CN1587985A - Scanning type nozzle atomizing field for drop grain size and concentration space distribution analyzer - Google Patents
Scanning type nozzle atomizing field for drop grain size and concentration space distribution analyzer Download PDFInfo
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- CN1587985A CN1587985A CN 200410053033 CN200410053033A CN1587985A CN 1587985 A CN1587985 A CN 1587985A CN 200410053033 CN200410053033 CN 200410053033 CN 200410053033 A CN200410053033 A CN 200410053033A CN 1587985 A CN1587985 A CN 1587985A
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Abstract
A diameter and density distribution analyzer of scanning nozzle atomizing fog drop is used in measuring instrument technical field, comprising programmable guide rail support, two microadjustment bearer, particle diameter and density optical sensor, A/D converter and computer. The particle diameter and density optical sensor is of isolating construction and consisted of transmitting terminal and receiving end which are installed on microadjustment bearer fixed on programmable guide rail support, electro optical signal 10 collected by transmitting terminal and receiving end is transferred to receiving end of A/D converter from which digital signal is transferred to computer. The invention is mainly used in atomizing field research of various nozzles, without special requirement to work medium of atomizing field, and it can even be used to measure special distribution of solid state particle diameter and density in jet stream with gas and solid two states, its has large sampling area, small measurement error of density, its measuring course is easy to be automation and experimental measurement period is short.
Description
Technical field
The present invention relates to the analyser that mist droplet particle size and concentration space distribute, particularly a kind of scan-type nozzle atomization field mist droplet particle size and concentration space distributional analysis instrument.Be used for the surveying instrument technical field.
Background technology
Nozzle is in many industrial circle extensive application such as chemical industry, the energy, environmental protection, the droplet particle of spraying and concentration and the nozzle usability is had a significant impact in the space distribution situation.The physical process of spraying simultaneously is very complicated, and present stage relies on theoretical method still to be difficult to accurately find the solution in the droplet field particle and concentration merely and in space distribution, experiment measuring is still one of main means in this class research and the application work.Spray process is a dynamic biphase gas and liquid flow process, and mist droplet particle size is little and exist all very limitedly on room and time, so the surveying work difficulty is very big.The scientific research personnel has carried out a large amount of research work to the spraying measuring technique in the last thirty years, has obtained some achievements.Wherein optical means has the characteristics of non-cpntact measurement, is specially adapted to the measurement such as the such gas-liquid band grain two-phase flow of droplet, occupies leading position in existing spraying measuring technique.
The most representative is laser phase Doppler (being called for short PDA or PDPA) technology, the researchist often utilizes it to come the spraying situation is studied, people such as Frank Puschmann have delivered " Transient measurement of heat transfer in metal quenching withatomized sprays " literary composition on 2004 28 volumes of periodical " Experimental Thermaland Fluid Science " (periodical Chinese " experiment is conducted heat and the fluid science "), this article has been introduced situation about the back droplet of spraying being measured in hot metal surface evaporation situation with PDA, studies droplet with this and conducts heat.The PDA technology is utilized and many focussed laser beam is incided the droplet surface from different directions, utilizes and asks for particle diameter from the phase differential of droplet surface scattering light wave.This instrument weak point in use is mainly reflected in: measurement zone is little, has also sacrificed the representativeness of measurement data when having high spatial resolution very, and it is bigger that measurement data is used for the calculating concentration time error; Be difficult to provide rational particle diameter for the aspherical particle measurement result and explain that the error that aspherical particle is measured is bigger; PDA is kind of a point measurement technology, and the measuring period of finishing a spray field is longer.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art and defective, a kind of scan-type nozzle atomization field mist droplet particle size and concentration space distributional analysis instrument are provided, the scan-type nozzle atomization field mist droplet particle size and the concentration space distributional analysis instrument that promptly utilize particle and concentration optical sensor and control guide rail bracket able to programme to constitute, it is big to make it have sample area, measurement result has higher representativeness in spatial domain, the measurement of concetration error is little, can obtain space each point mist droplet particle size and concentration, measuring process is easy to robotization, and the experiment measuring cycle is short.
