CN108305433A - A kind of design of SCM Based domestic intelligent fire-proof and theft-proof alarm - Google Patents
A kind of design of SCM Based domestic intelligent fire-proof and theft-proof alarm Download PDFInfo
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- CN108305433A CN108305433A CN201710016924.4A CN201710016924A CN108305433A CN 108305433 A CN108305433 A CN 108305433A CN 201710016924 A CN201710016924 A CN 201710016924A CN 108305433 A CN108305433 A CN 108305433A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B19/00—Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow
- G08B19/005—Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow combined burglary and fire alarm systems
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/08—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines
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Abstract
The invention patent relates to a kind of designs of SCM Based domestic intelligent fire-proof and theft-proof alarm, the present invention devises a kind of based on public telephone network, the Domestic two fire-proof and theft-proof intelligent alarm system of MULTISENSOR INTEGRATION application, the system is with smoke sensor device, temperature sensor, far infrared sensor, microwave remote sensor and CO sensors are detecting element, with 89C51 microcontrollers core in order to control, form a kind of automatic fire prevention anti-theft alarm system, it can alarm in several ways, and it is transmitted into row information by the modern communications such as phone means, this system various pieces can connect each other with monolithic machine host, anti-theft alarm system is managed concentratedly and is controlled to enable the system to.
Description
Technical field
The invention patent relates to electronic design art more particularly to a kind of SCM Based domestic intelligent fire prevention are anti-
Steal the design of alarm.
Background technology
Warning device is most important for protecting the safety of life and property of people.Burglar alarm product is in China at present
Popularity rate only has 20%, compared with the developed countries such as America and Europe are up to 70% popularity rate, the development in China burglar alarm product market
It just starts to walk, the degree of recognition and popularity rate especially in terms of home security alarm system are lower.As people's safety precaution is anticipated
The raising of knowledge has more persons with household safety-protection alarming product, it is anticipated that home security alarm system will have very
Wide development space.Existing home security alarm system can be divided into interconnection type and single-apartment two major classes by field of employment.
Interconnection type home security alarm system is made of the security alarm center of community-type, alarm multiple personal alarm systems by networking
Center generally uses warning receiver, computer system and printer apparatus etc..When alert event occurs, the data of alarm point
It is shown in the corresponding position of electronic map, simultaneous computer system can recall the various data moneys of configuration and scene of alarm point
Material quickly judges and handles for policeman person.Interconnection type home security alarm system is mainly used in newly-built community, and
User is needed generally to receive the system.
With the rapid hair of modern electronic technology, computer technology, the communication technology, sensing technology and manufacturing industry technology etc.
Exhibition, in relation to household safety-protection alarm in terms of product also more and more enrich.Recent domestic is just like Bosch, Honeywell, Chinese mugwort
Li Fukeli letters, connection is risen, macro Tai Dengduojia brands company has developed a series of household safety-protection alarming product, they can
By by the functions such as completing some alarms in a manner of wired or wireless and seeking help, and compare successful application.Such as
The alarm host machine LT-B2102/ZX1 of Shanghai Lian Teng companies has call voice remote alarming function, including supports to pass through public power
Phone network or GSM（Cell phone network）Remote alarms, support continuously dial 5 groups of preset telephone numbers and carry out audio alert；It can lead to
It crosses local exchange switch and carries out the preset of alarm call number；Also have the function of remote control using telephone, i.e., by public telephone network or
GSM（Cell phone network）Remote control, such as can remotely be deployed troops on garrison duty alarm host machine by phone（Password is inputted according to prompt）,
Major light is opened, siren alarm is opened and long-range alert confirmation etc. is carried out to alarm signal.
It will be especially in China with people as the Developing mainstream of 21 century construction industry it is contemplated that intelligent dwelling is intelligently small
Living standard increasingly improve evaluation residential quarters important indicator.Whether residential quarters are intelligent, and whether safety-protection system is complete
It is standby, reliably will as evaluation residential quarters important indicator.
Patent of invention content
The invention patent relates to a kind of design of SCM Based domestic intelligent fire-proof and theft-proof alarm, the present invention devises one
The Domestic two fire-proof and theft-proof intelligent alarm system that kind is applied based on public telephone network, MULTISENSOR INTEGRATION, the system is with smog
Sensor, temperature sensor, far infrared sensor, microwave remote sensor and CO sensors are detecting element, with 89C51 microcontrollers
Core in order to control, forms a kind of automatic fire prevention anti-theft alarm system, it can alarm in several ways, and by phone
Equal modern communications means are transmitted into row information, and this system various pieces can connect each other with monolithic machine host, to enable the system to
Anti-theft alarm system is managed concentratedly and is controlled.
