CN110514592A - Smoke detector and its control method - Google Patents
Smoke detector and its control method Download PDFInfo
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- CN110514592A CN110514592A CN201910825706.4A CN201910825706A CN110514592A CN 110514592 A CN110514592 A CN 110514592A CN 201910825706 A CN201910825706 A CN 201910825706A CN 110514592 A CN110514592 A CN 110514592A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/117—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means by using a detection device for specific gases, e.g. combustion products, produced by the fire
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0118—Apparatus with remote processing
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Abstract
The invention discloses a kind of smoke detector and its control method, the smoke detector includes optics labyrinth, time-sequence control module, main control chip and alarm module；When ambient impurities enter optics labyrinth, reception pipe is used in optical signal after ambient impurities scatter, and is acquired the ambient-signal data of current environment and is sent to main control chip；Main control chip is also used to the control alarm module when smoke signal data are more than the first given threshold and issues alarm signal for obtaining the corresponding smoke signal data of current environment.By using the optics labyrinth structure of multi-emitting pipe and single reception pipe in the present invention, the corresponding ambient-signal data of acquisition time multi-wavelength is simultaneously sent to analysis processing in main control chip, smog and other interference impurity are distinguished, the warning sensitivity and reliability of smoke detector are effectively improved, the case where so as to avoid reporting by mistake；Signal acquisition chip and main control chip is mutually indepedent, to improve the universality of smoke detector.
Description
Technical field
The present invention relates to technical field of integrated circuits, in particular to a kind of smoke detector and its control method.
Background technique
With the rapid development of NB-IoT and LoRa (NB-IoT be technology of Internet of things with LoRa), technology of Internet of things is realized
The intelligence of security system, networking, the smoke alarm component part important as one of them, for it is intelligent, can
By property, accuracy, more stringent requirements are proposed.With the rapid development of photoelectron technology, manufacturing cost is lower and lower, in addition
Production installation is simple and convenient, therefore the occupation rate of market of optoelectronic induction smoke alarm is increasing, especially residential houses
It uses, substantially all using optoelectronic induction type smoke alarm.
For traditional infrared light electric-type smoke detector, be provided in the optics labyrinth of smoke alarm infrared emission and
It receives to pipe.In smokeless environment, since transmitting tube and reception pipe are there are certain angle, reception pipe can not receive the light letter of scattering
Number.When fire occurs, smoke particle enters optics labyrinth, and optical signal scatters, and reception pipe will receive the light of scattering
Signal, and it is converted into corresponding electric signal.Small electric signal is by amplification integral contrast and algorithm process and preset threshold
Value is compared, if it exceeds smog alarm threshold value will provide alarm signal and red light and buzzer is driven to alarm.
But existing photoelectric smoke detector is detected the limitation of mechanism by it, it is poor to the broad spectrum activity of smoke detection,
Using the interference of the scheme of the monochromatic light road cigarette sensing control coremaking piece aerosol generally existing vulnerable to dust, water vapour etc., it be easy to cause
Wrong report, therefore there is a problem of that sensitivity and reliability are lower.
Summary of the invention
Exist the technical problem to be solved by the present invention is to smoke detector in the prior art and be easy to cause wrong report, sensitivity with
The defects of reliability is lower is, and it is an object of the present invention to provide a kind of smoke detector and its control method.
The present invention is to solve above-mentioned technical problem by following technical proposals:
The present invention provides a kind of smoke detector, and the smoke detector includes optics labyrinth, signal acquisition chip
And main control chip；
The optics labyrinth, the signal acquisition chip and the main control chip are sequentially connected electrically；
The signal acquisition chip includes time-sequence control module；
The optics labyrinth includes a reception pipe and multiple transmitting tubes；
Wherein, the different transmitting tubes corresponds to different operation wavelengths；
Each transmitting tube is electrically connected with the reception pipe and the time-sequence control module respectively；
The time-sequence control module drives the different transmitting tubes successively to open work for timesharing；
The transmitting tube is used to issue the optical signal of the corresponding operation wavelength；
When ambient impurities enter the optics labyrinth, the reception pipe is used for miscellaneous by the environment in the optical signal
After matter scattering, the ambient-signal data of current environment is acquired, and by the time-sequence control module by the ambient-signal data
It is sent to the main control chip；
The main control chip is used to analyze to obtain institute according to the corresponding ambient-signal data of the difference operation wavelength
The corresponding smoke signal data of current environment are stated, and are determined whether to issue alarm signal according to the smoke signal data.
