CN203433614U - Double precaution automatic control anti-theft device - Google Patents

Abstract

A double precaution automatic control anti-theft device belongs to the technical field of automatic control and comprises a precaution signal acquisition slice, a precaution electronic circuit, a caution start unit, an on-site caution system, and an information processor. The caution start unit is composed of a reed switch, a lock hole switch and a multi-code transmitting circuit, wherein the precaution signal acquisition slice is mounted on a door lock hole and cover the lock hole and the lock hole switch, and when a theft commits crimes, a touch signal is immediately generated when the theft's hand touches the precaution signal acquisition slice, the precaution electronic circuit and the on-site caution system are started to sent out a precaution information, and if the theft does not stop committing crimes, an on-site caution is generated by triggering the on-site caution system regardless of the committing way of the theft such as breaking into houses or unlocking the lock hole, and simultaneously non-interfered multi-code transmitting circuit is started to send out a caution signal, and then the information processor notifies the correlative person outside. The performance of the anti-theft products is furthermore improved, the caution is advanced, and the anti-theft effort is reinforced.

Description

Anti-theft device is controlled in two pre-warnings automatically

Technical field

Belong to electronic technology field.

Background technology

Anti-theft safety door is in society, to can use the most general security personnel's equipment.It is born stranger is stopped to the most basic function outside room, but in the modern life, outside young man will be operated in, the old men often go out to lie fallow, therefore usually unmanned in family.This situation may appear at a lot of families of community, so just there will be a new problem, if have people to commit a crime to antitheft door in family, oneself is not known, and neighbours does not likely know, how this obviously, by the leak becoming on security personnel, makes up this leak, obviously becomes security personnel's a difficult problem.

Allow household learn outside thing in family, can't do without far distance controlled, far distance controlled will be used radio remote control technology, in society, remote control electrical appliance product is more and more, just formed interference source, and telecontrol engineering in the present invention needs when busy in very high sensitivity guarantee man to notify in time personnel outside, therefore will use what kind of telecontrol engineering could improve sensitivity, make signal transmission accurate, this is a difficult problem.

Exactly because these above-mentioned problems, make antitheft series products all exist such-and-such problem, make antitheft series products get a promotion, and also require further study always.

Summary of the invention

Main task of the present invention and object are to make full use of the existing patent of inventor and technological achievement, a kind of new technical measures are proposed again, make it to produce a kind of new Security System, be characterized in when having crime behavior, the personnel outside of announcement initiatively immediately, crime behavior is proposed to warning immediately simultaneously, thereby security apparatus function is advanced.

The technical solution used in the present invention is:

1, two pre-warnings are automatically controlled anti-theft device and are taken out sheet by early warning signal, early warning electronic circuit, and warning start unit, onsite alarming system, message handler form jointly.

Wherein: warning start unit is that dry-reed tube switch, lockhole switch and multi-code transmitter circuit form jointly.

Dry-reed tube switch is positioned on door and doorframe junction, dry-reed tube switch contact is drawn and is connected in onsite alarming system and multi-code transmitter circuit with wire, magnet segment is fixed on doorframe, and its position is position the shortest with dry-reed tube switch distance after door and doorframe closure.

Lockhole switch is arranged on lockhole top, and early warning signal takes out sheet below, and early warning signal takes out the button that sheet is positioned on rear compressing lockhole switch on door lock hole, with wire, the contact of lockhole switch is drawn, and is connected in onsite alarming system and multi-code transmitter circuit.

Multi-code transmitter circuit is to connect respectively a plurality of phase inverters correspondence with it with a plurality of outputs of transmitting programme control circut, the chip select end that connects respectively polylith coding integrated circuit with the output of each phase inverter, the positive pole that connects respectively a diode with the output of polylith coding integrated circuit, the negative pole of a plurality of diodes links together, after a resistance series connection, be connected to the base stage of modulating three utmost points in transmitter unit.

Message handler, by radio system, receives programme control circut, and receiving interface circuit and telephone alarm form jointly.

