CN109916673B - Water sample collection method and device for detecting aquaculture environment factors - Google Patents
Water sample collection method and device for detecting aquaculture environment factors Download PDFInfo
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- CN109916673B CN109916673B CN201910188837.6A CN201910188837A CN109916673B CN 109916673 B CN109916673 B CN 109916673B CN 201910188837 A CN201910188837 A CN 201910188837A CN 109916673 B CN109916673 B CN 109916673B
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Abstract
The invention discloses a water sample collection method and a water sample collection device for detecting aquaculture environmental factors, wherein a first electric push rod and a first stepping motor drive a sampler to realize horizontal and vertical movement, so that the sampler can automatically and accurately move back and forth between a fish pond and a metering module, the metering module pumps excessive water into a flow cell from the sampler, the excessive water overflows from an overflow outlet of the flow cell, the protruding part of the water in the flow cell is leveled, the flow cell is pressurized to ensure that the water in the flow cell is fully discharged, the excessive water in the flow cell is obtained by 'rough sampling' in the fish pond for the first time, and the problem of space distance is solved preliminarily; and then, accurate sampling of second metering is carried out on the result of the first sampling, so that the problem of the space distance between the sampling mechanism and the fishpond is solved, the sampling precision and the sampling reliability are guaranteed, the fishpond water sample collection and quantitative sampling are automatically completed, and the fishpond water sample sampling device can be repeatedly used among multiple fishponds.
Description
Technical Field
The invention relates to the technical field of aquaculture environment factor detection, in particular to a method and a device for automatically collecting water samples in a culture pond.
Background
The aquaculture shows the intensification, industrialization development trend, but high density artificial breeding leads to water pollution easily, finally produces the influence to aquatic products growth and development, environmental factor such as PH, temperature, ammonia nitrogen concentration, nitrite concentration all play huge effect to the growth condition of aquatic products, so detect these environmental factor in the aquaculture environment becomes the key, and the first step of realizing quality of water automated inspection is exactly the automation that will realize water sampling.
At present, two main sampling methods are adopted in the detection process of the aquaculture environmental factors: one is that the worker extracts the water in the fish pond into the sampler and then detects the environmental factors in the sampler; the other is to pump water from the fish pond by a water pump through a water pipe. Both methods have some disadvantages: first, the first method requires a worker to go to the site, reducing the automation level of the entire testing process. Secondly, when the second method is used repeatedly in a plurality of pools, it requires a plurality of repeated recoveries and releases involving the water pipe, during which sampling failures are easily caused by the wrinkles of the water pipe, so that the method is not highly reliable.
There are three factors that need to be considered in the aquaculture environment factor detection process: detection precision, detection cost and detection automation degree. In the multiple detection process, in order to improve the detection precision, the influence of the last detection on the current detection needs to be reduced, and the sampling process is realized by avoiding the residual sample sampled last time in the sampler. In addition, accurate measurement of the sampled water also has a great influence on the detection precision.
Disclosure of Invention
The invention aims to solve the problems of the existing aquaculture environment factor detection, mainly consider three elements in the detection process, improve the aquaculture environment factor detection precision and improve the detection automation degree, provides a novel high-automation water sample collection method and device for the aquaculture environment factor detection, and can be repeatedly used among a plurality of water pools.
The invention relates to a water sample collecting device for detecting aquaculture environmental factors, which adopts the technical scheme that: the automatic wire winding device comprises an MCU control system and a sampler, wherein the upper end of the sampler is wound on an output shaft of a first stepping motor through a sampler suspension wire, the first stepping motor is horizontally placed in a wire winding box, and the push rod end of a horizontal first electric push rod above the wire winding box is fixedly connected with the wire winding box through an electric push rod wire winding box connecting piece; a metering module is arranged under the first electric push rod and comprises a fixed container, a second stepping motor, a second electric push rod, a water suction pump, a circulation pool and an electromagnetic valve; the water suction pump is connected with a water inlet pipe of the water suction pump through a water inlet of the water suction pump, the water inlet pipe of the water suction pump can extend into the sampler, and a water outlet of the water suction pump is connected with a water inlet of the circulation tank; the flow cell is provided with a cylindrical flow cell upper cover plate and a flow cell water storage barrel which have the same outer diameter and the same axle center, the flow cell upper cover plate is arranged right above the flow cell water storage barrel and is separated from the flow cell water storage barrel by a certain distance, the flow cell water storage barrel is provided with an inner layer and an outer layer, the inner layer is a flow cell water storage area, and the outer layer is a flow cell overflow area; the bottom of the flow cell is respectively connected with a flow cell water outlet and a flow cell overflow outlet, and the flow cell water outlet is communicated with an electromagnetic valve; the fixed container is provided with a rotatable constant volume device rotating sleeve which is arranged right above the second electric push rod, and the upper end of the second electric push rod is fixedly connected with a rubber plug which is coaxially matched and sleeved in the fixed container rotating sleeve; the second stepping motor is horizontally arranged, an output shaft of the second stepping motor is coaxially sleeved with a helical bevel gear which is intersected and meshed with the rotating sleeve gear, and the rotating sleeve gear is coaxially and fixedly sleeved at the bottom of the rotating sleeve of the fixed container; the side wall of the upper end of the rotating sleeve of the constant volume device is connected with a flow end of the constant volume device, a water wiping end of the constant volume device and a pressurizing end of the constant volume device which extend along the radial direction, the three ends are uniformly distributed along the circumferential direction and have consistent radial dimension, and the upper and lower thickness of the radial outer end of the three ends is equal to the distance between the upper cover plate of the flow cell and the water storage barrel of the flow cell; the outer end of the flow end of the constant volume device is provided with a through hole which is communicated up and down, the side wall of the through hole is provided with a small groove, the outer end of the water applying end of the constant volume device is solid, and the outer end of the pressurizing end of the constant volume device and the inner cavity of the rotating sleeve of the constant volume device are provided with an airflow branch; the MCU control system is respectively connected with the first electric push rod, the second electric push rod, the first stepping motor, the second stepping motor, the water suction pump and the electromagnetic valve through control lines.