Description of the drawings
Fig. 1：Home fire safety anti-theft alarm system functional block diagram.
Fig. 2：Composite type fire detector principle schematic.
Fig. 3：Optical detector of fire smoke schematic diagram.
Fig. 4：Dual technology detector principle schematic.
Fig. 5：Automatic dialing alarm circuit diagram.
Fig. 6：Voice alarm circuit block diagram.
Fig. 7：Display circuit figure.
Fig. 8：System software main program flow chart.
Fig. 9：Detect alarm module program flow diagram.
Figure 10：Dial module program flow diagram.
Figure 11：Voice subroutine flow chart.
Figure 12：Voice module program flow diagram.
Figure 13：Key-press module program flow diagram.
Specific implementation mode
In order to make the object, technical solution and advantage of patent of the present invention be more clearly understood, below in conjunction with attached drawing and implementation
Example, is further elaborated patent of the present invention.It should be appreciated that specific embodiment described herein is only used to explain
Patent of the present invention, is not intended to limit the present invention patent.
The invention patent relates to a kind of design of SCM Based domestic intelligent fire-proof and theft-proof alarm, present invention designs
A kind of Domestic two fire-proof and theft-proof intelligent alarm system applied based on public telephone network, MULTISENSOR INTEGRATION, the system with
Smoke sensor device, temperature sensor, far infrared sensor, microwave remote sensor and CO sensors are detecting element, mono- with 89C51
Piece machine core in order to control, forms a kind of automatic fire prevention anti-theft alarm system, it can alarm in several ways, and by
The modern communications such as phone means are transmitted into row information, and this system various pieces can connect each other with monolithic machine host, so as to be
System can be managed concentratedly and be controlled to anti-theft alarm system.
Further, the present invention is a kind of novel electronic security(ELSEC) alarm system, the design of the system be by electron detection,
Intelligent control and telephonic communication technology are combined, to form antitheft, the fire alarm system of a two-stage combined network communication.Intelligence
The hardware of fireproof antitheft alarming system is mainly made of 7 major parts：Sensor detection circuit part, main control unit circuit, DTMF
Dial-up circuit, voice alarm circuit, keyboard interface circuit and display circuit, busy tone, ring-back tone detection circuit.System hardware structure
As shown in Figure 1.
Further, the detection and processing center of alarm host machine of the invention as information is responsible for sending detector
The detection and analysis of alarm signal is to judge the alert type occurred and need the respective handling carried out.Alarm host machine can be complete
At dialing alarm, the processing task of siren, major light, buzzer etc. is opened.
Further, detector of the invention is the alerts for detecting various possible generations, and the alert of generation is led to
Know alarm host machine, is one of critical component of anti-theft alarm system.Sensor is the core element of detector, using different principle
The sensor of making may be constructed variety classes, different purposes, the detector for reaching different detection purposes.
Further, user terminal autoalarm of the invention is installed on residential building, for it is each to residential building not
Different type with position detects intelligent residence anti-theft fireproof alarm system device（Infrared, microwave, photoelectric smoke, temperature, an oxygen
Change carbon）It is monitored and controls, and the data come from the acquisition of each detector are handled.Once someone's illegal burglary, room
When situations such as interior on fire, gas leak occurs, corresponding alarm detector is immediately by corresponding alarm signal（Detector
Number）Send alarm host machine after encryption to, alarm host machine is decoded and judges to alarm signal, obtains type of alarm, really
Recognize it is errorless after, by the telephone line automatic dialing alarm in family, and with central controller foundation contact, relevant information is transmitted
Into central controller.
