CN203444592U - Dual-switch starting videoing guard door - Google Patents
Dual-switch starting videoing guard door Download PDFInfo
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- CN203444592U CN203444592U CN201320466981.XU CN201320466981U CN203444592U CN 203444592 U CN203444592 U CN 203444592U CN 201320466981 U CN201320466981 U CN 201320466981U CN 203444592 U CN203444592 U CN 203444592U
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Abstract
A dual-switch starting videoing guard door belongs to the door industry technical field, and comprises a lock hole protection sheet, a bridge control type videoing circuit, an alarm starting unit, and a power amplification effect unit; the dual-switch starting videoing guard door is a novel anti-theft product, and is formed by new measurements provided by the inventor and combined with existing accomplishment technology; the alarm starting unit is provided with a lock hole switch and a travel switch; the lock hole protection sheet covers the lock hole and the lock hole switch, so the lock hole is strictly protected; if someone tries to break the lock hole, the bridge control type videoing circuit will immediately start once a hand touches the lock hole protection sheet, and the power amplification effect unit is opened for videoing and stopping onsite; if not stopped, the alarm starting unit will immediately generate alarm starting signals either the lock hole protection sheet is loosened or displacement is generated between the door and a door frame, so the power amplification effect unit is opened for videoing and alarming onsite, thereby further improving the anti-theft product.
Description
Technical field
Belong to an industry technical field.
Background technology
Society is improving, science need to improve and innovate, the means of crime are also increasing, in the face of the upper panoramic crime means of society, anti-theft safety door also wants continuous innovative ability to adapt to the demand of family, has therefore occurred on the market the product much coordinating with anti-theft safety door, and video recording monitor is exactly one of wherein the most popular auxiliary products, video recording monitor can monitor the various people in this region and the thing of generation at any time, to understanding the thing occurring at that time, will play very important effect.
The writing function that video recording monitor produces is the due critical function of monitor, and just " return visit " just can not the front situation about occurring of understanding case afterwards there is no record.In important public place, be generally to adopt whole day inspecting and recording, if but adopt in such a way for family, may whole day be all substantially useless record, bothersome, take resource.To some non-public place ，Ru families, the generation that common product adopts event just start to produce shooting record, although such function is very important, but situation before cannot understanding case also becomes a kind of very large deficiency.Because having before concluding a case one is to perform in advance security measures after record, gaining the initiative property, generation event after even overcoming.The 2nd, have conclude a case before record, event is understood more comprehensively.So there is the front shooting of case writing function important in inhibiting.
Creative Science and Technology Co. Ltd needs the break-in of various technology, and antitheft series products performance need further promotes, and therefore also requires further study.
Summary of the invention
In order to promote the performance of anti-theft security door product, fundamental purpose of the present invention is to propose new measure, in conjunction with existing achievement technology, become a kind of novel antitheft series products, the unessential part of shooting record energy automatic fitration, when there is something special, the record of making a video recording in time, has further promoted the performance of anti-theft product.
The technical solution used in the present invention is:
1, two switch activated shooting guarding doors are by lockhole screening glass, and electric bridge control formula is shot with video-corder circuit, warning start unit, and power amplifier effect unit forms jointly.
Wherein: warning start unit consists of jointly lockhole switch and travel switch.
Lockhole switch is mounted in lockhole top, lockhole screening glass below, and lockhole screening glass is fixed on the button that door is oppressed lockhole switch after upper, and lockhole switch contact is drawn with wire, connects in power amplifier effect unit.
Travel switch is positioned on anti-theft safety door and doorframe junction, oppresses the button of travel switch after door and doorframe closure, and draw with wire travel switch contact, is connected in power amplifier effect unit.
Electric bridge control formula shoot with video-corder circuit by transformer unit, the preposition unit of bridge type, penetrate with isolated location, amplifying unit and jointly form.
With transformer unit, connected the preposition unit of bridge type, the preposition unit of bridge type has connected to be penetrated with isolated location, penetrates with isolated location and has connected amplifying unit, and amplifying unit has connected onsite alarming unit.
