Burglar alarm device for balcony

The invention provides a burglar alarm device for a balcony. The burglar alarm device comprises a human body inducing module circuit, a voltage comparator circuit and a sound-light alarm circuit, wherein the human body inducing module circuit adopts a human body infrared induction module HC-SR501; t...

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1. Verfasser: LAN GUOLI
Format: Patent
Sprache:eng
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Zusammenfassung:The invention provides a burglar alarm device for a balcony. The burglar alarm device comprises a human body inducing module circuit, a voltage comparator circuit and a sound-light alarm circuit, wherein the human body inducing module circuit adopts a human body infrared induction module HC-SR501; the voltage comparator circuit adopts an LM358 chip; the sound-light alarm circuit comprises an alarm, a light emitting diode and controllable silicon; the human body inducing module circuit is used for detecting infrared heat release of a human body, and can control the voltage comparator circuit to output an up level when the detection result shows that a person intends to enter a room from the balcony, then the controllable silicon is triggered to be conducted, and the sound-light alarm circuit sends out sound and light continuously to warn and awe a thief and remind the owner of the room that the person intends to enter the room from the balcony. Therefore, the balcony mounted with the burglar alarm device has a burglar alarm function even when no metal anti-theft mesh is mounted.