Further, following function may be implemented in the present invention：89C51 microcontrollers are to dual-tone multifrequency (DTMF) volume, decoder
Control, so that house is passed through telephone network and realize data exchange between relevant departments, dtmf dialing circuit and 89C51 monolithics
Machine completes house and external contact by telephone network.After detector detects fortuitous event, it is issued by alarm level letter
Number at the 89C51 microcontrollers of main control section, microcontroller is handled the level of reading by interface circuit, and then control is double
Sound multi frequency dialing chip dials number number to telephone line, and at the same time control voice chip transfers to the voice recorded in advance
Signal realizes that audio alert, dialing are completed after answering ringback tone, simulates on-hook, to complete to control to region to telephone line
The unit security department at center, 110/119 alarm station telephone set or user send out call signal, inform that other side's house is stolen or has
Fire occurs.Alarm system starts onsite alarming device while dialing alarm, carries out the live light of event（LED）Alarm, and
Start sound circuit, plays the voice prompt sound of corresponding alert.In addition system need not occupy telephone line, when there is alarm signal
When, alarm call enjoys the priority of telephone line.This system is also configured with emergence button, can when family is in an emergency
It is alarmed by the emergence button dial-in direct on alarm host machine keyboard.
Further, fireproofing detector of the invention is by temperature sensing, photoelectric smoke detection and carbon monoxide detecting structure
At composite type fire detector.It is high that multisensor design philosophy solves the rate of false alarm that traditional fireproofing detector always exists
Problem enhances the reliability of detection.Composite type fire detector principle is as shown in Figure 2.By unit Detection Techniques institute
The single parameter fire detector of use causes it to practical fire the inhomogeneities of fire characteristic signal response sensitivity
Detectivity is restricted, in particular for even more particularly important to accurately finding out for home dwelling fire behavior.Therefore, alarm system
To the detection of fire signal using the fire detection technology of multisensor/more criterions in system, the polynary fire that detector is detected
Calamity detection information carries out comprehensive descision through microcontroller, and neural network intelligent algorithm, the Realization of Simulation are added in Software for Design
Polynary synchronous intelligent detection.In fact, various types of fire is responded, usually used different types of fire sensor,
They have the different detection objects stressed.Optical detector of fire smoke not only detectable general fire behavior, especially has smoldering fire fabulous
Effect on Detecting, the smoke particle for being mainly used for fire behavior early stage various burnings detected, and this point just compensates for heat detection
Device is insensitive to smoldering fire, and response speed is slow and cannot distinguish between the heat of fire or air-conditioning or cooks the heat of steam etc. and lacks
Point；Or actually but temperature and optical detector of fire smoke all cannot distinguish between cigarette cooking and steam or the cigarette of some smog fire
Smog increases CO probe portions in the design as a result, can find out the CO ingredients in incipient fire smog, thus significantly
The interference for reducing various environmental factors improves the confidence level of alarm.Neural network algorithm processing is own to be realized, in this system only
Take it treated that alarm signal carries out automatic dialing alarm processing.
Further, hygrosensor of the invention uses digitaltemperaturesensorDS1820, and only there are three pins for it, are
Temperature sensor and signal conditioning circuit are integrated in chip piece, peripheral hardware is saved, application is very convenient.DS1820
Temperature-measurement principle be the relationship varied with temperature using the frequency of temperature sensitive oscillator, temperature signal is converted directly into serial digital
Signal can be achieved temperature to the counting for the cycle oscillator being affected by temperature by internal counter and measure.
Further, the entire circuit of the present invention is broadly divided into infrared pulse emitting portion and receiving portion, once occur
Fire, infrared pulse will occur for the fine particle in smog diffusing reflection, and be transformed into corresponding electric signal, and the signal is by transporting
Put send microcontroller to handle and alarm after exchange is amplified through comparator.Circuit theory is as shown in Figure 3.555 in infrared transmitting circuit
For circuit for generating the adjustable impulse waveform of frequency, a major advantage using 555 circuits is that the duty ratio of output pulse can
It adjusts, convenient for designing the driving output of different requirements.The reverse phase termination resistor and adjustable resistor of comparator, thus can root
Compare current potential according to the required different sensitivity of detector to adjust.
Further, CO gas detectors of the invention are using MGS1100 carbon monoxide transducers as the sensitive members of CO
Part, it is good to the selectivity of CO responses, and with the features such as high sensitivity, stability is good.It is subject to temperature while signal acquisition
Compensation finally carries out real-time control and characteristic revision using MCU microcontrollers.Fireproofing detector circuit is by above-mentioned three kinds of sensor groups
At overcoming the interference of environmental factor.Multi-cycle detection can be used when microcontroller is handled, reaching regulation detection time
Number, and smoke signal and CO gas signals are detected every time, when measuring temperature also exceeds the alarm temperature upper limit, MCU hairs
Go out fire alarm signal, otherwise it is assumed that there is no fire.
