Voice alarm system for shop

Abstract

The invention discloses a voice alarm system for a shop. The voice alarm system comprises a Fresnel lens, a pyroelectric infrared sensor, a signal amplifying circuit, a signal collecting and processing circuit, a microprocessor, a voice chip and a power circuit, wherein the Fresnel lens, the pyroelectric infrared sensor, the signal amplifying circuit, the signal collecting and processing circuit and the microprocessor are sequentially connected; the power circuit is connected with the microprocessor; the voice chip is connected with the microprocessor; the pyroelectric infrared sensor is used for detecting a pyroelectric infrared signal emitted from a person or an animal; and the Fresnel lens is used for refracting the pyroelectric infrared signal to the pyroelectric infrared sensor. According to the voice alarm system, an offender entering the shop is subjected to pyroelectric infrared induction by using the pyroelectric infrared sensor, and the microprocessor receives the signal of the pyroelectric infrared sensor and immediately triggers the voice chip to carry out voice warning on the offender, so that the alarm structure is simple, the cost is low, and the cost expenditure of a shopkeeper is effectively reduced.

Description

Technical field [0001] The invention relates to an alarm system, in particular to a store voice alarm system. Background technique [0002] With the vigorous development of my country's economic construction, the floating population in cities has increased greatly, which has brought a lot of trouble to the public security management in the city. According to the survey, the crime rate in the city is showing a rising trend. At present, people's living standards are improving day by day, and more attention is paid to personal and property safety. The past mechanical anti-theft system has many shortcomings in practical application. Therefore, modern store anti-theft should be considered from the two aspects of "human defense" and "technical defense". Only by combining these two methods reasonably can it be better. The guarantor's identity and property security. However, the current store’s technical anti-theft alarm system uses imported products, which are expensive, which is a si...

AI Technical Summary

Problems solved by technology

However, at present, the alarm system used in the technical anti-theft of stores uses imported products, which are expensive, and it is not a small cost for stores operating small businesses.

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