Linear Sensor Apparatus for Vehicle Position Detection
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Solution Overview
Problem
Existing linear sensors for vehicles face challenges in accurately measuring movement due to variations in output values based on input voltage and peripheral environments, particularly requiring mechanical offset compensation to prevent drag in systems like brake and steering components.
Innovation Solution
A linear sensor apparatus with a mobile member and magnet system that outputs distinct ON/OFF electrical signals based on the magnet's position, using a housing with a through hole and switch units to generate signals when the magnet moves between defined areas, allowing precise detection of driving system positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If general linear sensors convert magnetic force values into analog or digital values, then measurement capability is provided, but output values vary depending on input voltage or peripheral environment
Solution Approach 1:
The patent changes the output parameter from continuous analog values to discrete digital ON/OFF values. The sensor output transitions from varying continuously with magnetic field strength to outputting only two distinct states (ON when magnet is in second area, OFF when in first area), eliminating the problem of output variation due to voltage or environmental changes.
Solution Approach 2:
The patent segments the continuous measurement range into two distinct areas (first area and second area) separated by a reference line. This segmentation approach divides the continuous magnetic field variation into discrete zones, allowing the sensor to output stable digital values rather than continuous analog values that are sensitive to environmental changes.
2Reliability
If mechanical offset compensation is performed to prevent drag in brake and steering systems, then system performance is improved, but device complexity increases
Solution Approach 1:
The patent replaces mechanical offset compensation mechanisms with a magnetic field-based detection system. Instead of using mechanical components to physically compensate for offsets, the system uses a magnet attached to the moving component and a sensor that detects the magnet's position relative to a reference line, providing offset compensation through electromagnetic detection rather than mechanical adjustment.
Solution Approach 2:
The patent introduces a magnet as an intermediary element between the moving component and the sensor. This magnet serves as a mediator that carries positional information from the moving component to the sensor, enabling indirect detection of position and offset without requiring direct mechanical contact or complex mechanical compensation mechanisms.
3Measurement precision
If absolute position detection is implemented for steering angle, then straight driving is ensured, but sensor vulnerability to external forces increases
Solution Approach 1:
The patent uses a magnet as an intermediary that is attached to the steering component but does not directly contact the sensor. This intermediary approach allows the sensor to detect absolute position through magnetic field interaction without physical contact, eliminating vulnerability to external forces that could affect direct-contact sensors while maintaining accurate absolute position detection capability.
Solution Approach 2:
The patent replaces mechanical contact-based position detection with magnetic field-based detection. Instead of using mechanical sensors that physically contact and may be vulnerable to external forces, the system uses a non-contact magnetic field detection method where a magnet on the steering component interacts with a sensor to provide robust absolute position information immune to mechanical interference.
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 precise detection of driving degrees in vehicle systems, integrates multiple detection apparatuses, reduces manufacturing costs, and decreases failure rates by providing a simple and effective method for offset compensation.
Implementation Method 1
a magnet member provided in the mobile member, and an output unit which outputs an OFF value when the magnet member is located in the first area and outputs an ON value when the magnet member is located in the second area
Data Source
AI summary
A linear sensor apparatus for a vehicle includes a housing which includes an accommodation space therein, a mobile member which is provided in the accommodation space and has at least a part that extends from the housing outward to be connected to a predetermined driving system of the vehicle and linearly moves between a first area and a second area according to driving of the driving system, a magnet member provided in the mobile member, and an output unit which outputs an OFF value when the magnet member is located in the first area and outputs an ON value when the magnet member is located in the second area.