CN109709076A - A kind of forward scattering visibility meter detection system and method - Google Patents
A kind of forward scattering visibility meter detection system and method Download PDFInfo
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Abstract
The invention discloses a kind of forward scattering visibility meter detection system and methods.The detection system includes: meteorological optical range observing environment simulator, standard forward scattering visibility meter, Lambertian source scatter plate, is mechanically fixed adapter, optical filter and host computer；Low-visibility conditions are simulated by meteorological optical range observing environment simulator；And the Lambertian source scatter plate and the optical filter are arranged at described be mechanically fixed on adapter；By the transmitting terminal for being mechanically fixed connector and being detachably arranged in the standard forward scattering visibility meter, normal data is acquired, by the transmitting terminal for being mechanically fixed connector and being detachably arranged in the forward scattering visibility meter to be measured, acquisition testing data；And the normal data and the detection data, the testing result of the acquisition forward scattering visibility meter to be measured dissipate the direct detection of the error of indication of the instrument in low visibility section before realization is currently in use.
Description
Technical field
The present invention relates to field of meteorological detection, in particular to a kind of forward scattering visibility meter detection system and method.
Background technique
Visibility is to reflect an index of atmospheric transparency, refers to the people with twenty-twenty vision in weather at that time in meteorology
Under the conditions of can see and recognize the maximum horizontal range of object from sky background, can be objectively measured and with meteorology
Optics visual range (Meteorological Optical Range, abbreviation MOR) indicates.World Meteorological Organization (world
Meteorological organization, WMO) meteorological optical range that defines refers to that colour temperature is the flat of the incandescent lamp of 2700K
Row beam luminous flux weakens the air path length being required through when 0.05 for its initial value.
The sixth version " meteorologic instrument and observation method guide " of WMO publication is in " apparatus measures of meteorological optical range " middle finger
Common MOR measuring instrument mainly has following two categories out.
1, scattering coefficient of the measurement small size air to light.In natural fog, absorbing usually be can be ignored, and scattering coefficient can
It is regarded as identical as extinction coefficient.Now widely used is forward scattering visibility meter (scattered instrument before hereinafter referred to as).Preceding scattered instrument master
It to be made of transmitting unit, receiving unit, control unit etc..Transmitting unit light source passes through one group of lens on light beam through ovennodulation
Shaping is emitted in air.Particle in light beam and air generates scattering process, and scattering light direction is different.Receiving unit
It forms an angle with transmitting unit shape, receives the scattering light of fixed-direction, the photodetector of receiving unit converts optical signal
For electric signal, electric signal is finally inversed by current weather optics visual range by control unit processing.
2, delustring system or the transmitance of horizontal blank air column are measured.The decaying of light be by beam path Particle Scattering and
Caused by absorption.Because it is the principle for leading to light intensity attenuation according to the scattering and absorption of collimated light beam that transmissometer, which measures MOR, observation
Value and the definition of MOR are closely related.When one transmissometer that is excellent, safeguarding works in its highest accuracy range pair
The true value of MOR can provide extraordinary approximation.From the point of view of the report result that WMO for the first time mutually compares visibility measurement, use
Scatterometer measures low MOR value and is far from being measured accurately with transmissometer.The appropriate transmissometer calibrated and safeguard, when MOR is up to 60 times
The measured value that can provide MOR when its baseline only has about 10% standard error.
Since 2012, China Meteorological department dissipates instrument for comprehensive before more than 2300 national surface weather observation stations are equipped
Close the visibility automatic observation in meteorological observation business.In addition, relevant departments also build along highway and shipping river
Carry out visibility automatic observation equipped with traffic weather observation station and using preceding scattered instrument, for ensuring traffic safety.With Anhui Province
For, by the end of the year 2018, there will be more than 600 traffic weather observation stations to carry out visibility observation.Preresearch estimates, currently, in complete
Meteorological department, state is with preceding nearly 4000 of scattered instrument.
