Stroke Sensor Assembly With Angled Magnet Travel for Long-Range Detection
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Solution Overview
Problem
Existing stroke sensors face performance degradation when detecting the position of a moving object with a large range of movement due to insufficient magnetic field intensity, leading to increased magnet size or cost when trying to enhance the magnetic field.
Innovation Solution
A stroke sensor design that converts the first relative movement of a moving object along a first linear path to a second relative movement of magnetic field generators along a second linear path at an angle, using a support member to guide the magnetic field generators, thereby maintaining magnetic field intensity without increasing their size or cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnets are used to generate magnetic field for stroke sensor, then position detection function is achieved, but magnetic field intensity becomes insufficient when moving object has large range of movement
Solution Approach 1:
The patent converts the linear movement of the moving object along the first linear path into relative movement of the magnetic field generator along a second linear path that extends at an angle different from the first linear path. This dimensional transformation allows the magnetic field generator to maintain sufficient magnetic field intensity across the larger detection range without requiring larger or more expensive magnets.
2Reliability
If magnet size is increased to enhance magnetic field intensity, then detection performance improves, but device cost increases
Solution Approach 1:
Instead of increasing magnet size or cost to improve detection performance, the patent employs a support member that converts the movement path, allowing the magnetic field generator to traverse an angled second linear path. This approach maintains adequate magnetic field intensity throughout the detection range while using standard-sized, cost-effective magnets.
3Device complexity
If magnetic field generator moves along same linear path as moving object, then detection is simplified, but magnetic field intensity becomes insufficient for large movement ranges
Solution Approach 1:
The patent introduces a support member that converts the movement of the moving object along a first linear path into movement of the magnetic field generator along a second linear path extending at an angle. This conversion maintains sufficient magnetic field intensity across the detection range without significantly complicating the overall detection system.
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
Ensures accurate position detection of a moving object with a large range of movement at limited cost by optimizing the magnetic field generators' movement path, enhancing detection performance while controlling costs.
Implementation Method 1
a magnetic field generator; a support member that supports the magnetic field generator; and a magnetic field detecting element that detects a magnetic field that is generated by the magnetic field generator
Data Source
AI summary
A stroke sensor for detecting a position of a moving object that linearly moves has: a magnetic field generator; a support member that supports the magnetic field generator; and a magnetic field detecting element that detects a magnetic field that is generated by the magnetic field generator. The support member converts a first relative movement of the moving object relative to the magnetic field detecting element to a second relative movement of the magnetic field generator relative to the magnetic field detecting element. The first relative movement is made along a first linear path, the second relative movement is made along a second linear path, and the second linear path extends at an angle different from the first linear path.