Writing Instrument Position Detection with Sensor Fusion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional writing instruments configured to be tracked and positioned in a 2D or 3D space lack sufficient accuracy, which is a limitation in augmented reality applications and digital writing.
Innovation Solution
A writing instrument equipped with a position detection device comprising a tip pressure sensor, an inertial measurement unit, and a network of radio antennas, which uses sensor fusion to accurately determine and track the position of the instrument in a 2D or 3D space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional tracking methods are used for writing instruments, then the device complexity remains low, but the measurement precision is insufficient
Solution Approach 1:
The patent combines multiple sensing systems (radio antenna network for location, inertial measurement unit for motion, tip pressure sensor for contact detection) into an integrated position detection device. This merging of previously separate tracking methods enables millimeter-level positioning accuracy while managing system complexity through unified sensor fusion processing.
Solution Approach 2:
The patent introduces sensor fusion as an intermediary processing layer that integrates data from multiple sensors (radio location data, inertial measurement data, pressure sensor data). This intermediary system reconciles the outputs of different sensing modalities to achieve high-precision positioning without requiring any single sensor system to be overly complex.
2Measurement precision
If multiple sensors are integrated for accurate tracking, then the measurement precision improves, but the use of energy increases
Solution Approach 1:
The patent implements periodic sampling of sensor data rather than continuous monitoring. The position detection device periodically updates location information from the radio antenna network, inertial measurements, and pressure sensor readings. This periodic operation maintains millimeter-level tracking accuracy while significantly reducing power consumption compared to continuous sensing.
Solution Approach 2:
The patent employs partial action by selectively activating different sensor subsystems based on operational needs. For example, the tip pressure sensor is activated only during writing operations, and the radio antenna network provides location updates at optimized intervals. This partial utilization of sensing capabilities achieves sufficient tracking accuracy while minimizing overall energy consumption.
3Measurement precision
If sensor fusion is implemented for position determination, then the measurement precision is enhanced, but the device complexity increases
Solution Approach 1:
The patent introduces sensor fusion as an intermediary processing layer that integrates data from multiple sensors (radio location data, inertial measurement data, pressure sensor data). This intermediary system reconciles the outputs of different sensing modalities to achieve high-precision positioning without requiring any single sensor system to be overly complex.
Solution Approach 2:
The patent implements feedback mechanisms where the sensor fusion system continuously monitors and adjusts the weighting of different sensor inputs based on their reliability and current operational context. This feedback-driven sensor fusion optimizes position determination accuracy while managing processing complexity through adaptive rather than static integration algorithms.
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 achieves accurate millimeter-level tracking and positioning of the writing instrument, enhancing its usability in augmented reality and digital writing applications.
Implementation Method 1
The network of radio antennas provides radio antenna data of the writing instrument, the radio antenna data being used for radio location of the body
Implementation Method 2
The position detection device comprises a tip pressure sensor, an inertial measurement unit
Implementation Method 3
The position detection device comprises a tip pressure sensor
Data Source
AI summary
A writing instrument comprising a body, the body being provided with a writing tip and a position detection device, the position detection device being configured to provide data for determining a position of the body in a space, the position detection device comprising a tip pressure sensor, an inertial measurement unit, and a network of radio antennas.