Preferably, the signal acquisition chip further includes the first driving circuit and electric current configuration module；
First driving circuit and the electricity are provided between each transmitting tube and the time-sequence control module
Stream configuration module；
The electric current configuration module is used to configure the operating current of the transmitting tube in current branch；
First driving circuit under the operating current for driving the transmitting tube to open work.
Preferably, the signal acquisition chip further include signal conversion module, filter amplification circuit, analog-to-digital conversion module and
Interface circuit；
The reception pipe successively with the signal conversion module, the filter amplification circuit, the analog-to-digital conversion module and
Interface circuit electrical connection；
The ambient-signal data that the signal conversion module is used to acquire the reception pipe is converted into telecommunications number
And it is sent to the filter amplification circuit；
The filter amplification circuit is used to be filtered enhanced processing to the electrical signal data, and by filter amplifying processing
The electrical signal data afterwards is sent to the analog-to-digital conversion module；
The analog-to-digital conversion module is used to carry out analog-to-digital conversion process to the electrical signal data, obtains digital signal number
According to；
The transmitting tube is used to the digital signal data being sent to the main control chip by the interface circuit；
The main control chip is used to obtain the corresponding cigarette of the current environment according to each digital signal data
Fog signal data.
Preferably, the smoke detector further includes alarm module；
The main control chip is electrically connected with the alarm module and the time-sequence control module respectively；
The main control chip is for judging that the smoke signal data whether more than the first given threshold, if being more than, are given birth to
The time-sequence control module is sent at a triggering command, and by the triggering command；
The time-sequence control module, which is used to control the alarm module according to the triggering command, issues alarm signal.
Preferably, the signal acquisition chip further includes booster circuit and the second driving circuit；
The booster circuit is electrically connected with the time-sequence control module and second driving circuit respectively；
Second driving circuit is electrically connected with the alarm module；
The time-sequence control module, which is used to trigger the booster circuit according to the triggering command, opens work；
The booster circuit is used to carry out the output voltage of the time-sequence control module boosting processing, obtains target electricity
Pressure；
Second driving circuit under the target voltage for driving the alarm module to issue alarm signal；
Wherein, the alarm module includes buzzer or alarm lamp.
Preferably, the signal acquisition chip further includes low-voltage detection circuit；
The low-voltage detection circuit is electrically connected with the time-sequence control module；
The low-voltage detection circuit is used for when the output voltage of the time-sequence control module is lower than the second given threshold,
Determine that the smoke detector is in low voltage operating state.
Preferably, the main control chip is for obtaining the corresponding first environment signal data of the shortest operation wavelength；
The main control chip is also used to calculate the first environment signal data corresponding with operation wavelength described in other
The set of each intersection between two ambient-signal datas obtains third ambient-signal data；
By the ambient-signal data in the first environment signal data in addition to the third ambient-signal data
As the corresponding smoke signal data of the current environment.
Preferably, the smoke signal data corresponding for the same operation wavelength, the main control chip are used for root
Data climbing speed is calculated according to the corresponding smoke signal data of different time points；
If the data climbing speed is less than third given threshold, it is determined that the corresponding culinary art cigarette of the smoke signal data
Mist；Otherwise, it determines the smog that the corresponding burning polyurethane of the smoke signal data generates.
Preferably, the transmitting tube include infrared light emission pipe, blue emission pipe, phase co-wavelength forward emitted pipe or after
To transmitting tube.
The present invention also provides a kind of control method of smoke detector, the control method uses above-mentioned smoke detection
Device realizes that the control method includes:
S1. when ambient impurities enter the optics labyrinth, the reception pipe is miscellaneous by the environment in the optical signal
After matter scattering, the ambient-signal data of current environment is acquired, and by the time-sequence control module by the ambient-signal data
It is sent to the main control chip；
S2. the main control chip is analyzed to obtain described according to the corresponding ambient-signal data of the difference operation wavelength
The corresponding smoke signal data of current environment, and determined whether to issue alarm signal according to the smoke signal data.