With the wires lockhole screening glass sheet metal of ining succession, the other end of this metal wire has connected the preposition unit of bridge type after having connected a commissure electric capacity.
The connection of transformer unit is; The positive pole that connects respectively two diodes with the secondary two ends of transformation, secondary central shaft heads ground connection, has connected two-way after the negative pole of two diodes links together, and the first via has connected working power, the second tunnel has connected the positive pole of an electric capacity, the minus earth of this electric capacity.
The preposition unit of bridge type, is comprised of 4 diodes and 4 electric capacity; With two diode D1 and D2, be composed in series a new branch road, with another two diode D3 and D4, be composed in series another new road, with the positive pole of these two new branch roads, be connected to, negative pole links together, become a kind of bridge rectifier circuit, wherein use the tie point in two diode D1 and D2 series arm, as the outside output terminal in the preposition unit of bridge type, with the tie point in another two diode D3 and D4 series arm, connect ground wire.
With electric capacity C1 and C2, one end connect the positive terminal of bridge rectifier circuit, the other end of capacitor C 1 has connected one end of primary, the other end of capacitor C 2 has connected the other end of primary; The one end that has connected again two capacitor C 3 and C4 in one end of the negative pole of bridge rectifier element, capacitor C 3 other ends have connected one end of primary, and the other end of capacitor C 4 has connected the other end of primary.
Penetrate with isolated location, a triode and a resistance, consist of, by the base stage of the triode in this grade, connected the output terminal of the preposition unit of bridge type, the collector of this pipe connects power supply, and emitter-base bandgap grading has been connected after a resistance as output terminal at the corresponding levels.
Amplifying unit, by first NPN triode and second PNP triode, jointly formed, with first transistor base, connect and penetrate the output terminal with isolated location, grounded emitter, collector has been connected and has been connected the base stage of second triode after a resistance, the emitter of second triode connects power supply, and collector is as output terminal at the corresponding levels; This output terminal is connected in power amplifier effect unit.
Power amplifier effect unit is comprised of video camera recorder and onsite alarming.
Video camera recorder is by the rest-set flip-flop with demonstration, time controller, and shooting manually boots switch and jointly forms.
Onsite alarming is with the output of voice sheet, to connect the base stage of prestage amplifying triode, the collector of this three utmost point connects two-way, one tunnel connects a collector resistance to live wire, the second tunnel is to have connected the base stage that is connected power tube after the parallel circuit of commissure resistance and commissure electric capacity, the collector series connection lotus root of power tube is closed after the part in parallel of resistance and coupling capacitor, has connected pronunciation device.
2,4 capacitance parameters that connect in the preposition unit of bridge type are consistent, and adopt withstand voltage high electric capacity; Or by consistent two capacitances in series of use of amount of capacity together, form a new electric capacity, as method forms 4 new equivalent capacitys altogether, replace respectively 4 Single Capacitances in the preposition unit of bridge-type.
3, between lockhole screening glass and anti-theft safety door, be to be screwed.
What 4, in onsite alarming, loudspeaker was selected is the loudspeaker of internal magnetization.
5, in onsite alarming, voice sheet is alert sound sheet.
For having a clear understanding of the meaning of the technical program, first will make the following instructions:
It one is that normal door is opened the door without mechanical key that inventor has been fruitful, but the mode of opening the door with electronics telecontrol engineering or phone.When normal door, be installed on the propulsion system in door, will promote lockset action, realization is opened the door.Meanwhile, still retained the form that mechanical key opens the door, its objective is and when automatic system goes wrong, can have a kind of opening the door to make up.This be if opened the door with mechanical key, and great majority are to want by joining the situation of mechanical key crime, are also the situations that needs telephone call.And a few cases is own oneself to want the situation of opening the door with mechanical key because electrical equipment goes wrong, but this situation is own clearly situation on the scene, produces alert sound oneself and does not also feel fearful and nervous.
