CN104198349B - Dust investigating and dust detection method - Google Patents
Dust investigating and dust detection method Download PDFInfo
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- CN104198349B CN104198349B CN201410476778.XA CN201410476778A CN104198349B CN 104198349 B CN104198349 B CN 104198349B CN 201410476778 A CN201410476778 A CN 201410476778A CN 104198349 B CN104198349 B CN 104198349B
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- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention relates to a kind of dust investigating and dust detection method.Wherein, described dust investigating, comprising: luminescence component, and it sends detection light; Sense channel, it is arranged in the light path of described detection light, irradiates the dust suspension entered via the convection current blow vent of sense channel in sense channel to make detection light; Light-receiving module, the optical axis of its optical axis and luminescence component is predetermined angle, is the scattered beam of predetermined angle, and generates corresponding electric signal according to the light signal of scattered beam to receive what detect that light scatters via dust suspension with the optical axis of luminescence component; Control circuit, it is connected with luminescence component and light-receiving module, for driving luminescence component, and receives the electric signal of light-receiving module transmission, and calculates the dust concentration in sense channel according to electric signal.Volume of the present invention is little, low in energy consumption, cost is low, it is convenient to apply, and accuracy of detection is high.
Description
Technical field
The present invention relates to a kind of sensor technology, particularly relate to a kind of dust investigating and dust detection method.
Background technology
Economic development, living standard improves constantly, but environmental pollution is more and more serious, and in air, dust suspension concentration significantly increases, and the frequency of haze weather is also in rising.PM2.5 (diameter is less than the finely ground particles of 2.5um) is wherein closely bound up with health, directly results in the significantly rising of the various breathing problem incidence of disease.In view of the continuous deterioration of air quality, air purifying process and purification of air series products obtain swift and violent development, the numerical value of people to PM2.5 is also more and more paid close attention to simultaneously, this just needs a high-precision dust investigating to embody dust concentration situation in air intuitively, to determine whether to need to purify room air, or whether the environment assessed residing for oneself is applicable to carrying out some activity.
There is a kind of device adopting the mode of suction-type spectral scan to detect current market.The accuracy of detection of this dust investigating is high, and distinguishable go out the concentration of different-diameter particle, but high cost, is only limitted to special measurement equipment use, is not suitable for civilian in enormous quantities.
Summary of the invention
In view of the above problems, propose the present invention so that provide a kind of to overcome the problems referred to above or the dust investigating solved the problem at least in part and dust detection method, reduce costs when to ensure accuracy of detection.
According to first aspect of the present invention, provide a kind of dust investigating, comprising:
Luminescence component, described luminescence component sends detection light;
Sense channel, described sense channel is arranged in the light path of described detection light, irradiates the dust suspension entered via the convection current blow vent of described sense channel in described sense channel to make described detection light;
Light-receiving module, the optical axis of described light-receiving module and the optical axis of described luminescence component are predetermined angle, be the scattered beam of described predetermined angle with what receive that described detection light scatters via described dust suspension with the optical axis of described luminescence component, and generate corresponding electric signal according to the light signal of described scattered beam;
Control circuit, described control circuit is connected with described luminescence component and described light-receiving module respectively, for receiving the described electric signal that described light-receiving module sends, and calculates the dust concentration in described sense channel according to described electric signal.
According to second aspect of the present invention, provide a kind of dust detection method, comprising:
Luminescence component sends detection light, enters the dust suspension in described sense channel with the convection current blow vent irradiated via sense channel;
What light-receiving module received that described detection light scatters via described dust suspension is the scattered beam of predetermined angle with the optical axis of described luminescence component, and wherein, the optical axis of described light-receiving module and the optical axis of described luminescence component are described predetermined angle;
Described light-receiving module generates corresponding electric signal according to the light signal of described scattered beam;
Control circuit receives the described electric signal that described light-receiving module sends;
Described control circuit, according to described electric signal, calculates the dust concentration in described sense channel.
