Sensor device for sensing a deformation of a deformation element for an electromechanical roll stabilization device for a vehicle and electromechanical roll stabilization system with a sensor device

Abstract

Sensor device (110) for sensing a deformation of a deformation element (115) for an electromechanical roll stabilization device (112) for a vehicle (100), wherein the sensor device (110) has the following features: an input interface (120) for providing an alternating voltage generated by a generator (800), a first measuring coil (125) arranged or arrangeable on the deformation element (115), which is designed to generate a magnetic field using the alternating voltage, at least one second measuring coil (130) arranged or arrangeable on the deformation element (115), which is designed to generate a measuring coil voltage (140) using the magnetic field, an output interface (135) for outputting the measuring coil voltage (140) to an evaluation device (802) which is designed to generate a deformation signal (U B ) which represents a deformation value of the deformation of the deformation element (115), wherein the first measuring coil (125) at least partially surrounds the second measuring coil (130), characterized by at least one second measuring coil (130) arranged or arrangeable on the deformation element (115), which is designed to generate a second measuring coil voltage using the magnetic field, wherein the first measuring coil (125) at least partially surrounds the second measuring coil (130), wherein the output interface (135) is designed to output the second measuring coil voltage to the evaluation device (802), which is designed to generate the deformation signal (UB ) to generate.

Description

[0001] The present approach relates to a sensor device for sensing a deformation of a deformation element for an electromechanical roll stabilization device for a vehicle and an electromechanical roll stabilization system with a sensor device.

[0002] From DE 695 20 608 T2, a sensor device for sensing a deformation of a deformation element is known. Fig. 8 discloses a device with a U-shaped ferrite core around which a detection coil and, externally around its outer circumference, an excitation coil are wound. The excitation coil is connected to an oscillator, and the detection coil is connected to a spectrum analyzer, which serves as an evaluation device. WO 2007 / 116 218 A1 is also mentioned, which discloses another sensor device.

[0003] Furthermore, DE 10 2011 089 605 A1 discloses an electromechanical roll stabilization system for a vehicle with a sensor device for force measurement. The sensor device comprises at least one field generating means for generating an alternating electromagnetic field and a detection means for detecting field changes depending on force effects or deformations of a component of the roll stabilizer.

[0004] For magnetostrictive sensors, especially active ones where a test magnetic field is dynamically excited by a coil, the best possible coupling of this excitation coil to the magnetostrictive deformation body is desirable. At the same time, the measuring coils should also be well coupled to the deformation body and the excitation coil to obtain a large measurement signal. Therefore, the measuring coils are usually arranged closely around the excitation coil.

[0005] Against this background, the present approach provides an improved sensor device for sensing a deformation of a deformation element for an electromechanical roll stabilization device for a vehicle, as well as an electromechanical roll stabilization device with an improved sensor device according to the main claims. Advantageous embodiments emerge from the subclaims and the following description.

[0006] The advantages achievable with the presented approach are that an arrangement of the coils is created for an active magnetostrictive sensor, which leads to an improved signal-to-noise ratio and additionally or alternatively to a simplification of the structure.

[0007] A sensor device for sensing a deformation of a deformation element for an electromechanical roll stabilization device for a vehicle comprises an input interface, a first measuring coil, at least one second measuring coil, and an output interface. The input interface is configured to provide an alternating voltage generated by a generator. The first measuring coil is arranged or can be arranged on the deformation element and is configured to generate a magnetic field using the alternating voltage. The second measuring coil is also arranged or can be arranged on the deformation element and is configured to generate a measuring coil voltage using the magnetic field.The output interface is configured to output the measuring coil voltage to an evaluation device, which is configured to use the measuring coil voltage to generate a deformation signal that represents a deformation value of the deformation of the deformation element. The first measuring coil at least partially surrounds the second measuring coil.

[0008] The deformation element can be a part suitable for force transmission. For example, the deformation element can be part of an electromechanical roll stabilization device for effecting electromechanical roll stabilization, abbreviated to "ERC" (Electromechanical Roll Control). Thus, the deformation element can be part of an ERC actuator. For example, the deformation element can be a shaft, a hollow shaft, or a housing of the electromechanical roll stabilization device. The sensor device can be used to detect the deformation of the deformation element during operation of the electromechanical roll stabilization device, for example, a strain and additionally or alternatively shear strain of the deformation 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.The sensor device can be a magnetostrictive sensor, for example an active magnetostrictive sensor. The deformation of the deformation element can be detected by the magnetic field generated by the first measuring coil and detected by the second measuring coil. This can result from the deformation changing a relative position between the first measuring coil and the second measuring coil and / or a shape of the measuring coils. In a variant of the sensor device with the first measuring coil arranged around the second measuring coil, the magnetic field can advantageously act particularly evenly on the second measuring coil. The first measuring coil serves as an excitation coil. In a variant of the sensor device with the first and second measuring coils connected in series, an excitation coil specifically used to excite the magnetic field can advantageously be omitted.

[0009] The sensor device can further comprise the evaluation device, which is electrically connected to the output interface. This allows the deformation signal to be generated quickly and easily. The evaluation device can be designed to detect and / or evaluate a voltage change at the coils caused by the deformation. Known measurement principles can be used for this purpose.

[0010] According to one embodiment, the sensor device may further comprise the generator for generating the alternating voltage, wherein the generator is electrically connected to the input interface. The generator may, for example, be configured as an alternating voltage source or an alternating current source. This allows for the quick and easy provision of alternating voltage for generating the magnetic field.

[0011] The second measuring coil can have a connecting line section and at least one winding section, wherein the connecting line section is arranged at least partially outside the first measuring coil, and the first measuring coil surrounds the winding section. The connecting line section can be provided and shaped for connection to the output interface and optionally also to the input interface. The connecting line section can have an outermost section with two terminals of the second measuring coil and a transfer section crossing the first measuring coil. In this way, the second measuring coil surrounded by the first measuring coil can be electrically contacted.

[0012] According to one embodiment, the second measuring coil can have an additional winding section, which can be arranged outside the first measuring coil. Field coupling can be improved by internal and external winding sections.

[0013] According to the invention, the sensor device has at least one second measuring coil arranged or arrangeable on the deformation element, which is designed to generate a second measuring coil voltage using the magnetic field, wherein the first measuring coil at least partially surrounds the second measuring coil. The output interface is designed to output the second measuring coil voltage to the evaluation device. The evaluation device is correspondingly designed to generate the deformation signal using the second measuring coil voltage.