Telephone alarm is to draw 4 groups of totally 8 lead-in wires from a telephone set dialing button printed panel Copper Foil matrix, wherein the termination, one side of first group two lead-in wires is connected with corresponding two Copper Foils of hands-free button, the termination, one side of two lead-in wires of second group is connected with corresponding two Copper Foils of storage one key, the termination, one side of two lead-in wires of the 3rd group two Copper Foils corresponding with storing two keys are connected, the termination, one side of two lead-in wires of the 4th group is connected with corresponding two Copper Foils of storage triple bond, and outwards export another termination of 4 groups of all 8 lead-in wires.

Receiving interface circuit unit is that the tip side of inner 4 electronic switches of interface integrated circuit connects 4 groups of 8 lead-in wires that drawn from telephone set pad, and the control end of inner 4 electronic switches of interface integrated circuit connects 4 outputs that receive programme control circut.

Radio system is, by the radio reception channel module of orthogonal shape, to receive external antenna and decoding integrated circuit and jointly form.

External antenna is welded on radio reception channel module input end, and radio reception channel module output terminal is inputted and is connected mutually with decoding integrated circuit, and the output of decoding integrated circuit is connected with the input of reception programme control circut.

It is that a sheet metal is positioned on top, door lock hole that early warning signal takes out sheet, and the lockhole switch in lockhole and alarming starter is covered completely; On early warning signal taking-up sheet, weld a wire and draw, be connected on early warning electronic circuit.

Early warning electronic circuit is the normal phase input end that early warning signal is incorporated into first order operational amplifier, the negative phase end of first order operational amplifier is connected a gain adjusting resistance with the output of first order amplifier, the output of first order amplifier is connected to the normal phase input end of second level amplifier, comparison bleeder circuit by two resistance series connection, two resistance series connection points connect the negative phase end of second level amplifier, bleeder circuit one end line of starting to exchange fire, other end ground wire, the output of second level amplifier be the output of early warning electronic circuit, is connected in onsite alarming system.

Onsite alarming system is the positive terminal that operational amplifier is received in the output of pronunciation sheet, the end of oppisite phase ground connection of operational amplifier, the output of operational amplifier has connect two-way, one tunnel has connected one end of audio frequency adjusting resistance, the audio frequency adjusting resistance other end connects audio frequency and adjusts electric capacity, and audio frequency is adjusted electric capacity other end ground connection, and another road has connected the positive pole of commissure electric capacity, commissure electric capacity negative pole is extremely connected with one of loudspeaker, another utmost point ground connection of loudspeaker.

2, the loudspeaker in onsite alarming system is that power is the internal magnetization loudspeaker of 0.5W.

3, two resistor powers in the comparison bleeder circuit in early warning electronic circuit are 1/8th watts.

4, receiving external antenna is sucker antenna.

5, the coding integrated circuit in multi-code transmitter circuit is three.

6, lockhole switch is travel switch.

For having a clear understanding of the meaning of the technical program, first will make the following instructions:

Present inventor is studied to antitheft door, and present stage is open the door without mechanical key, but adopt wireless remote control method to open the door, and the lockhole opening the door with mechanical key to be only a kind of backup, when breaking down, just enables, so lockhole can seal.

For this reason, the existing meaning to each technical measures of the present invention, concrete condition is further explained as follows:

One, the present invention design is that a kind of band has levels and has the alarm of several functions.

Its first function is those people that may commit a crime of warning, this function is exactly: when the hand of crime rigidly connects, touch above lockhole after cover plate, sound system will send pre-warning, this warning is more neutral, as the sound can send " please noting ", or the language such as " please not staying at this " prevents, by the benefit one of " neutrality " language, be impossible to being not intended to person, damage, because do not send excessive language.

The 2nd, to criminal, but can cause very large psychological pressure, the generation of its such warning of reason can make him know clearly, early has preparation in room, if continued, must there is " below " waiting for, by having thereby hinting obliquely at later risk and difficult, produce and halt the idea into very wise move at this point.

