CN106290096A - A kind of household electrical appliance, dust sensor and scaling method, caliberating device - Google Patents

Abstract

The present invention relates to dust concentration detection field, disclose a kind of household electrical appliance, dust sensor and scaling method, caliberating device, described dust sensor includes: device for detecting particles, the population of dust to be measured in detection air-flow；Airflow detecting device, is arranged on the position that described air-flow passes through, and detects flow parameter；And processing means, it is connected with described device for detecting particles and described airflow detecting device, determines dust concentration according to described population and described flow parameter.So it can be avoided that the air-flow impact on result, improve the accuracy of dust sensor.

Description

A kind of household electrical appliance, dust sensor and scaling method, caliberating device

Technical field

The present invention relates to dust concentration detection field, in particular it relates to a kind of household electrical appliance, dust sensor and demarcation thereof Method, caliberating device.

Background technology

Dust sensor, such as laser dust concentration sensor are to utilize MIE scattering theory to enter particle in air The mode that row counting or mass concentration are measured obtains the device of dust concentration.Be generally of an air-guiding aisle, one swash Light-emitting tube and a photo-sensitive cell.Air-flow flows in air-guiding aisle, is irradiated by laser and produce when flowing through above photosensitive part Raw scattered light, photosensitive part receives scattered light, by scattered light is analyzed the situation of dust in air-flow that obtains.

Generally dust sensor gas flows freely over above test point, and test point position is arranged at what LASER Discharge Tube converged Focal point.Under normal circumstances, a DC fan is used to guide air-flow to flow through the top of test point for ensuring steady air current property. The stability of DC fan can affect the stability of sensor, then can affect the actual of sensor the service life of DC fan and make Use the life-span.

Summary of the invention

It is an object of the invention to provide a kind of household electrical appliance, dust sensor and scaling method, caliberating device, these domestic Electrical equipment, dust sensor and scaling method thereof, caliberating device, it can be avoided that the air-flow impact on testing result, improve dust and pass The accuracy of sensor.

To achieve these goals, the present invention provides a kind of dust sensor, and described dust sensor includes: detection of particles Device, the population of dust to be measured in detection air-flow；Airflow detecting device, is arranged on the position that described air-flow passes through, detection Flow parameter；And processing means, it is connected with described device for detecting particles and described airflow detecting device, according to described population And described flow parameter determines dust concentration.

Alternatively, described airflow detecting device is arranged in air channel, and wherein, the air-flow of dust content to be measured is in described air channel Middle circulation.

Alternatively, described airflow detecting device is flow transducer or baroceptor.

Alternatively, the one during described flow parameter is following item: the gas flow in described dust sensor, gas pressure Power and the electrical quantity of described airflow detecting device.

Correspondingly, the present invention also provides for a kind of household electrical appliance, and described household electrical appliance include above-mentioned dust sensor.

Another aspect of the present invention also provides for the scaling method of a kind of dust sensor, and described scaling method includes: select n Individual fixed point；Obtain in population Ni of dust, dust concentration Mi and described dust sensor for each fixed point Flow parameter Xi, wherein i=1,2 ..., n；And according to the population of described dust at all fixed points, dust concentration And flow parameter determines the calibration coefficient of described dust sensor.

Optionally it is determined that the calibration coefficient of described dust sensor includes: for the described dust at all fixed points Population, dust concentration and flow parameter carry out least-squares algorithm linear fitting to obtain described calibration coefficient.

Alternatively, in the case of the population of described flow parameter to described dust is directly proportional, the demarcation system obtained Number is:

Alternatively, dust concentration based on described calibration coefficient is: M=a*N/X+b, and wherein, N is described dust sensor The population of measured dust, X is the flow parameter in dust sensor.

Alternatively, in the case of the population of described flow parameter Yu described dust is inversely proportional to, the demarcation system obtained Number is:

Alternatively, dust concentration based on described calibration coefficient is: M=a*N*X+b, and wherein, N is described dust sensor The population of measured dust, X is the flow parameter in dust sensor.

Alternatively, the one during described flow parameter is following item: the gas flow in described dust sensor, gas pressure Power and the electrical quantity of described airflow detecting device.