By in October, 2018, the preceding scattered instrument product that China Meteorological Administration's meteorology special technology equipment uses licensing is obtained
There are three types of models, respectively Huayun Shengda (Beijing) Meteorological Science and Technology Co., Ltd. DNQ1 type, Anhui blue shield photoelectron stock altogether
Part Co., Ltd's DNQ2 type and Cama's DNQ3 type.Present invention is mainly used for detect above-mentioned model with
Whether visibility sensor observation indicating value is accurate, also refers to use for dissipating instrument before other models.
" the DNQ1 forward scattering visibility meter use of Huayun Shengda's publication in 2014
Family handbook " it points out that PWA11 calibration external member inspection can be used in calibration method and adjusts equipment Alignment parameter.The external member includes
One baffle and two jealous glass plates with known scatter properties.Calibration process checks two o'clock: zero scattered signal and pole
High scattered signal.Zero-signal is obtained using baffle, and high scattered signal is obtained using jealous glass plate.The DNQ2 type of China
School is carried out using similar method with instrument scattered before PWD20 type with the FD12 type that DNQ3 type and Vaisala company, Finland produce
It is quasi-.Scattered instrument detection device, which cannot be used to detect straight, before existing largely misses in the indicating value with preceding scattered instrument in low visibility section
Difference.
Summary of the invention
The object of the present invention is to provide a kind of forward scattering visibility meter detection system and method, to realize with preceding scattered instrument
In the direct detection of the error of indication in low visibility section.
To achieve the above object, the present invention provides following schemes:
A kind of forward scattering visibility meter detection system, the detection system include:
Meteorological optical range observing environment simulator, standard forward scattering visibility meter, Lambertian source scatter plate, machinery
Fixed transfer part, optical filter and host computer；
The inside of the meteorological optical range observing environment simulator is arranged in the standard forward scattering visibility meter,
The meteorological optical range observing environment simulator is for simulating low-visibility conditions；
The Lambertian source scatter plate and the optical filter are arranged at described be mechanically fixed on adapter；
The transmitting terminal for being mechanically fixed connector and being detachably arranged in the standard forward scattering visibility meter, it is described
The control terminal of standard forward scattering visibility meter is connected to the host computer by Serial Port Line, for acquiring normal data；
The transmitting terminal for being mechanically fixed connector and being detachably arranged in the forward scattering visibility meter to be measured, it is described
The control terminal of forward scattering visibility meter to be measured is connected to the host computer by Serial Port Line, is used for acquisition testing data；
The host computer is used for the normal data and the detection data, and obtaining the forward scattering to be measured can see
Spend the testing result of instrument.
The adapter that is mechanically fixed specifically includes: circular flange disk and the inner diameter size for being provided centrally with circular hole are adjustable
One end of fixture, the circular flange disk is threadedly coupled with the optical filter, and the Lambertian source scatter plate is fixed by jackscrew
In the circular hole of the other end of the circular flange disk, the other end of the circular flange disk passes through screw and the one of the fixture
End is fixed, and the other end of the fixture steps up the transmitting terminal in the standard forward scattering visibility meter.
Optionally, the detection system further include: transmission visibility meter, the emitter setting of the transmission visibility meter
Reception device in one end of the meteorological optical range observing environment simulator, the transmission visibility meter is arranged described
The other end of meteorological optical range observing environment simulator, the transmission visibility meter are used to see for the meteorological optical range
It surveys the visibility simulated environment that environment simulator generates and standard value is provided.
Optionally, the optical filter includes: the first optical filter and the second optical filter；First optical filter and described second
Optical filter is arranged side by side.
Optionally, the transmitance of first optical filter is 1%.
Optionally, the transmitance of second optical filter is 0.1%.
Optionally, the Lambertian source scatter plate is rectangular or round；
Optionally, the range of the haze value of the Lambertian source scatter plate is 95% to 97%.
Optionally, the host computer is computer.
