Selective intrusion detection systems
A selective intrusion detection system includes a Doppler transceiver configured and adapted to receive Doppler return signals indicative of moving targets present in a surveillance space. A processor is operatively connected to the Doppler transceiver to convert Doppler return signals into spectrograms and to determine whether any given spectrogram is indicative of presence of a human or another moving target, like a domestic pet. An alarm is operatively connected to the processor, wherein the processor and alarm are configured to provide an alert in the event the processor determines any given spectrogram is indicative of a human, and to forego providing an alert in the event the processor determines any given spectrogram is indicative of another moving target only.
1. An intrusion alarm system for detecting the presence of a moving target in the presence of interfering phenomena, comprising:
a Doppler transceiver for transmitting signals into a surveillance zone;
means for reception of Doppler signals returned from said surveillance zone;
means to provide a spectrogram;
means for Doppler signal conditioning;
means for scene analysis from momentary spectrogram data;
means to evaluate aggregated data;
means to provide statistical analysis; and
wherein the means for reception of Doppler signals, the means to provide a spectrogram, the means for Doppler signal conditioning, the means for scene analysis, the means to evaluate aggregated data, and the means to provide statistical analysis are all operatively connected to a support-vector-machine that is loaded with a learning kernel trained with real-truths of a multitude of cases, followed by a hierarchical decision making, in order to provide an alert in the case of human target presence in the surveillance zone and to forego an alert in the event of other moving targets and interference phenomenon.