Measured value detection device for inductive sensor arrangement

Abstract

To provide a measured value detection device and an inductive sensor arrangement having at least one measured value detection device.SOLUTION: A measured value detection device includes a circuit carrier, which comprises a receiving structure, which comprises a receiving coil having electrically connected windings in series. A single winding comprises two loop structures having periodically repeating loop portions and is formed on a plane of the circuit carrier. Portions of the individual loop structures are electrically connected to each other via through-hole contacts. Loop portions of the individual windings have opposite travel directions. The loop structures of the windings that are electrically connected in series are arranged in a direction of the movement path offset from one another by a predetermined distance. The individual loop structures of the windings are separated at a separation point and are connected to each other via a connecting structure such that an electrical series circuit of the winding is formed. The connecting structure comprises connecting elements that are arranged on parallel planes and have opposite travel directions.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The invention relates to a measured value detection device for an inductive sensor arrangement. The subject of the invention is also an inductive sensor arrangement which comprises at least one such measured value detection device. [Background technology]

[0002] From the prior art, inductive rotor position sensors are known which have at least one excitation structure, at least one coupling device, also called target, arranged on the shaft of the rotor to be measured, and at least one receiving structure. Furthermore, the at least one excitation structure comprises at least one excitation coil. The at least one coupling device comprises at least one electrically conductive coupling element. The at least one receiving structure comprises at least one receiving coil, but more often two receiving coils. A high-frequency current flows through the at least one excitation coil, which generates an alternating magnetic field, which induces eddy currents in the at least one coupling device. In this case, the inductive coupling between the at least one excitation coil and the at least one receiving coil is dependent on the angular position of the corresponding coupling device. By means of the voltage signal induced in the at least one receiving coil, the electrical rotation angle of the coupling device and the current rotation angle of the shaft or rotor can be deduced.

[0003] German Patent Application No. DE 10 2020206396 A1 discloses an inductive angle sensor with an inductive target arrangement with k-fold symmetry, a first pickup coil arrangement with k-fold symmetry and a second pickup coil arrangement with k-fold symmetry. A combination device is provided for combining the signals of the first pickup coil arrangement with the signals of the second pickup coil arrangement and determining an angle error-compensated rotation angle on the basis of this. The single pickup coils of the first pickup coil arrangement and the single pickup coils of the second pickup coil arrangement are each offset in rotation relative to one another about the axis of rotation by a geometric offset angle. Additionally, the entire first pickup coil arrangement is offset in rotation relative to the entire second pickup coil arrangement about the axis of rotation by a geometric offset angle. In one envisaged embodiment, the first and second pickup coil devices are galvanically coupled to each other to form one or more pickup single coil pairs, in which a respective one of the pickup single coils of the first pickup coil device is connected together in a series or parallel circuit with a respective one of the pickup single coils of the second pickup coil device, the respective one being offset by a geometric offset angle with respect to the pickup single coil of the first pickup coil device, and the combination device is configured to determine a rotation angle at which the angular error between the stator and the rotor is compensated based on a combination of signals of the respective connected pickup single coils of the one or more pickup single coil pairs. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] DE 102020206396 Summary of the Invention [Problem to be solved by the invention]

[0005] Disclosure of the Invention A measurement value detection device for an inductive sensor arrangement having the features of independent claim 1 and an inductive sensor arrangement having the features of independent claim 14 each have the advantage that, due to the series circuit of the windings of the receiving coil, the amplitude of the voltage induced in the receiving coil can be increased while at the same time the angular error of the measurement value detection device or the inductive sensor arrangement can be reduced. [Means for solving the problem]

[0006] An embodiment of the invention provides a measurement value detection device for an inductive sensor device, the measurement value detection device comprising a circuit support, the circuit support covering a movement path of a coupling device with at least one electrically conductive coupling element, the coupling device being coupled to a moving body whose movement is to be detected. The circuit support comprises at least one receiving structure, the receiving structure comprising at least one receiving coil with at least two electrically serially connected windings. Each winding of the at least one receiving coil has two loop structures with periodically repeating loop sections, respectively, extending over the movement path of the coupling device and formed in at least two planes of the circuit support. Sections of the individual loop structures, which are arranged in different planes of the circuit support, are electrically connected to each other via through-hole contacts. Furthermore, the periodically repeating loop sections of the two loop structures of the individual windings have opposite directions of progression. The loop structures of the at least two electrically serially connected windings of the at least one receiving coil are arranged offset from each other by a predefined interval in the direction of the movement path. In this case, the individual loop structures of the at least two windings of the at least one receiving coil are divided at at least one dividing point and are connected to one another via at least one connecting structure such that an electrical series circuit of the at least two windings is formed, the at least one connecting structure comprising at least two connecting elements arranged in at least two parallel planes and having mutually opposite directions of progression.

[0007] The arrangement of the at least two connection elements results in a differential structure of the at least one connection structure. The advantage of such a differential structure is that it is less susceptible to interference magnetic fields. Due to the differential structure of the at least one connection structure and the opposite directions of travel of the at least two connection elements, planes formed parallel to the plane of the windings of the at least one receiving coil have opposite plane normals and are cancelled out. Thus, only a small interference component results from the planes formed by the mutual spacing of the at least two connection elements and the lengths of the at least two connection elements. Furthermore, the at least one connection structure allows any combination of the number of windings, receiving structures and receiving coils.

[0008] Furthermore, an inductive sensor device for detecting the movement of a mobile object is proposed, which comprises at least one movable coupling device coupled to the mobile object and such a measured value detection device, whereby at least one excitation structure is arranged on a circuit carrier of the measured value detection device, the at least one excitation structure is coupled to at least one oscillator circuit, which during operation feeds a periodic alternating signal into the at least one excitation structure, the at least one movable coupling device is configured to influence an inductive coupling between the at least one excitation structure and at least one receiving structure of the measured value detection device, and at least one evaluation and control unit is configured to receive and evaluate the induced signal in the at least one receiving structure and to determine the current position of the mobile object.

