CN109712367A - Smoke detector and smoke detection method - Google Patents
Smoke detector and smoke detection method Download PDFInfo
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- CN109712367A CN109712367A CN201910126962.4A CN201910126962A CN109712367A CN 109712367 A CN109712367 A CN 109712367A CN 201910126962 A CN201910126962 A CN 201910126962A CN 109712367 A CN109712367 A CN 109712367A
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Abstract
The invention discloses a kind of smoke detectors, comprising: ontology has detecting chamber in the ontology；First transmitting tube and the second transmitting tube are arranged in the ontology, and are configured to that the first light and the second light can be emitted into the detecting chamber respectively；Reception pipe, first light and the second light can be incident on the reception pipe after refraction and/or scattering, and the reception pipe generates output according to the intensity of incident light；Control device, the control device is coupled with the reception pipe, receive the first output that first light generates in the reception pipe and the second output that second light generates in the reception pipe, and be configured to the difference exported based on first output and second, ratio or combinations thereof, judge whether there is fire.
Description
Technical field
The present invention relates to a kind of smoke detection technical field more particularly to a kind of smog spies using more than two transmitting tubes
Survey device and smoke detection method
Background technique
Fire be it is out of hand after spread a kind of seriousness combustion phenomena, be occur in various disasters it is most frequent and great
One of destructive disaster, smog are one of early stage main fire products, are often detected using smog as parameter to fire, main
Pay close attention to three basic parameters of smog: concentration, average grain diameter and dimensional analysis, wherein smokescope has directly reacted smoke
Size, visibility reduce situation and smog injury degree.
Optical detector of fire smoke is that the smog generated when utilizing on fire can change this fundamental property of the propagation characteristic of light
And it develops.When smoke density reaches a certain level, optical detector of fire smoke issues alarm signal.Using photo-electric fire detection skill
Art detects smog, and the optical scattering strength model of smoke particle is established using Miller scattering principle, has measured cigarette
Total scattering (absorb and scatter) of the fog particles to different wave length incident light.Determine the calculating of the Miller scattering parameter of scattering strength
Formula are as follows: q=4 π d λ -1sin (θ/2), scattered light intensity is directly proportional to particle diameter d, is inversely proportional with lambda1-wavelength.
Different materials are different in the smog that fire process (be pyrolyzed, glow) generates.Fire early stage be easy to generate small amount compared with
The suspended particulate for being condensed into bigger, translucent sphere can be aged in big particle, these particles.It is generated under non-Fire Conditions
Smoke particle, such as: dust, vapor are non-pyrolytic produced by the natural materials in environment, the smoke particle generated with fire
It compares, these particles are generally bigger than normal.Fire is determined because traditional technology is characterized based on amounts of particles, is being detected using single light source
Luminous intensity is detected in region to judge, fire hazard aerosol fog and non-fire hazard aerosol fog type, existing smoke detector rate of false alarm cannot be distinguished
Higher, the multiple false alarm of alarm, people generate bad psychological shade, so that people produce when fire really occurs
Slack psychology, very big influence is caused to people's lives.
Method of the existing detector mostly based on single smokescope can not solve low wrong report, wide spectrum smog partial size responds, is black
The uniform response of white cigarette, the problems such as sensitivity is adjustable.
Fire hazard aerosol fog with from non-fire hazard aerosol fog (vapor/dust etc.) have different Size Distributions.Utilize cigarette
Mist particle size diameter has this property of scattering strength difference to different lambda1-wavelengths, solves existing single smoke density fire judgement
The problem of, distinguish fire hazard aerosol fog and non-fire hazard aerosol fog.Meanwhile having using the smoke particle of different colours to different angle incident light
There is this property of absorption difference, solves the problems, such as the uniform response of black and white cigarette.
The content of background technology part is only the technology that inventor is known, not the existing skill of natural representative this field
Art.
