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CN204511220U - A kind of monitor-type early warning type electronic anti-theft safety door - Google Patents

A kind of monitor-type early warning type electronic anti-theft safety door Download PDF

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Publication number
CN204511220U
CN204511220U CN201420830428.4U CN201420830428U CN204511220U CN 204511220 U CN204511220 U CN 204511220U CN 201420830428 U CN201420830428 U CN 201420830428U CN 204511220 U CN204511220 U CN 204511220U
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circuit
connects
triode
voltage
diode
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不公告发明人
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Chongqing Ninglai Science and Trade Co Ltd
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Chongqing Ninglai Science and Trade Co Ltd
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Abstract

A kind of monitor-type early warning type electronic anti-theft safety door, belong to an industry technical field, again propose new technical measures, monitor is allowed to be used among family, allow machinery with electronics perfect adaptation, the float charger be integrated by monitor set and voltage stabilizing, touch sheet, lockhole switch, signal amplification circuit, shoot with video-corder circuit, on-the-spot warning circuit, remote annunciator forms jointly, while hand takes off touch sheet, the touch signal produced is after signal amplification circuit amplifies, start on-the-spot warning circuit and shoot with video-corder circuit, shoot with video-corder before forming warning and case, as continued to crack lockhole, touch sheet loosens, lockhole switch starts warning immediately, start on-the-spot warning circuit and shoot with video-corder circuit, start remote annunciator simultaneously and notify related personnel in time, coordinate a kind of anti-overflow overvoltage capabilities strong, arrange standby or power supply itself and occur short trouble, when there is overvoltage or overcurrent, the float charger that the monitor set that can initiatively point out and voltage stabilizing are integrated, anti-theft safety door is more fully protected.

Description

A kind of monitor-type early warning type electronic anti-theft safety door
Technical field
Belong to an industry technical field.
Background technology
Society is improving, and science is developing, the work that anti-theft technique also wants continuous innovative ability to allow people feel at ease, relieved leisure.
Power supply is the basis of electronic device works stable performance, particularly alarm device, it can not, because of being thundery sky, be afraid of to be struck by lightning and power-off, can not work because of the instability of civil power, more can not because of power failure not alarm, therefore, power supply account for crucial position in alarm device, that supply voltage will be stablized to the requirement one of power supply, show different locations, civil power height is different, and now supply voltage is stable very important; Two is that over-current over-voltage protection is very important, if arrange standby short circuit or the thundery sky of there occurs and be subject to be struck by lightning and produced and gush pressure, cause voltage to raise suddenly; electric current surges, now not only arrange standby can damage, power supply is also fragile; so for antitheft series products, the lifting of power supply is crucial.
Because remaining incessant after repeated prohibition of theft, therefore antitheft apparatus is also in continuous increase, wherein video recorder is also one of broad-spectrum equipment, video recorder is the process can recording event generation, time etc., be convenient to situation about afterwards understanding at that time, but present video recorder is not also suitable in general family, family is different from market, there is no so much stream of people, if open video recorder for a long time, seem and waste resource very much, and check also inconvenient afterwards, thus, which type of method video recorder could be allowed to be useful among general family by, this is also a key.
In sum, antitheft series products also needs further innovating and developing, just can be adapted to society, also will continue the research of antitheft series products.
Summary of the invention
Main purpose of the present invention again proposes new technical measures, allow monitor be used among family, allow machinery and electronics perfect adaptation, while hand takes off lockhole cap, just produce pre-warning, crime is prevented before generation, as further committed a crime, more can produce formal warning, coordinating a kind of anti-overflow overvoltage capabilities strong, arrange standby or power supply itself and occur short trouble, when there is overvoltage or overcurrent, the power supply that can initiatively point out, allows the performance of antitheft series products improve further.
The technical solution used in the present invention is:
1, a kind of monitor-type early warning type electronic anti-theft safety door be integrated by monitor set and voltage stabilizing float charger, touch sheet, lockhole switch, signal amplification circuit, shoot with video-corder circuit, on-the-spot warning circuit, remote annunciator form jointly.
Wherein: the float charger that monitor set and voltage stabilizing are integrated by rectification circuit, anti-thunder tube, voltage stabilizing Circuit tuning, overvoltage crowbar, current foldback circuit and monitoring means, discharge and recharge electronic switching circuit, balance diode and jointly form.
Rectification circuit is that rectification two commutation diode series connection become a branch road, article two, the positive pole of branch road links together becomes the minus earth line of rectification, article two, the negative pole propped up links together, become rectification output cathode and rectification output, civil power enters the rectification input i.e. series connection contact of the commutation diode of two branch roads after capacitance decompression.
Voltage stabilizing Circuit tuning: rectification exports and connects a rectification output capacitance over the ground, the colelctor electrode of voltage stabilizing adjustment triode is connected to rectification and exports, on voltage stabilizing adjustment triode, resistance termination connects the base stage of voltage stabilizing adjustment triode partially, another termination connects the positive pole of diode in overvoltage crowbar, the base stage of voltage stabilizing adjustment triode be connected to by the adjustable voltage stabilizing branch road of voltage coarse adjustment diode and voltage accurate adjustment resistant series to, the emitter stage of voltage stabilizing adjustment triode has been connected a termination of overcurrent protection resistance, another termination of overcurrent protection resistance connects positive pole and the floating charge output point of balance diode, the negative pole of balance diode becomes output voltage terminal.
Overvoltage crowbar: be made up of resistance inclined in overvoltage protection diode and overvoltage protection, on overvoltage protection, inclined resistance one connects rectification output cathode, and the positive pole of a connection diode, the negative pole of diode is received in adjustable voltage stabilizing branch road.
Current foldback circuit and monitoring means: the emitter stage of overcurrent protection triode is connected to the base stage of voltage stabilizing adjustment triode, the base stage of overcurrent protection triode connects the positive pole of balance diode, the colelctor electrode of overcurrent protection triode connects two-way, and a road is that connection indication light pipe is to ground; Another road has connect one piece of deictic word tablet over the ground.
Discharge and recharge electronic switching circuit: exported control diode jointly formed by electronic switching tube, battery, charge protection resistance, base stage controlled resistor, rectification.
The emitter stage of electronic switching tube connects a charge protection and hinders on floating charge contact; the emitter stage of electronic switching tube is also connected to battery; the controlled resistance of base stage of electronic switching tube receives ground; rectification exports the positive pole controlling diode and is connected on rectification output cathode; rectification exports the base stage that the negative pole controlling diode connects electronic switching tube; colelctor electrode and the output voltage terminal of discharge and recharge triode link together, and namely combined-voltage exports.
