first flange and the second section 1915 one at a second end of the hollow shaft 1920 arranged second flange. The flanges can be used to torque the hollow shaft 1920 initiate. According to one embodiment, the web is 1925 formed by the first flange. Alternatively, there is the bridge 1925 arranged adjacent to and at a distance from the first flange and rigidly with an inner wall of the hollow shaft 1920 tied together. According to one embodiment, the suspension 1930 Part of the second flange or rigidly connected to the second flange. The suspension 1930 can have a suitable shape, for example also be shaped as a wave.

An exemplary possible application of the sensor device is shown here 100 in the form of a differential capacitor system for measuring the twisting of the hollow shaft 1920 under torque load along the axis of symmetry or longitudinal axis 1940 in longitudinal section. It is also shown in one area 1945 an exemplary possible way of attaching the sensor device 100 . According to this exemplary embodiment, the type of attachment is central with the division of the differential capacitor into two segments.

20th shows a schematic cross-sectional representation of a torsion device 1900 with a sensor device 100 according to an embodiment. This can be the in 19th described torsion device 1900 act, with the difference that the recording area 1935 according to this embodiment, offset to the longitudinal axis 1940 is arranged. Is shown in a further area 2000 another exemplary possible way of attaching the sensor device 100 . According to this embodiment, the type of attachment is acentric with the division of the differential capacitor into two segments.

For example, the suspension 1930 shaped as an oblique circular cone.

21 shows a schematic cross-sectional representation of a torsion device 1900 with a sensor device 100 according to an embodiment. This can be the in 19th described torsion device 1900 act, with the difference that the receiving area according to this embodiment is circular around the longitudinal axis 1940 is arranged. The suspension 1930 is tubular according to this embodiment, for example cylindrical. The recording area 1935 is according to this embodiment as an inwardly curved edge at one end of the tubular suspension 1930 shaped. The recording area 1935 is circular and / or parallel to the web according to this embodiment 1925 arranged.

The circumferential outer wall of the suspension 1930 runs parallel to and spaced from the circumferential inner wall of the hollow shaft according to an embodiment 1920 .

According to one embodiment, the circuit boards are the sensor device 100 ring-shaped closed or multi-segment shaped.

It is shown in a first area 2000 and second area 2005 a further exemplary possible way of attaching the sensor device 100 . According to this embodiment, the mounting type is tubular with the division of the differential capacitor into two or more segments. According to an alternative embodiment, the differential capacitor has more than two segments, for example two by two segments or more.

22nd shows a schematic cross-sectional representation of a section of a torsion device 1900 with a sensor device 100 according to an embodiment. This can be the in 19th described torsion device 1900 act, with the difference that the sensor device 100 not plate-shaped between the receiving area 1935 and the jetty 1925 of the torsion element 1905 , but concentrically around the recording area 1935 the suspension 1930 or according to an alternative embodiment in the receiving area 1935 is arranged.

According to this exemplary embodiment, the second plate is in the shape of a hollow cylinder around a suspension end section 2200 around or according to the alternative embodiment in the suspension end portion 2200 attached. According to this exemplary embodiment, the first plate is in the shape of a hollow cylinder arranged around the hollow cylindrical second plate and with one of the web 1925 facing surface on the web 1925 attached. Thus, the circuit boards are the sensor device 100 annular around the longitudinal axis 1940 arranged. One edge of the outer one of the boards is rigid with the web 1925 and an inner wall of the interior of the boards rigidly connected to the receiving area 1935 tied together.

According to this exemplary embodiment, the fingers of the electrodes and counter electrodes are perpendicular to the web 1925 aligned. According to an alternative exemplary embodiment, the positions of the second circuit board and first circuit board described here are interchanged. Other arrangements for the sensor device are also conceivable 100 as far as they cause a bridge detuning mainly when rotating.

23 shows a schematic cross-sectional representation of a section of a torsion device 1900 with a sensor device 100 according to an embodiment. This can be the in 20th described torsion device 1900 act, with the difference that the sensor device 100 not plate-shaped between the receiving area and the web 1925 , but as in 22nd described is arranged concentrically around the receiving area of the suspension or according to an alternative embodiment in the receiving area.

24 shows a schematic cross-sectional representation of a section of a torsion device 1900 with a sensor device 100 according to an embodiment. This can be the in 21 described torsion device 1900 act, with the difference that the sensor device 100 not plate-shaped between the receiving area and the web 1925 , but as in 22nd described concentrically on the receiving area in the form of the edge and / or an inner wall section of the tubular suspension 1930 is arranged.

