CN204989014U - Novel laser atmosphere transmission appearance visibility measurement system - Google Patents
Novel laser atmosphere transmission appearance visibility measurement system Download PDFInfo
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- CN204989014U CN204989014U CN201520434935.0U CN201520434935U CN204989014U CN 204989014 U CN204989014 U CN 204989014U CN 201520434935 U CN201520434935 U CN 201520434935U CN 204989014 U CN204989014 U CN 204989014U
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Abstract
The utility model relates to a novel laser atmosphere transmission appearance visibility measurement system, it includes transmitter unit and receiver unit, the transmitter unit mainly comprises laser instrument and transmission lens, the receiver unit is become by two above receiver device, and the position of these two above receivers has the contained angle corresponding to the base -line of length separately between the base -line of the length separately of these two above receivers, the receiver mainly comprises receiver lens, adjustable field stop, lens, band -pass optical filtering, condensing lens and optical sensor, and adjustable field stop installs in the focus position of receiver lens, the transmitter can be at the base -line angle range internal rotation of the length separately of receiver. The utility model discloses can be according to current visibility, realize the intelligent regulation of the transmission appearance base length and the receiver angle of vision, multiple scattering's influence in the time of can effectually restraining the low visibility, when reducing the low visibility, the measuring error that arouses by multiple scattering.
Description
Technical field
The utility model relates to visibility Detection Techniques field, particularly a kind of new pattern laser atmospheric transmission instrument Visibility Measures System.
Background technology
Atmospheric visibility be from object can in sight and identification angle, with distance describe air transparency (or muddy degree) physical quantity.International Civil Aviation Organization (ICAO) to the definition that visibility provides is: when observing under light ground, can see and recognize the ultimate range of the black objects thing being positioned at subaerial appropriate size; Under unglazed background, can see and recognize the ultimate range that light intensity is the light about 1K colour temperature.External after establishing Koschmieder law, just start the research being devoted to visibility measurement technology.Transilluminator is the visibility measurement instrument of comparatively early utility model, and the RVR being mainly used in the visibility automatic observing system on airport at present measures.
As far back as the eighties in 20th century, domesticly just transmission measurement visibility to be studied.First Changchun meteorologic instrument research institute develops transmission-type visibility meter---TS type transmissometer, fill up the domestic blank in this field.Sichuan Chengdu Hongyuv Technologies Co., Ltd. have developed transmission-type visibility detector HY-VT100 and other models, compare same kind of products at abroad, this instrument price is moderate, Lay Importance on Practical, and in some specific occasions, such as tunnel and some highways obtain certain application.The principle of work of transilluminator is: based on the Transmissivity measurement of sample air, calculate atmospheric extinction coefficient, inverting draws atmospheric visibility.Transmission beam method surveys visibility, without the need to making evenly hypothesis to air, but directly detects atmospheric transmittance.Stricti jurise is said, the atmospheric extinction coefficient obtained with transmission measurement is more more accurate than scattering method.But under the low visibility weather such as rain, mist condition, because droplet, raindrop particle size are far longer than exploring laser light wavelength, produce serious Multiple Scattering phenomenon, its impact can not be ignored.When transilluminator measures visibility, the light beam arriving receiver comprises former transmitted beam, single scattered light and Multiple Scattering light.Visibility measurement principle lambert Bill (Bouguer-Lambert) law is applicable to the situation only considering single scattering condition.Under low visibility condition, Multiple Scattering phenomenon is serious, uses Bouguer-Lambert law can cause comparatively big error.Therefore Multiple Scattering need be considered when atmospheric laser transilluminator measures visibility.
Transilluminator product both domestic and external at present just suppresses for parasitic light, and the Multiple Scattering phenomenon do not produced for light source self is studied.The utility model gives the atmospheric laser transilluminator Visibility Measures System considering Multiple Scattering design.
Summary of the invention
For the deficiency existing for prior art, the utility model provides a kind of atmospheric laser transilluminator Visibility Measures System considering Multiple Scattering, under it can be applicable to low visibility condition, when Multiple Scattering phenomenon is serious, visibility, MOR and RVR measure, and when can reduce low visibility, Multiple Scattering is on the impact of visibility measurement precision.
The utility model solves its technical matters and is achieved through the following technical solutions:
A kind of new pattern laser atmospheric transmission instrument Visibility Measures System, is characterized in that: comprise transmitter unit and receiver unit, described transmitter unit is primarily of laser instrument and diversing lens composition; Described receiver unit is made up of two or more receiver, and the position of this two or more receiver corresponds to the baseline of respective length, has angle between the baseline of the respective length of this two or more receiver; Described receiver leads to optical filtering, condenser and optical sensor composition primarily of receiver lens, adjustable field stop, lens, band, and adjustable field stop is installed on the focal position of receiver lens; Described transmitter can rotate in the baseline angular range of the respective length of receiver.
And described receiver unit is made up of the first receiver and the second receiver, these two receivers respectively correspondence are installed on the first length baseline and the second length baseline, have angle between this first length baseline and the second length baseline.
And the length of the first described length baseline is 30m, the length of described second length baseline is 75m.
Advantage of the present utility model and beneficial effect are:
1, the utility model atmospheric laser transilluminator Visibility Measures System, for the Multiple Scattering phenomenon under low visibility condition, the impact that atmospheric laser transilluminator measures visibility is studied in theory, and simulation analysis has been carried out to the Laser Transmission process under different base length and receiver field of view situation, the condition suppressing Multiple Scattering impact is given from base length and receiver field of view two aspects.
2, the utility model atmospheric laser transilluminator Visibility Measures System, comprise first receiver and the second receiver with different baseline, when being applicable to low visibility respectively and high-visibility time measurement, and between two receivers, certain angle is set, transmitter has can the function of deflection angle, meet a transmitter and between platform receiver with the use of; And each receiver is all according to there being adjustable field stop, by regulating the size of receiver field of view, the impact of Multiple Scattering can be suppressed.
3, the utility model atmospheric laser transilluminator Visibility Measures System, the principle of its foundation is: during due to low visibility, and Multiple Scattering phenomenon is serious, therefore chooses Short baseline and can reduce Multiple Scattering impact; During high-visibility, Multiple Scattering is less on visibility measurement impact, can ignore; And when field stop reduces, the field angle of the corresponding first or second receiver reduces, and the Multiple Scattering light of reception reduces.As initial visibility measurement value V in the utility model
0the first receiver of 30m baseline is adopted to carry out double measurement, initial visibility measurement value V during <500m
0during >500m, the second receiver of 75m baseline is adopted to carry out double measurement, and, initial visibility measurement value V
0during <1500m, measuring system is at consideration Multiple Scattering MODE of operation, the size of the field stop of the first receiver or the second receiver need be regulated, to regulate the size of receiver field of view, (size of field angle regulates according to suppressing the theoretical value of Multiple Scattering, simulation result provides field angle when being 1mrad, better on the inhibition of Multiple Scattering impact), suppress the impact of Multiple Scattering.
4, atmospheric laser transilluminator Visibility Measures System of the present utility model, devise the atmospheric laser transilluminator visibility recording geometry that is considered multiple scattering, this system can according to current visibility, realize the Intelligent adjustment of transilluminator base length and receiver field of view, effectively can suppress the impact of Multiple Scattering during low visibility, when reducing low visibility, the measuring error caused by Multiple Scattering.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of atmospheric laser transilluminator Visibility Measures System of the present utility model;
Fig. 2 is the receiver structure schematic diagram in the utility model.
Description of reference numerals
Angle between 1-transmitter unit, 2-first receiver, 3-second receiver, 4-transmitter laser beam divergence, 5-receiver field of view, 6-two baseline, 7-first length baseline, 8-second length baseline, 9-receiver lens, 10-field stop (adjustable), 11-lens, 12-band logical optical filtering, 13-condenser, 14-optical sensor.
Embodiment
Below by specific embodiment, the utility model is described in further detail, and following examples are descriptive, is not determinate, can not limit protection domain of the present utility model with this.
A kind of new pattern laser atmospheric transmission instrument Visibility Measures System, comprises transmitter unit and receiver unit, and described transmitter unit 1 is primarily of laser instrument and diversing lens composition; Described receiver unit is made up of two or more receiver, and the position of this two or more receiver corresponds to the baseline of respective length, has angle between the baseline of the respective length of this two or more receiver; Described receiver forms primarily of receiver lens 9, adjustable field stop 10, lens 11, band logical optical filtering 12, condenser 13 and optical sensor 14; Described transmitter can rotate in the baseline angular range of the respective length of receiver.In the present embodiment, receiver unit is made up of the first receiver 2 and the second receiver 3, and these two receivers respectively correspondence are installed on the first length baseline 7 and the second length baseline 8, have angle 6 between this first length baseline and the second length baseline.Transmitter has transmitter laser emission angle 4.First receiver and the second receiver all have receiver field of view 5.The length of the first length baseline is 30m, and the length of the second length baseline is 75m.
The principle of work of new pattern laser atmospheric transmission instrument Visibility Measures System of the present utility model is:
When atmospheric visibility is lower, adopts atmospheric laser transilluminator Visibility Measures System of the present invention to detect, comprise the steps:
(1). system initialization: measuring system is with initial baseline length L
0=30m and Primary receiver field angle θ
0=30mrad carries out visibility measurement, obtains initial visibility measurement value V
0=76.9m; Now, atmospheric visibility is lower.
(2). choose base length: according to initial visibility measurement value V
0=76.9m < 500m, selects the first receiver of base length 30m baseline to measure, and determines that mode of operation is consider the mode of operation of Multiple Scattering simultaneously.
(3). receiver field of view adjustment: initial visibility measurement value V
0=76.9m < 1500m, the impact of Multiple Scattering need be considered, measurement need regulate the size of the field stop of receiver, to regulate the size of receiver field of view, the effect of the impact of suppression Multiple Scattering is made to reach best, when field stop reduces, corresponding first field angle reduces, and the Multiple Scattering light of reception reduces.
