阅读说明：本技术 一种高光谱水体吸收衰减长期自动测量装置及方法 (Long-term automatic measurement device and method for absorption attenuation of hyperspectral water body ) 是由 李磊 陈世哲 张可可 刘世萱 赵强 于 2020-05-26 设计创作，主要内容包括：本发明公开了一种高光谱水体吸收衰减长期自动测量装置及方法,该装置包括高光谱水体吸收衰减测量仪、样品室、海水过滤器和纯净水储罐,样品室的水样出口连接三通管一,三通管一分别连接三通管二和三通管三,三通管二连接三通管四和出口一；三通管三连接三通管五和出口二；三通管四连接海水过滤器的出口和测量仪的A管下口,三通管五连接纯净水储罐和测量仪的C管下口；A管上口连接样品室的A口,C管上口连接样品室的C口,A口和C口在样品室内分别连接二入一出单向阀的两个入口；三通管六的另一出口连接样品室的水样进口。本发明所公开的装置及方法可以避免气泡在测量仪内集聚,并且能够自动清洗,保证测量效果。(The invention discloses a device and a method for automatically measuring absorption attenuation of a hyperspectral water body for a long time, wherein the device comprises a hyperspectral water body absorption attenuation measuring instrument, a sample chamber, a seawater filter and a purified water storage tank, a water sample outlet of the sample chamber is connected with a first three-way pipe, the first three-way pipe is respectively connected with a second three-way pipe and a third three-way pipe, and the second three-way pipe is connected with a fourth three-way pipe and a first outlet; the three-way pipe III is connected with the three-way pipe V and the outlet II; the fourth three-way pipe is connected with the outlet of the seawater filter and the lower port of the pipe A of the measuring instrument, and the fifth three-way pipe is connected with the purified water storage tank and the lower port of the pipe C of the measuring instrument; the upper port of the A pipe is connected with the port A of the sample chamber, the upper port of the C pipe is connected with the port C of the sample chamber, and the port A and the port C are respectively connected with two inlets of a two-in one-out one-way valve in the sample chamber; the other outlet of the three-way pipe six is connected with a water sample inlet of the sample chamber. The device and the method disclosed by the invention can avoid the accumulation of bubbles in the measuring instrument, can automatically clean and ensure the measuring effect.)

1. A hyperspectral water body absorption attenuation long-term automatic measuring device is characterized by comprising a hyperspectral water body absorption attenuation measuring instrument, a sample chamber, a seawater filter and a purified water storage tank, wherein a water sample outlet of the sample chamber is connected with a first three-way pipe through a first pipeline, the first three-way pipe is respectively connected with a second three-way pipe and a third three-way pipe, the second three-way pipe is connected with a fourth three-way pipe through a second pipeline, and the second three-way pipe is connected with the first outlet through a third pipeline; the three-way pipe III is connected with a three-way pipe V through a pipeline IV and is connected with an outlet II through a pipeline V;

the fourth three-way pipe is connected with an outlet of the seawater filter through a sixth pipeline and is connected with a lower port of a pipe A of the measuring instrument through a seventh pipeline, the fifth three-way pipe is connected with the purified water storage tank through a eighth pipeline and is connected with a lower port of a pipe C of the measuring instrument through a ninth pipeline, and a first submersible pump is arranged on the eighth pipeline; an upper opening of a pipe A of the measuring instrument is connected with an opening A of the sample chamber through a pipeline ten, an upper opening of a pipe C of the measuring instrument is connected with an opening C of the sample chamber through a pipeline eleven, the opening A and the opening C are respectively connected with two inlets of a two-in one-out one-way valve in the sample chamber, an outlet of the two-in one-out one-way valve is connected with a pipeline twelve, and an outlet of the pipeline twelve is positioned in the sample chamber;

the inlet of the seawater filter is connected with a second submersible pump through a third three-way pipe, and the other outlet of the third three-way pipe is connected with a water sample inlet of the sample chamber through a thirteenth pipeline;

and the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the fifth pipeline, the sixth pipeline, the eighth pipeline, the twelfth pipeline and the thirteenth pipeline are all provided with electromagnetic valves.

2. The hyperspectral water body absorption attenuation long-term automatic measurement device according to claim 1 is characterized in that the second three-way pipe and the third three-way pipe are Y-shaped three-way pipes.

3. The hyperspectral water body absorption attenuation long-term automatic measurement device according to claim 1 is characterized in that an S-shaped guide plate is obliquely arranged in the sample chamber, and a water sample inlet of the sample chamber penetrates through the upper part of the guide plate.

