CN104132875A - Outdoor solar dust concentration measuring device - Google Patents
Outdoor solar dust concentration measuring device Download PDFInfo
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- CN104132875A CN104132875A CN201410385487.XA CN201410385487A CN104132875A CN 104132875 A CN104132875 A CN 104132875A CN 201410385487 A CN201410385487 A CN 201410385487A CN 104132875 A CN104132875 A CN 104132875A
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- 239000000428 dust Substances 0.000 title claims abstract description 139
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 10
- 101150080085 SEG1 gene Proteins 0.000 claims description 3
- 101100421134 Schizosaccharomyces pombe (strain 972 / ATCC 24843) sle1 gene Proteins 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000008187 granular material Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
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Abstract
The invention relates to an outdoor solar dust concentration measuring device and belongs to the technical field of environmental measurement. An A/D conversion circuit is positioned at the bottom right part of a dust concentration sensor and connected with the dust concentration sensor, and a singlechip module is mounted in the middle of the inner part of the equipment and connected with the A/D conversion circuit. A storage battery is mounted on the right side of the inner part of the equipment and connected with a solar cell plate, the dust concentration sensor and the singlechip module, and a digital display module is arranged at the outer part of the equipment and connected with the singlechip module. An equipment switch is arranged under the right side of the outer part of the equipment and connected with the singlechip module, the solar cell plate is connected with a support through a movable rotation shaft, and fixing holes are formed in the lower part and the back surface of the support. The outdoor solar dust concentration measuring device overcomes the defects of a traditional dust concentration monitoring equipment, has the advantages of small size, low cost, energy saving, environmental protection, easiness and convenience in use and convenience in mounting, and can monitor the dust concentration in air and visually display the dust concentration through the digital display module.
Description
Technical field
The present invention relates to a kind of outdoor sun power dust concentration measurement mechanism, belong to environment measurement technical field.
Background technology
Along with society and economic development, people more and more recognize the seriousness of haze weather, currently all there is haze phenomenon in densely populated comparatively concentrated city, not only occurrence frequency is high and the duration is long, people healthy caused to serious harm, especially suffered from the responsive crowd such as patient of respiratory disease.
Although official has started to forecast air quality, but be only shown as " slight pollution " or " intermediate pollution ", cannot allow people see intuitively concrete numeral, and need to arrive official site's inquiry, bring inconvenience to the elderly.Therefore need a kind of can the crowd is dense out of doors area can real-time query to the equipment of dust concentration.Current domestic dust concentration measuring equipment is applied in heavily contaminated operating environments such as detecting colliery, flour mill and textile mills conventionally, adopt vacuum photomultiplier light activated element, exist volume large, heavy, need high pressure servosupply circuit, complex structure, shortcoming that cost is high, be not suitable for use in outdoor detection.
Summary of the invention
The invention provides a kind of outdoor sun power dust concentration measurement mechanism, high for solving existing dust concentration measuring equipment cost, complex process, the excessive problem with inquiring about in time current dust concentration of volume.
