THE INITIAL GOALS in the development of a motion detector were to produce a completed assembly capable of sensing motion at a minimum distance of 8' within a 2' surveillance diameter.Upon sensing motion, an alarm was to be sounded for a given time after which the system must automatically reset. A seeondary mode of operation termed search was defined in which the system would emit a flashing light and a random sequence of audible notes. Upon detecting its own reflection, the alarm was to be triggered and the …
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