Magnetic Sensor for Rotation Detection in Convertible PC Hinges
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Solution Overview
Problem
Existing sensors fail to precisely detect rotation in mechanisms like convertible PC hinges and robot joints, lacking convenience and accuracy.
Innovation Solution
A magnetic sensor with a base material and strategically placed magnets and magnetic detection parts, utilizing TMR or GMR elements to output signals based on magnetic field changes, allowing for precise detection of rotation and deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional magnetic sensors are used to detect rotation in convertible PC hinges and robot joints, then basic detection function is provided, but measurement precision and reliability are insufficient
Solution Approach 1:
The magnetic sensor is divided into multiple independent magnetic detection parts (first, second, third detection parts) arranged at different positions and orientations. Each detection part independently detects magnetic field changes from magnets, and the control unit integrates signals from all parts to calculate rotation angle, thereby improving both measurement precision and reliability through redundant detection paths
Solution Approach 2:
Multiple magnets (first, second, third magnets) are arranged in a nested configuration where each magnet group contributes to detecting different rotational components. The magnets are positioned at specific intervals and orientations within the same spatial region, allowing simultaneous detection of multiple rotational parameters without increasing overall sensor footprint
Solution Approach 3:
The invention transitions from single-axis detection to multi-dimensional detection by arranging magnetic detection parts in different spatial orientations (first direction, second direction, third direction). This enables detection of rotation about multiple axes simultaneously, significantly improving measurement precision for complex rotational movements in hinges and robot joints
2Measurement precision
If additional magnets and sensors are added to improve detection accuracy, then measurement precision improves, but device complexity increases
Solution Approach 1:
Multiple magnetic detection parts and magnet groups are merged into a single integrated magnetic sensor assembly. The control unit consolidates signals from all detection parts and integrates magnetic field data from multiple magnets to calculate rotation angle, reducing the need for separate sensor systems and lowering overall device complexity while maintaining high measurement precision
Solution Approach 2:
The magnetic sensor is designed with universal applicability for different rotation detection scenarios. The same sensor configuration with multiple detection parts and magnet groups can detect rotation about multiple axes and adapt to different mechanical structures (hinges, robot joints), eliminating the need for specialized sensors for each application and reducing system complexity
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 rotation and deformation, enhancing convenience and accuracy in applications such as convertible PCs and industrial robots, without the need for additional magnets or sensors.
Implementation Method 1
Each of the plurality of magnetic detection parts outputs a signal in accordance with change in the magnetic field accompanying deformation of the base material
Implementation Method 2
utilizing TMR or GMR elements to output signals based on magnetic field changes
Implementation Method 3
utilizing TMR or GMR elements to output signals based on magnetic field changes
Data Source
AI summary
A magnetic sensor includes a base material, a plurality of magnets provided at predetermined spacing on the base material, and a plurality of magnetic detection parts respectively provided close to the plurality of magnets. Each of the plurality of magnetic detection parts outputs a signal in accordance with change in the magnetic field accompanying deformation of the base material.