CN201740735U - Calibration device of forward scattering cloud droplet particle detector - Google Patents
Calibration device of forward scattering cloud droplet particle detector Download PDFInfo
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- CN201740735U CN201740735U CN2010202812699U CN201020281269U CN201740735U CN 201740735 U CN201740735 U CN 201740735U CN 2010202812699 U CN2010202812699 U CN 2010202812699U CN 201020281269 U CN201020281269 U CN 201020281269U CN 201740735 U CN201740735 U CN 201740735U
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- dust particle
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Abstract
The utility model discloses a calibration device of a forward scattering cloud droplet particle detector, which comprises a three dimensional translation stage, a speed adjusting motor, a rotary circular disc, a diaphragm holder and a plurality of diaphragms with small apertures with apertures ranging from 5 Mum to 50 Mum; the speed adjusting motor is fixed on the three dimensional translation stage and moves forward to the exploring laser light transmitting direction and the vertical direction of the forward scattering cloud droplet particle detector along with the three dimensional translation stage; the rotary circular disc is fixedly connected with the rotating shaft of the speed adjusting motor through the center of a circle and rotates along with the rotating shaft of the motor; a screw hole is formed on the rotary circular disc; the diaphragm holder comprises a hollow cylindrical main body and a thread press, screw threads are formed on the outer edge of the main body, the diameter of the outer edge of the main body is in fit with the aperture of the screw hole on the rotary circular disc, and the main body and the rotary circular disc are connected and fixed through screw threads; and the external diameter of each diaphragm with a small aperture is in fit with the aperture of the inner bore of a diaphragm holder main body and is fixed in the diaphragm holder through the thread press. The utility model has the advantages of simple realization, low cost, good accuracy and repeatability and the like.
Description
Technical field
The utility model relates to the caliberating device of instrument, especially relates to the caliberating device of forward scattering water dust particle detector in the sub-measuring system of a kind of airborne cloud particle.
Background technology
Along with deepening continuously and develop of meteorological scientific research, meteorological observation ability and technological means have obtained great advance.Yet, speck reason observation for particles such as cloud, gasoloids, effective method is based on the direct surveying instrument of laser technology the most, wherein laser particle counter is a kind of instrumentation of measuring various particle diameters in the atmosphere and distribution thereof, purifies and field such as atmospheric science research is used increasingly extensive at environmental monitoring, air cleaning.Since the seventies in last century, the U.S. has developed the sub-measuring system of airborne cloud particle (PMS) of a cover robotization, and this cover instrument all is being greatly improved aspect automatic measurement and the detection accuracy at present.Though China is the big country of weather modification, not power, present airborne water dust particle detection mainly is from U.S.'s import.This measuring system comprises that four atmospheric particles sampling probes cover different measurement ranges respectively, and the total measurement range of this system is 0.1-6200 μ m.Forward scattering water dust particle detector (FSSP) is one of four probes of PMS water dust Particle Measuring Systems, and its range of size of carrying out the water dust particle measurement is 4-50 μ m.FSSP uses solid state laser as the laser lighting light source, and when water droplet in the cloud, when ice crystals passes illuminating bundle, to 4 π direction scatterings, system receives the forward scattering light of 4-13 ° of direction with light.The luminous energy of collecting is sent to the quality control passage by a certain percentage and measures passage, quality control is used for determining whether particle passes through from the zone of setting, measure passage and then judge the particle size size according to the light pulse amplitude of photodetector output electric signal, treatment circuit has the photo-impulses counting function simultaneously, therefore, the size distribution of particle can be measured by this system.But FSSP is as a kind of exact instrument, and measurement result often is subjected to external influence.At first FSSP is based on the optical instrument of laser, and alignment precision own requires high; Secondly, aircraft is when taking off or land, and the acceleration or the optics that can make system that jolts produce certain deformation, when this deformation can not recover fully, can influence light path; Once more, FSSP works in the clouds, freezes or condensation on the unavoidable glass window, and window pollution causes the transmitance of laser to reduce, and makes the numeric ratio actual value of measurement less than normal.Therefore, be the accuracy that guarantees that FSSP measures, need often system to be demarcated.
