CN105510250A - Water body light absorption and attenuation coefficients measurement method - Google Patents
Water body light absorption and attenuation coefficients measurement method Download PDFInfo
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Abstract
The invention provides a water body light absorption and attenuation coefficients measurement method. The method comprises the following steps: 1) light emitted by same light source is divided into three paths; 2) the following measurement can be carried out simultaneously; a first path of an optical signal is input to an absorption channel, passes through a water body to-be-measured to generate a first feedback light signal, the light signal is received for being as an absorption channel measure result; a second path of the optical signal is input to an attenuation channel, passes through the water body to-be-measured to generate a second feedback light signal, the light signal is received for being as an attenuation channel measure result; a third path of the optical signal is directly output to obtain a third feedback light signal, the light signal is received for being as a reference optical path measure result; and 3) according to the absorption channel measure result, the attenuation channel measure result and the reference optical path measure result, light absorption coefficients and attenuation coefficients of the water body can be obtained. According to the invention, in-situ measurement of an absorption spectrum of the water body can be carried out, operation is simple, error is little, and the method provides a good technical case for accurately measuring the attenuation coefficients and the absorption coefficients of the water body such as seawater.
Description
Technical field
The present invention relates to a kind of measuring method, be specifically related to a kind of method measuring the water body absorption coefficient of light and water body light attenuation coefficient.
Background technology
Water body optical absorption/attenuation coefficient characterizes water body to the absorption of light and attenuation, and only relevant with the material composition in water body, not relying on the geometry of water body light field, is two large inherent optics character of water body.Light is through medium, and a part is absorbed, and a part departs from the former direction of propagation and is scattered in addition; The acting in conjunction of absorption and scattering causes the decay of light.
The change of the absorption coefficient of light and light attenuation coefficient and water constituent have close contacting.Except pure water, the absorption coefficient of light derives from the absorption contribution of coloured dissolved organic matters (CDOM), phytoplankton (ph) and non-admissible solutions (NAP); Suspended particulate substance is the main source causing light scattering, determines the variation characteristic of light-decay characteristic together with the optical absorption characteristics of different component.
(a, unit is m to the absorption coefficient of light of water body
-1) being defined as a branch of directional light through an infinitely thin uniform dielectric, the ratio of absorptivity (A) and dielectric thickness (⊿ r), the available following formula of its definition represents:
a(λ)＝2.303×OD(λ)/r
Wherein, OD (λ) represents optical density (OD), and r represents light path.
Except pure water, water body absorption coefficient a (λ) simply can be divided into the contribution of the large class of coloured dissolved organic matters, suspended particulate substance etc. two, can be expressed as:
a(λ)＝a
w(λ)+a
p(λ)+a
CDOM(λ)，(1)
Right formula represents full sea water (w), total particulate (p) and coloured dissolved organic matters (CDOM) respectively to the contribution absorbed, wherein total particulate absorbs the absorption spectrum sum can decomposing again phytoplankton (ph), non-admissible solutions (NAP) further, namely
a
p(λ)＝a
ph(λ)+a
NAP(λ)
(b, unit is m to the light-scattering coefficient of water body
-1) be defined as a branch of directional light through an infinitely thin uniform dielectric, light scattering rate (B) and dielectric thickness (⊿ r) and ratio, that is:
(c, unit is m to the light attenuation coefficient of water body
-1) be the absorption and scattering coefficienth sum of water body, that is:
In c (λ)=a (λ)+b (λ) prior art, for the measurement of water body light absorption attenuation coefficient, usually use total reflection pipe or hypersorption pipe, need to carry out temperature, salt correction and scatter correction; Or use spectrophotometer.All there is measurement complicated operation, the problems such as influence factor is many, and error is large in these two kinds of methods.
Summary of the invention
A kind of water body light absorption is the object of the present invention is to provide to decay absorption measurement method, can in site measurement water body absorption spectrum, for the analysis of further water phytoplankton Grain grade structure provides reliable Data support.