The present invention is achieved through the following technical solutions, and the present invention includes: control guide rail bracket able to programme, two fine setting bearings, grain diameter and concentration optical sensors, A/D converter, computing machine.Wherein grain diameter and concentration optical sensor are isolating construction, constitute by transmitting terminal and receiving end, they are installed in respectively on the fine setting bearing, the fine setting bearing is fixed on the control guide rail bracket able to programme, the photosignal that transmitting terminal and receiving end collect is wired to the input end of A/D converter, and the digital signal of A/D converter output is transferred to computing machine by lead.
When the present invention works, spraying droplet is from the transmitting terminal of grain diameter and concentration optical sensor and the spatial flow mistake between the receiving end, utilize grain diameter and concentration optical sensor and control guide rail bracket able to programme to finish in the spray field measurement of droplet mean grain size and concentration on a series of straight lines, the change of position is finished by control guide rail bracket scanning able to programme when measuring different straight line, and when mist droplet particle size and concentration are measured on to straight line, control guide rail bracket able to programme is static, and each position measurements and locus coordinate are by computer recording.After finishing scanning to this spray field, by computing machine according to a series of mist droplet particle sizes of record and concentration measurement data and locus coordinate in conjunction with chromatography algorithm computation spray field mist droplet particle size and concentration in three-dimensional distribution.
Control guide rail bracket able to programme is the support and the fixed support of grain diameter and concentration optical sensor and fine setting bearing among the present invention, and it also determines the locus coordinate of each measurement straight line in the scanning to spray field along level and vertical direction.Be fixed with U type semi-girder on the control guide rail bracket able to programme, the front end of semi-girder is installed the fine setting bearing, spraying flow region when between the U type semi-girder being measurement.
The fine setting bearing is connecting control guide rail bracket able to programme and grain diameter and concentration optical sensor, about fine setting has on the bearing, left and right directions, the regulating device that horizontally rotates, be used to adjust the relative position of grain diameter and concentration optical sensor transmitting terminal and receiving end, the light beam that passes through spray field can correctly be received.
The transmitting terminal of grain diameter and concentration optical sensor and receiving end coaxial arrangement during measurement, the coaxial position between transmitting terminal and the receiving end require to realize by the regulatory function of fine setting bearing.Transmitting terminal comprises: reference light guiding fiber, spatial filter, beam-defining clipper, photoelectric commutator, amplifying circuit, semiconductor laser and packaging body.Receiving end comprises: convex lens, diaphragm, sight glass, photoelectric receiving device, signal amplification circuit and packaging body.Transmitting terminal packaging body and receiving end packaging body front and rear all have aperture, and they have constituted the passage of protection air.The protection air is used for isolating pollutant, and the aperture of front also is the passage of measuring with light beam simultaneously, and the simulating signal of grain diameter and collection of concentration optical sensor and processing is input to A/D converter via lead.
Laser instrument is the energy source of total system measuring-signal, and in order to reduce grain diameter and concentration optical sensor size, transmitting terminal adopts semiconductor laser; The light energy signal of the reference light conduction collecting fiber in the transmitting terminal to photoelectric commutator, is converted to electric signal by light signal via Optical Fiber Transmission; Electric signal is input to amplifying circuit and amplifies to be suitable for transmission, and this electric signal is used for revising in the measuring process because the pulsation of the incident intensity that all factors cause; Spatial filter is used for rejecting high-order mode parasitic light in the laser, improves the quality of measuring with incident beam; Utilize beam-defining clipper to obtain measuring the required diameter light beam, improve measuring accuracy; Packaging body is when playing the effect of protection internal components, also as the web member with the fine setting bearing.Convex lens are used for transmitted light is carried out Fourier transform; Diaphragm is used for rejecting the droplet scattered light, guarantees the reception of transmitted light; Photoelectric commutator is converted to electric signal with the optical signal transmissive that receives, and makes things convenient for Signal Processing; Amplifying circuit amplifies the photoelectric commutator electrical signal converted, makes it be suitable for transmitting from lead; Can observe transmitted light beam through the focusing situation on diaphragm behind the convex lens by the sight glass operating personnel, make things convenient for the adjustment work of analyser light path; The protection air is used to prevent that droplet and other dust granule from entering transmitting terminal or receiving end inside by aperture.
A/D converter is converted to digital quantity with the electric signal that grain diameter and concentration optical sensor measure by analog quantity, make its can be on remote transmission and be suitable for Computer Processing; The electric signal that has obtained expression reference light intensity and transmitted intensity respectively in the transmitting terminal and the receiving end inside of grain diameter and concentration optical sensor, it is digital signal that above-said current signal is input to the A/D converter internal conversion respectively, and these digital signals are input to computing machine via lead.
Computing machine is by instruction control control guide rail bracket able to programme moving in the horizontal and vertical directions, reception is calculated mist droplet particle size and concentration from the reference optical signal of grain diameter and concentration optical sensor transmitting terminal and receiving end input and optical signal transmissive and according to corresponding theory, and coordinate figure and the mist droplet particle size and the concentration of each measuring position of responsible record, then according to the position coordinates of chromatographic theory and scanning process survey record, mist droplet particle size, concentration data, calculate the particle diameter and the CONCENTRATION DISTRIBUTION of three dimensions droplet, the result is stored in the computing machine, and export by certain way, analyze for the relevant personnel.
The present invention organically combines grain diameter and concentration optical sensor, control guide rail bracket able to programme, computing machine, make system have the ability that spray field is scanned, measure mist droplet particle size and concentration on each bar straight line by grain diameter and concentration optical sensor simultaneously, in conjunction with the record and the arithmetic capability of computing machine, solve spray field particle diameter and concentration then in three-dimensional distribution.Compare with existing spraying measuring technique and to have following advantage: sample area is big, analyser is probe with the parallel beam, by its spray area that illuminates is measurement zone, volume than the PDA measurement zone increases manyfold, measurement result has higher representativeness in spatial domain, simultaneously by on the multi straight to the droplet sampled measurements and in conjunction with the chromatography algorithm, can calculate the mist droplet particle size and the concentration of space each point; With the projected area of droplet its particle diameter that converts, reduced of the influence of non-spherical droplet to measurement result; The present invention can be used for measuring, analyze near the liquid division of nozzle atomization process, for change of size situation in the research spraying complex region provides measurement means; Measuring process is carried out with the scanning form, and data acquisition, analysis easily are automated; The experiment measuring cycle to whole nozzle atomization field is short.
Description of drawings
Fig. 1 general structure synoptic diagram of the present invention
Fig. 2 the present invention finely tunes the seat structure synoptic diagram
Fig. 3 grain diameter of the present invention and concentration optical sensor transmitting terminal structural representation
Fig. 4 grain diameter of the present invention and concentration optical sensor receiving end structural representation
Embodiment
As Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, the present invention includes: control guide rail bracket 1 able to programme, grain diameter and concentration optical sensor 2, two fine setting bearings 3, A/D converter 6, computing machine 7, grain diameter and concentration optical sensor 2 are isolating construction, constitute by transmitting terminal 4 and receiving end 5, they are set at respectively on two fine setting bearings 3, two fine setting bearings 3 are separately fixed on the control guide rail bracket 1 able to programme, the photosignal that transmitting terminal 4 and receiving end 5 are gathered is wired to the input end of A/D converter 6, and the digital signal of A/D converter output is transferred to computing machine 7 by lead.
Control guide rail bracket 1 able to programme has U type semi-girder 8, U type semi-girder 2 front ends are respectively arranged with fine setting bearing 3, the transmitting terminal 4 of grain diameter and concentration optical sensor 2 and receiving end 5 are arranged on the fine setting bearing 3, have constituted the zone that spraying is flowed between transmitting terminal 4 and the receiving end 5.
Fine setting bearing 3 is used to connect the transmitting terminal 4 and the receiving end 5 of control guide rail bracket 1 able to programme and grain diameter and concentration optical sensor 2, about fine setting has on the bearing 3, left and right directions translation, the regulating device that horizontally rotates, be used to adjust the relative position of 5 of transmitting terminal 4 and receiving ends, guarantee the correct reception of transmitted light beam.Fine setting bearing 3 by securing member 9, vertical direction micromatic setting 10, connect base 11, horizontally rotate part 12, horizontally rotate bolt 13, the left and right directions trimming bolt to 14, move horizontally part 15, support member 16 is formed.Fine setting bearing 3 is connected on the control guide rail bracket 1 able to programme by connecting base 11; By the relative position of the bolt on vertical direction micromatic setting 10, the left and right horizontal direction, make after the light beam line focus of transmitting terminal 4 ejaculations accurately to enter in the diaphragm of receiving end 5 to 14 adjusting transmitting terminals 4 and receiving end 5; Horizontally rotate trimming bolt and regulate the incident angle of light beam, further guarantee the reception fully of transmitted light with respect to diaphragm to 13; Securing member 9 has the through hole that has breach of support member 16 tops processing and bolt to constitute, through-hole diameter is slightly larger than the transmitting terminal 4 and receiving end 5 external diameters of grain diameter and concentration optical sensor, because the elasticity of material, through-hole diameter dwindles when tighting a bolt, and grain diameter and concentration optical sensor are clamped.Horizontally rotate part 12 and be connected base 11 usefulness clearance fit and be connected, horizontally rotate trimming bolt and be threaded with being connected base 11 usefulness, horizontally rotate trimming bolt and make in its certain angle on surface level and rotate by acting on the crossette that horizontally rotates on the part 12 13 to 13; Move horizontally part 15 and utilize dovetail groove same level tumbler 12 to be connected, can regulate moving horizontally part 15 position in the horizontal direction by bolt to 14; Support member 16 utilizes with vertical direction micromatic setting 10 and is threaded, and when regulating vertical direction micromatic setting 10, support member 16 is motion together thereupon, thereby adjusting grain diameter and concentration optical sensor are in the position of vertical direction.
Transmitting terminal 4 comprises: amplifying circuit 17, photoelectric commutator 18, semiconductor laser 19, reference light guiding fiber 20, spatial filter 21, beam-defining clipper 22 and packaging body 23, its connected mode is: it is other that reference light guiding fiber 20 is fixed on semiconductor laser 19, spatial filter 21, beam-defining clipper 22, semiconductor laser 19 are arranged in order, be encapsulated in the packaging body 23, photoelectric commutator 18, amplifying circuit 17 are installed in packaging body 23 rear portions.
Receiving end 5 comprises: packaging body 24, convex lens 25, sight glass 26, diaphragm 27, photelectric receiver 28 and signal amplification circuit 29, the distance that convex lens 25 and diaphragm are 27 equals the focal length of convex lens.Its connected mode is: convex lens 25, diaphragm 27, photelectric receiver 28, signal amplification circuit 29 are encapsulated in packaging body 24 inside, convex lens 25 are fixed on the packaging body 24 by web member, diaphragm 27 utilizes binding thread to be fixed in packaging body 24 stepped holes, sight glass 26 is installed on the sidewall of packaging body 24, observes the reception condition of focused transmission light when being used to debug light path.Transmitting terminal 4 and receiving end 5 coaxial arrangement during measurement, all there is aperture in transmitting terminal packaging body and receiving end packaging body rear portion and front, and they have constituted the passage of protection air, and positive simultaneously aperture also is the passage of light beam.
Provide following examples in conjunction with content of the present invention:
Nozzle is widely used at scientific research and all types of industries production field, the particle diameter of nozzle ejection droplet and concentration and usability is had a significant impact in space distribution.Simultaneously spray process is extremely complicated, and experiment is still one of important method of present spraying research, and the present invention can provide the equipment of experiment measuring mist droplet particle size and concentration and space distribution thereof for researchist and engineering technical personnel, and its implementation method is as follows:
Build the spraying experiment table, nozzle is fixed on certain height, spray direction is downward.Control guide rail bracket 1 able to programme is placed the experiment table correct position, make the spatial flow mistake of spraying from 8 of the semi-girders of control guide rail bracket able to programme, and when guaranteeing control guide rail bracket level able to programme and vertical moving, be fixed on the grain diameter on its semi-girder 8 and the axis of concentration optical sensor 2 and can scan the whole spaces that need to measure spray field fully.
As preliminary work, on computing machine 7, set the true origin of control guide rail bracket able to programme before measuring, and the stepping length when scanning in the horizontal and vertical directions according to the given control guide rail bracket 1 able to programme of experiment needs, measure then.During measurement, control guide rail bracket 1 able to programme stops the regular hour on each stepping length, by the particle diameter and the concentration of droplet on grain diameter and concentration optical sensor 2 these position straight lines of measurement, the mist droplet particle size that measures, concentration data and spatial position data all are recorded in computing machine 7 inside; Control guide rail bracket able to programme moves to next measuring position according to the previous scanning step of determining after finishing this point measurement, so repeatedly, finishes the scanning to spray field.Utilize at last particle diameter, concentration and the spatial data of said process record, go out mist droplet particle size and concentration in spatial distributions according to corresponding algorithm computation by computing machine 7.
Claims (7)
1, a kind of scan-type nozzle atomization field mist droplet particle size and concentration space distributional analysis instrument, comprise: control guide rail bracket able to programme (1), grain diameter and concentration optical sensor (2), fine setting bearing (3), A/D converter (6), computing machine (7), it is characterized in that, grain diameter and concentration optical sensor (2) are isolating construction, constitute by transmitting terminal (4) and receiving end (5), they are set at respectively on the fine setting bearing (3), fine setting bearing (3) is fixed on the control guide rail bracket able to programme (1), the signal that transmitting terminal (4) and receiving end (5) are measured is wired to the input end of A/D converter (6), and the output terminal of A/D converter (6) is connected to computing machine (7).
2, scan-type nozzle atomization field mist droplet particle size according to claim 1 and concentration space distributional analysis instrument, it is characterized in that: control guide rail bracket able to programme (1) has U type semi-girder (8), U type semi-girder (2) front end is separately installed with fine setting bearing (3), transmitting terminal of grain diameter and concentration optical sensor (4) and receiving end (5) are installed on the fine setting bearing (3), have constituted the zone that spraying is flowed between transmitting terminal (4) and the receiving end (5).
3, scan-type nozzle atomization field mist droplet particle size according to claim 1 and concentration space distributional analysis instrument, it is characterized in that: fine setting bearing (3) connects transmitting terminal (4) and the receiving end (5) of control guide rail bracket able to programme (1) and grain diameter and concentration optical sensor (2), finely tunes about having on the bearing (3), left and right directions translation, the regulating device that horizontally rotates.
4, according to claim 1 or 3 described scan-type nozzle atomization field mist droplet particle size and concentration space distributional analysis instrument, it is characterized in that: fine setting bearing (3) specifically comprises: securing member (9), vertical direction micromatic setting (10), connect base (11), horizontally rotate part (12), horizontally rotate bolt (13), the left and right directions trimming bolt is to (14), move horizontally part (15), support member (16), fine setting bearing (3) is connected on the control guide rail bracket able to programme (1) by connecting base (11), vertical direction is provided with micromatic setting (10), the left and right horizontal direction is provided with bolt to (14), horizontally rotate trimming bolt to (13) be connected base (11) with being threaded, horizontally rotate part (12) and be connected base (11) and be connected with clearance fit, moving horizontally part (15) utilizes dovetail groove same level tumbler (12) to be connected, securing member (9) has the through hole that has breach of support member (16) top processing and bolt to constitute, through-hole diameter is slightly larger than the transmitting terminal (4) and receiving end (5) external diameter of grain diameter and concentration optical sensor, and support member (16) is threaded with vertical direction micromatic setting (10) utilization.
5, scan-type nozzle atomization field mist droplet particle size according to claim 1 and concentration space distributional analysis instrument, it is characterized in that: transmitting terminal (4) comprising: amplifying circuit (17), photoelectric commutator (18), semiconductor laser (19), reference light guiding fiber (20), spatial filter (21), beam-defining clipper (22) and packaging body (23), its connected mode is: it is other that reference light guiding fiber (20) is fixed on semiconductor laser (19), spatial filter (21), beam-defining clipper (22), semiconductor laser (19) is arranged in order, be encapsulated in the packaging body (23) photoelectric commutator (18), amplifying circuit (17) is installed in packaging body (23) rear portion.
6, scan-type nozzle atomization field mist droplet particle size according to claim 1 and concentration space distributional analysis instrument, it is characterized in that: receiving end (5) comprising: packaging body (24), convex lens (25), sight glass (26), diaphragm (27), photelectric receiver (28) and signal amplification circuit (29), the distance between convex lens (25) and diaphragm (27) equals the focal length of convex lens.Its connected mode is: convex lens (25), diaphragm (27), photelectric receiver (28), signal amplification circuit (29) are encapsulated in packaging body (24) inside, convex lens (25) are fixed on the packaging body (24) by web member, diaphragm (27) utilizes binding thread to be fixed in packaging body (24) stepped hole, and sight glass (26) is arranged on the sidewall of packaging body (24).
7, scan-type nozzle atomization field mist droplet particle size according to claim 3 and concentration space distributional analysis instrument; it is characterized in that: during measurement; transmitting terminal (4) and receiving end (5) coaxial arrangement; all there is aperture in transmitting terminal packaging body and receiving end packaging body rear portion and front; they have constituted the passage of protection air, and positive simultaneously aperture also is the passage of light beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053033 CN1258080C (en) | 2004-07-22 | 2004-07-22 | Scanning type nozzle atomizing field for drop grain size and concentration space distribution analyzer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053033 CN1258080C (en) | 2004-07-22 | 2004-07-22 | Scanning type nozzle atomizing field for drop grain size and concentration space distribution analyzer |
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| CN1587985A true CN1587985A (en) | 2005-03-02 |
| CN1258080C CN1258080C (en) | 2006-05-31 |
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| CN 200410053033 Expired - Fee Related CN1258080C (en) | 2004-07-22 | 2004-07-22 | Scanning type nozzle atomizing field for drop grain size and concentration space distribution analyzer |
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| CN108195637A (en) * | 2018-01-23 | 2018-06-22 | 湘潭大学 | Water mist sampling apparatus and water smoke parameter detection device and detection method in large space |
| CN108195637B (en) * | 2018-01-23 | 2023-11-24 | 湘潭大学 | Water mist sampling device in large space, water mist parameter detection device and detection method |
| CN111175200A (en) * | 2020-01-15 | 2020-05-19 | 浙江大学 | Method and device for predicting volume pitch diameter of droplets in spray surface superposition area of spray head |
| CN111678847A (en) * | 2020-06-12 | 2020-09-18 | 中国人民解放军战略支援部队航天工程大学 | Two-dimensional spray field particle size distribution detection device |
| CN112985920A (en) * | 2021-03-05 | 2021-06-18 | 农业农村部南京农业机械化研究所 | Fog droplet collection system |
| CN112985920B (en) * | 2021-03-05 | 2021-10-22 | 农业农村部南京农业机械化研究所 | Fog droplet collection system |
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