[0014] The second measuring coil and the second second measuring coil can be arranged adjacent to each other and, for example, have the same distance from the first measuring coil in the form of the excitation coil. Uniaxial strain of the deformation element can thus be reliably sensed using the second measuring coil voltage and the second second measuring coil voltage.

[0015] According to one embodiment, the second measuring coil and the second second measuring coil can be structurally identical. Additionally or alternatively, the two second measuring coils can be arranged rotated relative to one another. For example, the second measuring coils can be wound in the shape of a segment of a circle or rectangularly. For example, the two second measuring coils can be arranged opposite one another, rotated by 180 degrees, and each wound in a semicircle, for example. The first measuring coil can be arranged in a circle around the semicircular second measuring coils. If the second measuring coils are wound rectangularly, the first measuring coil can also be wound rectangularly. In this way, the area enclosed by the first measuring coil can be optimally utilized.

[0016] The sensor device can have at least one third second measuring coil arranged or arrangeable on the deformation element, which is designed to generate a third second measuring coil voltage using the magnetic field. Additionally or alternatively, the sensor device can have a fourth second measuring coil arranged or arrangeable on the deformation element, which is designed to generate a fourth second measuring coil voltage using the magnetic field. In this case, the first measuring coil can also at least partially surround the third second measuring coil and additionally or alternatively the fourth second measuring coil. The output interface can be designed accordingly to output the second third measuring coil voltage and additionally or alternatively the second fourth measuring coil voltage to the evaluation device.The evaluation device can be designed to generate the deformation signal using the second third measuring coil voltage and additionally or alternatively the second fourth measuring coil voltage.

[0017] The four second measuring coils can be arranged adjacent to one another, for example, in a matrix. Additionally or alternatively, the four second measuring coils can be arranged at the same distance from the first measuring coil in the form of the excitation coil. Shear strain of the deformation element can thus be reliably sensed using the four second measuring coil voltages.

[0018] The third second measuring coil and, additionally or alternatively, the fourth second measuring coil can also be identical in construction and, additionally or alternatively, arranged rotated relative to each other, and additionally or alternatively wound in a circular segment or rectangular shape. For example, the four second measuring coils can each be arranged rotated 90 degrees relative to each other, for example, wound in a quarter-circle shape. The first measuring coil can be arranged in a circle around the four quarter-circle-shaped second measuring coils. This allows for optimal use of the installation space on the deformation element.

[0019] A first terminal of the first measuring coil can be directly connected to the input interface, and a second terminal of the first measuring coil can be directly connected to the input interface. A first terminal of the second measuring coil can be connected to a first measuring terminal of the evaluation device via the output interface, and a second terminal of the second measuring coil can be connected to a potential terminal of the evaluation device via the output interface. A first terminal of the second measuring coil can be connected to a second measuring terminal of the evaluation device via the output interface, and a second terminal of the second measuring coil can be connected to the potential terminal of the evaluation device via the output interface.A first connection of the third second measuring coil can be connected to a third measuring connection of the evaluation device via the output interface, and a second connection of the third second measuring coil can be connected to the potential connection of the evaluation device via the output interface. A first connection of the fourth second measuring coil can be connected to a fourth measuring connection of the evaluation device via the output interface, and a second connection of the fourth second measuring coil can be connected to the potential connection of the evaluation device via the output interface. In this way, a functional circuit for a sensor device with a separate excitation coil can be realized.

[0020] It is further advantageous if, according to one embodiment, the evaluation device comprises a first comparison device, a second comparison device, and a third comparison device. A first input of the first comparison device can be connected to the first measuring connection, and a second input of the first comparison device can be connected to the second measuring connection. The first comparison device can be designed to provide a first comparison signal at an output of the first comparison device. A first input of the second comparison device can be connected to the third measuring connection, and a second input of the second comparison device can be connected to the fourth measuring connection. The second comparison device can be designed to provide a second comparison signal at an output of the second comparison device.A first input of the third comparison device can be connected to the output of the first comparison device, and a second input of the third comparison device can be connected to the output of the second comparison device. The third comparison device can be configured to provide the deformation signal using the first comparison signal and the second comparison signal at an output of the third comparison device. Thus, a differential voltage between two opposing measuring coils can be determined by the first comparison device, and a further differential voltage between the two other opposing measuring coils can be determined by the second comparison device, wherein the asymmetry of the two differential voltages can be determined by the third comparison device. This asymmetry can represent the deformation signal in the form of a shear strain of the deformation element.

[0021] As an alternative to the second measuring coils described above, the sensor device can also have at least one third measuring coil arranged or arrangeable on the deformation element, which is designed to generate a third measuring coil voltage using the magnetic field, and additionally or alternatively have a fourth measuring coil arranged or arrangeable on the deformation element, which is designed to generate a fourth measuring coil voltage using the magnetic field. The first, second, third and additionally or alternatively fourth measuring coil can be connected in series. For example, the first and second measuring coils can be connected in series with one another, and the third and fourth measuring coils can be connected in series with one another. Alternatively, the first, second, third and fourth measuring coils can be connected together in series.The output interface can be configured to output the third measuring coil voltage and, additionally or alternatively, the fourth measuring coil voltage to the evaluation device. The evaluation device can be configured to generate the deformation signal using the third measuring coil voltage and, additionally or alternatively, the fourth measuring coil voltage. According to one embodiment, the evaluation device can be configured to determine the deformation signal based on a difference between two measuring coil voltages, which are tapped via the output interface at a connecting line connecting the first and second measuring coils and a connecting line connecting the third and fourth measuring coils.

[0022] The first, second, third, and additionally or alternatively fourth measuring coils can be arranged relative to one another in accordance with one of the previously described arrangements of the four second measuring coils, for example, each wound in a quarter-circle shape and arranged facing one another in a matrix. In a variant of the sensor device with all measuring coils connected in series, the first measuring coil can also be designed to generate a first measuring coil voltage using the magnetic field, wherein the output interface can be designed to output the first measuring coil voltage to the evaluation device. The evaluation device can be designed to generate the deformation signal using the first measuring coil voltage. Shear strain of the deformation element can thus be reliably sensed using the four measuring coil voltages, even without a separate excitation coil.

