Scanning element and inductive position-measuring mechanism having this scanning element

Abstract

To provide a scanning element for an inductive position-measuring mechanism that works relatively accurately, is compact, and can be inexpensively manufactured.SOLUTION: The present invention relates to a scanning element for measuring a position along a measuring direction U, comprising a multilayer printed circuit board. The printed circuit board has a first receiving track that includes a first receiving conductor track 1.111. The printed circuit board additionally has a connecting conductor comprising a first conductor row 1.141 and a second conductor row 1.142. The connecting conductor crosses the first receiving track. The first conductor row 1.141 and the second conductor row 1.142 are such that in at least one first section S1 of the connecting conductor, the first conductor row 1.141 is arranged offset in a positive measuring direction U+ relative to the second conductor row 1.142, and such that in at least one second section of the connecting conductor, the second conductor row 1.142 is arranged offset in a positive measuring direction U+ relative to the first conductor row 1.141.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The invention relates to a scanning element for an inductive position measuring mechanism according to claim 1 for determining the position of the scanning element relative to a scale element and to a position measuring mechanism comprising such a scanning element.

[0002] Inductive position measuring mechanisms are used, for example, as angle measuring instruments for determining the angular position of machine parts that can rotate relative to one another. In inductive position measuring mechanisms, an excitation track and a receiving track are often provided, for example, in the form of conductor tracks, on a common, usually multilayer, printed circuit board, which is fixedly connected, for example, to the stator of the angle measuring instrument. A scale element is located opposite the printed circuit board, on which a graduation structure is provided, and which is non-rotatably connected to the rotor of the angle measuring instrument. When a time-alternating excitation current is applied to the excitation conductor, a signal that depends on the angular position is generated in the receiving track during the relative rotation between the rotor and the stator. These signals are then further processed in the evaluation electronics.

[0003] Such inductive position measuring mechanisms are often used as measuring devices for electric drives to determine the relative movement or relative position of corresponding machine parts, with the generated angular position values ​​of the subsequent electronics being supplied via a corresponding interface arrangement for controlling the drive.

[0004] Inductive position measuring mechanisms are also often used to directly measure longitudinal displacement along an axis, in which case the same measurement principle applies as in the angle measuring instruments described above, except that in this case the receiving track and graduation structure run along a linear axis. [Background technology]

[0005] From EP 1 881 299 B1 a position measuring mechanism is known which has two receiving tracks and leads out from both sides of each receiving track. In the applicant's EP 3702737 B1, an inductive position measuring mechanism is disclosed which has two receiving tracks, with a connecting wire being routed through a gap in the outer receiving track. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] EP1881299B1 [Patent Document 2] EP3702737B1 Summary of the Invention [Problem to be solved by the invention]

[0007] The problem underlying the present invention is to provide a scanning element for an inductive position measuring mechanism that is relatively accurate, compact and inexpensive to manufacture. [Means for solving the problem]

[0008] This problem is solved according to the invention by the features of claim 1. The scanning element, suitable for and determined for an inductive position measuring mechanism for measuring a position along a measuring direction, includes a printed circuit board having a first layer and a second layer. The printed circuit board further includes a first receiving track including at least one first receiving conductor and at least one connecting conductor including a first conductor array and a second conductor array. The connecting conductor crosses or transverses the first receiving track. The printed circuit board further includes a second receiving track including at least one second receiving conductor. The first conductor array is electrically coupled to the second receiving conductor at a (first) point, and the second conductor array is electrically coupled to the second receiving conductor at another (second) point, so that a signal received by the second receiving conductor can be picked up by the conductor array. Alternatively or additionally, the printed circuit board has a first excitation conductor path, the first conductor array being electrically coupled to the first excitation conductor path at a (third) point, and the second conductor array being electrically coupled to the first excitation conductor path at another (fourth) point, so that an excitation current can be introduced into the first excitation conductor path via the first and second conductor arrays. The first and second conductor arrays run in at least one first section of the connecting conductor such that the first conductor array is offset in the positive measuring direction relative to the second conductor array, and in at least one second section of the connecting conductor such that the second conductor array is offset in the positive measuring direction relative to the first conductor array.

[0009] The measurement direction can be linear, circumferential, or tangential. In linear measurements, the left direction (relative displacement) can be used as the positive measurement direction, and the right direction can be considered the negative measurement direction. In angular position measurements, i.e., in the circumferential direction, the clockwise measurement direction can be used as the positive measurement direction, and the counterclockwise measurement direction can be used as the negative measurement direction. In particular, the first excitation conductor runs circumferentially or along the measurement direction.

