Wiegand sensor
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- FRABA
- Filing Date
- 2024-08-30
- Publication Date
- 2026-07-08
Smart Images
Figure EP2024074336_06032025_PF_FP_ABST
Abstract
Description
[0001] DESCRIPTION
[0002] Wiegand sensor
[0003] The present invention relates to a Wiegand sensor comprising: a Wiegand wire, a sensor coil surrounding the Wiegand wire with a first sensor coil end and a second sensor coil end, a first field conducting element arranged at a first end of the Wiegand wire, and a second field conducting element arranged at a second end of the Wiegand wire opposite the first end.
[0004] Such a Wiegand sensor is known from DE 10 2020 100 732 A1, wherein the Wiegand sensor comprises a sensor housing in which the Wiegand wire, the sensor coil and the two field conducting elements are accommodated.
[0005] WO 2022 / 230651 A1 further discloses a Wiegand sensor of the type mentioned above, wherein the two field-conducting elements each have a sensing section directed toward a center plane extending transversely to the Wiegand wire through the center of the Wiegand wire. The sensing sections enable the effective introduction of an excitation magnetic field, which interacts with the Wiegand sensor, into the Wiegand wire, thus enabling the realization of a reliable Wiegand sensor.
[0006] The present invention is based on the object of creating a versatile, reliable Wiegand sensor. This object is achieved according to the invention by a Wiegand sensor having the features of main claim 1.
[0007] The Wiegand sensor according to the invention comprises a sensor housing, which is preferably designed as a plastic injection-molded part.
[0008] The Wiegand sensor according to the invention further comprises a Wiegand wire and a sensor coil radially surrounding the Wiegand wire, having a first sensor coil end and a second sensor coil end, wherein the Wiegand wire and the sensor coil are fastened in the sensor housing, i.e., arranged at least partially in the sensor housing and firmly connected to the sensor housing. Such Wiegand sensors are also referred to as pulse wire sensors and are generally known. Wiegand wires generally have a hard magnetic sheath and a soft magnetic core, or vice versa. Under the influence of an external magnetic field, a magnetization direction of the Wiegand wire is suddenly inverted, whereby a short Wiegand voltage pulse is generated in the sensor coil radially surrounding the Wiegand wire, which can be tapped via the two sensor coil ends of the sensor coil.This effect is called the Wiegand effect or also the macroscopic or large Barkhausen effect and is well known.
[0009] The Wiegand sensor according to the invention further comprises two one-piece field conducting elements, which are also mounted in the sensor housing. A first field conducting element is arranged at a first end of the Wiegand wire, and a second field conducting element is arranged at a second end of the Wiegand wire opposite the first end. The field conducting elements consist of a soft magnetic material, preferably a ferrite, and are used to guide an external excitation magnetic field to the two ends of the Wiegand wire in a targeted manner, thereby generating the excitation magnetic field in the Wiegand wire as axially as possible.
[0010] In the Wiegand sensor according to the invention, the first field conducting element and the second field conducting element each have a detection section which, starting from a base body section that preferably extends transversely to the Wiegand wire and radially encloses the Wiegand wire, is directed in the direction of a center plane running transversely to the Wiegand wire through the center of the Wiegand wire. Consequently, the detection sections of the two field conducting elements are at a smaller distance from the center plane at their ends facing away from the respective base body section than the base body section of the respective field conducting element. Preferably, the two field conducting elements have an end surface running parallel to the center plane, i.e., transversely to the Wiegand wire, at the ends facing away from the respective base body section.
[0011] According to the invention, the detection sections of the two field conducting elements each protrude from the sensor housing on a detection side and have, outside the sensor housing, a detection-side contacting surface running parallel to the Wiegand wire, wherein the detection-side contacting surfaces of the two field conducting elements are arranged parallel to one another.