[0023] As an alternative to the circuit with a separate excitation coil described above, in a circuit for the measuring coils connected in series, a first connection of the first measuring coil can be connected to a first connection of the generator via the input interface, a second connection of the first measuring coil can be connected directly to a first connection of the second measuring coil, a second connection of the second measuring coil can be connected directly to a first connection of the third measuring coil, a second connection of the third measuring coil can be connected directly to a first connection of the fourth measuring coil, and a second connection of the fourth measuring coil can be connected to a second connection of the generator via the input interface.The second connection of the first measuring coil can be connected to a first measuring connection of the evaluation device via the output interface, and the second connection of the third measuring coil can be connected to a second measuring connection of the evaluation device via the output interface. In this way, a functional circuit for a sensor device with four series-connected measuring coils can be realized without a separate excitation coil.

[0024] It is further advantageous if, according to one embodiment, the evaluation device comprises a comparison device, wherein a first input of the comparison device is connectable to the first measuring connection, and a second input of the comparison device is connectable to the second measuring connection. The comparison device can be designed to provide the deformation signal at an output of the comparison device. Thus, the comparison device can be designed to form a difference between the voltages, which represents the deformation signal, using the voltages present at the first measuring connection and the second measuring connection. Only one comparison device is necessary for this purpose.

[0025] The first measuring coil and the second measuring coil can be identical in construction and additionally or alternatively arranged rotated relative to each other and additionally or alternatively wound in the shape of a segment of a circle or a rectangle and the first measuring coil and the second measuring coil can be connected in series.

[0026] Furthermore, an electromechanical roll stabilization system for a vehicle is presented, comprising an electromechanical roll stabilization device and a sensor device configured in one of the previously described variants. In such an electromechanical roll stabilization system, the sensor device enables sensing of a deformation element of the electromechanical roll stabilization device using a magnetic field, with a very good signal-to-noise ratio and, additionally or alternatively, a simple / space-reduced design of the sensor device on the deformation element.

[0027] Examples of the approach presented here are shown in the drawings and explained in more detail in the following description. They show: Fig. 1 a schematic representation of a vehicle with an electromechanical roll stabilization system with a sensor device according to an embodiment; Fig. 2 to 16 each show a schematic representation of a sensor device according to an embodiment; and Fig. 17 a schematic cross-sectional view of an electromechanical roll stabilization system with a sensor device according to an embodiment.

[0028] In the following description of preferred 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, whereby a repeated description of these elements is omitted.

[0029] Fig. Figure 1 shows a schematic representation of a vehicle 100 with an electromechanical roll stabilization system 105 with a sensor device 110 according to one exemplary embodiment. The application of the sensor device 110 in connection with the roll stabilization system 105 is chosen only as an example. The sensor device 110 can also be used in other systems in which deformation can be detected, for example, in machine parts or supporting elements of structures.

[0030] Solely by way of example, the electromechanical roll stabilization system 105, which comprises an electromechanical roll stabilization device 112 and the sensor device 110, is accommodated in the vehicle 100. The sensor device 110 is also arranged, merely by way of example, on a deformation element 115 of the electromechanical roll stabilization device 105. The electromechanical roll stabilization device 112 is in Fig. 17 presented and described in more detail.

[0031] The electromechanical roll stabilization device 112 is designed to perform electromechanical roll stabilization, abbreviated to "ERC," for the vehicle 100. According to one exemplary embodiment, this functions as follows: On a front and / or rear axle of the vehicle 100, active electromechanical roll stabilization systems generate stabilization moments during cornering, so that a rolling movement of the vehicle body is minimized or completely eliminated. In addition, according to one exemplary embodiment, optimal steering and load change behavior is generated. In contrast, when driving straight ahead, according to one exemplary embodiment, an electronic control system adjusts the damping level and ensures a softer, more comfortable suspension response.According to one exemplary embodiment, the body's copying movement is reduced, giving the vehicle 100 high agility and accuracy across the entire speed range. According to this exemplary embodiment, the vehicle 100 is a mid-size or luxury-class vehicle with any type of drive system, in this case, a hybrid or electric drive.

[0032] The sensor device 110 is designed to sense a deformation of the deformation element 115. For this purpose, the sensor device 110 has an input interface 120, a first measuring coil 125, at least one second measuring coil 130, and an output interface 135. The input interface 120 is designed to provide an alternating voltage generated by a generator. The first measuring coil 125 is arranged or can be arranged on the deformation element 115 and is designed to generate a magnetic field using the alternating voltage. The second measuring coil 130 is also arranged or can be arranged on the deformation element 115 and is designed to generate a measuring coil voltage 140 using the magnetic field.The output interface 135 is configured to output the measuring coil voltage 140 to an evaluation device, which is configured to generate a deformation signal using the measuring coil voltage 140, which signal represents a deformation value of the deformation of the deformation element 115. The first measuring coil 125 at least partially surrounds the second measuring coil 130.

[0033] According to one embodiment, the deformation element 115 is formed as a hollow shaft, which is closed at both ends by a flange for torque transmission. Such a hollow shaft is suitable, for example, for an ERC actuator. According to one embodiment, the sensor device 110 is arranged on an inner wall of the hollow shaft. The hollow shaft can thus form a housing in which the sensor device 110 can be arranged, protected from environmental influences.

[0034] According to one exemplary embodiment, the sensor device 110 serves to detect the deformation of the deformation element 115, for example, an elongation and / or shear strain of the deformation element 115, and thus an applied torque of the vehicle 100 during operation of the electromechanical roll stabilization device 112. This can be used, for example, to correctly control the electromechanical roll stabilization device 112 to stabilize the vehicle 100.

[0035] According to this exemplary embodiment, the sensor device 110 is a magnetostrictive sensor, for example, an active magnetostrictive sensor. The magnetic field generated by the first measuring coil 125 is used to sense the deformation of the deformation element 115. This utilizes the fact that the measuring coil voltage 140 tapped at the second measuring coil 130 is dependent on the deformation of the deformation element 115. According to this exemplary embodiment, the first measuring coil 125 serves as an excitation coil and is also referred to below as the "excitation coil."

[0036] According to this exemplary embodiment, the second measuring coil 130 has a connecting line section 145 and at least one winding section 150, wherein the connecting line section 145 is arranged at least partially outside the first measuring coil 125 and the first measuring coil 125 surrounds the winding section 150. According to this exemplary embodiment, the connecting line section 145 has an outermost section of the second measuring coil 130, which is connected to the output interface 135. A transfer section of the connecting line section 145 adjacent to the outermost section crosses the first measuring coil 125 and partially the winding section 150, according to this exemplary embodiment. The winding section 150 has at least one, here a plurality, more precisely three windings, according to this exemplary embodiment. The windings are circular in shape, for example, but can also have other shapes suitable for forming a coil.According to one embodiment, the connecting line section 145 extends linearly away from the winding section 150. According to this embodiment, the length of the connecting line section 145 is similar to or greater than the outer diameter of the winding section 150.

