Measured value detection device for inductive sensor assembly

Abstract

The embodiment of the invention relates to a measured value detection device for an inductive sensor assembly. The invention relates to a measured value detection device for an inductive sensor assembly for detecting a rotational movement, comprising a circuit carrier and a receiving structure of a receiving coil covering a circular ring and having at least two windings, the windings of the receiving coil each having two loop structures with periodically repeating loop sections, in at least two levels of the circuit carrier, the circuit structure sections arranged in different levels are electrically connected to each other via through-contacts, and the circuit structures are offset from each other by a predetermined distance angle and are each separated at at least one separation point. The receiving structure has at least a first separation point which is arranged within the receiving structure at a structurally related intersection point of the corresponding loop structure, the two loop structures are separated at the at least one first separation point, and the ends of the separated two loop structures are connected to each other in pairs by the corresponding connection structure, such that the two windings are electrically connected in series.

Description

Technical Field

[0001] This invention relates to a measurement detection device for an inductive sensor assembly. The invention also relates to an inductive sensor assembly having at least one such measurement detection device. Background Technology

[0002] Inductive sensor assemblies are known in the prior art, which have a measurement detection device with at least one excitation structure, at least one receiving structure, and at least one coupling device, also referred to as a target. Furthermore, the at least one excitation structure includes at least one excitation coil. The at least one coupling device includes at least one conductive coupling element. The at least one receiving structure has at least one, but typically two, receiving coils. A high-frequency current flows through the at least one excitation coil, generating an alternating magnetic field that induces eddy currents in the at least one coupling device. The inductive coupling between the at least one excitation coil and the at least one receiving coil depends on the position of the respective coupling device. The induced voltage signal in the at least one receiving coil can be used to infer the current position of the coupling device, thereby inferring the current position of the object whose motion should be detected.

[0003] An inductive angle sensor is known from DE 10 2020 206 396A1, which has a k-fold symmetrical inductive target device and a k-fold symmetrical first pickup coil device and a k-fold symmetrical second pickup coil device. A combination device is configured to combine the signal from the first pickup coil device with the signal from the second pickup coil device and determine the rotation angle for angle error compensation based on the signal. Each pickup coil of the first and second pickup coil devices is rotated about a rotation axis relative to each other by a geometric offset angle. Furthermore, the entire first pickup coil assembly is rotated about a rotation axis relative to the entire second pickup coil assembly by a geometric offset angle. In one possible embodiment, the first and second pickup coil devices are electrically coupled to each other and form one or more individual pickup coil pairs, wherein in each individual pickup coil pair, a single pickup coil of the first pickup coil device is connected to a single pickup coil of the second pickup coil device in series or parallel circuits and offset therefrom by a geometric offset angle. The combination device is designed to determine the rotation angle for angle error compensation between the stator and rotor based on the combination of signals from the interconnected individual pickup coils in one or more pickup individual coil pairs.

[0004] A measurement detection device for an inductive sensor assembly and an inductive sensor assembly having at least one such measurement detection device are known from DE 10 2022 211 560A1 subsequently published by the applicant. The measurement detection device includes a circuit carrier that covers the motion path of a coupling device having at least one conductive coupling element. The coupling device is coupled to a moving body whose motion is to be detected. The circuit carrier includes at least one receiving structure comprising at least one receiving coil having at least two windings connected in series. A single winding of the at least one receiving coil has two loop structures with periodically repeating loop segments and extends through the motion path of the coupling device, and is formed in at least two layers of the circuit carrier. Portions of the respective loop structures arranged in different layers of the circuit carrier are electrically connected to each other via through contacts. The periodically repeating loop segments in the two loop structures of each coil have opposite directions of passage. The loop structures of the at least two electrically series-connected windings of the at least one receiving coil are arranged to be offset from each other by a predetermined distance along the direction of the motion path. In this configuration, the respective loop structures of at least two windings of at least one receiving coil are separated at at least one separation point and connected to each other by at least one connecting structure, thereby establishing an electrical series connection of at least two windings. The at least one connecting structure comprises at least two connecting elements arranged in at least two parallel planes with opposite directions of passage. Since the at least one connecting structure for electrically connecting the at least two windings is located outside the receiving structure, additional radial mounting space is required to accommodate the at least two connecting elements of the at least one connecting structure.

[0005] A measurement detection device for an inductive sensor assembly and an inductive sensor assembly having at least one such measurement detection device are known from DE 10 2024 200 845A1 subsequently published by the applicant. The measurement detection device includes a circuit carrier comprising at least one receiving structure. The at least one receiving structure includes at least one receiving coil having at least two windings. A single winding of the at least one receiving coil has two loop structures with multiple circuit sections and is formed in at least two layers of the circuit carrier. Portions of the respective loop structures arranged in different layers of the circuit carrier are electrically connected to each other via through contacts. The circuit sections of the two loop structures of the respective windings have opposite directions of passage. Furthermore, the loop structures of the at least two electrically series-connected windings of the at least one receiving coil are arranged offset from each other by a predetermined distance. In this case, the ends of the respective loop structures of the at least two windings of the at least one receiving coil are connected to each other at the end regions of the corresponding receiving structures via at least one connecting structure, thereby creating an electrical series connection of the at least two windings and / or producing a reversal of the direction of passage within one of the at least two windings. Summary of the Invention

