CN203689648U - Visual intercom indoor terminal - Google Patents
Visual intercom indoor terminal Download PDFInfo
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- CN203689648U CN203689648U CN201420050277.0U CN201420050277U CN203689648U CN 203689648 U CN203689648 U CN 203689648U CN 201420050277 U CN201420050277 U CN 201420050277U CN 203689648 U CN203689648 U CN 203689648U
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Abstract
The utility model discloses a visual intercom indoor terminal, which comprises a microprocessor, a visual intercom module, a safety monitoring module, an emergency power supply automatic switching module, an emergency evacuation module and a communication interface, wherein the visual intercom module, the safety monitoring module, the emergency power supply automatic switching module, the emergency evacuation module and the communication interface are connected with the microprocessor; and the safety monitoring module comprises a smoke detection circuit, a temperature detection circuit and a gas leak detection circuit. The smoke detection circuit comprises that a detection channel circuit and a reference channel circuit are connected to two input ends of a differential amplification circuit I respectively, and the output end of the differential amplification circuit I is connected to a threshold value comparison circuit in series. The visual intercom indoor terminal has the beneficial effects that dangerous circumstances are forecast accurately and quickly by using multi-sensor fusion technologies on the one hand, and on the other hand, an emergency power supply is cut off automatically by using vantage points installed at the door or near a channel, and people in trouble are guided and evacuated emergently, thereby avoiding occurrence of great property loss and personnel injury accidents.
Description
Technical field
The utility model relates to a kind of intercom system technical field, relates in particular to a kind of video intercom indoor terminal.
Background technology
Along with living and the improvement of office conditions, people are also more and more higher to the requirement of building safety, wish on the one hand video intercom and other system organically to combine, form a strong security protection network, on the other hand, also wish that video interphone terminal possesses more utility function.
Current video interphone terminal both domestic and external, has mainly realized door lock control and video intercom function, the utility functions such as not yet integrated fire-fighting, safety precaution, fire forecast.Video interphone terminal is generally arranged near doorway, near passway for escaping.Utilize this advantage, in the time there is hidden danger, if video interphone terminal performance emergency evacuation is guided, will further reduce unnecessary casualties, build safer inhabitation, working environment.
Utility model content
The purpose of this utility model is exactly in order to address the above problem, and has proposed a kind of video intercom indoor terminal.This terminal embedded micro-processor, supports TCP/IP, CAN, RS485 agreement, can be seamless integrated with the system such as security protection, fire-fighting, elevator control, video monitoring.
To achieve these goals, the utility model adopts following technical scheme:
A kind of video intercom indoor terminal, comprising: microprocessor is connected respectively with video intercom module, safety monitoring module, emergency power pack automatic switching module, emergency evacuation module and communication interface.
Described safety monitoring module comprises: smoke detection circuit, temperature detection circuit and gas leakage detection circuit.
Described smoke detection circuit comprises: sense channel circuit and reference channel circuit be two input ends of access differential amplifying circuit one respectively, and the output terminal of differential amplifier circuit one and threshold value comparator circuit one are connected in series.
While there is dangerous situation, indoor terminal detects effective passage automatically, sends signal guide evacuating personnel by described emergency evacuation module; Meanwhile, indoor terminal sends warning help signal by communication interface to residential property center, security protection or fire-fighting system.
In described smoke detection circuit, sense channel circuit comprises: sense channel circuit comprises: the light emitting diode positive pole of resistance R 27 1 termination supply voltage VDD, other end access photoelectrical coupler U1 input end, described light emitting diode minus earth; The collector of resistance R 29 1 termination supply voltage VCC, other end access photoelectrical coupler U1 output terminal phototriode, the emitter of described phototriode is connected with the base stage of triode Q2, the collector of triode Q2 through resistance R 34 be connected with supply voltage VCC, grounded emitter; Resistance R 32 1 ends are connected between photoelectrical coupler U1 and triode Q2, other end ground connection.
Reference channel circuit comprises: the light emitting diode positive pole of resistance R 28 1 termination supply voltage VDD, other end access photoelectrical coupler U2 input end, described light emitting diode minus earth; The collector of resistance R 30 1 termination supply voltage VCC, other end access photoelectrical coupler U2 output terminal phototriode, the emitter of described phototriode is connected with the base stage of triode Q3, the collector of triode Q3 through resistance R 33 be connected with supply voltage VCC, grounded emitter; Resistance R 31 1 ends are connected between photoelectrical coupler U2 and triode Q3, other end ground connection.
Differential amplifier circuit one comprises: positive input and the inverting input that one end is connected with sense channel circuit and reference channel circuit respectively, the other end accesses respectively operational amplifier A R5 of resistance R 35 and resistance R 36, be connected with threshold value comparator circuit after the output terminal series resistor R39 of operational amplifier A R5; Resistance R 37 one end are connected with the positive input of operational amplifier A R5, other end ground connection; Resistance R 38 is serially connected between the inverting input and output terminal of operational amplifier A R5.