[0012] According to the invention, an electrically conductive contacting means is arranged on each of the detection-side contacting surfaces of the two field-conducting elements, wherein the contacting means arranged on the detection-side contacting surface of the first field-conducting element is electrically connected to the first sensor coil end, and the contacting means arranged on the detection-side contacting surface of the second field-conducting element is electrically connected to the second sensor coil end. The Wiegand sensor according to the invention can therefore be electrically conductively attached to correspondingly designed coil contacting surfaces of a printed circuit board, provided for electrically contacting the sensor coil, via the contacting means arranged on the detection-side contacting surfaces of the two field-conducting elements, for example by means of a soldered connection or another type of integral, electrically conductive connection.
[0013] According to the invention, the two field conducting elements, i.e. the first field conducting element and the second field conducting element, further each have a contacting section which protrudes from the sensor housing on a contacting side deviating from the detection side and which has a contacting-side contacting surface outside the sensor housing running parallel to the Wiegand wire, wherein the contacting-side contacting surfaces of the two field conducting elements are arranged parallel to one another but not parallel to the detection-side contacting surfaces of the two field conducting elements.
[0014] According to the invention, an electrically conductive contacting means is arranged on each of the contact-side contacting surfaces of the two field conducting elements, wherein the contacting means arranged on the contact-side contacting surface of the first field conducting element is electrically connected to the first sensor coil end, and the contacting means arranged on the contact-side contacting surface of the second field conducting element is electrically connected to the second sensor coil end. The Wiegand sensor according to the invention can therefore be electrically conductively attached to correspondingly designed coil contacting surfaces of a printed circuit board, provided for electrically contacting the sensor coil, via the contacting means arranged on the contact-side contacting surfaces of the two field conducting elements.
[0015] The Wiegand sensor according to the invention is therefore designed to be electrically conductively attached to correspondingly formed coil contact surfaces of a printed circuit board in two different orientations. In particular, the Wiegand sensor according to the invention is designed to be electrically conductively attached to the coil contact surfaces of a printed circuit board in a first orientation via the coils arranged on the contact surfaces on the detection side.
[0016] Contacting means to be fastened to the circuit board so that the detection sections protruding from the sensor housing on the detection side face the circuit board, and configured to be fastened to the circuit board in a second orientation via the contacting means arranged on the contacting-side contact surfaces so that the detection sections protruding from the sensor housing on the detection side do not face the circuit board.
[0017] The Wiegand sensor according to the invention can therefore be used in conjunction with different excitation magnet arrangements without requiring structural modifications to the Wiegand sensor. For example, in the first orientation, the Wiegand sensor according to the invention can effectively introduce an excitation magnetic field, generated by an excitation magnet arrangement arranged on a rear side of the circuit board facing away from the Wiegand sensor, into the Wiegand wire via the sensing sections. In the second orientation, the Wiegand sensor can effectively introduce an excitation magnetic field, generated by an excitation magnet arrangement arranged adjacent to the Wiegand sensor on the same side of the circuit board as the Wiegand sensor, into the Wiegand wire via the sensing sections. This creates a versatile, reliable Wiegand sensor.
[0018] In a preferred embodiment, the contact-side contact surfaces of the two field-conducting elements are arranged perpendicular to the detection-side contact surfaces of the two field-conducting elements. This enables particularly reliable detection of an excitation magnet arrangement arranged laterally adjacent to the Wiegand sensor when the Wiegand sensor is mounted in the second orientation, i.e., when the Wiegand sensor is mounted via the contacting means arranged on the contact-side contact surfaces. In this preferred embodiment, the Wiegand sensor according to the invention can therefore be arranged both axially adjacent to an excitation magnet arrangement in the first orientation and radially adjacent to an excitation magnet arrangement in the second orientation, thereby effectively introducing the excitation magnetic field generated by the excitation magnet arrangement into the Wiegand wire via the detection sections.
[0019] Preferably, the detection sections of the two field conducting elements are each arranged at an angle between 65° and 85°, particularly preferably at an angle between 70° and 80°, to the center plane in order to enable a particularly effective introduction of an excitation magnetic field, which interacts with the Wiegand sensor, into the Wiegand wire and thus to create a particularly reliable Wiegand sensor.