[0010] Advantageously, both the first and second receiving tracks and the first excitation conductor track run along the circumferential direction or along the measuring direction. In a further embodiment of the invention, the (first) location where the first conductor array is electrically coupled to the second reception conductor is in a first layer of the printed circuit board, and the (second) location where the second conductor array is electrically coupled to the second reception conductor is in a second layer. Alternatively or additionally, the (third) location where the first conductor array is electrically coupled to the first excitation conductor is in the first layer, and the (fourth) location where the second conductor array is electrically coupled to the first excitation conductor is in the second layer.

[0011] In an advantageous embodiment of the invention, the first receiving conductor and the first or second conductor array run parallel to one another in the same layer of the printed circuit board in part of the first section, alternatively or additionally, the first receiving conductor and the first or second conductor array run parallel to one another in the same layer of the printed circuit board in part of the second section.

[0012] Advantageously, in at least one third section of the connecting conductor, the first conductor array in the first layer and the second conductor array in the second layer are arranged so as to run one above the other, where the overlapping means that the conductor arrays are arranged in parallel tracks that are overlapping in a direction perpendicular to the printed circuit board.

[0013] In a further embodiment of the invention, the first and second conductor arrays run partly parallel to one another within the first and / or second section, and the first receiving conductor can then run in the same layer as these conductor arrays, in particular midway between the parallel-running first and second conductor arrays.

[0014] Advantageously, the tracks of the first conductor array and the tracks of the second conductor array transition from the first layer to the second layer within the first section and / or the second section. In an advantageous embodiment of the invention, the first conductor array runs in the first layer along a subsection within the first section, and the first receiving conductor also runs in this region within the first layer, with the first conductor array running parallel to the first receiving conductor within this subsection. Optionally, the first receiving track includes a further first receiving conductor running in the second layer within the first section, and the first conductor array crosses this further first receiving conductor within this subsection.

[0015] The layer of the printed circuit board here refers to a conductive layer, as is common in printed circuit board technology. The printed circuit board can be formed as a rigid printed circuit board, for example, with an FR4 core. Alternatively, the printed circuit board can be formed as a thin flexible printed circuit board or a conductive film, for example, based on a polyamide film. The printed circuit board can have a thickness of less than 1 mm, preferably less than 500 μm, in particular less than 200 μm. When the thickness of the printed circuit board is small, it can be advantageous if the printed circuit board is mounted on a relatively thick metal base.

[0016] Advantageously, the first excitation conductor path can be energized by an excitation current, which typically has a current intensity that alternates over time (alternating current or mixed current). The excitation current can be generated by electronic components, i.e., the trajectory of the excitation current can be shaped by the electronic components. Of course, the same considerations can be applied to the excitation voltage, since there is a physical relationship between the current intensity and the voltage intensity. The electronic components can be mounted on a printed circuit board. In a further embodiment of the invention, the signals that can be generated by the first and second receiving tracks can be further processed by electronic components, which in particular constitute an evaluation circuit.

[0017] That is, the electronic components can be elements of various electronic circuits, i.e., assigned to different circuits, e.g., a particular electronic component can be an element of a circuit for generating an excitation current, or a further electronic component can be an element of a further circuit for evaluating or further processing a signal.

[0018] In a further embodiment of the invention, the printed circuit board has exactly two layers. In particular, the scanning element may have a base on which the printed circuit board is arranged or applied.

[0019] The base is preferably made of a metal material, in particular in the form of a sheet metal, but may also be made of a soft magnetic material, for example. In an advantageous embodiment of the invention, the first and second receiving tracks are arranged curvedly around an axis, with the first receiving track being arranged radially outward of the second receiving track with respect to the axis. Such a scanning element is used, inter alia, for determining angular position. In particular, the first and second receiving tracks may be arranged and configured to wrap around the axis over 360° without a gap.

[0020] According to a further aspect, the present invention also includes an inductive position measurement mechanism having a scanning element and a scale element, the scale elements being spaced apart relative to the printed circuit board in a direction oriented perpendicular to the measurement direction.

