CN104637234B - Smoke detector certification device and calibration method based on laser light scattering measurement principle - Google Patents

Smoke detector certification device and calibration method based on laser light scattering measurement principle Download PDF

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CN104637234B
CN104637234B CN201510071829.5A CN201510071829A CN104637234B CN 104637234 B CN104637234 B CN 104637234B CN 201510071829 A CN201510071829 A CN 201510071829A CN 104637234 B CN104637234 B CN 104637234B
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photoelectric sensor
smog
light
smoke detector
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CN104637234A (en
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陈钊
孔令刚
柏林
谭垒
雷文龙
郭洪祥
唐瓒
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CCTEG Chongqing Research Institute Co Ltd
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CCTEG Chongqing Research Institute Co Ltd
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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
    • G08B17/107—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 for detecting light-scattering due to smoke
    • 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
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/59—Transmissivity

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  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
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  • Business, Economics & Management (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

The invention provides a smoke detector certification device based on a laser light scattering measurement principle. The smoke detector calibrating device comprises a certification instrument and a calibration instrument, wherein the certification instrument comprises a certification instrument processing circuit, a measurement cavity 14 and a first photoelectric sensor 13, the measurement cavity is provided with a first transparent window 20 and a second transparent window 21, and the calibrationinstrument comprises a second photoelectric sensor 17 and a trigger 18; a measurement beam 23 is incident from the first transparent window and exits from the second transparent window; the first photoelectric sensor 13 is used for detecting the light intensity of a scattered beam formed in a way that the detected smoke is scattered; the second photoelectric sensor 17 is used for detecting the light intensity of a transmitted beam which is formed by passing through the detected smoke and exits from the second transparent window; the trigger is used for synchronously triggering the first photoelectric sensor and the second photoelectric sensor. According to the smoke detector certification device, a calibration scheme of synchronously triggering the first photoelectric sensor and the second photoelectric sensor at high speed is adopted, so that the difficulty of no standard smoke sample is solved.

Description

Smoke detector assay device based on laser defusing measure principle and scaling method
Technical field
The present invention relates to the assay device of a kind of smoke detector, be specifically related to a kind of based on laser defusing measure principle Smoke detector assay device and scaling method.
Background technology
For dissimilar and different phase fire, the sensing technology being widely used has: gas-sensitive type sensing fire The combustible gas component of calamity release, the infrared type detection thermal source of fire, the ultraviolet light of ultraviolet type detection fire association, Yi Jili Subtype sensing fire hazard aerosol fog particle is to the ionization interference of subfield, the particle concentration of photoelectric type measurement fire hazard aerosol fog or smoke particle pair The occlusion effect (hereafter referred to collectively as corpuscular type) of light.Mine smoke sensor is that the important of mine safety production monitoring sets Standby, along with technical merit improves constantly, its leading position is gradually changed into corpuscular type by gas-sensitive type.Especially need early prevention The occasion of fire incident, such as dangerous higher portions of glowing such as monitoring the adhesive tape mechanical friction of down-hole, electric cable heating, spontaneous combustion of coal seam Position, the technical advantage of photoelectric sensing becomes apparent from, and it has a extensive future.
The mine smoke sensor examination criteria in past, it is desirable to detection is smog mass concentration, and its shortcoming one is real-time Property poor, two is that the measurement error of mass concentration and response time is big, during three are detection, the control difficulty of smog mass concentration Greatly.Currently, the core technology index of mine smoke sensor has been changed to shading rate (dimension is %obs/m).Examined equipment Restriction, the most only evaluate Smoke Sensor warning under a certain concentration threshold and trigger, it is impossible to complete the arbitrary smog of gamut The calibrating of concentration, also cannot be traced to the source by the calibrating benchmark Completion Techniques devise a stratagem amount of other industry.Therefore, detection inspection body and life Produce enterprise and need the novel assay device of gamut scope badly, for the correct performance parameter passing judgment on mine smoke sensor, promote The development of domestic independent research and development capacity.
Summary of the invention
In consideration of it, the present invention provides scatter-type smoke detector assay device and the demarcation side that need not standard smog sample Method.
It is an object of the invention to be realized by such technical scheme, smoke detection based on laser defusing measure principle Device assay device, including calibrating instrument and marking apparatus, described calibrating instrument includes that calibrating instrument processes circuit, is provided with the first transparent window 20 and second transparent window 21 measurement chamber 14 and the first photoelectric sensor 13, described marking apparatus includes the second photoelectric sensor 17 and trigger 18；Measuring beam 23 is incident by the first transparent window, by the second transparent window outgoing after tested smog；Described The light intensity of the scattered beam that the first photoelectric sensor 13 is formed through the scattering of tested smog for detection；Described second photoelectric sensor The light intensity of 17 transmitted light beams formed through tested smog for detection；Described trigger synchronize trigger the first photoelectric sensor and Second photoelectric sensor.
Preferably, described first transparent window 20 and the second transparent window 21 are axially respectively arranged at survey along measure chamber 14 The both sides in amount chamber；Described scattered beam is from the first transparent window outgoing, and described transmitted light beam is from the second transparent window outgoing；
Or the ring light electric transducer that described first photoelectric sensor and the second photoelectric sensor are integrated, described Ring light electric transducer has internal ring detection region and outer shroud detection region, and the light intensity of scattered beam is by outer shroud detection region inspection Surveying, the light intensity of transmission light is detected region detection by internal ring.
The two of the purpose of the present invention are to provide and use said apparatus to carry out the method demarcated, and comprise the following steps:
1) aerosol generator produces smog, is passed through measurement chamber after smog is relatively stable；Trigger output pulse, triggers the One photoelectric sensor and the second photoelectric sensor gather data and store；
2) regulation aerosol generator, changes the concentration of smog, the output pulse of trigger randomness in the process, triggers First photoelectric sensor and the second photoelectric sensor gather data and store；
3) step 2 is repeated) repeatedly；
4) removing significant singular value in test data, paired data fits to curvilinear equation, abscissa is scattered light Power, vertical coordinate is transmitted optical power, determines the maximum deviation value of test data and matched curve；
5) curve coefficients is write in the program storage of smoke detector.
Preferably, in step 1) front step A that also includes: described step A, particularly as follows: keep the clean state measuring chamber, rises Flip-flop output pulse signal, triggers the first photoelectric sensor and the second photoelectric sensor gathers data and stores.
Owing to have employed technique scheme, present invention have the advantage that:
The present invention utilizes electronic synchronizer device high-speed synchronous to trigger first photodetector and the second of marking apparatus of calibrating instrument Photodetector, it is achieved to smog scattered light power and the synchronous acquisition of transmitted optical power, sets up scattered light and changes with transmission light Accurate functional relationship, overcoming in reality cannot the difficult problem of manufacturer's standard smog sample.During application smoke detector, according in advance The function established, is gone out the transmitted optical power of smog, thus obtains the shading rate of tested smog by the scattered light power counter-calculation surveyed Or concentration.The method has without standard smog sample, the timing signal smokescope advantage such as arbitrarily, it is adaptable to scatter-type smog passes The calibrating of sensor or staking-out work of dispatching from the factory.
Accompanying drawing explanation
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing the present invention made into The detailed description of one step, wherein:
Fig. 1 is caliberating device composition frame chart；
Fig. 2 is that calibrating instrument processes circuit block diagram
Fig. 3 is aerosol generator structural representation；
Fig. 4 is backward type scatterometry and demarcates light path schematic diagram；
Fig. 5 is forward-type scatterometry and demarcates light path schematic diagram.
Detailed description of the invention
Below with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail；Should be appreciated that preferred embodiment Only for the explanation present invention rather than in order to limit the scope of the invention.
The suspension particulate that fire produces forms smog, and particle content is the highest, then smokescope is the highest, the screening to light Block effect the best, otherwise also set up.Therefore, use shading rate to weigh the height of smokescope, it is determined that the developmental stage of fire or The order of severity.Mine smoke sensor accurately estimates smokescope with the shading rate of 1m thickness smog, and its mathematical definition is:
S = ( 1 - I o I i ) × 100 % - - - ( 1 )
Wherein, S is shading rate, IiFor input light intensity, IoFor the transmitted light intensity through 1m thickness smog, T=I0/IiFor thoroughly Light rate.