Threshold value comparator circuit one comprises: resistance R 41 one end are connected with resistance R 39, the inverting input of other end access operational amplifier A R8; Resistance R 40 1 termination VCC power supplys, the other end connect with variable resistor R69 after ground connection; Resistance R 42 1 ends are connected between resistance R 40 and resistance R 69, the positive input of other end access operational amplifier A R8; Resistance R 43 is serially connected between the positive input and output terminal of operational amplifier A R8; After the output terminal series resistor R44 of operational amplifier A R8, access microprocessor; Ground connection after one end access microprocessor of diode D9, the other end are connected in series with diode D10 is anti-phase.
Described temperature detection circuit comprises: constant-current source circuit, bridge input circuit, differential amplifier circuit two, low-pass filter circuit, high-pass filtering circuit and in-phase amplification circuit one are connected in series successively.
Described constant-current source circuit comprises: a termination supply voltage VCC of resistance R 2, the positive input of other end access operational amplifier A R1; Positive input, the other end ground connection of the positive pole access operational amplifier A R1 of diode D1; Resistance R 3 one end are connected with the inverting input of operational amplifier A R1, other end ground connection.
Bridge input circuit comprises: thermal resistance PT1, resistance R 4, variable resistor R49 are composed in series series arm one successively, resistance PT2 and resistance R 5 are composed in series series arm two, the inverting input of one end access operational amplifier A R1, the output terminal of another termination operational amplifier A R1 after series arm one is in parallel with series arm two.
Differential amplifier circuit two is identical with differential amplifier circuit one structure.
Low-pass filter circuit comprises: one end of resistance R 50 is connected with resistance R 10, the positive input of other end access operational amplifier A R3; Positive input, the other end ground connection of capacitor C 1 one end access operational amplifier A R3; Inverting input, the other end ground connection of resistance R 56 one end access operational amplifier A R3; Resistance R 57 is serially connected between the inverting input and output terminal of operational amplifier A R3; Capacitor C 2 one ends are connected between resistance R 10 and R50, the output terminal of other end access operational amplifier A R3.
High-pass filtering circuit comprises: inverting input, the other end ground connection of resistance R 11 one end access operational amplifier A R4; The output terminal of one end access operational amplifier A R3 of capacitor C 4, the positive input of other end access operational amplifier A R4; Resistance R 12 is serially connected between the inverting input and output terminal of operational amplifier A R4; Positive input, the other end ground connection of resistance R 51 one end access operational amplifier A R4.
In-phase amplification circuit one comprises: the positive input of the output terminal access operational amplifier A R7 of operational amplifier A R4; Inverting input, the other end ground connection of resistance R 60 one end access operational amplifier A R7; Variable resistor R63 is serially connected between the inverting input and output terminal of operational amplifier A R7.
Described gas leakage detection circuit comprises: gas collecting circuit, differential amplifier circuit three, in-phase amplification circuit two and threshold value comparator circuit two are connected in series successively.
Described gas collecting circuit comprises: No. 1, No. 2 of gas sensor MQ and No. 3 pins all access supply voltage VCC, is connected the other end ground connection of resistance R 19 after being connected with No. 6 pins for No. 4 of gas sensor MQ with resistance R 19; Ground connection after No. 5 pin series resistor R18 of gas sensor MQ, a termination supply voltage VCC, other end ground connection after resistance R 20 and resistance R 21 series connection.
In-phase amplification circuit two is identical with in-phase amplification circuit one structure; Threshold value comparator circuit two is identical with threshold value comparator circuit one structure.
Differential amplifier circuit three comprises: between No. 4 of No. 2 pins access gas sensor MQ of operational amplifier A R11 and No. 6 pins, between No. 3 pins access resistance R 20 and R21, after No. 5 pin ground connection of operational amplifier A R11, No. 6 pin series resistor R61, access amplifying circuit two in the same way, variable resistor R64 is serially connected between No. 8 pins No. 1 of operational amplifier A R11, No. 4 of operational amplifier A R11 and No. 7 pins unsettled.
Described emergency power pack automatic switching module comprises: city's power detection circuit and EPS control switching circuit; Described city power detection circuit and EPS control switching circuit access respectively the AD sample port of microprocessor.
Described city power detection circuit comprises: current acquisition unit, signal conditioning circuit are connected in series successively.
Described current acquisition unit comprises: No. 1 connect+15V of pin power supply of Hall current sensor, No. 2 connect-15V of pin power supplys, No. 1 pin of capacitor C 3 one termination Hall current sensors, other end ground connection, No. 2 pins of capacitor C 5 one termination Hall current sensors, other end ground connection, No. 3 pins ground connection after resistance R 52 of Hall current sensor, No. 3 pins of Hall current sensor are connected with No. 3 pins of operational amplifier TL074.