25th shows a schematic cross-sectional representation of a vehicle 2500 with an electromechanical roll stabilization system 2505 with a sensor device 100 according to an embodiment. This can be one of the sensor devices described in one of the preceding figures 100 Act.

The electromechanical roll stabilization system 2505 has the sensor device 100 and an electromechanical roll stabilization device 2510 with a torsion element 1905 on that as in 19th may be shaped as described. The electromechanical roll stabilization system is only exemplary 2500 according to this embodiment on the vehicle 2500 recorded.

The purely schematic representation shows a section through the vehicle 2500 along the vertical axis and transverse axis of the vehicle 2500 . A first axis is shown, for example 2520 with an embodiment of the roll stabilization device 2510 , which is also known as a stabilizer. The roll stabilization device 2510 is a two-part torsion bar with a first stabilizer element 2525 and a second stabilizer element 2530 realized. Here is one end of the first stabilizer element 2525 with a first suspension element 2535 of the vehicle 2500 connected and one end of the second stabilizer element 2530 with a second suspension element 2540 of the vehicle 2500 tied together.

For example, the ends of the stabilizer elements 2525 , 2530 in this case as arms, preferably curved or cranked approximately in the direction of travel, which are supported by means of articulated pendulum supports 2545 , 2550 each with the suspension elements 2535 , 2540 are connected. With the suspension elements 2535 , 2540 it is, for example, opposite wishbones of the vehicle 2500 . The stabilizer elements 2525 , 2530 are each by means of a superstructure bearing 2555 rotatable about a common axis of rotation DD on a chassis or the body of the vehicle 2500 attached. The axis of rotation DD corresponds here, for example, to the transverse axis of the vehicle 2500 .

One in each center of the vehicle 100 facing end of the stabilizer elements 2525 , 2530 is with at least one electric motor serving as an actuator of a three-phase drive device 2560 mechanically coupled. The three-phase drive device 2560 is designed to use a control signal 2565 from a control device 2570 who have favourited Stabilizer Elements 2525 , 2530 to rotate in opposite directions about the axis of rotation DD. Here represents the control signal 2565 For example, a signal determined based on a field-oriented regulation. By turning the stabilizer elements in opposite directions 2525 , 2530 become the suspension elements 2535 , 2540 moves and it can be counteracted a roll of the body, for example. When cornering. According to one embodiment, the vehicle is 2500 with the control device 2570 equipped to the three-phase drive device 2560 is connected and designed to receive the control signal 2565 provide.

The vehicle 2500 can also have at least one second electromechanical roll stabilization system that corresponds to the roll stabilization system 2505 can be executed. Alternatively, an alternative principle for roll stabilization can also be used. For example, the stabilizer elements 2525 , 2530 do not apply if the counter-roll torques are used, for example, using suitable actuators in the wheel suspension elements 2535 , 2540 to be provided.

List of reference symbols

α

Wrong angles

A.

first electrode

B.

second electrode

C.

third electrode

D.

fourth electrode

100

Sensor device

105

first board

110

second board

115

Input interface

120

Output interface

125

finger

130

first counter electrode

135

second counter electrode

140

Arch section

145

Connecting bridge

200

gap

UB

Torsion signal

300

first connection of the input interface

305

second connection of the input interface

310

Evaluation device

315

Evaluation voltage

320

Connection of the evaluation device

325

generator

330

further output interface

333

Reference voltage

335

first resistance

340

second resistance

345

further connection of the evaluation device

1900

Torsion device

1905

Torsion element

1910

first section of the torsion element

1915

second section of the torsion element

1920

Hollow shaft

1925

web

1930

suspension

1935

Recording area

1940

Longitudinal axis

1945

area

2000

further area

2100

first area

2105

second area

2200

Suspension end section

2500

vehicle

2505

electromechanical roll stabilization system

2510

electromechanical roll stabilization device

2520

first axis

2525

first stabilizer element

2530

second stabilizer element

2535

first suspension element

2540

second suspension element

2545

first pendulum support

2550

second pendulum support

2555

Body storage

2560

Three-phase drive device

2565

Control signal

2570

Control device

Claims (14)