[0020] Preferably, a winding region of the sensor coil in the region of the center plane has an outer diameter that is larger than an outer diameter in the region of an axial end of the winding region of the sensor coil in order to generate particularly pronounced Wiegand voltage pulses in the sensor coil and thus to create a particularly reliable Wiegand sensor.
[0021] Advantageously, the distance between the detection sections of the two field conducting elements is a maximum of 50%, preferably a maximum of 25%, of the distance between the base body sections of the two field conducting elements that enclose the Wiegand wire. This enables the realization of a particularly reliable Wiegand sensor.
[0022] In a preferred embodiment, the two field conducting elements each have an electrically conductive coating that forms all electrically conductive contacting means arranged on the respective field conducting element, i.e., both the contacting means arranged on the detection-side contacting surface of the respective field conducting element and the contacting means arranged on the contact-side contacting surface of the respective field conducting element. This allows contacting means to be implemented in a relatively simple manner that have relatively good electrical conductivity and can be connected relatively well in an electrically conductive manner to corresponding contacting surfaces of a printed circuit board. This creates a simple and reliable Wiegand sensor arrangement.
[0023] Preferably, the first sensor coil end is electrically conductively attached to the electrically conductive coating of the first field-conducting element, for example, by means of a soldered connection or another type of integral, electrically conductive connection, and the second sensor coil end is electrically conductively attached to the electrically conductive coating of the second field-conducting element. This creates a Wiegand sensor arrangement that is easy to manufacture and cost-effective.
[0024] In an alternative preferred embodiment, the Wiegand sensor according to the invention comprises an electrically conductive first sheet metal body, in which the first field conducting element is arranged and which forms the electrically conductive contacting means arranged on the first field conducting element, and an electrically conductive second sheet metal body, in which the second field conducting element is arranged and which forms the electrically conductive contacting means arranged on the second field conducting element. Preferably, the two field conducting elements are pressed into the respective sheet metal body, glued in, or firmly connected to the respective sheet metal body in some other way. This makes it possible to realize contacting means in a relatively simple manner which have relatively good electrical conductivity and can be connected in a relatively good electrically conductive manner to corresponding contact surfaces of a printed circuit board.This creates an easy-to-manufacture and reliable Wiegand sensor arrangement.
[0025] Preferably, the first sensor coil end is electrically conductively attached to the first sheet metal body, for example, by means of a soldered connection or another type of integral, electrically conductive connection, and the second sensor coil end is electrically conductively attached to the second sheet metal body. This creates a Wiegand sensor arrangement that is easy to manufacture and cost-effective.
[0026] Preferably, the two field-conducting elements are each overmolded by the sensor housing and thus reliably attached to the sensor housing without the need for special fastening means or assembly steps. This creates a simple and cost-effective Wiegand sensor arrangement. An embodiment of the present invention is described below with reference to the accompanying figures. Herein:
[0027] Fig. 1 schematically shows a plan view of a contact side of a Wiegand sensor according to the invention,
[0028] Fig. 2 shows a schematic plan view of a front side of the Wiegand sensor from Fig. 1,
[0029] Fig. 3 shows a schematic sectional view of the Wiegand sensor from Fig. 1 and Fig. 2, wherein the Wiegand sensor is cut along the line III-III shown in Fig. 2,
[0030] Fig. 4 is a representation of an alternative Wiegand sensor according to the invention corresponding to the representation in Fig. 3,
[0031] Fig. 5 shows an arrangement of the Wiegand sensor from Fig. 1 to Fig. 3 or the Wiegand sensor from Fig. 4, wherein the Wiegand sensor is fastened to a circuit board in a first orientation and interacts with an excitation magnet arranged on a side of the circuit board opposite the Wiegand sensor, and
[0032] Fig. 6 shows an alternative arrangement of the Wiegand sensor from Figs. 1 to 3 or the Wiegand sensor from Fig. 4, wherein the Wiegand sensor is attached to a circuit board in a second orientation and interacts with an excitation magnet arranged adjacent to the Wiegand sensor on the same side of the circuit board. Figs. 1 to 3 show a Wiegand sensor 100-1 according to the invention, which comprises a sensor housing 1 formed as an injection-molded part.