Technical scheme of the present invention is: a kind of outdoor sun power dust concentration measurement mechanism, comprises inlet (dust contained gas) 1, digital display module 2, accumulator 3, dust outlet 4, one-chip computer module 5, facility switching 6, movable rotation-shaft 7, solar panel 8, support 9, A/D change-over circuit 10, air outlet 11, fixed orifice 12, dust concentration sensor 13;
Described dust concentration sensor 13 is placed in device interior left side, inlet (dust contained gas) 1 is connected to dust concentration sensor 13 tops, dust outlet 4 is connected to dust concentration sensor 13 left sides, air outlet 11 is connected to dust concentration sensor 13 belows, A/D change-over circuit 10 is positioned at dust concentration sensor 13 lower rights and is connected with dust concentration sensor 13, one-chip computer module 5 is arranged in the middle of device interior and is connected with left side A/D change-over circuit 10, accumulator 3 be arranged on device interior right side and with solar panel 8, dust concentration sensor 13, one-chip computer module 5 is connected, numeral display module 2 is placed in device external and is connected with one-chip computer module 5, facility switching 6 is placed in below, device external right side and is connected with one-chip computer module 5, solar panel 8 is connected with support 9 by movable rotation-shaft 7, there is fixed orifice 12 at the below of support 9 and the back side,
Described dust concentration sensor 13 inside comprise that dust laden air enters mouth 14, transparent pipeline 15, light source 16, hollow out pipeline 17, dust laden air and goes out mouth 18, dust discharge line 19, filtrator 20, micro-suction pump 21, darkroom 25, and described darkroom 25 comprises lens 22, detector 23, Bas Discharged pipeline 24, wherein dust laden air enters mouth 14 tops and is connected with inlet (dust contained gas) 1, dust laden air enters mouth 14 bottoms and is connected with hollow out pipeline 17 with transparent pipeline 15, transparent pipeline 15 and hollow out pipeline 17 nest together and hollow out pipeline 17 is positioned at inner side, light source 16 is arranged on the right side of transparent pipeline 15, transparent pipeline 15 goes out mouth 18 tops with hollow out pipeline 17 belows and dust laden air and is connected, dust laden air goes out mouth 18 bottoms and is connected with filtrator 20, filtrator 20 left sides are connected with micro-suction pump 21, micro-suction pump 21 is connected with dust discharge line 19 one end again, dust discharge line 19 other ends are connected with dust outlet 4, filtrator 20 belows are connected with darkroom 25, lens 22 are arranged on 25 tops, darkroom and lens 22 and face dust laden air and go out mouth 18, light source 16 is arranged on lens 22 right sides, detector 23 is arranged on lens 22 belows, Bas Discharged pipeline 24 is connected to below, darkroom and is connected with air outlet 11.
Described detector 23 comprises Pin photosensitive tube, operational amplifier A D549, feedback resistance Rf, capacitor C f; Wherein one end of Pin photosensitive tube is extremely connected and ground connection with operational amplifier A D549 "+", and the other end is connected with capacitor C f; Capacitor C f mono-termination Pin photosensitive tube, the other end is connected with the output terminal of operational amplifier A D549; Feedback resistance Rf one end is extremely connected with operational amplifier A D549 "-", and the other end is connected with the line between capacitor C f and the output terminal of operational amplifier A D549; Operational amplifier A D549 meets supply voltage Vs, and output terminal output voltage V 0 is connected with the port 25 of A/D converter ADC0832 in A/D change-over circuit 10.
Described A/D change-over circuit 10 comprises resistance R 1, the A/D converter ADC0832 of 1 kilo-ohm; Wherein the positive pole of dust concentration sensor 13 is connected with power supply, the negative pole of dust concentration sensor 13 is connected with resistance R 1, the other end ground connection of resistance R 1, the port 25 of A/D converter ADC0832 is connected with the line of resistance R 1 with dust concentration sensor 13, port 27 ground connection of A/D converter ADC0832, the port 29 of A/D converter ADC0832 is connected with the P1.2 of one-chip computer module 5, one-chip computer module 5
/ VP end is connected with power supply.
Described digital display module 2 comprises 8D latch 74LS373, digital indicator ARK SR 410561K, resistance R 6, R7, R8, R9, R10, R11, R12, the R13 of 10 kilo-ohms, resistance R 2, R3, R4, the R5 of 1 kilo-ohm, NPN type triode T1, T2, T3, T4; Wherein P0.0 ~ P0.7 pin of one-chip computer module 5 and 1D ~ 8D port of 8D latch 74LS373 are connected; Resistance R 6, R7, R8, R9, R10, R11, R12, R13 mono-end are connected on power supply, and the other end is connected on respectively on the line between P0.0 ~ P0.7 and 1D ~ 8D; 8D latch 74LS373's
end ground connection, G termination power, 1Q ~ 8Q is connected with a, b, c, d, e, f, g, the dp end of digital indicator ARK SR 410561K respectively; SEG1 ~ SEG4 of digital indicator ARK SR 410561K is connected with the emitter of NPN type triode T1, T2, T3, T4 respectively, the base stage of NPN type triode T1, T2, T3, T4 is connected on the P2.0 ~ P2.3 of one-chip computer module 5 after being connected with resistance R 2, R3, R4, R5 respectively, the collector of NPN type triode T1, T2, T3, T4 connects power supply.
