Magnetic Sensor Array for 6D Near-Surface Object Tracking
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Solution Overview
Problem
Conventional near-surface object sensing technologies face limitations due to occlusion, heavy and power-dependent equipment, and difficulty in recognizing three-dimensional motions, restricting intuitive and portable interactions.
Innovation Solution
A near-surface object sensing device with a printed circuit board equipped with magnetic sensors, a multiplexer, and a microprocessor that converts magnetic sensing signals into six-dimensional coordinates, enabling accurate detection of external magnetic objects' positions and orientations without additional power sources, and providing a compact, occlusion-free interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If low frequency electromagnetic sensing technology is used to avoid occlusion interference, then sensing capability is improved, but portability deteriorates due to heavy power supply and transmitter requirements
Solution Approach 1:
The patent replaces traditional electromagnetic sensing systems with heavy transmitters and power supplies by using a magnetic field-based sensing system with arrayed magnetic sensors. The magnetic sensors detect magnetic field distributions directly without requiring heavy electromagnetic transmission equipment, thereby maintaining sensing capability while dramatically improving portability.
Solution Approach 2:
The patent divides the sensing system into multiple discrete magnetic sensors arranged in an array on a printed circuit board. Each sensor independently detects magnetic field components, and the collective data from all sensors provides comprehensive six-dimensional coordinate information. This segmentation allows the system to achieve high sensing capability through distributed sensing rather than relying on a single heavy transmitter.
2Area of stationary object
If conventional electromagnetic sensing technology is used, then sensing range is extended, but ability to recognize three-dimensional motions deteriorates
Solution Approach 1:
The patent transitions from traditional two-dimensional sensor arrays to three-dimensional magnetic field sensing by measuring magnetic field distributions in multiple spatial dimensions. The magnetic sensors detect magnetic field vectors with both magnitude and direction information, enabling the system to calculate six-dimensional coordinates (x, y, z positions plus roll, pitch, yaw orientations) and accurately recognize three-dimensional motions including tilting, hovering, and rolling.
3Ease of operation
If two-dimensional surface touch technology is used, then interface simplicity is improved, but interaction dimensionality deteriorates
Solution Approach 1:
The patent extends traditional two-dimensional touch interfaces into three-dimensional space by using magnetic field sensing to detect object positions and orientations in the near-surface region. The system provides six-dimensional coordinate information (three positional coordinates plus three orientational angles), enabling users to perform intuitive three-dimensional manipulation such as hovering, tilting, and rolling gestures above the surface, thereby maintaining interface simplicity while dramatically increasing interaction dimensionality.
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 solution allows for accurate three-dimensional position tracking and orientation sensing of external objects, offering a lightweight, portable, and intuitive user interface with enhanced interaction capabilities.
Implementation Method 1
a plurality of magnetic sensors arrayed on the printed circuit board to sense the magnetic field of an external magnetic object and generate a plurality of magnetic sensing signals
Data Source
AI summary
Disclosed is a near-surface object sensing device, including a printed circuit board, a plurality of magnetic sensors arrayed on the printed circuit board to sense the magnetic field of an external magnetic object and generate a magnetic sensing signal, a multiplexer connected to the magnetic sensors for selecting and outputting the magnetic sensing signal, and a microprocessor connected to the multiplexer for receiving the magnetic sensing signal, wherein the microprocessor includes a sampling algorithm module for converting the magnetic sensing signal into a magnetic field distribution image, and a six-dimensional coordinate-calculating module for calculating six-dimensional coordinates of the external magnetic object. The sensing device of the invention is compact, low energy consuming and can accurately provide users with a convenient and intuitive user interface with three dimensional locations and position information in a near-surface space.