A kind of forward scattering visibility meter detection method, the detection method include the following steps:
Standard forward scattering visibility meter, forward scattering visibility meter to be measured and transmission visibility meter are mounted on meteorological light
It learns in visual range observing environment simulator；
Start the meteorological optical range observing environment simulator and enables to see that angle value is less than 10m；
The parameter for adjusting the standard forward scattering visibility meter makes the measured value of the standard forward scattering visibility meter
It is less than preset value with the difference of the measured value of the transmission visibility meter；
Lambertian source scatter plate and optical filter, which are mounted on the standard forward scattering by being mechanically fixed adapter, to be seen
The transmitting terminal for spending instrument, collects normal data；
Lambertian source scatter plate and optical filter, which are mounted on the forward scattering to be measured by being mechanically fixed adapter, to be seen
The transmitting terminal for spending instrument, collects detection data；
Compare the normal data and the detection data, obtains the detection knot of the forward scattering visibility meter to be measured
Fruit.
The specific embodiment provided according to the present invention, the invention discloses following technical effects:
The invention discloses a kind of forward scattering visibility meter detection system and methods.The detection system includes: meteorology
Optics visual range observing environment simulator, standard forward scattering visibility meter, Lambertian source scatter plate, be mechanically fixed adapter,
Optical filter and host computer；Low-visibility conditions are simulated by meteorological optical range observing environment simulator；And lambert's light
Source scatter plate and the optical filter are arranged at described be mechanically fixed on adapter；To be mechanically fixed connector removable by described respectively
That unloads is mounted on the transmitting terminal of the standard forward scattering visibility meter, acquires normal data, is mechanically fixed connector for described
It is detachably arranged in the transmitting terminal of the forward scattering visibility meter to be measured, acquisition testing data；And the criterion numeral
According to the detection data, obtain the testing result of the forward scattering visibility meter to be measured, realize it is currently in use before scattered instrument
In the direct detection of the error of indication in low visibility section.And it can be by Lambertian source scatter plate using connector is mechanically fixed
The transmitting terminal of the forward scattering visibility meter of different model is set with optical filter, improves forward scattering visibility meter detection system
The versatility of system.
The present invention is also provided with transmission visibility meter, generates for the meteorological optical range observing environment simulator
Visibility simulated environment provides standard value, and instrument is dissipated before realizing and transmits the scene inspection of relative error range between visibility meter
It surveys.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of forward scattering visibility detection system provided by the invention；
Fig. 2 is the scheme of installation of Lambertian source scatter plate provided by the invention；
Fig. 3 is the structural schematic diagram of forward scattering visibility meter provided by the invention；
Fig. 4 is the structural schematic diagram of transmission visibility meter provided by the invention；
Fig. 5 is the optical scattering schematic diagram of Lambertian source scatter plate provided by the invention；
Fig. 6 is a kind of flow chart of forward scattering visibility meter detection method provided by the invention.
Specific embodiment
The object of the present invention is to provide a kind of forward scattering visibility meter detection system and method, to realize with preceding scattered instrument
In the direct detection of the error of indication in low visibility section.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Mode is applied to be described in further detail invention.
Embodiment 1
The embodiment of the present invention 1 provides a kind of forward scattering visibility detection system.
As illustrated in fig. 1 and 2, the detection system include: before meteorological optical range observing environment simulator 1, standard to
Scattering visibility meter 2, Lambertian source scatter plate 3 are mechanically fixed adapter 4, optical filter 5 and host computer 6；To scattered before the standard
Penetrate the inside that the meteorological optical range observing environment simulator 1 is arranged in visibility meter 2, the meteorological optical range observation
Environment simulator 1 is for simulating low-visibility conditions；The Lambertian source scatter plate 3 and the optical filter 5 are arranged at institute
It states and is mechanically fixed on adapter 4；The connector that is mechanically fixed is detachably arranged in the standard forward scattering visibility meter 2
Transmitting terminal, the control terminal of the standard forward scattering visibility meter 2 is connected to the host computer 6 by Serial Port Line, for adopting
Collect normal data；The transmitting terminal for being mechanically fixed connector and being detachably arranged in the forward scattering visibility meter to be measured,
The control terminal of the forward scattering visibility meter to be measured is connected to the host computer 6 by Serial Port Line, is used for acquisition testing data；
The host computer 6 is used for the normal data and the detection data, obtains the forward scattering visibility meter to be measured
Testing result.
