An automatic monitoring system for hydrogen production by water electrolysis

Abstract

The present invention discloses an automatic monitoring system for water electrolysis hydrogen production, which belongs to the technical field of monitoring systems, and includes a liquid level detection and calculation module, a spacing detection and calculation module, a deformation detection module, a height adjustment module, a spacing adjustment module, and an alarm module, etc. The present invention obtains the electrolyte liquid level at the current moment, and uses it as a basis to adjust the height and spacing of the electrode sheets at the same time, thereby avoiding as much as possible the phenomenon that the electrode sheets are partially exposed from the liquid surface due to the lowering of the liquid level after the electrolyte is consumed, so that the electrolysis efficiency is effectively guaranteed, and the spacing of the electrode sheets can be adjusted in time after the electrolyte is reduced, and the spacing between the two electrode sheets can be reduced, which can further ensure that the electrolysis efficiency can be maintained at a higher level; and it can judge whether the lower part of the electrode sheet is bent along the axial direction according to the electrode sheet image, and when the lower part of the electrode sheet is bent along the axial direction, an alarm is issued to remind the operator to handle it in time.

Description

Technical Field

[0001] The invention relates to the technical field of monitoring systems, and in particular to an automatic monitoring system for producing hydrogen by water electrolysis. Background Art

[0002] Hydrogen production by water electrolysis is a common and relatively simple method of producing hydrogen. When direct current is passed through an electrolytic cell filled with electrolyte, water molecules undergo electrochemical reactions on the electrodes and decompose into hydrogen and oxygen. When direct current is passed through some aqueous electrolyte solutions, the decomposed substances have nothing to do with the original electrolytes. What is decomposed is the water as a solvent, and the original electrolyte remains in the water. For example, sulfuric acid, sodium hydroxide, potassium hydroxide, etc. all belong to this type of electrolyte. When electrolyzing water, since pure water has a very low degree of ionization and low conductivity, it is a typical weak electrolyte, so the aforementioned electrolyte needs to be added to increase the conductivity of the solution so that water can be smoothly electrolyzed into hydrogen and oxygen.

[0003] The water electrolysis hydrogen production device mainly includes an electrolytic cell, a power supply, two electrode sheets, and a hydrogen collection component. The electrolytic cell contains an electrolyte solution, and the two electrode sheets are inserted into the electrolytic cell and respectively connected to the two poles of the power supply to perform electrolysis. When the electrolysis is in progress, the gases generated by the anode and the cathode are oxygen and hydrogen, respectively. When collecting hydrogen, the mixed gas formed by oxygen and hydrogen can be passed into the hydrogen collection component for collection. The hydrogen collection component can use activated carbon adsorption method or desiccant adsorption method to separate and collect hydrogen from the mixed gas.

[0004] During the electrolysis process, the positions of the two electrode sheets will directly affect the electrolysis efficiency. How to monitor the positions of the two electrode sheets is an urgent problem to be solved. To this end, an automatic monitoring system for water electrolysis hydrogen production is proposed. Summary of the invention

[0005] The technical problem to be solved by the present invention is: how to monitor the positions of two electrode sheets and then adjust the positions of the electrode sheets to ensure that the electrolysis efficiency is maintained at a high level, and provide an automatic monitoring system for water electrolysis hydrogen production.

[0006] The present invention solves the above technical problems through the following technical solutions, and the present invention includes a liquid level detection and calculation module, a spacing detection and calculation module, a deformation detection module, a height adjustment module, a spacing adjustment module and an alarm module;

[0007] The liquid level detection and calculation module is used to detect and calculate the electrolyte liquid level at the current moment, which is recorded as h 液 and send it to the height adjustment module and the spacing adjustment module;

[0008] The spacing detection calculation module is used to obtain the electrode sheet image and obtain the spacing between the two electrode sheets at the current moment according to the electrode sheet image, which is recorded as d 极片 , and send it to the spacing adjustment module;

[0009] The deformation detection module is used to determine whether the lower part of the electrode sheet is bent along the axial direction according to the electrode sheet image, and send the determination result to the alarm module;

[0010] The height adjustment module is used to adjust the electrolyte level h according to the current moment. 液 The heights of the two electrode sheets are adjusted synchronously;

[0011] The spacing adjustment module is used to adjust the electrolyte level h according to the current moment. 液 The distance d between the two electrodes 极片 Make adjustments;

[0012] The alarm module is used to select whether to issue an alarm according to the judgment result of the deformation detection module, so as to remind the operator to process the electrode sheet in time.