[0037] According to this exemplary embodiment, the second measuring coil 130 is designed as a planar measuring coil. The first measuring coil 125 is also designed as a planar measuring coil. According to this exemplary embodiment, the first measuring coil 125 also has, by way of example, only three circular windings, although a different number and / or shape of the windings is also possible. According to one exemplary embodiment, the sensor device 110 has at least one second measuring coil 130. By way of example, the sensor device 110 here also has a third second measuring coil 130 and a fourth second measuring coil 130. The number of second measuring coils 130 can be freely selected, for example, depending on the desired measuring accuracy. The second measuring coils 130 are surrounded by the first measuring coil 125.The measuring coils 125, 130 are arranged on the deformation element 115, for example applied to a surface of the deformation element 115 or integrated into a surface of the deformation element 115.

[0038] According to this exemplary embodiment, the second measuring coil 130 is designed to use the magnetic field generated by the first measuring coil 125 to generate a second measuring coil voltage that can be tapped off via the output interface 135 of the second measuring coil 130. The third measuring coil 130 is designed to use the magnetic field to generate a third measuring coil voltage that can be tapped off via the output interface 135 of the third second measuring coil 130. The fourth measuring coil 130 is designed to use the magnetic field to generate a fourth measuring coil voltage that can be tapped off via the output interface 135 of the fourth second measuring coil 130. The evaluation device is designed to generate the deformation signal using the tapped second measuring coil voltages.

[0039] According to this exemplary embodiment, the four second measuring coils 130 are identical in construction and arranged in a matrix, maintaining the same distance from the first measuring coil 125. According to this exemplary embodiment, the four second measuring coils 130 are arranged with their connecting line sections 145 each rotated by 90 degrees relative to one another. According to this exemplary embodiment, the four connecting line sections 145 of the four second measuring coils 130 are each arranged perpendicular to adjacently arranged connecting line sections 145 and parallel to oppositely arranged connecting line sections 145 and do not cross one another.

[0040] According to one embodiment, the sensor device 110 further comprises the evaluation device, which is electrically connected to the output interface 135, and / or the generator for generating the alternating voltage, wherein the generator is electrically connected to the input interface 120, as described, for example, in Fig. 8 is shown.

[0041] The sensor device 110 presented here implements an advantageous coil arrangement for magnetostrictive sensing or magnetostriction. A key feature of the sensor device 110 is the arrangement of the coils 125, 130 of the sensor device 110 in the form of an active magnetostrictive sensor. This coil arrangement results in a very good signal-to-noise ratio and a simple design.

[0042] The sensor device 110 is designed to dynamically excite a test magnetic field using the first measuring coil 125, with the best possible coupling of this excitation coil to the deformation element 115 in the form of a magnetostrictive deformation body being realized. At the same time, the second measuring coils 130 are also well coupled to the deformation body and the excitation coil in order to obtain a large measurement signal. For this purpose, the excitation coil is arranged tightly around the second measuring coils 130 according to this exemplary embodiment.

[0043] The coil arrangement of the four second measuring coils 130 shown here enables a magnetostrictive shear stress measurement as well as a torsion measurement of the deformation body 115. According to the Fig. 3 to 5 with only two second measuring coils 130, a magnetostrictive strain measurement of the deformation body 115 is possible.

[0044] During operation, a high-frequency alternating current flows through the first measuring coil 125, magnetically exciting a material located below and above it, which, according to one exemplary embodiment, is ferromagnetic / conductive. In the second measuring coils 130, which can also be referred to as "satellite coils," this magnetic flux induces a voltage of equal magnitude if, as in this exemplary embodiment, the distances, number of turns, and areas are identical. Due to mechanical stress in the ferromagnetic / conductive material, the magnetic flux is coupled into the satellite coils slightly differently. This is due both to the influence of strain on conductivity and the magnetic behavior (magnetostriction).

[0045] If the second measuring coils 130 are connected to form a measuring bridge according to one embodiment, a strain-dependent measurement signal can be measured. Depending on the arrangement relative to the mechanical stress or strain, a linear strain or shear strain (torsion) can be measured via the inverse magnetostrictive effect (Villari). The arrangement can be used with air coils without a core, as in this embodiment, or with a common core, e.g., made of ferrite, according to an alternative embodiment. Both have specific advantages and disadvantages.

[0046] Shown are Fig. 1 and the following figures show two variants: one for measuring strain, the other for measuring shear strain. In both cases, a good coupling between the excitation coil, magnetostrictive deformation element 115, and measuring coils is achieved due to the large surface area of ​​the excitation coil in the form of the first measuring coil 125 and the enclosing of the second measuring coil 130.

[0047] Fig. Figure 2 shows a schematic representation of a sensor device 110 according to an embodiment. This can be the sensor device shown in Fig. 1, with the difference that the four second measuring coils 130 are not circular, but are each wound in the shape of a circular segment.

[0048] Each of the four second measuring coils 130 is wound in a quarter-circle shape according to this embodiment. Four angular, here rectangular, sections of the quarter-circle windings of the four second measuring coils 130 are arranged facing each other. Four bent sections of the quarter-circle windings of the four second measuring coils 130 are arranged facing the first measuring coil 125. The first measuring coil 125 is arranged in a circle around the quarter-circle second measuring coils 130 according to this embodiment. Thus, compared to the Fig. 1, an area within the first measuring coil 125 is ideally utilized by the second measuring coils 130. As is also the case in Fig. 1, the sensor device 110 shown here is suitable for measuring multi-axial stress states.

[0049] Fig. Figure 3 shows a schematic representation of a sensor device 110 according to an embodiment. This can be the sensor device shown in Fig. 2, with the difference that the sensor device 110 according to this embodiment has only two of the second measuring coils 130.

[0050] According to this exemplary embodiment, the second measuring coil 130 and the second second measuring coil 130 are arranged opposite one another, rotated by 180 degrees, and here, for example, are wound semicircularly. Two straight sections of the semicircular windings of the two second measuring coils 130 are arranged facing one another and / or, according to this exemplary embodiment, run parallel and / or centrally within the first measuring coil 125. Two curved sections of the semicircular windings of the two second measuring coils 130 are arranged facing the first measuring coil 125. According to this exemplary embodiment, the first measuring coil 125 is arranged in a circle around the semicircular second measuring coils 130. The sensor device 110 shown here is similar to that shown in Fig. 2, but suitable for measuring uniaxial / linear stress states. The sensors shown in the Fig. 4 to 6 described sensor devices 110.