4. The hyperspectral water body absorption attenuation long-term automatic measurement device according to claim 1 is characterized in that a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve, a eighth electromagnetic valve, a twelfth electromagnetic valve and a thirteenth electromagnetic valve are respectively arranged on the first pipeline, the second pipeline, the third pipeline, the twelfth pipeline and the thirteenth pipeline, a seventh electromagnetic valve, an eighth electromagnetic valve and a ninth electromagnetic valve are arranged on the thirteenth pipeline, and a filter screen is further arranged on the thirteenth pipeline.

5. The hyperspectral water body absorption attenuation long-term automatic measurement device according to claim 4 is characterized in that an overflow port is arranged at the upper part of the sample chamber, the overflow port is higher than an outlet of an electromagnetic valve eight, an outlet of the electromagnetic valve eight is higher than a water sample inlet of the sample chamber, and the position of the outlet of the electromagnetic valve eight is not lower than the position of an inlet of the electromagnetic valve eight.

6. The hyperspectral water body absorption attenuation long-term automatic measurement device according to claim 1, characterized in that the port A and the port C of the sample chamber are installed at the same height, form an angle of 45 degrees with the cylinder wall of the sample chamber in the vertical direction, the part in the sample chamber is higher than the part outside the sample chamber, the two-inlet one-outlet one-way valve is installed in an inclined way at 45 degrees, and the outlet is higher than the inlet.

7. The hyperspectral water body absorption attenuation long-term automatic measurement device according to claim 1, wherein the sample chamber is cylindrical, the bottom of the sample chamber is funnel-shaped, and the water sample outlet is arranged in the middle of the bottom.

8. The hyperspectral water body absorption attenuation long-term automatic measuring device according to claim 1, wherein the mounting position of the second three-way pipe is lower than that of the fourth three-way pipe, and the mounting position of the fourth three-way pipe is lower than that of the lower opening of the pipe A of the measuring instrument; the mounting position of the third three-way pipe is lower than that of the fifth three-way pipe, and the mounting position of the fifth three-way pipe is lower than that of the lower opening of the pipe C of the measuring instrument.

9. The hyperspectral water body absorption attenuation long-term automatic measurement device according to claim 1, characterized in that the mounting position of the port A of the sample chamber is higher than the position of the upper port of the pipe A of the measurement instrument, so that the angle between the pipeline ten and the horizontal plane is more than 45 degrees; the C opening installation position of the sample chamber is higher than the C pipe upper opening position of the measuring instrument, so that the angle between the pipeline eleven and the horizontal plane is larger than 45 degrees, and the pipeline eleven are arranged in parallel.

10. A hyperspectral water body absorption attenuation long-term automatic measurement method adopts the hyperspectral water body absorption attenuation long-term automatic measurement device as claimed in claim 1, and is characterized by comprising the following processes:

(1) sampling: pumping a seawater sample through a submersible pump II, entering the sample chamber, standing the sample for a period of time after sample injection, and releasing large bubbles generated by pumping;

(2) sample introduction: after standing, controlling an electromagnetic valve, and depending on water level pressure, enabling a seawater sample to enter a pipe A and a pipe C of the measuring instrument from a water sample outlet through a pipe II and a pipe seventh, a pipe IV and a pipe ninth respectively, wherein small bubbles are gathered at a one-way valve for two-in one-out and overflow due to pressure difference;

(3) measurement: after the secondary standing, the measuring instrument starts to measure;

(4) primary emptying: after the measurement is finished, opening a corresponding electromagnetic valve, discharging a sample, discharging a water sample in a sample chamber from a water sample outlet through a first three-way pipe, a second three-way pipe and a third three-way pipe, discharging the water sample from the first outlet and the second outlet, discharging the water sample in a measuring instrument A from a lower opening of the A pipe through a fourth three-way pipe and the second three-way pipe from the first outlet, and discharging the water sample in a measuring instrument C from a lower opening of the C pipe through a fifth three-way pipe and the third three-way pipe from the second outlet;

(5) cleaning: comprises two processes of filtering seawater and cleaning purified water;

filtering seawater and cleaning: after the measurement is finished, pumping seawater into a seawater filter through a submersible pump II, enabling the filtered seawater to enter an A pipe of the measuring instrument through a three-way pipe IV, enter an A port of a sample chamber through a pipeline ten, enter a C port of the sample chamber through a one-way valve II and an one-way valve II, enter a C pipe of the measuring instrument through a pipeline eleven, and finally be discharged from an outlet II through a pipeline nine, a pipeline IV and a three-way pipe III;

cleaning with purified water: after seawater filtering and cleaning, pumping purified water stored in a purified water storage tank by using a first submersible pump, reversely entering a measuring instrument, performing secondary cleaning by using the purified water, enabling the purified water to enter a C pipe of the measuring instrument through an eighth pipeline, a fifth three-way pipe and a ninth pipeline, then enter a C port of a sample chamber through an eleventh pipeline, enter an A port of the sample chamber through a second inlet one-way valve, further enter the A pipe of the measuring instrument through a decimal pipeline, and finally be discharged from a first water outlet through a seventh pipeline, a second pipeline and a second three-way pipe;