[0033] The Wiegand sensor 100-1 further comprises a Wiegand wire 2, a sensor coil 3, a first field conducting element 4 and a second field conducting element 5, each of which is mounted in the sensor housing 1.
[0034] The sensor coil 3 comprises a winding region 3.1, which radially surrounds the Wiegand wire 2, as well as a first sensor coil end 3.2 and a second sensor coil end 3.3.
[0035] The first field conducting element 4 and the second field conducting element 5 each consist of a soft magnetic material, in particular of a soft magnetic ferrite, and are each overmolded by the sensor housing 1.
[0036] The first field conducting element 4 and the second field conducting element 5 are each completely coated on their outer side with an electrically conductive coating 4.1, 5.1.
[0037] The first field conducting element 4 and the second field conducting element 5 each have a base body section 4.2, 5.2 which extends transversely to the Wiegand wire 2 and radially surrounds the Wiegand wire 2, wherein the base body section 4.2 of the first field conducting element 4 surrounds a first end 2.1 of the Wiegand wire 2 and the base body section 5.2 of the second field conducting element 5 surrounds a second end 2.2 of the Wiegand wire 2.
[0038] The first field conducting element 4 and the second field conducting element 5 further each have a detection section 4.3, 5.3 which extends from the base body section 4.2, 5.2 in the direction of a center plane M running transversely to the Wiegand wire 2 through its center point, which is arranged at an angle of 73° to the center plane M and protrudes from the sensor housing 1 on a detection side E.
[0039] The detection section 4.3 of the first field conducting element 4 and the detection section 5.3 of the second field conducting element 5 each have, at their end facing away from the base body section 4.2, 5.2, an end surface 4.3.1, 5.3.1 extending transversely to the Wiegand wire, wherein a distance A1 between the end surface 4.3.1 of the first field conducting element 4 and the end surface 5.3.1 of the second field conducting element 5 is less than 25% of a distance A2 between the base body section
[0040] 4.2 of the first field conducting element 4 and the base body section 5.2 of the second field conducting element 5.
[0041] On the electrically conductive coating 4.1 of the detection section
[0042] 4.3 of the first field conducting element 4, the first sensor coil end 3.2 is electrically conductively attached in the region of a first recess 1.1 of the sensor housing 1, and the second sensor coil end 3.3 is electrically conductively attached to the electrically conductive coating 5.1 of the detection section 5.3 of the second field conducting element 5 in the region of a second recess 1.2 of the sensor housing 1.
[0043] The detection section 4.3 of the first field conducting element 4 and the detection section 5.3 of the second field conducting element 5 further each have, at their end facing away from the base body section 4.2, 5.2 outside the sensor housing 1, a detection-side contacting surface 4.3.2, 5.3.2 running parallel to the Wiegand wire, wherein the detection-side contacting surface 4.3.2 of the first field conducting element 4 is arranged parallel to the detection-side contacting surface 5.3.2 of the second field conducting element 5. On the detection-side contacting surface 4.3.2 of the first field conducting element 4 and on the detection-side contacting surface 5.3.2 of the second field conducting element 5, an electrically conductive contacting means 4.4, 5.4 is formed by the electrically conductive coating 4.1, 5.1 of the respective field conducting element 4, 5, wherein the contacting means 4.4, 5.4 formed by the electrically conductive coating 4.1, 5.11 of the first field conducting element 4 and arranged on the detection-side contacting surface 4.3.2 of the first field conducting element 4 is electrically connected to the first sensor coil end 3.2, and wherein the contacting means 5.4 formed by the electrically conductive coating 5.1 of the second field conducting element 5 and arranged on the detection-side contacting surface 5.3.2 of the second field conducting element 5 is electrically connected to the second sensor coil end 3.3.
[0044] The first field conducting element 4 and the second field conducting element 5 further each have a contacting section 4.5, 5.5 adjoining the base body section 4.2, 5.2, extending transversely to the Wiegand wire 2, which protrudes from the sensor housing 1 on a contacting side K.
