CN104082941B

CN104082941B - A kind of zipper alarm device based on AT89C51 single-chip microcomputer

Info

Publication number: CN104082941B
Application number: CN201410256499.2A
Authority: CN
Inventors: 闫怀超; 李林杰; 黄俊革
Original assignee: Shanghai Institute of Technology
Current assignee: Shanghai Institute of Technology
Priority date: 2014-06-11
Filing date: 2014-06-11
Publication date: 2016-09-28
Anticipated expiration: 2034-06-11
Also published as: CN104082941A

Abstract

The present invention relates to a kind of zipper alarm device based on AT89C51 single-chip microcomputer, including circuit board, several to sheet metal with ann reset button, circuit board includes single-chip microcomputer, power circuit, crystal oscillating circuit, input trigger circuit, phonation circuit, reset circuit；Several both sides that sheet metal is placed in metal zip fastener, fix with metal zip fastener both sides respectively and contact, and metal zip fastener drawing makes every pair of sheet metal of correspondence be engaged successively, and metal zip fastener pulls open and makes every pair of sheet metal of correspondence separate successively；Every pair of sheet metal connects single-chip microcomputer input by input trigger circuit；Ann reset button input single-chip microcomputer input, terminates reporting to the police, and ann reset button connects single-chip microcomputer reset terminal by reset circuit；Single-chip microcomputer output connects phonation circuit, draws according to slide fastener and develops different music more.Compact, is directly built in bag, as long as slide fastener is opened, just starts antitheft triggering circuit, and alarm sends chimes of doom, reminds owner that slide fastener is opened, plays anti-theft function.

Description

A kind of zipper alarm device based on AT89C51 single-chip microcomputer

Technical field

The present invention relates to a kind of alarm device, particularly to a kind of zipper alarm device based on AT89C51 single-chip microcomputer.

Background technology

Slide fastener has been applied to the good many-side of life with features such as its convenience, simple in construction now, and the most various suitcase school bags are typically equipped with slide fastener, but the most also provide opportunity for thief.In the case of many, the slide fastener of school bag is opened, and owner has no to discover, thus causes the stolen of other valuables such as mobile phone wallet.

Summary of the invention

The present invention be directed to the stolen problem of other valuables such as mobile phone wallet, propose a kind of zipper alarm device based on AT89C51 single-chip microcomputer, compact, it is directly built in bag, as long as slide fastener is opened, just starting antitheft triggering circuit, alarm sends chimes of doom, remind owner that slide fastener is opened, play anti-theft function.

The technical scheme is that a kind of zipper alarm device based on AT89C51 single-chip microcomputer, including circuit board, several to sheet metal with ann reset button, circuit board includes single-chip microcomputer, power circuit, crystal oscillating circuit, input trigger circuit, phonation circuit, reset circuit；Several both sides that sheet metal is placed in metal zip fastener, fix with metal zip fastener both sides respectively and contact, and metal zip fastener drawing makes every pair of sheet metal of correspondence be engaged successively, and metal zip fastener pulls open and makes every pair of sheet metal of correspondence separate successively；Every pair of sheet metal connects AT89C51 single-chip microcomputer input by input trigger circuit；Ann reset button input AT89C51 single-chip microcomputer input, terminates reporting to the police, and ann reset button connects AT89C51 monolithic processor resetting end by reset circuit；The output of AT89C51 single-chip microcomputer connects phonation circuit；Power circuit is powered to AT89C51 single-chip microcomputer and phonation circuit, and crystal oscillating circuit provides clock pulses to AT89C51 single-chip microcomputer.

Described input trigger circuit selects AND circuit 74LS08, and every pair of sheet metal is as triggering switch, and switch one end ground connection, another terminates and door input, connects AT89C51 single-chip microcomputer input with door output.

Described phonation circuit includes several current-limiting resistance, several Darlington transistor and buzzer, and each delivery outlet of AT89C51 single-chip microcomputer passes through a current-limiting circuit, then accesses buzzer after a Darlington transistor carries out signal amplification.

