CN203271328U - Electronic automatic camera shooting protector - Google Patents

Abstract

The utility model provides an electronic automatic camera shooting protector and belongs to the technical field of protection. The electronic automatic camera shooting protector is composed of a security door, a combined power source, a lockhole covering sheet, a shooting control unit, a starting switch and a sound system. The starting switch is arranged on a door lockhole, the lockhole covering sheet covers the lockhole and the starting switch. When cases happen, touch signals can be generated as long as the lockhole covering sheet is touched, then the touch signals are subjected to secondary amplification by an automatic control circuit in the shooting control unit, a shooting instrument and the sound system can be started accurately to carry out shooting and generate early warnings, if the cases can not be stopped, contacts of the starting switch can be changed and generate alarm starting signals as long as the lockhole covering sheet is loosened, and meanwhile the shooting control unit and the sound system are started to carry out shooting and generate alarming sounds. In cooperation with the combined type power source good in anti-thunder effect and voltage stabilizing effect, the electronic automatic camera shooting protector can further improve performance of anti-theft products.

Description

Electronics automatic camera protector

Technical field

Belong to the safety technique field.

Background technology

Family is the bay of happiness, and antitheft is the important topic of household safe for a long time, allow antitheft series products further develop, and needs many-sided combination.The security personnel's equipment that coordinates with alarm on market is also a lot, and in base, the camera monitoring device accounts for significant proportion, and it can monitor this regional people and thing at any time, and situation plays an important role to understanding at that time.

General family just begins the record of making a video recording in order to reduce expenses when mostly selecting event has occured, although such function is very important, but the situation before can't the understanding case also becomes a kind of very large deficiency.Because have after the front record of concluding a case one to be to perform in advance security measures, gaining the initiative property, generation event after even overcoming.The 2nd, the front record of concluding a case is arranged, to the understanding of event more comprehensively.So have the front shooting of case writing function important in inhibiting.

Any electronic product all needs a good power supply to coordinate with it, just can become real outstanding product, and security personnel's series products is strict especially to the requirement of power supply, if but present circuit of three-terminal voltage-stabilizing integrated without transformation directly application can not reach effect preferably.Its main cause one is that the lightning protection grade is not high, and the equipment of ensuring public security like this will may damage in thunderstorm season, or cisco unity malfunction, will cause the protector serious period out of control.The 2nd, can not work in the very wide scope of civil power, directly affected the range of application of security personnel's equipment.The 3rd, voltage stabilizing numerical value can not be transferred to the voltage stabilizing value of decimal neatly, as 3.7 volts, 12.7 volts.Cause a major reason of above 3 deficiencies to be that the inherency of the three end integrated stable voltage circuits (as circuit of three-terminal voltage-stabilizing integrated 78 series) in electronic product causes, the voltage of 78 serial integrated regulator inputs can not be too high, is generally 30 volts.And have the input of three end integrated circuits when being struck by lightning to surpass this value.So caused the deficiency of first aspect.Cause the reason of the deficiency of second aspect to be, also because the input voltage rated value of three ends is not high, so the design of the secondary low-voltage side output voltage of transformer is restricted.In present traditional design, although proposed the scheme of triode and three end co-design, produced again new contradiction, owing to having increased easy failed part Zener diode, this just may produce the negative sense result of two aspects, and the one, reliability is affected, the 2nd, lightning protection effect is affected, and causes the reason of the third aspect to be, because the output valve of circuit of three-terminal voltage-stabilizing integrated is a certain integer value of fixing, as, 5 volts, 8 volts, 12 volts, can't satisfy the demand fractional value float charge voltage, as 12.6 volts, etc., also inconvenient when adjusting its voltage stabilizing value, namely be unfavorable for batch production.

In addition, the voltage-stabilized power supply of joining also relates to many-sided constraints such as cost and reliability, so required voltage-stabilized power supply is simple at first sight, but carefully analyzes, really many places difficult point, also further innovation abrim.

Above-described difficult point so cause the deficiency of antitheft series products, therefore also needs further to promote with perfect.