So played the initiatively effect of protection.

The 3rd, this warning can more or not cause in terror neighbours, so the problem that scientifically technical solution background proposes.

Two, the principle that pre-warning produces is: when criminal's hand touches after the signal leading sheet of lockhole top, just be imported in the in-phase end of operational amplifier of the first order and amplify, being input to again afterwards comparison amplifier further amplifies, this have a very large gain, can fully guarantee sensitivity and the reliability of pre-alarm signal.

Its reason is in this circuit, the resistance of first order operational amplifier (in accompanying drawing 1 103) can be adjusted the gain of this grade flexibly, and the divider resistance ratio (106 in accompanying drawing 1) of adjusting the comparison amplifier end of oppisite phase that second level operational amplifier forms can be adjusted again the gain of this grade flexibly.

Three, the principle of alarming starter is: when there being people to force open the door by barbarous mode, door is subjected to displacement with doorframe, be contained in door and the dry-reed tube switch of doorframe junction because of magnet away from and contact is changed, send warning initiating signal, lockhole switch is mainly the criminal for the pre-warning of not preventing, if think formal damage lock port lid, while entering house by cracking lockhole, to send out and displacement by the shift knob of lockhole cover plate (being also that early warning signal takes out sheet) lower compression, and send the signal of formal warning, because alarming starter has been connected in onsite alarming system, so after having had signal, onsite alarming system can start immediately sends chimes of doom, start wireless remote control radiating circuit simultaneously and send alerting signal.

Four, the significance of having implemented multi-code transmitter in technical scheme 1 is to be difficult for producing malfunction.Use now the apparatus of remote control many, as locking that car door is protected, with release etc., all want straighforward operation, just formed possible interference source.And adopt the many yards of artificial interferences that just can thoroughly stop afterwards this class.

Its principle that realizes multi-code transmitter is; When the first end of transmitting programme control circut is exported a high position, it is low that the phase inverter output connecting makes the chip select of this coding integrated circuit of connected, this chip select work of institute, and remaining sheet is not worked.Be output as when high when second, in like manner only have corresponding section's chip select work.Due to each coding integrated circuit with or a door mode be input to modulator tube, so form the form of multi-code transmitter.

Five, in the common communication telephones in market, generally all have a number storage function, it is easy to use that telephone set designs the telephone number that is with often puts through of argument of this function, its reason is if be stored in after the storage key in telephone set often dialling plane No. code in advance, putting through while often dialing, a plurality of keys should be dialled and the mode of the code of long number could be transferred to, become and only press the simple and direct form that a key just can be transferred to multidigit number, thereby use very convenient, because there is such characteristic, thereby created important prerequisite for receiver section implementing measure of the present invention, the present invention utilizes this characteristic exactly, in advance in phone, all telephone numbers of litigant have within doors been stored, radio system is received after the alerting signal that multi-code transmitter sends, started reception programme control circut, with it, replace traditional manual dial's mode, this also becomes the important foundation of phone transmission of information for the present invention.

In signal conditioning package, have two kinds of electronic circuits, a kind of is radio reception circuit, and the wireless remote control that its energy reliable reception sends from user transmits; Another kind is to receive programme control circut, connects the extension line from telephone key rosette copper paper tinsel, allows the number of storing in telephone set transfer to successively.

Adopt 4066 as telephone set lead-in wire and the interface circuit of reception program control circuit, to be connected with following benefit:

The one, volume is little, because just include 4 electronic switches for one 4066, thereby same function can only just can complete compared with the integrated circuit of small size with one, because reception program control circuit is to be contained in telephone set, obvious whole printed circuit board area is less, is conducive to install.

The 2nd, when reception program control circuit is not worked, the electronic switch of 4066 IC interiors is not worked, and the extension line of telephone set does not produce any negative interaction to telephone set, and telephone set can normal talking.And in reception program control circuit when work, produces correct logic to telephone set.