(6) secondary emptying: and opening the electromagnetic valve to form a corresponding water path, discharging purified water, discharging the purified water in the sample chamber from a water sample outlet through the first three-way pipe, the second three-way pipe and the third three-way pipe, discharging the purified water from the first outlet and the second outlet, discharging the purified water in the measuring instrument A pipe from the lower opening of the pipe A through the fourth three-way pipe and the second three-way pipe from the first outlet, and discharging the purified water in the measuring instrument C pipe from the lower opening of the pipe C through the fifth three-way pipe and the third three-way pipe from the second outlet.

Technical Field

The invention relates to the technical field of ocean monitoring instruments, in particular to a device and a method for automatically measuring absorption attenuation of a hyperspectral water body for a long time.

Background

A hyperspectral water body absorption attenuation measuring instrument (AC-S) is a main instrument for internationally measuring water body absorption and attenuation coefficients in situ at present. The traditional AC-S instrument is used in a mooring mode, namely the instrument is integrally placed in seawater, but the method needs manual operation and cannot be used online for a long time. In recent years, a water supply sample method is developed on buoys, shore stations and scientific research ships, namely, AC-S is carried on an ocean platform or a ship, water samples are extracted and sent to an instrument through a water supply and drainage system, and the water samples are drained after measurement is completed. This method has the following problems:

the main measurement principle of the AC-S instrument is that a water sample enters an absorption tube and an attenuation tube of the instrument, a light beam emitted by an emitting end penetrates through the water sample, a receiving end receives a light signal, and an absorption attenuation coefficient is obtained through calculation. Therefore, if air bubbles, dirt and impurities exist in the water sample, the measurement result is directly influenced. When the method for supplying the water sample is used for long-term operation, due to the pressure change of the pump and the circulation of the water sample in different pipelines, the phenomena of air mixing, bubble precipitation and the like can exist, and if the bubbles are finally gathered in the absorption tube and the attenuation tube, the accuracy of measurement can be influenced. Therefore, there is a need for a device that can provide an effective water sample while achieving long-term automatic operation and maintenance of the instrument.

Disclosure of Invention

In order to solve the technical problems, the invention provides a device and a method for automatically measuring the absorption attenuation of a hyperspectral water body for a long time, so as to achieve the purposes of avoiding the accumulation of bubbles in a measuring instrument and ensuring the measuring effect.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a hyperspectral water absorption attenuation long-term automatic measuring device comprises a hyperspectral water absorption attenuation measuring instrument, a sample chamber, a seawater filter and a purified water storage tank, wherein a water sample outlet of the sample chamber is connected with a three-way pipe I through a pipeline I; the three-way pipe III is connected with a three-way pipe V through a pipeline IV and is connected with an outlet II through a pipeline V;

the fourth three-way pipe is connected with an outlet of the seawater filter through a sixth pipeline and is connected with a lower port of a pipe A of the measuring instrument through a seventh pipeline, the fifth three-way pipe is connected with the purified water storage tank through a eighth pipeline and is connected with a lower port of a pipe C of the measuring instrument through a ninth pipeline, and a first submersible pump is arranged on the eighth pipeline; an upper opening of a pipe A of the measuring instrument is connected with an opening A of the sample chamber through a pipeline ten, an upper opening of a pipe C of the measuring instrument is connected with an opening C of the sample chamber through a pipeline eleven, the opening A and the opening C are respectively connected with two inlets of a two-in one-out one-way valve in the sample chamber, an outlet of the two-in one-out one-way valve is connected with a pipeline twelve, and an outlet of the pipeline twelve is positioned in the sample chamber;

the inlet of the seawater filter is connected with a second submersible pump through a third three-way pipe, and the other outlet of the third three-way pipe is connected with a water sample inlet of the sample chamber through a thirteenth pipeline;

and the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the fifth pipeline, the sixth pipeline, the eighth pipeline, the twelfth pipeline and the thirteenth pipeline are all provided with electromagnetic valves.

In the scheme, the second three-way pipe and the third three-way pipe are Y-shaped three-way pipes.