[0006] The measurement detection device for an inductive sensor assembly according to the present invention and the inductive sensor assembly according to the present invention each have the following advantages: by separating the loop structures of the two windings of the receiving coil arranged in different layers at the structurally relevant intersection, and by connecting the ends of the separated loop structures in pairs through corresponding connecting structures within the receiving structure, the two windings of the receiving coil are electrically connected in series, thereby increasing the amplitude of the induced voltage in the receiving coil and reducing the angular error of the measurement detection device or the inductive sensor assembly. By placing at least one separation point and connecting structure within the receiving structure, no additional space or installation space is required outside the receiving structure. Higher induced voltage produces a better signal-to-noise ratio and improved EMC robustness (EMC: electromagnetic compatibility). Furthermore, this enables the use of more cost-effective semiconductor amplifiers with lower gain factors.

[0007] Embodiments of the present invention provide a measurement detection device for an inductive sensor assembly for detecting rotational motion, comprising a circuit carrier and at least one receiving structure disposed on the circuit carrier, the receiving structure covering an annulus and including at least one receiving coil having at least two windings. Each winding of the at least one receiving coil has two loop structures with periodically repeating loop segments, and is formed in at least two layers of the circuit carrier. The segments of the respective loop structures disposed in different layers of the circuit carrier are electrically connected to each other via through contacts. Here, the loop structures of at least two resistors of the at least one receiving coil are arranged offset from each other at a predetermined distance angle and are separated at at least one separation point, which is formed within the at least one receiving structure at the structure-related intersection of the corresponding loop structures disposed in different layers. At at least one first separation point, the two loop structures of two different windings of the at least one receiving coil are separated, and the ends of the two separated loop structures are connected to each other in pairs via a connecting structure, such that the two windings are electrically connected in series.

[0008] The term "within the receiving structure" is understood herein to mean that the separation portion and the connecting structure are arranged within the surface covered by the receiving structure. In embodiments of the invention, the receiving structure covers a closed annulus having an inner diameter r_i and a larger outer diameter r_a. This means that at least one separation portion and two connecting structures for connecting the ends of the separated loop structures are arranged within the closed annulus. Furthermore, the loop structures of the two windings to be connected of at least one receiving coil do not terminate at the corresponding separation portion, but are merely separated, such that the ends of the separated loop structures of the first winding can be connected in pairs to the ends of the separated loop structures of the second winding via connecting structures.

[0009] Furthermore, an inductive sensor assembly for detecting the rotational motion of a movable body is proposed, comprising at least one movable coupling device coupled to the movable body, and such a measurement detection device. Here, at least one excitation structure is arranged on the circuit carrier of the measurement detection device. The at least one excitation structure is coupled to an evaluation and control unit, which is designed to couple a periodic alternating signal to the at least one excitation structure during operation. The at least one movable coupling device is designed to influence the inductive coupling between the at least one excitation structure and the at least one receiving structure of the measurement detection device. The at least one evaluation and control unit is also designed to receive and evaluate the signal induced in the at least one receiving structure and determine the current position of the movable body.

[0010] At least one excitation structure can be understood as an excitation coil having a predetermined number of windings, which transmits an alternating signal coupled by an evaluation and control unit. Here, the excitation coil can surround the receiving structure from the outside and / or the inside. This means that the windings of the excitation coil can be arranged either outside the outer diameter r_a of the torus covered by the receiving structure or inside the inner diameter r_i of the torus covered by the receiving structure. As a further alternative, the windings of the excitation coil can be arranged either outside the outer diameter r_a of the torus covered by the receiving structure or inside the inner diameter r_i of the torus covered by the receiving structure. It is also possible for the excitation structure and the receiving structure to at least partially overlap in different layers or layers of the circuit carrier.

[0011] Inductive sensor assemblies can be designed, for example, as rotational angle sensors or rotor position sensors, where a movable body performs the rotational motion to be detected about a rotational axis. At least one coupling device includes at least one conductive coupling element. A high-frequency current coupled to the evaluation and control unit flows through at least one excitation coil, which generates an alternating magnetic field that induces eddy currents in the at least one coupling device. The inductive coupling between the at least one excitation coil and at least one receiving coil depends on the angular position of the respective coupling device. From the voltage signal induced in the at least one receiving coil, the evaluation and control unit can infer the electrical rotation angle of the coupling device and the current rotation angle of the shaft or rotor.

[0012] Currently, the evaluation and control unit can be understood as an electrical component or circuit that prepares, processes, or evaluates detected sensor signals. Preferably, the evaluation and control unit can be designed as an ASIC module (ASIC: Application-Specific Integrated Circuit). The evaluation and control unit can have at least one interface, which can be implemented in hardware and / or software. In a hardware-based design, the interface can be part of an ASIC module. However, the interface may also be a separate integrated circuit or at least partially composed of discrete components. In a software-based design, the interface can be a software module, for example, existing on a microcontroller along with other software modules.

[0013] The measures and extensions listed in the preferred embodiments enable advantageous improvements to the measurement detection device for the inductive sensor assembly according to the invention and to the inductive sensor assembly according to the invention.

