Monitoring method, device, system, equipment and storage medium of mixing system

Abstract

The present application discloses a monitoring method, device, system, equipment and storage medium for a stirring system. The method comprises: obtaining a rotation speed according to a rotation signal of a stirring paddle detected by an eddy current sensor disposed outside the stirring barrel; obtaining a corresponding amplitude standard value according to the rotation speed and the first distance; converting the rotation signal from the time domain to the frequency domain to obtain a corresponding frequency domain signal; judging whether the conditions for warning the risk of the stirring paddle touching the wall are met according to the corresponding amplitude standard value and the frequency domain signal; and executing a corresponding warning strategy when the conditions are met. The method of the embodiment of the present application can give a timely warning when the distance between the stirring paddle and the barrel wall of the stirring barrel is too close and there is a high risk of contact, so as to remind relevant personnel to take timely measures to prevent the stirring paddle from touching the barrel wall of the stirring barrel, greatly reducing the risk of contact, and reducing the probability of the stirring paddle touching the barrel wall and scraping off metal particles, which helps to improve the performance of the manufactured battery.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a monitoring method, device, system, equipment and storage medium for a stirring system. Background Art

[0002] The slurry manufacturing of power lithium batteries, energy storage batteries and other batteries is the process of evenly dispersing the positive and negative active material powders, conductive agent powders, polymer binders and additives in the solution of the mixing barrel and stirring to form a stable suspension. During the stirring and slurrying process, the stirring paddle is likely to touch the wall of the mixing barrel and scrape metal particles from the barrel wall. These metal particles will merge into the slurry, resulting in the risk of metal particles flowing out. The slurry doped with metal particles is used to manufacture battery cells, which will affect the performance of the manufactured battery cells. Therefore, it is urgent to develop a technical solution to monitor the distance between the stirring paddle and the wall of the mixing barrel.

[0003] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art. Summary of the invention

[0004] In view of the problem that during the stirring and slurrying process in the above-mentioned related technologies, the stirring paddle is prone to touch the wall of the stirring barrel and scrape metal particles from the barrel wall, and the fusion of metal particles into the slurry will affect the performance of the manufactured battery cells, the present application provides a monitoring method, device, system, equipment and storage medium for a stirring system, which monitor the distance between the stirring paddle and the wall of the stirring barrel to reduce the incidence of the stirring paddle touching the wall of the stirring barrel and scraping metal particles from the barrel wall, and reduce the risk of metal particles merging into the slurry and affecting the performance of the manufactured battery cells.

[0005] According to a first aspect of an embodiment of the present application, a monitoring method for a stirring system is provided, comprising:

[0006] Obtaining the rotation speed according to the rotation signal of the stirring paddle detected by the eddy current sensor disposed outside the stirring barrel;

[0007] According to the rotation speed and the first distance, a corresponding amplitude standard value is obtained, wherein the first distance is the distance between the eddy current sensor and the outer surface of the wall of the mixing barrel; the amplitude standard value is the amplitude corresponding to the rotation signal of the stirring paddle when the distance between the stirring paddle and the wall of the mixing barrel belongs to a preset safety interval;

[0008] Convert the rotation signal from the time domain to the frequency domain to obtain a corresponding frequency domain signal;

[0009] Judging whether a condition for issuing a warning on the risk of the stirring paddle touching the wall is met according to the corresponding amplitude standard value and the frequency domain signal;

[0010] When the conditions for issuing a warning about the risk of the stirring paddle touching the wall are met, a corresponding warning strategy is executed.

[0011] The monitoring method of the stirring system of the embodiment of the present application obtains the rotation speed according to the rotation signal of the stirring paddle detected by the eddy current sensor arranged on the outside of the stirring barrel, obtains the corresponding amplitude standard value according to the rotation speed and the first distance, converts the rotation signal from the time domain to the frequency domain to obtain the corresponding frequency domain signal, and judges whether the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met according to the aforementioned corresponding amplitude standard value and the frequency domain signal. When the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met, the corresponding warning strategy is executed, so that a warning can be issued in time when the distance between the stirring paddle and the barrel wall of the stirring barrel is too close and there is a high risk of touching, so as to remind relevant personnel to take timely measures to prevent the stirring paddle from touching the barrel wall of the stirring barrel, thereby greatly reducing the risk of touching, and reducing the probability of the stirring paddle touching the barrel wall and scraping off metal particles, which helps to improve the performance of the manufactured battery.

[0012] In some embodiments of the present application, at least one eddy current sensor is disposed outside the mixing barrel; judging whether the condition for warning the risk of the mixing paddle touching the wall is met according to the corresponding amplitude standard value and the frequency domain signal includes:

[0013] Acquire a numerical relationship between the amplitude of the frequency domain signal and the corresponding amplitude standard value;

[0014] Whether the condition for issuing a warning of the risk of the stirring paddle touching the wall is met is judged according to the numerical relationship corresponding to each sensor in the at least one eddy current sensor, thereby improving the accuracy of judging whether the condition for issuing a warning of the risk of the stirring paddle touching the wall is met.

