Active scanning pyroelectric infrared induction switch
The invention discloses an active scanning pyroelectric infrared induction switch. The switch comprises pyroelectric infrared sensors, an infrared chopping modulation device is arranged in front of the pyroelectric infrared sensors, the infrared chopping modulation device is provided with a pluralit...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses an active scanning pyroelectric infrared induction switch. The switch comprises pyroelectric infrared sensors, an infrared chopping modulation device is arranged in front of the pyroelectric infrared sensors, the infrared chopping modulation device is provided with a plurality of windows, the infrared chopping modulation device is connected with a driving mechanism, the pyroelectric infrared sensors correspond to the windows, the pyroelectric infrared sensors send signals to the driving mechanism after sensing infrared signals through the windows, and the driving mechanism drives the infrared chopping modulation device to move. The infrared chopping modulation device is arranged in front of the pyroelectric infrared sensors; when the pyroelectric infrared sensors sense the infrared signals, the infrared chopping modulation device begins to move, external infrared signals are cut off sometimes and sensed sometimes through movement of the infrared chopping modulation device, and therefor |
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