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a passive infrared detector, the radiation emitted by an object spectral analyses
a passive infrared detector, the radiation emitted by an object spectral analyses
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机译:无源红外探测器,对物体发出的辐射进行光谱分析
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摘要
The sensor (3) breaks down the incident infrared radiation into four spectral channels for which corresp. wavelength-dependent electrical signals (A1-A4) are produced. These signals are filtered (4) and their amplitudes are evaluated (5) for presentation to a logic unit (6). The spectral fundamental patterns of emission characteristics of a variety of infrared sources are stored in the memory (7). The mean voltage amplitude over the entire wavelength range is used as a basis for comparison. If correspondence to the stored patterns lies within allowed limits, the source is identified and an alarm given.
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