[0045] The contacting section 4.5 of the first field conducting element 4 and the contacting section 5.5 of the second field conducting element 5 each have, at their end facing away from the base body section 4.2, 5.2 outside the sensor housing 1, a contact-side contacting surface 4.5.1, 5.5.1 running parallel to the Wiegand wire, wherein the contact-side contacting surface 4.5.1 of the first field conducting element 4 is arranged parallel to the contact-side contacting surface 5.5.1 of the second field conducting element 5, and wherein the contact-side contacting surfaces 4.5.1, 5.5.1 of the two field conducting elements 4, 5 are each arranged perpendicular to the detection-side contacting surfaces 4.3.2, 5.3.2 of the two field conducting elements 4, 5.
[0046] On the contact-side contacting surface 4.5.1 of the first field conducting element 4 and on the contact-side contacting surface 5.5.1 of the second field conducting element 5, an electrically conductive contacting means 4.6, 5.6 is formed by the electrically conductive coating 4.1, 5.1 of the respective field conducting element 4, 5, wherein the contacting means 4.6 formed by the electrically conductive coating 4.1 of the first field conducting element 4 and arranged on the contact-side contacting surface 4.5.1 of the first field conducting element 4 is electrically connected to the first sensor coil end 3.2, and wherein the contacting means 5.6 formed by the electrically conductive coating 5.1 of the second field conducting element 5 and arranged on the contact-side contacting surface 5.5.1 of the second field conducting element 5 is electrically connected to the second sensor coil end 3.3.
[0047] Fig. 4 shows an alternative Wiegand sensor 100-2 according to the invention, wherein the corresponding reference numerals from Fig. 1 to Fig. 3 are used to describe the Wiegand sensor 100-2 for features that are identical or similar to the previously described Wiegand sensor 100-1.
[0048] The Wiegand sensor 100-2 differs from the Wiegand sensor 100-1 in that the first field conducting element 4 and the second field conducting element 5 are not coated, but rather an electrically conductive first sheet metal body 6 is provided, in which the first field conducting element 4 is arranged, and an electrically conductive second sheet metal body 7 is provided, in which the second field conducting element 5 is arranged. In the Wiegand sensor 100-2, the first sheet metal body 6 thus forms the electrically conductive contacting means arranged on the detection-side contacting surface 4.3.2 of the first field conducting element 4.
[0049] 4.4 and the electrically conductive contacting means 4.6 arranged on the contacting-side contacting surface 4.5.1 of the first field conducting element 4 and the second sheet metal body 7 arranged on the detection-side contacting surface 5.3.2 of the second
[0050] Electrically conductive contacting means arranged in the field conducting element 5
[0051] 5.4 and the electrically conductive contacting means 5.6 arranged on the contacting-side contacting surface 5.5.1 of the second field conducting element 5.
[0052] In the Wiegand sensor 100-2, the first sensor coil end 3.2 is further electrically conductively attached to the first sheet metal body 6 and the second sensor coil end 3.3 is electrically conductively attached to the second sheet metal body 7.
[0053] The Wiegand sensor 100-2 further differs from the Wiegand sensor 100-1 in that the winding area 3.1 in the area of the center plane M has an outer diameter D1 that is larger than an outer diameter D2 in the area of axial ends of the winding area 3.1.
[0054] Fig. 5 shows an arrangement of the Wiegand sensor 100-1 or the Wiegand sensor 100-2 on a circuit board 101-1, wherein the Wiegand sensor 100-1 / 100-2 interacts with an excitation magnet 103-1 arranged on a side of the circuit board 101-1 facing away from the Wiegand sensor 100-1 / 100-2 on a shaft 102-1 to be monitored. Here, the Wiegand sensor 100-1 / 100-2 is fastened to the circuit board 101-1 in a first orientation, in which the Wiegand sensor 100-1 / 100-2 is electrically conductively fastened to correspondingly designed coil contact surfaces (not shown here) of the circuit board 101-1, which are provided for electrical contacting of the sensor coil 3, via the contacting means 4.4, 5.4 arranged on the detection-side contact surfaces 4.3.2, 5.3.2, so that the detection side E of the Wiegand sensor 100-1 / 100-2, on which the detection sections 4.3, 5.3 of the two field conducting elements 4, 5 are arranged, faces the excitation magnet 103-1.
