Slider Window Sensor Using Hall Effect Magnet
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Solution Overview
Problem
Conventional slider window assemblies for vehicles lack an effective non-contact and non-mechanical means to determine if the rear slider window is fully closed, relying on mechanical switches that can be unreliable.
Innovation Solution
A sensing system using a non-contact magneto-responsive sensor, such as a Hall Effect sensor, is integrated into the rear slider window assembly to detect the proximity of a magnetic element on the movable window panel, providing a compact and reliable method to determine when the window is fully closed, and activating an indicator for the driver accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical switch is used to detect window position, then the detection function is achieved, but the reliability is reduced due to mechanical wear and failure
Solution Approach 1:
The patent replaces the mechanical switch with a Hall effect sensor that detects the position of a magnet attached to the window panel. This non-contact sensing method eliminates mechanical wear and failure modes while providing reliable detection of the window's closed position, directly resolving the contradiction between reliability and mechanical complexity.
2Reliability
If a non-contact sensor is used to detect window position, then the reliability is improved, but the device complexity increases due to additional sensor components
Solution Approach 1:
The patent introduces a magnet as an intermediary element that works with the Hall effect sensor to detect window position. The magnet is simply attached to the window panel without requiring complex mechanical linkages or modifications to the sensor mounting, thus achieving reliable non-contact detection while minimizing the increase in device complexity.
3Measurement precision
If a mechanical switch is used, then the device complexity is lower, but the measurement precision is reduced due to contact wear and positioning errors
Solution Approach 1:
The Hall effect sensor provides precise measurement of the window panel's position by detecting the magnetic field strength, which varies with distance. This non-contact method eliminates the positioning errors and wear associated with mechanical switches, achieving high measurement precision without requiring complex mechanical adjustment mechanisms.
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
The system ensures accurate detection of the window's closed position without mechanical contact, enhancing reliability and providing a clear visual or audible indication to the driver, thus improving user experience and safety.
Implementation Method 1
A sensing system using a non-contact magneto-responsive sensor, such as a Hall Effect sensor, is integrated into the rear slider window assembly to detect the proximity of a magnetic element on the movable window panel
Data Source
AI summary
A slider window assembly for a vehicle includes (i) a frame portion having upper and lower rails, (ii) at least one fixed window panel at least partially defining an opening, and (iii) a movable window panel that is movable along the upper and lower rails between a closed position and an opened position. A sensing system is operable to determine when the movable window panel is in the closed position and when the movable window panel is not in the closed position. The sensing system includes a magneto-responsive sensor connected to the frame portion and a magnetic element connected to the movable window panel. When the movable window panel is in the closed position, the sensor detects the the magnetic element. When the sensing system determines that the movable window panel is not in the closed position, an indicator is activated to alert the vehicle driver that the movable window panel is not closed.