[0009] The inductive sensor arrangement can be configured, for example, as a rotation angle sensor or a rotor position sensor, in which case the moving body performs a rotational movement about a rotation axis to be detected, or alternatively, as a linear displacement sensor, in which case the moving body performs a linear movement to be detected.

[0010] The at least two connection elements for connecting the at least two windings in series can be arranged both inside and outside the outer contour of the at least one receiver coil. In a particularly preferred embodiment, the at least two connection elements can be arranged outside the outer contour of the at least one receiver coil in order to facilitate the parallel arrangement of the at least two connection elements of the individual connection structures and to allow the at least two connection elements to at least partially overlap. If the inductive sensor device is configured as a rotation angle sensor in which the windings of the at least one receiver coil are arranged along a circular path of movement between an inner radius and an outer radius, the at least two connection elements can be arranged in the area of ​​the inner radius and / or in the area of ​​the outer radius. The amplitude of the signal induced in the at least one receiver coil depends on the area surrounded by the windings of the at least one receiver coil. In a particularly preferred embodiment of such a rotation angle sensor, the at least two connection elements can therefore be arranged only in the area of ​​the inner radius, especially in cases where the construction space is limited, since such connection elements provided in the area of ​​the outer radius would result in an increased loss of the surrounded area. If the inductive sensor arrangement is configured as a linear displacement sensor in which the windings of at least one receiver coil are arranged along a linear path of movement between the upper edge and the lower edge, the at least two connection elements can be arranged in the area of ​​the upper edge and / or in the area of ​​the outer edge. In a particularly preferred embodiment of such a linear displacement sensor, the at least two connection elements can be arranged either in the area of ​​the upper edge or in the area of ​​the lower edge in order to reduce the loss of the area enclosed by the windings of the at least one receiver coil, especially in cases where construction space is limited.

[0011] An evaluation and control unit in this context can be understood as an electrical assembly or circuit which processes or processes or evaluates the detected sensor signals. Preferably, the evaluation and control unit can be configured as an ASIC module (ASIC: Application Specific Integrated Circuit). The evaluation and control unit can have at least one interface which can be configured by hardware and / or software. If configured by hardware, the interface can be, for example, part of the ASIC module. However, it is also possible for the interface to be a separate integrated circuit or to be at least partially configured from discrete components. If configured by software, the interface can be, for example, a software module arranged on a microcontroller adjacent to other software modules.

[0012] An excitation structure may in the following be understood to be a transmitter coil with a given number of turns, which emits an alternating signal input by at least one oscillator circuit.

[0013] The measures and developments defined in the dependent claims make it possible to advantageously improve the measurement value detection device for an inductive sensor arrangement defined in the independent claim 1 and the inductive sensor arrangement defined in the independent claim 14.

[0014] It is particularly advantageous if the at least two connection elements of the at least one connection structure, which are arranged in at least two planes, can at least partially overlap, whereby interference effects can be further reduced.

[0015] In an advantageous embodiment of the measurement detection device, the periodically repeating loop sections can correspond to a complete cycle of a sine wave curve, a square wave curve or a triangular wave curve, respectively. In this case, the number of periodically repeating loop sections can determine the periodicity of the receiving structure. Naturally, the periodically repeating loop sections can also have any other suitable shape.

[0016] In a further advantageous embodiment of the measurement value detection device, the sections of the individual loop structures which are arranged in different planes of the circuit carrier can, for example, correspond to half periods of the repeating loop sections, or alternatively, the sections which are arranged in different planes of the circuit carrier can correspond to quarter periods of the repeating loop sections.

[0017] In a further advantageous embodiment of the measurement value detection device, at least one splitting point of the individual loop structures of the at least two windings can be formed in a through-hole contact of the corresponding loop structure. Since such through-hole contacts on the two planes of the circuit carrier are already provided with contact locations and the corresponding loop structures are already split, the splitting point can be realized simply and cost-effectively, by omitting contact elements connecting the contact locations on the two planes of the circuit carrier to one another. Furthermore, one end of at least two connecting elements can each be contacted with one of the two contact locations.

[0018] In a further advantageous embodiment of the measurement value detection device, at least one evaluation and control unit can be provided for receiving and evaluating the induced signals in the at least one receiving structure. Preferably, the at least one evaluation and control unit can be inserted into one of the at least two connection elements of the at least one connection structure, such that an additional separation of the windings of the at least one receiving coil is not necessary in order to insert the at least one evaluation and control unit.

[0019] In a further advantageous embodiment of the measurement value detection device, it is possible to connect loop structures of different windings or of the same winding of at least one receiving coil to one another by means of at least one connection structure, whereby a change in the direction of travel can be brought about by means of at least two connection elements between two loop structures, which means that a corresponding connection element can connect two loop structures with different directions of travel to one another.

[0020] In a further advantageous embodiment of the measurement value detection device, the number of connection structures may be based on the number of windings of the at least one receiving coil. Preferably, the number of connection structures is calculable according to equation (G1). N=(2*n)-1 (G1) Here, N corresponds to the number of connection structures and n corresponds to the number of windings of at least one receiving coil.

[0021] In a further advantageous embodiment of the measurement value detection device, the spacing of adjacent loop structures of the at least one receiving structure can be based on the number of receiving structures, the number of receiving coils, the number of windings of the at least one receiving coil and the periodicity of the at least one receiving structure. In the case of a rotor attitude sensor, the angular spacing of directly adjacent loop structures can be calculated, for example, according to equation (G2). a=360° / (2*s*m*n*p) (G2) where a corresponds to the angular spacing, s corresponds to the number of receiving structures, m corresponds to the number of receiving coils of the at least one receiving structure, n corresponds to the number of windings of the at least one receiving coil, and p corresponds to the periodicity of the at least one receiving structure.

[0022] In a further advantageous embodiment of the measurement value detection device, the spacing between the loop structures of the windings of at least one receiving coil of one and the same receiving structure should be of equal size, which means that the loop structures of the individual windings of the at least one receiving coil are approximately congruent.