Preferably, step S2 includes:
The main control chip obtains the corresponding first environment signal data of the shortest operation wavelength；
The main control chip calculates first environment signal data second environment corresponding with operation wavelength described in other
The set of each intersection between signal data obtains third ambient-signal data；
By the ambient-signal data in the first environment signal data in addition to the third ambient-signal data
As the corresponding smoke signal data of the current environment.
Preferably, the smoke signal data corresponding for the same operation wavelength, the control method further include:
Data climbing speed is calculated according to the corresponding smoke signal data of different time points in the main control chip；
If the data climbing speed is less than third given threshold, it is determined that the corresponding culinary art cigarette of the smoke signal data
Mist；Otherwise, it determines the smog that the corresponding burning polyurethane of the smoke signal data generates.
The positive effect of the present invention is that:
In the present invention, by using the optics labyrinth structure of multi-emitting pipe and single reception pipe, acquisition time multi-wavelength is corresponding
Ambient-signal data and be sent in main control chip analysis and handle, realize that (such as dust, water steam by smog and other interference impurity
Vapour etc.) distinguish, it is ensured that only fire hazard aerosol fog is responded, effectively improve smoke detector warning sensitivity and can
By property, the case where so as to avoid reporting by mistake；The modules for realizing signal acquisition and circuit integration setting are being believed simultaneously
It is mutually indepedent with main control chip in number acquisition chip, to improve the universality of smoke detector.
Detailed description of the invention
Fig. 1 is the module diagram of the smoke detector of the embodiment of the present invention 1.
Fig. 2 is the module diagram of the smoke detector of the embodiment of the present invention 2.
Fig. 3 is the flow chart of the control method of the smoke detector of the embodiment of the present invention 3.
Fig. 4 is the flow chart of the control method of the smoke detector of the embodiment of the present invention 4.
Specific embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.
Embodiment 1
As shown in Figure 1, the smoke detector of the present embodiment includes optics labyrinth 1, signal acquisition chip 2 and main control chip
3。
Optics labyrinth 1, signal acquisition chip 2 and main control chip 3 are sequentially connected electrically.
Signal acquisition chip 2 includes time-sequence control module 4.
Optics labyrinth 1 includes a reception pipe 5 and multiple transmitting tubes 6.
Wherein, different transmitting tubes corresponds to different operation wavelengths；
Specifically, transmitting tube 6 include infrared light emission pipe, blue emission pipe, phase co-wavelength forward emitted pipe or backward
Transmitting tube etc..
Each transmitting tube 6 is electrically connected with reception pipe 5 and time-sequence control module 4 respectively；
Time-sequence control module 4 drives different transmitting tubes 6 successively to open work for timesharing；
Transmitting tube 6 is used to issue the optical signal of corresponding operation wavelength；
When ambient impurities enter optics labyrinth 1, reception pipe 5 is used for the acquisition in optical signal after ambient impurities scatter
The ambient-signal data of current environment, and it is sent to time-sequence control module 4；
Time-sequence control module 4 is used to ambient-signal data being sent to main control chip 3；
Main control chip 3 is used to be analyzed according to the corresponding ambient-signal data of different operating wavelength to obtain current environment corresponding
Smoke signal data, and determined whether to issue alarm signal according to smoke signal data.
Main control chip adjusts sensitive alarm according to ambient-signal data and actual demand flexible configuration algorithm in the present embodiment
Degree, to meet different international smog alarm standards, improves the universality and flexibility of smoke detector.
In addition, also proposed to smoke alarm intelligentized due to the development of technology of Internet of things and intelligent fire technology
Demand.It is general in the design of intelligent cigarette sense product all to configure wireless communication module, the information of smoke alarm can be captured in real time
And state, and wireless communication module generally all contains MCU (microcontroller).When by the smoke detector application of the present embodiment
It, can be right directly using the MCU of wireless communication module as the main control chip in smoke detector when in intelligent cigarette sense product
The identification of smog and interference signal in current environment, to realize reasonable distribution system resource.
In the present embodiment, by using the optics labyrinth structure of multi-emitting pipe and single reception pipe, acquisition time multi-wavelength pair
The ambient-signal data answered simultaneously is sent to analysis in main control chip and handles, and realizes smog and other interference impurity (such as dusts, water
Steam etc.) distinguish, it is ensured that only fire hazard aerosol fog is responded, effectively improve smoke detector warning sensitivity and
Reliability, the case where so as to avoid reporting by mistake；The modules for realizing signal acquisition and circuit integration setting are existed simultaneously
It is mutually indepedent with main control chip in signal acquisition chip, to improve the universality of smoke detector.
Embodiment 2
As shown in Fig. 2, the smoke detector of the present embodiment is the further improvement to embodiment 1, specifically:
Main control chip 3 is for obtaining the corresponding first environment signal data of shortest operation wavelength；
Main control chip 3 is also used to calculate first environment signal data second environment signal number corresponding with other operation wavelengths
The set of each intersection between obtains third ambient-signal data；
Using the ambient-signal data in first environment signal data in addition to third ambient-signal data as current environment
Corresponding smoke signal data.
Specifically, smoke signal data corresponding for same operation wavelength, main control chip 3 are used for according to different time points
Data climbing speed is calculated in corresponding smoke signal data；
If data climbing speed is less than third given threshold, it is determined that the corresponding culinary art smog of smoke signal data；Otherwise, really
Determine the smog that the corresponding burning polyurethane of smoke signal data generates, i.e., to reasonable smog (culinary art smog) and non-reasonable smog (fire
Calamity smog) effectively distinguished, improve the service performance of smoke alarm unit.
Furthermore it is also possible to calculate the ratio of the corresponding smoke signal data of two different operating wavelength, smog is obtained whole
Accounting in a ambient impurities.
Specifically, such as one is infrared light, and one is blue light, and shorter by the wavelength of blue light, size particles have blue light
The wavelength of stronger scattering, infrared light is longer, and little particle is weaker to the scattering of feux rouges, and bulky grain has stronger dissipate to infrared light
It penetrates.Corresponding ambient-signal data after the scattering of blue light and infrared light, which is subtracted each other, can reject the biggish ash of particle in present air
The signal data of the generations such as dirt, vapor only retains the signal data that the lesser smog of particle generates, to realize to smog
Accurate measurement.
The ratio that the corresponding ambient-signal data of infrared light ambient-signal data corresponding with blue light can also be calculated, if small
Then illustrate there was only seldom dust, vapor etc. in present air in setting value, the overwhelming majority is all smog.
Wherein, main control chip 3 is handled ambient-signal data using which kind of algorithm and is determined according to actual needs.
The smoke detector of the present embodiment further includes alarm module 7；
Wherein, alarm module includes but is not limited to buzzer, alarm lamp.
Main control chip 3 is electrically connected with alarm module 7 and time-sequence control module 4 respectively；
Main control chip 3, if being more than, generates a triggering for whether judging smoke signal data more than the first given threshold
Instruction, and triggering command is sent to time-sequence control module 4；
Time-sequence control module 4, which is used to control alarm module 7 according to triggering command, issues alarm signal.
Signal acquisition chip 2 further includes the first driving circuit 8, electric current configuration module 9, signal conversion module 10, filters and put
Big circuit 11, analog-to-digital conversion module 12, interface circuit 13, booster circuit 14, the second driving circuit 15 and low-voltage detection circuit
16。
The first driving circuit 8 and electric current configuration module 9 are provided between each transmitting tube 6 and time-sequence control module 4；
Electric current configuration module 9 is used to configure the operating current of the transmitting tube in current branch；
First driving circuit 8 is used to drive transmitting tube to open work under operating current.
Reception pipe 5 successively with signal conversion module 10, filter amplification circuit 11, analog-to-digital conversion module 12 and interface circuit 13
Electrical connection；
Signal conversion module 10 is used to for the ambient-signal data that reception pipe acquires being converted into telecommunications number and sends to filter
Wave amplifying circuit；
Filter amplification circuit 11 is used to be filtered enhanced processing to electrical signal data, and by the electricity after filter amplifying processing
Signal data is sent to analog-to-digital conversion module；
Analog-to-digital conversion module 12 is used to carry out analog-to-digital conversion process to electrical signal data, obtains digital signal data；
Transmitting tube 6 is used to digital signal data being sent to main control chip by interface circuit 13；
Wherein, digital signal data can or asynchronous transmission synchronous by interface circuit 12 to controlling chip.Interface electricity
Road 12 can use a kind of interface of forms such as UART, GPIO, USB, CAN (UART, GPIO, USB, CAN are interface), such as
RS232, RS485, SPI, IIC etc. can specifically carry out diversified selection according to the demand of main control chip.
