A device and method for long-term automatic measurement of hyperspectral water absorption attenuation

Abstract

The present invention discloses a device and method for long-term automatic measurement of high-spectral water absorption attenuation. The device comprises a high-spectral water absorption attenuation measuring instrument, a sample chamber, a seawater filter and a pure water storage tank. The water sample outlet of the sample chamber is connected to a tee pipe 1, which is respectively connected to tee pipes 2 and tee pipes 3, and tee pipes 2 are connected to tee pipes 4 and outlet 1; tee pipes 3 are connected to tee pipes 5 and outlet 2; tee pipes 4 are connected to the outlet of the seawater filter and the lower port of the A tube of the measuring instrument, and tee pipes 5 are connected to the pure water storage tank and the lower port of the C tube of the measuring instrument; the upper port of the A tube is connected to the A port of the sample chamber, and the upper port of the C tube is connected to the C port of the sample chamber, and the A port and the C port are respectively connected to the two inlets of a two-input and one-output check valve in the sample chamber; the other outlet of the tee pipe 6 is connected to the water sample inlet of the sample chamber. The device and method disclosed by the present invention can avoid bubbles from gathering in the measuring instrument, and can be automatically cleaned to ensure the measurement effect.

Description

Technical Field

[0001] The present invention relates to the technical field of ocean monitoring instruments, and in particular to a device and method for long-term automatic measurement of high-spectrum water body absorption attenuation. Background Art

[0002] The hyperspectral water absorption attenuation meter (AC-S) is currently the main instrument for in-situ measurement of water absorption and attenuation coefficients in the world. The traditional method of using AC-S instruments is to use a mooring method, that is, to place the entire instrument in seawater. However, this method must be operated manually and cannot be used online for a long time. In recent years, a water sampling method has appeared on buoys, shore stations, and scientific research ships, that is, to carry AC-S on an offshore platform or ship, and extract water samples and send them to the instrument through the water supply and drainage system. After the measurement is completed, the water samples are discharged. This method has the following problems:

[0003] The main measurement principle of the AC-S instrument is that the water sample enters the absorption tube and attenuation tube of the instrument, the light beam is emitted from the transmitting end to pass through the water sample, and the light signal is received by the receiving end, and the absorption attenuation coefficient is obtained through calculation. Therefore, if there are bubbles, dirt, and impurities in the water sample, it will directly affect the measurement results. When the water sample supply method is used for long-term operation, due to the pressure change of the pump and the circulation of the water sample in different pipelines, there will be air mixing and bubble precipitation. If the bubbles eventually gather in the absorption tube and attenuation tube, it will affect the accuracy of the measurement. Therefore, a device is needed that can provide effective water samples and realize long-term automatic operation and maintenance of the instrument. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a device and method for long-term automatic measurement of hyperspectral water absorption attenuation, so as to avoid bubble accumulation in the measuring instrument and ensure the measurement effect.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A device for long-term automatic measurement of hyperspectral water absorption attenuation comprises a hyperspectral water absorption attenuation measuring instrument, a sample chamber, a seawater filter and a pure water storage tank, wherein the water sample outlet of the sample chamber is connected to a tee pipe 1 through a pipeline 1, the tee pipe 1 is respectively connected to a tee pipe 2 and a tee pipe 3, the tee pipe 2 is connected to a tee pipe 4 through a pipeline 2, and is connected to the outlet 1 through a pipeline 3; the tee pipe 3 is connected to a tee pipe 5 through a pipeline 4, and is connected to the outlet 2 through a pipeline 5;

[0007] The three-way pipe four is connected to the outlet of the seawater filter through the pipeline six, and is connected to the lower port of the A tube of the measuring instrument through the pipeline seven. The three-way pipe five is connected to the pure water storage tank through the pipeline eight, and is connected to the lower port of the C tube of the measuring instrument through the pipeline nine. A submersible pump one is arranged on the pipeline eight; the upper port of the A tube of the measuring instrument is connected to the A port of the sample chamber through the pipeline ten, and the upper port of the C tube of the measuring instrument is connected to the C port of the sample chamber through the pipeline eleven. The A port and the C port are respectively connected to the two inlets of the two-input and one-output check valve in the sample chamber, and the outlet of the two-input and one-output check valve is connected to the pipeline twelve, and the outlet of the pipeline twelve is located in the sample chamber;

[0008] The inlet of the seawater filter is connected to the submersible pump 2 via a three-way pipe 6, and the other outlet of the three-way pipe 6 is connected to the water sample inlet of the sample chamber via a pipeline 13;

[0009] Solenoid valves are arranged on the pipeline one, pipeline two, pipeline three, pipeline four, pipeline five, pipeline six, pipeline eight, pipeline twelve and pipeline thirteen.

[0010] In the above solution, the second tee pipe and the third tee pipe are Y-shaped tee pipes.

[0011] In the above solution, an inclined S-shaped guide plate is provided in the sample chamber, and the water sample inlet of the sample chamber passes through the upper part of the guide plate.

[0012] In the above scheme, solenoid valve 1, solenoid valve 2, solenoid valve 3, solenoid valve 4, solenoid valve 5, solenoid valve 6, solenoid valve 7, solenoid valve 8 and solenoid valve 9 are respectively arranged on pipeline 1, pipeline 2, pipeline 3, pipeline 4, pipeline 5, pipeline 6, pipeline 8, pipeline 12 and pipeline 13, and a filter is also arranged on pipeline 13.

[0013] In a further technical solution, an overflow port is arranged on the upper part of the sample chamber, the overflow port is higher than the outlet of the solenoid valve 8, the outlet of the solenoid valve 8 is higher than the water sample inlet of the sample chamber, and the outlet position of the solenoid valve 8 is not lower than the inlet position of the solenoid valve 8.

[0014] In the above scheme, the A port and the C port of the sample chamber are installed at the same height, forming an angle of 45° with the cylindrical wall of the sample chamber in the vertical direction, the part inside the sample chamber is higher than the part outside the sample chamber, the two-inlet and one-outlet one-way valve is installed at an angle of 45°, the outlet is higher than the inlet, and the pipeline ten is arranged in parallel with the pipeline eleven.

[0015] In the above scheme, the sample chamber is cylindrical, the bottom is funnel-shaped, and the water sample outlet is in the middle of the bottom.

[0016] In the above scheme, the installation position of the tee pipe 2 is lower than that of the tee pipe 4, and the installation position of the tee pipe 4 is lower than the lower end of the A tube of the measuring instrument; the installation position of the tee pipe 3 is lower than the position of the tee pipe 5, and the installation position of the tee pipe 5 is lower than the lower end of the C tube of the measuring instrument.

[0017] In the above scheme, the installation position of port A of the sample chamber is higher than the upper end of tube A of the measuring instrument, so that the angle between pipeline 10 and the horizontal plane is greater than 45°; the installation position of port C of the sample chamber is higher than the upper end of tube C of the measuring instrument, so that the angle between pipeline 11 and the horizontal plane is greater than 45°.

[0018] A method for long-term automatic measurement of hyperspectral water absorption attenuation, using the above-mentioned device for long-term automatic measurement of hyperspectral water absorption attenuation, includes the following process:

[0019] (1) Sampling: The seawater sample is drawn into the sample chamber by a submersible pump. After the sample is drawn, the sample is left to stand for a period of time to release the large bubbles generated by the pumping.

[0020] (2) Sampling: After standing still, the electromagnetic valve is controlled. Depending on the water level pressure, the seawater sample enters the A and C tubes of the measuring instrument from the water sample outlet through pipes 2 and 7, as well as pipes 4 and 9. Due to the pressure difference, small bubbles will gather at the two-in-one-out check valve and overflow;

[0021] (3) Measurement: After the second static period, the measuring instrument starts measuring;

[0022] (4) Primary emptying: After the measurement is completed, open the corresponding solenoid valve to discharge the sample. The water sample in the sample chamber passes through tee one, tee two and tee three from the water sample outlet and is discharged from outlet one and outlet two. The water sample in tube A of the measuring instrument passes through tee four and tee two from the lower outlet of tube A and is discharged from outlet one. The water sample in tube C of the measuring instrument passes through tee five and tee three from the lower outlet of tube C and is discharged from outlet two.