[0013] Furthermore, the liquid level detection and calculation module includes an ultrasonic detection unit and a liquid level calculation unit; the ultrasonic detection unit is arranged above the electrolyte level, sends an ultrasonic signal to the electrolyte level in a vertical direction, and receives an echo signal, and then obtains the vertical distance between the ultrasonic detection unit and the electrolyte level at the current moment by calculation, which is recorded as h 1 The liquid level calculation unit is used to calculate the liquid level according to the vertical distance h between the ultrasonic detection unit and the bottom surface of the electrolytic cell. 0 , and h 1 Perform subtraction to obtain the current electrolyte level h 液 , the calculation formula is: 液 =h 1 -h 0 .

[0014] Furthermore, the spacing detection and calculation module includes an image acquisition unit, a connection part recognition unit and a spacing calculation unit; the image acquisition unit is used for an industrial camera to shoot two electrode sheets from the front of the electrolytic cell to obtain an image containing two electrode sheets and two connection parts, that is, an electrode sheet image; the connection part recognition unit is used to recognize the two connection parts in the electrode sheet image through a first target recognition model to obtain the coordinates of the upper left corner point and the lower right corner point of the two connection part detection frames; the spacing calculation unit is used to calculate and obtain the spacing between the two connection parts according to the coordinates of the upper left corner point and the lower right corner point of the two connection part detection frames, which is regarded as the spacing d between the two electrode sheets. 极片 .

[0015] Furthermore, the processing process of the distance calculation unit is as follows:

[0016] S11: The coordinates of the center points of the two connection detection frames are calculated based on the coordinates of the upper left corner point and the lower right corner point of the two connection detection frames. The two center points are respectively denoted as K 1 , K 2 ;

[0017] S12: Calculate the center point K in the image 1 , K 2 The distance between the two connecting parts is the distance between the two electrode sheets. 极片 .

[0018] Furthermore, the deformation detection module includes a pole piece side recognition unit and an axial bending judgment unit; the pole piece side recognition unit is used to identify the sides of the two electrode pieces in the electrode piece image through the second target recognition model, and obtain the coordinates of the upper left corner and lower right corner points of the two electrode piece side detection frames; the axial bending judgment unit is used to judge whether the lower part of the electrode piece has axial bending according to the coordinates of the upper left corner and lower right corner points of the two electrode piece side detection frames, and send the judgment result to the alarm module.

[0019] Furthermore, the processing process of the axial bending judgment unit is as follows:

[0020] S21: determining the position of the electrode sheet side detection frame according to the coordinates of the upper left corner point and the lower right corner point of the two electrode sheet side detection frames, and detecting the electrode sheet side contours in the two electrode sheet side detection frames using the contour detection function in OpenCV to obtain the coordinates of each point on the electrode sheet side contour line;

[0021] S22: In the electrode sheet side detection frame located on the left, first use the upper right corner point of the electrode sheet side detection frame as a reference, traverse the coordinates of each point on the electrode sheet side contour line in the detection frame, calculate the distance between the coordinates of each point on the contour line and the upper right corner point, and obtain the point on the contour line closest to the upper right corner point, which is recorded as the first feature point m 1 , and then take the lower right corner point of the electrode sheet side detection frame as the reference, traverse the coordinates of each point on the electrode sheet side contour line in the detection frame, calculate the distance between the coordinates of each point on the contour line and the lower right corner point, and obtain the point on the contour line closest to the lower right corner point, which is recorded as the second feature point m 2 ;

[0022] S23: In the electrode sheet side detection frame located on the right, first use the upper left corner point of the electrode sheet side detection frame as a reference, traverse the coordinates of each point on the electrode sheet side contour line in the detection frame, calculate the distance between the coordinates of each point on the contour line and the upper left corner point, and obtain the point on the contour line closest to the upper left corner point, which is recorded as the third feature point n 1 , and then take the lower left corner point of the electrode sheet side detection frame as the reference, traverse the coordinates of each point on the electrode sheet side contour line in the detection frame, calculate the distance between the coordinates of each point on the contour line and the lower left corner point, and obtain the point on the contour line closest to the lower left corner point, which is recorded as the fourth feature point n 2 ;

[0023] S24: Calculate line segment m 1 n 1 The length in the image is denoted by L 1 , and calculate the line segment m 2 n 2 The length in the image is denoted by L 2 ;

[0024] S25: Calculate L 2 With L 1 The length difference between them is denoted as L 差 , L 差 With the threshold L set 设定 For comparison, when L 差 Greater than or equal to the set threshold L 设定 When the electrode sheet is bent in the axial direction, it is determined that the lower portion of the electrode sheet is bent in the axial direction; otherwise, it is determined that the lower portion of the electrode sheet is not bent in the axial direction.

