US 12,326,334 B2
Inductive position-measuring device
Christoph Heinemann, Uebersee (DE); Martin Heumann, Traunstein (DE); and Marc Oliver Tiemann, Tettenhausen (DE)
Assigned to DR. JOHANNES HEIDENHAIN GmbH, Traunreut (DE)
Filed by DR. JOHANNES HEIDENHAIN GmbH, Traunreut (DE)
Filed on Apr. 27, 2023, as Appl. No. 18/307,974.
Claims priority of application No. 22174216 (EP), filed on May 19, 2022.
Prior Publication US 2024/0102787 A1, Mar. 28, 2024
Int. Cl. G01B 7/00 (2006.01); G01D 5/20 (2006.01); G01D 5/245 (2006.01)
CPC G01B 7/003 (2013.01) [G01D 5/2053 (2013.01); G01D 5/2451 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An inductive position-measuring device, comprising:
a scanning element having at least one excitation conductor, a first receiver track and a second receiver track, the first receiver track including at least one receiver conductor, which extends along a first direction according to a first periodic pattern, and which extends at least over a length L, and the second receiver track including at least one receiver conductor, which extends along the first direction according to a second periodic pattern, and which extends over at least the same length L; and
a graduation element disposed to be movable relative to the scanning element along the first direction, the graduation element including a graduation track having graduation structures along the first direction, the graduation structures being formed of ridges and gaps, wherein the ridges have different widths in the first direction or the gaps have different depths or different widths in the first direction,
wherein the inductive position-measuring device is configured such that an electromagnetic field generated by the at least one excitation conductor can be modulated by the graduation track as eddy currents are induced in an area of the ridges,
wherein the at least one receiver conductor of the first receiver track is configured to generate a first signal having a first period length,
wherein the at least one receiver conductor of the second receiver track is configured to generate a second signal having a second period length, and
wherein n times the first period length is equal to m times the second period length, with m and n being relatively prime, and n times the first period length and m times the second period length both being less than or equal to the length L.