Main control chip 3 is used to obtain the corresponding smoke signal data of current environment according to each digital signal data.
When alarm module 7 is buzzer, booster circuit 14 is electric with time-sequence control module 4 and the second driving circuit 15 respectively
Connection；
Second driving circuit 15 is electrically connected with alarm module 7；
Time-sequence control module 4, which is used to trigger booster circuit 14 according to triggering command, opens work；
Booster circuit 14 is used to carry out the output voltage of time-sequence control module 4 boosting processing, obtains target voltage；
Second driving circuit 15 is used to drive alarm module 7 to issue alarm signal under target voltage.
Low-voltage detection circuit 16 is electrically connected with time-sequence control module 4；
Low-voltage detection circuit 16 is used to determine when the output voltage of time-sequence control module 4 is lower than the second given threshold
Smoke detector is in low voltage operating state.
In addition, the smoke detector of the present embodiment further includes electrification reset circuit, I/O circuit and memory circuit.It powers on
Reset circuit is for realizing the power-on reset function to smoke detector；I/O circuit is electrically connected with main control chip and alarm lamp
It connects, I/O circuit controls alarm lamp according to main control chip and opens work；Memory circuit exists for storing smoke detector
The various data generated in the course of work.
It is illustrated below with reference to example:
For the intelligent smoke detector system based on NB-IoT module, optics labyrinth includes three transmitting tubes and a reception pipe,
To infrared transmitting tube, backward infrared transmitting tube and blue emission pipe before wherein three transmitting tubes are respectively.Pass through single reception pipe point
When collect the corresponding ambient-signal data of three optical paths, and be sent to the MCU built in NB-IoT (i.e. main control chip), according to
The international standard of smog alarm response, using corresponding algorithm, such as by forward direction in the corresponding ambient-signal data of blue emission pipe
Infrared transmitting tube, the corresponding ambient-signal data of backward infrared transmitting tube are rejected, and smoke signal data are acquired；And
The smoke signal data then trigger buzzer when reaching setting condition and alarm lamp opens work, to eliminate bulky grain cigarette
The influence of dirt, vapor and other interference signals avoids wrong report.
In the present embodiment, by using the optics labyrinth structure of multi-emitting pipe and single reception pipe, acquisition time multi-wavelength pair
The ambient-signal data answered simultaneously is sent to analysis in main control chip and handles, and realizes smog and other interference impurity (such as dusts, water
Steam etc.) distinguish, it is ensured that only fire hazard aerosol fog is responded, effectively improve smoke detector warning sensitivity and
Reliability, the case where so as to avoid reporting by mistake；The modules for realizing signal acquisition and circuit integration setting are existed simultaneously
It is mutually indepedent with main control chip in signal acquisition chip, to improve the universality of smoke detector.
Embodiment 3
The control method of the smoke detector of the present embodiment is using the cigarette in any one embodiment in embodiment 1 or 2
Mist detection device is realized.
As shown in figure 3, the control method of the smoke detector of the present embodiment includes:
S101, when ambient impurities enter optics labyrinth, reception pipe in optical signal after ambient impurities scatter, work as by acquisition
The ambient-signal data of preceding environment, and ambient-signal data is sent to by main control chip by time-sequence control module；
S102, main control chip are analyzed to obtain current environment corresponding according to the corresponding ambient-signal data of different operating wavelength
Smoke signal data, and determined whether to issue alarm signal according to smoke signal data.
In the present embodiment, passes through the corresponding ambient-signal data of acquisition time multi-wavelength and be sent in main control chip and analyze
Processing is realized and distinguishes smog and other interference impurity (such as dust, water vapour), it is ensured that only rings to fire hazard aerosol fog
It answers, effectively improves the warning sensitivity and reliability of smoke detector, the case where so as to avoid reporting by mistake.
Embodiment 4
As shown in figure 4, the control method of the smoke detector of the present embodiment is the further improvement to embodiment 3, tool
Body:
Step S102 includes:
S1021, main control chip obtain the corresponding first environment signal data of shortest operation wavelength；
S1022, main control chip calculate first environment signal data second environment signal number corresponding with other operation wavelengths
The set of each intersection between obtains third ambient-signal data；
S1023, using the ambient-signal data in first environment signal data in addition to third ambient-signal data as working as
The corresponding smoke signal data of preceding environment.