One end of anti-thunder tube is received rectification and is exported, other end grounding wire.
Touch sheet is that one piece of sheet metal is made, larger than lockhole, is arranged on above door lock hole, is covered by lockhole switch together with lockhole, and a touch sheet wire is drawn, the base stage of preposition triode in connection signal amplifying circuit.
Signal amplification circuit is made up of enlarge leadingly triode, phase inverter, control triode, driving relay.
The base stage of enlarge leadingly triode in the lead-out wire connection signal amplifying circuit of touch sheet, the combined-voltage that the colelctor electrode of enlarge leadingly triode connects the float charger that monitor set and voltage stabilizing are integrated exports, emitter stage connects the input of first order phase inverter, the output of first order phase inverter connects with the input of second level phase inverter, indirect first the sensitivity adjustment resistance of constrained input of first order phase inverter, second level phase inverter exports the base stage of connection control triode, indirect second the sensitivity adjustment resistance of constrained input of second level phase inverter, control the grounded emitter of triode, colelctor electrode connects the line bud lower end driving relay, on line bud, the combined-voltage of the float charger that termination monitor set and voltage stabilizing are integrated exports, the combined-voltage driving the constant open contact of relay to connect the float charger that monitor set and voltage stabilizing are integrated exports, normal pin contact connects on-the-spot warning circuit with shooting with video-corder in circuit as the output of signal amplification circuit and starts or one of them input of door.
Lockhole switch is first welded on a bar printing plate, the printed panel having welded lockhole switch is placed under touch sheet again, on lockhole, when under touch sheet lid, oppress the button of lock-switch, the combined-voltage of the float charger that a contact lead-out wire connection monitor set of lockhole switch and voltage stabilizing are integrated exports, and another contact lead-out wire of lockhole switch connects three tunnels, one tunnel connects the power end of on-the-spot warning circuit, and another road connects an input of shooting with video-corder startup or door in circuit; 3rd tunnel connects the remote controlled transmitting circuit in remote annunciator.
Shoot with video-corder circuit by by starting or door, electronic switch, with the rest-set flip-flop of display, time controller, manual control switch forms jointly.
A contact lead-out wire of the output of signal amplification circuit, another contact lead-out wire of lockhole switch, manual control switch, the input of receiving startup OR circuit respectively of time controller, start or door export connect electronic switch, the output photorecorder of electronic switch, the control end of time controller with the rest-set flip-flop shown.
On-the-spot warning circuit: another contact lead-out wire of lockhole switch and signal amplification circuit export the positive pole connecing an isolating diode respectively, as the power supply of on-the-spot warning circuit after the negative pole of isolating diode links together, the output of voice sheet is connected to the base stage of amplifier tube, the grounded emitter of amplifier tube, colelctor electrode is connected in the base stage of PNP triode, the base stage of PNP triode has also connect one end of load resistance, the load resistance other end connects the base stage of NPN triode, the central point that PNP triode is connected with NPN transistor emitter is contacted a commissure electric capacity, one end of another termination loudspeaker of commissure electric capacity, the other end grounding wire of loudspeaker.
Remote annunciator is made up of remote control multi-code transmitter road and telephone alarm:
Remote control multi-code transmitter circuit is made up of radio circuit and coding circuit.
Coding circuit by launching programme control circut, phase inverter, encoding block, modulation circuit form.
Modulated resistance is by modulate or door, modulated resistance, modulating tube form.
It is the input connecting a phase inverter with the output of launching programme control circut respectively, the output of each phase inverter has connected the chip select end of a block forecast block, the output of every block forecast block connects the input of a modulation or door respectively, and the output of modulation or door is connected to modulating tube base stage in radio circuit after modulated resistance.
Radio circuit is made up of radiating circuit and copper foil antenna.
Copper foil antenna is specific English lower case N-shaped, article two, connect with arc Copper Foil kissing above vertical parallel Copper Foil, antenna Copper Foil width is 2 millimeters, the vertical parallel Copper Foil length in two, left and right is 30 millimeters, article two, the spacing of vertical parallel Copper Foil is 20 millimeters, and the height that kiss connects the arc Copper Foil of two vertical parallel Copper Foils is 4.5 millimeters.
Radiating circuit: one end of copper foil antenna is input, i.e. power firestreak end, the live wire of coding integrated circuit is connected on power supply, the input of another contact lead-out wire connection copper foil antenna of lockhole switch.
The output of coding integrated circuit connects one end of modulated resistance, the base stage of another termination modulating tube of modulated resistance, the grounded emitter of modulating tube, modulating tube colelctor electrode is divided into three tunnels, the first via connects the emitter stage of vapotron, second tunnel connects a termination in crystal oscillator three terminations, and the 3rd tunnel connects one end of a magnetic sheet electric capacity, on the input of another termination copper foil antenna of this electric capacity.
Another two terminations of crystal oscillator, a termination connects power supply, and another termination connects the base stage of vapotron.
The base stage of vapotron connects a resistance, and another termination of resistance is connected on copper foil antenna input.
The input of copper foil antenna has also connect a tunable capacitor, the output of the other end connection copper foil antenna of tunable capacitor, the i.e. colelctor electrode of vapotron.
Tunable capacitor is an also in parallel electric capacity.
Telephone alarm is made up of telephone, reception programme control circut, interface circuit, radio receiver circuit.
4 groups of totally 8 lead-in wires are drawn from a telephone dial key printed panel Copper Foil matrix, wherein two terminations, one side gone between of first group are connected with two Copper Foils corresponding to hands-free button, two terminations, one side gone between of second group are connected with two Copper Foils corresponding to storage one key, two articles of Copper Foils that the terminations, one side of the 3rd group two lead-in wires are corresponding with storing two keys are connected, two terminations, one side gone between of the 4th group are connected with two articles of Copper Foils corresponding to storage triple bond, and another terminations of 4 groups 8 all lead-in wires outwards export; Be connected to reception programme control circut with the control end of interface circuit, be connected to the pile crown of 4 groups of 8 lines of drawing from telephone pad with the controlled end receiving programme control circut.
Radio receiver circuit is by radio reception channel module, and reception antenna and decoding integrated circuit form jointly.
