Multimodal Audience Detection Using BLE and UWB Radar
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Solution Overview
Problem
Existing audience monitoring techniques face challenges in accurately determining audience presence and demographics due to signal interference and variability in indoor environments, particularly with Bluetooth Low Energy (BLE) signals, which are affected by room configurations and obstructions.
Innovation Solution
The use of multimodal audience detection systems that combine BLE packet scanning with Ultra-wide Band (UWB) radar and a multi-axis antenna array to analyze signal strengths and determine representative values, incorporating a dynamic threshold and voting mechanism to improve accuracy and reduce false positives, while correlating monitoring information with radar detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If Bluetooth Low Energy (BLE) packet scanning is used for audience detection, then device compatibility and ease of operation are improved, but measurement precision and reliability deteriorate due to signal interference and variability in indoor environments
Solution Approach 1:
The patent combines multiple signal detection methods (BLE packet scanning, UWB radar, multi-axis antenna array) into a unified audience detection system. This merging allows the system to cross-validate signals and distinguish true audience presence from environmental interference, thereby improving measurement precision while maintaining ease of operation.
Solution Approach 2:
The patent introduces intermediary processing mechanisms including dynamic threshold adjustment and voting mechanisms that mediate between raw signal data and final audience detection results. These intermediaries filter out false positives caused by signal variability and provide more reliable measurement accuracy.
2Reliability
If dynamic threshold and voting mechanism are implemented to improve measurement precision, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic threshold adjustment that adapts to changing environmental conditions rather than using fixed thresholds. This dynamic approach maintains high reliability across varying indoor environments while the automation of the adjustment process minimizes the perceived complexity for users.
Solution Approach 2:
The voting mechanism incorporates feedback loops where detection results from multiple signal sources are continuously evaluated and cross-validated. This feedback-based approach improves reliability by confirming audience presence through multiple independent signal corroboration, while the systematic nature of the feedback process manages complexity through structured decision-making.
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 enhances the reliability of audience presence monitoring by improving signal consistency and accuracy, effectively tracking audience members even without BLE-compatible devices, and providing more precise demographic data.
Implementation Method 1
a multi-axis receiver on a plurality of different signal polarizations
Implementation Method 2
Ultra-wide Band (UWB) radar
Data Source
AI summary
Methods, apparatus, systems and articles of manufacture are disclosed for multimodal audience detection and identification. An example system disclosed herein includes at least one memory, instructions in the apparatus, and processor circuitry to execute the instructions to: select a portion of a set of signal strength values associated with advertising packets from a device associated with a user, the advertising packets captured by a multi-axis receiver on a plurality of different signal polarizations; calculate a first representative signal strength value based on the selected portion of signal strength values; and determine a presence of the user based on whether the first representative signal strength value satisfies a threshold.