By technique scheme, the technical scheme that the embodiment of the present invention provides at least has following advantages:
The technical scheme that the embodiment of the present invention provides is made up of luminescence component and light-receiving module setting, and the optical axis of the optical axis of light-receiving module and described luminescence component is the light channel structure of predetermined angle, achieve based on optical detection principle, according to the power of described scattered beam, calculate the dust concentration in described sense channel.It can thus be appreciated that the technical scheme that the embodiment of the present invention provides is light principle due to what adopt, and compared with the device of existing structure, its volume is little, and cost is low, is easy to carry, and low in energy consumption; In addition, the technical scheme that the embodiment of the present invention provides is based on the principle of optical scattering, and its accuracy of detection is high.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of instructions, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present invention.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred implementation, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.In the accompanying drawings:
Fig. 1 shows the structural representation of the dust investigating that the embodiment of the present invention one provides;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 shows the structural representation of control circuit in a kind of dust investigating that the present embodiment one provides;
Fig. 4 shows the fundamental diagram of a kind of dust investigating that the present embodiment one provides;
Fig. 5 shows the schematic flow sheet of a kind of dust detection method that the present embodiment two provides.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1,2 and 3, the embodiment of the present invention one provides the structural representation of dust investigating.As shown in Figure 1, described dust investigating comprises: luminescence component 1, sense channel 2, light-receiving module 3 and control circuit 4 (as described in Fig. 2 and Fig. 3).Wherein, described luminescence component 1 sends detection light.Described sense channel 2 is arranged in the light path of described detection light, irradiates the dust suspension entered via the convection current blow vent of described sense channel 2 in described sense channel 2 to make described detection light.The optical axis of described light-receiving module 3 and the optical axis of described luminescence component 1 are predetermined angle, be the scattered beam of described predetermined angle with what receive that described detection light scatters via described dust suspension with the optical axis of described luminescence component 1, and generate corresponding electric signal according to the light signal of described scattered beam.Described control circuit 4 is connected with described luminescence component 1 and described light-receiving module 3 respectively, for driving described luminescence component, and receives the described electric signal of described light-receiving module 3 transmission, and calculates the dust concentration in described sense channel according to described electric signal.
The technical scheme that the present embodiment provides is made up of luminescence component and light-receiving module setting, and the optical axis of the optical axis of light-receiving module and described luminescence component is the light channel structure of predetermined angle, achieve based on optical detection principle, according to the power of described scattered beam, calculate the dust concentration in described sense channel.It can thus be appreciated that the technical scheme that the present embodiment provides is light principle due to what adopt, and compared with the device of existing structure, its volume is little, and cost is low, is easy to carry, and low in energy consumption; In addition, the technical scheme that the present embodiment provides is based on the principle of optical scattering, and its accuracy of detection is high.
Wherein, the predetermined angle described in above-described embodiment can be 100 ~ 140 degree.Illustrated in Fig. 1 that described predetermined angle is the situation of 120 degree, in fact, the setting of described predetermined angle can according to each device, and the physical characteristics as luminescence component, light-receiving module etc. sets, and the present embodiment is not construed as limiting this.
Further, as shown in Figure 1, luminescence component described in above-described embodiment one can adopt following structure to realize.Described luminescence component 1 comprises: luminophor 11 and light emission lens 12.Wherein, described luminophor 11 sends Infrared.Described light emission lens 12 is arranged on the light emission side of described luminophor 11, is converted to directional light for the light sent by described luminophor 11.Wherein, described directional light is described luminescence component 1 and sends detection light, and the optical axis of described light emission lens 12 is the optical axis of described luminescence component 1.Fig. 1 illustrate only a kind of specific implementation of described luminescence component, and in the specific implementation, described luminescence component also can adopt other structure to realize, and such as, the structure be made up of luminophor and multiple lens, the present embodiment does not do concrete restriction to this.
Further, as shown in Figure 1, described light-receiving module 3 can adopt following structure to realize.Described light-receiving module 3 comprises: sensitive lens 32 and sensitive device 31.Wherein, described sensitive lens 32 is for converging being received from described detection light as converged light via the scattered beam that described dust suspension scatters.Described sensitive device 31 is arranged on the focal position place of described sensitive lens, for receiving described converged light, and according to the light signal of described converged light, generates corresponding electric signal.Wherein, the optical axis of described sensitive lens 32 is the optical axis of described light-receiving module 3.
From said structure, shown in composition graphs 1 and Fig. 2, the principle of work of the described dust investigating that the present embodiment provides is as follows:
Luminescent device 1, under the driving of control circuit 4, sends non-visible Infrared (namely detecting light).The light emission lens 12 of this non-visible Infrared on optical module 7 becomes directional light, directive sense channel 2.When there being the dust of suspension in sense channel, this dust can form scattering to light.Wherein partial dispersion light (namely the optical axis of its optical axis and described luminescence component is the scattered beam of described predetermined angle) directive sensitive lens 32.Scattered beam focuses on through sensitive lens 32, and by light collection on sensitive device 31, light signal is converted to electric signal and carries out follow-up signal transacting and computing for control circuit by sensitive device 31.
Further, the described electric signal generated according to light signal due to sensitive device is fainter, can not meet the demand of subsequent arithmetic, therefore control circuit needs to process it after receiving described electric signal, and then carries out follow-up calculating according to the signal after process.As shown in Figure 3, the control circuit described in above-described embodiment one, can adopt following structure to realize.Concrete, described control circuit 4 comprises: driving circuit 5, amplifying circuit 41 and processor 42.Wherein, described driving circuit 5 is connected with luminescence component, sends described detection light for driving described luminescence component.Described amplifying circuit 41 is connected with light-receiving module, amplifies for the described electric signal generated described light-receiving module.Concrete, as shown in Figure 3, described amplifying circuit 41 is connected with the sensitive device 31 of described light-receiving module.Described processor 42 is connected with described driving circuit and described amplifying circuit 41 respectively, and for controlling described driving circuit, and detect the described electric signal after amplifying, the algorithm that employing is preset calculates the dust concentration in described sense channel 2.During specific embodiment, described amplifier 41 specifically can adopt high precision operating amplifier, or also can adopt multistage amplifier circuit to realize.Described processor 42 can be selected microprocessor to realize.
Further, as shown in Figure 3, described control circuit 4 can also comprise: filtering circuit 43.Described filtering circuit 43 is arranged between described amplifying circuit 41 and described processor 42, for carrying out filtering process to the described electric signal after amplification.Accordingly, described processor is connected with described amplifying circuit 41 by described filtering circuit 43 by 42, specifically for according to the described electric signal after filtering process, adopts the algorithm preset to calculate dust concentration in described sense channel.The present embodiment, can effectively filtering external disturbance by arranging described filtering circuit, ensure that the authenticity of signal.Wherein, when specific embodiment, described filtering circuit 43 can be specially filter capacitor.
Further, as shown in Figure 3, described control circuit 4 can also comprise: adjustment potentiometer 44.Described adjustment potentiometer 44 is arranged among described amplifying circuit, for carrying out amplifier gain compensation to described electric signal.The present embodiment achieves the compensation of amplifier gain by arranging described adjustment potentiometer 44, eliminate components and parts inconsistency to the impact of testing result.
Here you need to add is that: the processor described in described dust investigating that the present embodiment provides can adopt the mode of standard serial port communication to export result of calculation.The described processor that the present embodiment provides calculates dust concentration can utilize optical detection principle, according to the power of reflection ray, obtains the electric signal with dust concentration linear correlation.The linear relationship of described electric signal and described dust concentration can be pre-determined by staff and store, after described processor receives the electric signal of described light-receiving module transmission, namely described processor by the linear relationship of described electric signal and described dust concentration, obtains the described dust concentration that described electric signal is corresponding.Certainly, described processor obtains described dust concentration except adopting the mode of linear search, also according to the calculation procedure be pre-configured in described processor, can calculate dust concentration.
Here it should be noted that: the detection light that the luminescence component described in above-described embodiment sends can be pulse light.Thus, further, the control circuit 4 described in described dust investigating that provides of above-described embodiment is also for sending the pulse signal of preset length by setpoint frequency.Described driving circuit 5 also for receiving the described pulse signal that described control circuit 4 sends, and drives described luminescence component 1 to send pulse light according to described pulse signal.When specific embodiment, described driving circuit 5 can be power tube.Described power tube is connected with the luminophor in described luminescence component 1.Described power tube is connected with the processor 42 in described control circuit 4.Wherein, described pulse light is as described detection light.
Fig. 4 shows the fundamental diagram of the described dust investigating that the present embodiment one provides.As can be seen from Figure 4, the processor 42 in described control circuit 4 is pressed setpoint frequency and is sent the pulse signal of preseting length, drives driving circuit 5, controls luminescent device 1 send pulse light and be irradiated to dust suspension in sense channel by driving circuit 5.The light signal received is converted to electric signal by sensitive device 3, after amplifying circuit 41 amplifies, turns back to processor 42.Processor 42, to collected signal, by software algorithm process, exports dust concentration signal in the mode of standard serial port.Storer is also show, EEPROM in Fig. 4.By arranging described storer, the soot density calculated can refer to deposit in which memory by described processor, uses in order to subsequent calculations.
Wherein, the power supply input of described control circuit and the output of rs 232 serial interface signal are integrated in the connector 6 of six pins, simplify the connection with governor circuit, easy to use.Whole control circuit 4 working current is no more than 20mA, meets the user demand of low power consuming devices completely.
The setpoint frequency that described processor sends pulse signal can set according to the parameter characteristic of used components and parts.Such as, described setpoint frequency can send a pulse signal for every 10ms.The length of described pulse signal can be 320ns.The luminophor in luminescence component lighted by described processor driving driving circuit; And by setting sequential relationship, the setting duration (as 280ns) after sending pulse signal detects received voltage signal afterwards, the useful signal collected is asked for the mean value in 1s, and outwards sends data with the communication mode of standard serial port.
Further, as shown in Figure 2, Fig. 2 shows the structural representation of the described dust investigating of above-described embodiment.As shown in Figure 2, described dust investigating also comprises: pedestal 8 and screening cover 9.Here you need to add is that described screening cover 9 can be metallic shield lid.Adopt metallic shield lid energy fully filtering external disturbance, ensure that the authenticity of signal.Described pedestal 8 is provided with air hole (not shown).Described screening cover 9 is provided with air hole (not shown).Described luminescence component 1, described light-receiving module 3, described control circuit 4 are all arranged on described pedestal 8 that (processor 42 in described control circuit 4 shown in Fig. 2 is arranged on described pedestal, and six the connector 6 of pin be arranged on described pedestal, remaining is and illustrates).Described screening cover 9 is arranged on described pedestal 8, described luminescence component 1, described light-receiving module 3, described control circuit 4 is contained in accommodating cavity that described screening cover 9 and described pedestal 8 form.The air hole of described pedestal 8 and the air hole of described screening cover 9 form described sense channel 2.
Further, in order to ensure the measuring accuracy of dust measurement device, keep each parts not by the pollution, particularly optics of dust, pedestal described in above-described embodiment and be provided with sense channel wall between described screening cover.Air hole on air hole on described pedestal, described screening cover and described sense channel wall form described sense channel.Air hole on air hole on described pedestal, described screening cover is as the convection current blow vent of described sense channel.The light path of corresponding described detection light and the light-receiving optical path of described light-receiving module are equipped with transmittance section to described conduit wall, to make described detection light and described scattered beam can through described transmittance section.
By the design of said structure, each parts are all in the accommodation space of described pedestal and screening cover formation, each parts and external dust are kept apart, and then ensure that the measuring accuracy of dust investigating, and each electronic unit is not easily by the interference of dust.
Here also you need to add is that: processor described in the described dust investigating that above-described embodiment provides also is configured with parametric compensation correcting function program, can fully to ensure to dispatch from the factory the consistance of product by arranging this program.
As shown in Figure 5, the schematic flow sheet of dust detection method that provides of the embodiment of the present invention two.The described dust investigating that above-described embodiment one provides can realize the described method that the present embodiment two provides.Concrete, the method described in the present embodiment two, comprising:
Step 101, luminescence component send detection light, enter the dust suspension in described sense channel with the convection current blow vent irradiated via sense channel.
Wherein, described detection light can be specially pulse light.
Here it should be noted that: before above-mentioned steps 101, also comprise the steps:
Described control circuit sends the pulse signal of preset length by setpoint frequency;
Driving circuit receives the described pulse signal that described control circuit sends, and drives described luminescence component to send pulse light according to described pulse signal;
Wherein, described pulse light is as described detection light.Described setpoint frequency is that every 10ms sends a pulse signal, and described preset length is 320ns.
What step 102, light-receiving module received that described detection light scatters via described dust suspension is the scattered beam of predetermined angle with the optical axis of described luminescence component.
Wherein, the optical axis of described light-receiving module and the optical axis of described luminescence component are described predetermined angle.
Step 103, described light-receiving module generate corresponding electric signal according to the light signal of described scattered beam.
Step 104, control circuit receive the described electric signal that described light-receiving module sends.
Step 105, described control circuit, according to described electric signal, calculate the dust concentration in described sense channel.
When specific embodiment, this step can adopt following steps to realize:
First, described control circuit according to described electric signal, calculate the current dust concentration when advance into dust suspension in described sense channel.
Then, described control circuit sets all passing dust concentration calculated in the period before obtaining and receiving described electric signal.
Finally, to current dust concentration and all described passing dust concentration got, average.
Wherein, described mean value is as the described dust concentration entered in described sense channel.The described setting period can be 0.5s, 1s etc.
Enter the dust concentration in described sense channel described in the above-mentioned mode of averaging of the present embodiment employing calculates, effectively can improve the accuracy of detection of dust investigating.
Here you need to add is that: while the control circuit described in the present embodiment drives described luminescence component to send pulse light, also need the sequential relationship according to setting, setting duration (as 280ns) after sending pulse signal detects received voltage signal afterwards, the useful signal collected is asked for the mean value in 1s, and outwards send data with the communication mode of standard serial port.
The technical scheme that the present embodiment provides is made up of luminescence component and light-receiving module setting, and the optical axis of the optical axis of light-receiving module and described luminescence component is the light channel structure of predetermined angle, achieve based on optical detection principle, according to the power of described scattered beam, calculate the dust concentration in described sense channel.It can thus be appreciated that the technical scheme that the present embodiment provides is light principle due to what adopt, and compared with the device of existing structure, its volume is little, and cost is low, is easy to carry, and low in energy consumption; In addition, technical scheme provided by the invention is based on the principle of optical scattering, and its accuracy of detection is high.
Further, step 105 described in above-described embodiment, described control circuit, according to described electric signal, calculate the dust concentration in described sense channel, and following steps can be adopted to realize:
Step 1051, described electric signal to be amplified.
Step 1052, according to the described electric signal after amplifying, the algorithm preset is adopted to calculate dust concentration in described sense channel.
Further, the step 105 described in above-described embodiment, described control circuit, according to described electric signal, calculate the dust concentration in described sense channel, can also comprise the steps:
Step 1053, to amplify after described electric signal carry out filtering process.
Accordingly, described step 1052, described according to the described electric signal after amplifying, adopt the algorithm preset to calculate dust concentration in described sense channel, be specially:
According to the described electric signal after filtering process, the algorithm that employing is preset calculates the dust concentration in described sense channel.
Further, the step 105 described in above-described embodiment, described control circuit, according to described electric signal, calculate the dust concentration in described sense channel, can also comprise the steps:
Step 1054, amplifier gain compensation is carried out to described electric signal.
It should be noted that: for aforesaid each embodiment of the method, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in instructions all belongs to preferred embodiment, and involved action and module might not be that the present invention is necessary.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
Be understandable that, the correlated characteristic in said method and device can reference mutually.In addition, " first ", " second " in above-described embodiment etc. are for distinguishing each embodiment, and do not represent the quality of each embodiment.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the system of foregoing description, the specific works process of device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In instructions provided herein, describe a large amount of detail.But can understand, embodiments of the invention can be put into practice when not having these details.In some instances, be not shown specifically known method, structure and technology, so that not fuzzy understanding of this description.