[0014] A particularly advantageous feature is that two loop structures of the same winding of at least one receiving coil can be separated at at least one second separation point, and the ends of the two separated loop structures can be connected in pairs to each other through corresponding connecting structures, such that the corresponding first loop structure is connected to the second loop structure of the same winding. Thus, two reversal points can be achieved in the winding, by reversing the direction at these two reversal points. If the direction before the connecting structure is clockwise, then it extends counterclockwise after the connecting structure, and vice versa.

[0015] In an advantageous configuration of the measuring value detection device, the corresponding loop structure can have opposite passing directions at the structurally related intersections forming at least one separation section. Here, at least one connecting structure can, for example, connect a first loop structure of one winding with a first passing direction to a second loop structure of another winding with a second passing direction opposite to the first passing direction. Thus, for example, the first loop structure of the first winding can be electrically connected to the second loop structure of the second winding through a first connecting structure, and the second loop structure of the first winding can be electrically connected to the first loop structure of the second winding through a second connecting structure. Here, the passing direction also changes at the connecting structure. If the passing direction before the connecting structure is clockwise, then it extends counterclockwise after the connecting structure, and vice versa.

[0016] In another advantageous configuration of the measurement detection device, the number of separation sections can be based on the number of windings of at least one receiving coil to be connected in series. Preferably, the number of separation sections or connection structure pairs of at least one receiving coil can be calculated according to formula (G1).

[0017] N = (2*nw) – 1(G1)

[0018] Here, N corresponds to the number of separation sections, and nw corresponds to the number of windings of at least one receiving coil.

[0019] In another advantageous configuration of the measuring value detection device, at least two first separation points can be arranged radially spaced apart from each other along a common centerline, at which the two loop structures of two different windings are separated respectively. The unaffected winding of the receiving coil can continue to extend above and / or below the separation points without interruption. This configuration can be used advantageously, especially when the number of cycles in the receiving structure is small, and the separation points can be arranged in a space-saving manner.

[0020] In another advantageous configuration of the measuring device, at least one connection structure may include at least one through contact. Additionally, at least one connection structure may include at least one connecting element that connects the respective ends of the separate loop structures to the through contact. Typically, the protruding edge of the through contact is sufficient to electrically connect the separate loop structures to the corresponding through contact. To achieve sufficient spacing between connection structures designed as through contacts, appropriately short connecting elements can be used to electrically connect the separate loop structures to the corresponding through contacts. Thus, the position of the through contact pair can be slightly adjusted to avoid short circuits or violations of design rules. For example, a violation of design rules can be understood as the minimum distance between the two through contacts of the through contact pair being exceeded, or the minimum distance between one of the two through contacts and the adjacent conductor track being exceeded.

[0021] In another advantageous configuration of the measurement detection device, the periodically repeating loop segments of the two loop structures can respectively correspond to a complete cycle of a sine wave, a rectangular wave, a triangular wave, or a hybrid form. Here, the number of periodically repeating loop segments can define the periodicity of at least one receiving structure.

[0022] Embodiments of the present invention are illustrated in the accompanying drawings and explained in more detail in the following description. In the drawings, the same reference numerals denote parts or elements that perform the same or similar functions. Attached Figure Description

[0023] Figure 1 A schematic plan view of a first embodiment of an inductive sensor assembly according to the present invention is shown, the inductive sensor assembly having a first embodiment of a measurement value detection device according to the present invention, wherein the circuit carrier and coupling device of the measurement value detection device are transparently shown;

[0024] Figure 2 Show Figure 1 A schematic plan view of a first alternative embodiment of the receiving coil of the measurement value detection device according to the present invention, wherein no circuit carrier is present;

[0025] Figure 3 Show Figure 2 Detailed view III;

[0026] Figure 4 Show Figure 1 A schematic plan view of a second alternative embodiment of the receiving coil of the measurement value detection device according to the present invention, wherein no circuit carrier is present. Detailed Implementation

[0027] from Figures 1 to 4 As can be seen, the illustrated embodiment of the measurement value detection device 10 for detecting rotational motion of the inductive sensor assembly 1 according to the present invention includes a circuit carrier 12 and at least one receiving structure 14 disposed on the circuit carrier 12. The receiving structure covers a ring and includes at least one receiving coil 16 having at least two windings W. Each winding W of the at least one receiving coil 16 has two loop structures 18A and 18B, each loop structure having a periodically repeating loop portion, and is formed in at least two layers of the circuit carrier 12. The sections of the respective loop structures 18A and 18B arranged in different layers of the circuit carrier 12 are electrically connected to each other through a through contact DK. The loop structures 18A and 18B of the at least two windings W of the at least one receiving coil 16 are offset from each other by a predetermined distance angle DW, and are separated at at least one separation point T, which is formed in the at least one receiving structure 14 at the structurally related intersection point KP of the corresponding loop structures 18A and 18B arranged in different planes. Here, at at least one first separation point T1, T2, T3, T4, 1T1, 1T2, 2T1, 2T2, two loop structures 18A, 18B of two different windings W of at least one receiving coil 16 are separated, and the ends of the two separated loop structures 18A, 18B are connected to each other in pairs through corresponding connection structures V, so that the two windings W are connected in series.

[0028] from Figures 1 to 4 It can be further seen that the two loop structures 18A and 18B of the same winding W of at least one receiving coil 16 are separated at at least one second separation point 1TU and 2TU, and the ends of the two separated loop structures 18A and 18B are connected to each other in pairs through corresponding connection structures V, so that the corresponding first loop structure 18A is connected to the second loop structure 18B of the same winding W.

[0029] The illustrated embodiment of the measurement detection device 10 according to the invention is used in an inductive sensor assembly 1 designed as a rotation angle sensor or a rotor position sensor, wherein the movable body 3 is designed as a shaft 3A and performs the rotational motion to be detected about the rotation axis. Therefore, the distance between the loop structures 18A, 18B of at least two electrically connected windings W of at least one receiving coil 16 corresponds to a predetermined distance angle DW.

[0030] from Figure 1Furthermore, it can be seen that the illustrated embodiment of the inductive sensor assembly 1 for detecting the rotational motion of a movable body 3 according to the present invention includes: a motion coupling device 5 coupled to the movable body 3; and a measurement detection device 10 according to the present invention. An excitation structure 13 is arranged on the circuit carrier 12 of the measurement detection device 10. At least one excitation structure 13 is coupled to an evaluation and control unit 9, which is designed to couple a periodically alternating signal to the excitation structure 13 during operation. The motion coupling device 5 is designed to influence the inductive coupling between the excitation structure 13 and the receiving structure 14 of the measurement detection device 10. At least one evaluation and control unit 9 is also designed to receive and evaluate the signal sensed in the receiving structure 14 and determine the current position of the movable body 3. In the illustrated embodiment of the inductive sensor assembly 1, the excitation structure 13 has an excitation coil 13A arranged radially outside the receiving structure 14 and surrounding the receiving structure 14 from the outside.

[0031] from Figure 1 It can also be seen that, in the illustrated embodiment, the coupling device 5, shown in dashed lines, includes a base 6 designed as a rotor 6A, which has three conductive coupling segments 7 designed as blades 7A. The base 6 of the coupling device 5 is rotatably and fixedly connected to the shaft 3A.

[0032] from Figure 1 Furthermore, it can be seen that the receiving structure 14 of the measuring value detection device 10A includes two receiving coils 16, each with two windings 1W1, 1W2, 2W1, and 2W2, and each with two loop structures 18A and 18B. Each loop structure has three periodically repeating loop segments, giving the receiving structure 14 or the receiving coil 16 a period of three (p = 3). The number nw of windings 1W1, 1W2, 2W1, and 2W2 corresponds to the value 2. The three periodically repeating loop segments of the first receiving coil 16A correspond to a complete cycle of a sine wave. The three periodically repeating loop segments of the second receiving coil 16B correspond to a complete cycle of a cosine wave. From... Figure 1Furthermore, it can be seen that the loop structures 18A and 18B of each winding 1W1, 1W2, 2W1, 2W2 are arranged in sections of the two receiving coils 16 on different layers of the circuit carrier 12, respectively, corresponding to half a cycle of the repeating loop section. The sections of the periodically repeating loop section arranged in different layers of the circuit carrier 12 are electrically connected to each other through the through contact DK. The two loop structures 18A and 18B of each winding 1W1, 1W2, 2W1, 2W2 are offset from each other and have opposite directions of passage. By arranging the two loop structures 18A and 18B with opposite directions of passage and offset from each other, surfaces with different orientations of magnetic fields are induced between the first loop structure 18A and the second loop structure 18B of each winding 1W1, 1W2, 2W1, 2W2 of the receiving coil 16. When the period of the receiving coil 16 is p=3, the three faces A1 and A2 are respectively enclosed between the two circuit structures 18A and 18B of the two series windings 1W1, 1W2, 2W1, and 2W2 of the two receiving coils 16.

[0033] The number N of the separation points T of each receiving coil 16 is calculated according to formula (G1) and is based on the number nw of the windings 1W1, 1W2, 2W1, and 2W2 of the receiving coil 16. Figure 1 It can also be seen that, in the illustrated embodiment, the first receiving coil 16A and the second receiving coil 16B each have three separation portions T. Furthermore, the corresponding loop structures 18A and 18B have opposite directions of passage at the structurally related intersection KP, where the separation portions T are formed.

