Human body detection system
First Claim
1. A system for detecting a human body, comprising:
- (a) a condenser including a plurality of partial detection regions each having an elongated zone, and a plurality of effective detection regions each having a different area and correspondingly contained within each of said partial detection regions, said condenser condensing infrared rays radiated from the human body which may exist within one of said effective detection regions;
(b) an infrared detector for converting the infrared rays condensed on said effective detection regions through said condenser into electric signals;
(c) an amplifier for amplifying the electric signals derived from said infrared detector;
(d) a decision apparatus which detects fluctuation times or frequencies of the electric signals amplified by said amplifier and corresponding to said effective detection regions, specifies the effective detection regions having areas corresponding to thus detected fluctuation times or frequencies, and specifies partial detection regions containing said effective detection regions to judge a position where the human body may exist.
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Accused Products
Abstract
In order to detect a position where a human body may exist with the aid of a single infrared detector, a human body detecting system comprises a condenser for the provision of a plurality of effective detection regions each having different areas and provided within partial detection regions. When the human body moves across one of the effective detection regions, the infrared detector detects the infrared rays radiated from the human body to produce signals. Accordingly, the thus output signals present different frequencies depending on the effective detection regions, whereby the differences in the fluctuation times of the output signals and in the frequencies are discriminated by a decision apparatus to consequently detect which partial detection region includes the human body.
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Citations
9 Claims
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1. A system for detecting a human body, comprising:
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(a) a condenser including a plurality of partial detection regions each having an elongated zone, and a plurality of effective detection regions each having a different area and correspondingly contained within each of said partial detection regions, said condenser condensing infrared rays radiated from the human body which may exist within one of said effective detection regions; (b) an infrared detector for converting the infrared rays condensed on said effective detection regions through said condenser into electric signals; (c) an amplifier for amplifying the electric signals derived from said infrared detector; (d) a decision apparatus which detects fluctuation times or frequencies of the electric signals amplified by said amplifier and corresponding to said effective detection regions, specifies the effective detection regions having areas corresponding to thus detected fluctuation times or frequencies, and specifies partial detection regions containing said effective detection regions to judge a position where the human body may exist. - View Dependent Claims (2, 3, 4, 5)
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6. A system for detecting a human body, comprising:
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(a) a condenser including a plurality of partial detection regions each having an elongated zone, and a plurality of effective detection regions each contained within one of said partial detection regions, said partial detection regions each containing at least one said effective detection regions whose number and area vary;
said condenser condensing infrared rays radiated from the human body which may exist within one of said effective detection regions;(b) an infrared detector for converting the infrared rays condensed on said effective detection regions through said condenser into electric signals; (c) an amplifier for amplifying the electric signals derived from said infrared detector; and (d) a decision apparatus which detects fluctuation times or frequencies and the number of the electric signals amplified by said amplifier and corresponding to said effective detection regions, specifies the effective detection regions having areas corresponding to thus detected fluctuation times or frequencies and having the number of regions corresponding to thus detected number of the electric signals, and specifies partial detection regions containing said effective detection regions to judge a position where the human body may exist. - View Dependent Claims (7, 8, 9)
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Specification