Similarly, be to be understood that, in order to simplify the disclosure and to help to understand in each inventive aspect one or more, in the description above to exemplary embodiment of the present invention, each feature of the present invention is grouped together in single embodiment, figure or the description to it sometimes.But, the method for the disclosure should be construed to the following intention of reflection: namely the present invention for required protection requires feature more more than the feature clearly recorded in each claim.Or rather, as claims below reflect, all features of disclosed single embodiment before inventive aspect is to be less than.Therefore, the claims following embodiment are incorporated to this embodiment thus clearly, and wherein each claim itself is as independent embodiment of the present invention.
In addition, those skilled in the art can understand, although embodiments more described herein to comprise in other embodiment some included feature instead of further feature, the combination of the feature of different embodiment means and to be within scope of the present invention and to form different embodiments.Such as, in the following claims, the one of any of embodiment required for protection can use with arbitrary array mode.
The present invention will be described instead of limit the invention to it should be noted above-described embodiment, and those skilled in the art can design alternative embodiment when not departing from the scope of claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and does not arrange element in the claims or step.Word "a" or "an" before being positioned at element is not got rid of and be there is multiple such element.The present invention can by means of including the hardware of some different elements and realizing by means of the computing machine of suitably programming.In the unit claim listing some devices, several in these devices can be carry out imbody by same hardware branch.Word first, second and third-class use do not represent any order.Can be title by these word explanations.
Claims (13)
1. a dust investigating, is characterized in that, comprising:
Luminescence component, described luminescence component sends detection light;
Sense channel, described sense channel is arranged in the light path of described detection light, irradiates the dust suspension entered via the convection current blow vent of described sense channel in described sense channel to make described detection light;
Light-receiving module, the optical axis of described light-receiving module and the optical axis of described luminescence component are predetermined angle, be the scattered beam of described predetermined angle with what receive that described detection light scatters via described dust suspension with the optical axis of described luminescence component, and generate corresponding electric signal according to the light signal of described scattered beam;
Control circuit, described control circuit is connected with described luminescence component and described light-receiving module respectively, for driving described luminescence component, and receive the described electric signal of described light-receiving module transmission, and enter dust concentration in described sense channel according to described electric signal calculating;
Described device also comprises:
Pedestal, which is provided with air hole;
Screening cover, described screening cover is provided with air hole;
Wherein, described luminescence component, described light-receiving module, described control circuit are all arranged on described pedestal;
Described screening cover is arranged on described pedestal, is contained in the accommodating cavity of described screening cover and described pedestal formation by described luminescence component, described light-receiving module, described control circuit;
The air hole of described pedestal and the air hole of described screening cover form described sense channel;
Sense channel wall is provided with between described pedestal and described screening cover;
Air hole on air hole on described pedestal, described screening cover and described sense channel wall form described sense channel;
Air hole on air hole on described pedestal, described screening cover is as the convection current blow vent of described sense channel;
The light path of corresponding described detection light and the light-receiving optical path of described light-receiving module are equipped with transmittance section to described conduit wall, to make described detection light and described scattered beam can through described transmittance section.
2. dust investigating according to claim 1, is characterized in that, described predetermined angle is 100 ~ 140 degree.
3. dust investigating according to claim 1 and 2, is characterized in that, described luminescence component comprises:
Luminophor, it sends Infrared;
Light emission lens, it is arranged on the light emission side of described luminophor, is converted to directional light for the light sent by described luminophor;
Wherein, described directional light is described luminescence component and sends detection light, and the optical axis of described light emission lens is the optical axis of described luminescence component.
4. dust investigating according to claim 1 and 2, is characterized in that, described light-receiving module comprises:
Sensitive lens, for converging as converged light by being received from described detection light via the scattered beam that described dust suspension scatters;
Sensitive device, it is arranged on the focal position place of described sensitive lens, for receiving described converged light, and according to the light signal of described converged light, generates corresponding electric signal;
Wherein, the optical axis of described sensitive lens is the optical axis of described light-receiving module.