The technical scheme adopted by the acquisition method of the water sample acquisition device for detecting the aquaculture environmental factors comprises the following steps:
step A, in an initial state, the first electric push rod and the second electric push rod contract to the shortest length, the flow end of the constant volume device is rotated to a position between the upper cover plate of the flow cell and the water storage barrel of the flow cell, and the electromagnetic valve is in a normally closed state;
and B: the MCU control system controls the first electric push rod to be communicated in the forward direction, drives the sampler to move to the upper space of the fish pond, drives the first stepping motor to drive the sampler to move downwards to the fish pond, the sampler is completely immersed in water and filled with water, the first stepping motor rotates in the reverse direction, the first electric push rod is communicated in the reverse direction, drives the sampler to be arranged below the water inlet pipe of the water suction pump, and the water inlet pipe of the water suction pump extends into the sampler;
and step C, electrifying the water suction pump by the MCU control system, pumping the water sample in the sampler into the flow cell, controlling the second stepping motor to rotate when water in the water storage area of the flow cell overflows, driving the water wiping end of the fixed container to rotate to be nested with the flow cell, controlling the second stepping motor to continuously rotate, rotating the pressurizing end of the constant volume device to be nested with the flow cell, then controlling the electromagnetic valve to be closed, electrifying the second electric push rod at the same time, moving the rubber plug to the top end of the rotating sleeve of the constant volume device, pressurizing the flow cell, and controlling the second stepping motor to drive the circulating end of the constant volume device to rotate to be nested with the flow cell.
Compared with the prior method and technology, the invention has the following advantages:
1. the sampling method is improved and innovated on the traditional sampling idea of 'water bucket pumping', and utilizes a secondary sampling strategy, namely, excessive pond water is firstly obtained from 'rough sampling' in a fish pond for the first time, so that the problem of space distance is solved preliminarily; and then, the sampling with accurate measurement is carried out for the second time on the result of the first sampling, so that the problem of the space distance between the sampling mechanism and the fish pond is solved, and the sampling precision and the sampling reliability are guaranteed.
2. The sampler designed by the invention utilizes the pressure change of water in the sampling process, realizes automatic water feeding in the first sampling process and automatic release of redundant water in the second sampling process, greatly avoids the influence of the last sampling on the sampling result, and ensures the detection accuracy.
3. Aiming at the problem of large metering error caused by water surface swelling and residue in the device during metering, the invention adds a floating and pressurizing mechanism into the metering module, thereby greatly improving the metering precision.
4. The invention greatly reduces the detection cost under the condition of ensuring high detection precision, and ensures that the whole sampling process is highly automated.
5. The water sample collecting device provided by the invention can automatically complete the collection and quantitative sampling of the water sample in the fishpond without the field operation of workers, and can be repeatedly used among multiple fishponds.
Drawings
FIG. 1 is a schematic overall view of a water sample collection device for detecting environmental factors of aquaculture according to the present invention;
FIG. 2 is an enlarged view of the metering module of FIG. 1;
FIG. 3 is an enlarged view of the structure of the flow cell of FIG. 2;
FIG. 4 is an enlarged view of the structure of the stationary container shown in FIG. 2;
FIG. 5 is an enlarged view of the structure of the sampler of FIG. 1;
FIG. 6 is an enlarged view of the liquid level switch of FIG. 1;
FIG. 7 is a control circuit diagram of the water sample collecting device for detecting environmental factors of aquaculture according to the present invention;
FIG. 8 is a flow chart of the collecting method of the water sample collecting device for detecting the environmental factors of aquaculture in accordance with the present invention.