Correspondingly, the present invention also provides for the caliberating device of a kind of dust sensor, and described caliberating device includes: above-mentioned dust Sensor, detects the flow parameter in the population of dust at n fixed point and described dust sensor；Reference instrument, The dust concentration of n fixed point of detection；Processor, is connected with described dust sensor and described reference instrument, according to all marks The population of the above-mentioned dust at fixed point, described flow parameter and described dust concentration determine calibration coefficient.

By technique scheme, dust sensor is installed airflow detecting device and detects airflow condition, based on treating Flow parameter in the population of survey dust and dust sensor determines dust concentration.So it can be avoided that air-flow is to result Impact, improves the accuracy of dust sensor.

Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.

Accompanying drawing explanation

Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with following tool Body embodiment is used for explaining the present invention together, but is not intended that limitation of the present invention.In the accompanying drawings:

Fig. 1 is the structured flowchart of the dust sensor provided according to one embodiment of the present invention；

Fig. 2 is the structural representation of the dust sensor provided according to one embodiment of the present invention；

Fig. 3 is the overview diagram of the dust sensor provided according to one embodiment of the present invention；

Fig. 4 is the diagram of the main cavity of the dust sensor according to one embodiment of the present invention offer；

Fig. 5 is the diagram of the upper cover of the dust sensor according to one embodiment of the present invention offer；

Fig. 6 is the diagram bottom the upper cover of the dust sensor according to one embodiment of the present invention offer；

Fig. 7 is the installation diagram of the Laser emission assembly of the dust sensor according to one embodiment of the present invention offer；

Fig. 8 is the side view of the Laser emission assembly of the dust sensor according to one embodiment of the present invention offer；

Fig. 9 is the Laser emission component bottom diagram of the dust sensor provided according to one embodiment of the present invention；

Figure 10 is the flow chart of the scaling method of the dust sensor according to one embodiment of the present invention offer；

Figure 11 is the flow chart of the scaling method of the dust sensor according to another embodiment of the present invention offer；And

Figure 12 is the structured flowchart of the caliberating device of the dust sensor according to one embodiment of the present invention offer.

Description of reference numerals

1 antetheca 2 flow transducer

4 rear wall 5 upper covers

6 main cavity 7 circuit boards

8 fan 9 light trappings

10 Laser emission assembly mounting groove 11 U-shaped air channels

12 fan mounting groove 13 air intakes

14 gas outlet 15 Laser emission assemblies

16 photo-sensitive cell 17 LASER Discharge Tube installation sites

The 18 preposition rearmounted diaphragms of diaphragm 19

20 detection Laser emission assembly radiating holes, hole 22

23 baffle arrangement 24 circuit board air inlets

25 socket mounting hole 26 flow transducer installation sites

27 LASER Discharge Tube 100 device for detecting particles

200 airflow detecting device 300 processing meanss

120 dust sensor 130 reference instruments

140 processors

Detailed description of the invention

Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is described in detail.It should be appreciated that this place is retouched The detailed description of the invention stated is merely to illustrate and explains the present invention, is not limited to the present invention.

Fig. 1 is the structural representation of a kind of dust sensor provided according to one embodiment of the present invention.Such as Fig. 1 institute Showing, the dust sensor that the present invention provides may include that device for detecting particles 100, the population of dust to be measured in detection air-flow； Airflow detecting device 200, is arranged on the position that described air-flow passes through, and detects flow parameter；And processing means 300, with institute State device for detecting particles 100 and described airflow detecting device 200 connects, determine according to described population and described flow parameter Dust concentration.So it can be avoided that the air-flow impact on result, improve the accuracy of dust sensor.

Generally, dust sensor includes circulating in air channel in air channel, the air-flow of dust content to be measured, owing to detection of particles fills Putting 100 detections is the population of dust to be measured in air channel, therefore, it can be arranged in described air channel airflow detecting device 200, So that the air-flow of its detection is corresponding to the air-flow residing for device for detecting particles 100, thus improve accuracy of detection.

In one embodiment, described device for detecting particles 100 may include that light emission component and photo-sensitive cell, light Can be but be not limited to laser.

Wherein, described light emission component may include that light-emitting tube, launches light to irradiate the air-flow of circulation in air channel, and Lens subassembly, is positioned in the light path of described light, for converging the light that described light-emitting tube is launched；Wherein, described photo-sensitive cell position In described air channel, for receiving the scattered light produced after described light irradiates dust.

