Forming tank liquid replenishment control method, system and device and forming tank

Abstract

The present invention is to solve the problems of high cost, easy aging, surface scaling and influence on daily maintenance of a formation tank in the prior art of the electrode feedback method for replenishing liquid, and discloses a formation tank tank liquid replenishment control method, system and device and a formation tank. In the method, the magnitude of the induced current when the tank liquid passes through the magnetic core coil is measured to determine whether to replenish the tank liquid. The system includes a first acquisition unit, a second acquisition unit, a first comparison unit, a third acquisition unit, a second comparison unit, a replenishment unit, an acquisition unit, a fourth acquisition unit and an evaluation unit. The device includes a magnetic core coil, a signal converter, a controller and a solenoid valve. The formation tank includes a tank body, a circulation pump, an external circulation pipe, a replenishment pipe and a formation tank tank liquid replenishment control device. The present invention provides a formation tank tank liquid replenishment control method, system and device and a formation tank, which are non-contact, corrosion-free and have low maintenance costs.

Description

Technical Field

[0001] The invention relates to the technical field of capacitor aluminum foil production, and in particular to a formation tank liquid replenishment control method, system and device, and a formation tank. Background Art

[0002] Anode foil for aluminum electrolytic capacitors is widely used in electronic product components and is a basic material for the development of the country's industry. When the anode foil production line is in production, the corroded foil needs to be continuously passed through the forming liquid in multiple forming tanks to form an oxide film step by step under the action of voltage. During the production process of the anode foil, the temperature of the forming tank liquid is generally controlled at around 85°C. The evaporation of the forming tank liquid is very large, and it needs to be replenished in time to keep the tank liquid concentration relatively stable.

[0003] At present, small enterprises use timed liquid collection and manual testing to determine whether to add tank liquid. Large enterprises in the same industry also have automatic liquid replenishment systems, but most of them use electrode feedback method to replenish liquid and control tank liquid parameters. The use of automatic liquid replenishment control system is the trend of future manufacturing development, but the electrode feedback method has the following defects:

[0004] 1. The cost of high temperature resistant electrodes is relatively high (the price is about 1,000 yuan per piece);

[0005] 2. The electrodes are prone to aging in high temperature and corrosive baths and need to be replaced regularly (usually every 6-12 months);

[0006] 3. The electrode is in contact with the tank liquid, and scale will form on the surface after a period of time, affecting the data sensitivity and indirectly affecting the actual setting parameters of the tank liquid;

[0007] 4. The electrode needs to be installed inside the reaction tank of the production line, and the tank liquid is dynamically circulated. On the one hand, it is difficult to replace, and on the other hand, it will affect the daily maintenance of the formation tank. Summary of the invention

[0008] The present invention aims to solve the problems of high cost, easy aging, surface scaling and influence on daily maintenance of formation tank in the prior art of liquid replenishment by electrode feedback method, and provides a formation tank liquid replenishment control method, system and device as well as a formation tank, which are non-contact, corrosion-free and have low maintenance cost.

[0009] The technical solution adopted by the present invention is:

[0010] A method for controlling the replenishment of a formation tank liquid, the method comprising the following steps:

[0011] Step S1, the control system collects or records the initial induced current when the tank liquid in continuous flow passes through the magnetic core coil to obtain a control interval; the control interval is the initial induced current ± a preset amplitude value;

[0012] Step S2, the control system continuously or intermittently collects a first working induced current when the tank liquid in a non-liquid replenishment state continuously flows through the magnetic core coil;

[0013] Step S3, the control system compares the first working induced current with the control interval; if the control system determines that the first working induced current is less than or equal to the lower limit of the control interval, a tank liquid replenishment instruction is issued;

[0014] Step S4, the control system replenishes the tank liquid according to the tank liquid replenishment instruction;

[0015] Step S5, the control system continuously or intermittently collects a second working induced current when the tank liquid in a continuously flowing state passes through the magnetic core coil in a liquid replenishing state;

[0016] Step S6, the control system compares the second working induced current with the control interval; if the control system determines that the lower limit of the control interval is less than the second working induced current and less than the upper limit of the control interval, a tank liquid replenishment stop instruction is issued;

[0017] Step S7, the control system stops tank liquid replenishment according to the tank liquid replenishment stop instruction;

[0018] Step S8, repeat steps S2 to S7.