Reception antenna is welded on radio reception channel module input, and radio reception channel module output inputs mutually with decoding integrated circuit and is connected, and the output of decoding integrated circuit inputs with reception programme control circut and is connected.
2, in signal amplification circuit, phase inverter is COMS phase inverter.
3, the power of charge protection resistance should at more than 3W.
4, the number of overvoltage protection diode should be more than the number of voltage coarse adjustment diode more than three or four.
5, commutation diode should select the diode higher than the power of overvoltage protection diode.
6, in on-the-spot warning circuit, commissure electric capacity is electrodeless electric capacity.
For having a clear understanding of the meaning of the technical program, first will make the following instructions:
The existing achievement technology of inventor is that normal door no longer needs mechanical key, but open the door with electronics telecontrol engineering, thus lockhole can be covered, but also remain the mode of mechanical key enabling simultaneously, can also open the door with mechanical key if electronic telecontrol is opened the door when there is problem.If stranger wants to enter house by cracking lockhole, hand has just contacted touch sheet will produce warning, and oneself because electronic telecontrol goes wrong by the situation that mechanical key opens the door, although warning also can be produced, because one of own side is on the scene, so can not feel alarmed.Also therefore identification circuit can differentiate that to open the door be that the normal door of owner or the preparation of perpetrator crack lockhole and enter room automatically.
For this reason, the existing meaning to each technical measures of the present invention, concrete condition is explained as follows further:
One, the float charger that monitor set and voltage stabilizing are integrated is monitor set, voltage stabilizing, floating charge are integrated, and not only all forms the instruction of existing light when alarm or the over-voltage and over-current of power supply own and indicates with sound.No matter can also realize the floating charge of science, be 12V or 6V, also or the battery of 24V uses this circuit can realize science floating charge.More effectively solve the problem that float charge voltage is high and discharge voltage is low.Alarm can normally be worked in all cases.Spy makes the following instructions the float charger that monitor set and voltage stabilizing are integrated:
(1), principle of stabilized voltage:
Voltage stabilizing adjustment triode (108 in Fig. 1) is NPN triode, have employed the form of penetrating with exporting, there is very strong feedback, and the voltage of emitter stage PN junction and a 0.7V fewer than base voltage all the time, the voltage of this voltage and colelctor electrode has nothing to do, therefore once after the base stage voltage stabilizing of voltage stabilizing adjustment triode (108 in Fig. 1), the emitter voltage of voltage stabilizing adjustment triode (108 in Fig. 1) will be stabilized on the voltage of a PN junction fewer than base stage, and this magnitude of voltage is fixed magnitude of voltage based on satisfied arranged standby requirement, such as required voltage is 12V, so the base stage of voltage stabilizing adjustment triode (108 in Fig. 1) is exactly 12.7V.
(2), the explanation of energy lightning protection and anti-overvoltage:
In order to can need not power-off at thundery sky, electrical equipment can normally be worked, lightning protection and anti-overvoltage particularly important.
The reason forming lightning protection and anti-overvoltage is:
1, be equipped with anti-thunder tube, the withstand voltage numerical value of the withstand voltage numeric ratio voltage stabilizing adjustment triode of anti-thunder tube is low, and the stable withstand voltage of lightning protection only has tens volts; and the withstand voltage of voltage stabilizing adjustment triode is a few hectovolt, both coordinate, when there being thunderbolt; anti-thunder tube preferentially disconnects, and protects power supply main body circuit.
2, there is overvoltage crowbar (being made up of 106 in Fig. 1 and 109), when have gush pressure time, overvoltage crowbar is open-minded, again voltage stabilizing is carried out to the base stage of voltage stabilizing adjustment triode, thus the voltage-limiting protection to output voltage terminal is produced, and the adjustable voltage stabilizing branch road of the voltage ratio of overvoltage crowbar (being made up of 110 in Fig. 1 and 111) is high, namely overvoltage protection diode is than many three to five of the number of voltage coarse adjustment diode, thus can not open at ordinary times, just a kind of Status of Backups, secondly, diode in overvoltage crowbar and adjustable voltage stabilizing branch road is all face bonded type diode, height more withstand voltage than common voltage-stabiliser tube, not fragile.
(3), the explanation of overcurrent protection and Monitoring Performance: this circuit has overcurrent protection function: after supporting equipment generating device damages, the fault of normal generation is that complete machine electric current increases, electric current through overcurrent protection resistance (115 in Fig. 1) increases, when after the emitter stage exceeding overcurrent protection triode (112 in Fig. 1) and base voltage, overcurrent protection triode can form forward conduction, and amplify, to the base bleeder current of voltage stabilizing adjustment triode (108 in Fig. 1), thus close the output of voltage stabilizing adjustment triode (108 in Fig. 1), the shunting route of voltage stabilizing adjustment triode (108 in Fig. 1) base stage is from the emitter stage of overcurrent protection triode (112 Fig. 1) to colelctor electrode, and to ground wire after indication light pipe (113 in Fig. 1), simultaneously through deictic word tablet (114 in Fig. 1).
This circuit can become a kind of reason of monitoring observation device; after its load is excessive; overcurrent protection action, overcurrent protection triode (112 in Fig. 1) is open-minded, and indication light pipe and deictic word tablet are in parallelly gone here and there on the colelctor electrode of overcurrent protection triode; therefore; after overcurrent protection triode is opened, namely the current collection of overcurrent protection triode is very after high pressure, and indication light pipe sends light instruction; deictic word tablet sends sound instruction simultaneously, reminds people's equipment to there occurs fault.
After this measure is implemented, another feature of circuit is, when there being fault, protection is formed automatically, and indication light pipe sends light instruction, and deictic word tablet sends sound instruction, and during failure vanishes, automatically recovers.Its reason is that load current is large, and flowing through overcurrent protection resistance (115 in Fig. 1) voltage increases, and overcurrent protection triode is automatically open-minded, automatically recovers after Failure elimination.Had this feature, can get rid of a lot of accidentalia, equipment can not produce mistakenly stop, does not affect normal work.
(4), can the explanation of science floating charge:
The first, the voltage stabilizing adjustment emitter voltage of triode and the voltage of floating charge output point can adjust to standard float charge voltage; because voltage accurate adjustment resistance can adjust the voltage of below 0.7V; so adjustment easily; realize science floating charge, charge protection resistance (116 in Fig. 1) mainly plays two effects, and one is to large power supply current limliting; two is that the voltage realized between floating charge output point and battery (118 in Fig. 1) is isolated; thus when there being interchange, both can floating charge, can working power be become again.