[0034] from Figure 1As can be further seen, the first receiving coil 16A has two first separation sections 1T1 and 1T2, where the loop structures 18A and 18B of the two windings 1W1 and 1W2 are separated. The ends of the two separated loop structures 18A and 18B are connected in pairs through corresponding connection structures 1V1, 1V2, 1V3, and 1V4, thus connecting the two windings 1W1 and 1W2 of the first receiving coil 16A in series. Furthermore, the first receiving coil 16A has a second separation section 1TU, where the two loop structures 18A and 18B of the first winding 1W1 of the first receiving coil 16A are separated. The ends of the two separated loop structures 18A and 18B are connected in pairs through corresponding connection structures 1V5 and 1V6, thus connecting the first loop structure 18A to the second loop structure 18B of the first winding 1W1. Thus, connection structures 1V5 and 1V6 form two reversal points at the second separation point 1TU, and the direction of the first winding 1W1 of the first receiving coil 16A changes at these reversal points. Starting from the first connection structure 1V1 at the first separation point 1T1, the first loop structure 18A of the first winding 1W1 of the first receiving coil 16A extends clockwise to the fifth connection structure 1V5 at the second separation point 1TU. The fifth connection structure 1V5 connects the first loop structure 18A of the first winding 1W1 to the second loop structure 18B of the first winding 1W1. Thus, by changing direction and extending the second loop structure 18B of the first winding 1W1 counterclockwise, it extends to the third connection structure 1V3 at another first separation point 1T2. The third connection structure 1V3 connects the second loop structure 18B of the first winding 1W1 to the first loop structure 18A of the second winding 1W2. Thus, by changing direction and extending the first loop structure 18A of the second winding 1W2 clockwise, it extends to the fourth connection structure 1V4 at another first separation point 1T2. The fourth connection structure 1V4 connects the first loop structure 18A of the second winding 1W2 to the second loop structure 18B of the first winding 1W1. Thus, by changing direction, the second loop structure 18B of the first winding 1W1 extends counterclockwise to the sixth connection structure 1V6 at the second separation point 1TU. The sixth connection structure 1V6 connects the second loop structure 18B of the first winding 1W1 to the first loop structure 18A of the first winding 1W1. Thus, by changing direction, the first loop structure 18A of the first winding 1W1 extends clockwise to the second connection structure 1V2 at the first separation point 1T1. The second connection structure 1V2 connects the first loop structure 18A of the first winding 1W1 to the second loop structure 18B of the second winding 1W2. Thus, by changing direction, the second loop structure 18B of the second winding 1W2 extends counterclockwise until it reaches the first connection structure 1V1 at the first separation point 1T1.Therefore, the two windings 1W1 and 1W2 of the first receiving coil 16A are connected in series.

[0035] Similarly, the second receiving coil 16B has two first separation sections 2T1 and 2T2, where the loop structures 18A and 18B of the two windings 2W1 and 2W2 are separated. The ends of the two separated loop structures 18A and 18B are connected in pairs via corresponding connecting structures 2V1, 2V2, 2V3, and 2V4, thus connecting the two windings 2W1 and 2W2 of the second receiving coil 16B in series. Furthermore, the second receiving coil 16B has a second separation section 2TU, where the two loop structures 18A and 18B of the second winding 2W2 of the second receiving coil 16B are separated. The ends of the two separated loop structures 18A and 18B are connected in pairs via corresponding connecting structures 2V5 and 2V6, thus connecting the first loop structure 18A with the second loop structure 18B of the second winding 2W2. Thus, the connecting structures 2V5 and 2V6 form two reversal points at the second separation section 1TU, where the direction of the second winding 2W2 of the second receiving coil 16B changes. Starting from the first connection structure 2V1 at the first separation point 2T1, the first loop structure 18A of the second winding 2W2 of the second receiving coil 16B extends clockwise to the fifth connection structure 2V5 at the second separation point 2TU. The fifth connection structure 2V5 connects the first loop structure 18A of the second winding 2W2 to the second loop structure 18B of the second winding 2W2. Then, by changing direction, the second loop structure 18B of the second winding 2W2 extends counterclockwise to the third connection structure 2V3 at another first separation point 2T2. The third connection structure 2V3 connects the second loop structure 18B of the second winding 2W2 to the first loop structure 18A of the first winding 2W1. Then, by changing direction, the first loop structure 18A of the first winding 2W1 extends clockwise to the fourth connection structure 2V4 at another first separation point 2T2. The fourth connection structure 2V4 connects the first loop structure 18A of the first winding 2W1 to the second loop structure 18B of the second winding 2W2. Therefore, by changing direction, the second circuit structure 18B of the second winding 2W2 extends counterclockwise until it reaches the sixth connection structure 2V6 at the second separation point 2TU. The sixth connection structure 2V6 connects the second circuit structure 18B of the second winding 2W2 to the first circuit structure 18A of the second winding 2W2. Therefore, by changing direction, the first circuit structure 18A of the second winding 2W2 extends clockwise until it reaches the second connection structure 2V2 at the first separation point 2T1. The second connection structure 2V2 connects the first circuit structure 18A of the second winding 2W2 to the second circuit structure 18B of the first winding 2W1. Therefore, by changing direction, the second circuit structure 18B of the first winding 2W1 extends counterclockwise until it reaches the first connection structure 2V1 at the first separation point 2T1. Thus, the two windings 2W1 and 2W2 of the second receiving coil 16B are connected in series.

[0036] from Figure 1 Further analysis reveals that the two first separation points 1T1 and 1T2 of the first receiving coil 16A, and the two loop structures 18A and 18B of the two different windings 1W1 and 1W2, separate at these points, with these two first separation points arranged radially spaced apart from each other on a common first center line G1. Simultaneously, the first loop structure 18A of the two windings 2W1 and 2W2 of the second receiving coil 16B intersects at the first center line G1 above the two first separation points 1T1 and 1T2. The second loop structure 18B of the two windings 2W1 and 2W2 of the second receiving coil 16B intersects at the first center line G1 below the two first separation points 1T1 and 1T2. Furthermore, the two first separation points 2T1 and 2T2 of the second receiving coil 16B (where the two loop structures 18A and 18B of the two different windings 1W1 and 1W2 separate) are arranged radially spaced apart from each other on a common second center line G2. Simultaneously, the first loop structure 18A of the two windings 1W1 and 1W2 of the first receiving coil 16A intersects at the second center line G2 above the two first separation points 2T1 and 2T2. The second loop structure 18B of the two windings 1W1 and 1W2 of the first receiving coil 16A intersects at the second center line G2 below the two first separation points 2T1 and 2T2.