Summary of the invention

Main purpose of the present invention is to use lightning protection effect modular power supply good, that voltage regulation result is good to coordinate with it, utilize the prior art achievement, new measure is proposed, become a kind of novel antitheft series products, the unessential part of shooting record energy automatic fitration, when there is something special, the record of in time making a video recording had further promoted the performance of anti-theft product.

The technical solution used in the present invention is:

1, electronics automatic camera protector is by security door, modular power supply, and lockhole is covered sheet, shoots with video-corder control module, starting switch, several parts of sound system form jointly.

Wherein: modular power supply by anti-thunder tube, penetrate with snubber, the snubber base is pressed Circuit tuning, " lightning protection overvoltage backup " three end integrated circuits and pressure regulation peripheral element combine.

Output after rectification has connected three branch roads, one of be to have connected an anti-thunder tube between over the ground; Two are the colelctor electrodes that connected triode, three are ends that connected a resistance; The other end of this resistance has connected the base stage of triode; The emitter stage of this triode has connected the input of three end integrated circuits.

Penetrate with the snubber base stage and connected two groundings, article one branch road is the positive pole that base stage has connected a voltage-stabiliser tube, and the minus earth of this voltage-stabiliser tube, this branch road have formed " lightning protection overvoltage backup " branch road; The second branch road is base terminal through ground connection after the branch road of two resistance series connection; Be connected on the output of three end integrated circuits with the positive pole of a diode; This pipe negative pole has been connected on the base stage contact of second branch road two resistance series connection over the ground.

Terminated at the output of three end integrated circuits with a resistance one, the other end has been connected on the earth terminal of three end integrated circuits, be composed in series a new branch road with diode and resistance, the earth terminal that has terminated at three end integrated circuits of diode cathode in this branch road, other end ground connection.

Outwards export with hot junction and cold end line that output line and the ground wire of three end integrated circuits formed source of stable pressure jointly.

It is a sheet metal that lockhole is covered sheet, is positioned on above lockhole, and starting switch and lockhole are covered fully, covers on sheet at lockhole with a wire bonds, and the wire other end is outwards drawn, and the front shooting of case that is connected in the shooting control module is recorded on automatic control circuit.

Starting switch is the lockhole switch, is arranged on the place under lockhole coverage sheet on lockhole, covers sheet with lockhole when mounted the button of switch is pushed down, and the lockhole switch contact is drawn with wire.

shooting with video-corder before case in control module shooting, to record automatic control circuit be the normal phase input end that signal leading arrives first order operational amplifier, the negative phase end of first order operational amplifier is connected a gain adjusting resistance with the output of first order amplifier, the output of first order amplifier is connected to the normal phase input end of second level amplifier, comparison bleeder circuit by two resistance series connection, two resistance series connection points connect the negative phase end of second level amplifier, bleeder circuit one termination live wire, other end grounding wire, the output of second level amplifier is namely that the output of early warning electronic circuit has connected video camera recorder.

the sound equipment caution system is the base stage that the output of voice sheet has connected preposition amplifier tube, the grounded emitter of preposition amplifier tube, colelctor electrode is connected on the base stage of the PNP pipe that forms power amplifier, the base stage that forms the PNP pipe of power amplifier has also connect an end of power amplifier level load resistance, the load resistance other end connects to form the base stage of the NPN pipe of power amplifier, the PNP pipe that forms power amplifier manages with NPN commissure electric capacity of central point series winding that emitter stage is connected, one end of another termination loudspeaker of commissure electric capacity, the other end grounding wire of loudspeaker, the NPN pipe Integrated electrode that forms power amplifier is received on the electronic switch of shooting with video-corder in the unit.

2, in sound system, the NPN pipe of composition power amplifier is all large power triode with the PNP pipe, withstand voltage 100V.

3, the dual-stage amplifier that before case, shooting is recorded in automatic control circuit is 324.

4, shoot with video-corder the rest-set flip-flop that also has band to show in control module, time controller, shooting manually boots switch, video camera recorder.

5, being connected on the branch road of penetrating with " lightning protection overvoltage backup " on the snubber base stage in modular power supply is the series circuit of a voltage-stabiliser tube and several diodes, and the number of diode series connection is one, or more than one.

6, in modular power supply in the diode and resistance series arm between three end integrated circuit earth terminals and ground wire, the number of diode series connection is one, or more than one.

Be the clear meaning of understanding the technical program, the spy makes the following instructions:

One, before this, the inventor is studied security door, and proposed normal door and opened the door without mechanical key, but the measure of the mode of opening the door with electronics telecontrol engineering or phone.Be when normal door, send instruction by remote control to the power set that are installed in door, promote the lockset action, realize opening the door.Meanwhile, still kept the form that mechanical key opens the door, its objective is to have a kind of opening the door to make up when automatic system goes wrong, so security door can be made lockhole semiclosed processing, its meaning is, during normal the use, lockhole is covered, and only during out of order special circumstances, just lockhole is covered sheet and is opened.

Two, tool is understood, and to the security personnel of family, the most important thing is the security personnel of opposite house, and the security personnel of opposite house, emphasis is again the security personnel to lockhole, because the great majority crime is all by cracking of lockhole entered house.For this reason, the inventor has covered cover plate above lockhole, Men Bulu lockhole at ordinary times, on the contrary be mostly suspectable people with the people that hand is taken off lid.The record so should make a video recording, and be the important front shooting of case record.

Three, based on above-mentioned situation, record three kinds of functions before the case of measure of the present invention, one of function be that shooting begins immediately as long as hand touches lockhole top cover plate, if stop continuing, automatically stop taking.Two be to have recorded simultaneously when automatic camera records the time that occured at that time, three be occurrence record after, the Presentation Function of record before case will be arranged, announcements in the people overwriting situation once occured, to watch.

Four, can preset with the rule of time period and initiatively make a video recording, be namely artificially will be set in the time on one's own initiative on a certain period, and this moment, video camera recorded ambient conditions with automatic camera, rather than will contact the lockhole cover plate.This situation is mainly for the active monitoring of the people of family to environment.It should be noted that it is whole shootings of 24 hours all day that this period comprises.

Five, produce the principle explanation of above function: (explain with Fig. 1.）

Produce the principle of contact lockhole cap automatic camera record: cover sheet when the hand contact is locked into lockhole, after being top, hole cover plate, then the touch signal that has taken out human body is input in the in-phase end of operational amplifier of the first order and amplifies, being input to again afterwards comparison amplifier further amplifies, this have a very large gain, can fully guarantee to warn in advance sensitivity and the reliability of signal.Its reason is in this circuit, the resistance of first order operation amplifier level (in accompanying drawing 1 103) can be adjusted the gain of this grade flexibly, and the divider resistance ratio (109 in accompanying drawing 1) of adjusting the comparison amplifier end of oppisite phase that second level operation amplifier level forms can be adjusted again the gain of this grade flexibly.

Producing the principle of period shooting record: 116 in Fig. 1 is a kind of have time control and instruments (abbreviation time-controlling apparatus) that show, as long as preset the time, it will output signal, through or door (in Fig. 1 111) after, open electronic switch (in Fig. 1 112), then allow video camera work.

Produce the principle that overall process is recorded in shooting: although after forcing open the door, hand has left lockhole top cover plate, but above lockhole and the alarm switch contact that is pressed under cover plate is not oppressed by cover plate, variation has occured, and in this Fig. 1, switch 119 is closed, so opened the video camera logging.

After the front shooting record of generation case, displaying principle is arranged: in Fig. 1,118 is a kind of rest-set flip-flops with demonstration, thereby have Memorability, when each or door has output to open electronic switch 112, all can trigger the rest-set flip-flop of memory, in case so after rest-set flip-flop was triggered, additional LED can luminescence display.

The principle of shooting record writing time before the generation case: when each or door has output to open electronic switch 112, have signal to trigger the time controller, so can automatically record the moment of generation.

Six, produce the warning function principle: when loosening or open the cover plate of lockhole top fully after, the alarm switch button of being satisfied with cover plate below, lockhole top does not suffer oppression and the contact changes, so started video camera work, has opened simultaneously warning system work.

Seven, the such installation benefit of starting switch be sensitive, reliable, can generation not make us terrified wrong report simultaneously.Reason one is alarm switch when event does not occur, and the contact can not be subjected to displacement.The 2nd, do not affect the normal habits and customs of people, thereby do not affect the normal operation of the each starting of security system.

Eight, the sound equipment principle is: be comprised of a triode prestage that sound equipment amplifies, formed complementary circuit by a PNP and NPN triode audio frequency has been carried out power amplifier, when pre-caution signal is arranged, the power supply of having opened this part is controlled in its output, so have voice to produce, due to this electric circuit constitute be an OTL rather than OCL circuit, so debugging is simple, and have element not perishable, and the higher advantage of efficient.

Nine, modular power supply has important effect in this product, and the spy is explained as follows power circuit: (1), circuit totally consist of and main feature: adopted traditional classical three end integrated circuits to make the last output of voltage stabilizing.Before three end integrated circuit inputs, increased the one-level emitter follower and made snubber, but the design scheme one different from tradition is not contain consumable accessory zener diode, good reliability during this grade normal operation.The 2nd, thunderbolt (overvoltage) there are three grades of strick precautions, overvoltage is taken precautions against effective.The 3rd, adopted 3 measures to make three adjustable, the easy accent of end integrated circuit voltage stabilizing value.

(2), the explanation of three-level protective principle has been carried out in lightning protection.One of be to have increased emitter follower newly between rectification and three end integrated circuits, high back-pressure high power valve is adopted in this pipe design, its back-pressure can reach hundreds of volts, is almost 10 times of left and right of the circuit of three-terminal voltage-stabilizing integrated input voltage of 78 series, is equivalent to ability to bear and has improved 10 times.Two be to have increased anti-thunder tube to make second class protection, the limiting voltage in the time of can be with thunderbolt is in the scope of tens of volts of breakdown voltage.Three be to have increased " lightning protection overvoltage backup " circuit in the base stage that output voltage is adjusted pipe, (voltage-stabiliser tube 327 branch roads in figure), the duty of this pipe is, be at ordinary times the no current conducting state, its reason is that in circuit, selected voltage-stabiliser tube voltage stabilizing value has surpassed the pressure drop of two resistance series arms (328 in figure and 329 series arms) over the ground of emitter follower base stage, so by clamper.Formed like this benefit of two aspects, the one, no current during because of usual work does not produce electrical wear, so can not damage, has guaranteed reliable when using.The 2nd, when input has high pressure; as thunderbolt; or the civil power accident is when having high pressure; in accompanying drawing 328 and 329 series arm pressure drops raise; at this moment " lightning protection overvoltage backup " branch road, (voltage-stabiliser tube 327 branch roads in figure), conducting immediately automatically; newly-increased emitter follower base stage is produced pressure-limiting function immediately, implement protection.Due to the three-level protective that has formed thunderbolt, so when bad weather, needn't be to the disconnected power down of the present invention source, and can work.

(3), can not damage the circuit explanation in civil power higher place and period.Its reason such as back and forward, thunderbolt are a kind of reasons of overvoltage.The lightning protection circuit effect is adapted to civil power unexpected the time too.

(4), can be in the explanation of the lower place of civil power and period work.Newly-increased emitter follower is high inverse-voltage tube, so the secondary low-voltage output end voltage of transformer can design higherly, when civil power is low, rectification output is had compensation like this.Therefore expanded the civil power lower range.

(5), can expand the explanation of civil power excursion.Its reason is that civil power does not damage circuit when high, and when low, compensation is arranged, so expanded the operation interval that civil power changes.

(6), take the adjustable and easy Several Measures of transferring of three-terminal voltage-stabilizing value.One of, be designed with three ends and adjust the adjustable peripheral circuit of voltage stabilizing value, in this electricity routing diagram: 333,334,335 3 elements form.Two, three end integrated circuit earth terminals and ground wire between adopted the mode of the branch road that diode connects with resistance, solve easily batch production and adjust flexibly the contradiction of voltage.Due to three end integrated circuit models and individual difference, the electric current that earth terminal flows out is variant, if only is connected with resistance between its earth terminal and ground connection, the resistance of similar resistance is not easy to produce the uniformity of pressure drop, is difficult for producing in batches.Can address this problem with diode, only the electric current of pipe inflow diode has the difference of size, and its pressure drop is 0.7 volt, so batch production need not be adjusted.If but this branch road is only used diode, but can not adjust flexibly required voltage stabilizing fractional value, so the present invention has adopted the adjustment branch road of both series connection, in this branch road, diode is coarse adjustment, because being the major part of pressure drop; And the pressure drop of institute's crosstalk resistance is minute portions, is accurate adjustment.Three, increase in adjustable peripheral element one the road from three ends outputs branch road (333 figure), to strengthen easy batch production.Due to the electric current of this branch road, occupy larger specific gravity in diode and resistance series arm, beneficial to overcoming three end integrated circuit models and individual difference, be conducive to batch production.The rule of adjusting the three-terminal voltage-stabilizing value is, in figure, resistance 334, and resistance is higher, and output voltage is higher, otherwise lower.

(7), in the present invention, in the peripheral element of newly-increased emitter follower, cancel the meaning of the Zener diode in the central core of circulation and form principle.In traditional design, with triode and three end co-design, all need to the base stage of emitter follower over the ground branch road add Zener diode, and this voltage-stabiliser tube is the main branch road of switching on for a long time.Within its objective is that only in this way this pipe output of guarantee can be controlled at rated range.Electronics staff with batch production all knows, Zener diode is a kind of easy failed part, particularly is used in the power supply local (voltage-stabiliser tube 327 is to be in long-term "on" position) of long-term energising.For avoiding this problem, the present invention has adopted to be difficult for failed part resistance unit replacement easy-to-damage element Zener diode, the principle that forms is, newly-increased emitter follower base is pressed Circuit tuning, when normal operation (be namely groundwork path) is 328 and 329 series arm in figure, rather than " lightning protection overvoltage backup " branch road, not namely 327 voltage-stabiliser tube branch road in figure yet.Because this branch road voltage stabilizing value is higher than 328 and 329 series arm pressure drop, during normal operation, by clamper, no current only has accidental cause to wait the overvoltage reason as thunderbolt, and in figure, voltage-stabiliser tube 327 just has electric current to pass through.What also should illustrate simultaneously one is, in the design of the series arm 328 and 329, the pressure drop of resistance 329 is main, be essentially three end output voltages, (only differing from a PN joint), and when design, pressure drop on adjusting resistance 328 only has the three ten-day period of hot season, just can guarantee that the emitter follower output voltage satisfies the input voltage of three end integrated circuits, because this circuit output essence is surely three end integrated circuits, so its voltage regulation performance can not be affected.The 2nd,, because the pressure drop on resistance 329 is mainly that output current by three end integrated circuits provides, rather than by on the emitter follower base stage partially resistance 326 provide, so track stability and easy tonality are played great role.

(8), improve the Several Measures of reliability: one of, in lightning protection circuit, formed three-level protective, (seeing second).Two, the snubber base presses Circuit tuning to be comprised of resistance series arm (328 and 329 series arms in figure); do not contain easy failed part Zener diode, not fragile, three; design " special substitutes " protected mode branch road in the protection of the lightning protection third level, further improved reliability.

After the invention process, the anti-theft security goalkeeper presents a kind of brand-new looks, and following outstanding advantage is arranged:

1, the line power of sound system is large, and is simple, and debugging is convenient, power saving.

2, after the invention process, anti-theft safety door and alarm have been realized the combination of science, three kinds of functions integrate, one of be to have the function that the people is kept outside the door, two are the functions with automatic camera record, three are the functions of reporting to the police, three kinds of functions are all very important, promote all sidedly security personnel's performance of anti-theft safety door, enriched the kind of security door.

3, the shooting record performance is excellent.The one, before case, record is given prominence to the key points.The 2nd, after being arranged, record can automatically show the owner of announcement, can " not leak visit ".The 3rd, cases has occured to do can record overall process.The 4th, shooting records various ways.The 5th, time of generation is arranged when recording.These 5 meanings have return visit and save time, economize energy, save device resource etc. serial advantage, have realized that really workable characteristics are.(in the situation of work strain, family can not carry out " return visit " to shooting by impunity, more impossible watch in return visit a lot of useless impunities general records).Thereby for understanding the family public security present situation, very important positive role is arranged.

