Rotation Angle Detector Foreign Substance Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rotation angle detectors fail to quickly detect abnormalities, such as foreign substance entry, leading to delayed identification of causes and potential for repeated failures after repair, due to difficulties in identifying the root cause of failures like broken cables or foreign substances.
Innovation Solution
A rotation angle detector with a rotating body featuring multiple track parts and detection units that generate signals, an abnormality detecting unit calculating fluctuation ranges and judging abnormalities based on differences between these ranges, and a phase detecting unit to identify when these differences exceed a predetermined threshold, allowing for early detection of issues like foreign substance adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional abnormality detection methods (threshold-based signal amplitude monitoring) are used, then device complexity is kept low, but measurement precision and early detection capability are insufficient
Solution Approach 1:
The patent changes the detection parameter from simple signal amplitude threshold monitoring to fluctuation range analysis. By calculating the fluctuation range (difference between maximum and minimum values) of signals from multiple track parts and comparing their differences, the system achieves more precise abnormality detection. This parameter transformation enables early detection of foreign substance entry while maintaining reasonable system complexity.
2Productivity
If repair parts are stored beforehand, then productivity is improved by reducing downtime, but loss of substance increases due to storage requirements
Solution Approach 1:
The patent implements preliminary action by detecting abnormalities in early stages before they develop into complete failures. The fluctuation range comparison method identifies foreign substance entry (liquid or solid) early, allowing maintenance to be performed before critical components are damaged. This prevents the need for extensive parts storage while maintaining high productivity through timely maintenance.
3Loss of time
If conventional failure detection is used, then device complexity remains low, but loss of time increases due to delayed cause identification
Solution Approach 1:
The patent applies segmentation by dividing the detection approach into distinct signal processing steps: obtaining signals from multiple track parts, calculating individual fluctuation ranges, comparing the differences between fluctuation ranges, and determining abnormalities. This segmented approach to foreign substance detection (distinguishing between liquid and solid based on detection patterns) enables rapid cause identification while keeping the detection mechanism manageable in complexity.
Data Source
AI summary
A rotation angle detector comprises a rotating body including a plurality of track parts, and an abnormality detecting unit for detecting an abnormality based on signals generated in detection units. The detection units generate a first signal based on a first track part and a second signal based on a second track part. The abnormality detecting unit includes a judgement unit for judging an occurrence of an abnormality when the difference between the fluctuation range of the first signal and the fluctuation range of the second signal is larger than a predetermined fluctuation range judgement value.