Described light emission component can also include: preposition diaphragm and rearmounted diaphragm, to prevent luminous reflectance.

Described dust sensor can also include air extractor, is arranged on the wall of described dust sensor, is used for guiding Air-flow circulates in air channel.Wherein, described air extractor such as can be mounted on the wall of the sensor relative with entrance Fan.

The upper cover of described dust sensor can be provided with baffle arrangement, carries out the air-flow entering described dust sensor Stopping makes it flow in described air channel.

The present invention is described in detail by detailed description of the invention below with reference to Fig. 2 to Fig. 6, it is to be noted however that this Invention is not restricted to this.

As shown in Figures 2 to 6, processing means 300 can be with the form being circuit board 7.Air intake 13 can be, but not limited to set Put on the antetheca 1 of the main cavity 6 of dust sensor, its rear wall 4 can arrange fan 8, wind by fan mounting groove 12 Fan 8 can coincide with the position of gas outlet 14；If circuit board 7 is positioned at the lower section of air intake 13, then can arrange thereon Circuit board air inlet 24, so that air-flow enters U-shaped air channel 11.It should be noted that air channel is not restricted to U-shaped, it is permissible It is the shape of any appropriate, such as L-shaped.Fan 8 can guide air-flow to enter U-shaped air channel.

One baffle arrangement 23 can be set on the upper cover 5 of dust sensor, after air-flow is stopped by baffle arrangement 23, by electricity Road plate air inlet 24 enters in the U-shaped air channel 11 in main cavity 6.Upper cover 5 can utilize screw and main cavity 6 by screw column 24 Fit together.Dust sensor can be powered by being installed on the socket at socket mounting hole 25.Laser emission assembly can To be installed in dust sensor by Laser emission assembly mounting groove 10, it is possible to arrange Laser emission assembly radiating hole 22, To distribute heat, it is to avoid laser module is overheated.

Fig. 7 to 9 is the diagram of the Laser emission assembly 15 of the dust sensor according to one embodiment of the present invention offer.

Main chamber body 6 can be provided with light trapping 9, be installed at LASER Discharge Tube installation site 17 for absorbing LASER Discharge Tube 27 launch light, described lens subassembly is between described light trapping 9 and described LASER Discharge Tube 27.Photosensitive Element 16 can be placed in U-shaped air channel 11, and the laser that LASER Discharge Tube 27 sends can be parallel with photo-sensitive cell 16.Launched Laser can be irradiated in the light trapping 9 in main cavity 6 through the surface of photo-sensitive cell 16, and what light trapping 9 absorption was injected swashs Light, to reduce the noise of reflection light.Described light trapping 9 can use light absorbent to make, or non-light absorbent carries out sub-light Process.As shown in Figure 7 to 9, Laser emission assembly 15 can arrange with on circuit board 7.Photo-sensitive cell 16 may be located at detection The inside in hole 20 or the lower section in detection hole 20.Compared with rearmounted diaphragm 19, preposition diaphragm 18 and detection pitch-row are from less.It addition, LASER Discharge Tube louvre can be set, to dispel the heat.

In one embodiment, LASER Discharge Tube 27 can select diameter 6mm, power 3.6mw, the laser of 650 wave bands to send out Penetrate pipe.Described LASER Discharge Tube 27 front end is provided with lens, and laser beam converges in the position of front end 15cm, i.e. photo-sensitive cell Directly over 16.

In one embodiment, the flow transducer 2 being installed on position 26 can be as airflow detecting device.It is permissible Installation site can be in the same plane with photo-sensitive cell 16, in order to detects same air-flow as far as possible.

For above-mentioned dust sensor, the present invention also provides for the scaling method of a kind of dust sensor.As shown in Figure 10, exist Step 101 place, selects n fixed point；In step 102 place, obtain population Ni of dust, dust for each fixed point dense Flow parameter Xi, wherein i=1,2 in degree Mi and described dust sensor ..., n；And in step 103 place, according to institute There are the population of described dust, dust concentration and flow parameter at fixed point to determine the demarcation system of described dust sensor Number.So it can be avoided that the air-flow impact on result, improve the accuracy of dust sensor.

Wherein it is determined that the calibration coefficient of described dust sensor includes: for the grain of the described dust at all fixed points Subnumber, dust concentration and flow parameter carry out least-squares algorithm linear fitting to obtain described calibration coefficient.

