CN119040959B - An automatic monitoring system for water electrolysis hydrogen production - Google Patents
An automatic monitoring system for water electrolysis hydrogen production Download PDFInfo
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- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 35
- 239000001257 hydrogen Substances 0.000 title claims abstract description 33
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 33
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000012544 monitoring process Methods 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 128
- 238000001514 detection method Methods 0.000 claims abstract description 111
- 239000003792 electrolyte Substances 0.000 claims abstract description 66
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000002360 preparation method Methods 0.000 claims description 35
- 238000012545 processing Methods 0.000 claims description 13
- 238000005452 bending Methods 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 5
- 230000001105 regulatory effect Effects 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
- C25B15/023—Measuring, analysing or testing during electrolytic production
- C25B15/025—Measuring, analysing or testing during electrolytic production of electrolyte parameters
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/04—Regulation of the inter-electrode distance
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Automation & Control Theory (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention discloses an automatic monitoring system for hydrogen production by water electrolysis, which belongs to the technical field of monitoring systems and comprises a liquid level height detection and calculation module, a distance detection and calculation module, a deformation detection module, a height adjustment module, a distance adjustment module, an alarm module and the like. According to the invention, the height of the electrolyte liquid level at the current moment is obtained and is used as a basis to regulate the height of the electrode plates and the spacing of the electrode plates at the same time, so that the phenomenon that the electrode plates are partially exposed out of the liquid level due to the fact that the liquid level is reduced after electrolyte consumption is avoided as far as possible, the electrolytic efficiency is effectively ensured, the spacing of the electrode plates can be timely regulated after the electrolyte is reduced, the spacing between the two electrode plates is reduced, the electrolytic efficiency can be further ensured to be maintained at a higher level, whether the lower parts of the electrode plates are bent along the axial direction or not can be judged according to the electrode plate images, and an alarm is given to remind operators to timely process when the lower parts of the electrode plates are bent along the axial direction.
Description
Technical Field
The invention relates to the technical field of monitoring systems, in particular to an automatic monitoring system for water electrolysis hydrogen production.
Background
Water electrolysis hydrogen production is a common and simpler method for preparing hydrogen. And D, introducing direct current into the electrolytic tank filled with the electrolyte, and enabling water molecules to undergo electrochemical reaction on the electrodes to be decomposed into hydrogen and oxygen. When direct current is applied to some electrolyte aqueous solutions, decomposed substances are completely irrelevant to the original electrolyte, water serving as a solvent is decomposed, and the original electrolyte remains in the water. Such as sulfuric acid, sodium hydroxide, potassium hydroxide, etc., all belong to this class of electrolytes. When water is electrolyzed, the ionization degree of pure water is small, the electric conductivity is low, and the electrolyte is a typical weak electrolyte, so the electrolyte is needed to be added to increase the electric conductivity of the solution, so that the water can be successfully decomposed into hydrogen and oxygen.
The water electrolysis hydrogen production device mainly comprises an electrolytic tank, a power supply, two electrode plates and a hydrogen collection assembly, wherein electrolyte solution is filled in the electrolytic tank, the two electrode plates are inserted into the electrolytic tank and are respectively connected with two poles of the power supply, so that electrolysis work is performed, when the electrolysis work is performed, gases generated by an anode and a cathode are respectively oxygen and hydrogen, when the hydrogen is collected, mixed gases formed by the oxygen and the hydrogen can be introduced into the hydrogen collection assembly for collection, and the hydrogen collection assembly can separate and collect the hydrogen from the mixed gases by adopting an active carbon adsorption method or a drying agent adsorption method.
In the electrolysis process, the positions of the two electrode plates can directly influence the electrolysis efficiency, and how to monitor the positions of the two electrode plates is a problem to be solved urgently.
Disclosure of Invention
The invention aims to solve the technical problem of monitoring the positions of two electrode plates, so as to realize the adjustment of the positions of the electrode plates, thereby ensuring that the electrolysis efficiency is maintained at a higher level, and providing an automatic monitoring system for water electrolysis hydrogen production.
The invention solves the technical problems through the following technical scheme that the device comprises a liquid level height detection and calculation module, a distance detection and calculation module, a deformation detection module, a height adjustment module, a distance adjustment module and an alarm module;
The liquid level detection and calculation module is used for detecting and calculating the liquid level of the electrolyte at the current moment, and is recorded as h Liquid and its preparation method and sent to the height adjustment module and the interval adjustment module;
The interval detection and calculation module is used for acquiring an electrode plate image, acquiring the interval between two electrode plates at the current moment according to the electrode plate image, marking the interval as d Pole piece , and sending the interval to the interval adjustment module;
the deformation detection module is used for judging whether the lower part of the electrode slice is bent along the axial direction according to the electrode slice image, and sending a judgment result to the alarm module;
The height adjusting module is used for synchronously adjusting the heights of the two electrode plates according to the liquid level height h Liquid and its preparation method of the electrolyte at the current moment;
The interval adjusting module is used for adjusting the interval d Pole piece between the two electrode plates according to the electrolyte liquid level height h Liquid and its preparation method at the current moment;
and the alarm module is used for selecting whether to alarm according to the judgment result of the deformation detection module, and reminding operators of timely processing the electrode plates.