[0023] In a further advantageous embodiment of the measurement value detection device, the loop structures of the windings of several receiver coils can be arranged alternately along the movement path. This means that in the case of two receiver coils, one loop structure of the first receiver coil is arranged, then one loop structure of the second receiver coil, then one loop structure of the first receiver coil, etc. Alternatively, the loop structures of the windings of several receiver coils can be arranged along the movement path in groups of receiver coils. This means that in the case of three windings per receiver coil, firstly three loop structures of the individual windings of the first receiver coil can be arranged, then three loop structures of the individual windings of the second receiver coil can be arranged, and then three loop structures of the individual windings of the first receiver coil can be arranged, etc.

[0024] Exemplary embodiments of the invention are illustrated in the drawings and explained in more detail in the following description, in which components or elements performing the same or similar functions are provided with the same reference signs. [Brief description of the drawings]

[0025] [Figure 1] 1 is a schematic plan view of a first exemplary embodiment of a measurement value detection device according to the invention for an inductive sensor arrangement, in which a circuit carrier of the measurement value detection device is illustrated transparently; [Diagram 2] 2 is a schematic perspective detailed view of the measured value detection device according to the present invention shown in FIG. 1; [Diagram 3]FIG. 2 is a schematic plan view of an embodiment of an inductive sensor arrangement according to the invention with a second embodiment of a measurement value detection device according to the invention, in which the circuit carrier of the measurement value detection device is illustrated transparently. [Figure 4] 4 is a schematic plan view of the measurement value detection device according to the present invention shown in FIG. 3. [Diagram 5] 3 is a schematic plan view of a third embodiment of a measurement value detection device according to the invention for an inductive sensor arrangement, in which the circuit carrier of the measurement value detection device is illustrated transparently; [Figure 6] 4 is a schematic plan view of a fourth embodiment of a measurement value detection device according to the invention for an inductive sensor arrangement, in which the circuit carrier of the measurement value detection device is illustrated transparently. [Figure 7] 5 is a schematic plan view of a fifth embodiment of a measurement value detection device according to the invention for an inductive sensor arrangement, in which the circuit carrier of the measurement value detection device is illustrated transparently. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] EMBODIMENTS OF THE PRESENTINVENTION As can be seen from Figures 1 to 7, the illustrated embodiments of the measurement value detection device 10, 10A, 10B, 10C, 10D, 10E according to the invention for an inductive sensor device 1 each comprise a circuit carrier 12 covering a movement path BB of a coupling device 5 with at least one electrically conductive coupling element 5.1. The coupling device 5 is coupled to a mobile object 3 whose movement is to be detected. The circuit carrier 12 comprises at least one receiving structure 14, 14A, 14B, 14C, 14D, 14E, which comprises at least one receiving coil 16 with at least two electrically connected windings W1, W2, W3 in series. Each individual winding W1, W2, W3 of at least one receiving coil 16 has two loop structures 18A, 18B with periodically repeating loop sections SA, which extend over the movement path BB of the coupling device 5 and are formed in at least two planes of the circuit carrier 12. The sections of each individual loop structure 18A, 18B arranged in different planes of the circuit carrier 12 are electrically connected to each other via through-hole contacts DK. The periodically repeating loop sections SA of the two loop structures 18A, 18B of each individual winding W1, W2, W3 have mutually opposite directions of progression. The loop structures 18A, 18B of the at least two electrically series-connected windings W1, W2, W3 of at least one receiving coil 16 are offset from each other by a predefined distance in the direction of the movement path BB. In this case, the individual loop structures 18A, 18B of at least two windings W1, W2, W3 of at least one receiving coil 16 are divided at at least one division point A, B, C, D, E, F and connected to each other via at least one connection structure 20, 20A, 20B, 20C, 20D, 20E so that an electrical series circuit of the at least two windings W1, W2, W3 is formed, and the at least one connection structure 20, 20A, 20B, 20C includes at least two connection elements 22, 22A, 22B, which are arranged in at least two parallel planes and have opposite directions of progression.

[0027] The illustrated exemplary embodiment of the measurement value detection device 10, 10A, 10B, 10C, 10D, 10E according to the invention is used in an inductive sensor arrangement 1 configured as a rotation angle sensor or rotor attitude sensor, in which a moving body performs a rotational movement to be detected about a rotation axis DA, whereby the spacing in the direction of the movement path BB of the loop structures 18A, 18B of at least two electrically series-connected windings W1, W2, W3 of at least one receiving coil 16 corresponds to an angular spacing. In the illustrated exemplary embodiment, the periodically repeating loop sections SA of the two loop structures 18A, 18B of the individual windings W1, W2, W3 are each offset from one another by half a period in the direction of the movement path BB.

[0028] 1 to 7, the two connecting elements 22, 22A, 22B arranged in at least two planes of at least one connecting structure 20, 20A, 20B, 20C at least partially overlap each other. The number N of connecting structures 20, 20A, 20B, 20C is based on the number n of windings W1, W2, W3 of at least one receiving coil 16 and is calculated according to equation (G1) above.

[0029] At least one connection structure 20, 20A, 20B, 20C can connect the loop structures 18A, 18B of different windings W1, W2, W3, or the loop structures 18A, 18B of the same winding W1, W2, W3 of at least one receiving coil 16. In this case, a change in direction can be caused by at least two connection elements 22, 22A, 22B between the two loop structures 18A, 18B.

[0030] As can be further seen from Figures 1 to 5 and 7, the periodically repeating loop sections SA in the illustrated embodiment correspond to a complete cycle of a sine wave curve or a square wave curve, respectively. As can be further seen from Figure 6, the periodically repeating loop sections SA in the illustrated embodiment correspond to a complete cycle of a square wave curve. In this case, the number of periodically repeating loop sections SA defines the periodicity of the receiving structure 14. Of course, in alternative embodiments not shown, the loop structures 18A, 18B can also have other suitable extension shapes, such as, for example, a triangular wave curve.

