Inductive Position Scale With Nested Graduations
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Solution Overview
Problem
Existing inductive position-measuring devices are not sufficiently stable and are sensitive to environmental influences, which affects their accuracy and reliability.
Innovation Solution
A scale for inductive position measurement featuring a support channel with interconnected side walls and tongue-shaped graduation elements, designed to be manufactured from electrically conductive materials using deformation processing, which forms a stable and insensitive structure for inductive scanning, utilizing the vernier principle for absolute position measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing inductive position-measuring devices are used, then position measurement function is provided, but stability and resistance to environmental influences are insufficient
Solution Approach 1:
The scale is divided into two separate graduated sides (first and second graduations) positioned on opposite walls of the support channel. This segmentation allows independent optimization of each graduation and provides redundancy, improving measurement reliability and resistance to environmental disturbances.
Solution Approach 2:
The graduated elements are nested within the support channel structure, with first graduations on one wall and second graduations on the opposite wall. This nested configuration protects the measurement elements from external environmental influences while maintaining inductive scanning capability.
2Reliability
If a stable and environmentally insensitive structure is achieved, then measurement reliability improves, but device complexity increases
Solution Approach 1:
The support channel combining both first and second graduations in a single integrated structure reduces overall device complexity. The channel walls serve dual purposes as both structural support and mounting surfaces for the graduated elements, eliminating the need for separate components.
Solution Approach 2:
The support channel serves multiple functions: providing structural support, housing the graduated elements, and defining the interstitial space for the scanner. This multi-functionality reduces the number of separate components needed, simplifying the overall device structure while maintaining environmental insensitivity.
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
The solution provides a stable and environmentally insensitive inductive position-measuring device capable of accurate absolute position measurement, resistant to interference and vibrations, suitable for use in transport systems and automation technology.
Implementation Method 1
An excitation current impressed on the excitation winding generates a time-changing electromagnetic excitation field, which is influenced as a function of position by the array of graduation elements, and, as a result, a position-dependent scanning signal is induced in the associated scanning winding.
Implementation Method 2
the graduation is scanned by a scanning unit, which has at least one excitation winding and one scanning winding. An excitation current impressed on the excitation winding generates a time-changing electromagnetic excitation field, which is influenced as a function of position by the array of graduation elements
Data Source
AI summary
A scale for inductive position measurement along a measurement direction X includes a support channel made of electrically conductive material having two interconnected spaced-apart side walls extending parallel to the measurement direction X and enclosing an interstitial space therebetween. A succession of first graduations made of electrically conductive material are disposed on the support channel, located in the interstitial space opposite and spaced from one of the two side walls and extending parallel to the measurement direction X. A succession of second graduations made of electrically conductive material are disposed on the support channel, located in the interstitial space opposite and spaced from the other one of the two side walls and extending parallel to the measurement direction X. The succession of first graduations and the succession of second graduations form a gap configured to receive a scanner operable to inductively scan the first graduations and the second graduations.