[0021] Advantageous configurations of the invention can be seen from the dependent claims. Further details and advantages of the scanning element according to the invention will become apparent from the following description of two exemplary embodiments based on the accompanying drawings. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 2 is an overhead view of one face of the scanning element. [Figure 2] FIG. 1 is an overhead view of one face of a scale element. [Figure 3] FIG. 2 is a partial cross-sectional view of a scanning element. [Figure 4] FIG. 10 is a detailed overhead view of a scanning element with connecting leads. [Figure 5] FIG. 10 is a detailed overhead view of one of the connecting conductors. [Figure 6]FIG. 10 is a detailed overhead view of another connecting conductor. [Figure 7] FIG. 10 is a three-dimensional overhead view of the details of the connecting conductor. [Figure 8] FIG. 10 is a detailed overhead view of a scanning element with connecting leads according to a second exemplary embodiment. [Figure 9] FIG. 10 is a detailed overhead view of a connecting conductor according to a second exemplary embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0023] 1 and 2, the present invention will be described using a position measuring mechanism having a scanning element 1 that can be used to capture an angular position relative to a scale element 2. When the position measuring mechanism is assembled, the scale element 2 is arranged rotatably about an axis R relative to the scanning element 1, which axis R is oriented perpendicular to the plane of the drawing in FIGS. 1 and 2. This position measuring mechanism allows the position, i.e. the angular position, in a measuring direction U (here, the circumferential direction), to be determined, where a distinction can be made between a positive measuring direction U+, which is oriented clockwise, and a negative measuring direction U−, which is oriented counterclockwise.

[0024] The scanning element 1 includes a printed circuit board 1.1 having several layers A and B, here exactly two layers A and B, according to FIG. 3 . In the exemplary embodiment shown, the printed circuit board 1.1 is very thin, approximately 100 μm thick, and therefore may also be referred to as a film. For mechanical reinforcement, the printed circuit board 1.1 rests on a relatively thick base 1.3, which may consist of, inter alia, a metal material. An approximately 50 μm thick electrical insulating layer 1.4 is arranged on the base 1.3, and a second layer B is applied on the electrical insulating layer 1.4. A further approximately 15 μm thick insulating layer 1.5 is located between the second layer B and the first layer A. Finally, an insulating layer 1.6 is located on the layer A, which is also approximately 15 μm thick. Both layers A and B are each approximately 12 μm thick. In the exemplary embodiment shown, the insulating layers 1.4, 1.5, and 1.6 consist of polyimide. The scanning element 1 is used to scan the scale element 2 .

[0025] The printed circuit board 1.1 comprises a first (inner) excitation conductor track 1.18 and a second excitation conductor track 1.19. The excitation conductor tracks 1.18, 1.19 run in a first layer A and a second layer B.

[0026] To determine the angle information, a first receiving track 1.11 and a second receiving track 1.12 are arranged on the printed circuit board 1.1. Excitation conductor tracks 1.18, 1.19 surround the second receiving track 1.12 or the first receiving track 1.11 and run along the measuring direction U or the circumferential direction.

[0027] In the exemplary embodiment shown, each of the receiver tracks 1.11, 1.12 includes a respective receiver conductor 1.111, 1.121 (see, for example, FIG. 4 ), which is circumferentially offset, thereby resulting in four phase-shifted signals. In the figure, only one reference numeral is used for the receiver conductors 1.111, 1.121 belonging to the same receiver track 1.11, 1.12. For example, all receiver conductors 1.111 of the first receiver track 1.11 are therefore only one reference numeral. Additionally, the first receiver conductor 1.111 of the first receiver track 1.11 runs through different layers A, B of the printed circuit board 1.1, connecting vias to prevent undesired short circuits at intersections. The same applies to the receiver conductors 1.121 of the second receiver track 1.12. Although, strictly speaking, each of the first and second receiving conductors 1.111, 1.121 consists of a number of conductor strips distributed across two planes or layers A and B, respectively, in the following, such structures will be referred to collectively as a single receiving conductor 1.111, 1.121. In Figures 4 to 9, the conductors in the areas where they run only within the first layer A are shown in black. In addition, the conductors in the areas where they run only within the second layer B are shown in white with a black border. Finally, the conductors in the areas where they overlap and run within the first layer A and the second layer B are shown in dashed black and white.