[0051] Fig. Figure 4 shows a schematic representation of a sensor device 110 according to an embodiment. This can be the sensor device shown in Fig. 3, with the difference that the two second measuring coils 130 are each wound rectangularly according to this embodiment. The first measuring coil 125 is also wound rectangularly according to this embodiment, but squarely according to this embodiment. The rectangular basic shape shown here realizes a further improved adaptation to the linear stress state. The rectangular basic shape illustrates the principle; however, other shapes, which are even better adapted to the optimum in terms of signal yield from the strain state, its effect on the magnetic and electrical behavior of the material, and the coupling of the coils 125, 130 to them, are also possible.

[0052] Fig. Figure 5 shows a schematic representation of a sensor device 110 according to an embodiment. This can be the sensor device shown in Fig. 3, with the difference that the two second measuring coils 130, according to one embodiment, each have a further winding section 500, each arranged outside the first measuring coil 125. The further winding sections 500 each have three semicircular ring-shaped windings.

[0053] According to this exemplary embodiment, transfer sections of the connecting line sections 145 of the second measuring coils 130 also cross the further winding section 500 of their own second measuring coil 130. The first measuring coil 125 is arranged centrally between the winding sections 145, 500 of the second measuring coils 130 according to this exemplary embodiment. Shown here is a further Fig. 3 Improved version with second measuring coils 130 in the form of satellite coils, wound inside and outside the excitation coil in opposite directions. The double arrangement further improves the field coupling into these coils.

[0054] Fig. Figure 6 shows a schematic representation of a sensor device 110 according to an embodiment. This can be the sensor device shown in Fig. 5 described sensor device 110 with further winding sections, with the difference that the rectangular shape of the measuring coils 125, 130 according to Fig. 4. According to this exemplary embodiment, the additional winding sections 500 of the second measuring coils 130 are shaped according to their associated winding sections and / or arranged adjacent to them and / or mirrored to them outside the first measuring coil 125. The rectangular arrangement is also chosen here as an example of an improvement over the basic round shape. Other analogous continuations of this principle are also possible.

[0055] Fig. Figure 7 shows a schematic representation of a sensor device 110 according to an embodiment. This can be the sensor device shown in Fig. 5 described sensor device 110 with further winding sections, with the difference that the sensor device 110 has four of the second measuring coils 130, which as in Fig. 2 are shaped in a quarter-circle shape. Each of the four second measuring coils 130 has a further winding section, which has three windings in the shape of a quarter-circle ring. The sensor device 110 shown here is designed for measuring a 2-axis voltage state according to Fig. 2 suitable.

[0056] Fig. Figure 8 shows a schematic representation of a sensor device 110 according to an embodiment. This can be the sensor device shown in Fig. 1, Fig. 2 or Fig. This may be the sensor device 110 described in Figure 7. The optional generator 800 and the optional evaluation device 802 are also shown according to this embodiment.

[0057] Shown is an exemplary representation of an excitation and evaluation circuit of the sensor device 110 with the first measuring coil 125 in the form of the separate excitation coil for measuring biaxial stress states. During operation, the excitation coil is supplied with a current by the alternating current generator 800, which creates the excitation magnetic field. According to this exemplary embodiment, a differential voltage between two opposing second measuring coils 130 is evaluated in a first comparison device 810 of the evaluation device 802, and a differential voltage between the two other opposing second measuring coils 130 is evaluated in a second comparison device 815 of the evaluation device 802. An asymmetry of the two differential voltages is determined in a third comparison device 820 of the evaluation device 802 and yields the deformation signal U Bin the form of an output signal. According to an alternative embodiment, the second group of stress differences and the final difference calculation are omitted for the measurement of uniaxial stress states.

[0058] According to this exemplary embodiment, a first terminal of the first measuring coil 125 is connected to the input interface 120, and a second terminal of the first measuring coil 125 is connected to the input interface 120. Thus, the generator 800 is connected between the terminals of the first measuring coil 125.

[0059] A first terminal of the second measuring coil 130 is connected via the output interface 135 to a first measuring terminal of the evaluation device 802, and a second terminal of the second measuring coil 130 is connected via the output interface 135 to a potential terminal 817 of the evaluation device 802. A first terminal of the second measuring coil 130 is connected via the output interface 135 to a second measuring terminal of the evaluation device 802, and a second terminal of the second measuring coil 130 is connected via the output interface 135 to the potential terminal 817 of the evaluation device 802.

[0060] A first input of the first comparison device 810 is connected to the first measuring terminal, and a second input of the first comparison device 810 is connected to the second measuring terminal. In this way, the first comparison device 810 receives the measuring coil voltages present at the first measuring terminal and the second measuring terminal as input signals. The first comparison device 810 is configured to provide a first comparison signal 825 at an output of the first comparison device 810 using the input signals.

[0061] Accordingly, a first terminal of the third second measuring coil 130 is connected via the output interface 135 to a third measuring terminal of the evaluation device 802, and a second terminal of the third second measuring coil 130 is connected via the output interface 135 to the potential terminal 817 of the evaluation device 802. A first terminal of the fourth second measuring coil 130 is connected via the output interface 135 to a fourth measuring terminal of the evaluation device 802, and a second terminal of the fourth second measuring coil 130 is connected via the output interface 135 to the potential terminal 817 of the evaluation device 802.

[0062] A first input of the second comparison device 815 is connected to the third measuring terminal, and a second input of the second comparison device 815 is connected to the fourth measuring terminal. In this way, the second comparison device 815 receives the measuring coil voltages present at the third measuring terminal and the fourth measuring terminal as input signals. The second comparison device 815 is configured to provide a second comparison signal 830 at an output of the second comparison device 815 using the input signals.

[0063] A first input of the third comparison device 820 is connected to the output of the first comparison device 810 and a second input of the third comparison device 820 is connected to the output of the second comparison device 815. The third comparison device 820 is designed to generate the deformation signal U Busing the first comparison signal 825 and the second comparison signal 830 at an output of the third comparison device 820.

[0064] For example, the comparison devices 810, 815, 820 are implemented as operational amplifiers, differential amplifiers or comparators.

[0065] A main feature of the Fig. 1 to 8 is an improved magnetic coupling between the excitation coil and the second measuring coils 130 in the form of satellite coils, which leads to an improved signal yield and an improved signal-to-noise ratio.

