3D Hall Sensor Array for Accurate Position Detection
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Solution Overview
Problem
Conventional sensing systems for folding mobile terminals, which use a single Hall sensor to detect the opening or closing of the terminal, are prone to misjudgment due to their inability to accurately determine the relative position of a magnetic module, relying solely on the magnitude of the magnetic force and lacking sensitivity to the relative distance and position.
Innovation Solution
A sensing apparatus featuring a 3D structure of Hall sensors, with multiple sensors arranged on parallel planes and aligned in the Z-axis direction, allows for precise detection of magnetic forces and relative positions by comparing values from these sensors, enabling accurate determination of the attachment or detachment of a second body with a magnetic module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single Hall sensor is used to detect opening or closing of the terminal, then the device complexity is reduced, but the measurement precision of relative position and magnetic force magnitude deteriorates
Solution Approach 1:
The sensing system is segmented into multiple independent Hall sensors (first Hall sensor and second Hall sensor) positioned at different locations. Each sensor independently measures magnetic force magnitude, and the controller compares these segmented measurements to determine relative position and detect terminal state, thereby improving measurement precision without excessive complexity increase
Solution Approach 2:
The patent transitions from single-point sensing to multi-point spatial sensing by positioning Hall sensors at different locations (first and second positions) relative to the magnet. This dimensional expansion in space enables the system to detect not only magnetic force magnitude but also relative position information through comparative analysis of sensor outputs
2Device complexity
If only the magnitude of magnetic force is detected, then the sensing system remains simple, but the reliability of terminal state identification deteriorates due to misjudgment
Solution Approach 1:
The controller receives feedback from multiple Hall sensors and performs comparative analysis of their outputs. By evaluating the relationship between magnetic force magnitudes detected at different positions, the system generates more reliable terminal state identification, reducing misjudgment while maintaining reasonable system complexity
Solution Approach 2:
The system changes from detecting a single parameter (magnetic force magnitude) to detecting multiple parameters (magnetic force magnitude at multiple positions). This parameter expansion enables more reliable terminal state detection by providing additional information dimensions for judgment
3Device complexity
If a single Hall sensor is used, then the device structure is simple, but the sensitivity to relative distance and position deteriorates
Solution Approach 1:
The sensing function is segmented across multiple Hall sensors positioned at different locations. This segmentation enables the system to detect changes in relative distance and position with higher sensitivity by comparing the differential responses of sensors at different positions to magnetic field variations
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
This configuration enhances the sensitivity and accuracy of detecting the opening or closing of the terminal, reducing misjudgment by providing detailed relative position data, thereby improving the reliability of the sensing system.
Implementation Method 1
a sensor unit where a plurality of Hall sensors are arranged in a 3 dimensional structure... capable of identifying a relative position of a body which comprises an additional magnetic module by using sensing data
Data Source
AI summary
A sensing apparatus and sensing device using the sensing apparatus are capable of identifying a relative position of a body which includes a magnetic module by using sensing data of a sensor unit which may be arranged in a 3 dimensional structure.