[0028] The receiving conductors 1.111, 1.121 have a spatially periodic trajectory that is substantially sinusoidally or sinusoidally shaped. The receiving conductors 1.111 of the first receiving track 1.11 have a period length λ1 (FIG. 1), while the receiving conductors 1.121 of the second receiving track 1.12 have a period length λ2. In the exemplary embodiment presented, adjacent receiving conductors 1.111, 1.121 within one receiving track 1.11, 1.12 are offset from each other by 1 / 8 of a complete sinusoidal period (π / 4 or 45° along the circumferential or measuring direction U). The receiving conductors 1.111, 1.121 are electrically connected to provide 0° and 90° signals on the one hand and 45° and 135° signals on the other hand. A first position signal can be determined from the 0° and 90° signals, and a second position signal that is redundant to the first position signal can be determined from the 45° and 135° signals.

[0029] In the presented exemplary embodiment, the second period length λ2 is smaller than the first period length λ1 (λ2 / λ1=7 / 8). The scanning element 1 comprises an electronic circuit with a number of electronic chips 1.2 which are only diagrammatically shown in Figure 1. In the presented exemplary embodiment, the electronic circuit also includes ASIC chips.

[0030] The signals received by the second receiving track 1.12 must be conducted to the electronic circuit, in particular to the area serving as the evaluation circuit. For this purpose, there are four connecting conductors 1.13 on the printed circuit board, each of which has a first conductor sequence 1.131 and a second conductor sequence 1.132.

[0031] The first conductor array 1.131 (FIG. 5) is electrically coupled or contacted with the second receiving conductor 1.121 (FIG. 4) at a first location, e.g., at a first end of the second receiving conductor 1.121. This first location is located on the first layer A of the printed circuit board 1.1. Additionally, the second conductor array 1.132 is electrically coupled or contacted with the second receiving conductor 1.121 at a different second location, e.g., at a second end of the second receiving conductor 1.121. This different second location is located on the second layer B of the printed circuit board 1.1, and in the illustrated embodiment, the first location of the first conductor array 1.131 and the different second location of the second conductor array 1.132 overlap in the layer structure of the printed circuit board 1.1. This type of contact allows the received signal to be picked up in the form of a voltage at the end of the receiving conductor 1.121.

[0032] The printed circuit board 1.1 also has a further connecting conductor 1.14, which likewise includes a first conductor array 1.141 and a second conductor array 1.142, for supplying the first excitation conductor path 1.18 with an excitation current. The first conductor array 1.141 is electrically connected to or in contact with the first excitation conductor path 1.18 at a third location, e.g., at a first end of the first excitation conductor path 1.18. This third location is located on the first layer A of the printed circuit board 1.1. The second conductor array 1.142 is also electrically connected to or in contact with the first excitation conductor path 1.18 at a fourth location, e.g., at a second end of the first excitation conductor path 1.18. This fourth location is located on the second layer B of the printed circuit board 1.1, and in the example embodiment shown, the third location of the first conductor array 1.141 overlaps with the fourth location of the second conductor array 1.142. This configuration allows the first excitation conductor path 1.18 to be supplied with an excitation current.

[0033] The printed circuit board 1.1 is configured so that the connecting conductors 1.13, 1.14 cross the first receiving track 1.11. In this connection, it is important that the connecting conductor 1.13 for the second receiving track 1.12 captures as little noise signals as possible when crossing the first receiving track 1.11. Similarly, it should be prevented that the excitation current flowing through the connecting conductor 1.14 for the first excitation conductor 1.18 causes significant noise in the first receiving track 1.11.

[0034] 5, the track of the connecting conductor 1.13 is configured such that, within the first section S1, the first conductor array 1.131 and the second conductor array 1.132 run such that the first conductor array 1.131 is offset in the positive measuring direction U+ relative to the second conductor array 1.132. Additionally, within the second section S2 of the connecting conductor 1.13, the second conductor array 1.132 is offset in the positive measuring direction U+ relative to the first conductor array 1.131. In the exemplary embodiment shown, within the third section S3 of the connecting conductor 1.13, the first conductor array 1.131 and the second conductor array 1.132 run overlappingly on the first layer A and the second layer B. That is, the conductor arrays 1.131 and 1.132 each run partly on the first layer A and partly on the second layer B. The transition between layers A and B is made by vias 1.1311 in the case of the first conductor array 1.131 and by vias 1.1321 in the case of the second conductor array 1.132.