[0023] (5) Cleaning: including two processes: filtered seawater cleaning and pure water cleaning;

[0024] Filtered seawater for cleaning: After the measurement is completed, the seawater is pumped into the seawater filter through the submersible pump 2. The filtered seawater enters the A pipe of the measuring instrument through the tee pipe 4, enters the A port of the sample chamber through the pipe 10, enters the C port of the sample chamber through the two-in-one-out check valve, and then enters the C pipe of the measuring instrument through the pipe 11, and finally passes through the pipe 9, pipe 4, and tee pipe 3, and is discharged from the outlet 2;

[0025] Cleaning with pure water: After cleaning with filtered seawater, use submersible pump 1 to extract pure water stored in the pure water storage tank and reversely enter the measuring instrument. Use pure water for secondary cleaning. The pure water enters the C tube of the measuring instrument through pipeline 8, tee pipe 5, and pipeline 9, and then enters the C port of the sample room through pipeline 11, enters the A port of the sample room through a two-in-one-out check valve, and then enters the A tube of the measuring instrument through pipeline 10, and finally passes through pipeline 7, pipeline 2, and tee pipe 2, and is discharged from outlet 1;

[0026] (6) Secondary emptying: Open the solenoid valve to form the corresponding water path to discharge the pure water. The pure water in the sample chamber passes through Tee 1, Tee 2 and Tee 3 from the water sample outlet and is discharged from Outlet 1 and Outlet 2. The pure water in the A tube of the measuring instrument passes through Tee 4 and Tee 2 from the lower outlet of the A tube and is discharged from Outlet 1. The pure water in the C tube of the measuring instrument passes through Tee 5 and Tee 3 from the lower outlet of the C tube and is discharged from Outlet 2.

[0027] Through the above technical solution, the hyperspectral water absorption attenuation long-term automatic measurement device and method provided by the present invention have the following beneficial effects:

[0028] (1) The sample chamber is pre-treated by standing and draining the sample chamber to prevent the submersible pump from directly supplying water to the measuring instrument and causing a large number of bubbles to accumulate inside the measuring instrument, thus affecting the measurement effect. This ensures that the quality of the water sample being measured can achieve the effect of in-situ measurement.

[0029] (2) The guide plate of the sample chamber can make the water sample fall in a more dispersed form, which is conducive to the separation of larger bubbles in the water body. The inclined S surface of the guide plate can gradually gather the bubbles on the surface of the water sample between the guide plate and the wall of the sample chamber as the water level rises, and finally release them.

[0030] (3) By utilizing the water level difference and the balanced pressure, since the paths of tube A and tube C are parallel, the pressure balance is maintained, so that the water sample can enter the instrument in a buffered and stable manner, reducing the generation of secondary bubbles; by utilizing the necking and merging effect of the two water paths merging into one path and the opening aperture of the solenoid valve, suction is generated, causing a small amount of newly generated tiny bubbles to condense and eventually be released and discharged.

[0031] (4) The two balanced water inlet pipes are used not only to eliminate bubbles, but also to filter the seawater and pure water cleaning channels without adding additional pipe devices.

[0032] (5) An overflow port is provided at the top of the sample chamber to prevent the water in the sample chamber from overflowing. In addition, the setting of the overflow port can also ensure the constant pressure when the water sample enters the instrument and when it is placed in a static state for the second time.

[0033] (6) The device and method can be extended to other optical methods for water quality testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0035] Figure 1 A schematic diagram of the overall structure of a long-term automatic measurement device for high-spectral water absorption attenuation disclosed in an embodiment of the present invention;

[0036] Figure 2 A front view of a long-term automatic measurement device for high-spectral water absorption attenuation disclosed in an embodiment of the present invention;

[0037] Figure 3 A rear view of the long-term automatic measurement device for high-spectral water absorption attenuation disclosed in an embodiment of the present invention;

[0038] Figure 4 A cross-sectional front view of a sample chamber disclosed in an embodiment of the present invention;

[0039] Figure 5 A cross-sectional top view of a sample chamber disclosed in an embodiment of the present invention;

[0040] Figure 6 This is a schematic diagram of the structure of a hyperspectral water absorption attenuation measuring instrument;

[0041] Figure 7 This is the program flow chart of the control system.

[0042] In the figure, 1, sample chamber; 2, solenoid valve 1; 3, three-way pipe 1; 4, three-way pipe 2; 5, solenoid valve 3; 6, solenoid valve 2; 7, three-way pipe 4; 8, solenoid valve 6; 9, seawater filter; 10, three-way pipe 6; 11, submersible pump 2; 12, solenoid valve 9; 13, filter screen; 14, three-way pipe 3; 15, solenoid valve 5; 16, solenoid valve 4; 17, three-way pipe 5; 18, solenoid Valve seven; 19, submersible pump one; 20, pure water storage tank; 21, measuring instrument; 22, pipeline one; 23, pipeline two; 24, pipeline three; 25, pipeline four; 26, pipeline five; 27, pipeline six; 28, pipeline seven; 29, pipeline eight; 30, pipeline nine; 31, pipeline ten; 32, pipeline eleven; 33, pipeline twelve; 34, pipeline thirteen; 35, outlet one; 36, outlet two.

[0043] 101. Port A; 102. Two-inlet and one-outlet one-way valve; 103. Solenoid valve eight; 104. Overflow port; 105. Water sample inlet; 106. Guide plate; 107. Water sample outlet; 108. Port C.

[0044] 201, lower end of tube A; 202, tube A; 203, upper end of tube A; 204, upper end of tube C; 205, tube C; 206, lower end of tube C. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0046] The present invention provides a long-term automatic measurement device for high-spectrum water absorption attenuation. Figure 1 , Figure 2 and Figure 3 As shown, it includes a hyperspectral water absorption attenuation measuring instrument (AC-S instrument) 21, a sample chamber 1, a seawater filter 9 and a pure water storage tank 20. The water sample outlet 107 of the sample chamber 1 is connected to the three-way pipe 1 3 through the pipeline 1 22. The three-way pipe 1 3 is respectively connected to the three-way pipe 2 4 and the three-way pipe 14. The three-way pipe 2 4 is connected to the three-way pipe 4 7 through the pipeline 2 23 and connected to the outlet 1 35 through the pipeline 3 24; the three-way pipe 14 is connected to the three-way pipe 17 through the pipeline 4 25 and connected to the outlet 2 36 through the pipeline 5 26.

[0047] The three-way pipe 4 7 is connected to the outlet of the seawater filter 9 through the pipeline 6 27, and is connected to the outlet of the seawater filter 9 through the pipeline 7 28. Figure 6 The lower port 201 of the A tube of the measuring instrument 21 shown in the figure, the three-way pipe 5 17 is connected to the pure water storage tank 20 through the pipeline 8 29, and is connected to the lower port 206 of the C tube of the measuring instrument 21 through the pipeline 9 30, and a submersible pump 19 is arranged on the pipeline 8 29; the upper port 203 of the A tube of the measuring instrument 21 is connected to the A port 101 of the sample chamber 1 through the pipeline 10 31, and the upper port 204 of the C tube of the measuring instrument 21 is connected to the C port 108 of the sample chamber 1 through the pipeline 11 32, and the A port 101 and the C port 108 are respectively connected to the two inlets of the two-input and one-output check valve 102 in the sample chamber 1, and the outlet of the two-input and one-output check valve 102 is connected to the pipeline 12 33, and the outlet of the pipeline 12 33 is located in the sample chamber 1;

[0048] The inlet of the seawater filter 9 is connected to the submersible pump 2 11 through the three-way pipe 6 10, and the other outlet of the three-way pipe 6 10 is connected to the water sample inlet 105 of the sample chamber 1 through the pipeline 13 34;

[0049] Solenoid valve 1 2, solenoid valve 2 6, solenoid valve 3 5, solenoid valve 4 16, solenoid valve 5 15, solenoid valve 6 8, solenoid valve 7 18, solenoid valve 8 103, solenoid valve 9 12 are respectively arranged on pipeline 1 22, pipeline 2 23, pipeline 3 24, pipeline 4 25, pipeline 5 26, pipeline 6 27, pipeline 8 29, pipeline 12 33, and pipeline 13 34, and a filter screen 13 is also arranged on pipeline 13 34. Solenoid valve 8 103 is a solenoid valve that can be used underwater.

[0050] The device also includes a control system, which includes a power supply and an MCU. The MCU drives the submersible pump 19, the submersible pump 2 11, and each solenoid valve through a relay. The control system has 11 switch output ports to control the opening and closing of each solenoid valve, the start and stop of the submersible pump 19 and the submersible pump 2 11, and complete the processes of sampling, standing, measuring, cleaning, and emptying.

[0051] The submersible pump 11 is placed in the seawater, and the rest of the pump can be installed on a buoy, a ship or a platform of a shore station.

[0052] In this embodiment, the second tee pipe 4 and the third tee pipe 14 are Y-shaped tee pipes, which are convenient for draining the pipeline.

[0053] like Figure 1 and Figure 4 As shown, an inclined S-shaped guide plate 106 is provided in the sample chamber 1, and the water sample inlet 105 of the sample chamber 1 passes through the upper part of the guide plate 106. An overflow port 104 is provided at the upper part of the sample chamber 1, and the overflow port 104 is higher than the outlet of the electromagnetic valve 8 103, and the outlet of the electromagnetic valve 8 103 is higher than the water sample inlet 105 of the sample chamber 1, and the outlet position of the electromagnetic valve 8 103 is not lower than the inlet position of the electromagnetic valve 8 103.

[0054] like Figure 4 and Figure 5 As shown, the A port 101 and the C port 108 of the sample chamber 1 are installed at the same height, forming an angle of 45° with the cylinder wall of the sample chamber 1 in the vertical direction, the part inside the sample chamber 1 is higher than the part outside the sample chamber 1, the two-inlet and one-outlet one-way valve 102 is installed at an angle of 45°, the outlet is higher than the inlet, and the pipeline ten 31 is arranged in parallel with the pipeline eleven 32.

[0055] The sample chamber 1 of this embodiment is cylindrical, with a funnel-shaped bottom, and the water sample outlet 107 is located in the middle of the bottom.

[0056] In order to generate a water level difference and facilitate the emptying of the pipeline, the installation position of the tee pipe 2 4 is lower than the position of the tee pipe 4 7, and the installation position of the tee pipe 4 7 is lower than the position of the lower port 201 of the A tube of the measuring instrument 21; the installation position of the tee pipe 3 14 is lower than the position of the tee pipe 5 17, and the installation position of the tee pipe 5 17 is lower than the position of the lower port 206 of the C tube of the measuring instrument 21.

[0057] The installation position of port A 101 of the sample chamber 1 is higher than the upper port 203 of the A tube of the measuring instrument, so that the angle between the pipeline 10 31 and the horizontal plane is greater than 45°; the installation position of port C 108 of the sample chamber 1 is higher than the upper port 204 of the C tube of the measuring instrument, so that the angle between the pipeline 11 32 and the horizontal plane is greater than 45°.

[0058] Submersible pump 19 and submersible pump 2 11 provide pure water and seawater respectively, with an average flow rate of >5.0L / min.

[0059] The seawater filter 9 adopts a stainless steel filter element with a pore size of 50 μm.

[0060] The filter screen 13 is made of a stainless steel filter screen with a pore size of 1 mm.

[0061] The connecting pipe is made of black Teflon tube with a diameter of 10mm.

[0062] A method for automatically measuring and cleaning a hyperspectral water absorption attenuation, using the above-mentioned hyperspectral water absorption attenuation long-term automatic measuring device, includes the following steps:

[0063] (1) Sampling: MCU starts submersible pump 11 to extract seawater sample, which enters sample chamber 1. The water sample flows down along the guide plate, and after the sample reaches the preset height, it is left to stand. In this process, due to the function of guide plate 106, large bubbles generated by pump pressure changes are eliminated and released.

[0064] Specific process: submersible pump 211 is started, solenoid valve 912 is opened, and other solenoid valves are closed, and the water sample enters the sample chamber according to "submersible pump 211→ three-way pipe 610→ filter screen 13→ water sample inlet 105". When the water sample reaches the preset height, submersible pump 211 and solenoid valve 912 are closed and left to stand for a period of time (1min).

[0065] (2) Sampling: After standing still, the seawater sample slowly and steadily enters tube A and tube C of the measuring instrument relying on the water level pressure.

[0066] Specific process: The control system opens solenoid valve 12, solenoid valve 26, solenoid valve 416, and solenoid valve 8103. Due to the liquid level difference, the water sample flows slowly along the "water sample outlet 107→solenoid valve 12→tee pipe 13" path, and is divided into two paths after passing through the tee pipe 13. One path of the water sample flows along the "tee pipe 13→tee pipe 24→solenoid valve 26→tee pipe 47→lower port 201 of tube A of the measuring instrument→upper port 203 of tube A of the measuring instrument→port 1 of sample chamber 1" 01→two-inlet and one-outlet check valve 102→solenoid valve eight 103”, and the other water sample goes along “three-way pipe one 3→three-way pipe three 14→solenoid valve four 16→three-way pipe five 17→lower port 206 of C tube of measuring instrument→upper port 204 of C tube of measuring instrument→C port 108 of sample chamber 1→two-inlet and one-outlet check valve 102→solenoid valve eight 103”. Since the height of the pipeline is the same as that of the inlet and the pressure of the two routes is exactly the same, the water sample will enter and fill tube A and tube C simultaneously. Due to the installation position of each flow device and the buoyancy of the bubbles, the newly generated small bubbles in the water sample will move vertically upward, and finally gather at the two-inlet and one-outlet check valve 102, and finally be released into the sample chamber 1 through the solenoid valve eight 103.

[0067] (3) Measurement: After standing for a period of time (5 min), the measuring instrument starts measuring;

[0068] (4) Primary emptying: After the measurement is completed, open the solenoid valve 1 2, the solenoid valve 3 5, the solenoid valve 2 6, the solenoid valve 5 15, the solenoid valve 4 16, and the solenoid valve 8 103. Due to gravity, the water sample in the sample chamber 1 and the water sample in the measuring instrument are discharged from the outlet 1 and the outlet 2.

[0069] Specific process: The water sample in the sample chamber is discharged according to “water sample outlet 107→solenoid valve 2→tee pipe 3→tee pipe 24→solenoid valve 35→outlet 135” and “water sample outlet 107→solenoid valve 2→tee pipe 13→tee pipe 314→solenoid valve 515→outlet 236”.

[0070] The sample in tube A 202 is discharged according to “solenoid valve eight 103 → two-inlet and one-outlet check valve 102 → upper port 203 of tube A → tube A 202 → lower port 201 of tube A → three-way pipe four 7 → solenoid valve two 6 → three-way pipe two 4 → solenoid valve three 5 → outlet one 35”.

[0071] The sample in the C tube 205 is discharged according to “solenoid valve eight 103 → two-inlet and one-outlet one-way valve 102 → C tube upper port 204 → C tube 205 → C tube lower port 206 → three-way pipe five 17 → solenoid valve four 16 → three-way pipe three 14 → solenoid valve five 15 → outlet two 36”.

[0072] (5) Cleaning: including two processes: filtered seawater cleaning and pure water cleaning;

[0073] Filtered seawater cleaning: After the measurement is completed, seawater is pumped into the seawater filter 9 through the submersible pump 11, and the filtered seawater enters the C tube and A tube of the measuring instrument to clean the optical components.

[0074] Specific process: open solenoid valve six 8, solenoid valve four 16, solenoid valve five 15, filter seawater according to "submersible pump two 11 → three-way pipe six 10 → seawater filter 9 → solenoid valve six 8 → three-way pipe four 7 → lower port 201 of tube A of measuring instrument → upper port 203 of tube A of measuring instrument → port A 101 of sample chamber 1 → two-inlet and one-outlet check valve 102 → upper port 204 of tube C → tube C 205 → lower port 206 of tube C → three-way pipe five 17 → solenoid valve four 16 → three-way pipe three 14 → solenoid valve five 15 → outlet two 36", and clean the instrument.

[0075] Cleaning with pure water: After cleaning with filtered seawater, use a submersible pump 19 to extract pure water, which is then fed back into the measuring instrument from the water outlet. Use pure water to perform secondary cleaning on the flow chamber and optical devices.

[0076] Specific process: Open solenoid valve seven 18, solenoid valve two 6, solenoid valve three 5, and clean the instrument according to "pure water storage tank 20→submersible pump one 19→solenoid valve seven 18→tee pipe five 17→lower port 206 of C tube of measuring instrument→upper port 204 of C tube of measuring instrument→C port 108 of sample chamber 1→two-inlet and one-outlet check valve 102→upper port 203 of A tube→A tube 202→lower port 201 of A tube→tee pipe four 7→solenoid valve two 6→tee pipe two 4→solenoid valve three 5→outlet one 35".

[0077] (6) Secondary emptying: Open the solenoid valve to form the corresponding water path and discharge the pure water. The process is the same as the primary emptying.

[0078] The control flow of the program is as follows Figure 7 The specific working steps are as follows:

[0079] The control system receives a command from the main control system to start the working process.

[0080] (1) Sampling and standing: The control system starts the submersible pump 211, opens the solenoid valve 912, draws seawater samples from the seawater inlet and sends them to the sample chamber 1, which lasts for 20 seconds; then turns off the submersible pump 211 and starts standing for 1 minute.

[0081] (2) Sample injection measurement: Open solenoid valve 1 2, solenoid valve 2 6, solenoid valve 4 16, and solenoid valve 8 103, and the water sample enters the measuring instrument 21. After standing for 5 minutes, the control system collects the measurement data and sends it to the main control system.

[0082] (3) Emptying: Open solenoid valve 1 2, solenoid valve 3 5, solenoid valve 2 6, solenoid valve 5 15, solenoid valve 4 16, and solenoid valve 8 103, and the water sample is discharged from the sample chamber 1 and the measuring instrument 21. The emptying time is 1 min.

[0083] (4) Cleaning with filtered seawater: After the emptying is completed, start the submersible pump 2 11, open the solenoid valve 6 8, the solenoid valve 4 16, and the solenoid valve 5 15, and use the seawater drawn from the seawater inlet to clean the instrument with filtered seawater for 30 seconds.

[0084] (6) Pure water cleaning process: After the filtered seawater cleaning is completed, the control system starts the submersible pump 19, opens the solenoid valve 7 18, the solenoid valve 2 6, and the solenoid valve 3 5, and extracts pure water to clean the instrument. After 10 seconds, the solenoid valve is closed and maintained for 30 seconds, and then the emptying process is turned on. The pure water cleaning process does not need to be performed every cycle and can be performed once every 24 hours.

[0085] (7) After a complete measurement and cleaning process is completed, the control system enters the standby state and performs the next cycle of measurement after the timing time is up. The cycle interval is 2 hours.

[0086] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A long-term automatic measurement device for high-spectral water absorption attenuation, characterized in that: It comprises a hyperspectral water absorption attenuation measuring instrument, a sample chamber, a seawater filter and a pure water storage tank, wherein the water sample outlet of the sample chamber is connected to a tee pipe 1 through a pipeline 1, the tee pipe 1 is respectively connected to a tee pipe 2 and a tee pipe 3, the tee pipe 2 is connected to a tee pipe 4 through a pipeline 2, and is connected to the outlet 1 through a pipeline 3; the tee pipe 3 is connected to a tee pipe 5 through a pipeline 4, and is connected to the outlet 2 through a pipeline 5; The three-way pipe four is connected to the outlet of the seawater filter through the pipeline six, and is connected to the lower port of the A tube of the measuring instrument through the pipeline seven. The three-way pipe five is connected to the pure water storage tank through the pipeline eight, and is connected to the lower port of the C tube of the measuring instrument through the pipeline nine. A submersible pump one is arranged on the pipeline eight; the upper port of the A tube of the measuring instrument is connected to the A port of the sample chamber through the pipeline ten, and the upper port of the C tube of the measuring instrument is connected to the C port of the sample chamber through the pipeline eleven. The A port and the C port are respectively connected to the two inlets of the two-input and one-output check valve in the sample chamber, and the outlet of the two-input and one-output check valve is connected to the pipeline twelve, and the outlet of the pipeline twelve is located in the sample chamber; The inlet of the seawater filter is connected to the submersible pump 2 via a three-way pipe 6, and the other outlet of the three-way pipe 6 is connected to the water sample inlet of the sample chamber via a pipeline 13; Solenoid valves are provided on the pipeline 1, pipeline 2, pipeline 3, pipeline 4, pipeline 5, pipeline 6, pipeline 8, pipeline 12 and pipeline 13; An S-shaped guide plate placed obliquely is arranged in the sample chamber, and the water sample inlet of the sample chamber passes through the upper part of the guide plate; The A and C ports of the sample chamber are installed at the same height, forming a 45° angle with the cylinder wall of the sample chamber in the vertical direction, the part inside the sample chamber is higher than the part outside the sample chamber, and the two-inlet and one-outlet one-way valve is installed at an angle of 45°, with the outlet higher than the inlet; The installation position of the tee pipe 2 is lower than that of the tee pipe 4, and the installation position of the tee pipe 4 is lower than the lower opening position of the A tube of the measuring instrument; the installation position of the tee pipe 3 is lower than that of the tee pipe 5, and the installation position of the tee pipe 5 is lower than the lower opening position of the C tube of the measuring instrument; The installation position of the A port of the sample chamber is higher than the upper position of the A tube of the measuring instrument, so that the angle between the pipeline 10 and the horizontal plane is greater than 45°; the installation position of the C port of the sample chamber is higher than the upper position of the C tube of the measuring instrument, so that the angle between the pipeline 11 and the horizontal plane is greater than 45°, and the pipeline 10 is arranged in parallel with the pipeline 11.

2. The device for long-term automatic measurement of water absorption attenuation by using a hyperspectral spectrum according to claim 1, characterized in that: The second tee pipe and the third tee pipe are Y-shaped tee pipes.

3. The device for long-term automatic measurement of water absorption attenuation by using a hyperspectral spectrum according to claim 1, characterized in that: The pipeline 1, pipeline 2, pipeline 3, pipeline 4, pipeline 5, pipeline 6, pipeline 8, pipeline 12 and pipeline 13 are respectively provided with solenoid valve 1, solenoid valve 2, solenoid valve 3, solenoid valve 4, solenoid valve 5, solenoid valve 6, solenoid valve 7, solenoid valve 8 and solenoid valve 9, and a filter is also provided on the pipeline 13.

4. The device for long-term automatic measurement of hyperspectral water absorption attenuation according to claim 3, characterized in that: An overflow port is arranged on the upper part of the sample chamber, the overflow port is higher than the outlet of the electromagnetic valve 8, the outlet of the electromagnetic valve 8 is higher than the water sample inlet of the sample chamber, and the outlet position of the electromagnetic valve 8 is not lower than the inlet position of the electromagnetic valve 8.

5. The device for long-term automatic measurement of hyperspectral water absorption attenuation according to claim 1, characterized in that: The sample chamber is cylindrical, the bottom is funnel-shaped, and the water sample outlet is located in the middle of the bottom.

6. A method for long-term automatic measurement of water absorption attenuation by using a device for long-term automatic measurement of water absorption attenuation by using a hyperspectral spectrum, characterized in that: The process includes the following: (1) Sampling: The seawater sample is extracted through the submersible pump and enters the sample chamber. After the sample is injected, the water sample is left to stand for a period of time to release the large bubbles generated by the pumping; (2) Sampling: After standing still, control the solenoid valve. Relying on the water level pressure, the seawater sample enters the A and C tubes of the measuring instrument from the water sample outlet through pipes 2 and 7, as well as pipes 4 and 9. Due to the pressure difference, small bubbles will gather at the two-in-one-out check valve and overflow; (3) Measurement: After the second static period, the measuring instrument starts measuring; (4) Primary emptying: After the measurement is completed, open the corresponding solenoid valve to discharge the sample. The water sample in the sample chamber passes through tee one, tee two and tee three from the water sample outlet and is discharged from outlet one and outlet two. The water sample in tube A of the measuring instrument passes through tee four and tee two from the lower outlet of tube A and is discharged from outlet one. The water sample in tube C of the measuring instrument passes through tee five and tee three from the lower outlet of tube C and is discharged from outlet two. (5) Cleaning: including two processes: filtering seawater cleaning and pure water cleaning; Filtered seawater for cleaning: After the measurement is completed, the seawater is pumped into the seawater filter through the submersible pump 2. The filtered seawater enters the A pipe of the measuring instrument through the tee pipe 4, enters the A port of the sample chamber through the pipe 10, enters the C port of the sample chamber through the two-in-one-out check valve, and then enters the C pipe of the measuring instrument through the pipe 11, and finally passes through the pipe 9, pipe 4, and tee pipe 3, and is discharged from the outlet 2; Cleaning with pure water: After cleaning with filtered seawater, use submersible pump 1 to extract pure water stored in the pure water storage tank and reversely enter the measuring instrument. Use pure water for secondary cleaning. The pure water enters the C tube of the measuring instrument through pipeline 8, tee pipe 5, and pipeline 9, and then enters the C port of the sample room through pipeline 11, enters the A port of the sample room through a two-in-one-out check valve, and then enters the A tube of the measuring instrument through pipeline 10, and finally passes through pipeline 7, pipeline 2, and tee pipe 2, and is discharged from outlet 1; (6) Secondary emptying: Open the solenoid valve to form the corresponding water path to discharge the pure water. The pure water in the sample chamber passes through Tee 1, Tee 2 and Tee 3 from the water sample outlet and is discharged from Outlet 1 and Outlet 2. The pure water in the A tube of the measuring instrument passes through Tee 4 and Tee 2 from the lower outlet of the A tube and is discharged from Outlet 1. The pure water in the C tube of the measuring instrument passes through Tee 5 and Tee 3 from the lower outlet of the C tube and is discharged from Outlet 2.

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