CN203192124U - Early warning device having large protection degree - Google Patents

Abstract

The utility model discloses an early warning device having a large protection degree belonging to the security technology field. The early warning device comprises an active lightning protection power supply, an early earning electronic circuit, an early warning signal extracting sheet, an early warning sound system, an alarming switch, and an alarming sound system. The early warning signal extracting sheet is a metal sheet, and can be used to cover the alarming switch and a locking hole. When the unexpected situation occurs, the early warning signal extracting sheet can be triggered to generated the early warning signal by being contacted, and the early warning sound system can be used to send the early warning after being pushed by the early warning electronic circuit; when the unexpected situation is not stopped, and the early warning signal extracting sheet and the door are loosened, the switch button of the alarming switch is not pressed by the early warning signal extracting sheet, the contact can be changed, and the alarming sounds can be made by the alarming sound system via the alarming starting signal. The early warning device is advantageous in that the active lightning protection power supply has the good lightning protection effect, can be adapted to a wide range of the commercial power, and the overvoltage capability is strong, and furthermore the performance of the early warning device can be enhanced.

Description

The pre-attention device that protection is big

Technical field

Belong to the safety technique field.

Background technology

No matter be family or market, door all is important security personnel's equipment, often is combined with alarm, forms active protection.

The kind of alarm is a lot of at present, but most of products all exist following deficiency: have only in flagrant delict just producing onsite alarming, so just produced the shortcoming of three aspects, the one, as long as there is the crime behavior will produce consequence, injured as door and to be made a mess of etc., the 2nd, after door is pried open, may produce the effect of further bringing out crime, though alert sound is arranged this moment, can not prevent and continue stolen possibility; The 3rd, not peaceful terrified around the onsite alarming that at this moment produces also can cause.If imagination just begins crime; just sound a warning; can not only overcome above-mentioned some deficiency; and can also produce a very big benefit be because " from succeeding " very big lead is arranged; the criminal is understood preparation is early arranged within doors; " risk " is very big, thereby can receive hand as early as possible, thereby becomes a kind of " protection initiatively ".And the product with such " initiatively protection " type also lacks very much.

Power supply is the basic element of character that electronic equipment must be equipped with simultaneously, and the quality of its performance is directly connected to the performance that is equipped with that sets.

It all is waste product that any good electronic product, supporting power supply do not pass a test, and particularly the protector series products is strict especially to the requirement of power supply, if outage, it is blank so just to have produced security personnel, and consequence is very serious.And present integrated regulator, as being the performance of representative with 78 series, its inherency of these integrated circuit exists the low weakness of input voltage, this weakness, and cause damage the easiliest, so be difficult to adapt to the requirement of second kind of electronic equipment.

Summary of the invention

Use the power supply that a kind of overvoltage capabilities is strong, have good lightning protection effect, adaptation civil power wide ranges, take full advantage of the existing patent of inventor and technological achievement, a kind of new technical measures are proposed again, be combined into a kind of novel protector product, be characterized in that the beginning of crime or preparatory stage are just being arranged, can send a kind of pre-caution immediately, prevent, better prevention effect is arranged like this, thereby enrich the new protector kind of outstanding warning performance.

The technical solution used in the present invention is:

1. the pre-attention device that protection is big is by active lightning protection power supply, the early warning electronic circuit, and early warning signal takes out sheet, warns sound system in advance, and several parts of alarm switch and alarm sound system are formed jointly.

Wherein: active lightning protection simplify power supply be civil power after the transformer rectification, formed by the triode of a voltage regulation function and controllable silicon and the related peripheral part of a defencive function again.

It is to have connected an anti-thunder tube between ground wire that output terminal after the rectification has connected three the tunnel, the one tunnel; One the tunnel is the collector that has connected a pressure regulation triode by name; One the tunnel is to have connected a resistance in the base stage of pressure regulation triode.

The emitter-base bandgap grading of pressure regulation triode has been connected behind the resistance, becomes the last output terminal of power supply.

