Wireless Network Presence Detection Without Fiducial Tags
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Solution Overview
Problem
Existing object tracking technologies, such as GPS and radar, are ineffective indoors and vulnerable to interference, and require a fiducial element or transceiver, which may not be present or active in certain applications.
Innovation Solution
A method using wireless communication networks to detect the presence of a human by analyzing signal properties, creating baseline profiles, and comparing them to real-time data to determine the presence or absence of a human without requiring a fiducial element, utilizing signal absorption and scattering characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GPS or radar is used for object tracking, then tracking capability is provided, but the system becomes ineffective indoors and vulnerable to interference
Solution Approach 1:
The patent replaces traditional mechanical/electromagnetic tracking systems (GPS satellites, radar beams) with a wireless communication network-based detection system. The system uses existing WiFi or similar wireless networks to detect human presence by analyzing signal properties, eliminating the need for satellite signals or active radar transmission.
Solution Approach 2:
The system utilizes the wireless communication network's own signals for detection purposes. The baseline signal profile is created from normal network communications, and human presence is detected by analyzing deviations in these self-generated signals, eliminating the need for separate dedicated tracking infrastructure.
2Loss of information
If a transceiver is attached to the object for tracking, then location data can be obtained, but the object must have a fiducial element which may not be present or active
Solution Approach 1:
The system serves multiple functions using the same wireless network infrastructure. It provides both normal wireless communication and human presence detection simultaneously, making it applicable to environments where objects may or may not have transceivers attached.
Solution Approach 2:
The wireless communication network acts as an intermediary between the tracking system and the object. Instead of requiring a direct connection between the tracker and the object via a transceiver, the network mediates the detection process by analyzing signal interactions caused by the object's presence.
3Measurement precision
If radar is used for detection without a fiducial element, then objects can be detected, but the system becomes susceptible to signal noise and external interference
Solution Approach 1:
The system creates a baseline signal profile from normal network operations and continuously compares current signals against this baseline. This feedback mechanism allows the system to distinguish between normal signal variations and those caused by human presence, filtering out noise and interference.
Solution Approach 2:
The system performs preliminary action by creating a baseline signal profile before detection begins. This baseline represents the normal state of the wireless network without human presence, enabling subsequent comparisons to identify deviations caused by detected objects.
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 detection of humans in indoor environments by analyzing signal changes caused by their presence, providing real-time presence and location tracking without the need for additional components, and allowing anonymous data collection.
Implementation Method 1
a human within the detection area will absorb and scatter RF waves transmitted therebetween
Implementation Method 2
a human within the detection area will absorb and scatter RF waves transmitted therebetween
Data Source
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AI summary
Systems and methods for detecting the presence of a body in a network without fiducial elements, using signal absorption, and signal forward and reflected backscatter of RF waves caused by the presence of a biological mass in a communications network.