In the case of the population of described flow parameter to described dust is directly proportional, calibration coefficient can be from equation (1) (2) draw:

$a=\frac{\left(\mathrm{\Σ}{\left(Ni/Xi\right)}^2\right)\left(\mathrm{\Σ}Mi\right)-\left(\mathrm{\Σ}\right(Ni/Xi\left)\right(\mathrm{\Σ}\left(Ni/Xi\right)Mi)}{n*\left(\mathrm{\Σ}{\left(Ni/Xi\right)}^2\right)-{\left(\mathrm{\Σ}\right(Ni/Xi\left)\right)}^2}---\left(1\right)$

$b=\frac{(n*\mathrm{\Σ}Mi(Ni/Xi\left)\right)-\left(\mathrm{\Σ}\right(Ni/Xi\left)\right)\left(\mathrm{\Σ}Mi\right)}{n*\left(\mathrm{\Σ}{\left(Ni/Xi\right)}^2\right)-{\left(\mathrm{\Σ}\right(Ni/Xi\left)\right)}^2}---\left(2\right)$

Above-mentioned calibration coefficient can be stored in dust sensor, when dust sensor carries out dust detection, permissible Dust concentration is calculated by equation (3) based on described calibration coefficient:

M=a*N/X+b (3)

Wherein, N is the population of the dust measured by described dust sensor, and X is the flow parameter in dust sensor.

In the case of the population of described flow parameter Yu described dust is inversely proportional to, calibration coefficient can be from equation (4) (5) draw:

$a=\frac{\left(\mathrm{\Σ}{\left(Ni*Xi\right)}^2\right)\left(\mathrm{\Σ}Mi\right)-\left(\mathrm{\Σ}\right(Ni*Xi\left)\right(\mathrm{\Σ}\left(Ni*Xi\right)Mi)}{n*\left(\mathrm{\Σ}{\left(Ni*Xi\right)}^2\right)-{\left(\mathrm{\Σ}\right(Ni*Xi\left)\right)}^2}---\left(4\right)$

$b=\frac{(n*\mathrm{\Σ}Mi(Ni*Xi\left)\right)-\left(\mathrm{\Σ}\right(Ni*Xi\left)\right)\left(\mathrm{\Σ}Mi\right)}{n*\left(\mathrm{\Σ}{\left(Ni*Xi\right)}^2\right)-{\left(\mathrm{\Σ}\right(Ni*Xi\left)\right)}^2}---\left(5\right)$

Above-mentioned calibration coefficient can be stored in dust sensor, when dust sensor carries out dust detection, permissible Dust concentration is calculated by equation (6) based on described calibration coefficient:

M=a*N*X+b (6)

Wherein, N is the population of the dust measured by described dust sensor, and X is the flow parameter in dust sensor.

Described flow parameter is the one in following item: gas flow, gas pressure and the institute in described dust sensor State the electrical quantity of airflow detecting device.

The present invention is described in detail by detailed description of the invention below with reference to Figure 11, it is noted that this Bright it is not restricted to this.

In this embodiment, by using flow transducer to measure gas flow, due to constant in external environment condition In the case of, gas flow and the population of dust in same air channel are directly proportional.I.e. flow transducer output and by detection The population of point is directly proportional.

In the embodiment using flow transducer, at dust sensor timing signal due to flow L and dust sensor Population N identified is directly proportional, N/L=constant extraneous dust concentration is certain when, this constant and the reality in current environment Border dust concentration is correlated with.

Usual dust sensor directly uses population N and mass density M to carry out curve fitting at timing signal and demarcates, but It is that the method is owing to by airflow influence, accuracy can be lowered.The dust sensor that the present invention provides can make at timing signal Carry out curve fitting by N/L and mass density M, flow relevant parameter is considered in demarcating flow process, thus provide dust to examine Survey the accuracy of result.

As shown in figure 11, in step 111 place, determine n fixed point, fixed point 1, fixed point 2, fixed point 3, fixed point 4 ... fixed point n；

In step 112 place, initialize i=1；

In step 113 place, the stream of population Ni, dust concentration Mi and flow transducer at record i-th fixed point Amount Li；

In step 114 place, it is judged that whether i is more than or equal to n；

If i is less than n, then in step 115 place, i=i+1 is set, then goes to step 113；

Such as: record population N1 at the 1st fixed point, dust concentration M1 measured by reference instrument and flow and pass Gas flow L1 measured by sensor；

Record population N2 at the 2nd fixed point, dust concentration M2 measured by reference instrument and flow transducer Measured gas flow L2；

Record population N3 at the 3rd fixed point, dust concentration M3 measured by reference instrument and flow transducer Measured gas flow L3；

……

Until having recorded n fixed point corresponding (Ni, Vi, Mi).

In step 116 place, to (N1/L1, N2/L2...Nn/Ln) and (M1, M2 ... Mn) two groups of numbers carry out linear fit To calculate transducer calibration coefficient, owing to gas flow is directly proportional to population, therefore calibration coefficient will equation (1) and (2) In Xi replace with the result obtained by after gas flow Li；

In step 117 place, calibration coefficient is preserved to the memorizer of dust sensor, in order to utilize when test dust Equation (3) calculates dust concentration.

Certainly above-mentioned gas flow can also use the electrical quantity of flow transducer to represent, this electrical quantity and gas flow It is associated, such as electric current, voltage or power etc..

It is of course also possible to use baroceptor to detect flow parameter, such as air pressure.The situation that external environment condition is constant Under, in same air channel, pressure and the flow velocity of gas are inversely proportional to, and flow velocity and flow are directly proportional.It is to say, baroceptor is defeated Go out and be inversely proportional to by the population of test point.

At dust sensor timing signal, owing to population N of pressure P and sensor identification is inversely proportional to, dense in external dust N*P=constant when of spending certain, this constant is relevant to the actual dust concentration in current environment.

Generally sensor directly uses population N and mass density M to carry out curve fitting demarcation at timing signal, as mentioned above The method is owing to by airflow influence, accuracy can be lowered.The dust sensor that the present invention provides is using N*P at timing signal Carry out curve fitting with mass density M, flow relevant parameter is write body first in demarcating flow process.

Air pressure measured by baroceptor is inversely proportional to population, and therefore calibration coefficient can be according to equation (4) (5) determine, and the calibration coefficient determined is stored to the memorizer of dust sensor, in order to root during detection dust concentration Dust concentration (concentration of such as PM2.5) is calculated according to equation (6).

Flow relevant parameter is write in demarcation flow process by the present invention in advance.In time can be to sensing while changes in flow rate The parameter of device is modified, thus overcomes the problem that sensor is easily subject to the impact of external air flow.Simultaneously because flow passes The life and reliability of sensor and baroceptor is well beyond normally used DC fan, thus reduces sensor to wind The requirement of machine stability, and improve life-span and the stability in use of dust sensor.

Correspondingly, the present invention also provides for a kind of household electrical appliance, and described household electrical appliance include above-mentioned dust sensor.

It addition, the present invention also provides for the caliberating device of a kind of dust sensor, described caliberating device includes: above-mentioned dust passes Sensor 120, detects the flow parameter in the population of dust at n fixed point and described dust sensor 120；Regulator Device 130, the dust concentration of n fixed point of detection；Processor 140, with described dust sensor 120 and described reference instrument 130 Connect, determine demarcation system according to the population of the above-mentioned dust at all fixed points, described flow parameter and described dust concentration Number.So it can be avoided that the air-flow impact on result, improve the accuracy of dust sensor.

About the detail of caliberating device of dust sensor and benefit and the above-mentioned demarcation side for dust sensor Method details and benefit are identical, repeat no more in this.

The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality Execute the detail in mode, in the technology concept of the present invention, technical scheme can be carried out multiple letter Monotropic type, these simple variant belong to protection scope of the present invention.

It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, at not lance In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to various can The compound mode of energy illustrates the most separately.

Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as it is without prejudice to this The thought of invention, it should be considered as content disclosed in this invention equally.

Claims (13)

1. a dust sensor, it is characterised in that described dust sensor includes:

Device for detecting particles, the population of dust to be measured in detection air-flow；

Airflow detecting device, is arranged on the position that described air-flow passes through, and detects flow parameter；And

Processing means, is connected with described device for detecting particles and described airflow detecting device, according to described population and described gas Stream parameter determines dust concentration.

Dust sensor the most according to claim 1, it is characterised in that described airflow detecting device is arranged in air channel, Wherein, the air-flow of dust content to be measured circulates in described air channel.