Described signal conditioning circuit comprises: No. 1 pin of operational amplifier TL074 is connected with No. 2 pins, No. 3 pins of operational amplifier TL074 are connected with current acquisition unit, No. 4 connect+15V of pin power supplys, No. 11 connect-15V of pin power supplys, and resistance R 53 one end are connected with No. 1 pin of operational amplifier TL074, No. 6 pins of other end access operational amplifier TL074; No. 6 pins of resistance R 54 1 termination supply voltages, other end access operational amplifier TL074; Resistance R 55 is serially connected between No. 7 pins No. 6 of operational amplifier TL074, resistance R 58 is serially connected between No. 9 pins No. 7 of operational amplifier TL074, resistance R 59 is serially connected between No. 9 pins No. 8 of operational amplifier TL074, No. 5 and No. 10 pin ground connection of operational amplifier TL074; No. 8 pins of operational amplifier TL074 are connected between the diode D5 and diode D6 being connected in series, a termination power, other end ground connection after diode D5 and diode D6 series connection.
Described EPS control switching circuit comprises: resistance R 45 is connected in series the base stage into triode Q5, and one end of resistance R 46 and resistance R 47 connects respectively power supply VCC, the other end accesses respectively base stage and the collector of triode Q5; No. 1 pin of the emitter access solid-state relay SSR of triode Q5, accesses after No. 2 pin ground connection of solid-state relay SSR, No. 3 pin accesses, No. 4 pin series connection emergency power pack EPS; Between resistance R 48 is connected and is attempted by after light emitting diode D4, capacitor C 6 is attempted by using electricity system two ends.
Described emergency evacuation module comprises: the light emitting diode positive pole of resistance R 13 1 termination supply voltage VCC, other end access photoelectrical coupler U3 input end, described light emitting diode negative pole access microprocessor AD sampling end; The collector of resistance R 14 1 termination supply voltage VDD, other end access photoelectrical coupler U3 output terminal phototriode, the emitter of described phototriode is connected with the base stage of triode Q1 with after resistance R 15 series connection, after the collector series resistance R16 of triode Q1, be connected the grounded emitter of triode Q1 with the base stage of triode Q4; After the series arm of diode D2, resistance R 17 and light emitting diode D3, bulb DS1 are in parallel successively, emitter, the other end ground connection of one end, shunt circuit access triode Q4; The collector of triode Q4 connects VDD power supply.
Described indoor terminal is supported TCP/IP, CAN, RS485 communications protocol, can be with video monitoring, security protection, fire-fighting, that apparatus for controlling elevator is seamless is integrated.
This terminal is possessing on basic video intercom, door lock control basis, also comprises following functions:
1) Multi-sensor Fusion, realizes and accurately judges fast the dangerous sight such as disaster hidden-trouble, natural gas leaking; Detection circuit comprises: smoke detection, temperature sensing, gas leakage are surveyed.
2) this terminal and residential property center cluster, is detecting after the condition of a fire, can report to the police to property center on the one hand, possesses on the other hand emergency evacuation management function, and guiding owner escape is saved oneself.
3) can seek help to residential property center emergency alarm.
4) emergency power pack automatic switching.In the time fire fault being detected, disconnect non-fire-fighting load, terminal is cut emergency power pack automatically, to ensure that necessary function normally works.
5) in addition, this terminal adopts standardized Interface design, has higher dirigibility, can be applicable to other system, as security protection, elevator control etc.
The beneficial effects of the utility model are:
Utilize on the one hand multi-sensor fusion technology, accurate, Fast Prediction dangerous situation, on the other hand, utilize and be arranged on doorway, near the vantage point of passage, while having an accident, automatically cuts emergency power pack, urgent guiding, evacuation indicator of trapped personnel.Avoid the heavy losses of property, personnel's injury accident to occur.In addition, the utility model can with lay, the system such as fire-fighting, elevator is seamless integrated, realize multisystem, multi-functional complementation, help each other, thereby build more comfortable, a safe inhabitation, working environment.
Brief description of the drawings
Fig. 1 is the utility model video intercom indoor terminal structural representation;
Fig. 2 is the utility model video intercom and the integrated schematic diagram of other system;
Fig. 3 is the utility model smoke detection circuit diagram;
Fig. 4 is the utility model temperature detection circuit figure;
Fig. 5 is the utility model gas leakage detection circuit figure;
Fig. 6 is the utility model city power detection circuit figure;
Fig. 7 is the utility model EPS control switching circuit figure;
Fig. 8 is the utility model emergency evacuation module circuit diagram.