Sensor device (100) for sensing a torsion of a torsion element (1905) for an electromechanical roll stabilization device (2510) for a vehicle (2500), the sensor device (100) having the following features: a first circuit board which is or can be arranged on the torsion element (1905) (105) comprising a first electrode (A) with a plurality of fingers (125), a second electrode (B) with a plurality of fingers (125), a third electrode (C) with a plurality of fingers (125) and a fourth electrode (D) with a plurality of fingers (125), a second plate (110) which is arranged or can be arranged on the torsion element (1905), a first counter electrode (130) with a plurality of fingers (125) and a second Having a counter electrode (135) with a plurality of fingers (125), the first electrode (A) and the first counter electrode (130) being arranged opposite one another and forming a first capacitor, the The second electrode (B) and the second counter electrode (135) are arranged opposite one another and form a second capacitor, the third electrode (C) and the second counter electrode (135) being arranged opposite one another and forming a third capacitor, the fourth electrode (D ) and the first counter-electrode (130) are arranged opposite one another and form a fourth capacitor, the second electrode (B) and the fourth electrode (D) being electrically connected to one another, an input interface (115) for providing one of a generator (325) generated excitation voltage to at least one of the electrodes (A, B, C, D), and an output interface (120) for providing an evaluation voltage (315) dependent on a relative position of the first board (105) with respect to the second board (110) that can be brought about by the torsion ). Sensor device (100) according to Claim 1 , in which a first connection (300) of the input interface (115) is connected to the first electrode (A) and a second connection (305) of the input interface (115) is connected to the third electrode (C). Sensor device (100) according to one of the preceding claims, with an evaluation device (310) which is electrically connected to the output interface (120), wherein the evaluation device (310) is designed to use the evaluation voltage (315) to generate a torsion signal (U _B ) to generate which represents a torsion value of the torsion of the torsion element (1905). Sensor device (100) according to one of the preceding claims, in which the fingers (125) of the first, second, third and / or fourth electrodes (A, B, C, D) extend in one plane and / or the fingers (125) the first counter-electrode (130) and second counter-electrode (135) extend in a further plane. Sensor device (100) according to one of the preceding claims, in which the first circuit board (105) and the second circuit board (110) are aligned parallel or concentrically to one another. Sensor device (100) according to one of the preceding claims, in which the fingers (125) of the first electrode (A) and fourth electrode (D) are aligned or parallel to one another, the fingers (125) of the second electrode (B) and third Electrode (C) are arranged in alignment or parallel to one another. Sensor device (100) according to one of the preceding claims, in which the fingers (125) of the first electrode (A) and second electrode (B) are arranged obliquely to one another. Sensor device (100) according to one of the preceding claims, in which the first electrode (A) and the third electrode (C) are structurally identical and / or rotated to one another and / or are arranged diagonally opposite and / or the second electrode (B) and the fourth Electrode (D) are structurally identical and / or rotated with respect to one another and / or arranged diagonally opposite one another. Sensor device (100) according to one of the preceding claims, in which the first electrode (A), second electrode (B), third electrode (C) and fourth electrode (D) are shaped like a segment of a circle and / or the first counter-electrode (130) and second Counter electrode (135) are shaped like a segment of a circle Torsion device (1900) with the torsion element (1905) and a sensor device (100) according to one of the preceding claims, wherein the first plate (105) is connected to a first section (1910) of the torsion element (1905) and / or the second plate ( 110) is connected to a second section (1010) of the torsion element (1905) in order to sense the torsion between the sections (1910, 1915) of the torsion element (1905). Torsion device (1900) according to Claim 10 , in which the torsion element (1905) as a hollow shaft (1920) with a web (1925) which is connected to the first section (1910) and with a suspension (1930) which is connected to the second section (1915) , wherein the suspension (1930) has a receiving area (1935) for receiving the sensor device (100), and the sensor device (100) is received between the receiving area (1935) and the web (1925). Torsion device (1900) according to Claim 11 , in which the receiving area (1935) is arranged on a longitudinal axis (1940) of the torsion element (1905) or offset to the longitudinal axis (1940) or circularly around the longitudinal axis (1940). Torsion device (1900) according to one of the Claims 11 until 12th , in which the sensor device (100) is accommodated in the form of a plate between the receiving area (1935) and the web (1925) or is arranged concentrically around the receiving area (1935) of the suspension (1930) or in the receiving area (1935). Electromechanical roll stabilization system (2505) with an electromechanical Roll stabilization device (2510) and a sensor device (100) according to one of the Claims 1 until 9 .

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