[0025] Furthermore, the height adjustment module includes a first search unit and a height adjustment unit; the first search unit is used to determine the electrolyte level h at the current moment. 液 Search and compare in the liquid level height range-electrode height database to obtain the current electrolyte liquid level h 液 The electrode height u corresponding to the liquid level height range is the vertical distance between the bottom surface of the electrode and the bottom surface of the electrolytic cell. The electrolyte liquid level h at the current moment is preset in the liquid level height range-electrode height database. 液 The corresponding relationship between the liquid level height range and the electrode height u; the height adjustment unit is used to synchronously adjust the heights of the two electrode sheets using the two first cylinders according to the acquired electrode height u.

[0026] Furthermore, the processing process of the height adjustment unit is as follows:

[0027] S31: Obtain the pole piece height u, and obtain the height position p of the cylinder columns of the two vertically arranged first cylinders that need to be lowered according to the pole piece height u.1 , the height position p of the cylinder column of the first cylinder 1 One-to-one correspondence with the pole piece height u;

[0028] S32: Control the cylinders of the two first cylinders to descend synchronously to a height position p 1 , so that the two electrode sheets connected to the cylinder column of the first cylinder through the connecting part are synchronously dropped to the electrode sheet height u, that is, the heights of the two electrode sheets are synchronously adjusted.

[0029] Furthermore, the spacing adjustment module includes a second search unit and a spacing adjustment unit; the second search unit is used to adjust the spacing according to the current electrolyte liquid level h 液 Search and compare in the liquid level range-electrode spacing database to obtain the current electrolyte liquid level h 液 The electrode spacing d corresponding to the liquid level height range, the electrode spacing d is the distance between the two connecting parts connected to the corresponding electrode sheet, which is regarded as the distance between the electrode sheets. The liquid level height range-electrode spacing database is preset with the electrolyte liquid level h at the current moment 液 The corresponding relationship between the liquid level height range and the electrode spacing d; the spacing adjustment unit is used to adjust the spacing d between the two electrode sheets by using the two second cylinders to act synchronously according to the obtained electrode spacing d 极片 Make adjustments.

[0030] Furthermore, the processing process of the spacing adjustment unit is as follows:

[0031] S41: Obtain the pole piece spacing d, and obtain the position p to which the cylinder columns of the two second cylinders need to move according to the pole piece spacing d. 2 , the cylinder column of the second cylinder moves forward to position p 2 One-to-one correspondence with the pole piece spacing d;

[0032] S42: Control the cylinders of the two horizontally arranged second cylinders to move synchronously to position p 2 , so that the distance between the two connecting parts connected to the two electrode sheets is the electrode sheet distance d, that is, the distance d between the two electrode sheets is realized 极片 Make adjustments.

[0033] Compared with the prior art, the present invention has the following advantages: the automated monitoring system for hydrogen production by water electrolysis obtains the electrolyte liquid level at the current moment and uses it as a basis to adjust the height and spacing of the electrode sheets at the same time, thereby avoiding as much as possible the phenomenon that the electrode sheets are partially exposed from the liquid surface due to the lowering of the liquid level after the electrolyte is consumed, so that the electrolysis efficiency is effectively guaranteed. After the electrolyte is reduced, the spacing of the electrode sheets can be adjusted in time to reduce the spacing between the two electrode sheets, which can further ensure that the electrolysis efficiency can be maintained at a high level; and it can determine whether the lower part of the electrode sheet has axial bending according to the electrode sheet image. When the lower part of the electrode sheet has axial bending, an alarm is issued to remind the operator to deal with it in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the structure of the automated monitoring system for producing hydrogen by water electrolysis according to an embodiment of the present invention;

[0035] Figure 2 is an example of a local electrode sheet image when calculating the spacing in an embodiment of the present invention;

[0036] Figure 3 This is an example of a local electrode sheet image when judging axial bending in an embodiment of the present invention (the electrode sheet on the left side of the figure does not bend along the axial direction, and the lower part of the electrode sheet on the right side is slightly bent along the axial direction);

[0037] Figure 4 Schematic diagram of the partial structure of the water electrolysis hydrogen production device in an embodiment of the present invention (front view). DETAILED DESCRIPTION

[0038] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0039] like Figures 1 to 4 As shown, this embodiment provides a technical solution: an automated monitoring system for water electrolysis hydrogen production, including a liquid level detection and calculation module, a spacing detection and calculation module, a deformation detection module, a height adjustment module, a spacing adjustment module and an alarm module;