For this reason, the existing meaning to each technical measures of the present invention, concrete condition is further explained as follows:
One, the present invention design is that a kind of band has levels and has the alarming device of several functions.
1. the first level is pre-warning: fundamental purpose is to prevent the heart that has crime, or firm crowd when bud.Function is to rigidly connect and touch above lockhole after cover plate at the hand when crime, sound system will send pre-warning, this warning is more neutral, as the sound can send " please noting ", or the language such as " please not staying at this " is prevented, by the benefit of gender neutral language, be to may criminal causing very large psychological pressure, but can not damage being not intended to person, to neighbours, more can not cause in terror, because causing consequence, pre-warning and crime also have very large gap, can produce so very large benefit, be to produce pressure very greatly at heart to criminal, the generation of pre-warning can make him know clearly, in room, early there is preparation, if continued, must there is " below " waiting for, by have thereby hint obliquely at later difficult, probably impel it to stop as early as possible, halt at this point, so played the initiatively effect of protection.
The protection of 2, the second levels is warning devices, is mainly the criminal for the pre-warning of not preventing; if think formal damage lock port lid; while entering house by cracking lockhole, will be subjected to displacement by the shift knob of lockhole cap lower compression, and send the signal of formal warning.
3. it is mainly double function, the one, and shooting record, the 2nd, onsite alarming.
Two. principle and effect that shooting record produces:
1, the bridge diagram no-output principle that shooting produces: when no touch signal, 07,08,09,10 in four capacitor C 1 in communication channel, C2, C3, C4(Fig. 1) forming, the preposition unit of bridge type, no-output.When having touch signal, the bridge diagram parameter generation great change that former four electric capacity form, there is alternating current output, passed through by diode D1, D2, D3, after the rectification circuit (11 in Fig. 1) that D4 forms, there is direct current output, through penetrating with isolated location, after amplifying unit amplifies, finally encouraged onsite alarming unit, thereby the various effects that various functional units produce have been produced, in Fig. 1 29 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 25) after, open electronic switch (in Fig. 1 26), then allow video camera work.
2, circuit is outstanding reliable: sensitive reliable.
(1), the preposition unit of bridge type, performance is good:
it is formercause is when no touch signal, in 4 capacitor C 1 of electric bridge, C2, C3, C4(Fig. 1 07,08,09,10) parameter is consistent, internal current balance, the output of bridge-type output terminal no signal, after hand contact chip, there is serious variation in the capacitance parameter that contains touch sheet end, so output terminal has signal output, bridge diagram and bridge rectifier circuit all belong to classical circuit in circuit, theoretical and test shows, this circuit has very high sensitivity, and circuit is very reliable and stable, for the present invention has established fine basis.
(2), isolated location played matching effect well between the preposition unit of bridge type and amplifier stage, further promoted the performance of measure of the present invention.This grade of the first has very high input impedance, played good buffer action in two-stage.It two is that output impedance is low, and the excitation of rear class is had to very strong surplus.
(3), amplifier stage has outstanding performance.In this grade of unit of the first, the door of triode T1 (12 in Fig. 1) input is very low, only has 0.7 volt.The 2nd, 16 in this grade of triode T3(Fig. 1) there is very strong amplifying power, because 16 14 in triode T2(Fig. 1) and in triode T3(Fig. 1) formed complementary relationship, the 3rd, 16 in triode T3(Fig. 1 of amplifier stage) there is very strong carrying load ability, formed the form of electronic switch.
(4) it is that operating voltage can have relatively wide scope that, in the present invention active all adopts the benefit of triodes, thereby can save mu balanced circuit in working power, and its benefit has two, the first, and circuit simplifies, more reliable.The secondth, if while adopting three end contain integrated regulator, when civil power changes when too high, fragile.
(5), when no touch signal, system power saving has also reduced having " electrical wear " of element, the reliability of having promoted circuit from another angle simultaneously.
3, produce the principle that overall process is recorded in shooting: although hand has left lockhole top cover plate after forcing open the door, but above lockhole and the alarm switch contact being pressed under cover plate is not oppressed by cover plate, variation has occurred, and lockhole switch (119 in Fig. 1) is closed, so opened video camera job record.
