CN2334055Y

CN2334055Y - anti-theft alarm

Info

Publication number: CN2334055Y
Application number: CN 98230046
Authority: CN
Inventors: 张和明
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-01-12
Filing date: 1998-01-12
Publication date: 1999-08-18
Anticipated expiration: 2008-01-12

Abstract

The utility model relates to an anti-theft alarm with vibration warning and wire break alarming functions. The automatic alarm device is characterized in that a magnetic control switch, a silicon controlled electronic switch and a vibration sensor are adopted as sensors, a storage battery is adopted as a power supply, a rectification charging circuit is arranged, a starting detection circuit is arranged, whether the circuit works normally or not can be detected, vibration warning time is 6-10 seconds, alarm time is 27-33 seconds, and the automatic alarm device can stop giving an alarm. The alarm has stable operation, reliable work and convenient installation and use, and is suitable for being used as an anti-theft alarm device in families, warehouses and offices.

Description

Burglar alarm

The utility model is a kind of and the burglar alarm antitheft door adapted.

At present, general family, shop all are equipped with the reinforcing bar antitheft door, because this antitheft door is simple in structure, can not pick-proof, protecting against shock, and usually do not have antitheft effect.Developed country is used for antitheft device, all adopting antitheft door to add alarm is used, and the present alarm of China, also be only limited to important departments such as military organs, bank, warehouse, be not used widely, traced it to its cause two: one, the alarm price of warning that class is high such as video camera formula is too high, and average family economy is difficult to bear; The 2nd, low and middle-grade times alarm such as infra-red alarm, microwave, ultrasound wave alarm, again because of keep in dark place, To Be Protected from Heat or be afraid of wind, be afraid of to disturb that can't distinguish humans and animals, particularly the circuit working instability can only be installed in indoor again, can not be installed on the door, the thief is reported to the police immediately once entering.

The purpose of this utility model is: for overcoming existing simple defective that adopts antitheft door and existing alarm price height, job insecurity, insecure defective, provide a kind of be used with antitheft door and price lower, the stable and reliable operation burglar alarm.

The purpose of this utility model is achieved in that burglar alarm is made up of switch and comparer, delay trigger circuit, monostable circuit, warning musical film, vibration transducer, amplifier, impact damper, monostable circuit, caution musical film, power amplifier and power supply, start time-delay output circuit, and its feature is:

(1) described switch adopts magnetic switch JK and electronic switch controllable silicon VS ₁Comparer IC is inserted in back in parallel ₁Input end; Delay trigger circuit is by the NE555 chip IC ₂And resistance R ₇, capacitor C ₄, voltage stabilizing diode DW ₁Form, suitably select R ₇, C ₄Value, can make in the permission time, open the door, window, can not send chimes of doom; Start time-delay output circuit is by the NE555 chip IC ₃And the resistance R of input termination ₁₀, capacitor C ₆, C ₅, IC ₃The transistor BG of output termination ₃, BG ₄, controllable silicon VS ₂Deng composition.As power switch K ₂When closed, because of capacitor C ₅On voltage can not suddenly change, this moment IC ₃Output terminal is a noble potential, makes and IC ₃The transistor BG that output terminal links to each other ₃Conducting, BG ₄All end with controllable silicon, supply voltage can not pass through VS ₂Be added to magnetic switch, comparer and power amplifier make it and can not work at once, but IC ₃The high voltage of output terminal is through resistance R ₁₅, R ₁₆After the dividing potential drop, make warning musical film 9561IC ₄By piezoelectric ceramic piece Y ₁Send slight alarm signal bugle call, judge for the start people whether line work is normal.Work as IC ₃When entering stable state after transient state time is intact, IC ₃Output terminal no-voltage output, it stops self-test signal sound on the one hand, makes transistor BG on the other hand ₃End, at this moment transistor BG ₄With controllable silicon VS ₂All conductings make supply voltage pass through VS ₂Be added to magnetic switch, on comparer and the power amplifier it started working.Regulate resistance R ₁₀, capacitor C ₆Value, can adjust the length of self-test signal sound time.