[0031] 1-7, the sections of the individual loop structures 18A, 18B in the illustrated embodiment that are located in different planes of the circuit support 12 correspond to half periods of the repeating loop section SA. Of course, in alternative embodiments not illustrated, the sections of the individual loop structures 18A, 18B that are located in different planes of the circuit support 12 could correspond to different sections, such as quarter periods, of the repeating loop section SA.

[0032] The angular spacing a between adjacent loop structures 18A, 18B of the at least one receiving structure 14 is based on the number s of receiving structures 14, the number m of receiving coils 16, the number n of windings W1, W2, W3 of the at least one receiving coil 16, and the periodicity p of the at least one receiving structure 14, and is calculated according to equation (G2) above. In the illustrated embodiment, the angular spacing between the loop structures 18A, 18B of the windings W1, W2, W3 of the at least one receiving coil 16 of the same receiving structure 14 is of equal magnitude.

[0033] In the following, the basic structure of the measurement value detection device 10 will be described using as an example a first embodiment of the measurement value detection device 10A shown in Figures 1 and 2, where the circuit support 12 is shown in a perspective or transparent view.

[0034] As can be further seen from Fig. 1 and Fig. 2, the receiving structure 14A of the device 10A for detecting measured values ​​comprises one receiving coil 16 with two windings W1, W2, which respectively have two loop structures 18A, 18B with five periodically repeating loop sections SA, so that the receiving structure 14A or the receiving coil 16 has a periodicity of 5 (p=5). The number n of the windings W1, W2 corresponds to the value 2. The five periodically repeating loop sections SA each correspond to one complete period of a sinusoidal curve. As can be further seen from Fig. 1 and Fig. 2, the sections of the individual loop structures 18A, 18B, which are arranged in different planes of the circuit carrier 12, each correspond to half a period of the repeating loop section SA. The sections of the periodically repeating loop sections SA, which are arranged in different layers, are electrically connected to each other via through-hole contacts DK. The two loop structures 18A, 18B, which are arranged offset by half a period or 180° in the direction of movement of the circular movement path BB with opposite directions of travel indicated by corresponding arrows, surround the planes A1, A2, respectively, between the first loop structure 18A and the second loop structure 18B of the two windings W1, W2 of the receiving coil 16, and induce magnetic fields with different orientations in these planes A1, A2. In the case of a periodicity of p=5 of the receiving coil 16, five pairs of planes A1, A2 are surrounded, respectively, between the two loop structures 18A, 18B of the two electrically serially connected windings W1, W2.

[0035] The number N of the connection structures 20, 20A, 20B, 20C is calculated according to equation (G1) and is based on the number n of the windings W1, W2 of the receiving coil 16. As can be further seen from Fig. 1 and Fig. 2, the measurement value detection device 10A in the illustrated embodiment has three connection structures 20, 20A, 20B, 20C with two connection elements 22A, 22B each. To form an electrical series circuit of the two windings W1, W2 of the receiving coil 16, the individual loop structures 18A, 18B of the two windings W1, W2 are divided at six division points A, B, C, D, E, F. In this case, at the first division point A, the first loop structure 18A of the second winding W2 is divided. At the second division point B, the second loop structure 18B of the first winding W1 is divided. At the third division point C, the second loop structure 18B of the second winding W2 is divided. At the fourth division point D, the first loop structure 18A of the first winding W1 is divided. At the fifth division point E, the first loop structure 18A of the second winding W2 is divided, and at the sixth division point F, the second loop structure 18B of the second winding W2 is divided. As can be further seen from Figures 1 and 2, the division points A, B, C, D, E, F of the individual loop structures 18A, 18B of the two windings W1, W2 are formed in the through-hole contacts DK of the corresponding loop structures 18A, 18B. This means that the contact points of the through-hole contacts DK arranged on different planes of the circuit support 12 can be used as contact points 24 for electrical contact of the connection elements 22A, 22B of the connection structures 20, 20A, 20B, 20C without forming an electrical connection between the contact points arranged on different planes of the circuit support 12.

[0036] As can be further seen from Figures 1 and 2, the first connection structure 20A is arranged between the first division point A and the second division point B, and the first connection element 22A of the first connection structure 20A connects the section of the first loop structure 18A of the second winding W2 that is arranged in the first plane of the circuit support 12 to the section of the second loop structure 18B of the first winding W1 that is arranged in the first plane of the circuit support 12, and the second connection element 22B of the first connection structure 20A connects the section of the first loop structure 18A of the second winding W2 that is arranged in the second plane of the circuit support 12 to the section of the second loop structure 18B of the first winding W1 that is arranged in the second plane of the circuit support 12. The second connection structure 20B is arranged between the third division point C and the fourth division point D, and the first connection element 22A of the second connection structure 20B connects the section of the first loop structure 18A of the first winding W1 that is arranged in the first plane of the circuit support 12 to the section of the second loop structure 18B of the second winding W2 that is arranged in the first plane of the circuit support 12, and the second connection element 22B of the second connection structure 20B connects the section of the first loop structure 18A of the first winding W1 that is arranged in the second plane of the circuit support 12 to the section of the second loop structure 18B of the second winding W2 that is arranged in the second plane of the circuit support 12. The third connection structure 20C is arranged between the fifth division point E and the sixth division point F, the first connection element 22A of the third connection structure 20C connects the section of the first loop structure 18A of the second winding W2 arranged in the first plane of the circuit support 12 to the section of the second loop structure 18B of the second winding W2 arranged in the first plane of the circuit support 12, and the second connection element 22B of the third connection structure 20C connects the section of the first loop structure 18A of the second winding W2 arranged in the second plane of the circuit support 12 to the section of the second loop structure 18B of the second winding W2 arranged in the second plane of the circuit support 12. As can be further seen from Figures 1 and 2, the connection structures 20, 20A, 20B, 20C are arranged in the area of ​​the inner radius of the face of the circuit support 12 covered by the receiving coil 16.

