CN205538672U - Particulate matter volume concentration detection device in air based on laser light scattering principle - Google Patents
Particulate matter volume concentration detection device in air based on laser light scattering principle Download PDFInfo
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- CN205538672U CN205538672U CN201620360352.2U CN201620360352U CN205538672U CN 205538672 U CN205538672 U CN 205538672U CN 201620360352 U CN201620360352 U CN 201620360352U CN 205538672 U CN205538672 U CN 205538672U
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Abstract
The utility model provides a particulate matter volume concentration detection device in air based on laser light scattering principle, belongs to air concentration by mass and detects technical field, the utility model discloses a there is the problem that the precision is poor, the sensor uniformity is poor, hardware circuit moire is serious, electromagnetic protection is not enough that detects in it to solve current laser dust detection instrument. The utility model discloses the air current chamber is cavity in " U " type, and one end is the air intake, and the other end is the air outlet, and air intake and air outlet lie in the same side of shell, and the setting of granule striking wall is at air current chamber air inlet end, and the fan setting is equipped with laser generator at the air outlet in air current chamber between air intake and the air outlet, and silicon photocell installs on the shell upper cover medial surface, and dust collecting tank sets up in the shell bottom, set up an opening on the air current chamber, the opening is just to the laser generator signalling port, and the board is penetrated in another proper fifty percent discount of opening, and refraction board fixed mounting is between shell and air current chamber. The utility model is used for measure air particulate matter concentration.
Description
Technical field
This utility model relates to a kind of particulate matter quality concentration detection apparatus, belongs to air quality Concentration Detection field.
Background technology
Particulate matter duration in atmosphere is the longest, creates a great impression health and atmospheric visibility.A particulate matter part in air is from the directly discharge of polluter, such as chimney and vehicle, another part is then the fine particle thing interacted to form by surrounding air sulphur oxide, nitrogen oxides, VOC and other compound, they chemically and physically form according to place, weather, season in 1 year is different and changes the biggest.Pellet usually from non-black top, cement road surface on exercise motor vehicles, broken processing procedure and the dust kicked up by wind of milling of material.
The method for monitoring and analyzing of particulate matter is mass method, and domestic the most frequently used detecting instrument is laser dust monitor.But the laser particle thing sensor accuracy of detection that existing laser dust monitor uses is poor, and sensor consistency is poor, hardware circuit ripple serious interference, electromagnetic protection is not enough, and counting algorithm precision is low, and production technology can not meet coherence request.
Utility model content
This utility model purpose is to there is the problem that accuracy of detection is poor, sensor consistency is poor, hardware circuit moire disturbance is serious, electromagnetic protection is not enough to solve existing laser dust detecting instrument, it is provided that a kind of particulate in air mass concentration based on laser light scattering principle detection device.
A kind of particulate in air mass concentration based on laser light scattering principle of this utility model detection device, a kind of particulate in air mass concentration based on laser light scattering principle detects device, and it includes shell, air flow chamber, particles hit wall and dust collecting groove,
Air flow chamber is " U " type cavity, one end of " U " type cavity is air inlet, the other end is air outlet, the air inlet of air flow chamber and air outlet are positioned on the same side of shell, particles hit wall is arranged on the air intake of air flow chamber, and be arranged in the cavity of air flow chamber, fan is arranged on the air outlet of air flow chamber, and fan is arranged on the inside of shell, it is provided with laser generator between air flow chamber air inlet and air outlet, on the medial surface of the upper cover that silicon cell is arranged on shell, and silicon cell is able to detect that the scattering light in 90 ° of directions that laser generator launches, dust collecting groove is arranged on the bottom of shell；One opening is set in air flow chamber, opening just signal emission port to laser generator, another proper birefringence plate of opening, and deflecting plate is 45° angle with opening, deflecting plate is fixedly mounted between shell and air flow chamber；
nullThe laser that laser generator is launched is radiated on particulate matter and scatters，Silicon cell detects the optical signal that particulate matter scatters，And convert optical signals to signal of telecommunication transmission to charge amplifier，The signal of telecommunication amplified is exported to peaker by charge amplifier，The signal of telecommunication after conversion is exported to first-order active filter by peaker，The signal of telecommunication after reactive-load compensation is exported to microprocessor by first-order active filter，The rotating speed of fan is exported to microprocessor by signal acquisition circuit，The rotation speed of the fan control signal outfan of microprocessor is connected to fan，The laser control signal outfan of microprocessor connects the laser control signal input of laser generator，Microprocessor obtains the height of pulse and the pulse number in the unit interval according to the signal of telecommunication received，Pulse height represents the size of particulate matter，Pulse number in unit interval represents the quantity of unit interval endoparticle thing，It is particulate matter mass concentration.
Advantage of the present utility model: a kind of based on laser light scattering principle the particulate in air mass concentration detection device that the utility model proposes, by the improvement of hardware circuit, significantly improve accuracy and the concordance of sensor, measuring suspended particulate substance based on 90 ° of laser light scattering principles, laser particle sensor is all through factory calibration.Structure design packet clashes into wall and dust collecting groove containing bulky grain, sensor so can be made from dust, dust and other bulky grain pollutant effects, thus improve ruggedness.The convenient application of the design of homonymy outlet and inlet is installed, and can provide stable air-flow.This utility model is obtained in that in unit volume 0.3～2.5 micron aerosol particulate matter mass concentrations in air, and exports with digital interface form.This utility model can also embed the various instrument and meter relevant to suspended particulate matter concentration in air or improvement of environment equipment, provides concentration data promptly and accurately for it.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of particulate in air mass concentration based on laser light scattering principle described in the utility model detection device；
Fig. 2 is the electrical schematic diagram of a kind of particulate in air mass concentration based on laser light scattering principle described in the utility model detection device.
Detailed description of the invention
Detailed description of the invention one: present embodiment is described below in conjunction with Fig. 1 and Fig. 2, a kind of particulate in air mass concentration based on laser light scattering principle described in present embodiment detects device, and it includes shell 1, air flow chamber 2, particles hit wall 3 and dust collecting groove 4,
Air flow chamber 2 is " U " type cavity, one end of " U " type cavity is air inlet, the other end is air outlet, the air inlet of air flow chamber 2 and air outlet are positioned on the same side of shell 1, particles hit wall 3 is arranged on the air intake of air flow chamber 2, and be arranged in the cavity of air flow chamber 2, fan 7 is arranged on the air outlet of air flow chamber 2, and fan 7 is arranged on the inside of shell 1, laser generator 5 it is provided with between air flow chamber 2 air inlet and air outlet, on the medial surface of the upper cover that silicon cell 6 is arranged on shell 1, and silicon cell 6 is able to detect that the scattering light in 90 ° of directions that laser generator 5 launches, dust collecting groove 4 is arranged on the bottom of shell 1；One opening is set in air flow chamber 2, opening just signal emission port to laser generator 5, another proper birefringence plate 1-1 of opening, and deflecting plate 1-1 is 45° angle with opening, deflecting plate 1-1 is fixedly mounted between shell 1 and air flow chamber 2；
nullThe laser that laser generator 5 is launched is radiated on particulate matter and scatters，Silicon cell 6 detects the optical signal that particulate matter scatters，And convert optical signals to signal of telecommunication transmission to charge amplifier 8，The signal of telecommunication amplified is exported to peaker 9 by charge amplifier 8，The signal of telecommunication after conversion is exported to first-order active filter 10 by peaker 9，The signal of telecommunication after reactive-load compensation is exported to microprocessor 11 by first-order active filter 10，The rotating speed of fan 7 is exported to microprocessor 11 by signal acquisition circuit 12，The rotation speed of the fan control signal outfan of microprocessor 11 is connected to fan，The laser control signal outfan of microprocessor 11 connects the laser control signal input of laser generator 5，Microprocessor 11 obtains the height of pulse and the pulse number in the unit interval according to the signal of telecommunication received，Pulse height represents the size of particulate matter，Pulse number in unit interval represents the quantity of unit interval endoparticle thing，It is particulate matter mass concentration.
Detailed description of the invention two: embodiment one is described further by present embodiment, microprocessor 11 uses single-chip microcomputer.
In the present invention, fan 7 can provide stable air-flow, light scattering phenomenon can be produced when the particle of particulate matter is by laser when, the silicon cell 6 being arranged on 90 ° of directions in structure can detect the light of scattering, the signal of telecommunication is converted optical signals into by photodiode, microprocessor 11 is entered through charge amplifier 8, pass through Digital Signal Processing, obtain pulse height and the pulse number of unit interval of the signal of telecommunication, umber of pulse represents population, pulse height represents particle size, last and reference instrument (TSI8530) carries out factory calibration in airtight space.
Claims (2)
1. particulate in air mass concentration based on a laser light scattering principle detection device, it includes shell (1), air flow chamber (2), particles hit wall (3) and dust collecting groove (4)；
Air flow chamber (2) is " U " type cavity, one end of " U " type cavity is air inlet, the other end is air outlet, the air inlet of air flow chamber (2) and air outlet are positioned on the same side of shell (1), particles hit wall (3) is arranged on the air intake of air flow chamber (2), and be arranged in the cavity of air flow chamber (2), fan (7) is arranged on the air outlet of air flow chamber (2), and fan (7) is arranged on the inside of shell (1), air flow chamber (2) is provided with laser generator (5) between air inlet and air outlet, on the medial surface of the upper cover that silicon cell (6) is arranged on shell (1), and silicon cell (6) is able to detect that the scattering light in 90 ° of directions that laser generator (5) launches, dust collecting groove (4) is arranged on the bottom of shell (1)；Air flow chamber arranges an opening on (2), opening just signal emission port to laser generator (5), another proper birefringence plate (1-1) of opening, and deflecting plate (1-1) is 45° angle with opening, deflecting plate (1-1) is fixedly mounted between shell (1) and air flow chamber (2)；
nullThe laser that laser generator (5) is launched is radiated on particulate matter and scatters，Silicon cell (6) detects the optical signal that particulate matter scatters，And convert optical signals to the signal of telecommunication and send to charge amplifier (8)，The signal of telecommunication amplified is exported to peaker (9) by charge amplifier (8)，Peaker (9) is by the signal of telecommunication output after conversion to first-order active filter (10)，The signal of telecommunication after reactive-load compensation is exported to microprocessor (11) by first-order active filter (10)，The rotating speed of fan (7) is by signal acquisition circuit (12) output to microprocessor (11)，The rotation speed of the fan control signal outfan of microprocessor (11) is connected to fan，The laser control signal outfan of microprocessor (11) connects the laser control signal input of laser generator (5)，Microprocessor (11) obtains the height of pulse and the pulse number in the unit interval according to the signal of telecommunication received，Pulse height represents the size of particulate matter，Pulse number in unit interval represents the quantity of unit interval endoparticle thing，It is particulate matter mass concentration.
A kind of particulate in air mass concentration based on laser light scattering principle the most according to claim 1 detection device, it is characterised in that microprocessor (11) uses single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620360352.2U CN205538672U (en) | 2016-04-26 | 2016-04-26 | Particulate matter volume concentration detection device in air based on laser light scattering principle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620360352.2U CN205538672U (en) | 2016-04-26 | 2016-04-26 | Particulate matter volume concentration detection device in air based on laser light scattering principle |
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| CN201620360352.2U Expired - Fee Related CN205538672U (en) | 2016-04-26 | 2016-04-26 | Particulate matter volume concentration detection device in air based on laser light scattering principle |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680171A (en) * | 2017-03-07 | 2017-05-17 | 济南诺方电子技术有限公司 | Rainproof cover of dust sensor |
