CN202793978U - Novel intelligent sensor for measuring dust concentration through laser back-scattering method - Google Patents
Novel intelligent sensor for measuring dust concentration through laser back-scattering method Download PDFInfo
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- CN202793978U CN202793978U CN 201220375450 CN201220375450U CN202793978U CN 202793978 U CN202793978 U CN 202793978U CN 201220375450 CN201220375450 CN 201220375450 CN 201220375450 U CN201220375450 U CN 201220375450U CN 202793978 U CN202793978 U CN 202793978U
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- laser
- microprocessor
- light
- dust concentration
- novel intelligent
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Abstract
The utility model discloses a novel intelligent sensor for measuring dust concentration through a laser back-scattering method. The novel intelligent sensor works as follows: a laser serving as a light source outputs constant light intensity through a microprocessor, the light is emitted into a detected smoke channel area based on a certain inclination angle theta; the light scattered by the smoke is collected into a receiver by a focusing lens and then is converted into an electric signal; an optical filter is added and is used for effectively preventing the interference of other parasitic lights; and the electrical signal is amplified and filtered by the microprocessor and then is converted into the dust concentration. By adopting the novel intelligent sensor, the stability and precision are greatly improved, and the maintaining cost is reduced; and the novel intelligent sensor has the advantages of being simple and reliable in structural design of light paths, and convenient to arrange and maintain.
Description
Technical field
The utility model relates to a kind of sensor, relates in particular to behind a kind of new pattern laser scattering method and measures the dust concentration intelligence sensor.
Background technology
Laser dust concentration intelligence sensor merges the intelligence sensor of current comparatively advanced person's ray machine electricity one, be take the present age up-to-date optical technology as leading, have in conjunction with mechanical automation and integrated microprocessor Collection processed and the intelligence sensor of message exchange ability.Adopt the laser backscatter method, by dust light scattering intensity is quick and precisely effectively reflected the dust concentration size.
Laser dust concentration intelligence sensor is mainly used in towards the detection to the middle dust concentration that discharges pollutants in power plant, steel mill, cement mill, the petrochemical plant flue; Atmospheric dust concentration detects in the environment such as flour mill, textile mills; Inflammable and explosive dust detects under the ore deposit.
The sensor that at present both at home and abroad adopts optical method to measure dust concentration mainly contains two kinds of optical transmission method and scattering methods, optical transmission method has certain limitation when at first to be that installation requirement is higher be installed on the industrial chimney, and transmitting terminal and receiving end perforate must be enough coaxial, otherwise the light intensity that receiving end receives can be affected, secondly the external interference such as chimney vibrations have a strong impact on measuring accuracy is to be only suitable for detecting with the dust atmosphere of high concentration, does not reach accuracy requirement during low concentration and can not satisfy the existing situation development and substituted by cooling method gradually.Tradition scattering method sensor of dust concentration volume is larger, and light path design is complicated, and the complicated cost compare of production run is high, and is maintainable poor; Because the sensor of dust concentration working environment is complicated, traditional sensors is difficult to effectively overcome the pollution problem of operation field eyeglass.
The utility model content
The utility model purpose is exactly in order to remedy the defective of prior art, a kind of new pattern laser is provided after scattering method measure the dust concentration intelligence sensor.
The utility model is achieved through the following technical solutions:
Scattering method is measured the dust concentration intelligence sensor behind a kind of new pattern laser, include microprocessor, the one end opening other end becomes stair-stepping shell and flange, described flange links to each other with an end of described shell aperture and flange extend in the flue, have the gas access on one sidewall of described shell, outer upper at the stepped end of described shell is fixed with semiconductor laser device driving circuit plate and the laser instrument that is connected, described microprocessor is fixed on the described semiconductor laser device driving circuit plate, microprocessor is regulated described laser instrument Emission Lasers, the place has a window at shell secondary ladder, the rear of window is provided with level crossing one, described laser instrument passes through this window and passes level crossing one with certain angular emission laser and injects in the flue, dust in the flue returns laser light scattering to enclosure, on the light path of scattered light the place ahead, be provided with successively level crossing two, condenser lens and optical receiver, scattered light is focused and is received by optical receiver after passing condenser lens, optical receiver is converted to the light signal that receives behind the electric signal and electric signal transmission is advanced in the described microprocessor, signal is amplified microprocessor and filtering is processed, by the voltage signal that obtains, the voltage signal that prestores and the proportionate relationship of dust concentration calculate the concentration of dust.
Between described optical receiver and condenser lens, be provided with optical filter, can effectively prevent other light disturbances.
The angle of described laser instrument Emission Lasers is regulated the semiconductor laser device driving circuit plate according to field working conditions and is come the adjusting angle size.
Principle of work of the present utility model is: sent laser and injected in the flue along certain angle θ by laser instrument, entered by the back scattered light signal of dust granules in flue, the θ angle can be regulated semiconductor laser device driving circuit plate drive plate according to field working conditions and be adapted to various complex working conditions.Gas access on one side of shell is in order to prevent that dust granules from polluting optical mirror slip, and from then on the gas access passes into pressurized air, can form the pollution that clean gas barrier film stops dust before described two level crossings.
The utility model adopts the 650nm laser instrument the permanent light intensity of light source to be exported by the microprocessor particular algorithm as light source, in order to prevent light disturbance and with optical signal modulation, through optical focus and parallel after change into directional light and improved energy, light is injected tested flue district with certain tiltangleθ, focus on receiver through the back scattered light of flue dust through focusing lens and convert electric signal to and add again an optical filter and can effectively prevent other light disturbances, convert dust concentration to after by microprocessor the signal amplification filtering being processed again.