[0037] In the illustrated embodiment of the measurement value detection device 10, at least one evaluation and control unit 7 is configured for receiving and evaluating the induced signal in at least one receiving structure 14. As can be further seen from FIGS. 1 and 2, in the illustrated first embodiment of the measurement value detection device 10A, the evaluation and control unit 7 is inserted in a first connection element 22A of a first connection structure 20A. This means that the first connection element 22A of the first connection structure 20A is split, and the contact points 24 of the first loop structure 18B of the second winding W2, which are arranged at the first split location A, are electrically connected to a first measurement terminal of the evaluation and control unit 7. Furthermore, the contact points 24 of the second loop structure 18B of the first winding W1, which are arranged at the second split location B, are electrically connected to a second measurement terminal of the evaluation and control unit 7. The split of the first connection element 22A is indicated by the dashed line representation of the first connection element 22A.

[0038] Here, the progression of the windings W1, W2 of the receiving coil 16, which are electrically connected in series, will be described with reference to Figures 1 and 2. Starting from the second measurement terminal of the evaluation and control unit 7 and the remaining section of the first connection element 22A of the first connection structure 20A, the second loop structure 18B of the first winding W1 of the receiving coil 16 is advanced counterclockwise, and the second connection element 22B of the first connection structure 20A is advanced completely. After the second connection element 22B of the first connection structure 20A is advanced, the direction of advancement is changed, and the section of the first loop structure 18A of the second winding W2 between the first division point A and the fifth division point E and the first connection element 22A of the third connection structure 20C are advanced clockwise. After the first connection element 22A of the third connection structure 20C is advanced, the direction of advance is changed, and the section of the second loop structure 18B of the second winding W2 between the sixth division point F and the third division point C is advanced. At the third division point C, the direction of advance is changed, and the second connection element 22B of the second connection structure 20B and the subsequent first loop structure 18A of the first winding W1 are advanced completely clockwise. After the first loop structure 18A of the first winding W1 is advanced completely, the direction of advance is changed, and the first connection element 22A of the second connection structure 20B, the subsequent section of the second loop structure 18B of the second winding W2 between the third division point C and the sixth division point F, and the second connection element 22B of the third connection structure 20C are advanced counterclockwise. After the second connection element 22B of the third connection structure 20C has been advanced, the direction of advancement is changed and the section of the first loop structure 18A of the second winding W2 between the fifth division point E and the first division point A and the remaining section of the first connection element 22A of the second connection structure 20A up to the first measurement terminal of the evaluation and control unit 7 are advanced clockwise.

[0039] As can further be seen from figures 3 and 4, the illustrated embodiment of an inductive sensor device 1 according to the invention for detecting the movement of a mobile object 3 comprises at least one movable coupling device 5 coupled to the mobile object 3 and a measured value detection device 10 according to the invention. In this case, at least one excitation structure 13 is arranged on a circuit carrier 12 of the measured value detection device 10, which is shown in perspective or transparently. The at least one excitation structure 13 is coupled to at least one oscillator circuit 9, which during operation inputs a periodic alternating signal to the at least one excitation structure 13. The at least one movable coupling device 5 influences an inductive coupling between the at least one excitation structure 13 and at least one receiving structure 14 of the measured value detection device 10. At least one evaluation and control unit, not shown in detail, receives and evaluates the induced signal in the at least one receiving structure 14 and determines the current position of the mobile object 3.

[0040] In the illustrated embodiment, the moving body 3 is a shaft 3A which performs a rotational movement about a rotation axis DA along a circular movement path BB. In an alternative embodiment of the inductive sensor arrangement 1, not shown, the moving body 3 performs a linear movement which is detected and evaluated by the inductive sensor arrangement 1.

[0041] As can be further seen from Figures 3 and 4, the coupling device 5 in the illustrated embodiment is configured as a rotor 5A with five electrically conductive coupling segments 5.1 formed as vanes 5.1A and is connected to the shaft 3A in a non-rotatable manner. The excitation structure 13 has an excitation coil 13A and is arranged radially outside the receiving structure 14 and is connected to an oscillator circuit 9, which in operation inputs a periodic alternating signal to the excitation coil 13A. The coupling device 5, which is rotatable about a rotation axis DA, exerts an inductive coupling between the excitation coil 13A and the receiving structure 14. Similar to the evaluation and control unit 7 shown in Figures 1 and 2 of the first embodiment of the measurement value detection device 10A, an evaluation and control unit, not shown in Figures 3 and 4, of the second embodiment of the measurement value detection device 10B also receives and evaluates the signal induced in the receiving structure 14 and determines the current rotation angle of the mobile body 3.

[0042] As can be further seen from Figures 3 and 4, the measured value detection device 10B in the illustrated second embodiment comprises one receiving structure 14B with two receiving coils 16A, 16B, each of which has three windings 1W1, 1W2, 1W3, 2W1, 2W2, 2W3. The three windings 1W1, 1W2, 1W3, 2W1, 2W2, 2W3 of the two receiving coils 16A, 16B each have two loop structures 18A, 18B with five periodically repeating loop sections, so that the receiving structure 14B or the receiving coils 16A, 16B has a periodicity of 5 (p=5). As in the first embodiment, the periodically repeating loop sections each correspond to a complete cycle of a sinusoidal curve, and the sections of the individual loop structures 18A, 18B arranged in different planes of the circuit support 12 each correspond to half a cycle of the repeating loop sections. The periodically repeating loop segments that are arranged on different layers are electrically connected to each other via through-hole contacts DK.