The mensuration of assay device shading rate obeys formula (1).By volumetric constraint, the smog that assay device measuring beam passes is thick Degree is not up to 1m, and the shading rate of actual measurement need to calculate the shading rate of 1m thickness smog equivalence.Assume tested smokescope relatively Low and uniform, ignore the interaction between smoke particle, and use collimated monochromatic ligth vertical irradiation.According to langbobier law, The smog light transmittance T of measuring beammIt is respectively as follows: through the light transmittance T of the identical tested smog of 1m thickness with it
T m = I ol I il = e - κCl - - - ( 2 )
T = I o I i = e - κC - - - ( 3 )
Wherein, IilLight intensity, I is inputted for measuring beamolFor measuring beam transmitted light intensity, K is fume absorbent coefficient, and C is cigarette Fog particles concentration, l is the thickness (unit: m) that measuring beam passes tested smog.Bring formula (2) into formula (3).Obtain:
T = ( T m ) 1 l = ( I ol I il ) 1 l - - - ( 4 )
Formula (4) is substituted into formula (1), then the shading rate of 1m thickness smog is:
S = ( 1 - ( I ol I il ) 1 l ) × 100 % - - - ( 5 )
At fire commitment, smokescope is relatively low, and smoke particle particle diameter is concentrated mainly on few tens of nanometers scope[5], If I directly measured by assay deviceolAnd Iil, and calculating smokescope by formula (5), it is measured, and sensitivity is poor, error is bigger.Thing In reality, when a branch of collimated monochromatic ligth irradiates smoke particle, scattering phenomenon also will occur.Cigarette is reflected by the change of scattered light intensity The change of fog particles concentration, i.e. utilizes the scattered light intensity I of measuring beamslIndicator transmitted light intensity Iol, it is thus achieved that high sensitivity, high-precision The measurement result of degree.Set up functional relationship accordingly:
Iol=f-1(Isl) (6)
In like manner, formula (6) being substituted into formula (5), the formula (1) of unmodified is transformed into:
S = ( 1 - ( f - 1 ( I sl ) I il ) 1 l ) × 100 % - - - ( 7 )
Because of smoke particle particle diameter and the spatial distribution of density and the randomness of time, reality is difficult to manufacturer's standard concentration Smoke particle sample, uses conventional scaling method to be accurately determined IslAnd IolFunctional relationship, exist great technology be stranded Difficult.In the present invention, use high speed flip flop to synchronize to trigger scattered light and the photoelectric sensor of transmission light measurements, compare smog grain Sub-density and the change of flow velocity, if the response time of photoelectric sensor and difference thereof are the shortest, then it is believed that the two measure be Same smog object.Thus, in the calibration process of device, the photoelectric sensor that device carries is in off-axis orientation measurement Isl, profit With the high precision photoelectric sensor demarcated outside device at axially measured Iol, obtain the I that a certain concentration smog is correspondingslAnd Iol。 Repeat the above steps, it is thus achieved that the I that variable concentrations smog is correspondingslAnd Iol.On this basis, removing significant singular value, segmentation is intended Close IslWith IolFunction curve, so that it is determined that go out f-1。
Based on above-mentioned thought, the present invention provides a kind of smoke detector assay device based on laser defusing measure principle, Including calibrating instrument and marking apparatus, described calibrating instrument includes that calibrating instrument processes circuit, to be provided with the first transparent window 20 and second saturating The measurement chamber 14 of bright window 21 and the first photoelectric sensor 13, described marking apparatus includes the second photoelectric sensor 17 and trigger 18；Measuring beam 23 is incident by the first transparent window, by the second transparent window outgoing after tested smog；Described first photoelectric transfer The light intensity of the scattered beam that sensor 13 is formed through the scattering of tested smog for detection；Described second photoelectric sensor 17 is used for detecting Light intensity through the transmitted light beam that tested smog is formed；Described trigger synchronizes to trigger the first photoelectric sensor and the second photoelectric transfer Sensor.
Fig. 4 is backward type scatterometry and demarcates light path schematic diagram, and wherein calibrating instrument uses split type setting with marking apparatus Put.
Described first transparent window 20 and the second transparent window 21 measure chamber along measuring axially being respectively arranged at of chamber 14 Both sides；Described scattered beam is from the first transparent window outgoing, and described transmitted light beam is from the second transparent window outgoing.
Described calibrating instrument also includes extender lens 9, spatial filter 10 and the collimating lens 11 set gradually；Described demarcation Instrument also includes that collecting lens 16, described collimating lens and collecting lens are arranged on the both sides measuring chamber, the emergent light of collimating lens Entering in measurement chamber, the scattered beam formed through smog 19 scattering enters in the first photoelectric sensor 13, through smog transmission The transmission light formed enters in collecting lens, and the emergent light of collecting lens enters in the second photoelectric sensor 17.