5. dust investigating according to claim 1 and 2, is characterized in that, described control circuit, comprising:
Driving circuit, described driving circuit is connected with luminescence component, sends described detection light for driving described luminescence component;
Amplifying circuit, described amplifying circuit is connected with light-receiving module, amplifies for the described electric signal generated described light-receiving module;
Processor, described processor is connected with described driving circuit and described amplifying circuit respectively, for controlling described driving circuit, and detects the described electric signal after amplifying, and adopts the algorithm preset to calculate the dust concentration entered in described sense channel.
6. dust investigating according to claim 5, is characterized in that, described control circuit, also comprises:
Filtering circuit, described filtering circuit is arranged between described amplifying circuit and described processor, for carrying out filtering process to the described electric signal after amplification;
Accordingly, described processor is connected with described amplifying circuit by described filtering circuit, specifically for according to the described electric signal after filtering process, adopts the algorithm preset to calculate the dust concentration entered in described sense channel.
7. dust investigating according to claim 6, is characterized in that, described control circuit, also comprises:
Adjustment potentiometer, described adjustment potentiometer is arranged among described amplifying circuit, for carrying out amplifier gain compensation to described electric signal.
8. dust investigating according to claim 5, is characterized in that,
Described processor, also for sending the pulse signal of preset length by setpoint frequency;
Described driving circuit, also for receiving the described pulse signal that described control circuit sends, and drives described luminescence component to send pulse light according to described pulse signal;
Wherein, described pulse light is as described detection light.
9. a dust detection method, is characterized in that, comprising:
Luminescence component sends detection light, enters the dust suspension in described sense channel with the convection current blow vent irradiated via sense channel;
What light-receiving module received that described detection light scatters via described dust suspension is the scattered beam of predetermined angle with the optical axis of described luminescence component, and wherein, the optical axis of described light-receiving module and the optical axis of described luminescence component are described predetermined angle;
Described light-receiving module generates corresponding electric signal according to the light signal of described scattered beam;
Control circuit receives the described electric signal that described light-receiving module sends;
Described control circuit, according to described electric signal, calculates the dust concentration entered in described sense channel;
Described luminescence component also comprises before sending and detecting light:
Described control circuit sends the pulse signal of preset length by setpoint frequency;
Described luminescence component sends detection light and comprises:
Driving circuit receives the described pulse signal that described control circuit sends, and drives described luminescence component to send pulse light according to described pulse signal;
Wherein, described pulse light is as described detection light;
Described control circuit, according to described electric signal, calculates the dust concentration entered in described sense channel and comprises:
Described control circuit, according to described electric signal, calculates the current dust concentration when advancing in described sense channel;
The all passing dust concentration calculated in the setting period before described control circuit obtains and receives described electric signal;
To current dust concentration and all described passing dust concentration got, average;
Wherein, described mean value is as the described dust concentration entered in described sense channel.
10. method according to claim 9, is characterized in that, described control circuit, according to described electric signal, calculates and enters dust concentration in described sense channel, comprising:
Described electric signal is amplified;
According to the described electric signal after amplification, adopt the algorithm preset to calculate and enter dust concentration in described sense channel.
11. methods according to claim 10, is characterized in that, described control circuit, according to described electric signal, calculates and enters dust concentration in described sense channel, also comprise:
Filtering process is carried out to the described electric signal after amplifying;
Accordingly, described according to the described electric signal after amplification, adopt the algorithm preset to calculate and enter dust concentration in described sense channel, be specially:
According to the described electric signal after filtering process, adopt the algorithm preset to calculate and enter dust concentration in described sense channel.
12. methods according to claim 10 or 11, is characterized in that, described control circuit, according to described electric signal, calculates the dust concentration of the gas entered in described sense channel, also comprises:
Amplifier gain compensation is carried out to described electric signal.
13. methods according to claim 9, is characterized in that, described setpoint frequency is that every 10ms sends a pulse signal, and described preset length is 320ns.
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