CN104391343B - Laser raindrop spectrograph measurement error correction method - Google Patents
Laser raindrop spectrograph measurement error correction method Download PDFInfo
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- CN104391343B CN104391343B CN201410660435.9A CN201410660435A CN104391343B CN 104391343 B CN104391343 B CN 104391343B CN 201410660435 A CN201410660435 A CN 201410660435A CN 104391343 B CN104391343 B CN 104391343B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01W—METEOROLOGY
- G01W1/00—Meteorology
- G01W1/18—Testing or calibrating meteorological apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
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Abstract
The invention discloses a kind of laser raindrop spectrograph measurement error correction method.This method overcomes the measurement error that the photoelectric technology that current laser raindrop spectrograph used is brought, laser raindrop spectrograph quantitative measurement of rainfall precision can be significantly improved, it is obviously improved radar reflectivity factor and calculates accuracy, and then expands laser raindrop spectrograph quantitative Application field.This method can be used for the optics rainfall gauge of other principles of similitude.
Description
Technical field
The invention belongs to atmospheric science, hydrology field, and in particular to laser raindrop spectrograph and phase for measuring precipitation
Corrected with the udometric measurement error of the optics of measuring principle.
Background technology
The precipitation such as rain, snow, hail in the measurable whereabouts of laser raindrop spectrograph, so as to the rain of various rain types can be calculated
By force, rainfall and radar reflectivity factor etc..Recently as Germany, U.S. etc. country laser raindrop spectrograph introduction, with
The appearance of domestic laser raindrop spectrograph, various laser raindrop spectrographs be widely used in China's traffic control, weather monitoring and service,
The application fields such as scientific research, airport observation, road weather monitoring, hydrography, weather radar data for communication correction.
The qualitative application of laser raindrop spectrograph has gained universal acceptance, but its quantitative Application still suffers from some and needs what is solved
Problem.Either production firm, or research staff is primarily upon the quantitative Application mistake that the big particle of aspherical precipitation is produced so far
Difference problem, enough attention are not caused to being present in light rain, moderate rain, heavy rain, a large amount of small particles even in extra-heavy precipitation.Have
Close research and show raindrop raindrop quality corresponding with the raindrop of 1.2mm respectively 524mg, 905mg of 1.0mm, be i.e. now 0.2mm
Difference 72.7% water can be brought poor；Precipitation particles are smaller, and the error that the difference band of 0.2mm comes is bigger.It is widely used at present
Laser raindrop spectrograph can't obtain the signal corresponding to 0.2mm due to the constraint of technology from noise, and its most I surveys particle diameter
It is mostly 0.2mm.
To improve the precision of laser raindrop spectrograph quantitative Application, shown by our many experiments, it is necessary to laser rain
Droplet collector is surveyed the measurement error brought of particle diameter and is corrected due to most I, thus reduce the precipitation intensity of calculating, precipitation with
And the error of radar reflectivity factor, make laser raindrop spectrograph that quantitative Application is better achieved.
The content of the invention
For above-mentioned because most I surveys the measurement error problem that particle diameter brings, the present invention proposes a kind of laser raindrop spectrograph
Measurement error correction method.This method substitutes the grain that laser raindrop spectrograph is measured with the diameter of correcting close to true precipitation particles
The particle packeting average particle diameter of sub- equivalent grain size or laser raindrop spectrograph, is remarkably improved the standard that laser raindrop spectrograph is quantitatively calculated
True property.
It is an object of the invention to propose a kind of laser raindrop spectrograph measurement error correction method, for improving quantitative calculating
Accuracy.Its method is mainly included the following steps that：
1. obtain laser raindrop spectrograph most I and survey particle diameter Dm.
2. measurement error is corrected.
Scheme one (directly corrects method)：
--- obtain the particle equivalent grain size Di (referred to as measurement particle diameter) of laser raindrop spectrograph measurement.
--- particle is calculated according to (1), (2) formula and corrects particle diameter Dt (referred to as correcting particle diameter)：
Dt=2Rt (1)
Rt2=Ri2+Rm2 (2)
Wherein, to correct radius, Ri=Di/2 is measurement radius to Rt, and Rm=Dm/2 is that most I surveys radius.
--- each precipitation particles is directly calculated in droplet collector sampling process corrects diameter Dt, and substitutes Di meters with Dt
Calculate precipitation intensity and associated arguments.
Scheme two (corrects method) indirectly：
--- obtain the particle packeting average particle diameter Dj (referred to as packet particle diameter) of laser raindrop spectrograph.
--- particle is calculated according to (1), (3) formula and corrects particle diameter Dt：
Rt2=Rj2+Rm2 (3)
Wherein, Rj=Dj/2 is packet radius.
--- the particle diameter Dt that corrects being grouped with each being calculated substitutes former packeting average particle diameter Dj, and calculates drop with Dt
Water intensity and associated arguments.
3. end is corrected.
Advantages of the present invention：
The present invention by measuring laser raindrop spectrograph directly correcting (scheme one) and correct (scheme two) indirectly for particle diameter,
Measurement and the computational accuracy of laser raindrop spectrograph can be significantly improved, for its quantitative Application provides more solid Science and Technology base
Plinth.The advantage of scheme one be can obtain it is accurate correct value, the advantage of scheme two is need not to change bottom software.
Brief description of the drawings
Fig. 1 is the flow chart of the solution of the present invention one, and Fig. 2 is the flow chart of the solution of the present invention two.
Specific embodiment
Embodiments of the present invention are described in detail with reference to Figure of description.
As shown in figure 1, laser raindrop spectrograph measurement error correction method scheme one of the invention is comprised the following steps：
1.1 obtain laser raindrop spectrograph most I surveys particle diameter Dm.
1.2 obtain laser raindrop spectrograph measurement particle diameter Di.
1.3 calculate each particle and correct particle diameter Dt according to (1), (2) formula：
1.4 substitute Di with Dt calculates precipitation intensity and associated arguments.
1.5 correct end.
As shown in Fig. 2 laser raindrop spectrograph measurement error correction method scheme two of the invention is comprised the following steps：
2.1 obtain laser raindrop spectrograph most I surveys particle diameter Dm.
The 2.2 particle packet particle diameter Dj for obtaining laser raindrop spectrograph.
2.3 calculate particle according to (1), (3) formula corrects particle diameter Dt：
2.4 substitute Dj with Dt calculates precipitation intensity and associated arguments.
2.5 correct end.
It is finally noted that, the purpose for publicizing and implementing mode is that help further understands the present invention, but ability
The technical staff in domain is appreciated that：Without departing from the spirit and scope of the invention and the appended claims, it is various replacement and
Modification is all possible.Therefore, the present invention should not be limited to embodiment disclosure of that, the scope of protection of present invention with
The scope that claims are defined is defined.
Claims (3)
1. a kind of laser raindrop spectrograph measurement error correction method, is that the most I based on laser raindrop spectrograph surveys particle diameter Dm, right
The method that measured particle or particle packeting average particle diameter is corrected；This method improves due to laser raindrop spectrograph measurement
Survey the measurement that brings of particle diameter and correlation computations error less than most I, improve laser raindrop spectrograph to the certainty of measurement of precipitation and
Raininess, the accuracy of radar reflectivity factor for being calculated；It is characterised in that it includes following steps：
1) obtain laser raindrop spectrograph most I and survey particle diameter Dm；
2) measurement error is corrected：
Scheme one：Method directly is corrected,
--- particle the equivalent grain size Di, Di for obtaining laser raindrop spectrograph measurement are referred to as measurement particle diameter；
--- particle is calculated according to (1), (2) formula and corrects particle diameter Dt, Dt is referred to as correcting particle diameter,
Dt=2Rt (1)
Rt2=Ri2+Rm2 (2)
Wherein, to correct radius, Ri=Di/2 is measurement radius to Rt, and Rm=Dm/2 is that most I surveys radius；
--- each precipitation particles is directly calculated in droplet collector sampling process corrects particle diameter Dt, and substitutes Di calculating drops with Dt
Water intensity and associated arguments；
Scheme two：Method is corrected indirectly,
--- particle packeting average the particle diameter Dj, Dj for obtaining laser raindrop spectrograph are referred to as packet particle diameter；
--- particle is calculated according to (1), (3) formula and corrects particle diameter Dt,
Rt2=Rj2+Rm2 (3)
Wherein, Rj=Dj/2 is packet radius；
--- the particle diameter Dt that corrects being grouped with each being calculated substitutes former packeting average particle diameter Dj, and it is strong to calculate precipitation with Dt
Degree and associated arguments；
3) end is corrected.
2. laser raindrop spectrograph measurement error correction method as claimed in claim 1, it is characterised in that described laser raindrop
Spectrometer includes the optics rainfall gauge of visible ray, the laser raindrop spectrograph of infrared band and identical measuring principle.
3. laser raindrop spectrograph measurement error correction method as claimed in claim 1, it is characterised in that described laser raindrop
Spectrometer includes the laser raindrop spectrograph and the optics rainfall gauge of identical measuring principle of single beam and multi-beam.
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| CN104391343B true CN104391343B (en) | 2017-06-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105759325B (en) * | 2016-03-04 | 2018-03-16 | 凯盾洛阳智能科技有限公司 | A kind of laser grain spectrometer demarcates knot screen |
| CN109374484B (en) * | 2018-10-16 | 2021-06-04 | 中国气象局上海台风研究所 | Data quality control method of surface laser raindrop spectrometer under strong wind condition |
| CN109143418B (en) * | 2018-11-12 | 2024-05-03 | 华云敏视达雷达(北京)有限公司 | Calibration device of laser raindrop spectrometer |
| CN113075754B (en) * | 2021-04-01 | 2022-10-04 | 南京红露麟激光雷达科技有限公司 | Raindrop spectrum acquisition method and device based on coherent Doppler laser radar |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH08101113A (en) * | 1994-09-30 | 1996-04-16 | Shimadzu Corp | Measuring device for distribution of raindrops |
| JP2003149351A (en) * | 2001-11-12 | 2003-05-21 | Univ Nihon | Simple rainfall measuring device |
| CN101814139B (en) * | 2010-04-14 | 2012-02-29 | 华中科技大学 | A Raindrop Recognition Method |
| ITGE20110068A1 (en) * | 2011-06-30 | 2012-12-31 | Univ Degli Studi Genova | DEVICE FOR VERIFICATION OF CALIBRATION OF INSTRUMENTS CAPTORS FOR MEASUREMENT OF INTENSITY? RAIN |
| CN102426400B (en) * | 2011-11-03 | 2013-10-09 | 中国科学院合肥物质科学研究院 | A Retrieval and Correction Method of Precipitation Information by Laser Raindrop Spectrometer |
| CN102879835B (en) * | 2012-07-19 | 2015-08-12 | 中国科学院合肥物质科学研究院 | A kind of measuring method of laser precipitation weather phenomenon and laser precipitation weather phenomenon instrument |
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