Alarm device

Abstract

The invention discloses an alarm device which comprises a power supply module, a switch, a crystal oscillator circuit, an ultrasonic transducer, a single chip microcomputer control circuit, an amplifying circuit, a high-loudness horn and an ultrasonic generator. The single chip microcomputer is respectively connected with the switch, the crystal oscillator circuit, the ultrasonic transducer, the amplifying circuit and the ultrasonic generator, the switch is connected with the power supply module, a power supply can supply power for the whole device when the switch is closed, and the amplifying circuit is connected with the high-loudness horn. When an intruder breaks in, the high-loudness horn can give out high-loudness alarm sound to shock the intruder, and simultaneously a user cellphone can receives an alarm short message. The alarm device can effectively prevent thievery and is high in reliability.

Description

technical field [0001] The invention relates to an intelligent anti-theft alarm device, in particular to a GSM alarm device. Background technique [0002] There are various alarm devices on the market at present, although they have played a certain anti-theft effect, there are certain defects and problems. The existing patent 02109988.X and the described alarm are simple sound alarms, which can only be used as a deterrent. If there is no one at home, the intruder cannot be stopped, and its reliability is still not high; in the patent 03138321.1, the telephone line is used Call the police. At present, most families no longer use wired phones, but use mobile phones, so the limitations of use are relatively large. Contents of the invention [0003] Aiming at the defects of the background technology, the present invention proposes a GSM alarm device, which uses the GSM network to communicate with mobile phones to prevent theft, has very high reliability, and can effectively p...

AI Technical Summary

Problems solved by technology

[0002] At present, there are many kinds of alarms on the market. Although they have a certain anti-theft effect, there are certain defects and problems.

The existing patent 02109988.X and the described alarm are simple sound alarms, which can only be used as a deterrent. If there is no one at home, the intruder cannot be stopped, and its reliability is still not high; in the patent 03138321.1, the telephone line is used Call the police. At present, most families no longer use wired phones, but use mobile phones, so the limitations of use are relatively large

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