CN203308215U - Amplifying early-warning device capable of giving alarm in advance - Google Patents
Amplifying early-warning device capable of giving alarm in advance Download PDFInfo
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- CN203308215U CN203308215U CN2013202275194U CN201320227519U CN203308215U CN 203308215 U CN203308215 U CN 203308215U CN 2013202275194 U CN2013202275194 U CN 2013202275194U CN 201320227519 U CN201320227519 U CN 201320227519U CN 203308215 U CN203308215 U CN 203308215U
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Abstract
The utility model discloses an amplifying early-warning device capable of giving an alarm in advance and belongs to the technical field of prevention of burglary. The amplifying early-warning device is composed of a double-end protective power source, an early-warning signal taking-out piece, an early-warning electronic circuit, a sound system and an alarm switch. The early-warning signal taking-out piece is arranged on a keyhole of a door lock to cover the alarm switch and a keyhole switch. When a person attempts to decode the keyhole, as soon as the person touches the early-warning signal taking-out piece, a touch signal can be generated to start the high-sensitivity and high-reliability early-warning electronic circuit to push the high-power sound system; when the early-warning signal taking-out piece becomes loose before prohibition, alarm switch contacts can change to generate an alarm starting signal, and then the sound system can be started to give an alarm sound. The matched double-end protective power source has good thunder resistance and over-voltage protection effects and good voltage stabilization performance, therefore, performance of the amplifying early-warning device is further guaranteed, the alarm can be given in advance, and performance of products like burglary-resistant safety doors is improved.
Description
Technical field
Belong to technical field of burglary prevention.
Background technology
Anti-theft safety door is the protector of each family's indispensability; but anti-theft safety door can only be the protection of passive type; do not possess the performance that the people is kept outside of the door; so it is far from being enough only having the passivity protection of door; alarm has just become the commonly used antitheft equipment coordinated with door; can make up the some shortcomings of anti-theft safety door, but want to become outstanding antitheft series products, it is inadequate that alarm is only arranged.
The kind of alarm is a lot of at present, but most products all exists following deficiency:
1, supporting electric power output voltage is not very high, and overvoltage capabilities is poor.From some technical data, the method that a lot of designers 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 to 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, it is very necessary so wish, stopping each dead angle that may exist.
2, only have in flagrant delict and just producing onsite alarming, and can not likely the crime just start just give a warning, so just produced the shortcoming of two aspects, the one, easily produce consequence, as door, made a mess of etc., and, after door is pried open, be namely responding sound to occur also likely produce and continue stolen result, the 2nd, the onsite alarming at this moment produced also can cause surrounding not peaceful terrified.If imagination just starts crime; just sound a warning; can not only overcome above-mentioned 2 deficiencies; and can also to produce a very large benefit be because very large lead arranged; the criminal is understood preparation is early arranged within doors; thereby can receive as early as possible hand, thereby become a kind of " protection initiatively ", this protection.
And become such " initiatively protection ", two hang-ups are arranged, the one, how to reach reports to the police has lead, and the 2nd, except lead is arranged, also need to have any method to improve the dynamics of reporting to the police.
Due to above-described difficult point, so present antitheft series products is also not very outstanding, solve the above problems, also require further study.
Summary of the invention
Main purpose of the present invention is the weakness existed for making up alarm, main task of the present invention and purpose are to take full advantage of the existing patent of inventor and technological achievement, a kind of new technical measures are proposed again, the characteristics of this measure are that the beginning of crime has been arranged just, or the preparatory stage, can send immediately a kind of pre-caution, prevent, better prevention effect is arranged like this, thereby enrich the new protector kind of outstanding warning performance.
The technical solution used in the present invention is:
1, allow and report to the police amplification precaution device in advance by two end protection type power supply, early warning signal takes out sheet, the early warning electronic circuit, and sound system, alarm switch, several parts form jointly.
Wherein: two end protection type source of stable pressure is the voltage-limiting protection unit, overvoltage fast tripping protection unit, and the input overvoltage protection triggers branch road, and the output 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 a road 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 stage of voltage-limiting protection triode is the output of this unit, with the positive pole of a voltage-stabiliser tube, has been connected on the base stage of voltage-limiting protection triode, the minus earth of this voltage-stabiliser tube.