(2) this burglar alarm also is provided with by piezoelectric ceramic chip Y ₂Add the vibration transducer that the sponge substrate is formed, be installed in door or window back side concealed location.When the people knocks at the door, vibration transducer Y ₂Just produce an electric signal, through transistor BG ₆, BG ₇, BG ₈Amplifying circuit Deng constituting enters by transistor BG ₉, resistance R ₂₈, R ₂₉, capacitor C ₁₃And voltage stabilizing diode DW ₃The impact damper of forming, (set up impact damper order be: have only light dynamics knock at the door continuously and than the gravity degree once hit door, could trigger the NE555 chip IC ₅) when the N555 chip IC ₅After the monostable circuit of forming is triggered, by HFC5221 caution musical film IC ₆Just send " drip, drip, note " sound, also can connect other sound equipment in addition, both played the doorbell effect, serve as warning again.

(3) this burglar alarm adopts storage battery power supply, and is provided with filling soon and the trickle charge circuit of rectification charging: charging quickly route transistor BG ₁₃, BG ₁₄The constant-current source circuit of forming passes through K switch _1-1Contact is to storage batteries D C charging, because of K _1-1With K _1-2Be linked switch, K during charging quickly _1-2Disconnect, alarm is not worked; Charging battery route three-terminal voltage-stabilizing chip 7812 and K _1-2Form, at this moment K _1-1Disconnect alarm work or power switch K ₂During disconnection, the trickle charge circuit continues charging to accumulator, when accumulator is charged to 13V, because of the output voltage of 7812 chips equates with accumulator voltage, and stops to charge, not the phenomenon that can occur overcharging.

The switching on and shutting down process: during start, the external power switch K that is contained in the shelter closes ₂, piezoelectric ceramic piece Y in this opportunity ₁Send the permission detection signal sound in 30 seconds, in this time, the start people should be on door or the window closed, magnetic switch tongue tube closure at this moment, piezoelectric ceramic piece Y ₁Sound one stops, and alarm is just devoted oneself to work.When owner goes home, open door, the magnetic switch tongue tube disconnects, and alarm is delayed time and is prepared for 8 seconds to report to the police, and needs only in this 8 paper money clock time power switch K ₂Disconnect, alarm just can not reported to the police, if the thief pries open door, because of can't find the power switch K in shelter in 8 seconds ₂, alarm will send loud and clear chimes of doom.

The utility model has the advantages that; 1. because the switch of this circuit is received comparator input terminal after adopting mechanical magnetic switch and the parallel connection of electronic switch controllable silicon, therefore can overcome the unreliable defective that causes misoperation easily of warning circuit work in the past, make alarm work reliable and stable.2. also designed vibration transducer because of this circuit, and circuit such as amplification, buffering, power amplifier, can make when knocking at the door, alarm will send state's language of " drip, drip, note ", other sound equipment of may command also, not only caution sound can produce threat to the thief, also can cause the illusion that the people is arranged within doors, makes the thief dare not continue to force open the door.3. after door, window are pried open, do not report to the police in 8 seconds, so that allow owner turn off power switch, if not owner, alarm will send loud and clear chimes of doom after 8 seconds, and the masses around allowing come out to stop thief.When alarm sound can stop automatically after 30 seconds reporting to the police, in order to avoid influence the life of surrounding resident.After door, window being shut, alarm can continue again to devote oneself to work, and plays the effect that keeps the scene intact again.4. because of this circuit adopts storage battery power supply, and have and fill soon and two kinds of circuit that utilize rectification charging of trickle charge, so the influence that this alarm is not had a power failure is not afraid of the thief yet and is cut off alternating current earlier and steal continuous working incessantly again.5. this alarm is simple in structure, makes easily, and element is cheap, and therefore, cost is low, is fit to places such as family, warehouse, shop, office and uses.