The base stage of pressure regulation triode has also connected following three the tunnel: first branch road of base stage is to have connected a voltage stabilizing diode and resistance eutral grounding; Second branch road of base stage is the overcurrent protection branch road that has connected several diodes series connection, and base stage links to each other with this bypass diodes positive terminal, the linked to each other last output terminal of power supply of the negative pole end of diode; The 3rd branch road of base stage is to have connected a protection silicon controlled anode by name, the plus earth of protection silicon controlled.

Be connected the triggering branch road of being made up of voltage stabilizing diode between the last output terminal of power supply and protection silicon controlled control gate, wherein the positive terminal of stabilivolt has connected power output end, and cathode tube has been connected the silicon controlled control end; Be connected a resistance between SCR control grid and the ground wire.

The early warning electronic circuit is by prestage, amplifier stage, and electronic switch level three parts are formed.

Prestage is that the end with lead is connected in early warning signal and takes out on the sheet, and the other end of lead is connected on the base stage of a triode, and the collector of this triode is by on system power supply, and emitter connects the input end of amplifier stage.

Amplifier stage is made of with peripheral element jointly a plurality of not gates: link to each other with output terminal with a plurality of not gate input ends, it is the input that has connected second not gate with the output of first not gate, as the form that is connected in series of many not gates of method generation, every not gate input has been connected a resistance with output terminal; Connected the input of first not gate with the prestage transistor emitter, the output of last not gate is the output of amplifier stage.

The electronic switch level is that the input end with several not gates connects together, and becomes this input end, and several non-gate output terminals connect together, and become output terminal at the corresponding levels, and the input end of this grade is connected in the output terminal of amplifier stage, and output terminal has connected pre-caution sound system power supply.

Early warning signal takes out sheet, is made of a sheet metal, is mounted in the lockhole top.

Alarm switch is a mechanical switch, and the position of its installation is on the lockhole of the shop front, and early warning signal takes out under the sheet, with screw early warning signal is taken out sheet and is fixed on the door, and take out the button that this switch is lived in the sheet compressing with early warning signal; The power supply that has connected the alarm sound system with the contact of switch.

2. the not gate in the early warning electronic circuit adopts integrated circuit 4069.

3. the amplifier stage in the early warning electronic circuit is to be formed by two to three not gate strings, and electronic switch is that output terminal and the input end by three to four not gates connects together respectively.

4, the last output terminal at power supply is a stabilivolt with protecting the stabilivolt that is connected between the silicon controlled control gate to trigger one of branch road form in the active lightning protection power supply, the positive pole of stabilivolt has connected the last output of power supply, and the stabilivolt negative pole end has connected the SCR control grid; Two forms are a stabilivolt several the diodes of having connected, the anode of stabilivolt has connected power output end, the negative pole termination SCR control end of diode.

5, controllable silicon is one-way SCR in the active lightning protection power supply.

Now to the meaning of each technical measures of the present invention, concrete condition further is explained as follows:

One,Be the clear meaning of understanding the technical program, at first will make the following instructions: available research achievements of the present invention is, to opening the door of antitheft door, without mechanical key, but adopt the wireless remote control method to open the door, and only be a kind of backup with the lockhole that mechanical key opens the door, when breaking down, just enable, so lockhole can seal.

Two,Effect of the present invention is a kind of warning device that has level and multiple function is arranged.Be that the different triggering starting device of two covers is arranged, two kinds of different cautions, thereby produce two kinds of different effects.

First kind of level is pre-caution: fundamental purpose is to prevent the heart that crime is arranged, or firm crowd when bud.Function is after early warning signal takes out sheet above the hand when crime rigidly connects tactile lockhole, sound system will send pre-caution, this caution is than neutral, can send " please noting " as the sound, or language such as " please not staying at this " is prevented, benefit one with gender neutral language is will cause very big psychological pressure to the criminal, the 2nd, can not damage being not intended to the person, and the 3rd, more can not cause in terror the neighbours.