Summary of the invention
In view of one or more of the defect of the prior art, the present invention proposes a kind of smoke detector, comprising: this
Body has detecting chamber in the ontology；First transmitting tube and the second transmitting tube are arranged in the ontology, and are configured to divide
Do not emit the first light and the second light into the detecting chamber；Reception pipe, first light and the second light through refraction and/
Or after scattering, it can be incident on the reception pipe, the reception pipe generates output according to the intensity of incident light；Control device, it is described
Control device is coupled with the reception pipe, receives the first output that first light generates in the reception pipe and described
The second output that second light generates in the reception pipe, and it is configured to the difference based on first output and the second output
Value, ratio or combinations thereof, judge whether there is fire.
According to an aspect of the present invention, the smoke detector further includes warning device, the warning device and institute
State control device coupling, and when control device judgement is there are when fire, the warning device is triggered alarm.
According to an aspect of the present invention, the one group of light source of multiple wavelength is packaged in first transmitting tube, it is described
Second group of light source of multiple wavelength is packaged in second transmitting tube, the control device is configured to based on the one group of light source
The light of multiple wavelength of multiple first outputs and the one group of light source that the light of multiple wavelength generates in the reception pipe
Multiple second outputs generated in the reception pipe, judge whether there is fire, wherein preferably sealing in first transmitting tube
The LED there are three different wave length is filled, there are three the LED of different wave length for preferred package in second transmitting tube.
According to an aspect of the present invention, first transmitting tube is infrared transmitting tube, and second transmitting tube is blue light
Transmitting tube.
According to an aspect of the present invention, the control device is configured in the following manner to control first transmitting
It pipe and the second transmitting tube and judges whether there is fire: lighting the first transmitting tube, emit the first light, acquire the reception pipe
The first output based on first light；The second transmitting tube is lighted, the second light is emitted, acquires the reception pipe based on described
Second output of the second light；Judge whether first output is more than first threshold；If it does, there are fire for judgement；It is no
Then, judge whether the first output is more than second threshold, if be less than, fire is not present in judgement.
According to an aspect of the present invention, the control device is configured to: if the first output is more than second threshold, judgement
Whether the second output is more than third threshold value, if it does, then there are fire for judgement, otherwise, judges the first output and the second output
Whether Fire Mode in database is met, if met, there are fire for judgement, wherein the first transmitting tube lighting time
For 70~90us, preferably 80us, the second transmitting tube lighting time is 70~90us, preferably 80us.
According to an aspect of the present invention, first transmitting tube and the angle of the reception pipe in a horizontal plane are at 121 °
~147 °, second transmitting tube and the angle of the reception pipe in a horizontal plane are at 60 °~91 °.
The present invention also provides a kind of smoke detection methods, comprising: lights the first transmitting tube, emits the first light, through smog
After refraction and/or scattering, it is incident in reception pipe and generates the first output；The second transmitting tube is lighted, emits the second light, through smog
After refraction and/or scattering, it is incident in reception pipe and generates the second output；Based on first output and second output
Difference, ratio or combinations thereof, judge whether there is fire.
According to an aspect of the present invention, the smoke detection method further include: when judgement is there are when fire, triggering is reported
It is alert.
According to an aspect of the present invention, the one group of light source of multiple wavelength is packaged in first transmitting tube, it is described
The step of being packaged with second group of light source of multiple wavelength in second transmitting tube, judging whether there is fire includes: based on described
The light of multiple wavelength of one group of light source generated in the reception pipe it is multiple first output and the one group of light source it is more
Multiple second outputs that the light of a wavelength generates in the reception pipe, judge whether there is fire, wherein first transmitting
There are three the LED of different wave length for preferred package in pipe, and there are three the LED of different wave length for preferred package in second transmitting tube.
According to an aspect of the present invention, described the step of judging whether there is fire includes: to judge first output
It whether is more than first threshold；If it does, there are fire for judgement；Otherwise, judge whether the first output is more than second threshold, if
It is less than, then fire is not present in judgement, if the first output is more than second threshold, judges whether the second output is more than third threshold
Otherwise value, judges whether the first output meets the fire in database with the second output if it does, then there are fire for judgement
Mode, if met, there are fire for judgement, wherein the first transmitting tube lighting time is 70~90us, preferably 80us, institute
Stating for the second transmitting tube lighting time is 70~90us, preferably 80us.