In the scheme, the sample chamber is internally provided with the S-shaped guide plate which is obliquely arranged, and the water sample inlet of the sample chamber penetrates through the upper part of the guide plate.

In the above scheme, the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the fifth pipeline, the sixth pipeline, the eighth pipeline, the twelfth pipeline and the thirteenth pipeline are respectively provided with the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the sixth electromagnetic valve, the seventh electromagnetic valve, the eighth electromagnetic valve and the ninth electromagnetic valve, and the thirteenth pipeline is further provided with a filter screen.

In a further technical scheme, an overflow port is arranged at the upper part of the sample chamber, the overflow port is higher than an outlet of an eight electromagnetic valve, the outlet of the eight electromagnetic valve is higher than a water sample inlet of the sample chamber, and the position of the outlet of the eight electromagnetic valve is not lower than the position of an inlet of the eight electromagnetic valve.

In the scheme, the mounting heights of the port A and the port C of the sample chamber are the same, an angle of 45 degrees is formed between the port A and the port C and the cylinder wall of the sample chamber in the vertical direction, the part in the sample chamber is higher than the part outside the sample chamber, the two-in one-out check valve is obliquely mounted for 45 degrees, the outlet is higher than the inlet, and the pipeline ten is parallel to the pipeline eleven.

In the scheme, the sample chamber is cylindrical, the bottom of the sample chamber is funnel-shaped, and the water sample outlet is arranged in the middle of the bottom of the sample chamber.

In the scheme, the mounting position of the second three-way pipe is lower than that of the fourth three-way pipe, and the mounting position of the fourth three-way pipe is lower than that of the lower opening of the pipe A of the measuring instrument; the mounting position of the third three-way pipe is lower than that of the fifth three-way pipe, and the mounting position of the fifth three-way pipe is lower than that of the lower opening of the pipe C of the measuring instrument.

In the scheme, the mounting position of the port A of the sample chamber is higher than the position of the upper port of the pipe A of the measuring instrument, so that the angle between the pipeline ten and the horizontal plane is greater than 45 degrees; the C port installation position of the sample chamber is higher than the C pipe upper port position of the measuring instrument, so that the angle between the pipeline eleven and the horizontal plane is larger than 45 degrees.

A hyperspectral water body absorption attenuation long-term automatic measurement method adopts the hyperspectral water body absorption attenuation long-term automatic measurement device, and comprises the following processes:

(1) sampling: pumping a seawater sample through a submersible pump II, entering the sample chamber, standing the sample for a period of time after sample injection, and releasing large bubbles generated by pumping;

(2) sample introduction: after standing, controlling an electromagnetic valve, and depending on water level pressure, enabling a seawater sample to enter a pipe A and a pipe C of the measuring instrument from a water sample outlet through a pipe II and a pipe seventh, a pipe IV and a pipe ninth respectively, wherein small bubbles are gathered at a one-way valve for two-in one-out and overflow due to pressure difference;

(3) measurement: after the secondary standing, the measuring instrument starts to measure;

(4) primary emptying: after the measurement is finished, opening a corresponding electromagnetic valve, discharging a sample, discharging a water sample in a sample chamber from a water sample outlet through a first three-way pipe, a second three-way pipe and a third three-way pipe, discharging the water sample from the first outlet and the second outlet, discharging the water sample in a measuring instrument A from a lower opening of the A pipe through a fourth three-way pipe and the second three-way pipe from the first outlet, and discharging the water sample in a measuring instrument C from a lower opening of the C pipe through a fifth three-way pipe and the third three-way pipe from the second outlet;

(5) cleaning: comprises two processes of filtering seawater and cleaning purified water;

filtering seawater and cleaning: after the measurement is finished, pumping seawater into a seawater filter through a submersible pump II, enabling the filtered seawater to enter an A pipe of the measuring instrument through a three-way pipe IV, enter an A port of a sample chamber through a pipeline ten, enter a C port of the sample chamber through a one-way valve II and an one-way valve II, enter a C pipe of the measuring instrument through a pipeline eleven, and finally be discharged from an outlet II through a pipeline nine, a pipeline IV and a three-way pipe III;

cleaning with purified water: after seawater filtering and cleaning, pumping purified water stored in a purified water storage tank by using a first submersible pump, reversely entering a measuring instrument, performing secondary cleaning by using the purified water, enabling the purified water to enter a C pipe of the measuring instrument through an eighth pipeline, a fifth three-way pipe and a ninth pipeline, then enter a C port of a sample chamber through an eleventh pipeline, enter an A port of the sample chamber through a second inlet one-way valve, further enter the A pipe of the measuring instrument through a decimal pipeline, and finally be discharged from a first water outlet through a seventh pipeline, a second pipeline and a second three-way pipe;

(6) secondary emptying: and opening the electromagnetic valve to form a corresponding water path, discharging purified water, discharging the purified water in the sample chamber from a water sample outlet through the first three-way pipe, the second three-way pipe and the third three-way pipe, discharging the purified water from the first outlet and the second outlet, discharging the purified water in the measuring instrument A pipe from the lower opening of the pipe A through the fourth three-way pipe and the second three-way pipe from the first outlet, and discharging the purified water in the measuring instrument C pipe from the lower opening of the pipe C through the fifth three-way pipe and the third three-way pipe from the second outlet.

By the technical scheme, the device and the method for automatically measuring the absorption attenuation of the hyperspectral water body for a long time have the following beneficial effects:

(1) the sample chamber pretreatment mode is adopted for one-time standing and emptying, so that the phenomenon that a large amount of bubbles generated by direct water supply of the submersible pump and impacting the inside of the measuring instrument are gathered in the measuring instrument to influence the measuring effect is avoided, and the quality of the measured water sample is ensured to reach the in-situ measuring effect.

(2) The guide plate of the sample chamber can enable a water sample to fall in a more dispersed form, and larger bubbles in a water body can be separated. The inclined S surface of the guide plate can gradually converge the bubbles on the upper surface layer of the water sample between the guide plate and the barrel wall of the sample chamber along with the improvement of the water level, and finally the bubbles are released.

(3) By utilizing the water level difference and the balance pressure, as the pipeline A is parallel to the pipeline C in diameter, the pressure balance is kept, so that a water sample stably enters an instrument in a buffering mode, and the generation of secondary bubbles is reduced; the necking converging effect that two paths of water converge into one path and the opening aperture of the electromagnetic valve are utilized to generate suction force, so that a small amount of newly generated micro bubbles are condensed and finally released and discharged.

(4) The two pipelines for balancing water inlet are used for eliminating bubbles and filtering a cleaning passage of seawater and purified water, and no additional pipeline device is added.

(5) The overflow port is arranged on the upper part of the sample chamber, so that the overflow of the water body in the sample chamber can be avoided, and in addition, the arrangement of the overflow port can also ensure the constancy of the pressure when a water sample enters the instrument and is stood for the second time.

(6) The device and the method can be popularized to water quality detection of other optical methods.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a schematic diagram of an overall structure of a hyperspectral water body absorption attenuation long-term automatic measurement device disclosed by an embodiment of the invention;

FIG. 2 is a front view of a hyperspectral water body absorption attenuation long-term automatic measurement device disclosed by an embodiment of the invention;

FIG. 3 is a rear view of a long-term automatic measurement device for absorption attenuation of a hyperspectral water body disclosed by an embodiment of the invention;

FIG. 4 is a sectional front view of a sample chamber according to an embodiment of the present invention;

FIG. 5 is a sectional top view of a sample chamber according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a hyperspectral water body absorption attenuation measuring instrument;

fig. 7 is a program flow chart of the control system.

In the figure, 1, a sample chamber; 2. a first electromagnetic valve; 3. a first three-way pipe; 4. a third pipe II; 5. a third electromagnetic valve; 6. a second electromagnetic valve; 7. a third pipe; 8. a sixth electromagnetic valve; 9. a seawater filter; 10. a third pipe; 11. a second submersible pump; 12. a ninth electromagnetic valve; 13. a filter screen; 14. a third three-way pipe; 15. a fifth electromagnetic valve; 16. a fourth electromagnetic valve; 17. a fifth three-way pipe; 18. a seventh electromagnetic valve; 19. a first submersible pump; 20. a purified water storage tank; 21. a measuring instrument; 22. a first pipeline; 23. a second pipeline; 24. a third pipeline; 25. a fourth pipeline; 26. a fifth pipeline; 27. a sixth pipeline; 28. a seventh pipeline; 29. a eighth pipeline; 30. a ninth pipeline; 31. a pipeline ten; 32. eleven pipelines; 33. a twelfth pipeline; 34. a pipeline thirteen; 35. an outlet I; 36. and a second outlet.

101. A port A; 102. two-in one-out check valve; 103. an eighth electromagnetic valve; 104. an overflow port; 105. a water sample inlet; 106. a baffle; 107. a water sample outlet; 108. and (C) a port.