This instrument is demarcated by producer when dispatching from the factory at present, the standard particle that the daily demarcation of instrument then uses producer to provide carries out, this standard particle is actually the glass bead with fixed measure of special processing, daily timing signal, demarcation person at first makes FSSP enter duty, use rubber pipette bulb that the standard particle with certain size that producer provides is sucked then, will inhale the measured zone of ear outlet nozzle aligning FSSP at last and standard particle is sprayed.After the standard particle ejection, check whether instrument conforms to physical size to the output result of particle size, if conform to, this instrument can be observed use,, then need instrument to be finely tuned according to actual conditions if different.There is the problem of the following aspects in this scaling method: at first, the glass bead with fixed measure of this special processing is owing to processing difficulties, and cost is very expensive; Secondly, even if so expensive glass bead is difficult to also guarantee that each glass bead is that standard is spherical and conforms to nominal with size, if glass bead is non-sphere, then can run counter to the design concept of FSSP, if size can be brought error equally different with nominal; Once more, utilize glass bead to carry out timing signal, glass bead is sprayed by rubber pipette bulb, obviously, to compare difference very big for particle rapidity in the speed of glass bead and the actual measurement process, and this difference causes the photosignal time domain specification difference of receiving system, and electric signal will amplify before screening, time domain width difference causes the amplifying power difference of amplifier to signal, the error that generation speed causes.At last, because the difference of glass bead particle itself, and the difference in the rubber pipette bulb operating process, the poor repeatability of calibration process.
The utility model content
The purpose of this utility model be to provide a kind of with low cost, use simple and have the scaling method and the device of the forward scattering water dust particle detector of degree of precision.
Thinking of the present utility model is that the glass bead that utilizes aperture to replace using is at present demarcated according to the similarity of forward scattering water dust particle detector to particle Mie scattering and the response of aperture fraunhofer; The concrete technical scheme of the utility model is as follows:
A kind of scaling method of forward scattering water dust particle detector is characterized in that: use one group of pore diameter range to demarcate at the aperture simulation water dust particle of 5-50 μ m, be specially:
At first under the normal situation of forward scattering water dust particle detector, make aperture according to the search coverage of different speed by scattering water dust particle detector, obtain the measured value of different aperture diaphragms under each speed of scattering water dust particle detector output, obtain the standard calibration curve according to measured value;
Daily timing signal, make aperture according to the search coverage of different speed by scattering water dust particle detector, the measured value and the standard calibration curve of the output of scattering water dust particle detector are compared, as do not exceed predefined deviation, illustrate that then forward scattering water dust particle detector is in normal condition, can normally measure use; As exceed predefined deviation, and then adjust the opticator of forward scattering water dust particle detector, coincide up to its output and standard calibration curve.
Aperture in the technique scheme can be selected a plurality of different sizes in the 5-50 mu m range, the utility model selects for use the aperture to be respectively 5 μ m, 10 μ m, 6 apertures of 20 μ m, 30 μ m, 40 μ m, 50 μ m adopt ripe laser drilling very accurate the aperture to be controlled in the minimum error range.
Making aperture described in the technical solutions of the utility model is to realize by the following method according to the search coverage of different speed by forward scattering water dust particle detector: with aperture be installed in one with rotating circular disk that the rotating shaft of buncher links to each other on, by the rotating speed of adjustment buncher, thereby rotating circular disk rotates the drive aperture according to the search coverage of corresponding linear velocity by forward scattering water dust particle detector with motor.Certainly, also can pass through other similar fashion, as long as can make aperture according to the search coverage of predetermined speed by forward scattering water dust particle detector.
The scaling method of forward scattering water dust particle detector of the present utility model can pass through to realize with lower device:
A kind of caliberating device of forward scattering water dust particle detector is characterized in that: comprise D translation platform, buncher, rotating circular disk, diaphragm anchor clamps and the one group of pore diameter range aperture at 5-50 μ m; Buncher is fixed on the D translation platform and with the D translation platform and moves along the exploring laser light transmit direction of forward scattering water dust particle detector and with the exploring laser light vertical direction; Rotating circular disk is fixedlyed connected with the rotating shaft of buncher by the center of circle and is rotated with machine shaft; Have screw on the rotating circular disk; The diaphragm anchor clamps are made up of the cylinder-shaped body and the silk pressing of hollow, and the main body outer rim is carved with screw thread, and the screw aperture adapts and interconnects fixing by screw thread on main body external profile diameter and the rotating circular disk; Aperture external diameter and diaphragm jig main body internal orifice dimension adapt and are fixed in by silk pressing in the endoporus of diaphragm anchor clamps.
Compare existing scaling method, the aperture that the utility model adopts can be reused, and has avoided the high cost of using the special glass pearl to be produced, and use cost significantly reduces; Because the utility model has adopted buncher to drive aperture and has rotated, aperture can be adjusted arbitrarily by the speed of detector search coverage and can reach higher linear velocity, environment when approaching actual use more, therefore accuracy of demarcating and repeatability are better.
Description of drawings
Fig. 1 is the caliberating device structural representation of forward scattering water dust particle detector of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the technical solution of the utility model is elaborated:
As shown in Figure 1, the caliberating device of forward scattering water dust particle detector of the present utility model comprises D translation platform 1, buncher 3, rotating circular disk 4, diaphragm anchor clamps 5 and the one group of pore diameter range aperture 6 at 5-50 μ m; Buncher 3 is fixed on the D translation platform 1 and with D translation platform 1 by a translation stage-motor jockey 2 and moves along the exploring laser light transmit direction of forward scattering water dust particle detector and with the exploring laser light vertical direction; Rotating circular disk 4 is fixedlyed connected with the rotating shaft of buncher 3 by the center of circle and is rotated with machine shaft; Have screw on the rotating circular disk 4; Diaphragm anchor clamps 5 are made up of the cylinder-shaped body and the silk pressing of hollow, and the main body outer rim is carved with screw thread, and the screw aperture adapts and interconnects fixing by screw thread on main body external profile diameter and the rotating circular disk 4; Aperture 6 external diameters and diaphragm anchor clamps 5 main body internal orifice dimensions adapt and are fixed in by silk pressing in the endoporus of diaphragm anchor clamps 5.
In this embodiment, the aperture of aperture 6 is respectively 5 μ m, 10 μ m, and 20 μ m, 30 μ m, 40 μ m, 50 μ m adopt ripe laser drilling, can very accurate the aperture be controlled in the minimum error range.
Among this concrete enforcement side, the diameter of rotating circular disk 4 is 300mm, and thickness is 2mm, opens D shape hole in disc centre, is connected with the rotating shaft of buncher 3 and fixes by screw by D shape hole; Have a screw apart from center of circle 80mm place on the rotating circular disk 4, be used for installing diaphragm anchor clamps 5.
In this embodiment, buncher 3 adopts 20000 rev/mins of maximum (top) speeds, the buncher of continuously variable; Buncher 3 is fixed on the D translation platform 1 by a translation stage-motor jockey 2; Translation stage-motor jockey 2 is divided into base and compressing member two parts, and base portion is flat, and the bottom is opened the hole and is used for fixing on D translation platform 1, and top is between two parties according to the size open semicircle groove of buncher 3; The compressing member part is open semicircle shape groove also, is fixed on the base by flange, and compresses buncher 3.
In this embodiment, all drive on three movable directions of D translation platform 1, can accurately control and measure the displacement of D translation platform 1 by milscale by a milscale.
Use said apparatus to carry out timing signal, in accordance with the following methods:
At first utilize said apparatus at FSSP state (for example just dispatched from the factory or carried out demarcation) production standard calibration curve just often by producer, according to following steps:
1) selects an aperture, be installed on the rotating circular disk by the diaphragm anchor clamps;
2) moving three dimension translation stage makes aperture be in the measured zone of FSSP;
3) open FSSP, by the position of the fine setting of the milscale on D translation platform aperture, up to the output valve maximum of FSSP, at this moment, aperture is in the center of illuminating bundle and the center of FSSP measured zone;
4) open buncher, adjust motor speed, write down the output valve of FSSP under several rotating speeds respectively;
5) change aperture, repeat above-mentioned steps (4);
6) the output valve drawing standard calibration curve of each the aperture aperture FSSP under different rotating speeds that obtains more than the basis.
Daily timing signal can select one or more apertures to obtain a series of FSSP measured values according to above-mentioned (1)-(5) step arbitrarily according to the actual needs of demarcating, and the detail operations process is identical during with the making calibration curve, repeats no more herein; Measured value and standard calibration curve are compared, as do not exceed predefined deviation, illustrate that then forward scattering water dust particle detector is in normal condition, can normally measure use; As exceed predefined deviation, and then adjust the opticator of forward scattering water dust particle detector, coincide up to its output and standard calibration curve.
Utilize the caliberating device of forward scattering water dust particle detector of the present utility model, can also measure the depth of field of water dust particle detector, concrete grammar is as follows:
Select the aperture of 5 μ m for use, earlier aperture moved to the position at detector search coverage center, utilize the D translation platform, make aperture respectively before the detector optical axis direction, move backward, up to the not output of water dust particle detector.Write down this two positions respectively by the milscale registration, the distance between these two positions is the depth of field of water dust particle detector.
Claims (4)
1. the caliberating device of a forward scattering water dust particle detector is characterized in that: comprise D translation platform, buncher, rotating circular disk, diaphragm anchor clamps and the one group of pore diameter range aperture at 5-50 μ m; Buncher is fixed on the D translation platform and with the D translation platform and moves along the exploring laser light transmit direction of forward scattering water dust particle detector and with the exploring laser light vertical direction; Rotating circular disk is fixedlyed connected with the rotating shaft of buncher by the center of circle and is rotated with machine shaft; Have screw on the rotating circular disk; The diaphragm anchor clamps are made up of the cylinder-shaped body and the silk pressing of hollow, and the main body outer rim is carved with screw thread, and the screw aperture adapts and interconnects fixing by screw thread on main body external profile diameter and the rotating circular disk; Aperture external diameter and diaphragm jig main body internal orifice dimension adapt and are fixed in by silk pressing in the endoporus of diaphragm anchor clamps.
2. the caliberating device of forward scattering water dust particle detector according to claim 1, it is characterized in that: described one group of pore diameter range comprises that at the aperture of 5-50 μ m the aperture is respectively 5 μ m, 10 μ m, 6 apertures of 20 μ m, 30 μ m, 40 μ m, 50 μ m.
3. the caliberating device of forward scattering water dust particle detector according to claim 1, it is characterized in that: comprise that also one is used for buncher is fixed in translation stage-motor jockey on the D translation platform, this translation stage-motor jockey is divided into base and compressing member two parts, base portion is flat, the bottom is opened the hole and is used for fixing on the D translation platform, and top is between two parties according to the size open semicircle groove of motor; The compressing member part is open semicircle shape groove also, is fixed on the base by flange, and compresses buncher.
4. the caliberating device of forward scattering water dust particle detector according to claim 1 is characterized in that: all drive by a milscale on three movable directions of D translation platform, can accurately control and measure the displacement of D translation platform by milscale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202812699U CN201740735U (en) | 2010-08-03 | 2010-08-03 | Calibration device of forward scattering cloud droplet particle detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202812699U CN201740735U (en) | 2010-08-03 | 2010-08-03 | Calibration device of forward scattering cloud droplet particle detector |
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| CN201740735U true CN201740735U (en) | 2011-02-09 |
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| CN2010202812699U Expired - Lifetime CN201740735U (en) | 2010-08-03 | 2010-08-03 | Calibration device of forward scattering cloud droplet particle detector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936870A (en) * | 2010-08-03 | 2011-01-05 | 南京信息工程大学 | Method for calibrating forescattering cloud droplet particle detector and device thereof |
| CN106053303A (en) * | 2016-05-18 | 2016-10-26 | 西南技术物理研究所 | Laser forward scattering cloud droplet spectrum detection system |
| CN109100329A (en) * | 2018-06-11 | 2018-12-28 | 南京信息工程大学 | A kind of scaling method of polarization cloud particle detection system to nonspherical particle |
-
2010
- 2010-08-03 CN CN2010202812699U patent/CN201740735U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936870A (en) * | 2010-08-03 | 2011-01-05 | 南京信息工程大学 | Method for calibrating forescattering cloud droplet particle detector and device thereof |
| CN106053303A (en) * | 2016-05-18 | 2016-10-26 | 西南技术物理研究所 | Laser forward scattering cloud droplet spectrum detection system |
| CN109100329A (en) * | 2018-06-11 | 2018-12-28 | 南京信息工程大学 | A kind of scaling method of polarization cloud particle detection system to nonspherical particle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110209 Effective date of abandoning: 20111214 |