[0040] In this embodiment, the liquid level detection and calculation module is used to detect and calculate the electrolyte liquid level at the current moment, which is recorded as h 液 , and the electrolyte level at the current moment h 液, sent to the height adjustment module and the spacing adjustment module, and used as an adjustment basis for subsequent electrode sheet position adjustment (the height of the two electrode sheets, the spacing between the two electrode sheets); the present invention obtains the electrolyte liquid level at the current moment, and uses it as a basis to adjust the height of the electrode sheets and the spacing between the electrode sheets at the same time, thereby avoiding as much as possible the phenomenon that the electrode sheets are partially exposed from the liquid surface due to the lowering of the liquid level after the electrolyte is consumed, so that the electrolysis efficiency is effectively guaranteed, and the spacing between the electrode sheets can be adjusted in time after the electrolyte is reduced, and the spacing between the two electrode sheets can be reduced, which can further ensure that the electrolysis efficiency can be maintained at a high level;

[0041] More specifically, the liquid level detection and calculation module includes an ultrasonic detection unit and a liquid level calculation unit; the ultrasonic detection unit is arranged above the electrolyte level, sends an ultrasonic signal to the electrolyte level in a vertical direction, and receives an echo signal, and then obtains the vertical distance between the ultrasonic detection unit and the electrolyte level at the current moment by calculation, which is recorded as h 1 , and h 1 The liquid level calculation unit is used to calculate the liquid level according to the vertical distance h between the ultrasonic detection unit and the bottom surface of the electrolytic cell. 0 , and h 1 Perform subtraction to obtain the current electrolyte level h 液 , the calculation formula is: 液 =h 1 -h 0 .

[0042] More specifically, the ultrasonic detection unit is a non-contact ultrasonic sensor.

[0043] In this embodiment, the spacing detection and calculation module is used to obtain the electrode sheet image, and obtain the spacing between the two electrode sheets at the current moment according to the electrode sheet image, which is recorded as d 极片 , and the distance d between the two electrodes at the current moment 极片 Send to the spacing adjustment module to be used as a basis for adjusting the spacing between the two electrode sheets;

[0044] As more specifically, the spacing detection calculation module includes an image acquisition unit, a connection part recognition unit and a spacing calculation unit; the image acquisition unit is used for an industrial camera to shoot two electrode sheets from the front of the electrolytic cell, obtain an image containing two electrode sheets and two connection parts, that is, an electrode sheet image, and send the electrode sheet image to the connection part recognition unit; the connection part recognition unit is used to recognize the two connection parts in the electrode sheet image through the trained first target recognition model, obtain the coordinates of the upper left corner point and the lower right corner point of the two connection part detection frames, and send the coordinates of the upper left corner point and the lower right corner point of the two connection part detection frames to the spacing calculation unit; the spacing calculation unit is used to calculate the spacing between the two connection parts according to the coordinates of the upper left corner point and the lower right corner point of the two connection part detection frames, which is regarded as the spacing d between the two electrode sheets. 极片 .

[0045] To be more specific, the industrial camera is arranged in the middle position directly in front of the electrolytic cell, and its optical axis is arranged horizontally.

[0046] More specifically, the connecting portion is located at the upper end of the electrode sheet, and in an initial state, the axis of the connecting portion coincides with the axis of the electrode sheet.

[0047] To be more specific, the first target recognition model is obtained based on SSD network training.

[0048] As more specific, the processing of the spacing calculation unit (see Figure 2 )as follows:

[0049] S11: The coordinates of the center points of the two connection detection frames are calculated based on the coordinates of the upper left corner point and the lower right corner point of the two connection detection frames. The two center points are respectively denoted as K 1 , K 2 ;

[0050] S12: Calculate the center point K in the image 1 , K 2 The distance between the two connecting parts is the distance between the two electrode sheets. 极片 .

[0051] In this embodiment, the deformation detection module is used to determine whether the lower part of the electrode sheet is bent along the axial direction according to the electrode sheet image, and send the determination result to the alarm module as a basis for whether to issue an alarm.

[0052] It should be noted that during long-term electrolysis, heat will be generated when current passes through the electrode sheet, and the electrode sheet is likely to deform due to overheating. In addition, the gas generated during the electrolysis process will also exert pressure on the electrode sheet, further causing deformation. The deformation here mainly refers to a slight bend along the axial direction of the electrode sheet at the bottom of the electrode sheet. The bent electrode sheet will lead to poor electrolysis efficiency.

[0053] To be more specific, the deformation detection module includes a pole piece side recognition unit and an axial bending judgment unit; the pole piece side recognition unit is used to identify the sides of the two electrode pieces in the electrode piece image through the trained second target recognition model, obtain the coordinates of the upper left corner point and the lower right corner point of the two electrode piece side detection frames, and send the coordinates of the upper left corner point and the lower right corner point of the two electrode piece side detection frames to the axial bending judgment unit; the axial bending judgment unit is used to judge 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 detection frames, and send the judgment result to the alarm module.

[0054] More specifically, the second target recognition model is obtained based on YoLo V3 network training.

[0055] As more specific, the processing process of the axial bending judgment unit (see Figure 3 )as follows:

[0056] S21: using the contour detection function in OpenCV to detect the side contours of the electrode sheets in the two side detection frames of the electrode sheets, and obtaining the coordinates of each point on the side contour line of the electrode sheets;

[0057] S22: In the electrode sheet side detection frame located on the left, first use the upper right corner point of the electrode sheet side detection frame as a reference, traverse the coordinates of each point on the electrode sheet side contour line in the detection frame, calculate the distance between the coordinates of each point on the contour line and the upper right corner point, and obtain the point on the contour line closest to the upper right corner point, which is recorded as the first feature point m 1 , and then take the lower right corner point of the electrode sheet side detection frame as the reference, traverse the coordinates of each point on the electrode sheet side contour line in the detection frame, calculate the distance between the coordinates of each point on the contour line and the lower right corner point, and obtain the point on the contour line closest to the lower right corner point, which is recorded as the second feature point m 2 ;

[0058] S23: In the electrode sheet side detection frame located on the right, first use the upper left corner point of the electrode sheet side detection frame as a reference, traverse the coordinates of each point on the electrode sheet side contour line in the detection frame, calculate the distance between the coordinates of each point on the contour line and the upper left corner point, and obtain the point on the contour line closest to the upper left corner point, which is recorded as the third feature point n 1, and then take the lower left corner point of the electrode sheet side detection frame as the reference, traverse the coordinates of each point on the electrode sheet side contour line in the detection frame, calculate the distance between the coordinates of each point on the contour line and the lower left corner point, and obtain the point on the contour line closest to the lower left corner point, which is recorded as the fourth feature point n 2 ;

[0059] S24: Calculate line segment m 1 n 1 The length in the image is denoted by L 1 , and calculate the line segment m 2 n 2 The length in the image is denoted by L 2 ;

[0060] S25: Calculate L 2 With L 1 The length difference between them is denoted as L 差 , L 差 With the threshold L set 设定 For comparison, when L 差 Greater than or equal to the set threshold L 设定 When the electrode sheet is bent in the axial direction, it is determined that the lower portion of the electrode sheet is bent in the axial direction; otherwise, it is determined that the lower portion of the electrode sheet is not bent in the axial direction.

[0061] It should be noted that, in this embodiment, the threshold value L used to determine whether the electrode sheet is bent along the axial direction is 设定 Set according to actual application requirements.

[0062] In this embodiment, the height adjustment module is used to adjust the electrolyte level h according to the current moment. 液 The heights of the two electrode sheets are adjusted synchronously.

[0063] As more specifically, the height adjustment module includes a first search unit and a height adjustment unit; the first search unit is used to determine the electrolyte level h at the current moment. 液 Search and compare in the liquid level height range-electrode height database to obtain the current electrolyte liquid level h 液 The electrode height u corresponding to the liquid level height range is sent to the height adjustment unit, where the electrode height u is the vertical distance between the bottom surface of the electrode sheet and the bottom surface inside the electrolytic cell; the height adjustment unit is used to synchronously adjust the heights of the two electrode sheets using the two first cylinders according to the obtained electrode height u.

[0064] As more specific, the liquid level height range-electrode height database is preset with the electrolyte liquid level h at the current moment. 液 The corresponding relationship between the liquid level height range and the pole piece height u.

[0065] As more specific, the processing process of the height adjustment unit is as follows:

[0066] S31: Obtain the pole piece height u, and obtain the height position p that the cylinder columns of the two first cylinders need to descend according to the pole piece height u. 1 ;

[0067] S32: Control the cylinders of the two first cylinders to descend synchronously to a height position p 1 , so that the two electrode sheets connected to the cylinder column of the first cylinder through the connecting part are synchronously dropped to the electrode sheet height u, that is, the heights of the two electrode sheets are synchronously adjusted.

[0068] It should be noted that the height position p of the cylinder column of the first cylinder 1 It corresponds one to one with the pole piece height u and is obtained through pre-calibration.

