CN206557060U - A kind of powder concentration measurement system - Google Patents
A kind of powder concentration measurement system Download PDFInfo
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- CN206557060U CN206557060U CN201720067264.8U CN201720067264U CN206557060U CN 206557060 U CN206557060 U CN 206557060U CN 201720067264 U CN201720067264 U CN 201720067264U CN 206557060 U CN206557060 U CN 206557060U
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Abstract
The utility model is related to a kind of powder concentration measurement system.The powder concentration measurement system includes laser emission element, Laser Transmission unit, powder concentration measurement unit and detection unit, and wherein laser emission element includes laser and beam splitter；Laser Transmission unit includes directional coupler, optical fiber and collimater；Powder concentration measurement unit includes first refractive plane, the second plane of refraction and fully-reflected plane, and first refractive plane and the second plane of refraction are not parallel；The laser through beam splitter beam splitting launched by laser, transmit to collimater and expand through optical fiber after being coupled respectively by directional coupler input, enter back into powder concentration measurement unit, and respectively through first refractive plane and the refraction of the second plane of refraction, through fully-reflected plane total reflection, reversely backtracking enters detection unit to directional coupler after being coupled by directional coupler output end.Using double light path differential measuring method, the problems such as eliminating sensing system error and mining surface optical device dust fall error.
Description
Technical field
The utility model is related to measurement of concetration field, more particularly to a kind of powder concentration measurement system.
Background technology
The measuring method of dust concentration mainly includes Optical Analysis Method and non-optical analytic approach.Non-optical analytic approach is due to inspection
Measurement equipment response speed is slow, processing is complicated, it is difficult to which dust concentration is monitored in real time.Such as existing chemical equation dust
Concentration sensor is, it is necessary to be acquired processing to air-borne dust, with measurement delay inequality, it is impossible to measured in real time.And electric-type
Apparatus for measuring dust concentration security is poor, when mine dust concentration is too high, and slight electric spark can trigger mine explosion
Risk.
Powder concentration measurement technology based on optical analysis has high, strong, fast response time of selectivity of detectivity etc.
Feature, is adapted to real time monitoring, and cost is relatively low, is the Perfected process of later powder concentration measurement.But it is existing hand-held
Apparatus for measuring dust concentration necessarily requires operating personnel to measure at the scene, and high similar to coal mine dust concentration
In environment, operating personnel must carry out dust prevention in measurement, otherwise can damage respiratory tract, unhealthful.Further, since surveying
Measuring appratus be located at high soot region, for a long time using in rear instrument surface or instrument must dust deposit, measurement accuracy can be influenceed.
Utility model content
In order to solve above-mentioned technical problem present in prior art, the purpose of this utility model is to provide a kind of safety
Property good, precision is high, can realize the long-range powder concentration measurement system measured in real time.
To achieve the above object, the utility model employs following technical scheme：
A kind of powder concentration measurement system, including laser emission element, Laser Transmission unit, powder concentration measurement unit and
Detection unit, wherein：The laser emission element includes laser and beam splitter；The Laser Transmission unit includes directional couple
Device, optical fiber and collimater；It is flat that the powder concentration measurement unit includes first refractive plane, the second plane of refraction and total reflection
Face, wherein the first refractive plane and second plane of refraction are not parallel；The detection unit includes photodetector；By
The laser through the beam splitter beam splitting of the laser transmitting, through institute after being coupled respectively by the directional coupler input
State optical fiber and transmit to the collimater and expand, afterwards into the powder concentration measurement unit, and it is flat respectively through first refractive
Face and the second plane of refraction refraction after, through the fully-reflected plane total reflection and reversely backtracking to the directional coupler,
By entering the photodetector after the output end coupling of the directional coupler.
Further, the beam splitter by the laser be divided into strong identical two-beam and the first measurement light for being parallel to each other and
Second measurement light；The directional coupler includes the first directional coupler and the second directional coupler；The collimater includes the
Collimator and the second collimater；The optical fiber includes the first optical fiber and the second optical fiber；The institute of the powder concentration measurement unit
State and form measured zone between first refractive plane and second plane of refraction；The photodetector is visited including the first photoelectricity
Survey device and the second photodetector；The first measurement light is after the first directional coupler input coupling through described the
One optical fiber is transmitted to the first collimator and expanded, after through the first refractive plane refraction enter the measured zone, then
Through second plane of refraction refraction and the fully-reflected plane total reflection, then back through the first collimator shrink beam after
Transmitted through first optical fiber to first directional coupler, by entering after the output end coupling of first directional coupler
First photodetector；The second measurement light is after the second directional coupler input coupling through described second
Optical fiber is transmitted to second collimater and expanded, after enter the measured zone through the first refractive plane refraction, then pass through
Second plane of refraction refraction and fully-reflected plane total reflection, then back through being passed through after the second collimater shrink beam
Second optical fiber is transmitted to second directional coupler, by entering institute after the output end coupling of second directional coupler
State the second photodetector.
Further, the first refractive plane, the second plane of refraction and fully-reflected plane are by the first prism and second
Prism is provided.
Further, first prism and second prism opposition are placed, wherein：First prism is
Right angle prism, including the first right-angle surface, the second right-angle surface and the refraction inclined-plane for being coated with anti-reflection film；Second prism includes
It is coated with the plane of refraction of anti-reflection film, is coated with the fully reflecting surface and the 3rd inclined-plane of the film that is all-trans；Measure the first Rhizoma Sparganii described in light vertical incidence
First right-angle surface of mirror.
Further, described first refraction inclined-plane and second prism of the light through first prism are measured
The fully reflecting surface of second prism described in vertical directive after plane of refraction refraction, then enter rays along original after being totally reflected through the fully reflecting surface
Line is returned；The plane of refraction refraction on refraction inclined-plane and second prism of the second measurement light through first prism
The fully reflecting surface of second prism described in vertical directive, then along former incident route return after fully reflecting surface total reflection afterwards；Institute
State the first measurement light parallel with the light path of the described second measurement light.
Further, the powder concentration measurement system also includes simple lens reshaper, and the simple lens reshaper is arranged on
Between the collimater and first prism.
Further, the powder concentration measurement unit also includes base, wherein：First right-angle surface of first prism
It is fixedly connected with the second right-angle surface with the base；3rd inclined-plane of second prism is fixedly connected with the base.
Further, the first collimator and second collimater are abreast embedded in the base, and with it is described
First right-angle surface of the first prism is vertical.
Further, the simple lens reshaper includes the first simple lens reshaper and the second simple lens reshaper, wherein：
The first simple lens reshaper correspondence first collimator is embedded in the base；The second simple lens reshaper pair
Second collimater is answered to be embedded in the base.
Further, the laser and the beam splitter are away from the powder concentration measurement unit, the directional couple
Device and the photodetector are away from the powder concentration measurement unit.
A kind of powder concentration measurement system of the present utility model, has the advantages that：
1st, the transmission loss using measurement zone dust in air particle for optical signal is measured, and sensing unit is pure light path
System design, has the advantages that to be perfectly safe；
2nd, measurement process is carried out with the light velocity, in the absence of delay problem, can reach real-time measurement effect；
3rd, the laser of optical fiber output is expanded using optical beam-expanding system, measured zone sectional area can be improved, its
Measurement result reflects the average parameter to dust concentration in larger space；
4th, using double light path differential measuring method, the systematic error and mining surface optical device for eliminating sensor fall
The problems such as dirt error, accomplish that only the dust concentration being tested on path is carried out to monitor the purpose with measurement in real time, improve measurement
Precision；
5th, multiple plane of refraction are combined with fully-reflected plane, measurement light is entered Transmission Fibers by backtracking, it is long away from
From the effect above accomplished using simple optical fiber round-trip transmission, the utilization rate of resource is effectively improved；
6th, the separation of input light and output light is carried out using directional coupler, realizes and simple optical fiber is used on transmission line
The advantage being transmitted；
7th, energy handling averagely is carried out using the output light of simple lens reshaper collimation device so that for dust concentration
Measurement carried out under equally distributed light field, the non-uniform Distribution problem of dust concentration in the range of measurement space can be improved to surveying
Measure the adverse effect of result；
8th, apparatus for measuring dust concentration of the present utility model, it is easy to which grafting makes in Minepit environment existing fiber Transmission system
With, and long-distance transmissions are carried out using existing Transmission system, therefore remote control can be realized.
Brief description of the drawings
, below will be to embodiment for clearer explanation the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it is clear that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of apparatus for measuring dust concentration of the present utility model；
In figure：1- lasers, 2- beam splitters, the directional couplers of 31- first, the directional couplers of 32- second, the light of 41- first
Fibre, the optical fiber of 42- second, 51- first collimators, the collimaters of 52- second, 61- the first simple lens reshapers, the simple lenses of 62- second
Reshaper, the photodetectors of 71- first, the photodetectors of 72- second, the prisms of 8- first, 81- first refractive planes, 9-
Two prisms, the plane of refraction of 91- second, 92- fully-reflected planes, 10- bases.
Embodiment
Below in conjunction with the accompanying drawing in the utility model, the technical scheme in the utility model embodiment is carried out it is clear,
Complete description, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole implementation
Example.Based on the embodiment in the utility model, those skilled in the art is not on the premise of creative work is made
The all other embodiment obtained, belongs to protection domain of the present utility model.
As shown in figure 1, being a kind of powder concentration measurement system of the present utility model, the powder concentration measurement system includes swashing
Optical Transmit Unit, Laser Transmission unit, powder concentration measurement unit and detection unit, wherein：Laser emission element includes laser
Device 1 and beam splitter 2；Laser Transmission unit includes directional coupler, optical fiber and collimater；Powder concentration measurement unit includes first
Plane of refraction 81, the second plane of refraction 91 and fully-reflected plane 92, and 81 and second plane of refraction of first refractive plane 91 is uneven
OK；Detection unit includes photodetector；The laser through beam splitter beam splitting launched by laser, passes through directional coupler respectively
Transmit to collimater and expand through optical fiber after input coupling, afterwards into powder concentration measurement unit, and respectively through the first folding
Penetrate after plane and the refraction of the second plane of refraction, through fully-reflected plane total reflection, reversely backtracking passes through to directional coupler
Enter photodetector after the output end coupling of directional coupler.
Specifically, in some embodiments of the present utility model, as shown in figure 1, that laser is divided into two-beam is strong for beam splitter
The first measurement light and the second measurement light identical and be parallel to each other；It is fixed that directional coupler includes the first directional coupler 31 and second
To coupler 32；Optical fiber includes the first optical fiber 41 and the second optical fiber 42；Collimater includes the collimater of first collimator 51 and second
52；Measured zone is formed between the plane of refraction 91 of first refractive plane 81 and second of powder concentration measurement unit；Photodetection
Device includes the first photodetector 71 and the second photodetector 72；First measurement light passes through the input of the first directional coupler 31
Transmit to first collimator 51 and expand through the first optical fiber 41 after coupling, after be refracted into measurement zone through first refractive plane 81
Domain, then through the second plane of refraction 91 refraction and fully-reflected plane 92 be totally reflected, then back through the shrink beam of first collimator 51 after
Transmitted through the first optical fiber 41 to the first directional coupler 31, by entering the after the coupling of the output end of first directional coupler 31
One photodetector 71；Second measurement light is transmitted to the after the coupling of the input of the second directional coupler 32 through the second optical fiber 42
Two collimaters 52 are expanded, after be refracted into measured zone through first refractive plane 81, then through the refraction of the second plane of refraction 91 and
Fully-reflected plane 92 is totally reflected, then back through after the shrink beam of the second collimater 52 through the second optical fiber 42 transmit to second orientation coupling
Clutch 32, by entering the second photodetector 72 after the output end coupling of second directional coupler 32.
It is directional light to be approximately because of the laser that laser 1 is sent, and laser can be first passed through before the beam splitting of beam splitter 2 is entered
Coupler is focused on, and laser is divided into the identical measurement light of two beams by beam splitter, after being coupled respectively by directional coupler afterwards
Into optical fiber transmission, laser is transmitted separately to collimater and expanded by optical fiber, and the optical signal after decay passes through fully-reflected plane
Backtracking is pressed after reflection, carries out entering optical fiber transmission after shrink beam back through collimater, and the light transmitted through optical fiber is entering
Photodetector is carried out before opto-electronic conversion, can convert the light to directional light by directional coupler.This is due to optical fiber output
There is Self-focusing in light, and the resolution ratio of detector typically will not be very high, is converted into having after directional light by directional coupler
Beneficial to preferably carrying out opto-electronic conversion in photodetector.And first refractive plane and the not parallel design of the second plane of refraction
Measurement light is transmitted optical path length difference in measured zone, realize the acquisition to double light path path difference.
Powder concentration measurement unit of the present utility model using pure light path system design, using dust in air particle for
The transmission loss of optical signal is measured, and has the advantages that to be perfectly safe；Measurement process is carried out with light beam, in the absence of asking for time delay
Topic, can reach the effect measured in real time；Laser is expanded by optical beam-expanding system in collimater, measurement zone can be improved
Domain sectional area, its measurement result reflects the average parameter to dust concentration in larger space；Laser difference after expanding
Transmitted after the refraction of multiple plane of refraction and fully-reflected plane reflection by backtracking into optical fiber, accomplish to use over long distances
The effect of simple optical fiber round-trip transmission, effectively improves the utilization rate of resource；Input can be made using directional coupler coupling simultaneously
Light is separated with output light, is realized and is transmitted on transmission line using simple optical fiber.
Specifically, in some embodiments of the present utility model, as shown in figure 1, the refraction of first refractive plane 81, second is flat
Face 91 and fully-reflected plane 92 are provided by the first prism 8 and the second prism 9.
Specifically, in some embodiments of the present utility model, as shown in figure 1, the first prism 8 and the second prism 9
Opposition is placed, wherein：First prism 8 is right angle prism, including the first right-angle surface, the second right-angle surface and is coated with anti-reflection film
Reflect inclined-plane 81；Plane of refraction 91 that second prism 9 includes being coated with anti-reflection film, the fully reflecting surface 92 and the 3rd for being coated with the film that is all-trans are oblique
Face；Measure the first right-angle surface of light the first prism of vertical incidence.The opposition distributed architecture of first prism and the second prism,
The acquisition to measured zone double light path path difference is realized, to use difference method, sensor surface dust fall is eliminated and asks
The influence that optic path is lost is inscribed, the single-measurement to being tested path dust concentration is realized.Anti-reflection film can ensure laser
All reflected by plane of refraction, the film that is all-trans then ensures laser all by reflective surface, it is to avoid the unrelated damage of light energy
Lose, improve the degree of accuracy of measurement.
Specifically, in some embodiments of the present utility model, as shown in figure 1, the first measurement light is through the first prism
The fully reflecting surface 92 of the vertical prism of directive second after the refraction of plane of refraction 91 of the prism of inclined-plane 81 and second is reflected, then through being somebody's turn to do
Fully reflecting surface 92 is returned after being totally reflected along former incident route；Second refraction inclined-plane 81 and second of the measurement light through the first prism
The fully reflecting surface 92 of the plane of refraction 91 of prism vertical prism of directive second after reflecting, then after the fully reflecting surface 92 total reflection
Returned along former incident route；First measurement light is parallel with the light path of the second measurement light.According to the refraction between prism and air
Rate value determines the angle between the plane of refraction and fully reflecting surface of the second prism, so that it is guaranteed that laser is just vertical after superrefraction
Directive fully reflecting surface, now incidence angle is zero, and laser will be returned by former incident route.Laser is pressed after backtracking, can be by single
Optical fiber realizes the input and output of laser, accomplishes the effect using simple optical fiber round-trip transmission over long distances, effectively improves money
The utilization rate in source.
Specifically, in some embodiments of the present utility model, as shown in figure 1, the powder concentration measurement system also includes
Simple lens reshaper, the simple lens reshaper is arranged between collimater and the first prism.It is aligned using simple lens reshaper
The output light of straight device carries out energy handling averagely, and the measurement for dust concentration can be caused to enter under equally distributed light field
OK, adverse effect of the non-uniform Distribution problem to measurement result of dust concentration in the range of measurement space can be improved.
Specifically, in some embodiments of the present utility model, as shown in figure 1, powder concentration measurement unit also includes bottom
Seat 10, wherein：The first right-angle surface and the second right-angle surface of first prism are fixedly connected with base；The 3rd of second prism
Inclined-plane is fixedly connected with base.Base 10 fixes the first prism 8 and the second prism 9 in the same plane, and ensures the
Angle between the plane of refraction 91 of the refraction prism of inclined-plane 81 and second of one prism is certain, be conducive to the transmission of laser with
And the calculating of follow-up dust concentration.
Specifically, in some embodiments of the present utility model, as shown in figure 1, the collimater of first collimator 51 and second
52 are abreast embedded in base 10, and vertical with the first right-angle surface of the first prism 8.It can be protected in the parallel embedded base of collimater
The light path for demonstrate,proving the two beams measurement light after collimator is expanded is parallel, and the placement for having distance can ensure laser through the first prism
The optical path length for reflecting the two beams measurement light in measured zone after inclined-plane refraction is different, so as to get double light path path difference.
Specifically, in some embodiments of the present utility model, as shown in figure 1, simple lens reshaper includes the first list thoroughly
The simple lens reshaper 62 of mirror reshaper 61 and second, wherein：First simple lens reshaper 61 correspondence first collimator 51 is embedded in
In base 10；Second simple lens reshaper 62 the second collimater 52 of correspondence is embedded in base 10.Simple lens reshaper and collimation
Device is correspondingly embedded in placement, ensure that laser linear transmission between simple lens reshaper and collimater, and make simple lens shaping
The output light of collimater is carried out energy handling averagely by device.
Specifically, in some embodiments of the present utility model, as shown in figure 1, laser and beam splitter are dense away from dust
Measuring unit is spent, directional coupler and photodetector are away from powder concentration measurement unit.So laser is carried out by optical fiber
Long-distance transmissions, can give metrical information Long Distant Transmit at ground handling station, carry out data analysis and process etc., therefore solve
The problem of must measuring at the scene.Grafting it can also be used on the existing fibre-optic transmission system (FOTS) of Minepit environment simultaneously,
And long-distance transmissions are carried out using existing Transmission system, it is achieved in remote detection.
The operation principle of powder concentration measurement system of the present utility model is：The output light of laser 1 passes through coupler coupling
After conjunction, light path is divided into two-way via beam splitter 2 and transmitted, it is believed that the light intensity of this two-way light is equal I.
First measurement light is during measuring environment dust concentration, it is necessary to sequentially pass through the first directional coupler 31, the
One optical fiber 41, first collimator 51, the first simple lens reshaper 61, first refractive plane 81, measured zone, the second plane of refraction
91st, fully-reflected plane 92, the second plane of refraction 91, measured zone, first refractive plane 81, the first simple lens reshaper 61,
Collimator 51, the first optical fiber 41, the first directional coupler 31, the first photodetector 71, the first photodetector 71 are detected
The light intensity arrived is I1。
Second measurement light is during measuring environment dust concentration, it is necessary to sequentially pass through the second directional coupler 32, the
Two optical fiber 42, the second collimater 52, the second simple lens reshaper 62, first refractive plane 81, measured zone, the second plane of refraction
91st, fully-reflected plane 92, the second plane of refraction 91, measured zone, first refractive plane 81, the second simple lens reshaper 62,
Two collimaters 52, the second optical fiber 42, the second directional coupler 32, the second photodetector 72, the second photodetector 72 are detected
The light intensity arrived is I2。
It is assumed that the first measurement light is l in the tested optical path length of measured zone1, the second measurement light is in the tested of measured zone
Optical path length is l2；Total loss that first measurement light passes through all components in addition to the first tested light path is β, first
Transmit light path and under conditions of all component structures and characteristic all same in the second transmission light path, then the second measurement light passes through
Total loss of all components in addition to the second tested light path is also β.If thinking the attenuation of air related to dust concentration
Coefficient is α, and theory is lost according to the light beam of light, should there is formula below：
It can be calculated
As can be seen here, in measuring system, system can be transmitted and damaged for sensor surface dust fall problem in test environment
The influence caused is consumed, is embodied in the influence to β numerical value, and is passed through after double light path difference processing, for attenuation of air
The calculating of factor alpha, is solely dependent upon tested optical path length l1With l2Difference and detection light intensity I1With I2Measured value, with each
The transmission loss β of light path is unrelated.Because certain dust concentration correspond to certain air attenuation coefficient, mark can be passed through in practice
Quasi- test method determines the relation of dust concentration and air attenuation coefficient α, to provide ginseng to the measurement of actual field dust concentration
Examine foundation.
The utility model is further described by specific embodiment above, it should be understood that, have here
The description of body, should not be construed as the restriction to spirit and scope of the present utility model, and one of ordinary skilled in the art is readding
The various modifications made after reader specification to above-described embodiment, belong to the scope that the utility model is protected.
Claims (10)
1. a kind of powder concentration measurement system, it is characterised in that including laser emission element, Laser Transmission unit, dust concentration
Measuring unit and detection unit, wherein：
The laser emission element includes laser and beam splitter；
The Laser Transmission unit includes directional coupler, optical fiber and collimater；
The powder concentration measurement unit includes first refractive plane, the second plane of refraction and fully-reflected plane, wherein described the
One plane of refraction and second plane of refraction are not parallel；
The detection unit includes photodetector；
The laser through the beam splitter beam splitting launched by the laser, is coupled by the directional coupler input respectively
Transmit to the collimater and expand by the optical fiber, afterwards into the powder concentration measurement unit, and respectively through first
After plane of refraction and the refraction of the second plane of refraction, through fully-reflected plane total reflection, reversely backtracking is to the orientation coupling
Clutch, by entering the photodetector after the output end coupling of the directional coupler.
2. powder concentration measurement system as claimed in claim 1, it is characterised in that：
The laser is divided into the first measurement light and the second measurement light that two-beam is strong identical and is parallel to each other by the beam splitter；
The directional coupler includes the first directional coupler and the second directional coupler；
The collimater includes first collimator and the second collimater；
The optical fiber includes the first optical fiber and the second optical fiber；
Measured zone is formed between the first refractive plane and second plane of refraction of the powder concentration measurement unit；
The photodetector includes the first photodetector and the second photodetector；
The first measurement light is transmitted to described after the first directional coupler input coupling through first optical fiber
First collimator is expanded, after enter the measured zone through the first refractive plane refraction, it is then flat through the described second refraction
Face reflect and the fully-reflected plane total reflection, then back through after the first collimator shrink beam through first optical fiber pass
First directional coupler is transported to, by entering first photodetection after the output end coupling of first directional coupler
Device；
The second measurement light is transmitted to described after the second directional coupler input coupling through second optical fiber
Second collimater is expanded, after enter the measured zone through the first refractive plane refraction, it is then flat through the described second refraction
Face reflect and the fully-reflected plane total reflection, then back through after the second collimater shrink beam through second optical fiber pass
Second directional coupler is transported to, by entering second photodetection after the output end coupling of second directional coupler
Device.
3. powder concentration measurement system as claimed in claim 2, it is characterised in that the first refractive plane, the second refraction are flat
Face and fully-reflected plane are provided by the first prism and the second prism.
4. powder concentration measurement system as claimed in claim 3, it is characterised in that first prism and second Rhizoma Sparganii
Mirror opposition is placed, wherein：
First prism be right angle prism, including the first right-angle surface, the second right-angle surface and be coated with anti-reflection film refraction it is oblique
Face；
Second prism includes being coated with the plane of refraction of anti-reflection film, being coated with the fully reflecting surface and the 3rd inclined-plane of the film that is all-trans；
Measure the first right-angle surface of the first prism described in light vertical incidence.
5. powder concentration measurement system as claimed in claim 4, it is characterised in that：
After the plane of refraction refraction on refraction inclined-plane and second prism of the first measurement light through first prism
The fully reflecting surface of second prism described in vertical directive, then along former incident route return after fully reflecting surface total reflection；
After the plane of refraction refraction on refraction inclined-plane and second prism of the second measurement light through first prism
The fully reflecting surface of second prism described in vertical directive, then along former incident route return after fully reflecting surface total reflection；
The first measurement light is parallel with the light path of the described second measurement light.
6. powder concentration measurement system as claimed in claim 4, it is characterised in that also including simple lens reshaper, the list is saturating
Mirror reshaper is arranged between the collimater and first prism.
7. powder concentration measurement system as claimed in claim 6, it is characterised in that the powder concentration measurement unit also includes bottom
Seat, wherein：
The first right-angle surface and the second right-angle surface of first prism are fixedly connected with the base；
3rd inclined-plane of second prism is fixedly connected with the base.
8. powder concentration measurement system as claimed in claim 7, it is characterised in that the first collimator and the described second collimation
Device is abreast embedded in the base, and vertical with the first right-angle surface of first prism.
9. powder concentration measurement system as claimed in claim 8, it is characterised in that it is single saturating that the simple lens reshaper includes first
Mirror reshaper and the second simple lens reshaper, wherein：
The first simple lens reshaper correspondence first collimator is embedded in the base；
The second simple lens reshaper correspondence, second collimater is embedded in the base.
10. powder concentration measurement system as claimed in claim 1, it is characterised in that the laser and the beam splitter are remote
The powder concentration measurement unit, the directional coupler and the photodetector are away from the powder concentration measurement unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720067264.8U CN206557060U (en) | 2017-01-18 | 2017-01-18 | A kind of powder concentration measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720067264.8U CN206557060U (en) | 2017-01-18 | 2017-01-18 | A kind of powder concentration measurement system |
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| CN206557060U true CN206557060U (en) | 2017-10-13 |
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| CN201720067264.8U Withdrawn - After Issue CN206557060U (en) | 2017-01-18 | 2017-01-18 | A kind of powder concentration measurement system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108196294A (en) * | 2017-12-26 | 2018-06-22 | 中国计量科学研究院 | A kind of X ray air attenuation coefficient detecting system |
| CN108844870A (en) * | 2018-08-08 | 2018-11-20 | 重庆交通大学 | PM based on optical fiber structure10And PM2.5Detection instrument device and system |
-
2017
- 2017-01-18 CN CN201720067264.8U patent/CN206557060U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108196294A (en) * | 2017-12-26 | 2018-06-22 | 中国计量科学研究院 | A kind of X ray air attenuation coefficient detecting system |
| CN108844870A (en) * | 2018-08-08 | 2018-11-20 | 重庆交通大学 | PM based on optical fiber structure10And PM2.5Detection instrument device and system |
| CN108844870B (en) * | 2018-08-08 | 2021-09-21 | 重庆交通大学 | PM based on optical fiber structure10And PM2.5Probe instrument apparatus and system |
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