초록 ▼

A weapons detector (12) and method utilizing radar. The system comprises a transmitter (27) for producing an output (14) of frequencies of a set of self-resonant frequencies of weaponry; an antenna (28) directing the transmitter output toward locations potentially having weaponry and collecting back

A weapons detector (12) and method utilizing radar. The system comprises a transmitter (27) for producing an output (14) of frequencies of a set of self-resonant frequencies of weaponry; an antenna (28) directing the transmitter output toward locations potentially having weaponry and collecting backscattered signals (15); a receiver (29) receiving the backscattered signals (15) and operating over a range of the self-resonant frequencies; and a signal processor (30) for detecting the presence of a plurality of the self-resonant frequencies in the backscattered signals (15). Accuracies of greater than 98% can be obtained at distances, preferably between 4-15 yards. The weapons detector (12) is capable of detecting metal and non-metal weapons (16) on a human body (13) in purses, briefcases and under clothing; and discerning weapons (16) from objects such as belt buckles, coins, keys, calculators, cellular phones.

대표청구항 ▼

1. An object detector comprising:an electrical circuit for producing electromagnetic radiation; at least one antenna to transmit the produced radiation toward an object of interest and to collect radiation that is reflected from the object; an electrical circuit to process the collected reflected ra

1. An object detector comprising:an electrical circuit for producing electromagnetic radiation; at least one antenna to transmit the produced radiation toward an object of interest and to collect radiation that is reflected from the object; an electrical circuit to process the collected reflected radiation and convert the collected radiation to at least one waveform; a system to automatically compare waveform phase and amplitude information from the at least one waveform to pre-determined information; and an automatic affirmative signal if an approximate match is made between the information from the at least one waveform and the pre-determined information; wherein no image of the object of interest is displayed.