[0037] from Figures 2 to 4 As can be further seen, in further embodiments of the receiving coils 16C and 16D of the illustrated measurement detection device 10, three windings W1, W2, and W3 are respectively included. These windings each have two loop structures 18A and 18B, each loop structure having three periodically repeating loop segments, such that the receiving coil 16 has a period of three (p=3). The number nw of windings W1, W2, and W3 corresponds to the value 3. The three periodically repeating loop segments of the receiving coils 16C and 16D each correspond to a complete cycle of a sine wave. Figure 1It can also be seen that the segments of the loop structures 18A and 18B of the windings W1, W2, and W3 of the receiving coils 16C and 16D arranged on different layers of the circuit carrier 12 correspond to half a cycle of the repeating loop segment. The segments of the periodically repeating loop segment arranged in different layers of the circuit carrier 12 are electrically connected to each other through the through contact DK. The two loop structures 18A and 18B of each winding W1, W2, and W3 are offset from each other and have opposite directions of passage. Since the two loop structures 18A and 18B are offset from each other with opposite directions of passage, a surface with magnetic fields of different directions is induced between the first loop structure 18A and the second loop structure 18B of each winding W1, W2, and W3 of the receiving coil 16. When the period of the receiving coils 16C and 16D is p=3, the three faces A1 and A2 are enclosed between the two loop structures 18A and 18B of the two series-connected windings W1, W2 and W3 of the receiving coils 16C and 16D.

[0038] from Figures 2 to 4 As can be further seen, the receiving coils 16C and 16D in the illustrated embodiment each have five separation sections T. Furthermore, the corresponding loop structures 18A and 18B have opposite directions of passage at the structurally related intersection KP that forms the separation sections T.

[0039] from Figures 2 to 4 As can be further seen, the receiving coils 16C and 16D shown have four first separation points T1, T2, T3, and T4. The loop structures 18A and 18B of two of the three windings W1, W2, and W3 are separated at these first separation points. The ends of the separated loop structures 18A and 18B are connected in pairs to each other through corresponding connection structures V1, V2, V3, V4, V5, V6, V7, and V8, so that the two corresponding windings W1, W2, and W3 of the receiving coils 16C and 16D are connected in series. Furthermore, the receiving coils 16C and 16D have a second separation point TU. The two loop structures 18A and 18B of the first winding W1 of the receiving coil 16 are separated at this second separation point TU, and the ends of the separated loop structures 18A and 18B are connected in pairs to each other through corresponding connection structures V9 and V10, so that the first loop structure 18A is connected to the second loop structure 18B of the first winding W1. As a result, the connecting structures V9 and V10 form two reversal points at the second separation point TU, and the direction of the first winding W1 of the receiving coils 16C and 16D changes at this second separation point TU.

[0040] from Figure 2 and Figure 3As can be further seen, at the first separation point T1 and the second separation point T2 of the receiving coil 16C, the two loop structures 18A and 18B of the first winding W1 and the second winding W2 are separated and radially spaced apart from each other on a common first center line G1. Simultaneously, the second loop structure 18B of the third winding W3 intersects the first center line G1 above the two first separation points T1 and T2, and the first loop structure 18A of the third winding W3 intersects the first center line G1 below the two first separation points T1 and T2. Furthermore, the third first separation point T3 and the fourth first separation point T4 of the receiving coil 16C are radially spaced apart on a common second center line G2, and the two loop structures 18A and 18B of the second winding W2 and the third winding W3 are separated at each first separation point T3 and T4. Meanwhile, the first loop structure 18A of the first winding W1 intersects the second center line G2 above the two first separation points T3 and T4, and the second loop structure 18B of the first winding W1 intersects the second center line G2 below the two first separation points T1 and T2.

[0041] Starting from the first connection structure V1 at the first separation point T1, the first loop structure 18A of the first winding W1 of the receiving coil 16C extends clockwise to the tenth connection structure V10 at the second separation point TU. The tenth connection structure V10 connects the first loop structure 18A of the first winding W1 to the second loop structure 18B of the first winding W1. Thus, by changing direction, the second loop structure 18B of the first winding W1 extends counterclockwise to the third connection structure V3 at the second separation point T2. The third connection structure V3 connects the second loop structure 18B of the first winding W1 to the first loop structure 18A of the second winding W2. Thus, by changing direction, the first loop structure 18A of the second winding W2 extends clockwise to the seventh connection structure V7 at the fourth separation point T4. The seventh connection structure V7 connects the first loop structure 18A of the second winding W2 to the second loop structure 18B of the third winding W3. Therefore, by changing direction, the second loop structure 18B of the third winding W3 extends counterclockwise until the eighth connecting structure V8 at the fourth first separation point T3. The eighth connecting structure V8 connects the second loop structure 18B of the third winding W3 to the first loop structure 18A of the second winding W2. Therefore, by changing direction, the first loop structure 18A of the second winding W2 extends clockwise until the fourth connecting structure V4 at the second first separation point T2. The fourth connecting structure V4 connects the first loop structure 18A of the second winding W2 to the second loop structure 18B of the first winding W1. Therefore, by changing direction, the second loop structure 18B of the first winding W1 extends counterclockwise until the ninth connecting structure V9 at the second separation point TU. The ninth connecting structure V9 connects the second loop structure 18B of the first winding W1 to the first loop structure 18A of the first winding W1. Therefore, by changing direction, the first loop structure 18A of the first winding W1 extends clockwise until the second connecting structure V2 at the first separation point T1. The second connection structure V2 connects the first loop structure 18A of the first winding W1 to the second loop structure 18B of the second winding W2. Thus, by changing direction, the second loop structure 18B of the second winding W2 extends counterclockwise to the sixth connection structure V6 at the third first separation point T3. The sixth connection structure V6 connects the second loop structure 18B of the second winding W2 to the first loop structure 18A of the third winding W3. Thus, by changing direction, the first loop structure 18A of the third winding W3 extends clockwise to the fifth connection structure V5 at the third first separation point T3. The fifth connection structure V5 connects the first loop structure 18A of the third winding W3 to the second loop structure 18B of the second winding W2. Thus, by changing direction, the second loop structure 18B of the second winding W2 extends counterclockwise to the first connection structure V1 at the first separation point T1.Therefore, the three windings W1, W2, and W3 of the receiving coil 16C are connected in series.