Embodiment 2
The embodiment of the present invention 2 provides a kind of preferred embodiment of forward scattering visibility detection system, but this hair
Bright implementation is not limited to embodiment defined by the embodiment of the present invention 2.
Meteorological optical range observing environment simulator 1 is simulated for adjusting particle water object changes of contents in air sample
Atmospheric visibility is slowly varying between 10m-3km.
As shown in figure 3, forward scattering visibility meter mainly includes transmitting unit 301, receiving unit 302, control unit 303
Deng.301 light source of transmitting unit is emitted in air through ovennodulation by one group of lens on light beam shaping；In light beam and air
Particle generates scattering process, and scattering light direction is different.Receiving unit 302 forms an angle with 301 shape of transmitting unit, receives
Optical signal is converted to electric signal by the photodetector of the scattering light of fixed-direction, receiving unit, and electric signal passes through control unit
303 processing are finally inversed by current weather optics visual range.One end of 301 outgoing beam of transmitting unit is the hair of forward scattering visibility meter
End is penetrated, one end that receiving unit 302 receives light beam is the receiving end of forward scattering visibility meter, control unit and host computer 6
Connecting pin is the control terminal of forward scattering visibility meter.
Standard forward scattering visibility meter 2, before installing a standard in meteorological optical range observing environment simulator 1
To scattering visibility meter 2, the transmission visibility meter central optical path that sample region is deviateed in meteorological optical range detection device is little
In 0.5m.Using change procedure of the visibility in simulated environment between 10m-3km, the quasi- forward scattering visibility meter is adjusted
System constants, until its measurement result and standard transmission visibility meter deviate in the section 20m-1500m is not more than ± 5%,
The section 1500m-3000m, which is deviateed, is not more than ± 10%.
As shown in Figs. 1-2, the detection system further include: transmission visibility meter 7, as shown in figure 4, transmission visibility meter 7
Including emitter 401, reception device 402 and light transmission path 403, the emitter 401 of the transmission visibility meter 7 is set
The one end for being the meteorological optical range observing environment simulator 1 is set, the reception device 403 of the transmission visibility meter is set
The other end in the meteorological optical range observing environment simulator 1 is set, the transmission visibility meter 7 is used to be the meteorology
The visibility simulated environment that optics visual range observing environment simulator 1 generates provides standard value.Further, the transmission can be shown in
Spending instrument is that a high-precision transmits visibility meter, and range 15m-30km, as error detection criterion device, the indicating value of output is considered as
Visibility observes reference standard value in simulated environment.World Meteorological Organization (world meteorological
Organization, WMO) the experimental results showed that, measure low visibility when, transmission visibility meter it is accurate more than preceding scattered instrument.This
Outside, it suitably calibrates and the transmissometer of maintenance, the measured value that can provide MOR when MOR is up to 60 times of its baselines only has about 10%
Standard error.Comprehensively consider " forward scattering type visibility meter general specification " (GJB 6298-2008) and China Meteorological Administration is " preceding
To scattering visibility meter observation criteria (tentative) " requirement to preceding scattered instrument measurement accuracy, transmiting visibility meter can be used as 3km
Following visibility measurement standard.
The adapter 4 that is mechanically fixed specifically includes: circular flange disk and the inner diameter size for being provided centrally with circular hole are adjustable
Fixture, one end of the circular flange disk is threadedly coupled with the optical filter, and the Lambertian source scatter plate is solid by jackscrew
It is scheduled in the circular hole of the other end of the circular flange disk, the other end of the circular flange disk passes through one end of screw and fixture
It is located by connecting by screw, the other end of the fixture steps up the transmitting terminal in the standard forward scattering visibility meter.Specifically
, it is mechanically fixed adapter and is process by the aluminum material of oxidizing blackening, the circular flange disk including being provided centrally with circular hole
With the adjustable fixture of inner diameter size.Circular flange disk and fixture are located by connecting by screw.The circular hole at the center of circular flange disk
Aperture be not less than model forward scattering visibility meter camera lens aperture to be measured, avoid blocking optical path.Fixture internal diameter is not less than to be measured
Model forward scattering visibility meter transmitting terminal outer diameter, it is ensured that installation can be stablized by being mechanically fixed adapter.Before use, first in round method
Lambertian source scatter plate is installed in blue disk stationary fixture side, then uses set screw stationary fixture, finally installs in the other side
Optical filter (neutral attenuating filters), to avoid scatter plate and optical filter generate scratch influence signal strength detection accuracy and
Repeatability.In use, ensuring the center geometric position of circular flange disk and forward scattering visibility meter transmitting terminal to be measured to just.
The Lambertian source scatter plate 3 is made of the milky optics diffusing glass through surface polishing, equal on two surfaces
It can produce strong light scattering phenomenon.To reduce bias light interference, photoelectric conversion signal-to-noise ratio is improved, preceding scattered instrument transmitting unit uses
The near-infrared light source of specific wavelength emits modulating light pulse.Preceding scattered instrument receiving unit is equipped with and transmitting unit wavelength and modulation frequency
The corresponding narrow band filter of rate and wave detector.I.e. receiving unit can only demodulate smooth arteries and veins identical with transmitting terminal wavelength and modulating frequency
Punching, it is ensured that response hardly is generated to other spuious optical signals.The Lambertian source scatter plate 3 is rectangular or round；Its mist degree
The range of value is 95% to 97%.
Lambertian source scatter plate 3 is mounted on forward scattering visibility meter transmitting unit side, is generated using transmitting unit
The light pulse foundation Lambertian source all the same with transmitting unit wavelength, frequency.Lambertian source is a kind of bright with isotropism
The light source of degree, except in addition to incident end face generates a small amount of reflected light, the transmitted light intensity approximate Lambertian distribution of incident beam is mainly used for
Realize approaches uniformity illumination.Optical scattering plate working principle is as shown in figure 5, analog generates light pulse strong scattering signal.
The optical filter 5 is neutral attenuating filters, and the optical filter 5 includes: the first optical filter and the second optical filter, can
Light-exposed transmitance is respectively 1% and 0.1%, for the quasi- transmitting unit light pulse strong scattering signal of optical scattering template die of decaying.
First optical filter and second optical filter are successively installed.
The host computer 6 is computer, and the host computer 6 passes through RS232 serial communication connecting line and standard forward scattering
The control unit of visibility meter 2, the control unit of forward scattering visibility meter to be measured and the control unit company for transmiting visibility meter 7
It connects, for recording transmission visibility meter and preceding scattered instrument measurement result.
In terms of visibility automatic observation accuracy requirement, " forward scattering type visibility meter general specification " (GJB
6298-2008) the permission measurement error of scattered instrument is ± 50m between 10m-500m before regulation, be between 500m-1500m ±
10%, it is ± 20% between 1500m-50000m." the forward scattering visibility meter observation rule of China Meteorological Administration's publication in 2011
Model (tentative) " regulation, indicating value limits of error in 1.5km or less are ± 10%, and indicating value is maximum allowable in 1.5km or more
Error is ± 20%.In visibility observed result application aspect, " horizontal visibility grade " (GB/T 33673-2017) is provided,
Horizontal visibility in 10km or more to be excellent, between 2km-10km be it is good, between 1km-2km be it is general, in 500m-1km
Between be it is poor, 50m-500m be it is poor, in 50m, the following are very poor.