Dust sensor the most according to claim 1, it is characterised in that described airflow detecting device be flow transducer or Baroceptor.

Dust sensor the most according to any one of claim 1 to 3, it is characterised in that described flow parameter is following One in Xiang: gas flow, gas pressure and the electrical quantity of described airflow detecting device in described dust sensor.

5. household electrical appliance, it is characterised in that described household electrical appliance include the dust according to any one of Claims 1-4 Sensor.

6. the scaling method of a dust sensor, it is characterised in that described scaling method includes:

Select n fixed point；

The air-flow ginseng in population Ni of dust, dust concentration Mi and described dust sensor is obtained for each fixed point Number Xi, wherein i=1,2 ..., n；And

Determine that described dust senses according to the population of described dust, dust concentration and the flow parameter at all fixed points The calibration coefficient of device.

Scaling method the most according to claim 6, it is characterised in that determine the calibration coefficient bag of described dust sensor Include: carry out method of least square for the population of described dust, dust concentration and the flow parameter at all fixed points linear Matching is to obtain described calibration coefficient.

Scaling method the most according to claim 7, it is characterised in that in the population of described flow parameter Yu described dust In the case of being directly proportional, the calibration coefficient obtained is:

$a=\frac{\left(\mathrm{\Σ}{(Ni/Xi)}^2\right)\left(\mathrm{\Σ}Mi\right)-\left(\mathrm{\Σ}\right(Ni/Xi\left)\right(\mathrm{\Σ}(Ni/Xi)Mi)}{n*\left(\mathrm{\Σ}{(Ni/Xi)}^2\right)-{\left(\mathrm{\Σ}\right(Ni/Xi\left)\right)}^2},$

$b=\frac{(n*\mathrm{\Σ}Mi(Ni/Xi\left)\right)-\left(\mathrm{\Σ}\right(Ni/Xi\left)\right)\left(\mathrm{\Σ}Mi\right)}{n*\left(\mathrm{\Σ}{(Ni/Xi)}^2\right)-{\left(\mathrm{\Σ}\right(Ni/Xi\left)\right)}^2}.$

Scaling method the most according to claim 8, it is characterised in that dust concentration based on described calibration coefficient is: M= A*N/X+b,

Wherein, N is the population of the dust measured by described dust sensor, and X is the flow parameter in dust sensor.

Scaling method the most according to claim 7, it is characterised in that at the particle of described flow parameter Yu described dust In the case of number is inversely proportional to, the calibration coefficient obtained is:

$a=\frac{\left(\mathrm{\Σ}{(Ni*Xi)}^2\right)\left(\mathrm{\Σ}Mi\right)-\left(\mathrm{\Σ}\right(Ni*Xi\left)\right(\mathrm{\Σ}(Ni*Xi)Mi)}{n*\left(\mathrm{\Σ}{(Ni*Xi)}^2\right)-{\left(\mathrm{\Σ}\right(Ni*Xi\left)\right)}^2},$

$b=\frac{(n*\mathrm{\Σ}Mi(Ni*Xi\left)\right)-\left(\mathrm{\Σ}\right(Ni*Xi\left)\right)\left(\mathrm{\Σ}Mi\right)}{n*\left(\mathrm{\Σ}{(Ni*Xi)}^2\right)-{\left(\mathrm{\Σ}\right(Ni*Xi\left)\right)}^2}.$

11. scaling methods according to claim 10, it is characterised in that dust concentration based on described calibration coefficient is: M =a*N*X+b,

Wherein, N is the population of the dust measured by described dust sensor, and X is the flow parameter in dust sensor.

12. according to the scaling method according to any one of claim 6 to 11, it is characterised in that described flow parameter is following One in Xiang: gas flow, gas pressure and the electrical quantity of described airflow detecting device in described dust sensor.

The caliberating device of 13. 1 kinds of dust sensors, it is characterised in that described caliberating device includes:

Dust sensor according to any one of Claims 1-4, detects population and the institute of dust at n fixed point State the flow parameter in dust sensor；

Reference instrument, the dust concentration of n fixed point of detection；

Processor, is connected with described dust sensor and described reference instrument, according to the grain of the above-mentioned dust at all fixed points Subnumber, described flow parameter and described dust concentration determine calibration coefficient.