[0042] from Figure 4 Furthermore, it can be seen that, with Figure 3 and Figure 4 Compared to the receiving coil 16C shown, it is comparable to Figure 2 , Figure 3 different, Figure 4The first separation points T1, T2, T3, and T4 of the receiving coil 16D shown are not located on a common centerline. Starting from the first connection structure V1 at the first separation point T1, the first loop structure 18A of the second winding W2 of the receiving coil 16D extends clockwise until the seventh connection structure V7 at the fourth first separation point T4. The seventh connection structure V7 connects the first loop structure 18A of the second winding W2 to the second loop structure 18B of the third winding W3. Then, by changing direction, the second loop structure 18B of the third winding W3 passes counterclockwise until the eighth connection structure V8 at the fourth first separation point T4. The eighth connection structure V8 connects the second loop structure 18B of the third winding W3 to the first loop structure 18A of the second winding W2. Then, by changing direction, the first loop structure 18A of the second winding W2 extends clockwise until the second connection structure V2 at the first separation point T1. The second connection structure V2 connects the first loop structure 18A of the second winding W2 to the second loop structure 18B of the first winding W1. Therefore, by changing direction, the second loop structure 18B of the first winding W1 extends counterclockwise until the tenth connecting structure V10 at the second separation point TU. The tenth connecting structure V10 connects the second loop structure 18B of the first winding W1 to the first loop structure 18A of the first winding W1. Therefore, by changing direction, the first loop structure 18A of the first winding W1 extends clockwise until the third connecting structure V3 at the second first separation point T2. The third connecting structure V3 connects the first loop structure 18A of the first winding W1 to the second loop structure 18B of the second winding W2. Therefore, by changing direction, the second loop structure 18B of the second winding W2 extends counterclockwise until the sixth connecting structure V6 at the third first separation point T3. The sixth connecting structure V6 connects the second loop structure 18B of the second winding W2 to the first loop structure 18A of the third winding W3. Therefore, by changing direction, the first loop structure 18A of the third winding W3 extends clockwise until the fifth connecting structure V5 at the third first separation point T3. The fifth connection structure V5 connects the first loop structure 18A of the third winding W3 to the second loop structure 18B of the second winding W2. Thus, by changing direction, the second loop structure 18B of the second winding W2 extends counterclockwise to the fourth connection structure V4 at the second first separation point T2. The fourth connection structure V4 connects the second loop structure 18B of the second winding W2 to the first loop structure 18A of the first winding W1. Thus, by changing direction, the first loop structure 18A of the first winding W1 extends clockwise to the ninth connection structure V9 at the second separation point TU. The ninth connection structure V9 connects the first loop structure 18A of the first winding W1 to the second loop structure 18B of the first winding W1.Thus, by changing direction, the second loop structure 18B of the first winding W1 extends counterclockwise until the first connection structure V1 at the first separation point T1. Therefore, the three windings W1, W2, and W3 of the receiving coil 16D are electrically connected in series.

[0043] from Figures 1 to 4 Further analysis reveals that the connection structure V includes at least one through contact DK. Especially from... Figure 3 As can be seen from this, the connection structure V may include at least one connecting element 19, which connects the respective ends of the separate loop structures 18A and 18B to the through contact DK. From... Figure 3 Furthermore, it can be seen that at the first separation point T1, the first short-connecting element 19A connects the first circuit structure 18A of the first winding W1 to the corresponding through contact DK. The second short-connecting element 19B connects the second circuit structure 18B of the second winding W2 to the corresponding through contact DK. Additionally, the first short-connecting element 19A connects the second circuit structure 18B of the second winding W2 to the corresponding through contact DK. The second short-connecting element 19B connects the first circuit structure 18A of the first winding W1 to the corresponding through contact DK. From... Figure 3 As can be further seen, at the second separation point T2, the first short-connecting element 19A connects the first circuit structure 18A of the second winding W2 to the corresponding through contact DK. The second short-connecting element 19B connects the second circuit structure 18B of the first winding W1 to the corresponding through contact DK. Furthermore, the first short-connecting element 19A connects the second circuit structure 18B of the first winding W1 to the corresponding through contact DK. The second short-connecting element 19B connects the first circuit structure 18A of the second winding W2 to the corresponding through contact DK.