4, before generation case, after shooting record, there is displaying principle: in Fig. 1,28 is a kind of rest-set flip-flops with demonstration, thereby there is Memorability, when each or door has output to open electronic switch 26, the rest-set flip-flop that has memory is triggered in capital, after so once rest-set flip-flop is triggered, additional LED meeting luminescence display, so can automatically record the moment of generation.
Lockhole switch and the travel switch of three, in measure scheme one, pacifying, it is the key component that warning of the present invention starts, also be a bright spot of putting of the present invention, because after the existing achievement of this part and inventor cooperatively interacts, warning of the present invention has been accomplished more scientific, also be the place different from a lot of alarms, its reason is:
1, can generation not make us terrified wrong report, this is the most important.Its reason is, the door that owner is absent from the scene is within doors opened (with improper, opening), is all crime behaviors, and warning is now all very significant.
2, very reliable, because the opening the door at closing time of normal life, do not need artificial additional move, do not affect the normal habits and customs of people, thereby do not affect the normal operation of the each starting of security system.
3, two switches in warning starting unit are sensitive and reliable, can when crime behavior is not accomplished, just not report to the police, thereby loss is reduced to minimum.Because at lockhole cap switch contact on lockhole when loosening initiating signal of reporting to the police that will change, in like manner, when door and doorframe are subjected to displacement, travel switch contact does not suffer oppression, and can send warning initiating signal yet.
Four, onsite alarming is comprised of separation member, but it is few that the advantage of circuit is circuit component, there is larger gain, also very convenient in being arranged on carry-on box, this circuit pronunciation part is applicable to loudspeaker, is also suitable for alert sound sheet, test shows, by the former advantage, be sound greatly, but the latter's advantage is more power saving, sound also can meet the requirements simultaneously.
After the invention process, anti-theft security goalkeeper presents a kind of brand-new looks, has following outstanding advantage:
1, after the invention process; anti-theft safety door and alarm have been realized the combination of science; the advantage that has possessed two kinds of protectors; usually both people can be kept outside the door; when running into other people and committing a crime; can send two kinds of warnings; to increasing " the initiatively protectiveness " of anti-theft safety door; (its implication is; function of the present invention will suppress crime behavior generation; and whether waiting for passively that it destroys) and be all very significant, the situation of the passive defence of anti-theft safety door so this product is through with completely, has promoted security personnel's performance of anti-theft safety door all sidedly.
2, shooting record performance is excellent.The one, before case, record is given prominence to the key points.The 2nd, after having record, can automatically show the owner of announcement, can " not leak visit ".The 3rd, there is to do cases and can record overall process.The 4th, shooting records various ways.The 5th, when recording, there is time of generation.These 5 meanings have return visit and save time, economize energy, save device resource etc. serial advantage, have really realized workable feature and have been.(in the situation of work strain, family can not impunity carry out " returns visit " to shooting, more impossible in return visit, watch a lot of useless impunities general to record).Thereby for understanding family public security present situation, there is very important positive role.
3, Forewarning Measures performance is outstanding reliable, can guarantee this functional effect.Reason one is highly sensitive, can guarantee that early warning system will be started immediately when having people to want to destroy lockhole.The 2nd, load capacity is strong, thereby various effect can fully demonstrate, and the 3rd, circuit is reliable, not fragile.
4, warning system partial properties is very excellent, for alarm, is most valuable, embodies in the following areas:
The one, warning system can not reported by mistake completely.Because after coordinating with existing achievement, there is automatic recognition property.The warning producing when owner is absent from the scene may be only crime behavior.Otherwise the behavior of not committing a crime, switch can not send signal, at this moment because the structures shape of switch is installed.Due to the intrinsic property of switch, when being subject to compressing and not suffering oppression, shift knob there is to occur the variation of contact.
