Position measuring device

By optimizing the design of the scale support and scanning structure assembly, the problem of large structural space requirements in existing position measurement devices has been solved, realizing compact and accurate position measurement of multi-degree-of-freedom objects.

CN122107895APending Publication Date: 2026-05-29DR JOHANNES HEIDENHAIN GMBH
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Patent Information

Application Number
CN202511690655.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-11-27
Filing Date
2025-11-18
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing position measurement devices require a large amount of structural space when detecting the relative position of two objects that can move relative to each other, which makes it impossible to obtain sufficient space in some applications.

Method used

A position measuring device was designed, which adopts a scale support with multiple measuring scales and a movable scanning structure assembly. By optimizing the plane intersection angle and the arrangement of scanning units, a compact structural design is achieved, and accurate measurements are performed in six degrees of freedom of motion.

Benefits of technology

It achieves precise position measurement in multiple degrees of freedom of motion, reduces the overall size requirement of the device, and ensures high sensitivity and flexible application adaptability.

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Abstract

The invention relates to a position measuring device for detecting the relative position of two objects, wherein the objects can be moved relative to each other in a translatory main direction of movement and in a further degree of freedom. A scale carrier extending longitudinally in the main direction of movement has a first, a second and a third surface, by which a plane is defined in each case and at least one measuring scale is arranged on each surface. A scanning structure assembly, which can be moved relative to the scale support, comprises a plurality of scanning units, which are designed to generate a movement-dependent position signal from a scan of the measurement scale, at least one scanning unit being assigned to each surface. A plane defined by the second surface divides the surrounding space into two half-spaces, wherein a first surface having at least one measuring scale is arranged in one of the half-spaces and a third surface having at least one measuring scale is arranged in the other half-space.
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