[0019] Furthermore, the method further comprises:

[0020] Step S9, the control system obtains the tank solution concentrations corresponding to the initial induced current, the first working induced current and the second working induced current, and thereby establishes an induced current-concentration model;

[0021] Step S10, the control system collects a third working induction current when the tank liquid continuously flows through the magnetic core coil at time T;

[0022] Step S11, the control system estimates the concentration of the bath solution at time T based on the third working induced current according to the induced current-concentration model.

[0023] A formation tank liquid replenishment control system, the system comprising:

[0024] A first acquisition unit, wherein the first acquisition unit acquires an initial induced current when the tank liquid in continuous flow passes through the magnetic core coil to obtain a control interval; the control interval is the initial induced current ± a preset amplitude value;

[0025] A second collection unit, which continuously or intermittently collects a first working induction current when the tank liquid in a non-liquid replenishing state continuously flows through the magnetic core coil;

[0026] a first comparison unit, the first comparison unit comparing the first working induced current with the control interval; if the control system determines that the first working induced current is ≤ a lower limit of the control interval, issuing a tank liquid replenishment instruction;

[0027] a third collection unit, which continuously or intermittently collects a second working induction current when the tank liquid in a continuously flowing state passes through the magnetic core coil;

[0028] a second comparison unit, wherein the second comparison unit compares the second working induced current with the control interval; if the control system determines that the lower limit of the control interval is less than the second working induced current and less than the upper limit of the control interval, a tank liquid replenishment stop instruction is issued;

[0029] a liquid replenishing unit, wherein the liquid replenishing unit replenishes the tank liquid according to the tank liquid replenishing instruction, or the liquid replenishing unit stops replenishing the tank liquid according to the tank liquid replenishing stop instruction;

[0030] If the initial induced current is obtained by recording, the first acquisition unit is replaced by a recording unit.

[0031] Furthermore, the system further comprises:

[0032] An acquisition unit, wherein the acquisition unit acquires the bath solution concentrations corresponding to the initial induced current, the first working induced current, and the second working induced current, and thereby establishes an induced current-concentration model;

[0033] A fourth collecting unit, wherein the fourth collecting unit collects a third working induction current when the tank liquid in continuous flow passes through the magnetic core coil at time T;

[0034] An evaluation unit, wherein the evaluation unit estimates the concentration of the bath solution at time T based on the third working induced current according to an induced current-concentration model.

[0035] Furthermore, the first comparison unit and the second comparison unit have the same structure.

[0036] Furthermore, the first acquisition unit, the second acquisition unit, the third acquisition unit and the fourth acquisition unit have the same structure.

[0037] The formation tank liquid replenishment control device acts on the external circulation mechanism of the formation tank, and the device comprises:

[0038] A magnetic core coil, wherein the magnetic core coil is sleeved on the outer wall of the outer circulation tube of the outer circulation mechanism; when the tank liquid continues to flow in the circulation tube, the magnetic core coil generates an induced current;

[0039] A signal converter, the signal converter is connected to the magnetic core coil and detects and amplifies the induced current generated by the magnetic core coil;

[0040] A controller, which is connected to the signal converter, receives and compares the induced current signal processed by the signal converter, constructs an induced current-concentration model, performs concentration evaluation, issues instructions, and inputs information;

[0041] The electromagnetic valve is located on the liquid replenishing pipe of the formation tank and is connected to the controller, and performs liquid replenishment or stops liquid replenishment according to the instruction of the controller.

[0042] Furthermore, the magnetic core coil is provided in two pieces, which are respectively sleeved on the outer walls of two parallel outer circulation pipes or the outer walls of the parallel parts of the outer circulation pipes; after the two magnetic core coils are connected in parallel, a closed magnetic circuit can be formed in the outer circulation pipe.

[0043] Furthermore, the controller is provided with a display module, and the display module is used to display the magnitude of the induced current generated by the magnetic core coil and the concentration of the tank liquid, as well as the replenishment status of the tank liquid.

[0044] A formation tank, comprising:

[0045] A tank body, wherein an external circulation inlet and an external circulation outlet are respectively arranged at the upper and lower positions of the outer side wall of the tank body;

[0046] A circulation pump, wherein the inlet end of the circulation pump is connected to the external circulation outlet;

[0047] An external circulation pipe, one end of which is connected to the outlet of the circulation pump, and the other end of which is connected to the external circulation inlet;

[0048] A liquid replenishing tube, the liquid replenishing tube is connected to a storage container of the tank liquid;

[0049] The aforementioned formation tank liquid replenishment control device.