Second, electronic switching tube (117 in Fig. 1) the i.e. effect of battery discharging triode: when only having direct current, battery tension is standard 12V voltage, but when alternating current-direct current mixing, battery standard float charge voltage is 13.8V, but voltage exports as 12V during battery discharging, both during charge and discharge, voltage is inconsistent, if do the isolation between battery and voltage output end with diode, voltage output end only has the pressure drop losing 0.7V during direct current, and the present invention solves this problem well, because electronic switching tube is PNP pipe, during its conducting and battery discharging time, the pressure drop of electronic switching tube is very little, can ignore, very large pressure drop can not be produced, battery discharging triode is made with it, valuable pressure drop can not be lost.
The principle forming discharge and recharge is: base stage controlled resistor (120 in Fig. 1) and the rectification of electronic switching tube export and control diode (119 in Fig. 1), there is such principle: have voltage when rectification exports, just show now have alternating current to exist, battery should be floating charge phenomenon, electronic switching tube is because be PNP pipe, its base stage has voltage to exist, would not conducting, and colelctor electrode would not have voltage to export.When rectification exports no-voltage, electronic switching tube base stage no-voltage, it just forms conducting state, and battery starts electric discharge, colelctor electrode output voltage, so just reliably distinguishes two stages of floating charge and battery discharging.
(5), balance diode to play an important role in this circuit arrangement, because the standard float charge voltage of battery is 13.8V, and operating voltage should be consistent with battery tension, just be unlikely to, because to have a power failure and storage battery forces down and makes equipment not work or cisco unity malfunction, therefore to increase the number of balance diode, float charge voltage 13.8V is reduced to 12V, when having alternating current, equipment normally works, during battery, arrange and standby also normally to work.And diode is the 0.7V of constant substantially, fine debugging, its dynamic electric resistor is little, little to load effect, can not produce output voltage fluctuation, thus ensure that the correctness that alternating voltage exports, and when storage battery power supply, only through the discharge and recharge triode that pressure drop is little, without balance diode, so pressure drop can not be produced, therefore ensure that combined-voltage exports stable.
Two, the explanation of pre-warning:
The signal amplification circuit be made up of enlarge leadingly triode (02 in Fig. 2), phase inverter, control triode (08 in Fig. 2), driving relay (09 in Fig. 2), the touch signal produced after hand being touched touch sheet carries out shaping amplification, be converted into the available signal of telecommunication, and then start on-the-spot warning circuit, form early warning, wherein phase inverter is made up of first order phase inverter (03 in Fig. 2) and second level phase inverter (06 in Fig. 2).
1, reliable trigger.Enlarge leadingly triode is large power triode, employing is penetrated with output form, there is very strong Feedback polarity, when the base stage of enlarge leadingly triode has faint signal, namely the touch signal produced after hand contact touch sheet, the output signal of enlarge leadingly triode passes to phase inverter, the voltage that non-type touch signal is converted to standard by phase inverter exports, and then trigging control triode, start and drive relay, drive relay adhesive, drive relay adhesive contact change and start acoustics circuit, and then produce warning.
2, pre-warning is produced reliable in time.Phase inverter quiescent dissipation is extremely low, and during input signal change, can automatic fitration reconcile, so the voltage exported can be protected, antijamming capability is strong, promotes load-carrying ability, reduces time delay, so when there being triggering signal, pre-warning triggers reliable in time.The sensitivity of phase inverter adjusts very well, and a sensitivity adjustment resistance joined by each phase inverter, i.e. 05 in Fig. 2 and 07, and its sensitivity resistor resistance is large, sensitivity step-down, and resistance is little, and sensitivity raises, and has very strong adjustable.
3, the constant open contact of relay (09 in Fig. 2) is driven to connect power supply, normal pin contact, as output, drives the application of relay, enhances the reliability triggering late-class circuit (being on-the-spot warning circuit) here, small area analysis can be converted to big current by it, triggers late-class circuit more reliable and more stable.
4, further protection is: warn pre-the criminal failing to prevent; if think that further cracking lockhole enters room; just open touch sheet; lockhole switch by touch sheet compressing makes shift knob there occurs displacement because of loosening of touch sheet; start warning system, thus send formal warning enabling signal.
Three, the lockhole switch be arranged under touch sheet on lockhole is a key in the present invention, exactly because there has been lockhole switch, just made warning of the present invention accomplish more scientific, be also the place different from a lot of alarm, its reason is:
1, wrong report can not be produced.When house owner people stays out, the enabling now produced is not normal door, if now crack lockhole to open the door, must be crime behavior, warning be now very crucial, and when owner oneself is opened the door by lockhole with key, because oneself is on the scene, therefore can not make us terrified.
2, be very reliable, the normal life custom of people is affected not, in normal enabling is closed the door, lockhole switch can not action, thus lockhole switch can not damage, and open the door and close the door and also do not need artificial additional move, do not affect the normal habits and customs of people, thus do not affect the normal work that security system starts at every turn.
3, be that lockhole switch is reliably sensitive, just report to the police when crime behavior is not accomplished, thus loss is reduced to minimum.Because when touch sheet loosens, lockhole switch contact will change and send warning enabling signal.
Four, shoot with video-corder the startup of circuit, form the record to case overall process, comprise criminal motive, crime is passed through.
1, when hand touches touch sheet, after signal amplification circuit has had output, will start and shoot with video-corder circuit, shooting with video-corder now is called record before case, the principle of shooting record writing time before generation case: at every turn shoot with video-corder control or door when having output to open electronic switch, signal is had to trigger time controller, so the moment of generation automatically can be recorded.
2 and loosen in touch sheet, while the switch activated warning of lockhole, also can start and shoot with video-corder circuit, form the record of overall process,
Hand produces the principle of shooting record overall process: although have left the theft protection plate above lockhole after forcing open the door, but the lockhole shift knob under being pressed in theft protection plate is no longer oppressed by touch sheet, there occurs change, lockhole switch (28 in Fig. 4) is closed, so opened video camera logging.
Displaying principle is had after shooting record: in Fig. 4,015 is a kind of rest-set flip-flop with display before generation case, thus there is Memorability, each or door has output to open electronic switch (in Fig. 4 016) time, the rest-set flip-flop having memory is triggered in capital, so once after rest-set flip-flop is triggered, additional LED can luminescence display.