Wherein, 1. microprocessor, 2. video intercom module, 3. safety monitoring module, 4. emergency power pack automatic switching module, 5. emergency evacuation module, 6. communication interface, 7. sense channel circuit, 8. reference channel circuit, 9. differential amplifier circuit one, 10. threshold value comparator circuit one, 11. constant-current source circuits, 12. bridge input circuits, 13. differential amplifier circuits two, 14. low-pass filter circuits, 15. high-pass filtering circuits, 16. in-phase amplification circuits one, 17. gas collecting circuit, 18. differential amplifier circuits three, 19. in-phase amplification circuits two, 20. threshold value comparator circuits two, 21. current acquisition unit, 22. signal conditioning circuits.
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the utility model is described further:
As shown in Figure 1, a kind of video intercom indoor terminal, comprising: microprocessor 1, video intercom module 2: for realizing the video intercom function of described indoor terminal and outdoor terminals; Safety monitoring module 3: for indoor smog, temperature and combustion gas being detected and automatic alarm; Emergency power pack automatic switching module 4: for detection of city's electricity condition and realize civil power and EPS power supply between automatic switchover; Emergency evacuation module 5: while there is dangerous situation, indoor terminal detects effective passage automatically, sends signal and guides evacuating personnel; And communication interface 6: be connected and communicate by letter with fire-fighting center with other intercommunication terminals, residential property center, security protection for realizing indoor terminal; While there is dangerous situation, described indoor terminal sends warning help signal to residential property center, security protection or fire-fighting system; Described video intercom module, safety monitoring module, emergency power pack automatic switching module, emergency evacuation module are connected with microprocessor respectively with communication interface.
This terminal is supported TCP/IP, CAN, RS485 communications protocol, can be with video monitoring, security protection, fire-fighting, that apparatus for controlling elevator is seamless is integrated.Network topology structure as shown in Figure 2.
Smoke detection circuit comprises: sense channel circuit 7 and reference channel circuit 8 two input ends of access differential amplifying circuit 1 respectively, the output terminal of differential amplifier circuit 1 and threshold value comparator circuit 1 are connected in series, as shown in Figure 3.
By the seal channel that shroud of gas only allows visible ray to see through with reference to channel circuit 8, light emitting diode, phototriode and the light signal amplification circuit being made up of R29, R32, R34, Q2 form.
Threshold value comparator circuit 1 comprises: resistance R 41 one end are connected with resistance R 39, the inverting input of other end access operational amplifier A R8; Resistance R 40 1 termination VCC power supplys, the other end connect with variable resistor R69 after ground connection; Resistance R 42 1 ends are connected between resistance R 40 and resistance R 69, the positive input of other end access operational amplifier A R8; Resistance R 43 is serially connected between the positive input and output terminal of operational amplifier A R8; After the output terminal series resistor R44 of operational amplifier A R8, access microprocessor; Ground connection after one end access microprocessor of diode D9, the other end are connected in series with diode D10 is anti-phase.
Its principle of work is:
Be mainly used in eliminating visible ray interference, noise with reference to passage.In the time having smog to produce, sense channel is because smog covers, and phototriode output voltage changes.By the light signal output of two passages is done to poor amplification, can eliminate preferably visible ray interference and clutter noise impact, accurately reflect indoor smog concentration change.For avoiding sensor wrong report, and frequently switch, designed threshold value comparator circuit.In the time that smokescope reaches setting restriction, send alerting signal.
Adopt phototriode receiving optical signals with reference to channel circuit 8, sense channel circuit 7, and amplify with one 9 pairs of faint optical signals of differential amplifier circuit; Utilize differential amplifier circuit 1 to obtain smokescope and change, eliminated preferably visible ray, noise; Threshold value comparator circuit 1 has avoided system frequently to switch.
Temperature detection circuit comprises: constant-current source circuit 11, bridge input circuit 12, differential amplifier circuit 2 13, low-pass filter circuit 14, high-pass filtering circuit 15 and in-phase amplification circuit 1 are connected in series successively, as shown in Figure 4.Constant-current source circuit 11 provides constant, precision current for detection circuit.Thermal resistance PT1 is positioned on a brachium pontis of bridge-type input.The input of employing bridge-type, is conducive to pick up temperature variation signal on the one hand, can regulate easily on the other hand zero point, correcting sensor.In the time that temperature changes, resistance value and the temperature of thermal resistance PT1 are approximately linear relationship, utilize this characteristic, can detect the temperature value in environment.Differential amplifier circuit two further obtains temperature variation signal, and is converted into voltage signal.Amplify through low-pass filtering, high-pass filtering and homophase, the AD that temperature information is input to controller gathers port, realizes high-precision temperature detection.
Constant-current source circuit 11 in temperature detection circuit comprises: a termination supply voltage VCC of resistance R 2, the positive input of other end access operational amplifier A R1; Positive input, the other end ground connection of the positive pole access operational amplifier A R1 of diode D1; Resistance R 3 one end are connected with the inverting input of operational amplifier A R1, other end ground connection.