Present invention is mainly used for detect acquisition China Meteorological Administration's meteorology special technology equipment to use the domestic preceding scattered of licensing
The instrument error of indication can be improved the consistency and accuracy of country, China Meteorological department surface-based observing station visibility detection result, be
The support of atmospheric visibility prediction and warning service providing technique.Instrument is dissipated before other models see also using the device of the invention.
Embodiment 3
The embodiment of the present invention 3 provides a kind of forward scattering visibility meter detection method.
As shown in fig. 6, the detection method includes the following steps:
Step 601, by standard forward scattering visibility meter, forward scattering visibility meter to be measured and transmission visibility meter installation
In meteorological optical range observing environment simulator；
Step 602, start the meteorological optical range observing environment simulator and enable to see that angle value is less than 10m；
Step 603, the parameter for adjusting the standard forward scattering visibility meter makes the standard forward scattering visibility meter
Measured value and it is described transmission visibility meter measured value difference be less than preset value；
Step 604, by Lambertian source scatter plate and optical filter by be mechanically fixed adapter be mounted on before the standard to
The transmitting terminal for scattering visibility meter, collects normal data；
Step 605, Lambertian source scatter plate and optical filter are mounted on the forward direction to be measured by being mechanically fixed adapter
The transmitting terminal for scattering visibility meter, collects detection data；
Step 606, the normal data and the detection data obtain the forward scattering visibility meter to be measured
Testing result.
Embodiment 4
The embodiment of the present invention 4 provides an a kind of preferred embodiment of forward scattering visibility detecting method, still
Implementation of the invention is not limited to embodiment defined by the embodiment of the present invention 4.
Establish meteorological optical range observing environment simulator 1 and meteorological optical range detection device (high-precision transmission energy
View degree instrument).The long 10m wide 3m high 3m of the visibility boiler-plate of meteorological optical range observing environment simulator 1, analog visibility
Variation between 10m-30km.The transmission-type visibility meter optics baseline length of meteorological optical range detection device is 40m,
MOR measurement range 15m-30km.Dynamic running process of the present invention is as follows.
1. preceding scattered instrument and standard forward scattering visibility meter to be measured are installed in meteorological optical range observing environment boiler-plate,
Its sample region is set to deviate transmission-type visibility meter central optical path no more than 0.5m；
2. starting transmission-type visibility meter and standard forward scattering visibility meter, air cleaning system is opened, by visibility
It adjusts to 10km or more, then starts particle water object generating device；
3. being less than 10m after transmission-type visibility meter output visibility value and after stablizing, natural subsidence, using computer and
RS232 serial communication connecting line synchronous recording transmits ten minutes visibility values of visibility meter and standard preceding scattered instrument output to be measured；
4. visibility meter visibility output valve to be transmitted is greater than 3000m, 1 measurement is completed；
5. visibility meter visibility output valve will be transmitted as standard value.If standard forward scattering visibility meter is in 20m-
The section 1500m deviates standard value and is not more than ± 5%, deviates in the section 1500m-3000m and is not more than ± 10%, thens follow the steps 6.
Otherwise, standard forward scattering visibility meter is adjusted repeatedly until meeting the requirements.
6. installing mechanical fixed transfer part 4 in standard forward scattering visibility meter transmitting terminal, pacify close to transmitting terminal side
Lambertian source scatter plate 3 is filled, after stablizing, the light scattering signal intensity value that scattered instrument measures before recording is dissipated as the Lambertian source
Penetrate 3 reference value of plate.Lambertian source scatter plate 3 can completely should be able to cover transmitting end section, haze value one to be rectangular or round
As be 96% ± 1%.