Fig. 5 is forward-type scatterometry and demarcates light path schematic diagram, and wherein calibrating instrument and marking apparatus use integral type to set Put.
The ring light electric transducer that described first photoelectric sensor and the second photoelectric sensor are integrated, described ring Shape photoelectric sensor has internal ring detection region 171 and outer shroud detection region 172, and the light intensity of scattered beam is detected region by outer shroud Detection, the light intensity of transmission light is detected region detection by internal ring.
Described calibrating instrument also includes extender lens 9, spatial filter 10 and the collimating lens 11 set gradually；Described demarcation Instrument also includes that collecting lens 16, described collimating lens and collecting lens are arranged on the both sides measuring chamber, the emergent light of collimating lens Entering in measurement chamber, the transmission light formed through smog transmission enters in collecting lens, the converging light of the formation of collecting lens Bundle enters into the endocyclic area of ring light electric transducer, and the scattered beam that collecting lens edge is formed enters into annular photoelectric sensing The outer region of device.
Described caliberating device also includes aerosol generator, and described aerosol generator is connected by gas circuit with measuring chamber.
As it is shown on figure 3, described aerosol generator includes that flue 7, described flue are provided with smoke inlet 4 and aerosol outlet port 1, Being provided with air pump 5 in described flue, smog, under the driving of air pump, enters flue through smoke inlet and circulates. In the present embodiment, aerosol generator uses ring-shaped flue, and its inner wall smooth, inner and outer diameter is respectively 300mm and 420mm.Cigarette Electric filament disc 3 is set outside road, is used for heating defat cotton sliver to produce smog.Under the driving of air pump 5, smog is through air inlet pipe Road enters ring-shaped flue and circulates, and improves uniformity and the stability of smoke particle density spatial distribution.Flue is arranged Having twice drainage screen, i.e. air inlet screen 6 and exhaust screen 2, smoke particle particle diameter is limited in 8um and following by air inlet screen, The effect of exhaust screen is that the adverse current preventing smog is polluted.Described smoke inlet is arranged on air inlet screen rear end.
Described calibrating instrument includes measurement light source 8, extender lens 9, spatial filter 10 and the collimating lens 11 set gradually, Described marking apparatus also includes that collecting lens 16, described collimating lens and collecting lens are arranged on the both sides measuring chamber, collimating lens Emergent light enter into measurement chamber in.
In the present embodiment, measuring light source 8 and use solid state laser, its emergent light is after extender lens expands, by space Filtering intercepts the more uniform beam center portion of light distribution, then becomes measuring beam after being collimated by collimating lens.Measure light Bundle passes perpendicularly through and irradiates and flows through the tested smoke particle group measuring chamber.
As to further improvement of this embodiment, described calibrating instrument also includes being arranged on collimating lens and measuring between chamber The first diaphragm 12 and be arranged on the second diaphragm 15 measured between chamber 14 and collecting lens.Diaphragm is used for preventing paraxial veiling glare To the interference measured.
Fig. 3 show the process circuit theory diagrams of calibrating instrument.Described calibrating instrument processes circuit and includes amplifier, A/D mould Block, DSP, pump control module, temperature control modules, memorizer, touch screen, communication interface and audible-visual annunciator
The output of scattered light electric explorer, after precision amplifier and 16 A/D conversions, inputs dsp processor.Its In, power reference provides reference power supply for A/D converter, and its temperature drift built-in reference power supply of coefficient ratio transducer is much smaller.At DSP Reason device is the core processing circuit, and undertaking of task is the air pump within control aerosol generator and calibrating instrument, regulation laser Device operating temperature, sound and light alarm signal export, and communication and data calculating etc..By built-in calibrating procedure, dsp processor Output pulse signal, the synchronizer trigger outside linkage, by the original data storage of demarcation to data storage and upload in good time. Realize man-machine interaction by LCD touch screen, show the various data such as verification result, state.If desired can by communication interface with Data are uploaded by RS485 or ICP/IP protocol, or receive host computer instruction and data.
When applying assay device, the luminous power measuring light source uses laser instrument output nominal value, need to take temperature control Measure ensures the stability of measuring beam luminous power, reduces temperature drift.Therefore, assay device includes semiconductor cooler and adds The thermostat that heated filament is constituted, is controlled by temperature control algorithm by the DSP of calibrating instrument, make the operating temperature of laser instrument be maintained at 25 ± In the range of 2 DEG C.Theoretical by Mie, the particle of same particle diameter is the most notable to the scattering of short wavelength, and the wavelength of measuring beam should appropriateness Shorten.In this example, centre wavelength 405nm of the ripple that laser instrument sends, live width 30nm, emergent power 2mW.
In this example, scattered light power measured by the first photoelectric sensor, and sensitivity is higher, dark current is less, and peak value rings Answering wavelength is 30 ° near measuring beam wavelength, central axis with the setting angle of optical axis.For ensureing to be sampled as same smoke particle The scattered light of group, relative to mist flow rate and measuring beam diameter, the output response time of the first photoelectric sensor device should be tried one's best Little, the photoelectric sensor response time of calibrating instrument type selecting is 15us.
For reducing the impact on measuring of smoke particle Spatial Density Distribution uniformity and flow velocity, measuring beam diameter and wearing The smog thickness crossed wants appropriateness.Through overtesting, taking a diameter of 2mm of measuring beam, the smog thickness axially irradiated is 20mm.First The synchronous error of photoelectric sensor and the second photoelectric sensor is the least, and when demarcating calibrating instrument, external electrical microsyn output is double The time error of road pulse is less than 10ns.
According to above-mentioned assay device, the present embodiment also provides for a kind of smoke detector mark based on laser defusing measure principle Determine method, specifically include following steps:
1) according to shown in Fig. 4, the first photoelectric sensor of alignment detector and the second photoelectric sensor on optical table； Trigger is connected to the first photoelectric sensor and the second photoelectric sensor；Utilize and gather trachea connection aerosol generator and measurement Chamber.
2) calibrating instrument measures chamber holding clean state, start trigger output pulse signal, triggers the first photoelectric sensor Gather data with the second photoelectric sensor and store.
3) aerosol generator heating defat cotton sliver produces smog, is passed through detector after smog is relatively stable.Start trigger Device output pulse, triggers the first photoelectric sensor and the second photoelectric sensor gathers data and stores.
4) regulation aerosol generator, changes smokescope, and randomness start trigger output pulse, triggers in the process First photoelectric sensor and the second photoelectric sensor gather data and store.
In this reality cigarette example, change smokescope and refer to gradually strengthen smokescope or be gradually lowered smog low concentration or add By force, reduce alternately.
5) repeat many times of step 4, generally 2～5 times, certainly can also test more times according to test needs.
6) removing significant singular value in test data, simulate the curve of scattering and transmitted optical power, abscissa is scattered Penetrating luminous power, vertical coordinate is transmitted optical power.Determine the maximum deviation value of test data and matched curve.
7) curve coefficients is write the program storage of detector.
8) after having demarcated, withdraw the calibration facility of outside, seal at demarcation transmission light measurements position light absorbent, Reduce the interference to measuring of the transmission luminous reflectance.Calibrating instrument must be demarcated before dispatching from the factory one by one, determines the demarcation that often set calibrating instrument is exclusive Curve.
The present invention utilizes electronic synchronizer device high-speed synchronous to trigger the first photodetector and outside the second photoelectricity demarcated Detector, it is achieved to smog scattered light power and the synchronous acquisition of transmitted optical power, sets up scattered light with the change of transmission light accurately Functional relationship, overcoming in reality cannot the difficult problem of manufacturer's standard smog sample.During application smog calibrating instrument, according to establishing in advance Function, the scattered light power counter-calculation surveyed go out the transmitted optical power of smog, thus obtain the shading rate of tested smog or dense Degree.The method has without standard smog sample, the timing signal smokescope advantage such as arbitrarily, it is adaptable to scatter-type Smoke Sensor Calibrating or staking-out work of dispatching from the factory.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, it is clear that those skilled in the art Member can carry out various change and modification without departing from the spirit and scope of the present invention to the present invention.So, if the present invention These amendments and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these Change and including modification.

Claims (10)

1. smoke detector assay device based on laser defusing measure principle, it is characterised in that: include calibrating instrument and marking apparatus, Described calibrating instrument includes that calibrating instrument processes circuit, is provided with the first transparent window (20) and the measurement chamber of the second transparent window (21) (14) and the first photoelectric sensor (13), described marking apparatus includes the second photoelectric sensor (17) and trigger (18)；Measure Light beam (23) is incident by the first transparent window, by the second transparent window outgoing after tested smog；Described first photoelectric sensor (13) light intensity of the scattered beam formed through the scattering of tested smog for detection；Described second photoelectric sensor (17) is used for detecting Light intensity through the transmitted light beam that tested smog is formed；Described trigger synchronizes to trigger the first photoelectric sensor and the second photoelectric transfer Sensor.