4, warning function is reliable and sensitive, does not importantly produce wrong report.

5, reliable, easy to use.Reason one be video camera recorder and warning system at ordinary times most cases be in the no power state, do not produce electrical wear, all be at any time a kind of " highly waiting " state, the 2nd, closing the door when opening without any need for other additional move user between the whole operating period, do not affect normal habits and customs, can not produce malfunctioning situation.

6, shooting with video-corder control circuit has very high sensitivity and reliability, after debugging, all is fit to all-environment needs, and circuit is simple, and debugging is convenient.

7, produce easily, the one, the simple and reliable debugging of circuit is easy, and the 2nd, do not need the instrument and meter of price top grade.

8, single just have following advantage with regard to modular power supply: (1), performance are good, embody in the following areas: the one, and anti-thunder is effective, has the lightning protection three-level protective, and not fragile at thunderstorm season, supporting electrical equipment needn't quit work at thundery sky.The 2nd, adapt to widely, than traditional voltage-stabilized power supply, wider adaptive capacity is arranged, be namely to make the protector of joining work and be unlikely damage when the high place of voltage and period or accidental cause, and also can work in voltage lower place and period.The 3rd,, can be used for exporting the voltage stabilizing value that there is decimal in generation.And the existing achievement of inventor is security personnel's classes, need to be to the floating charge circuit of battery, and this circuit can not be integer value.So the present invention has very strong ability to provide the auxiliary items, the 4th,, excellent performance.

(2), reliable.Reason one is that in electronic circuit, Zener diode is also one of easy failed part, and in the present invention, voltage-stabiliser tube has been done specially treated, so reliability is higher than traditional co-design.Reason two is, newly-increased emitter follower Guan Weigao back-pressure high power valve in the present invention, and reliability generally all is much higher than common triode.

Description of drawings

Fig. 1 is that before case, automatic control circuit figure is recorded in shooting.

In figure: 3, early warning signal takes out the sheet lead-in wire; 102, first order amplifier positive terminal; 103, first order amplifier gain adjusting resistance; 104, first order amplifier negative phase end; 105, first order operational amplifier; 106, second level amplifier; 107, second level amplifier negative phase end; 108, second level amplifier positive terminal; 109, second level comparison amplifier divider resistance; 111, startup or the door in automatic control circuit recorded in the front shooting of case; 112, electronic switch; 113, video camera recorder; 115,, there is the rest-set flip-flop of demonstration in generation; 116, time controller; 119, starting switch; 120, manual control switch.

Fig. 2 is sound system circuit figure.

In figure: 7, starting switch lead-out wire; 301, neutral voice sheet; 302, preposition amplifier tube; 303, preamplifier state load dual-use function resistance; 304, the PNP pipe that forms power amplifier; 305, the NPN pipe that forms power amplifier; 306, commissure electric capacity (OTL circuit capacitance); 307, electronic switch; 308, loudspeaker.

Fig. 3 is the starting switch scheme of installation.

In figure: 55, the anti-theft security shop front; 56, lockhole; 57, lockhole is covered the fixed screw of sheet; 58, the printed panel of welding starting switch; 59, the screw of fixing welding starting switch printed panel; 119, starting switch; 7, starting switch lead-out wire; 101, lockhole is covered sheet.

Fig. 4 is the modular power supply circuit diagram.

In figure: 321, power transformer primary side civil power input; 322, AC power insurance; 323, transformer; 324, rectification output; 325, anti-thunder tube; 326, inclined to one side resistance on newly-increased triode; 327, " lightning protection overvoltage backup " branch road; 328, newly-increased transistor base is to genuine branch road the first resistance; 329, newly-increased transistor base is to genuine branch road the second resistance; 330, newly-increased triode emitter follower; 331, the integrated protection diode of three ends; 332, three end integrated circuits; 333 voltage stabilizing value adjusting resistances; 334, voltage stabilizing value adjusting resistance; 335, voltage stabilizing value is adjusted diode; 336, voltage stabilizing output; 337 isolating diodes; 338, voltage stabilizing value coarse adjustment diode; 339, " lightning protection overvoltage backup " branch road is adjusted diode.