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 colelctor electrode 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 of input overvoltage protection triggering branch road and output overvoltage protection triggering branch road.
It is by a voltage-stabiliser tube and the branch road that diode is in series that the input overvoltage protection triggers branch road; the positive terminal of this branch road voltage-stabiliser tube has been connected to the emitter stage of voltage-limiting protection triode; the other end is namely the output of this branch road, has connected the base resistance of overvoltage fast tripping protection triode.
It is by a voltage-stabiliser tube and the branch road that diode is in series that the output overvoltage protection triggers branch road; the positive terminal of this branch road voltage-stabiliser tube has been connected to the output of voltage regulation unit; the other end is namely the output 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 circuits and peripheral element: the emitter-base bandgap grading that has connected the voltage-limiting protection triode with the input of 78 serial integrated circuits; the 78 serial integrated circuit earth terminals ground connection after a resistance of having contacted; output 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 of 78 serial integrated circuits is last outputs, and the power supply input of each circuit part all is connected on herein.
Early warning signal takes out sheet, consists of a sheet metal, is mounted in the lockhole top, connects early warning signal taking-up sheet with an end of wire, and the wire other end connects the early warning electronic circuit.
The early warning electronic circuit is the normal phase input end that early warning signal is incorporated into first order operational amplifier, the negative phase end of first order operational amplifier is connected a gain adjusting resistance with the output of first order amplifier, the output of first order amplifier is connected to the normal phase input end of second level amplifier, comparison bleeder circuit by two resistance series connection, two resistance series connection points connect the negative phase end of second level amplifier, bleeder circuit one termination live wire, other end grounding wire, the output of second level amplifier is namely the output of early warning electronic circuit, is connected on sound system.
The position that alarm switch is installed is on the lockhole of the shop front, and early warning signal takes out under sheet, with screw, early warning signal is taken out to sheet and is fixed on door above, and take out with early warning signal the button that this switch is lived in the sheet compressing; With the contact of switch, connected sound system.
Sound system is the base stage that the output of voice sheet has connected preposition amplifier tube, the grounded emitter of preposition amplifier tube, colelctor electrode is connected on the base stage of the PNP pipe that forms power amplifier, the base stage that forms the PNP pipe of power amplifier has also connect an end of power amplifier level load resistance, the load resistance other end connects to form the base stage of the NPN pipe of power amplifier, the PNP pipe that forms power amplifier manages with NPN commissure electric capacity of central point series winding that emitter stage is connected, one end of another termination loudspeaker of commissure electric capacity, the other end grounding wire of loudspeaker, the NPN pipe Integrated electrode that forms power amplifier is received on the electronic switch of early warning electronic circuit.
2, in the early warning electronic circuit, resistance used is ten sixths watt.
3, the voltage-stabiliser tube that in two end protection type power supply, the input overvoltage protection triggers in branch road and output overvoltage protection triggering branch road is to be in series by many diodes.
Now to the meaning of each technical measures of the present invention, concrete condition further is explained as follows:
One,For the clear meaning of understanding the technical program, at first will make the following instructions: the existing achievement in research of the present invention is, to opening the door of security door, without mechanical key, but adopt the wireless remotecontrol method to open the door, and be only a kind of backup with the lockhole that mechanical key opens the door, when breaking down, just enable, so lockhole can seal.
Two,Effect of the present invention is that a kind of band has levels and the alarming device of several functions is arranged.Be that the different triggering starting device of two covers is arranged, two kinds of different cautions, thereby produce two kinds of different effects.
The first level is pre-caution: main purpose is to prevent the heart that crime is arranged, or firm crowd when bud.Function is to rigidly connect and touch above lockhole after early warning signal takes out sheet at the hand when crime, sound system will send pre-caution, this caution is more neutral, as the sound, can send " please noting ", or language such as " please not staying at this " is prevented, by the benefit one of gender neutral language, be will cause very large psychological pressure to the criminal, the 2nd, to being not intended to the person, can not damage, the 3rd, to the neighbours, more can not cause in terror.
The second level protection is to report to the police.Mainly for not preventing the criminal of the pre-caution of living, now, if think formal damage lock port lid, while by cracking lockhole, entering house, to send out and displacement by the shift knob of lockhole cap lower compression, thereby the starting warning system will be sent chimes of doom severe and deterrent that give great volume.