201. A lower opening of the pipe A; 202. a pipe A; 203. an upper opening of the pipe A; 204. c, pipe upper opening; 205. c, a pipe; 206. and C, a lower opening of the pipe.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The invention provides a hyperspectral water body absorption attenuation long-term automatic measuring device, which comprises a hyperspectral water body absorption attenuation measuring instrument (AC-S instrument) 21, a sample chamber 1, a seawater filter 9 and a purified water storage tank 20, wherein a water sample outlet 107 of the sample chamber 1 is connected with a three-way pipe I3 through a pipeline I22, the three-way pipe I3 is respectively connected with a three-way pipe II 4 and a three-way pipe III 14, the three-way pipe II 4 is connected with a three-way pipe IV 7 through a pipeline II 23, and is connected with an outlet I35 through a pipeline III 24; tee three 14 is connected to tee five 17 through line four 25 and to outlet two 36 through line five 26.

The fourth three-way pipe 7 is connected with the outlet of the seawater filter 9 through a sixth pipeline 27, is connected with a lower port 201 of a pipe A of the measuring instrument 21 shown in fig. 6 through a seventh pipeline 28, the fifth three-way pipe 17 is connected with the purified water storage tank 20 through a eighth pipeline 29, is connected with a lower port 206 of a pipe C of the measuring instrument 21 through a ninth pipeline 30, and a first submersible pump 19 is arranged on the eighth pipeline 29; the upper port 203 of the A pipe of the measuring instrument 21 is connected with the port A101 of the sample chamber 1 through a pipeline ten 31, the upper port 204 of the C pipe of the measuring instrument 21 is connected with the port C108 of the sample chamber 1 through a pipeline eleven 32, the port A101 and the port C108 are respectively connected with two inlets of the two-in one-out check valve 102 in the sample chamber 1, the outlet of the two-in one-out check valve 102 is connected with a pipeline twelve 33, and the outlet of the pipeline twelve 33 is positioned in the sample chamber 1;

the inlet of the seawater filter 9 is connected with a second submersible pump 11 through a three-way pipe six 10, and the other outlet of the three-way pipe six 10 is connected with a water sample inlet 105 of the sample chamber 1 through a thirteen 34 pipeline;

the first pipeline 22, the second pipeline 23, the third pipeline 24, the fourth pipeline 25, the fifth pipeline 26, the sixth pipeline 27, the eighth pipeline 29, the twelfth pipeline 33 and the thirteenth pipeline 34 are respectively provided with a first electromagnetic valve 2, a second electromagnetic valve 6, a third electromagnetic valve 5, a fourth electromagnetic valve 16, a fifth electromagnetic valve 15, a sixth electromagnetic valve 8, a seventh electromagnetic valve 18, an eighth electromagnetic valve 103 and a ninth electromagnetic valve 12, and the thirteenth pipeline 34 is also provided with a filter screen 13. The electromagnetic valve eight 103 is an electromagnetic valve which can be applied underwater.

The device also comprises a control system, wherein the control system comprises a power supply and an MCU (microprogrammed control unit), and the MCU drives the first submersible pump 19, the second submersible pump 11 and each electromagnetic valve through a relay. The control system is provided with 11 switching value output ports and controls the opening and closing of each electromagnetic valve and the starting and stopping of the first submersible pump 19 and the second submersible pump 11 to complete the processes of sampling, standing, measuring, cleaning, emptying and the like.

The second submersible pump 11 is placed in seawater, and the rest can be arranged on a buoy, a ship or a platform of a shore station.

In this embodiment, the second three-way pipe 4 and the third three-way pipe 14 are Y-shaped three-way pipes, which facilitates evacuation of the pipeline.

As shown in fig. 1 and 4, a S-shaped baffle 106 is disposed in the sample chamber 1 in an inclined manner, and a water sample inlet 105 of the sample chamber 1 penetrates through the upper portion of the baffle 106. An overflow opening 104 is arranged at the upper part of the sample chamber 1, the overflow opening 104 is higher than the outlet of the electromagnetic valve eight 103, the outlet of the electromagnetic valve eight 103 is higher than the water sample inlet 105 of the sample chamber 1, and the outlet position of the electromagnetic valve eight 103 is not lower than the inlet position of the electromagnetic valve eight 103.

As shown in FIGS. 4 and 5, the port A101 and the port C108 of the sample chamber 1 are installed at the same height, form an angle of 45 degrees with the cylinder wall of the sample chamber 1 in the vertical direction, the part in the sample chamber 1 is higher than the part outside the sample chamber 1, the two-in one-out check valve 102 is installed in an inclined way at 45 degrees, the outlet is higher than the inlet, and the pipeline ten 31 and the pipeline eleven 32 are arranged in parallel.

The sample chamber 1 of this embodiment is cylindrical with a funnel-shaped bottom and a sample outlet 107 at the middle of the bottom.

In order to generate a water level difference and facilitate the emptying of the pipeline, the mounting position of the three-way pipe II 4 is lower than that of the three-way pipe IV 7, and the mounting position of the three-way pipe IV 7 is lower than that of the pipe A lower opening 201 of the measuring instrument 21; the installation position of the three-way pipe 14 is lower than that of the five-way pipe 17, and the installation position of the five-way pipe 17 is lower than that of the C pipe lower opening 206 of the measuring instrument 21.

The mounting position of the port A101 of the sample chamber 1 is higher than the position of the upper port 203 of the pipe A of the measuring instrument, so that the angle between the pipeline ten 31 and the horizontal plane is more than 45 degrees; the C port 108 of the sample chamber 1 is arranged at a position higher than the C pipe upper port 204 of the measuring instrument, so that the angle between the eleven 32 pipelines and the horizontal plane is more than 45 degrees.

The first submersible pump 19 and the second submersible pump 11 respectively provide purified water and seawater, and the average flow is more than 5.0L/min.

The seawater filter 9 adopts a stainless steel filter element with the aperture of 50 mu m.

The filter screen 13 is a stainless steel filter screen with a pore diameter of 1 mm.

The pipeline for connection adopts a black Teflon pipe, and the pipe diameter is 10 mm.

The hyperspectral water body absorption attenuation automatic measurement cleaning method adopts the hyperspectral water body absorption attenuation long-term automatic measurement device, and comprises the following processes:

(1) sampling: and the MCU starts the submersible pump II 11 to extract a seawater sample, the seawater sample enters the sample chamber 1, the seawater sample flows down along the guide plate, and the sample is stood after reaching a preset height. In the process, large bubbles generated by the pressure change of the pump are eliminated and released due to the action of the guide plate 106.

The specific process comprises the following steps: and (3) starting the second submersible pump 11, opening the nine electromagnetic valves 12, closing the other electromagnetic valves, and enabling the water sample to enter the sample chamber according to the conditions of the second submersible pump 11 → the six three-way pipe 10 → the filter screen 13 → the water sample inlet 105. And (3) when the water sample reaches the preset height, closing the second submersible pump 11 and the ninth electromagnetic valve 12, and standing for a period of time (1 min).

(2) Sample introduction: after standing, the seawater sample slowly and stably enters the pipe A and the pipe C of the measuring instrument by the self pressure of the water level.

The specific process comprises the following steps: the control system opens the first solenoid valve 2, the second solenoid valve 6, the fourth solenoid valve 16 and the eighth solenoid valve 103, because of the liquid level difference, the water sample slowly flows along the passage of the first solenoid valve 107 → the first solenoid valve 2 → the first three-way pipe 3, and is divided into two paths after passing through the first three-way pipe 3, one path of the water sample is divided into two paths along the passage of the first three-way pipe 3 → the second three-way pipe 4 → the second solenoid valve 6 → the fourth three-way pipe 7 → the lower pipe port 201 of the measuring instrument → the upper pipe port 203 of the measuring instrument A101 of the sample chamber 1 → the first inlet and outlet check valve 102 → the eight solenoid valve 103, the other path of the water sample is divided into two paths along the passage of the first three-way pipe 3 → the third three-way pipe 14 → the fourth solenoid valve 16 → the fifth three-way pipe 17 → the lower pipe 206 of the measuring instrument → the upper pipe port 204 of the measuring instrument → the C port 108, the water sample can synchronously enter and fill the pipe A and the pipe C. Due to the installation position of each circulation device and the buoyancy of the bubbles, the newly generated small bubbles in the water sample move vertically upwards and are finally gathered to the two-in one-out one-way valve 102 and finally released into the sample chamber 1 through the electromagnetic valve eight 103.

(3) Measurement: standing for a period of time (5min), and starting measurement by the measuring instrument;

(4) primary emptying: after the measurement is finished, opening the first electromagnetic valve 2, the third electromagnetic valve 5, the second electromagnetic valve 6, the fifth electromagnetic valve 15, the fourth electromagnetic valve 16 and the eighth electromagnetic valve 103, and discharging the water sample in the sample chamber 1 and the water sample in the measuring instrument from the first outlet and the second outlet due to gravity.

The specific process comprises the following steps: the sample chamber water sample is discharged according to the conditions of water sample outlet 107 → electromagnetic valve I2 → three-way pipe I3 → three-way pipe II 4 → electromagnetic valve III 5 → outlet I35 and water sample outlet 107 → electromagnetic valve I2 → three-way pipe I3 → three-way pipe III 14 → electromagnetic valve V15 → outlet II 36.

The sample in the tube a 202 is discharged according to "solenoid eight 103 → two in and one out check valve 102 → tube a upper port 203 → tube a 202 → tube a lower port 201 → tee pipe four 7 → solenoid two 6 → tee pipe two 4 → solenoid three 5 → outlet one 35".

The sample in the C pipe 205 is discharged in accordance with "solenoid eight 103 → two-in one-out check valve 102 → C pipe upper port 204 → C pipe 205 → C pipe lower port 206 → t-pipe five 17 → solenoid four 16 → t-pipe three 14 → solenoid five 15 → outlet two 36".

(5) Cleaning: comprises two processes of filtering seawater and cleaning purified water;

filtering seawater and cleaning: after the measurement is finished, the seawater is pumped into the seawater filter 9 through the second submersible pump 11, and the filtered seawater enters the pipe C and the pipe A of the measuring instrument to clean the optical device.

The specific process comprises the following steps: opening the six solenoid valves 8, the four solenoid valves 16 and the five solenoid valves 15, filtering seawater according to the sequence of 'diving pump two 11 → tee pipe six 10 → seawater filter 9 → solenoid valve six 8 → tee pipe four 7 → a pipe lower port 201 of the measuring instrument → a pipe upper port 203 of the measuring instrument → a port 101 of the sample chamber 1 → two in and one out check valve 102 → C pipe upper port 204 → C pipe 205 → C pipe lower port 206 → tee pipe five 17 → solenoid valve four 16 → tee pipe three 14 → solenoid valve five 15 → outlet two 36', and cleaning the instrument.

Cleaning with purified water: after the seawater is filtered and cleaned, purified water is pumped by using the first submersible pump 19 and reversely enters the measuring instrument from the water outlet of the measuring instrument, and the flow cavity and the optical device are cleaned for the second time by using the purified water.

The specific process comprises the following steps: opening the seven solenoid valve 18, the second solenoid valve 6 and the third solenoid valve 5, and cleaning the instrument according to the sequence of pure water storage tank 20 → submersible pump one 19 → seven solenoid valve 18 → tee pipe five 17 → C pipe lower port 206 of the measuring instrument → C pipe upper port 204 of the measuring instrument → C port 108 of the sample chamber 1 → two-in one-out check valve 102 → A pipe upper port 203 → A pipe 202 → A pipe lower port 201 → tee pipe four 7 → solenoid valve two 6 → tee pipe two 4 → three solenoid valve three 5 → outlet one 35'.

(6) Secondary emptying: and opening the electromagnetic valve to form a corresponding water path, and discharging the purified water, wherein the purified water is discharged at the same time.

The control flow of the routine is shown in fig. 7. The specific working steps are as follows:

the control system receives the main control system command to start the working process.

(1) Sample introduction and standing: the control system starts the second submersible pump 11, opens the ninth electromagnetic valve 12, extracts a seawater sample from the seawater inlet and sends the seawater sample into the sample chamber 1 for 20 s; and (5) closing the second submersible pump 11, and starting to stand for 1 min.

(2) Sample introduction and measurement: and opening the first electromagnetic valve 2, the second electromagnetic valve 6, the fourth electromagnetic valve 16 and the eighth electromagnetic valve 103, enabling the water sample to enter the measuring instrument 21, standing for 5min, and then collecting the measurement data by the control system and sending the measurement data to the master control system.

(3) Emptying: and opening the first electromagnetic valve 2, the third electromagnetic valve 5, the second electromagnetic valve 6, the fifth electromagnetic valve 15, the fourth electromagnetic valve 16 and the eighth electromagnetic valve 103, discharging the water sample from the sample chamber 1 and the measuring instrument 21, and emptying for 1 min.

(4) Filtering seawater and cleaning: and after the emptying is finished, starting the second submersible pump 11, opening the six 8 electromagnetic valves, the four 16 electromagnetic valves and the five 15 electromagnetic valves, and cleaning the instrument for 30s by using filtered seawater from the seawater inlet.

(6) And (3) a purified water cleaning process: after the filtered seawater is cleaned, the control system starts the first submersible pump 19, opens the seventh electromagnetic valve 18, the second electromagnetic valve 6 and the third electromagnetic valve 5, extracts purified water to clean the instrument, keeps the operation for 10s, closes the electromagnetic valves, keeps the operation for 30s, and then switches to an emptying process. The purified water cleaning process does not need to be carried out every cycle, and can be carried out once in 24 hours.

(7) And after a complete measurement and cleaning process is finished, the control system enters a standby state, and the measurement of the next period is carried out after the timing time is up, wherein the period interval is 2 h.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.