Described one-chip computer module 5 is AT89C51.
Principle of work of the present invention is:
When use, support 9 use bolts are fixed through fixed orifice 12, regulate movable rotation-shaft 7 to make solar panel 8 towards sunlight as shown in Figure 1 on the right portion, solar panel 8 outside device is that power storage is in accumulator 3 by light energy conversion, after opening device switch 6, install outside dust laden air is inhaled into dust laden air by inlet (dust contained gas) 1 and enters mouth 14 under the suction of micro-suction pump 21, in the time that dust laden air passes through hollow out pipeline 17, the light that light source 16 sends sees through transparent pipeline 15 and meets at right angles with hollow out pipeline 17, an intersection point light sensitive area that zonule is measuring system around, having formed the higher and more uniform photosensitive area of optical power density irradiates dust particle by hollow out pipeline 17 (this principle is thought and is studded with the gasoloid of solid particle in dust laden air, out-of-date when carrying the air stream of dust, the light wave that light source 16 sends incides after the measured zone with dust, blocked by dust granules thing, can occur to absorb and scattering, thereby make the light intensity decreasing of light on the original direction of propagation).
Dust laden air goes out mouth 18 by dust laden air and enters into filtrator 20, air after filtration enters in darkroom 25, the scattered light that dust produces is converged on detector 23 by lens 22, there is certain proportionate relationship in the particle diameter of the scattered light intensity receiving and tested dust granules thing and concentration, the scattered light being produced by dust granule becomes the pulse voltage signal of respective amplitude through opto-electronic conversion, utilize fast response time, the Pin photosensitive tube that leakage current is very little under low bias voltage converts scattered light signal to electric signal (because the signal after opto-electronic conversion is extremely faint, therefore need by amplifier, the signal obtaining is processed and amplified.Because electric signal is directly proportional to scattered light intensity, therefore the power of electric signal and the particle diameter of dust and concentration are proportional).
This signal is input in one-chip computer module 5 after simulating signal being converted to digital signal by A/D change-over circuit 10, one-chip computer module 5 calculates the concentration of dust and result is input on digital display module 2 and is shown, dust in dust laden air is extracted out and is delivered to dust outlet 4 through dust discharge line 19 and discharge by micro-suction pump 21, and the air that enters darkroom is delivered to air outlet 11 by Bas Discharged pipeline 24 and discharged.
(the Liu Yin etc. that delivered, " design of SCM Based dust detection system ", coal mine machinery, 2011.7) paper, in literary composition, mention " change scattered light intensity into electric signal; thus calculate the relative mass concentration of dust by AT89C51 single-chip data acquisition system pick-up transducers signal, and directly show by liquid crystal display ".It is visible that to utilize calculating and the processing that single-chip microcomputer carries out dust concentration be common using method of the prior art.
The invention has the beneficial effects as follows: the shortcoming that has overcome traditional dust concentration monitoring equipment, have advantages of that volume is little, with low cost, energy-conserving and environment-protective, easy to use, convenient installation, can monitor in real time airborne dust concentration, and show intuitively by digital display module.
Brief description of the drawings
Fig. 1 is structured flowchart of the present invention;
Fig. 2 is dust concentration sensor construction schematic diagram of the present invention;
Fig. 3 is detector circuit schematic diagram of the present invention;
Fig. 4 is A/D change-over circuit schematic diagram of the present invention;
Fig. 5 is digital display module circuit theory diagrams of the present invention;
Each label in figure: 1 is inlet (dust contained gas), 2 is digital display module, 3 is accumulator, 4 is dust outlet, 5 is one-chip computer module, 6 is facility switching, 7 is movable rotation-shaft, 8 is solar panel, 9 is support, 10 is A/D change-over circuit, 11 is air outlet, 12 is fixed orifice, 13 is dust concentration sensor, 14 enter mouth for dust laden air, 15 is transparent pipeline, 16 is light source, 17 is hollow out pipeline, 18 go out mouth for dust laden air, 19 is dust discharge line, 20 is filtrator, 21 is micro-suction pump, 22 is lens, 23 is detector, 24 is Bas Discharged pipeline, 25 is darkroom.
