CN202795691U

CN202795691U - Antitheft easily found alarm

Info

Publication number: CN202795691U
Application number: CN 201220459137
Authority: CN
Inventors: 李雯颖; 杨永才
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2012-09-11
Filing date: 2012-09-11
Publication date: 2013-03-13
Anticipated expiration: 2022-09-11

Abstract

The utility model relates to an antitheft easily found alarm. A sound sensor receives audio signals, converts the audio signals into voltage signals and transmits the voltage signals into a single chip microcomputer, the single chip microcomputer outputs the signals to an alarm lamp and a buzzer after comparing the received signals with an internal preset voltage value, and an input end of the single chip microcomputer is connected with a reset key. The alarm can be packaged into a box shape or various different shapes, serves as a key chain hung on small articles such as a key, a card holder and a mobile phone, and can also be made into a sheet pasted on one side of the card holder. The alarm is portable, attractive and ornamental, tiny articles can be conveniently found, and great convenience is brought for life of people.

Description

The antitheft alarm of easily seeking

Technical field

The utility model relates to a kind of alarm, particularly a kind of antitheft alarm of easily seeking.

Background technology

Along with the increasing and block dwindling of class volume of the important card classes such as bank card, transportation card, member card in the life, make people look for the trouble that loses a little card like this also having increased simultaneously easily of enjoying that the card class brings.Especially where be placed on conveniently afterwards in use, just be easy to occur looking for the situation that loses.

Summary of the invention

The utility model is the problem of be difficult for seeking for pocket-handkerchief in the life, has proposed a kind of antitheft alarm of easily seeking, and can be used as suspension member or ornaments and the article easily lost are put together, makes things convenient for the searching of article.

The technical solution of the utility model is: a kind of antitheft alarm of easily seeking, comprise sound transducer, single-chip microcomputer, hummer and alarm lamp, sound transducer receives sound signal and is converted into voltage signal and sends into single-chip microcomputer, single-chip microcomputer with the signal that receives and internal preset magnitude of voltage relatively after, output signal is to alarm lamp and hummer, and single-chip microcomputer is inputted the termination reset key.

It is AT89C51 that described single-chip microcomputer is selected model, can burned program.

The beneficial effects of the utility model are: the antitheft alarm of easily seeking of the utility model, and volume is little, light being easy to carry about with one, it is assorted both can conveniently to have sought these tiny things, and the also decoration function that plays very attractive in appearance is for people's life brings great convenience.

Description of drawings

Fig. 1 is the antitheft alarm arrangement block diagram of easily seeking of the utility model;

Fig. 2 is the antitheft interior single-chip microcomputer of alarm and the peripheral circuits figure of easily seeking of the utility model;

Fig. 3 is the antitheft interior single-chip microcomputer workflow diagram of alarm of easily seeking of the utility model.

Embodiment

The antitheft alarm arrangement block diagram of easily seeking as shown in Figure 1, alarm comprises sound transducer 1, single-chip microcomputer 2, hummer 3 and alarm lamp 4, single-chip microcomputer 2 interior burned corresponding alert program, alarm and key or card are put together, when can not find key or card, can send the higher sound of frequency ratio by the mode such as whistle, sound transducer 1 receives sound signal and is translated into electric signal and imports single-chip microcomputer 2 into, single-chip microcomputer 2 carries out computing by its corresponding program and judges, be higher than then alarm lamp 4 meeting flickers of preset value (this preset value is embodied in the program) if import voltage signal into, hummer 3 sends alarm bell.By sound and light, will soon find those very little card or keys like this.After finding article, but button is to close warning.The characteristics of the program of burned single-chip microcomputer 2 are: wherein can a corresponding boundary value be set according to the surrounding environment of life, only have sound to exceed this frequency, change into that magnitude of voltage input single-chip microcomputer 2 is rear just can to start warning device, like this false alarm with regard to effectively having avoided causing because surrounding environment is a riot of sound.

As shown in Figure 2 single-chip microcomputer and peripheral circuits figure, selecting model at this single-chip microcomputer 2 is AT89C51, the preset value of single-chip microcomputer 2 inside can according to the life in around sound a corresponding magnitude of voltage is set, when only having magnitude of voltage that sound transducer 1 imports into to exceed its preset value, single-chip microcomputer 2 is the meeting output signal, it is bright to drive buzzer warning and alarm lamp, just understands trigger alarm when that is to say the sound frequency that only has the people to send higher (sound is taper relatively).So just avoided the false alarm that brings because of noisy sound on every side in the life.The single-chip microcomputer workflow diagram as shown in Figure 3.

Alarm can select accordingly to meet the requirements and the original paper of area, small volume, thereby is packaged into smaller box.Also can be packaged into the shape of box-like or various different patterns, be hung on as key chain on the little article such as key, cutting ferrule, mobile phone, also can do slabbing and be affixed on cutting ferrule one side.Light being easy to carry about with one, it is assorted both can conveniently to have sought these tiny things, also the decoration function that plays very attractive in appearance.

Claims

1. antitheft alarm of easily seeking, it is characterized in that, comprise sound transducer, single-chip microcomputer, hummer and alarm lamp, sound transducer receives sound signal and is converted into voltage signal and sends into single-chip microcomputer, single-chip microcomputer with the signal that receives and internal preset magnitude of voltage relatively after, output signal is to alarm lamp and hummer, and single-chip microcomputer is inputted the termination reset key.

2. the described antitheft alarm of easily seeking according to claim 1 is characterized in that it is AT89C51 that described single-chip microcomputer is selected model, can burned program.