Bearingless Angle Measurement With Axial Compensation Coupling
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Solution Overview
Problem
Bearingless angular measurement devices face challenges in accurately determining the scanning distance and maintaining a precise mechanical connection between rotating components without integral bearings, which can lead to installation and alignment issues.
Innovation Solution
A bearingless angular measurement device is designed with a scanning unit and angle scale at a scanning distance, featuring a compensation coupling that is elastically deformable along the axis, allowing for precise determination of the scanning distance and maintaining a torsionally fixed connection to machine components, while generating angle-dependent output signals for evaluation electronics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If bearingless angular measurement device is used, then device complexity is reduced, but measurement precision deteriorates due to installation and alignment issues
Solution Approach 1:
The patent applies parameter changes by making the compensation coupling elastically deformable in the axial direction while maintaining torsional stiffness. This allows the coupling to adapt axially to scanning distance variations while preserving the torsional connection needed for accurate angular measurement, thus resolving the contradiction between reduced device complexity and maintained measurement precision
Solution Approach 2:
The compensation coupling acts as an intermediary element between the stationary housing and the rotating component group. It mediates the connection by providing elastic deformability in the axial direction to accommodate installation tolerances while maintaining torsional stiffness for precise angular measurement, thereby enabling bearingless design without sacrificing measurement accuracy
2Adaptability or versatility
If compensation coupling is made elastically deformable in axial direction, then adaptability is improved, but rigidity deteriorates
Solution Approach 1:
The compensation coupling exhibits local quality by having different mechanical properties in different directions: it is elastically deformable in the axial direction to provide adaptability, while maintaining high torsional stiffness to provide rigidity for angular measurement. This directional differentiation of mechanical properties resolves the contradiction between adaptability and rigidity
3Measurement precision
If scanning distance is precisely determined, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system determines the scanning distance automatically by evaluating the output signals from the inductive angle-measuring device itself. The evaluation electronics process the angle-dependent output signals to calculate the scanning distance, enabling self-service measurement without requiring separate position-measuring devices, thus improving measurement precision while avoiding additional device complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enables precise determination of the scanning distance and mechanical connection, allowing for accurate measurement of angular position and inclination, and detecting brake wear and engagement state without separate position-measuring devices, ensuring reliable operation and extended service life.
Implementation Method 1
the compensation coupling (2.1) is elastically deformable in the direction of the axis
Implementation Method 2
inductive angle-measuring devices, excitation coils and receiver coils in the form of circuit traces are frequently applied on a shared circuit board as a scanning unit
Data Source
AI summary
A bearingless angular measurement device includes an angle scale, a scanning unit, and an evaluation electronics. The scanning unit and the angle scale are located at a scanning distance relative to each other and are rotatable about an axis, so that the scanning unit is capable of generating angle-dependent output signals, which may be further processed in the evaluation electronics. The scanning distance is able to be determined on the basis of the output signals. In addition, the angular measurement device includes a compensation coupling that is attachable to a machine component and is elastically deformable in the direction of the axis.