[0043] The number N of the connection structures 20A1, 20B1, 20C1, 20D1, 20E1 of the first receiving coil 16A and the number N of the connection structures 20A2, 20B2, 20C2, 20D2, 20E2 of the second receiving coil 16B are calculated according to the equation (G1) as in the first embodiment. As can be further seen from Figures 3 and 4, the measurement value detection device 10B in the illustrated embodiment has five connection structures 20A1, 20B1, 20C1, 20D1, 20E1 with two connection elements 22A, 22B each for the first receiving coil 16A and five connection structures 20A2, 20B2, 20C2, 20D2, 20E2 with two connection elements 22A, 22B each for the second receiving coil 16B. The formation of an electrical series circuit of the three windings 1W1, 1W2, 1W3 of the first receiving coil 16A or the three windings 2W1, 2W2, 2W3 of the second receiving coil 16B proceeds similarly to the embodiment according to figures 1 and 2 of the first embodiment. As in the first embodiment, the connection structures 20A1, 20B1, 20C1, 20D1, 20E1 of the first receiving coil 16A and the connection structures 20A2, 20B2, 20C2, 20D2, 20E2 of the second receiving coil 16B are arranged in the area of ​​the inner radius of the surface of the circuit carrier 12 covered by the receiving coils 16A, 16B. As can be further seen from Figures 3 and 4, the loop structures 18A and 18B of the three windings 1W1, 1W2, 1W3, 2W1, 2W2, and 2W3 of the two receiving coils 16A and 16B are arranged along the moving path BB in groups for each receiving coil 16. Thus, the three first loop structures 18A of the first winding 1W1, the second winding 1W2, and the third winding 1W3 of the first receiving coil 16A are arranged side by side. Next, the three first loop structures 18A of the first winding 2W1, the second winding 2W2, and the third winding 2W3 of the second receiving coil 16B are arranged side by side. Next, the three second loop structures 18B of the first winding 2W1, the second winding 2W2, and the third winding 2W3 of the first receiving coil 16A are arranged side by side. Subsequently, three second loop structures 18B, that is, the first winding 2W1, the second winding 2W2, and the third winding 2W3 of the second receiving coil 16B, are arranged side by side.This sequence is repeated over five periods of the three windings 1W1, 1W2, 1W3, 2W1, 2W2, 2W3 of the two receiving coils 16A, 16B.

[0044] As can be further seen from Fig. 5, the measured value detection device 10C in the illustrated third embodiment, like the second embodiment, comprises one receiving structure 14C with two receiving coils 16A, 16B, each having three windings 1W1, 1W2, 1W3, 2W1, 2W2, 2W3. The three windings 1W1, 1W2, 1W3, 2W1, 2W2, 2W3 of the two receiving coils 16A, 16B each have two loop structures 18A, 18B with five periodically repeating loop sections, so that the receiving structure 14C or the receiving coils 16A, 16B have a periodicity of 5 (p = 5). As in the first and second embodiments, each of the periodically repeating loop segments corresponds to one complete period of a sinusoidal curve, and each of the segments of the individual loop structures 18A, 18B located on different planes of the circuit carrier 12 corresponds to a half period of the periodically repeating loop segments. The segments of the periodically repeating loop segments located on different layers are electrically connected to each other via through-hole contacts DK.

[0045] The number N of the connection structures 20A1, 20B1, 20C1, 20D1, 20E1 of the first receiving coil 16A and the number N of the connection structures 20A2, 20B2, 20C2, 20D2, 20E2 of the second receiving coil 16B are calculated according to the equation (G1) as in the first and second embodiments. As can be further seen from Fig. 5, the measurement value detection device 10C in the illustrated embodiment has five connection structures 20A1, 20B1, 20C1, 20D1, 20E1 with two connection elements 22A, 22B each for the first receiving coil 16A and five connection structures 20A2, 20B2, 20C2, 20D2, 20E2 with two connection elements 22A, 22B each for the second receiving coil 16B. The formation of an electrical series circuit of the three windings 1W1, 1W2, 1W3 of the first receiving coil 16A or the three windings 2W1, 2W2, 2W3 of the second receiving coil 16B proceeds similarly to the first embodiment according to the embodiment according to figures 1 and 2. As in the first and second embodiments, the connection structures 20A1, 20B1, 20C1, 20D1, 20E1 of the first receiving coil 16A and the connection structures 20A2, 20B2, 20C2, 20D2, 20E2 of the second receiving coil 16B are arranged in the area of ​​the inner radius of the surface of the circuit carrier 12 that is covered by the receiving coils 16A, 16B. As can be further seen from FIG. 5, the loop structures 18A, 18B of the three windings 1W1, 1W2, 1W3, 2W1, 2W2, 2W3 of the two receiving coils 16A, 16B are arranged alternately along the movement path BB, unlike the embodiment shown in FIGS. 3 and 4. Thus, the first loop structure 18A of the first winding 1W1 of the first receiving coil 16A is followed by the first loop structure 18A of the first winding 1W2 of the second receiving coil 16B, which is followed by the first loop structure 18A of the second winding 2W1 of the first receiving coil 16A, which is followed by the first loop structure 18A of the second winding 2W2 of the second receiving coil 16B, which is followed by the first loop structure 18A of the third winding 3W1 of the first receiving coil 16A, which is followed by the first loop structure 18A of the third winding 3W2 of the second receiving coil 16B.The second loop structure 18B of the first winding 1W1 of the first receiving coil 16A is then followed by the second loop structure 18B of the first winding 1W2 of the second receiving coil 16B, which is followed by the second loop structure 18B of the second winding 2W1 of the first receiving coil 16A, which is followed by the second loop structure 18B of the second winding 2W2 of the second receiving coil 16B, which is followed by the second loop structure 18B of the third winding 3W1 of the first receiving coil 16A, which is followed by the second loop structure 18B of the third winding 3W2 of the second receiving coil 16B, etc. This sequence is repeated over five periods of the three windings 1W1, 1W2, 1W3, 2W1, 2W2, 2W3 of the two receiving coils 16A, 16B.

