CN104181083A - Spray characteristic parameter detection device and method - Google Patents
Spray characteristic parameter detection device and method Download PDFInfo
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- CN104181083A CN104181083A CN201410426094.9A CN201410426094A CN104181083A CN 104181083 A CN104181083 A CN 104181083A CN 201410426094 A CN201410426094 A CN 201410426094A CN 104181083 A CN104181083 A CN 104181083A
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Abstract
The invention discloses a spray characteristic parameter detection device and method. The spray characteristic parameter detection device comprises an integral support rack, a two-dimensional moving unit, a servo motor, a servo control unit, a spray control system, a pulse nozzle, a high-speed camera image acquisition system and a laser particle size analyzer system. On the basis of the device, the spray characteristic parameter detection method comprises the following steps: detecting an outline shape of spray, macroscopic two-dimensional distribution of spray and the flying speed of particles of spray by virtue of the high-speed camera image acquisition system; and detecting the particle size of spray with two-dimensional distribution in a spatial two-dimensional plane travel range by a two-dimensional precise servo driving system based on a laser particle size analyzer according to the outline and the macroscopic two-dimensional distribution of spray on the basis of a spray image acquisition result.
Description
Technical field
The present invention relates to detecting instrument technical field, particularly spray characteristics parameter detection device and method in a kind of bio-based materials forming technique and equipment field.
Background technology
Packing is the independent element of food manufacturing process, brings convenience to people's lives.Green package is to realize Sustainable Development in Packaging Industry, the important channel of the problem of environmental pollution that minimizing brings because of packing, edible packing membrane and vegetables sill, with superiority such as its raw material sources are abundant, sustainable, edible, pollution-free, become a large focus of emerging packaging field research.Vegetables extrusion coating paper soybean protein solution spraying technology, adopt protein liquid electronic impulse spraying method, by the correlation parameter such as flow, air pressure, hydraulic pressure of Pulse Spraying is set, specific proportioning protein solution is sprayed by high-frequency impulse nozzle, form fan-spray, be coated on relevant base material, through oven dry, shaping, form compound package material.The physical process of spraying atomization, the correlated performance index of direct relation compound substance.The homogeneity of spraying, the consistance of particle diameter, spraying granule Spatial Density Distribution, the profile of spraying, the performance parameters such as the speed of spray particle have direct and important impact to the performance of final overlay film.The particle size of fan-spray particle, Density Distribution, the physical parameters such as particle rapidity, not only relevant with shower nozzle physical arrangement, simultaneously directly related with spray pressure, hydraulic pressure, flow and nozzle pulsed frequency.For the atomization of spraying under different parameters, need to design a large amount of control experiments.Not only will measure the contour shape of spraying, spray particle speed, also needs the particle diameter of research spraying to distribute.
Because spraying itself exists the physical characteristics of biphase gas and liquid flow, in space, distribute comparatively complicated.Inner at fan-spray profile, the space density of spraying, the profile of spraying, spray particle speed and particle diameter distribute and change along with the variation of spray parameters.Under a certain definite spray parameters condition, the particle diameter of spraying distributes, profile, spray particle speed and the fan-spray Spatial Density Distribution of spraying form certain dynamic steady state.Researchist utilize high-speed camera obtain spraying profile, calculate spray particle speed; Utilize laser particle analyzer the relevant particle size of certain definite position of spraying in space can be detected.Fan-spray is in space, and the spray particle diameter of diverse location and speed exist different distribution characters.Be confined to the use-pattern of high-speed camera and laser particle analyzer equipment, be difficult to be moved to realize each position in spraying profile is measured in real time, and then be difficult to explain spray characteristics and the atomization situation whole in space of being sprayed at simultaneously from both macro and micro.
Summary of the invention
The object of the invention is to solve the limitation and deficiency of from both macro and micro, observing spray atomization situation detection technique simultaneously, a kind of fan-spray characterisitic parameter pick-up unit and method are provided.The image macroscopic view collecting based on high-speed camera obtains the appearance profile of spraying, and process by computing machine spray angle and the spray particle speed of obtaining, by laser particle analyzer, detect particle diameter, the motion detection device of invention two-dimensional scan simultaneously and method, make the impulse jet nozzle can be along vertically and horizontal direction and accurately moving at high-speed camera and laser particle analyzer between the two.
A kind of spray characteristics parameter detection device of the present invention, comprises two-dimensional scan pick-up unit, laser particle size instrument system and high-speed camera image capturing system; Described two-dimensional scan pick-up unit comprises support stand, two-dimensional movement unit, linear module, grating scale, servo drive unit and servo control unit; Described laser particle size instrument system is partly comprised of laser light source part and laser pick-off, and described laser light source part comprises LASER Light Source and light source adjustment platform, mounted lens in LASER Light Source; Laser pick-off partly comprises laser pickoff, camera lens, pin hole and receiver adjustment platform, and camera lens is arranged on the front end of laser receptacle, and pin hole is installed on the adjustment platform top in camera lens the place ahead;
Described support stand is fixedly comprised of left base, right base, left standing frame, right standing frame, crossbeam, underframe and bracing frame; Two-dimensional movement unit is comprised of horizontal linear guide rail, left vertical guide rail, right vertical guide rail and underframe line slideway; Horizontal linear guide rail is fixed on bracing frame leading flank, and grating scale is fixed on bracing frame upper surface, and horizontal linearity module is installed in horizontal linear guide rail, and mobile platform and horizontal linearity module are fixed, and nozzle is arranged on mobile platform, and nozzle connects spraying control system; Left vertical guide rail is fixed on left standing frame, left vertical linearity module is fixed in left vertical guide rail, right vertical guide rail is fixed on right standing frame, right vertical linearity module is fixed in right vertical guide rail, the two ends of bracing frame are arranged at respectively in left vertical guide rail and right vertical guide rail, and the lateral surface of left standing frame and right standing frame is installed respectively grating scale; On underframe, be installed with the underframe line slideway of the linear module of underframe, underframe leading flank is installed grating scale, and the bottom of left standing frame and right standing frame is individually fixed in the linear module of underframe; Mobile platform is installed image calibration plate;
Servo drive unit takes motor by the private that drives the vertical mobile servomotor in a left side that moves horizontally servomotor, driving bracing frame of nozzle, right vertical mobile servomotor and driving left standing frame and right standing frame and forms, and servo control unit is controlled servo drive unit; Servo control unit connects controls computing machine, and laser pickoff connects controls computing machine;
Described high-speed camera image capturing system is comprised of high-speed camera, light source and pattern process computer, and high-speed camera is positioned at over against nozzle location, and high-speed camera connects pattern process computer; High-speed camera is arranged on and arranges on the tripod 20 of adjusting The Cloud Terrace 19;
Laser light source part and laser pick-off part of horizontal are opposed, nozzle is placed in the upper position in space between laser light source part and laser pick-off part, spraying is ejection vertically downward, utilizes the movement of nozzle, and the spray particle diameter two-dimensional scan realizing based on laser particle analyzer detects.
Described linear module drives based on ball-screw, described horizontal linear guide rail, left vertical guide rail, right vertical guide rail and and underframe line slideway two ends extreme position stop is installed respectively.
Described servo drive unit is connected servomotor by shaft coupling with linear module.
Spray characteristics parameter detection method of the present invention, carries out according to following step:
S1: the impulse jet nozzle that installation need to be tested, and adjust impulse jet nozzle position, guarantee impulse jet nozzle vertically downward;
S2: install to regulate high-speed camera, adjust impulse jet nozzle position, make impulse jet nozzle and high-speed camera over against position;
S3: install and regulate laser particle analyzer, and guarantee have enough spaces can place spray characteristics parameter detection device between laser particle analyzer two split parts;
S4: start control computing machine and drive servomotors to make left standing frame and right standing frame and bracing frame coordinate high-speed camera by level of control traveling priority unit and two vertical straight line mobile units, in rational height; By level of control traveling priority unit drives servomotor, make impulse jet nozzle coordinate high-speed camera, in correct position; Start pattern process computer, adjust the focal length of high-speed camera, reasonably arrange the position of light source and regulate its brightness, collect clearly the image of image calibration plate, improve measuring accuracy;
S5: afterwards, by controlling computer control horizontal linear mobile unit and two vertical straight line mobile units, drive servomotor to make left standing frame and right standing frame and bracing frame coordinate laser particle analyzer, in rational height; By controlling underframe traveling priority unit, drive servomotor to make impulse jet nozzle coordinate laser particle analyzer, in laser particle analyzer launch laser directly over;
S6: start spraying control system, spray pressure, hydraulic pressure are set, and the frequency of Pulse Spraying;
S7: after spraying is stable, start mobile unit, be recorded in different spray pressures, hydraulic pressure, and the image that under the frequency of Pulse Spraying, high-speed camera collects, by pattern process computer, process, the contour shape spreading of spray that can obtain spraying, spraying granule flying speed and can find out intuitively spraying macroscopical Two dimensional Distribution; On the basis of spraying image collection result, according to spraying profile and macroscopical Two dimensional Distribution, according to the path designing, adjust the relative position that nozzle and laser particle analyzer send laser, on basis above, measure spray particle diameter;
S8: the distance at every turn moving, and decided in its sole discretion by operator in the time of a certain position stop.Mobile bee-line is determined by the simulation angle of servomotor feedback unit, is guaranteeing that under the shortest time conditions of collection high-speed camera and laser particle analyzer, the residence time can be set arbitrarily;
S9: repeating step S1-S8, tests the spray parameters under different spray parameters conditions.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention can full-automatic regulation nozzle position and the parameter such as spray pressure, hydraulic pressure, flow and nozzle pulsed frequency, can realize impulse jet nozzle in high-speed camera and laser particle analyzer movement between the two, can utilize high-speed camera and laser particle analyzer accurately to measure spray parameters, and automaticity is high, simple to operate, measurement result precision is high.
The present invention adopts the design of electromechanical integration, and whole process can be undertaken by computer control, and test result directly prints with the form of report and picture.Test findings can be saved in database, can in database, check the spray parameters under different impulse jet nozzles and different condition, compares, thereby obtains being suitable for producing actual impulse jet nozzle and running parameter.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, two-dimensional scan pick-up unit, laser particle size instrument system and high-speed camera image capturing system; Described two-dimensional scan pick-up unit comprises support stand, two-dimensional movement unit, linear module, grating scale, servo drive unit and servo control unit;
Described laser particle size instrument system is partly comprised of laser light source part and laser pick-off, and described laser light source part comprises LASER Light Source 28 and light source adjustment platform 14, mounted lens in LASER Light Source; Laser pick-off partly comprises laser pickoff 13, camera lens 16, pin hole and receiver adjustment platform, and camera lens is arranged on the front end of laser receptacle, and pin hole is installed on the adjustment platform top in camera lens the place ahead;
Described support stand is fixedly comprised of left base 38, right base 23, left standing frame 39, right standing frame 10, crossbeam 7, underframe 25 and bracing frame 32; Two-dimensional movement unit is comprised of horizontal linear guide rail, left vertical guide rail, right vertical guide rail and underframe line slideway; Horizontal linear guide rail is fixed on bracing frame leading flank, grating scale 31 is fixed on bracing frame upper surface, and horizontal linearity module 33 is installed in horizontal linear guide rail, and mobile platform and horizontal linearity module are fixed, nozzle 36 is arranged on mobile platform 37, and nozzle connects spraying control system; Left vertical guide rail is fixed on left standing frame, left vertical linearity module 5 is fixed in left vertical guide rail, right vertical guide rail is fixed on right standing frame, right vertical linearity module 34 is fixed in right vertical guide rail, the two ends of bracing frame are arranged at respectively in left vertical guide rail and right vertical guide rail, and the lateral surface of left standing frame and right standing frame is installed respectively grating scale 6,11; On underframe, be installed with the underframe line slideway of the linear module of underframe, underframe leading flank is installed grating scale 26, and the bottom of left standing frame and right standing frame is individually fixed in the linear module 21 of underframe; Mobile platform is installed image calibration plate 35; Extreme position stop 2,4,9,22 is installed respectively at the two ends of horizontal linear guide rail, left vertical guide rail, right vertical guide rail and underframe line slideway;
Servo drive unit takes motor by the private that drives the vertical mobile servomotor in a left side that moves horizontally servomotor, driving bracing frame of nozzle, right vertical mobile servomotor and driving left standing frame and right standing frame and forms, and servo control unit 30 is controlled servo drive units; Servo control unit connects controls computing machine 29, and laser pickoff connects controls computing machine;
Described high-speed camera image capturing system is comprised of high-speed camera 17, light source 27 and pattern process computer 18, and high-speed camera is positioned at over against nozzle location, and high-speed camera connects pattern process computer;
Laser light source part and laser pick-off part of horizontal are opposed, nozzle is placed in the upper position in space between laser light source part and laser pick-off part, spraying is ejection vertically downward, utilizes the movement of nozzle, and the spray particle diameter two-dimensional scan realizing based on laser particle analyzer detects.
The spray characteristics parameter detection method that uses said apparatus, carries out according to following step:
S1: the impulse jet nozzle 36 that installation need to be tested, and adjust impulse jet nozzle 36 positions, guarantee impulse jet nozzle 36 vertically downward;
S2: install to regulate high-speed camera 17, adjust impulse jet nozzle 36 positions, make impulse jet nozzle 36 and high-speed camera 17 over against position;
S3: install and regulate laser particle analyzer, and guarantee have enough spaces can place spray characteristics parameter detection device between laser particle analyzer two split parts;
S4: start control computing machine 29 and drive servomotors 24,3,8 to make left standing frame and right standing frame 39,10 and bracing frame 32 coordinate high-speed cameras 17 by level of control traveling priority unit and two vertical straight line mobile units, in rational height; By level of control traveling priority unit drives servomotor 1, make impulse jet nozzle 36 coordinate high-speed camera 17, in correct position; Start pattern process computer 18, adjust the focal length of high-speed camera 17, reasonably arrange the position of light source 27 and regulate its brightness, collect clearly the image of image calibration plate 35, improve measuring accuracy;
S5: afterwards, by controlling computing machine 29 level of control traveling priority unit and two vertical straight line mobile units, drive servomotor 24,3,8 to make left standing frame and right standing frame 39,10 and bracing frame 32 coordinate laser particle analyzer, in rational height; By controlling underframe traveling priority unit, drive servomotor 1 to make impulse jet nozzle 36 coordinate laser particle analyzers, in laser particle analyzer launch laser directly over;
S6: start spraying control system 15, spray pressure, hydraulic pressure are set, and the frequency of Pulse Spraying;
S7: after spraying is stable, start mobile unit, be recorded in different spray pressures, hydraulic pressure, and the image that under the frequency of Pulse Spraying, high-speed camera 17 collects, by pattern process computer 18, process, the contour shape spreading of spray that can obtain spraying, spraying granule flying speed and can find out intuitively spraying macroscopical Two dimensional Distribution; On the basis of spraying image collection result, according to spraying profile and macroscopical Two dimensional Distribution, according to the path designing, adjust the relative position that nozzle and laser particle analyzer send laser, on basis above, measure spray particle diameter;
S8: the distance at every turn moving, and decided in its sole discretion by operator in the time of a certain position stop.Mobile bee-line is determined by the simulation angle of servomotor feedback unit.Guaranteeing under the shortest time conditions of collection high-speed camera and laser particle analyzer.The residence time can be set arbitrarily;
S9: repeating step S1-S8, tests the spray parameters under different spray parameters conditions.
The present invention, by controlling servo drive unit 30, drives servomotor 1,3,8,24 accurately to move.Make impulse jet nozzle 36, can on the traveling priority unit of the traveling priority unit of vertically installing and level installation, vertically move with horizontal direction; Make left standing frame and right standing frame 39,10 move at high-speed camera 17 and laser particle analyzer between the two simultaneously.Utilize grating scale 6,11, the position probing of 26,31 pairs of traveling priority unit, obtains the exact position of mobile unit.
It is mobile with vertical (Y) that gating pulse nozzle 36 of the present invention can carry out level (X), and the moving range of impulse jet nozzle 36 in two vertical support stands 39,10 is: X:0-400mm Y:0-600mm; Controlling left standing frame and right standing frame 39,10 moves between the two at high-speed camera 17 and laser particle analyzer.
During high-speed camera 17 normal work, can take continuously the spraying image of nozzle, gather image, then by image pick-up card, image is carried out to noise processed, according to the noisiness filtering of image, improve signal to noise ratio (S/N ratio), obtain image more clearly and be shown on pattern process computer 18.The Two dimensional Distribution of finding out spraying that can be macroscopical by the image collecting, but the profile (spreading of spray) of spraying, owing to being subject to the impact of many factors, sometimes can not obtain spray angle accurately from single image.Therefore, by the multiple image collecting, by the matlab software on pattern process computer, calculate spreading of spray, get its mean value, can calculate the profile of spraying under certain condition.Select piece image wherein, by the matlab software on pattern process computer, can obtain on image spraying granule speed everywhere.
The result being collected by high-speed camera 17, can observe out from macroscopic view the situation of spray atomization.Under identical parameters condition, mobile two-dimensional movement unit, makes impulse jet nozzle 36 and laser particle analyzer in place, and while working, spraying droplet particle is in the camera lens 12 of laser particle analyzer and the spatial flow mistake between laser pickoff 13.Before detecting spray particle diameter, debug laser particle analyzer.First according to needed measurement range, select camera lens 12 and install, adjusting focal length centering, enables to collect background signal and shows normal afterwards; Camera lens multiple is divided into: 300,500,800,1000 times four kinds, according to surveyed particle diameter size, select suitable camera lens multiple.
When laser particle analyzer is normally worked, the light beam that laser instrument sends after filtering and after expanding, become collimated monochromatic ligth, just can produce diffraction of light phenomenon when this directional light is irradiated to the particle swarm in measured zone.Diffraction scattering light intensity is distributed in irradiated particle diameter and granule number in measurement zone relation.With receiver lens, be that fourier transform lens converges to diffraction scattering light on focal plane, on focal plane, place a polynary photodetector, be used for receiving diffraction luminous energy.Photodetector is generally comprised of 32 semicircular ring, and photodetector changes electric signal into the scattering luminous energy being irradiated on each anchor ring, the information that includes grain diameter size and distribute in these electric signal.Electric signal is sent into computing machine through data acquisition circuit, in data handling procedure, the calculating of luminous energy is adopted to normalized, the Size Distribution of particle is represented with percent simultaneously, multiunit detector has 32 rings, computing machine can solve the size-grade distribution of tested particle very soon according to the diffraction luminous energy of each ring by certain inversion algorithm, and generates relevant test report.
The present invention, by controlling the traveling priority unit of computing machine 29 accurate level of control directions, realizes impulse jet nozzle 36 along continuous straight runs and moves left and right, and laser particle analyzer can be measured mist droplet granularity size on every horizontal linear.By the bracing frame 32 of impulse jet nozzle is installed, on the two traveling priority unit of vertically installing, along vertical direction, move up and down, laser particle analyzer can be measured mist droplet granularity on every vertical direction.By servo electrical machinery system, realize nozzle and move in space two-dimensional plane, laser particle analyzer can all be measured spraying two-dimensional space size-grade distribution.Read relevant test report, from the angle of microcosmic, detect the atomization situation of spraying under certain condition.
Can require from main gate nozzle according to detailed programs the parameters such as while adjustable spraying air pressure, hydraulic pressure, flow and nozzle pulsed frequency.Different for the atomization of spraying under different parameters, need to design a large amount of control experiments, can determine the atomization situation of spraying.Macroscopic view, can select rapidly the good running parameter of atomization situation, from microcosmic, provide theoretical support again for selecting good atomization parameter, finally select homogeneity strong, particle diameter high conformity etc. are the running parameter of overlay film better.
Claims (4)
1. a spray characteristics parameter detection device, is characterized in that, comprises two-dimensional scan pick-up unit, laser particle size instrument system and high-speed camera image capturing system; Described two-dimensional scan pick-up unit comprises support stand, two-dimensional movement unit, linear module, grating scale, servo drive unit and servo control unit; Described laser particle size instrument system is partly comprised of laser light source part and laser pick-off, and described laser light source part comprises LASER Light Source and light source adjustment platform, mounted lens in LASER Light Source; Laser pick-off partly comprises laser pickoff, camera lens, pin hole and receiver adjustment platform, and camera lens is arranged on the front end of laser receptacle, and pin hole is installed on the adjustment platform top in camera lens the place ahead;
Described support stand is fixedly comprised of left base, right base, left standing frame, right standing frame, crossbeam, underframe and bracing frame; Two-dimensional movement unit is comprised of horizontal linear guide rail, left vertical guide rail, right vertical guide rail and underframe line slideway; Horizontal linear guide rail is fixed on bracing frame leading flank, and grating scale is fixed on bracing frame upper surface, and horizontal linearity module is installed in horizontal linear guide rail, and mobile platform and horizontal linearity module are fixed, and nozzle is arranged on mobile platform, and nozzle connects spraying control system; Left vertical guide rail is fixed on left standing frame, left vertical linearity module is fixed in left vertical guide rail, right vertical guide rail is fixed on right standing frame, right vertical linearity module is fixed in right vertical guide rail, the two ends of bracing frame are arranged at respectively in left vertical guide rail and right vertical guide rail, and the lateral surface of left standing frame and right standing frame is installed respectively grating scale; On underframe, be installed with the underframe line slideway of the linear module of underframe, underframe leading flank is installed grating scale, and the bottom of left standing frame and right standing frame is individually fixed in the linear module of underframe; Mobile platform is installed image calibration plate;
Servo drive unit is by driving the vertical mobile servomotor in a left side that moves horizontally servomotor, driving bracing frame of nozzle, right vertical mobile servomotor and driving the servomotor of left standing frame and right standing frame to form, and servo control unit is controlled servo drive unit; Servo control unit connects controls computing machine, and laser pickoff connects controls computing machine;
Described high-speed camera image capturing system is comprised of high-speed camera, light source and pattern process computer, and high-speed camera is positioned at over against nozzle location, and high-speed camera connects pattern process computer;
Laser light source part and laser pick-off part of horizontal are opposed, nozzle is placed in the upper position in space between laser light source part and laser pick-off part, spraying is ejection vertically downward, utilizes the movement of nozzle, and the spray particle diameter two-dimensional scan realizing based on laser particle analyzer detects.
2. spray particle diameter distribution two-dimensional scan pick-up unit according to claim 1, it is characterized in that, above-mentioned linear module drives based on ball-screw, and extreme position stop (2), (4), (9), (22) are installed respectively in the two ends of described horizontal linear guide rail, left vertical guide rail, right vertical guide rail and underframe line slideway.
3. spray particle diameter distribution two-dimensional scan pick-up unit according to claim 1, it is characterized in that, described servo drive unit is connected servomotor (1), (3), (8), (24) by shaft coupling with linear module (5), (21), (33), (34).
4. according to the spray characteristics parameter detection method described in claim 1-3 any one, it is characterized in that: according to following step, carry out:
S1: the impulse jet nozzle that installation need to be tested (36), and adjust impulse jet nozzle (36) position, guarantee impulse jet nozzle (36) vertically downward;
S2: install to regulate high-speed camera (17), adjust impulse jet nozzle (36) position, make impulse jet nozzle (36) and high-speed camera (17) over against position;
S3: install and regulate laser particle analyzer, and guarantee have enough spaces can place spray characteristics parameter detection device between laser particle analyzer two split parts;
S4: start and control computing machine (29) by level of control traveling priority unit and two vertical straight line mobile units driving servomotors (24,3,8) make left standing frame and right standing frame (39,10) and bracing frame (32) coordinate high-speed camera (17), in rational height; By level of control traveling priority unit drives servomotor (1), make impulse jet nozzle (36) coordinate high-speed camera (17), in correct position; Start pattern process computer (18), adjust the focal length of high-speed camera (17), reasonably arrange the position of light source (27) and regulate its brightness, collect clearly the image of image calibration plate (35), improve measuring accuracy;
S5: afterwards, by controlling computing machine (29) level of control traveling priority unit and two vertical straight line mobile units, drive servomotor (24,3,8) make left standing frame and right standing frame (39,10) and bracing frame (32) coordinate laser particle analyzer, in rational height; By controlling underframe traveling priority unit, drive servomotor (1) to make impulse jet nozzle (36) coordinate laser particle analyzer, in laser particle analyzer launch laser directly over;
S6: start spraying control system (15), spray pressure, hydraulic pressure are set, and the frequency of Pulse Spraying;
S7: after spraying is stable, start mobile unit, be recorded in different spray pressures, hydraulic pressure, and the image that under the frequency of Pulse Spraying, high-speed camera (17) collects, by pattern process computer (18), process the contour shape spreading of spray that can obtain spraying, spraying granule flying speed and can find out intuitively the macroscopical Two dimensional Distribution of spraying; On the basis of spraying image collection result, according to spraying profile and macroscopical Two dimensional Distribution, according to the path designing, adjust the relative position that nozzle and laser particle analyzer send laser, on basis above, measure spray particle diameter;
S8: the distance at every turn moving, and decided in its sole discretion by operator in the time of a certain position stop;
S9: repeating step S1-S8, tests the spray parameters under different spray parameters conditions.
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