Embodiment
Embodiment 1: as Figure 1-5, a kind of outdoor sun power dust concentration measurement mechanism, comprises inlet (dust contained gas) 1, digital display module 2, accumulator 3, dust outlet 4, one-chip computer module 5, facility switching 6, movable rotation-shaft 7, solar panel 8, support 9, A/D change-over circuit 10, air outlet 11, fixed orifice 12, dust concentration sensor 13;
Described dust concentration sensor 13 is placed in device interior left side, inlet (dust contained gas) 1 is connected to dust concentration sensor 13 tops, dust outlet 4 is connected to dust concentration sensor 13 left sides, air outlet 11 is connected to dust concentration sensor 13 belows, A/D change-over circuit 10 is positioned at dust concentration sensor 13 lower rights and is connected with dust concentration sensor 13, one-chip computer module 5 is arranged in the middle of device interior and is connected with left side A/D change-over circuit 10, accumulator 3 be arranged on device interior right side and with solar panel 8, dust concentration sensor 13, one-chip computer module 5 is connected, numeral display module 2 is placed in device external and is connected with one-chip computer module 5, facility switching 6 is placed in below, device external right side and is connected with one-chip computer module 5, solar panel 8 is connected with support 9 by movable rotation-shaft 7, there is fixed orifice 12 at the below of support 9 and the back side,
Described dust concentration sensor 13 inside comprise that dust laden air enters mouth 14, transparent pipeline 15, light source 16, hollow out pipeline 17, dust laden air and goes out mouth 18, dust discharge line 19, filtrator 20, micro-suction pump 21, darkroom 25, and described darkroom 25 comprises lens 22, detector 23, Bas Discharged pipeline 24, wherein dust laden air enters mouth 14 tops and is connected with inlet (dust contained gas) 1, dust laden air enters mouth 14 bottoms and is connected with hollow out pipeline 17 with transparent pipeline 15, transparent pipeline 15 and hollow out pipeline 17 nest together and hollow out pipeline 17 is positioned at inner side, light source 16 is arranged on the right side of transparent pipeline 15, transparent pipeline 15 goes out mouth 18 tops with hollow out pipeline 17 belows and dust laden air and is connected, dust laden air goes out mouth 18 bottoms and is connected with filtrator 20, filtrator 20 left sides are connected with micro-suction pump 21, micro-suction pump 21 is connected with dust discharge line 19 one end again, dust discharge line 19 other ends are connected with dust outlet 4, filtrator 20 belows are connected with darkroom 25, lens 22 are arranged on 25 tops, darkroom and lens 22 and face dust laden air and go out mouth 18, light source 16 is arranged on lens 22 right sides, detector 23 is arranged on lens 22 belows, Bas Discharged pipeline 24 is connected to below, darkroom and is connected with air outlet 11.
Described detector 23 comprises Pin photosensitive tube, operational amplifier A D549, feedback resistance Rf, capacitor C f; Wherein one end of Pin photosensitive tube is extremely connected and ground connection with operational amplifier A D549 "+", and the other end is connected with capacitor C f; Capacitor C f mono-termination Pin photosensitive tube, the other end is connected with the output terminal of operational amplifier A D549; Feedback resistance Rf one end is extremely connected with operational amplifier A D549 "-", and the other end is connected with the line between capacitor C f and the output terminal of operational amplifier A D549; Operational amplifier A D549 meets supply voltage Vs, and output terminal output voltage V 0 is connected with the port 25 of A/D converter ADC0832 in A/D change-over circuit 10.