Further, pir intrusion detector of the invention is by the infrared dual technology detector formed with microwave detector.Compared with
Previous microwave or infrared mono signal detector, rate of false alarm is decreased obviously, and principle signal is as shown in Figure 4.Dual technology detector work
The two kinds of signals of infrared and microwave detected are sent to microcontroller after NAND gate is handled when making, i.e., are only detected simultaneously by two
When detector output port is high level signal, autoalarm, which can just respond, steals feelings alarm signal, does not otherwise alarm.Experiment hair
It is existing, in infrared detector, it can be reduced by the change of the partitioning scheme of Fresnel Lenses and be reported by mistake caused by small pet,
To compensate for the larger weakness of microwave detector monitoring area：But infrared detector is more sensitive to the variation of environment temperature,
And microwave detector is detected only movable target, if so can't be by for interference caused by only temperature change
Autoalarm responds.Dual detection just further reduces external interference in this way, reduces alarm signal wrong report
Infrared design principle, feature and actual work with microwave detector circuit in this system is described in detail below in incidence
Process.
Further, the detecting element in thermal release electric infra-red ray pir intrusion detector is BISS0001, which is CMOS numbers
Mould mixing application-specific integrated circuit is mostly used as Red prince, it has independent high input impedance operational amplifier, can with it is more
Kind sensor matching, carries out Signal Pretreatment.In addition it also has two-way amplitude discriminator, can effectively inhibit to interfere, be internally provided with
Delay time timer and blocking time timer.
Further, the higher-order of oscillation that microwave anti-theft detector is made of metal-oxide-semiconductor field effect transistor C3355, resistance and capacitance
Circuit, circuit reflects after generating microwave signal by people or object and original signal generates frequency displacement, and small frequency shift signal is by putting
Output alarm signal after big processing.Alarm range actual measurement is 7 ~ 8m, and real-time detection can be effectively performed.Pir intrusion detector circuit is
It is made of both the above type of sensors, when carrying out signal processing inside microcontroller, two kinds of infrared and microwave will detecting
Signal carries out AND operation, i.e., when being only detected simultaneously by two sensor port signals, host, which can just be sent out, steals feelings alarm signal
Number, otherwise not in alarm.
Further, MCU microprocessors dual-tone multifrequency is compiled, the control of decoder, make house by telephone network realize with
Data exchange between relevant departments；Signal detection and control of the microprocessor to each sensor.MCU passes through interface circuit
It reads, and call signal is sent out to unit security section, 110/119 alarm station WorkPhone machine or personal beeper, report to other side
House is stolen, and structure is as shown in Figure 1.This system is in parallel with telephone set, telephone line is only occupied during alarm, alarm terminates
System is detached from telephone line afterwards, does not influence the normal use of telephone set.Report is issued by after detector detects fortuitous event
Level signal is warned to host computer control part.Host computer control part handles the level signal, then controls dual-tone multifrequency and dials
Number chip transfers to touch-tone signal (telephone number) to telephone line, and at the same time control voice chip dial-out records in advance
Voice signal to telephone line, realize audio alert, after the completion of dialing, simulate on-hook.
Further, automatic dialing alarm circuit as shown in figure 5, system use MK8870 type dtmf dialing special chips,
The chip is originally determinant key-press input chip, i.e. 4 lines and 4 alignments form 16 buttons, in practice it has proved that the chip
Not only there is determinant keyboard input function, and there is good interface capability with 51 series monolithics.As shown in Figure 3-4,
System completes the control to the chip that dials using 89C51, and wherein R8, C5 are reset element, completes electrification reset, and JT1 is used
6MHz crystal.Here control of P1 mouthfuls of the 8 lines completion to the chip that dials is used.The dial-out of telephone number is more using double-tone in circuit
Frequency dial mode.The dial-out of telephone number is the keyboard ranks input terminal R1 using control MK8870 type dtmf dialing special chips
~ R4 and C1 ~ C4 is realized.It first has to that corresponding line is made to connect a period of time with alignment, then disconnects a period of time again, this
Touch-tone signal is just sent to telephone exchange network by sample chip, realizes dialing.