To achieve these goals, the technical scheme that the present invention takes is:
A kind of water body light absorption attenuation coefficient measuring method, it comprises the following steps:
Step 1, the light sent by same light source are divided into three tunnels;
Step 2, carry out following measurement simultaneously:
First via light signal being inputed in absorbing path again by producing the first light signal fed back after water body to be measured, receiving this first light signal fed back as absorbing path measurement result;
Second road light signal being inputed in attenuation path again by producing the second light signal fed back after water body to be measured, receiving this second light signal fed back as attenuation path measurement result;
3rd road light signal is directly exported the 3rd light signal fed back, receives the 3rd light signal fed back as reference light path measurement result;
Step 3, obtain the water body absorption coefficient of light and water body light attenuation coefficient according to described absorbing path measurement result, attenuation path measurement result and reference path measurement result.
Described method is realized by water body light absorption attenuation coefficient measuring instrument, and described water body light absorption attenuation coefficient measuring instrument comprises luminescence unit, sampling unit, probe unit and signal processing and analysis unit, wherein:
The three road subchannels that described luminescence unit comprises main channel and is divided in the rear end of main channel, be interconnected between described main channel and subchannel, the light source assembly producing light signal is provided with in described main channel, the connectivity part of main channel and subchannel being provided with the beam splitter for described light signal being divided into three beams, after making light signal be divided into three beams, entering three road subchannels respectively; In three road subchannels, wherein the terminal of the first subchannel and the second subchannel has closed first window and Second Window;
Described probe unit comprises three road receiving cables, and wherein, the top of the first receiving cable and the second receiving cable has the 3rd closed window and the 4th window, and the 3rd receiving cable is connected with the second receiving cable;
Described sampling unit comprises for connecting first window and the first water sample passage of the 3rd window and the second water sample passage for being connected Second Window and the 4th window;
Described signal processing and analysis unit is provided with spectroanalysis instrument;
The terminal of the 3rd subchannel is connected by the terminal of optical fiber with the 3rd receiving cable, in the connectivity part of the 3rd receiving cable and the second receiving cable, one bundling device is installed, described bundling device is used for the light signal in the 3rd subchannel after the 3rd receiving cable, carry out conjunction point with the light signal in the second subchannel after the second receiving cable, and then being sent to the terminal of the second receiving cable, the light signal in described first subchannel is sent to the terminal of the first receiving cable; The terminal of described first receiving cable and the terminal of the second receiving cable are all connected with spectroanalysis instrument by optical fiber;
Described the first to three subchannel is absorbing path, attenuation path and reference channel, described the first to three receiving cable is respectively and absorbs receiving cable, decay receiving cable and reference receiving cable, and first to fourth window described is respectively the first absorbing window, the first decay window, the second absorbing window and the second decay window;
The inwall of described first water sample passage is coated with reflective coating, and the inwall of described second water sample passage is through blackening process.
In water body light absorption attenuation coefficient measuring instrument of the present invention, luminescence unit provides spectrum to enrich the light source of stable performance for water body parameter measurement; Sampling unit mainly realizes the sampling of water body example; Probe unit realizes the detection of optical radiation signal, carries the parameter information of water body in this signal; Signal processing and analysis unit can carry out spectral analysis to the information detected, and provides underlying parameter data for water body attenuation and absorption parameter calculates.
In the present invention's preferred water body light absorption attenuation coefficient measuring instrument, the inwall of described first water sample passage is coated with reflective coating, to make the first water sample vias inner walls, there is highly reflective, thus realize the measurement of absorption signal, the inwall of described second water sample passage makes the second water sample vias inner walls have high-absorbable through blackening process, thus realizes the measurement of deamplification.The first described water sample passage and the second water sample passage are detachable pipeline.
The rear end of described main channel extends to form attenuation path, described reference channel is directly communicated with attenuation path, described absorbing path is directly communicated with main channel, and described beam splitter comprises the first beam splitter of the connectivity part being arranged at absorbing path and main channel and is arranged at second beam splitter of connectivity part of reference channel and attenuation path.
