Measuring ring with measuring tape and method for arranging the measuring tape
AssigneeASM Automation Sensorik Messtechnik GmbH
InventorsKlaus Manfred Steinich, Gunnar Kamp
Life of this patent
Estimating the term…
Abstract
In order to be able to compensate different temperature expansion of a magnetic tape, (measuring tape) and a support ring in an angle sensor where the magnetic tape is applied to a circumference of a component and where a scanning head is used, the magnetic tape is fixated at the support ring at the most at one location of the circumference and otherwise supported at the circumference with a tension band, so that the measuring tape can perform a movement relative to the support ring, and/or the tension band due to the expansion in circumferential direction.
Claims16
A measuring ring (1), comprising:
- a rotatable support ring (2);
- a measuring element, having a measuring tape (3) on which scale embodiments (4) are configured, wherein the measuring element extends along the outer circumference of the support ring (2) and is attached thereto;
- a reading head (5) for reading the scale embodiments (4), wherein the reading head is arranged at a distance from the measuring tape (3), and is arranged relative thereto, movable in circumferential direction at a circumferential location,
- wherein a retaining element is arranged at the circumference of the support ring (2), wherein the retaining element radially retains the measuring tape (3) at the circumference;
- wherein the retaining element is a tension band (7) which pulls the measuring tape (3) radially against the circumference or slashes it radially against the circumference;
- wherein the measuring tape (3) is arranged along the outer circumference of the support ring (2);
- wherein the tension band (7) extending in circumferential direction (12) is longer than the measuring tape (3);
- wherein the measuring tape (3) is fixated at the support ring, in a form locking manner only at one location of the circumference in circumferential direction;
- wherein the measuring tape (3), when arranged on the outer circumference is supported between the tension band (7) and the outer circumference, at least with the majority of its longitudinal extension movable relative to the tension band (7) and/or relative to the outer circumference of the support ring (2).
A measuring ring (1), comprising:
- a rotatable support ring (2);
- a measuring element, having a measuring tape (3) on which scale embodiments (4) are configured, wherein the measuring element extends along the outer circumference of the support ring (2) and is attached thereto;
- a reading head (5) for reading the scale embodiments (4), wherein the reading head is arranged at a distance from the measuring tape (3), and is arranged relative thereto, movable in circumferential direction at a circumferential location,
- wherein a retaining element is arranged at the circumference of the support ring (2), wherein the retaining element radially retains the measuring tape (3) at the circumference;
- wherein the measuring tape (3) is configured with plural layers including a scale embodiment layer (14) and a support layer (15) and the support layer (15) has a smaller length expansion coefficient than the scale embodiment layer (14) and/or
- the measuring tape (3), support layer (15), is relievable from pressure in longitudinal direction of the measuring tape (3), when a radial inner and/or outer support is provided.
Dependencies are inferred from the claim text.