Patent ID: 9223045
Filing Date: 2015-12-29
Classification: G01V

Abstract:
1. A method, comprising: transmitting and receiving wireless RF signals from transceivers in a mesh communications network sensor field covering an area, the sensor field providing information from a first sensor; receiving information from a second sensor in the mesh communications network covering at least a portion of the area; determining a size of a target in the area from the first sensor information from changes in electromagnetic field (EMF) between transceivers caused by the target as the target moves into, out of, or within the sensor field, wherein the size of the target from the first sensor information is affected by dielectric constants for at least one material of interest associated with the target, wherein the changes in the EMF are measured as link quality changes between the transceivers due to the target; determining a size of the target in the area from the second sensor information; and comparing the size of the target from the first sensor information with the size of the target from the second sensor information to determine whether an anomaly exists based upon the size comparison.