According to an aspect of the present invention, the smoke detection method is executed by smoke detector as described above.
Embodiment through the invention can be more precisely carried out smoke detection and alarm, solve existing detector
Method mostly based on single smokescope, can not solve it is low wrong report, wide spectrum smog partial size response, black and white cigarette it is uniform response, it is sensitive
Spend the problems such as adjustable.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows smoke detector according to an embodiment of the invention；
Fig. 2 shows a preferred embodiments of the first transmitting tube；
Fig. 3 shows the schematic diagram of LED chip according to an embodiment of the invention；
Fig. 4 shows smoke detection method in accordance with a preferred embodiment of the present invention；With
Fig. 5 shows the smoke detection method of another preferred embodiment according to the present invention.
Specific embodiment
Hereinafter, certain exemplary embodiments are simply just described.As one skilled in the art will recognize that
Like that, without departing from the spirit or scope of the present invention, described embodiment can be modified by various different modes.
Therefore, attached drawing and description are considered essentially illustrative rather than restrictive.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " go up ", " under ", " preceding ", " afterwards ", " left side ", " right side ", " heavily fortified point, and directly ", " level ", " top ", " bottom ", " is interior ", " outside ", "
Clockwise ", " counterclockwise " wait the orientation or positional relationship of instructions to be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second " are only
For descriptive purposes, it is not understood to indicate or imply relative importance or implicitly indicates the number of indicated technical characteristic
Amount." first " is defined as a result, the feature of " second " can explicitly or implicitly include one or more spy
Sign.In the description of the present invention, " multiple " are meant that two or more, unless otherwise specifically defined.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected: can
To be mechanical connection, it is also possible to be electrically connected or can mutually communicate；It can be directly connected, it can also be by between intermediary
It connects connected, can be the connection inside two elements or the interaction relationship of two elements.For the ordinary skill of this field
For personnel, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature its " upper " or it " under "
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " include first spy
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and it is " following " including fisrt feature right above second feature and oblique upper, or be merely representative of
First feature horizontal height is less than second feature.
Following disclosure provides many different embodiments or example is used to realize different structure of the invention.In order to
Simplify disclosure of the invention, hereinafter the component of specific examples and setting are described.Certainly, they are merely examples, and
And it is not intended to limit the present invention.In addition, the present invention can in different examples repeat reference numerals and/or reference letter,
This repetition is for purposes of simplicity and clarity, itself not indicate between discussed various embodiments and/or setting
Relationship.In addition, the present invention provides various specific techniques and material example, but those of ordinary skill in the art can be with
Recognize the application of other techniques and/or the use of other materials.
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Fig. 1 shows smoke detector 100 according to an embodiment of the invention.As shown in Figure 1, smoke detector 100
Including ontology 101, the first transmitting tube 103, the second transmitting tube 104, reception pipe 105 and control device 106.Have in ontology 101
There is detecting chamber 102.Detecting chamber 102 or make darkroom or sense cigarette labyrinth, that is, allows external smog to enter wherein, and can block
External ambient light prevents the interference of external environmental light so that internal become darkroom.102 inside of detecting chamber is settable simultaneously
There is zigzag design, is used to effectively absorb bias light.
First transmitting tube 103 and the second transmitting tube 104 may be located in ontology 101, and being configured to can be respectively to spy
It surveys in room 102 and emits the first light and the second light.First light and the second light pass through the folding of smoke particle in detecting chamber
After penetrating and/or scattering, it can be incident on reception pipe 105, the reception pipe 105 generates output according to the intensity of incident light, so as to
To know the concentration or other information of smoke particle according to output.Reception pipe 105 is, for example, photodiode.Photodiode
Electric current or voltage signal can be converted optical signals into, tube core is non-to the variation of light using a PN junction with photosensitive feature
It is often sensitive, there is unilateral conduction, and for electrology characteristic can be changed when light intensity difference, it can be smoothly strong and weak with illumination
To change the electric current in circuit.When thering is smoke particle to block photodiode to receive illumination, there is the saturation current of very little and anti-
It is generated to leakage current, photodiode ends at this time；When not having smoke particle to block photodiode, photodiode is received
To illumination, it is saturated reverse leakage current and greatly increases, form photoelectric current, then change with the variation of incident intensity, so as to
To judge the size of smoke particle diameter according to the size of electric current.It will be appreciated by those skilled in the art that reception pipe 105 is defeated
It can reflect the concentration of smog out, details are not described herein again.
