CN202838569U

CN202838569U - Simple alarm device

Info

Publication number: CN202838569U
Application number: CN 201220499243
Authority: CN
Inventors: 胡旭林
Original assignee: Changchun University of Technology
Current assignee: Changchun University of Technology
Priority date: 2012-09-28
Filing date: 2012-09-28
Publication date: 2013-03-27
Anticipated expiration: 2022-09-28

Abstract

The utility model relates to a simple alarm device, belonging to the field of electronic devices, wherein a power supply voltage is converted into a secondary output 15 V AC voltage through a power supply transformer T1, and then rectified in a half-wave rectification mode by a diode VD1 and filtered by a capacitor C1 to obtain an operation power supply voltage of a switch control circuit formed by a transistor VT1 and a relay K2, two enameled wires K are led from an upper biasing resistor and connected with the base electrode B and the emitter electrode E of the transistor VT1, a relay K2 is arranged at the C electrode of the transistor VT1, the input side of the power supply transformer T1 is connected with an indication lamp circuit and an alarm circuit, the indication lamp circuit is formed by a light emitting diode LED and a resistor R2, and an alarm circuit is formed by a loudspeaker and a bulb.

Description

Simple alarm

Technical field

The utility model relates to electrical type, and is espespecially a kind of simple in structure for a kind of simple alarm is provided, the obvious simple alarm of anti-theft effect.

Background technology

The event stolen at the society article happens occasionally, and the vehicles such as stolen article such as electric motor car, motorcycle, bicycle, rural area pig house, sheepfold have had a strong impact on daily life also the time and stolen phenomenon occurs.

The utility model content

The purpose of this utility model is to provide a kind of simple alarm, be connected to some antitheft positions (enameled wire can infinitely prolong) by two enameled wires, when enameled wire disconnects, will be reported to the police by prior mounted alarm, simultaneously the light in the warning system is glittering, when the alarm that links together of two enameled wires just can stop or closing s ₁Switch is eliminated and is reported to the police.

The main electrical structure of the utility model is: 220V voltage is by power transformer T ₁, be converted into secondary output 15V alternating voltage, pass through again diode VD ₁Half-wave rectification and capacitor C ₁Filtering obtains the 12V DC voltage, as triode VT ₁And relay K ₂The supply voltage of the switch control circuit that forms.R ₁For 15K Ω'sUpper biasing resistance, it draws two enameled wire K(fine rules) be connected on triode VT ₁Base stage B and emitter E extremely go up relay K ₂Be arranged at triode VT ₁C extremely go up.

At power transformer T ₁Input side, be connected with indicator light circuit and warning circuit, indicator light circuit is the resistance R of LED and 100K Ω ₂Form resistance R ₂Be used to the LED current limliting;

Warning circuit is comprised of loudspeaker 1 and bulb 2, and loudspeaker 1 and bulb 2 can operate when power on circuitry by this simultaneously for being arranged in parallel.It is jointly by a two-way switch control;

Enameled wire K is as warning sensing original paper, when two joints of enameled wire K are in connection status, and triode VT ₁The BE utmost point between short circuit, triode VT ₁Do not work, at this moment relay K ₂Be in release conditions, relay K ₂Contact reversing switch " a " side, the LED pilot lamp is bright, represents working properlyly, wherein, is the resistance R of LED current limliting ₂Be 100K Ω; When enameled wire K is in off-state, relay K ₂Adhesive, relay K ₂Contact reversing switch " b " side, the LED pilot lamp extinguishes, bulb 2 glittering while loudspeakers 1 send warning, and then reach the purpose that frightens the resistance thief, eliminate to report to the police only two enameled wire K to be linked together or close s ₁Switch is just understood stop alarm, reaches practicality easy to use.The utility model is simple in structure, as long as wiring is correct, need not debugging can use, thereby reaches easy to use, saves the practicality of cost.

Description of drawings

Fig. 1 is circuit diagram of the present utility model.

Embodiment

As shown in Figure 1, the utility model mainly comprises: by among the figure as can be known, T1 is power transformer, secondary output 15V alternating voltage is through VD ₁Half-wave rectification and C ₁Filtering obtains the 12V DC voltage, as VT1 and K ₂The supply voltage of the switch control circuit that forms.R ₁Be upper biasing resistance.Draw two enameled wires (fine rule) and be connected on VT ₁Base stage B and emitter E extremely go up, enameled wire K is as warning sensing original paper.When two joints of enameled wire K connect, VT ₁BE knot between short circuit, VT1 does not work, this moment relay K ₂Discharge K ₂Contact swing to " 1 ", LED light " 2 " is bright; Represent working properly, when enameled wire disconnects, K ₂Adhesive, K ₂Contact swing to " 2 " LED light and extinguish, the glittering while loudspeaker of illuminating lamp sends warning.This alarm is simple to operate, as long as wiring is correct, need not debugging can use.Make material and instrument: 1 of power transformer 220V/15V, 1 on JRX-13F700 Ω relay, 1 of LED, 1 in 40W/220V bulb, electric capacity 47UF/25V1 are only, k is enameled wire (drawing materials according to physical length), 1 of resistance 15K Ω, 1 of resistance 100K Ω, 1 on 9013 triodes, 1 of loudspeaker, 1 on 220v bulb.

Method for making: shown in accompanying drawing 1 wiring diagram, T1 is power transformer, secondary output 15V alternating voltage, through VD1 half-wave rectification and C1 filtering, obtain the 12V DC voltage, the supply voltage of the switch control circuit that forms as VT1 and K2, R1 is upper biasing resistance, draws base stage B and the emitter E that two enamel-cover fine rules are connected to VT1 and extremely goes up, and enameled wire K is as warning sensing original paper, when two joints of enameled wire K connect, short circuit between the BE knot of VT1, VT1 does not work, relay K 2 releases this moment, the tie point of K2 is swung to position " 1 ", and LED light is bright; Represent working properly, when enameled wire disconnects, the K2 adhesive, the contact of K2 is swung to position " 2 ", LED light is extinguished, illuminating lamp is glittering, simultaneously loudspeaker sends warning.This alarm is simple to operate, as long as wiring is correct, need not debugging can use.

Claims

1. simple alarm is characterized in that comprising: 220V voltage is by power transformer T ₁, be converted into secondary output 15V alternating voltage, pass through again diode VD ₁Half-wave rectification and capacitor C ₁Filtering obtains the 12V DC voltage, as triode VT ₁And relay K ₂The supply voltage of the switch control circuit that forms; Upper biasing resistance R ₁Draw two enameled wire K and be connected to triode VT ₁Base stage B and emitter E on, relay K ₂Be arranged at triode VT ₁C extremely go up;

At power transformer T ₁Input side, be connected with indicator light circuit and warning circuit, indicator light circuit is LED and resistance R ₂Form; Warning circuit is comprised of loudspeaker (1) and bulb (2).

2. simple alarm according to claim 1 is characterized in that: wherein, loudspeaker (1) and bulb (2) are for being arranged in parallel.

3. simple alarm according to claim 1 is characterized in that: wherein, indicator light circuit and warning circuit are for being arranged in parallel, and it is jointly by a two-way switch control.