CN106290183A - snow state parameter measuring method based on spectral reflectance - Google Patents
snow state parameter measuring method based on spectral reflectance Download PDFInfo
- Publication number
- CN106290183A CN106290183A CN201610583988.8A CN201610583988A CN106290183A CN 106290183 A CN106290183 A CN 106290183A CN 201610583988 A CN201610583988 A CN 201610583988A CN 106290183 A CN106290183 A CN 106290183A
- Authority
- CN
- China
- Prior art keywords
- snow
- state parameter
- core
- spectral reflectance
- particle diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
- G01N2021/3155—Measuring in two spectral ranges, e.g. UV and visible
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention relates to a kind of snow state parameter measuring method based on spectral reflectance, its technical characteristics is to comprise the following steps: measurement standard snow core state parameter data the regression fit equation of Criterion snow core state parameter；The spectral reflectance of snowberg on in-site measurement electric transmission line isolator, and obtain the water content of snow core to be measured, unit weight and particle diameter according to regression fit equation model.The present invention passes through the fit equation of the state parameters such as spectral reflectance and the water content of snow, unit weight and the particle diameter of Criterion snow core, form data base, and by the spectral reflectance of snow core on measure field transmission line of electricity and insulator, matching obtains water content, unit weight and the particle diameter of snow, achieve the telemeasurement function to the state parameter at the snowberg run on insulator away from ground, can understand rapidly the snowberg state of electric transmission line isolator, working for the anti-snowberg of circuit and flashover thereof provides important references.
Description
Technical field
Invention belongs to transmission line of electricity technical field, a kind of snow state parameter measurement side based on spectral reflectance
Method.
Background technology
Along with the in-depth of China's structural transformation of the economy, the output value of the high-grade, precision and advanced industry of high added value increases year by year, these industries
Require the highest for the quality of power supply and power supply reliability.And China's topography and geomorphology is complicated, microclimate condition is multiple, causes power transmission line
Road covering ice for insulator snow, is greatly reduced dielectric strength, induces insulator arc-over accident, causes power outage and economic damage on a large scale
Lose.For avoiding transmission system to be subject to complicated weather environment, such as the impact of the natural disasters such as ice and snow, need badly relevant issues are carried out and grind
Study carefully, propose corresponding means of prevention.
When research is it is believed that electric transmission line isolator icing type is glaze the most both at home and abroad, flashover voltage is minimum, because of
And probability of flashover is maximum.But under special weather conditions, the flashover that snowberg causes the most often occurs.Transmission line of electricity snowberg dodges
Network accident advances the process of insulator snowberg flashover study mechanism, may cause snowberg bridge joint full skirt, the internal layer of flashover factor
Under the conditions of thawing icing or special climate, snowberg morphologic change etc. are concerned.External relevant scholar has been found that different conditions
Snow, its leakage current evolution, local arc distribution and flashover process are clearly distinguished from.The snow that water content is the lowest, the most dry snow,
Snow bulk resistor is big, and leakage current is little, and the Joule heat of generation is not enough so that snow body melts, and the state of insulator keeps constant, thus
Flashover voltage is high；And the snow that water content is high, i.e. snow slush, snow water mixture therein flows along the full skirt of insulator, significantly drops
Low insulation resistance, makes insulator electric field produce distortion, and then produces local arc, be finally developed to entirely go here and there flashover, thus flashover
Voltage is low, and flashover is dangerous big.Therefore, the measurement of the state parameter of insulator snowberg is on-the-spot anti-snowberg and the base of flashover work thereof
Plinth.
Owing to supertension and extra-high voltage insulator are erected at away from the power transmission tower on ground, terrain clearance more than 20 meters,
It is difficult to the snow of different conditions is effectively distinguished with naked eyes, and in order to reduce the impact on normal power supply, it is impossible to have a power failure to absolutely
Snowberg on edge is sampled directly measuring.In order to make fortune inspection personnel accurately and timely grasp the snowberg of electric transmission line isolator
Situation, in the urgent need to carrying out telemeasurement to the state parameter of snow.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of snow state parameter based on spectral reflectance
Measuring method, solves the problem that electric transmission line isolator snowberg state is carried out telemeasurement.