[0069] In this embodiment, the spacing adjustment module is used to adjust the electrolyte level h according to the current moment. 液 The distance d between the two electrodes 极片 Make adjustments;

[0070] As more specifically, the spacing adjustment module includes a second search unit and a spacing adjustment unit; the second search unit is used to determine the electrolyte level h at the current moment. 液 Search and compare in the liquid level range-electrode spacing database to obtain the current electrolyte liquid level h 液 The electrode spacing d corresponding to the liquid level height range is sent to the spacing adjustment unit, where the electrode spacing d is the spacing between two connecting parts connected to the corresponding electrode sheet, which is regarded as the spacing between the electrode sheets; the spacing adjustment unit is used to adjust the spacing d between the two electrode sheets by using the two second cylinders to act synchronously according to the obtained electrode spacing d. 极片 Make adjustments.

[0071] More specifically, the liquid level range-electrode spacing database is preset with the electrolyte liquid level h at the current moment. 液 The corresponding relationship between the liquid level height range and the electrode spacing d.

[0072] More specifically, the processing process of the spacing adjustment unit is as follows:

[0073] S41: Obtain the pole piece spacing d, and obtain the position p to which the cylinder columns of the two second cylinders need to move according to the pole piece spacing d. 2 ;

[0074] S42: Control the cylinders of the two second cylinders to move synchronously to position p 2, so that the distance between the two connecting parts connected to the two electrode sheets is the electrode sheet distance d, that is, the distance d between the two electrode sheets is realized 极片 Make adjustments.

[0075] It should be noted that the cylinder column of the second cylinder advances to position p 2 It corresponds one to one with the pole piece spacing d and is obtained through pre-calibration.

[0076] In this embodiment, the alarm module is used to select whether to issue an alarm according to the determination result of the deformation detection module, so as to remind the operator to replace the electrode sheet in time.

[0077] More specifically, in the alarm module, when the deformation detection module determines that the electrode sheet is bent along the axial direction, an alarm is issued, otherwise no alarm is issued.

[0078] It should be noted that the liquid level detection calculation module, the spacing detection calculation module and the deformation detection module perform a detection at a set time interval, and the upper end of the electrode sheet will not be exposed to the liquid surface between two detections. The time interval is set according to actual needs. 液 When making height and spacing adjustments, do the height adjustment work first, then the spacing adjustment work.

[0079] like Figure 4 As shown, in this embodiment, a water electrolysis hydrogen production device is also provided, which is monitored by the above-mentioned water electrolysis hydrogen production automatic monitoring system, including an electrolytic cell 1 (vertically arranged), an electrode sheet 2, a height adjustment unit, a spacing adjustment unit, a sliding connection frame 4, a non-contact ultrasonic sensor 41, and an external power supply; the electrode sheet 2 is vertically and directly inserted into the electrolyte inside the electrolytic cell 1, the sliding connection frame 4 is horizontally arranged in the middle of the electrolytic cell 1, located above the electrolyte liquid level, and both ends thereof are fixedly connected to the inner wall of the electrolytic cell 1, the non-contact ultrasonic sensor 41 is arranged at the lower end of the sliding connection frame 4, the electrode sheet 2 is detachably connected to the height adjustment unit through a connecting portion 6 (insulating material), the spacing adjustment unit is connected to the height adjustment unit, the height adjustment unit is slidably connected to the sliding connection frame 4, and the external power supply is electrically connected to the two electrode sheets 2 respectively.

[0080] More specifically, the height adjustment unit includes a vertically arranged first cylinder 31, the cylinder body of the first cylinder 31 is slidably connected to the sliding connecting frame 4, and the lower end of the cylinder column 32 (vertically arranged and coaxially connected to the connecting part 6) is connected to the upper end of the electrode sheet 2. The spacing adjustment unit includes a horizontally arranged second cylinder 51, the cylinder body of the second cylinder 51 is fixedly connected to the outside of the electrolytic cell 1, and the cylinder column 52 passes through the electrolytic cell 1 and is connected to the first cylinder 31.

[0081] It should be noted that the industrial camera is fixed in front of the electrolytic cell 1, the front end of the electrolytic cell 1 is made of transparent material, and the electrode sheet 2 is a rectangular thin sheet, and its upper end is immersed in the electrolyte for a distance in the initial state.

[0082] In summary, the automated monitoring system for hydrogen production by water electrolysis of the above-mentioned embodiment obtains the electrolyte liquid level at the current moment, and uses it as a basis to adjust the height and spacing of the electrode sheets at the same time, thereby avoiding as much as possible the phenomenon that the electrode sheets are partially exposed from the liquid surface due to the lowering of the liquid level after the electrolyte is consumed, so that the electrolysis efficiency is effectively guaranteed. After the electrolyte is reduced, the spacing of the electrode sheets can be adjusted in time to reduce the spacing between the two electrode sheets, which can further ensure that the electrolysis efficiency can be maintained at a high level; and it can determine whether the lower part of the electrode sheet has axial bending based on the electrode sheet image. When axial bending occurs in the lower part of the electrode sheet, an alarm is issued to remind the operator to deal with it in time.

[0083] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0085] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An automated monitoring system for hydrogen production by water electrolysis, characterized in that: include: Liquid level detection and calculation module, spacing detection and calculation module, deformation detection module, height adjustment module, spacing adjustment module and alarm module; The liquid level detection and calculation module is used to detect and calculate the electrolyte liquid level at the current moment, which is recorded as h 液 and send it to the height adjustment module and the spacing adjustment module; The spacing detection calculation module is used to obtain the electrode sheet image and obtain the spacing between the two electrode sheets at the current moment according to the electrode sheet image, which is recorded as d 极片 , and send it to the spacing adjustment module; The deformation detection module is used to determine whether the lower part of the electrode sheet is bent along the axial direction according to the electrode sheet image, and send the determination result to the alarm module; The height adjustment module is used to adjust the electrolyte level h according to the current moment. 液 The heights of the two electrode sheets are adjusted synchronously; The spacing adjustment module is used to adjust the electrolyte level h according to the current moment. 液 The distance d between the two electrodes 极片 Make adjustments; The alarm module is used to select whether to issue an alarm according to the judgment result of the deformation detection module, so as to remind the operator to process the electrode sheet in time.

2. The automatic monitoring system for producing hydrogen by water electrolysis according to claim 1, characterized in that: The liquid level detection and calculation module includes an ultrasonic detection unit and a liquid level calculation unit; the ultrasonic detection unit is arranged above the electrolyte level, sends an ultrasonic signal to the electrolyte level in a vertical direction, and receives an echo signal, and then obtains the vertical distance between the ultrasonic detection unit and the electrolyte level at the current moment by calculation, which is recorded as h1; the liquid level calculation unit is used to perform a difference processing between the vertical distance h0 between the ultrasonic detection unit and the bottom surface of the electrolytic cell and h1 to obtain the electrolyte level h at the current moment. 液 , the calculation formula is: 液 =h1-h0.

3. The automatic monitoring system for producing hydrogen by water electrolysis according to claim 1, characterized in that: The spacing detection and calculation module includes an image acquisition unit, a connection part recognition unit and a spacing calculation unit; the image acquisition unit is used for an industrial camera to shoot two electrode sheets from the front of the electrolytic cell to obtain an image containing two electrode sheets and two connection parts, i.e., an electrode sheet image; the connection part recognition unit is used to recognize the two connection parts in the electrode sheet image through a first target recognition model to obtain the coordinates of the upper left corner point and the lower right corner point of the two connection part detection frames; the spacing calculation unit is used to calculate the spacing between the two connection parts according to the coordinates of the upper left corner point and the lower right corner point of the two connection part detection frames, which is regarded as the spacing d between the two electrode sheets. 极片 .

4. The automatic monitoring system for producing hydrogen by water electrolysis according to claim 3, characterized in that: The processing process of the spacing calculation unit is as follows: S11: Calculate the coordinates of the center points of the two connection detection frames according to the coordinates of the upper left corner point and the lower right corner point of the two connection detection frames, and the two center points are respectively recorded as K1 and K2; S12: Calculate the distance between the center points K1 and K2 in the image, that is, the distance between the two connecting parts, as the distance d between the two electrode sheets 极片 .

5. The automatic monitoring system for producing hydrogen by water electrolysis according to claim 4, characterized in that: The deformation detection module includes a pole piece side recognition unit and an axial bending judgment unit; the pole piece side recognition unit is used to identify the sides of the two electrode pieces in the electrode piece image through the second target recognition model, and obtain the coordinates of the upper left corner and lower right corner points of the two electrode piece side detection frames; the axial bending judgment unit is used to judge whether the lower part of the electrode piece is bent along the axial direction according to the coordinates of the upper left corner and lower right corner points of the two electrode piece side detection frames, and send the judgment result to the alarm module.