Six, between radio system and external antenna, adopt shielding line to be connected, can greatly improve receiving sensitivity, can largely reduce the impact of the upper various interference sources of society on remote control.

After the invention process, there is following outstanding advantage:

1, improve defence rank, more focused on the idea of putting prevention first.

The symptom of a trend that much may occur can be prevented in advance.

People's hand contact lockhole cap once there be the heart of crime, will send neutral warning language, immediately because this early warning also has distance from forcing open the door very much, so criminal is still had to very large deterrent effect.

2, having people to want to enter room by barbarous mode, door is separated with doorframe, and warning start unit also can promote onsite alarming system, sends warning.

3, do not affect neighbours's relation, do not injure person unintentionally, energy science is processed the relation of " having a mind to " and " being not intended to " behavior.

4, do not lose the due function of common alarm.

5, lockhole switch, does not need artificial additional move, and (as opened the door at every turn, closing involution behind the door), does not affect the normal habits and customs of people, thereby does not affect the normal operation of the each starting of security system.

6, after the invention process; anti-theft safety door and alarm have been realized the combination of science; the advantage that has possessed two kinds of protectors; usually both people can be kept outside the door; when running into other people and committing a crime; can send two kinds of warnings; to increasing " the initiatively protectiveness " of anti-theft safety door; (its implication is; function of the present invention will suppress crime behavior generation; and whether waiting for passively that it destroys) and be all very significant, the situation of the passive defence of anti-theft safety door so this product is through with completely, has promoted security personnel's performance of anti-theft safety door all sidedly.

7, pre-warning circuit has very high sensitivity and reliability, after debugging, is all applicable to all-environment needs, and circuit is simple, and debugging is convenient.

8, the line power of sound equipment caution system is large, simple, and debugging is convenient, power saving.

9, stopped the interference of social various electrical equipment, made signal transmission effect better.

10, advanced in performance, owing to utilizing network platform transmission of information, hurry up, and with people place range-independence, single also have following characteristics with regard to this function: (1), can call out multi-section phone simultaneously, allow a plurality of people know, the telephone alarm of having avoided a lot of other class character to report to the police can only be notified a people deficiency.

(2), each phone is repeatedly called out, can discharge many objective unfavorable factors, as the line is busy, the factor such as network signal is bad, so notify from a phone call great efforts.

(3), after closing of the circuit, not only have voice message, and can monitor acoustic scene, true feeling is strong.

(4), telephone set still has all communication functions of phone, a tractor serves several purposes, does not increase ornaments and the apparatus of family, does not affect life and the custom of family, family does not have too much ornaments and affects attractive in appearance.

Accompanying drawing explanation

Fig. 1 is that the present invention is early warning electronic circuitry.

In figure: 3, early warning signal takes out sheet lead-in wire; 102, first order amplifier positive terminal; 103, first order amplifier gain adjusting resistance; 104, first order amplifier negative phase end; 105, first order operational amplifier; 106, second level amplifier; 107, second level amplifier negative phase end; 108, second level amplifier positive terminal; 109, second level comparison amplifier divider resistance; 120, pre-warning output.

Fig. 2 is dry-reed tube switch scheme of installation.

In figure: 70, anti-theft safety door; 61, magnet segment; 62, the box of dry-reed tube switch is installed; 63, anti-theft security door frame; 65, dry-reed tube switch; 128, dry-reed tube switch extension line.

Fig. 3 is lockhole switch scheme of installation

In figure: 70, anti-theft safety door; 71, lockhole; 101, early warning signal takes out sheet; 3, early warning signal takes out sheet lead-in wire; 75, fixedly early warning signal takes out the screw of sheet; 79, the printed panel of welding lockhole switch; 119, lockhole switch; 127, lockhole switch extension line;

Fig. 4 is multi-code transmitter circuit diagram.