The beneficial effects of the present invention is: present invention zipper alarm based on AT89C51 single-chip microcomputer device, reaction sensitivity is high, and anti-theft feature is strong；Structure is relatively easy, practical, and cost is promoted by relatively low being easy to.

Accompanying drawing explanation

Fig. 1 is present invention zipper alarm based on AT89C51 single-chip microcomputer apparatus structure schematic diagram；

Fig. 2 is input trigger circuit figure in the present invention；

Fig. 3 is phonation circuit figure of the present invention；

Fig. 4 is crystal oscillating circuit of the present invention and reset circuit of SCM figure；

Fig. 5 is power circuit diagram in the present invention；

Fig. 6 is zipper alarm software flow pattern of the present invention.

Detailed description of the invention

Zipper alarm apparatus structure schematic diagram based on AT89C51 single-chip microcomputer as shown in Figure 1, device circuit board 1 includes AT89C51 single-chip microcomputer 2, power circuit 3, crystal oscillating circuit 4, input trigger circuit 5, phonation circuit 6, reset circuit 7；AT89C51 single-chip microcomputer is that core carries out circuit design, can timely respond to and process triggering model and send warning.Metal zip fastener 13 both sides arrange 5 pairs of sheet metals 12, and slide fastener drawing is that 5 pairs of sheet metals 12 are engaged, and it is that 5 pairs of sheet metals 12 separate that slide fastener pulls open, and 5 pairs of sheet metals 12 connect input trigger circuit 5；Ann reset button 11 is put into zipper end and is placed in bag, or is arranged on the place being arbitrarily difficult to discover, touch, and warning stop button 11 connects reset circuit 7.

Input trigger circuit figure as shown in Figure 2, it is mainly characterized by comprising: that triggering circuit 5 is mainly made up of triggering sheet metal and AND circuit 74LS08, triggers sheet metal 12 and is fixed in zipper teeth, is wired to two inputs of gate circuit 74LS08.The outfan of gate circuit accesses the input/output port P0 of AT89C51 single-chip microcomputer.For plastic fastener, arranging sheet metal 12 in slide fastener both sides, two metal sheets occlusion during slide fastener drawing, sheet metal is in ground state, and through the conversion of gate circuit chip 74LS08, output low level enters AT89C51 single-chip microcomputer, now will not report to the police；When slide fastener pulls open, separately, sheet metal two ends are in vacant state to two metal sheets, change through gate circuit 74LS08, and output high level enters AT89C51 single-chip microcomputer, and AT89C51 single-chip microcomputer detects high level, trigger circuit and send audible alarm；For metal zip fastener, being directly connected in zipper teeth wire one end, the other end receives two inputs of gate circuit 74LS08, replaces sheet metal to realize Trigger Function with metal zip fastener tooth.

Phonation circuit figure as shown in Figure 3, it is mainly characterized by comprising: that phonation circuit 6 main element is current-limiting resistance, Darlington transistor and buzzer, and AT89C51 single-chip microcomputer connects current-limiting resistance, accesses buzzer composition phonation circuit through Darlington transistor.Phonation circuit 6, by arranging program, by the level signal of AT89C51 single-chip microcomputer output different frequency, carries out signal amplification through Darlington transistor, is input to buzzer and sends the tone of 3 continuous notes, and constantly rising tune, finally sends simple alarm music.

Crystal oscillating circuit and reset circuit of SCM figure as shown in Figure 4, it is mainly characterized by comprising: that crystal oscillating circuit 4 accesses AT89C51 single-chip microcomputer after being connected two electric capacity by the crystal oscillator of a 12MHz, provides stable clock pulses for AT89C51 single-chip microcomputer.Reset circuit 7 is made up of two parts, shown in Fig. 4 for AT89C51 reset circuit of SCM, power Vcc enter AT89C51 monolithic processor resetting end after connecting electric capacity C3, resistance R1 and ann reset button 11, make AT89C51 monolithic processor resetting；Ann reset button 11 in Fig. 2 simultaneously, power Vcc enter the input/output port P2.0 of AT89C51 single-chip microcomputer after connecting resistance and SR, press SR 11 when circuit alarm, and termination circuit is reported to the police.

Power circuit diagram as shown in Figure 5, it is mainly characterized by comprising: that power circuit 3 is made up of voltage stabilizing chip 78L05 and electric capacity, power circuit 3 uses two joint 5v button cells to power, battery is directly put in battery holder, battery holder positive pole accesses No. 1 pin of voltage stabilizing chip 78L05 by wire, and the negative pole of battery holder connects No. 2 pins of voltage stabilizing chip 78L05；The outfan of power circuit 3 connects No. 3 pins of voltage stabilizing chip 78L05, exports stable 5V power supply, provides power supply for AT89C51 single-chip microcomputer 1 and warning phonation circuit 6.Input/output terminal all accesses electric capacity, strobes.

Zipper alarm software flow pattern shown in Fig. 6, the frequency according to each note sounding is different, the frequency of definitional part note, then controls buzzer by simple definition numbered musical notation and sends single syllable and simple music to reach the purpose reported to the police.After slide fastener 13 drawing, the 5 pairs of metals triggering sheets 12 being distributed in slide fastener both sides contact with each other, and device is in silent status；When slide fastener is opened, first pair is triggered sheet and separates, access high level, after AND circuit is changed, sending triggering pulse, AT89C51 single-chip microcomputer obtains after receiving signal and triggers address of node value, and proceeds to warning phonation circuit 6, the numerical value mated by switch function lookup, so that buzzer sends corresponding music alarm；The degree being opened along with slide fastener 13 is increasing, and other four couples trigger sheet metal and can separate one by one, and now the tone of buzzer sounding can raise successively, the sound sent also can be increasing, when slide fastener 13 is opened completely, circuit goes out music alarm, and prompting user slide fastener 13 is opened.If it is desired to cancellation sounding is then pressed stop button and can be stopped sounding.When being only again opened after slide fastener 13 drawing, warning circuit just can send above-mentioned warning again.

Claims

1. a zipper alarm device based on AT89C51 single-chip microcomputer, it is characterized in that, including circuit board, several to triggering sheet metal and ann reset button, circuit board includes AT89C51 single-chip microcomputer, power circuit, crystal oscillating circuit, input trigger circuit, phonation circuit, reset circuit；Input trigger circuit includes several to triggering sheet metal and AND circuit 74LS08, several is separately fixed at plastic fastener tooth both sides to triggering sheet metal, is wired to two inputs of AND circuit 74LS08；The outfan of AND circuit 74LS08 accesses the input/output port P0 of AT89C51 single-chip microcomputer；During plastic fastener drawing, number is engaged one by one to triggering sheet metal, triggers sheet metal and be in ground state after occlusion, and through the conversion of AND circuit 74LS08, output low level enters AT89C51 single-chip microcomputer, now will not report to the police；When plastic fastener pulls open, number is to triggering sheet metal separately, trigger sheet metal two ends after Fen Kai and be in vacant state, change through AND circuit 74LS08, output high level enters AT89C51 single-chip microcomputer, AT89C51 single-chip microcomputer detects high level, AT89C51 single-chip microcomputer outputs signals to phonation circuit, and phonation circuit sends audible alarm；Ann reset button input AT89C51 single-chip microcomputer input, terminates reporting to the police, and ann reset button connects AT89C51 monolithic processor resetting end by reset circuit；Power circuit is powered to AT89C51 single-chip microcomputer and phonation circuit, and crystal oscillating circuit provides clock pulses to AT89C51 single-chip microcomputer.

Zipper alarm device based on AT89C51 single-chip microcomputer the most according to claim 1, it is characterized in that, when replacing plastic fastener with metal zip fastener, with the replacement of metal zip fastener tooth is several, triggering sheet metal being realized Trigger Function, every pair of metal zip fastener tooth connects AT89C51 single-chip microcomputer input by AND circuit 74LS08.