Integrated detecting processor
First Claim
1. An infrared sensor, comprising:
- an infrared generator for generating infrared radiation within a detecting area;
a pyroelectric sensor electrically communicated with said infrared generator, wherein said infrared radiation as an input signal is converted into a DC signal as an output signal through said pyroelectric sensor, wherein said DC output signal has a real signal with low frequency and a noise signal mixed therewith;
a microprocessor which comprises a A/D converter electrically connected with said pyroelectric sensor, wherein said microprocessor is arranged to receive said DC signal for data processing so as to determine whether a target locating within said detecting area; and
an integrated detecting processor, which is electrically connected with said microprocessor, adapted for stripping out said DC signal from said pyroelectric sensor to control a DC level of said DC signal, such that said real signal is allowed to be accurately processed in said microprocessor without data overflowing.
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Abstract
An infrared sensor includes an infrared generator for generating infrared radiation within a detecting area, a pyroelectric sensor, a microprocessor, and an integrated detecting processor. The pyroelectric sensor is electrically communicated with the infrared generator, wherein the infrared radiation as an input signal is converted into a DC signal as an output signal having a real signal with low frequency and a noise signal mixed therewith. The microprocessor includes an A/D converter electrically connected with the pyroelectric sensor, wherein the microprocessor is arranged to receive the DC signal for data processing. The integrated detecting processor, which is electrically connected with the microprocessor, is adapted for stripping out the DC signal from the pyroelectric sensor to control a DC level of the DC signal, such that the real signal is allowed to be accurately processed in the microprocessor without data overflowing.
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Citations
24 Claims
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1. An infrared sensor, comprising:
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an infrared generator for generating infrared radiation within a detecting area;
a pyroelectric sensor electrically communicated with said infrared generator, wherein said infrared radiation as an input signal is converted into a DC signal as an output signal through said pyroelectric sensor, wherein said DC output signal has a real signal with low frequency and a noise signal mixed therewith;
a microprocessor which comprises a A/D converter electrically connected with said pyroelectric sensor, wherein said microprocessor is arranged to receive said DC signal for data processing so as to determine whether a target locating within said detecting area; and
an integrated detecting processor, which is electrically connected with said microprocessor, adapted for stripping out said DC signal from said pyroelectric sensor to control a DC level of said DC signal, such that said real signal is allowed to be accurately processed in said microprocessor without data overflowing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A microprocessor for infrared sensor having a DC signal, comprising:
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a A/D converter; and
a signal analysis unit electrically connecting with said A/D converter for statistically analyzing said DC signal, wherein said signal analysis unit statistically collects a plurality of sample data from said DC signal via a time domain to dynamically control said sample data by itself, wherein a control range of said DC signal is determined from said sample data in such a manner that when said sample data falls out of said control range, said sample data is considered as a noise signal to be discarded from said DC signal, so as to accurately process a real data with low frequency in said DC signal in said A/D converter. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method of analyzing DC signal for A/D converter, comprising the steps of:
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(a) statistically collects a plurality of sample data from said DC signal via a time domain to dynamically control said sample data by itself;
(b) determining a control range of said DC signal from said sample data (c) discarding said sample data from said DC signal when said sample data falls out of said control range; and
(d) taking said sample data into account for processing in said A/D converter when said sample data falls within said control range. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification