CN203192126U - Camera shooting warning device possesses over-current protection - Google Patents

Abstract

A camera shooting warning device possesses over-current protection belongs to the electronic technology field. The device is formed by an antitheft door, a double-end protection type power supply, a lock hole covering sheet, a shooting and recording control unit, an alarm starting switch, a timing feedback circuit, a sound equipment system and a telephone alarm. The used double-end protection type power supply possesses an advantage of a 78 series, greatly increases a lightning protection ability and broadens a fluctuation capability function to commercial power. The lock hole covering sheet completely covers the lock hole and the alarm starting switch. When a person commits a crime through the lock hole and the hand touches the lock hole covering sheet, a touch signal is generated so that the shooting and recording control unit is started to carry out shooting, recording and push the sound equipment system. When the lock hole covering sheet and the lock hole are loosened, a contact of the alarm starting switch below the lock hole covering sheet changes so as to generate an alarm starting signal. The timing feedback circuit is used to reliably start the shooting and recording control unit and the alarm sound equipment system. After the device is applied, performance of the antitheft safety door is further increased.

Description

The shooting warning device that overcurrent protection is arranged

Technical field

Belong to electronic technology field.

Background technology

Family is the bay of happiness, and security personnel's equipment of protection man generally all is that anti-theft safety door is combined with alarm, though alarm can remedy the deficiency of anti-theft safety door to a certain extent, both are in conjunction with many weak points are still arranged:

1, supporting electric power output voltage 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; though 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 to higher transient state situations such as thunderbolt non insurance also; 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 emphasis parts, so wish that it is very necessary stopping each dead angle that may exist.

2, the alarm kind is a lot, the security personnel's equipment that cooperates with alarm is also a lot, the camera monitoring device accounts for significant proportion in the base, but for general family, possibility all was useless shooting record in one month, 1 year, just began the record of making a video recording when therefore mostly selecting event has taken place, though such function is very important, but the situation before can't the understanding case also becomes a kind of very big deficiency.

3, the starting of Bao Jinging is the key element of alarm, and whether reliably it directly relate to the shooting starting of reporting to the police in the present invention, or malfunction is not arranged.Show after deliberation, address this problem, must work hard simultaneously aspect machinery and two in the circuit, cooperatively interact, the effect that can obtain, but to use what kind of physical construction, and what kind of circuit of joining be only best disposal route, this also is an important topic that is worth research.

In sum, existing antitheft series products also needs further lifting to a great extent.

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, and when there is something special, can onsite alarming and shooting record.

The technical solution used in the present invention is:

1, there is the shooting of overcurrent protection to guard against device by antitheft door, two end protection type power supply, lockhole is covered sheet, shoots with video-corder control module, the warning starting switch, the timing feedback circuit, sound system, several parts of telephone alarm are formed jointly.

Wherein: two end protection type source of stable pressure 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 is formed 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 the 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, the minus earth of this stabilivolt with the positive pole of a stabilivolt.

Overvoltage fast tripping protection unit is made up 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 the emitter of voltage-limiting protection triode; the other end namely is 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 the output terminal of voltage regulation unit; the other end namely is 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 made up 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 behind the resistance of having contacted; output terminal has connected an end of a resistance, and the other end of this resistance is connected 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 a sheet metal that lockhole is covered sheet, is positioned on the lockhole top, and warning starting switch and lockhole are covered fully, is connected on lockhole with a lead and covers on the sheet, and the lead other end is outwards drawn, and is connected on the preceding shooting record of the case automatic control circuit in the shooting control module.

The warning starting switch is the lockhole switch, is installed in the place under the lockhole coverage sheet on the lockhole, covers sheet with lockhole when mounted the button of switch is pushed down, and the lockhole switch contact is drawn with lead, is connected in the regularly feedback circuit input.

The timing feedback circuit: with the base stage that has been connected on first triode behind resistance of the lead-in wire of warning starter series connection, the grounded emitter line of this triode, collector has connect two-way, one of be to join with power supply after having connect a resistance; Two are ends that connect a resistance, another termination of this resistance the base stage of second triode.

Second transistor collector connect two-way, one of be to have connected to be connected on power supply behind the resistance; Two are ends that connect a feedback capacity, the other end of this feedback capacity has been connected and has been connected on the base stage of first triode behind a diode and the resistance, also connects a resistance between this end of this feedback capacity and the ground.

Second transistor collector outwards exported and drawn signal wire, draw signal wire connect on record before in the input of the input of shooting record automatic control circuit and sound system.

Shoot with video-corder control module by case before shooting record automatic control circuit, the rest-set flip-flop that band shows, time controller, shooting manually boots switch, video camera recorder is formed jointly.

Shooting is recorded automatic control circuit by the prestage interstage amplifier section before the case, the power amplifier level, and several parts of electronic switch are formed jointly.

Prestage mainly is made up of a triode, and with the base stage of the triode input end as this unit, collector connects power supply, and emitter has connected the input end of interstage amplifier section.

Interstage amplifier section is made up of several not gates and relevant peripheral element.

With the input end of first not gate in the interstage amplifier section as input end at the corresponding levels, and connected the input end of second not gate with the output terminal of first not gate in this grade, be connected to the input end of last not gate of interstage amplifier section as method, last non-gate output terminal is the output terminal of interstage amplifier section, and the output terminal of each not gate and input end are connected with a resistance; The output terminal of this grade has connected the input end of power amplifier.

The power amplifier level is by two not gates and one or form.

With the connected input of second not gate in this level of the input of first not gate in the power amplifier level, the output of second not gate has connected or an input of door, and the input of first not gate connects the output of interstage amplifier section; Or the output of door is the output of power amplifier level.

In the power amplifier level or three inputs of door connected the output terminal of time control respectively, the output terminal of warning starting switch, shooting manually boots the output terminal of switch.

The output power amplifier level or door has connected three the tunnel, and the first via has connected the input of electronic switch, and the second the tunnel has connected the input of the rest-set flip-flop of band demonstration; Third Road has connected time controller control end.

The output of electronic switch has connected video camera recorder.

Sound system is by the pronunciation sheet, operational amplifier and peripheral element, and loudspeaker is formed jointly.

The positive terminal of operational amplifier is received in the output of pronunciation sheet, the end of oppisite phase ground connection of operational amplifier, the output of operational amplifier has connect two-way, one the tunnel has connected an end of audio frequency adjustment resistance, audio frequency is adjusted the resistance other end and is connected audio frequency adjustment electric capacity, and audio frequency is adjusted electric capacity other end ground connection, and another road has connected the positive pole of commissure electric capacity, commissure electric capacity negative pole extremely links to each other with one of loudspeaker, another utmost point ground connection of loudspeaker.

2, lockhole is covered the signal lead-out mode of sheet and is, weld on the silver-plated weld tabs with an end of a lead, silver-plated weld tabs again with the rivet riveting on lockhole coverage sheet.

3, the not gate in the shooting record automatic control circuit adopts integrated circuit 4069 before the case.

4, the operational amplifier in the sound system is integrated circuit LM386; Loudspeaker is the loudspeaker that power is 0.5W, and its internal resistance is 8 Ω.

5, the feedback capacity in the timing feedback circuit is the electrodeless electric capacity that is in series with two electrochemical capacitor positive poles.

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

7, commutation diode is the heavy-duty diode of usefulness in the two end protection type stabilized voltage supply.

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

One, before this, the inventor studies 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 the 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 remedy when automatic system goes wrong, so antitheft door can be made lockhole semiclosed processing, its meaning is, lockhole is covered during normal the use, only during out of order special circumstances, just lockhole is covered sheet and is opened.

Two, it is reported, 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 all is 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 mostly be suspectable people with the people that hand is taken off lid.The record so should make a video recording, and be the important preceding 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 to continue, stop automatically taking.Two be when automatic camera records, to have recorded simultaneously the time of taking place at that time, three be occurrence record after, the Presentation Function of record before the case will be arranged, the overwriting situation once took place in the people in the family of announcement, to watch.

Four, can preset with the rule of time period and initiatively make a video recording, namely be artificially on one's own initiative with time set on a certain period, this moment, video camera recorded ambient conditions with automatic camera, rather than will contact the lockhole cover plate.This situation mainly is 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, the shooting of the overall process after crime is produced.

Six, 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 hole top cover plate (among Fig. 1 101), the touch signal that has taken out human body enters the polystage amplifier amplification that not gate forms (among Fig. 1 105, to 108 etc.) by emitter follower (among Fig. 1 102) input then, enter at last or door (among Fig. 1 111) input, enter electronic switch (among Fig. 1 112) at last, open video camera work (among Fig. 1 113) at last.If stop to continue, no touch signal then, so electronic switch is not open-minded, the camera system non-transformer is not worked.

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

Produce the principle of shooting record overall process: although the back hand of forcing open the door has left lockhole top cover plate, but above the lockhole and the alarm switch contact that is pressed under the cover plate is not oppressed by cover plate, variation has taken place, and switch 119 is closed among this Fig. 1, so opened the video camera job record.

Behind the shooting record displaying principle is arranged before the generation case: 118 is a kind of rest-set flip-flops with demonstration among Fig. 1, 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 LEDs can luminous demonstration.

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

Seven, 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 warning system work simultaneously.

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

Nine, the timing feedback circuit has played vital role in the present invention, and to this, circuit has following explanation:

When not receiving signal, first transistor collector is high-order, and the current collection of second triode is very low, not output signal.

When on off state changes, signal has been sent to first triode NPN base stage, this moment, current collection was very low, second transistor collector is high, output signal, meanwhile, because the positive feedback branch that electric capacity is formed acts on simultaneously, first transistor base has been added positive feedback voltage, no matter whether there is signal to be input to the base stage of first triode, it is high that second transistor collector is always, and signal output is arranged all the time, arrived certain hour after, feedback branch electric capacity differential is full of, feedback branch lost efficacy, so positive feedback is regularly, was not eternal.

For this circuit also should illustrate following some:

So 1 will add positive feedback branch, 2 meanings are arranged, (1), relaxed requirement to switch, namely be that switch can be by of bonding, also can be button-type, and the power of contact is not had influence, so can adopt miniature, to reduce the switch mounting hardness, increase the attractive in appearance of door simultaneously.(2), sensitivity and the reliability of the starting of reporting to the police have been improved.If someone is cracking lockhole, (referring to unclamp the behavior of the screw on the lockhole upper cover plate), switch has produced displacement, and latching circuit starts immediately, sends initiating signal.

2, this feedback branch is very reliable.Be embodied in following two aspects, first aspect is that feedback procedure is reliable, and this moment, second pipe collector was high, and feedback branch electric capacity is charging process, and the collector resistance of second pipe is fed back the charging of feedback capacity differential, finishes until differential.Second aspect is that the rejuvenation of feedback is reliable, when first transistor base is input as when low, namely be second triode when full, the positive pole of feedback capacity links to each other with ground rapidly, by saturated triode ground wire is discharged, because saturated pipe internal resistance is very little, discharge time is very short, fully can satisfy the necessary preparation of feedback next time.

3, feedback capacity is little has formed charging rate altogether with feedback resistance, adjustable flexibly, is adapted to dissimilar switches.

4, electric capacity selects electric capacity capacious in the feedback branch, the debugging surplus is bigger, be that the electric leakage system is little and choose with electrodeless electric capacity, feedback branch is more stable, if but select electrodeless electric capacity capacious for use, sometimes be difficult for looking for, and price is higher, so proposed to become electrodeless method with electrochemical capacitor, choose the method that the negative pole of having used two electrochemical capacitors is connected together among the figure, adopt this method after, capacitance can conveniently make up, and leakage coefficient can improve a lot of a lot, in this programme because the positive feedback circuit is arranged, to the stability of raising circuit highly significant.

5, to have added the reason of diode be when on off state changes, when signal has been added in the base stage of first pipe, not produce loss of signal branch road to positive feedback branch.

Ten, power supply is a part and parcel, and existing spy is explained as follows power circuit:

When 1, thunderbolt being arranged, usually be power supply 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, it is blank to become security personnel as resolute power down source, is first emphasis of the present invention so improve lightning protection effect.And that the present invention has the reason of good anti-thunderbolt 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 formed " overvoltage fast tripping protection function " jointly, 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 (among Fig. 5 907); fast tripping protection triode (among Fig. 5 903) conducting rapidly; immediately to the base stage short circuit of voltage-limiting protection triode (among Fig. 5 906); make this manage complete no-output; three end integrated circuit input no-voltage forms 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 after having surpassed the stabilivolt door that the output terminal overvoltage protection triggers branch road (among Fig. 5 913) back value; equally with or a door mode trigger overvoltage fast tripping protection triode (among Fig. 5 903) conducting; cause the base stage short circuit of voltage-limiting protection triode (among Fig. 5 906); make this manage complete no-output; three end integrated circuit input no-voltage forms 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 " thunderbolt overvoltage " rapidly.Reason is after producing fast tripping protection, voltage-limiting protection triode (among Fig. 5 906) no-output, and overvoltage fast tripping protection triode (among Fig. 5 903) will be by amplifying or state of saturation change cut-off state into because of triggerless voltage.Namely reverting to open-circuit condition voluntarily, if be struck by lightning again, start again, form protection, is normal value until output voltage.

(4), " fast tripping protection unit " relevant elements, have only 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, do not have " electrical wear ", can not damage.

The second, the voltage-limiting protection unit has formed the secondary voltage-limiting protection function of anti-lightning strike 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 (among Fig. 5 906) 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 further replenishing with perfect " 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 from the place of equipment close to very.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 be higher than thunderbolt when high and gushes pressure, the 2nd, and voltage-limiting protection triode (among Fig. 5 906) 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 (among Fig. 5 906) is high inverse-voltage tube; so when design, can design the bridge-type output voltage higherly; 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 increased peripheral element adjustable resistance (among Fig. 5 910 meanwhile 911) in the 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, after the invention process, anti-theft safety door and alarm have been realized the combination of science, three kinds of function collection are one, 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 security personnel's performance of anti-theft safety door all sidedly, enriched the kind of antitheft door.

2, shooting record performance excellence.The one, record is given prominence to the key points before the case.The 2nd, after being arranged, record can show the owner of announcement automatically, can " not leak visit ".The 3rd, cases has taken place to do can record overall process.The 4th, shooting records various ways.The 5th, at record time of generation is arranged the time.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 in return visit, watch a lot of useless impunities general records).Thereby for understanding the family public security present situation, very important positive role is arranged.

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

4, 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, at any time all be in 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 influence normal habits and customs, can not produce malfunctioning situation.

5, the amplifying circuit of shooting record automatic control unit is outstanding before the case, has guaranteed the reliable and sensitive of core circuit.Reason one is that emitter follower can realize that the coupling between lockhole cover plate and the amplifier takes out signal reliably after as impact damper well.The 2nd, the sensitivity at different levels of amplifier is adjustable flexibly, and very high amplification coefficient is arranged.The 3rd, functional level has good shaping operation, realized the digitizing output conversion of (0) with (1) of standard, thereby resolving power is very strong; It is big to export energy simultaneously, and there is very strong triggering ability in subordinate.

6, 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.

7, warning gives great volume, and can produce the deterrence effect.

8, relax requirement to switch, reduced the switch mounting hardness, improved sensitivity and the reliability of the starting of reporting to the police.

Description of drawings

Fig. 1 is shooting record automatic control circuit figure.

Among the figure: 3, lockhole is covered the tab terminal that sheet is; 102, the input prestage emitter follower in the shooting record automatic control unit before the case; 103, chopped-off head sensitivity adjustment resistance in the interstage amplifier section of the preceding shooting record of case automatic control unit; 105, the chopped-off head not gate in the interstage amplifier section of shooting record automatic control unit before the case; 107, the final stage sensitivity adjustment resistance in the interstage amplifier section of shooting record automatic control unit before the case; 108, the final stage not gate in the interstage amplifier section of shooting record automatic control unit before the case; 109, first not gate of power amplifier level in the preceding shooting record of the case automatic control unit; 110, second not gate of power amplifier level in the preceding shooting record of the case automatic control unit; 111, startup or the door of making a video recording before the case and recording power amplifier level in the automatic control circuit; 112, electronic switch; 113, video camera recorder; 115,, there is the rest-set flip-flop of demonstration in generation; 116, time controller; 119, warning starting switch; 120, artificial gauge tap.

Fig. 2 is sound system circuit figure.

Among the figure: 119, warning starting switch; 47, the electronic switch output in the shooting record automatic control circuit; 50, pronunciation sheet; 52, enlargement factor is adjusted resistance; 53, operational amplifier; 56, audio frequency is adjusted resistance; 57 commissure electric capacity; 55, loudspeaker.

Fig. 3 is warning starting switch scheme of installation.

Among the figure: 1, lockhole is covered sheet; 2, silver-plated weld tabs; 3, lockhole is covered the tab terminal on the sheet; 4, lockhole is covered the screw hole on the sheet; 5, lockhole; 6, the printed panel of welding warning starting switch; 8, warning starting switch contact extension line; 9, on the anti-theft safety door fixedly lockhole cover the screw hole of sheet; 10, the screw of fixing welding warning starting switch printed panel; 101, anti-theft safety door; 119, warning starting switch.

Fig. 4 is timing feedback circuit figure.

Among the figure: 8, warning starting switch contact extension line; 531, timing feedback input resistance; 532, first order triode in the timing feedback; 533, the collector resistance of first order triode; 534, isolation resistance between the two-stage triode; 535, second level triode in the timing feedback; 536, the collector resistance of second level triode; 537, feedback capacity; 538, discharge resistance; 539, feedback resistance; 540, feedback diode; 545, timing feedback output line; 546, become the electrochemical capacitor of electrodeless electric capacity; The output of 550 timings feedback connects the diode of shooting record automatic control circuit; 552, the output of timing feedback connects the diode of sound system.

Fig. 5 is two end protection type power circuit diagram.

Among the 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 the branch road or gate diode; 916, output terminal triggers a plurality of diodes that replace in the branch road in the stabilivolt; 918, input end triggers a plurality of diodes that replace in the branch road in the stabilivolt.

Fig. 6 is shooting record and the mutual relationship figure partly that reports to the police.

Among the figure: 20, two end protection type power supply; 101, lockhole is covered sheet; 119, warning starting switch; 120, artificial gauge tap; 200, timing feedback; 201, shooting tracer signal amplifying circuit before the case; 111, startup or the door of making a video recording before the case and recording power amplifier level in the automatic control circuit; 112, electronic switch; 113, video camera recorder; 202, sound system.

Embodiment

Fig. 1 and Fig. 6 have described concrete embodiment of the present invention.

One, the lockhole that the lockhole top is installed is covered sheet and warning starting switch, as shown in Figure 3.

1, becomes the garden lid bigger than lockhole to become lockhole of the present invention with a metal material processing and cover sheet.

A silver-plated weld tabs that has welded lead is covered on the sheet at lockhole with the right riveting of riveting.

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 mounting hole of the shop front adopts tapping.

3, the micro press-key switch is welded on the bar printing plate allows switch and printed panel become one, be installed between cover plate and the door, when three screw precessions will fixing were fixed on, cover plate should be in keyswitch is urged to and make normally closed contact in the position that disconnects.When outside back-out screw, keyswitch can be in and not be subjected to oppressing, and its normally closed contact still reverts to normally closed position, the extension line of its contact connects the input of timing feedback circuit, and the output of timing feedback is through the preceding shooting record automatic control circuit of connection case respectively behind the diode OR gate and sound system.

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

1, press Fig. 1 welding, active is adopted integrated circuit 4069 among the figure.It is the kind of positive signal that startup or door are selected three input and output for use.

2, welded back inspection and debugging to function:

During A, hand contact lockhole top cover plate, video camera recorder work stops after hand leaves automatically, otherwise should adjust sensitivity adjustment resistance in the amplifier (among Fig. 1 103 or 107 etc.).

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, pilot lamp is bright in the rest-set flip-flop that band shows, and the time controller has the corresponding time, otherwise should check relevant part.

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

Four, the enforcement of timing feedback: welding as shown in Figure 3, adjust feedback capacity, make feedback time reach requirement.

Five, implement two end protection type power supply by Fig. 5:

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

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

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

(1), detects and debugs 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 100 volts DC voltage, it is that voltage descends rapidly that oscillograph shows, even is zero.After 100 volts high pressure removed, it is normal that magnitude of voltage recovers.Otherwise should adjust the stabilivolt parameter in the input end triggering branch road.

(2), detect and debug voltage regulation unit input end pressure limiting unit 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 100 volts DC voltage, index shown in the 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 the pressure limiting unit 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 voltage will reduce rapidly shown in the voltage table at this moment.Otherwise should transfer output terminal to trigger stabilivolt value in the branch road.

Claims (7)

1. the shooting warning device of overcurrent protection is arranged, it is characterized in that: by antitheft door, two end protection type power supply, lockhole is covered sheet, shoots with video-corder control module, the warning starting switch, the timing feedback circuit, sound system, several parts of telephone alarm are formed jointly;

Wherein: two end protection type source of stable pressure 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 is formed 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 the 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, the minus earth of this stabilivolt with the positive pole of a stabilivolt;

Overvoltage fast tripping protection unit is made up 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 the emitter of voltage-limiting protection triode, the other end namely is 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 the output terminal of voltage regulation unit, the other end namely is 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 made up 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 behind the resistance of having contacted, output terminal has connected an end of a resistance, and the other end of this resistance is connected 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 a sheet metal that lockhole is covered sheet, is positioned on the lockhole top, and warning starting switch and lockhole are covered fully, is connected on lockhole with a lead and covers on the sheet, and the lead other end is outwards drawn, and is connected on the preceding shooting record of the case automatic control circuit in the shooting control module;