Smoke detection assay device based on laser defusing measure principle the most according to claim 1, it is characterised in that: institute State the first transparent window (20) with the second transparent window (21) along the both sides being axially respectively arranged at measurement chamber measuring chamber (14)； Described scattered beam is from the first transparent window outgoing, and described transmitted light beam is from the second transparent window outgoing.
Smoke detector assay device based on laser defusing measure principle the most according to claim 1, it is characterised in that: The ring light electric transducer that described first photoelectric sensor and the second photoelectric sensor are integrated, described ring light fax Sensor has internal ring detection region (171) and outer shroud detection region (172), and the light intensity of scattered beam is by outer shroud detection region inspection Surveying, the light intensity of transmission light is detected region detection by internal ring.
Smoke detector assay device based on laser defusing measure principle the most according to claim 1, it is characterised in that: Described assay device also includes aerosol generator, and described aerosol generator is connected with measuring chamber；Described aerosol generator includes cigarette Road (7), described flue is provided with smoke inlet (4) and aerosol outlet port (1), is provided with air pump (5) in described flue, and smog exists Under the driving of air pump, enter flue through smoke inlet and circulate.
Smoke detector assay device based on laser defusing measure principle the most according to claim 4, it is characterised in that: Described aerosol generator also includes air inlet screen (6) and the exhaust screen (2) being arranged in flue.
Smoke detector assay device based on laser defusing measure principle the most according to claim 2, it is characterised in that: Described calibrating instrument also includes extender lens (9), spatial filter (10) and the collimating lens (11) set gradually；Described marking apparatus Also including collecting lens (16), described collimating lens and collecting lens are arranged on the both sides measuring chamber, the emergent light of collimating lens Entering in measurement chamber, the scattered beam formed through smog (19) scattering enters in the first photoelectric sensor (13), through smog The transmission light that transmission is formed enters in collecting lens, and the emergent light of collecting lens enters in the second photoelectric sensor (17).
Smoke detector assay device based on laser defusing measure principle the most according to claim 3, it is characterised in that: Described calibrating instrument also includes extender lens (9), spatial filter (10) and the collimating lens (11) set gradually；Described marking apparatus Also including collecting lens (16), described collimating lens and collecting lens are arranged on the both sides measuring chamber, the emergent light of collimating lens Entering in measurement chamber, the transmission light formed through smog transmission enters in collecting lens, the converging light of the formation of collecting lens Bundle enters into the endocyclic area of ring light electric transducer, and the scattered beam that collecting lens edge is formed enters into annular photoelectric sensing The outer region of device.
Smoke detector assay device based on laser defusing measure principle the most according to claim 7, it is characterised in that: Described calibrating instrument also include being arranged on collimating lens and the first diaphragm (12) measured between chamber and be arranged on measurement chamber (14) and The second diaphragm (15) between collecting lens.
9. utilize the smoke detector caliberating device based on laser defusing measure principle described in claim 1 ~ 8 any one to enter The method that rower is fixed, it is characterised in that: comprise the following steps:
1) aerosol generator produces smog, is passed through measurement chamber after smog is relatively stable；Trigger output pulse, triggers the first light Electric transducer and the second photoelectric sensor gather data and store；
2) regulation aerosol generator, changes the concentration of smog, the output pulse of trigger randomness in the process, triggers first Photoelectric sensor and the second photoelectric sensor gather data and store；
3) step 2 is repeated) repeatedly；
4) removing significant singular value in test data, then simulate the curve of scattering and transmitted optical power, abscissa is scattered Penetrating luminous power, vertical coordinate is transmitted optical power, determines the maximum deviation value of test data and matched curve；
5) curve coefficients is write in the program storage of smoke detector.
Smoke detector scaling method based on laser defusing measure principle the most according to claim 9, its feature exists In: before step 1), also include step A:
Described step A, particularly as follows: keep the clean state measuring chamber, start trigger output pulse signal, triggers the first photoelectricity Sensor and the second photoelectric sensor gather data and store.
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