Described A/D change-over circuit 10 comprises resistance R 1, the A/D converter ADC0832 of 1 kilo-ohm; Wherein the positive pole of dust concentration sensor 13 is connected with power supply, the negative pole of dust concentration sensor 13 is connected with resistance R 1, the other end ground connection of resistance R 1, the port 25 of A/D converter ADC0832 is connected with the line of resistance R 1 with dust concentration sensor 13, port 27 ground connection of A/D converter ADC0832, the port 29 of A/D converter ADC0832 is connected with the P1.2 of one-chip computer module 5, one-chip computer module 5
/ VP end is connected with power supply.
Described digital display module 2 comprises 8D latch 74LS373, digital indicator ARK SR 410561K, resistance R 6, R7, R8, R9, R10, R11, R12, the R13 of 10 kilo-ohms, resistance R 2, R3, R4, the R5 of 1 kilo-ohm, NPN type triode T1, T2, T3, T4; Wherein P0.0 ~ P0.7 pin of one-chip computer module 5 and 1D ~ 8D port of 8D latch 74LS373 are connected; Resistance R 6, R7, R8, R9, R10, R11, R12, R13 mono-end are connected on power supply, and the other end is connected on respectively on the line between P0.0 ~ P0.7 and 1D ~ 8D; 8D latch 74LS373's
end ground connection, G termination power, 1Q ~ 8Q is connected with a, b, c, d, e, f, g, the dp end of digital indicator ARK SR 410561K respectively; SEG1 ~ SEG4 of digital indicator ARK SR 410561K is connected with the emitter of NPN type triode T1, T2, T3, T4 respectively, the base stage of NPN type triode T1, T2, T3, T4 is connected on the P2.0 ~ P2.3 of one-chip computer module 5 after being connected with resistance R 2, R3, R4, R5 respectively, the collector of NPN type triode T1, T2, T3, T4 connects power supply.
Described one-chip computer module 5 is AT89C51.
By reference to the accompanying drawings the specific embodiment of the present invention is explained in detail above, but the present invention is not limited to above-mentioned embodiment, in the ken possessing those of ordinary skill in the art, can also under the prerequisite that does not depart from aim of the present invention, make various variations.
Claims (5)
1. an outdoor sun power dust concentration measurement mechanism, is characterized in that: comprise inlet (dust contained gas) (1), digital display module (2), accumulator (3), dust outlet (4), one-chip computer module (5), facility switching (6), movable rotation-shaft (7), solar panel (8), support (9), A/D change-over circuit (10), air outlet (11), fixed orifice (12), dust concentration sensor (13);
Described dust concentration sensor (13) is placed in device interior left side, inlet (dust contained gas) (1) is connected to dust concentration sensor (13) top, dust outlet (4) is connected to dust concentration sensor (13) left side, air outlet (11) is connected to dust concentration sensor (13) below, A/D change-over circuit (10) is positioned at dust concentration sensor (13) lower right and is connected with dust concentration sensor (13), one-chip computer module (5) is arranged in the middle of device interior and is connected with left side A/D change-over circuit (10), accumulator (3) be arranged on device interior right side and with solar panel (8), dust concentration sensor (13), one-chip computer module (5) is connected, numeral display module (2) is placed in device external and is connected with one-chip computer module (5), facility switching (6) is placed in below, device external right side and is connected with one-chip computer module (5), solar panel (8) is connected with support (9) by movable rotation-shaft (7), there is fixed orifice (12) at the below of support (9) and the back side,
Described dust concentration sensor (13) inside comprises that dust laden air enters mouth (14), transparent pipeline (15), light source (16), hollow out pipeline (17), dust laden air and goes out mouth (18), dust discharge line (19), filtrator (20), micro-suction pump (21), darkroom (25), and described darkroom (25) comprise lens (22), detector (23), Bas Discharged pipeline (24), wherein dust laden air enters mouth (14) top and is connected with inlet (dust contained gas) (1), dust laden air enters mouth (14) bottom and is connected with hollow out pipeline (17) with transparent pipeline (15), transparent pipeline (15) and hollow out pipeline (17) nest together and hollow out pipeline (17) is positioned at inner side, light source (16) is arranged on the right side of transparent pipeline (15), transparent pipeline (15) goes out mouth (18) top with hollow out pipeline (17) below with dust laden air and is connected, dust laden air goes out mouth (18) bottom and is connected with filtrator (20), filtrator (20) left side is connected with micro-suction pump (21), micro-suction pump (21) is connected with dust discharge line (19) one end again, dust discharge line (19) other end is connected with dust outlet (4), filtrator (20) below is connected with darkroom (25), lens (22) are arranged on darkroom (25) top and lens (22) and face dust laden air and go out mouth (18), light source (16) is arranged on lens (22) right side, detector (23) is arranged on lens (22) below, Bas Discharged pipeline (24) is connected to below, darkroom and is connected with air outlet (11).
