CA3162937C - Method for sampling sea surface microlayer - Google Patents
Method for sampling sea surface microlayer Download PDFInfo
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- CA3162937C CA3162937C CA3162937A CA3162937A CA3162937C CA 3162937 C CA3162937 C CA 3162937C CA 3162937 A CA3162937 A CA 3162937A CA 3162937 A CA3162937 A CA 3162937A CA 3162937 C CA3162937 C CA 3162937C
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- 238000005070 sampling Methods 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000007788 liquid Substances 0.000 claims abstract description 142
- 239000011521 glass Substances 0.000 claims abstract description 84
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 239000013535 sea water Substances 0.000 claims description 28
- 230000000630 rising effect Effects 0.000 claims description 4
- 238000007790 scraping Methods 0.000 abstract description 3
- 108010066278 cabin-4 Proteins 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000002411 adverse Effects 0.000 description 5
- 239000000725 suspension Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
A method for sampling the sea surface microlayer, comprising: step S1: placing a sampling device at a working position above the sea surface; step S2: determining the lowest position, the highest position and the operating speed of a sampling board (3); step S3: a lifting system driving the sampling board (3) to move perpendicular to the sea surface down to the lowest position; step S4: the lifting system driving the sampling board (3) to move perpendicular to the sea surface up to the highest position, and when the sampling board (3) moves to the highest position, a drive mechanism driving a liquid collection tank (16) to rotate so that a side at the top of the liquid collection tank (16) close to a glass plate (13) presses against the glass plate (13); step S5: the lifting system driving the sampling board (3) to move perpendicular to the sea surface down to the lowest position, and while moving down, the side at the top of the liquid collection tank (16) that presses against the glass plate (13) scraping the surface liquid on the glass plate (13) for liquid collection, the liquid being collected into the liquid collection tank (16), and the liquid inside of the liquid collection tank (16) being guided to flow into a collection bottle (6); and step S6: stopping sampling. The described sampling method features high automation, high efficiency of sampling, and ideal sampling thickness, which can meet requirements.
Description
Method for sampling sea surface microlayer Technical Field The present invention relates to the technical field of sea surface microlayer sampling, in particular to a method for sampling sea surface microlayer.
Background Technology Sea surface microlayer is a thin layer between the atmosphere and the ocean surface, with a thickness of about 30-200 pm. It has unique physical, chemical and biological characteristics and can enrich a variety of substances. The determination of various parameters in the sea surface microlayer is of special significance for calculation of substance flux, climate change prediction, environmental condition prediction, marine organism monitoring and so on.
Relevant research has attracted attention in the field of marine sciences for long.
High quality sampling is not only a prerequisite for the study of sea surface microlayer, but also a difficulty in the study of sea surface microlayer.
At present, the sampling methods of sea surface microlayer mainly include the screen method, the glass plate method and the rotation drum method. By using the screen method, a 16-mesh stainless steel wire screen is fixed in a 40 cm X
cm stainless steel frame. The screen surface contacts the water surface, and then it is lifted at a uniform speed. One corner of the screen is vertically placed on the mouth of the sampling bottle to let the water film flow into the sampling bottle.
The thickness of the sea surface microlayer is about (200 10) p.m. The screen sampler is simple to make, easy to operate and can be suitable in bad sea states, but the sampling thickness is large, which is difficult to match the requirements of scientists. The glass plate method is to immerse a flat glass plate with certain specification vertically into the water surface, and then lift it vertically from the water at a certain speed. The seawater from sea surface microlayer with a certain Date Recue/Date Received 2022-05-26 thickness remains on the glass plate, and the residual seawater is scraped into the sampling bottle with a scraper. The general sampling thickness of the glass plate sampler is 40-100 1.1m. The sampling thickness of the glass plate sampler is ideal, and the sampling thickness can match the requirements. The rotation drum method is to coat the surface of the roller (diameter 46 cm, length 61cm) with hydrophilic glass fiber coating. The height of the roller contacting the water surface can be adjusted. The motor is connected with the reducer to adjust the speed of the roller.
The roller moves slowly in the seawater to collect the water layer with a thickness of 50-100 gm. Finally, the seawater is scraped into the sample bottle with a fixed scraper. The sampling thickness of the rotation drum sampler is ideal, but it cannot work under adverse sea states.
Existing patents, such as a Chinese patent with the publication date of August 23, 2019 and the publication number of CN110160840A, has published a glass plate sampler for collecting seawater from the sea surface microlayer and sampling method thereof. However, the sampling process requires manual operation and the operation is complicated. In the sampling process, it is difficult to ensure a proper water inlet angle, water outlet angle and operation speed.
The processes have poor stability, and it is difficult to ensure the sampling quality.
The sampler has low degree of automation and low sampling efficiency, and is not suitable for working under adverse sea states.
Summary of invention Aiming at solving the above-mentioned technical problems, the present invention proposes a sea surface microlayer sampling method with a reasonable sampling thickness, excellent sampling quality, a high degree of automation, a high sampling efficiency and can adapt to certain adverse sea states.
Background Technology Sea surface microlayer is a thin layer between the atmosphere and the ocean surface, with a thickness of about 30-200 pm. It has unique physical, chemical and biological characteristics and can enrich a variety of substances. The determination of various parameters in the sea surface microlayer is of special significance for calculation of substance flux, climate change prediction, environmental condition prediction, marine organism monitoring and so on.
Relevant research has attracted attention in the field of marine sciences for long.
High quality sampling is not only a prerequisite for the study of sea surface microlayer, but also a difficulty in the study of sea surface microlayer.
At present, the sampling methods of sea surface microlayer mainly include the screen method, the glass plate method and the rotation drum method. By using the screen method, a 16-mesh stainless steel wire screen is fixed in a 40 cm X
cm stainless steel frame. The screen surface contacts the water surface, and then it is lifted at a uniform speed. One corner of the screen is vertically placed on the mouth of the sampling bottle to let the water film flow into the sampling bottle.
The thickness of the sea surface microlayer is about (200 10) p.m. The screen sampler is simple to make, easy to operate and can be suitable in bad sea states, but the sampling thickness is large, which is difficult to match the requirements of scientists. The glass plate method is to immerse a flat glass plate with certain specification vertically into the water surface, and then lift it vertically from the water at a certain speed. The seawater from sea surface microlayer with a certain Date Recue/Date Received 2022-05-26 thickness remains on the glass plate, and the residual seawater is scraped into the sampling bottle with a scraper. The general sampling thickness of the glass plate sampler is 40-100 1.1m. The sampling thickness of the glass plate sampler is ideal, and the sampling thickness can match the requirements. The rotation drum method is to coat the surface of the roller (diameter 46 cm, length 61cm) with hydrophilic glass fiber coating. The height of the roller contacting the water surface can be adjusted. The motor is connected with the reducer to adjust the speed of the roller.
The roller moves slowly in the seawater to collect the water layer with a thickness of 50-100 gm. Finally, the seawater is scraped into the sample bottle with a fixed scraper. The sampling thickness of the rotation drum sampler is ideal, but it cannot work under adverse sea states.
Existing patents, such as a Chinese patent with the publication date of August 23, 2019 and the publication number of CN110160840A, has published a glass plate sampler for collecting seawater from the sea surface microlayer and sampling method thereof. However, the sampling process requires manual operation and the operation is complicated. In the sampling process, it is difficult to ensure a proper water inlet angle, water outlet angle and operation speed.
The processes have poor stability, and it is difficult to ensure the sampling quality.
The sampler has low degree of automation and low sampling efficiency, and is not suitable for working under adverse sea states.
Summary of invention Aiming at solving the above-mentioned technical problems, the present invention proposes a sea surface microlayer sampling method with a reasonable sampling thickness, excellent sampling quality, a high degree of automation, a high sampling efficiency and can adapt to certain adverse sea states.