The warning starting switch is the lockhole switch, is installed in the place under the lockhole coverage sheet on the lockhole, covers sheet with lockhole when mounted the button of switch is pushed down, and the lockhole switch contact is drawn with lead, is connected in the regularly feedback circuit input;

The timing feedback circuit: with the base stage that has been connected on first triode behind resistance of the lead-in wire of warning starter series connection, the grounded emitter line of this triode, collector has connect two-way, one of be to join with power supply after having connect a resistance; Two are ends that connect a resistance, another termination of this resistance the base stage of second triode;

Second transistor collector connect two-way, one of be to have connected to be connected on power supply behind the resistance; Two are ends that connect a feedback capacity, the other end of this feedback capacity has been connected and has been connected on the base stage of first triode behind a diode and the resistance, also connects a resistance between this end of this feedback capacity and the ground;

Second transistor collector outwards exported and drawn signal wire, draw signal wire connect on record before in the input of the input of shooting record automatic control circuit and sound system;

Shoot with video-corder control module by case before shooting record automatic control circuit, the rest-set flip-flop that band shows, time controller, shooting manually boots switch, video camera recorder is formed jointly;

Shooting is recorded automatic control circuit by the prestage interstage amplifier section before the case, the power amplifier level, and several parts of electronic switch are formed jointly;

Prestage mainly is made up of a triode, and with the base stage of the triode input end as this unit, collector connects power supply, and emitter has connected the input end of interstage amplifier section;

Interstage amplifier section is made up of several not gates and relevant peripheral element:

With the input end of first not gate in the interstage amplifier section as input end at the corresponding levels, and connected the input end of second not gate with the output terminal of first not gate in this grade, be connected to the input end of last not gate of interstage amplifier section as method, last non-gate output terminal is the output terminal of interstage amplifier section, and the output terminal of each not gate and input end are connected with a resistance; The output terminal of this grade has connected the input end of power amplifier;

The power amplifier level is by two not gates and one or form:

With the connected input of second not gate in this level of the input of first not gate in the power amplifier level, the output of second not gate has connected or an input of door, and the input of first not gate connects the output of interstage amplifier section; Or the output of door is the output of power amplifier level;

In the power amplifier level or three inputs of door connected the output terminal of time control respectively, the output terminal of warning starting switch, shooting manually boots the output terminal of switch;

The output power amplifier level or door has connected three the tunnel, and the first via has connected the input of electronic switch, and the second the tunnel has connected the input of the rest-set flip-flop of band demonstration; Third Road has connected time controller control end;

The output of electronic switch has connected video camera recorder;

Sound system is by the pronunciation sheet, operational amplifier and peripheral element, and loudspeaker is formed jointly:

The positive terminal of operational amplifier is received in the output of pronunciation sheet, the end of oppisite phase ground connection of operational amplifier, the output of operational amplifier has connect two-way, one the tunnel has connected an end of audio frequency adjustment resistance, audio frequency is adjusted the resistance other end and is connected audio frequency adjustment electric capacity, and audio frequency is adjusted electric capacity other end ground connection, and another road has connected the positive pole of commissure electric capacity, commissure electric capacity negative pole extremely links to each other with one of loudspeaker, another utmost point ground connection of loudspeaker.

2. the shooting warning device that overcurrent protection arranged according to claim 1 is characterized in that: the signal lead-out mode that lockhole is covered sheet is, weld on the silver-plated weld tabs with an end of a lead, silver-plated weld tabs again with the rivet riveting on lockhole coverage sheet.

3. the shooting warning device that overcurrent protection is arranged according to claim 1 is characterized in that: the not gate employing integrated circuit 4069 before the case in the shooting record automatic control circuit.

4. according to claim 1 have the shooting of overcurrent protection to guard against device, and it is characterized in that: the operational amplifier in the sound system is integrated circuit LM386; Loudspeaker is the loudspeaker that power is 0.5W, and its internal resistance is 8 Ω.

5. according to claim 1 have the shooting of overcurrent protection to guard against device, and it is characterized in that: the feedback capacity in the timing feedback circuit is the electrodeless electric capacity that is in series with two electrochemical capacitor positive poles.

6. according to claim 1 have the shooting of overcurrent protection to guard against device, and it is characterized in that: the stabilivolt that input end overvoltage protection triggering branch road and output terminal overvoltage protection trigger in the branch road in the protection type stabilized voltage supply is to be in series by many diodes.

7. according to claim 1 have the shooting of overcurrent protection to guard against device, and it is characterized in that: commutation diode is the heavy-duty diode of usefulness in the two end protection type stabilized voltage supply.

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