2. outdoor sun power dust concentration measurement mechanism according to claim 1, is characterized in that: described detector (23) comprises Pin photosensitive tube, operational amplifier A D549, feedback resistance Rf, capacitor C f; Wherein one end of Pin photosensitive tube is extremely connected and ground connection with operational amplifier A D549 "+", and the other end is connected with capacitor C f; Capacitor C f mono-termination Pin photosensitive tube, the other end is connected with the output terminal of operational amplifier A D549; Feedback resistance Rf one end is extremely connected with operational amplifier A D549 "-", and the other end is connected with the line between capacitor C f and the output terminal of operational amplifier A D549; Operational amplifier A D549 meets supply voltage Vs, and output terminal output voltage V 0 is connected with the port 25 of A/D converter ADC0832 in A/D change-over circuit (10).
3. outdoor sun power dust concentration measurement mechanism according to claim 1, is characterized in that: described A/D change-over circuit (10) comprises resistance R 1, the A/D converter ADC0832 of 1 kilo-ohm; Wherein the positive pole of dust concentration sensor (13) is connected with power supply, the negative pole of dust concentration sensor (13) is connected with resistance R 1, the other end ground connection of resistance R 1, the port 25 of A/D converter ADC0832 is connected with the line of resistance R 1 with dust concentration sensor (13), port 27 ground connection of A/D converter ADC0832, the port 29 of A/D converter ADC0832 is connected with the P1.2 of one-chip computer module (5), one-chip computer module (5)
/ VP end is connected with power supply.
4. outdoor sun power dust concentration measurement mechanism according to claim 1, it is characterized in that: described digital display module (2) comprises 8D latch 74LS373, digital indicator ARK SR 410561K, resistance R 6, R7, R8, R9, R10, R11, R12, the R13 of 10 kilo-ohms, resistance R 2, R3, R4, the R5 of 1 kilo-ohm, NPN type triode T1, T2, T3, T4; Wherein P0.0 ~ P0.7 pin of one-chip computer module (5) and 1D ~ 8D port of 8D latch 74LS373 are connected; Resistance R 6, R7, R8, R9, R10, R11, R12, R13 mono-end are connected on power supply, and the other end is connected on respectively on the line between P0.0 ~ P0.7 and 1D ~ 8D; 8D latch 74LS373's
end ground connection, G termination power, 1Q ~ 8Q is connected with a, b, c, d, e, f, g, the dp end of digital indicator ARK SR 410561K respectively; SEG1 ~ SEG4 of digital indicator ARK SR 410561K is connected with the emitter of NPN type triode T1, T2, T3, T4 respectively, the base stage of NPN type triode T1, T2, T3, T4 is connected on the P2.0 ~ P2.3 of one-chip computer module (5) after being connected with resistance R 2, R3, R4, R5 respectively, the collector of NPN type triode T1, T2, T3, T4 connects power supply.
5. according to the outdoor sun power dust concentration measurement mechanism described in any one in claim 1 to 4, it is characterized in that: described one-chip computer module (5) is AT89C51.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410385487.XA CN104132875A (en) | 2014-08-07 | 2014-08-07 | Outdoor solar dust concentration measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410385487.XA CN104132875A (en) | 2014-08-07 | 2014-08-07 | Outdoor solar dust concentration measuring device |
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| CN104132875A true CN104132875A (en) | 2014-11-05 |
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| CN201410385487.XA Pending CN104132875A (en) | 2014-08-07 | 2014-08-07 | Outdoor solar dust concentration measuring device |
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Application publication date: 20141105 |