[0015] In some embodiments of the present application, the acquiring the numerical relationship between the amplitude of the frequency domain signal and the corresponding amplitude standard value includes:

[0016] Obtaining an absolute value of a difference between the amplitude of the corresponding frequency domain signal and a standard value of the amplitude corresponding to the first distance;

[0017] The absolute value of the difference is compared with a preset threshold value to obtain a comparison result, which represents the numerical relationship and can accurately reflect the distance between the stirring paddle and the wall of the stirring barrel, so as to accurately execute the corresponding warning strategy.

[0018] In some embodiments of the present application, judging whether the condition for issuing a warning of the risk of the stirring paddle touching the wall is met according to the numerical relationship corresponding to each sensor of the at least one eddy current sensor includes:

[0019] When the absolute value of the difference of the comparison results corresponding to each sensor is less than the preset alarm threshold, and there is at least one comparison result in which the absolute value of the difference is greater than or equal to the preset warning threshold, it is determined that the condition for issuing a warning signal for the risk of the impeller touching the wall is met; and the preset warning threshold is less than the preset alarm threshold;

[0020] When at least one comparison result corresponding to each sensor has a difference absolute value greater than or equal to a preset alarm threshold, it is determined that a condition for issuing an alarm signal for the risk of the impeller touching the wall is met;

[0021] When the absolute value of the difference of the comparison results corresponding to each sensor is smaller than the preset warning threshold, it is determined that the condition for issuing a warning on the risk of the impeller touching the wall is not met.

[0022] In this way, the accuracy of judging whether the conditions for issuing a warning about the risk of the stirring paddle touching the wall are met can be improved, so that a refined warning strategy can be implemented according to the distance between the stirring paddle and the wall of the mixing barrel, thereby improving the warning effect.

[0023] In some embodiments of the present application, when the condition for warning the risk of the stirring paddle touching the wall is met, executing a corresponding warning strategy includes:

[0024] When the conditions for issuing a warning signal for the risk of the impeller touching the wall are met, the control sends out a warning signal;

[0025] When the condition for issuing an alarm signal for the risk of the stirring paddle touching the wall is met, the control sends an alarm signal and stops the rotation of the stirring paddle.

[0026] When the distance between the stirring paddle and the wall of the mixing barrel is close, a warning is issued in time to remind relevant personnel to take handling measures to reduce the probability of contact between the stirring paddle and the wall of the mixing barrel.

[0027] In some embodiments of the present application, the method further includes: when the condition for issuing a warning about the risk of the agitator paddle touching the wall is not met, controlling the current operating state of the agitator paddle to maintain, thereby improving the stability of the operating state of the agitator paddle.

[0028] In some embodiments of the present application, acquiring the corresponding amplitude standard value according to the rotation speed and the first distance includes:

[0029] According to the rotation speed, the first distance and a pre-acquired first corresponding relationship, acquiring a standard amplitude value corresponding to the first distance;

[0030] The first corresponding relationship is the corresponding relationship between the stirring blade rotation speed, the first distance and the standard value of the frequency domain signal amplitude.

[0031] The amplitude standard value is the amplitude corresponding to the rotation signal of the stirring paddle when the distance between the stirring paddle and the wall of the stirring barrel is within a preset safety range. The amplitude standard value corresponding to the first distance can be accurately determined through the pre-acquired first corresponding relationship, which helps to improve the accuracy of the early warning.

[0032] In some embodiments of the present application, obtaining the first corresponding relationship includes:

[0033] Acquire multiple first distances and multiple data sets corresponding to each first distance from the stirring operation history data, each of the data sets including pre-obtained mutually related stirring paddle rotation speeds and frequency domain signal amplitude standard values; in each stirring in the stirring operation history data, the distance between the stirring paddle and the wall of the stirring barrel is within a preset safety distance range;

[0034] Based on multiple historical data sets corresponding to each of the first distances, a second corresponding relationship corresponding to each of the first distances is obtained, and each of the first distances and the second corresponding relationship corresponding to each of the first distances constitute the first corresponding relationship, and the second corresponding relationship is the corresponding relationship between the agitator speed and the standard value of the frequency domain signal amplitude.

[0035] The first corresponding relationship obtained based on the stirring operation history data can more accurately reflect the correlation between the first distance, the stirring paddle rotation speed and the standard value of the frequency domain signal amplitude.