Further, present invention employs speech chip APR9600 to constitute sound circuit, and the circuit is mainly by voice electricity
Road, decoder and electronic switch composition.Voice alarm circuit is as shown in Figure 6.Sound circuit APR9600 uses analog storage skill
Art, low noise are not afraid of power-off, can recording playback repeatedly.Voice messaging can divide 8 sections of storages, press key control with 8 respectively, press
Which key can which section of recording playback without influence other sections.Voice messaging in this system is divided into 2 major class:Warning information and report
Alert information, wherein early warning are divided into as temperature drift early warning and the excessive early warning of smog, and alarm is divided into fire alarm and theft alarm.In use, with
Any one section can be recorded and play at any time in family by simple button operation.When there is early warning or alarm, microcontroller passes through
P2. 2 ~ P2. 4 controls electronic switch and realizes button operation, starts corresponding recording section, releases that corresponding voice is pre-, alarm signal
Breath, and can loop play as needed, broadcasting time is voluntarily arranged by user.Divided by outside upper circuit, system also to busy tone,
Ring-back sound detecting circuit has carried out hardware design.Mainly to realize, reliably alarm designs for busy tone, ring-back sound detecting circuit.
After telephone number is transferred to, it is necessary to judge whether off-hook could send out voice to other side only in the case where confirming other side's off-hook
Information.System using the detection of busy tone and ringback tone come judge other side whether off-hook.The partial circuit is mainly by 4x4 keyboards, liquid
Crystal display and its control circuit composition.When user inputs alarm call number digital information by keyboard, circuit production
Raw keyboard interrupt signal is interrupted to microcontroller application by INTI input terminals, respective digital letter is realized in Data inputing program
It has been shown that, modification and the storage of breath.In this module, display circuit is shown with LCD liquid crystal display screen TS12232D, by TS12232D structures
At display circuit it is as shown in Figure 7.
Further, there are two types of type of alarm, i.e. fire alarm and forcible entry to alarm for intelligent fire-proofing burglary-resisting system.System
The generation of the intrusion and fire of human body is detected using sensor circuit, once there is fire, sensor detection circuit sends out signal,
It is interrupted to microcontroller application.After microcontroller response is interrupted, starts automatic dial-up circuit, difference is dialed according to the difference of type of alarm
Telephone number, send different warning messages.Telephone signal speech detection (busy tone/ringback tone/connection), system setting, mould
The work such as quasi- off-hook, dtmf signal transmitting-receiving.Software flow pattern, as shown in Figure 8.
Further, detection alarm module flow chart as figure 9, MK8870 auto dialing using it is inner should be by working method
Being set as burst mode, double-audio signal continues in this case and time out is 5lms, meets auto dialing requirement.
When setting MK8870 to burst mode, need to carry out following steps:Write control register A, it write control register B, writes
Transmitting data register, etc. to be interrupted or read states register.Subroutine flow chart dial as shown in Figure 10.First by MK8870
It is set as burst mode, then determines whether to steal feelings, is i.e. whether 7EH is set, and administrative center is dialled if it is not, jumping to
Phone number part；If be set, subscriber directory number is dialed, finally, which returns.
Further, voice subroutine flow is as shown in figure 11.P2.1 mouthfuls of microcontroller becomes low level from high level, touches
The playback foot of APR9600, playback start, because APR9600 longest record lengths are 20 seconds, after being delayed 23 seconds, microcontroller
2.1 foot of corpse becomes high level from low level, and playback terminates, subsequently into tone playing state next time, until playback terminates three times, clearly
After alert flag bit 7EH, program returns.
Further, key-press module program circuit is as shown in figure 12.Keystroke handling program is as follows：
（1）Into after keystroke handling program, according to the key assignments of user key-press, into corresponding setting operation sequence；
（2）Telephone number is arranged：Host liquid crystal display and voice prompt " telephone number setting " scan number input by user simultaneously
Number is stored, while showing " telephone number of input " on liquid crystal display, if user does not have button for a long time, terminates this
Operation returns to mistake；
（3）Recording setting：Host liquid crystal display and voice prompt " recording ", record indicator is bright, opens and records and start to count
When, timing time is shown on liquid crystal display.Timing was by 10 seconds（ISD1110）, terminate recording, record indicator extinguishes, then prolongs
When a bit of time, then play a recording just now, " beep-beep-" returns correct；
（4）Playback is arranged：Host liquid crystal display and voice prompt " playback " open playback and start timing, and timing time is shown
On liquid crystal display.Timing was by 10 seconds（ISD1110）, terminate playback, " beep-beep-" returns correct；
（5）Alarm sound is arranged：Host liquid crystal display and voice prompt " alarm sound setting " scan keyboard, if user inputs
Data time-out, returns to mistake, otherwise sets the alarm sound parameter of user setting to current alarm sound parameter.Storage is set
The parameter set, " beep-beep-" return correct；
（6）Emergency operation（Emergence button is pressed）：It shows " emergent alarm ", alarm lamp is bright；Subsequently into dial-up program.
