Scanning Polarized RF Reference System for Munitions Orientation
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Solution Overview
Problem
Current angular orientation sensors for mobile platforms, such as munitions and UAVs, face limitations including noise, drift errors, high power requirements, and difficulty in measuring full spatial orientation, especially in non-line-of-sight conditions and harsh environments, with existing technologies like inertial, optical, and RF-based systems.
Innovation Solution
The use of scanning polarized RF reference sources to establish a reference coordinate system, enabling precise angular orientation measurements through peak detection and nonlinear signal processing, and allowing operation in both line-of-sight and non-line-of-sight settings with reduced noise and environmental interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If inertial sensors (accelerometers and gyros) are used for angular orientation measurement, then position and orientation information can be provided, but noise and drift error accumulation increase over time
Solution Approach 1:
The patent introduces polarized RF reference sources as an intermediary reference system that inertial sensors can periodically reference against. This mediator allows the system to correct drift errors by comparing sensor readings against the stable external RF reference, thereby maintaining measurement precision without continuous error accumulation.
Solution Approach 2:
The system implements feedback by continuously monitoring the output of inertial sensors and comparing it against the polarized RF reference sources. When drift or error is detected, the system uses the RF reference as a correction source, feeding back adjusted values to maintain accurate angular orientation measurements over extended periods.
2Measurement precision
If optical sensors are used for angular orientation measurement, then direct measurement of position and orientation can be achieved, but operation is limited to line-of-sight conditions
Solution Approach 1:
The patent employs polarized RF reference sources that can serve multiple functions: they provide reference signals for angular orientation measurement, enable operation in both line-of-sight and non-line-of-sight conditions, and work across various environmental conditions. This universal reference system replaces the need for separate optical and other sensing systems.
3Adaptability or versatility
If traditional RF-based sensors are used for angular orientation measurement, then operation in non-line-of-sight conditions is possible, but measurement precision is reduced due to noise and environmental interference
Solution Approach 1:
The patent applies local quality by using polarized RF reference sources with specific polarization characteristics that create distinct, localized signal patterns. This allows the system to distinguish the reference signal from background noise and environmental interference, maintaining high measurement precision even in non-line-of-sight conditions where the signal must penetrate obstacles or travel through challenging environments.
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 approach significantly enhances the precision and accuracy of angular orientation measurements, reduces the need for accurate signal magnitude calibration, and allows for autonomous, low-power operation, making it suitable for guidance and control of mobile platforms in challenging environments.
Implementation Method 1
scanning polarized RF reference sources
Implementation Method 2
polarized RF reference sources
Data Source
AI summary
Arbitrarily deploying scanning polarized RF reference sources and using them to establish a full position and angular orientation reference coordinate system or a full angular orientation reference coordinate system that objects property equipped with polarized RF sensors could use to determine their angular position and/or orientation relative to the reference coordinate system.