Angle Measurement Device With Segmented Irregular Elements
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing angle measuring devices for internal combustion engines lose speed information at irregular positions, limiting continuous speed measurement across the entire circumference.
Innovation Solution
Incorporating an irregular element with double the extension of regular elements, allowing for continuous speed measurement by analyzing signals across the same interval, with a gear wheel design featuring teeth and gaps that include a mid-portion plateau for improved signal detection and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an irregular element is introduced to provide position reference, then position reference is improved, but speed information is lost at irregular positions
Solution Approach 1:
The irregular element is segmented into two separate regular elements spaced at a specific interval (e.g., 60° or 120° apart). Each element generates its own signal, allowing the system to maintain continuous speed measurement capability while still providing position reference through the specific spacing pattern between the two elements.
Solution Approach 2:
Instead of using a single irregular element that creates information loss, the solution transitions to a two-dimensional arrangement of regular elements with specific angular spacing. This spatial dimensionality allows the system to encode position information through the relative timing and spacing of signals from multiple elements, rather than relying on a single irregular feature.
2Productivity
If regular elements are used throughout, then continuous speed measurement is achieved, but position reference capability is lost
Solution Approach 1:
While maintaining regular elements throughout for continuous speed measurement, the solution introduces a specific local configuration at predetermined positions where elements are spaced at reference intervals (60° or 120°). This local variation in spacing provides position reference capability without disrupting the overall regular pattern needed for continuous speed measurement.
Solution Approach 2:
The regular elements serve dual functions: they provide continuous speed measurement through their uniform spacing while simultaneously enabling position reference through their specific angular arrangement. The same elements that measure speed also encode position information through their geometric configuration, eliminating the need for separate irregular elements.
3Measurement precision
If irregular element with double extension is used, then position reference is improved, but device complexity increases
Solution Approach 1:
Instead of changing the geometric form (double extension), the solution changes the parameter of angular spacing between elements. Regular elements are positioned at specific intervals (60° or 120°) to provide position reference, maintaining simple geometry while achieving the reference function through parameter variation rather than form variation.
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
Enables continuous speed measurement across the entire circumference without losing information, using a simple sensor and robust gear wheel design resistant to external influences.
Implementation Method 1
In the case of an electromagnetic measuring method, the gear wheel forms a passive encoder which is registered by a passively or actively designed sensor. A passive sensor may use an inductive measurement principle
Implementation Method 2
The acquisition of the teeth and the gaps can be determined by means of an optical measuring method or an electromagnetic measuring method
Implementation Method 3
an active sensor may be formed by a Hall sensor arrangement
Data Source
AI summary
An angle measuring device comprising a rotating device which includes a signal-generating regular element, at least one signal-generating irregular element, and at least one sensor for acquiring the signals. The irregular element has a double extension compared to the regular element.