[0066] Fig. Figure 9 shows a schematic representation of a sensor device 110 according to an embodiment. This may be a sensor device similar to that shown in Fig. 1, with the difference that the first measuring coil 125 does not surround the second measuring coil 130, but can be connected in series with the second measuring coil 130 via a suitable connecting line. According to this exemplary embodiment, the first measuring coil 125 is structurally identical to the second measuring coil 130 and is arranged adjacent to the second measuring coil 130, rotated by 90 or 180 degrees with respect to the second measuring coil 130.

[0067] Furthermore, the sensor device 110 according to an embodiment comprises at least a third measuring coil 900 and / or a fourth measuring coil 905, wherein the first and second measuring coils 125, 130 are connected in series by a suitable connecting line and the third and fourth measuring coils 900, 905 are connected in series by a suitable connecting line, as is shown for example by reference to Fig. 16. Alternatively, all measuring coils 125, 130, 900, 905 are connected in series.

[0068] According to this embodiment, the first measuring coil 125 is also designed to generate a first measuring coil voltage using the magnetic field, wherein the output interface is designed to output the first measuring coil voltage to the evaluation device, which is designed to generate the deformation signal using the first measuring coil voltage. According to one embodiment, each of the measuring coils 125, 130, 900, 905 is connected to both the input interface 120 and the output interface 135; see also Fig. 16. Shear strain of the deformation element can thus be reliably sensed using the four measuring coil voltages even without a separate excitation coil.

[0069] According to this exemplary embodiment, the sensor device 110 does not require an additional excitation coil. Opposing measuring coils 125, 130, 900, 905 for measuring shear / torsion and / or adjacent measuring coils 125, 130, 900, 905 for measuring strain are electrically connected in series according to this exemplary embodiment and are subjected to the same excitation alternating current during operation. According to one exemplary embodiment, the so-called "counter EMF" is measured in a bridge configuration as a voltage drop across the measuring coils 125, 130, 900, 905 and evaluated as a strain signal.

[0070] Fig. 10 shows a schematic representation of a sensor device 110 according to an embodiment. This can be the sensor device shown in Fig. 9, with the difference that the sensor device 110 according to this exemplary embodiment has only the first measuring coil 125 and the second measuring coil 130. According to this exemplary embodiment, the first measuring coil 125 and the second measuring coil 130 are arranged opposite one another, rotated by 180 degrees, and here, for example, are each wound semicircularly. Two straight sections of the semicircular windings of the two measuring coils 125, 130 are arranged facing one another and / or run parallel according to this exemplary embodiment. Two curved sections of the semicircular windings of the two measuring coils 125, 130 are arranged facing outwards.

[0071] The coil arrangement of the measuring coils 125, 130 corresponds according to this embodiment to that in Fig. 3 described two second measuring coils or is similar to the one in Fig. 3, but omitting the separate excitation coil. According to this embodiment, the two measuring coils 125, 130 are electrically connected in series and the applied voltage is, for example, with a circuit according to Fig. 16 evaluable.

[0072] Fig. 11 shows a schematic representation of a sensor device 110 according to an embodiment. This can be the sensor device shown in Fig. 10, with the difference that the two measuring coils 125, 130 according to this embodiment are each wound rectangularly. The coil arrangement of the measuring coils 125, 130 shown here connects the elements of the Fig. 4 and Fig. 10, with omission of the separate excitation coil with an exemplary rectangular basic shape better adapted to a plane uniaxial stress state.

[0073] Fig. 12 shows a schematic representation of a sensor device 110 according to an embodiment. This can be the sensor device shown in Fig. 10 described sensor device 110, with the difference that the measuring coils 125, 130 are arranged according to the Fig. 5 described two second measuring coils are formed, omitting the separate excitation coil. Fig. 13 shows a schematic representation of a sensor device 110 according to an embodiment. This can be the sensor device shown in Fig. 11 described sensor device 110, with the difference that the measuring coils 125, 130 are arranged according to the Fig. 6, omitting the separate excitation coil. Thus, each of the measuring coils 125, 130 has two windings arranged adjacent to one another. All four windings of the measuring coils 125, 130 are arranged in a row.

[0074] Fig. 14 shows a schematic representation of a sensor device 110 according to an embodiment. This can be the sensor device shown in Fig. 9 described sensor device 110, with the difference that the measuring coils 125, 130, 900, 905 are arranged in accordance with the Fig. 2 described four second measuring coils. Compared to Fig. 9, a better utilization of the area of ​​the measuring coils 125, 130, 900, 905 in the form of satellite coils is achieved.

[0075] Fig. 15 shows a schematic representation of a sensor device 110 according to an embodiment. This can be the sensor device shown in Fig. 14 described sensor device 110, with the difference that the measuring coils 125, 130, 900, 905 are arranged according to the Fig. 7 described four second measuring coils are formed. In other words, the sensor device 110 according to this embodiment as in Fig. 7, omitting the excitation coil and as in Fig. 12 for measuring the 2-axis mechanical stress state. Thus, each of the measuring coils 125, 130, 900, 905 has two windings arranged adjacent to one another. Four inner windings of the measuring coils 125, 130, 900, 905 are shaped like circular segments and together form a circle. Four outer windings of the measuring coils 125, 130, 900, 905 are shaped like ring segments and together form a circular ring that surrounds the circle formed by the inner windings.

[0076] Fig. 16 shows a schematic representation of a sensor device 110 according to an embodiment. This can be the sensor device shown in Fig. 9, Fig. 14 or Fig. 15. The optional generator 800 and the optional evaluation device 802 are also shown according to this exemplary embodiment. According to this exemplary embodiment, a first terminal of the first measuring coil 125 is connected via the input interface 120 to a first terminal of the generator 800, a second terminal of the first measuring coil 125 is directly connected to a first terminal of the second measuring coil 130, and a second terminal of the second measuring coil 130 is directly connected to a second terminal of the generator 800.

[0077] According to this exemplary embodiment, a first terminal of the third measuring coil 900 is connected to the first terminal of the generator 800 via the input interface 120, a second terminal of the third measuring coil 900 is directly connected to a first terminal of the fourth measuring coil 905, and a second terminal of the fourth measuring coil 905 is directly connected to the second terminal of the generator 800.

[0078] The second connection of the first measuring coil 125 is further connected via the output interface 135 to a first measuring connection of the evaluation device 802 and the second connection of the third measuring coil 900 is connected via the output interface 135 to a second measuring connection of the evaluation device 802.