In Fig. 4 014 is a kind of instrument and time controller with time controling and display, as long as preset the time, it will output signal, after shooting with video-corder control or door (in Fig. 4 013), open electronic switch (in Fig. 4 016), then allow video camera work.
Five, the explanation of on-the-spot warning circuit: amplifier tube (302 in Fig. 5) is a triode, constitute complementary circuit by a PNP triode (304 in Fig. 5) and NPN triode (305 in Fig. 5) and power amplifier is carried out to audio frequency, when having pre-alarm signal or lockhole switch to have warning enabling signal, open the power supply of on-the-spot warning circuit, so there are voice to produce, what form due to this circuit is an OTL circuit, instead of OCL circuit, so debugging is simple, and have element not perishable, the advantage higher with efficiency, voice sheet (301 in Fig. 5) can record some language in advance, as " please not stopping at this " or " asking speed to be left " etc., and don't the dislike that has nothing to do can be made.
After the invention process, improve the security performance of anti-theft safety door, outstanding advantage is as follows:
One, improve security personnel's performance of anti-theft safety door all sidedly, stranger can kept outside of the door at ordinary times, when someone commits a crime, can give warning in advance, formally can produce warning again, finish the situation of the passive defence of anti-theft safety door in the past completely.
Two, warning function is reliably outstanding, and during input signal change, can automatic fitration reconcile, so the voltage exported can be protected, antijamming capability is strong, promotes load-carrying ability, reduces time delay, highly sensitive, reliable trigger.Attempt when there being people to destroy lockhole crime, just contact touch sheet, early warning type system starts immediately, strengthens the psychological pressure of perpetrator.
Three, record performance of making a video recording is excellent.One is that before case, record is given prominence to the key points.Two is the owners that automatically can show announcement after having record, " can not leak visit ".Three is there occurs to make cases and can record overall process.Four is that shooting records various ways.Five is the time having generation when recording.These 5 meanings have return visit and save time, economize energy, and save device resource etc. number of advantages, really achieving workable feature is.(in the situation of work strain, family can not carry out " return visit " shooting by impunity, more impossible in return visit, watch the much useless record of impunity general).Thus for understanding family public security present situation, very important positive role is had.
Four, startup of reporting to the police is reliably sensitive, shows:
(1), warning system can not be reported by mistake.Because after coordinating with existing achievement, there is automatic recognition property.The enabling produced when owner is absent from the scene may be only crime behavior.Otherwise behavior of not committing a crime, lockhole switch can not send signal, and this is the intrinsic property due to lockhole switch, and the change of contact occurs inherently to occur when lockhole shift knob is being subject to compressing and is not suffering oppression.When without crime behavior, the button of lockhole switch is subject to the compressing of touch sheet, thus lockhole switch contact can not change, and when there being crime behavior, touch sheet souththern pine moves, the button of lockhole switch is no longer by the compressing of touch sheet, and thus the contact of lockhole switch there occurs change, thus starts warning.
(2), easy to use, dependable performance, protection is tight, and lockhole switch does not affect normal habits and customs after installing completely, and when without event, lockhole switch is standby, the initiative alarming when event occurs.
Five, the enforcement of float charger that monitor set and voltage stabilizing are integrated ensures the reliability of alarm, it shows: 1, the float charger that is integrated of monitor set and voltage stabilizing, can provide stable operating voltage, have again monitoring effect, if arrange and standby occurred fault, warn immediately, be not only and send light warning, also warn with sound, active warning user, if failure vanishes, warning also disappears immediately, and tracing property is strong.
2, lightning protection and anti-overvoltage capabilities strong, selected anti-thunder tube is withstand voltage is tens volts, and selected triode withstand voltage be a few hectovolt, if there is thunderbolt to gush pressure, exceed the withstand voltage of anti-thunder tube, anti-thunder tube preferentially disconnects, and will power supply be made to damage because of thunderbolt, therefore arrange and standby can not need power-off because of thundery sky.
3, anti-overflow is effective, and protection is large, reduces the heating degree of Voltage Cortrol triode.
4, easy to adjust, achieve the science floating charge to battery, widely applicable, all can normally work in the low location of civil power and the high location of civil power.
5, circuit is simplified, easy scheduling and planning, and anti-element of joining is not fragile, improves the reliability of circuit.
Accompanying drawing explanation
Fig. 1 is the float charger circuit diagram that monitor set and voltage stabilizing are integrated.
In figure: 101, civil power input and rectification input; 102, decompression capacitor; 103, commutation diode; 104, anti-thunder tube; 105, rectification output capacitance; 106, inclined resistance on overvoltage protection; 107, inclined resistance on voltage stabilizing adjustment triode; 108, voltage stabilizing adjustment triode; 109, overvoltage protection diode; 110, voltage coarse adjustment diode; 111, voltage accurate adjustment resistance; 112, overcurrent protection triode; 113, indication light pipe; 114, deictic word tablet; 115, overcurrent protection resistance; 116, charge protection resistance; 117, electronic switching tube; 118, battery; 119, rectification exports and controls diode; 120, the controlled resistance of the base stage of electronic switching tube; 121, diode is balanced; 122, combined-voltage output.
Fig. 2 is signal amplification circuit figure.
In figure: 01, touch sheet lead-out wire; 02, enlarge leadingly triode; 03, first order phase inverter; 05, first sensitivity adjustment resistance; 06, second phase inverter; 07, second sensitivity adjustment resistance; 08, triode is controlled; 09, relay is driven; 010, signal amplification circuit exports; 122, combined-voltage output.
Fig. 3 is the scheme of installation of touch sheet and lockhole switch.
In figure: 01, touch sheet lead-out wire; 25, touch sheet; 26, the screw of fixing touch sheet and anti-theft safety door; 27, the printed panel of lockhole switch is welded; 28, lockhole switch; 29, a contact lead-out wire of lockhole switch; 30, another contact lead-out wire of lockhole switch; 31, the screw of fixing welding lockhole switch printed panel; 32, anti-theft safety door; 33, lockhole.
Fig. 4 shoots with video-corder circuit diagram.
In figure: 010, signal amplification circuit exports; 013, startup or door is shot with video-corder; 014, time controller; 015, with the rest-set flip-flop of display; 016, electronic switch; 017, video camera; 28, lockhole switch; 018, manual control switch; 122, combined-voltage output.
Fig. 5 is on-the-spot warning circuit figure.