The 2nd, reliable, its reason one is, user is closing the door when opening without any need for other additional move, thereby warning system is at any time all in a kind of " highly waiting " state, do not need any preliminary work, the 2nd, the malfunctioning chance of mechanical switch is far superior to electronic component.
The 3rd, easy to use.After installation, do not affect normal habits and customs completely.If increased trouble with former life, the shortcoming of obviously bringing to people is or is to use inconvenience, or forgotten necessary operation and bring the malfunction of warning or malfunctioning.
The 4th, protection is tight, has laid special stress on protecting the practice that cracks lockhole.
Accompanying drawing explanation
Fig. 1 is that the electric bridge control formula in the present invention is shot with video-corder circuit and power amplifier effect unit basic diagram.
In figure: 01, the primary side of transformer; 02, the out secondary of transformer; 03, full-wave rectification diode; 04, rectifying and wave-filtering electric capacity; 05, lockhole screening glass; 06, commissure electric capacity; 07, one of electric capacity in electric bridge; 08, two of the electric capacity in electric bridge; 09, three of the electric capacity in electric bridge; 10, four of the electric capacity in electric bridge; 11, the rectifier cell in electric bridge; 12, penetrate with isolated location; 13, protective resistance; 14, first triode in amplifying unit; 15, the commissure resistance of two triodes in amplifier stage; 16, second triode in amplifying unit; 17, electric bridge control formula is amplified output; 19, the electric capacity that one of electric capacity in electric bridge newly adds; 20, two of the electric capacity in the electric bridge electric capacity that newly add; 21, three of the electric capacity in the electric bridge electric capacity that newly add; 22, four of the electric capacity in the electric bridge electric capacity that newly add; 25, shoot with video-corder and start or door; 26, electronic switch; 27, video camera recorder; 28,, there is the rest-set flip-flop of demonstration in generation; 29, time controller; 30, lockhole switch; 31, manual control switch.
Fig. 2 is the scheme of installation of lockhole screening glass and lockhole switch.
In figure: 382, travel switch; 383, the box of travel switch is installed; 385, travel switch extension line; 05, lockhole screening glass; 390, lockhole; 391, the printed panel of welding lockhole switch; 30, lockhole switch; 395, lockhole switch extension line; 397, anti-theft safety door.
Fig. 3 is the onsite alarming circuit diagram in power amplifier effect unit.
In figure: 13, shoot with video-corder and control amplification output; 395, lockhole switch extension line; 201, pronunciation sheet; 202, enlargement factor adjusting resistance; 203, operational amplifier; 206, audio frequency adjusting resistance; 207 commissure electric capacity; 205, loudspeaker.
Fig. 4 is that each several part is related to block diagram.
In figure: 05, lockhole screening glass; 38, electric bridge control formula is shot with video-corder control circuit; 30, lockhole switch; 31, manual control switch; 382, travel switch; 25, shoot with video-corder and start or door; 26, electronic switch; 27, video camera recorder; 39 onsite alarmings.
Embodiment
Fig. 1 to 4 has described specific embodiment of the invention example.
One, by Fig. 2, implement the start unit of reporting to the police.
1, with a hard material, be processed into strike out than the large four directions of lockhole lid and become lockhole screening glass of the present invention, lockhole screening glass is also the cover plate of covering lockhole.
2, at the periphery of lockhole screening glass (cover plate), make a call to four apertures, the place punching that cover plate is installed at shop front lockhole is corresponding with it, the mounting hole tapping of the shop front.
4, between lockhole screening glass and door, add hollow cushion ring, allow hollow place expose lockhole.
5, lockhole screening glass is fixed in the shop front.Fixedly time, should notice between lockhole screening glass and door fixedly time that pad last layer insulant is as plastic washer.
6, with one end of a wire, connect lockhole screening glass, the other end has connected the electric bridge being positioned in door and has warned in electronic circuit in advance.
7, lockhole switch is welded on a bar printing plate, the printed panel that has welded switch is fixed on door lock hole.
8, lockhole switch contact is drawn and is connected in power amplifier effect unit with wire.