2 Date Recue/Date Received 2022-05-26 In order to achieve the above purpose, the technical scheme adopted by the present invention is:
A sampling method for sampling a sea surface microlayer, comprising the following steps:
step Si: placing a sampling device at a working position above a sea surface;
step S2: determining a lowest position, a highest position and an operation speed of a collecting plate;
step S3: driving with a lifting system the collecting plate to move downward perpendicularly to the sea surface to the lowest position; when the collecting plate moves to the lowest position, a glass plate is immersed in the seawater;
step S4: driving with the lifting system the collecting plate to move upward perpendicularly to the sea surface to the highest position; when the collecting plate moves to the highest position, a driving mechanism drives a liquid collecting tank to rotate and draws a side of a top portion of the liquid collecting tank that is adjacent the glass plate into a position that is close to the glass plate relative to an original position of the side of the top portion of the liquid collecting tank prior to rotation;
step S5: driving with the lifting system the collecting plate to move downward to the lowest position perpendicularly to the sea surface; during descending, the side of the top portion of the liquid collecting tank close to the glass plate scrapes liquid on a surface of the glass plate for liquid collection, collects the liquid into the liquid collecting tank, and directs the liquid in the liquid collecting tank to a collecting bottle; and step S6: stopping sampling.
Preferably, in step Si, the working position is 10-20 cm above the sea surface.
A sampling method for sampling a sea surface microlayer, comprising the following steps:
step Si: placing a sampling device at a working position above a sea surface;
step S2: determining a lowest position, a highest position and an operation speed of a collecting plate;
step S3: driving with a lifting system the collecting plate to move downward perpendicularly to the sea surface to the lowest position; when the collecting plate moves to the lowest position, a glass plate is immersed in the seawater;
step S4: driving with the lifting system the collecting plate to move upward perpendicularly to the sea surface to the highest position; when the collecting plate moves to the highest position, a driving mechanism drives a liquid collecting tank to rotate and draws a side of a top portion of the liquid collecting tank that is adjacent the glass plate into a position that is close to the glass plate relative to an original position of the side of the top portion of the liquid collecting tank prior to rotation;
step S5: driving with the lifting system the collecting plate to move downward to the lowest position perpendicularly to the sea surface; during descending, the side of the top portion of the liquid collecting tank close to the glass plate scrapes liquid on a surface of the glass plate for liquid collection, collects the liquid into the liquid collecting tank, and directs the liquid in the liquid collecting tank to a collecting bottle; and step S6: stopping sampling.
Preferably, in step Si, the working position is 10-20 cm above the sea surface.
3 Date Recue/Date Received 2023-07-26 Preferably, in the step 2, a height of the collecting plate is H; when the collecting plate is in the lowest position, a vertical distance from a contact position between the collecting plate and the side of the top portion of the liquid collecting tank near the glass plate to a bottom portion of the collecting plate is DI, 1 / 2H < D1 <H; and when the collecting plate is in the highest position, the vertical distance from the contact position between the collecting plate and the side of the top portion of the liquid collecting tank near the glass plate to the top portion of the collecting plate is D2, 1 / 2H < D2 < H.
Preferably, in the step S2, the operation speed includes a rising speed and a falling speed of the collecting plate.
Preferably, the collecting plate rises at a uniform speed.
Preferably, in the step 5, the following steps are also included:
When the collecting plate moves to the lowest position, the driving mechanism drives the liquid collecting tank to rotate, and makes the side of the top portion of the liquid collecting groove near the glass plate far away from the glass plate.
Preferably, between the step 5 and the step 6, the following steps are also included:
Judging whether the collecting bottle is full; when the collecting bottle is not full, returning to the step S4; and when the collecting bottle is full, driving with the lifting system the collecting plate to move upward perpendicularly to the sea surface to the highest position, and executing the step S6.
Preferably, the driving mechanism comprises one or more electromagnets, one or more magnets and one or more springs;
When the one or more electromagnets are powered on, the one or more
Preferably, in the step S2, the operation speed includes a rising speed and a falling speed of the collecting plate.
Preferably, the collecting plate rises at a uniform speed.
Preferably, in the step 5, the following steps are also included:
When the collecting plate moves to the lowest position, the driving mechanism drives the liquid collecting tank to rotate, and makes the side of the top portion of the liquid collecting groove near the glass plate far away from the glass plate.
Preferably, between the step 5 and the step 6, the following steps are also included:
Judging whether the collecting bottle is full; when the collecting bottle is not full, returning to the step S4; and when the collecting bottle is full, driving with the lifting system the collecting plate to move upward perpendicularly to the sea surface to the highest position, and executing the step S6.
Preferably, the driving mechanism comprises one or more electromagnets, one or more magnets and one or more springs;
When the one or more electromagnets are powered on, the one or more
4 Date Recue/Date Received 2022-05-26 electromagnets generate magnetic attraction after being energized to make the one or more magnets move towards the one or more electromagnets, and the one or more magnets move to drive the liquid collector to rotate, then make the side of the top portion of the liquid collecting groove near the glass plate close to the glass plate tightly;
When the one or more electromagnets are powered off, the one or more electromagnets lose magnetic force; the one or more magnets are pulled away from the one or more electromagnets by a spring force; movement of the one or more magnets drives the liquid collector to rotate, and makes a side of a top portion of the liquid collecting groove near the glass plate far away from the glass plate.
Preferably, the lifting system is a lead screw lifting system, and the lead screw lifting system comprises at least one lead screw.
Preferably, a control cabin of the control system sends a signal to control rotation of the at least one lead screw and drives the collecting plate to move downward along a track, the control cabin sends a signal to control reverse rotation of the at least one lead screw and drive the collecting plate to move upward along the track, and the control cabin controls turning on and turning off the electromagnets.
Compared with existing methods, the present invention has the following beneficial effects:
The sampling method has reasonable sampling thickness, can match the requirements of researchers with high degree of automation, high sampling quality, excellent stability, and can match the requirements of working under adverse sea states.
The sampling method for sea surface microlayer according to the present Date Recue/Date Received 2022-05-26 invention completes sample collection by setting a lifting system and a driving mechanism. The method is simple and the operation speed is easy to control.
The system includes a collecting plate, and has high automation, high sampling efficiency and ideal sampling thickness. It can match the requirements of scientists, adapt to the adverse sampling environment, and the sampling is authentic and reliable;
Set the side of the top portion of the liquid collecting groove near the glass plate close to the glass plate. During falling of the collecting plate, use the liquid collecting groove to scrape the liquid on the surface of the glass plate. At the same time, during the falling process of the collecting plate, the collecting plate penetrates into the seawater to continue sample collection, so that sampling of the collecting plate and scraping of the liquid collecting groove can be carried out simultaneously, which can simplify the operation steps and have high sampling efficiency;
Set the working position 10-20cm above the sea surface, so that the sampling device is close to the sea surface as much as possible, and because there is an outer case for protection, the waves will not hit the sampling device, waves contaminating the seawater sample can be avoided;
By limiting the lowest position and the highest position of the collecting plate, the liquid collecting groove can be close to the glass plate when rotating during the working process of the collecting plate, so as to prevent the position of the collecting plate from being too high and too low, affecting the relative position of the collecting plate and the liquid collecting groove, and further affecting smooth completion of the collecting work;
Set the collection plate to rise at a uniform speed, which can conduct the collection work smoothly, make a thickness difference between the collected Date Recue/Date Received 2022-05-26 seawater samples small, and can collect the seawater sample matching sampling standards;
The driving mechanism includes electromagnets, magnets and springs.
The electromagnets are configured to generate magnetic force when energized and lose magnetic force when powered off. The magnets are controlled to further control the contact relationship between the liquid collecting groove and the glass plate, which can better control the liquid collecting groove for liquid sample scraping. It has simple structures and involves easy operations;
The lifting system adopts the lead screw lifting system, and the control cabin is configured control the lifting system and the driving mechanism, so that lifting of the collecting plate and rotation of the liquid collecting groove can be done automatically, with a high degree of automation and is easy to control.
Brief description of drawings In order to more clearly explain embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the attached figures which are necessary to be used in the description of the embodiments or the state of art. It is obvious that the attached figures in the following description show only some embodiments of the present invention. For those of ordinary skill in the art, other figures can be obtained according to these figures without paying creative labor.
Figure 1 is a flowchart diagram showing an embodiment of the method for sampling sea surface microlayer disclosed by the present invention;
Figure 2 is a flowchart diagram showing an embodiment of the method for sampling sea surface microlayer disclosed by the present invention;
Figure 3 is an internal assembly drawing of an embodiment of the device for sampling sea surface microlayer disclosed by the invention;
Date Recue/Date Received 2022-05-26 Figure 4 is a structural diagram showing another embodiment of the device for sampling sea surface microlayer disclosed by the present invention;
Figure 5 is a structural diagram of the collecting plate disclosed by the present invention;
Figure 6 is an internal structural diagram of the outer case disclosed by the invention;
Figure 7 is an internal front view of the outer case disclosed by the present invention;
Figure 8 is a structural diagram of the liquid collector disclosed by the present invention;
Figure 9 is an upward view showing another embodiment of the liquid collector disclosed by the present invention.
In the above figures, 1, outer case; 2, lifting ring; 3, collecting plate; 4, control cabin; 5, liquid collector; 6, collecting bottle; 7, lead screw; 8, track; 9, extension hole of the collecting plate; 10, electromagnet; 11, limit groove of liquid collector; 12, glass plate frame; 13, glass plate; 14, magnet; 15, spring; 16, liquid collecting groove; and 17, outlet hole.
Detailed embodiments Next, the present invention will be described in detail through an exemplary embodiment. However, it should be understood that without further description, the elements, structures and features in one embodiment can also be usefully combined with other embodiments.
In the description of the invention, it should be noted that the orientation or position relationship indicated by the terms "inside", "outside", "up", "down", "front", "back", "left", "right" and so on is based on the position relationship shown in the attached figures, only for convenience of describing the present Date Recue/Date Received 2022-05-26 invention and simplifying the description, rather than indicating or implying that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention. In addition, the terms "first", "second"
and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance.
Figure 1, a method for sampling sea surface microlayer includes the following steps:
Step Si: placing the sampling device at the working position above the sea surface.
Specifically, the sampling device is lifted to the working position above the sea surface through a suspender or a folding arm of a ship or other tools.
The working position is determined according to the working condition, making the sampling device as close to the sea surface as possible, and ensuring that the sea waves will not hit the sampling device during the working process to prevent the sea waves from polluting the liquid sample. The working position is 10-20 cm above the sea surface.
Step S2: determining a lowest position, a highest position and an operation speed of the collecting plate.
Specifically, the lowest position and the highest position of the collecting plate are determined according to the relative position of the collecting plate and the liquid collecting groove. The height of the collecting plate is H. When the collecting plate is in the lowest position, the vertical distance from the contact position between the collecting plate and a side of a top portion of the liquid collecting groove near the glass plate to a bottom portion of the collecting plate is D1, 1 / 2H < D1 < H. When the sampling plate is in the highest position, the Date Recue/Date Received 2022-05-26 vertical distance from the contact position between the collecting plate and the side of the top portion of the liquid collecting groove near the glass plate to the top portion of the collection plate is D2, 1 / 2H < D2 < H. The operation speed of the collecting plate is determined according to the thickness to be sampled and the actual sea state. The operation speed is controlled through a control cabin.
The operation speed includes the falling speed and the rising speed of the collecting plate. When the collecting plate rises at a uniform speed, sampling can be done better.
Step S3: the lifting system drives the collecting plate to move downward perpendicularly to the sea surface to the lowest position. When the collecting plate moves to the lowest position, most of the collecting plate is immersed in the sea water.
Specifically, the lifting system is a lead screw lifting system. The lead screw lifting system includes at least one lead screw. A track is arranged on the outer case of the sampling device. The control cabin of the control system sends a signal to control rotation of the lead screw and drive the liquid collecting plate to move downward along the track to the lowest position. The collecting plate extends from the extension hole of the collecting plate at the bottom portion of the outer case and inserts vertically into the seawater. When the collecting plate reaches the lowest position, most of the collecting is immersed in the seawater.
When the collecting plate is vertically inserted into the seawater, sampling can be done better.
Step S4: the lifting system drives the collecting plate to move upward perpendicularly to the sea surface to the highest position. When the collecting plate moves to the highest position, the driving mechanism drives the liquid collecting groove to rotate and make the side of the top portion of the liquid to Date Recue/Date Received 2022-05-26 collecting groove near the glass plate close to the glass plate;
Specifically, the control cabin sends a signal to control the at least one lead screw to rotate reversely to drive the collecting plate to move upward along the track to the highest position. The collecting plate is pulled off from the sea water vertically at a uniform speed, which can better collect samples with thickness matching requirements. The driving mechanism includes electromagnets, magnets and springs. When the collecting plate moves to the highest position, the control cabin controls the electromagnets to be energized.
After the electromagnets are powered on, they generate magnetic force, and the magnets move towards the electromagnets. The magnets move to drive the liquid collector to rotate, making the side of the top portion of the liquid collecting groove near the glass plate to be close to the glass plate.
Step S5: the lifting system drives the collecting plate to move downward to the lowest position perpendicularly to the sea surface. During descending, the side of the top portion of the liquid collecting groove close to the glass plate scrapes liquid on a surface of the glass plate for liquid collection, collects the liquid into the liquid collecting groove, and the liquid in the liquid collecting groove is directed to the collecting bottle;
Specifically, the control cabin of the control system sends a signal to control rotation of the at least one lead screw to drive the collecting plate to move downward to the lowest position. The collecting plate extends from the extension hole of the collecting plate at the bottom portion of the outer case and is vertically inserted into the seawater. During descending, the side at the top portion of the liquid collecting groove to the glass plate scrapes the liquid on the surface of the glass plate for liquid collection. The liquid is collected into the liquid collecting groove. A liquid outlet hole is set on the liquid collecting Date Recue/Date Received 2022-05-26 groove. The collected liquid in the liquid collecting groove flows into the collection bottle through the liquid outlet hole. When the collection plate reaches the lowest position, most of the collecting plate is immersed in seawater;
Step S6: stop sampling.
Specifically, the control cabin controls the sampling device to stop sampling, and the control cabin controls the collecting plate and the liquid collecting groove to return to the state before work.
Figure 2, in the step S5, the steps below are also included:
When the collecting plate moves to the lowest position, the driving mechanism drives the liquid collecting groove to rotate, and makes the side of the top portion of the liquid collecting groove near the glass plate far away from the glass plate.
Specifically, the control cabin controls the electromagnets to power off, the electromagnets lose their magnetic force, the magnets are pulled away from the electromagnets by a spring force, and the magnets move to drive the liquid collector to rotate, so that the side of the top portion of the liquid collecting groove close to the glass plate is far away from the glass plate.
Between the step 5 and the step 6, the following steps are also included:
Judge whether the collecting bottle is full. When the collecting bottle is not full, return to step S4. When the collecting bottle is full, the lifting system drives the collecting plate to move upward perpendicularly to the sea surface to the highest position, and then execute the step S6.
Fig. 3-9, the sea surface microlayer sampling device which the present invention can realize the method for sampling sea surface microlayer includes an outer case 1, a sampling system, a lifting system, a liquid collecting system, a control system and a suspension system.
Date Recue/Date Received 2022-05-26 The outer case is a box structure, which is used to protect the sampling system and the liquid collection system from wave pollution.
The sampling system includes a collecting plate 3, which is arranged in the outer case 1. The collection plate 3 includes a glass frame 12 and a glass plate 13. The glass plate 13 is fixed on the glass frame 12, and the glass frame 12 wraps edges of the glass plate 13 to protect the glass plate 13.
The lifting system is fixed on the outer case 1, and the collecting plate 3 is arranged on the lifting system through the glass frame 12. The operation of the lifting system can drive the collecting plate 3 to move up and down. A
collecting plate extension hole 9, which is a rectangular through-hole, is set in the bottom plate of the outer case 1. A maximum width and a maximum thickness of the collecting plate 3 are less than a length and a width of the collecting plate extension hole 9, which is convenient for the collecting plate 3 to move outside the outer case 1 through the collecting plate extension hole 9 for sample collection.
The lifting system is a lead screw lifting system. The lead screw lifting system includes a lead screw 7. The lead screw 7 is fixed in a groove at an inner wall of the outer case 1. The lead screw 7 is set along a longitudinal direction of the outer case 1. The inner wall of the outer case 1 is fixed with the track 8. The track 8 is set along the longitudinal direction of the outer case 1. The glass frame 12 is set on the lead screw 7 and leans against the track 8. The motor works to drive the lead screw 7 to rotate, and rotation of the lead screw 7 drives the collecting plate to move up and down along the track 8. Setting the track 8 on the outer case 1 can limit movement directions of the collecting plate 3.
Controlling forward and reverse rotation of the motor can control the rotation direction of the lead screw 7, and further control rise and fall of the collecting plate 3.
Date Recue/Date Received 2022-05-26 The liquid collecting system is arranged on the outer case 1. The liquid collecting system includes a driving mechanism, a liquid collector 5 and a collecting bottle 6. Two liquid collector limit grooves 11 are set on the outer case 1, which are symmetrically arranged on the outer case 1. The liquid collector
When the one or more electromagnets are powered off, the one or more electromagnets lose magnetic force; the one or more magnets are pulled away from the one or more electromagnets by a spring force; movement of the one or more magnets drives the liquid collector to rotate, and makes a side of a top portion of the liquid collecting groove near the glass plate far away from the glass plate.
Preferably, the lifting system is a lead screw lifting system, and the lead screw lifting system comprises at least one lead screw.
Preferably, a control cabin of the control system sends a signal to control rotation of the at least one lead screw and drives the collecting plate to move downward along a track, the control cabin sends a signal to control reverse rotation of the at least one lead screw and drive the collecting plate to move upward along the track, and the control cabin controls turning on and turning off the electromagnets.
Compared with existing methods, the present invention has the following beneficial effects:
The sampling method has reasonable sampling thickness, can match the requirements of researchers with high degree of automation, high sampling quality, excellent stability, and can match the requirements of working under adverse sea states.
The sampling method for sea surface microlayer according to the present Date Recue/Date Received 2022-05-26 invention completes sample collection by setting a lifting system and a driving mechanism. The method is simple and the operation speed is easy to control.
The system includes a collecting plate, and has high automation, high sampling efficiency and ideal sampling thickness. It can match the requirements of scientists, adapt to the adverse sampling environment, and the sampling is authentic and reliable;
Set the side of the top portion of the liquid collecting groove near the glass plate close to the glass plate. During falling of the collecting plate, use the liquid collecting groove to scrape the liquid on the surface of the glass plate. At the same time, during the falling process of the collecting plate, the collecting plate penetrates into the seawater to continue sample collection, so that sampling of the collecting plate and scraping of the liquid collecting groove can be carried out simultaneously, which can simplify the operation steps and have high sampling efficiency;
Set the working position 10-20cm above the sea surface, so that the sampling device is close to the sea surface as much as possible, and because there is an outer case for protection, the waves will not hit the sampling device, waves contaminating the seawater sample can be avoided;
By limiting the lowest position and the highest position of the collecting plate, the liquid collecting groove can be close to the glass plate when rotating during the working process of the collecting plate, so as to prevent the position of the collecting plate from being too high and too low, affecting the relative position of the collecting plate and the liquid collecting groove, and further affecting smooth completion of the collecting work;
Set the collection plate to rise at a uniform speed, which can conduct the collection work smoothly, make a thickness difference between the collected Date Recue/Date Received 2022-05-26 seawater samples small, and can collect the seawater sample matching sampling standards;
The driving mechanism includes electromagnets, magnets and springs.
The electromagnets are configured to generate magnetic force when energized and lose magnetic force when powered off. The magnets are controlled to further control the contact relationship between the liquid collecting groove and the glass plate, which can better control the liquid collecting groove for liquid sample scraping. It has simple structures and involves easy operations;
The lifting system adopts the lead screw lifting system, and the control cabin is configured control the lifting system and the driving mechanism, so that lifting of the collecting plate and rotation of the liquid collecting groove can be done automatically, with a high degree of automation and is easy to control.
Brief description of drawings In order to more clearly explain embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the attached figures which are necessary to be used in the description of the embodiments or the state of art. It is obvious that the attached figures in the following description show only some embodiments of the present invention. For those of ordinary skill in the art, other figures can be obtained according to these figures without paying creative labor.
Figure 1 is a flowchart diagram showing an embodiment of the method for sampling sea surface microlayer disclosed by the present invention;
Figure 2 is a flowchart diagram showing an embodiment of the method for sampling sea surface microlayer disclosed by the present invention;
Figure 3 is an internal assembly drawing of an embodiment of the device for sampling sea surface microlayer disclosed by the invention;
Date Recue/Date Received 2022-05-26 Figure 4 is a structural diagram showing another embodiment of the device for sampling sea surface microlayer disclosed by the present invention;
Figure 5 is a structural diagram of the collecting plate disclosed by the present invention;
Figure 6 is an internal structural diagram of the outer case disclosed by the invention;
Figure 7 is an internal front view of the outer case disclosed by the present invention;
Figure 8 is a structural diagram of the liquid collector disclosed by the present invention;
Figure 9 is an upward view showing another embodiment of the liquid collector disclosed by the present invention.
In the above figures, 1, outer case; 2, lifting ring; 3, collecting plate; 4, control cabin; 5, liquid collector; 6, collecting bottle; 7, lead screw; 8, track; 9, extension hole of the collecting plate; 10, electromagnet; 11, limit groove of liquid collector; 12, glass plate frame; 13, glass plate; 14, magnet; 15, spring; 16, liquid collecting groove; and 17, outlet hole.
Detailed embodiments Next, the present invention will be described in detail through an exemplary embodiment. However, it should be understood that without further description, the elements, structures and features in one embodiment can also be usefully combined with other embodiments.
In the description of the invention, it should be noted that the orientation or position relationship indicated by the terms "inside", "outside", "up", "down", "front", "back", "left", "right" and so on is based on the position relationship shown in the attached figures, only for convenience of describing the present Date Recue/Date Received 2022-05-26 invention and simplifying the description, rather than indicating or implying that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention. In addition, the terms "first", "second"
and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance.
Figure 1, a method for sampling sea surface microlayer includes the following steps:
Step Si: placing the sampling device at the working position above the sea surface.
Specifically, the sampling device is lifted to the working position above the sea surface through a suspender or a folding arm of a ship or other tools.
The working position is determined according to the working condition, making the sampling device as close to the sea surface as possible, and ensuring that the sea waves will not hit the sampling device during the working process to prevent the sea waves from polluting the liquid sample. The working position is 10-20 cm above the sea surface.
Step S2: determining a lowest position, a highest position and an operation speed of the collecting plate.
Specifically, the lowest position and the highest position of the collecting plate are determined according to the relative position of the collecting plate and the liquid collecting groove. The height of the collecting plate is H. When the collecting plate is in the lowest position, the vertical distance from the contact position between the collecting plate and a side of a top portion of the liquid collecting groove near the glass plate to a bottom portion of the collecting plate is D1, 1 / 2H < D1 < H. When the sampling plate is in the highest position, the Date Recue/Date Received 2022-05-26 vertical distance from the contact position between the collecting plate and the side of the top portion of the liquid collecting groove near the glass plate to the top portion of the collection plate is D2, 1 / 2H < D2 < H. The operation speed of the collecting plate is determined according to the thickness to be sampled and the actual sea state. The operation speed is controlled through a control cabin.
The operation speed includes the falling speed and the rising speed of the collecting plate. When the collecting plate rises at a uniform speed, sampling can be done better.
Step S3: the lifting system drives the collecting plate to move downward perpendicularly to the sea surface to the lowest position. When the collecting plate moves to the lowest position, most of the collecting plate is immersed in the sea water.
Specifically, the lifting system is a lead screw lifting system. The lead screw lifting system includes at least one lead screw. A track is arranged on the outer case of the sampling device. The control cabin of the control system sends a signal to control rotation of the lead screw and drive the liquid collecting plate to move downward along the track to the lowest position. The collecting plate extends from the extension hole of the collecting plate at the bottom portion of the outer case and inserts vertically into the seawater. When the collecting plate reaches the lowest position, most of the collecting is immersed in the seawater.
When the collecting plate is vertically inserted into the seawater, sampling can be done better.
Step S4: the lifting system drives the collecting plate to move upward perpendicularly to the sea surface to the highest position. When the collecting plate moves to the highest position, the driving mechanism drives the liquid collecting groove to rotate and make the side of the top portion of the liquid to Date Recue/Date Received 2022-05-26 collecting groove near the glass plate close to the glass plate;
Specifically, the control cabin sends a signal to control the at least one lead screw to rotate reversely to drive the collecting plate to move upward along the track to the highest position. The collecting plate is pulled off from the sea water vertically at a uniform speed, which can better collect samples with thickness matching requirements. The driving mechanism includes electromagnets, magnets and springs. When the collecting plate moves to the highest position, the control cabin controls the electromagnets to be energized.
After the electromagnets are powered on, they generate magnetic force, and the magnets move towards the electromagnets. The magnets move to drive the liquid collector to rotate, making the side of the top portion of the liquid collecting groove near the glass plate to be close to the glass plate.
Step S5: the lifting system drives the collecting plate to move downward to the lowest position perpendicularly to the sea surface. During descending, the side of the top portion of the liquid collecting groove close to the glass plate scrapes liquid on a surface of the glass plate for liquid collection, collects the liquid into the liquid collecting groove, and the liquid in the liquid collecting groove is directed to the collecting bottle;
Specifically, the control cabin of the control system sends a signal to control rotation of the at least one lead screw to drive the collecting plate to move downward to the lowest position. The collecting plate extends from the extension hole of the collecting plate at the bottom portion of the outer case and is vertically inserted into the seawater. During descending, the side at the top portion of the liquid collecting groove to the glass plate scrapes the liquid on the surface of the glass plate for liquid collection. The liquid is collected into the liquid collecting groove. A liquid outlet hole is set on the liquid collecting Date Recue/Date Received 2022-05-26 groove. The collected liquid in the liquid collecting groove flows into the collection bottle through the liquid outlet hole. When the collection plate reaches the lowest position, most of the collecting plate is immersed in seawater;
Step S6: stop sampling.
Specifically, the control cabin controls the sampling device to stop sampling, and the control cabin controls the collecting plate and the liquid collecting groove to return to the state before work.
Figure 2, in the step S5, the steps below are also included:
When the collecting plate moves to the lowest position, the driving mechanism drives the liquid collecting groove to rotate, and makes the side of the top portion of the liquid collecting groove near the glass plate far away from the glass plate.
Specifically, the control cabin controls the electromagnets to power off, the electromagnets lose their magnetic force, the magnets are pulled away from the electromagnets by a spring force, and the magnets move to drive the liquid collector to rotate, so that the side of the top portion of the liquid collecting groove close to the glass plate is far away from the glass plate.
Between the step 5 and the step 6, the following steps are also included:
Judge whether the collecting bottle is full. When the collecting bottle is not full, return to step S4. When the collecting bottle is full, the lifting system drives the collecting plate to move upward perpendicularly to the sea surface to the highest position, and then execute the step S6.
Fig. 3-9, the sea surface microlayer sampling device which the present invention can realize the method for sampling sea surface microlayer includes an outer case 1, a sampling system, a lifting system, a liquid collecting system, a control system and a suspension system.
Date Recue/Date Received 2022-05-26 The outer case is a box structure, which is used to protect the sampling system and the liquid collection system from wave pollution.
The sampling system includes a collecting plate 3, which is arranged in the outer case 1. The collection plate 3 includes a glass frame 12 and a glass plate 13. The glass plate 13 is fixed on the glass frame 12, and the glass frame 12 wraps edges of the glass plate 13 to protect the glass plate 13.
The lifting system is fixed on the outer case 1, and the collecting plate 3 is arranged on the lifting system through the glass frame 12. The operation of the lifting system can drive the collecting plate 3 to move up and down. A
collecting plate extension hole 9, which is a rectangular through-hole, is set in the bottom plate of the outer case 1. A maximum width and a maximum thickness of the collecting plate 3 are less than a length and a width of the collecting plate extension hole 9, which is convenient for the collecting plate 3 to move outside the outer case 1 through the collecting plate extension hole 9 for sample collection.
The lifting system is a lead screw lifting system. The lead screw lifting system includes a lead screw 7. The lead screw 7 is fixed in a groove at an inner wall of the outer case 1. The lead screw 7 is set along a longitudinal direction of the outer case 1. The inner wall of the outer case 1 is fixed with the track 8. The track 8 is set along the longitudinal direction of the outer case 1. The glass frame 12 is set on the lead screw 7 and leans against the track 8. The motor works to drive the lead screw 7 to rotate, and rotation of the lead screw 7 drives the collecting plate to move up and down along the track 8. Setting the track 8 on the outer case 1 can limit movement directions of the collecting plate 3.
Controlling forward and reverse rotation of the motor can control the rotation direction of the lead screw 7, and further control rise and fall of the collecting plate 3.
Date Recue/Date Received 2022-05-26 The liquid collecting system is arranged on the outer case 1. The liquid collecting system includes a driving mechanism, a liquid collector 5 and a collecting bottle 6. Two liquid collector limit grooves 11 are set on the outer case 1, which are symmetrically arranged on the outer case 1. The liquid collector
5 is arranged in the liquid collector limit groove 11 and can rotate relatively to the outer case 1 in the liquid collector limit groove 11. The liquid collecting groove 16, which is arranged in the outer case 1, is set on the liquid collector tank 5.
The liquid collecting groove 16 is arranged on one side of the collecting plate 3.
The liquid collecting tank 16 is arranged along a horizontal direction of the collecting plate 3, and the driving mechanism works to drive the liquid collector to rotate relatively to the outer case 1. When collecting samples, the lifting system drives the collecting plate 3 to extend into the seawater, and then pull it out from the seawater and moves to the highest position. At this time, the liquid collecting groove 16 does not contact the collecting plate 3. The driving mechanism drives the liquid collector 5 to rotate to make the side of the top portion of the liquid collecting groove 16 near the glass plate 13 close to the glass plate 13. The lifting system drives the glass plate 13 to descend, and the side of the top portion of the liquid collecting groove 16 near the glass plate 13 scrapes the liquid on the surface of the glass plate 13 for liquid collection.
The liquid is collected into the liquid collecting groove 16. When the collecting plate 3 penetrates vertically into the seawater and then is drawn out from the seawater at a uniform speed, higher quality sample can be done. The collecting bottle 6 is arranged on the out case 1. The liquid outlet hole 17 is set in the collecting tank 16 to discharge the liquid collected by the collecting tank 16. The liquid outlet hole 17 can be arranged at a bottom portion of the collecting tank 16. The liquid sample in the collecting tank 16 flows into the collecting bottle through the Date Recue/Date Received 2022-05-26 liquid outlet hole 17, and the liquid outlet hole 17 is connected with the collecting bottle 6 through at least one water tube. A depth of the collecting tank 16 decreases from the liquid outlet hole 17 to the direction away from the liquid outlet hole 17, making the liquid outlet hole the lowest point of the liquid collecting groove 16, and facilitating rapid flow of seawater samples into the collecting bottle 6.
The driving mechanism comprises magnets 14, springs 15 and electromagnets 10. The magnets 14 are fixed on the liquid collector 5. The electromagnets 10 are fixed on the inner wall of the outer case 1 and correspond to the magnets 14. One end of the magnets 14 away from the electromagnets are fixedly connected with one end of the springs 15.The other end of the springs are fixed on the inner wall of the outer case 1 opposite to the inner wall of the outer case 10. The springs 15 are detachably connected with the outer case 1 and the magnets 14 to facilitate the spring replacement. The springs 15 can also be hung on the outer case 1 and the magnets 14. When the electromagnets are powered on, the electromagnets 10 generate magnetic force, the magnets 14 move towards the electromagnets 10, and the magnets 14 move to drive the liquid collector 5 to rotate, making the side of the top portion of the liquid collector 16 near the glass plate 13 close to the glass plate 13. When the electromagnets are powered off, the electromagnets 10 lose their magnetic force, the magnets are pulled away from the electromagnets 10 by the elastic force of the springs 15, and the magnets 14 move to drive the liquid collector 5 to rotate, keep the side of the top portion of the liquid collecting tank 16 close to the glass plate 13 away from the glass plate 13, making the side of the top portion of the liquid collecting tank 16 near the glass plate not contact with the glass plate 13, and preventing the glass plate 13 from generating resistance during the rise of the Date Recue/Date Received 2022-05-26 glass plate 13. There are at least one electromagnet 10, at least one magnet and at least one spring 15, which can be two. The two electromagnets 10 are symmetrically arranged on both sides of the collecting plate 3, and the two magnets 14 are symmetrically arranged on both ends of the liquid collector 5.
The two springs 15 are symmetrically arranged on both sides of the collecting plate 3.
The control system includes a control cabin 4, which is electrically connected with the lifting system. The control cabin 4 sends a signal to control the operation of the lifting system. The control cabin can control forward and reverse rotation of the motor which drives the lead screw 7 to rotate, control the rotation direction of the lead screw and further control rise and fall of the collecting plate 3. The control cabin 4 can control the lowest position and the highest position of the operation of the collecting plate. It can also intelligently determine a rising speed and a falling speed of the collecting plate according to the actual sea state, so as to collect seawater samples from sea surface microlayer with a certain thickness. The control cabin 4 is electrically connected with the electromagnets 10, and the control cabin can control the power on and power off of the electromagnets 10.
The suspension system includes a lifting ring 2, which is arranged on the top of the outer case 1 and fixedly connected with the outer case 1. The sea surface microlayer sampling device is connected with the external lifting devices such as suspenders and folding arms through the lifting ring 2 of the suspension system, facilitating to suspend the sea surface layer sampling device to a working position 10-20 cm above the sea surface for sampling. The working position is determined according to the sea state, so that the sampling device can be as close to the sea surface as possible and also avoids the samples polluted by Date Recue/Date Received 2022-05-26 sea waves during the sampling process.
The outer case material can be 316L stainless steel, and the glass frame, the collecting bottle and the liquid collector can be made of non-stick and strong moisture resistance polytetrafluoroethylene (Teflon, PTEF).
The working principles of the sea surface microlayer sampling device are:
The sampling device is lifted to the working position 10-20 cm above the sea surface by the suspension mechanism for sampling;
The control cabin 4 sends a signal to drive the lead screw 7 to rotate. The lead screw 7 drives the collecting plate to move downward along the track 8 to the lowest position. The collecting plate 3 extends from the collecting plate hole 9 under the outer case and penetrates vertically into the seawater. When the collecting plate 3 moves to the lowest position, most of the collecting plate 3 is immersed in the seawater;
The control cabin 4 sends a signal to drive the lead screw 7 to rotate in the reverse direction. The lead screw 7 drives the collecting plate 3 to move upward along the track 8 to the highest position, and the collecting plate is pulled out vertically from the seawater. When the collecting plate moves to the highest position, the control cabin 4 energizes the electromagnets 10. After the electromagnets 10 are powered on, they generate magnetic force to attract the magnets 14 of the liquid collector 5 and drive the liquid collector to rotate, making the side of the liquid collecting groove 16 near the glass plate close to the glass plate;
The control cabin 4 sends a signal to drive the lead screw 7 to rotate, and the lead screw 7 drives the collecting plate to move downward to the lowest position along the track 8. During descending, the seawater on the glass plate is scraped into the liquid collecting groove of the liquid collector by the side of the Date Recue/Date Received 2022-05-26 top portion of the liquid collecting groove 16 near the glass plate 13, and the liquid collecting groove is guided into the collection bottle 6 through the liquid outlet hole 17 and the tube. When the collecting plate moves to the lowest position, the control cabin 4 cuts off the power to the electromagnets 10, and the electromagnets lose their magnetic force. The liquid collector is pulled by the spring 15 to make the liquid collecting groove near the glass plate away from the glass plate;
Judge whether the collecting bottle is full. When the collecting bottle is not full, the control cabin 4 sends a signal to drive the lead screw 7 to rotate reversely and drive the collecting plate 3 to move upward to the highest position.
Repeat the previous operation process for liquid sample collection. If the collecting bottle is full, the control cabin 4 sends a signal to drive the lead screw 7 to rotate reversely and drive the collecting plate 3 to move upward to the highest position, and then stop collection.
The above-mentioned description shows only some preferred embodiments of the present invention and is not a limitation of the present invention. Any one skilled in the art may change or modify the above-mentioned disclosed technical solutions to be equivalent embodiments by making equivalent replacement and apply the same in other fields, but any simple modification, equivalent changes and modifications to the above-mentioned embodiment according to the technical essence of the present invention without departing from the technical scheme of the present invention still belong to the protection scope of the technical scheme of the present invention.
Date Recue/Date Received 2022-05-26
The liquid collecting groove 16 is arranged on one side of the collecting plate 3.
The liquid collecting tank 16 is arranged along a horizontal direction of the collecting plate 3, and the driving mechanism works to drive the liquid collector to rotate relatively to the outer case 1. When collecting samples, the lifting system drives the collecting plate 3 to extend into the seawater, and then pull it out from the seawater and moves to the highest position. At this time, the liquid collecting groove 16 does not contact the collecting plate 3. The driving mechanism drives the liquid collector 5 to rotate to make the side of the top portion of the liquid collecting groove 16 near the glass plate 13 close to the glass plate 13. The lifting system drives the glass plate 13 to descend, and the side of the top portion of the liquid collecting groove 16 near the glass plate 13 scrapes the liquid on the surface of the glass plate 13 for liquid collection.
The liquid is collected into the liquid collecting groove 16. When the collecting plate 3 penetrates vertically into the seawater and then is drawn out from the seawater at a uniform speed, higher quality sample can be done. The collecting bottle 6 is arranged on the out case 1. The liquid outlet hole 17 is set in the collecting tank 16 to discharge the liquid collected by the collecting tank 16. The liquid outlet hole 17 can be arranged at a bottom portion of the collecting tank 16. The liquid sample in the collecting tank 16 flows into the collecting bottle through the Date Recue/Date Received 2022-05-26 liquid outlet hole 17, and the liquid outlet hole 17 is connected with the collecting bottle 6 through at least one water tube. A depth of the collecting tank 16 decreases from the liquid outlet hole 17 to the direction away from the liquid outlet hole 17, making the liquid outlet hole the lowest point of the liquid collecting groove 16, and facilitating rapid flow of seawater samples into the collecting bottle 6.
The driving mechanism comprises magnets 14, springs 15 and electromagnets 10. The magnets 14 are fixed on the liquid collector 5. The electromagnets 10 are fixed on the inner wall of the outer case 1 and correspond to the magnets 14. One end of the magnets 14 away from the electromagnets are fixedly connected with one end of the springs 15.The other end of the springs are fixed on the inner wall of the outer case 1 opposite to the inner wall of the outer case 10. The springs 15 are detachably connected with the outer case 1 and the magnets 14 to facilitate the spring replacement. The springs 15 can also be hung on the outer case 1 and the magnets 14. When the electromagnets are powered on, the electromagnets 10 generate magnetic force, the magnets 14 move towards the electromagnets 10, and the magnets 14 move to drive the liquid collector 5 to rotate, making the side of the top portion of the liquid collector 16 near the glass plate 13 close to the glass plate 13. When the electromagnets are powered off, the electromagnets 10 lose their magnetic force, the magnets are pulled away from the electromagnets 10 by the elastic force of the springs 15, and the magnets 14 move to drive the liquid collector 5 to rotate, keep the side of the top portion of the liquid collecting tank 16 close to the glass plate 13 away from the glass plate 13, making the side of the top portion of the liquid collecting tank 16 near the glass plate not contact with the glass plate 13, and preventing the glass plate 13 from generating resistance during the rise of the Date Recue/Date Received 2022-05-26 glass plate 13. There are at least one electromagnet 10, at least one magnet and at least one spring 15, which can be two. The two electromagnets 10 are symmetrically arranged on both sides of the collecting plate 3, and the two magnets 14 are symmetrically arranged on both ends of the liquid collector 5.
The two springs 15 are symmetrically arranged on both sides of the collecting plate 3.
The control system includes a control cabin 4, which is electrically connected with the lifting system. The control cabin 4 sends a signal to control the operation of the lifting system. The control cabin can control forward and reverse rotation of the motor which drives the lead screw 7 to rotate, control the rotation direction of the lead screw and further control rise and fall of the collecting plate 3. The control cabin 4 can control the lowest position and the highest position of the operation of the collecting plate. It can also intelligently determine a rising speed and a falling speed of the collecting plate according to the actual sea state, so as to collect seawater samples from sea surface microlayer with a certain thickness. The control cabin 4 is electrically connected with the electromagnets 10, and the control cabin can control the power on and power off of the electromagnets 10.
The suspension system includes a lifting ring 2, which is arranged on the top of the outer case 1 and fixedly connected with the outer case 1. The sea surface microlayer sampling device is connected with the external lifting devices such as suspenders and folding arms through the lifting ring 2 of the suspension system, facilitating to suspend the sea surface layer sampling device to a working position 10-20 cm above the sea surface for sampling. The working position is determined according to the sea state, so that the sampling device can be as close to the sea surface as possible and also avoids the samples polluted by Date Recue/Date Received 2022-05-26 sea waves during the sampling process.
The outer case material can be 316L stainless steel, and the glass frame, the collecting bottle and the liquid collector can be made of non-stick and strong moisture resistance polytetrafluoroethylene (Teflon, PTEF).
The working principles of the sea surface microlayer sampling device are:
The sampling device is lifted to the working position 10-20 cm above the sea surface by the suspension mechanism for sampling;
The control cabin 4 sends a signal to drive the lead screw 7 to rotate. The lead screw 7 drives the collecting plate to move downward along the track 8 to the lowest position. The collecting plate 3 extends from the collecting plate hole 9 under the outer case and penetrates vertically into the seawater. When the collecting plate 3 moves to the lowest position, most of the collecting plate 3 is immersed in the seawater;
The control cabin 4 sends a signal to drive the lead screw 7 to rotate in the reverse direction. The lead screw 7 drives the collecting plate 3 to move upward along the track 8 to the highest position, and the collecting plate is pulled out vertically from the seawater. When the collecting plate moves to the highest position, the control cabin 4 energizes the electromagnets 10. After the electromagnets 10 are powered on, they generate magnetic force to attract the magnets 14 of the liquid collector 5 and drive the liquid collector to rotate, making the side of the liquid collecting groove 16 near the glass plate close to the glass plate;
The control cabin 4 sends a signal to drive the lead screw 7 to rotate, and the lead screw 7 drives the collecting plate to move downward to the lowest position along the track 8. During descending, the seawater on the glass plate is scraped into the liquid collecting groove of the liquid collector by the side of the Date Recue/Date Received 2022-05-26 top portion of the liquid collecting groove 16 near the glass plate 13, and the liquid collecting groove is guided into the collection bottle 6 through the liquid outlet hole 17 and the tube. When the collecting plate moves to the lowest position, the control cabin 4 cuts off the power to the electromagnets 10, and the electromagnets lose their magnetic force. The liquid collector is pulled by the spring 15 to make the liquid collecting groove near the glass plate away from the glass plate;
Judge whether the collecting bottle is full. When the collecting bottle is not full, the control cabin 4 sends a signal to drive the lead screw 7 to rotate reversely and drive the collecting plate 3 to move upward to the highest position.
Repeat the previous operation process for liquid sample collection. If the collecting bottle is full, the control cabin 4 sends a signal to drive the lead screw 7 to rotate reversely and drive the collecting plate 3 to move upward to the highest position, and then stop collection.
The above-mentioned description shows only some preferred embodiments of the present invention and is not a limitation of the present invention. Any one skilled in the art may change or modify the above-mentioned disclosed technical solutions to be equivalent embodiments by making equivalent replacement and apply the same in other fields, but any simple modification, equivalent changes and modifications to the above-mentioned embodiment according to the technical essence of the present invention without departing from the technical scheme of the present invention still belong to the protection scope of the technical scheme of the present invention.
Date Recue/Date Received 2022-05-26
Claims (10)
1. A method for sampling a sea surface microlayer, comprising the following steps:
step Sl: placing a sampling device at a working position above a sea surface;
step S2: determining a lowest position, a highest position and an operation speed of a collecting plate;
step S3: driving with a lifting system the collecting plate to move downward perpendicularly to the sea surface to the lowest position; when the collecting plate moves to the lowest position, a glass plate is immersed in the seawater;
step S4: driving with the lifting system the collecting plate to move upward perpendicularly to the sea surface to the highest position; when the collecting plate moves to the highest position, a driving mechanism drives a liquid collecting tank to rotate and draws a side of a top portion of the liquid collecting tank that is adjacent the glass plate into a position that is close to the glass plate relative to an original position of the side of the top portion of the liquid collecting tank prior to rotation;
step S5: driving with the lifting system the collecting plate to move downward to the lowest position perpendicularly to the sea surface; during descending, the side of the top portion of the liquid collecting tank close to the glass plate scrapes liquid on a surface of the glass plate for liquid collection, collects the liquid into the liquid collecting tank, and directs the liquid in the liquid collecting tank to a collecting bottle; and step S6: stopping sampling.
step Sl: placing a sampling device at a working position above a sea surface;
step S2: determining a lowest position, a highest position and an operation speed of a collecting plate;
step S3: driving with a lifting system the collecting plate to move downward perpendicularly to the sea surface to the lowest position; when the collecting plate moves to the lowest position, a glass plate is immersed in the seawater;
step S4: driving with the lifting system the collecting plate to move upward perpendicularly to the sea surface to the highest position; when the collecting plate moves to the highest position, a driving mechanism drives a liquid collecting tank to rotate and draws a side of a top portion of the liquid collecting tank that is adjacent the glass plate into a position that is close to the glass plate relative to an original position of the side of the top portion of the liquid collecting tank prior to rotation;
step S5: driving with the lifting system the collecting plate to move downward to the lowest position perpendicularly to the sea surface; during descending, the side of the top portion of the liquid collecting tank close to the glass plate scrapes liquid on a surface of the glass plate for liquid collection, collects the liquid into the liquid collecting tank, and directs the liquid in the liquid collecting tank to a collecting bottle; and step S6: stopping sampling.
2. The method for sampling a sea surface microlayer according to claim 1, wherein in the step Sl, the working position is 10-20 cm above the sea surface.
Date Recue/Date Received 2023-07-26
Date Recue/Date Received 2023-07-26
3. The method for sampling a sea surface microlayer according to claim 1, wherein in the step S2, a height of the collecting plate is H, when the collecting plate is in the lowest position, a vertical distance from a contact position between the collecting plate and the side of the top portion of the liquid collecting tank adjacent to the glass plate to a bottom portion of the collecting plate is D1, 1 / 2H < D1 < H; and when the collecting plate is in the highest position, the vertical distance from the contact position between the collecting plate and the side of the top portion of the liquid collecting tank adjacent to the glass plate to the bottom portion of the collecting plate is D2, 1 / 2H < D2 < H.
4. The method for sampling a sea surface microlayer according to claim 1, wherein in the step S2, the operation speed includes a rising speed and a falling speed of the collecting plate.
5. The method for sampling a sea surface microlayer according to claim 4, wherein the collecting plate rises at a uniform speed.
6. The method for sampling a sea surface microlayer according to claim 1, wherein the step 5 further comprises the following steps:
when the collecting plate moves to the lowest position, the driving mechanism drives the liquid collecting tank to rotate, such that the top portion of the side of the liquid collecting tank moves back toward the original position thereof .
when the collecting plate moves to the lowest position, the driving mechanism drives the liquid collecting tank to rotate, such that the top portion of the side of the liquid collecting tank moves back toward the original position thereof .
7. The method for sampling a sea surface microlayer according to claim 6, wherein between the step 5 and the step 6, the following steps are also included:
judging whether the collecting bottle is full; when the collecting bottle is not full, returning to the step S4; when the collecting bottle is full, driving with the lifting system the collecting plate to move upward perpendicularly to the sea Date Recue/Date Received 2023-07-26 surface to the highest position, and then executing the step S6.
judging whether the collecting bottle is full; when the collecting bottle is not full, returning to the step S4; when the collecting bottle is full, driving with the lifting system the collecting plate to move upward perpendicularly to the sea Date Recue/Date Received 2023-07-26 surface to the highest position, and then executing the step S6.
8. The method for sampling a sea surface microlayer according to any one of claims 1-7, wherein the driving mechanism comprises one or more electromagnets, one or more magnets and one or more springs;
when the one or more electromagnets are powered on, the one or more electromagnets generate magnetic attraction after being energized to make the one or more magnets move towards the one or more electromagnets, and the one or more magnets move to drive the liquid collecting tank to rotate, such that the side of the top portion of the liquid collecting tank that is adjacent to the glass plate moves toward the glass plate;
when the one or more electromagnets are powered off, the one or more electromagnets lose magnetic force thereof; the one or more magnets are pulled away from the one or more electromagnets by the spring force; movements of the one or more magnets drive the liquid collecting tank to rotate, such that the side of the top portion of the liquid collecting tank that is adjacent to the glass plate moves away the glass plate.
when the one or more electromagnets are powered on, the one or more electromagnets generate magnetic attraction after being energized to make the one or more magnets move towards the one or more electromagnets, and the one or more magnets move to drive the liquid collecting tank to rotate, such that the side of the top portion of the liquid collecting tank that is adjacent to the glass plate moves toward the glass plate;
when the one or more electromagnets are powered off, the one or more electromagnets lose magnetic force thereof; the one or more magnets are pulled away from the one or more electromagnets by the spring force; movements of the one or more magnets drive the liquid collecting tank to rotate, such that the side of the top portion of the liquid collecting tank that is adjacent to the glass plate moves away the glass plate.
9. The method for sampling a sea surface microlayer according to any one of claims 1-7, wherein the lifting system is a lead screw lifting system, and the lead screw lifting system comprises at least one lead screw.
10.The method for sampling a sea surface microlayer according to claim 9, wherein a control cabin of a control system sends a signal to control rotation of the at least one lead screw and drives the collecting plate to move downward along a track, the control cabin sends a signal to control reverse rotation of the at least one lead screw and drives the collecting plate to move upward along the track, and the control cabin controls turning on and turning off the electromagnets.
Date Recue/Date Received 2023-07-26
Date Recue/Date Received 2023-07-26
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010213250.9 | 2020-03-24 | ||
| CN202010213250.9A CN111504723B (en) | 2020-03-24 | 2020-03-24 | Ocean micro-surface layer sampling method |
| PCT/CN2021/079960 WO2021190303A1 (en) | 2020-03-24 | 2021-03-10 | Method for sampling sea surface microlayer |
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| CA3162937C true CA3162937C (en) | 2024-01-16 |
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| CN (1) | CN111504723B (en) |
| CA (1) | CA3162937C (en) |
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| CN111504723B (en) * | 2020-03-24 | 2021-10-19 | 青岛海洋科学与技术国家实验室发展中心 | Ocean micro-surface layer sampling method |
| CN113358411B (en) * | 2021-06-08 | 2023-04-07 | 天津大学 | Sampling device for sampling ship to acquire ocean micro-surface layer |
| CN115290542B (en) * | 2022-07-12 | 2023-05-23 | 深圳中氟科技有限公司 | Test system for insulating coating performance |
| CN115468806B (en) * | 2022-09-28 | 2024-01-12 | 山东省海洋资源与环境研究院(山东省海洋环境监测中心、山东省水产品质量检验中心) | Seawater collecting and processing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1357750A1 (en) * | 1985-07-25 | 1987-12-07 | Институт Океанологии Им.П.П.Ширшова | Method and device for sampling liquid surface microlayer |
| SU1375974A1 (en) * | 1985-12-03 | 1988-02-23 | Государственный Океанографический Институт | Device for sampling water from surface microlayer |
| CN204594737U (en) * | 2015-04-16 | 2015-08-26 | 中国科学院广州地球化学研究所 | Water body microlayer pollutant harvester |
| CN104807673B (en) * | 2015-04-16 | 2018-10-19 | 中国科学院广州地球化学研究所 | Water body microlayer pollutes matter collection device |
| CN105181399B (en) * | 2015-09-30 | 2017-09-19 | 国家海洋局第三海洋研究所 | Marine aerosol harvester and its method for sampling on marine marker carrier |
| CN109470519A (en) * | 2018-11-19 | 2019-03-15 | 镇江市丹徒区江南玻璃仪器厂 | A kind of sampler manufacturing glass |
| CN210071393U (en) * | 2019-04-15 | 2020-02-14 | 生态环境部华南环境科学研究所 | Screen cloth formula water micro-surface layer sample thief with folding function |
| CN110160840A (en) * | 2019-05-27 | 2019-08-23 | 中国科学院南海海洋研究所 | A kind of glass plate sampler and its method of sampling for collecting microlayer water sample |
| CN110823622B (en) * | 2019-11-27 | 2022-01-14 | 江苏省淡水水产研究所 | Water body micro-surface layer floating object sampling device and sampling method |
| CN111504723B (en) * | 2020-03-24 | 2021-10-19 | 青岛海洋科学与技术国家实验室发展中心 | Ocean micro-surface layer sampling method |
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| CN111504723B (en) | 2021-10-19 |
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