(4). in adjustment and later measuring process, as V appears in gained visibility value
0>500m, V
0during >1500m range, base length and mode of operation need be reselected.
The concrete measurement data of this process is as follows:
From data in table, when receiver field of view is kept to 1mrad gradually, the Multiple Scattering light received reduces, visibility value reduces, when receiver field of view is 1mrad and theoretical simulation result coincide, namely field of view of receiver angle is that the measurement result accuracy of 1mrad measuring system is best, better on the inhibition of Multiple Scattering impact.
When atmospheric visibility is slightly high, adopts atmospheric laser transilluminator Visibility Measures System of the present invention to detect, comprise the steps:
(1). system initialization: measuring system is with initial baseline length L
0=30m and Primary receiver field angle θ
0=1mrad carries out visibility measurement, obtains initial visibility measurement value V
0=762.7m; Now, atmospheric visibility is higher;
(2). choose base length: according to initial visibility measurement value 500m < V
0=762.7m < 1500m, selects the second receiver of base length 75m baseline to measure, and determines that mode of operation is consider the mode of operation of Multiple Scattering simultaneously;
(3). receiver field of view adjustment: initial visibility measurement value V
0=762.7m < 1500m, the impact of Multiple Scattering need be considered, measurement need regulate the size of the field stop of receiver, to regulate the size of receiver field of view receiver field of view (FOV, FeildofView), the effect of the impact of suppression Multiple Scattering is made to reach best, when field stop reduces, corresponding first field angle reduces, and the Multiple Scattering light of reception reduces, and concrete adjustment is as the criterion depending on actual state of visibility depending on concrete adjustment.
(4). in adjustment and later measuring process, as gained visibility value has V
0<500m or V
0the range of >1500m, need reselect base length and mode of operation.
From data in table, when receiver field of view is kept to 1mrad gradually, the Multiple Scattering light received reduces, visibility value reduces, when receiver field of view is 1mrad and theoretical simulation result coincide, namely field of view of receiver angle is that the measurement result accuracy of 1mrad measuring system is best, better on the inhibition of Multiple Scattering impact.
When atmospheric visibility is higher, adopts atmospheric laser transilluminator Visibility Measures System of the present invention to detect, comprise the steps:
(1). system initialization: measuring system is with initial baseline length L
0=30m and Primary receiver field angle θ
0=30mrad carries out visibility measurement, obtains initial visibility measurement value V
0=1517m.
(2). choose base length: according to initial visibility measurement value V
0=1517m > 1500m, selects the second receiver of base length 75m baseline to measure, without the need to considering Multiple Scattering, without the need to regulating receiver field of view.
(3). in adjustment and later measuring process, as gained visibility value has V
0<500m or V
0range in >1500, need reselect base length and mode of operation.
The concrete measurement data of this process is as follows:
From data in table, time visibility is higher, regulate field angle, the transmitance measured by measuring system and visibility variation not quite, illustrate that now transilluminator measurement result affects little by Multiple Scattering.
Although disclose embodiment of the present utility model and accompanying drawing for the purpose of illustration, but it will be appreciated by those skilled in the art that: in the spirit and scope not departing from the utility model and claims, various replacement, change and amendment are all possible, therefore, scope of the present utility model is not limited to the content disclosed in embodiment and accompanying drawing.
Claims (3)
1. a new pattern laser atmospheric transmission instrument Visibility Measures System, is characterized in that: comprise transmitter unit and receiver unit, and described transmitter unit is primarily of laser instrument and diversing lens composition; Described receiver unit is made up of two or more receiver, and the position of this two or more receiver corresponds to the baseline of respective length, has angle between the baseline of the respective length of this two or more receiver; Described receiver leads to optical filtering, condenser and optical sensor composition primarily of receiver lens, adjustable field stop, lens, band, and adjustable field stop is installed on the focal position of receiver lens; Described transmitter can rotate in the baseline angular range of the respective length of receiver.
2. a kind of new pattern laser atmospheric transmission instrument Visibility Measures System according to claim 1, it is characterized in that: described receiver unit is made up of the first receiver and the second receiver, these two receivers respectively correspondence are installed on the first length baseline and the second length baseline, have angle between this first length baseline and the second length baseline.
3. a kind of new pattern laser atmospheric transmission instrument Visibility Measures System according to claim 2, it is characterized in that: the length of the first described length baseline is 30m, the length of described second length baseline is 75m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520434935.0U CN204989014U (en) | 2015-06-23 | 2015-06-23 | Novel laser atmosphere transmission appearance visibility measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520434935.0U CN204989014U (en) | 2015-06-23 | 2015-06-23 | Novel laser atmosphere transmission appearance visibility measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204989014U true CN204989014U (en) | 2016-01-20 |
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ID=55123371
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520434935.0U Expired - Fee Related CN204989014U (en) | 2015-06-23 | 2015-06-23 | Novel laser atmosphere transmission appearance visibility measurement system |
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| Country | Link |
|---|---|
| CN (1) | CN204989014U (en) |
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2015
- 2015-06-23 CN CN201520434935.0U patent/CN204989014U/en not_active Expired - Fee Related
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20190623 |