Below in conjunction with accompanying drawing, this burglar alarm circuit is done further narration;

Fig. 1 is a structural representation block scheme of the present utility model.

Fig. 2 is circuit theory diagrams of the present utility model.

Fig. 3 is the wiring layout of circuit board of the present utility model.

With reference to annex; Circuit diagram shown in 2 is made the printed circuit board (PCB) as Fig. 3 with reference to the accompanying drawings, and the corresponding components and parts of burn-oning, attaching voltage table, K switch on the panel of burglar alarm casing ₁, binding post and potentiometer, on the back plate of casing, load onto piezoelectric ceramic piece Y ₁, triode DD ₀₁, BG ₁₃And binding post.

The course of work of this circuit is such;

1, power switch K ₂After closing, because IC ₃2 pin of NE555 are connected to capacitor C ₅So this point voltage is a low-voltage in the moment of starting shooting, IC ₃Just output HIGH voltage of 3 pin, transistor BG ₃Its current collection of conducting is low-voltage very, so triode BG ₄Not conducting, controllable silicon VS ₂At this moment because of the not conducting of triggerless voltage, comparer IC ₁LM358, power amplifier piece IC ₇The last equal no-voltage of TDA2003 and not working.Monostable circuit IC ₃Resistance R is passed through on another road of voltage of 3 pin output ₁₅, R ₁₆After the dividing potential drop, give warning musical film IC ₄9561 provide a voltage, IC ₄Start working, its output stage passes through resistance R ₁₇Promote triode BG ₅Work, so, piezoelectric ceramic piece Y ₁Just sent slight police car signal sound, so that self check.

As monostable circuit IC ₃After the transient state time end in 30 seconds, the just no-voltage output of 3 pin, at this moment triode BG ₃End BG ₃Collector becomes high voltage, voltage stabilizing diode DW ₃Very fast breakdown, therefore, triode BG ₄Controllable silicon VS is given in conducting ₂The control utmost point provides a trigger voltage, controllable silicon VS ₂Just conducting, the voltage on the negative electrode are added in magnetic switch JK, comparer IC respectively ₁, power amplifier IC ₇On, whole loom is made state on just having entered.

2, when the people knocks at the door, piezoelectric ceramic piece Y ₂On just produced an electric signal, by transistor BG ₆, BG ₇, BG ₈After the amplification, make transistor BG ₉Conducting, and pass through resistance R ₂₈To capacitor C ₁₃Charging is when charging voltage is higher than voltage stabilizing diode DW ₃Breakdown reverse voltage after (this place is chosen to be 2.5V), transistor BG ₁₁Conducting low-voltage occurs on its collector, thereby has triggered monostable circuit NE555 chip IC ₅Make it to become temporary stable state by stable state, 3 pin are output HIGH voltage just, and this voltage is divided into four the tunnel and walks;

The first via is by diode D ₄Negative pole arrives diode D ₁Negative pole, thus make relay K A ₁Line is surrounded by electric current by working power amplifier chip block IC ₇5 pin obtained voltage and just started working.

The secondary route resistance R ₃₃Be added in triode BG ₁₂On the base stage, thus relay K A ₂Line is surrounded by electric current by working relay K A ₂Normal opened contact make gauge tap usefulness, other sound equipment of may command.

Third Road is by resistance R ₃₄, R ₃₅After the dividing potential drop, give caution musical film HFC5221IC ₆Provide the voltage of a 2V to make its work, output stage passes through capacitor C ₁₈Be added in the power amplifier chip IC ₇On 1 pin, make it send the caution sound of " drip, drip, note ".

The 4th routing resistance R ₃₂, D ₃Give capacitor C ₁₆Charging, when voltage reaches 0.7V, triode BG ₁₀Conducting, capacitor C ₁₃On voltage bled off, with bonding steady-state circuit IC ₅Change stable state over to by temporary stable state reliably.

