Orientation Determination Using Triaxial Sensor Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for determining the orientation of a solid in movement are cumbersome, require numerous calculations, and are sensitive to specific accelerations, making them difficult to embed in small-sized portable devices.
Innovation Solution
A system comprising triaxial sensors and correction means to calculate a rotation matrix, which includes orthogonalization, centering, and automatic activation/deactivation of correction mechanisms to minimize calculations and energy consumption, allowing for efficient determination of attitude angles using a reduced number of calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a device for capturing orientation uses numerous calculations to establish orientation from sensor measurement data, then measurement precision is improved, but device complexity increases and embedded implementation becomes difficult
Solution Approach 1:
The patent extracts and eliminates unnecessary calculation steps from the orientation determination process. By using a simplified mathematical model that directly relates sensor measurements to orientation parameters, the invention removes complex iterative calculations while maintaining measurement precision, enabling embedded implementation in portable devices
Solution Approach 2:
The invention changes the mathematical parameters and equations used for orientation calculation. Instead of using complex nonlinear optimization algorithms, the patent employs linear algebraic equations that directly compute orientation from accelerometer and magnetometer data, significantly reducing computational complexity while preserving accuracy
2Volume of moving object
If a system for determining solid orientation is made compact for portable devices, then device size is reduced, but computational resources and energy availability are limited
Solution Approach 1:
The patent removes computationally intensive calculation steps from the system, extracting only the essential mathematical operations needed for orientation determination. This reduction in computational requirements directly lowers energy consumption, making the system suitable for compact portable devices with limited power resources
Solution Approach 2:
The invention enables the system to perform orientation calculations using minimal computational resources inherently available in portable devices. By designing an algorithm that requires only basic arithmetic operations rather than complex matrix decompositions, the system serves itself with the limited processing capabilities of embedded processors
3Measurement precision
If correction means are continuously activated to correct sensor measurements, then measurement precision is improved, but use of energy and computational load increase
Solution Approach 1:
The patent implements periodic rather than continuous correction of sensor measurements. The correction means are activated only at specific intervals or under specific conditions (such as when significant deviation is detected), reducing energy consumption and computational load while maintaining measurement precision through targeted correction events
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 the development of a compact, low-energy-consuming system capable of accurately determining the orientation of a solid in movement with reduced computational complexity, facilitating its implementation in portable devices.
Implementation Method 1
a first triaxial sensor and a second triaxial sensor integral to said solid for measuring the components of said respective vector fields along the axes of said sensors
Implementation Method 2
said fields being of known directions in a fixed coordinate system not linked to the solid
Data Source
AI summary
A system determines parameters representing the orientation of a solid in movement within a first vector field and a second vector field. A first triaxial sensor and a second triaxial sensor are connected to the solid and measure the components of the respective vector fields along the axes of the sensors, obtaining corresponding first and second vectors. A processor determines the rotation matrix of the solid, using a correction module for delivering a first corrected vector, and calculating a third vector which is not coplanar to the plane formed by the first corrected vector and the second vector, such that the angles of the axis system formed by the third vector and the first corrected vector and the second vector remain constant.