The serial numbers and designations of the various components in the drawings: 1. MCU control system, 2, metering module, 3, first electric push rod, 4, yellow alarm lamp, 5, red alarm lamp, 6, coiling box, 7, first stepping motor, 8, sampler hanging wire, 9, electric push rod coiling box connecting piece, 10, sampler, 11, liquid level switch, 12, waste liquid collecting box, 13, fish pond, 14, experiment box, 15, second stepping motor, 16 fixed container, 17, fixed container pressurizing end, 18, fixed container water-applying end, 19, fixed container flowing end, 20, second electric push rod, 21, bracket, 22, rubber plug, 23, helical gear, 24, rotary sleeve air cavity, 25, rotary sleeve gear, 26, water pump, 27, water pump water outlet pipe, 28, electromagnetic valve water inlet, 29, electromagnetic valve, 30, electromagnetic valve water outlet, 31, water pump water inlet pipe, 32, circulating pool water discharge pipe, 33. flow-through cell, 34, the suction pump water inlet, 35, the flow-through cell water inlet, 36, the flow-through cell delivery port, 37, the flow-through cell overflow outlet, 38, the flow-through cell fixed plate, 39, the flow-through cell overflow area, 40, the flow-through cell water storage area, 41, the flow-through cell upper cover plate, 42, the flow-through cell water storage bucket, 43, the constant volume ware pivot, 44, the constant volume ware fixed plate, 45, the rotatory sleeve of constant volume ware, 46, first spring bracket, 47, the spring, 48, the second spring bracket, 49, the sample thief string rope, 50, the sample thief water gap, 51, seal bench cover plate, 52, the filter screen mount table, 53, the filter screen, 54, the level sensor signal line, 55, first level sensor, 56, the second level sensor, 57, the level sensor connecting pipe.
Detailed Description
Referring to fig. 1, the water sample collecting device for detecting the environmental factors of aquaculture comprises an MCU control system 1, a power module, a waste liquid treatment module, a metering module 2, a sampler 10 and an experimental box 14. Wherein the MCU control system 1 and the metering module 2 are installed inside the experiment box 14, and the sampler 10 is located outside the experiment box 14. The power module consists of a first electric push rod 3, an electric push rod wire winding box connecting piece 9, a first stepping motor 7 and a wire winding box 6; the waste liquid treatment module consists of a waste liquid collecting box 12, a liquid level switch 11, a yellow working lamp 4 and a red alarm lamp 5.
The sampler 10 is used for collecting water samples in the fish pond 13, the sampler 10 is hung at the lower end of the sampler suspension wire 8, the upper end of the sampler suspension wire 8 is wound on an output shaft of the first stepping motor 7, the first stepping motor 7 is horizontally placed in the winding box 6, and the clockwise and counterclockwise rotation of the first stepping motor 7 can drive the sampler 10 to reciprocate up and down. The wire winding box 6 is fixed at the push rod end of the first electric push rod 3 through an electric push rod wire winding box connecting piece 9. The first electric push rod 3 is horizontally arranged at the top end of the experimental box 14 and is positioned above the winding box 6, and the winding box 6 and the sampler 10 can be driven to move left and right in the horizontal direction together after the first electric push rod 3 is electrified. Under the mutual cooperation of the first electric push rod 3 and the first stepping motor 7, the sampler 10 can move randomly in a two-dimensional space, so that the water in the fish pond 13 is transported to the position near the metering module 2.
The first electric push rod 3 needs to be of a type with a stroke of 100cm, so that the electric push rod is suitable for more fishpond environments. The first electric push rod 3 and the first stepping motor 7 are stroke-controllable devices, so that different stroke parameters can be set for different fishpond environments.
Directly below the flow cell drain pipe 32 of the dosing module 2 is mounted a waste collection tank 12, where waste liquid generated in the dosing module 2 can be collected. Meanwhile, the waste liquid collecting box 12 also needs to collect the water left after the sampler 10 is subjected to secondary sampling.
The top of the experimental box 14 is provided with a yellow alarm lamp 4 and a red alarm lamp 5 which are controlled by the MCU control system 1. The inside level switch 11 that is equipped with of waste liquid collecting box 12 for detect how much of waste liquid in waste liquid collecting box 12, when waste liquid collecting box 12 is full soon, 4 scintillations at MCU control system 1's control yellow alarm lamp, remind staff waste liquid collecting box to be full soon, in time clear up, when waste liquid collecting box 12 is full, MCU control system 1 control red alarm lamp 5 scintillates, in order to remind staff waste liquid collecting box 12 to be full, system's shutdown.
Referring to fig. 2, the metering module 2 mainly functions to perform "secondary sampling" on the water collected by the sampler 10, and finally output a quantitative pool of water with accurate precision. The metering module 2 comprises a bracket 21, a second stepping motor 15, a constant volume device 16 (see fig. 4 for a detailed structure), a second electric push rod 20, a water pump 26, a flow cell 33 and an electromagnetic valve 29. Decide container 16 fixed connection on support 21, perpendicular second electric putter 20 about having installed under constant volume ware 16, fixed rubber leather stopper 22 on the push rod of second electric putter 20 upper end, constant volume ware 16 has a constant volume ware rotating sleeve 45, and constant volume ware rotating sleeve 45 is directly over second electric putter 20, and is coaxial with second electric putter 20. The rotating sleeve air cavity 24 is arranged in the rotating sleeve 45 of the constant volume device, and the rubber plug 22 is coaxially sleeved in the rotating sleeve air cavity 24 and is matched with the rotating sleeve air cavity 24. The second electric push rod 20 drives the rubber plug 22 to move up and down in the rotating sleeve air cavity 24, so as to realize the purpose of pressurization.
The flow cell 33 is vertical up and down and fixed on the bracket 21, and the installation height of the flow cell 33 and the fixed container 16 is coordinated, so that the flow end 19 of the constant volume device can be just nested with the flow cell 33.
The bottom of the flow cell 33 is respectively connected with a flow cell water outlet 36 and a flow cell overflow outlet 37, the flow cell water outlet 36 is connected with an electromagnetic valve water inlet 28 through a hose, and the electromagnetic valve water inlet 28 is arranged right above the electromagnetic valve 29, so that the flow cell 33 is communicated with the electromagnetic valve 29.
The overflow port 37 of the flow cell is connected with the upper end of the drainage pipe 32 of the flow cell, the lower end of the drainage pipe 32 of the flow cell extends out of the experiment box 14, and the waste liquid collecting box 12 is arranged below the lower end of the drainage pipe 32 of the flow cell.
The water suction pump 26 is installed at the top end of the support 21, the water suction pump 26 is connected with the water suction pump inlet pipe 31 through the water suction pump inlet 34, the water suction pump inlet pipe 31 is sleeved on the water suction pump inlet 34, the water outlet 27 of the water suction pump is connected with the water inlet 35 of the circulation tank through a hose, and the water inlet 35 of the circulation tank is arranged at the top of the circulation tank 33. Thus, a complete water flow path is realized, the water in the sampler 10 enters the water pump 26 from the water inlet pipe 31 of the water pump, then enters the water inlet 35 of the flow cell from the water outlet 27 of the water pump, then a part of the water enters the electromagnetic valve 29 from the water outlet 35 of the flow cell, and finally is output for water quality detection, and the other part of the redundant water enters the waste liquid collecting tank 12 from the overflow outlet 37 of the flow cell through the water outlet pipe 32 of the flow cell.
The second stepping motor 15 is horizontally arranged, a shell of the second stepping motor is fixed on the support 21, the output shaft of the second stepping motor is coaxially sleeved with the helical bevel gear 23, the helical bevel gear 23 is meshed with the rotary sleeve gear 25 in an intersecting manner, the rotary sleeve gear 25 is coaxially sleeved at the bottom of the constant volume device rotary sleeve 45 and rotates coaxially with the constant volume device rotary sleeve 45, and the rotary sleeve gear 25 drives the constant volume device rotary sleeve 45 to rotate under the rotation of the second stepping motor 15.
Referring to fig. 3, a vertical flow cell fixing plate 38 is provided on one side of the flow cell 33, and the flow cell fixing plate 38 is fixed to the bracket 21 by four screws. The upper cover plate 41 and the water storage barrel 42 of the flow cell are fixed on the fixing plate 38 of the flow cell, both of them are cylindrical and coaxial with the same outer diameter, the outer diameter is 50mm, the upper cover plate 41 of the flow cell is right above the water storage barrel 42 of the flow cell, and the lower surface of the upper cover plate 41 of the flow cell is 5mm away from the upper surface of the water storage barrel 42 of the flow cell. The center of the flow cell upper cover plate 41 is provided with a flow cell water inlet 35 through which water passes down into the flow cell reservoir 42. The flow cell water storage barrel 42 is provided with an inner layer and an outer layer, wherein the inner layer is a flow cell water storage area 40, has an inner diameter of 30mm and is directly communicated with the flow cell water outlet 36; the outer layer is a flow cell overflow area 39, 45mm in internal diameter, which is directly connected to the flow cell overflow outlet 37. When the flow cell reservoir 40 is full, excess water will overflow into the flow cell overflow 39 and from the flow cell overflow outlet 37 into the waste collection tank 12.
Referring to fig. 4, the fixed container 16 has a fixed container fixing plate 44 and a fixed container rotating sleeve 45, the fixed container fixing plate 44 is fixed on the support 21 through screws, a cavity is formed inside the fixed container rotating sleeve 45, namely, the rotating sleeve air cavity 24, the rubber plug 22 is connected with the rotating sleeve air cavity 24 in a sealing manner, and the rubber plug 22 can move up and down. The upper end of the rotating sleeve 45 of the constant volume device is a rotating shaft 43 of the constant volume device, the upper end of the rotating shaft 43 of the constant volume device is rotatably connected with the fixed plate 44 of the constant volume device through a bearing, and therefore the rotating sleeve 45 of the constant volume device can rotate by 360 degrees. Connect constant volume ware circulation end 19, constant volume ware wiping end 18 and constant volume ware pressurization end 17 on the lateral wall of the rotatory sleeve 45 upper end of constant volume ware, the three radially extends and along the circumferencial direction equipartition, be "three leaf fan" form, the radial dimension of three is unanimous, the upper and lower thickness of their radial outer end all is 5mm, be equal to the distance that separates between circulation pond upper cover plate 41, the circulation pond water storage bucket 42 promptly, so the clearance between circulation pond upper cover plate 41 and the circulation pond water storage bucket 42 can all be just passed through to the three.
The radial outer ends of the constant volume device circulation end 19, the constant volume device water wiping end 18 and the constant volume device pressurization end 17 are all cylindrical ends, and the outer diameters of the radial outer ends are 50mm in the same plane and are the same as the outer diameters of the circulation tank upper cover plate 41 and the circulation tank water storage barrel 42. The three heads differ in structural detail because of the difference in function: the constant volume device circulation end 19 is mainly used for ensuring the up-down closing of the circulation pool 33 in the water pumping stage, so that a through hole which is communicated up and down is formed in the outer end of the constant volume device circulation end 19, the inner diameter of the through hole is 30mm and is the same as the inner diameter of the circulation pool water storage area 40 on the inner layer of the circulation pool water storage barrel 42, and a small groove with the width of 5mm is formed in the side wall of the through hole, so that redundant water in the circulation pool 33 can overflow from the small groove. The main function of the fixed container water smearing end 18 is to smear the water surface raised in the water storage area 40 of the flow-through pool after the water pumping is finished, so that the head of the outer end of the fixed container water smearing end 18 is solid. The main function of the fixed container pressurizing end 17 is to discharge the water in the flow cell 33 by utilizing the air pressure effect, so that an air flow branch with the diameter of 2mm is arranged between the head part of the outer end of the fixed container pressurizing end 17 and the inner cavity of the rotary sleeve 45 of the constant volume device, a counter bore with the depth of 4mm and the inner diameter of 30mm is arranged on the lower surface of the constant volume device pressurizing end 17, and the inner diameter of the counter bore is the same as the inner diameter of the water storage area 40 of the flow cell.
The lower end of the constant volume device rotating sleeve 45 is coaxially and fixedly sleeved with a gear-shaped rotating sleeve gear 25 which is meshed with the helical bevel gear 23, and the constant volume device rotating sleeve 45 is driven to rotate under the rotation of the second stepping motor 15, so that the container flow-through end 19, the constant volume device water wiping end 18 and the constant volume device pressurizing end 17 on the constant volume device 16 can be sequentially nested with the flow cell 33.
Referring to fig. 5, the sampler 10 mainly functions to move between the fish pond 13 and the water intake pipe 31 of the water pump under the action of the power module, so as to "roughly" sample water in the fish pond 13 into the sampler 10, and then the metering module 2 performs "secondary sampling" from the sampler 10 through the water intake pipe 31 of the water pump, so as to obtain a quantitative water sample. The sampler 10 is externally provided with a copper barrel-shaped shell, the top of the barrel-shaped shell is connected with the sampler hanging wire 8 through a sampler hanging rope 49, the bottom of the barrel-shaped shell is provided with a through hole as a sampler water port 50, and the lower surface is fixed with two spring mounting brackets: and the first spring support 46 and the second spring support 48 are used for installing and fixing the lower end of the spring 47, the upper end of the spring 47 and a rubber cover plate 51 are bonded together through hot melt glue to form a whole, and the rubber cover plate 51 is arranged inside the barrel-shaped shell. The upper part of the inner cavity of the barrel-shaped shell is provided with a set of filtering device for filtering particle impurities in the fish pond 13. The middle of the cylindrical filter device is provided with three filter screens 53 which are distributed at equal intervals. The filter base is mounted on a screen mounting table 52. When no water is in the barrel casing, the rubber cover plate 51 is supported upwards by the spring 47 and leaves the bottom end of the barrel casing, and the sampler 10 is in a normally open state, so that water can enter the barrel casing from the sampler water inlet 50. When the sampler 10 enters the fish pond 13, the sampler 10 is made of copper and can directly sink into water, when the sampler 10 sinks into water, the upper surface and the lower surface of the rubber cover plate 51 are stressed uniformly, so that the sampler 10 is still in a normally open state, when the sampler 10 leaves the fish pond 13, the rubber cover plate 51 moves downwards under the pressure of water in the barrel-shaped shell and finally reaches the bottom of the barrel-shaped shell and blocks the water through hole 50 of the sampler, and at the moment, the sampler 10 is in a normally closed state. This allows water to be smoothly fed from the fish pond 13 into the interior of the tub-like housing. When the sampler 10 moves to the position below the water inlet pipe 31 of the water pump, the MCU control system 1 controls the water pump 26 to work, so that water in the sampler 10 is pumped into the flow cell 33, and when the pumping is completed, the elasticity of the spring 47 below the upper cover plate 51 of the sealing platform is larger than the pressure of water above, so that the rubber cover plate 51 leaves the bottom of the barrel-shaped shell, and redundant water is leaked into the waste liquid collecting tank 12 from the water through hole 50 of the sampler.
Referring to fig. 6, the level switch 11 has two level sensors: a first level sensor 55 and a second level sensor 56. The first level sensor 55 and the second level sensor 56 are disposed in the vertical level sensor connection pipe 57 from top to bottom at a certain interval. The liquid level sensor connecting pipe 57 is a hollow pipe, and the liquid level sensor signal wire 54 is led out from the upper end of the liquid level sensor connecting pipe 57 to be connected with the MCU control system 1 inside the liquid level sensor connecting pipe 57.
Referring to fig. 7, the MCU control system 1 is connected to the first electric push rod 3 and the second electric push rod 20, the first stepping motor 7 and the second stepping motor 15, the water pump 26, the solenoid valve 29, the yellow warning lamp 4, and the red warning lamp 5 through control lines; the MCU control system 1 is respectively connected with a first liquid level sensor 55 and a second liquid level sensor 56 in the liquid level switch 11 through signal lines. The power supply module provides energy for the whole system.
The MCU control system 1 controls the extension or contraction of the first electric push rod 3 by controlling the forward electrification or the reverse electrification of the first electric push rod 3 to drive the winding box 6 to move horizontally; the MCU control system 1 controls the second electric push rod 20 to extend or contract by controlling the second electric push rod 20 to be electrified in the forward direction or the reverse direction, and further drives the rubber plug 22 to move up and down to achieve the purpose of pressurization. PWM waves with corresponding length duty ratios are sent to driving chips of the first stepping motor 7 and the second stepping motor 15 through the MCU control system 1 to control the rotation angles of the first stepping motor 7 and the second stepping motor 15, so that the first stepping motor 7 drives the sampler 10 to ascend and descend, and the second stepping motor 15 drives the fixed container 16 to rotate. The water in the sampler 10 is pumped for secondary sampling by controlling the electrifying time of the water pump 26 and the electromagnetic valve 29; whether the waste liquid in the waste liquid collecting tank 15 is full or not is judged by detecting the input of the first liquid level sensor 55 and the second liquid level sensor 56, and then the yellow alarm lamp 4 or the red alarm lamp 5 is controlled to give a prompt.
Referring to fig. 8 and fig. 1 to 7, when the water sample collection device for detecting the environmental factors of aquaculture provided by the invention works, the sampler 10 utilizes the pressure change of water in the sampling process to realize automatic water feeding in the first sampling process and automatic release of redundant water after the second sampling, thereby solving the problem that the sampling result is influenced by the last sampling sample. The first electric push rod 3 and the first stepping motor 7 in the power module drive the sampler 10 to move horizontally and vertically, so that the sampler 10 can automatically and accurately move back and forth between the fish pond 13 and the metering module 2. The metering module 2 pumps excessive water into the flow cell 33 from the sampler 10, the excessive water overflows from the overflow port of the flow cell 33, but the surface of the water in the flow cell 33 is raised, and the raised part brings metering errors, so that the raised part of the water in the flow cell 33 needs to be smoothed, and meanwhile, in order to make the residual liquid in the device as little as possible, the flow cell 33 needs to be pressurized to ensure that the water in the flow cell 33 is sufficiently discharged, and finally, the purpose of quantitative sampling is achieved. The waste liquid treatment module is used for collecting waste liquid generated in the sampler 10, the metering module 2 and the detection process, and has a water full alarm function. The specific working steps are as follows:
step 1: a water sample collecting device for detecting the aquaculture environmental factors is placed on the side of the fishpond 13, and the liquid in the waste liquid collecting box 12 is poured out. In the initial state: the first electric push rod 3 and the second electric push rod 20 are contracted to the shortest length, the constant volume device circulation end 19 is rotated to a position between the circulation pool upper cover plate 41 and the circulation pool water storage barrel 42, the yellow alarm lamp 4 and the red alarm lamp 5 are turned off, and the electromagnetic valve 29 in the metering module 2 is in a normally closed state.
Step 2: the first "coarse" sample. The MCU control system 1 controls the first electric push rod 3 to be powered on in the forward direction and times for 15s through a timer. When the timer of the MCU control system 1 is timed, the first electric push rod 3 drives the sampler 10 to move to the upper part of the fish pond 13, and then the MCU control system 1 sends a PWM wave with a certain duty ratio to the driving chip of the first stepping motor 7 to drive the first stepping motor 7 to rotate in the forward direction, so as to drive the sampler 10 to move downward to the fish pond 13, thereby ensuring that the sampler 10 is completely submerged in water. The MCU control system 1 then waits for the sampler 10 to fill with water by timing with a timer for 30 s. Then the MCU control system 1 controls the first stepping motor 7 to rotate reversely, so that the sampler 10 moves to the height of the pipe orifice of the water inlet pipe 31 of the water suction pump, then the MCU control system 1 controls the first electric push rod 3 to be powered on reversely, so that the first electric push rod 3 drives the sampler 10 to be arranged below the water inlet pipe 31 of the water suction pump, and the MCU control system 1 controls the first stepping motor 7 to work again, so that the water inlet pipe 31 of the water suction pump extends into the sampler 10.
And 3, performing secondary sampling. The MCU control system 1 first energizes the water pump 26, and the water pump 26 pumps the sampled water in the sampler 10 into the flow cell 33 through the water pump inlet pipe 31. After the pump 26 continues to pump water for 5 seconds, the flow cell reservoir 40 is filled and partially overflows into the flow cell overflow area 39 and then flows through the flow cell overflow line 32 to the waste collection tank 12. After the water pump 26 stops working for 5s, the water at the overflow outlet 37 of the flow cell does not overflow any more, and air enters from the water inlet pipe 31 of the water pump, so that the water in the water inlet pipe 31 of the water pump flows back into the sampler 10. When the flow cell impoundment area 40 has been emptied of water, a volume of about 10mL is maintained, but the level in the flow cell impoundment area 40 rises, and this rising volume causes a large error and therefore needs to be "screeded". The MCU control system 1 controls the second stepping motor 15 to rotate, drives the fixed container water wiping end 18 to rotate to be nested with the flow cell 33, and the MCU control system 1 waits for 5s at regular time. Then the MCU control system 1 controls the second stepping motor 15 to continue rotating, the rotating sleeve air cavity is driven to rotate, the pressurizing end 17 of the constant volume device is enabled to rotate to be nested with the flow cell 33, then the MCU control system 1 controls the electromagnetic valve 29 to be closed for 6s, meanwhile, the second electric push rod 20 is electrified for 6s, the rubber plug 22 is enabled to move to the top end of the rotating sleeve 45 of the constant volume device, air pressure is added to the flow cell 33, water in the flow cell 33 flows out from the electromagnetic valve water outlet 30 more fully, and errors caused by residual water in the device are reduced. And finally, the MCU control system 1 controls the second stepping motor 15 to drive the flow end 19 of the constant volume device to be nested with the flow cell 33. The electromagnetic valve 29 is opened to ensure that the water in the flow cell 33 is fully discharged, and quantitative sampling is carried out.
And 4, detecting the liquid level height in the waste liquid collecting box 12. If the MCU control system 1 detects that the first liquid level sensor 55 and the second liquid level sensor 56 both output high levels by controlling the liquid level switch 11, that is, the liquid level of the waste liquid in the waste liquid collector 12 is lower than that of the second liquid level sensor 56, it means that the waste liquid in the waste liquid collector 12 is not much, the MCU control system 1 does not process the waste liquid, the whole system works normally, and the process returns to step 2. If MCU control system 1 detects first level sensor 55 through control level switch 11 and outputs high level, and second level sensor 56 outputs low level, and the waste liquid level of waste liquid collector 12 is less than second level sensor 56 promptly, then 4 scintillations of yellow alarm lamp of MCU control system 1 control, it is more to indicate the waste liquid in waste liquid collector 12, and the suggestion staff should in time clear up, but the system still normally works, gets back to step 2. If MCU control system 1 detects first level sensor 55, second level sensor 56 through control level switch 11 and all outputs the low level, and the waste liquid level in waste liquid collector 12 is higher than first level sensor 55 promptly, then MCU control system 1 control red alarm lamp 5 scintillation indicates that the waste liquid in waste liquid collector 12 is too much, and the suggestion staff clears up immediately, MCU control system 1 control system stop work.
Claims (7)
1. The utility model provides a water sample collection system for aquaculture environmental factor detects, includes MCU control system (1) and sample thief (10), characterized by: the upper end of the sampler (10) is wound on an output shaft of a first stepping motor (7) through a sampler suspension wire (8), the first stepping motor (7) is horizontally placed in a winding box (6), and the push rod end of a horizontal first electric push rod (3) above the winding box (6) is fixedly connected with the winding box (6) through an electric push rod winding box connecting piece (9); a metering module (2) is arranged under the first electric push rod (3), and the metering module (2) comprises a fixed container (16), a second stepping motor (15), a second electric push rod (20), a water suction pump (26), a circulation pool (33) and an electromagnetic valve (29); the water suction pump (26) is connected with a water inlet pipe (31) of the water suction pump through a water inlet (34) of the water suction pump, the water inlet pipe (31) of the water suction pump can extend into the sampler (10), and a water outlet (27) of the water suction pump is connected with a water inlet (35) of the circulation tank; the flow cell (33) is provided with a cylindrical flow cell upper cover plate (41) and a flow cell water storage barrel (42) which have the same outer diameter and the same axle center, the flow cell upper cover plate (41) is arranged right above the flow cell water storage barrel (42) and is separated from the flow cell water storage barrel by a certain distance, the flow cell water storage barrel (42) is provided with an inner layer and an outer layer, the inner layer is a flow cell water storage area (40), and the outer layer is a flow cell overflow area (39); the bottom of the flow cell (33) is respectively connected with a flow cell water outlet (36) and a flow cell overflow outlet (37), and the flow cell water outlet (36) is communicated with an electromagnetic valve (29); the fixed container (16) is provided with a rotatable fixed container rotating sleeve (45), the fixed container rotating sleeve (45) is arranged right above the second electric push rod (20), and the upper end of the second electric push rod (20) is fixedly connected with a rubber plug (22) which is coaxially matched and sleeved in the fixed container rotating sleeve (45); the second stepping motor (15) is horizontally arranged, an output shaft of the second stepping motor is coaxially sleeved with a helical bevel gear (23) which is intersected and meshed with the rotating sleeve gear (25), and the rotating sleeve gear (25) is coaxially and fixedly sleeved at the bottom of the rotating sleeve (45) of the fixed container; the side wall of the upper end of the rotating sleeve (45) of the constant volume device is connected with a flow end (19) of the constant volume device, a water wiping end (18) of the constant volume device and a pressurizing end (17) of the constant volume device, which extend along the radial direction, the three ends are uniformly distributed along the circumferential direction and have the same radial size, and the upper and lower thicknesses of the radial outer end heads of the three ends are equal to the distance between the upper cover plate (41) of the flow cell and the water storage barrel (42) of the flow cell; the outer end of the flow end (19) of the constant volume device is provided with a through hole which is through up and down, the side wall of the through hole is provided with a small groove, the outer end of the water applying end (18) of the constant volume device is solid, and the outer end of the pressurizing end (17) of the constant volume device and the inner cavity of the rotating sleeve (45) of the constant volume device are provided with an airflow branch; the MCU control system (1) is respectively connected with the first electric push rod (3), the second electric push rod (20), the first stepping motor (7), the second stepping motor (15), the water suction pump (26) and the electromagnetic valve (29) through control lines.
2. The water sample collecting device for detecting the environmental factors of the aquaculture according to claim 1, which is characterized in that: the sampler (10) is externally provided with a barrel-shaped shell, the bottom of the barrel-shaped shell is provided with a sampler water opening (50), the lower surface of the barrel-shaped shell is fixed with a spring support which is fixedly connected with the lower end of a spring (47), the upper end of the spring (47) is connected with a rubber cover plate (51), and the upper part of the inner cavity of the barrel-shaped shell is provided with a set of filtering device.
3. The water sample collecting device for detecting the environmental factors of the aquaculture according to claim 1, which is characterized in that: constant volume ware circulation end (19), the radial outer end of constant volume ware wiping end (18) and constant volume ware pressurization end (17) all is cylindric end, and the external diameter the same with circulation pond upper cover plate (41) and circulation pond water storage bucket (42), the internal diameter of the through-hole of the outer end department of constant volume ware circulation end (19) is the same with the internal diameter of circulation pond impoundment district (40), the lower surface of constant volume ware pressurization end (17) is opened there is the counter bore, the counter bore internal diameter is the same with the internal diameter of circulation pond impoundment district (40).
4. The water sample collecting device for detecting the environmental factors of the aquaculture according to claim 1, which is characterized in that: the circulating pool water storage area (40) is communicated with a circulating pool water outlet (36), the circulating pool overflow area (39) is communicated with a circulating pool overflow outlet (37), the circulating pool overflow outlet (37) is connected with the upper end of a circulating pool drainage water pipe (32), a waste liquid collecting box (12) is arranged below the lower end of the circulating pool drainage water pipe (32), a liquid level switch (11) is arranged inside the waste liquid collecting box (12), and the liquid level switch (11) is connected with the MCU control system (1).
5. The water sample collecting device for detecting the environmental factors of the aquaculture according to claim 4, which is characterized in that: the liquid level switch (11) is composed of two liquid level sensors, the two liquid level sensors are distributed in the vertical liquid level sensor connecting pipe (57) from top to bottom, and are connected with the MCU control system (1) through a liquid level sensor signal wire.
6. The water sample collecting device for detecting the environmental factors of the aquaculture according to claim 1, which is characterized in that: the MCU control system (1) is respectively connected with a yellow alarm lamp (4) and a red alarm lamp (5) through control lines.
7. A method for collecting a water sample collection device for detecting the environmental factors of aquaculture according to claim 1, which comprises the following steps:
step A, in an initial state, the first electric push rod (3) and the second electric push rod (20) are contracted to the shortest length, the flow end (19) of the constant volume device is rotated to a position between the upper cover plate (41) of the flow cell and the water storage barrel (42) of the flow cell, and the electromagnetic valve (29) is in a normally closed state;
and B: the MCU control system (1) controls the first electric push rod (3) to be communicated in the forward direction, drives the sampler (10) to move to the upper space of the fish pond (13), drives the first stepping motor (7) to drive the sampler (10) to move downwards to the fish pond (13), the sampler (10) is completely immersed in water and filled with water, the first stepping motor (7) rotates in the reverse direction, the first electric push rod (3) is communicated in the reverse direction, drives the sampler (10) to be arranged below the water inlet pipe (31) of the water suction pump, and the water inlet pipe (31) of the water suction pump extends into the sampler (10);
and step C, electrifying the water suction pump (26) by the MCU control system (1), pumping the water sample in the sampler (10) into the flow cell (33), controlling the second stepping motor (15) to rotate when the water in the water storage area (40) of the flow cell overflows, driving the fixed container water wiping end (18) to rotate to be nested with the flow cell (33), controlling the second stepping motor (15) to continue rotating, enabling the fixed container pressurizing end (17) to rotate to be nested with the flow cell (33), then controlling the electromagnetic valve (29) to be closed, electrifying the second electric push rod (20), moving the rubber plug (22) to the top end of the fixed container rotating sleeve (45), pressurizing the flow cell (33), and controlling the second stepping motor (15) to drive the fixed container flow end (19) to be nested with the flow cell (33).
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