The liquid level detection and calculation module further comprises an ultrasonic detection unit and a liquid level calculation unit, wherein the ultrasonic detection unit is arranged above the electrolyte liquid level, sends ultrasonic signals to the electrolyte liquid level along the vertical direction, receives echo signals, further calculates and obtains the vertical distance between the ultrasonic detection unit and the electrolyte liquid level at the current moment, and marks the vertical distance as h 1, and the liquid level calculation unit is used for performing difference processing with h 1 according to the vertical distance h 0 between the ultrasonic detection unit and the inner bottom surface of the electrolytic tank to obtain the electrolyte liquid level height h Liquid and its preparation method at the current moment, wherein the calculation formula is h Liquid and its preparation method =h1-h0.
The distance detection and calculation module further comprises an image acquisition unit, a connection part identification unit and a distance calculation unit, wherein the image acquisition unit is used for shooting two electrode plates from the right front of the electrolytic cell by an industrial camera to acquire images comprising the two electrode plates and two connection parts, namely electrode plate images, the connection part identification unit is used for identifying the two connection parts in the electrode plate images through a first target identification model to acquire upper left corner coordinates and lower right corner coordinates of the two connection part detection frames, and the distance calculation unit is used for calculating and acquiring the distance between the two connection parts according to the upper left corner coordinates and lower right corner coordinates of the two connection part detection frames to be regarded as a distance d Pole piece between the two electrode plates.
Further, the processing procedure of the interval calculating unit is as follows:
S11, calculating according to the coordinates of the upper left corner and the lower right corner of the two connecting part detection frames to obtain the coordinates of the central points of the two connecting part detection frames, wherein the two central points are respectively marked as K 1、K2;
the distance between the center points K 1、K2 in the image, i.e., the distance between the two connection portions, is calculated S12 as the distance d Pole piece between the two electrode pads.
The deformation detection module comprises a pole piece side face recognition unit and an axial bending judgment unit, wherein the pole piece side face recognition unit is used for recognizing the side faces of two electrode pieces in an electrode piece image through a second target recognition model to obtain coordinates of an upper left corner point and a lower right corner point of two electrode piece side face detection frames, and the axial bending judgment unit is used for judging whether the lower part of the electrode piece is bent along the axial direction according to the coordinates of the upper left corner point and the lower right corner point of the two electrode piece side face detection frames and sending a judgment result to the alarm module.
Further, the axial bending determination unit has the following processing procedures:
S21, determining the positions of the electrode slice side detection frames according to the coordinates of the upper left corner and the lower right corner of the two electrode slice side detection frames, and detecting the side outlines of the electrode slices in the two electrode slice side detection frames by using an outline detection function in OpenCV to obtain the coordinates of each point on the side outline of the electrode slice;
S22, in the electrode plate side detection frame positioned on the left side, firstly traversing coordinates of each point on the electrode plate side contour line in the detection frame by taking the upper right corner point of the electrode plate side detection frame as a reference, calculating the distance between each point coordinate on the contour line and the upper right corner point, obtaining a point on the contour line closest to the upper right corner point, marking the point as a first characteristic point m 1, traversing coordinates of each point on the electrode plate side contour line in the detection frame by taking the lower right corner point of the electrode plate side detection frame as a reference, calculating the distance between each point coordinate on the contour line and the lower right corner point, obtaining a point on the contour line closest to the lower right corner point, and marking the point as a second characteristic point m 2;
S23, in the electrode plate side detection frame positioned on the right side, firstly traversing coordinates of each point on the electrode plate side contour line in the detection frame by taking the upper left corner point of the electrode plate side detection frame as a reference, calculating the distance between each point coordinate on the contour line and the upper left corner point, obtaining a point on the contour line closest to the upper left corner point, marking the point as a third characteristic point n 1, traversing coordinates of each point on the electrode plate side contour line in the detection frame by taking the lower left corner point of the electrode plate side detection frame as a reference, calculating the distance between each point coordinate on the contour line and the lower left corner point, obtaining a point on the contour line closest to the lower left corner point, and marking the point as a fourth characteristic point n 2;
S24, calculating the length of the line segment m 1n1 in the image, which is marked as L 1, and simultaneously calculating the length of the line segment m 2n2 in the image, which is marked as L 2;
And S25, calculating the length difference between the L 2 and the L 1, recording as L Difference of difference , comparing the L Difference of difference with a set threshold L Setting up , judging that the lower part of the electrode plate is bent along the axial direction when the L Difference of difference is larger than or equal to the set threshold L Setting up , and otherwise judging that the lower part of the electrode plate is not bent along the axial direction.
The height adjusting module further comprises a first searching unit and a height adjusting unit, wherein the first searching unit is used for searching and comparing in a liquid level range-pole piece height database according to the liquid level h Liquid and its preparation method of the electrolyte at the current moment, acquiring the pole piece height u corresponding to the liquid level range of the electrolyte liquid level h Liquid and its preparation method at the current moment, the pole piece height u is the vertical distance between the bottom surface of the electrode piece and the bottom surface inside the electrolytic tank, the corresponding relation between the liquid level range of the electrolyte liquid level h Liquid and its preparation method at the current moment and the pole piece height u is preset in the liquid level range-pole piece height database, and the height adjusting unit is used for synchronously adjusting the heights of the two electrode pieces respectively by utilizing the two first cylinders according to the acquired pole piece height u.
Further, the height adjusting unit has the following processing procedures:
S31, acquiring the pole piece height u, and acquiring the height positions p 1 of the cylinder columns of the two vertically arranged first cylinders, wherein the height positions p 1 of the cylinder columns of the first cylinders are in one-to-one correspondence with the pole piece height u;
and S32, controlling cylinder columns of the two first cylinders to synchronously descend to a height position p 1, so that the two electrode plates connected with the cylinder columns of the first cylinders through the connecting parts synchronously descend to a plate height u, and synchronously adjusting the heights of the two electrode plates.
The distance adjusting module further comprises a second searching unit and a distance adjusting unit, wherein the second searching unit is used for searching and comparing in a liquid level range-pole piece distance database according to the liquid level h Liquid and its preparation method of the electrolyte at the current moment, the pole piece distance d corresponding to the liquid level range to which the liquid level h Liquid and its preparation method of the electrolyte at the current moment belongs is obtained, the pole piece distance d is the distance between two connecting parts connected with the corresponding electrode pieces and is regarded as the distance between the pole pieces, the corresponding relation between the liquid level range to which the liquid level h Liquid and its preparation method of the electrolyte at the current moment belongs and the pole piece distance d is preset in the liquid level range-pole piece distance database, and the distance adjusting unit is used for adjusting the distance d Pole piece between the two electrode pieces by utilizing synchronous actions of the two second cylinders according to the obtained pole piece distance d.
Further, the processing procedure of the interval adjusting unit is as follows:
S41, acquiring a pole piece spacing d, and acquiring positions p 2 to which cylinder columns of two second cylinders need to advance according to the pole piece spacing d, wherein the positions p 2 to which the cylinder columns of the second cylinders advance are in one-to-one correspondence with the pole piece spacing d;
And S42, controlling cylinder columns of two horizontally arranged second cylinders to synchronously advance to a position p 2, so that the distance between two connecting parts respectively connected with the two electrode plates is the pole piece distance d, and adjusting the distance d Pole piece between the two electrode plates.
Compared with the prior art, the automatic monitoring system for the water electrolysis hydrogen production has the advantages that the height of the electrolyte liquid level at the current moment is obtained and is used as a basis to adjust the height of the electrode plates and the spacing of the electrode plates at the same time, so that the phenomenon that the electrode plates are partially exposed out of the liquid level due to the fact that the liquid level is reduced after the electrolyte is consumed is avoided as far as possible, the electrolysis efficiency is effectively ensured, the spacing between the electrode plates can be timely adjusted after the electrolyte is reduced, the spacing between the two electrode plates is reduced, the electrolysis efficiency can be further ensured to be maintained at a higher level, whether the lower parts of the electrode plates are bent along the axial direction or not can be judged according to the electrode plate images, and an alarm is given to remind operators to timely process when the lower parts of the electrode plates are bent along the axial direction.
Drawings
FIG. 1 is a schematic diagram of an automated monitoring system for water electrolysis hydrogen production in accordance with an embodiment of the present invention;
FIG. 2 is an example of a local electrode slice image at mid-distance calculation in an embodiment of the present invention;
FIG. 3 is an example of a partial electrode sheet image when judging axial bending in the embodiment of the present invention (the left electrode sheet does not bend in the axial direction in the figure, and the lower portion of the right electrode sheet bends slightly in the axial direction);
FIG. 4 is a schematic view (front view) of a partial structure of a water electrolysis hydrogen plant according to an embodiment of the invention.
Detailed Description
The following describes in detail the examples of the present invention, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of protection of the present invention is not limited to the following examples.
