Intrusion Detection

The objective of intrusion detection is to show proof of principal and feasibility of single insertion point system to monitor intrusions in a secured building.

MTRI's engineers technical approach is to use indigenous power lines embedded in building, connect into fuse box of building, and exploit an induced electric field by using an impedance bridge to sense changes in impedance due to the presence of a person and using multi-port measurements and frequency diversity to provide some spatial specificity to the intrusion detection.

The intrusion detection program is funded by the U.S. Government.

Researchers collected data from two circuits at a residential dwelling. A researcher outside communicated with the intruder, instructing him to move through the course, while another researcher noted times and events

Normal walk through labeled locations on the east circuit.

For Additional Information

Nikola Subotic, Ph.D.

Joseph Burns, Ph.D.
Senior Research Scientist


Buller, W., Wilson, B. (2006). Measuring the Capacitance of Electrical Wiring and Humans for Proximity Sensing with Existing Electrical Infrastructure. IEEE International Conference on Electro/information Technology: 93 - 96.

Figure showing the normalized difference in mean values relative to background.