The protection of second level is to report to the police.Mainly be at the criminal who does not prevent the pre-caution of living, at this moment, if think formally to destroy lockhole cap, when entering house by cracking lockhole, to send out and displacement by the shift knob of lockhole cap lower compression, thereby the starting warning system will be sent chimes of doom severe and deterrent that give great volume.

Three. the principle that pre-caution produces is: touch the early warning signal taking-up sheet of aspect on the lockhole when hand after, after the base stage of touch signal process prestage emitter follower enters, the amplifier stage that enters into this grade amplifies, as behind the enough voltage, touch electronic switch at the corresponding levels (being that merit at the corresponding levels is gone into) at last and remove to promote to warn in advance acoustics circuit.

Four, all electrical equipment all need good power supply to cooperate with it, and the overcurrent protection power supply that the present invention uses is an emphasis, and the spy makes the following instructions its circuit:

1, the cardinal principle of voltage stabilizing:

Pressure regulation triode pipe has adopted to be penetrated with output, and very strong negative feedback is arranged, in case after line parameter circuit value is determined, adjust pipe and just can be stabilized on the concrete numerical value, and can satisfy the requirement of equipment.If it is littler to adjust last inclined to one side resistance R 1 design of pipe, its bearing power is also very big.

2, the reason that has good anti-thunderbolt effect: when thunderbolt is arranged, usually be that power supply is perishable the time, be that take the to cut off the power supply mode in source is avoided as common household electrical appliances, but as these class specialities of burglar alarm, it is blank to become security personnel as resolute power down source, this is an emphasis of the present invention so improve lightning protection effect, and the effect that the present invention produces is described as follows:

The first, adopt active controllable silicon to form " fast tripping protection function ", excellent performance has very strong lightning protection overvoltage capabilities.

The principle that forms is: if thunderbolt and when causing output terminal too high and surpass conducting behind the door that triggers voltage stabilizing diode (710); thereby triggering controllable silicon (711) conducting; immediately to the base stage short circuit of pressure regulation triode (703); cause pressure regulation triode (703) output voltage is closed, form lightning protection overvoltage fast tripping protection.Why be called " fast tripping protection ", in case be because output terminal when too high, controllable silicon (711) conducting has very strong positive feedback, can form " fast tripping protection function " rapidly with the base stage short circuit of pressure regulation triode (703).And after output terminal does not have overvoltage; can not form controllable silicon (711) and trigger; because the voltage stabilizing diode (710) that triggers has " door "; become one of automatic reason of recovering of controllable silicon (711) for this reason; two be that the SCR control grid are connected to resistance to earth R4(709 over the ground); form shunting, will significantly reduce the sensitivity that controllable silicon self keeps, theoretical and test explanation; as long as it is proper that this resistance is adjusted; in case overvoltage disappears, controllable silicon will not keep the existence of electric current, and revert to off state automatically; if be struck by lightning again; starting again, form protection, is normal value until output voltage.

The second, protection controllable silicon and peripheral element formed " fast tripping protection function " is when overvoltage not; be in " open-circuit condition ", just work when needing only thunderbolt or overvoltage, so be not easy to damage; constantly all be in a kind of " backup " guard mode, strengthened the reliability of protection.

Its reason is to trigger part door is arranged, and output end voltage does not exceed door, and controllable silicon inside does not have self to keep electric current yet, and total system does not have " electrical wear ", can not damage, and becomes a kind of " backup " state.

Three, adjusting pipe is high inverse-voltage tube, and lightning protection effect is good.

Its reason is, this pipe oppositely suctions through voltage usually at hundreds of volts, and 78 serial back-pressures are generally 30 volts.To exceed more than 10 times than 78 series commonly used.

Four, be equipped with anti-thunder tube, this pipe voltage breakdown is tens of volts, after high inverse-voltage tube cooperates, thereby has very big surplus.

3, form the overcurrent protection principle: when output current is excessive; adjust the resistance R 2 pressure drops increase that the pipe emitter is connected; when surpassing certain value; diode current flow in the overcurrent protection branch road; flow into output voltage and adjust the base current minimizing of pipe; the load overcurrent is super many, and then the base current of Jian Shaoing is more many, forms automatically to exchange the homogeneous tube protection.