Specifically, smoke signal data corresponding for same operation wavelength, control method further include:
Data climbing speed is calculated according to the corresponding smoke signal data of different time points in main control chip；
If data climbing speed is less than third given threshold, it is determined that the corresponding culinary art smog of smoke signal data；Otherwise, really
Determine the smog that the corresponding burning polyurethane of smoke signal data generates, i.e., to reasonable smog (culinary art smog) and non-reasonable smog (fire
Calamity smog) effectively distinguished, improve the service performance of smoke alarm unit.
Furthermore it is also possible to calculate the ratio of the corresponding smoke signal data of two different operating wavelength, smog is obtained whole
Accounting in a ambient impurities.
Specifically, such as one is infrared light, and one is blue light, and shorter by the wavelength of blue light, size particles have blue light
The wavelength of stronger scattering, infrared light is longer, and little particle is weaker to the scattering of feux rouges, and bulky grain has stronger dissipate to infrared light
It penetrates.Corresponding ambient-signal data after the scattering of blue light and infrared light, which is subtracted each other, can reject the biggish ash of particle in present air
The signal data of the generations such as dirt, vapor only retains the signal data that the lesser smog of particle generates, to realize to smog
Accurate measurement.
The ratio that the corresponding ambient-signal data of infrared light ambient-signal data corresponding with blue light can also be calculated, if small
Then illustrate there was only seldom dust, vapor etc. in present air in setting value, the overwhelming majority is all smog.
In the present embodiment, passes through the corresponding ambient-signal data of acquisition time multi-wavelength and be sent in main control chip and analyze
Processing is realized and distinguishes smog and other interference impurity (such as dust, water vapour), it is ensured that only rings to fire hazard aerosol fog
It answers, effectively improves the warning sensitivity and reliability of smoke detector, the case where so as to avoid reporting by mistake.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that this is only
For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from
Under the premise of the principle and substance of the present invention, many changes and modifications may be made, but these change and
Modification each falls within protection scope of the present invention.
Claims (12)
1. a kind of smoke detector, which is characterized in that the smoke detector include optics labyrinth, signal acquisition chip and
Main control chip；
The optics labyrinth, the signal acquisition chip and the main control chip are sequentially connected electrically；
The signal acquisition chip includes time-sequence control module；
The optics labyrinth includes a reception pipe and multiple transmitting tubes；
Wherein, the different transmitting tubes corresponds to different operation wavelengths；
Each transmitting tube is electrically connected with the reception pipe and the time-sequence control module respectively；
The time-sequence control module drives the different transmitting tubes successively to open work for timesharing；
The transmitting tube is used to issue the optical signal of the corresponding operation wavelength；
When ambient impurities enter the optics labyrinth, the reception pipe is used to dissipate in the optical signal by the ambient impurities
After penetrating, the ambient-signal data of current environment is acquired, and the ambient-signal data is sent by the time-sequence control module
To the main control chip；
The main control chip is used to analyze to obtain described work as according to the corresponding ambient-signal data of the difference operation wavelength
The corresponding smoke signal data of preceding environment, and determined whether to issue alarm signal according to the smoke signal data.
2. smoke detector as described in claim 1, which is characterized in that the signal acquisition chip further includes the first driving
Circuit and electric current configuration module；
It is provided with first driving circuit between each transmitting tube and the time-sequence control module and the electric current is matched
Set module；
The electric current configuration module is used to configure the operating current of the transmitting tube in current branch；
First driving circuit under the operating current for driving the transmitting tube to open work.
3. smoke detector as described in claim 1, which is characterized in that the signal acquisition chip further includes signal conversion
Module, filter amplification circuit, analog-to-digital conversion module and interface circuit；
The reception pipe successively with the signal conversion module, the filter amplification circuit, the analog-to-digital conversion module and interface
Circuit electrical connection；
It is concurrent that the ambient-signal data that the signal conversion module is used to acquire the reception pipe is converted into telecommunications number
It send to the filter amplification circuit；
The filter amplification circuit is used to be filtered enhanced processing to the electrical signal data, and will be after filter amplifying processing
The electrical signal data is sent to the analog-to-digital conversion module；
The analog-to-digital conversion module is used to carry out analog-to-digital conversion process to the electrical signal data, obtains digital signal data；
The transmitting tube is used to the digital signal data being sent to the main control chip by the interface circuit；
The main control chip, which is used to obtain the corresponding smog of the current environment according to each digital signal data, to be believed
Number.