In figure: 601, transmitting programme control circut; 602, transmitting programme control circut the first output; 603, transmitting programme control circut the second output; 604, transmitting programme control circut the 3rd output; 605, transmitting programme control circut first the first phase inverter that output connects; 606, transmitting programme control circut second the second phase inverter that output connects; 607, transmitting programme control circut the 3rd the 3rd phase inverter that output connects; 608, first coding integrated circuit chip select end; 609, second coding integrated circuit chip select end; 610, the 3rd coding integrated circuit chip select end; 611, first coding integrated circuit; 612, second coding integrated circuit; 611, the 3rd coding integrated circuit; 614, the output of first coding integrated circuit or door; 615, the output of second coding integrated circuit or door; 616, the output of the 3rd coding integrated circuit or door; 617, current-limiting resistance; 618, modulation triode.

Fig. 5 is signal conditioning package schematic diagram.

In figure: 01, receiving antenna; 02, radio system; 03, receive programme control circut; 04, receive programme control circut the first output; 05, receive programme control circut the second output; 06, receive programme control circut the 3rd output; 07, receive programme control circut the 4th output; 09, receive the interface integrated circuit between programme control circut and telephone set; 10, Hands-free key extension line; 11, store a key extension line; 12, store two key extension lines; 13, store triple bond extension line; 14, store quadruple linkage extension line; 15, Hands-free key; 16, store a key; 17, store two keys; 18, store triple bond; 20, other useless button on keyboard; 21, telephone key dish.

Fig. 6 is the circuit interface figure between telephone key-press extension line of the present invention and program circuit.

In figure: 03, receive programme control circut; 04, receive programme control circut the first output; 05, receive programme control circut the second output; 06, receive programme control circut the 3rd output; 07, receive programme control circut the 4th output; 09, receive the interface integrated circuit between programme control circut and telephone set; 206, inner first electronic switch of interface integrated circuit 4066; 207, inner second electronic switch of interface integrated circuit 4066; 208, inner the 3rd electronic switch of interface integrated circuit 4066; 209, inner the 4th electronic switch of interface integrated circuit 4066; 10, Hands-free key extension line; 11, store a key extension line; 12, store two key extension lines; 13, store triple bond extension line.

Fig. 7 is radio system connection diagram.

In figure: 590, radio reception channel module; 591, shielding line; 592, receive external sucker antenna; 593, decoding integrated circuit; 03, receive programme control circut.

Fig. 8 is onsite alarming system circuit diagram.

In figure: 120, pre-warning output; 127, lockhole switch extension line; 128, dry-reed tube switch extension line; 197, lockhole switch connects the isolating diode of onsite alarming system; 198, dry-reed tube switch is connected to the isolating diode of onsite alarming system; 199, pre-warning output connects the isolating diode of onsite alarming; 201, pronunciation sheet; 202, enlargement factor adjusting resistance; 203, operational amplifier; 206, audio frequency adjusting resistance; 207 commissure electric capacity; 205, loudspeaker.

Fig. 9 is that each several part is related to schematic diagram.

In figure: 101, early warning signal takes out sheet; 3, early warning signal takes out sheet extension line; 119, lockhole switch; 127, lockhole switch extension line; 65, travel switch; 128, travel switch extension line; 518, warn in advance electronic circuit; 109, onsite alarming system; 186, wireless remote control transmitting; 187, signal conditioning package.

Embodiment

Fig. 1 to Fig. 9 has described specific embodiment of the invention example jointly.

One, alarming starter, early warning signal taking-up sheet, alarming starter part are installed, as Fig. 2 and Fig. 3 enforcement.

1, with a hard material, be processed into and strike out the lockhole screening glass larger than lockhole, lockhole screening glass is also the cover plate of covering lockhole.

2, the periphery at lockhole screening glass (cover plate) spiles, and the place punching that cover plate is installed at shop front lockhole is corresponding with it, the mounting hole tapping of the shop front.

4, between lockhole screening glass and door, add hollow cushion ring, allow hollow place expose lockhole.