6. The automatic monitoring system for producing hydrogen by water electrolysis according to claim 5, characterized in that: The processing process of the axial bending judgment unit is as follows: S21: determining the position of the electrode sheet side detection frame according to the coordinates of the upper left corner point and the lower right corner point of the two electrode sheet side detection frames, and detecting the electrode sheet side contours in the two electrode sheet side detection frames using the contour detection function in OpenCV to obtain the coordinates of each point on the electrode sheet side contour line; S22: In the electrode sheet side detection frame located on the left side, firstly, taking the upper right corner point of the electrode sheet side detection frame as a reference, traverse the coordinates of each point on the electrode sheet side contour line in the detection frame, calculate the distance between the coordinates of each point on the contour line and the upper right corner point, obtain the point on the contour line closest to the upper right corner point, record it as the first feature point m1, then take the lower right corner point of the electrode sheet side detection frame as a reference, traverse the coordinates of each point on the electrode sheet side contour line in the detection frame, calculate the distance between the coordinates of each point on the contour line and the lower right corner point, obtain the point on the contour line closest to the lower right corner point, record it as the second feature point m2; S23: In the electrode sheet side detection frame located on the right side, firstly, taking the upper left corner point of the electrode sheet side detection frame as a reference, traversing the coordinates of each point on the electrode sheet side contour line in the detection frame, calculating the distance between the coordinates of each point on the contour line and the upper left corner point, obtaining the point on the contour line closest to the upper left corner point, recorded as the third feature point n1, and then taking the lower left corner point of the electrode sheet side detection frame as a reference, traversing the coordinates of each point on the electrode sheet side contour line in the detection frame, calculating the distance between the coordinates of each point on the contour line and the lower left corner point, obtaining the point on the contour line closest to the lower left corner point, recorded as the fourth feature point n2; S24: Calculate the length of the line segment m1n1 in the image, denoted as L1, and calculate the length of the line segment m2n2 in the image, denoted as L2; S25: Calculate the length difference between L2 and L1, recorded as L 差 , L 差 With the threshold L set 设定 For comparison, when L 差 Greater than or equal to the set threshold L 设定 When the electrode sheet is bent in the axial direction, it is determined that the lower portion of the electrode sheet is bent in the axial direction; otherwise, it is determined that the lower portion of the electrode sheet is not bent in the axial direction.

7. The automatic monitoring system for producing hydrogen by water electrolysis according to claim 6, characterized in that: The height adjustment module includes a first search unit and a height adjustment unit; the first search unit is used to determine the electrolyte level h at the current moment. 液 Search and compare in the liquid level height range-electrode height database to obtain the current electrolyte liquid level h 液 The electrode height u corresponding to the liquid level height range is the vertical distance between the bottom surface of the electrode and the bottom surface of the electrolytic cell. The electrolyte liquid level h at the current moment is preset in the liquid level height range-electrode height database. 液 The corresponding relationship between the liquid level height range and the electrode height u; the height adjustment unit is used to synchronously adjust the heights of the two electrode sheets using the two first cylinders according to the acquired electrode height u.

8. The automatic monitoring system for producing hydrogen by water electrolysis according to claim 7, characterized in that: The processing process of the height adjustment unit is as follows: S31: obtaining a pole piece height u, and obtaining a height position p1 of the cylinder columns of two vertically arranged first cylinders that need to be lowered according to the pole piece height u, wherein the height position p1 of the cylinder columns of the first cylinders corresponds to the pole piece height u in a one-to-one manner; S32: Control the cylinder columns of the two first cylinders to synchronously descend to the height position p1, so that the two electrode sheets connected to the cylinder columns of the first cylinders through the connecting parts synchronously descend to the electrode sheet height u, that is, to achieve synchronous adjustment of the heights of the two electrode sheets.

9. The automatic monitoring system for producing hydrogen by water electrolysis according to claim 8, characterized in that: The spacing adjustment module includes a second search unit and a spacing adjustment unit; the second search unit is used to determine the electrolyte level h at the current moment. 液 Search and compare in the liquid level range-electrode spacing database to obtain the current electrolyte liquid level h 液 The electrode spacing d corresponding to the liquid level height range, the electrode spacing d is the distance between the two connecting parts connected to the corresponding electrode sheet, which is regarded as the distance between the electrode sheets. The liquid level height range-electrode spacing database is preset with the electrolyte liquid level h at the current moment 液 The corresponding relationship between the liquid level height range and the electrode spacing d; the spacing adjustment unit is used to adjust the spacing d between the two electrode sheets by using the two second cylinders to act synchronously according to the obtained electrode spacing d 极片 Make adjustments.

10. The automatic monitoring system for producing hydrogen by water electrolysis according to claim 9, characterized in that: The processing process of the spacing adjustment unit is as follows: S41: obtaining the pole piece spacing d, and obtaining the position p2 to which the cylinder columns of the two second cylinders need to advance according to the pole piece spacing d, wherein the position p2 to which the cylinder columns of the second cylinders advance corresponds to the pole piece spacing d in a one-to-one manner; S42: Control the cylinders of the two horizontally arranged second cylinders to synchronously advance to position p2, so that the distance between the two connecting parts respectively connected to the two electrode sheets is the electrode sheet distance d, that is, the distance d between the two electrode sheets is achieved. 极片 Make adjustments.

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