Dual Threshold Sensor for Aircraft Slat Movement Detection
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Solution Overview
Problem
Existing mechanical connections, such as aircraft slat panels, face challenges in detecting relative movement between adjacent components without unwanted displacement, as current solutions lack the ability to differentiate between varying degrees of movement and provide appropriate corrective actions.
Innovation Solution
A dual threshold sensor with two fuse portions, each designed to fracture at distinct amounts of relative movement, allowing for differentiated detection and signaling of movement thresholds, enabling nuanced control actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single threshold sensor is used to detect relative movement, then the device complexity is reduced, but the measurement precision is insufficient to differentiate between varying degrees of movement
Solution Approach 1:
The sensor is divided into two separate fuse portions (first and second fuse portions) with distinct fracture thresholds. Each fuse portion independently detects different levels of relative movement, allowing the system to differentiate between varying degrees of movement without requiring a single complex multi-functional component.
Solution Approach 2:
Each fuse portion is designed with locally differentiated properties - the first fuse portion has a first fracture threshold while the second fuse portion has a second fracture threshold. This local differentiation in fracture characteristics enables precise measurement of different movement magnitudes at specific locations within the sensor structure.
2Reliability
If a fuse fractures upon any relative movement, then the reliability of detecting unwanted movement is high, but the loss of information occurs because distinct corrective actions cannot be taken for different movement thresholds
Solution Approach 1:
The single fuse is segmented into two distinct fuse portions, each with its own fracture threshold. This segmentation preserves information about the magnitude of movement by having each portion respond to different threshold levels, enabling the control system to distinguish between minor and major deviations and apply appropriate corrective actions.
Solution Approach 2:
The fuse portions are designed with different fracture thresholds as varying parameters. The first fuse portion fractures at a first threshold level while the second fuse portion fractures at a second threshold level, creating a parameter-based information encoding system that communicates the severity of relative movement to the control mechanism.
3Strength
If complex mechanical connections are used to prevent relative movement, then the strength of the connection is improved, but the device complexity increases
Solution Approach 1:
The complex mechanical connection system is replaced with a simplified sensor-based detection system. Instead of using overly complex mechanical structures to prevent and detect movement, the invention uses a fuse-based sensor that provides reliable detection of relative movement with simpler construction, reducing mechanical complexity while maintaining connection integrity.
Data Source
AI summary
A sensor detects relative mechanical movement between two components. The sensor has two arms, and is to be mounted on one of the two components. Each of the arms has pins received in an opening in two fuse portions. The arms are pivotal within a fuse bracket. The two fuse portions include a thin portion to allow each to fracture. The fuse portions are designed to be distinct such that a distinct amount of relative movement between the first and second arms is allowed before each of the fuse portions fracture.