Peripheral Video Presence Detection Using Wireless Signal Triangulation
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Solution Overview
Problem
Video presence detection systems, such as cameras, have limited fields of view and are prone to interference, making it difficult to detect and identify individuals or devices outside their field of view, especially in security applications where additional context or identification is needed.
Innovation Solution
The system detects wireless signals like WiFi or Bluetooth signals, even if the source is not within the camera's view, and processes this information to identify devices or individuals, supplementing visual recordings with contextual data such as location and time, allowing for triangulation to determine the source's location and adjust camera settings accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If video cameras are used for presence detection, then visual recording capability is provided, but the field of view is limited and static
Solution Approach 1:
The patent combines video camera functionality with wireless signal detection capabilities into a single integrated system. The camera device includes both an image sensor for visual recording and a wireless communication module for detecting WiFi, Bluetooth, and other wireless signals, allowing simultaneous operation of both detection methods to overcome the limited field of view of traditional cameras.
Solution Approach 2:
The camera device is designed to perform multiple functions: visual recording, wireless signal detection, device identification, and presence detection. This multi-functional approach allows the system to detect both visual and non-visual presence, effectively expanding the detection coverage beyond the static camera field of view.
2Reliability
If traditional video cameras are used, then visual detection is provided, but interference from blocking the lenses occurs
Solution Approach 1:
The patent introduces wireless signal detection as an intermediary method for presence detection that does not rely on direct line-of-sight to the target. Instead of requiring unobstructed visual access to the subject, the system detects wireless signals emitted by devices carried by individuals, which can penetrate obstacles and provide reliable detection even when the camera lens is blocked.
3Loss of information
If wireless signal detection is added to cameras, then detection coverage is expanded, but device complexity increases
Solution Approach 1:
The patent integrates wireless communication modules that are commonly found in modern smartphones and computers into the camera device. By merging these existing wireless detection capabilities with the camera's image processing unit, the system expands detection coverage without requiring entirely separate complex subsystems, thus managing overall device complexity.
4Measurement precision
If multiple cameras are deployed for triangulation, then location precision is improved, but system complexity increases
Solution Approach 1:
The patent divides the detection task among multiple camera devices, each independently detecting wireless signals and recording images. The central processing system then segments the data from each camera and performs triangulation calculations to determine precise device locations. This segmentation allows location precision to be improved through multiple sensors while keeping individual camera units relatively simple.
Data Source
AI summary
Systems, apparatuses, and methods are described for the detection of a device that may be in the presence of a video camera and may be sending and receiving signals within a local network. The device may be inside or outside the video camera's field of view. The camera or associated network device such as a router may discover the device in the periphery of or outside the field of view of the camera by detecting transmissions from the device, such as WiFi, Bluetooth, cellular or other wireless transmissions. The video camera may determine identifying information for the device from the transmissions and may store and transmit for analysis the information along with captured video.