[0044] In the illustrated embodiment of the receiving coil 16, the angular distance between adjacent loop structures is the same. Equal distances maximize the use of available installation space, thereby maximizing the number of windings while avoiding violations of design rules. Furthermore, the loop structures 18A, 18B of the individual windings W of the receiving coil 16 are designed to be approximately congruent. Figure 1 Further, it can be seen that the loop structures 18A and 18B of the windings W of the two receiving coils 16A and 16B are arranged in groups after the receiving coils 16A and 16B. This means that for each receiving coil 16A and 16B, the two windings 1W1, 1W2, 2W1, and 2W2 are arranged first, followed by the three loop structures 18A and 18B of the two windings 1W1 and 1W2 of the first receiving coil 16A, and then the two loop structures 18A and 18B of the two windings 2W1 and 2W2 of the second receiving coil 16B.

Claims

1. A measurement detection device (10) for detecting rotational motion of an inductive sensor assembly (1), comprising a circuit carrier (12) and at least one receiving structure (14) disposed on the circuit carrier (12), the at least one receiving structure covering an annulus and comprising at least one receiving coil (16) having at least two windings (W), wherein each winding (W) of the at least one receiving coil (16) has two loop structures (18A, 18B) having periodically repeating loop segments and is formed in at least two layers of the circuit carrier (12), wherein the segments of each loop structure (18A, 18B) disposed in different layers of the circuit carrier (12) are electrically connected to each other by a through contact (DK), wherein the at least two windings of the at least one receiving coil (16) have at least two windings (W) having at least two windings (W) ... The loop structures (18A, 18B) of the group (W) are arranged staggered from each other at a predetermined distance angle (DW) and are separated at at least one separation point (T), which is constructed in the at least one receiving structure (14) at the structure-related intersection (KP) of the corresponding loop structures (18A, 18B) arranged in different levels. At at least one first separation point (T1, T2, T3, T4, 1T1, 1T2, 2T1, 2T2), the two loop structures (18A, 18B) of the two different windings (W) of the at least one receiving coil (16) are separated, and the ends of the separated two loop structures (18A, 18B) are connected to each other in pairs through corresponding connection structures (V), so that the two windings (W) are electrically connected in series.

2. The measurement value detection device (10) according to claim 1, characterized in that, The two loop structures (18A, 18B) of the same winding (W) of the at least one receiving coil (16) are separated at at least one second separation point (TU, 1TU, 2TU), and the ends of the separated two loop structures (18A, 18B) are connected to each other in pairs through corresponding connection structures (V), such that the corresponding first loop structure (18A) is connected to the second loop structure (18B) of the same winding (W).

3. The measurement value detection device (10) according to claim 1 or 2, characterized in that, At the structurally related intersection (KP) where the at least one separation portion (T) is formed, the corresponding loop structures (18A, 18B) have opposite passing directions.

4. The measurement value detection device (10) according to claim 3, characterized in that, The at least one connection structure (V) connects the first loop structure (18A) of one winding of the two windings (W) having a first passing direction to the second loop structure of the other winding (W) of the two windings (W) having a second passing direction opposite to the first passing direction.

5. The measuring value detection device (10) according to any one of claims 1 to 4, characterized in that, The number of separation sections (T) is based on the number of windings (W) of the at least one receiving coil (16) to be connected in series.

6. The measuring value detection device (10) according to any one of claims 1 to 5, characterized in that, At least two first separation points (T1, T2, T3, T4, 1T1, 1T2, 2T1, 2T2) are arranged radially spaced apart on a common centerline (G1, G2), at which two loop structures (18A, 18B) of two different windings (W) are separated respectively.

7. The measuring value detection device (10) according to any one of claims 1 to 6, characterized in that, The at least one connection structure (V) includes at least one through contact (DK).

8. The measuring value detection device (10) according to claim 7, characterized in that, The at least one connection structure (V) includes at least one connection element (19) that connects the respective ends of the separated loop structures (18A, 18B) to the through contact (DK).

9. The measuring value detection device (10) according to any one of claims 1 to 8, characterized in that, The periodically repeating loop segments of the two loop structures (18A, 18B) correspond to a complete cycle of a sine wave, a rectangular wave, a triangular wave, or a hybrid form, respectively, wherein the number of periodically repeating loop segments defines the periodicity of the at least one receiving structure (14).

10. An inductive sensor assembly (1) for detecting rotational motion of a movable body (3), the inductive sensor assembly having at least one movable coupling device (5) coupled to the movable body (3), and having a measurement detection device (10) according to any one of claims 1 to 9, wherein at least one excitation structure (13) is arranged on a circuit carrier (12) of the measurement detection device (10), wherein the at least one excitation structure (13) is coupled to an evaluation and control unit (9), the evaluation and control unit being designed to couple a periodic alternating signal to the at least one excitation structure (13) during operation, wherein the at least one movable coupling device (5) is designed to influence the inductive coupling between the at least one excitation structure (13) and at least one receiving structure (14) of the measurement detection device (10), wherein the at least one evaluation and control unit (9) is also designed to receive and evaluate the signal induced in the at least one receiving structure (14) and determine the current position of the movable body (3).

11. The inductive sensor assembly (1) according to claim 10, characterized in that, The at least one excitation structure (13) includes an excitation coil (13A) that surrounds the receiving structure (14) from the outside and / or inside.

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