[0055] Fig. 6 shows an alternative arrangement of the Wiegand sensor 100-1 or the Wiegand sensor 100-2 on a circuit board 101-2, wherein the Wiegand sensor 100-1 / 100-2 interacts with an excitation magnet 103-2 arranged adjacent to the Wiegand sensor 100-1 / 100-2 on the same side of the circuit board 101-2 on a shaft 102-2 to be monitored.
[0056] Here, the Wiegand sensor 100-1 / 100-2 is attached to the circuit board 101-2 in a second orientation, in which the Wiegand sensor 100-1 / 100-2 is electrically conductively attached to correspondingly designed coil contact surfaces (not shown here) of the circuit board 101-2, which are provided for electrical contacting of the sensor coil 3, via the contacting means 4.6, 5.6 arranged on the contact-side contact surfaces 4.5.1, 5.5.1, so that here too, the detection side E of the Wiegand sensor 100-1 / 100-2, on which the detection sections 4.3, 5.3 of the two field conducting elements 4, 5 are arranged, faces the excitation magnet 103-2. List of reference symbols
[0057] 100-1; 100-2 Wiegand sensor
[0058] 1 sensor housing
[0059] 1.1 first recess
[0060] 1.2 second recess
[0061] 2 Wiegand wires
[0062] 2.1 first end
[0063] 2.2 second end
[0064] 3 Sensor coil
[0065] 3.1 Winding area
[0066] 3.2 first sensor coil end
[0067] 3.3 second sensor coil end
[0068] 4 first field conducting element
[0069] 4.1 electrically conductive coating
[0070] 4.2 Basic body section
[0071] 4.3 Recording section
[0072] 4.3.1 End face
[0073] 4.3.2 Detection-side contact surface
[0074] 4.4 electrically conductive contacting agent
[0075] 4.5 Contacting section
[0076] 4.5.1 Contacting-side contact surface
[0077] 4.6 electrically conductive contacting agent
[0078] 5 second field conducting element
[0079] 5.1 electrically conductive coating
[0080] 5.2 Basic body section
[0081] 5.3 Recording section
[0082] 5.3.1 End face
[0083] 5.3.2 Detection-side contact surface
[0084] 5.4 electrically conductive contacting agent
[0085] 5.5 Contacting section 5.5.1 Contacting-side contact surface
[0086] 5.6 electrically conductive contacting agent
[0087] 6 first sheet metal body
[0088] 7 second sheet metal body 101-1; 101-2 printed circuit board
[0089] 102-1; 102-2 wave
[0090] 103-1; 103-2 Excitation magnet
[0091] Al distance A2 distance
[0092] Dl outer diameter
[0093] D2 outer diameter
[0094] E Recording page
[0095] K Contact side M Center plane
Claims
AMENDED CLAIMS received by the International Bureau on 09 January 2025 (09.01.2025) PATENT CLAIMS 1. Wiegand sensor (100-1; 100-2) comprising: a sensor housing (1), a Wiegand wire (2), a sensor coil (3) surrounding the Wiegand wire (2) with a first sensor coil end (3.2) and with a second sensor coil end (3.3), a first field conducting element (4) arranged at a first end (2.1) of the Wiegand wire (2), and a second field conducting element (5) arranged at a second end (2.2) of the Wiegand wire (2) opposite the first end (2.1), wherein the two field conducting elements (4, 5) each have a detection section (4.3, 5.3) directed in the direction of a center plane (M) extending transversely to the Wiegand wire (2) through the center of the Wiegand wire (2), which protrudes from the sensor housing (1) on a detection side (E), and which is outside the Sensor housing (1) has a detection-side contact surface (4.3.2, 5.3) running parallel to the Wiegand wire (2).2), wherein the two field conducting elements (4, 5) each have a contacting section (4.5, 5.5) which protrudes from the sensor housing (1) on a contacting side (K) and which has a contacting-side contacting surface (4.5.1, 5.5.1) running parallel to the Wiegand wire (2) outside the sensor housing (1), wherein an electrically conductive element is provided on the detection-side contacting surface (4.3.2) and on the contacting-side contacting surface (4.5.1) of the first field conducting element (4). AMENDED SHEET (ARTICLE 19) Contacting means (4.4, 4.6) is arranged, which is electrically connected to the first sensor coil end (3.2), and wherein an electrically conductive contacting means (5.4, 5.6) is arranged on the detection-side contacting surface (5.3.2) and on the contacting-side contacting surface (5.5.1) of the second field conducting element (5), which is electrically connected to the second sensor coil end (3.3).