Control device 106 is communicatively coupled with reception pipe 105, receives what first light generated in the reception pipe
The second output that first output and second light generate in the reception pipe, and be configured to based on first output
Difference, ratio or combinations thereof with the second output, judge whether there is fire.In Fig. 1 for the sake of clarity, by control device
106 show except the ontology 101 of smoke detector 100, it is understood by one of ordinary skill in the art that control device 106 can
To be integrated into the ontology of smoke detector 100, an individual unit or a control device 106 also can be set into
It can be communicated simultaneously with multiple smoke detectors 100, and acquire the output of reception pipe, carry out smoke detection and fire report
Alert, these are within.Control device can realize by way of software, hardware or combination thereof, example
It such as can be single-chip microcontroller, microprocessor, microcontroller, digital signal processor, specific integrated circuit (ASIC), field-programmable
Gate array (FPGA) etc. or other integrated formats realize that these are within.
Control device 106 can also be coupled with the first transmitting tube 103 and the second transmitting tube 104, thus the first transmitting of control
Pipe 103 and the second transmitting tube 104 shine, light fluorescent lifetime and timing.
According to a preferred embodiment of the present invention, smoke detector 100 further includes warning device (not shown).The report
Alarm device is coupled with control device 106, and when control device judgement is there are when fire, and the warning device is triggered report
It is alert.Warning device such as buzzer, flash lamp or alarm information is issued the user on a graphical user interface.
Preferably, the first transmitting tube 103 and the second transmitting tube 104 are the transmitting tube of different wave length, such as the first transmitting tube
103 be infrared transmitting tube, and second transmitting tube 104 is blue emission pipe.
In accordance with a preferred embodiment of the present invention, the one group of light source of multiple wavelength is packaged in the first transmitting tube 103, the
Second group of light source of multiple wavelength is packaged in two transmitting tubes 104, the control device 106 is configured to based on first group of light
Multiple wavelength of multiple first outputs and the one group of light source that the light of multiple wavelength in source generates in the reception pipe
Light generated in the reception pipe it is multiple second output, judge whether there is fire.Fig. 2 shows the first transmitting tubes 103
A preferred embodiment, wherein in first transmitting tube 103 encapsulate there are three different wave length LED.
As shown in Fig. 2, the first transmitting tube 103 includes reflector 1033, reflector 1033 is for reflecting the hair of LED chip 1032
To reception pipe, LED chip 1032 is arranged in 1033 inside of reflector and draws the P of LED chip 2 by gold thread 1034 light out
Knot, LED chip 1032 N knot couple with reflector 1033, the lower end of the first transmitting tube 103 set there are two for wiring terminal
1035, the terminal 1035 of wiring can be connected with power supply and switch, realize LED chip for power-off.
Fig. 3 shows the schematic diagram of LED chip 1032.As shown in figure 3, LED chip 1032 includes the first LED chip
10321, the second LED chip 10322 and third LED chip 10323.Three LED chips are spaced apart setting.Three LED chips
Luminous wavelength is different, such as be respectively as follows: infrared wavelength 940nm or so, blue light wavelength 460nm, green wavelength 510nm.
Lens can be equipped in first transmitting tube 103, lens are arranged above LED chip 1032, elongate lens, it is possible to increase poly-
Angular.Lens are using the materials such as PMMA, PC, optical glass or silica gel, and angle is bigger, and light extraction efficiency is higher, saturating with low-angle
Mirror, light are penetrated far.