7. being mechanically fixed 4 other side of adapter and successively installing 380nm-780nm visible light integral transmitance is respectively 1% He
0.1% neutral attenuating filters, after stablizing, the corresponding output signal strength value of record standard forward scattering visibility meter, respectively
As two panels neutrality attenuating filters reference value.Abundant experimental results show to ensure that neutral attenuating filters reference value is stablized
It repeats, neutral attenuating filters dissipate instrument transmitting terminal before must being mounted on, and size should be able to cover 3 surface of Lambertian source scatter plate.
8. pair other repeat step 6 and step 7 with the Devices to test of model with standard forward scattering visibility meter.A large amount of weights
If renaturation experimental data shows the scattered light signal intensity value and 3 reference value of Lambertian source scatter plate, neutrality of Devices to test output
The deviation of attenuating filters reference value is not more than ± 10%, then indicating value accuracy of the Devices to test in 10m-3km measurement range
Meet " forward scattering type visibility meter general specification " (GJB 6298-2008) and China Meteorological Administration's " forward scattering visibility meter
Observation criteria (tentative) " related request.
9. detect the preceding scattered instrument of different model, need to repeat step 1 to step 5, selectes before the standard of the model to dissipating
Penetrate visibility meter.
The invention discloses a kind of forward scattering visibility meter detection system and method, the detection system includes: meteorology
Optics visual range observing environment simulator 1, Lambertian source scatter plate 3, is mechanically fixed switching at standard forward scattering visibility meter 2
Part 4, optical filter 5 and host computer 6；Low-visibility conditions are simulated by meteorological optical range observing environment simulator 1；And it is described
Lambertian source scatter plate 3 and the optical filter 5 are arranged at described be mechanically fixed on adapter 4；It is mechanically fixed respectively by described
Connector is detachably arranged in the transmitting terminal of the standard forward scattering visibility meter 2, normal data is acquired, by the machinery
Fixedly connected part is detachably arranged in the transmitting terminal of the forward scattering visibility meter to be measured, acquisition testing data；And compare
The normal data and the detection data obtain the testing result of the forward scattering visibility meter to be measured, realize with preceding
Instrument is dissipated in the direct detection of the error of indication in low visibility section.And Lambertian source can be dissipated using connector is mechanically fixed
Penetrate plate 3 and optical filter 5 be arranged in different model forward scattering visibility meter transmitting terminal, improve forward scattering visibility meter
The versatility of detection system.
The present invention is also provided with transmission visibility meter 7, produces to calibrate the meteorological optical range observing environment simulator 1
Raw simulated environment dissipates instrument before realizing and transmits the on-site test of relative error range between visibility meter.
Specifically, using the scattering coefficient of forward scattering visibility meter measurement and the transmitance of transmission visibility meter measurement,
Relative error range between scattered instrument and transmission visibility meter before being calculated using formula (1)-(3):
In formula:
MOR1For the meteorological optical range of forward scattering visibility meter measurement；
σ is the scattering coefficient of forward scattering visibility meter measurement；
MOR2For the meteorological optical range of transmission visibility meter measurement；
X is the baseline length for transmiting visibility meter；
T is the transmitance for transmiting visibility meter measurement；
δ is the relative error between preceding scattered instrument and the meteorological optical range for transmiting visibility meter measurement.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Specific examples are used herein to describe the principles and implementation manners of the present invention, the explanation of above embodiments
Method and its core concept of the invention are merely used to help understand, described embodiment is only that a part of the invention is real
Example is applied, instead of all the embodiments, based on the embodiments of the present invention, those of ordinary skill in the art are not making creation
Property labour under the premise of every other embodiment obtained, shall fall within the protection scope of the present invention.