In figure: 010, signal amplification circuit exports; 30, another contact lead-out wire of lockhole switch; 289, lockhole switch normal pin contact lead-out wire connects the isolating diode of on-the-spot warning circuit; 299, signal amplification circuit connects the isolating diode of on-the-spot warning circuit; 301, voice sheet; 302, amplifier tube; 303, load resistance; 304, PNP triode; 305, NPN triode; 306, commissure electric capacity; 308, loudspeaker.
Fig. 6 is remote control multi-code transmitter circuit diagram.
In figure: 30, another contact lead-out wire of lock-switch; 630, programme control circut is launched; 631, the first phase inverter; 632, the second phase inverter; 633, the 3rd phase inverter; 634, the first block forecast block; 635, the second block forecast block; 636, the 3rd block forecast block; 637, modulation or door; 638, modulated resistance; 639, modulating tube; 640, crystal oscillator; 641, the base resistance of vapotron; 642, the magnetic sheet electric capacity that connects of crystal oscillator the 3rd tunnel; 643, electric capacity in parallel with tunable capacitor; 645, tunable capacitor; 646, vapotron; 647, copper foil antenna; 648, copper foil antenna input.
Fig. 7 is telephone alarm figure.
In figure: 50, reception antenna; 51, radio receiver circuit; 52, programme control circut is received; 53, receive program control control output first to export; 54, receive program control control output second to export; 55, program control control output the 3rd output is received; 56, program control control output the 4th output is received; 57, the interface circuit between programme control circut and telephone is received; 58, from the output line that storage triple bond is drawn; 59, from the output line that storage two key is drawn; 60, from the output line that storage one key is drawn; 61, from the output line that Hands-free key is drawn; 62, Hands-free key; 63, a key is stored; 64, two keys are stored; 65, triple bond is stored; 66, telephone key dish.
Fig. 8 is each several part relation block diagram.
In figure: 25, touch sheet; 28, lockhole switch; 013, startup or door is shot with video-corder; 014, time controller; 015, with the rest-set flip-flop of display; 016, electronic switch; 017, video camera; 018, manual control switch; 701, the float charger that is integrated of monitor set and voltage stabilizing; 702, signal amplification circuit; 703, on-the-spot warning circuit; 705, circuit is shot with video-corder; 706, remote control multi-code transmitter circuit; 707, telephone alarm.
Detailed description of the invention
Fig. 1 to Fig. 8 has stated specific embodiment of the invention example.
One, according to Fig. 3, touch sheet and lockhole switch are installed.
1, be processed into one block of hard material and strike out the dome larger than lockhole and make touch sheet.
2, spile as fixing screw hole (take off on the time of touch sheet to increase, advise beat several screw hole, how upper several screws) at the periphery of touch sheet, the place punching of installing touch sheet at shop front lockhole is corresponding with it, the installing hole tapping of the shop front more.
3, between touch sheet and door, add hollow cushion ring, allow hollow place expose lockhole.
4, touch sheet is fixed in the shop front.When should note fixing between touch sheet and door when fixing, pad last layer insulant is as plastic washer.
5, connect touch sheet with one end of a wire, the other end is connected to the base stage of enlarge leadingly triode in signal amplification circuit.
6, be welded on a bar printing plate by lockhole switch, the printed panel having welded switch is fixed on door lock hole.
7, a contact lead-out wire of lockhole switch connects the combined-voltage output of the float charger that monitor set and voltage stabilizing are integrated, and another contact lead-out wire connects three tunnels, and a road connects the power end of on-the-spot warning circuit; Another road connects an input of shooting with video-corder startup or door in circuit, and the 3rd tunnel connects the remote control multi-code transmitter circuit of tele-alarm circuit.
8, touch sheet oppresses lockhole shift knob after fixing.
Two, installation and debugging signal amplification circuit.
1, selectors: large power triode selected by triode, COMS phase inverter selected by phase inverter.
2, according to Fig. 2 welding, drive the constant open contact of relay to connect the combined-voltage output of alternating current-direct current lightning protection power source, normal pin contact is the output of signal amplification circuit, connects on-the-spot warning circuit and shoots with video-corder circuit.
3, debug.
Test and adjustment bridge type front end units: the emitter stage surveying enlarge leadingly triode with the voltage gear of universal meter, or the colelctor electrode of observing and controlling triode, when hand does not contact touch sheet, the transmitting very low level of enlarge leadingly triode, and to control transistor collector be high-order, and when hand contacts touch sheet, the transmitting of enlarge leadingly triode is very high-order, controlling transistor collector is low level, if not bery sensitive, should adjust sensitivity adjustment resistance.
Three, the enforcement of on-the-spot warning circuit: weld audio amplification circuit by shown in Fig. 5, is connected the power supply as on-the-spot warning circuit after an isolating diode respectively using signal amplification circuit output and lockhole switch normal pin contact lead-out wire.
Four, circuit is shot with video-corder in connection as shown in Figure 4.
Detect: when pressing manual control switch, the output of surveying electronic switch with universal meter voltage gear is just high-order, or observing photorecorder should start, otherwise manual control switch is bad, or prime does not connect.
Five, the float charger that monitor set and voltage stabilizing are integrated is implemented: 1, hectovolt on high back-pressure large power triode and withstand voltage selected by voltage stabilizing triode, and voltage stabilizing triode is NPN triode, and overcurrent protection triode and electronic switching tube are all PNP triode.Anti-thunder tube selects withstand voltage to be the anti-thunder tube of tens volts.
2, weld by Fig. 1 wiring diagram.Overvoltage protection diode is than many three to five of the number of voltage coarse adjustment diode, and namely the voltage of the voltage ratio of overvoltage crowbar adjustable voltage stabilizing branch road is high.
3, power supply output valve is adjusted.The number of adjustment voltage coarse adjustment diode, can adjust on a large scale, each diode 0.7 volt of range of voltages is adjusted, voltage accurate adjustment resistance makes the Voltage Cortrol within 0.7 volt, its rule is that more multi-output voltages is higher for the number of voltage coarse adjustment diode, or the resistance of voltage accurate adjustment resistance is larger, output voltage is higher, otherwise lower.
3, overvoltage protection parameter is adjusted.Break transformer primary side, exports, click rectifier terminal with the DC voltages of 100 volts with the oscillographic source of stable pressure that is connected on; oscilloscope display output; the limited extent of this voltage rise, otherwise the voltage stabilizing value that should adjust overvoltage crowbar, namely increase or reduce the number etc. of overvoltage protection diode.