Described first absorbing window, the first decay window, the second absorbing window and the second decay window are sustained height and direction, and they are all closed by sapphire; Described first absorbing path comprises and the vertical absorbing path that be communicated with and with the described vertical absorbing path vertical aligned adsorbent passage that be also communicated with vertical with main channel, installs a right-angle prism in the connectivity part of described vertical absorbing path and aligned adsorbent passage.
Described light source assembly comprises light source, concentrating component, damping assemblies, diaphragm component and the first shutter assembly that spatially order sets gradually from the front end of main channel to its rear end, be installed on an opening towards in the snoot of concentrating component at described light source, the light path between the first beam splitter and the first shutter assembly also installed a collimating mirror group.
In described luminescence unit, light source preferred high stable halogen tungsten lamp light source assembly; Described concentrating component is three gummed achromat assemblies preferably; The preferred high power aperture diaphragm assembly of described diaphragm component.
The first converging lenses group, the second converging lenses group and the 3rd converging lenses group is separately installed with in reference receiving cable in decay receiving cable in reference channel, between bundling device and the terminal of decay receiving cable and between the terminal of bundling device and reference receiving cable; Be provided with homogenizer and energy harvester in described absorption receiving cable, described homogenizer is positioned at the second absorbing window side.
In decay receiving cable between bundling device and the second decay window and the 3rd converging lenses group away from being separately installed with the second shutter assembly and the 3rd shutter assembly in the reference receiving cable of bundling device side; Described first shutter assembly, the second shutter assembly and the 3rd shutter assembly are electronic shutter, and by external controller, by controlling, cable is unified to be controlled the switch of described electronic shutter and light source.
Described step 1 comprises:
Light source in step 11, unlatching water body light absorption attenuation coefficient measuring instrument in luminescence unit main channel, the light signal that light source sends, through the adjustment of concentrating component, damping assemblies, diaphragm component, is transported to the first shutter assembly in main channel;
Step 12, open the first shutter assembly, make light signal be transferred to the first beam splitter and the second beam splitter, light signal is divided into three tunnels by the first beam splitter and the second beam splitter, enters absorbing path, attenuation path and reference channel respectively.
Described step 2 comprises:
The first water sample passage and the second water sample passage are introduced in the water sample import that water body to be measured is arranged from the first water sample passage and the second water sample passage respectively;
The first via light signal arriving the first absorbing window through absorbing path enters the first water sample passage from the first absorbing window, through water body to be measured, enter absorption receiving cable through the second absorbing window, then be passed to spectroanalysis instrument through optical fiber after optically focused process, measured as the first light signal fed back;
The the second road light signal arriving the first decay window through attenuation path enters the second water sample passage from the first decay window, through water body to be measured, enter decay receiving cable through the second decay window, then be passed to spectroanalysis instrument through optical fiber after optically focused process, measured as the second light signal fed back;
The 3rd road light signal entering reference channel is delivered to reference to receiving cable by optical fiber after the first converging lenses group carries out optically focused process, then is passed to spectroanalysis instrument through optical fiber, measured as the 3rd feedback signal.
Described water body to be measured is any one in seawater, lake water and river.
Method of the present invention, particularly use the measuring method that equipment provided by the invention is implemented, can in site measurement water body absorption spectrum, simple to operate, error is little, for the Measurement accuracy realizing the water body light attenuation coefficients such as seawater and the water body absorption coefficient of light provides good technical foundation, also for the analysis of further water phytoplankton Grain grade structure provides reliable Data support.
Accompanying drawing explanation
Fig. 1 is the overall light channel structure schematic diagram of the embodiment of the present invention 1 water body light absorption attenuation coefficient measuring instrument.
Fig. 2 is the luminescence unit light channel structure schematic diagram of the embodiment of the present invention 1 water body light absorption attenuation coefficient measuring instrument.
Fig. 3 is the probe unit light channel structure schematic diagram of the embodiment of the present invention 1 water body light absorption attenuation coefficient measuring instrument.
