Voice alarm system for shop
A voice alarm, store technology, applied in the direction of alarms, anti-theft alarms, instruments, etc., can solve the problem of high price, achieve the effect of low cost, simple alarm structure, and reduce cost expenditure
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[0014] Such as figure 1 As shown, the store voice alarm system includes a Fresnel lens, a pyroelectric infrared sensor, a signal amplification circuit, a signal acquisition and processing circuit, a microprocessor, a voice chip, and a power supply circuit. The Fresnel lens, pyroelectric The infrared sensor, the signal amplification circuit, the signal acquisition and processing circuit, and the microprocessor are connected in sequence, the power supply circuit is connected to the microprocessor, the voice chip is connected to the microprocessor; the pyroelectric infrared sensor is used to detect people Or pyroelectric infrared signals emitted by animals; the Fresnel lens is used to refract the pyroelectric infrared signals on the pyroelectric infrared sensor; the signal amplification circuit is used to amplify the electrical signals converted from the pyroelectric infrared signals The signal acquisition and processing circuit is used to collect the electrical signal of the sign...
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