As shown in fig. 1-4, the embodiment provides a technical scheme that an automatic monitoring system for water electrolysis hydrogen production comprises a liquid level height detection and calculation module, a distance detection and calculation module, a deformation detection module, a height adjustment module, a distance adjustment module and an alarm module;
In the embodiment, the liquid level detection and calculation module is used for detecting and calculating the liquid level of the electrolyte at the current moment, which is recorded as h Liquid and its preparation method , sending the liquid level h Liquid and its preparation method of the electrolyte at the current moment to the height adjustment module and the interval adjustment module for adjusting the positions of the subsequent electrode plates (the heights of the two electrode plates and the interval between the two electrode plates) according to the adjustment, and adjusting the heights of the electrode plates and the interval between the electrode plates according to the obtained liquid level of the electrolyte at the current moment, so that the phenomenon that the liquid level is exposed due to the reduction of the liquid level after the consumption of the electrolyte is avoided as far as possible, the electrolytic efficiency is effectively ensured, the interval between the electrode plates can be timely adjusted after the electrolyte is reduced, the interval between the two electrode plates is reduced, and the electrolytic efficiency can be further ensured to be maintained at a higher level;
The liquid level detection and calculation module comprises an ultrasonic detection unit and a liquid level calculation unit, wherein the ultrasonic detection unit is arranged above the electrolyte liquid level, sends ultrasonic signals to the electrolyte liquid level along the vertical direction, receives echo signals, further calculates and obtains the vertical distance between the ultrasonic detection unit and the electrolyte liquid level at the current moment, marks h 1, sends h 1 to the liquid level calculation unit, and is used for performing difference processing with h 1 according to the vertical distance h 0 between the ultrasonic detection unit and the inner bottom surface of the electrolyte tank to obtain the electrolyte liquid level h Liquid and its preparation method at the current moment, and the calculation formula is h Liquid and its preparation method =h1-h0.
More specifically, the ultrasonic detection unit is a noncontact ultrasonic sensor.
In this embodiment, the interval detection calculation module is configured to obtain an electrode slice image, obtain an interval between two electrode slices at a current moment according to the electrode slice image, record the interval as d Pole piece , and send an interval d Pole piece between two electrode slices at the current moment to the interval adjustment module, where the interval adjustment module is configured to adjust the interval between the two electrode slices according to the adjustment basis;
The distance detection and calculation module comprises an image acquisition unit, a connection part identification unit and a distance calculation unit, wherein the image acquisition unit is used for shooting two electrode plates from the right front of an electrolytic cell by an industrial camera, acquiring images comprising the two electrode plates and two connection parts, namely electrode plate images, and sending the electrode plate images to the connection part identification unit, the connection part identification unit is used for identifying the two connection parts in the electrode plate images through a trained first target identification model, acquiring coordinates of left upper corner points and right lower corner points of the two connection part detection frames, and sending the coordinates of the left upper corner points and the right lower corner points of the two connection part detection frames to the distance calculation unit, and the distance calculation unit is used for calculating and acquiring the distance between the two connection parts according to the coordinates of the left upper corner points and the right lower corner points of the two connection part detection frames, and is regarded as a distance d Pole piece between the two electrode plates.
More specifically, the industrial camera is arranged at the middle position right in front of the electrolytic bath, and the optical axis of the industrial camera is horizontally arranged.
More specifically, the connecting portion is located at the upper end of the electrode plate, and in the initial state, the axis of the connecting portion coincides with the axis of the electrode plate.
More specifically, the first object recognition model is based on SSD network training.
More specifically, the processing procedure of the pitch calculation unit (see fig. 2) is as follows:
S11, calculating according to the coordinates of the upper left corner and the lower right corner of the two connecting part detection frames to obtain the coordinates of the central points of the two connecting part detection frames, wherein the two central points are respectively marked as K 1、K2;
the distance between the center points K 1、K2 in the image, i.e., the distance between the two connection portions, is calculated S12 as the distance d Pole piece between the two electrode pads.
In this embodiment, the deformation detection module is configured to determine whether the lower portion of the electrode slice is bent along the axial direction according to the electrode slice image, and send a determination result to the alarm module, where the determination result is used as a basis for whether to alarm.
In the electrolysis operation for a long period of time, heat is generated when a current passes through the electrode sheet, and the electrode sheet is highly likely to be deformed by overheating. In addition, the gas generated during the electrolysis process also applies pressure to the electrode plate, and further causes deformation, wherein the deformation mainly refers to slight bending of the lower part of the electrode plate along the axial direction of the electrode plate, and the bent electrode plate can cause poor electrolysis efficiency.
The deformation detection module comprises a pole piece side face recognition unit and an axial bending judgment unit, wherein the pole piece side face recognition unit is used for recognizing the side faces of two pole pieces in a pole piece image through a trained second target recognition model, acquiring coordinates of an upper left corner point and a lower right corner point of the two pole piece side face detection frames, sending the coordinates of the upper left corner point and the lower right corner point of the two pole piece side face detection frames to the axial bending judgment unit, and judging whether the lower part of the pole piece is bent along the axial direction according to the coordinates of the upper left corner point and the lower right corner point of the two pole piece side face detection frames, and sending a judgment result to the alarm module.