Claims (10)
1. a kind of forward scattering visibility meter detection system, which is characterized in that the detection system includes:
Meteorological optical range observing environment simulator, Lambertian source scatter plate, is mechanically fixed standard forward scattering visibility meter
Adapter, optical filter and host computer；
The inside of the meteorological optical range observing environment simulator is arranged in the standard forward scattering visibility meter, described
Meteorological optical range observing environment simulator is for simulating low-visibility conditions；
The Lambertian source scatter plate and the optical filter are arranged at described be mechanically fixed on adapter；
The transmitting terminal for being mechanically fixed connector and being detachably arranged in the standard forward scattering visibility meter, the standard
The control terminal of forward scattering visibility meter is connected to the host computer by Serial Port Line, for acquiring normal data；
The transmitting terminal for being mechanically fixed connector and being detachably arranged in the forward scattering visibility meter to be measured, it is described to be measured
The control terminal of forward scattering visibility meter is connected to the host computer by Serial Port Line, is used for acquisition testing data；
The host computer is used for the normal data and the detection data, obtains the forward scattering visibility meter to be measured
Testing result.
2. forward scattering visibility meter detection system according to claim 1, which is characterized in that described to be mechanically fixed switching
Part specifically includes: it is provided centrally with the circular flange disk and the adjustable fixture of inner diameter size of circular hole, the one of the circular flange disk
End is threadedly coupled with the optical filter, and the Lambertian source scatter plate is fixed on the other end of the circular flange disk by jackscrew
Circular hole in, the other end of the circular flange disk is fixed by one end of screw and the fixture, the other end of the fixture
Step up the transmitting terminal in the standard forward scattering visibility meter.
3. forward scattering visibility meter detection system according to claim 1, which is characterized in that the detection system is also wrapped
Include: the emitter setting of transmission visibility meter, the transmission visibility meter is simulated in the meteorological optical range observing environment
The meteorological optical range observing environment simulator is arranged in the reception device of one end of device, the transmission visibility meter
The other end, the visibility simulation that the transmission visibility meter is used to generate for the meteorological optical range observing environment simulator
Environment provides standard value.
4. forward scattering visibility meter detection system according to claim 1, which is characterized in that the optical filter includes:
First optical filter and the second optical filter；
First optical filter and second optical filter are arranged side by side.
5. forward scattering visibility meter detection system according to claim 4, which is characterized in that first optical filter
Transmitance is 1%.
6. forward scattering visibility meter detection system according to claim 4, which is characterized in that second optical filter
Transmitance is 0.1%.
7. forward scattering visibility meter detection system according to claim 1, which is characterized in that the Lambertian source scattering
Plate is rectangular or round.
8. forward scattering visibility detection system according to claim 1, which is characterized in that the Lambertian source scatter plate
Haze value range be 95% to 97%.
9. forward scattering visibility meter detection system according to claim 1, which is characterized in that the host computer is to calculate
Machine.
10. a kind of forward scattering visibility meter detection method, which is characterized in that the detection method includes the following steps:
Standard forward scattering visibility meter, forward scattering visibility meter to be measured and transmission visibility meter are mounted on atmospheric optics view
In journey observing environment simulator；
Start the meteorological optical range observing environment simulator and enables to see that angle value is less than 10m；
The parameter for adjusting the standard forward scattering visibility meter makes measured value and the institute of the standard forward scattering visibility meter
The difference for stating the measured value of transmission visibility meter is less than preset value；
Lambertian source scatter plate and optical filter are mounted on the standard forward scattering visibility meter by being mechanically fixed adapter
Transmitting terminal, collect normal data；
Lambertian source scatter plate and optical filter are mounted on the forward scattering visibility meter to be measured by being mechanically fixed adapter
Transmitting terminal, collect detection data；
Compare the normal data and the detection data, obtains the testing result of the forward scattering visibility meter to be measured.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910124864.7A CN109709076A (en) | 2019-02-20 | 2019-02-20 | A kind of forward scattering visibility meter detection system and method |
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| CN201910124864.7A CN109709076A (en) | 2019-02-20 | 2019-02-20 | A kind of forward scattering visibility meter detection system and method |
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| CN112345497A (en) * | 2020-11-24 | 2021-02-09 | 河南省计量科学研究院 | Atmospheric visibility meter calibration system and calibration method thereof |
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