CN208076382U - Water body multi-wavelength optical attenuation coefficient measuring device - Google Patents
Water body multi-wavelength optical attenuation coefficient measuring device Download PDFInfo
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- CN208076382U CN208076382U CN201820400355.3U CN201820400355U CN208076382U CN 208076382 U CN208076382 U CN 208076382U CN 201820400355 U CN201820400355 U CN 201820400355U CN 208076382 U CN208076382 U CN 208076382U
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Abstract
The utility model discloses a kind of water body multi-wavelength optical attenuation coefficient measuring devices, including nonmonochromatic source, multi-wavelength probe unit, the mobile mechanism for connecting and driving multi-wavelength probe unit to move along light path with multi-wavelength probe unit and the central processing unit being connect with multi-wavelength probe unit, multi-wavelength probe unit includes at least one detector, and the size of the test surface of detector is more than the size of the hot spot of required detection.Nonmonochromatic source sends out the light beam for including multiple wavelength, the initial irradiance value or initial single pulse energy magnitude or prompt radiation performance number or initial signal intensity value of the light beam of each wavelength are measured by multi-wavelength probe unit, then multi-wavelength probe unit is driven to be moved along light path by mobile mechanism, for the corresponding parameter information of each wavelength measurement different distance, the corresponding multigroup measurement data of each wavelength is fitted, the optical attenuation coefficient value of the corresponding water body of each wavelength is respectively obtained.
Description
Technical field
The utility model is related to underwater optics field of detecting, and in particular to a kind of water body multi-wavelength optical attenuation coefficient measurement
Device.
Background technology
In recent years, the application of underwater optics detection is more and more extensive, including water pollution detection, laser acquisition etc., and shows
Some underwater optics imaging devices do not have general performance indicator and standard, i.e., different imaging devices is under different water conditions
There is no relevance between obtained the farest imaging range result.Currently, weighing Underwater Imaging under the general varying environment of academia
The performance parameter of distance is described using optical attenuation coefficient and its multiple, however absorption and scattering due to water body to light
It is very complicated physical process, the accurate attenuation coefficient for measuring water body is extremely difficult.Currently, generally use instrument is seen in the world
The decaying of light energy in water is surveyed, to determine its attenuation coefficient to light, the AC series attenuation coefficients produced such as Wetlabs measure
Instrument, however the price of the product reaches millions of, is not particularly suited for business application.
Therefore it provides one kind is at low cost, easy to use, it is not only non-to measure accurate water body optical attenuation coefficient measuring device
The important link of often necessary and underwater optics Detection Techniques development.
Utility model content
The utility model is directed to problems of the prior art, provide it is a kind of it is at low cost, easy to use, measure it is accurate
Water body multi-wavelength optical attenuation coefficient measuring device.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is：A kind of water body multi-wavelength optical decaying system
Number measuring devices, including nonmonochromatic source, multi-wavelength probe unit, connect and drive described more with the multi-wavelength probe unit
The mobile mechanism and the central processing unit being connect with the multi-wavelength probe unit that wavelength detection unit is moved along light path, it is described
Multi-wavelength probe unit includes at least one detector, and the size of the test surface of the detector is more than the hot spot of required detection
Size.
Further, the nonmonochromatic source is broad spectrum light source, and the broad spectrum light source rear is equipped with rotating filtering piece,
The multi-wavelength probe unit includes a multi-wavelength detector.
Further, the multi-wavelength detector is color cmos camera or colorful CCD camera.
Further, the front of the multi-wavelength detector is equipped with iris diaphgram.
Further, the nonmonochromatic source is monochromatic source array, and the multi-wavelength probe unit includes and the list
The array of the one-to-one detector composition of monochromatic source in color light source array.
Further, the detector is illumination photometer or power meter or energy meter or single point detector or planar array detector.
Further, the detector is illumination photometer or power meter or energy meter, and the front of each detector is successively
Equipped with spot size measuring unit and iris diaphgram, the spot size measuring unit and iris diaphgram are respectively connected to centre
Manage device.
Further, the nonmonochromatic source includes monochromatic source array and splicer, the multi-wavelength probe unit packet
The rotating filtering piece set gradually along light path and a detector are included, the detector is multi-wavelength detector.
The utility model also provides a kind of measurement method of water body multi-wavelength optical attenuation coefficient measuring device, including following
Step：
S1:Nonmonochromatic source sends out the light beam for including multiple wavelength, and multi-wavelength probe unit measures each wavelength respectively
The initial parameter information of hot spot, the initial parameter information are initial irradiance value or initial single pulse energy magnitude or prompt radiation work(
Rate value or initial signal intensity value；
S2:Mobile mechanism drives multi-wavelength probe unit to move a distance along light path, measures each wavelength respective distances
Irradiance value or single pulse energy magnitude or radiation power value or signal strength values, and the measurement data is uploaded to central processing
Device；
S3：It repeats step S2 several times, no less than three groups of distances and irradiance value or energy value is obtained for each wavelength
Or the measurement data of radiation power value or signal strength values；
S4：Central processing unit is fitted for the measurement data of each wavelength, obtains the corresponding water body of each wavelength
Optical attenuation coefficient value.
Further, communication process of the light beam of each wavelength in water body meets following equation：
Pl=P0e-αl；
Ml=M0e-αl；
Sl=S0e-αl；
Communication process of the pulsed light beam in water body also meets：El=E0e-αl；
Wherein P0For the prompt radiation performance number of light beam, l is distance, PlFor corresponding spoke after light beam in water propagation distance l
Performance number is penetrated, α is attenuation coefficient；M0For the initial irradiance value of light beam, MlFor corresponding spoke after light beam in water propagation distance l
Brightness value；S0For the initial signal intensity value of light beam, SlLight beam corresponding signal strength values after propagation distance l in water；E0For light
The initial single pulse energy magnitude of beam, ElLight beam corresponding single pulse energy magnitude after propagation distance l in water.
Water body multi-wavelength optical attenuation coefficient measuring device provided by the utility model, including nonmonochromatic source, multi-wavelength
Probe unit, the mobile mechanism for connecting and driving the multi-wavelength probe unit to move along light path with the multi-wavelength probe unit
And the central processing unit being connect with the multi-wavelength probe unit, the multi-wavelength probe unit include at least one detection
Device, the size of the test surface of the detector are more than the size of the hot spot of required detection.Nonmonochromatic source is sent out including multiple waves
Long light beam measures the initial irradiance value of the light beam of each wavelength or initial single pulse energy magnitude by multi-wavelength probe unit
Or prompt radiation performance number or initial signal intensity value, then drive multi-wavelength probe unit to be moved along light path by mobile mechanism
It is dynamic, for the corresponding irradiance value of each wavelength measurement different distance or single pulse energy magnitude or radiation power value or initial signal
The corresponding multigroup measurement data of each wavelength is fitted, respectively obtains the optics of the corresponding water body of each wavelength by intensity value
Attenuation factor value.Multi-wavelength optical attenuation coefficient measuring device provided by the utility model can be imaged for wide spectrum and provide mostly light
It composes attenuation coefficient to measure, is suitable for the imaging system of different-waveband, strong environmental adaptability.
Description of the drawings
Fig. 1 is that a concrete structure is illustrated in the utility model water body multi-wavelength optical attenuation coefficient measuring device embodiment 1
Figure；
Fig. 2 is that a concrete structure is illustrated in the utility model water body multi-wavelength optical attenuation coefficient measuring device embodiment 2
Figure；
Fig. 3 is that a concrete structure is illustrated in the utility model water body multi-wavelength optical attenuation coefficient measuring device embodiment 3
Figure.
As shown in the figure：10, nonmonochromatic source；110, monochromatic source；20, multi-wavelength probe unit；210, detector；30,
Mobile mechanism；40, central processing unit；50, rotating filtering piece；60, iris diaphgram；710, optical splitter；720, planar array detector；
80, splicer.
Specific implementation mode
The utility model is described in detail below in conjunction with the accompanying drawings.
Embodiment 1
As shown in Figure 1, the utility model provides a kind of water body multi-wavelength optical attenuation coefficient measuring device, including non-list
Color light source 10, multi-wavelength probe unit 20 connect with the multi-wavelength probe unit 20 and drive the multi-wavelength probe unit
20 mobile mechanisms 30 moved along light path and the central processing unit 40 being connect with the multi-wavelength probe unit 20, more waves
Long probe unit 20 includes at least one detector 210, and the size of the test surface of the detector 210 is more than the light of required detection
The size of spot.Preferably, the nonmonochromatic source 10 is broad spectrum light source, and the broad spectrum light source rear is equipped with rotating filtering piece
50, the multi-wavelength probe unit includes a multi-wavelength detector.Specifically, the broad spectrum light source is sent out including multiple wavelength
Light beam, only there are one the detector 210 that can detect multiple wavelength, i.e. multi-wavelength detector in multi-wavelength probe unit 20,
The multi-wavelength detector can be color cmos camera or colorful CCD camera, can also use other that can obtain spectrum simultaneously
The instrument of information and intensity information, due to detecting the light beam just for a wavelength every time, it is therefore desirable to use rotating filtering
Piece 50 filters, and includes a variety of optical filters for being arranged in order on rotating filtering piece 50, each optical filter only allows wavelength
Light beam passes through, and sets rotating filtering piece 50 and rotate by a certain angle at regular intervals, ensures the detection of the light beam of each wavelength
Time, multi-wavelength detector are respectively processed for the measurement data of each wavelength, obtain the corresponding water body of each wavelength
Optical attenuation coefficient.The broad spectrum light source can be continuous light source or light-pulse generator, and broad spectrum light source need to use high collimation
Light source, collimation reach mrad magnitudes, as possible close to directional light, in case propagating facula area after certain distance is more than detector
210 test surface causes detection inaccurate.
Preferably, the front of the multi-wavelength detector is equipped with iris diaphgram 60.If specifically, the spy of multi-wavelength detector
The size in survey face is more than the size of hot spot, then readily receives other scattering light and therefore set in front of multi-wavelength detector
Set iris diaphgram 60, the light hole of iris diaphgram 60 is set as maximum by when detection first, is passed through planar array detector and is measured hot spot
Size, the light hole for then making iris diaphgram 60 is consistent with the size of hot spot, and hot spot is remeasured by multi-wavelength detector
Signal strength.It should be noted that the front in text refers to along the front of light path, rear refers to along the rear of light path.
The utility model also provides a kind of measurement method of above-mentioned water body multi-wavelength optical attenuation coefficient measuring device, packet
Include following steps：
S1:Nonmonochromatic source 10 sends out the light beam for including multiple wavelength, and multi-wavelength probe unit 20 measures each wave respectively
The initial parameter information of long hot spot, the initial parameter information are initial irradiance value or initial single pulse energy magnitude or initial spoke
Penetrate performance number or initial signal intensity value；Specifically, when nonmonochromatic source 10 is continuous light source, its initial irradiation can be measured
Angle value or prompt radiation performance number or initial signal intensity value, when nonmonochromatic source 10 is light-pulse generator, at the beginning of it being measured
Beginning irradiance value or initial single pulse energy magnitude or prompt radiation performance number or initial signal intensity value, irradiance value may be used
Illumination photometer measures, and radiation power value may be used power meter and measure, and single point detector may be used in signal strength values
Or planar array detector measures.Nonmonochromatic source 10 is broad spectrum light source in the present embodiment, sends out the light for including multiple wavelength
Beam, broad spectrum light source rear are filtered equipped with rotating filtering piece 50, only allow the light of a wavelength to pass through every time, multi-wavelength detection
Unit 20 includes a multi-wavelength detector, and such as color cmos camera or colorful CCD camera, interval detects the signal of each wavelength
Intensity, and when being measured using color cmos camera or colorful CCD camera, obtain the square of the signal strength of a Two dimensional Distribution
Battle array carries out it integral and can be obtained final signal strength values.
S2:Mobile mechanism 30 drives multi-wavelength probe unit 20 to move a distance along light path, measures each wavelength and corresponds to
The irradiance value or single pulse energy magnitude or radiation power value or signal strength values of distance, and the measurement data is uploaded to center
Processor 40；Specifically, the test surface in order to avoid detector 210 is more than the size of hot spot, to receive other scatterings
Light and when influencing detection accuracy, the size of hot spot can be measured first before detection, then change the light hole of iris diaphgram 60,
To make detector 20 that can only detect the corresponding parameter information of hot spot, improving detection accuracy will can be changed first in the present embodiment
The light hole of diaphragm 60 is set as maximum, and the size of hot spot is measured by color cmos camera or colorful CCD camera, then makes can be changed
The light hole of diaphragm 60 is consistent with the size of hot spot, and the signal strength of hot spot is remeasured by multi-wavelength detector.
S3：It repeats step S2 several times, no less than three groups of distances and irradiance value or energy value is obtained for each wavelength
Or the measurement data of radiation power value or signal strength values；Specifically, in mobile detector 20, can equidistantly move or
Non- equidistant movement, and in order to more accurately be fitted the optical attenuation coefficient of water-outlet body, measurement data can be increased, such as every
A wavelength obtains 6 groups and the corresponding measurement data of different distances above.
S4：Central processing unit 40 is fitted for the measurement data of each wavelength, obtains the corresponding water body of each wavelength
Optical attenuation coefficient value.Specifically, communication process of the light beam of each wavelength in water body meets following equation：
Pl=P0e-αl；
Ml=M0e-αl；
Sl=S0e-αl；
Communication process of the pulsed light beam in water body also meets：El=E0e-αl；
Wherein P0For the prompt radiation performance number of light beam, l is distance, PlFor corresponding spoke after light beam in water propagation distance l
Performance number is penetrated, α is attenuation coefficient；M0For the initial irradiance value of light beam, MlFor corresponding spoke after light beam in water propagation distance l
Brightness value；S0For the initial signal intensity value of light beam, SlLight beam corresponding signal strength values after propagation distance l in water；E0For light
The initial single pulse energy magnitude of beam, ElLight beam corresponding single pulse energy magnitude after propagation distance l in water.Therefore above-mentioned is selected
One parameter information of meaning, by measuring initial parameter information and the corresponding parameter information of at least three different distances, to obtain
Then measured value is carried out the fitting of exponential function, you can obtain current water body by the vector of the vector sum distance of one probe value
Attenuation factor value.
Embodiment 2
As shown in Fig. 2, as different from Example 1, nonmonochromatic source 10 described in the present embodiment is monochromatic source array,
I.e. by the array of 110 arrangement form of monochromatic source of multiple and different wavelength, the multi-wavelength probe unit 20 includes and the list
The array of 110 one-to-one detector 210 of monochromatic source composition in color light source array, i.e., each detector 210 detect one
The parameter information for the light beam that a monochromatic source 110 is sent out, it is preferred that the detector 210 is illumination photometer or power meter or energy
Meter or single point detector or planar array detector, when monochromatic source 110 is continuous light source, corresponding detector 210 can be shone
Degree meter or power meter or single point detector or planar array detector detect the irradiation level or radiant power or signal of the hot spot that it sends out
Intensity；When monochromatic source 110 is light-pulse generator, energy meter can also be used, the single pulse that it sends out is detected and corresponds to difference
The energy value of distance, and measurement data is fitted, measurement method obtains the optical attenuation coefficient of water body with embodiment 1.For
Simplified graphic structure, conceals mobile mechanism 30 and central processing unit 40 convenient for checking, in Fig. 2.
Please emphasis with reference to Fig. 2, when the detector 210 is illumination photometer or power meter or energy meter, each detection
The front of device is equipped with spot size measuring unit and iris diaphgram 60, the spot size measuring unit and iris diaphgram 60 successively
It is respectively connected to central processing unit 40.The spot-size detection unit include be located at light path on optical splitter 710 and with light splitting
The corresponding planar array detector of device 720.If the size of the test surface of detector 210 is more than the size of hot spot, it is readily received
Therefore his scattering light before the detection of detector 210, is first visited the size of hot spot by spot-size detection unit
It surveys, i.e., light beam is separated by optical splitter 710 and projected on planar array detector 720, light is detected by planar array detector 720
The size of spot, and the data of measurement are uploaded to central processing unit 40, control the size of the light hole and hot spot of iris diaphgram 60
Unanimously, to make detector 210 that can only detect the corresponding parameter information of hot spot, optical splitter 710 should be removed light path at this time, with
The detection accuracy for exempting from influence detector 210, further increases measurement result accuracy.Spot-size detection unit and can darkening
Door screen 60 is connect with mobile mechanism 30, drives both to be moved synchronously with detector 210 by mobile mechanism 30.
When detector 210 is planar array detector, then iris diaphgram 60 is set in front of planar array detector, and detection method is same
Embodiment 1 is arranged in front of light path in single point detector when detector 210 is single point detector and receives electro-optical device, the receipts light
The size that the bore of device is more than hot spot is detected for collecting whole hot spots convenient for single point detector.
Embodiment 3
As shown in figure 3, as different from Example 1, in the present embodiment, the nonmonochromatic source 10 includes monochromatic source battle array
Row and splicer 80, i.e., by the array of 110 arrangement form of monochromatic source of multiple and different wavelength, the multi-wavelength probe unit 20
Include the rotating filtering piece 50 set gradually along light path and a detector 210, the detector is multi-wavelength detector, this is more
Wavelength detector can be color cmos camera or colorful CCD camera, can also use other that can obtain spectral information simultaneously
With the instrument of intensity information.In the present embodiment, splicer 80 includes multiple speculums and a transflection mirror, as shown in figure 3, originally
In embodiment, monochromatic source array includes 4 monochromatic sources, the then light sent out by three speculums and a transflection mirror
Line synthesis is a branch of, due to there are one detectors 210, is filtered by rotating filtering piece 50, on rotating filtering piece 50
It including a variety of optical filters, only allows the light beam of a wavelength to pass through every time, and sets rotating filtering piece 50 and rotate at regular intervals
Certain angle ensures that the detection time of the light beam of each wavelength, multi-wavelength detector are distinguished for the measurement data of each wavelength
It is handled, obtains the optical attenuation coefficient of the corresponding water body of each wavelength.
In conclusion water body multi-wavelength optical attenuation coefficient measuring device provided by the utility model, including nonmonochromatic light
Source 10, multi-wavelength probe unit 20 connect with the multi-wavelength probe unit 20 and drive 20 edge of multi-wavelength probe unit
The mobile mechanism 30 of light path movement and the central processing unit 40 being connect with the multi-wavelength probe unit 20, the multi-wavelength are visited
It includes at least one detector 210 to survey unit 20, and the size of the test surface of the detector 210 is more than the hot spot of required detection
Size.Nonmonochromatic source 10 sends out the light beam for including multiple wavelength, and the light of each wavelength is measured by multi-wavelength probe unit 20
The initial irradiance value of beam or initial single pulse energy magnitude or prompt radiation performance number or initial signal intensity value, then pass through shifting
Motivation structure 30 drives multi-wavelength probe unit 20 to be moved along light path, for the corresponding irradiance value of each wavelength measurement different distance
Or single pulse energy magnitude or radiation power value or initial signal intensity value, the corresponding multigroup measurement data of each wavelength is intended
It closes, respectively obtains the optical attenuation coefficient value of the corresponding water body of each wavelength.Multi-wavelength optical decaying provided by the utility model
Coefficient measuring device can be imaged for wide spectrum provides multispectral attenuation coefficient measurement, is suitable for the imaging system of different-waveband,
Strong environmental adaptability.In addition, the utility model is simple in structure, of low cost, easy to use, effect is reliable, and accuracy is high.
Although the embodiment of the utility model is illustrated in specification, these embodiments are intended only as carrying
Show, should not limit the scope of protection of the utility model.Various omissions are carried out in the range of not departing from the utility model aims, are set
It changes and change should be included in the scope of protection of the utility model.
Claims (8)
1. a kind of water body multi-wavelength optical attenuation coefficient measuring device, which is characterized in that detected including nonmonochromatic source, multi-wavelength
Unit, the mobile mechanism for connecting and driving the multi-wavelength probe unit to move along light path with the multi-wavelength probe unit and
The central processing unit being connect with the multi-wavelength probe unit, the multi-wavelength probe unit include at least one detector, institute
State the test surface of detector size be more than required detection hot spot size.
2. water body multi-wavelength optical attenuation coefficient measuring device according to claim 1, which is characterized in that the polyenergetic
Light source is broad spectrum light source, and the broad spectrum light source rear is equipped with rotating filtering piece, and the multi-wavelength probe unit includes one
Multi-wavelength detector.
3. water body multi-wavelength optical attenuation coefficient measuring device according to claim 2, which is characterized in that the multi-wavelength
Detector is color cmos camera or colorful CCD camera.
4. water body multi-wavelength optical attenuation coefficient measuring device according to claim 3, which is characterized in that the multi-wavelength
The front of detector is equipped with iris diaphgram.
5. water body multi-wavelength optical attenuation coefficient measuring device according to claim 1, which is characterized in that the polyenergetic
Light source is monochromatic source array, and the multi-wavelength probe unit includes a pair of with the monochromatic source one in the monochromatic source array
The array for the detector composition answered.
6. water body multi-wavelength optical attenuation coefficient measuring device according to claim 5, which is characterized in that the detector
For illumination photometer or power meter or energy meter or single point detector or planar array detector.
7. water body multi-wavelength optical attenuation coefficient measuring device according to claim 5, which is characterized in that the detector
Front for illumination photometer or power meter or energy meter, each detector is equipped with spot size measuring unit and can darkening successively
Door screen, the spot size measuring unit and iris diaphgram are respectively connected to central processing unit.
8. water body multi-wavelength optical attenuation coefficient measuring device according to claim 1, which is characterized in that the polyenergetic
Light source includes monochromatic source array and splicer, and the multi-wavelength probe unit includes the rotating filtering piece set gradually along light path
With a detector, the detector is multi-wavelength detector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820400355.3U CN208076382U (en) | 2018-03-23 | 2018-03-23 | Water body multi-wavelength optical attenuation coefficient measuring device |
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| CN201820400355.3U CN208076382U (en) | 2018-03-23 | 2018-03-23 | Water body multi-wavelength optical attenuation coefficient measuring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414464A (en) * | 2018-03-23 | 2018-08-17 | 苏州蛟视智能科技有限公司 | Water body multi-wavelength optical attenuation coefficient measuring device and method |
| CN111272711A (en) * | 2020-02-26 | 2020-06-12 | 中国海洋大学 | Water attenuation coefficient in-situ measuring device |
| CN113466137A (en) * | 2021-06-23 | 2021-10-01 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Reflection mobile water body optical attenuation coefficient measuring device and method |
-
2018
- 2018-03-23 CN CN201820400355.3U patent/CN208076382U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414464A (en) * | 2018-03-23 | 2018-08-17 | 苏州蛟视智能科技有限公司 | Water body multi-wavelength optical attenuation coefficient measuring device and method |
| CN111272711A (en) * | 2020-02-26 | 2020-06-12 | 中国海洋大学 | Water attenuation coefficient in-situ measuring device |
| CN113466137A (en) * | 2021-06-23 | 2021-10-01 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Reflection mobile water body optical attenuation coefficient measuring device and method |
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