More specifically, the second object recognition model is obtained based on YoLo V network training.
More specifically, the processing procedure (see fig. 3) of the axial bending determination unit is as follows:
S21, detecting the side profiles of the electrode plates in the two electrode plate side detection frames by using a profile detection function in OpenCV to obtain coordinates of each point on the side profile line of the electrode plate;
S22, in the electrode plate side detection frame positioned on the left side, firstly traversing coordinates of each point on the electrode plate side contour line in the detection frame by taking the upper right corner point of the electrode plate side detection frame as a reference, calculating the distance between each point coordinate on the contour line and the upper right corner point, obtaining a point on the contour line closest to the upper right corner point, marking the point as a first characteristic point m 1, traversing coordinates of each point on the electrode plate side contour line in the detection frame by taking the lower right corner point of the electrode plate side detection frame as a reference, calculating the distance between each point coordinate on the contour line and the lower right corner point, obtaining a point on the contour line closest to the lower right corner point, and marking the point as a second characteristic point m 2;
S23, in the electrode plate side detection frame positioned on the right side, firstly traversing coordinates of each point on the electrode plate side contour line in the detection frame by taking the upper left corner point of the electrode plate side detection frame as a reference, calculating the distance between each point coordinate on the contour line and the upper left corner point, obtaining a point on the contour line closest to the upper left corner point, marking the point as a third characteristic point n 1, traversing coordinates of each point on the electrode plate side contour line in the detection frame by taking the lower left corner point of the electrode plate side detection frame as a reference, calculating the distance between each point coordinate on the contour line and the lower left corner point, obtaining a point on the contour line closest to the lower left corner point, and marking the point as a fourth characteristic point n 2;
S24, calculating the length of the line segment m 1n1 in the image, which is marked as L 1, and simultaneously calculating the length of the line segment m 2n2 in the image, which is marked as L 2;
And S25, calculating the length difference between the L 2 and the L 1, recording as L Difference of difference , comparing the L Difference of difference with a set threshold L Setting up , judging that the lower part of the electrode plate is bent along the axial direction when the L Difference of difference is larger than or equal to the set threshold L Setting up , and otherwise judging that the lower part of the electrode plate is not bent along the axial direction.
In the present embodiment, the setting threshold L Setting up for determining whether the electrode sheet is bent in the axial direction is set according to the actual application requirement.
In this embodiment, the height adjustment module is configured to adjust the heights of the two electrode plates synchronously according to the electrolyte level height h Liquid and its preparation method at the current time.
The height adjusting module comprises a first searching unit and a height adjusting unit, wherein the first searching unit is used for searching and comparing in a liquid level height range-pole piece height database according to the liquid level height h Liquid and its preparation method of the electrolyte at the current moment, acquiring the pole piece height u corresponding to the liquid level height range to which the liquid level height h Liquid and its preparation method of the electrolyte at the current moment belongs, sending the pole piece height u into the height adjusting unit, wherein the pole piece height u is the vertical distance between the bottom surface of an electrode piece and the bottom surface inside an electrolytic tank, and the height adjusting unit is used for synchronously adjusting the heights of two electrode pieces respectively by utilizing two first cylinders according to the acquired pole piece height u.
More specifically, the corresponding relation between the liquid level height range of the electrolyte liquid level h Liquid and its preparation method at the current moment and the pole piece height u is preset in the liquid level height range-pole piece height database.
More specifically, the height adjusting unit is processed as follows:
S31, acquiring the height u of the pole piece, and acquiring the height positions p 1 of the cylinder columns of the two first cylinders, which are required to descend, according to the height u of the pole piece;
and S32, controlling cylinder columns of the two first cylinders to synchronously descend to a height position p 1, so that the two electrode plates connected with the cylinder columns of the first cylinders through the connecting parts synchronously descend to a plate height u, and synchronously adjusting the heights of the two electrode plates.
It should be noted that, the height position p 1 of the cylinder column of the first cylinder corresponds to the pole piece height u one by one, and is obtained through pre-calibration.
In this embodiment, the interval adjustment module is configured to adjust an interval d Pole piece between two electrode plates according to a level h Liquid and its preparation method of the electrolyte at a current time;
The spacing adjustment module comprises a second search unit and a spacing adjustment unit, wherein the second search unit is used for searching and comparing in a liquid level range-pole piece spacing database according to the liquid level h Liquid and its preparation method of the electrolyte at the current moment, acquiring the pole piece spacing d corresponding to the liquid level range to which the liquid level h Liquid and its preparation method of the electrolyte at the current moment belongs, sending the pole piece spacing d into the spacing adjustment unit, wherein the pole piece spacing d is the spacing between two connecting parts connected with corresponding electrode pieces and is regarded as the spacing between the pole pieces, and the spacing adjustment unit is used for adjusting the spacing d Pole piece between the two electrode pieces by utilizing synchronous action of two second cylinders according to the acquired pole piece spacing d.