In addition, more modification smoke-box (i.e. labyrinth) internal structures are accurate come the alarm for improving smoke detector in the prior art
Degree, and the improvement that multiple and different wavelength LED chips are integrated in single LED lamp bead 1 by transmitting tube can be used in the embodiment of the present invention
Mode improves the accuracy and sensitivity of smoke detector, and the improved procedure is more convenient in the process of implementation, at low cost,
The accuracy of smoke detector alarm can be proposed without modifying too many smoke-box (i.e. labyrinth) internal structure.In addition, more
Wavelength encapsulates chip compared with Single wavelength encapsulates chip, which has saved mould group cost.
The foregoing describe the structures of the first transmitting tube 103.Similar structure, preferred package can be used in second transmitting tube 104
There are three the LED of different wave length.The wavelength of second transmitting tube 104 is preferably different from the wavelength of the first transmitting tube 103.
According to a preferred embodiment of the present invention, first transmitting tube 103, the second transmitting tube 104, reception pipe arrangement
In the same plane, and the first transmitting tube 103 and the angle of the reception pipe 105 are between 121 °~147 °, the second transmitting
Pipe 104 and the angle of the reception pipe 105 are between 60 °~91 °.
For the second transmitting tube, the second transmitting tube 104 and the above-mentioned angular range of the reception pipe 105 can effectively drop
Low noise.Such as compared by taking 45 degree of smaller angle and 85 degree of angle within the scope of this as an example, compare the received light of reception pipe
Noise.In the case where light emulates tracing mode, light line number can characterize the light intensity for being directly entered reception pipe, direct from incident light
The light intensity for being reflected into reception pipe belongs to noise.It can be obtained by emulation, in the case where 85 degree, noise figure 1.09E-
07, in the case where 45 degree, noise figure 6.38E-07 is six times of the previous case or so.Therefore through the invention
Angular range can be effectively reduced the noise of reception pipe, improve smog alarm precision.For the angle of the first transmitting tube and reception pipe
Degree is also equally that angular range disclosed by the invention can be effectively reduced the noise level of reception pipe.
In the present invention, the first transmitting tube and the second transmitting tube can be monochromatic luminous tube, such as infraluminescence pipe/blue light hair
Light pipe, or recombination luminescence pipe, such as infrared and blue light recombination luminescence pipe.
It is described by taking three LED chips as an example in Fig. 3, however, the present invention is not limited thereto, the first transmitting tube 103 and second
Also may include the LED chip of other numbers in transmitting tube 104, for example, 2,4,5 and greater number LED chip, these are all
Within the scope of the invention.
Below with reference to the smoke detection method 400 of Fig. 4 description in accordance with a preferred embodiment of the present invention.
As shown in figure 4, lighting the first transmitting tube in step S401, emit the first light, reflects and/or scatter through smog
Afterwards, it is incident in reception pipe and generates the first output F_IR.
In step S402, the second transmitting tube is lighted, emits the second light, after smog reflects and/or scatters, is incident on and connects
The second output B_BL is generated in closed tube；
In step S403, difference, ratio based on first output and second output or combinations thereof, judgement
With the presence or absence of fire.
Wherein the sequence of step S401 and S402 is not construed as limiting the invention, can be according to step S401, S402
Sequence carry out, can also be carried out according to the sequence of step S402, S401, can also the two carry out simultaneously, these are all in the present invention
In the range of.Due to that the emission wavelength of the first transmitting tube, the second transmitting tube can be distinguished, in reception pipe,
It can be distinguished by wavelength, therefore no matter which kind of sequentially, can realize technical solution of the present invention.
In step S404, when judgement is there are when fire, triggering is alarmed.The side of sound, light, image or a combination thereof can be passed through
Formula provides alarm.
Below with reference to the smoke detection method 500 of Fig. 5 description in accordance with a preferred embodiment of the present invention.Smoke detection method
500 can be implemented by smoke detector 100 above.
In step S501, the first transmitting tube of a period of time is lighted, emits the first light, collects first in reception pipe
It exports (ir scattering sense cigarette value F_IR).First transmitting tube such as infrared transmitting tube.
In step S502, the second transmitting tube of a period of time is lighted, emits the second light, collects second in reception pipe
Output (blue light scattering sense cigarette value B_BL).Second transmitting tube blue emission pipe for example different from the first transmitting tube wavelength.Equally
, the present invention is not limited to the sequences of step S501 and step S502, successively execute, or be performed simultaneously, all in guarantor of the invention
It protects in range.
In step S501 and S502, the fluorescent lifetime of lighting of the first and second luminous tubes can be 70~90us, preferably
80us。
In step S504, judge whether first output (feux rouges scattering sense cigarette value F_IR) is more than the maximum alarm set
Threshold value absolute value (first threshold), in this embodiment, first threshold is, for example, 200.If it does, then there are fire (steps for judgement
Rapid S505), fire-alarm alarm；If be less than, proceed to step S506, judges whether the first output F_IR surpasses
It crosses multi-channel sampling decision threshold (second threshold), in this embodiment, second threshold absolute value is, for example, 30.If be not above,
Then fire (step S507) is not present in judgement, completes this probe algorithm；If it does, then continuing to step S508, sentence
Whether disconnected second output (blue light scattering sense cigarette value B_BL) meets greater than third threshold value (the present embodiment is, for example, 90), if it is determined that
It is more than then to proceed to step S505, there are fire, alarms for judgement；If be not above, proceed to step S509, judges
Whether one output matches default Fire Mode with the second output, and if judgement meets, then there are fire (step S505), reports for judgement
It is alert；If do not met, equipment is normal, and fire (step S507) is not present in judgement.
According to a preferred embodiment of the present invention, the one group of light source of multiple wavelength, institute are packaged in the first transmitting tube
The step of stating second group of light source for being packaged with multiple wavelength in the second transmitting tube, judging whether there is fire includes: based on described
Multiple first outputs and the one group of light source that the light of multiple wavelength of one group of light source generates in the reception pipe
Multiple second outputs that the light of multiple wavelength generates in the reception pipe, judge whether there is fire.Wherein first hair
The LED of different wave length there are three preferred packages in pipe is penetrated, there are three different wave lengths for preferred package in second transmitting tube
LED.Launch wavelength between each LED is different.
The group exported by the first output with second being described below in accordance with a preferred embodiment of the present invention merges basis
The method that default Fire Mode is judged.
In common application scenarios, different comburants and different types of interference source, can to different angle, no
The incident light of co-wavelength is modulated accordingly.Therefore fire knowledge can be established for typical scenes such as comburant and chaff interferents
Other training data signature.Corresponding training data signature table is for example as shown in table 1 below.It is tried by a large amount of simulated combustion
It tests, can establish table 1.
Table I
It is to be illustrated by taking two luminous tubes as an example in table 1, wherein including three light sources in each luminous tube, such as such as
Luminous tube shown in Fig. 3.In addition, the numerical value in table 1 only makes reference schematic use.Under varying experimental conditions, such as not
Co-wavelength, different angle, detecting chamber of different shapes etc., have different signal strengths.
Launch angle corresponding to first transmitting tube is, for example, launch angle 1, wherein containing there are three the light source of wavelength, wavelength
Respectively wavelength 1, wavelength 2, wavelength 3.Launch angle corresponding to second transmitting tube is, for example, launch angle 2, wherein containing three
The light source of a wavelength, wavelength are respectively wavelength 1, wavelength 2, wavelength 3 (three wavelength for being preferably different from the first transmitting tube).It is passing
Fire detecting method is run on sensor or control device, it can each road measuring signal of taken at regular intervals (1 wavelength 1 of launch angle, the angle of departure
Spend 1 wavelength 2,1 wavelength 3 of launch angle ..., launch angle n wavelength 1, launch angle n wavelength 2, launch angle n wavelength 3), monitoring
To after each road signal data, data are handled in real time, signs with training system for fire and carry out related operation analysis, the output of operation
The result is that fire or non-fire.In view of the optimization of power consumption considerations is, only when the test signal monitored all the way is more than setting
After threshold value, restart more multiplexed signal sampling, the biggish signal acquisition of power consumption can be optimized in this way.