5, lockhole screening glass is fixed in the shop front.Fixedly time, should notice between lockhole screening glass and door fixedly time that pad last layer insulant is as plastic washer.

6, with one end of a wire, connect lockhole screening glass, the other end has connected the electric bridge being positioned in door and has warned in electronic circuit in advance.

7, lockhole switch is welded on a bar printing plate, the printed panel that has welded switch is fixed on door lock hole.

8, lockhole switch contact is drawn out to and connects in multi-code transmitter circuit, onsite alarming system with wire.

9, lockhole screening glass is oppressed lockhole shift knob after fixing.

10, dry-reed tube switch is screwed in a box.

11, fixedly the box of dry-reed tube switch is screwed in door again.

12, the contact of dry-reed tube switch is drawn out to and connects in multi-code transmitter circuit, onsite alarming system with wire.

13, magnet segment is fixed on doorframe, and optimum position is place the shortest with dry-reed tube switch distance after antitheft door and doorframe closure.

Two, implement pre-warning part.

1, press Fig. 1 welding, in figure, two-stage amplification circuit adopts 324.

It is the kind of positive signal that startup or door are selected three input and output.

2, will warn in advance output is connected in onsite alarming system.

3, adjust the sensitivity of amplifier, make it to meet the requirements.

Adjust gain resistor in amplifier (in Fig. 1 109).

three, formal warning part is installed.

1, the positive pole that the extension line of travel switch and the extension line of lockhole switch is respectively connected to a diode, the negative pole of two diodes is connected together and is connected in onsite alarming system.

2, onsite alarming system is pressed Fig. 8 welding.

Four, multi-code transmitter is welded by shown in Fig. 4, with first output of transmitting programme control circut, connect first phase inverter input in integrated circuit, this phase inverter output connects the chip select end of first coding integrated circuit, the modulation output connection of this coding integrated circuit or an input of door, as method connects the output of transmitting programme control circut second, another input of this modulation output connection or door, or connect the modulation transistor base in radio transmitter circuit after the output resistance in series of door.

Five, implement signal conditioning package within doors: as shown in Figure 5.

1, with one, there are 4 telephone set transformations of storing number ability, first telephone set is taken apart, expose the printed panel corresponding with keyboard.

On two Copper Foils that when 2, Hands-free key is pressed on keyboard by wire bonds, its conductive rubber correspondence connects.

When 3, storing a key by wire bonds press on keyboard on corresponding two Copper Foils that connect of its conductive rubber.

When 4, storing two keys by wire bonds press on keyboard on corresponding two Copper Foils that connect of its conductive rubber.

When 5, storing triple bond by wire bonds press on keyboard on corresponding two Copper Foils that connect of its conductive rubber.

6,, by these 4 groups totally 8 lead-in wires, be connected to 4 electrical switch contacts ends of interface integrated circuit 4066 inside.

The control end of 4 output connecting interface integrated circuit 4066 inner 4 electronic switches 7, controlling with reception program.When connecting, Hands-free key connects the first output, and be linked in sequence first, second and third stores key later.

8, the output of radio system is connected on the starting end that receives programme control circut, as shown in Figure 7.

9, by the telephone set lid involution of dismounting.

Claims (6)

1. anti-theft device is controlled in pair pre-warning automatically, it is characterized in that: by early warning signal, take out sheet, and early warning electronic circuit, warning start unit, onsite alarming system, message handler form jointly;

Wherein: warning start unit is that dry-reed tube switch, lockhole switch and multi-code transmitter circuit form jointly;

Dry-reed tube switch is positioned on door and doorframe junction, dry-reed tube switch contact is drawn and is connected in onsite alarming system and multi-code transmitter circuit with wire, magnet segment is fixed on doorframe, and its position is position the shortest with dry-reed tube switch distance after door and doorframe closure;

Lockhole switch is arranged on lockhole top, and early warning signal takes out sheet below, and early warning signal takes out the button that sheet is positioned on rear compressing lockhole switch on door lock hole, with wire, the contact of lockhole switch is drawn, and is connected in onsite alarming system and multi-code transmitter circuit;