4, the reason that can not damage circuit in the higher place of civil power and period: be high inverse-voltage tube because adjusting pipe, although the voltage height of bridge-type output this moment, also can be far below the high inverse-voltage tube withstand voltage.

5, can be in the main cause of the lower place of civil power and period work: the one, the pressure regulation triode in the circuit can not produce the additional electrical pressure drop.(illustrate: if the raising input voltage scheme that adopts traditional triode to connect with three end integrated circuit, in order to make triode and three ends can both operate as normal, the one, go into the voltage that end is higher than output terminal for three end integrated circuit, the 2nd, be to the operating voltage of triode needs, main product has been given birth to triode supplementary loss voltage like this, and when civil power was low, this was valuable voltage.) it two is to be high inverse-voltage tube because adjusting pipe, so can design the bridge-type output voltage higherly when design, when civil power was low, at this moment bridge-type voltage can not be very low, just can do certain compensation.

6, can expand the reason of civil power variation range: owing to last two reasons, do not damage circuit when civil power is high, and still can operate as normal when low.So can expand the working range that civil power changes widely.

7, can adjust the reason of different output voltage stabilizing values.Because in reference voltage first branch road, the pressure drop of voltage stabilizing diode is leading role, so can form coarse adjustment, and the shared ratio of the resistance R of going here and there 3 is very little, so also can do the usefulness of accurate adjustment, the benefit of accurate adjustment is can the furnishing normal voltage required to the accumulator floating charge, as 6.6 volts; 12.8 volt, etc.

8, the protection silicon controlled triggers the measure reason that circuit adopts stabilivolt to connect with diode and is, is conducive to batch process because debug more convenient, and precision height.Its reason one is can be consistent with the parameters selection of base stage branch road stabilivolt the parameter value of this stabilivolt, has reduced the component kind when producing, and is convenient to buying, is convenient to produce.The 2nd, behind several diodes on the string, must the voltage stabilizing value improve several 0.7 volt, thereby in batch process, be convenient to debugging.

After the invention process, following outstanding advantage is arranged:

1, improves the defence rank, more paid attention to the idea of putting prevention first.Can prevent the symptom of a trend that much may occur in advance.The reason one that why can reach this purpose is, hand rigidly connects when touching locking closure, and (it is reported, be the main channel of committing a crime at present by cracking the lockhole crime) may be the beginning that the heart of crime has just been arranged only, if stopped crime immediately, can not produce such or such consequence.The 2nd, this caution will produce very big pressure at heart to the criminal's, because the criminal knows very well that this distance from " succeeding " is also far, if crime continues to affirm that " risk " is very big.

2, single for alarm, kept all advantages of existing warning product.

3, 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 can keep the people outside the door; when running into other people and committing a crime; can send two kinds of cautions; to increasing " the initiatively protectiveness " of anti-theft safety door; (its implication is; function of the present invention will produce the crime behavior and suppress; and whether waiting for its destruction passively) all be very significant, the situation of the passive defence of anti-theft safety door so this product is through with has fully promoted security personnel's performance of anti-theft safety door all sidedly.

4, the switch of pacifying in the measure scheme one is the key component that warning of the present invention starts, and also is a bright spot of putting of the present invention, because after the existing achievement of this part and inventor cooperatively interacts, making warning of the present invention accomplish more science, also is the place different with a lot of alarms, and its reason is:

The one, can generation not make us terrified wrong report, this is the most important.Its reason is, the door that is absent from the scene of owner is opened (opening with improper door) within doors, or opens the door by lockhole with ' key ', all is crime behaviors, and warning at this moment all is very significant.

The 2nd, very reliable, because the opening the door at closing time of normal life, do not need artificial additional move, do not influence the normal habits and customs of people, thereby do not influence the operate as normal of the each starting of security system.

5, touch early warning timberline road is sensitive and reliable, and the one, in the line owing to adopted emitter follower input, improved the input internal resistance, so touch signal is easily taked.The 2nd, the amplifying circuit of being made up of a plurality of not gates has higher enlargement factor.The 3rd, circuit is simplified, and this part adopts an integrated circuit 4069 just can implement.The 4th, power amplifier is served as by a plurality of not gates, has stronger power, and reliable.The 5th, this circuit is strong from motion tracking in addition, and pre-caution is opened automatically when hand contact lockhole early warning signal takes out sheet, closes automatically after hand leaves.

6, the advantage of overcurrent protection power supply is as follows: (1), anti-thunder and overvoltage protective property excellence.The one, because " fast tripping protection " that this protection circuit forms is highly sensitive, because controllable silicon has very strong positive feedback ability.The 2nd, protection is big, because immediately output end voltage is clamped substantially the zero, the 3rd after the controllable silicon conducting, protection system is in a kind of " backup " state when no overvoltage, can not damage the reliability height.

For above-mentioned reasons, so when thunderstorm season was worked, alarm can not quit work, guaranteed that " security personnel " do not produce blank.

(2), adapt to widely, than traditional stabilized voltage supply wideer adaptive faculty is arranged, namely be can make the electrical equipment of joining at the high local work of voltage and unlikely damage, and also can operate as normal in voltage lower place and period.

Above-mentioned 2 performances are better than three end integrated circuit circuit, also than traditional with triode connect with three ends way performance excellence many.

(3), can be used for exporting generation the voltage stabilizing value of decimal arranged, be convenient to the floating charge of accumulator science.Excellent performance has over-voltage over-current protection.Be fruitful supporting after, have good performance.And be difficult to realize with the co-design of three traditional end integrated circuit or traditional triode and three end integrated circuit.So the present invention has very strong ability to provide the auxiliary items, also can be supporting with other electronic product.

(4), active not fragile, the pressure regulation triode has adopted high back-pressure high power valve, reliability generally all is much higher than common triode.And protection tube to be controllable silicon be in open-circuit condition usually with the peripheral part that triggers, do not produce electrical wear.

(5), simple in circuits, benefit one is the reliability height, active of produce damaging is few; The 2nd, easily produce and debugging.

Description of drawings

Fig. 1 is that the present invention warns circuit diagram in advance.

Among the figure: 3, early warning signal takes out the sheet lead-in wire; 102, signal input stage emitter follower; 103, the amplifier sensitivity adjustment resistance that first order not gate is formed in amplifier stage; 105, first order not gate in amplifier stage; 107, the amplifier sensitivity adjustment resistance that the final stage not gate is formed in amplifier stage; 108, final stage not gate in amplifier stage; The 109 electronic switch level of being formed by not gate, both power amplifier levels; 111, early warning sound system.

Fig. 2 is the logical diagram of implementing measure 2 of the present invention.

Among the figure: 3, early warning signal takes out the sheet lead-in wire; 102, signal input stage emitter follower; 103, the amplifier sensitivity adjustment resistance that first order not gate is formed in amplifier stage; 104, the amplifier sensitivity adjustment resistance that second level not gate is formed in amplifier stage; 105, first order not gate in amplifier stage; 106, second level not gate in amplifier stage; 107, the amplifier sensitivity adjustment resistance that final stage (third level) not gate is formed in amplifier stage; 108, final stage not gate (third level) in amplifier stage; 109 electronic switch of being formed by not gate, both power amplifier levels; 110, another not gate of measure 3 described composition electronic switches; 111, early warning sound system.

Fig. 3 is that early warning signal takes out sheet and alarm switch is contained in lockhole top synoptic diagram.

Among the figure: 1, the antitheft shop front; 101, early warning signal takes out sheet; 3, early warning signal takes out the sheet lead-in wire; 4, early warning signal takes out the screw hole on the sheet; 5, lockhole; 6, welding is reported to the police and is opened printed panel also; 7, alarm switch; 8, alarm switch extension line; 9, on the antitheft shop front fixedly early warning signal take out the screw hole of sheet; 10, the printed panel that will weld switch is fixed on the screw on the antitheft door.

