RF Remote Monitoring via Speckle Pattern Analysis
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Solution Overview
Problem
Conventional biomedical and mechanical parameter monitoring techniques require direct contact and line of sight, limiting their ability to monitor parameters from a distance or through obstructions, and lack sensitivity for detecting small movements.
Innovation Solution
A remote monitoring system using RF or microwave electromagnetic radiation to detect speckle patterns formed by reflections from objects, allowing for non-optical, non-contact monitoring of biomedical and mechanical parameters, including heart rate and breathing rate, through walls or obstructions, by processing variations in RF signals with antenna elements and a control system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical techniques are used for monitoring biomedical parameters, then measurement precision can be achieved, but direct line of sight and contact are required which limits monitoring from distance or through obstructions
Solution Approach 1:
The patent changes the fundamental parameter of electromagnetic radiation wavelength from optical range to RF/microwave range. This allows the radiation to penetrate walls and obstructions that block optical radiation, enabling remote monitoring without direct line of sight while maintaining measurement capability through detection of RF speckle patterns caused by physiological movements
Solution Approach 2:
The patent replaces the optical measurement system with an RF-based measurement system. Instead of using optical wavelengths that require line of sight, the system uses RF radiation that can penetrate obstacles, substituting the physical constraint of optical paths with electromagnetic wave propagation through different media
2Reliability
If conventional contact-based monitoring techniques are used, then reliable parameter detection is achieved, but the system requires direct contact with the user which reduces adaptability to remote monitoring scenarios
Solution Approach 1:
The RF monitoring system provides universal applicability across multiple monitoring scenarios. The same system can monitor parameters both through walls and in open spaces, replace contact-based methods, and work in scenarios where optical methods fail, making the system adaptable to diverse applications including remote patient monitoring, athletic performance tracking, and security applications
3Ease of operation
If optical radiation is used for monitoring, then line of sight monitoring is possible, but monitoring through walls or obstructions is blocked
Solution Approach 1:
The patent changes the electromagnetic radiation parameter from optical wavelength to RF/microwave wavelength. RF radiation has the physical property of penetrating non-conductive materials like walls, whereas optical radiation is blocked by such materials. This parameter change eliminates the harmful effect of wall blocking while maintaining the ability to detect physiological movements through RF speckle pattern analysis
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 accurate monitoring of biomedical and mechanical parameters from a distance, including through walls, with increased sensitivity for detecting small movements, such as those associated with talking voices, by analyzing spatio-temporal variations in RF speckle patterns, effectively overcoming the limitations of conventional optical techniques.
Implementation Method 1
RF transmission unit (120) comprising an arrangement of one or more transmission antenna elements configured for directing RF radiation toward an inspection zone and RF collection unit (140) comprising one or more collection antenna elements configured for receiving returned radiation from one or more objects in said inspection zone
Implementation Method 2
The input data is associated with sampling of speckles formed in radiation returning by reflection and scattering from one or more objects
Implementation Method 3
speckles formed in radiation returning by reflection and scattering from one or more objects
Implementation Method 4
sensitivity of detection or monitoring using the present technique may be increased if the one or more objects include or carrying metallic elements. Typically, metals and metallic elements have high reflection properties to RF radiation
Data Source
AI summary
A system and corresponding method are described. The system comprises an RF transmission unit comprising an arrangement of one or more transmission antenna elements configured for transmitting radiation in one or more elected frequency ranges toward an inspection region; RF collection unit comprising one or more collection antenna elements configured for receiving radiation in said one or more frequency ranges from at least a portion of said inspection region; and a control system. The control system is configured for receiving and processing data on collected RF signals from the RF collection unit for determining one or more parameters on a at least one object located in said inspection region.