Low-pass filter circuit 14 comprises: one end of resistance R 50 is connected with resistance R 10, the positive input of other end access operational amplifier A R3; Positive input, the other end ground connection of capacitor C 1 one end access operational amplifier A R3; Inverting input, the other end ground connection of resistance R 56 one end access operational amplifier A R3; Resistance R 57 is serially connected between the inverting input and output terminal of operational amplifier A R3; Capacitor C 2 one ends are connected between resistance R 10 and R50, the output terminal of other end access operational amplifier A R3.
High-pass filtering circuit 15 comprises: inverting input, the other end ground connection of resistance R 11 one end access operational amplifier A R4; The output terminal of one end access operational amplifier A R3 of capacitor C 4, the positive input of other end access operational amplifier A R4; Resistance R 12 is serially connected between the inverting input and output terminal of operational amplifier A R4; Positive input, the other end ground connection of resistance R 51 one end access operational amplifier A R4.
In-phase amplification circuit 1 comprises: the positive input of the output terminal access operational amplifier A R7 of operational amplifier A R4; Inverting input, the other end ground connection of resistance R 60 one end access operational amplifier A R7; Variable resistor R63 is serially connected between the inverting input and output terminal of operational amplifier A R7.
Gas leakage detection circuit comprises: gas collecting circuit 17, differential amplifier circuit 3 18, in-phase amplification circuit 2 19 and threshold value comparator circuit 2 20 are connected in series successively, as shown in Figure 5.The bridge conversion circuit that gas collecting part is made up of gas sensor MQ and R18, R19, R20, R21 forms.In the time having the combustible gas leakage such as coal gas, rock gas, gas sensor MQ internal resistance changes, and bridge conversion circuit is grabbed this internal resistance variation to be changed to change in voltage, exports to the differential amplifier circuit 3 18 for instrument of rear class.Differential amplifier circuit 3 18 further obtains this variable signal, after amplifying, exports to threshold value comparator circuit 2 20.For avoiding sensor wrong report, design threshold value comparator circuit 2 20.In the time that gas concentration reaches a threshold value, send alerting signal.
When breaking out of fire, will excise all non-fire-fighting loads, for guaranteeing the steady operation of video interphone terminal normal function, design emergency power pack automatic switching circuit 4.Automatic switching circuit 4 is made up of civil power observation circuit, EPS control switching circuit.
As shown in Figure 6, civil power observation circuit is made up of current acquisition, signal conditioning circuit.Hall current sensor gathers mains current signal, by R52, current signal is converted to voltage signal, after voltage follow, anti-phase addition, amplification, exports to controller AD sample port.The effect of voltage follow is to improve circuit input impedance; The effect of anti-phase addition is to change the AC signal of variation into direct current signal; The effect of anti-phase amplification is that faint direct current signal level variation range is nursed one's health to the acceptable level variation range of microcontroller.
Described city power detection circuit comprises: current acquisition unit 21, signal conditioning circuit 22 are connected in series successively.
Described signal conditioning circuit 22 is made up of voltage follow, anti-phase addition and see-saw circuit, comprise: No. 1 pin of operational amplifier TL074 is connected with No. 2 pins, No. 3 pins of operational amplifier TL074 are connected with current acquisition unit, No. 4 connect+15V of pin power supplys, No. 11 connect-15V of pin power supplys, and resistance R 53 one end are connected with No. 1 pin of operational amplifier TL074, No. 6 pins of other end access operational amplifier TL074; No. 6 pins of resistance R 54 1 termination supply voltages, other end access operational amplifier TL074; Resistance R 55 is serially connected between No. 7 pins No. 6 of operational amplifier TL074, resistance R 58 is serially connected between No. 9 pins No. 7 of operational amplifier TL074, resistance R 59 is serially connected between No. 9 pins No. 8 of operational amplifier TL074, No. 5 and No. 10 pin ground connection of operational amplifier TL074; No. 8 pins of operational amplifier TL074 are connected between the diode D5 and diode D6 being connected in series, a termination power, other end ground connection after diode D5 and diode D6 series connection.
As shown in Figure 7, EPS control switching circuit comprises: resistance R 45 is connected in series the base stage into triode Q5, and one end of resistance R 46 and resistance R 47 connects respectively power supply VCC, the other end accesses respectively base stage and the collector of triode Q5; No. 1 pin of the emitter access solid-state relay SSR of triode Q5, accesses after No. 2 pin ground connection of solid-state relay SSR, No. 3 pin accesses, No. 4 pin series connection emergency power pack EPS; Between resistance R 48 is connected and is attempted by after light emitting diode D4, capacitor C 6 is attempted by using electricity system two ends.
Driving circuit is to be made up of resistance R 46, resistance R 47, triode Q5.The driving circuit of design matches with solid-state relay, can drive reliably relay switch on the one hand.Adopt on the other hand solid-state relay, strengthened the antijamming capability of circuit.