[0036] In some embodiments of the present application, at least one eddy current sensor is disposed outside the mixing barrel; the mixer where the stirring paddle is located has a first number of stirring paddles; and obtaining the rotation speed according to the rotation signal of the stirring paddle detected by the eddy current sensor disposed outside the mixing barrel includes:

[0037] For each of the at least one eddy current sensor, acquiring the number of stirring paddle rotation signals detected by the eddy current sensor within a first preset time period;

[0038] Obtaining a first ratio of the number of the stirring paddle rotation signals to the first number;

[0039] Obtaining a second ratio of the first ratio to the first preset time length;

[0040] The average value of the second ratios of all the eddy current sensors is obtained to obtain the rotation speed.

[0041] By obtaining the average value of the second ratios of all eddy current sensors, the obtained rotation speed has higher accuracy.

[0042] According to a second aspect of the embodiments of the present application, a monitoring device for a stirring system is provided, comprising:

[0043] A rotation speed acquisition module, used to acquire the rotation speed according to a rotation signal of the stirring paddle detected by an eddy current sensor disposed outside the stirring barrel;

[0044] an amplitude standard value acquisition module, for acquiring a corresponding amplitude standard value according to the rotation speed and the first distance, wherein the first distance is the distance between the eddy current sensor and the outer surface of the wall of the mixing barrel; the amplitude standard value is the amplitude corresponding to the rotation signal of the stirring paddle when the distance between the stirring paddle and the wall of the mixing barrel belongs to a preset safety interval;

[0045] A frequency domain signal acquisition module, used to convert the rotation signal from the time domain to the frequency domain to obtain a corresponding frequency domain signal;

[0046] A judgment module, used for judging whether the condition for issuing a warning on the risk of the stirring paddle touching the wall is met according to the corresponding amplitude standard value and the frequency domain signal;

[0047] The warning strategy execution module is used to execute the corresponding warning strategy when the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met.

[0048] The monitoring device for the stirring system of the second aspect of the embodiment of the present application can achieve the same technical effect as the first aspect of the embodiment of the present application.

[0049] According to a third aspect of the embodiment of the present application, a monitoring system for a stirring system is provided, comprising a data collector, a programmable logic controller (PLC), and an eddy current sensor disposed outside a stirring barrel; the eddy current sensor, the data collector, and the PLC are connected in sequence;

[0050] The data collector is used to obtain the rotation speed according to the rotation signal of the stirring paddle detected by the eddy current sensor arranged outside the stirring barrel, and obtain the corresponding amplitude standard value according to the rotation speed and the first distance, wherein the first distance is the distance between the eddy current sensor and the outer surface of the barrel wall of the stirring barrel, and convert the rotation signal from the time domain to the frequency domain to obtain the corresponding frequency domain signal;

[0051] The PLC is used to determine whether the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met based on the corresponding amplitude standard value and the frequency domain signal, and execute the corresponding warning strategy when the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met.

[0052] The monitoring system of the stirring system of the third aspect of the embodiment of the present application can achieve the same technical effect as the first aspect of the embodiment of the present application.

[0053] According to a fourth aspect of the embodiments of the present application, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement a monitoring method for a stirring system according to any embodiment of the present application.

[0054] The electronic device of the fourth aspect of the embodiment of the present application can achieve the same technical effect as the first aspect of the embodiment of the present application.

[0055] According to a fifth aspect of the embodiments of the present application, a computer-readable storage medium is provided, on which a computer program is stored. The computer program is executed by a processor to implement the monitoring method of the stirring system of any embodiment of the present application.

[0056] The computer-readable storage medium of the fifth aspect of the embodiment of the present application can achieve the same technical effect as the first aspect of the embodiment of the present application.

[0057] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] By reading the detailed description of the following embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used to illustrate the embodiments of the present application and are not to be considered as limitations of the present application. In addition, the same reference numerals are used to represent the same components throughout the drawings.

[0059] Figure 1 Schematic diagram of the structure of a monitoring system for a stirring system according to one or more embodiments.

[0060] Figure 2 The present invention is a flow chart of a monitoring method of a stirring system according to one or more embodiments.

[0061] Figure 3 The present invention is a flow chart of providing an early warning of a stirring blade touching a wall according to an amplitude standard value and a frequency domain signal according to one or more embodiments.

[0062] Figure 4 The figure is a structural block diagram of a monitoring device for a stirring system according to one or more embodiments.

[0063] Figure 5 is a structural block diagram of an electronic device according to one or more embodiments. DETAILED DESCRIPTION

[0064] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0066] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), unless otherwise clearly and specifically defined.

[0067] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0068] With the vigorous development of new energy technologies, power batteries are increasingly widely used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, as well as electric vehicles such as electric bicycles, electric motorcycles, electric cars, military equipment, aerospace and other fields. With the continuous expansion of the application field of power batteries, its market demand is also increasing, and the battery manufacturing industry has also developed rapidly.

