Seawater quality on-line monitoring device and monitoring method

Abstract

The invention discloses a seawater quality on-line monitoring device and a monitoring method, and relates to the technical field of water quality monitoring. Comprising a detection cabin, the top of the detection cabin is fixedly connected with a fixed seat in a penetrating mode, a water quality monitor is installed in a blocking cover at the bottom of the fixed seat, a first elastic telescopic rod is fixedly installed at the center of the fixed seat, and a partition plate is fixed to the movable end of the first elastic telescopic rod; a triggering assembly is arranged between the sliding rod and the inner bottom wall of the detection cabin, and a sealing plate is fixed to the right end of the sliding rod. By arranging the adjusting assembly, the detection depth can be automatically adjusted according to the flow velocity of seawater, it is ensured that obtained data can represent the real characteristics of disturbed water masses, by arranging the detection cabin, the water inlet, the sealing plate and the triggering assembly, sampling and isolation detection are conducted on a water body at the specific depth, and reading is stable; and the water quality detection sensor is in a closed dry environment in a non-detection period.

Description

Technical Field

[0001] This invention relates to the field of water quality monitoring technology, specifically to an online seawater quality monitoring device and method. Background Technology

[0002] Online monitoring of seawater quality is of great significance for marine environmental protection, resource development, and scientific research. Currently, the commonly used monitoring methods are mainly divided into two categories: one is to fix sensors directly to the surface buoy or mooring for continuous observation; the other is to use profiling devices to perform multi-point sampling in the vertical direction.

[0003] However, existing devices still have some shortcomings in use. For example, traditional profile monitoring devices usually sample at preset fixed depth intervals. When encountering strong ocean currents that cause water disturbance and deepening, they still sample at the preset depth. The data obtained is difficult to accurately reflect the true water quality characteristics of the disturbed water mass. Long-term contact between the sensor and seawater can easily lead to problems such as marine organism attachment and sensor surface contamination, which affect measurement accuracy and shorten the sensor's lifespan.

[0004] To address the aforementioned issues, innovative designs are urgently needed based on existing approaches. Summary of the Invention

[0005] The purpose of this invention is to provide an online seawater quality monitoring device and method to solve the problems mentioned in the background. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an online seawater quality monitoring device, comprising a detection chamber, a fixed base fixedly connected through the top of the detection chamber, a water quality monitor installed inside a baffle at the bottom of the fixed base, a first elastic telescopic rod fixedly installed at the center of the fixed base, a partition fixedly attached to the movable end of the first elastic telescopic rod, the partition slidingly connected through the water quality monitor and the baffle at the bottom of the fixed base, and a sliding rod laterally slidably connected to the bottom wall of the detection chamber via a bracket and a spring, with a contact point provided between the sliding rod and the bottom wall of the detection chamber. The component includes a sliding rod with a sealing plate fixed to its right end. A water inlet is located at the bottom of the detection chamber corresponding to the sealing plate. A micro pump is installed at the bottom front side of the detection chamber, with its inlet connected to the interior of the chamber. The sliding rod passes through the inner wall of the detection chamber and is fixed to a mounting plate. A guide rod is fixed to the mounting plate, and multiple adjustment components are mounted on the guide rod. Each adjustment component has a first magnetic block. A compression cylinder is fixed to the left side of the detection chamber via a bracket. A plug is slidably limited inside the compression cylinder, and a second magnetic block is fixed to the bottom of the plug.

[0007] Preferably, the compression cylinder has an open bottom design, and the polarity of the second magnetic block and the plurality of first magnetic blocks on opposite sides is set to be the same.

[0008] Preferably, each of the adjustment components includes a stop block and two second elastic telescopic rods. The stop block is slidably connected to a guide rod. The first magnetic block is embedded and fixed in the side wall of the stop block. The movable ends of the two second elastic telescopic rods are connected to the top of the stop block. The fixed ends of the two second elastic telescopic rods are fixedly connected to a mounting plate. Both the front and rear ends of the stop block are movably connected to float plates through ball joints, and the ball joints are fixed by screws.

[0009] Preferably, the float plate has an airfoil-shaped structure, and the plurality of abutments are arranged vertically along the guide rod, with the spacing between the plurality of abutments decreasing sequentially from bottom to top.

[0010] Preferably, the lengths of the plurality of second elastic telescopic rods decrease sequentially from bottom to top, and the stiffness coefficient of the springs built into each second elastic telescopic rod increases sequentially.

[0011] Preferably, the triggering component includes a ratchet and two mounting blocks. The ratchet is rotatably and sealed to the bottom wall of the detection chamber via a rotating shaft. The two mounting blocks are centrally symmetrically distributed on both sides of the ratchet. One mounting block is fixedly connected to the bottom wall of the detection chamber, and the other mounting block is fixedly connected to a slide rod via a sleeve. Each mounting block has a groove on the side near the ratchet. A wedge block is slidably connected inside each groove via a spring. Both wedge blocks unidirectionally rotate and abut against the ratchet. A pressure sensor is fixedly inserted through each groove.

[0012] Preferably, the bottom end of the ratchet shaft extends through to the outside of the detection chamber, and multiple brushes are fixedly installed on the side wall of the bottom end of the ratchet shaft.

[0013] Preferably, the method includes the following steps: S1: Suspend the detection cabin on the buoy winch and lower it along the anchor rope to the sea area to be measured; S2: When lowered to the preset depth, the water pressure makes the second magnetic block face the first magnetic block, and the magnetic repulsion causes the slide bar to move to the right to open the sealing plate and trigger the pressure sensor. Seawater flows into the detection chamber and is detected by the water quality monitor. S3: After the test is completed, the slide bar moves to the left to reset, the sealing plate closes the water inlet, and the slide bar moves to the left to trigger another pressure sensor on the wedge block of the mounting block, which starts the micro pump to discharge seawater from the chamber; S4: The device continues to be lowered, and steps S2 to S4 are repeated to perform sequential depth detection. The detection data is then transmitted back through the communication equipment carried on the sea surface buoy for online monitoring. S5: When the surface ocean current velocity increases, the float moves the abutment block upward, raising the trigger position of the corresponding first magnetic block. The device needs to be lowered to a deeper water layer to trigger the water ingress detection.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention, by setting an adjustment component, can automatically adjust the detection depth according to the seawater flow velocity. When the ocean current causes the flow velocity to increase, the wing-shaped float generates lift in the flow field, which drives the abutment block to overcome the elastic force of the second elastic telescopic rod and move upward, causing the corresponding first magnetic block trigger position to rise. Therefore, the device needs to be lowered to a deeper water layer to trigger the water ingress detection, ensuring that the obtained data can represent the true characteristics of the disturbed water mass.

[0015] This invention achieves sampling and isolated detection of water at specific depths by setting up a detection chamber, water inlet, sealing plate, and triggering component, resulting in stable detection readings. The water inlet is opened only during detection, and the water quality detection sensor is activated by the triggering component. After the detection is completed, the water inlet is immediately closed and the detection chamber is emptied, so that the water quality detection sensor is in a closed and dry environment during non-detection periods. This avoids problems such as long-term attachment of marine organisms and contamination of the sensor surface, thereby improving the measurement accuracy and service life of the sensor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the internal structure of the detection chamber portion of the present invention; Figure 3 for Figure 2 Enlarged schematic diagram of part A of the structure; Figure 4 This is a schematic diagram of the structure of the fixing base part of the present invention; Figure 5 This is a schematic diagram of the slide bar portion of the present invention; Figure 6 This is a structural schematic diagram of the bottom of the detection chamber of the present invention; Figure 7 This is a schematic diagram of the structure of the adjustment component of the present invention; Figure 8 This is a schematic diagram of the internal structure of the compression cylinder of the present invention; Figure 9 This is a schematic diagram of the trigger component from the bottom view of the present invention; Figure 10 This is a schematic diagram of the mounting block portion of the present invention; Figure 11 This is a schematic diagram showing the connection of the compression cylinder, mounting plate, and slide bar of the present invention.

[0017] In the diagram: 1. Detection chamber; 2. Fixing base; 3. Water quality monitor; 4. First elastic telescopic rod; 5. Partition plate; 6. Slide rod; 7. Trigger assembly; 71. Ratchet; 72. Mounting block; 73. Sleeve; 74. Slide groove; 75. Wedge block; 76. Pressure sensor; 8. Sealing plate; 9. Inlet; 10. Mounting plate; 11. Guide rod; 12. Adjustment assembly; 121. Abutment block; 122. Second elastic telescopic rod; 123. Float plate; 13. First magnetic block; 14. Compression cylinder; 15. Plug; 16. Second magnetic block; 17. Micro pump; 18. Brush. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1 to 11This invention provides a technical solution: an online seawater quality monitoring device, comprising a detection chamber 1, which is connected to a winch mounted on a sea surface buoy via a rope. The right side of the detection chamber 1 is slidably fitted onto the anchor rope of the buoy via a sliding sleeve. A fixed base 2 is fixedly connected through the top of the detection chamber 1. A water quality monitor 3 is installed inside the bottom cover of the fixed base 2, used to detect the pH value, heavy metals, and microbial indicators of the seawater, which is existing technology. A first elastic telescopic rod 4 is fixedly installed at the center of the fixed base 2. A partition 5 is fixed to the movable end. The partition 5 is slidably connected to the water quality monitor 3 and the bottom cover of the fixed base 2. The initial position of the partition 5 is in the middle of the inside of the detection chamber 1. When the partition 5 moves down, the first elastic telescopic rod 4 generates an upward pulling force on the partition 5. A sliding rod 6 is slidably connected to the bottom wall of the detection chamber 1 through a bracket and a spring. A trigger component 7 is set between the sliding rod 6 and the bottom wall of the detection chamber 1. A sealing plate 8 is fixed to the right end of the sliding rod 6. A water inlet 9 is opened at the bottom of the detection chamber 1 corresponding to the position of the sealing plate 8. A micro pump is installed at the bottom front side of the detection chamber 1. 17. The inlet of the micro pump 17 is connected to the interior of the detection chamber 1. The micro pump 17 and the water quality monitor 3 are started by electrical connection with the trigger component 7. The left end of the slide rod 6 passes through the inner wall of the detection chamber 1 and is fixed with a mounting plate 10. A guide rod 11 is fixed on the mounting plate 10. Multiple adjustment components 12 are set on the guide rod 11. Each adjustment component 12 is equipped with a first magnetic block 13. Multiple first magnetic blocks 13 are set according to the linear relationship between seawater pressure and depth, so that the device can detect at a predetermined depth. When encountering ocean currents, the seawater flow rate is reduced. When the surface water is larger, the disturbance will propagate deeper downwards. At this time, the position of multiple first magnetic blocks 13 can be adjusted by adjusting component 12, thereby increasing the detection depth. This allows the water quality monitor 3 to measure data that is more representative of the main fluid movement and water mass characteristics. A compression cylinder 14 is fixed to the left side of the detection chamber 1 by a bracket. A plug 15 is slidably limited inside the compression cylinder 14. A second magnetic block 16 is fixed to the bottom of the plug 15. The second magnetic block 16 is moved to the opposite position of multiple first magnetic blocks 13 by the movement of the plug 15 inside the compression cylinder 14.

[0020] The compression cylinder 14 has an open bottom design. When the device is lowered into seawater, the water pressure pushes the plug 15 and the second magnetic block 16 upward, which compresses the gas inside the compression cylinder 14. The polarity of the second magnetic block 16 and the multiple first magnetic blocks 13 on opposite sides is set to be the same. When the second magnetic block 16 is directly opposite the first magnetic block 13 at the corresponding position, the magnetic repulsion causes the mounting plate 10 to move to the right, and drives the slide rod 6 to move to the right in sync, so that the sealing plate 8 is misaligned with the water inlet 9. At this time, the water inlet 9 is connected to the inside of the detection chamber 1.

[0021] Each adjustment component 12 includes a stop block 121 and two second elastic telescopic rods 122. The stop block 121 is slidably connected to the guide rod 11. The first magnetic block 13 is embedded and fixed in the side wall of the stop block 121. The movable ends of the two second elastic telescopic rods 122 are connected to the top of the stop block 121, and the fixed ends of the two second elastic telescopic rods 122 are fixedly connected to the mounting plate 10. When there is no external force, the elasticity of the second elastic telescopic rods 122 keeps the stop block 121 at the set height. The front and rear ends of the stop block 121 are movably connected to float plates 123 through ball joints. The ball joints are fixed by screws. When the seawater flow velocity increases, the float plates 123 drive the stop block 121 to overcome the elastic force of the second elastic telescopic rods 122 and move upward, so that the first magnetic block 13 is higher than the initial position. At this time, the plug 15 inside the compression cylinder 14 needs to be displaced upward a greater distance so that the second magnetic block 16 is aligned with the first magnetic block 13. That is, water intake detection is only performed when the device is lowered to a deeper position.

[0022] The float 123 has an airfoil-like structure. When it encounters ocean currents that increase the seawater flow velocity, the float 123 uses the airfoil-like structure to create different seawater flow velocities on the upper and lower sides, thereby causing the abutment block 121 to rise. Multiple abutment blocks 121 are arranged vertically along the guide rod 11, and the spacing between the multiple abutment blocks 121 decreases sequentially from bottom to top. When the monitoring device performs detection at certain intervals, the higher the plug 15 is inside the compression cylinder 14, the more difficult it is for the gas to be compressed, and the greater the gas resistance experienced by the plug 15. The sequentially decreasing intervals ensure that the depth to which the device descends during each detection tends to be consistent.

[0023] The lengths of the multiple second elastic telescopic rods 122 decrease sequentially from bottom to top. The specific lengths are set according to the initial intervals of the multiple abutment blocks 121, and the stiffness coefficient of the springs built into each second elastic telescopic rod 122 increases sequentially, so that the upper abutment block 121 represents the same depth change with a smaller displacement.

[0024] Specifically, during use, the detection chamber 1 is suspended from the buoy winch by ropes and lowered along the anchor rope. When it is lowered to the shallow, preset detection depth, seawater applies pressure through the bottom opening of the compression cylinder 14, pushing the plug 15 and the second magnetic block 16 upwards to overcome the gas resistance inside the cylinder. When the second magnetic block 16 rises to a position directly opposite the lowest point of the first magnetic block 13, the repulsive force generated by their magnetic repulsion pushes the mounting plate 10, causing it to move the sliding rod 6 to the right. This further causes the sealing plate 8 to misalign with the inlet 9, allowing seawater to flow into the detection chamber 1 through the inlet 9. Inside, the water quality monitor 3 performs multi-index detection on the incoming seawater. After the detection is completed, the device continues to be lowered. After the second magnetic block 16 and the first magnetic block 13 are misaligned, the sealing plate 8 drives the sliding rod 6 to reset and re-close the water inlet 9. The water in the detection chamber 1 is discharged through the micro pump 17, making the inside of the detection chamber 1 negative pressure. At this time, the partition 5 moves down and stretches the built-in spring of the first elastic telescopic rod 4, preparing for the next depth detection. At the next detection position, when the water inlet 9 is opened, the partition 5 resets and generates suction, which, together with the pressure difference inside and outside the detection chamber 1, enables rapid water intake into the detection chamber 1.

[0025] Furthermore, when the surface ocean current velocity increases, the depth of water flow disturbance increases. The wing-shaped float 123 generates lift in the flow field, causing the abutment block 121 to overcome the elastic force of the corresponding second elastic telescopic rod 122 and move upward, raising the trigger position of the first magnetic block 13. At this time, the second magnetic block 16 needs to rise a greater distance with the plug body 15, meaning the device needs to be lowered to a deeper water layer to directly trigger water intake. This achieves adaptive increase in detection depth, making the measurement data more representative of the characteristics of disturbed deep water masses. During the descent of the device, the water pressure increases linearly with depth, but the gas in the compression cylinder 14 increases resistance due to gradual compression, reducing the displacement of the plug body 15 per unit depth. By setting the spacing of the multiple abutment blocks 121 to decrease sequentially from bottom to top, and correspondingly setting the length of the second elastic telescopic rod 122 to decrease and the stiffness coefficient to increase, the depth interval of the device descent during each trigger detection remains basically consistent, ensuring the uniformity and comparability of the detection data on the vertical profile.

[0026] The trigger assembly 7 includes a ratchet 71 and two mounting blocks 72. The ratchet 71 is rotatably and sealed to the inner bottom wall of the detection chamber 1 via a rotating shaft. The two mounting blocks 72 are centrally symmetrically distributed on both sides of the ratchet 71. One mounting block 72 is fixedly connected to the inner bottom wall of the detection chamber 1, and the other mounting block 72 is fixedly connected to the slide rod 6 via a sleeve 73. Each mounting block 72 has a groove 74 on the side near the ratchet 71. A wedge block 75 is slidably connected inside each groove 74 via a spring. Both wedge blocks 75 are in unidirectional rotational contact with the ratchet 71. A pressure sensor 76 is fixedly fixed inside each groove 74. When the slide rod 6 moves to the right to open the water inlet 9, the slide rod 6 drives the mounting block 72 connected to it to move through the sleeve 73. The wedge block 75 on this mounting block 72 is connected to the ratchet 71 through its vertical surface. The vertical surfaces of the ratchet 71 and the screw rod 72 abut against each other, thereby driving the ratchet 71 to rotate. In this rotational direction, the wedge block 75 on the other mounting block 72 abuts against the inclined surface of the ratchet 71 through its inclined surface. The wedge block 75 on the other mounting block 72 is squeezed and slides into the slide groove 74, triggering the pressure sensor 76. At this time, the water quality monitor 3 is turned on to detect the seawater entering the detection chamber 1. When the slide rod 6 is reset, the mounting block 72 connected to the sleeve 73 moves to the left and resets synchronously. The wedge block 75 on this mounting block 72 abuts against the inclined surface of the ratchet 71 through its inclined surface. The wedge block 75 is pressed and slides into the slide groove 74, triggering the pressure sensor 76. At this time, the micro pump 17 is turned on to drain the water in the detection chamber 1. The wedge block 75 on the other mounting block 72 abuts against the vertical surface of the ratchet 71 through its vertical surface, preventing the ratchet 71 from reversing.

[0027] The bottom end of the ratchet 71's shaft extends to the outside of the detection chamber 1. Multiple brushes 18 are fixedly installed on the side wall of the bottom end of the ratchet 71's shaft, so that each time the ratchet 71 rotates, it drives the brushes 18 to clean the water inlet 9.

[0028] Specifically, the sliding rod 6 moves to the right, synchronously driving the mounting block 72 fixed to it via the sleeve 73 to move to the right. The wedge block 75 in the groove 74 of the mounting block 72 abuts against the vertical surface of the teeth of the ratchet 71 with its vertical surface, thereby pushing the ratchet 71. During this rotation, the mounting block 72 fixed to the bottom wall of the detection chamber 1, through the inclined surface of the wedge block 75, unidirectionally rotates and abuts against the inclined surface of the teeth of the rotating ratchet 71. The wedge block 75 is pressed and retracts into the groove 74 against the spring force. Its end triggers the pressure sensor 76 inside the groove 74. After the pressure sensor 76 is triggered, the water quality monitor 3 is turned on. After the water quality monitor 3 is turned on for a period of time, it is turned off. The seawater sample that has flowed into the detection chamber 1 is tested online for indicators such as pH value, heavy metals, and microorganisms. At the same time, the rotation of the ratchet 71 drives multiple brushes 18 fixed to the bottom of its rotating shaft to rotate synchronously, brushing the inlet 9 and its surrounding area in the open state to prevent algae, flocculent matter, etc. from clogging or adhering. When the depth test is completed, as the device continues to be lowered or raised, the slide bar 6 moves to the left and resets under the action of the spring, causing the sealing plate 8 to re-close the water inlet 9. When the slide bar 6 moves to the left, the mounting block 72 fixed to it moves to the left simultaneously. The wedge block 75 on the mounting block 72 abuts against the inclined surface of the ratchet 71 teeth and is pressed back into the slide groove 74, triggering the pressure sensor 76 inside. The triggered pressure sensor 76 then turns on the micro pump 17. After the micro pump 17 has been running for a period of time, it turns off, pumping out and emptying the seawater in the chamber that has completed the test. When the slide bar 6 resets and moves to the left, and the ratchet 71 may reverse due to external forces such as water flow, the wedge block 75 fixed to the bottom wall of the test chamber 1 abuts against the vertical surface of the ratchet 71 teeth, effectively preventing the ratchet 71 from rotating in the opposite direction, ensuring the strict sequence of the triggering logic and the reliability of the device's operation.

[0029] As one embodiment of the present invention, the method includes the following steps: S1: Suspend the detection cabin 1 on the buoy winch and lower it along the anchor rope to the sea area to be measured; S2: When the water is lowered to the preset depth, the water pressure makes the second magnetic block 16 face the first magnetic block 13. The magnetic repulsion causes the slide rod 6 to move to the right to open the sealing plate 8 and trigger the pressure sensor 76. Seawater flows into the detection chamber 1 and is detected by the water quality monitor 3. S3: After the test is completed, slide bar 6 moves to the left to reset, sealing plate 8 closes water inlet 9, slide bar 6 moves to the left to trigger wedge block 75 of mounting block 72 to trigger another pressure sensor 76, start micro pump 17 to discharge seawater from the cabin; S4: The device continues to be lowered, and steps S2 to S4 are repeated to perform sequential depth detection. The detection data is then transmitted back through the communication equipment carried on the sea surface buoy for online monitoring. S5: When the surface ocean current velocity increases, the float 123 drives the block 121 to move upward, which raises the trigger position of the corresponding first magnetic block 13. The device needs to be lowered to a deeper water layer to trigger the water ingress detection.

[0030] Working principle: During use, the detection chamber 1 is suspended from the winch of the buoy on the sea surface by a rope and lowered to the predetermined sea area along the anchor rope. When it is lowered to the preset shallow first detection depth, the seawater applies pressure to the plug body 15 through the opening at the bottom of the compression cylinder 14, pushing the plug body 15 and the second magnetic block 16 to overcome the resistance of the gas inside the compression cylinder 14 and move upward. When the second magnetic block 16 rises to the position directly opposite the lowest first magnetic block 13, it pushes the mounting plate 10 through magnetic repulsion, causing it to drive the slide rod 6 to move to the right, thereby causing the sealing plate 8 to be misaligned with the water inlet 9, and the seawater flows into the interior of the detection chamber 1 through the water inlet 9. When the slide bar 6 moves to the right, it drives the mounting block 72 fixed to it to move to the right synchronously through the sleeve 73. The wedge block 75 in the groove 74 of the mounting block 72 abuts against the vertical surface of the teeth of the ratchet 71 with its vertical surface, pushing the ratchet 71 to rotate. During the rotation of the ratchet 71, the wedge block 75 in the groove 74 of another mounting block 72 fixed to the bottom wall of the detection chamber 1 abuts against the inclined surface of the teeth of the ratchet 71 with its inclined surface in one direction and is pressed back into the groove 74, triggering the pressure sensor 76 inside and starting the water quality monitor 3 to perform online detection of indicators such as pH value, heavy metals, and microorganisms on the seawater sample flowing into the detection chamber 1.

[0031] When the detection chamber 1 completes the current depth detection and prepares to enter the next depth, the slide bar 6 moves to the left and resets under the action of the spring, causing the sealing plate 8 to re-close the water inlet 9. When the slide bar 6 moves to the left, the mounting block 72 fixed to it moves to the left simultaneously. The wedge block 75 on it abuts against the inclined surface of the ratchet 71 teeth and is pressed back into the slide groove 74, triggering the pressure sensor 76 inside. The pressure sensor 76 triggered this time then starts the micro pump 17, pumping out and emptying the seawater in the chamber that has completed the detection.

[0032] When the seawater flow velocity increases due to the influence of ocean currents, the depth of water flow disturbance increases. At this time, the wing-shaped float 123 generates lift in the flow field, causing the connected abutment block 121 to overcome the elastic force of the corresponding second elastic telescopic rod 122 and move upward. This raises the trigger height of the first magnetic block 13 at this position. Correspondingly, the second magnetic block 16 needs to rise a greater distance with the plug body 15. That is, the device needs to be lowered to a deeper water layer to directly trigger water intake, thereby achieving an adaptive increase in detection depth. This makes the measurement data more representative of the characteristics of disturbed deep water masses. The detected data is transmitted through the communication equipment mounted on the buoy, and the staff monitors the seawater quality online using the transmitted data.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A seawater quality online monitoring device, comprising a detection chamber (1), characterized in that: A fixed base (2) is fixedly connected to the top of the testing chamber (1). A water quality monitor (3) is installed inside the bottom cover of the fixed base (2). A first elastic telescopic rod (4) is fixedly installed at the center of the fixed base (2). A partition (5) is fixed to the movable end of the first elastic telescopic rod (4). The partition (5) is slidably connected to the water quality monitor (3) and the bottom cover of the fixed base (2). A sliding rod (6) is slidably connected to the bottom wall of the testing chamber (1) through a bracket and a spring. A trigger assembly (7) is provided between the sliding rod (6) and the bottom wall of the testing chamber (1). A sealing plate (8) is fixed to the right end of the sliding rod (6). The bottom of the testing chamber (1) corresponds to the sealing plate (8). A water inlet (9) is provided at the location. A micro pump (17) is installed at the bottom front side of the detection chamber (1). The water inlet of the micro pump (17) is connected to the inside of the detection chamber (1). The left end of the slide rod (6) passes through the inner wall of the detection chamber (1) and is fixed with an installation plate (10). A guide rod (11) is fixed on the installation plate (10). Multiple adjustment components (12) are provided on the guide rod (11). A first magnetic block (13) is provided on each adjustment component (12). A compression cylinder (14) is fixed on the left side of the detection chamber (1) by a bracket. A plug (15) is limited and slid inside the compression cylinder (14). A second magnetic block (16) is fixed at the bottom of the plug (15).

2. The online seawater quality monitoring device according to claim 1, characterized in that: The compression cylinder (14) has an open bottom design, and the polarity of the second magnetic block (16) and the multiple first magnetic blocks (13) on opposite sides is set to be the same.

3. The online seawater quality monitoring device according to claim 1, characterized in that: Each of the adjustment components (12) includes a stop block (121) and two second elastic telescopic rods (122). The stop block (121) is slidably connected to the guide rod (11). The first magnetic block (13) is embedded and fixed in the side wall of the stop block (121). The movable ends of the two second elastic telescopic rods (122) are connected to the top of the stop block (121). The fixed ends of the two second elastic telescopic rods (122) are fixedly connected to the mounting plate (10). The front and rear ends of the stop block (121) are movably connected to float plates (123) through ball joints. The ball joints are fixed by screws.

4. The online seawater quality monitoring device according to claim 3, characterized in that: The float (123) has an airfoil-like structure, and a plurality of abutments (121) are arranged vertically along the guide rod (11), with the spacing between the plurality of abutments (121) decreasing sequentially from bottom to top.

5. The online seawater quality monitoring device according to claim 3, characterized in that: The lengths of the plurality of second elastic telescopic rods (122) decrease sequentially from bottom to top, and the stiffness coefficient of the springs built into each second elastic telescopic rod (122) increases sequentially.

6. The online seawater quality monitoring device according to claim 1, characterized in that: The triggering component (7) includes a ratchet (71) and two mounting blocks (72). The ratchet (71) is rotatably connected to the inner bottom wall of the detection chamber (1) via a rotating shaft. The two mounting blocks (72) are centrally symmetrically distributed on both sides of the ratchet (71). One of the mounting blocks (72) is fixedly connected to the inner bottom wall of the detection chamber (1), and the other mounting block (72) is fixedly connected to the slide rod (6) via a sleeve (73). Each mounting block (72) has a groove (74) on the side near the ratchet (71). Each groove (74) has a wedge block (75) slidably connected to it via a spring. Both wedge blocks (75) rotate and abut against the ratchet (71) in one direction. Each groove (74) has a pressure sensor (76) fixedly inserted inside it.

7. The online seawater quality monitoring device according to claim 6, characterized in that: The bottom end of the ratchet (71) shaft extends through to the outside of the detection chamber (1), and multiple brushes (18) are fixedly installed on the side wall of the bottom end of the ratchet (71) shaft.

8. A method for online monitoring of seawater quality, applicable to the online seawater quality monitoring device described in any one of claims 1-7, characterized in that: The method includes the following steps: S1: Suspend the detection cabin (1) on the buoy winch and lower it along the anchor rope to the sea area to be tested; S2: When lowered to the preset depth, the water pressure makes the second magnetic block (16) face the first magnetic block (13), and the magnetic repulsion makes the slide bar (6) move to the right to open the sealing plate (8) and trigger the pressure sensor (76). Seawater flows into the detection chamber (1) and is detected by the water quality monitor (3). S3: After the test is completed, the slide bar (6) moves to the left to reset, the sealing plate (8) closes the water inlet (9), and the slide bar (6) moves to the left to trigger another pressure sensor (76) on the wedge block (75) of the mounting block (72), and the micro pump (17) is started to discharge the seawater in the cabin; S4: The device continues to be lowered, and steps S2 to S4 are repeated to perform sequential depth detection. The detection data is then transmitted back through the communication equipment carried on the sea surface buoy for online monitoring. S5: When the surface ocean current velocity increases, the float (123) drives the block (121) to move upward, which raises the trigger position of the corresponding first magnetic block (13). The device needs to be lowered to a deeper water layer to trigger the water ingress detection.

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