Fig. 5 is shooting record and the correlation figure partly that reports to the police.

In figure: 36, modular power supply; 101, lockhole is covered sheet; 119, starting switch; 120, manual control switch; 201, shooting tracer signal amplifying circuit before case; Startup or the door of 111, making a video recording before case and recording power amplifier level in automatic control circuit; 112, electronic switch; 113, video camera recorder; 202, sound system.

The specific embodiment

Fig. 1 to Fig. 5 has described the specific embodiment of the present invention.

One, lockhole coverage sheet and the warning firing switch of lockhole top are installed.

1, be processed into the garden lid larger than lockhole with a metal or plastic material and become cover plate of the present invention.

2, make a call to three apertures at the periphery of cover plate, the place punching that cover plate is installed at shop front lockhole is corresponding with it, and the installing hole of the shop front adopts tapping.

3, the micro press-key switch is welded on a bar printing plate allows switch and printed panel become one, be arranged between cover plate and door, when three screw precessions will fixing were fixed on, cover plate should be in key switch is urged to and make constant close contact in the position that disconnects.When outside back-out screw, key switch can be in and not be subject to oppressing, and its constant close contact still reverts to normally closed position, and before the lead-out wire of its contact connects multi-code transmitter circuit, sound system and case, shooting is recorded in automatic control circuit.

Two, record automatic control circuit according to shooting before Fig. 1 enforcement case.

1, press Fig. 1 welding, in figure, active is adopted integrated circuit 324.

2, be soldered rear inspection to function and debugging:

During A, hand contact lockhole top cover plate, video camera recorder work, hand leaves and automatically stops afterwards, otherwise should adjust gain resistor in amplifier (in Fig. 1 109).

The time control section of B, the time-controlling apparatus of adjusting, the time period that simulation is adjusted, video camera recorder should be worked.Otherwise should check and start or door.

C, manually opened switch 120, video camera recorder should be worked.

D, after video camera recorder work, the rest-set flip-flop indicating lamp that band shows is bright, and the time controller has the corresponding time, otherwise should check relevant part.

Three, weld as shown in Figure 2 acoustics circuit, adjust audio frequency adjusting resistance and audio frequency and adjust electric capacity, the sound that allows loudspeaker send is undistorted.

Four, modular power supply is pressed enforcement shown in Figure 4: the first, press the selected relevant elements of Fig. 4.Wherein triode is selected high back-pressure high power valve, as 3DD15; Anti-thunder tube breakdown voltage parameter is tens of volts; Three end integrated circuits select 78 series; Resistance 328 and 329 choosing heat radiation wattages are greater than 1/2nd wattages; In figure, diode all selects the diode of face mating type.

The second, adjust three end integrated circuit output values: the newly-increased transistor collector of (1), short circuit and emitter-base bandgap grading, the output voltage of (2), coarse adjustment three end integrated circuits reaches output voltage with 335 the number that increases diode and substantially meets the requirements.(3), the output voltage of accurate adjustment three end integrated circuits: the resistance of coarse adjustment adjusting resistance 334 and resistance 333, make it to meet the requirements, adjusts the place that complete rear disconnection increases transistor collector and emitter-base bandgap grading short circuit newly.

Three, adjust newly-increased triode emitter-base bandgap grading output valve: the resistance of adjusting resistance 328 allows emitter-base bandgap grading output surpass about 6 volts of three end outputs.

Four, adjust " lightning protection overvoltage backup " branch road voltage stabilizing value: selected this branch road voltage-stabiliser tube voltage stabilizing value, its parameter should be higher than about 2 volts of resistance 328 and 329 series arms, if the voltage-stabiliser tube parameter is too low, the face of should connecting is in conjunction with diode, the number of series connection how much, decides according to base voltage.

Claims (6)

1. electronics automatic camera protector is characterized in that: by security door, and modular power supply, lockhole is covered sheet, shoots with video-corder control module, starting switch, several parts of sound system form jointly;

Wherein: modular power supply by anti-thunder tube, penetrate with snubber, the snubber base is pressed Circuit tuning, " lightning protection overvoltage backup " three end integrated circuits and pressure regulation peripheral element combine;

Output after rectification has connected three branch roads, one of be to have connected an anti-thunder tube between over the ground; Two are the colelctor electrodes that connected triode, three are ends that connected a resistance; The other end of this resistance has connected the base stage of triode; The emitter stage of this triode has connected the defeated of three end integrated circuits;

Penetrate with the snubber base stage and connected two groundings, article one branch road is the positive pole that base stage has connected a voltage-stabiliser tube, and the minus earth of this voltage-stabiliser tube, this branch road have formed " lightning protection overvoltage backup " branch road; The second branch road is base terminal through ground connection after the branch road of two resistance series connection; Be connected on the output of three end integrated circuits with the positive pole of a diode; This pipe negative pole has been connected on the base stage contact of second branch road two resistance series connection over the ground;

Terminated at the output of three end integrated circuits with a resistance one, the other end has been connected on the earth terminal of three end integrated circuits, be composed in series a new branch road with diode and resistance, the earth terminal that has terminated at three end integrated circuits of diode cathode in this branch road, other end ground connection;

Outwards export with hot junction and cold end line that output line and the ground wire of three end integrated circuits formed source of stable pressure jointly;

It is a sheet metal that lockhole is covered sheet, is positioned on above lockhole, and starting switch and lockhole are covered fully, covers on sheet at lockhole with a wire bonds, and the wire other end is outwards drawn, and the front shooting of case that is connected in the shooting control module is recorded on automatic control circuit;

Starting switch is the lockhole switch, is arranged on the place under lockhole coverage sheet on lockhole, covers sheet with lockhole when mounted the button of switch is pushed down, and the lockhole switch contact is drawn with wire;

shooting with video-corder before case in control module shooting, to record automatic control circuit be the normal phase input end that signal leading arrives first order operational amplifier, the negative phase end of first order operational amplifier is connected a gain adjusting resistance with the output of first order amplifier, the output of first order amplifier is connected to the normal phase input end of second level amplifier, comparison bleeder circuit by two resistance series connection, two resistance series connection points connect the negative phase end of second level amplifier, bleeder circuit one termination live wire, other end grounding wire, the output of second level amplifier is namely that the output of early warning electronic circuit has connected video camera recorder,

the sound equipment caution system is the base stage that the output of voice sheet has connected preposition amplifier tube, the grounded emitter of preposition amplifier tube, colelctor electrode is connected on the base stage of the PNP pipe that forms power amplifier, the base stage that forms the PNP pipe of power amplifier has also connect an end of power amplifier level load resistance, the load resistance other end connects to form the base stage of the NPN pipe of power amplifier, the PNP pipe that forms power amplifier manages with NPN commissure electric capacity of central point series winding that emitter stage is connected, one end of another termination loudspeaker of commissure electric capacity, the other end grounding wire of loudspeaker, the NPN pipe Integrated electrode that forms power amplifier is received on the electronic switch of shooting with video-corder in the unit.

2. electronics automatic camera protector according to claim 1 is characterized in that: the NPN pipe that forms power amplifier in sound system is all large power triode with the PNP pipe, withstand voltage 100V.

3. electronics automatic camera protector according to claim 1 is characterized in that: the dual-stage amplifier that before case, shooting is recorded in automatic control circuit is 324.

4. electronics automatic camera protector according to claim 1 is characterized in that: shoot with video-corder the rest-set flip-flop that also has band to show in control module, and time controller, shooting manually boots switch, video camera recorder.

5. electronics automatic camera protector according to claim 1, it is characterized in that: being connected on the branch road of penetrating with " lightning protection overvoltage backup " on the snubber base stage in modular power supply is the series circuit of a voltage-stabiliser tube and several diodes, the number of diode series connection is one, or more than one.

6. electronics automatic camera protector according to claim 1 is characterized in that: in diode and resistance series arm in modular power supply between three end integrated circuit earth terminals and ground wire, the number of diode series connection is one, or more than one.

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