Further, display module program circuit is as shown in figure 13.Display module programming is as follows：
（1）Type matrix is extracted using matrix withdraw software, the size of word is 16 × 16, the data of 32 bytes of a character；
（2）Character pattern data is added in display data array；
（3）An one-dimension array is built, which contains the character pattern data first character section of character in display data array
Position；
（4）A two-dimensional array is built, which is that the first place of character string to be shown is set, and the second dimension data is
The character number of character string to be shown；
（5）The character number for determining character string to be shown by the second dimension data of two-dimensional array in a program, passes through two dimension
First dimension data of array finds out the position of character data first character section to be shown as subscript, calls liquid crystal display driving
Program can show corresponding content.
The foregoing is merely the preferred embodiments of patent of the present invention, are not intended to limit the invention patent, all at this
All any modification, equivalent and improvement etc., should be included in patent of the present invention made by within the spirit and principle of patent of invention
Protection domain within.
Claims (6)
1. the invention patent relates to a kind of design of SCM Based domestic intelligent fire-proof and theft-proof alarm, the present invention devises
A kind of Domestic two fire-proof and theft-proof intelligent alarm system applied based on public telephone network, MULTISENSOR INTEGRATION, the system is with cigarette
Mist sensor, temperature sensor, far infrared sensor, microwave remote sensor and CO sensors are detecting element, with 89C51 monolithics
Machine core in order to control, a kind of automatic fire prevention anti-theft alarm system of composition, it can alarm in several ways, and by
The modern communications such as phone means are transmitted into row information, and this system various pieces can connect each other with monolithic machine host, so as to be
System can be managed concentratedly and be controlled to anti-theft alarm system.
2. a kind of design of SCM Based domestic intelligent fire-proof and theft-proof alarm according to claim 1, feature
It is, the present invention is mainly by sensor detection circuit part, main control unit circuit, dtmf dialing circuit, voice alarm circuit,
Keyboard interface circuit and display circuit, 7 parts such as busy tone, ring-back tone detection circuit composition.
3. a kind of design of SCM Based domestic intelligent fire-proof and theft-proof alarm according to claim 1, feature
It is, fireproofing detector of the invention is the composite type gunpowder being made of temperature sensing, photoelectric smoke detection and carbon monoxide detecting
Fire detector.
4. a kind of design of SCM Based domestic intelligent fire-proof and theft-proof alarm according to claim 1, feature
It is, hygrosensor of the invention uses digitaltemperaturesensorDS1820.
5. a kind of design of SCM Based domestic intelligent fire-proof and theft-proof alarm according to claim 1, feature
It is, the entire circuit of the present invention is broadly divided into infrared pulse emitting portion and receiving portion.
6. a kind of design of SCM Based domestic intelligent fire-proof and theft-proof alarm according to claim 1, feature
It is, pir intrusion detector of the invention is by the infrared dual technology detector formed with microwave detector.
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| CN201710016924.4A CN108305433A (en) | 2017-01-11 | 2017-01-11 | A kind of design of SCM Based domestic intelligent fire-proof and theft-proof alarm |
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| CN201710016924.4A CN108305433A (en) | 2017-01-11 | 2017-01-11 | A kind of design of SCM Based domestic intelligent fire-proof and theft-proof alarm |
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| CN110426069A (en) * | 2019-06-26 | 2019-11-08 | 汉威科技集团股份有限公司 | A kind of compound sense cigarette device and its automatic calibrating method |
| CN111145472A (en) * | 2020-02-24 | 2020-05-12 | 上海御渡半导体科技有限公司 | Smoke early warning protection device for integrated circuit |
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Application publication date: 20180720 |