[0079] According to this embodiment, the evaluation device 802 comprises a comparison device 1600, wherein a first input of the comparison device 1600 according to this embodiment is connected to the first measuring connection and a second input of the comparison device 1600 according to this embodiment is connected to the second measuring connection, wherein the comparison device 1600 is designed to determine the deformation signal U B at an output of the comparison device 1600. The comparison device 1600 is further connected to a potential terminal 817.

[0080] According to one embodiment, the first and second measuring coils 125, 130 are electrically conductively connected to one another directly, for example, without the interposition of another circuit element. Similarly, the third and fourth measuring coils 125, 130 are electrically conductively connected to one another directly, for example, without the interposition of another circuit element. Shown is an exemplary representation of an excitation and evaluation circuit of the sensor device 110 without a separate excitation coil. Here, for example, the opposing measuring coils 125, 130 and the other two opposing measuring coils 900, 905 are each connected to the branches of a measuring bridge, the asymmetry of which is determined by the comparison device 1600 to form the deformation signal U Bevaluated in the form of an output signal. For the measurement of uniaxial voltage states, one branch of the bridge is omitted or replaced by a passive branch. Note also the significantly simpler circuit design compared to the one shown in Fig. 8 described circuit.

[0081] In the Fig. 9 to 16 show embodiments of the sensor device 110 in which the measuring coils 125, 130 and / or 900, 905 also take over the role of the excitation coil, so that the latter is omitted.

[0082] Fig. Figure 17 shows a schematic cross-sectional view of an electromechanical roll stabilization system 105 with a sensor device 110 according to an embodiment. This can be the sensor device 110 shown in Fig. 1 described electromechanical roll stabilization device 112 with one of the sensor devices 110 described in one of the preceding figures. The vehicle 100 can also Fig. 1 described vehicle 100.

[0083] The purely schematic illustration shows a section through the vehicle 100 along the vertical axis and transverse axis of the vehicle 100. Shown, for example, is a first axle 1700 with an exemplary embodiment of the roll stabilization device 112, also referred to as a stabilizer. The roll stabilization device 112 is implemented as a two-part torsion bar with a first stabilizer element 1705 and a second stabilizer element 1710. One end of the first stabilizer element 1705 is connected to a first wheel suspension element 1715 of the vehicle 100, and one end of the second stabilizer element 1710 is connected to a second wheel suspension element 1720 of the vehicle 100.

[0084] For example, the ends of the stabilizer elements 1705, 1710 are designed as arms, preferably bent or cranked approximately in the direction of travel, which are connected to the wheel suspension elements 1715, 1720 by means of articulated pendulum supports 1725, 1730. The wheel suspension elements 1715, 1720 are, for example, opposing wishbones of the vehicle 100. The stabilizer elements 1705, 1710 are each attached to a chassis or the body of the vehicle 100 by means of a body bearing 1735, rotatable about a common axis of rotation DD. The axis of rotation DD corresponds, for example, to the transverse axis of the vehicle 100.

[0085] Each end of the stabilizer elements 1705, 1710 facing the center of the vehicle 100 is mechanically coupled to at least one electric motor of a three-phase drive device 1740, acting as an actuator. The three-phase drive device 1740 is configured to rotate the stabilizer elements 1705, 1710 in opposite directions about the axis of rotation DD using a control signal 1745 from a control device 1750. The control signal 1745 represents, for example, a signal determined based on a field-oriented control system. By rotating the stabilizer elements 1705, 1710 in opposite directions, the wheel suspension elements 1715, 1720 are moved, and body roll, for example, when cornering, can be counteracted. According to one embodiment, the vehicle 100 is equipped with the control device 1750, which is connected to the three-phase drive device 1740 and is designed to provide the control signal 1745.

[0086] The vehicle 100 can also have at least a second electromechanical roll stabilization system, which can be designed correspondingly to the roll stabilization system 105. Alternatively, an alternative roll stabilization principle can also be used. For example, the stabilizer elements 1705, 1710 can be omitted if the counter-roll moments are provided, for example, using suitable actuators in the wheel suspension elements 1715, 1720. Reference symbol U B Deformation signal 100 vehicles 105 electromechanical roll stabilization system 110 Sensor device 112 electromechanical roll stabilization device 115 Deformation element 120 input interface 125 first measuring coil 130 second measuring coil 135 Output interface 140 measuring coil voltage 145 connecting line section 150 winding section 500 additional winding sections 800 Generator 802 Evaluation device 810 first comparison facility 815 second comparison device 817 Potential connection 820 third comparison facility 825 first comparison signal 830 second comparison signal 900 third measuring coil 905 fourth measuring coil 1600 comparison device 1700 first axle 1705 first stabilizer element 1710 second stabilizer element 1715 first wheel suspension element 1720 second wheel suspension element 1725 first pendulum support 1730 second pendulum support 1735 Reconstruction camp 1740 three-phase drive device 1745 control signal 1750 control device