9, lockhole screening glass is oppressed lockhole shift knob after fixing.
10, travel switch is arranged in a box, then box is fixed in door, after anti-theft safety door and doorframe closure, doorframe is oppressed the button of travel switch.
11, the contact of travel switch is drawn and is connected in power amplifier effect unit with wire.
Two, installation and debugging electronic circuit;
1, selectors; The preposition unit of bridge type electric capacity used adopts withstand voltage high electric capacity kind, or the form of employing measure 2, by higher capacitance, is together in series, and becomes a new electric capacity.But it should be noted, no matter 4 electric capacity in electric bridge adopt one or two series connection form, and it is basically identical all should selecting its capacity parameter.Bridge diode in electric bridge also should select the kind that back-pressure grade is high.Onsite alarming unit can be selected one, or two, or a plurality of etc., can be selected by the requirement of oneself, as onsite alarming, telephone call, automatic camera etc. function.
2, welding: the mode according to Fig. 1 is welded.
3, debugging:
(1), test and the adjustment preposition unit of bridge type: with the voltage gear of multimeter, survey and penetrate penetrating with output with triode in isolated location; when hand contacts coverage sheet on lockhole and is lockhole screening glass, emitter follower is not output as low level; below 0.5 volt; and integrated circuit the 2nd pin should be exported a high position when hand contacts the coverage sheet on lockhole; whether equally the nonconforming emphasis of answering changes four capacitance values of electric bridge; if desired; the capacity inspection of available electric bridge to four electric capacity, whether the same referring to seeing number.
Test and adjustment amplifier stage unit: with the voltage between PNP transistor emitter in this grade of voltage detecting of multimeter and collector, when prestage integrated circuit no-output, voltage should be supply voltage substantially, and while having touch signal, voltage should be less than 0.5 volt nonconformingly should adjust the commissure resistance between two triodes in this grade.
Four, Detection and adjustment onsite alarming unit effect:
Fig. 3 welding is pressed in onsite alarming unit.
1, when hand contact touch sheet, each onsite alarming unit should produce corresponding functional effect, first onsite alarming unit is onsite alarming, should send early warning sound, second unit is automatically to open camera function, and video camera should start, when hand leaves touch sheet, corresponding function should stop, otherwise should adjust the adjustment part in corresponding unit.
2, adjust the time control section of time-controlling apparatus, the time period that simulation is adjusted, video camera recorder should be worked.Otherwise should check and start or door.
3, manually opened switch 120, video camera recorder should be worked.
4, after video camera recorder work, in the rest-set flip-flop that band shows, pilot lamp is bright, and time controller has the corresponding time, otherwise should check relevant part.
Claims (5)
1. liang switch activated shooting guarding door, is characterized in that: by lockhole screening glass, electric bridge control formula is shot with video-corder circuit, warning start unit, and power amplifier effect unit forms jointly;
Wherein: warning start unit consists of jointly lockhole switch and travel switch:
Lockhole switch is mounted in lockhole top, lockhole screening glass below, and lockhole screening glass is fixed on the button that door is oppressed lockhole switch after upper, and lockhole switch contact is drawn with wire, connects in power amplifier effect unit;
Travel switch is positioned on anti-theft safety door and doorframe junction, oppresses the button of travel switch after door and doorframe closure, and draw with wire travel switch contact, is connected in power amplifier effect unit;
Electric bridge control formula shoot with video-corder circuit by transformer unit, the preposition unit of bridge type, penetrate with isolated location, amplifying unit and jointly form:
With transformer unit, connected the preposition unit of bridge type, the preposition unit of bridge type has connected to be penetrated with isolated location, penetrates with isolated location and has connected amplifying unit, and amplifying unit has connected onsite alarming unit;
With the wires lockhole screening glass sheet metal of ining succession, the other end of this metal wire has connected the preposition unit of bridge type after having connected a commissure electric capacity;
The connection of transformer unit is; The positive pole that connects respectively two diodes with the secondary two ends of transformation, secondary central shaft heads ground connection, has connected two-way after the negative pole of two diodes links together, and the first via has connected working power, the second tunnel has connected the positive pole of an electric capacity, the minus earth of this electric capacity;
The preposition unit of bridge type, is comprised of 4 diodes and 4 electric capacity; With two diode D1 and D2, be composed in series a new branch road, with another two diode D3 and D4, be composed in series another new road, with the positive pole of these two new branch roads, be connected to, negative pole links together, become a kind of bridge rectifier circuit, wherein use the tie point in two diode D1 and D2 series arm, as the outside output terminal in the preposition unit of bridge type, with the tie point in another two diode D3 and D4 series arm, connect ground wire;
With electric capacity C1 and C2, one end connect the positive terminal of bridge rectifier circuit, the other end of capacitor C 1 has connected one end of primary, the other end of capacitor C 2 has connected the other end of primary; The one end that has connected again two capacitor C 3 and C4 in one end of the negative pole of bridge rectifier element, capacitor C 3 other ends have connected one end of primary, and the other end of capacitor C 4 has connected the other end of primary;
Penetrate with isolated location, a triode and a resistance, consist of, by the base stage of the triode in this grade, connected the output terminal of the preposition unit of bridge type, the collector of this pipe connects power supply, and emitter-base bandgap grading has been connected after a resistance as output terminal at the corresponding levels;
Amplifying unit, by first NPN triode and second PNP triode, jointly formed, with first transistor base, connect and penetrate the output terminal with isolated location, grounded emitter, collector has been connected and has been connected the base stage of second triode after a resistance, the emitter of second triode connects power supply, and collector is as output terminal at the corresponding levels; This output terminal is connected in power amplifier effect unit;
Power amplifier effect unit is comprised of video camera recorder and onsite alarming:
Video camera recorder is by the rest-set flip-flop with demonstration, time controller, and shooting manually boots switch and jointly forms;
Onsite alarming is with the output of voice sheet, to connect the base stage of prestage amplifying triode, the collector of this three utmost point connects two-way, one tunnel connects a collector resistance to live wire, the second tunnel is to have connected the base stage that is connected power tube after the parallel circuit of commissure resistance and commissure electric capacity, the collector series connection lotus root of power tube is closed after the part in parallel of resistance and coupling capacitor, has connected pronunciation device.
2. two switch activated shooting guarding doors according to claim 1, is characterized in that: 4 capacitance parameters that connect in the preposition unit of bridge type are consistent, and adopt withstand voltage high electric capacity; Or by consistent two capacitances in series of use of amount of capacity together, form a new electric capacity, as method forms 4 new equivalent capacitys altogether, replace respectively 4 Single Capacitances in the preposition unit of bridge-type.
3. two switch activated shooting guarding doors according to claim 1, is characterized in that: between lockhole screening glass and anti-theft safety door, be to be screwed.
4. two switch activated shooting guarding doors according to claim 1, is characterized in that: what in onsite alarming, loudspeaker was selected is the loudspeaker of internal magnetization.
5. two switch activated shooting guarding doors according to claim 1, is characterized in that: in onsite alarming, voice sheet is alert sound sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320466981.XU CN203444592U (en) | 2013-08-01 | 2013-08-01 | Dual-switch starting videoing guard door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320466981.XU CN203444592U (en) | 2013-08-01 | 2013-08-01 | Dual-switch starting videoing guard door |
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| Publication Number | Publication Date |
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| CN203444592U true CN203444592U (en) | 2014-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320466981.XU Expired - Fee Related CN203444592U (en) | 2013-08-01 | 2013-08-01 | Dual-switch starting videoing guard door |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107958563A (en) * | 2017-11-13 | 2018-04-24 | 常州杰轩纺织科技有限公司 | A kind of Household antitheft warning device |
-
2013
- 2013-08-01 CN CN201320466981.XU patent/CN203444592U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107958563A (en) * | 2017-11-13 | 2018-04-24 | 常州杰轩纺织科技有限公司 | A kind of Household antitheft warning device |
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