EPS is power supply in support, in the time of breaking out of fire fault, is system power supply.
Indicating circuit is made up of resistance R 48, diode D4, for display circuit working condition.
Filtering circuit is made up of capacitor C 6, for the high frequency interference of filtering EPS power supply.
When system is normally worked, civil power observation circuit Real-time Collection mains current, in the time occurring that mains current effective value is zero, system is thought city electroblation is occurred, and will automatically cut EPS emergency power pack, ensures that video interphone terminal normally works.
In the time of the danger situation such as breaking out of fire, gas leakage, video interphone terminal, on the one hand to residential property center emergency alarm, informs that property personnel take Disposal Measures as early as possible.On the other hand, send broadcast singal, light index signal, guiding personnel self-help escape.
Under the dangerous situations such as fire, indicator of trapped personnel easily produces fear, in a hurry at heart, is arranged near favorable terrain doorway by video interphone terminal, fire situation detected, terminal will be sent high light and guides and play broadcast, and guiding personnel withdraw as early as possible, improve emergency disposal ability.
As shown in Figure 8, the evacuation lighting control circuit of design is made up of light-coupled isolation, first order driving, second level driving, major light load and indicating circuit, continuous current circuit.Wherein:
Light-coupled isolation has improved the antijamming capability of circuit; The first order drives and is made up of resistance R 15, triode Q1, and the second level drives and is made up of resistance R 16, triode Q4, and two-stage drive, has further improved output current ability, makes major light brightness higher; Indicating circuit is made up of resistance R 17, diode D3, the instruction of whether working as circuit.
Continuous current circuit is made up of diode D2.Continuous current circuit, turn-offing moment of major light, for electric current provides afterflow passage, has avoided shutoff superpotential to produce, and makes that circuit is more reliable, safety.
The specific works method of this terminal:
(1) Multi-sensor Fusion forecast hidden danger
The utility model has designed smoke detection, temperature sensing and gas leakage and has surveyed.Each sensor works alone, and when smoke detection and temperature sensing send while reporting to the police simultaneously, confirms as fire failure.In the time of gas leakage detection alarm, confirm as gas leakage accident.Adopt multi-sensor technology measure, reduced wrong report, improved accuracy.
(2) emergency evacuation management
In the time that secret occurs, the utility model is reported to the police to property center on the one hand, reminds related personnel to take measures as early as possible, avoids secret further to worsen.On the other hand, open fire broadcast, lamplight pointing, guiding householder self-help escape.
(3) emergency power pack automatically switches
When breaking out of fire, cutting off after all non-fire-fighting loads, the utility model will be cut emergency power pack automatically, to ensure the normal work of emergency evacuation management function.
(4) flash appeal
This terminal and residential property center cluster, in the time that user finds danger, can be at any time to property center flash appeal, improve the security of office, living environment.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the not restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendments that creative work can make or distortion still in protection domain of the present utility model.
Claims (10)
1. a video intercom indoor terminal, is characterized in that, comprising: microprocessor is connected respectively with video intercom module, safety monitoring module, emergency power pack automatic switching module, emergency evacuation module and communication interface;
Described safety monitoring module comprises: smoke detection circuit, temperature detection circuit and gas leakage detection circuit;
Described smoke detection circuit comprises: sense channel circuit and reference channel circuit be two input ends of access differential amplifying circuit one respectively, and the output terminal of differential amplifier circuit one and threshold value comparator circuit one are connected in series.
2. a kind of video intercom indoor terminal as claimed in claim 1, it is characterized in that, in described smoke detection circuit, sense channel circuit comprises: sense channel circuit comprises: the light emitting diode positive pole of resistance R 27 1 termination supply voltage VDD, other end access photoelectrical coupler U1 input end, described light emitting diode minus earth; The collector of resistance R 29 1 termination supply voltage VCC, other end access photoelectrical coupler U1 output terminal phototriode, the emitter of described phototriode is connected with the base stage of triode Q2, the collector of triode Q2 through resistance R 34 be connected with supply voltage VCC, grounded emitter; Resistance R 32 1 ends are connected between photoelectrical coupler U1 and triode Q2, other end ground connection;
Reference channel circuit comprises: the light emitting diode positive pole of resistance R 28 1 termination supply voltage VDD, other end access photoelectrical coupler U2 input end, described light emitting diode minus earth; The collector of resistance R 30 1 termination supply voltage VCC, other end access photoelectrical coupler U2 output terminal phototriode, the emitter of described phototriode is connected with the base stage of triode Q3, the collector of triode Q3 through resistance R 33 be connected with supply voltage VCC, grounded emitter; Resistance R 31 1 ends are connected between photoelectrical coupler U2 and triode Q3, other end ground connection;
Differential amplifier circuit one comprises: positive input and the inverting input that one end is connected with sense channel circuit and reference channel circuit respectively, the other end accesses respectively operational amplifier A R5 of resistance R 35 and resistance R 36, be connected with threshold value comparator circuit after the output terminal series resistor R39 of operational amplifier A R5; Resistance R 37 one end are connected with the positive input of operational amplifier A R5, other end ground connection; Resistance R 38 is serially connected between the inverting input and output terminal of operational amplifier A R5;
Threshold value comparator circuit one comprises: resistance R 41 one end are connected with resistance R 39, the inverting input of other end access operational amplifier A R8; Resistance R 40 1 termination VCC power supplys, the other end connect with variable resistor R69 after ground connection; Resistance R 42 1 ends are connected between resistance R 40 and resistance R 69, the positive input of other end access operational amplifier A R8; Resistance R 43 is serially connected between the positive input and output terminal of operational amplifier A R8; After the output terminal series resistor R44 of operational amplifier A R8, access microprocessor; Ground connection after one end access microprocessor of diode D9, the other end are connected in series with diode D10 is anti-phase.