4, protection parameters is adjusted: be connected in combined-voltage output with table meter; export fictitious load in end band at combined-voltage, adjustment fictitious load resistance simulation short trouble, to requiring, is namely the current peak occurring requiring; afterwards, at this moment current values shown in ammeter can decline to a great extent.Indication light Guan Liang simultaneously, deictic word tablet sends sound warning, otherwise should adjust the resistance of overcurrent protection resistance.
5, adjust the performance of electronic switching tube, the first is when rectification has output, and emitter stage and the collector voltage of surveying electronic switching tube should be opened a way.It two is when rectification no-output, and the emitter stage surveying electronic switching tube should be less than 0.1 with collector voltage, otherwise the base resistance resistance of change electronic switching tube.
Six, remote control multi-code transmitter circuit is implemented by Fig. 6, export with transmitting programme control circut first and connect first phase inverter input, this phase inverter exports the chip select end of connection first block forecast block, the modulation of this encoding block exports the input connecting modulation or door, the output of programme control circut second is launched as method connects, this modulation exports another input connecting modulation or door, connects the base stage of modulating tube after the output series modulation resistance of modulation or door.
Copper foil antenna is strictly formulated on request.
Seven, implement telephone alarm by Fig. 7: the telephone transformation 1, with 3 storage number abilities, first telephone is taken apart, expose the printed panel corresponding with keyboard.
On two Copper Foils that when 2, being fixed on that on keyboard, Hands-free key is pressed with two wires, its conductive rubber correspondence connects.
3, be fixed on two wires and keyboard store on two Copper Foils that when a key is pressed, its conductive rubber correspondence connects.
4, be fixed on two wires and keyboard store on two Copper Foils that when two keys are pressed, its conductive rubber correspondence connects.
5, be fixed on two wires and keyboard store on two Copper Foils that when triple bond is pressed, its conductive rubber correspondence connects.
6, by these 4 groups totally 8 lead-in wires, respectively 4 outputs of connection reception programme control circut, when connecting, Hands-free key connects the first output, and be linked in sequence first, second and third stores key later.
7, the output of radio receiver circuit is connected on the starting end receiving programme control circut.
8, by the telephone lid involution of dismounting.
Eight, each several part relation as shown in Figure 8.

Claims (6)

1. a monitor-type early warning type electronic anti-theft safety door, is characterized in that: the float charger be integrated by monitor set and voltage stabilizing, touch sheet, lockhole switch, signal amplification circuit, shoot with video-corder circuit, on-the-spot warning circuit, remote annunciator form jointly;
Wherein: the float charger that monitor set and voltage stabilizing are integrated by rectification circuit, anti-thunder tube, voltage stabilizing Circuit tuning, overvoltage crowbar, current foldback circuit and monitoring means, discharge and recharge electronic switching circuit, balance diode and jointly form;
Rectification circuit is that rectification two commutation diode series connection become a branch road, article two, the positive pole of branch road links together becomes the minus earth line of rectification, article two, the negative pole propped up links together, become rectification output cathode and rectification output, civil power enters the rectification input i.e. series connection contact of the commutation diode of two branch roads after capacitance decompression;
Voltage stabilizing Circuit tuning: rectification exports and connects a rectification output capacitance over the ground, the colelctor electrode of voltage stabilizing adjustment triode is connected to rectification and exports, on voltage stabilizing adjustment triode, resistance termination connects the base stage of voltage stabilizing adjustment triode partially, another termination connects the positive pole of diode in overvoltage crowbar, the base stage of voltage stabilizing adjustment triode be connected to by the adjustable voltage stabilizing branch road of voltage coarse adjustment diode and voltage accurate adjustment resistant series to, the emitter stage of voltage stabilizing adjustment triode has been connected a termination of overcurrent protection resistance, another termination of overcurrent protection resistance connects positive pole and the floating charge output point of balance diode, the negative pole of balance diode becomes output voltage terminal,
Overvoltage crowbar: be made up of resistance inclined in overvoltage protection diode and overvoltage protection, on overvoltage protection, inclined resistance one connects rectification output cathode, the positive pole of a connection diode, and the negative pole of diode is received in adjustable voltage stabilizing branch road;
Current foldback circuit and monitoring means: the emitter stage of overcurrent protection triode is connected to the base stage of voltage stabilizing adjustment triode, the base stage of overcurrent protection triode connects the positive pole of balance diode, the colelctor electrode of overcurrent protection triode connects two-way, and a road is that connection indication light pipe is to ground; Another road has connect one piece of deictic word tablet over the ground;
Discharge and recharge electronic switching circuit: exported control diode jointly formed by electronic switching tube, battery, charge protection resistance, base stage controlled resistor, rectification;
The emitter stage of electronic switching tube connects a charge protection and hinders on floating charge contact, the emitter stage of electronic switching tube is also connected to battery, the controlled resistance of base stage of electronic switching tube receives ground, rectification exports the positive pole controlling diode and is connected on rectification output cathode, rectification exports the base stage that the negative pole controlling diode connects electronic switching tube, colelctor electrode and the output voltage terminal of discharge and recharge triode link together, and namely combined-voltage exports;
One end of anti-thunder tube is received rectification and is exported, other end grounding wire;
Touch sheet is that one piece of sheet metal is made, larger than lockhole, is arranged on above door lock hole, is covered by lockhole switch together with lockhole, and a touch sheet wire is drawn, the base stage of preposition triode in connection signal amplifying circuit;
Signal amplification circuit is made up of enlarge leadingly triode, phase inverter, control triode, driving relay;
The base stage of enlarge leadingly triode in the lead-out wire connection signal amplifying circuit of touch sheet, the combined-voltage that the colelctor electrode of enlarge leadingly triode connects the float charger that monitor set and voltage stabilizing are integrated exports, emitter stage connects the input of first order phase inverter, the output of first order phase inverter connects with the input of second level phase inverter, indirect first the sensitivity adjustment resistance of constrained input of first order phase inverter, second level phase inverter exports the base stage of connection control triode, indirect second the sensitivity adjustment resistance of constrained input of second level phase inverter, control the grounded emitter of triode, colelctor electrode connects the line bud lower end driving relay, on line bud, the combined-voltage of the float charger that termination monitor set and voltage stabilizing are integrated exports, the combined-voltage driving the constant open contact of relay to connect the float charger that monitor set and voltage stabilizing are integrated exports, normal pin contact connects on-the-spot warning circuit with shooting with video-corder in circuit as the output of signal amplification circuit and starts or one of them input of door,
