CN203276439U - Video taking guard capable of protecting lock hole - Google Patents

Abstract

A video taking guard capable of protecting a lock hole belongs to the technical field of automatic control and comprises a security door, a double-terminal protection power supply, a lock hole covering sheet, a video taking control unit, a starting switch and an audio system, wherein the lock hole covering sheet is made into a bottle cover shape and joined with a flange disk with the starting switch, so as to completely cover the lock hole and particularly protect the lock hole. When a person tries to break the lock hole, a touch signal can be generated once the person touches the lock hole covering sheet, the video taking control unit and the audio system are started, and an alarm is emitted. If the person continues breaking the lock hole, the lock hole covering sheet looses, the starting switch changes and a starting signal is generated, the video taking control unit and the audio system are all started to take videos and alarm. The mated double-end protection type power supply has very good anti-lightning and overvoltage protection effect and wide application range, and thus the performance of the guard type products is furthermore perfected.

Description

The protection lockhole shoot with video-corder guard's device

Technical field

Belong to the automatic control technology field.

Background technology

Family is the bay of happiness, and antitheft is the important topic of household safe for a long time.

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.

At present, the electric power output voltage of institute's adapted is not very high, and overvoltage capabilities is poor.from some technical information, the method that a lot of devisers have proposed to be added in by triode the integrated circuit input improves electric pressure, although such way can solve the ability that improves input voltage, but lightning protection effect not enough, if employing anti-thunder tube, the protection of anti-thunder tube when puncturing is to earth short, cause the load of prime excessive, thereby negative effect arranged, but thunderbolt is waited also non insurance of higher transient state situation, easily cause damage, so can't be directly used in the important electrical equipment of a class such as security device, because this electric appliances has heavy function and mission, and power supply is perishable Focusing on components, so wish that it is very necessary stopping each dead angle that may exist.

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

Summary of the invention

Fundamental purpose of the present invention is to utilize the prior art achievement, proposes new measure, becomes 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, the protection lockhole shoot with video-corder guard's device by antitheft door, two end protection power supply, lockhole are covered sheet, shoot with video-corder control module, starting switch, several parts of sound system form jointly.

Wherein: the two end protection power supply is the voltage-limiting protection unit, overvoltage fast tripping protection unit, and the input end overvoltage protection triggers branch road, and the output terminal overvoltage protection triggers branch road, and voltage regulation unit forms jointly.

The voltage-limiting protection unit has connected two-way with the output of rectification unit, and one the tunnel is to have connected the voltage-limiting protection transistor collector; Another road is an end of resistance in a voltage-limiting protection unit, and the other end of this resistance has connected the base stage of voltage-limiting protection triode; The emitter of voltage-limiting protection triode is the output of this unit, has been connected on the base stage of voltage-limiting protection triode with the positive pole of a stabilivolt, the minus earth of this stabilivolt.

Overvoltage fast tripping protection unit is comprised of overvoltage fast tripping protection triode and peripheral element: the base stage that connects the voltage-limiting protection triode with the collector of overvoltage quick-break triode; overvoltage fast tripping protection transistor emitter ground connection; overvoltage quick-break transistor base has connected an end of a base resistance by name, and the other end of base resistance has connected the output terminal of input end overvoltage protection triggering branch road and output terminal overvoltage protection triggering branch road.

It is by a stabilivolt and the branch road that diode is in series that the input end overvoltage protection triggers branch road; the positive terminal of this branch road stabilivolt has been connected to the emitter of voltage-limiting protection triode; the other end is namely the output terminal of this branch road, has connected the base resistance of overvoltage fast tripping protection triode.

It is by a stabilivolt and the branch road that diode is in series that the output terminal overvoltage protection triggers branch road; the positive terminal of this branch road stabilivolt has been connected to the output terminal of voltage regulation unit; the other end is namely the output terminal of this branch road, and this end has connected the base resistance of overvoltage fast tripping protection triode.

Voltage regulation unit is comprised of 78 serial integrated circuit and peripheral element: the emitter-base bandgap grading that has connected the voltage-limiting protection triode with the input end of 78 serial integrated circuit; the 78 serial integrated circuit earth terminals ground connection after a resistance of having contacted; output terminal has connected an end of a resistance, and the other end of this resistance is connected to 78 serial integrated circuit earth terminals.

The output terminal of 78 serial integrated circuit is last output terminals, and the power supply input of each circuit part all is connected on herein.

It is to be positioned on the lockhole top that lockhole is covered sheet, has made the bottle cap shape, and what dock with the bottle cap sheet is a kind of ring flange, and the ring flange chassis is fixed on door, and the mode that the bottle cap sheet is connected with ring flange adopts the engage thread connection.

An end with a wire connects lockhole coverage sheet, and before other end connection case, the automatic control unit input end is recorded in shooting.

Starting switch is the lockhole switch, is arranged in ring flange, covers sheet with lockhole when mounted the button of switch is pushed down, and the lockhole switch contact is drawn with wire, connects to shoot with video-corder unit and sound system.

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 ground 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, collector 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 pull-up resistor, the pull-up resistor 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 is connected, one end of another termination loudspeaker of commissure electric capacity, the other end ground 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, 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.

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

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

5, in sound system, loudspeaker power used is 0.5W.

6, the stabilivolt that in the two end protection power supply, the input end overvoltage protection triggers in branch road and output terminal overvoltage protection triggering branch road is to be in series by many diodes.

7, it is to connect with screw that the lockhole of having made the bottle cap shape is covered being connected between sheet and ring flange.

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

One, before this, the inventor is studied antitheft 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 propulsion system 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 antitheft 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 job record.

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, the two end protection power supply has important effect in the present invention; its circuit is explained as follows: when 1, thunderbolt being arranged; usually that power supply is perishable the time; avoid as common household electrical appliances such as TV normally take the to cut off the power supply mode in source; because these class household electrical appliances are made interim power down process, can not produce serious consequence.But as the specialities of security personnel's class, will become security personnel as resolute power down source blank, be first emphasis of the present invention so improve lightning protection effect.And that the present invention has the reason of good anti-lightning effect is as follows:

The first, voltage-limiting protection unit and overvoltage fast tripping protection unit trigger the branch road synergy with input end and output terminal overvoltage protection and have jointly formed " overvoltage fast tripping protection function ", and excellent performance has very strong lightning protection overvoltage capabilities.

(1), form the principle of voltage regulation unit input end overvoltage protection:

If thunderbolt and when causing rectification output end too high and after surpassing the door of underwater pipeline stabilizing in the triggering branch road of voltage regulation unit input end (in Fig. 4 907); fast tripping protection triode (in Fig. 4 903) conducting rapidly; immediately to the base stage short circuit of voltage-limiting protection triode (in Fig. 4 906); make the complete no-output of this pipe; three end integrated circuit input no-voltages form lightning protection overvoltage " quick-break " protection.

(2), form the principle of voltage regulation unit output terminal overvoltage protection: press output if output terminal has to gush; and surpassed after the stabilivolt door that the output terminal overvoltage protection triggers branch road (in Fig. 4 913) after value; equally with or a door mode trigger overvoltage fast tripping protection triode (in Fig. 4 903) conducting; cause the base stage short circuit of voltage-limiting protection triode (in Fig. 4 906); make the complete no-output of this pipe; three end integrated circuit input no-voltages form lightning protection overvoltage fast tripping protection.

(3), the automatic restorability of overvoltage fast tripping protection triode is good, the situation that can follow the tracks of rapidly " thunderbolt overvoltage ".Reason is after producing fast tripping protection, voltage-limiting protection triode (in Fig. 4 906) no-output, and overvoltage fast tripping protection triode (in Fig. 4 903) will be by amplifying or state of saturation change cut-off state into because of triggerless voltage.Namely revert to voluntarily open-circuit condition, if again be struck by lightning, again start, form protection, until output voltage is normal value.

(4), " fast tripping protection unit " relevant elements, only have thunderbolt or just work during overvoltage, so be not easy to damage, all be in a kind of guard mode constantly.

Its reason is power output end when being normal condition, overvoltage fast tripping protection triode with trigger branch road and all be in off state, there is no " electrical wear ", can not damage.

The second, the voltage-limiting protection unit has formed the secondary voltage-limiting protection function of anti-lightning protection to thunderbolt, further improves and the protection that has improved voltage regulation unit.

Its reason is, the base stage of voltage-limiting protection triode (in Fig. 4 906) has voltage stabilizing diode over the ground, therefore should pipe output by clamper, pressure limiting has been carried out in shoving that this diode pair thunderbolt produces, and is the further Supplementary and perfect to " fast tripping protection ".

It should be noted that the present invention's designed quick-break and the protection of two kinds of character of pressure limiting, and the duplicate protection of the input of voltage regulation unit and output terminal, main cause one is that thunderbolt is the very strong energy of a kind of destructiveness, particularly occurs in the place close to very from equipment.Design must leave sufficient surplus.The 2nd, protection of different nature and the protection of different key point, can form complementary with strengthen, thereby can largely avoid the accident that exists, thereby improve anti-thunder ability.

2, the reason one that can not damage circuit in the higher place of civil power and period is that civil power can not gush pressure higher than thunderbolt when high, the 2nd, and voltage-limiting protection triode (in Fig. 4 906) is that high inverse-voltage tube has very strong back-pressure value.

3, can be in the main cause of the lower place of civil power and period work: because voltage-limiting protection triode (in Fig. 4 906) is high inverse-voltage tube; so can design the bridge-type output voltage higherly when design; when civil power is low; at this moment bridge-type voltage can not be very low, just can do certain compensation.

4, can adjust the reason of different output voltage stabilizing values.Owing to having increased peripheral element adjustable resistance (in Fig. 4 910 meanwhile 911) in measure, thereby can be on reference voltage, realize that again output voltage adjusts flexibly, realizing the normal voltage required to the accumulator floating charge, as 6.6 volts, 12.8 volts etc.

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 antitheft 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 power supply: (1), anti-thunder and overvoltage protection effect are fine.Main cause one is that two protection key points in source of stable pressure have realized strong protection, and the first key point is that the input end of voltage regulation unit has been realized protection, and the second key point is that the output terminal of voltage regulation unit has been realized protection.The 2nd, be the duplicate protection with " quick-break " and two kinds of character of pressure limiting of the present invention, thereby performance is remarkable.Thereby largely avoided the destruction of thunderbolt.At thunderstorm season, needn't make power down process, institute's adapted equipment can if be used on security personnel's equipment, not guarantee that " security personnel " do not produce blank because thundery sky quits work, and with being difficult to reach this effect uniting of three traditional end integrated circuit and triode.

(2), this line thunder protection effect is more much better than anti-thunder tube commonly used.The lightning protection function that its reason one is anti-thunder tube is this tubular short circuit in couples, and the present invention is and rear class generation quick-break rather than shorted to earth, thus to prime without negative role.The 2nd, the model of the anti-thunder tube that " suctioning through voltage " is low is difficult for having bought; and the model scope of " fast tripping protection " of the present invention diac (906 and 913 in accompanying drawing 4) is extremely wide; be easy to required " suctioning through " magnitude of voltage of supporting one-tenth, be easy to supporting becoming and suction through 30 volts of following protections of voltage.

(3), adapt to widely, than traditional stabilized voltage supply, wider adaptive faculty is arranged, high at the voltage that meets accident, can not damage.And also can work in voltage lower place and period.

(4), there is the voltage stabilizing value of decimal in available adjustment output generation, be convenient to the floating charge of accumulator science.Has simultaneously overcurrent protection.Be fruitful or other electronic products have excellent performance after supporting.

(5), voltage regulation performance is excellent, because it has all advantages of three end integrated regulated power supplies.

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, shoot with video-corder in the unit startup or the door; 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: 127, starting switch extension line; 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); 112, electronic switch; 308, loudspeaker.

Fig. 3 is the starting switch scheme of installation.

In figure: 1, anti-theft safety door; 81, lockhole; 82, ring flange; 101, sheet is covered in the lockhole top; 3, early warning signal takes out the sheet lead-in wire; 89, the printed panel of welding switch; 119, lockhole switch; 127, lockhole switch extension line.

Fig. 4 is the two end protection power circuit diagram.

In figure: 900, rectification output; 902, inclined to one side resistance on the voltage-limiting protection triode; 903, overvoltage fast tripping protection triode; 904: overvoltage fast tripping protection transistor base resistance; 905, voltage-limiting protection voltage stabilizing diode; 906, voltage-limiting protection triode; 908, input end triggers or gate diode; 910, inclined to one side resistance in the output voltage accurate adjustment; 911, inclined to one side resistance under the output voltage accurate adjustment; 912, stabilized voltage supply output: 914, the voltage regulation unit output terminal trigger in branch road or gate diode; 916, output terminal triggers a plurality of diodes that replace in branch road in stabilivolt; 918, input end triggers a plurality of diodes that replace in branch road in stabilivolt.

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

In figure: 36, two end protection 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.

Embodiment

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

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

1, with sheet metal extruding bottle cover structure and ring flange, wherein; Bottle cap structure spare area is greater than lockhole, and Bottle cap structure spare and ring flange attack the negative and positive screw thread mutually, makes Bottle cap structure spare screw in bottleneck structure spare with the method for rotation.

When 2, installing, ring flange is tried to get to the heart of a matter to be affixed on door, its hollow lockhole that exposes.Screw used for flange disc is fixed on door.

3, travel switch is fixed on a bar printing plate and allows lockhole switch and printed panel become one, draw shooting tracer signal amplifying circuit before line connection case from the lockhole switch contact, in the alarm sound system.

The printed panel that 4, will be fixed with the lockhole switch is placed on the ring flange hollow position, with the button cover of lockhole switch to the bottle cap face.

5, rotary bottle cover structural member, and allow this part capping compressing live lockhole shift knob change contact contact situation.

6, the lockhole of having made the bottle cap shape is covered sheet and is wired on the automatic control circuit of shooting with video-corder in control module.

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, by enforcement two end protection power supply shown in Figure 4.

1, selected triode: triode is high inverse-voltage tube.Three end integrated stable voltage circuits; Triggering branch road 907 voltage stabilizing diodes and pressure limiting stabilivolt 905 all should be higher than the voltage regulation unit input value, but too high.Stabilivolt 913 should be exported end value higher than voltage regulation unit, but too not high.

2, adjust voltage regulation unit power supply output valve.Adjust in the accurate adjustment of three end integrated circuit resistance and lower inclined to one side resistance partially, make it the accurate requirement of voltage conforms accumulator floating charge, as 6.6 volts, 12.8 volts etc.Its rule is that lower inclined to one side resistance 910 is larger, and output voltage is higher, otherwise lower.

3, detect and debug voltage regulation unit overvoltage protection parameter.

(1), detect and debug voltage regulation unit input end overvoltage fast tripping protection parameter.

The transformer primary side that breaks, the voltage regulation unit output terminal that breaks triggers branch road, and voltage regulation unit input end pressure limiting stabilivolt breaks; 913; With the oscillographic source of stable pressure input end that is connected on, click rectifier terminal with the DC voltage of 100 volts, oscilloscope display is that voltage descends rapidly, is even zero.After the high pressure of 100 volts removed, it is normal that magnitude of voltage recovers.Otherwise should adjust the stabilivolt parameter in input end triggering branch road.

(2), detect and debug voltage regulation unit input end compression limiter and press parameter.

The transformer primary side that breaks, the output terminal that breaks triggers branch road 913; Be connected on the source of stable pressure input end with voltage table, click rectifier terminal with the DC voltage of 100 volts, index shown in voltage table is certain value.Otherwise should transfer the stabilivolt 905 in the voltage-limiting protection unit.

(3), detect and debug voltage regulation unit output terminal overvoltage fast tripping protection parameter.

The transformer primary side that breaks, the input end that breaks triggers branch road stabilivolt 907; Stabilivolt 905 in compression limiter breaks; Output and the output terminal of short circuit three end integrated circuit are connected on the source of stable pressure input end with voltage table, click the voltage regulation unit input end with the DC voltage of certain voltage, and shown in voltage table, voltage will reduce rapidly at this moment.Otherwise should transfer output terminal to trigger stabilivolt value in branch road.

Claims (7)

1. The protection lockhole shoot with video-corder guard's device, it is characterized in that: by antitheft door, the two end protection power supply, lockhole is covered sheet, shoots with video-corder control module, starting switch, several parts of sound system form jointly;

   Wherein: the two end protection power supply is the voltage-limiting protection unit, overvoltage fast tripping protection unit, and the input end overvoltage protection triggers branch road, and the output terminal overvoltage protection triggers branch road, and voltage regulation unit forms jointly;

   The voltage-limiting protection unit has connected two-way with the output of rectification unit, and one the tunnel is to have connected the voltage-limiting protection transistor collector; Another road is an end of resistance in a voltage-limiting protection unit, and the other end of this resistance has connected the base stage of voltage-limiting protection triode; The emitter of voltage-limiting protection triode is the output of this unit, has been connected on the base stage of voltage-limiting protection triode with the positive pole of a stabilivolt, the minus earth of this stabilivolt;

   Overvoltage fast tripping protection unit is comprised of overvoltage fast tripping protection triode and peripheral element: the base stage that connects the voltage-limiting protection triode with the collector of overvoltage quick-break triode, overvoltage fast tripping protection transistor emitter ground connection, overvoltage quick-break transistor base has connected an end of a base resistance by name, and the other end of base resistance has connected the output terminal of input end overvoltage protection triggering branch road and output terminal overvoltage protection triggering branch road;

   It is by a stabilivolt and the branch road that diode is in series that the input end overvoltage protection triggers branch road, the positive terminal of this branch road stabilivolt has been connected to the emitter of voltage-limiting protection triode, the other end is namely the output terminal of this branch road, has connected the base resistance of overvoltage fast tripping protection triode;

   It is by a stabilivolt and the branch road that diode is in series that the output terminal overvoltage protection triggers branch road, the positive terminal of this branch road stabilivolt has been connected to the output terminal of voltage regulation unit, the other end is namely the output terminal of this branch road, and this end has connected the base resistance of overvoltage fast tripping protection triode;

   Voltage regulation unit is comprised of 78 serial integrated circuit and peripheral element: the emitter-base bandgap grading that has connected the voltage-limiting protection triode with the input end of 78 serial integrated circuit, the 78 serial integrated circuit earth terminals ground connection after a resistance of having contacted, output terminal has connected an end of a resistance, and the other end of this resistance is connected to 78 serial integrated circuit earth terminals;

   The output terminal of 78 serial integrated circuit is last output terminals, and the power supply input of each circuit part all is connected on herein;

   It is to be positioned on the lockhole top that lockhole is covered sheet, has made the bottle cap shape, and what dock with the bottle cap sheet is a kind of ring flange, and the ring flange chassis is fixed on door, and the mode that the bottle cap sheet is connected with ring flange adopts the engage thread connection;

   An end with a wire connects lockhole coverage sheet, and before other end connection case, the automatic control unit input end is recorded in shooting;

   Starting switch is the lockhole switch, is arranged in ring flange, covers sheet with lockhole when mounted the button of switch is pushed down, and the lockhole switch contact is drawn with wire, connects to shoot with video-corder unit and sound system;

   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 ground 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, collector 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 pull-up resistor, the pull-up resistor 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 is connected, one end of another termination loudspeaker of commissure electric capacity, the other end ground 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. Protection lockhole according to claim 1 shoot with video-corder guard's device, it is characterized in that: 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.
3. Protection lockhole according to claim 1 shoot with video-corder guard's device, it is characterized in that: the two-stage amplifier that before case, shooting is recorded in automatic control circuit is 324.
4. Protection lockhole according to claim 1 shoot with video-corder guard's device, it 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.
5. Protection lockhole according to claim 1 shoot with video-corder guard's device, it is characterized in that: in sound system, loudspeaker power used is 0.5W.
6. Protection lockhole according to claim 1 shoot with video-corder guard's device, it is characterized in that: in the two end protection power supply, to trigger branch road be to be in series by many diodes with stabilivolt in output terminal overvoltage protection triggering branch road to the input end overvoltage protection.
7. Protection lockhole according to claim 1 shoot with video-corder guard's device, it is characterized in that: it is to connect with screw that the lockhole of having made the bottle cap shape is covered being connected between sheet and ring flange.

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