First transmitting tube and the second transmitting tube light respectively shine after, the folding of different wave length will be received in reception pipe
Penetrate/light is scattered, which transmitting tube will be distinguished according to the difference of wavelength is from.In the smoke sensor device course of work,
According to the relevant parameter and its wavelength of the incident light that reception pipe receives, it is compared with the training data of table 1 signature table, it can
Further more accurately to judge whether to occur fire, or even it can judge the type of fire comburant.
Certainly, during being compared, the parameter surveyed may not be able to strictly be matched with the training data of table 1
Signature table.In the case, the parameter currently surveyed and which kind of class can be judged by technologies such as pattern-recognition, data classifications
The comburant or interference source of type are closest.These are all within the scope of the present invention.
Table 1 is produced in reception pipe after superrefraction and/or scattering with the light beam of each wavelength of the first, second transmitting tube
Raw multiple first outputs and multiple second outputs are combined to carry out the identification of comburant and/or interference source, and the present invention is unlimited
In this.The ratio of the output of difference F_IR-B_BL and/or first and the second output of the first output and the second output can also be passed through
F_IR/B_BL judges.The thinking of realization is similar with table 1, and typical combustion object can be obtained by simulated fire experiment and is done
The representative value for disturbing the difference and ratio of the first output and the second output in the case where source, then in real work operational process,
Matching is compared with representative value for measured value, to judge fire, comburant and chaff interferent type is distinguished, reduces rate of false alarm.
It is to be illustrated a little by taking three two transmitting tubes, each transmitting tube LED as an example above.The present invention can also have it
His implementation, such as the first and second transmitting tubes are Single wavelength transmitting tube, such as Single wavelength LED encapsulation, are located at difference
Launch angle, transmitting tube wavelength is different (such as the first transmitting tube my infrared transmitting tube, the second transmitting tube is blue emission pipe).
In this case, reception pipe just includes 2 tunnel measuring signals: 1 wavelength 1 of launch angle, 2 wavelength 2 of launch angle.Training data
Signature table will be reduced to two row matrixs.These are within.
Embodiment through the invention can be more precisely carried out smoke detection and alarm, solve existing detector
Method mostly based on single smokescope, can not solve it is low wrong report, wide spectrum smog partial size response, black and white cigarette it is uniform response, it is sensitive
Spend the problems such as adjustable.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (12)
1. a kind of smoke detector, comprising:
Ontology has detecting chamber in the ontology；
First transmitting tube and the second transmitting tube are arranged in the ontology, and are configured to emit into the detecting chamber respectively
First light and the second light；
Reception pipe, first light and the second light can be incident on the reception pipe after refraction and/or scattering, described to connect
Closed tube generates output according to the intensity of incident light；
Control device, the control device are coupled with the reception pipe, are received first light and are generated in the reception pipe
The first output and the second output for being generated in the reception pipe of second light, and be configured to based on described first defeated
Out with the difference of the second output, ratio or combinations thereof, fire is judged whether there is.
2. smoke detector according to claim 1, which is characterized in that further include warning device, the warning device with
Control device coupling, and when control device judgement is there are when fire, the warning device are triggered alarm.
3. smoke detector according to claim 1 or 2, which is characterized in that be packaged in first transmitting tube multiple
The one group of light source of wavelength is packaged with second group of light source of multiple wavelength, the control device configuration in second transmitting tube
Multiple first outputs and described the generated in the reception pipe at the light of multiple wavelength based on the one group of light source
Multiple second outputs that the light of multiple wavelength of one group of light source generates in the reception pipe, judge whether there is fire,
Wherein preferred package is there are three the LED of different wave length in first transmitting tube, preferred package in second transmitting tube
There are three the LED of different wave length.
4. smoke detector according to claim 1 or 2, which is characterized in that first transmitting tube is infrared transmitting tube,
Second transmitting tube is blue emission pipe.
5. smoke detector according to claim 4, which is characterized in that the control device is configured in the following manner
To control first transmitting tube and the second transmitting tube and judge whether there is fire:
The first transmitting tube is lighted, the first light is emitted, acquires first output of the reception pipe based on first light；
The second transmitting tube is lighted, the second light is emitted, acquires second output of the reception pipe based on second light；
Judge whether first output is more than first threshold；If it does, there are fire for judgement；Otherwise, judge the first output
It whether is more than second threshold, if be less than, fire is not present in judgement.
6. smoke detector according to claim 5, which is characterized in that the control device is configured to: if first is defeated
Out it is more than second threshold, judges whether the second output is more than third threshold value, if it does, then there are fire for judgement, otherwise, judgement
Whether the first output meets the Fire Mode in training set with the second output, if met, judges there are fire,
Wherein the first transmitting tube lighting time is 70~90us, preferably 80us, and the second transmitting tube lighting time is 70
~90us, preferably 80us.
7. smoke detector according to claim 1 or 2, which is characterized in that first transmitting tube and the reception pipe
Angle in a horizontal plane is at 121 °~147 °, and second transmitting tube and the angle of the reception pipe in a horizontal plane are at 60 °
~91 °.
8. a kind of smoke detection method, comprising:
The first transmitting tube is lighted, the first light is emitted, after smog reflects and/or scatters, is incident in reception pipe and generates first
Output；
The second transmitting tube is lighted, the second light is emitted, after smog reflects and/or scatters, is incident in reception pipe and generates second
Output；
Difference, ratio based on first output and second output or combinations thereof, judge whether there is fire.
9. smoke detection method according to claim 8, which is characterized in that further include: when judgement is there are when fire, triggering
Alarm.
10. smoke detection method according to claim 8 or claim 9, which is characterized in that be packaged in first transmitting tube more
The one group of light source of a wavelength is packaged with second group of light source of multiple wavelength in second transmitting tube, judges whether there is fire
The step of calamity include: the light of multiple wavelength based on the one group of light source generated in the reception pipe it is multiple first defeated
Out and the light of multiple wavelength of the one group of light source generated in the reception pipe it is multiple second output, judge whether
There are fire,
Wherein preferred package is there are three the LED of different wave length in first transmitting tube, preferred package in second transmitting tube
There are three the LED of different wave length.
11. smoke detection method according to claim 8 or claim 9, which is characterized in that the step for judging whether there is fire
Suddenly include:
Judge whether first output is more than first threshold；If it does, there are fire for judgement；Otherwise, judge the first output
It whether is more than second threshold, if be less than, fire is not present in judgement, if the first output is more than second threshold, judges the
Whether two outputs are more than third threshold value, if it does, then there are fire for judgement, otherwise, judge that the first output is with the second output
The no Fire Mode met in training set, if met, judgement there are fire,
Wherein the first transmitting tube lighting time is 70~90us, preferably 80us, and the second transmitting tube lighting time is 70
~90us, preferably 80us.
12. smoke detection method according to claim 8 or claim 9, which is characterized in that the smoke detection method passes through as weighed
Benefit requires smoke detector described in any one of 1-7 to execute.
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| CN201910126962.4A CN109712367A (en) | 2019-02-20 | 2019-02-20 | Smoke detector and smoke detection method |
| US16/795,772 US11195400B2 (en) | 2019-02-20 | 2020-02-20 | Smoke detector and method for detecting smoke |
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|---|---|---|---|
| CN201910126962.4A CN109712367A (en) | 2019-02-20 | 2019-02-20 | Smoke detector and smoke detection method |
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| CN110095392A (en) * | 2019-05-07 | 2019-08-06 | 河海大学常州校区 | A kind of dust detection method based on photoelectric sensor, apparatus and system |
| CN110514592A (en) * | 2019-09-03 | 2019-11-29 | 上海贝岭股份有限公司 | Smoke detector and its control method |
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| CN111487171A (en) * | 2020-04-28 | 2020-08-04 | 武汉拓宝科技股份有限公司 | Forward and backward combined dual-wavelength dispersed fire smoke detector and method |
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| CN114913667A (en) * | 2022-05-06 | 2022-08-16 | 合肥科大立安安全技术有限责任公司 | Anti-interference sensing device for smoke in early stage of fire and anti-interference method thereof |
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| CN112562253A (en) * | 2019-09-26 | 2021-03-26 | 杭州海康消防科技有限公司 | Smoke sensor, smoke alarm method and smoke alarm device |
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