2. Wiegand sensor (100-1; 100-2) according to claim 1, wherein the contact-side contacting surfaces (4.5.1, 5.5.1) of the two field conducting elements (4, 5) are arranged perpendicular to the detection-side contacting surfaces (4.3.2, 5.3.2) of the two field conducting elements (4, 5).
3. Wiegand sensor (100-1; 100-2) according to one of the preceding claims, wherein the detection sections (4.3, 5.3) of the two field conducting elements (4, 5) are each arranged at an angle between 65° and 85°, preferably between 70° and 80°, to the center plane (M).
4. Wiegand sensor (100-1; 100-2) according to claim 3, wherein a winding region (3.1) of the sensor coil (3) in the region of the center plane (M) has an outer diameter (D1) which is larger than an outer diameter (D2) in the region of an axial end of the winding region (3.1).
5. Wiegand sensor (100-1; 100-2) according to one of the preceding claims, wherein a distance (Al) between the detection sections (4.3, 5.3) of the two field conducting elements (4, 5) is a maximum of 50%, preferably a maximum of 25%, of a distance (A2) between the Wiegand wire (2) enclosing AMENDED SHEET (ARTICLE 19) base body sections (4.2, 5.2) of the two field conducting elements (4, 5).
6. Wiegand sensor (100-1) according to one of the preceding claims, wherein the two field conducting elements (4, 5) each have an electrically conductive coating (4.1, 5.1) which forms the electrically conductive contacting means (4.4, 4.6, 5.4, 5.6) arranged on the respective field conducting element (4, 5).
7. Wiegand sensor (100-1) according to claim 6, wherein the first sensor coil end (3.2) is electrically conductively attached to the electrically conductive coating (4.1) of the first field conducting element (4) and the second sensor coil end (3.3) is electrically conductively attached to the electrically conductive coating (5.1) of the second field conducting element (5).
8. Wiegand sensor (100-2) according to one of claims 1 to 5, wherein: an electrically conductive first sheet metal body (6) is provided, in which the first field conducting element (4) is arranged and which forms the electrically conductive contacting means (4.4, 4.6) arranged on the first field conducting element (4), and an electrically conductive second sheet metal body is provided, in which the second field conducting element is arranged and which forms the electrically conductive contacting means (5.4, 5.6) arranged on the second field conducting element (5).
9. Wiegand sensor (100-2) according to claim 8, wherein the first sensor coil end (3.2) is electrically conductively attached to the first sheet metal body and the second sensor coil end (3.3) is electrically conductively attached to the second sheet metal body. AMENDED SHEET (ARTICLE 19) 10. Wiegand sensor (100-1; 100-2) according to one of the preceding claims, wherein the two field conducting elements (4, 5) are each overmolded by the sensor housing (1).
11. Wiegand sensor arrangement comprising: a shaft (102-1; 102-2), an excitation magnet (103-1; 103-2) arranged on the shaft (102-1; 102-2), and a Wiegand sensor (100-1; 100-2) with: a Wiegand wire (2), a sensor coil (3) surrounding the Wiegand wire (2), a first field conducting element (4) arranged at a first end (2.1) of the Wiegand wire (2), and a second field conducting element (5) arranged at a second end (2.2) of the Wiegand wire (2) opposite the first end (2.1), wherein the two field conducting elements (4, 5) each have a detection section (4.3, 5.3) which is arranged between the Wiegand wire (2) and the excitation magnet (103-1; 103-2) and which is directed in the direction of a center plane (M) extending transversely to the Wiegand wire (2) through the center point of the Wiegand wire (2), and wherein the detection sections (4.3, 5.3) of the two field conducting elements (4, 5) are each designed to point away from the Wiegand wire (2).