| CN106769744A (en) * | 2017-03-07 | 2017-05-31 | 济南诺方电子技术有限公司 | A kind of vehicle-mounted laser dust sensor |
| CN107036946A (en) * | 2017-04-28 | 2017-08-11 | 江苏大学 | Solid particulate matter concentration detection apparatus under a kind of high humidity environment |
| CN107121364A (en) * | 2017-06-20 | 2017-09-01 | 兰州大学 | The multifunction measuring set that a kind of particle system influences on laser signal |
| CN108088775A (en) * | 2017-12-07 | 2018-05-29 | 广东力源科技股份有限公司 | A kind of detection method of air-borne dust granular size and concentration |
| CN108613907A (en) * | 2018-07-04 | 2018-10-02 | 汉王科技股份有限公司 | Particulate matter detection means |
| CN108827917A (en) * | 2017-04-24 | 2018-11-16 | Itm半导体有限公司 | Optics dust inductor |
| CN109520899A (en) * | 2018-11-27 | 2019-03-26 | 四川长虹电器股份有限公司 | A kind of air particle concentration detection method and device |
| CN109724905A (en) * | 2017-10-30 | 2019-05-07 | 常州海马科技有限公司 | Particle concentration detection device, method and air processor |
| PL425210A1 (en) * | 2018-04-12 | 2019-10-21 | Główny Instytut Górnictwa | Laser optical dust meter |
| PL425211A1 (en) * | 2018-04-12 | 2019-10-21 | Główny Instytut Górnictwa | Optical dust meter casing |
| CN110418955A (en) * | 2017-01-03 | 2019-11-05 | 霍尼韦尔国际公司 | Ascending air is utilized in fan-free dust sensor |
| CN110927031A (en) * | 2018-09-20 | 2020-03-27 | 现代自动车株式会社 | Particulate matter sensing sensor assembly |
| CN112326518A (en) * | 2020-09-19 | 2021-02-05 | 宁波爱立德汽车部件有限公司 | PM2.5 sensor device |
| CN112912696A (en) * | 2018-10-03 | 2021-06-04 | 法雷奥热系统公司 | Electronic assembly for a motor vehicle |
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- 2016-04-26 CN CN201620360352.2U patent/CN205538672U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110418955A (en) * | 2017-01-03 | 2019-11-05 | 霍尼韦尔国际公司 | Ascending air is utilized in fan-free dust sensor |
| CN106769744A (en) * | 2017-03-07 | 2017-05-31 | 济南诺方电子技术有限公司 | A kind of vehicle-mounted laser dust sensor |
| CN106680171A (en) * | 2017-03-07 | 2017-05-17 | 济南诺方电子技术有限公司 | Rainproof cover of dust sensor |
| CN108827917A (en) * | 2017-04-24 | 2018-11-16 | Itm半导体有限公司 | Optics dust inductor |
| CN107036946A (en) * | 2017-04-28 | 2017-08-11 | 江苏大学 | Solid particulate matter concentration detection apparatus under a kind of high humidity environment |
| CN107121364A (en) * | 2017-06-20 | 2017-09-01 | 兰州大学 | The multifunction measuring set that a kind of particle system influences on laser signal |
| CN109724905A (en) * | 2017-10-30 | 2019-05-07 | 常州海马科技有限公司 | Particle concentration detection device, method and air processor |
| CN109724905B (en) * | 2017-10-30 | 2024-02-20 | 常州海马科技有限公司 | Particulate matter concentration detection equipment, particulate matter concentration detection method and air treatment device |
| CN108088775A (en) * | 2017-12-07 | 2018-05-29 | 广东力源科技股份有限公司 | A kind of detection method of air-borne dust granular size and concentration |
| PL425210A1 (en) * | 2018-04-12 | 2019-10-21 | Główny Instytut Górnictwa | Laser optical dust meter |
| PL425211A1 (en) * | 2018-04-12 | 2019-10-21 | Główny Instytut Górnictwa | Optical dust meter casing |
| CN108613907A (en) * | 2018-07-04 | 2018-10-02 | 汉王科技股份有限公司 | Particulate matter detection means |
| CN110927031A (en) * | 2018-09-20 | 2020-03-27 | 现代自动车株式会社 | Particulate matter sensing sensor assembly |
| CN112912696A (en) * | 2018-10-03 | 2021-06-04 | 法雷奥热系统公司 | Electronic assembly for a motor vehicle |
| CN109520899A (en) * | 2018-11-27 | 2019-03-26 | 四川长虹电器股份有限公司 | A kind of air particle concentration detection method and device |
| CN112326518A (en) * | 2020-09-19 | 2021-02-05 | 宁波爱立德汽车部件有限公司 | PM2.5 sensor device |
| CN112326518B (en) * | 2020-09-19 | 2022-11-25 | 宁波爱立德汽车部件有限公司 | PM2.5 sensor device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20170426 |
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| CF01 | Termination of patent right due to non-payment of annual fee |