The present invention solves it and technical problem is that and take techniques below scheme to realize:
A kind of snow state parameter measuring method based on spectral reflectance, comprises the following steps:
Step 1, measurement standard snow core state parameter data the regression fit equation of Criterion snow core state parameter；
The spectral reflectance of snowberg on step 2, in-site measurement electric transmission line isolator, and according to regression fit equation model
Obtain the water content of snow core to be measured, unit weight and particle diameter.
The processing method of described step 1 is:
(1) spectrogrph receives fibre-optical probe holding incident illumination and is 45 degree with reflecting the light angle with normal, fiber-optic probe
Azimuth is 180 degree；
(2) open spectrogrph, adjust and set instrument；
(3) make sample with standard reflection blank, obtain the spectral intensity values of blank 400～1400nm, as benchmark, be designated as
A0；
(4), with standard snow core to be measured as sample, obtain the spectral intensity values of snow core 400～1400nm, be designated as Ai；
(5) obtain the standard reflection of snow core than array, be designated as Ri, then
(6) measure unit weight and the particle diameter obtaining snow core；
Use R the most respectivelyiRegression fit side between water content, unit weight and particle diameter that the data of middle characteristic light spectral coverage are set up and avenged
Journey, this fit equation is as follows:
Wc=A1Ra+B1
Vd=A2Rb+B2
Dp=A3Rc+B3
In formula: Wc、VdAnd DpIt is the water content of standard snow core, unit weight and particle diameter respectively.A1、A2、A3、B1、B2And B3It is normal
Number, is the undetermined coefficient of fit equation respectively, Ra、RbAnd RcIt is the fit equation characteristic of correspondence light of three kinds of state parameters respectively
The standard reflection ratio of spectral coverage.
Described standard snow core state parameter data base includes following three kinds of state parameters: the water content of snow, unit weight and particle diameter.
Described four kinds of standard snow cores are respectively as follows: dry snow, tide snow, snow slush and water snow slush, and described dry snow snow core is natural sampling
Pure snow；Described tide snow is 200g pure snow+20g water, and it has viscosity and avenges for unfashioned shot；Described snow slush is 230g
Pure snow+120g water, it has compared with high viscosity and shaping placed in the vessel；Described water snow slush is 280g pure snow+210g water, and it is
Slush state.
Described step 2 method particularly includes:
(1) spectrogrph is received fibre-optical probe and points to the snowberg on insulator to be measured, measure its spectral intensity values, and
Measuring angle of incidence of sunlight now, spectrogrph receives optical detection angle and azimuth；The wave-length coverage that spectrogrph can detect is wanted
Ask as 400nm～1400nm；
(2) use standard reflection blank, measure the spectral intensity values of 400～1400nm, as benchmark；
(3) obtain treating the spectral reflectance curve of snow survey body 400～1400nm, by the data of certain spectral, substitute into matching side
Journey, and then obtain treating the water content of snow survey body, unit weight and particle diameter state parameter.
Described standard reflection blank is barium sulfate blank.
Advantages of the present invention and good effect be:
The present invention passes through the state parameters such as spectral reflectance and the water content of snow, unit weight and the particle diameter of Criterion snow core
Fit equation, forms data base, and by the spectral reflectance of snow core on measure field transmission line of electricity and insulator, matching obtains
Water content, unit weight and the particle diameter of snow, thus define the measurement procedure of complete set and standard, complete the state parameter to snow
Research, it is achieved that the telemeasurement function to the state parameter at the snowberg run on insulator away from ground, it is possible to
Understanding rapidly the snowberg state of electric transmission line isolator, working for the anti-snowberg of circuit and flashover thereof provides important references.The present invention
As complete set and the measurement procedure of standard, what different regions ice and snow weather in various degree snowed state parameter can be instructed
Measure, on-the-spot fortune inspection personnel can be made accurately and timely to grasp the snowberg situation of electric transmission line isolator.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the measure spectrum reflectivity method of invention；
In figure, sample can be snow body when standard snow core, standard reflection blank or in-site measurement.
Detailed description of the invention
Below in conjunction with accompanying drawing, inventive embodiments is further described:
A kind of snow state parameter measuring method based on spectral reflectance, comprises the following steps:
Step 1, measurement standard snow core state parameter data the regression fit equation of Criterion snow core state parameter.
In this step, need the data base of Criterion snow core state parameter, record four kinds of states snow 400～
The data of the spectral reflectance of 1400nm.The snow of four kinds of states, according to the different proportion preparation of dry snow and water, is respectively dry snow, tide
Snow, snow slush and water snow slush.Dry snow core product are the pure snow of natural sampling, and tide snow is 200g pure snow+20g water, slightly has viscosity, but
It is still unfashioned shot snow.Snow slush is 230g pure snow+120g water, and viscosity is higher, and sample is placed in the vessel can be shaped.Water
Snow slush is 280g pure snow+210g water, and the thawing degree of this sample snow is higher, becomes slush state.Measure four kinds of state parameters respectively
Spectral reflectance, unit weight and the particle diameter of snow, Fig. 1 gives the schematic diagram of spectral reflectance ratio measuring method.
The concrete processing procedure of this step is as follows:
(1) keeping incident illumination and reflection light to be 45 degree with the angle of normal, the azimuth of fiber-optic probe is 180 degree, i.e.
The direction just incident illumination penetrated；
(2) open spectrogrph, adjust and set instrument；
(3) making sample with standard reflection blank (recommending barium sulfate blank), the spectrum obtaining blank 400～1400nm is strong
Angle value, as benchmark, is designated as A0；
(4) with standard snow core to be measured as sample, obtain the spectral intensity values of snow core 400～1400nm, be designated as Ai；
(5) obtain the standard reflection of snow core than array, be designated as Ri, then
(6) measurement obtains unit weight and the particle diameter of snow core；
(7) R is used respectivelyiRegression fit between water content, unit weight and particle diameter that the data of middle characteristic light spectral coverage are set up and avenged
Equation, this fit equation is as follows:
Wc=A1Ra+B1
Vd=A2Rb+B2
Dp=A3Rc+B3
In formula: Wc、VdAnd DpIt is the water content of standard snow core, unit weight and particle diameter respectively.A1、A2、A3、B1、B2And B3It is normal
Number, is the undetermined coefficient of fit equation respectively, Ra、RbAnd RcIt is the fit equation characteristic of correspondence light of three kinds of state parameters respectively
The standard reflection ratio of spectral coverage.The spectral absorption peak position corresponding due to different parameters is different, and therefore this value there are differences.
The spectral reflectance of snowberg on step 2, in-site measurement electric transmission line isolator, and according to regression fit equation model
Obtain the water content of snow core to be measured, unit weight and particle diameter.
The measuring method of this step is similar with step 1, obtains spectral reflectance S of electric transmission line isolator snowi, specifically
Process is as follows:
(1), when measuring at the scene, spectrogrph is received fibre-optical probe and points to the snowberg on insulator to be measured, measure it
Spectral intensity values, and measure angle of incidence of sunlight now, spectrogrph receives optical detection angle and azimuth.Spectrogrph can detect
Wave-length coverage require at least 400nm～1400nm.
(2) use standard reflection blank, measure the spectral intensity values of 400～1400nm, as benchmark.Suggestion arranges optics
Systematic parameter is consistent with when measuring snowberg on insulator, i.e. angle of incidence, angle of reflection is the most identical with azimuth.
(3) obtain treating the spectral reflectance curve of snow survey body 400～1400nm, the data to certain spectral, substitute into step 1
In the fit equation that obtains, and then obtain treating the state parameters such as the water content of snow survey body, unit weight and particle diameter.
Owing to on-site measurement visibility is for the impact of measurement accuracy, therefore, when the present invention measures at the scene, need
Weather is fine and in the case of hazing, and carries out measurement work respectively,
It is emphasized that the embodiment described in invention is illustrative rather than determinate, therefore invention includes also
It is not limited to the embodiment described in detailed description of the invention, every is drawn according to the technical scheme of invention by those skilled in the art
Other embodiments, also belong to the scope of invention protection.