Lockhole switch is first welded on a bar printing plate, the printed panel having welded lockhole switch is placed under touch sheet again, on lockhole, when under touch sheet lid, oppress the button of lock-switch, the combined-voltage of the float charger that a contact lead-out wire connection monitor set of lockhole switch and voltage stabilizing are integrated exports, and another contact lead-out wire of lockhole switch connects three tunnels, one tunnel connects the power end of on-the-spot warning circuit, and another road connects an input of shooting with video-corder startup or door in circuit; 3rd tunnel connects the remote controlled transmitting circuit in remote annunciator;
Shoot with video-corder circuit by by starting or door, electronic switch, with the rest-set flip-flop of display, time controller, manual control switch forms jointly;
A contact lead-out wire of the output of signal amplification circuit, another contact lead-out wire of lockhole switch, manual control switch, the input of receiving startup OR circuit respectively of time controller, start or door export connect electronic switch, the output photorecorder of electronic switch, the control end of time controller with the rest-set flip-flop shown;
On-the-spot warning circuit: another contact lead-out wire of lockhole switch and signal amplification circuit export the positive pole connecing an isolating diode respectively, as the power supply of on-the-spot warning circuit after the negative pole of isolating diode links together, the output of voice sheet is connected to the base stage of amplifier tube, the grounded emitter of amplifier tube, colelctor electrode is connected in the base stage of PNP triode, the base stage of PNP triode has also connect one end of load resistance, the load resistance other end connects the base stage of NPN triode, the central point that PNP triode is connected with NPN transistor emitter is contacted a commissure electric capacity, one end of another termination loudspeaker of commissure electric capacity, the other end grounding wire of loudspeaker,
Remote annunciator is made up of remote control multi-code transmitter road and telephone alarm:
Remote control multi-code transmitter circuit is made up of radio circuit and coding circuit;
Coding circuit by launching programme control circut, phase inverter, encoding block, modulation circuit form;
Modulated resistance is by modulate or door, modulated resistance, modulating tube form;
It is the input connecting a phase inverter with the output of launching programme control circut respectively, the output of each phase inverter has connected the chip select end of a block forecast block, the output of every block forecast block connects the input of a modulation or door respectively, and the output of modulation or door is connected to modulating tube base stage in radio circuit after modulated resistance;
Radio circuit is made up of radiating circuit and copper foil antenna;
Copper foil antenna is specific English lower case N-shaped, article two, connect with arc Copper Foil kissing above vertical parallel Copper Foil, antenna Copper Foil width is 2 millimeters, the vertical parallel Copper Foil length in two, left and right is 30 millimeters, article two, the spacing of vertical parallel Copper Foil is 20 millimeters, and the height that kiss connects the arc Copper Foil of two vertical parallel Copper Foils is 4.5 millimeters;
Radiating circuit: one end of copper foil antenna is input, i.e. power firestreak end, the live wire of coding integrated circuit is connected on power supply, the input of another contact lead-out wire connection copper foil antenna of lockhole switch;
The output of coding integrated circuit connects one end of modulated resistance, the base stage of another termination modulating tube of modulated resistance, the grounded emitter of modulating tube, modulating tube colelctor electrode is divided into three tunnels, the first via connects the emitter stage of vapotron, second tunnel connects a termination in crystal oscillator three terminations, and the 3rd tunnel connects one end of a magnetic sheet electric capacity, on the input of another termination copper foil antenna of this electric capacity;
Another two terminations of crystal oscillator, a termination connects power supply, and another termination connects the base stage of vapotron;
The base stage of vapotron connects a resistance, and another termination of resistance is connected on copper foil antenna input;
The input of copper foil antenna has also connect a tunable capacitor, the output of the other end connection copper foil antenna of tunable capacitor, the i.e. colelctor electrode of vapotron;
Tunable capacitor is an also in parallel electric capacity;
Telephone alarm is made up of telephone, reception programme control circut, interface circuit, radio receiver circuit;
4 groups of totally 8 lead-in wires are drawn from a telephone dial key printed panel Copper Foil matrix, wherein two terminations, one side gone between of first group are connected with two Copper Foils corresponding to hands-free button, two terminations, one side gone between of second group are connected with two Copper Foils corresponding to storage one key, two articles of Copper Foils that the terminations, one side of the 3rd group two lead-in wires are corresponding with storing two keys are connected, two terminations, one side gone between of the 4th group are connected with two articles of Copper Foils corresponding to storage triple bond, and another terminations of 4 groups 8 all lead-in wires outwards export; Be connected to reception programme control circut with the control end of interface circuit, be connected to the pile crown of 4 groups of 8 lines of drawing from telephone pad with the controlled end receiving programme control circut;
Radio receiver circuit is by radio reception channel module, and reception antenna and decoding integrated circuit form jointly;
Reception antenna is welded on radio reception channel module input, and radio reception channel module output inputs mutually with decoding integrated circuit and is connected, and the output of decoding integrated circuit inputs with reception programme control circut and is connected.
2. a kind of monitor-type early warning type electronic anti-theft safety door according to claim 1, is characterized in that: in signal amplification circuit, phase inverter is COMS phase inverter.
3. a kind of monitor-type early warning type electronic anti-theft safety door according to claim 1, is characterized in that: the power of charge protection resistance should at more than 3W.
4. a kind of monitor-type early warning type electronic anti-theft safety door according to claim 1, is characterized in that: the number of overvoltage protection diode should be more than the number of voltage coarse adjustment diode more than three or four.
5. a kind of monitor-type early warning type electronic anti-theft safety door according to claim 1, is characterized in that: commutation diode should select the diode higher than the power of overvoltage protection diode.
6. a kind of monitor-type early warning type electronic anti-theft safety door according to claim 1, is characterized in that: in on-the-spot warning circuit, commissure electric capacity is electrodeless electric capacity.
CN201420830428.4U 2014-12-25 2014-12-25 A kind of monitor-type early warning type electronic anti-theft safety door Expired - Fee Related CN204511220U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109302087A (en) * 2018-11-24 2019-02-01 江门波威音响器材有限公司 A kind of amplifier power supply circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109302087A (en) * 2018-11-24 2019-02-01 江门波威音响器材有限公司 A kind of amplifier power supply circuit

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