CN114563543A - Intelligent dissolved oxygen experimental apparatus - Google Patents
Intelligent dissolved oxygen experimental apparatus Download PDFInfo
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- CN114563543A CN114563543A CN202210189043.3A CN202210189043A CN114563543A CN 114563543 A CN114563543 A CN 114563543A CN 202210189043 A CN202210189043 A CN 202210189043A CN 114563543 A CN114563543 A CN 114563543A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1886—Water using probes, e.g. submersible probes, buoys
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/16—Controlling mixing ratio of fluids having different temperatures, e.g. by sensing the temperature of a mixture of fluids having different viscosities
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses an intelligent dissolved oxygen experimental device, which adopts the technical scheme that the intelligent dissolved oxygen experimental device comprises an experimental water pool and a plurality of experimental boxes, wherein the experimental water pool is in a circular truncated cone structure; a plurality of experiment boxes are arranged around the edge of the upper top surface of the experiment pool, and communication holes are arranged at the bottom of the experiment boxes and communicated with the experiment pool; the lower bottom surface of the experimental water pool is also provided with an aeration device, the middle part of the experimental water pool is provided with a partition plate, the center of the partition plate is provided with a large through hole, the edge of the partition plate is provided with a plurality of small through holes, the partition plate is also provided with a guide cylinder communicated with the large through hole, the guide cylinder is of a conical structure, and the guide cylinder is provided with a liquid outlet channel which inclines downwards; the experiment water pool is divided into a lower mixing area, an upper flow guide area and an annular flow area, and a blocking structure is further arranged in the lower mixing area.
Description
Technical Field
The invention relates to the technical field of experimental devices, in particular to an intelligent dissolved oxygen experimental device.
Background
Dissolved Oxygen (Dissolved Oxygen) refers to Oxygen Dissolved in the water in molecular form, i.e., O2 in water, represented by DO. Dissolved oxygen is an indispensable condition for the survival of aquatic organisms. One source of dissolved oxygen is when the dissolved oxygen in water is not saturated, oxygen in the atmosphere permeates into the water body; another source is the oxygen released by aquatic plants through photosynthesis. The dissolved oxygen varies with temperature, pressure, and salinity, generally speaking, the higher the temperature, the larger the dissolved salt, the lower the dissolved oxygen in the water; the higher the gas pressure, the higher the dissolved oxygen in the water.
The dissolved oxygen in natural water is close to the saturation value (9ppm), and the content of the dissolved oxygen is reduced when the algae are vigorously bred. The dissolved oxygen in the water body can be reduced by the pollution of organic matters and reducing substances, for aquaculture industry, the dissolved oxygen in the water body has a vital influence on the survival of aquatic organisms such as fishes, when the dissolved oxygen is lower than 4mg/L, the fishes can be suffocated to die, and for human beings, the content of the dissolved oxygen in healthy drinking water is not less than 6 mg/L. When the consumption rate of the Dissolved Oxygen (DO) is greater than the rate of dissolving oxygen into the water body, the content of the dissolved oxygen can approach 0, at the moment, anaerobic bacteria can be propagated to deteriorate the water body, so the dissolved oxygen can reflect the pollution of the water body, particularly the degree of organic matter pollution, which is an important index of the water body pollution degree and also a comprehensive index for measuring the water quality. Therefore, the measurement of the dissolved oxygen content in the water body has important significance for environmental monitoring and the development of the aquaculture industry.
In the prior art, the dissolved oxygen experimental device has the problems of unstable and uneven dissolved oxygen concentration.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the intelligent dissolved oxygen experimental device which has the advantage of stable and uniform dissolved oxygen concentration, and the dissolved oxygen concentration is automatically adjusted through the PLC, so that the operation of experimenters is simpler.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an intelligent experimental apparatus of dissolved oxygen, includes experiment pond and a plurality of experimental box, its characterized in that: the experimental water tank is of a circular truncated cone structure with a small lower bottom surface and a large upper top surface; the plurality of experiment boxes are fixedly arranged around the edge of the upper top surface of the experiment pool, and communication holes are formed in the bottom of the experiment boxes and communicated with the experiment pool; the center of the lower bottom surface of the experimental water tank is also provided with an aeration device, the aeration device comprises a first annular aeration pipe and a second annular aeration pipe which are concentrically arranged, the middle part of the experimental water tank is provided with a partition plate, the center of the partition plate is provided with a large through hole, the edge of the partition plate is provided with a plurality of small through holes, the partition plate is also provided with a guide cylinder communicated with the large through hole, the guide cylinder is of a conical structure with a small upper part and a large lower part, and the side wall of the top of the guide cylinder is provided with a liquid outlet channel inclining downwards; the experimental water pool is divided into a lower mixing area and an upper flow guide area by the partition plate, the side wall of the flow guide cylinder, the inner wall of the experimental water pool and the partition plate form an annular flow area, and a blocking structure is further arranged in the lower mixing area.
By adopting the technical scheme, the gas and the water can be fully mixed, the gas entering the experimental water tank through the aeration device is fully dissolved in the lower mixing zone through the lower mixing zone, the upper flow guide zone and the annular flow zone, the liquid is guided in the upper flow guide zone in a concentrated manner and is diffused from the middle to the two sides in a directional manner, and the liquid with the target concentration flows in a circulating manner through the annular flow zone, so that the dissolved oxygen concentration in each experimental box is kept uniform and stable.
The invention is further configured to: the aeration device is respectively connected with an oxygen air pump and a nitrogen air pump through pipelines, and the air outlets of the oxygen air pump and the nitrogen air pump are respectively provided with an oxygen flow control valve and a nitrogen flow control valve.
The invention is further configured to: a plurality of evenly distributed's nanometer aeration heads all are provided with on annular aeration pipe and No. two annular aeration pipes, annular aeration pipe sets up the inboard at No. two annular aeration pipes, it blocks the piece including middle part and side and blocks the piece to block the structure, the middle part blocks the piece and sets up for the umbrella-type, the side blocks the piece and sets up for the annular, the diameter that the middle part blockked the piece is greater than the diameter of No. two annular aeration pipes.
Through adopting above-mentioned technical scheme, prolong the contact time of gas and liquid with blocking the piece for gas fully dissolves into water.
The invention is further configured to: the middle blocking piece is provided with two pieces which are arranged between the large through hole and the aeration device, the side blocking pieces are annularly arranged on the side wall of the experimental water pool, and the middle blocking piece and the side blocking pieces are inclined downwards.
Through adopting above-mentioned technical scheme, block the bubble that aeration equipment sent with blocking structure for the bubble can directly upwards escape, can remain longer time in aqueous, increases the degree of gas-liquid mixture.
The invention is further configured to: the test box is internally provided with a dissolved oxygen monitoring probe which is electrically connected with an external control console and used for monitoring the concentration of dissolved oxygen in the test box in real time and sending the concentration data to the control console, and the control console comprises a start button, a stop button, an internal PLC and a touch screen.
By adopting the technical scheme, the concentration of the dissolved oxygen in the water tank is monitored in real time, and is fed back to the PLC, and the dissolved oxygen is regulated and controlled in real time through the PLC.
The invention is further configured to: the oxygen flow control valve and the nitrogen flow control valve are electrically connected with the control console and are used for monitoring the flow of the gas entering the experimental water pool, sending flow data to a PLC in the control console and controlling the flow data by the PLC.
Through adopting above-mentioned technical scheme, cooperation aeration equipment adjusts the gas that gets into in the aeration equipment to satisfy the control to dissolved oxygen concentration.
The invention is further configured to: the touch-sensitive screen is connected with the PLC electricity, be provided with real-time concentration display area, target concentration display area, air flow display area and error zone on the touch-sensitive screen, real-time concentration display area is used for showing current dissolved oxygen concentration in the experimental box, target concentration display area is used for showing and inputs artifical appointed target concentration, air flow display area is used for showing the gas flow that nitrogen gas and oxygen get into the experiment pond, the error zone is used for the error percentage that real-time concentration of manual input and target concentration can allow the existence.
By adopting the technical scheme, the experimenter can observe and control the concentration of the dissolved oxygen in the experimental water pool from the information on the touch screen.
The invention is further configured to: and the PLC reads the numerical value of a target concentration display area on the touch screen, compares and calculates the target concentration and the real-time concentration returned by the dissolved oxygen monitoring probe through a numerical value comparison unit, and controls the oxygen flow control valve and the nitrogen flow control valve to regulate the gas flow by the PLC.
By adopting the technical scheme, the PLC reads the data on the touch screen and compares the data with the return value of the dissolved oxygen monitoring probe to calculate, thereby controlling the flow of the valve and achieving the effect of automatically controlling the concentration of the dissolved oxygen in the experimental water tank.
In conclusion, the invention has the following beneficial effects:
compared with the prior art, the invention is provided with a blocking structure, a guide cylinder, a partition plate, an aeration device and a control console, wherein the aeration device is provided with a first annular aeration pipe and a second annular aeration pipe, and is provided with a plurality of nano aeration heads, gas is released through the nano aeration heads to generate fine bubbles, the contact area of the gas and water is increased, the upward floating route of the gas is limited through the partition plate and the blocking structure, so that the gas stays for a longer time in a lower mixing zone, the gas is fully dissolved in the water, the dissolved oxygen concentration in the water body is ensured to be basically consistent with a set target value, a gas-liquid mixture enters an upper guide zone through large through holes on the partition plate, the guide cylinder which is tapered in the shape of small top and big bottom guides the water, and the air flow pushes the water body to flow to the top of the guide cylinder to achieve the effect of gathering to the top, the liquid flows out of the liquid outlet channel to the inner wall of the experimental water pool, moves downwards along the surface of the inner wall after contacting the inclined inner wall, meets the partition plate, a small part of the liquid flows back from the small through hole to the lower mixing area, and the majority of the liquid continuously moves inwards along the surface of the partition plate and then meets the inclined side wall of the guide cylinder to move upwards along the side wall, so that the water body circularly flows in the vertical direction of the circular flow area with the cross section formed by the side wall of the guide cylinder, the inner wall of the experimental water pool and the partition plate in a trapezoidal structure with a large upper part and a small lower part, all the water body in the circular flow area is driven to circularly flow by the circular flow, the liquid meeting the concentration requirement is not gathered at the liquid outlet, and the problem of insufficient concentration at other places is solved, therefore, the dissolved oxygen concentration in each experimental box is uniform and meets the target concentration, and the problems of unstable and non-uniform dissolved oxygen concentration of the dissolved oxygen experimental device in the prior art are solved; the PLC and the touch screen arranged on the console perform feedback adjustment on the concentration of the dissolved oxygen, automatically maintain the balance of the concentration of the dissolved oxygen and have a man-machine interaction function.
Drawings
FIG. 1 is a schematic view of the experimental pond of this embodiment;
FIG. 2 is a schematic block diagram of the connection relationship of modules in the present embodiment;
fig. 3 is a functional flow schematic block diagram of the present embodiment.
Reference numerals: 1. an experimental water pool; 101. a lower mixing zone; 102. an upper flow guide zone; 103. an annular flow region; 2. an experimental box; 201. a communication hole 3 and a control console; 301. a touch screen; 302. a stop button; 303. a start button; 4. an aeration device; 401. a first annular aeration pipe; 402. a second annular aeration pipe; 403. an oxygen pump; 404. a nitrogen gas pump; 4031. an oxygen flow control valve; 4041. a nitrogen flow control valve; 5. a partition plate; 6. a large through hole; 7. a small through hole; 8. a draft tube; 9. a blocking sheet; 901. a middle barrier sheet; 902. a side blocking sheet; 10. dissolved oxygen monitoring probe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The embodiment discloses an intelligent dissolved oxygen experimental apparatus, as shown in fig. 1-3, including experimental pond 1 and a plurality of experimental box 2, its characterized in that: the experimental water pool 1 is of a circular truncated cone structure with a small lower bottom surface and a large upper top surface; a plurality of experiment boxes 2 are fixedly arranged around the edge of the upper top surface of the experiment pool 1, and the bottom of each experiment box 2 is provided with a communication hole 201 communicated with the experiment pool 1; the central position of the lower bottom surface of the experimental water tank 1 is also provided with an aeration device 4, the aeration device 4 comprises a first annular aeration pipe 401 and a second annular aeration pipe 402 which are concentrically arranged, the distances of a plurality of experimental boxes 2 relative to the aeration devices at the central position of the experimental water tank 1 are equal by arranging the aeration devices around the experimental water tank 1, the influence of concentration errors caused by the distances is reduced, the aeration pipes arranged annularly are more concentrated than the air outlet areas of the aeration pipes arranged linearly, and larger fluctuation of local water areas can be generated, so that the control of the liquid flow direction is facilitated; the middle part of the experimental water pool 1 is provided with a partition plate 5, the center of the partition plate 5 is provided with a large through hole 6, the edge of the partition plate 5 is provided with a plurality of small through holes 7, the partition plate 5 is also provided with a guide cylinder 8 communicated with the large through hole 6, the guide cylinder 8 is of a conical structure with a small top and a large bottom, the side wall of the top of the guide cylinder 8 is provided with a liquid outlet channel 801 which inclines downwards, and the inclined arrangement of the liquid outlet channel 801 ensures that liquid can obtain an initial speed which inclines downwards when flowing out; the experimental water pool 1 is divided into a lower mixing area 101 and an upper flow guide area 102 by the partition plate 5 and the guide cylinder 8 on the partition plate, the side wall of the guide cylinder 8, the inner wall of the experimental water pool 1 and the partition plate 5 form an annular flow area 103, the section of the annular flow area 103 is of a trapezoidal structure with a large upper part and a small lower part, and liquid can circularly flow in the annular flow area; and a blocking structure 9 is also arranged in the lower mixing area, and the blocking structure 9 can ensure that gas cannot directly float upwards to escape, but is fully mixed with water in the lower mixing area 101, so that the concentration of dissolved oxygen conforms to a target set value.
Further, the aeration apparatus 4 is respectively connected to an oxygen gas pump 403 and a nitrogen gas pump 404 through pipelines, and the oxygen gas pump 403 and the nitrogen gas pump 404 are further respectively provided with an oxygen flow control valve 4031 and a nitrogen flow control valve 4041 at their air outlets.
Further, a plurality of nano aeration heads which are uniformly distributed are arranged on the first annular aeration pipe 401 and the second annular aeration pipe 402, the first annular aeration pipe 401 is arranged on the inner side of the second annular aeration pipe 402, the blocking sheet 9 comprises a middle blocking sheet 901 and a side blocking sheet 902, the middle blocking sheet 901 is arranged in an umbrella shape, the side blocking sheet 902 is arranged in an annular shape, the diameter of the middle blocking sheet 901 is larger than that of the second annular aeration pipe 402, and the diameter of the middle blocking sheet 901 is larger than that of the second annular aeration pipe 402, so that updraft generated by the aeration pipes can be completely blocked, and the function of changing the flow direction of a gas-liquid mixture is realized.
Further, the middle blocking piece 901 is provided with two pieces which are arranged between the large through hole 6 and the aeration device 4, the side blocking piece 902 is annularly arranged on the side wall of the experimental water tank 1, and both the middle blocking piece 901 and the side blocking piece 902 are inclined downwards.
Furthermore, a dissolved oxygen monitoring probe 10 is arranged in the experiment box 2, and the dissolved oxygen monitoring probe 10 is electrically connected with the PLC and used for monitoring the concentration of dissolved oxygen in the experiment box in real time and sending the concentration data to the PLC.
Further, the oxygen flow control valve 4031 and the nitrogen flow control valve 4041 are electrically connected to the PLC, and are configured to monitor the flow of the gas entering the experimental water pool 1, send flow data to the PLC, and be controlled by the PLC.
Further, the touch screen 301 is electrically connected with the PLC, a real-time concentration display area, a target concentration display area, a gas flow display area and an error area are arranged on the touch screen 301, the real-time concentration display area is used for displaying the current dissolved oxygen concentration in the experiment box, the target concentration display area is used for displaying and inputting the manually-specified target concentration, the gas flow display area is used for displaying the gas flow of nitrogen and oxygen entering the experiment pool, and the error area is used for manually inputting the error percentage that the real-time concentration and the target concentration can be allowed to exist.
Further, the PLC reads the value of the target concentration display area on the touch screen 301, and compares and calculates the target concentration and the real-time concentration returned by the dissolved oxygen monitoring probe through the value comparison unit, and when the error percentage between the real-time concentration and the target concentration is greater than or less than the value set in the error area, the PLC controls the oxygen flow control valve 4031 and the nitrogen flow control valve 4041 to adjust the gas flow.
The working principle is as follows: before an experiment is prepared, firstly inputting a required dissolved oxygen concentration in a target concentration area on a touch screen 301, then pressing a start button 303, as shown in a flow shown in fig. 3, after reading data on the touch screen 301, the PLC then returns a real-time concentration through a dissolved oxygen monitoring probe 10, calculates an error between the current real-time concentration and the target concentration, compares the error with a value set in the error area of the touch screen 301, and automatically adjusts the proportion of oxygen and nitrogen, and when the real-time concentration exceeds the calculated value of the target concentration and the error, it indicates that the dissolved oxygen in the current experiment pool is too high, the PLC controls an oxygen flow control valve 4031 and a nitrogen flow control valve 4041, reduces the input of oxygen, and increases the input of nitrogen, so that the real-time concentration of dissolved oxygen in the experiment pool 1 is reduced to reach the target concentration; and when the real-time concentration is lower than the calculated values of the target concentration and the error, the result shows that the dissolved oxygen in the experimental water pool 1 is too low at present, the input of oxygen is increased, and the input of nitrogen is reduced, so that the target concentration is achieved.
After the gas flows through the flow valve to control the gas flow, the gas enters the experimental water pool 1 through the aeration device 4, fine gas molecules are generated through the nano aeration head, so that bubbles are fully contacted with water, as shown in the flow direction of an arrow in figure 1, the gas is blocked by the middle barrier sheet 901 in the floating process, moves to both sides along the surface of the middle barrier sheet 901, continues to float after moving to the side edge, and then stops again when encountering the side barrier sheet 902, then moves along the surface of the side barrier sheet 902, and then is stopped by the barrier sheet 9 for multiple times, the contact time of the gas in the water is longer, the gas is fully dissolved, after the gas and the liquid are fully dissolved in the lower mixing zone 101, the gas-liquid mixture continues to move upwards, enters the guide cylinder 8 through the large through hole 6, and then flows out from the liquid outlet channel 801 at the top of the guide cylinder 8, wherein the liquid outlet channel 801 inclines downwards, the initial velocity of the gas-liquid mixture is inclined downwards, undissolved gas escapes from the upper part, the residual liquid with the target concentration flows obliquely downwards, annular flow in the vertical direction is formed in the annular flow area 103 under the influence of the experimental water pool 1, the side wall of the guide cylinder 8 and the partition plate 5, part of the liquid returns to a water area below the partition plate 5 through the small through hole 7 to be mixed with gas and liquid again, and the concentration of dissolved oxygen in each experimental box 2 is uniform due to the annular flow; the stop experiment is stopped by simply pressing the stop button 302 and the console 3 stops the operation of the air pump so that the device no longer admits air.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the design concept of the present invention should be included in the scope of the present invention.
Claims (8)
1. The utility model provides an intelligent experimental apparatus of dissolved oxygen, includes experimental water pond (1) and a plurality of experimental box (2), its characterized in that: the experimental water tank (1) is of a circular truncated cone structure with a small lower bottom surface and a large upper top surface; the plurality of experiment boxes (2) are fixedly arranged around the edge of the upper top surface of the experiment pool (1), and the bottom of each experiment box (2) is provided with a communicating hole (201) communicated with the experiment pool (1); an aeration device (4) is further arranged at the center of the lower bottom surface of the experimental water tank (1), the aeration device (4) comprises a first annular aeration pipe (401) and a second annular aeration pipe (402) which are concentrically arranged, a partition plate (5) is arranged in the middle of the experimental water tank (1), a large through hole (6) is formed in the center of the partition plate (5), a plurality of small through holes (7) are formed in the edge of the partition plate (5), a guide cylinder (8) communicated with the large through hole (6) is further arranged on the partition plate (5), the guide cylinder (8) is of a conical structure with a small upper part and a large lower part, and a liquid outlet channel (801) inclining downwards is formed in the side wall of the top of the guide cylinder (8); the experimental water pool (1) is divided into a lower mixing area (101) and an upper flow guide area (102) by the partition plate (5) and the guide cylinder (8) on the partition plate, the side wall of the guide cylinder (8), the inner wall of the experimental water pool (1) and the partition plate (5) form an annular flow area (103), and a blocking structure (9) is arranged in the lower mixing area.
2. The intelligent dissolved oxygen experimental facility as claimed in claim 1, wherein: the aeration device (4) is respectively connected with an oxygen air pump (403) and a nitrogen air pump (404) through pipelines, and the air outlets of the oxygen air pump (403) and the nitrogen air pump (404) are respectively provided with an oxygen flow control valve (4031) and a nitrogen flow control valve (4041).
3. The intelligent dissolved oxygen experimental facility as claimed in claim 1, wherein: a plurality of nano aeration heads which are uniformly distributed are arranged on the first annular aeration pipe (401) and the second annular aeration pipe (402), the first annular aeration pipe (401) is arranged on the inner side of the second annular aeration pipe (402), the blocking structure (9) comprises a middle blocking sheet (901) and a side blocking sheet (902), the middle blocking sheet (901) is arranged in an umbrella shape, the side blocking sheet (902) is arranged in an annular shape, and the diameter of the middle blocking sheet (901) is larger than that of the second annular aeration pipe (402).
4. The intelligent dissolved oxygen experimental facility as claimed in claim 3, wherein: the middle blocking piece (901) is provided with two pieces which are arranged between the large through hole (6) and the aeration device (4), the side blocking piece (902) is annularly arranged on the side wall of the experimental water pool (1), and the middle blocking piece (901) and the side blocking piece (902) are both inclined downwards.
5. The intelligent dissolved oxygen experimental facility as claimed in claim 1, wherein: be provided with dissolved oxygen monitor probe (10) in experimental box (2), dissolved oxygen monitor probe (10) are connected with external control platform (3) electricity for the concentration of dissolved oxygen in the real-time supervision experimental box and send concentration data for control platform (3), control platform (3) are including start button (303), stop button (302), inside PLC and touch-sensitive screen (301).
6. The intelligent dissolved oxygen experimental facility as claimed in claim 5, wherein: the oxygen flow control valve (4031) and the nitrogen flow control valve (4041) are electrically connected with the console (3) and are used for monitoring the gas flow entering the experimental water pool (1), sending flow data to a PLC in the console (3) and controlling the flow data by the PLC.
7. The intelligent dissolved oxygen experimental facility as claimed in claim 5, wherein: touch-sensitive screen (301) are connected with the PLC electricity, be provided with real-time concentration display area, target concentration display area, gas flow display area and error zone on touch-sensitive screen (301), real-time concentration display area is used for showing the current dissolved oxygen concentration in the experimental box, target concentration display area is used for showing and inputs artifical appointed target concentration, gas flow display area is used for showing the gas flow that nitrogen gas and oxygen got into the experimental water pond, the error zone is used for the error percentage that real-time concentration of manual input and target concentration can allow to exist.
8. The intelligent dissolved oxygen experimental facility as claimed in claim 7, wherein: the PLC reads the numerical value of a target concentration display area on the touch screen (301), compares and calculates the target concentration and the real-time concentration returned by the dissolved oxygen monitoring probe (10) through a numerical value comparison unit, and controls the oxygen flow control valve (4031) and the nitrogen flow control valve (4041) to regulate the gas flow through the PLC.
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| CN202210189043.3A CN114563543B (en) | 2022-02-28 | 2022-02-28 | Dissolved oxygen intelligent experimental device |
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| CN202210189043.3A CN114563543B (en) | 2022-02-28 | 2022-02-28 | Dissolved oxygen intelligent experimental device |
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| CN117256479A (en) * | 2023-11-22 | 2023-12-22 | 上海科缔联科技有限公司 | Industrial automatic biological reaction device and control method thereof |
| CN117256478A (en) * | 2023-11-22 | 2023-12-22 | 上海科缔联科技有限公司 | Continuous fermentation culture system for plant tissues |
| CN117256478B (en) * | 2023-11-22 | 2024-02-02 | 上海科缔联科技有限公司 | Continuous fermentation culture system for plant tissues |
| CN117256479B (en) * | 2023-11-22 | 2024-02-06 | 上海科缔联科技有限公司 | Industrial automatic biological reaction device and control method thereof |
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| CN114563543B (en) | 2023-09-29 |
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