Claims (6)
1. a snow state parameter measuring method based on spectral reflectance, it is characterised in that comprise the following steps:
Step 1, measurement standard snow core state parameter data the regression fit equation of Criterion snow core state parameter；
The spectral reflectance of snowberg on step 2, in-site measurement electric transmission line isolator, and obtain according to regression fit equation model
The water content of snow core to be measured, unit weight and particle diameter.
Snow state parameter measuring method based on spectral reflectance the most according to claim 1, it is characterised in that: described step
The processing method of rapid 1 is:
(1) spectrogrph receives fibre-optical probe holding incident illumination and is 45 degree with reflecting the light angle with normal, the orientation of fiber-optic probe
Angle is 180 degree；
(2) open spectrogrph, adjust and set instrument；
(3) make sample with standard reflection blank, obtain the spectral intensity values of blank 400～1400nm, as benchmark, be designated as A0；
(4), with standard snow core to be measured as sample, obtain the spectral intensity values of snow core 400～1400nm, be designated as Ai；
(5) obtain the standard reflection of snow core than array, be designated as Ri, then
(6) measure unit weight and the particle diameter obtaining snow core；
Use R the most respectivelyiRegression fit equation between water content, unit weight and particle diameter that the data of middle characteristic light spectral coverage are set up and avenged, should
Fit equation is as follows:
Wc=A1Ra+B1
Vd=A2Rb+B2
Dp=A3Rc+B3
In formula: Wc、VdAnd DpIt is the water content of standard snow core, unit weight and particle diameter respectively.A1、A2、A3、B1、B2And B3It is constant, point
It not the undetermined coefficient of fit equation, Ra、RbAnd RcIt is the fit equation characteristic of correspondence spectrum segment of three kinds of state parameters respectively
Standard reflection ratio.
Snow state parameter measuring method based on spectral reflectance the most according to claim 1, it is characterised in that: described mark
Quasi-snow core state parameter data base includes following three kinds of state parameters: the water content of snow, unit weight and particle diameter.
Snow state parameter measuring method based on spectral reflectance the most according to claim 3, it is characterised in that: described four
Planting standard snow core and be respectively as follows: dry snow, tide snow, snow slush and water snow slush, described dry snow snow core is the pure snow of natural sampling；Described tide snow
Being 200g pure snow+20g water, it has viscosity and avenges for unfashioned shot；Described snow slush is 230g pure snow+120g water, its
Have compared with high viscosity and shaping placed in the vessel；Described water snow slush is 280g pure snow+210g water, and it is slush state.
Snow state parameter measuring method based on spectral reflectance the most according to claim 1, it is characterised in that: described step
Rapid 2 method particularly includes:
(1) spectrogrph is received fibre-optical probe and points to the snowberg on insulator to be measured, measure its spectral intensity values, and measure
Angle of incidence of sunlight now, spectrogrph receives optical detection angle and azimuth；The wave-length coverage that spectrogrph can detect requires
400nm～1400nm；
(2) use standard reflection blank, measure the spectral intensity values of 400～1400nm, as benchmark；
(3) obtain treating the spectral reflectance curve of snow survey body 400～1400nm, by the data of certain spectral, substitute into fit equation,
And then obtain treating the water content of snow survey body, unit weight and particle diameter state parameter.
