CN206710302U - A kind of device of infrared spectrometry Water Vapor Content using in direct sunlight - Google Patents
A kind of device of infrared spectrometry Water Vapor Content using in direct sunlight Download PDFInfo
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- CN206710302U CN206710302U CN201720546464.1U CN201720546464U CN206710302U CN 206710302 U CN206710302 U CN 206710302U CN 201720546464 U CN201720546464 U CN 201720546464U CN 206710302 U CN206710302 U CN 206710302U
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- water vapor
- aperture diaphragm
- splitting system
- beam splitting
- vapor content
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Abstract
The utility model discloses a kind of Water Vapor Content measurement apparatus based on spectral measurement mode, include beam splitting system, detector array, data processing module, with outer veiling glare stripper, aperture diaphragm and sighting device.When using the sighting device alignment sun, direct light from the sun passes through aperture diaphragm, the only optical signal in remaining near infrared wavelength region after with outer veiling glare stripper, the optical signal is divided by beam splitting system to be formed bands of a spectrum and images in detector array photosurface, detector array produces spectral signal, handled through data processing module, obtain moisture content size.It is different from the narrow band detection mode of conventional actinometer, it is by measuring the infrared spectrum in direct sunlight, calculate the radiation intensity of characteristic wave strong point and account for the ratio of background radiation, Water Vapor Content is obtained with this, have the advantages that wavelength it is accurate, not by filter performance change is influenceed, results of spectral measurements is easy to monitoring instrument state.
Description
Technical field
The steam field of measuring technique that the utility model belongs in meteorology, it is related to a kind of using red in direct sunlight
External spectrum measures the device of Water Vapor Content.
Background technology
Steam plays key effect during atmospheric physics, Atmospheric Chemistry and climate change etc. are many, and it is with numerous days
Gas phenomenon is directly related, is an important factor for dominating weather system.Compared with other compositions in air, point of steam spatially
Cloth is very uneven, change in time also highly significant.Moisture content in air, it is the important letter for deducing Changes in weather
Breath, and the necessary condition of Precipitation forecast and precipitation, in weather forecast, earth environment monitoring, space remote sensing and atmospheric radiation
The fields such as transmission calculating are required for this parameter.
In traditional measurement, typically by sounding means, it is then long-pending that each layer in air of humidity is measured using sounding balloon
Divide and calculate Water Vapor Content.This method is restricted by sounding condition, and cost is higher, and exist balloon journey error and
The discontinuity of measurement data, it is not enough to differentiate the change in time and space of steam.Afterwards with the development and raising of Detection Techniques, successively
Develop the means such as microwave radiometer, actinometer, GPS technology to estimate the moisture content in air and inverting.Its
In, microwave radiometer is by the integration total precipitable water surveyed on bright temperature inverting scanning pattern, including Ground-Based Microwave Radiometer and star
Borne microwave radiometer two ways, they are had a great influence by cloud or ambient temperature, and when precipitation occurs raindrop presence pair
Make it that at this moment microwave radiometer is difficult to provide available data in the influence of radiation.Actinometer then makees light source using the sun,
The water vapor absorption transmitance of some wave bands in air is measured, using its relation with moisture content come inverting moisture content.GPS skills
Art mainly by measuring satellite signal transit to the time delay of GPS, then considers the source of error and disappeared item by item
Except method, the wet zenith delay relevant with steam is obtained, and then solve total precipitable water.Recently as Chinese Beidou satellite navigation
The construction and development of system, identical with GPS technology principle, a kind of atmosphere vapour measuring method based on big-dipper satellite is also carried
Go out.
