Investigation of an Electromagnetic Induction Sensor.

摘要

In recent years, advanced EMI sensors that use a broad range of frequencies long with advanced signal processing have been shown to be capable of discrimination between buried land mines and many types of buried metal clutter. For these EMI sensors to be effective, they must be able to accurately, repeatably, and quickly measure the response of a buried target. This is difficult because the sensor must operate with bandwidths greater than 100 to 1 while accurately measuring signals that are more than 80dB smaller than the direct coupling between the coils. To accomplish this, the EMI sensor must be very cleverly designed to account for the coupling and for the secondary effects such as the resonances in the coils. In this work, we are investigating a new methods of constructing and extracting information from such EMI sensors. The ultimate goal of this research is the development of an EMI measurement system that can accurately measure the broad-band response of a buried target for both very strong and weak targets.