6. according to the snow state parameter measuring method based on spectral reflectance described in claim 2 or 5, it is characterised in that: institute
Stating standard reflection blank is barium sulfate blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610583988.8A CN106290183B (en) | 2016-07-19 | 2016-07-19 | Snow state parameter measurement method based on spectral reflectance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610583988.8A CN106290183B (en) | 2016-07-19 | 2016-07-19 | Snow state parameter measurement method based on spectral reflectance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106290183A true CN106290183A (en) | 2017-01-04 |
| CN106290183B CN106290183B (en) | 2018-12-04 |
Family
ID=57652155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610583988.8A Active CN106290183B (en) | 2016-07-19 | 2016-07-19 | Snow state parameter measurement method based on spectral reflectance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106290183B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014780A (en) * | 2017-05-16 | 2017-08-04 | 北京奥博泰科技有限公司 | Device and method for measuring non-diffuse plate material transmittance and reflectivity |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007443A (en) * | 2014-04-24 | 2014-08-27 | 南京大学 | Method for extracting polar region sea ice melting tank by utilizing spectral feature |
| US8873062B2 (en) * | 2012-08-09 | 2014-10-28 | Jeffrey Scott Adler | Reflective material sensor |
| CN105116464A (en) * | 2015-08-12 | 2015-12-02 | 南京大学 | Polar sea ice melting pool extraction method based on neural network model |
| CN105651761A (en) * | 2015-12-28 | 2016-06-08 | 清华大学深圳研究生院 | Icing salt measurement method and apparatus thereof |
-
2016
- 2016-07-19 CN CN201610583988.8A patent/CN106290183B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8873062B2 (en) * | 2012-08-09 | 2014-10-28 | Jeffrey Scott Adler | Reflective material sensor |
| CN104007443A (en) * | 2014-04-24 | 2014-08-27 | 南京大学 | Method for extracting polar region sea ice melting tank by utilizing spectral feature |
| CN105116464A (en) * | 2015-08-12 | 2015-12-02 | 南京大学 | Polar sea ice melting pool extraction method based on neural network model |
| CN105651761A (en) * | 2015-12-28 | 2016-06-08 | 清华大学深圳研究生院 | Icing salt measurement method and apparatus thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘胜春 等: "输电线路导线覆冰模拟计算与试验研究", 《中国电机工程学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014780A (en) * | 2017-05-16 | 2017-08-04 | 北京奥博泰科技有限公司 | Device and method for measuring non-diffuse plate material transmittance and reflectivity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106290183B (en) | 2018-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hu et al. | Inspection and monitoring technologies of transmission lines with remote sensing | |
| CN102661799B (en) | Fault positioning method and system | |
| CN103293117B (en) | Inversion method of micro-pulse differential absorption lidar water vapor spatial and temporal distribution | |
| CN103630908B (en) | Laser frequency spectrum Measurement and calibration method in molecular scattering anemometry laser radar | |
| CN102361250B (en) | Field operation and maintenance method for operation composite insulator based on performance evaluation | |
| CN101576593B (en) | Array Type Inferior Insulator Local Electric Field Detection Device and Reverse Diagnosis Method | |
| CN203298870U (en) | GIS device contact temperature on-line monitoring system based on infrared temperature sensor | |
| CN102565577A (en) | Method for detecting high optical spectrum of composite insulator | |
| CN103698001B (en) | A kind of transmission line galloping monitoring method analyzing method based on monocular vision | |
| CN102768183B (en) | System and method for online monitoring filth of fiber bragg grating transmission line | |
| CN109540845A (en) | A kind of water quality monitoring method using UAV flight's spectrometer | |
| RU2720638C1 (en) | Device for monitoring and diagnostics of high-voltage linear polymer insulators | |
| CN106290183B (en) | Snow state parameter measurement method based on spectral reflectance | |
| CN207636665U (en) | A kind of Leakage Current harvester | |
| Salemink et al. | Quantitative lidar at 532 nm for vertical extinction profiles and the effect of relative humidity | |
| CN203772225U (en) | Apparatus for measuring icing thickness of overhead transmission line | |
| CN107247059B (en) | Insulator fault detection device and method based on air thermal schlieren distribution | |
| CN103278512B (en) | Device and method for online detection on structural damage of solar panel by utilizing microwaves | |
| CN105403815A (en) | Insulator live detection system and method based on wireless ad hoc network communication | |
| Li et al. | UV detection technology of insulator discharge based on UAV platform | |
| CN115184382A (en) | Ice measuring method and device based on microwaves | |
| CN205138673U (en) | Temperature on -line monitoring system based on wireless radio frequency technology | |
| CN204514278U (en) | Electric power line ice-covering thickness measuring instrument | |
| Meng et al. | Research on integrated system for solar simulator performance calibration according to IEC 60904-9 | |
| Hossion et al. | Analysis of various degradations of five years aged mono C-Si, Poly c-Si, and thin-film photovoltaic modules from rooftop solar installations in Dhaka’s tropical wet and dry climate conditions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |