CN102903195A - Household safety alarm device - Google Patents

Abstract

The invention relates to the safety protection technical field and provides a household safety alarm device, aiming to provide a safety protection device which is simple in structure, low in cost, high in reliability and suitable for common people. The device comprises a sensing electrode A, a magnetic control switch S1, a switch S2, variable resistors RP1-RP3, resistors R1-R6, capacitors C1-C4, a relay K, a time base integrated circuit chip NE555, a power switch integrated chip TWH8751, a music chip KD9561, a loudspeaker BL, triodes V1-V2, a diode VD and a power source VCC. The household safety alarm device is used for safety protection equipment.

Description

A kind of domestic safety warning device

Technical field

The present invention designs technical field of security and protection, and a kind of domestic safety warning device is provided.

Background technology

Along with developing rapidly of science and technology and providing of people's material and cultural life, people are also increasing to the demand of home safety sense, but along with the development of science and technology, the gimmick of committing a crime of theft gang also becomes and emerges in an endless stream.They are not the cliques of a backwardness, and they also must utilize high-tech to commit a crime.Thereby the detection burglary, become a great problem of public security organ.The responsibility of public security organ is not only in the avoid theft generation of crime, and John Q. Public also should be nursed the property of oneself certainly, in order to avoid the robber has an opportunity to take advantage of.Those unserviced properties particularly provide the crime environment of " excellence " especially for the thief.Thereby guard against theft and alarm system is installed at home, be the stolen effective ways of prevention.In the time of unmanned among the manager, the valuables in the family have just become main " caring for " in the heart.In order to go out more securely, it is the most direct method that burglar alarm is installed at home.Before going out, start alarm, when there being the people illegally to enter when interior, touched the already alarm of device.Alarm just can be made the sound, to frighten the robber away or to cause neighbours' attention, accomplishes antitheft purpose.But what make equally that owner has a headache is exactly: various alarms being arranged on the market, select, is difficult matter feelings, worries such-and-such thing.Be exactly their sexual valence problem in addition ...

Summary of the invention

The object of the present invention is to provide a kind of simple in structure, stable performance, a kind of domestic safety warning device that cost performance is high in order to effectively prevent the generation of theft, thereby improves the sense of security that people live at home.

The present invention is by the following technical solutions to achieve these goals:

A kind of domestic safety warning device is characterized in that: comprise induction electrode A, magnetic switch S1, switch S 2, variable resistor RP1-RP3, resistance R 1-R6, capacitor C 1-C4, relay K, time-base integrated circuit chip NE555, power switch integrated chip TWH8751, Music Clip KD9561, loudspeaker BL, triode V1-V2, diode VD, power supply VCC

8 pin of described time-base integrated circuit chip NE555 meet power supply VCC, the 1 pin ground connection of time-base integrated circuit chip NE555, the 2 pin ground connection of time-base integrated circuit chip NE555,5 pins of time-base integrated circuit chip NE555 are by capacitor C 1 ground connection, 6 pins of time-base integrated circuit chip NE555 are on the one hand by variable resistor PR1 ground connection, meet on the one hand induction electrode A, 4 pin of time-base integrated circuit chip NE555 meet power supply VCC by magnetic switch S1, power supply VC provide resetting voltage, 3 pins of time-base integrated circuit chip NE555 connect 2 pins of power switch integrated chip TWH8751 by variable resistor RP2

Capacitor C 2 one end ground connection, the other end meets power supply VCC by resistance R 2 on the one hand, and power supply VCC is capacitor C 2 chargings by resistance R 2, connects on the one hand 3 pin of time-base integrated circuit chip NE555 by variable resistor RP2, and 3 pin are used for capacitor C 2 discharges;

2 pins of described power switch integrated chip TWH8751 often start closed contact ground connection by relay K, 1 pin of power switch integrated chip TWH8751 is opened the link that contact and switch S 2 connect capacitor C 2 and resistance R 2 by relay K normally closed moving, capacitor C 2 provides high level for 1 pin of power switch integrated chip TWH8751,1 pin of power switch integrated chip TWH8751 is by the output terminal pin 3 that often starts closed contact connection Music Clip KD9561 of relay K, 4 ends of power switch integrated chip TWH8751 are by the base stage of resistance R 4 connecting triode V1, the emitter of triode V1 connects power supply, the base stage of triode V1 collector connecting transistor V2, the grounded emitter of triode V2, triode V2 collector is succeeded electrical equipment K one end by resistance R 6, another termination power of relay K VCC, the relay two ends connect fly-wheel diode VD, described loudspeaker BL one termination power VCC, the output pin 4 of a termination power switch integrated chip TWH8751.

Among the present invention, time-base integrated circuit chip NE555 is called for short " IC1 ", and power switch integrated chip TWH8751 is referred to as " IC2 ", and Music Clip KD9561 is called for short " IC3 ".

Behind the work plugged, door is in normal closed condition at ordinary times, and S1 is in closure state under the effect of permanent magnet on the doorframe, and 5 pin of IC1 are high level, and 1 pin of IC2,2 pin and 4 pin are high level, V1 and V2 cut-off, and not adhesive of K, BL is sounding not.When having the robber to prize door lock, the noise signal of human body sensing adds to 6 pin of IC1 through induction electrode A, make the discharge circuit work of 3 pin inside, C2 is through the 3 pin discharge of RP2 and IC1, make the 2 pin voltage drops of IC2, when the 2 pin voltages of IC2 are down to the 1.2V left and right sides, the electronic switch conducting of IC2 inside, 5 pin output low levels, make V1 and V2 saturation conduction, the K adhesive of switching on, normally open contact K1 connects, and the 2 pin clampers that make IC2 are low level (control signal that 2 pin of IC2 are in low level 1 pin is just effectively), the normally closed interlock of contact K2 disconnects, normally open contact is connected, and the audio electric signal of IC3 output drives BL chimes of doom occurs after IC2 amplifies.If the robber forces open the door, then S1 disconnects, and 3 pin of IC1 become low level, and the electronic switch of IC2 inside is connected, and warning circuit also can be worked.

Because the present invention adopts above technical scheme, can think no-knock the time in the crime one's share of expenses for a joint undertaking, send chimes of doom, give the crime one's share of expenses for a joint undertaking with deterrence, and the present invention adopt technique scheme, even the robber forces open the door, then S1 disconnects, 3 pin of IC1 become low level, and the electronic switch of IC2 inside is connected, and warning circuit also can be worked.Reliability of the present invention is strong, and with low cost, and cost performance is high, and be fit to the general common people and use, be that common people afford to use high-tech product.

Description of drawings

Fig. 1 is circuit theory diagrams of the present invention.

Embodiment

The invention provides a kind of domestic safety warning device, it is characterized in that: comprise induction electrode A, magnetic switch S1, switch S 2, variable resistor RP1-RP3, resistance R 1-R6, capacitor C 1-C4, relay K, time-base integrated circuit chip NE555, power switch integrated chip TWH8751, Music Clip KD9561, loudspeaker BL, triode V1-V2, diode VD, power supply VCC

8 pin of described time-base integrated circuit chip NE555 meet power supply VCC, the 1 pin ground connection of time-base integrated circuit chip NE555, the 2 pin ground connection of time-base integrated circuit chip NE555,5 pins of time-base integrated circuit chip NE555 are by capacitor C 1 ground connection, 6 pins of time-base integrated circuit chip NE555 are on the one hand by variable resistor PR1 ground connection, meet on the one hand induction electrode A, 4 pin of time-base integrated circuit chip NE555 meet power supply VCC by magnetic switch S1, power supply VC provide resetting voltage, 3 pins of time-base integrated circuit chip NE555 connect 2 pins of power switch integrated chip TWH8751 by variable resistor RP2

Capacitor C 2 one end ground connection, the other end meets power supply VCC by resistance R 2 on the one hand, and power supply VCC is capacitor C 2 chargings by resistance R 2, connects on the one hand 3 pin of time-base integrated circuit chip NE555 by variable resistor RP2, and 3 pin are used for capacitor C 2 discharges;

2 pins of described power switch integrated chip TWH8751 often start closed contact ground connection by relay K, 1 pin of power switch integrated chip TWH8751 is opened the link that contact and switch S 2 connect capacitor C 2 and resistance R 2 by relay K normally closed moving, capacitor C 2 provides high level for 1 pin of power switch integrated chip TWH8751,1 pin of power switch integrated chip TWH8751 is by the output terminal pin 3 that often starts closed contact connection Music Clip KD9561 of relay K, 4 ends of power switch integrated chip TWH8751 are by the base stage of resistance R 4 connecting triode V1, the emitter of triode V1 connects power supply, the base stage of triode V1 collector connecting transistor V2, the grounded emitter of triode V2, triode V2 collector is succeeded electrical equipment K one end by resistance R 6, another termination power of relay K VCC, the relay two ends connect fly-wheel diode VD, described loudspeaker BL one termination power VCC, the output pin 4 of a termination power switch integrated chip TWH8751.

Among the present invention, time-base integrated circuit chip NE555 is called for short " IC1 ", and power switch integrated chip TWH8751 is referred to as " IC2 ", and Music Clip KD9561 is called for short " IC3 ".

Behind the work plugged, door is in normal closed condition at ordinary times, and S1 is in closure state under the effect of permanent magnet on the doorframe, and 5 pin of IC1 are high level, and 1 pin of IC2,2 pin and 4 pin are high level, V1 and V2 cut-off, and not adhesive of K, BL is sounding not.When having the robber to prize door lock, the noise signal of human body sensing adds to 6 pin of IC1 through induction electrode A, make the discharge circuit work of 3 pin inside, C2 is through the 3 pin discharge of RP2 and IC1, make the 2 pin voltage drops of IC2, when the 2 pin voltages of IC2 are down to the 1.2V left and right sides, the electronic switch conducting of IC2 inside, 5 pin output low levels, make V1 and V2 saturation conduction, the K adhesive of switching on, normally open contact K1 connects, and the 2 pin clampers that make IC2 are low level (control signal that 2 pin of IC2 are in low level 1 pin is just effectively), the normally closed interlock of contact K2 disconnects, normally open contact is connected, and the audio electric signal of IC3 output drives BL chimes of doom occurs after IC2 amplifies.If the robber forces open the door, then S1 disconnects, and 3 pin of IC1 become low level, and the electronic switch of IC2 inside is connected, and warning circuit also can be worked.

Because the present invention adopts above technical scheme, can think no-knock the time in the crime one's share of expenses for a joint undertaking, send chimes of doom, give the crime one's share of expenses for a joint undertaking with deterrence, and the present invention adopt technique scheme, even the robber forces open the door, then S1 disconnects, 3 pin of IC1 become low level, and the electronic switch of IC2 inside is connected, and warning circuit also can be worked.Reliability of the present invention is strong, and with low cost, and cost performance is high, and be fit to the general common people and use, be that common people afford to use high-tech product.

Claims (1)

1. a domestic safety warning device is characterized in that: comprise induction electrode A, magnetic switch S1, switch S 2, variable resistor RP1-RP3, resistance R 1-R6, capacitor C 1-C4, relay K, time-base integrated circuit chip NE555, power switch integrated chip TWH8751, Music Clip KD9561, loudspeaker BL, triode V1-V2, diode VD, power supply VCC

8 pin of described time-base integrated circuit chip NE555 meet power supply VCC, the 1 pin ground connection of time-base integrated circuit chip NE555, the 2 pin ground connection of time-base integrated circuit chip NE555,5 pins of time-base integrated circuit chip NE555 are by capacitor C 1 ground connection, 6 pins of time-base integrated circuit chip NE555 are on the one hand by variable resistor PR1 ground connection, meet on the one hand induction electrode A, 4 pin of time-base integrated circuit chip NE555 meet power supply VCC by magnetic switch S1, power supply VC provide resetting voltage, 3 pins of time-base integrated circuit chip NE555 connect 2 pins of power switch integrated chip TWH8751 by variable resistor RP2

Capacitor C 2 one end ground connection, the other end meets power supply VCC by resistance R 2 on the one hand, and power supply VCC is capacitor C 2 chargings by resistance R 2, connects on the one hand 3 pin of time-base integrated circuit chip NE555 by variable resistor RP2, and 3 pin are used for capacitor C 2 discharges;

2 pins of described power switch integrated chip TWH8751 often start closed contact ground connection by relay K, 1 pin of power switch integrated chip TWH8751 is opened the link that contact and switch S 2 connect capacitor C 2 and resistance R 2 by relay K normally closed moving, capacitor C 2 provides high level for 1 pin of power switch integrated chip TWH8751,1 pin of power switch integrated chip TWH8751 is by the output terminal pin 3 that often starts closed contact connection Music Clip KD9561 of relay K, 4 ends of power switch integrated chip TWH8751 are by the base stage of resistance R 4 connecting triode V1, the emitter of triode V1 connects power supply, the base stage of triode V1 collector connecting transistor V2, the grounded emitter of triode V2, triode V2 collector is succeeded electrical equipment K one end by resistance R 6, another termination power of relay K VCC, the relay two ends connect fly-wheel diode VD, described loudspeaker BL one termination power VCC, the output pin 4 of a termination power switch integrated chip TWH8751.

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