3. a kind of video intercom indoor terminal as claimed in claim 1, it is characterized in that, described temperature detection circuit comprises: constant-current source circuit, bridge input circuit, differential amplifier circuit two, low-pass filter circuit, high-pass filtering circuit and in-phase amplification circuit one are connected in series successively.
4. a kind of video intercom indoor terminal as claimed in claim 3, is characterized in that, described constant-current source circuit comprises: a termination supply voltage VCC of resistance R 2, the positive input of other end access operational amplifier A R1; Positive input, the other end ground connection of the positive pole access operational amplifier A R1 of diode D1; Resistance R 3 one end are connected with the inverting input of operational amplifier A R1, other end ground connection;
Bridge input circuit comprises: thermal resistance PT1, resistance R 4, variable resistor R49 are composed in series series arm one successively, resistance PT2 and resistance R 5 are composed in series series arm two, the inverting input of one end access operational amplifier A R1, the output terminal of another termination operational amplifier A R1 after series arm one is in parallel with series arm two;
Differential amplifier circuit two is identical with differential amplifier circuit one structure;
Low-pass filter circuit comprises: one end of resistance R 50 is connected with resistance R 10, the positive input of other end access operational amplifier A R3; Positive input, the other end ground connection of capacitor C 1 one end access operational amplifier A R3; Inverting input, the other end ground connection of resistance R 56 one end access operational amplifier A R3; Resistance R 57 is serially connected between the inverting input and output terminal of operational amplifier A R3; Capacitor C 2 one ends are connected between resistance R 10 and R50, the output terminal of other end access operational amplifier A R3;
High-pass filtering circuit comprises: inverting input, the other end ground connection of resistance R 11 one end access operational amplifier A R4; The output terminal of one end access operational amplifier A R3 of capacitor C 4, the positive input of other end access operational amplifier A R4; Resistance R 12 is serially connected between the inverting input and output terminal of operational amplifier A R4; Positive input, the other end ground connection of resistance R 51 one end access operational amplifier A R4;
In-phase amplification circuit one comprises: the positive input of the output terminal access operational amplifier A R7 of operational amplifier A R4; Inverting input, the other end ground connection of resistance R 60 one end access operational amplifier A R7; Variable resistor R63 is serially connected between the inverting input and output terminal of operational amplifier A R7.
5. a kind of video intercom indoor terminal as claimed in claim 1, is characterized in that, described gas leakage detection circuit comprises: gas collecting circuit, differential amplifier circuit three, in-phase amplification circuit two and threshold value comparator circuit two are connected in series successively.
6. a kind of video intercom indoor terminal as claimed in claim 5, it is characterized in that, described gas collecting circuit comprises: No. 1, No. 2 of gas sensor MQ and No. 3 pins all access supply voltage VCC, be connected afterwards and be connected with resistance R 19, the other end ground connection of resistance R 19 with No. 6 pins for No. 4 of gas sensor MQ; Ground connection after No. 5 pin series resistor R18 of gas sensor MQ, a termination supply voltage VCC, other end ground connection after resistance R 20 and resistance R 21 series connection;
In-phase amplification circuit two is identical with in-phase amplification circuit one structure; Threshold value comparator circuit two is identical with threshold value comparator circuit one structure;
Differential amplifier circuit three comprises: between No. 4 of No. 2 pins access gas sensor MQ of operational amplifier A R11 and No. 6 pins, between No. 3 pins access resistance R 20 and R21, after No. 5 pin ground connection of operational amplifier A R11, No. 6 pin series resistor R61, access amplifying circuit two in the same way, variable resistor R64 is serially connected between No. 8 pins No. 1 of operational amplifier A R11, No. 4 of operational amplifier A R11 and No. 7 pins unsettled.