Three, the principle of pre-caution generation is: after criminal's hand touches the signal leading sheet of lockhole top, just be imported in the in-phase end of operational amplifier of the first order and amplify, 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.
Four, the sound equipment principle is: be comprised of a triode prestage that sound equipment amplifies, by a PNP and NPN triode, formed complementary circuit audio frequency has been carried out to 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 efficiency.
Five, two end protection type power supply has great importance in the present invention, and the spy does through lower explanation its circuit:
When 1, thunderbolt being arranged, be usually 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, as resolute power down source, will become security personnel 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 and output overvoltage protection and jointly formed " overvoltage fast tripping protection function ", and excellent performance, have very strong lightning protection overvoltage capabilities.
(1), form the principle of voltage regulation unit input overvoltage protection:
If thunderbolt and while 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 (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 overvoltage protection: press output if output has to gush; and surpassed after the voltage-stabiliser tube door that the output 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 saturation state 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, damage, all be in a kind of guard mode constantly.
Its reason is power output end while 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 has improved the protection to voltage regulation unit.
Its reason is, the base stage of voltage-limiting protection triode (in Fig. 4 906) has Zener 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, main cause one is that thunderbolt is the energy that a kind of destructiveness is very strong, particularly occurs in the place close to very from equipment.Design must leave sufficient surplus.The 2nd, protection of different nature is protected from different key points, can form complementary and strengthening, thereby can largely avoid the accident existed, 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 in measure, having increased peripheral element adjustable resistance (in Fig. 4 910 meanwhile 911), thereby can be on reference voltage, realize that again output voltage adjusts flexibly, to realize the normal voltage required to the battery floating charge, as 6.6 volts, 12.8 volts etc.
After the invention process, following outstanding advantage is arranged:
1, improve the defence rank, more focused on the idea of putting prevention first.Can prevent the symptom of a trend that much may occur in advance.The reason one that why can reach this purpose is, hand rigidly connects while touching locking closure, and (it is reported, be the main channel of committing a crime at present by cracking the lockhole crime) may be only the beginning that the heart of crime has just been arranged, if stopped immediately crime, can not produce such or such consequence.The 2nd, this caution will produce very large pressure at heart to the criminal's, because the criminal knows very well, this distance from " succeeding " is also far, very large if crime continues sure " risk ".
2, single for alarm, retained all advantages of existing warning product.
3, 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 can keep the people outside the door; when running into other people and committing a crime; can send two kinds of cautions; to increasing " the initiatively protectiveness " of anti-theft safety door; (its implication is; function of the present invention will suppress the crime behavior generation; and whether waiting for passively its destruction) be all very significant, the situation of the passive defence of anti-theft safety door so this product is through with fully, promoted security personnel's performance of anti-theft safety door all sidedly.
The switch of 4, pacifying in measure scheme one, be the key component that warning of the present invention starts, and is also 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 having been accomplished more scientific, is also the place different from a lot of alarms, and its reason is:
The one, can generation not make us terrified wrong report, this is the most important.Its reason is, the door that is absent from the scene of owner is opened (opening with improper) within doors, or opens the door by lockhole with ' key ', is all crime behaviors, and warning now is all very significant.
The 2nd, 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.
5, warning in advance circuit has very high sensitivity and reliability, after debugging, all is applicable to all-environment needs, and circuit is simple, and debugging is convenient.
6, the line power of sound equipment caution system is large, simple, and debugging is convenient, power saving.
7, the two end protection type power supply of institute's adapted has following advantage: (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 of voltage regulation unit has been realized to protection, and the second key point is that the output of voltage regulation unit has been realized to 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 three traditional end integrated circuits and combining of 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 (106 and 113 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 voltage-stabilized power supply, wider adaptive capacity is arranged, high at the voltage that meets accident, can not damage.And also can work in the lower place of voltage and period.
(4), there is the voltage stabilizing value of decimal in available adjustment output generation, be convenient to the floating charge of battery science.Has simultaneously overcurrent protection.Be fruitful or other electronic products have excellent performance after supporting.
(5), the voltage regulation performance excellence because it has all advantages of three end integrated regulated power supplies.
(6), easily produce.Reason one is in circuit, to have adopted complex function, thereby the simple in circuits compactness; The 2nd, because the debug point in circuit is few.The 3rd,, debug point very easily quantizes, and the debugging scope is loose.