The utility model has the advantages that: the clean pressurized air of the utility model utilization purges at the light path front end sensor optical path and forms one section reliable and stable gas column to light path part and dust and pollute source of the gas and realize that effectively isolation prevents that light path from polluting, stability and the precision of sensor have greatly been improved, reduced maintenance cost, it is little to have volume, the light channel structure simplicity of design is reliable, makes things convenient for the advantages such as installation and maintenance.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is system construction drawing of the present utility model.
Embodiment
As shown in Figure 1, scattering method is measured the dust concentration intelligence sensor behind a kind of new pattern laser, include microprocessor 11, the one end opening other end becomes stair-stepping shell 12 and flange 9, described flange 9 links to each other with an end of described shell 12 openings and flange 9 extend in the flue 10, have gas access 7 on one sidewall of described shell 12, outer upper at described shell 12 stepped ends is fixed with semiconductor laser device driving circuit plate 2 and the laser instrument 3 that is connected, described microprocessor 11 is fixed on the described semiconductor laser device driving circuit plate 2, microprocessor 11 is regulated described laser instrument 3 Emission Lasers, 12 secondary ladder places have a window at shell, be provided with level crossing 1 at the rear of window, described laser instrument 3 passes through this window and passes level crossing 1 with certain angular emission laser and injects in the flue 10, dust in the flue 10 goes back to laser light scattering to shell 12 inside, on the light path of scattered light the place ahead, be provided with successively level crossing 25, condenser lens 4 and optical receiver 1, scattered light is focused and is received by optical receiver 1 after passing condenser lens 4, optical receiver 1 is converted to the light signal that receives behind the electric signal and electric signal transmission is advanced in the described microprocessor 11, signal is amplified microprocessor 11 and filtering is processed, by the voltage signal that obtains, the voltage signal that prestores and the proportionate relationship of dust concentration calculate the concentration of dust.
Between described optical receiver 1 and condenser lens 4, be provided with optical filter 8, can effectively prevent other light disturbances.
The angle of described laser instrument 3 Emission Lasers is regulated semiconductor laser device driving circuit plate 2 according to field working conditions and is come the adjusting angle size.
Claims (3)
1. scattering method is measured the dust concentration intelligence sensor behind the new pattern laser, it is characterized in that: include microprocessor, the one end opening other end becomes stair-stepping shell and flange, described flange links to each other with an end of described shell aperture and flange extend in the flue, have the gas access on one sidewall of described shell, outer upper at the stepped end of described shell is fixed with semiconductor laser device driving circuit plate and the laser instrument that is connected, described microprocessor is fixed on the described semiconductor laser device driving circuit plate, microprocessor is regulated described laser instrument Emission Lasers, the place has a window at shell secondary ladder, the window rear arranges a level crossing one, described laser instrument injects in the flue through this window and after passing level crossing one with certain angular emission laser, dust in the flue returns laser light scattering to enclosure, on the light path of scattered light the place ahead, be provided with successively level crossing two, condenser lens and optical receiver, scattered light is focused and is received by optical receiver after passing condenser lens, optical receiver is converted to the light signal that receives behind the electric signal and electric signal transmission is advanced in the described microprocessor, signal is amplified microprocessor and filtering is processed, by the voltage signal that obtains, the voltage signal that prestores and the proportionate relationship of dust concentration calculate the concentration of dust.
2. scattering method is measured the dust concentration intelligence sensor behind the new pattern laser according to claim 1, it is characterized in that: be provided with optical filter between described optical receiver and condenser lens.
3. scattering method is measured the dust concentration intelligence sensor behind the new pattern laser according to claim 1, it is characterized in that: the angle of described laser instrument Emission Lasers is regulated the semiconductor laser device driving circuit plate according to field working conditions and is come the adjusting angle size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220375450 CN202793978U (en) | 2012-07-31 | 2012-07-31 | Novel intelligent sensor for measuring dust concentration through laser back-scattering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220375450 CN202793978U (en) | 2012-07-31 | 2012-07-31 | Novel intelligent sensor for measuring dust concentration through laser back-scattering method |
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| Publication Number | Publication Date |
|---|---|
| CN202793978U true CN202793978U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220375450 Expired - Lifetime CN202793978U (en) | 2012-07-31 | 2012-07-31 | Novel intelligent sensor for measuring dust concentration through laser back-scattering method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854109A (en) * | 2012-07-31 | 2013-01-02 | 安徽皖仪科技股份有限公司 | Novel intelligent sensor for measuring dust concentration by using laser backscattering method |
| CN104914026A (en) * | 2015-06-12 | 2015-09-16 | 艾欧史密斯(中国)热水器有限公司 | Dust concentration detection method and dust concentration sensor |
| CN106680168A (en) * | 2017-02-20 | 2017-05-17 | 常熟市顺欣仪器仪表有限公司 | Dust concentration measuring device |
-
2012
- 2012-07-31 CN CN 201220375450 patent/CN202793978U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854109A (en) * | 2012-07-31 | 2013-01-02 | 安徽皖仪科技股份有限公司 | Novel intelligent sensor for measuring dust concentration by using laser backscattering method |
| CN104914026A (en) * | 2015-06-12 | 2015-09-16 | 艾欧史密斯(中国)热水器有限公司 | Dust concentration detection method and dust concentration sensor |
| CN104914026B (en) * | 2015-06-12 | 2018-08-07 | 艾欧史密斯(中国)热水器有限公司 | Dust concentration detecting method and sensor of dust concentration |
| CN106680168A (en) * | 2017-02-20 | 2017-05-17 | 常熟市顺欣仪器仪表有限公司 | Dust concentration measuring device |
| CN106680168B (en) * | 2017-02-20 | 2023-10-27 | 常熟市顺欣仪器仪表有限公司 | Dust concentration measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |