CN110274894A - A kind of photoelectricity transparency meter - Google Patents
A kind of photoelectricity transparency meter Download PDFInfo
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- CN110274894A CN110274894A CN201910700714.6A CN201910700714A CN110274894A CN 110274894 A CN110274894 A CN 110274894A CN 201910700714 A CN201910700714 A CN 201910700714A CN 110274894 A CN110274894 A CN 110274894A
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- 230000005622 photoelectricity Effects 0.000 title claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 230000005855 radiation Effects 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 230000004044 response Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 17
- 241000669003 Aspidiotus destructor Species 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000009304 pastoral farming Methods 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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Abstract
The invention belongs to ocean observation technology field, in particular to a kind of photoelectricity transparency meter.Including photoelectric conversion disk, balance control mechanism, bottom pendant and support frame, wherein the lower end Yu bottom of support frame fall connection, upper end is connect with circumferentially distributed multiple photoelectric conversion disks, multiple photoelectric conversion disk rings are around in the outside of balance control mechanism and connect with balance control mechanism, and photoelectric conversion disk is used to measure the downward spoke brightness and record time of measuring of underwater light field.The present invention acquires underwater light field signal strength and its variation, can keep away the influence measured with human eye difference water transparency except bias light variation, obtain more accurate water transparency data, can effectively keep away except instrument tether cable shade and device inclined influence problem.
Description
Technical field
The invention belongs to ocean observation technology field, in particular to a kind of photoelectricity transparency meter.
Background technique
Water transparency is for waters Primary Production force estimation, water quality and oceanic optical remote sensing calibration etc.
Important measurement parameters.The depth of water body can be penetrated since water transparency characterizes natural light, to influence underwater plant
Photosynthesis, and then determine the living environment of animals and plants in waters.
The measurement method of water transparency at present is put into water body using cheap transparent scale, until human eye
Just depth existing for transparent scale can be recognized, estimate the transparence value of water body with this, this measurement method because of human eye and
The difference of Natural light intensity and generate uncertain.Therefore, human eye is replaced using the electrooptical device after calibration, can quantitatively obtained
The transparence value of water body.However, having the characteristics that fuzzy diagnosis, eye-observation due to the transparent scale transferred in eye-observation water
Transparent scale is not present transparent scale tether cable shade and transparent scale obliquity effects problem, and existing photoelectric detection equipment,
During equipment transfers the amount of radiation of measurement underwater light field, the inclination of shade and equipment, makes caused by rotating because of tether cable
Water transparency measurement inaccuracy.Therefore, being badly in need of one kind can keep away except tether cable shade or light passing sectional area variation bring shadow
Loud photoelectric detection equipment.
Summary of the invention
For the problem of existing transparent scale measurement inaccuracy, the purpose of the present invention is to provide a kind of photoelectricity transparencies
Instrument can accurately obtain water transparency, solve existing photoelectric detection equipment because of shade and equipment caused by tether cable rotation
Inclination causes the problem of water transparency measurement inaccuracy.
To achieve the above object, the invention adopts the following technical scheme:
A kind of photoelectricity transparency meter, including photoelectric conversion disk, balance control mechanism, bottom pendant and support frame, wherein support frame
Lower end and bottom pendant connect, upper end connect with circumferentially distributed multiple photoelectric conversion disks, and multiple photoelectric conversion disk rings are around in flat
Weigh adjustment mechanism outside and connect with the balance control mechanism, the photoelectric conversion disk be used for measure underwater light field
Downward spoke brightness and record time of measuring.
The photoelectric conversion disk includes sealing shell, power supply and control circuit, aspherical convex lens, ccd array, pressure biography
Sensor and data acquisition circuit, wherein power supply and control circuit, ccd array, pressure sensor and data acquisition circuit are set to
In sealing shell and ccd array is set to the top of power supply and control circuit, data acquisition circuit and pressure sensor, described
Aspherical convex lens is set to the top of sealing shell, and the downward radiation amount of underwater light field is after aspherical convex lens, at CCD gusts
Electric signal is converted on column, while data acquisition circuit acquires the electric signal, also acquires the depth of water number of pressure sensor output
Value, the power supply and control circuit are for recording sampling time, depth and downward spoke intensity of brightness.
The material density of the aspherical convex lens is greater than conventional water body density, realizes that optically thinner medium is refracted into close Jie of light
The process of matter, and the diffusing scattering photon transmitted downward or upward in water body can be made all to be not parallel to aspheric in any direction
The paraboloid of face convex lens.
The photosurface of the ccd array is less than the planar section of aspherical convex lens.
The frequency acquisition of the time response frequency and data acquisition circuit of the ccd array and pressure sensor is all larger than
1Hz。
The balance control mechanism includes clump weight, balance adjustment strut and fixed column, and wherein fixed column passes through multiple flat
Weighing apparatus adjusts strut and connect respectively with multiple photoelectric conversion disks, is threaded with a clump weight on each balance adjustment strut, passes through
Realize that the degree of balance of photoelectric conversion disk is adjusted in the position for adjusting clump weight.
The posture information and the posture of corresponding time sensing for recording the photoelectric conversion disk are equipped in the fixed column
Device.
Support frame as described above includes that main support rod and multiple side struts, the wherein lower end of main support rod and the bottom pendant connect,
Upper end is equipped with o-ring, and multiple side struts are connect in emitting shape with o-ring, and multiple photoelectric conversion disks are respectively arranged at multiple
The end of side strut.
Water sail is connected on the main support rod.
The quantity of the photoelectric conversion disk is three or three or more.
The invention has the following beneficial effects and advantage:
1. photoelectricity transparency meter through the invention acquires underwater light field signal strength and its variation, can keep away except background
Light variation and the influence that measures water transparency of human eye difference, obtain more accurate water transparency data, and existing
Lightness measuring instrument is compared, and can effectively be kept away except instrument tether cable shade and device inclined influence problem.
2. the present invention is by integrating attitude transducer in the center fixed column of photoelectricity transparency meter, it can be achieved that vertical logical
Optical cross-section is corrected.The installation of photoelectric conversion disk is rigid link to be carried out using strut, therefore make in photoelectricity transparency meter
With in the process, the posture of center fixed column is the posture of each photoelectric conversion disk, and synchronous recording photoelectricity is transparent in use process
The posture for spending instrument, can carry out the calculating in effective light passing section.
3. the present invention is by the synchro measure of three or three or more photoelectric conversion disks, it can be achieved that different installed position light
Mutual calibration between electric changeover panel.Tether cable rotation causes its shade on different photoelectric conversion disks in equipment decentralization process
Variation can be right using amount of radiation variation at relative position using three or three or more photoelectric conversion disk synchro measures
Radiant quantity measurement deviation caused by shade is calibrated.
4. the optical window of photoelectric conversion disk involved in the present invention is all made of aspherical convex lens, it can be achieved that underwater diffusing scattering
Effective reception of light.Since water body is natural optical diffuser, skylight can generate Multiple Scattering after entering water body, aspherical
Convex lens can be avoided the influence of grazing incidence effect.
5. photoelectricity transparency meter of the invention has the advantages that measurement accuracy height and the interference of anti-background environment, especially suitable
In the measurement situation of background natural light variation.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the structural schematic diagram of photoelectric conversion disk in the present invention.
In figure: 1 is aspherical convex lens, and 2 be ccd array, and 3 be pressure sensor, and 4 be data acquisition circuit, and 5 be power supply
And control circuit, 6 be sealing shell, and 7 be photoelectric conversion disk, and 8 be clump weight, and 9 be balance adjustment strut, and 10 be fixed column, 11
It is water sail for o-ring, 12,13 fall the bottom of for, and 14 be side strut, and 15 be main support rod.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, right in the following with reference to the drawings and specific embodiments
The present invention is described in detail.
As shown in Figure 1, a kind of photoelectricity transparency meter provided by the invention, including photoelectric conversion disk 7, balance control mechanism,
Bottom pendant 13 and support frame, wherein the lower end bottom of with the pendant 13 of support frame is connect, upper end and circumferentially distributed multiple photoelectric conversion disks 7
Connection, multiple photoelectric conversion disks 7 are surrounded on the outside of balance control mechanism and connect with balance control mechanism, photoelectric conversion
Disk 7 is used to measure the downward spoke brightness and record time of measuring of underwater light field.
Support frame includes main support rod 15 and multiple side struts 14, and wherein the lower end bottom of with the pendant 13 of main support rod 15 is connect,
Upper end is equipped with o-ring 11, and multiple side struts 14 are connect in emitting shape with o-ring 11, and multiple photoelectric conversion disks 7 are respectively arranged at more
The end of a side strut 14.Water sail 12 is connected on main support rod 15.
The quantity of photoelectric conversion disk 7 is three or three or more, in the embodiment of the present invention, the quantity of photoelectric conversion disk 7
It is three.
As shown in Fig. 2, balance control mechanism includes clump weight 8, balance adjustment strut 9 and fixed column 10, wherein fixed column
10 are connect with multiple photoelectric conversion disks 7 respectively by multiple balance adjustment struts 9, are threadedly coupled on each balance adjustment strut 9
There is a clump weight 8, the position by adjusting clump weight 8 realizes that the degree of balance of photoelectric conversion disk 7 is adjusted.
Further, the posture information and the posture of corresponding time for recording photoelectricity changeover panel 7 are equipped in fixed column 10
Sensor.
As shown in figure 3, photoelectric conversion disk 7 includes sealing shell 6, power supply and control circuit 5, aspherical convex lens 1, CCD
Array 2, pressure sensor 3 and data acquisition circuit 4, wherein power supply and control circuit 5, ccd array 2, pressure sensor 3 and number
Be set in sealing shell 6 according to Acquisition Circuit 4 and ccd array 2 be set to power supply and control circuit 5, data acquisition circuit 4 and
The top of pressure sensor 3, aspherical convex lens 1 are set to the top of sealing shell 6.The downward radiation amount of underwater light field is through non-
After spherical convex lens 1, electric signal is converted on ccd array 2 and is also acquired while data acquisition circuit 4 acquires the electric signal
The depth of water numerical value that pressure sensor 3 exports, power supply and control circuit 5 are strong for recording sampling time, depth and downward spoke brightness
Degree.
The frequency acquisition of the time response frequency and data acquisition circuit 4 of ccd array 2 and pressure sensor 3 is all larger than
1Hz。
Balance adjustment strut 9 and fixed column 10 are all made of anti-corrosion material, are between balance adjustment strut 9 after installation
Long, equiangularly spaced, hawser is tethered in fixed column 10, and the measurement for carrying out photoelectricity transparency meter uses.Fixed column 10 is using anti-
Seawater encapsulation, by presetting, in photoelectricity transparency meter in use, recording its posture information by the attitude transducer in it
With the corresponding time, and its measure posture information can carry out direct-reading by computer.
In the embodiment of the present invention, clump weight 8 and balance adjustment strut 9 all use 6H grades of accuracy of thread, and counterweight
Block 8 is equipped with jackscrew, in order to relative position of the fixed pouring weight 8 on balance adjustment strut 9.It completes photoelectric conversion disk 7, putting down
After weighing apparatus adjusts the installation between strut 9, fixed column 10 and o-ring 11, then the adjusting of 8 position of pouring weight is carried out, cooperated in fixed column 10
The measurement of attitude transducer compares, and makes all photoelectric conversion disks 7 in same level as far as possible.
In photoelectric conversion disk 7 and fixed column 10 sampling time of attitude transducer and interval unanimously, underwater light field it is downward
Amount of radiation is converted to electric signal after aspherical convex lens 1 on ccd array 2, and data acquisition circuit 4 acquires the electric signal
Meanwhile the depth of water numerical value that also acquisition pressure sensor 3 exports, finally, sampling time, depth and downward spoke intensity of brightness are recorded in
In power supply and control circuit 5.
The material density of aspherical convex lens 1 is greater than conventional water body density, realizes that optically thinner medium is refracted into optically denser medium
Process, and it is aspherical that the diffusing scattering photon transmitted downward or upward in water body can be made all to be not parallel in any direction
The paraboloid of convex lens 1, face type should meet:
Wherein, e is eccentricity, αiFor the non-curved coefficient of high order, x is radial coordinate, and ρ is the curvature on lens curved surface vertex.
The photosurface of ccd array 2 is less than the planar section of aspherical convex lens 1, to guarantee via aspherical convex lens 1
Luminous energy after refraction covers CCD, leaves unused pixel without CCD.The time response of ccd array 2 and pressure sensor 3 frequency
The frequency acquisition of rate and data acquisition circuit 4 is all larger than 1Hz.
In the downward spoke brightness measurement of progress underwater light field, the quantity of installation photoelectric conversion disk 7 is three or three or more,
Compare and correct by spoke brightness number, eliminating tether cable, there are the influences of shade in photoelectric conversion disk 7.By powering and controlling
It is consistent with the working time that all 7 clock alignments of photoelectric conversion disk are arranged in circuit 5 processed.Before use, photoelectric conversion disk 7 to natural light
Spectrally the conversion of light intensity carries out unified calibration calibration, and for same light field, the spoke brightness that photoelectric conversion disk 7 measures is consistent.
In this embodiment, using photoelectricity transparency meter, underwater light field signal strength and its variation are measured, can be kept away except back
The influence that the variation of scape light and human eye difference measure water transparency, obtains and more accurately calculates water transparency data.Pass through
The synchro measures of three or three or more photoelectric conversion disks is, it can be achieved that mutual school between different installed position photoelectric conversion disks
It is quasi-.Tether cable rotation causes its shade to change on different photoelectric conversion disks 7 in equipment decentralization process, using three or three
A above 7 synchro measure of photoelectric conversion disk, can be using amount of radiation variation at relative position, to amount of radiation caused by shade
Measured deviation is calibrated.Compared with existing transparency measuring instrument, it can effectively keep away except instrument tether cable shade and set
Standby obliquity effects problem.The installation of photoelectric conversion disk is rigid link to be carried out using strut, therefore make in photoelectricity transparency meter
With in the process, the posture of center fixed column is the posture of each photoelectric conversion disk, and synchronous recording photoelectricity is transparent in use process
The posture for spending instrument, can carry out the calculating in effective light passing section, to improve the precision of water transparency measurement.
Photoelectricity transparency meter provided by the invention avoids the yin using instrument inclination and tether cable when photoelectricity transparency meter
Shadow influences, and receives wide-angle optical signal by aspherical convex lens, realizes photoelectric conversion, the survey of pressure sensor by ccd array
Accuracy of measurement is higher than 0.1 meter.The present invention converts underwater light field signal using CCD photosensitive element, obtain underwater light field in
Lower spoke brightness realizes water transparency and by the mutual corrections of three or three or more photoelectric conversion disks with the variation of depth
It calculates, improves the accuracy of water transparency measurement.
Photoelectricity transparency meter of the invention has measurement efficiency height, anti-experimental situation is interfered, ensures the advantages that measurement accuracy,
To solve the uncertain problem of water transparency measurement.
Mode the above is only the implementation of the present invention is not intended to limit the scope of the present invention.It is all in the present invention
Spirit and principle within any modification, equivalent replacement, improvement, extension etc., be all contained in protection scope of the present invention
It is interior.
Claims (10)
1. a kind of photoelectricity transparency meter, which is characterized in that including photoelectric conversion disk (7), balance control mechanism, bottom pendant (13) and prop up
Support, wherein the lower end bottom of with the pendant (13) of support frame are connect, and upper end is connect with circumferentially distributed multiple photoelectric conversion disks (7),
Multiple photoelectric conversion disks (7) are surrounded on the outside of balance control mechanism and connect with the balance control mechanism, the photoelectricity
Changeover panel (7) is used to measure the downward spoke brightness and record time of measuring of underwater light field.
2. photoelectricity transparency meter according to claim 1, which is characterized in that the photoelectric conversion disk (7) includes that sealing is outer
Shell (6), power supply and control circuit (5), aspherical convex lens (1), ccd array (2), pressure sensor (3) and data acquisition electricity
Road (4), wherein power supply and control circuit (5), ccd array (2), pressure sensor (3) and data acquisition circuit (4) be set to it is close
In envelope shell (6) and ccd array (2) is set to power supply and control circuit (5), data acquisition circuit (4) and pressure sensor
(3) top, the aspherical convex lens (1) are set to the top of sealing shell (6), and the downward radiation amount of underwater light field is through non-
After spherical convex lens (1), electric signal is converted on ccd array (2), while data acquisition circuit (4) acquires the electric signal,
Also the depth of water numerical value of acquisition pressure sensor (3) output, the power supply and control circuit (5) are for recording sampling time, depth
With downward spoke intensity of brightness.
3. photoelectricity transparency meter according to claim 2, which is characterized in that the material of the aspherical convex lens (1) is close
Degree is greater than conventional water body density, realizes that optically thinner medium is refracted into the process of optically denser medium, and can make in water body downwards or
The diffusing scattering photon transmitted upwards is all not parallel to the paraboloid of aspherical convex lens (1) in any direction.
4. photoelectricity transparency meter according to claim 2, which is characterized in that the photosurface of the ccd array (2) is less than non-
The planar section of spherical convex lens (1).
5. photoelectricity transparency meter according to claim 2, which is characterized in that the ccd array (2) and pressure sensor
(3) frequency acquisition of time response frequency and data acquisition circuit (4) is all larger than 1Hz.
6. photoelectricity transparency meter according to claim 1, which is characterized in that the balance control mechanism includes clump weight
(8), balance adjustment strut (9) and fixed column (10), wherein fixed column (10) by multiple balance adjustment struts (9) respectively with it is more
A photoelectric conversion disk (7) connects, and is threaded with a clump weight (8) on each balance adjustment strut (9), passes through and adjusts clump weight
(8) realize that the degree of balance of photoelectric conversion disk (7) is adjusted in position.
7. photoelectricity transparency meter according to claim 6, which is characterized in that be equipped in the fixed column (10) for recording
The posture information and the attitude transducer of corresponding time of the photoelectric conversion disk (7).
8. photoelectricity transparency meter according to claim 1, which is characterized in that support frame as described above include main support rod (15) and
Multiple side struts (14), wherein the lower end of main support rod (15) falls (13) with the bottom and connect, and upper end is equipped with o-ring (11), more
A side strut (14) connect in emitting shape with o-ring (11), and multiple photoelectric conversion disks (7) are respectively arranged at multiple side struts
(14) end.
9. photoelectricity transparency meter according to claim 8, which is characterized in that be connected with water sail on the main support rod (15)
(12)。
10. -9 described in any item photoelectricity transparency meters according to claim 1, which is characterized in that the photoelectric conversion disk (7)
Quantity is three or three or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910700714.6A CN110274894B (en) | 2019-07-31 | 2019-07-31 | Photoelectric transparency instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910700714.6A CN110274894B (en) | 2019-07-31 | 2019-07-31 | Photoelectric transparency instrument |
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| Publication Number | Publication Date |
|---|---|
| CN110274894A true CN110274894A (en) | 2019-09-24 |
| CN110274894B CN110274894B (en) | 2024-01-30 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101170682A (en) * | 2007-11-12 | 2008-04-30 | 中国水产科学研究院黄海水产研究所 | Remote monitoring system for deep water mesh box |
| CN201393283Y (en) * | 2009-04-13 | 2010-01-27 | 陈泽堂 | Underwater camera monitoring system in high turbid water regions |
| CN203432680U (en) * | 2013-09-11 | 2014-02-12 | 中国科学院海洋研究所 | Device measuring optical vertical profile of water body without shadow influence |
| CN104251844A (en) * | 2014-09-19 | 2014-12-31 | 中国人民解放军理工大学 | Multi-channel seawater transparency measuring device and method |
| CN107356534A (en) * | 2017-09-01 | 2017-11-17 | 孙兆华 | Water body in-situ apparent spectral scope |
| CN210322789U (en) * | 2019-07-31 | 2020-04-14 | 中国科学院海洋研究所 | Photoelectric transparency meter |
-
2019
- 2019-07-31 CN CN201910700714.6A patent/CN110274894B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101170682A (en) * | 2007-11-12 | 2008-04-30 | 中国水产科学研究院黄海水产研究所 | Remote monitoring system for deep water mesh box |
| CN201393283Y (en) * | 2009-04-13 | 2010-01-27 | 陈泽堂 | Underwater camera monitoring system in high turbid water regions |
| CN203432680U (en) * | 2013-09-11 | 2014-02-12 | 中国科学院海洋研究所 | Device measuring optical vertical profile of water body without shadow influence |
| CN104251844A (en) * | 2014-09-19 | 2014-12-31 | 中国人民解放军理工大学 | Multi-channel seawater transparency measuring device and method |
| CN107356534A (en) * | 2017-09-01 | 2017-11-17 | 孙兆华 | Water body in-situ apparent spectral scope |
| CN210322789U (en) * | 2019-07-31 | 2020-04-14 | 中国科学院海洋研究所 | Photoelectric transparency meter |
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