CN106767572A - A kind of method for observing spilled oil on water surface oil film roughness - Google Patents
A kind of method for observing spilled oil on water surface oil film roughness Download PDFInfo
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- CN106767572A CN106767572A CN201710018058.2A CN201710018058A CN106767572A CN 106767572 A CN106767572 A CN 106767572A CN 201710018058 A CN201710018058 A CN 201710018058A CN 106767572 A CN106767572 A CN 106767572A
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- Prior art keywords
- oil film
- oil
- film roughness
- water surface
- spilled
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention belongs to spilled oil on water surface field, specifically a kind of method for observing spilled oil on water surface oil film roughness.Using high-resolution three-dimensional laser scanner, it is fixed on pasta to be measured, and keeps being scanned under perpendicular condition in pasta and scanner scanning incidence angle, and then obtain ranging data, then recycles root-mean-square error to calculate and obtain oil film roughness.The measuring method of oil film roughness of the invention can be supported setting up the relation between oil film roughness and back scattering there is provided measured data；Improved for offshore spilled oil remote sensing monitoring precision, there is provided strong technical support.It develops a New function of three-dimensional laser scanner simultaneously, and original three-dimensional laser scanner is mainly used in the range finding and scanning of solid, and the ranging scan for liquid is little, especially the scanning of crude oil oil film roughness, beyond example.The invention realizes the breakthrough that instrument scans oil film roughness, and the influence for research spilled oil on water surface oil film to back scattering provides data and supports.
Description
Technical field
The invention belongs to spilled oil on water surface field, specifically a kind of method for observing spilled oil on water surface oil film roughness.
Background technology
Sea surface roughness is the physical quantity for characterizing sea aerodynamics degree of roughness, and it has described sea minute yardstick and has risen and fallen
Degree, its Changing Pattern reflects the principal character of Momentum Transport process between ocean and air to a certain extent.Sea
Roughness is typically with aerodynamics roughness length Z0To represent, it be defined as the null height of wind speed (Stull R B,
Zhao new boundary layer meteorologies introduction [J] Qingdao long:Qingdao Marine University, 1991:1-21.).
The physical quantity that physical oceanography aspect characterizes sea surface roughness has three：Coarse Reynolds number Rr=Z0U*/γ, air force
Learn roughness length Z0(Geernaert G L,Katsaros K B,Richter K.Variation of the drag
coefficient and its dependence on sea state[J].Journal of Geophysical
Research:Oceans,1986,91(C6):7667-7679.) with resistance coefficient Cz=(u*/Uz)2.Wherein, CzAnd UzRespectively
Resistance coefficient and wind speed (Donelan M A, Dobson F W, Smith S D, the et al.On the of Z eminences in face off sea
dependence of sea surface roughness on wave development[J].Journal of
Physical Oceanography,1993,23(9):2143-2149.), γ ≈ 1.62x10-5m2/ s is viscous for air movement
Stagnant coefficient.It is believed that Rr<0.13 sea is smooth, 0.13≤Rr≤ 2 seas are the transition region of viscosity and Rough Sea Surfaces, Rr>2
Sea is Rough Sea Surfaces.
Sea surface roughness be all by the approximate calculation of coarse Reynolds number, aerodynamics roughness length or resistance coefficient come
Characterize.On oil spilling sea surface roughness have by Monte-Carlo Simulation simulate obtain (Li Yang, based on experiment offshore spilled oil it is micro-
Scattering of wave characteristic research.Master's thesis, 2014, University of Electronic Science and Technology).It is coarse there is presently no offshore spilled oil is measured by instrument
Degree, our Success in Experiment obtain oil film roughness in the water surface for the first time, and this is for research offshore spilled oil is theoretical and microwave remote sensing is accurate
Observation offshore spilled oil is supported there is provided data.
The content of the invention
Present invention aim at a kind of method for observing spilled oil on water surface oil film roughness of offer.
To achieve the above object, the present invention use technical scheme for：
A kind of method for observing spilled oil on water surface oil film roughness, using high-resolution three-dimensional laser scanner, consolidate
Due on pasta to be measured, and keep being scanned under perpendicular condition in pasta and scanner scanning incidence angle, and then found range
Data, then recycle root-mean-square error formula to calculate and obtain oil film roughness.
Pasta is vertical with the holding of scanner scanning incidence angle in the scanning process；And, it is impossible to produce any vibrations.
The three-dimensional laser scanner resolution ratio used in the scanning process is grade, according to the scanner for being used certainly
Body is set, and according to this ratio, calculates and obtains the corresponding scanner of practical measurement with fuel head calculating hot spot row, column spacing；With
And corresponding spot size and sweep speed.
The root-mean-square error formula isWherein x is measured data,It is measured data average, n actual measurement numbers
According to number.
A kind of application of three-dimensional laser scanner, the three-dimensional laser scanner is in spilled oil on water surface oil film roughness is observed
Application.Wherein, three-dimensional laser scanner is high-resolution three-dimensional laser scanner, for example, come card laser scanner.
Using the three-dimensional laser scanner of high resolution, it is fixed on pasta to be measured, and is swept with scanner in pasta
Retouch incidence angle to keep being scanned under perpendicular condition, observe spilled oil on water surface oil film roughness and obtain ranging data, it is then sharp again
Calculated with root-mean-square error and obtain oil film roughness.
Advantage for present invention：
The inventive method realizes the observation to oil film roughness, using the method under oil spilling state, oil film roughness
Influence to back scattering provides precision and data are supported.
Use the inventive method can be with direct measurement liquid roughness, especially water-surface oil film roughness, it is to oil spilling water
Face difference emulsification degree oil film roughness is strong support, and then is different emulsification degree oil film roughness to back scattering
Influence there is provided data support, for ocean remote sensing spilled oil monitoring precision provides technical support.
Brief description of the drawings
Fig. 1 is the ranging data that vertical scanning provided in an embodiment of the present invention is obtained, and remaining region is being not reaching to vertically
Scanning mode, ranging data error is big, and remaining black region does not have ranging data.
Fig. 2 is the changing trend diagram that crude oil provided in an embodiment of the present invention enters water emulsification roughness and moisture content.
Specific embodiment
The present invention is further elaborated in the following examples, but the invention is not restricted to this.
Embodiment
As a example by observing spilled oil on water surface emulsification：
Card laser scanner is come using the three-dimensional high of rate respectively, it is compact, pulsed, possess measurement millimeter precision, tool
There are high speed, Wide-angle, incorporate video digital camera and laser centring device.Airborne panel control, notebook or desktop computer point
Control；Integrated solid state hard disc, external point bird or external USB equipment.25000 points of sweep speed/second~50000 point/second.It is integrated
High-resolution video digital camera, can automatically adjust exposure.Power supply：15V direct currents are input into or 90-260V exchange inputs, power
〈50W.Battery types：Interior battery, lithium battery, outer battery, lithium battery.Environmental index：0 DEG C~40 DEG C of operating temperature, storage temperature
- 25 DEG C~+65 DEG C of degree, evening on daytime can work, humidity frozen-free；Dust-proof/classification of waterproof IP54 (IEC 60529).
Meanwhile, spacing and hot spot row, column spacing according to scanner setting themselves are 100 meters, hot spot row, column that is, with fuel head
0.05 meter of spacing；According to this ratio, calculate and obtain between the corresponding scanner of practical measurement and fuel head calculating hot spot row, column
Away from；And corresponding spot size and sweep speed.
By above-mentioned laser scanner by the very firm fixation of supplementary means (e.g., fixed mount, crane long-armed etc.) with treat
Survey ullage, it is impossible to have any vibration；Pasta to be measured must be vertical with machine scans incidence angle, i.e. 90 ° of visual angle vertical scanning,
Machine can be according to a height of 1.3 meters, 0.65 millimeter of hot spot row, column spacing, spot size with fuel head during scanning:4.5mm/0-
50m, (benchmark high of overall with half) 7mm (being based on Gauss surface) sweep speeds are 25000 points/second.Machine scans resolution ratio is millimeter essence
Degree；Oil film roughness is calculated using root-mean-square error formula according to ranging data is obtained,
Wherein x is measured data,It is measured data average, n measured data numbers.By above-mentioned observed pattern, obtain
Oil film ranging data, according to respective formula and then calculates water-surface oil film roughness；Based on crude enters water and emulsifies, and oil film is thick
Rugosity can be changed, and emulsification of crude oil degree is known by the moisture content for testing oil film, so that it is coarse to observe oil spilling emulsification oil film
The change (see Fig. 2) of degree.
The visible oil film roughness of change as described in above-mentioned Fig. 2 is raised and reduced with emulsification degree.Oil film of the invention
The measuring method of roughness can provide measured data support to set up the relation between oil film roughness and back scattering；For
Offshore spilled oil remote sensing monitoring precision is improved, there is provided strong technical support.It develops three-dimensional laser scanner simultaneously
One New function, original three-dimensional laser scanner is mainly used in the range finding and scanning of solid, for liquid ranging scan very
It is few, especially crude oil oil film roughness scanning, beyond example.The invention realizes the breakthrough that instrument scans oil film roughness, is
The influence of research spilled oil on water surface oil film and oil film emulsification degree to back scattering is supported there is provided data.
Claims (5)
1. it is a kind of observe spilled oil on water surface oil film roughness method, it is characterised in that：Using high-resolution 3 D laser scanning
Instrument, is fixed on pasta to be measured, and keeps being scanned under perpendicular condition in pasta and scanner scanning incidence angle, and then
Ranging data is obtained, is then recycled root-mean-square error formula to calculate and is obtained oil film roughness.
2. as described in claim 1 observation spilled oil on water surface oil film roughness method, it is characterised in that：In the scanning process
Pasta is vertical with the holding of scanner scanning incidence angle；And any vibrations can not be produced.
3. as described in claim 1 observation spilled oil on water surface oil film roughness method, it is characterised in that：The root-mean-square error
Formula isWherein x is measured data,It is measured data average, n measured data numbers.
4. a kind of application of three-dimensional laser scanner, it is characterised in that：The three-dimensional laser scanner is in observation spilled oil on water surface oil
Application in film roughness.
5. as described in claim 4 three-dimensional laser scanner application, it is characterised in that：Swept using the three-dimensional laser high of rate respectively
Instrument is retouched, is fixed on pasta to be measured, and keep being scanned under perpendicular condition in pasta and scanner scanning incidence angle, seen
Survey spilled oil on water surface oil film roughness and obtain ranging data, then recycle root-mean-square error to calculate and obtain oil film roughness.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710018058.2A CN106767572A (en) | 2017-01-10 | 2017-01-10 | A kind of method for observing spilled oil on water surface oil film roughness |
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| CN201710018058.2A CN106767572A (en) | 2017-01-10 | 2017-01-10 | A kind of method for observing spilled oil on water surface oil film roughness |
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| CN106767572A true CN106767572A (en) | 2017-05-31 |
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| CN201710018058.2A Pending CN106767572A (en) | 2017-01-10 | 2017-01-10 | A kind of method for observing spilled oil on water surface oil film roughness |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540915A (en) * | 2018-11-19 | 2019-03-29 | 温州大学 | A kind of cleaning machine cleaning detection method based on laser ranging |
| CN110285751A (en) * | 2019-05-28 | 2019-09-27 | 中国北方车辆研究所 | Automate ring shaped multi-tooth component bottom of the tooth axial surface roughness measuring instrument |
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| JP2006105748A (en) * | 2004-10-05 | 2006-04-20 | National Institute Of Advanced Industrial & Technology | Analyzing method accompanied by incidence of beam |
| JP2008241383A (en) * | 2007-03-27 | 2008-10-09 | Yaskawa Electric Corp | Oil film dielectric breakdown evaluation device |
| CN102706295A (en) * | 2012-06-29 | 2012-10-03 | 中国科学院遥感应用研究所 | Surface roughness measurement system and surface roughness measurement method |
| CN104062653A (en) * | 2014-07-17 | 2014-09-24 | 中国科学院遥感与数字地球研究所 | Radar remote sensing multi-scale surface roughness measuring method based on three-dimensional microtopography reconstruction |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540915A (en) * | 2018-11-19 | 2019-03-29 | 温州大学 | A kind of cleaning machine cleaning detection method based on laser ranging |
| CN109540915B (en) * | 2018-11-19 | 2021-03-23 | 温州大学 | Cleaning machine cleaning detection method based on laser ranging |
| CN110285751A (en) * | 2019-05-28 | 2019-09-27 | 中国北方车辆研究所 | Automate ring shaped multi-tooth component bottom of the tooth axial surface roughness measuring instrument |
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Application publication date: 20170531 |