Claims

[1] Sensor device (110) for sensing a deformation of a deformation element (115) for an electromechanical roll stabilization device (112) for a vehicle (100), wherein the sensor device (110) has the following features: an input interface (120) for providing an alternating voltage generated by a generator (800), a first measuring coil (125) arranged or arrangeable on the deformation element (115), which is designed to generate a magnetic field using the alternating voltage, at least one second measuring coil (130) arranged or arrangeable on the deformation element (115), which is designed to generate a measuring coil voltage (140) using the magnetic field, an output interface (135) for outputting the measuring coil voltage (140) to an evaluation device (802) which is designed to generate a deformation signal (U B ) representing a deformation value of the deformation of the deformation element (115), wherein the first measuring coil (125) at least partially surrounds the second measuring coil (130), characterized by at least one second measuring coil (130) arranged or arrangeable on the deformation element (115), which is designed to generate a second measuring coil voltage using the magnetic field, wherein the first measuring coil (125) at least partially surrounds the second measuring coil (130), wherein the output interface (135) is designed to output the second measuring coil voltage to the evaluation device (802), which is designed to generate the deformation signal (U B) to generate. [2] Sensor device (110) according to claim 1, with the evaluation device (802) which is electrically connected to the output interface (135). [3] Sensor device (110) according to one of the preceding claims, comprising the generator (800) for generating the alternating voltage, wherein the generator (800) is electrically connected to the input interface (120). [4] Sensor device (110) according to one of the preceding claims, wherein the second measuring coil (130) has a connecting line section (145) and at least one winding section (150), wherein the connecting line section (145) is arranged at least partially outside the first measuring coil (125) and the first measuring coil (125) surrounds the winding section (150). [5] Sensor device (110) according to claim 4, wherein the second measuring coil (130) has at least one further winding section (500) which is arranged outside the first measuring coil (125). [6] Sensor device (110) according to one of the preceding claims, in which the second measuring coil (130) and the second second measuring coil (130) are arranged identically and / or rotated relative to one another and / or wound in the shape of a circular segment or rectangularly. [7] Sensor device (110) according to one of the preceding claims, with at least one third second measuring coil (130) arranged or arrangeable on the deformation element (115), which is designed to generate a third second measuring coil voltage using the magnetic field and / or a fourth second measuring coil (130) arranged or arrangeable on the deformation element (115), which is designed to generate a fourth second measuring coil voltage using the magnetic field, wherein the first measuring coil (125) at least partially surrounds the third second measuring coil (130) and / or the fourth second measuring coil (130), wherein the output interface (135) is designed to output the third second measuring coil voltage and / or fourth second measuring coil voltage to the evaluation device (802), which is designed to generate the deformation signal (U B) to generate. [8] Sensor device (110) according to claim 7, wherein a first terminal of the first measuring coil (125) is directly contacted with the input interface (120) and a second terminal of the first measuring coil (125) is directly contacted with the input interface (120), wherein a first terminal of the second measuring coil (130) is connectable via the output interface (135) to a first measuring terminal of the evaluation device (802) and a second terminal of the second measuring coil (130) is connectable via the output interface (135) to a potential terminal (817) of the evaluation device (802), wherein a first terminal of the second measuring coil (130) is connectable via the output interface (135) to a second measuring terminal of the evaluation device (802) and a second terminal of the second measuring coil (130) is connectable via the output interface (135) to the potential terminal (817) of the evaluation device (802),wherein a first terminal of the third second measuring coil (130) is connectable to a third measuring terminal of the evaluation device (802) via the output interface (135) and a second terminal of the third second measuring coil (130) is connectable to the potential terminal (817) of the evaluation device (802) via the output interface (135), wherein a first terminal of the fourth second measuring coil (130) is connectable to a fourth measuring terminal of the evaluation device (802) via the output interface (135) and a second terminal of the fourth second measuring coil (130) is connectable to the potential terminal (817) of the evaluation device (802) via the output interface (135). [9] Sensor device (110) according to claim 8, wherein the evaluation device (802) comprises a first comparison device (810), a second comparison device (815) and a third comparison device (820), wherein a first input of the first comparison device (810) is connectable to the first measuring connection and a second input of the first comparison device (810) is connectable to the second measuring connection, and the first comparison device (810) is designed to provide a first comparison signal (825) at an output of the first comparison device (810), wherein a first input of the second comparison device (815) is connectable to the third measuring connection and a second input of the second comparison device (815) is connectable to the fourth measuring connection, and the second comparison device (815) is designed to provide a second comparison signal (830) at an output of the second comparison device (815),wherein a first input of the third comparison device (820) is connectable to the output of the first comparison device (810) and a second input of the third comparison device (820) is connectable to the output of the second comparison device (815) and the third comparison device (820) is designed to convert the deformation signal (U, B ) using the first comparison signal (825) and the second comparison signal (830) at an output of the third comparison device (820). [10] Sensor device (110) for sensing a deformation of a deformation element (115) for an electromechanical roll stabilization device (112) for a vehicle (100), wherein the sensor device (110) has the following features: an input interface (120) for providing an alternating voltage generated by a generator (800), a first measuring coil (125) arranged or arrangeable on the deformation element (115), which is designed to generate a magnetic field using the alternating voltage, at least one second measuring coil (130) arranged or arrangeable on the deformation element (115), which is designed to generate a measuring coil voltage (140) using the magnetic field, an output interface (135) for outputting the measuring coil voltage (140) to an evaluation device (802) which is designed to generate a deformation signal (U B ) representing a deformation value of the deformation of the deformation element (115), wherein the first measuring coil (125) at least partially surrounds the second measuring coil (130) or the first measuring coil (125) and the second measuring coil (130) are connected in series, with at least one third measuring coil (900) arranged or arrangeable on the deformation element (115), which is designed to generate a third measuring coil voltage using the magnetic field and / or a fourth measuring coil (905) arranged or arrangeable on the deformation element (115), which is designed to generate a fourth measuring coil voltage using the magnetic field, wherein the first, second, third and / or fourth measuring coil (125, 130, 900, 905) are connected in series, wherein the output interface (135) is designed to output the third measuring coil voltage and / or fourth measuring coil voltage to the evaluation device (802), which is designed to generate the deformation signal (U B ) to generate. [11] Sensor device (110) according to claim 10, wherein a first terminal of the first measuring coil (125) is connectable to a first terminal of the generator (800) via the input interface (120), a second terminal of the first measuring coil (125) is connectable to a first terminal of the second measuring coil (130), and a second terminal of the second measuring coil (130) is connectable to a second terminal of the generator (800) via the input interface (120), wherein a first terminal of the third measuring coil (900) is connectable to the first terminal of the generator (800) via the input interface (120), a second terminal of the third measuring coil (900) is connectable to a first terminal of the fourth measuring coil (905), and a second terminal of the fourth measuring coil (905) is connectable to the second terminal of the generator (800) via the input interface (120),and wherein the second terminal of the first measuring coil (125) is connectable to a first measuring terminal of the evaluation device (802) via the output interface (135) and the second terminal of the third measuring coil (900) is connectable to a second measuring terminal of the evaluation device (802) via the output interface (135). [12] Sensor device (110) according to claim 11, wherein the evaluation device (802) comprises a comparison device (1600), wherein a first input of the comparison device (1600) is connectable to the first measuring connection and a second input of the comparison device (1600) is connectable to the second measuring connection, wherein the comparison device (1600) is designed to determine the deformation signal (U B ) at an output of the comparison device (1600). [13] Sensor device (110) according to one of claims 10 to 12, wherein the first measuring coil (125) and the second measuring coil (130) are arranged identically and / or rotated relative to one another and / or wound in the shape of a segment of a circle or rectangularly and the first measuring coil (125) and the second measuring coil (130) are connected in series. [14] Electromechanical roll stabilization system (105) for a vehicle (100) with an electromechanical roll stabilization device (112) and a sensor device (110) according to one of the preceding claims.

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