| 摘要 |
<p>PROBLEM TO BE SOLVED: To detect a metal body held by a human being while moving. SOLUTION: A signal processing part 72 outputs a radiation heat detection signal to an output part 76 and a transceiving control part 73 in the case of judging that infrared rays received by an infrared ray detecting part 71 is radiant heat from a human being. A milli-wave radar 74, when a transceiving start signal is inputted from the transceiving control part 73, generates and irradiates milli-waves, receives reflected waves to generate frequency spectrum from the reflected waves and outputs it to a judging part 75 through the transceiving control part 73. The judging part 75 compares the inputted frequency spectrum with the previously prepared change pattern of frequency spectrum, judges whether the reflected waves are reflected from the metal body and outputs the judged result to an output part 77.</p> |