Multi-code transmitter circuit is to connect respectively a plurality of phase inverters correspondence with it with a plurality of outputs of transmitting programme control circut, the chip select end that connects respectively polylith coding integrated circuit with the output of each phase inverter, the positive pole that connects respectively a diode with the output of polylith coding integrated circuit, the negative pole of a plurality of diodes links together, after a resistance series connection, be connected to the base stage of modulating three utmost points in transmitter unit;

Message handler, by radio system, receives programme control circut, and receiving interface circuit and telephone alarm form jointly;

Telephone alarm is to draw 4 groups of totally 8 lead-in wires from a telephone set dialing button printed panel Copper Foil matrix, wherein the termination, one side of first group two lead-in wires is connected with corresponding two Copper Foils of hands-free button, the termination, one side of two lead-in wires of second group is connected with corresponding two Copper Foils of storage one key, the termination, one side of two lead-in wires of the 3rd group two Copper Foils corresponding with storing two keys are connected, the termination, one side of two lead-in wires of the 4th group is connected with corresponding two Copper Foils of storage triple bond, and outwards export another termination of 4 groups of all 8 lead-in wires;

Receiving interface circuit unit is that the tip side of inner 4 electronic switches of interface integrated circuit connects 4 groups of 8 lead-in wires that drawn from telephone set pad, and the control end of inner 4 electronic switches of interface integrated circuit connects 4 outputs that receive programme control circut;

Radio system is, by the radio reception channel module of orthogonal shape, to receive external antenna and decoding integrated circuit and jointly form;

External antenna is welded on radio reception channel module input end, and radio reception channel module output terminal is inputted and is connected mutually with decoding integrated circuit, and the output of decoding integrated circuit is connected with the input of reception programme control circut;

It is that a sheet metal is positioned on top, door lock hole that early warning signal takes out sheet, and the lockhole switch in lockhole and alarming starter is covered completely; On early warning signal taking-up sheet, weld a wire and draw, be connected on early warning electronic circuit;

Early warning electronic circuit is the normal phase input end that early warning signal is incorporated into first order operational amplifier, the negative phase end of first order operational amplifier is connected a gain adjusting resistance with the output of first order amplifier, the output of first order amplifier is connected to the normal phase input end of second level amplifier, comparison bleeder circuit by two resistance series connection, two resistance series connection points connect the negative phase end of second level amplifier, bleeder circuit one end line of starting to exchange fire, other end ground wire, the output of second level amplifier be the output of early warning electronic circuit, is connected in onsite alarming system;

Onsite alarming system is the positive terminal that operational amplifier is received in the output of pronunciation sheet, the end of oppisite phase ground connection of operational amplifier, the output of operational amplifier has connect two-way, one tunnel has connected one end of audio frequency adjusting resistance, the audio frequency adjusting resistance other end connects audio frequency and adjusts electric capacity, and audio frequency is adjusted electric capacity other end ground connection, and another road has connected the positive pole of commissure electric capacity, commissure electric capacity negative pole is extremely connected with one of loudspeaker, another utmost point ground connection of loudspeaker.

2. anti-theft device is controlled in two pre-warning according to claim 1 automatically, it is characterized in that: the loudspeaker in onsite alarming system is that power is the internal magnetization loudspeaker of 0.5W.

3. anti-theft device is controlled in two pre-warning according to claim 1 automatically, it is characterized in that: two resistor powers in the comparison bleeder circuit in early warning electronic circuit are 1/8th watts.

4. anti-theft device is controlled in two pre-warning according to claim 1 automatically, it is characterized in that: receiving external antenna is sucker antenna.

5. anti-theft device is controlled in two pre-warning according to claim 1 automatically, it is characterized in that: the coding integrated circuit in multi-code transmitter circuit is three.

6. anti-theft device is controlled in two pre-warning according to claim 1 automatically, it is characterized in that: lockhole switch is travel switch.

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