12. Wiegand sensor arrangement according to claim 11, wherein the detection sections (4.3, 5.3) of the two field conducting elements (4, 5) are each formed to extend at an angle between 65° and 85°, preferably between 70° and 80°, to the center plane (M). AMENDED SHEET (ARTICLE 19) 13. Wiegand sensor arrangement according to one of claims 11 or 12, wherein the Wiegand sensor (100-1; 100-2) is arranged radially adjacent to the excitation magnet (103-1; 103-2).
14. Wiegand sensor arrangement according to one of claims 11 to 13, wherein a winding region (3.1) of the sensor coil (3) in the region of the center plane (M) has an outer diameter (D1) which is larger than an outer diameter (D2) in the region of an axial end of the winding region (3.1).
15. Wiegand sensor arrangement according to one of claims 11 to 14, wherein a distance (Al) between the detection sections (4.3, 5.3) of the two field conducting elements (4, 5) is a maximum of 50%, preferably a maximum of 25%, of a distance (A2) between the base body sections (4.2, 5.2) of the two field conducting elements (4, 5) enclosing the Wiegand wire (2).
16. Wiegand sensor arrangement according to one of claims 11 to 15, wherein the Wiegand sensor (100-1; 100-2) comprises a sensor housing (1) in which the Wiegand wire (2), the sensor coil (3) and the two field conducting elements (4, 5) are fastened, and wherein the detection sections (4.3, 5.3) of the two field conducting elements (4, 5) protrude from the sensor housing (1) on a detection side (E) of the sensor housing (1) facing the excitation magnet (103-1; 103-2).
17. Wiegand sensor arrangement according to claim 16, wherein the two field conducting elements (4, 5) are each overmolded by the sensor housing (1). AMENDED SHEET (ARTICLE 19) 18. Wiegand sensor arrangement according to one of claims 11 to 17, wherein an electrically conductive contacting means (4.6, 5.6) is arranged on each of the two field conducting elements (4, 5) and is electrically connected to the sensor coil (3).
19. Wiegand sensor arrangement according to one of claims 16 or 17 and claim 18, wherein the two field conducting elements (4, 5) each have a contacting section (4.5, 5.5) protruding from the sensor housing (1), and wherein the contacting means (4.6, 5.6) are each arranged outside the sensor housing (1) on the contacting section (4.5, 5.5) of the respective field conducting element (4, 5).
20. Wiegand sensor arrangement according to one of claims 18 or 19, wherein the two field conducting elements (4, 5) each have an electrically conductive coating (4.1, 5.1) which forms the electrically conductive contacting means (4.6, 5.6) arranged on the respective field conducting element (4, 5).
21. Wiegand sensor arrangement according to claim 20, wherein a first sensor coil end (3.2) of the sensor coil (3) is electrically conductively attached to the electrically conductive coating (4.1) of the first field conducting element (4) and a second sensor coil end (3.3) of the sensor coil (3) is electrically conductively attached to the electrically conductive coating (5.1) of the second field conducting element (5).
22. Wiegand sensor arrangement according to one of claims 18 or 19, wherein the Wiegand sensor (100-1; 100-2) comprises an electrically conductive first sheet metal body (6) in which the first field conducting element (4) is arranged and which forms the electrically conductive contacting means (4.6) arranged on the first field conducting element (4), AMENDED SHEET (ARTICLE 19) and an electrically conductive second sheet metal body (7) in which the second field conducting element (5) is arranged and which forms the electrically conductive contacting means (5.6) arranged on the second field conducting element (5).
23. Wiegand sensor arrangement according to claim 22, wherein a first sensor coil end (3.2) of the sensor coil (3) is electrically conductively attached to the first sheet metal body (6) and a second sensor coil end (3.3) of the sensor coil (3) is electrically conductively attached to the second sheet metal body (7). AMENDED SHEET (ARTICLE 19)