[0050] The beneficial effects of the present invention are:

[0051] The present invention solves the problems of high cost, easy aging, surface scaling and influence on daily maintenance of formation tank in the prior art of electrode feedback method for replenishing liquid, and provides a formation tank tank liquid replenishment control method, system and device and formation tank. The formation tank tank liquid replenishment control method, system and device and the formation tank use the induced current generated by the magnetic core coil through the different concentrations of the tank liquid to judge whether the tank liquid is replenished or not. Compared with the existing electrode feedback method, it has the following advantages:

[0052] 1. Non-contact measurement method, can be installed on the external circulation mechanism of the tank liquid to avoid contact with the tank liquid, eliminating daily maintenance problems such as aging, scaling, and decreased sensitivity.

[0053] 2. The magnetic core coil has stable performance, wide measurement range (much higher than the electrode measurement range), and high detection accuracy (±1%).

[0054] 3. The installation is simple and convenient, and it is easier to upgrade the old production line.

[0055] 4. Basically maintenance-free, service life is greatly improved.

[0056] 5. Compared with the existing fluid parameter sensing equipment (conductivity probe), which is generally two coils superimposed and packaged together, the packaged coil is immersed in the liquid to be tested, and the magnetic field of the coil is used to sense the change in the concentration of the tank liquid to obtain data. Since the coil is immersed in the tank liquid, the tank liquid is constantly stirring, and there will be different sensing areas inside and outside the coil. In particular, there is a factor of the distance between the coil and the tank wall, and the sensing data obtained is relatively unstable. The control device in the present invention completely eliminates the influence of the tank liquid outside the magnetic core coil by setting a parallel (non-coaxial) magnetic core coil (only sensing the liquid inside the magnetic core coil), and the data obtained is single, accurate and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0058] Figure 1 This is a schematic diagram of the logical connections of the control system in Example 2.

[0059] Figure 2 This is a logical connection diagram of the control device in Example 3.

[0060] Figure 3 This is a schematic diagram of a closed magnetic circuit formed by a magnetic core coil in Example 3.

[0061] Figure 4 It is a schematic diagram of the coil magnetic circuit of the sensor in the prior art.

[0062] Figure 5 This is a schematic diagram of the structure of the formation tank in Example 4. DETAILED DESCRIPTION

[0063] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0064] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0065] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention.

[0066] The embodiments of the invention are described in detail below with reference to the accompanying drawings.

[0067] Example 1

[0068] The present invention aims to solve the problems of high cost, easy aging, surface scaling and influence on daily maintenance of formation tank in the prior art of liquid replenishment by electrode feedback method, and provides a formation tank liquid replenishment control method, system and device as well as a formation tank, which are non-contact measurement, corrosion-free and low maintenance cost.

[0069] This embodiment discloses a method for controlling the replenishment of a formation tank liquid, the method comprising the following steps:

[0070] Step S1, the control system collects or records the initial induced current when the tank liquid in continuous flow passes through the magnetic core coil to obtain a control range; the control range is the initial induced current ± a preset amplitude value.

[0071] "Initial" refers to the state before the formation tank is activated or when the bath solution concentration of the formation tank is within a predetermined concentration range. The initial induced current can be obtained by direct detection or manual entry. The preset amplitude value is also set by manual entry.

[0072] For example, the initial induced current is 0.50 mA, and the preset amplitude value is 0.01 mA, then the control interval is 0.50 mA ± 0.01 mA, that is, the lower limit of the control interval is 0.49 mA, and the upper limit of the control interval is 0.51 mA.

[0073] Step S2, the control system continuously or intermittently collects the first working induced current when the tank liquid in continuous flow passes through the magnetic core coil in the non-replenishment state. The tank liquid flows in a separate pipe. The magnetic core coil is sleeved outside the pipe and is not in direct contact with the tank liquid. When the tank liquid passes through the area where the magnetic core coil is located, the magnetic core coil will generate an induced current. The non-replenishment state refers to the state when the formation tank is in the anode foil processing, the tank liquid can meet the formation needs, and there is no need to replenish the tank liquid.

[0074] In step S3, the control system compares the first working induced current with the control interval; if the control system determines that the first working induced current is ≤ the lower limit of the control interval, a tank liquid replenishment instruction is issued.

[0075] For example, the initial induction current is 0.50mA, the preset amplitude value is 0.01mA, and the control range is 0.50mA±0.01mA. The first working induction current is 0.48mA, 0.48<0.49 (the lower limit of the control range), and the control system issues a tank liquid replenishment instruction.

[0076] Step S4, the control system replenishes the tank liquid according to the tank liquid replenishment instruction.

[0077] Step S5, the control system continuously or intermittently collects the second working induced current when the tank liquid in the continuous flow state passes through the magnetic core coil in the liquid replenishing state.

[0078] Step S6, the control system compares the second working induced current with the control interval; if the control system determines that the lower limit of the control interval is less than the second working induced current and less than the upper limit of the control interval, a tank liquid replenishment stop instruction is issued.

[0079] For example, the initial induction current is 0.50mA, the preset amplitude value is 0.01mA, then the control range is 0.50mA±0.01mA. The second working induction current is 0.51mA, 0.51=0.51 (the upper limit of the control range), and the control system issues a command to stop tank liquid replenishment.

[0080] Step S7, the control system stops tank liquid replenishment according to the tank liquid replenishment stop instruction.

[0081] Step S8, repeat steps S2 to S7.

[0082] Step S9, the control system obtains the bath solution concentration corresponding to the initial induced current, the first working induced current and the second working induced current, and thereby establishes an induced current-concentration model. The induced current-concentration model is established by machine learning: a large number of databases of initial induced currents, first working induced currents and second working induced currents and the concentrations of the corresponding bath solutions are established, and the data in the database are divided into a training set and a test set in a ratio of 8:2. The induced current-concentration model is trained by the training set, and the induced current-concentration model is verified by the test set.

[0083] Step S10, the control system collects the third working induction current when the tank liquid continuously flows through the magnetic core coil at time T.

[0084] Step S11, the control system estimates the concentration of the bath solution at time T from the third working induced current according to the induced current-concentration model. The bath solution concentration at time T can be estimated without sampling and analyzing the bath solution at a later stage.

[0085] The control method in this embodiment has the following advantages:

[0086] 1. Through repeated dynamic detection of the induced current and accurate control of the bath liquid concentration, the product quality can be improved by 1 to 2 grades.

[0087] 2. Reduce errors and other unstable factors during human detection operations.

[0088] 3. Automated and precise addition of tank liquid can reduce the waste of raw materials and labor expenses, which is beneficial to reducing product costs.

[0089] Example 2

[0090] In this embodiment, a formation tank liquid replenishment control system is provided, which includes a first collection unit 1, a second collection unit 2, a first comparison unit 3, a third collection unit 4, a second comparison unit 5, a liquid replenishment unit 6, an acquisition unit 7, a fourth collection unit 8 and an evaluation unit 9. The logical connection structure is shown in the attached figure. Figure 1 shown.

[0091] The first acquisition unit 1 acquires the initial induced current when the tank liquid in continuous flow passes through the magnetic core coil to obtain a control interval; the control interval is the initial induced current ± a preset amplitude value. If the initial induced current is set by manual entry, the first acquisition unit 1 is replaced by an entry unit.

[0092] The second collection unit 2 continuously or intermittently collects the first working induction current when the tank liquid in a non-liquid replenishing state continuously flows through the magnetic core coil.

[0093] The first comparison unit 3 compares the first working induced current with the control interval; if the control system determines that the first working induced current is ≤ the lower limit of the control interval, a tank liquid replenishment instruction is issued.

[0094] The third collecting unit 4 continuously or intermittently collects the second working induction current when the tank liquid in a continuously flowing state passes through the magnetic core coil in a liquid replenishing state.

[0095] The second comparison unit 5 compares the second working induced current with the control interval; if the control system determines that the lower limit of the control interval is less than the second working induced current and less than the upper limit of the control interval, a tank liquid replenishment stop instruction is issued.

[0096] The liquid replenishing unit 6 replenishes the tank liquid according to the tank liquid replenishing instruction, or the liquid replenishing unit stops replenishing the tank liquid according to the tank liquid replenishing stop instruction.

[0097] The acquisition unit 7 acquires the concentration of the bath solution when collecting the initial induced current, the first working induced current and the second working induced current, and thereby establishes an induced current-concentration model.

[0098] The fourth collecting unit 8 collects the third working induction current when the tank liquid in continuous flow passes through the magnetic core coil at time T.

[0099] The evaluation unit 9 estimates the concentration of the bath solution at time T according to the third working induced current based on the induced current-concentration model.

[0100] The first comparison unit 3 and the second comparison unit 5 have the same structure, that is, in practice, one of them can be selected to perform the corresponding operation.

[0101] The first acquisition unit 2, the second acquisition unit 3, the third acquisition unit 4 and the fourth acquisition unit 8 have the same structure. That is, in practice, one of them can be selected to perform the corresponding operation.

[0102] By using the system in this example, the concentration of the tank liquid can be accurately controlled, the errors and other unstable factors in the human detection operation process can be reduced, the waste of raw materials and labor expenses can be reduced, and the product cost can be reduced.

[0103] Example 3

[0104] This embodiment provides a formation tank liquid replenishment control device, which acts on the external circulation mechanism of the formation tank. The device includes a magnetic core coil 10, a signal converter 20, a controller 30 and a solenoid valve 40. The logical connection structure is shown in the attached figure. Figure 2 shown.

[0105] The number of magnetic core coils 10 is two, and they are respectively sleeved on the outer walls of two parallel external circulation pipes or the outer walls of the parallel parts of the external circulation pipes, as shown in the attached Figure 3As shown. A stable electromagnetic waveform is given to one of the magnetic core coils 10, and the waveform will be transmitted to the other magnetic core coil 10 through the fluid. The magnetic core coil 10 will obtain a fixed waveform related to the previous magnetic core coil 10. The two magnetic core coils 10 are connected in parallel to form a closed magnetic circuit. When the waveform of the previous magnetic core coil 10 is fixed, the change in fluid concentration will affect the waveform change of the other magnetic core coil 10, and the induced current will change accordingly.

[0106] The existing fluid parameter sensing equipment (conductivity probe) is generally two coils stacked in series and packaged together. The packaged coil is immersed in the liquid to be tested, and the magnetic field of the coil is used to sense the change of the bath liquid concentration to obtain data, as shown in the attached figure. Figure 4 As shown in . Since the magnetic circuit of the coil is an open one, when it is immersed in the tank liquid, the tank liquid is constantly stirred, and there will be different sensing areas inside and outside the coil. In particular, there is a factor of the distance between the coil periphery and the tank wall, and the sensing data obtained is relatively unstable. The control device in this embodiment is provided with two parallel (non-coaxial) magnetic core coils 10, and the magnetic closed loop formed is only in the external circulation tube, completely eliminating the influence of the tank liquid outside the magnetic core coil (only sensing the liquid inside the magnetic core coil), and the data obtained is single, accurate and stable.

[0107] The signal converter 20 is connected to the magnetic core coil 10 , and detects and amplifies the induced current generated by the magnetic core coil 10 .

[0108] The controller 30 is connected to the signal converter 20, receives and compares the induced current signal processed by the signal converter 20, constructs an induced current-concentration model and performs concentration evaluation, issues a fluid replenishment or fluid replenishment stop instruction, and manually inputs information that needs to be manually input, such as the initial induced current and the preset amplitude value. The controller 30 is also provided with a display module, which is used to display the induced current generated by the magnetic core coil and the concentration of the tank liquid, as well as the replenishment of the tank liquid.

[0109] For example, the initial induced current is 0.50mA, the preset amplitude value is 0.01mA, and the control interval is 0.50mA±0.01mA. The first working induced current is 0.48mA, 0.48<0.49 (the lower limit of the control interval), and the controller 30 issues a tank liquid replenishment instruction. The second working induced current is 0.51mA, 0.51=0.51 (the upper limit of the control interval), and the controller 30 issues a tank liquid replenishment stop instruction.

[0110] The solenoid valve 40 is located on the liquid replenishing pipe of the formation tank and is connected to the controller 30 , and performs or stops liquid replenishing according to the instruction of the controller 30 .

[0111] The device in this embodiment acts on the external circulation mechanism of the formation tank and does not directly contact the tank liquid, thus avoiding corrosion hazards and eliminating daily maintenance problems such as aging, scaling, and decreased sensitivity. It is simple and convenient to install, making it easier to upgrade old production lines and greatly improving their service life.

[0112] Example 4

[0113] The present embodiment provides a formation tank, which includes a tank body 100, a circulation pump 200, an external circulation pipe 300, a liquid replenishing pipe 400 and a formation tank liquid replenishing control device, as shown in the attached Figure 5 shown.