Fig. 4 is the overcurrent protection power circuit diagram.

Among the figure: 701, rectification input; 702, anti-thunder tube; 703, pressure regulation triode; 704, inclined to one side resistance on the pressure regulation triode; 705, output voltage accurate adjustment resistance; 706, output voltage coarse adjustment stabilivolt; 707, the supporting diode of overcurrent protection; 708, the supporting resistance of overcurrent protection; 709, controllable silicon self-sustaining sensitivity adjustment resistance; The triggering stabilivolt that 710, door is arranged; 711, overvoltage protection controllable silicon; 712, protection silicon controlled control gate; 715, power supply output.

Fig. 5 is measure 4 described circuit diagrams.

Among the figure: 701, rectification input; 702, anti-thunder tube; 703, pressure regulation triode; 704, inclined to one side resistance on the pressure regulation triode; 705, output voltage accurate adjustment resistance; 706, output voltage coarse adjustment stabilivolt; 707, the supporting diode of overcurrent protection; 708, the supporting resistance of overcurrent protection; 709, controllable silicon self-sustaining sensitivity adjustment resistance; The triggering stabilivolt that 710, door is arranged; 711, overvoltage protection controllable silicon; 712, protection silicon controlled control gate; 715, power supply output; 116, claim 2 proposes several diodes of increase.

Embodiment

Fig. 1 and Fig. 2, Fig. 3, Fig. 4, Fig. 5 have described concrete embodiment of the present invention jointly.

One, coupongs and the alarm switch of pre-caution are installed.

1, become the garden lid bigger than lockhole to become the coupongs of pre-caution of the present invention with a sheet metal punch process.

2, with switch, preferably pushbutton switch is welded on the bar printing plate and allows switch and printed panel become one, and draws the switch contact lead-in wire from printed panel.

3, make a call to three apertures at the periphery of the pre-coupongs of warning, corresponding with it in the punching of the lockhole installation place of the shop front, status requirement is after the coupongs of pre-caution are fixed on the shop front, can cover lockhole.The mounting hole tapping of the shop front.

4, between the sampling film gate of pre-caution, add hollow packing ring, allow hollow place expose lockhole.

5, the coupongs that will warn in advance are fixed on the shop front.With screw early warning signal is taken out sheet and be fixed on the door, fixedly the time, early warning signal takes out the button that sheet should tightly be pushed down switch.

Two, implement pre-caution part.

1, select for use 4069 integrated circuit as active of not gate.

2, weld pre-caution amplifier section according to Fig. 2.

3, the early warning signal of lockhole is taken out sheet and connect lead-in wire, the other end of this lead-in wire is connected on the base stage of early warning amplifying circuit emitter follower.

4, the electronic switch both output terminal of power amplifier level is welded on the power supply of gender neutral language.

Three, implement the warning part.

The lead-in wire of alarm switch is connected on the electronic switch of alarm sound.

Four, implement the overcurrent protection power supply:

1, press the selected triode of Fig. 4 or Fig. 5, anti-thunder tube, diode and resistance, wherein triode is selected high back-pressure high power valve, and as 3DD15, anti-thunder tube voltage breakdown parameter should be selected and be lower than triode back-pressure value, and the controllable silicon menu is to the controllable silicon class.

2, press the wiring diagram welding of Fig. 4 or Fig. 5.

3, adjust the power supply output valve.Adjusting pipe base stage stabilivolt value namely is the coarse adjustment of output voltage, uses the resistance of going here and there as accurate adjustment, its rule be the stabilivolt value more high output voltage is more high, resistance is more big, output voltage is more high, otherwise more low.

4, adjust the overvoltage protection parameter.

(1), with the oscillographic source of stable pressure output terminal that is connected on, click rectifier terminal with 100 volts DC voltage, oscillograph shows that output reduces to zero substantially by normal voltage, otherwise voltage stabilizing value that should regulating silicon controlled triggering voltage stabilizing diode.