Compared with GPS technology or based on the method for big-dipper satellite, actinometer method principle is simple, and implementation is lightly just
Take.And it is not limited by space-time, outdoor flow measurement can be carried out.The instrument for being currently based on actinometer method is usual
It is a binary channels actinometer, service band is inhaled for the non-steam of near-infrared 936nm water vapor absorptions passage and 870nm of arrowband
Passage is received, two passages are compared to be influenceed to eliminate Rayleigh scattering and aerosol scattering, so as to extract Water Vapor Content information.It
It is because the size of Water Vapor Content can be from several millimeters to several under general condition so using the absorption band near 936nm
Centimetre, although optics and infrared band have many absorption band of water vapor, most absorption band of water vapor or too strong so that
Solar radiation in moist atmosphere in the absorption band is completely absorbed and can not measure residual radiation intensity, or water vapor absorption
Band is too weak, causes the solar radiation in compared with dry atmosphere in the absorption band to think moisture content not by absorption substantially
It is zero.After considering these factors, the absorption band of water vapor near 936nm is the absorption that absorbability is moderate, is best suited for measurement
Band, thus be widely adopted in actinometer method measures moisture content.And to realize the 936nm water vapor absorptions of arrowband and lead to
Road, the interferometric filter using arrowband is usually required in actinometer.Due to interferometric filter in long-term use stability
It is poor, it may occur that different degrees of aging, it is that peak wavelength, bandwidth and transmitance can gradually change that it, which is mainly showed, is led
Cause moisture content measurement inaccurate.Therefore actinometer needs periodically to be calibrated, and is made troubles to practical application.For
This, we devise a kind of actinometer based on spectral measurement mode.
The content of the invention
The purpose of this utility model is to provide a kind of Water Vapor Content measurement apparatus based on spectral measurement mode, and normal
Different with the narrow band detection mode of actinometer, it calculates characteristic wavelength by measuring the infrared spectrum in direct sunlight
The radiation intensity at place and the ratio for accounting for background radiation, Water Vapor Content is obtained with this.
In order to achieve the above object, the utility model adopts the following technical scheme that：
A kind of device of infrared spectrometry Water Vapor Content using in direct sunlight, include beam splitting system,
Detector array, data processing module, with outer veiling glare stripper, aperture diaphragm, sighting device.During actual use, sighting device
For being directed at the sun, when the sun is located at the field of view center of sighting device regarding disc, the sun is also in the visual field of aperture diaphragm.
Direct light from the sun passes through aperture diaphragm, is only left after with outer veiling glare stripper in a certain section of infrared wavelength range
Optical signal, the optical signal are entered inside beam splitting system by the slit of beam splitting system, and the bands of a spectrum formed after light splitting image in battle array
Row detector photosurface, detector produce spectral signal, for later analysis processing, obtain moisture content size.
The beam splitting system is the core of device, and its operating wavelength range is infrared band, and effect is to entering system
Light radiation is divided, and makes compound optical dispersion into a long and narrow bands of a spectrum, and focal imaging is on focal plane.The detector array
It is mounted at focal plane, accurate location is overlapped as foundation with the photosurface of detector array with the focal plane of beam splitting system.It is described
Data processing module is located at outside beam splitting system, is connected by data wire with detector array, drives its normal work, and gather
Spectral signal caused by detector array, carry out calculating processing.
Due to not only containing infra-red radiation, also ultraviolet radioactive and visible ray etc. in sunshine, and both rear intensity exists
Shared ratio is close to 60% in total solar radiation.And the operating wavelength range of beam splitting system described above is infrared band, and
Only it is a part near infrared band.Therefore, it is necessary to before optical signal enters beam splitting system, one is passed to outer miscellaneous
Light stripper, to filter out the wave band beyond beam splitting system operating wavelength range, reduce the outer veiling glare of band in light path and final as far as possible
Influence to output signal.Before the outer veiling glare stripper of the band is positioned over the entrance slit of beam splitting system, its main function is to allow
Light radiation in beam splitting system operating wavelength range to the light radiation beyond the scope by and then realizing and being substantially filtered out.
Direct sunlight is measured in order to realize, one need to be also disposed at the entrance slit of beam splitting system suitably
Aperture diaphragm, to shield the scattering light from sky, it is ensured that the light during slit alignment sun into beam splitting system is mainly direct projection
Sunshine.Meanwhile one sighting device of fixed placement in beam splitting system, for aiming at the sun during actual measure.Sighting device
Installation parallel with aperture diaphragm, the angle of visual field overall planning of the two：On the one hand, the angle of visual field of sighting device should be than aperture diaphragm
Smaller, after such sighting device alignment sun, the sun is necessarily in aperture diaphragm visual field；On the other hand, aperture diaphragm regards
Field should be more slightly larger than solar apparent diameter, also leaves certain space while ensureing that incident light is direct sunlight, makes the sun in short-term
It is interior to be unlikely to remove visual field rapidly, it is easy to be aligned and measures.
The utility model is according to the water vapor absorption characteristic of infrared band, by measuring the infrared spectrum in direct sunlight,
The residual intensity for obtaining water vapor absorption characteristic wave strong point accounts for the ratio of background radiation, and calculating the steam in observation journey with this contains
Amount.Compared with prior art, the utility model has clear advantage and beneficial effect：
1. being measured using spectral measurement mode instead of narrow channel, wavelength is accurate, eliminates interferometric filter performance change pair
Influence caused by measurement；
2. because the line contour of sunshine is more stable, therefore results of spectral measurements can be used as mark, monitoring instrument shape
State and water vapor absorption feature, ensure measurement result accurately and reliably；
3. device is lightly portable, it is easy to fixed point monitoring and outdoor flow to measure.
Brief description of the drawings
Fig. 1 is structural principle block diagram of the present utility model, including with outer veiling glare stripper 1, aperture diaphragm 2, beam splitting system
3rd, detector array 4, data processing module 5, sighting device 6.
Fig. 2 is the structural representation of sighting device, including convergent lens 7, light cylinder 8, visual field film viewing screen 9.
Fig. 3 is the structural representation of aperture diaphragm.The incidence end of limit beam light cylinder 11 is installed on outer veiling glare stripper 10.Limit
Beam light cylinder 11 and entrance slit 12 are combined, and limit incident beam jointly.
Fig. 4 is the structure principle chart of beam splitting system, including plane mirror 13, collimating mirror 14, grating 15, focus lamp 16.
Detector array 17 is installed in beam splitting system.
Embodiment
A kind of as shown in figure 1, infrared spectrometry atmospheric water using in direct sunlight involved by the utility model
The device of vapour content, include with outer veiling glare stripper 1, aperture diaphragm 2, beam splitting system 3, detector array 4, data processing mould
Block 5, sighting device 6.Wherein, beam splitting system 3 is the main body of device, is installed before its entrance slit and secures aperture diaphragm 2, aperture
The incidence end of diaphragm 2 then placed with outer veiling glare stripper 1.Installation placed detector array 4 at the focal plane of beam splitting system 3,
It exports the bottom control room through cable transmission to beam splitting system 3, is connected with data processing module 5.Meanwhile in beam splitting system 3
Outside, placed sighting device 6, and parallel with aperture diaphragm 2.During actual measurement, the sun is set to regard disc by sighting device 6
Positioned at field of view center, because sighting device 6 is parallel with aperture diaphragm 2, therefore the sun also is located in the visual field of aperture diaphragm 2.Come
Aperture diaphragm 2 is passed through from the direct light of the sun, after with outer veiling glare stripper 1, only the light of remaining near infrared band passes through narrow
Seam enters beam splitting system 3.Beam splitting system 3 is divided to optical signal, makes compound optical dispersion into a long and narrow bands of a spectrum, and focus on
It is imaged on the detector array 4 on focal plane.Analog signal caused by detector array 4 is put through data processing module 5
Big and analog-to-digital conversion, obtains the spectroscopic data of near infrared band, extracts 936nm light signal strength, and according to line contour
Its original background intensity is calculated, rule of thumb formula calculates Water Vapor Content.
In order to be easy to be aligned the sun in actual applications, sighting device 6 is using structure shown in Fig. 2, the focus of convergent lens 7
It is located just at the center of visual field film viewing screen 9.Cross hairs is carved with the center of film viewing screen, and when aiming at the sun, it is concentrated that the sun regards disc
Lens 7 are focused into a bright spot, adjust sighting device 6, bright spot is located at cross hairs center, just complete sun alignment.Due to
Sighting device 6 is parallel with aperture diaphragm 2, and now the sun also one is positioned in the visual field of aperture diaphragm 2.
Fig. 3 is the structural representation of aperture diaphragm 2.The incidence end of limit beam light cylinder 11 is arranged on outer veiling glare stripper 10,
Visible ray of the wavelength less than 750nm and ultraviolet will be filtered, it is impossible into beam splitting system.Limit beam light cylinder 11 and entrance slit 12
Joint, play a part of limiting incident beam.Depending on the subtended angle of disc it is about 0.5 ° in view of the sun, the visual field of aperture diaphragm 2 is set
About 2 ° are counted into, it is bigger regarding the subtended angle of disc than the sun, leave certain surplus when being directed at the sun so that the sun is unlikely to fast during measurement
Speed removes visual field, is easy to measure and operates.
Fig. 4 is the structure principle chart of beam splitting system.Beam splitting system 3 uses C-T horizontal symmetrical formula light channel structures, including incidence
Slit 12, plane mirror 13, collimating mirror 14, grating 15, focus lamp 16.Enter the light of beam splitting system through entrance slit 12, shine
Penetrate on plane mirror 13, collimating mirror 14 is reached after mirror-reflection, form collimated light beam and be projected to grating 15, after dispersion
Bands of a spectrum are by focus lamp 16, and focal imaging is on the photosurface of detector array 17.
Claims (4)
1. a kind of device of infrared spectrometry Water Vapor Content using in direct sunlight, includes beam splitting system, battle array
Row detector, data processing module, with outer veiling glare stripper, aperture diaphragm and sighting device, it is characterised in that：With beam splitting system
For main body, the incidence end of aperture diaphragm is placed on outer veiling glare stripper, aperture diaphragm is mounted on the incidence of beam splitting system
Before slit, sighting device is arranged on outside beam splitting system, and its sensing is consistent with aperture diaphragm, and detector array is installed on light splitting system
At the focal plane of system, its output is connected through cable with data processing module.
2. the device of the infrared spectrometry Water Vapor Content according to claim 1 using in direct sunlight, its
It is characterised by：The outer veiling glare stripper of described band is a piece of or one group of infra-red transmitting filter.
3. the device of the infrared spectrometry Water Vapor Content according to claim 1 using in direct sunlight, its
It is characterised by：Described aperture diaphragm is that light cylinder is added before a slit, the matching of the two size, common limitation measurement visual field.
4. the device of the infrared spectrometry Water Vapor Content according to claim 1 using in direct sunlight, its
It is characterised by：Described sighting device is made up of optical lens and light cylinder, and its optical axis is parallel with aperture diaphragm, can regard the sun
Disc focal imaging.
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| CN201720546464.1U CN206710302U (en) | 2017-05-17 | 2017-05-17 | A kind of device of infrared spectrometry Water Vapor Content using in direct sunlight |
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| CN201720546464.1U CN206710302U (en) | 2017-05-17 | 2017-05-17 | A kind of device of infrared spectrometry Water Vapor Content using in direct sunlight |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110504195A (en) * | 2019-08-22 | 2019-11-26 | 上海华力集成电路制造有限公司 | The aqueous vapor monitoring method of reaction cavity |
| CN111579529A (en) * | 2020-04-17 | 2020-08-25 | 汕头大学医学院 | Dynamic pre-detection testing device and method based on laser remote sensing |
| JP2020130088A (en) * | 2019-02-22 | 2020-08-31 | 株式会社ナイルワークス | Farm field analytic method, farm field analytic program, farm field analyzer, drone system, and drone |
| CN113203480A (en) * | 2021-05-06 | 2021-08-03 | 上海航天电子通讯设备研究所 | Differential atmospheric water vapor delay measurement system and method |
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2017
- 2017-05-17 CN CN201720546464.1U patent/CN206710302U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020130088A (en) * | 2019-02-22 | 2020-08-31 | 株式会社ナイルワークス | Farm field analytic method, farm field analytic program, farm field analyzer, drone system, and drone |
| JP7075127B2 (en) | 2019-02-22 | 2022-05-25 | 株式会社ナイルワークス | Field analysis method, field analysis program, field analysis device, drone system and drone |
| CN110504195A (en) * | 2019-08-22 | 2019-11-26 | 上海华力集成电路制造有限公司 | The aqueous vapor monitoring method of reaction cavity |
| CN111579529A (en) * | 2020-04-17 | 2020-08-25 | 汕头大学医学院 | Dynamic pre-detection testing device and method based on laser remote sensing |
| CN113203480A (en) * | 2021-05-06 | 2021-08-03 | 上海航天电子通讯设备研究所 | Differential atmospheric water vapor delay measurement system and method |
| CN113203480B (en) * | 2021-05-06 | 2022-05-27 | 上海航天电子通讯设备研究所 | Differential atmospheric water vapor delay measurement system and method |
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