[0046] As can be further seen from Fig. 6, the measurement value detection device 10D in the illustrated fourth embodiment includes one receiving structure 14D with two receiving coils 16A, 16B, similar to the second and third embodiments. Unlike the second and third embodiments, the two receiving coils 16A, 16B each have five windings 1W1, 1W2, 1W3, 1W4, 1W5, 2W1, 2W2, 2W3, 2W4, 2W5. The five windings 1W1, 1W2, 1W3, 1W4, 1W5, 2W1, 2W2, 2W3, 2W4, 2W5 of the two receiving coils 16A, 16B each have two loop structures 18A, 18B with five periodically repeating loop sections, so that the receiving structure 14D or the receiving coils 16A, 16B have a periodicity of 5 (p = 5). Unlike the previous embodiment, each of the periodically repeating loop segments corresponds to one complete period of a square wave curve, and the segments of the individual loop structures 18A, 18B located on different planes of the circuit carrier 12 correspond to half a period of the periodically repeating loop segments. The segments of the periodically repeating loop segments located on different layers are electrically connected to each other via through-hole contacts DK.

[0047] The number N of connection structures 20A1, 20B1, 20C1, 20D1, 20E1, 20F1, 20G1, 20H1, 20L1 of the first receiving coil 16A and the number N of connection structures 20A2, 20B2, 20C2, 20D2, 20E2, 20F2, 20G2, 20H2, 20L2 of the second receiving coil 16B are calculated according to equation (G1), as in the previous embodiment. As can further be seen from FIG. 6, the measurement value detection device 10D in the illustrated embodiment has nine connection structures 20A1, 20B1, 20C1, 20D1, 20E1, 20F1, 20G1, 20H1, 20L1 with two connection elements 22A, 22B each for the first receiving coil 16A and nine connection structures 20A2, 20B2, 20C2, 20D2, 20E2, 20F2, 20G2, 20H2, 20L2 with two connection elements 22A, 22B each for the second receiving coil 16B. The formation of an electrical series circuit of the five windings 1W1, 1W2, 1W3, 1W4, 1W5 of the first receiving coil 16A or the five windings 2W1, 2W2, 2W3, 2W4, 2W5 of the second receiving coil 16B proceeds similarly to the embodiment according to figures 1 and 2 of the first embodiment. As in the preceding embodiment, the connection structures 20A1, 20B1, 20C1, 20D1, 20E1, 20F1, 20G1, 20H1, 20L1 of the first receiving coil 16A and the connection structures 20A2, 20B2, 20C2, 20D2, 20E2, 20F2, 20G2, 20H2, 20L2 of the second receiving coil 16B are arranged in the region of the inner radius of the surface of the circuit carrier 12 that is covered by the receiving coils 16A, 16B. As can be further seen from FIG. 6, the loop structures 18A, 18B of the five windings 1W1, 1W2, 1W3, 1W4, 1W5, 2W1, 2W2, 2W3, 2W4, 2W5 of the two receiving coils 16A, 16B are arranged alternately along the movement path BB, similar to the embodiment shown in FIG. 5.Thus, the first loop structure 18A of the first winding 1W1 of the first receiving coil 16A is followed by the first loop structure 18A of the first winding 1W2 of the second receiving coil 16B, which is followed by the first loop structure 18A of the second winding 2W1 of the first receiving coil 16A, which is followed by the first loop structure 18A of the second winding 2W2 of the second receiving coil 16B, which is followed by the first loop structure 18A of the third winding 3 ... , followed by a first loop structure 18A of the third winding 3W2 of the second receiving coil 16B, which is followed by a first loop structure 18A of the fourth winding 4W1 of the first receiving coil 16A, which is followed by a first loop structure 18A of the fourth winding 4W2 of the second receiving coil 16B, which is followed by a first loop structure 18A of the fifth winding 5W1 of the first receiving coil 16A, which is followed by a first loop structure 18A of the fifth winding 5W2 of the second receiving coil 16B. The second loop structure 18B of the first winding 1W1 of the first receiving coil 16A is then followed by the second loop structure 18B of the first winding 1W2 of the second receiving coil 16B, which is then followed by the second loop structure 18B of the second winding 2W1 of the first receiving coil 16A, which is then followed by the second loop structure 18B of the second winding 2W2 of the second receiving coil 16B, which is then followed by the second loop structure 18B of the third winding 3W1 of the first receiving coil 16A, which is then followed by the second loop structure 18B of the third winding 3W1 of the first receiving coil 16A, which is then followed by the second loop structure 18B of the second winding 2W2 of the second receiving coil 16B ... third winding 3W1 of the first receiving coil 16A, which is then followed by the second loop structure 18B of the second winding 2W2 of the second receiving coil 16B, which is then followed by the The second loop structure 18B of the third winding 3W2 of the second receiving coil 16B is followed by the second loop structure 18B of the fourth winding 4W1 of the first receiving coil 16A, which is followed by the second loop structure 18B of the fourth winding 4W2 of the second receiving coil 16B, which is followed by the second loop structure 18B of the fifth winding 5W1 of the first receiving coil 16A, which is followed by the second loop structure 18B of the fifth winding 5W2 of the second receiving coil 16B. This sequence is repeated over five periods of the five windings 1W1, 1W2, 1W3, 1W4, 1W5, 2W1, 2W2, 2W3, 2W4, 2W5 of the two receiving coils 16A, 16B.

[0048] As can be seen further from Fig. 7, the device 10E for detecting measured values ​​in the fifth embodiment shown comprises, as in the first embodiment, a receiving structure 14E with a receiving coil 16. The receiving coil 16 comprises three windings W1, W2, W3, which in turn have two loop structures 18A, 18B with four periodically repeating loop sections, so that the receiving structure 14E or the receiving coil 16 has a periodicity of four (p = 4). As in the first embodiment, the periodically repeating loop sections each correspond to a complete period of a sinusoidal curve, and the sections of the individual loop structures 18A, 18B arranged in different planes of the circuit carrier 12 each correspond to half a period of the repeating loop section. The periodically repeating loop sections arranged in different layers are electrically connected to each other via through-hole contacts DK.