The accompanying drawing explanation
Fig. 1 is that the present invention warns circuit diagram in advance.
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; 120, warn in advance output line; 28, two end protection type power supply.
Fig. 2 is that early warning signal takes out sheet and alarm switch is contained in lockhole top schematic diagram.
In figure: 1, the antitheft shop front; 2, early warning signal takes out sheet; 3, early warning signal takes out the sheet lead-in wire; 5, lockhole; 6, welding is reported to the police and is opened printed panel also; 7, alarm switch; 8, alarm switch lead-out wire; 9, alarm switch button; 28, two end protection type power supply.
Fig. 3 is sound system circuit figure.
In figure: 8, alarm switch lead-out wire; 120, warn in advance output 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); 308, loudspeaker.
Fig. 4 is two end protection type 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 Zener diode; 906, voltage-limiting protection triode; 908, input 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, voltage-stabilized power supply output: 914, the voltage regulation unit output trigger in branch road or gate diode; 916, output triggers in branch road and replaces a plurality of diodes in voltage-stabiliser tube; 918, input triggers in branch road and replaces a plurality of diodes in voltage-stabiliser tube.
The specific embodiment
Fig. 1, Fig. 2, Fig. 3, Fig. 4 have described the specific embodiment of the present invention jointly.
One, by Fig. 2, early warning signal is installed and is taken out sheet and alarm switch.
1, by a sheet metal punch process, become than lockhole Da De garden lid to become early warning signal taking-up sheet of the present invention.
2, by switch, preferably press button is welded on a bar printing plate and allows switch and printed panel become one, and draws the switch contact lead-in wire from printed panel.
3, at early warning signal, taking out sheet, to be positioned on the lockhole installation place punching of the shop front corresponding with it, and status requirement is after early warning signal taking-up sheet is fixed on the shop front, can cover lockhole.The installing hole tapping of the shop front.
4, at early warning signal, take out between film gate and add hollow cushion ring, allow hollow place expose lockhole.
5, early warning signal being taken out to sheet is fixed on the shop front.With screw, early warning signal is taken out to sheet and be fixed on door above, fixedly the time, early warning signal takes out the button that sheet should tightly be pushed down switch.
6, connecting sound equipment system of alarm switch lead-out wire, another root are connected in the output of two end protection type power supply.
Two, implement pre-caution part.
1, according to Fig. 1, weld pre-caution amplifier section.
2, the early warning signal of lockhole is taken out to sheet and connect lead-in wire, the other end of this lead-in wire is connected on the base stage of early warning amplifying circuit emitter follower.
3, will warn in advance output is connected on sound system.
Three, implement the warning part.
The lead-in wire of alarm switch is connected in sound system.
Sound system is by welding shown in Figure 3.
Four, two end protection type power supply is implemented as shown in Figure 4.
1, selected triode: this pipe is high inverse-voltage tube.Three end integrated stable voltage circuits; Triggering branch road 907 Zener diodes and pressure limiting voltage-stabiliser tube 905 all should be higher than the voltage regulation unit input value, but too high.Voltage-stabiliser tube 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 circuits resistance and lower inclined to one side resistance partially, make it the accurate requirement of voltage conforms battery 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 overvoltage fast tripping protection parameter.
The transformer primary side that breaks, the voltage regulation unit output that breaks triggers branch road, and voltage regulation unit input pressure limiting voltage-stabiliser tube breaks; 913; With the oscillographic source of stable pressure input that is connected on, with the DC voltages of 100 volts, click rectifier terminal, 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 input and trigger the voltage-stabiliser tube parameter in branch road.
(2), detect and debug voltage regulation unit input compression limiter and press parameter.
The transformer primary side that breaks, the output that breaks triggers branch road 913; With voltmeter, be connected on the source of stable pressure input, click rectifier terminal with the DC voltages of 100 volts, index shown in voltmeter is certain value.Otherwise should adjust the voltage-stabiliser tube 905 in the voltage-limiting protection unit.
(3), detect and debug voltage regulation unit output overvoltage fast tripping protection parameter.
The transformer primary side that breaks, the input that breaks triggers branch road voltage-stabiliser tube 907; Voltage-stabiliser tube 905 in compression limiter breaks; Output and the output of short circuit three end integrated circuits, be connected on the source of stable pressure input with voltmeter, clicks the voltage regulation unit input with the DC voltage of certain voltage, and now voltage shown in voltmeter will reduce rapidly.Otherwise should adjust output to trigger voltage-stabiliser tube value in branch road.
Claims (3)
1. the amplification precaution device that allows warning shift to an earlier date is characterized in that: by two end protection type power supply, early warning signal takes out sheet, the early warning electronic circuit, and sound system, alarm switch, several parts form jointly;
Wherein: two end protection type source of stable pressure is the voltage-limiting protection unit, overvoltage fast tripping protection unit, and the input overvoltage protection triggers branch road, and the output 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 a road 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 stage of voltage-limiting protection triode is the output of this unit, with the positive pole of a voltage-stabiliser tube, has been connected on the base stage of voltage-limiting protection triode, the minus earth of this voltage-stabiliser tube;
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 colelctor electrode 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 of input overvoltage protection triggering branch road and output overvoltage protection triggering branch road;
It is by a voltage-stabiliser tube and the branch road that diode is in series that the input overvoltage protection triggers branch road, the positive terminal of this branch road voltage-stabiliser tube has been connected to the emitter stage of voltage-limiting protection triode, the other end is namely the output of this branch road, has connected the base resistance of overvoltage fast tripping protection triode;
It is by a voltage-stabiliser tube and the branch road that diode is in series that the output overvoltage protection triggers branch road, the positive terminal of this branch road voltage-stabiliser tube has been connected to the output of voltage regulation unit, the other end is namely the output 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 circuits and peripheral element: the emitter-base bandgap grading that has connected the voltage-limiting protection triode with the input of 78 serial integrated circuits, the 78 serial integrated circuit earth terminals ground connection after a resistance of having contacted, output 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 of 78 serial integrated circuits is last outputs, and the power supply input of each circuit part all is connected on herein;
Early warning signal takes out sheet, consists of a sheet metal, is mounted in the lockhole top, connects early warning signal taking-up sheet with an end of wire, and the wire other end connects the early warning electronic circuit;
The early warning electronic circuit is the normal phase input end that early warning signal is incorporated into first order operational amplifier, the negative phase end of first order operational amplifier is connected a gain adjusting resistance with the output of first order amplifier, the output of first order amplifier is connected to the normal phase input end of second level amplifier, comparison bleeder circuit by two resistance series connection, two resistance series connection points connect the negative phase end of second level amplifier, bleeder circuit one termination live wire, other end grounding wire, the output of second level amplifier is namely the output of early warning electronic circuit, is connected on sound system;
The position that alarm switch is installed is on the lockhole of the shop front, and early warning signal takes out under sheet, with screw, early warning signal is taken out to sheet and is fixed on door above, and take out with early warning signal the button that this switch is lived in the sheet compressing; With the contact of switch, connected sound system;
Sound system is the base stage that the output of voice sheet has connected preposition amplifier tube, the grounded emitter of preposition amplifier tube, colelctor electrode is connected on the base stage of the PNP pipe that forms power amplifier, the base stage that forms the PNP pipe of power amplifier has also connect an end of power amplifier level load resistance, the load resistance other end connects to form the base stage of the NPN pipe of power amplifier, the PNP pipe that forms power amplifier manages with NPN commissure electric capacity of central point series winding that emitter stage is connected, one end of another termination loudspeaker of commissure electric capacity, the other end grounding wire of loudspeaker, the NPN pipe Integrated electrode that forms power amplifier is received on the electronic switch of early warning electronic circuit.
2. the amplification precaution device in advance of reporting to the police that allows according to claim 1, it is characterized in that: in the early warning electronic circuit, resistance used is ten sixths watt.
3. the amplification precaution device in advance of reporting to the police that allows according to claim 1 is characterized in that: in two end protection type power supply, to trigger branch road be to be in series by many diodes with the voltage-stabiliser tube in output overvoltage protection triggering branch road to the input overvoltage protection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202275194U CN203308215U (en) | 2013-04-30 | 2013-04-30 | Amplifying early-warning device capable of giving alarm in advance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202275194U CN203308215U (en) | 2013-04-30 | 2013-04-30 | Amplifying early-warning device capable of giving alarm in advance |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131127 Termination date: 20140430 |