CN206300873U - A kind of optics dust concentration detection means - Google Patents
A kind of optics dust concentration detection means Download PDFInfo
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- CN206300873U CN206300873U CN201621247492.5U CN201621247492U CN206300873U CN 206300873 U CN206300873 U CN 206300873U CN 201621247492 U CN201621247492 U CN 201621247492U CN 206300873 U CN206300873 U CN 206300873U
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- light
- darkroom
- dust concentration
- detection means
- optical core
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Abstract
A kind of optics dust concentration detection means, including housing, master control borad, optical core and measurement cavity, the lower end of the measurement cavity are provided with extinction room, and the upper and lower end face in extinction room is gone up to head piece, lower to head piece respectively；The extinction room also includes launching light darkroom, reflected light darkroom and base plate, and transmitting light entrance is additionally provided with the inside of the launching light darkroom, and reflection light entrance is provided with the inside of the reflected light darkroom；Open environment monitoring based on measurement cavity, can be with the accurate dust concentration data of Real-time Collection, simultaneously, the black light that optical core is launched, by the extinction darkroom structure of the utility model innovative design, can effectively absorb and exclude because of the light interference that other reflections or scattering surface are produced, it can be ensured that the scattering light that optical core is received is produced by the dust in environment to be measured, the collection accuracy of optical core is ensure that, the accuracy of the detection data of the present apparatus is greatly improved.
Description
Technical field
The utility model is related to the production technical field of the dust concentration testing equipment based on optical scattering principle, specifically
A kind of optics dust concentration detection means.
Background technology
In the prior art, the measurement at present for dust concentration mainly uses three kinds of methods：(1) using weight calculation method principle
Filter film type dust sampler (2) uses the dust measurement of electrostatic induction principle using the dust measurement (3) of optical scattering principle
Instrument.
Weight method principle mainly by air suction type dust sampler, on the dust-filtering in air to filter membrane, Ran Houpei
The weight difference that precision balance weighs cleaning filter membrane and dust-laden filter membrane is closed, the weight difference is the powder in the metered volume air of suction
Dust content, by can be calculated the mass concentration in environment, the method troublesome poeration, it is impossible to continuous on-line monitoring.
Compared to the Filter film type dust testing equipment of weight method, for the dust measurement equipment using optical scattering principle
Speech, is that the principle of light generation scattering effect is measured using powder dust particle.Intensity and the dust concentration of light are scattered into certain
Functional relation, the incident illumination of set light intensity produced scattering light to be received by the receiver, dissipated by measurement after being mapped to dust laden air
The light intensity for penetrating light can extrapolate dust concentration.The shortcomings of weight method principle are the method overcome, on-line measurement is capable of achieving, because
It has the feature such as on-line real-time measuremen, easy to operate, has obtained more being widely applied.
But in the prior art, because measurement light can be influenceed by ambient light and some stray reflecteds, therefore, at present
Shading treatment has been carried out to measurement chamber using the detection means of optical scattering principle, some mazy cavity body structures of use,
The measurement cavity of some use fan suction-types, chamber is measured in a word will can avoid the interference of ambient light and stray reflected, this
Sample necessarily causes measurement chamber to form half isolation with measuring environment, it is necessary to allow tested air to enter measurement chamber then by entrance
Again from outlet outflow measurement chamber.Under the dust contents such as colliery environment higher and hot and humid, measurement chamber is usually at tens days
Even pollute in several days, block, stall and the damage of fan occur if with fan, make the instrument cannot be by envisioning
Principle works.
Simultaneously for the design using open measurement cavity configuration, the realization based on optical scattering principle is continuously online
Monitoring, in the prior art with regard to how to exclude the light interference that itself light-emitting tube of other reflectings surface and scattering surface sends, i.e.,：By sending out
Penetrate the measuring beam that pipe is emitted, due to the light beam that miscellaneous part and reflection, scattering surface are reflected also partly generate it is right
Original dust of receiving terminal scatters the interference of light, currently, how to solve the interference of other light beams such as reflected light, is still optics powder
The emphasis research topic of dust detection device.
Utility model content
A kind of optics dust concentration detection means described in the utility model, using the extinction cell structure of innovation structure, pole
The earth is limited due to the detection interference of the reflected beams caused by the situations such as measurement cavity end face reflection, while based on open
Test chamber space structure, is capable of achieving accurate powder concentration measurement in real time, on the premise of ensureing that detection data meets reality, enters
One step improves the detection accuracy of optics dust investigating.
To realize above-mentioned technical goal, technical solution adopted in the utility model is as follows：
A kind of optics dust concentration detection means, including housing, master control borad, optical core and measurement cavity, its feature exist
In：The optical core is fixedly installed in the housing with the master control borad by fastening bolt, and the measurement cavity passes through
Fastening bolt is fixedly arranged on the housing lower end；
The lower end of the measurement cavity is provided with extinction room, and the upper and lower end face in extinction room is respectively equipped with to head piece, lower right
Head piece；The extinction room also includes launching light darkroom, reflected light darkroom and base plate, reflects light entrance, the launching light darkroom
Inner side be additionally provided with transmitting light entrance, be provided with reflection light entrance on the inside of the reflected light darkroom.
Further, the measurement cavity also includes upper cover plate, connection pillar, wherein upper cover plate middle part is equipped with light
Road opening；Head piece position is correspondingly arranged on light path opening on the upper cover plate and extinction room upper surface.
The upper cover plate for measuring cavity leaves a less light path opening, the laser diode in instrument internal movement
The light for sending is irradiated to the measurement point in the middle of measurement chamber by the opening, and the scattering light of generation enters instrument internal by the opening
Photoelectric receiving tube in movement.Because laser tube and photoelectric receiving tube are in instrument internal movement, have necessarily from measurement chamber
Distance, and measurement chamber upper cover plate opening it is smaller, according to fluid behaviour, dust cannot pollute laser tube and photoelectric receiving tube.
The lower cover in measurement chamber described in the utility model also leaves a light path opening, there is an extinction on the downside of the light path opening
Leave light path opening in room, the extinction room side.The light that laser tube sends enters into extinction by the light path opening of extinction room side
, there are multiple reflections in interior, final luminous energy is consumed in extinction room in extinction chamber interior.
Further, the circuit on the master control borad is included：At mu balanced circuit, photoelectric signal processing circuit, single-chip microcomputer
Reason circuit, signal output drive circuit.
Preferably, the light that the optical core sends is near infrared light；To exclude the interference of the generation of the visible ray in environment.
The inwall in the launching light darkroom and reflected light darkroom is coated with non-reflective blackboard paint.Scribbled in darkroom not anti-
The blackboard paint of light, may further ensure that the light not scattered is absorbed by two darkrooms completely, it is to avoid the scattering produced to dust
The interference of light.
Technical solutions of the utility model, compared to the Advantageous Effects existing for prior art：
Based on measurement cavity open environment monitoring, can with the accurate dust concentration data of Real-time Collection, meanwhile, optics
The black light that movement is launched, by the extinction darkroom structure of the utility model innovative design, can effectively absorb exclusion because
The light interference that other reflections or scattering surface are produced, it can be ensured that the powder that the scattering light that optical core is received is in environment to be measured
Produced by dirt, it is ensured that the collection accuracy of optical core, the accuracy of the detection data of the present apparatus is greatly improved.
Brief description of the drawings
Fig. 1 is a kind of structural representation of optics dust concentration detection means of the utility model；
Fig. 2 is a kind of optical core of optics dust concentration detection means of the utility model and the partial structurtes of measurement cavity
Schematic diagram.
Description of symbols：
1- housings；2- master control borads；3- optical cores；4- measures cavity；40- extinctions room；41- upper cover plates；42- connection branch
Post；411- light paths opening；412- launching lights darkroom；413- reflected lights darkroom；414- is upper to head piece；To head piece under 415-；416-
Transmitting light entrance；417- reflects light entrance.
Specific embodiment
Illustrate content of the present utility model below in conjunction with specific embodiments.
Refer to shown in Fig. 1-2, a kind of optics dust concentration detection means, including housing 1, master control borad 2, optical core 3
And measurement cavity 4, optical core 3 is fixedly installed in the housing 1 with master control borad 2 by fastening bolt, described to measure cavity 4
The lower end of the housing 1 is fixedly arranged on by fastening bolt；
Shown in Fig. 2, the lower end for measuring cavity 4 is provided with extinction room 40, and the upper and lower end face in extinction room is gone up to head piece respectively
414th, it is lower to head piece 415；The extinction room 40 also includes launching light darkroom 412, reflected light darkroom 413 and base plate, the hair
The inner side for penetrating light darkroom 412 is additionally provided with transmitting light entrance 416, and the inner side in the reflected light darkroom 413 is provided with reflection light entrance
417。
As shown in Fig. 2 measurement cavity 4 also includes upper cover plate 41, connection pillar 42, wherein the middle part of the upper cover plate 41 is provided with
Light path opening 411；The position of head piece 414 is correspondingly arranged on the light path opening 411 and the upper surface of extinction room 40.
The upper cover plate 41 for measuring cavity 4 leaves a less light path opening 411, the laser in instrument internal movement
The light that diode sends is irradiated to the measurement point in the middle of measurement chamber by the opening, and the scattering light of generation enters instrument by the opening
Photoelectric receiving tube in device internal machine core.Because laser tube and photoelectric receiving tube are in instrument internal movement, from measurement chamber
There is a certain distance, and measurement chamber upper cover plate opening is smaller, according to fluid behaviour, dust cannot pollute laser tube and photoelectricity connects
Closed tube.The lower cover in measurement chamber described in the utility model also leaves a light path opening, has one on the downside of the light path opening
Leave light path opening in extinction room, the extinction room side.The light that laser tube sends is entered into by the light path opening of extinction room side
In extinction room, there are multiple reflections in extinction chamber interior, final luminous energy is consumed in extinction room.
Circuit on master control borad 2 is included：Mu balanced circuit, photoelectric signal processing circuit, single-chip microcomputer process circuit, signal are defeated
Go out drive circuit.
Preferably, the light that the optical core 3 sends is near infrared light；To exclude the dry of the generation of the visible ray in environment
Disturb.
Optical core 3 and measurement cavity 4 are arranged on housing 1 by fastener, constitute core optical of the present utility model
And machine structural parts.Near infrared light is sent by the laser tube of optical core, is entered through measuring the light path opening of upper cover plate in chamber
Enter to measure the measurement point in the middle of chamber, then by measure cavity extinction room upper surface on extinction room 40 is entered to head piece 414.
Near measurement point, near infrared light is scattered by the powder dust particle in environment, and some scattered light is by measuring the upper cover plate 41 of cavity 4
Into on photoelectric receiving tube, after photoelectric receiving tube completes opto-electronic conversion, by electric signal feeding master control borad treatment.
Extinction room 40 is provided with upper to head piece 414 and lower to head piece 415, and the two passage one side to head piece composition are
Path channels, still further aspect is also the air duct containing dust, it is to avoid dust settling piles up the influence caused to light path.Inhale
Light room 40 is provided with double darkroom structures in launching light darkroom 412 and reflected light darkroom 413, and non-reflective blackboard is scribbled in darkroom
Paint, the light not scattered is absorbed by two darkrooms completely, it is to avoid interference to scattering light.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all at this
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Within the protection domain of patent.
Claims (5)
1. a kind of optics dust concentration detection means, including housing, master control borad, optical core and measurement cavity, it is characterised in that：
The optical core is fixedly installed in the housing with the master control borad by fastening bolt, and the measurement cavity is by fastening
Bolt is fixedly arranged on the housing lower end；
The lower end of the measurement cavity is provided with extinction room, and the upper and lower end face in extinction room is respectively equipped with to head piece, lower convection current
Mouthful；The extinction room also includes launching light darkroom, reflected light darkroom and base plate, and hair is additionally provided with the inside of the launching light darkroom
Light entrance is penetrated, reflection light entrance is provided with the inside of the reflected light darkroom.
2. a kind of optics dust concentration detection means as claimed in claim 1, it is characterised in that：The measurement cavity also includes
Upper cover plate and connection pillar, wherein upper cover plate middle part is provided with light path opening；Light path opening and institute on the upper cover plate
State extinction room upper surface on head piece position is correspondingly arranged.
3. a kind of optics dust concentration detection means as claimed in claim 1, it is characterised in that：Circuit on the master control borad
Include：Mu balanced circuit, photoelectric signal processing circuit, single-chip microcomputer process circuit, signal output drive circuit.
4. a kind of optics dust concentration detection means as claimed in claim 1, it is characterised in that：What the optical core sent
Light is near infrared light.
5. a kind of optics dust concentration detection means as claimed in claim 1, it is characterised in that：The launching light darkroom and anti-
The inwall for penetrating light darkroom is coated with non-reflective blackboard paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621247492.5U CN206300873U (en) | 2016-11-22 | 2016-11-22 | A kind of optics dust concentration detection means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621247492.5U CN206300873U (en) | 2016-11-22 | 2016-11-22 | A kind of optics dust concentration detection means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206300873U true CN206300873U (en) | 2017-07-04 |
Family
ID=59211754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621247492.5U Active CN206300873U (en) | 2016-11-22 | 2016-11-22 | A kind of optics dust concentration detection means |
Country Status (1)
| Country | Link |
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| CN (1) | CN206300873U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879672A (en) * | 2020-08-19 | 2020-11-03 | 中煤科工集团重庆研究院有限公司 | High-precision open type easily-maintained dust concentration detection device and method |
| CN111912755A (en) * | 2020-08-07 | 2020-11-10 | 山东中煤工矿物资集团有限公司 | Mining dust concentration sensor, sensor system and method |
-
2016
- 2016-11-22 CN CN201621247492.5U patent/CN206300873U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111912755A (en) * | 2020-08-07 | 2020-11-10 | 山东中煤工矿物资集团有限公司 | Mining dust concentration sensor, sensor system and method |
| CN111912755B (en) * | 2020-08-07 | 2021-08-10 | 山东中煤工矿物资集团有限公司 | Mining dust concentration sensor, sensor system and method |
| CN111879672A (en) * | 2020-08-19 | 2020-11-03 | 中煤科工集团重庆研究院有限公司 | High-precision open type easily-maintained dust concentration detection device and method |
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