Reference numeral:
1, luminescence unit; 11, main channel; 111, snoot; 112, light source; 113, concentrating component; 114, damping assemblies; 115, diaphragm component; 116, the first shutter assembly; 1171, the first beam splitter; 1172, the second beam splitter; 118, collimating mirror group; 12, absorbing path; 121, right-angle prism; 122, the first absorbing window; 13, attenuation path; 131, the first decay window; 14, reference channel;
2, sampling unit; 21, the first water sample passage; 22, the second water sample passage; 23, cable passage;
3, probe unit; 31, receiving cable is absorbed; 311, the second absorbing window; 312, homogenizer; 313, energy harvester; 32, decay receiving cable; 321, the second decay window; 322, the second shutter assembly; 323, bundling device; 33, with reference to receiving cable; 331, the 3rd shutter assembly;
4, signal processing and analysis unit; 5, optical fiber; 61, the first converging lenses group; 62, the second converging lenses group; 63, the 3rd converging lenses group.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.Set forth a lot of detail in the following description so that fully understand the present invention, those skilled in the art can when without prejudice to doing similar popularization when intension of the present invention, therefore the present invention is by the restriction of following public specific embodiment.
Embodiment 1
A kind of water body light absorption attenuation coefficient measuring instrument, as shown in Figure 1, it forms primarily of luminescence unit 1, sampling unit 2, probe unit 3 and signal processing and analysis unit 4; Luminescence unit 1 comprises the three road subchannels that main channel 11 and one end, main channel 11 are divided into, and be defined as absorbing path 12, attenuation path 13 and reference channel 14 respectively, main channel 11 is directly communicated with absorbing path 12, and attenuation path 13 is directly communicated with reference channel 14;
As shown in Figure 2, the damping assemblies 114 that in main channel 11, spatially order is provided with snoot 111 successively, the light source 112, three of sampling high stable halogen tungsten lamp glues together the concentrating component 113 of achromat, attenuator is formed, diaphragm component 115, first shutter assembly 116 in high power aperture and collimating mirror group 118; (this junction is called the two top for main channel 11 and absorbing path 12 connectivity part, the other end is then referred to as terminal), (this junction is called the two top for attenuation path 13 and reference channel 14 connectivity part, the other end is then referred to as terminal) two the first beam splitter 1171 and the second beam splitters 1172 formed by beam splitter prism are set respectively, make light signal by continuous beam splitting, after being finally divided into three beams, enter three road subchannels respectively; In three road subchannels, absorbing path 12 is parallel with attenuation path 13 after right-angle turning, the inherent described right-angle turning place of absorbing path arranges right-angle prism 121, the terminal of absorbing path 12 and attenuation path 13 arranges the sapphire window in uniform height and direction respectively, be defined as the first absorbing window 122 and the first decay window 131 respectively, the first converging lenses group 61 is set in reference channel 14;
As shown in Figure 3, probe unit 3 comprises three road receiving cables, is defined as respectively and absorbs receiving cable 31, decay receiving cable 32 and reference receiving cable 33; Absorption receiving cable 31 and decay receiving cable 32 have the sapphire window in uniform height and direction, be defined as the second absorbing window 311 and the second decay window 321 respectively, be connected by optical fiber 5 with the reference channel of luminescence unit 1 with reference to receiving cable 33 one end (being called terminal), it is inner that the other end (being called top) is communicated to decay receiving cable 32; Absorb in receiving cable 31 and be also provided with homogenizer 312 and energy harvester 313; In decay receiving cable 32, the second shutter assembly 322 being set in the one end near the second decay window 321, arranging bundling device 323 with reference to receiving cable 33 connectivity part, being also provided with the second converging lenses group 62 in the one end away from the second decay window; Optical fiber joint end with reference to receiving cable 33 arranges the 3rd shutter assembly 331, is also provided with the 3rd converging lenses group 63 along optical path direction;
Sampling unit 2 comprises the first water sample passage 21 and the second water sample passage 22, first water sample passage 21 both ends open, connect the first absorbing window 122 and the second absorbing window 311 respectively, second water sample passage 22 both ends open, connect the first decay window 131 respectively and the second decay window 321, two water sample passages are provided with water sample import and export; First water sample passage 21 inwall is through the process of plating high reverse--bias rete, and the second water sample passage 22 inwall top layer is through blackening process; First water sample passage 21 and the second water sample passage 22 are detachable pipeline, and end is connected with each windows active;
Signal processing and analysis unit 4 is provided with two spectroanalysis instruments, is connected with the absorption receiving cable 31 of probe unit 3 respectively by optical fiber 5 with receiving cable 32 of decaying;
Probe unit 3 rear portion is furnished with power interface, automatically controlled and number biography interface.By controlling, cable is unified to be controlled by external controller for electronic shutter and light source switch; in addition sampling unit 2 is also provided with cable passage 23; protection power cable, optical fiber and control cable are responsible in cable passage 23, and various cable is transferred to probe unit 3 by luminescence unit 1.
In water body light absorption attenuation coefficient measuring instrument of the present invention, luminescence unit provides spectrum to enrich the light source of stable performance for water body parameter measurement; Sampling unit mainly realizes the sampling of water body example; Probe unit realizes the detection of optical radiation signal, carries the parameter information of water body in this signal; Signal processing and analysis unit can carry out spectral analysis to the information detected, and provides underlying parameter data for water body attenuation and absorption parameter calculates.
When the present embodiment measuring instrument uses, above-mentioned most preferred measuring instrument principle of work is roughly as follows: the optical radiation of light source 112 outgoing of high stable halogen tungsten lamp is imaged onto diaphragm component 115 position through snoot 111 and concentrating component 113, arranging damping assemblies 114 in the optical path, to realize light intensity controlled, provides regulated quantity for system obtains comparatively high s/n ratio.First shutter assembly 116 realizes blocking of whole light path, can provide means to the measurement of system dark noise.Beam splitter (comprising the first beam splitter 1171 and the second beam splitter 1172 formed by beam splitter prism) realizes light path four via design, makes the light signal separated enter attenuation path 13, absorbing path 12 and reference channel 14 respectively.The light signal of attenuation path 13 is exported by the first decay window 131 and enters the second water sample passage 22, and its inwall is the absorbing path through blackening process, can absorb the parasitic light signal of seawater.The light signal of absorbing path 12 is exported by the first absorbing window 122 and enters the first water sample passage 21, and its inwall is the passage of plating high reverse--bias rete process, can reflect the parasitic light signal of seawater.Reference channel 14 light signal reaches probe unit 3 by optical fiber 5 through cable passage 23 through the first converging lenses group 61.The power cable of light source 112, the control cable of shutter and power cable are delivered to probe unit 3 through cable passage 23 together, and transfer to external controller to carry out unifying to control.Light signal enters probe unit 3 through the second decay window 321, bundling device 323 can be merged into into spectroanalysis instrument with reference to the light signal of the light signal of receiving cable 33 and decay receiving cable 32, second shutter assembly 322 and the 3rd shutter assembly 331 are responsible for light path break-make, and the receiving cable 32 that can realize decaying is measured and with reference to the selective measurement of light signal of receiving cable 33.Light signal enters probe unit 3 through the second absorbing window 311, and the large angle incidence light by absorbing path can receive by homogenizer 312, after energy harvester 313 is collected, enters spectroanalysis instrument by optical fiber 5.
Embodiment 2
A measuring method for water body light absorption attenuation coefficient, can measure any one water body in seawater, lake water and river, it adopts the measuring instrument described in embodiment 1, comprises the following steps:
Light source 112 in step 1, unlatching water body light absorption attenuation coefficient measuring instrument in luminescence unit 1 main channel 11, the light signal that light source 112 sends, through the adjustment of concentrating component 113, damping assemblies 114, diaphragm component 115, is transported to the first shutter assembly 116 in main channel 11.
Step 2, open the first shutter assembly 116, light signal is made to be transferred to the first beam splitter 1171 and the second beam splitter 1172, light signal is divided into three tunnels by the first beam splitter 1171 and the second beam splitter 1172, enters absorbing path 12, attenuation path 13 and reference channel 14 respectively.
Step 3, the first water sample passage 21 and the second water sample passage 22 is introduced in the water sample import that water body to be measured is arranged from the first water sample passage 21 and the second water sample passage 22 respectively, and carries out the operation of following step simultaneously:
The first via light signal arriving the first absorbing window 122 through absorbing path 12 enters the first water sample passage 21 from the first absorbing window 122, through water body to be measured, enter through the second absorbing window 311 and absorb receiving cable 31, spectroanalysis instrument is passed to through optical fiber again after optically focused process, measured as the first light signal fed back (i.e. absorption signal);
The the second road light signal arriving the first decay window 131 through attenuation path 13 enters the second water sample passage 22 from the first decay window 131, through water body to be measured, decay receiving cable 32 is entered through the second decay window 321, spectroanalysis instrument is passed to through optical fiber again after optically focused process, measured as the second light signal fed back (i.e. deamplification);
The 3rd road light signal entering reference channel 14 is delivered to reference to receiving cable 33 by optical fiber after the first converging lenses group 61 carries out optically focused process, then is passed to spectroanalysis instrument through optical fiber, measured as the 3rd feedback signal (i.e. reference signal).
The interpretation of result of the first light signal fed back, the second light signal fed back and the 3rd light signal fed back that step 4, measurement obtain obtains water body light absorption attenuation coefficient.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and this embodiment is also not used to limit the scope of the claims of the present invention, and the equivalence that all the present invention of disengaging do is implemented or changed, and all should be contained in the scope of the claims of this case.
Claims (10)
1. a water body light absorption attenuation coefficient measuring method, it is characterized in that, it comprises the following steps:
Step 1, the light sent by same light source are divided into three tunnels;
Step 2, carry out following measurement simultaneously:
First via light signal being inputed in absorbing path again by producing the first light signal fed back after water body to be measured, receiving this first light signal fed back as absorbing path measurement result;
Second road light signal being inputed in attenuation path again by producing the second light signal fed back after water body to be measured, receiving this second light signal fed back as attenuation path measurement result;
3rd road light signal is directly exported the 3rd light signal fed back, receives the 3rd light signal fed back as reference light path measurement result;
Step 3, obtain the water body absorption coefficient of light and water body light attenuation coefficient according to described absorbing path measurement result, attenuation path measurement result and reference path measurement result.
2. water body light absorption attenuation coefficient measuring method according to claim 1, it is characterized in that, described method is realized by water body light absorption attenuation coefficient measuring instrument, described water body light absorption attenuation coefficient measuring instrument comprises luminescence unit (1), sampling unit (2), probe unit (3) and signal processing and analysis unit (4), wherein:
The three road subchannels that described luminescence unit (1) comprises main channel (11) and is divided in the rear end of main channel (11), be interconnected between described main channel (11) and subchannel, the light source assembly producing light signal is provided with in described main channel (11), main channel (11) and the connectivity part of subchannel being provided with the beam splitter for described light signal being divided into three beams, after making light signal be divided into three beams, entering three road subchannels respectively; In three road subchannels, wherein the terminal of the first subchannel and the second subchannel has closed first window and Second Window;
Described probe unit (3) comprises three road receiving cables, and wherein, the top of the first receiving cable and the second receiving cable has the 3rd closed window and the 4th window, and the 3rd receiving cable is connected with the second receiving cable;
Described sampling unit (2) comprises for connecting first window and the first water sample passage (21) of the 3rd window and the second water sample passage (22) for being connected Second Window and the 4th window;
Described signal processing and analysis unit (4) is provided with spectroanalysis instrument;
The terminal of the 3rd subchannel is connected by the terminal of optical fiber with the 3rd receiving cable, in the connectivity part of the 3rd receiving cable and the second receiving cable, one bundling device (323) is installed, described bundling device (323) for carrying out conjunction point after the 3rd receiving cable after the second receiving cable with the light signal in the second subchannel by the light signal in the 3rd subchannel, and then being sent to the terminal of the second receiving cable, the light signal in described first subchannel is sent to the terminal of the first receiving cable; The terminal of described first receiving cable and the terminal of the second receiving cable are all connected with spectroanalysis instrument by optical fiber;
Described the first to three subchannel is absorbing path (12), attenuation path (13) and reference channel (14), described the first to three receiving cable is respectively and absorbs receiving cable (31), decay receiving cable (32) and reference receiving cable (33), and first to fourth window described is respectively the first absorbing window (122), the first decay window (131), the second absorbing window (311) and the second decay window (321);
The inwall of described first water sample passage (21) is coated with reflective coating, and the inwall of described second water sample passage (22) is through blackening process.
3. water body light absorption attenuation coefficient measuring method according to claim 2, it is characterized in that, the rear end of described main channel (11) extends to form attenuation path (13), described reference channel (14) is directly communicated with attenuation path (13), described absorbing path (12) is directly communicated with main channel (11), described beam splitter comprises first beam splitter (1171) of the connectivity part being arranged at absorbing path (12) and main channel (11), and be arranged at second beam splitter (1172) of connectivity part of reference channel (14) and attenuation path (13).
4. water body light absorption attenuation coefficient measuring method according to claim 3, it is characterized in that, described first absorbing window (122), the first decay window (131), the second absorbing window (311) and the second decay window (321) are sustained height and direction, and they are all closed by sapphire; Described first absorbing path comprises and the vertical absorbing path that be communicated with and with the described vertical absorbing path vertical aligned adsorbent passage that be also communicated with vertical with main channel (11), installs a right-angle prism (121) in the connectivity part of described vertical absorbing path and aligned adsorbent passage.
5. water body light absorption attenuation coefficient measuring method according to claim 4, it is characterized in that, described light source assembly comprises the light source (112) that spatially order sets gradually from front end to its rear end of main channel (11), concentrating component (113), damping assemblies (114), diaphragm component (115) and the first shutter assembly (116), an opening is installed on towards in the snoot (111) of concentrating component (113) at described light source (112), light path between the first beam splitter (1171) and the first shutter assembly (116) is also installed a collimating mirror group (118).
6. water body light absorption attenuation coefficient measuring method according to claim 5, it is characterized in that, in the reference receiving cable (33) in the decay receiving cable (32) in reference channel (14), between bundling device (323) and the terminal of decay receiving cable (32) and between the terminal of bundling device (323) and reference receiving cable (33), be separately installed with the first converging lenses group (61), the second converging lenses group (62) and the 3rd converging lenses group (63); Be provided with homogenizer (312) and energy harvester (313) in described absorption receiving cable (31), described homogenizer (312) is positioned at the second absorbing window (311) side.
7. water body light absorption attenuation coefficient measuring method according to claim 6, it is characterized in that, in the decay receiving cable (32) between bundling device (323) and the second decay window (321) and the 3rd converging lenses group (63) away from being separately installed with the second shutter assembly (322) and the 3rd shutter assembly (331) in the reference receiving cable (33) of bundling device (323) side; Described first shutter assembly (116), the second shutter assembly (322) and the 3rd shutter assembly (331) are electronic shutter, and by external controller, by controlling, cable is unified to be controlled the switch of described electronic shutter and light source (112).
8. water body light absorption attenuation coefficient measuring method according to claim 7, it is characterized in that, described step 1 comprises:
Light source (112) in step 11, unlatching water body light absorption attenuation coefficient measuring instrument in luminescence unit (1) main channel (11), the light signal that light source (112) sends, through the adjustment of concentrating component (113), damping assemblies (114), diaphragm component (115), is transported to the first shutter assembly (116) in main channel (11);
Step 12, open the first shutter assembly (116), light signal is made to be transferred to the first beam splitter (1171) and the second beam splitter (1172), light signal is divided into three tunnels by the first beam splitter (1171) and the second beam splitter (1172), enters absorbing path (12), attenuation path (13) and reference channel (14) respectively.
9. water body light absorption attenuation coefficient measuring method according to claim 8, it is characterized in that, described step 2 comprises:
The first water sample passage (21) and the second water sample passage (22) are introduced in the water sample import that water body to be measured is arranged from the first water sample passage (21) and the second water sample passage (22) respectively;
The first via light signal arriving the first absorbing window (122) through absorbing path (12) enters the first water sample passage (21) from the first absorbing window (122), through water body to be measured, enter through the second absorbing window (311) and absorb receiving cable (31), spectroanalysis instrument is passed to through optical fiber again after optically focused process, measured as the first light signal fed back;
The the second road light signal arriving the first decay window (131) through attenuation path (13) enters the second water sample passage (22) from the first decay window (131), through water body to be measured, decay receiving cable (32) is entered through the second decay window (321), spectroanalysis instrument is passed to through optical fiber again after optically focused process, measured as the second light signal fed back;
The 3rd road light signal entering reference channel (14) is delivered to reference to receiving cable (33) by optical fiber after the first converging lenses group (61) carries out optically focused process, spectroanalysis instrument is passed to again through optical fiber, measured as the 3rd feedback signal.
10. the water body light absorption attenuation coefficient measuring method according to any one of claim 1-9, is characterized in that, described water body to be measured is any one in seawater, lake water and river.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (7)
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| CN107451413A (en) * | 2017-08-16 | 2017-12-08 | 中国科学院遥感与数字地球研究所 | A kind of water body absorption coefficient bearing calibration and device |
| CN108507956A (en) * | 2018-03-23 | 2018-09-07 | 苏州蛟视智能科技有限公司 | Water body optical attenuation coefficient measuring device and method |
| CN109655412A (en) * | 2018-12-28 | 2019-04-19 | 湖北航天技术研究院总体设计所 | A kind of laser water volume attenuation coefficient field measurement apparatus and method |
| CN113466139A (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） | Equal-arm contrast type water body optical attenuation coefficient measuring device and method |
| CN113466138A (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） | Exchange equal-arm contrast type water body optical attenuation coefficient measuring device and method |
| CN113820276A (en) * | 2021-09-07 | 2021-12-21 | 煤炭科学研究总院 | Multi-channel combined miniature seawater absorption characteristic measuring device and mounting structure |
| CN113984665A (en) * | 2021-11-08 | 2022-01-28 | 山东大学 | System and method for measuring inherent optical characteristics of seawater based on optical filter array |
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Cited By (10)
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| CN107451413A (en) * | 2017-08-16 | 2017-12-08 | 中国科学院遥感与数字地球研究所 | A kind of water body absorption coefficient bearing calibration and device |
| CN107451413B (en) * | 2017-08-16 | 2020-04-21 | 中国科学院遥感与数字地球研究所 | Water body absorption coefficient correction method and device |
| CN108507956A (en) * | 2018-03-23 | 2018-09-07 | 苏州蛟视智能科技有限公司 | Water body optical attenuation coefficient measuring device and method |
| CN109655412A (en) * | 2018-12-28 | 2019-04-19 | 湖北航天技术研究院总体设计所 | A kind of laser water volume attenuation coefficient field measurement apparatus and method |
| CN113466139A (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） | Equal-arm contrast type water body optical attenuation coefficient measuring device and method |
| CN113466138A (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） | Exchange equal-arm contrast type water body optical attenuation coefficient measuring device and method |
| CN113466139B (en) * | 2021-06-23 | 2022-07-19 | 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） | Equal-arm contrast type water body optical attenuation coefficient measuring device and method |
| CN113466138B (en) * | 2021-06-23 | 2022-10-18 | 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） | Exchange equal-arm contrast type water body optical attenuation coefficient measuring device and method |
| CN113820276A (en) * | 2021-09-07 | 2021-12-21 | 煤炭科学研究总院 | Multi-channel combined miniature seawater absorption characteristic measuring device and mounting structure |
| CN113984665A (en) * | 2021-11-08 | 2022-01-28 | 山东大学 | System and method for measuring inherent optical characteristics of seawater based on optical filter array |
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