More specifically, the corresponding relation between the liquid level height range of the electrolyte liquid level h Liquid and its preparation method at the current moment and the pole piece distance d is preset in the liquid level height range-pole piece distance database.
More specifically, the pitch adjustment unit is processed as follows:
S41, acquiring a pole piece distance d, and acquiring positions p 2 to which cylinder columns of two second cylinders need to advance according to the pole piece distance d;
And S42, controlling cylinder columns of the two second cylinders to synchronously advance to a position p 2, so that the distance between two connecting parts respectively connected with the two electrode plates is the pole piece distance d, namely, the distance d Pole piece between the two electrode plates is adjusted.
It should be noted that, the position p 2 where the cylinder column of the second cylinder advances corresponds to the pole piece distance d one by one, and is obtained through pre-calibration.
In this embodiment, the alarm module is configured to select whether to alarm according to a determination result of the deformation detection module, so as to remind an operator to replace the electrode pad in time.
More specifically, in the alarm module, when the judgment result of the deformation detection module is that the electrode plate bends along the axial direction, an alarm is given, otherwise, no alarm is given.
It should be noted that, the liquid level height detection calculation module, the interval detection calculation module and the deformation detection module detect once every set time interval, the upper end of the electrode slice can not expose the liquid level between the two detections, and the time interval is set according to the actual requirement. When the height and the interval are adjusted according to the height h Liquid and its preparation method of the electrolyte liquid level at the current moment, the height adjustment work is performed first, and then the interval adjustment work is performed.
As shown in fig. 4, in this embodiment, the automatic monitoring system for water electrolysis hydrogen production is further provided to monitor, and comprises an electrolytic tank 1 (vertically arranged), an electrode plate 2, a height adjusting unit, a distance adjusting unit, a sliding connecting frame 4, a non-contact ultrasonic sensor 41 and an external power supply, wherein the electrode plate 2 is vertically and just right inserted into electrolyte in the electrolytic tank 1, the sliding connecting frame 4 is horizontally arranged in the middle of the electrolytic tank 1 and above the electrolyte liquid level, both ends of the sliding connecting frame are fixedly connected with the inner wall of the electrolytic tank 1, the non-contact ultrasonic sensor 41 is arranged at the lower end of the sliding connecting frame 4, the electrode plate 2 is detachably connected with the height adjusting unit through a connecting part 6 (made of insulating materials), the distance adjusting unit is connected with the height adjusting unit, the height adjusting unit is slidably connected with the sliding connecting frame 4, and the external power supply is respectively electrically connected with the two electrode plates 2.
More specifically, the height adjusting unit includes a first cylinder 31 disposed vertically, a cylinder body of the first cylinder 31 is slidably connected with the sliding connection frame 4, a lower end of a cylinder column 32 (disposed vertically and coaxially connected with the connecting portion 6) is connected with an upper end of the electrode plate 2, the space adjusting unit includes a second cylinder 51 disposed horizontally, a cylinder body of the second cylinder 51 is fixedly connected with the outside of the electrolytic cell 1, and a cylinder column 52 penetrates through the electrolytic cell 1 and is connected with the first cylinder 31.
The industrial camera is fixed in front of the electrolytic tank 1, the front end of the electrolytic tank 1 is made of transparent material, the electrode plate 2 is a cuboid sheet, and the upper end of the electrode plate is immersed into electrolyte for a certain distance in an initial state.
In summary, in the automated monitoring system for water electrolysis hydrogen production according to the above embodiment, the height of the electrode plate and the electrode plate spacing are adjusted simultaneously by acquiring the height of the electrolyte liquid level at the current moment, so that the phenomenon that the electrode plate part is exposed out of the liquid level due to the reduction of the liquid level after the electrolyte is consumed is avoided as much as possible, the electrolysis efficiency is effectively ensured, the electrode plate spacing can be adjusted in time after the electrolyte is reduced, the spacing between the two electrode plates is reduced, the electrolysis efficiency can be further ensured to be maintained at a higher level, and the electrode plate image can be used for judging whether the lower part of the electrode plate is bent along the axial direction or not, and an alarm is given to remind operators to process in time when the lower part of the electrode plate is bent along the axial direction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. An automatic monitoring system for water electrolysis hydrogen production is characterized by comprising a liquid level height detection and calculation module, a distance detection and calculation module, a deformation detection module, a height adjustment module, a distance adjustment module and an alarm module;
The liquid level detection and calculation module is used for detecting and calculating the liquid level of the electrolyte at the current moment, and is recorded as h Liquid and its preparation method and sent to the height adjustment module and the interval adjustment module;
The interval detection and calculation module is used for acquiring an electrode plate image, acquiring the interval between two electrode plates at the current moment according to the electrode plate image, marking the interval as d Pole piece , and sending the interval to the interval adjustment module;
the deformation detection module is used for judging whether the lower part of the electrode slice is bent along the axial direction according to the electrode slice image, and sending a judgment result to the alarm module;
The height adjusting module is used for synchronously adjusting the heights of the two electrode plates according to the liquid level height h Liquid and its preparation method of the electrolyte at the current moment;
The interval adjusting module is used for adjusting the interval d Pole piece between the two electrode plates according to the electrolyte liquid level height h Liquid and its preparation method at the current moment;
and the alarm module is used for selecting whether to alarm according to the judgment result of the deformation detection module, and reminding operators of timely processing the electrode plates.