[0035] 6, the path of the connecting conductor 1.14 used to connect the first excitation conductor 1.18 can be explained. Here, too, the first conductor array 1.141 and the second conductor array 1.142 run such that, within the first section S1, the first conductor array 1.141 is offset in the positive measuring direction U+ relative to the second conductor array 1.142. Additionally, within the second section S2 of the connecting conductor 1.14, the second conductor array 1.142 is offset in the positive measuring direction U+ relative to the first conductor array 1.141. Furthermore, in the illustrated exemplary embodiment, within the third section S3 of the connecting conductor 1.14, the first conductor array 1.141 and the second conductor array 1.142 run overlappingly on the first layer A and the second layer B. That is, the first conductor array 1.141 and the second conductor array 1.142 are arranged so as to overlap each other in a direction perpendicular to the printed circuit board 1.1. The third section S3 extends over the entire length of the connecting conductor 1.14.

[0036] To visualize the paths of the first and second conductor arrays 1.141, 1.142 in three dimensions, reference can be made to FIG. 7. Starting from the left side of this diagram, within one section S3, the first conductor array 1.141 on the first layer A of the printed circuit board 1.1 and the second conductor array 1.142 on the second layer B initially run one above the other. This arrangement, which is inherently noise-resistant, cannot be maintained in subsequent runs, since the connecting conductor 1.14 would then have to cross the first receiving track 1.11. Therefore, the paths of the first and second conductor arrays 1.141, 1.142 are first reoriented on both layers A, B so that they are routed along subsections parallel to the first receiving conductor 1.111 on the same layers A, B. Within this section, the first conductor array 1.141 in the first layer A crosses the first receiving conductor 1.111 running in the second layer B. Additionally, the second conductor array 1.142 running in the second layer B crosses the first receiving conductor 1.111 running in the first layer A. The first and second conductor arrays 1.141, 1.142 run within these sections up to vias 1.1411, 1.1412, where they further transition from the first layer A to the second layer B of the printed circuit board 1.1 or vice versa. 7, the first and second conductor arrays 1.141, 1.142 are again oriented parallel to the respective first receiving conductors 1.111, this parallelism being relative to the respective first receiving conductors 1.111 in the same layers A, B on which the first and second conductor arrays 1.141, 1.142 also run. Finally, the first and second conductor arrays 1.141, 1.142 again enter a third section S3, where they are arranged one on top of the other.

[0037] FIG. 2 shows a top view of a disc-shaped scale element 2. In the illustrated exemplary embodiment, the scale element 2 comprises a support made of epoxy resin, on which two graduation tracks 2.1, 2.2 are arranged. The graduation tracks 2.1, 2.2 are ring-shaped and are arranged on the support concentrically with respect to the axis R, with different diameters. The graduation tracks 2.1, 2.2 each comprise a periodic sequence of alternating conductive graduation fields 2.11, 2.21 and non-conductive graduation fields 2.12, 2.22. In the illustrated example, copper is applied to the support as the material for the conductive graduation fields 2.11, 2.21. In contrast, the support was not coated in the non-conductive graduation fields 2.12, 2.22. Due to the configuration with two graduation tracks 2.1, 2.2, the angular position of the scale element 2 can be determined absolutely. The outermost graduation track 2.1 of the scale element 2 has a greater number of graduation areas 2.11, 2.12 along the circumference, so that the maximum resolution for measuring the angular position can be achieved with the graduation areas 2.11, 2.12.

[0038] In the assembled state, the scanning element 1 and the scale element 2 face each other with an axial distance or gap between them. Therefore, when the scale element 2 and the scanning element 1 rotate relative to each other, a signal dependent on the respective angular position can be generated in the receiving conductors 1.111, 1.121 by inductive effects. The prerequisite for the generation of such a signal is that the excitation conductors 1.18, 1.19 generate a time-varying electromagnetic excitation field in the area of ​​the respective scanned graduation structure. In the illustrated exemplary embodiment, the excitation conductors 1.18, 1.19 are configured as multiple single conductors traversed by a current in parallel planes. The electronic circuit of the scanning element 1 serves not only as an evaluation element but also as an excitation control element, which generates or generates an excitation current under its control, which then flows through the excitation conductors 1.18, 1.19. The excitation conductors 1.18, 1.19 are therefore energized by one and the same excitation control element via the connecting conductor 1.14. The first excitation conductor 1.18 and the second excitation conductor 1.19 are electrically connected in series.

