SYSTEMS AND METHODS OF DEVICE-FREE MOTION DETECTION AND PRESENCE DETECTION

• US 20170131125A1
• Filed: 09/06/2016
• Published: 05/11/2017
• Est. Priority Date: 12/13/2010
• Status: Active Grant

• Current Assignee: Xandem Technology, LLC
• Original Assignee: Xandem Technology, LLC
• Inventors: Wilson, Anthony Joseph, Patwari, Neal K.
• Granted Patent: US 10,107,655 B2
• Time in Patent Office: Days
• CPC Class Codes: G01D 21/00 Measuring or testing not otherwise provided for
• CPC Class Codes: G01S 5/02 using radio waves using satellite radio beacon systems for determining position G01S19/00
• CPC Class Codes: G01V 11/002 Details, e.g. power supply systems for logging instruments, transmitting or recording data, specially adapted for well logging, also if the prospecting method is irrelevant means for transmitting well survey signals E21B47/12; signal transmission systems in general G08C; transmission in general H04B
• CPC Class Codes: G08B 13/02 Mechanical actuation
• CPC Class Codes: G08B 13/187 by interference of a radiation field
• CPC Class Codes: G08B 13/2491 Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field
• CPC Class Codes: G08B 21/22 responsive to presence or absence of persons
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

Systems and methods are provided for device-free motion detection and presence detection within an area of interest. A plurality of nodes, configured to be arranged around the area of interest, form a wireless network. The plurality of nodes transmit wireless signals as radio waves and receive transmitted wireless signals. The received signal strength (RSS) of the transmitted wireless signals between the plurality of nodes are measured and a value is reported. A computing device receives the reported values for the measured RSS and tracks the reported values over time. The computing device processes the reported values using an aggregate disturbance calculation to detect motion and presence within the area of interest. The computing device may notify notification device of a detected disturbance within the area of interest.

Claims

1. A method of monitoring an area of interest, the method comprising:

positioning a plurality of nodes around the area of interest;

forming a wireless network between the plurality of nodes by each node of the plurality of nodes transmitting wireless signals as radio waves and each node of the plurality of nodes receiving transmitted wireless signals from one or more other nodes of the plurality of nodes;

measuring at each node of the plurality of nodes a measurable characteristic of the transmitted wireless signals between the plurality of nodes;

reporting, from each node of the plurality of nodes, values for the measurable characteristic of the transmitted wireless signals received from other nodes of the plurality of nodes; and

processing reported values, tracked over time, using an aggregate disturbance calculation to detect presence of an object within the area of interest, wherein detecting presence includes detecting presence of an object in an area of interest that is different than presence of objects in the area of interest when in a base state, and wherein the aggregate disturbance calculation is based on a plurality of reported values over a period of time.