3, after Dang Men was opened, magnetic switch JK was often become by closure and opens comparer LM358IC ₁3 pin have just obtained the voltage of a nearly 12V, and so the 6V voltage height of these voltage ratio 2 pin is IC ₁1 pin just has voltage output, makes triode BG ₁Conducting.BG ₁Collector voltage is a low-voltage by high-voltage variable at once, thereby has triggered monostable NE555IC ₂Make it transfer temporary stable state to by stable state, 3 pin are just exported a high voltage, pass through resistance R ₇Give capacitor C ₄C is worked as in charging ₄On voltage reach voltage stabilizing diode DW ₁Breakdown reverse voltage after (being chosen to be 6V herein), triode BG ₂Conducting, BG ₂Emitter has obtained a voltage, and this voltage is added in controllable silicon VS ₁Make its conducting, IC in the control extremely ₁Voltage on 3 pin becomes 0.7V by 12V makes IC ₁The output of 1 pin no-voltage just can be closed chimes of doom.Triode BG ₂Collector voltage is by high step-down after the conducting, thereby triggered monostable circuit NE555 chip IC ₃, make it become temporary stable state by stable state, 3 pin just have high voltage output, and this voltage divides 3 the tunnel to walk:

The first via is by diode D ₁, resistance R ₄₄Arrive triode BG ₁₅Base stage makes its conducting, relay K A ₁Line is surrounded by electric current by working power amplifier chip block IC ₇5 pin have had voltage just to start working.

The secondary route resistance R ₁₁Be added in triode BG ₃Make its conducting on the substrate, because controllable silicon VS ₂Conducting, at this moment BG ₃Conducting to VS ₂Inoperative.

Third Road is by resistance R ₁₅, R ₁₆Be added in warning musical film IC after the dividing potential drop ₄On make it obtain the voltage of a 5V and work, its output stage is leaded up to capacitor C ₁₇Be added in power amplifier chip block IC ₇On 1 pin, make it send chimes of doom; Resistance R is passed through on another road ₁₇Be added in triode BG ₅Make its work on the base stage, piezoelectric ceramic piece Y ₁Send slight alarm signal bugle call equally.

Claims

1, burglar alarm, by switch and comparer, delay trigger circuit, monostable circuit, warning musical film, vibration transducer, amplifier, impact damper, caution musical film, power amplifier, power supply and start time-delay output circuit are formed, and it is characterized in that: the input end that inserts comparer IC1 after described switch adopts magnetic switch JK and electronic switch controllable silicon VS1 is in parallel; Delay trigger circuit is by NE555 chip IC 2 and resistance R 7, and capacitor C 4, voltage stabilizing diode DW1 form; Start time-delay output circuit is by resistance R 100, the capacitor C 6 of NE555 chip IC 3 and input termination thereof, C5, the compositions such as transistor BG3, BG4 controllable silicon VS2 of IC3 output termination, the emitter of controllable silicon VS2 is connected to magnetic switch, on the KA1-1 of comparer and power amplifier IC7; The output terminal of IC3 is connected to divider resistance R15R16 and warning music chip IC 4, and the output terminal of this Music Clip is connected to piezoelectric ceramic chip Y1 through the base stage that R17 is connected to transistor BG5 on the BG5 collector.

2, burglar alarm according to claim 1, it is characterized in that: described vibration transducer adopts piezoelectric ceramic piece Y2 such as sponge substrate to make, its output electric signal, via transistor BG6, the amplifying circuit that BG7, BG8 etc. constitute, behind the monostable circuit that impact damper of being made up of transistor BG9, resistance R 28, R29, capacitor C13 and voltage stabilizing second tube sheet DW3 and NE555 chip IC 5 are formed, send alarm sound by HFC5221 caution music chip IC 6.

3, burglar alarm according to claim 1 and 2, it is characterized in that: described power supply adopts storage battery power supply, and be provided with filling soon and the trickle charge circuit of rectification charging, charging quickly route transistor BG13, BG14 forms constant current source and by the K1-1 make and break contact storage batteries D C is charged, and charging battery route three-terminal voltage-stabilizing chip 7812 and K1-2 form.