[0114] The tank body 100 has an external circulation inlet 110 and an external circulation outlet 120 respectively disposed at the upper and lower positions of the outer side wall thereof.

[0115] The circulation pump 200 has its inlet end connected to the external circulation outlet 120 .

[0116] One end of the external circulation pipe 300 is connected to the outlet end of the circulation pump 200 , and the other end is connected to the external circulation inlet 110 .

[0117] The liquid replenishing tube 400 is connected to the storage container of the tank liquid.

[0118] The device for controlling the replenishment of the liquid in a formation tank comprises a magnetic core coil 10 , a signal converter 20 , a controller 30 and a solenoid valve 40 .

[0119] The magnetic core coil 10 is sleeved on the outer wall of the outer circulation tube 300 of the outer circulation mechanism; when the tank liquid continues to flow in the outer circulation tube 300, the magnetic core coil 10 generates an induced current. There are two magnetic core coils 10, which are respectively sleeved on the outer walls of the two parallel outer circulation tubes 300 or the outer walls of the parallel parts of the outer circulation tubes. A stable electromagnetic waveform is given to one of the magnetic core coils 10, and the waveform will be transmitted to the other magnetic core coil 10 through the fluid. The magnetic core coil 10 will obtain a fixed waveform related to the previous magnetic core coil 10, and the two magnetic core coils 10 will form a closed magnetic circuit after being connected in parallel. When the waveform of the previous magnetic core coil 10 is fixed, the change in fluid concentration will affect the waveform change of the other magnetic core coil 10, and the induced current will change accordingly.

[0120] The signal converter 20 is connected to the magnetic core coil 10 , and detects and amplifies the induced current generated by the magnetic core coil 10 .

[0121] The controller 30 is connected to the signal converter 20, receives and compares the induced current signal processed by the signal converter 20, constructs an induced current-concentration model and performs concentration evaluation, issues a fluid replenishment or fluid replenishment stop instruction, and manually inputs information that needs to be manually input, such as the initial induced current and the preset amplitude value. The controller 30 is also provided with a display module, which is used to display the induced current generated by the magnetic core coil and the concentration of the tank liquid, as well as the replenishment of the tank liquid.

[0122] The solenoid valve 40 is located on the liquid replenishing pipe of the formation tank and is connected to the controller 30 , and performs or stops liquid replenishing according to the instruction of the controller 30 .

[0123] In the formation tank of this embodiment, the concentration of the tank solution is precisely controlled, which is beneficial to ensuring product quality.

Claims

1. A method for controlling the replenishment of a formation tank liquid, characterized in that: The method comprises the following steps: Step S1, the control system collects or records the initial induced current of the tank liquid continuously flowing in the outer circulation tube of the formation tank through the magnetic core coil sleeved on the outer wall of the outer circulation tube by non-contact measurement, and obtains a control interval; the control interval is the initial induced current ± a preset amplitude value; Step S2, the control system continuously or intermittently collects, by non-contact measurement, a first working induced current when the tank liquid continuously flowing in the outer circulation pipe of the formation tank in a non-liquid replenishing state passes through a magnetic core coil sleeved on the outer wall of the outer circulation pipe; Step S3, the control system compares the first working induced current with the control interval; if the control system determines that the first working induced current is less than or equal to the lower limit of the control interval, a tank liquid replenishment instruction is issued; Step S4, the control system replenishes the tank liquid according to the tank liquid replenishment instruction; Step S5, the control system continuously or intermittently collects, by non-contact measurement, a second working induced current when the tank liquid continuously flowing in the outer circulation pipe of the formation tank in the replenishing state passes through the magnetic core coil sleeved on the outer wall of the outer circulation pipe; Step S6, the control system compares the second working induced current with the control interval; if the control system determines that the lower limit of the control interval is less than the second working induced current and less than the upper limit of the control interval, a tank liquid replenishment stop instruction is issued; Step S7, the control system stops tank liquid replenishment according to the tank liquid replenishment stop instruction; Step S8, repeat steps S2 to S7.

2. The formation tank liquid replenishment control method according to claim 1, characterized in that: The method further comprises: Step S9, the control system obtains the tank solution concentrations corresponding to the initial induced current, the first working induced current and the second working induced current, and thereby establishes an induced current-concentration model; Step S10, the control system collects a third working induction current when the tank liquid continuously flows through the magnetic core coil at time T; Step S11, the control system estimates the concentration of the bath solution at time T based on the third working induced current according to the induced current-concentration model.

