Search

CN-122015631-A - Scale element for an inductive angle measuring device

CN122015631ACN 122015631 ACN122015631 ACN 122015631ACN-122015631-A

Abstract

The invention relates to a scale element (2) for an inductive angle measuring device, comprising a base (2.1) on which an graduation track (2.2) is arranged. The graduation track (2.2) is formed by a periodic sequence of alternately arranged conductive graduation regions (2.21) and non-conductive graduation regions (2.22) along the circumferential direction (x), wherein the conductive graduation regions (2.21) are each formed by a layer of conductive material. At least one hole (2.11) is arranged in the base (2.1). The electrically conductive graduation regions (2.21) each have an opening (2.211), wherein the electrically conductive material surrounds the opening (2.211). At least in one of the electrically conductive graduation regions (2.21), a hole (2.11) is arranged in the base (2.1) in such a way as to pass through the opening (2.211). Furthermore, two adjacent conductive graduation regions (2.21) in the circumferential direction (x) are designed such that the angular-dependent distances (alpha, beta, gamma) between the conductive layers of the conductive graduation regions in the radial direction are of different magnitudes.

Inventors

  • MARTIN HEUMANN
  • Christopher Heinemann

Assignees

  • 约翰内斯.海德汉博士有限公司

Dates

Publication Date
20260512
Application Date
20251024
Priority Date
20241111

Claims (11)

  1. 1. A scale element (2) for an inductive angle measuring device, having a base (2.1) on which an graduation track (2.2) is arranged, wherein, The graduation track (2.2) is formed by a periodic sequence of alternately arranged conductive graduation areas (2.21) and non-conductive graduation areas (2.22) along a circumferential direction (x), wherein the conductive graduation areas (2.21) are respectively formed by layers which are made of conductive material and extend along the circumferential direction (x) and a radial direction, wherein, At least one hole (2.11) is arranged in the base (2.1) for fixing the scale element (2) at a mechanical component, wherein, At least one of the electrically conductive graduation regions (2.21) has an opening (2.211), wherein an electrically conductive material surrounds the opening (2.211), wherein, In at least one of the electrically conductive graduation areas (2.21), at least one of the holes (2.11) is arranged in the base (2.1) in such a way as to pass through the opening (2.211), It is characterized in that the method comprises the steps of, Two electrically conductive graduation regions (2.21) adjacent to one another in the circumferential direction (x) are designed such that the angular distances (alpha, beta, gamma) between the electrically conductive layers of the electrically conductive graduation regions in the radial direction are of different magnitudes.
  2. 2. A scale element (2) according to claim 1, wherein in the non-conductive indexing region (2.22) a further aperture (2.11) is arranged in the substrate (2.1).
  3. 3. The scale element (2) according to any of the preceding claims, wherein the indexing track (2.2) has n electrically conductive indexing areas (2.21) and m holes (2.11) are arranged in the substrate (2.1), wherein n +.m is applicable.
  4. 4. A scale element (2) according to any of the preceding claims, wherein n < m applies.
  5. 5. A scale element (2) according to any of the preceding claims, wherein n is an odd number and m is an even number.
  6. 6. A scale element (2) according to any of the preceding claims, wherein the first pitch (a) and the second pitch (β) are larger than a third pitch (γ) located radially between the first pitch and the second pitch (a, β).
  7. 7. The scale element (2) according to any of the preceding claims, wherein at least one electrically conductive graduation area (2.21) is delimited in the circumferential direction (x) by a convex contour.
  8. 8. The scale element (2) according to any of the preceding claims, wherein at least one electrically conductive graduation area (2.21) is delimited in the circumferential direction (x) by a circular contour.
  9. 9. The scale element (2) according to any of the preceding claims, wherein the indexing track (2.2) has n electrically conductive indexing areas (2.21) and the scale element (2) comprises p fixing elements (2.4) arranged in the holes (2.11), wherein n +.p is applicable.
  10. 10. A scale element (2) according to claim 9, wherein n < p applies.
  11. 11. A scale element (2) according to claim 9 or 10, wherein n is an odd number and p is an even number.

Description

Scale element for an inductive angle measuring device Technical Field The invention relates to a scale element for an inductive angle measuring device for determining the angular position of the scale element relative to a scanning element. Inductive angle measuring devices are used, for example, to determine the angular position of relatively rotating mechanical components. In inductive angle measuring devices, the excitation track and the receiving track are usually arranged in the form of conductive paths on a common multilayer printed circuit board, which is fixedly connected to the stator of the angle measuring device, for example. On the opposite side of the printed circuit board, a scale element is arranged, on which an graduation structure is provided, and which is fixedly connected to the movable part of the angle measuring device. When a time-varying electrical excitation current is applied to the excitation track, a position-dependent signal is generated in the receiving track during the relative movement between the scale element and the scanning element. These signals are then further processed in an evaluation circuit. Background A scale element for an inductive angle measuring device is known from EP 4 421 A1 of the applicant. Wherein the scale element comprises two graduation tracks, each graduation track being made up of a periodic sequence of conductive graduation regions and non-conductive graduation regions in alternating sequence. The scale element is fixed in the mounting holes by screws, all of which are disposed within the electrically conductive indexing structure. Disclosure of Invention The object of the present invention is to provide a scale element which is compact and economical to produce, which can provide flexible installation possibilities, while still being able to be used in an inductive angle measuring device which works relatively accurately. According to the invention, this technical problem is solved by the features of the invention. A scale element suitable for and defining an angle measuring device for use with an inductive type comprises a substrate on which an indexing track is provided. The graduation track is formed by a periodic sequence of alternately arranged conductive graduation regions and relatively non-conductive graduation regions in the measuring direction, wherein the conductive graduation regions are each formed by a layer of conductive material. The layer or layer surface extends in a circumferential direction on the one hand and in a radial direction on the other hand. Furthermore, at least one hole is arranged in the base and is provided, which hole is adapted to fix the scale element at the mechanical part. At least one of the electrically conductive graduation regions has an opening, wherein the electrically conductive material surrounds the opening. Furthermore, at least in one of the electrically conductive graduation regions, at least one aperture is arranged in the substrate in such a way as to pass through the opening. The two circumferentially adjacent conductive graduation regions are designed such that the angular distances between the conductive layers of the conductive graduation regions in the circumferential direction in the radial direction are of different magnitudes. Thus, adjacent conductive graduation regions have different angular dependent spacing (in the circumferential direction) at different distances from the axis. In other words, if a first distance between two points located opposite in the circumferential direction on the contour of a certain conductive graduation region is measured on the radially inner side, the second distance at a position offset from it in the radial direction has a different magnitude than the first distance. The opposite points lie in particular on the same virtual circumferential line, the center point of which lies on the axis. The relevant conductive graduation areas or conductive layers are not linearly distributed in the radial direction over their entire radial extension within the contour. The angular-dependent distance between two adjacent electrically conductive graduation regions in the circumferential direction relates to the respective central angle about the axis, here expressed in degrees. In particular, a first distance is present between two adjacent electrically conductive graduation regions in the circumferential direction, and a second distance is present at a position radially offset therefrom. Wherein the first pitch and the second pitch can be greater than a third pitch radially between the first pitch and the second pitch. The conductive graduation area is formed from a layer of conductive material. The relatively non-conductive indexing region can be formed of plastic (e.g., printed circuit board material). The scale element can be used as a substrate, preferably a plastic printed circuit board material. Alternatively, the substrate may be formed from a layered structure