[0039] When the excitation conductors 1.18, 1.19 are energized, a tubular or cylindrically oriented electromagnetic field is generated around them. The resulting field lines run around the excitation conductors 1.18, 1.19, and their direction depends, as is known, on the direction of the current in the excitation conductors 1.18, 1.19. Eddy currents are induced in the area of ​​the conductive graduation areas 2.11, 2.21, resulting in a field modulation that depends on the angular position. Correspondingly, the relative angular position can be measured by the receiving tracks 1.11, 1.12. The receiving conductors 1.111, 1.121 are arranged to provide signals in the receiving tracks 1.11, 1.12 that are phase-shifted by 90°, allowing the direction of rotation to be determined. The signals generated by the receiving tracks 1.11, 1.12 are further processed by an evaluation circuit.

[0040] A second exemplary embodiment is described with reference to Figures 8 and 9. Figures 8 and 9 show a connecting conductor 1.13' including a first conductor array 1.131' and a second conductor array 1.132', where the first conductor array 1.131' is electrically connected to the second receiving conductor 1.121 at one point and the second conductor array 1.132' is electrically connected to the second receiving conductor 1.121 at another point. The scanning element 1' according to the second exemplary embodiment also includes a further connecting conductor for the excitation conductor 1.18, which is not shown in the figures.

[0041] The first and second conductor arrays 1.131' and 1.132' run in the first sections S1' (here, three) of the connecting conductor 1.13' such that the first conductor array 1.131' is offset in the positive measuring direction U+ relative to the second conductor array 1.132'. In the second exemplary embodiment presented, the first sections S1' are adjacent to one another in the path of the connecting conductor 1.13'. Similarly, in the second sections S2' of the connecting conductor 1.13', the second conductor array 1.132' is offset in the positive measuring direction U+ relative to the first conductor array 1.131', and here the second sections S2' are arranged adjacent to one another. Accordingly, that is, here, between two first sections S1' there is a third section S3' where the conductor arrays 1.131', 1.132' overlap. Similarly, in the second exemplary embodiment, one third section S3' exists between two second sections S2'.

[0042] The scanning element 1;1' based on the presented exemplary embodiment allows for increased measurement accuracy of the position measuring mechanism, on the one hand, since no gaps are required in the receiving track, and on the other hand, since the layout of the connecting conductor paths 1.13, 1.14, 1.13' results in negligible noise in the measurement signal. [Explanation of symbols]

[0043] 1;1' scanning element 1.1;1.1' printed circuit board 1.11 First Received Track 1.111 first receiving conductor 1.12 Second receiving track 1.121 second receiving conductor 1.13;1.13', 1.14 connecting wire 1.131; 1.131', 1.141 First conductor row 1.1311;1.1321;1.1411;1.1412 via 1.132;1.132', 1.142 Second conductor array 1.18 First excitation conductor track 1.19 Second excitation conductor track 1.3 Foundation 1.4; Electrical insulating layer 1.5;1.6 insulating layer 2 Scale Elements 2.1;2.2 Scale track 2.11;2.21 Conductive scale area 2.12;2.22 and non-conductive scale area A. First layer B. Second layer R-axis S1;S1' First section S2;S2' Second section S3 Third Section U measurement direction U+ positive measurement direction U- negative measurement direction

Claims

1. A scanning element (1;1') for an inductive position measuring mechanism for measuring a position along a measuring direction (U), comprising a printed circuit board (1.1;1.1'), said printed circuit board (1.1;1.1') comprising: - has a first layer (A) and a second layer (B), - a first receiving track (1.11) containing a first receiving conductor (1.111), and - a connecting conductor (1.13; 1.13', 1.14) including a first series of conductors (1.131; 1.131', 1.141) and a second series of conductors (1.132; 1.132', 1.142), said connecting conductor (1.13; 1.13', 1.14) crossing said first receiving track (1.11), said printed circuit board (1.1; 1.1') further comprising: a) a second receiving track (1.12) including a second receiving conductor (1.121), the first conductor array (1.131; 1.131') being electrically connected to the second receiving conductor (1.121) at one point and the second conductor array (1.132; 1.132') being electrically connected to the second receiving conductor (1.121) at another point, or b) a first excitation conductor path (1.18), the first conductor array (1.141) being electrically connected to the first excitation conductor path (1.18) at one point and the second conductor array (1.142) being electrically connected to the first excitation conductor path (1.18) at another point, The first conductor array (1.131; 1.131', 1.141) and the second conductor array (1.132; 1.132', 1.142) are in at least one first section (S1; S1') of the connecting conductor (1.13; 1.13', 1.14), the first conductor sequence (1.131; 1.131', 1.141) is offset in the positive measuring direction (U+) relative to the second conductor sequence (1.132; 1.132', 1.142); and - scanning elements (1; 1') which run in at least one second section (S2; S2') of the connecting conductor (1.13; 1.13', 1.14) such that the second conductor array (1.132; 1.132', 1.142) is offset in the positive measuring direction (U+) relative to the first conductor array (1.131; 1.131', 1.141);

2. 2. A scanning element (1; 1') according to claim 1, wherein the first receiving conductor path (1.111) runs partially parallel to the first conductor row (1.131; 1.131', 1.141) and / or the second conductor row (1.132; 1.132', 1.142) within the first section (S1; S1') and / or the second section (S2; S2').

3. 3. A scanning element (1; 1') according to claim 1 or 2, wherein in at least one third section (S3) of the connecting conductor (1.13; 1.13', 1.14), the first conductor array (1.131; 1.131', 1.141) in the first layer (A) and the second conductor array (1.132; 1.132', 1.142) in the second layer (B) are arranged to run overlapping each other.

4. 3. A scanning element (1; 1') according to claim 1 or 2, wherein within the first section (S1; S1') and / or the second section (S2; S2'), the first conductor row (1.131; 1.131', 1.141) and the second conductor row (1.132; 1.132', 1.142) run partially parallel to each other.

5. 5. A scanning element (1) according to claim 4, wherein the first receiving conductor path (1.111) runs between the first and second parallel-running conductor rows (1.131, 1.141, 1.132, 1.142) in the same layer (A, B) as the conductor rows (1.131, 1.141; 1.132, 1.142).

6. 3. A scanning element (1; 1') according to claim 1 or 2, wherein both the trajectories of the first conductor array (1.131; 1.131', 1.141) and the second conductor array (1.132; 1.132', 1.142) move from the first layer (A) to the second layer (B) within the first section (S1; S1') and / or the second section (S2; S2').

7. Within said first section (S1; S1') along a subsection: the first conductor array (1.131; 1.131', 1.141) runs in the first layer (A), and the first receiving conductor (1.111) also runs in the first layer (A), 3. A scanning element (1; 1') according to claim 1 or 2, wherein in said subsection the first conductor array (1.131; 1.131', 1.141) runs parallel to the first receiving conductor (1.111).

8. 8. A scanning element (1; 1') as claimed in claim 7, wherein the first receiving track (1.11) includes a further first receiving conductor (1.111) running in the second layer (B) within the first section (S1; S1'), and the first conductor array (1.131; 1.131', 1.141) crosses the further first receiving conductor (1.111) within the subsection.

9. Scanning element (1; 1') according to claim 1 or 2, wherein the printed circuit board (1.1; 1.1') has exactly two layers (A, B).

10. The printed circuit board (1.1; 1.1') a) a second receiving track (1.12) including a second receiving conductor (1.121), the first conductor array (1.131; 1.131') being electrically connected to the second receiving conductor (1.121) at one location in the first layer (A), and the second conductor array (1.132; 1.132') being electrically connected to the second receiving conductor (1.121) at another location in the second layer (B), or b) A scanning element (1; 1') according to claim 1 or 2, having a first excitation conductor path (1.18), wherein the first conductor array (1.141) is electrically connected to the first excitation conductor path (1.18) at one location in the first layer (A), and the second conductor array (1.142) is electrically connected to the first excitation conductor path (1.18) at another location in the second layer (B).

11. 3. A scanning element (1; 1') according to claim 1 or 2, characterized in that the scanning element (1; 1') has a base (1.3) on which the printed circuit board (1.1; 1.1') is arranged.

12. Scanning element (1; 1') according to claim 11, characterized in that the base (1.3) is made of a metallic material.

13. 3. A scanning element (1; 1') according to claim 1 or 2, wherein the first receiving track (1.11) and the second receiving track (1.12) are arranged curvedly around an axis (R), and the first receiving track (1.11) is arranged radially outward of the second receiving track (1.12) with respect to the axis (R).

14. 14. A scanning element (1; 1') according to claim 13, wherein the first receiving tracks (1.11) are arranged so as to circumnavigate the axis (R) over 360° without gaps.

15. 3. An inductive position measuring mechanism comprising a scanning element (1; 1') and a scale element (2) according to claim 1 or 2, wherein the scale element (2) is arranged at a distance from the printed circuit board (1.1; 1.1') in a direction oriented perpendicular to the measuring direction (U).

Images