(2), 100 volts the DC voltage of breaking, oscillograph shows that output end voltage is normal, if the undesired resistance to earth of just adjusting protection SCR control grid.

Claims (5)

1. the big pre-attention device of protection is characterized in that: by active lightning protection power supply, and the early warning electronic circuit, early warning signal takes out sheet, warns sound system in advance, and several parts of alarm switch and alarm sound system are formed jointly;

Wherein: active lightning protection simplify power supply be civil power after the transformer rectification, formed by the triode of a voltage regulation function and controllable silicon and the related peripheral part of a defencive function again;

It is to have connected an anti-thunder tube between ground wire that output terminal after the rectification has connected three the tunnel, the one tunnel; One the tunnel is the collector that has connected a pressure regulation triode by name; One the tunnel is to have connected a resistance in the base stage of pressure regulation triode;

The emitter-base bandgap grading of pressure regulation triode has been connected behind the resistance, becomes the last output terminal of power supply;

The base stage of pressure regulation triode has also connected following three the tunnel: first branch road of base stage is to have connected a voltage stabilizing diode and resistance eutral grounding; Second branch road of base stage is the overcurrent protection branch road that has connected several diodes series connection, and base stage links to each other with this bypass diodes positive terminal, the linked to each other last output terminal of power supply of the negative pole end of diode; The 3rd branch road of base stage is to have connected a protection silicon controlled anode by name, the plus earth of protection silicon controlled;

Be connected the triggering branch road of being made up of voltage stabilizing diode between the last output terminal of power supply and protection silicon controlled control gate, wherein the positive terminal of stabilivolt has connected power output end, and cathode tube has been connected the silicon controlled control end; Be connected a resistance between SCR control grid and the ground wire;

The early warning electronic circuit is by prestage, amplifier stage, and electronic switch level three parts are formed;

Prestage is that the end with lead is connected in early warning signal and takes out on the sheet, and the other end of lead is connected on the base stage of a triode, and the collector of this triode is by on system power supply, and emitter connects the input end of amplifier stage;

Amplifier stage is made of with peripheral element jointly a plurality of not gates: link to each other with output terminal with a plurality of not gate input ends, it is the input that has connected second not gate with the output of first not gate, as the form that is connected in series of many not gates of method generation, every not gate input has been connected a resistance with output terminal; Connected the input of first not gate with the prestage transistor emitter, the output of last not gate is the output of amplifier stage;

The electronic switch level is that the input end with several not gates connects together, and becomes this input end, and several non-gate output terminals connect together, and become output terminal at the corresponding levels, and the input end of this grade is connected in the output terminal of amplifier stage, and output terminal has connected pre-caution sound system power supply;

Early warning signal takes out sheet, is made of a sheet metal, is mounted in the lockhole top;

Alarm switch is a mechanical switch, and the position of its installation is on the lockhole of the shop front, and early warning signal takes out under the sheet, with screw early warning signal is taken out sheet and is fixed on the door, and take out the button that this switch is lived in the sheet compressing with early warning signal; The power supply that has connected the alarm sound system with the contact of switch.

2. the big pre-attention device of protection according to claim 1 is characterized in that: the not gate employing integrated circuit 4069 in the early warning electronic circuit.

3. the big pre-attention device of protection according to claim 1, it is characterized in that: the amplifier stage in the early warning electronic circuit is to be formed by two to three not gate strings, electronic switch is that output terminal and the input end by three to four not gates connects together respectively.

4. the big pre-attention device of protection according to claim 1, it is characterized in that: the last output terminal at power supply in the active lightning protection power supply is a stabilivolt with protecting the stabilivolt that is connected between the silicon controlled control gate to trigger one of branch road form, the positive pole of stabilivolt has connected the last output of power supply, and the stabilivolt negative pole end has connected the SCR control grid; Two forms are a stabilivolt several the diodes of having connected, the anode of stabilivolt has connected power output end, the negative pole termination SCR control end of diode.

5. the big pre-attention device of protection according to claim 1, it is characterized in that: controllable silicon is one-way SCR in the active lightning protection power supply.

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