| 摘要 |
<p>PURPOSE:To detect a human body with high reliability without having the erroneous announcement by external factors by installing at least >=1 elements at both or one end of dual twin elements installed above and below. CONSTITUTION:The dual elements 1-a, 1-b are provided in one of the dual elements 3-a, 3-b and the dual elements 4-a, 4-b are disposed at one of the dual elements 2-a, 2-b. The output of the element 1 is obtd. and in succession the outputs of the elements 2 and 3 are simultaneously obtd. in this way when the human body moves in an arrow direction (from 1-a to 4-b). The output of the element 4 is finally obtd. There are no outputs of the elements 1, 3 and only the outputs of 2 and 4 are obtd. for the movement of a small animal and insect exclusive of the movement of the man and, therefore, such animal and insect are identifiable. Further, the signal processing to avoid recognizing as the moving body with respect to incoming light and an abrupt change in environmental temp. is possible unless the time difference of the outputs thereof is obtd.</p> |