7. a kind of video intercom indoor terminal as claimed in claim 1, is characterized in that, described emergency power pack automatic switching module comprises: city's power detection circuit and EPS control switching circuit; Described city power detection circuit and EPS control switching circuit access respectively the AD sample port of microprocessor.
8. a kind of video intercom indoor terminal as claimed in claim 7, is characterized in that, described city power detection circuit comprises: current acquisition unit, signal conditioning circuit are connected in series successively;
Described current acquisition unit comprises: No. 1 connect+15V of pin power supply of Hall current sensor, No. 2 connect-15V of pin power supplys, No. 1 pin of capacitor C 3 one termination Hall current sensors, other end ground connection, No. 2 pins of capacitor C 5 one termination Hall current sensors, other end ground connection, No. 3 pins ground connection after resistance R 52 of Hall current sensor, No. 3 pins of Hall current sensor are connected with No. 3 pins of operational amplifier TL074;
Described signal conditioning circuit comprises: No. 1 pin of operational amplifier TL074 is connected with No. 2 pins, No. 3 pins of operational amplifier TL074 are connected with current acquisition unit, No. 4 connect+15V of pin power supplys, No. 11 connect-15V of pin power supplys, and resistance R 53 one end are connected with No. 1 pin of operational amplifier TL074, No. 6 pins of other end access operational amplifier TL074; No. 6 pins of resistance R 54 1 termination supply voltages, other end access operational amplifier TL074; Resistance R 55 is serially connected between No. 7 pins No. 6 of operational amplifier TL074, resistance R 58 is serially connected between No. 9 pins No. 7 of operational amplifier TL074, resistance R 59 is serially connected between No. 9 pins No. 8 of operational amplifier TL074, No. 5 and No. 10 pin ground connection of operational amplifier TL074; No. 8 pins of operational amplifier TL074 are connected between the diode D5 and diode D6 being connected in series, a termination power, other end ground connection after diode D5 and diode D6 series connection.
9. a kind of video intercom indoor terminal as claimed in claim 7; it is characterized in that; described EPS control switching circuit comprises: resistance R 45 is connected in series the base stage into triode Q5, and one end of resistance R 46 and resistance R 47 connects respectively power supply VCC, the other end accesses respectively base stage and the collector of triode Q5; No. 1 pin of the emitter access solid-state relay SSR of triode Q5, accesses after No. 2 pin ground connection of solid-state relay SSR, No. 3 pin accesses, No. 4 pin series connection emergency power pack EPS; Between resistance R 48 is connected and is attempted by after light emitting diode D4, capacitor C 6 is attempted by using electricity system two ends.
10. a kind of video intercom indoor terminal as claimed in claim 1, it is characterized in that, described emergency evacuation module comprises: the light emitting diode positive pole of resistance R 13 1 termination supply voltage VCC, other end access photoelectrical coupler U3 input end, described light emitting diode negative pole access microprocessor AD sampling end; The collector of resistance R 14 1 termination supply voltage VDD, other end access photoelectrical coupler U3 output terminal phototriode, the emitter of described phototriode is connected with the base stage of triode Q1 with after resistance R 15 series connection, after the collector series resistance R16 of triode Q1, be connected the grounded emitter of triode Q1 with the base stage of triode Q4; After the series arm of diode D2, resistance R 17 and light emitting diode D3, bulb DS1 are in parallel successively, emitter, the other end ground connection of one end, shunt circuit access triode Q4; The collector of triode Q4 connects VDD power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420050277.0U CN203689648U (en) | 2014-01-26 | 2014-01-26 | Visual intercom indoor terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420050277.0U CN203689648U (en) | 2014-01-26 | 2014-01-26 | Visual intercom indoor terminal |
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| CN203689648U true CN203689648U (en) | 2014-07-02 |
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| CN201420050277.0U Expired - Fee Related CN203689648U (en) | 2014-01-26 | 2014-01-26 | Visual intercom indoor terminal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104898612A (en) * | 2015-04-17 | 2015-09-09 | 佛山络威网络技术有限公司 | Building talkback indoor extension set and control method thereof |
| CN105554432A (en) * | 2016-03-01 | 2016-05-04 | 珠海太川云社区技术股份有限公司 | Visual intercom system and method for achieving point-to-point of tree-type network |
-
2014
- 2014-01-26 CN CN201420050277.0U patent/CN203689648U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104898612A (en) * | 2015-04-17 | 2015-09-09 | 佛山络威网络技术有限公司 | Building talkback indoor extension set and control method thereof |
| CN105554432A (en) * | 2016-03-01 | 2016-05-04 | 珠海太川云社区技术股份有限公司 | Visual intercom system and method for achieving point-to-point of tree-type network |
| CN105554432B (en) * | 2016-03-01 | 2019-02-26 | 珠海太川云社区技术股份有限公司 | A kind of tree network realizes point-to-point visual-speaking system and method |
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