2. The automated monitoring system for hydrogen production by water electrolysis according to claim 1, wherein the liquid level detection and calculation module comprises an ultrasonic detection unit and a liquid level calculation unit, wherein the ultrasonic detection unit is arranged above the liquid level of the electrolyte, transmits ultrasonic signals to the liquid level of the electrolyte in the vertical direction, receives echo signals, further calculates and obtains the vertical distance between the ultrasonic detection unit and the liquid level of the electrolyte at the current moment, and marks the vertical distance as h 1, and the liquid level calculation unit is used for performing difference processing with h 1 according to the vertical distance h 0 between the ultrasonic detection unit and the bottom surface inside the electrolyte to obtain the liquid level h Liquid and its preparation method of the electrolyte at the current moment, wherein the calculation formula is h Liquid and its preparation method =h1-h0.
3. The automated monitoring system for water electrolysis hydrogen production, which is disclosed in claim 1, is characterized in that the distance detection calculation module comprises an image acquisition unit, a connection part identification unit and a distance calculation unit, wherein the image acquisition unit is used for shooting two electrode plates from the right front of an electrolytic cell by an industrial camera to acquire images comprising the two electrode plates and two connection parts, namely electrode plate images, the connection part identification unit is used for identifying the two connection parts in the electrode plate images through a first target identification model to acquire upper left corner coordinates and lower right corner coordinates of two connection part detection frames, and the distance calculation unit is used for calculating and acquiring the distance between the two connection parts according to the upper left corner coordinates and the lower right corner coordinates of the two connection part detection frames to be regarded as a distance d Pole piece between the two electrode plates.
4. The automated monitoring system for hydrogen production by water electrolysis according to claim 3, wherein the processing procedure of the interval calculating unit is as follows:
S11, calculating according to the coordinates of the upper left corner and the lower right corner of the two connecting part detection frames to obtain the coordinates of the central points of the two connecting part detection frames, wherein the two central points are respectively marked as K 1、K2;
the distance between the center points K 1、K2 in the image, i.e., the distance between the two connection portions, is calculated S12 as the distance d Pole piece between the two electrode pads.
5. The automated monitoring system for hydrogen production by water electrolysis according to claim 4, wherein the deformation detection module comprises a pole piece side face recognition unit and an axial bending judgment unit, wherein the pole piece side face recognition unit is used for recognizing the side faces of two electrode pieces in an electrode piece image through a second target recognition model to obtain coordinates of an upper left corner point and a lower right corner point of the two electrode piece side face detection frames, and the axial bending judgment unit is used for judging whether the lower parts of the electrode pieces are bent along the axial direction according to the coordinates of the upper left corner point and the lower right corner point of the two electrode piece side face detection frames and sending judgment results to the alarm module.
6. The automated monitoring system for hydrogen production by water electrolysis according to claim 5, wherein the axial bending judgment unit comprises the following processing steps:
S21, determining the positions of the electrode slice side detection frames according to the coordinates of the upper left corner and the lower right corner of the two electrode slice side detection frames, and detecting the side outlines of the electrode slices in the two electrode slice side detection frames by using an outline detection function in OpenCV to obtain the coordinates of each point on the side outline of the electrode slice;
S22, in the electrode plate side detection frame positioned on the left side, firstly traversing coordinates of each point on the electrode plate side contour line in the detection frame by taking the upper right corner point of the electrode plate side detection frame as a reference, calculating the distance between each point coordinate on the contour line and the upper right corner point, obtaining a point on the contour line closest to the upper right corner point, marking the point as a first characteristic point m 1, traversing coordinates of each point on the electrode plate side contour line in the detection frame by taking the lower right corner point of the electrode plate side detection frame as a reference, calculating the distance between each point coordinate on the contour line and the lower right corner point, obtaining a point on the contour line closest to the lower right corner point, and marking the point as a second characteristic point m 2;
S23, in the electrode plate side detection frame positioned on the right side, firstly traversing coordinates of each point on the electrode plate side contour line in the detection frame by taking the upper left corner point of the electrode plate side detection frame as a reference, calculating the distance between each point coordinate on the contour line and the upper left corner point, obtaining a point on the contour line closest to the upper left corner point, marking the point as a third characteristic point n 1, traversing coordinates of each point on the electrode plate side contour line in the detection frame by taking the lower left corner point of the electrode plate side detection frame as a reference, calculating the distance between each point coordinate on the contour line and the lower left corner point, obtaining a point on the contour line closest to the lower left corner point, and marking the point as a fourth characteristic point n 2;
S24, calculating the length of the line segment m 1n1 in the image, which is marked as L 1, and simultaneously calculating the length of the line segment m 2n2 in the image, which is marked as L 2;
And S25, calculating the length difference between the L 2 and the L 1, recording as L Difference of difference , comparing the L Difference of difference with a set threshold L Setting up , judging that the lower part of the electrode plate is bent along the axial direction when the L Difference of difference is larger than or equal to the set threshold L Setting up , and otherwise judging that the lower part of the electrode plate is not bent along the axial direction.
7. The automated monitoring system for hydrogen production by water electrolysis according to claim 6, wherein the height adjusting module comprises a first searching unit and a height adjusting unit, the first searching unit is used for searching and comparing in a liquid level height range-pole piece height database according to the liquid level height h Liquid and its preparation method of the electrolyte at the current moment to obtain a pole piece height u corresponding to the liquid level height range to which the liquid level height h Liquid and its preparation method of the electrolyte at the current moment belongs, the pole piece height u is a vertical distance between the bottom surface of an electrode piece and the bottom surface inside an electrolytic tank, the corresponding relation between the liquid level height range to which the liquid level height h Liquid and its preparation method of the electrolyte at the current moment belongs and the pole piece height u is preset in the pole piece height database, and the height adjusting unit is used for synchronously adjusting the heights of two electrode pieces respectively by using two first air cylinders according to the obtained pole piece height u.
8. The automated monitoring system for hydrogen production by water electrolysis according to claim 7, wherein the height adjusting unit comprises the following steps:
S31, acquiring the pole piece height u, and acquiring the height positions p 1 of the cylinder columns of the two vertically arranged first cylinders, wherein the height positions p 1 of the cylinder columns of the first cylinders are in one-to-one correspondence with the pole piece height u;
and S32, controlling cylinder columns of the two first cylinders to synchronously descend to a height position p 1, so that the two electrode plates connected with the cylinder columns of the first cylinders through the connecting parts synchronously descend to a plate height u, and synchronously adjusting the heights of the two electrode plates.
9. The automatic monitoring system for the water electrolysis hydrogen production, which is disclosed in claim 8, is characterized in that the interval adjusting module comprises a second searching unit and an interval adjusting unit, wherein the second searching unit is used for searching and comparing in a liquid level height range-pole piece interval database according to the liquid level height h Liquid and its preparation method of the electrolyte at the current moment, obtaining a pole piece interval d corresponding to a liquid level height range to which the liquid level height h Liquid and its preparation method of the electrolyte at the current moment belongs, wherein the pole piece interval d is an interval between two connecting parts connected with corresponding electrode pieces, and is regarded as an interval between pole pieces, the corresponding relation between the liquid level height range to which the liquid level height h Liquid and its preparation method of the electrolyte at the current moment belongs and the pole piece interval d is preset in the liquid level height range-pole piece interval database, and the interval adjusting unit is used for adjusting an interval d Pole piece between the two electrode pieces by utilizing synchronous actions of the two second cylinders according to the obtained pole piece interval d.
10. The automated monitoring system for hydrogen production by water electrolysis according to claim 9, wherein the pitch adjustment unit comprises the following steps:
S41, acquiring a pole piece spacing d, and acquiring positions p 2 to which cylinder columns of two second cylinders need to advance according to the pole piece spacing d, wherein the positions p 2 to which the cylinder columns of the second cylinders advance are in one-to-one correspondence with the pole piece spacing d;
And S42, controlling cylinder columns of two horizontally arranged second cylinders to synchronously advance to a position p 2, so that the distance between two connecting parts respectively connected with the two electrode plates is the pole piece distance d, and adjusting the distance d Pole piece between the two electrode plates.
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| CN1515880A (en) * | 1999-05-20 | 2004-07-28 | ������������ʽ���� | Piezoelectric device for liquid detection, liquid container and mounting module body |
| CN112981437A (en) * | 2021-02-07 | 2021-06-18 | 阳光电源股份有限公司 | Water electrolysis hydrogen production system and gas purity control method thereof |
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| KR20220145401A (en) * | 2020-12-11 | 2022-10-28 | 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 | Batteries, electrical devices and battery manufacturing methods |
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| CN1515880A (en) * | 1999-05-20 | 2004-07-28 | ������������ʽ���� | Piezoelectric device for liquid detection, liquid container and mounting module body |
| CN112981437A (en) * | 2021-02-07 | 2021-06-18 | 阳光电源股份有限公司 | Water electrolysis hydrogen production system and gas purity control method thereof |
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