4. smoke detector as described in claim 1, which is characterized in that the smoke detector further includes alarm mould
Block；
The main control chip is electrically connected with the alarm module and the time-sequence control module respectively；
The main control chip is for judging that the smoke signal data whether more than the first given threshold, if being more than, generate one
Triggering command, and the triggering command is sent to the time-sequence control module；
The time-sequence control module, which is used to control the alarm module according to the triggering command, issues alarm signal.
5. smoke detector as claimed in claim 4, which is characterized in that the signal acquisition chip further includes booster circuit
With the second driving circuit；
The booster circuit is electrically connected with the time-sequence control module and second driving circuit respectively；
Second driving circuit is electrically connected with the alarm module；
The time-sequence control module, which is used to trigger the booster circuit according to the triggering command, opens work；
The booster circuit is used to carry out the output voltage of the time-sequence control module boosting processing, obtains target voltage；
Second driving circuit under the target voltage for driving the alarm module to issue alarm signal；
Wherein, the alarm module includes buzzer or alarm lamp.
6. smoke detector as described in claim 1, which is characterized in that the signal acquisition chip further includes that low-voltage is visited
Slowdown monitoring circuit；
The low-voltage detection circuit is electrically connected with the time-sequence control module；
The low-voltage detection circuit is used to determine when the output voltage of the time-sequence control module is lower than the second given threshold
The smoke detector is in low voltage operating state.
7. smoke detector as described in claim 1, which is characterized in that the main control chip is shortest described for obtaining
The corresponding first environment signal data of operation wavelength；
The main control chip is also used to calculate the first environment signal data the second ring corresponding with operation wavelength described in other
The set of each intersection between the signal data of border obtains third ambient-signal data；
Using the ambient-signal data in the first environment signal data in addition to the third ambient-signal data as
The corresponding smoke signal data of the current environment.
8. smoke detector as claimed in claim 7, which is characterized in that corresponding for the same operation wavelength described
Smoke signal data, the main control chip are used to that data to be calculated according to the corresponding smoke signal data of different time points
Climbing speed；
If the data climbing speed is less than third given threshold, it is determined that the corresponding culinary art smog of the smoke signal data；It is no
Then, the smog that the corresponding burning polyurethane of the smoke signal data generates is determined.
9. smoke detector as described in claim 1, which is characterized in that the transmitting tube includes infrared light emission pipe, indigo plant
The forward emitted pipe or firing backward pipe of light-emitting tube, phase co-wavelength.
10. a kind of control method of smoke detector, which is characterized in that the control method is using described in claim 1
Smoke detector realizes that the control method includes:
S1. when ambient impurities enter the optics labyrinth, the reception pipe is dissipated in the optical signal by the ambient impurities
After penetrating, the ambient-signal data of current environment is acquired, and the ambient-signal data is sent by the time-sequence control module
To the main control chip；
S2. the main control chip is analyzed to obtain described current according to the corresponding ambient-signal data of the difference operation wavelength
The corresponding smoke signal data of environment, and determined whether to issue alarm signal according to the smoke signal data.
11. the control method of smoke detector as claimed in claim 10, which is characterized in that step S2 includes:
The main control chip obtains the corresponding first environment signal data of the shortest operation wavelength；
The main control chip calculates first environment signal data second environment signal corresponding with operation wavelength described in other
The set of each intersection between data obtains third ambient-signal data；
Using the ambient-signal data in the first environment signal data in addition to the third ambient-signal data as
The corresponding smoke signal data of the current environment.
12. the control method of smoke detector as claimed in claim 11, which is characterized in that for the same operating wave
The long corresponding smoke signal data, the control method further include:
Data climbing speed is calculated according to the corresponding smoke signal data of different time points in the main control chip；
If the data climbing speed is less than third given threshold, it is determined that the corresponding culinary art smog of the smoke signal data；It is no
Then, the smog that the corresponding burning polyurethane of the smoke signal data generates is determined.
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