3. A formation tank liquid replenishment control system implementing the formation tank liquid replenishment control method as claimed in claim 1, characterized in that: The system comprises: A first acquisition unit, wherein the first acquisition unit acquires an initial induced current when the tank liquid in continuous flow passes through the magnetic core coil to obtain a control interval; the control interval is the initial induced current ± a preset amplitude value; A second collection unit, which continuously or intermittently collects a first working induction current when the tank liquid in a non-liquid replenishing state continuously flows through the magnetic core coil; a first comparison unit, the first comparison unit comparing the first working induced current with the control interval; if the control system determines that the first working induced current is ≤ a lower limit of the control interval, issuing a tank liquid replenishment instruction; a third collection unit, which continuously or intermittently collects a second working induction current when the tank liquid in a continuously flowing state passes through the magnetic core coil; a second comparison unit, wherein the second comparison unit compares the second working induced current with the control interval; if the control system determines that the lower limit of the control interval is less than the second working induced current and less than the upper limit of the control interval, a tank liquid replenishment stop instruction is issued; a liquid replenishing unit, wherein the liquid replenishing unit replenishes the tank liquid according to the tank liquid replenishing instruction, or the liquid replenishing unit stops replenishing the tank liquid according to the tank liquid replenishing stop instruction; If the initial induced current is obtained by recording, the first acquisition unit is replaced by a recording unit.

4. The formation tank liquid replenishment control system according to claim 3, characterized in that: The system further comprises: An acquisition unit, wherein the acquisition unit acquires the bath solution concentrations corresponding to the initial induced current, the first working induced current, and the second working induced current, and thereby establishes an induced current-concentration model; A fourth collecting unit, wherein the fourth collecting unit collects a third working induction current when the tank liquid in continuous flow passes through the magnetic core coil at time T; An evaluation unit, wherein the evaluation unit estimates the concentration of the bath solution at time T based on the third working induced current according to an induced current-concentration model.

5. The formation tank liquid replenishment control system according to claim 3 or 4, characterized in that: The first comparison unit and the second comparison unit have the same structure.

6. The formation tank liquid replenishment control system according to claim 4, characterized in that: The first acquisition unit, the second acquisition unit, the third acquisition unit and the fourth acquisition unit have the same structure.

7. A formation tank liquid replenishment control device, acting on the external circulation mechanism of the formation tank to implement the formation tank liquid replenishment control method as claimed in claim 2, characterized in that: The device comprises: A magnetic core coil, wherein the magnetic core coil is sleeved on the outer wall of the outer circulation tube of the outer circulation mechanism; when the tank liquid continues to flow in the circulation tube, the magnetic core coil generates an induced current; A signal converter, the signal converter is connected to the magnetic core coil and detects and amplifies the induced current generated by the magnetic core coil; A controller, which is connected to the signal converter, receives and compares the induced current signal processed by the signal converter, constructs an induced current-concentration model, performs concentration evaluation, issues instructions, and inputs information; The electromagnetic valve is located on the liquid replenishing pipe of the formation tank and is connected to the controller, and performs liquid replenishment or stops liquid replenishment according to the instruction of the controller.

8. The formation tank liquid replenishment control device according to claim 7, characterized in that: The two magnetic core coils are provided, and are respectively sleeved on the outer walls of two parallel outer circulation pipes or the outer walls of the parallel parts of the outer circulation pipes; after the two magnetic core coils are connected in parallel, a closed magnetic circuit can be formed in the outer circulation pipe.

9. The formation tank liquid replenishment control device according to claim 7 or 8, characterized in that: The controller is provided with a display module, and the display module is used to display the magnitude of the induced current generated by the magnetic core coil and the concentration of the tank liquid, as well as the replenishment status of the tank liquid.

10. A forming tank, characterized in that: The formation tank comprises: A tank body, wherein an external circulation inlet and an external circulation outlet are respectively arranged at the upper and lower positions of the outer side wall of the tank body; A circulation pump, wherein the inlet end of the circulation pump is connected to the external circulation outlet; An external circulation pipe, one end of which is connected to the outlet of the circulation pump, and the other end of which is connected to the external circulation inlet; A liquid replenishing tube, the liquid replenishing tube is connected to a storage container of the tank liquid; A formation tank liquid replenishment control device as claimed in claim 7, 8 or 9.

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