[0049] The number N of the connection structures 20A, 20B, 20C, 20D, 20E of the receiving coil 16 is calculated according to equation (G1) as in the previous embodiment. As can be further seen from Fig. 7, the measurement value detection device 10E in the illustrated embodiment has five connection structures 20A, 20B, 20C, 20D, 20E with two connection elements 22A, 22B each for the receiving coil 16. The formation of the electrical series circuit of the three windings W1, W2, W3 proceeds similarly to the embodiment according to Figs. 1 and 2 of the first embodiment. In contrast to the previous embodiment, the connection structures 20A, 20B, 20C, 20D, 20E of the receiving coil 16 are arranged in the region of the inner radius and in the region of the outer radius of the surface of the circuit carrier 12 that is covered by the receiving coil 16. As can be further seen from FIG. 7, the three connection structures 20A, 20B, 20C are arranged in the region of the inner radius, and the two connection structures 20D, 20E are arranged in the region of the outer radius.

Claims

1. A measurement value detection device (10) for an induction type sensor device (1), The measurement value detection device (10) includes a circuit support (12), The circuit support (12) covers the travel path (BB) of the coupling device (5) which has at least one conductive coupling element (5.1), The coupling device (5) is coupled to the moving body (3) whose movement is detected. The circuit support (12) includes at least one receiving structure (14), The receiving structure (14) includes at least one receiving coil (16) having at least two electrically connected series windings (W1, W2, W3), Each individual winding (W1, W2, W3) of the at least one receiving coil (16) has two loop structures (18A, 18B) each having a periodically repeating loop section (SA), extending across the travel path (BB) of the coupling device (5), and formed on at least two planes of the circuit support (12), The individual loop structures (18A, 18B) that are arranged in different planes of the circuit support (12) are electrically connected to each other via through-hole contacts (DK). The periodically repeating loop sections (SA) of the two loop structures (18A, 18B) of the individual windings (W1, W2, W3) have opposite directions of progression. The loop structures (18A, 18B) of the at least two electrically series-connected windings (W1, W2, W3) of the at least one receiving coil (16) are arranged offset from each other by a predetermined distance in the direction of the movement path (BB). The individual loop structures (18A, 18B) of the at least two electrically series-connected windings (W1, W2, W3) of the at least one receiving coil (16) are divided at at least one division point (A, B, C, D, E, F) and are connected to each other via at least one connecting structure (20) such that an electrical series circuit of the at least two electrically series-connected windings (W1, W2, W3) is formed. The at least one connecting structure (20) includes at least two connecting elements (22), the at least two connecting elements (22) are arranged in at least two parallel planes and have opposite directions of travel. Measurement value detection device (10).

2. The at least two connecting elements (22) of the at least one connecting structure (20), which are arranged in at least two planes, overlap at least partially. The measurement value detection device (10) according to claim 1.

3. Each of the periodically repeating loop segments (SA) corresponds to a complete period of a sinusoidal curve, a square wave curve, or a triangular wave curve. The number of the periodically repeating loop segments (SA) defines the periodicity of the receiving structure (14). The measurement value detection device (10) according to claim 1.

4. Of the individual loop structures (18A, 18B), the sections arranged in different planes of the circuit support (12) correspond to half a period or a quarter of a period of the periodically repeating loop section (SA). The measurement value detection device (10) according to claim 1.

5. The at least one division point (A, B, C, D, E, F) of the individual loop structures (18A, 18B) of the at least two electrically connected series windings (W1, W2, W3) is formed in the through-hole contact (DK) of the corresponding loop structure (18A, 18B). The measurement value detection device (10) according to claim 1.

6. At least one evaluation / control unit (7) is configured to receive and evaluate the signal induced in the at least one receiving structure (14). The measurement value detection device (10) according to claim 1.

7. The at least one evaluation and control unit (7) is inserted into the connection element (22) of the at least one connection structure (20). The measurement value detection device (10) according to claim 6.

8. The at least one connecting structure (20) makes it possible to connect loop structures (18A, 18B) of different windings (W1, W2, W3) of the at least one receiving coil (16) to each other, or loop structures (18A, 18B) of the same winding (W1, W2, W3) to each other. The measurement value detection device (10) according to claim 1.

9. The at least two connecting elements (22) between the two loop structures (18A, 18B) make it possible to cause a change in the direction of travel. The measurement value detection device (10) according to claim 8.

10. The number of the connection structures (20) is based on the number of windings (W1, W2, W3) of the at least one receiving coil (16). The measurement value detection device (10) according to claim 1.

11. The spacing between adjacent loop structures (18A, 18B) of the at least one receiving structure (14) is based on the number of receiving structures (14), the number of receiving coils (16), the number of windings (W1, W2, W3) of the at least one receiving coil (16), and the periodicity of the at least one receiving structure (14). The measurement value detection device (10) according to claim 1.

12. The spacing between the loop structures (18A, 18B) of the windings (W1, W2, W3) of at least one receiving coil (16) of the same receiving structure (14) is of the same size. The measurement value detection device (10) according to claim 1.

13. The loop structures (18A, 18B) of the windings (W1, W2, W3) of the multiple receiving coils (16) are arranged alternately along the movement path (BB), or the receiving coils (16) are grouped together and arranged along the movement path (BB). The measurement value detection device (10) according to claim 1.

14. An inductive sensor device (1) for detecting the movement of a moving object (3), The induction-type sensor device (1) comprises at least one movable coupling device (5) coupled to the moving body (3), and a measurement value detection device (10) according to any one of claims 1 to 13. At least one excitation structure (13) is placed on the circuit support (12) of the measurement value detection device (10). The at least one excitation structure (13) is coupled to at least one oscillator circuit (9), During operation, the at least one oscillator circuit (9) inputs a periodic alternating signal to the at least one excitation structure (13). The at least one movable coupling device (5) is configured to affect the inductive coupling between the at least one excitation structure (13) and the at least one receiving structure (14) of the measurement detection device (10), At least one evaluation and control unit (7) is configured to receive and evaluate the signal induced in at least one receiving structure (14) and to determine the current position of the moving body (3). Induction type sensor device (1).

15. The moving body (3) performs rotational motion or linear motion about the axis of rotation (DA). The induction type sensor device (1) according to claim 14.

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