[0069] Slurry preparation is an important step in the battery manufacturing process. The battery slurry preparation process is to evenly disperse the positive and negative active material powders, conductive agent powders, polymer binders and additives in the solution and stir to form a stable suspension. The solution is placed in a stirring barrel and stirred in the stirring barrel by a stirring paddle to prepare a stable suspension. When stirring the slurry, the stirring paddle is likely to touch the wall of the stirring barrel and scrape off metal particles from the barrel wall. These metal particles will merge into the slurry, resulting in the risk of metal particles flowing out. The slurry doped with metal particles is used to manufacture battery cells. These metal particles will affect the performance of the manufactured battery cells, resulting in a decrease in battery cell performance.

[0070] In response to the above-mentioned problems existing in the related art, an embodiment of the present application provides a monitoring method for a stirring system, wherein the rotation speed is obtained according to a rotation signal of a stirring paddle detected by an eddy current sensor arranged outside the stirring barrel, and a corresponding amplitude standard value is obtained according to the rotation speed and a first distance, wherein the first distance is the distance between the eddy current sensor and the outer surface of the barrel wall of the stirring barrel, and then the rotation signal is converted from the time domain to the frequency domain to obtain a corresponding frequency domain signal, and whether the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met are determined according to the corresponding amplitude standard value and the frequency domain signal. When the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met, a corresponding warning strategy is executed, so that a warning can be issued in time when the distance between the stirring paddle and the barrel wall of the stirring barrel is too close and there is a high risk of touching, so as to remind relevant personnel to take timely measures to prevent the stirring paddle from touching the barrel wall of the stirring barrel, thereby greatly reducing the risk of touching, and reducing the probability of the stirring paddle touching the barrel wall and scraping off metal particles, which helps to improve the performance of the manufactured battery.

[0071] refer to Figure 1 As shown, Figure 1 A monitoring system for a stirring system is shown, which is used to implement the monitoring method for a stirring system of an embodiment of the present application. The early warning system includes a data collector, a programmable logic controller PLC, an eddy current sensor 1 and an eddy current sensor 2, the eddy current sensor 1 and the eddy current sensor 2 are arranged outside the stirring barrel 5 of the mixer, and the mixer also includes a stirring paddle 3 and a stirring paddle 4 arranged in the stirring barrel 5, and the stirring paddle 3 and the stirring paddle 4 are used to stir the solution in the stirring barrel 5 to prepare a slurry. The eddy current sensor 1 and the eddy current sensor 2 are arranged outside the stirring barrel 5 at a preset distance from the outer surface of the barrel wall, and the eddy current sensor 1 and the eddy current sensor 2 are both connected to the data collector; the eddy current sensor 1 and the eddy current sensor 2 collect the speed signal of the stirring paddle 3 and the stirring paddle 4, and send the collected speed signal to the data collector, and the data collector performs data processing on the speed signal from the time domain to the frequency domain; the programmable logic controller PLC is connected to the data collector in communication, and the data collector sends the processed speed signal to the PLC; the data collector can be powered by a 220V power supply. There may be multiple locations for setting the eddy current sensor, and the location may be, for example, a location 2 mm, 5 mm, or 10 mm away from the outer surface of the barrel wall.

[0072] An eddy current sensor is a sensor that measures the relative position between a metal object and the probe end face based on the eddy current effect.

[0073] A monitoring method for a stirring system proposed according to an embodiment of the present application is described below in conjunction with the accompanying drawings.

[0074] refer to Figure 2As shown, an embodiment of the present application provides a monitoring method for a stirring system, which may include steps S10 to S40:

[0075] S10, obtaining a rotation speed according to a rotation signal of a stirring paddle detected by an eddy current sensor disposed outside the stirring barrel.

[0076] At least one eddy current sensor is arranged outside the mixing barrel, for example, 1, 2, 3 or other number of eddy current sensors may be arranged. The mixer where the stirring paddle is located has a first number of stirring paddles, for example, the first number may be 2, 3 or 4. The mixing barrel is cylindrical. The distances between each eddy current sensor and the outer surface of the mixing barrel are the same. The distance between the eddy current sensor and the outer surface of the mixing barrel is equal to the difference between the distance between the eddy current sensor (the eddy current sensor may be equivalent to a point) and the central axis of the mixing barrel and the radius of the mixing barrel.

[0077] Exemplarily, step S10 may include: for each of the at least one eddy current sensor, obtaining the number of stirring paddle rotation signals detected by the eddy current sensor within a first preset time period; obtaining a first ratio of the number of stirring paddle rotation signals to the first number; obtaining a second ratio of the first ratio to the first preset time period; obtaining an average value of the second ratios of all eddy current sensors to obtain a rotation speed. By obtaining the average value of the second ratios of all eddy current sensors, the obtained rotation speed has a higher accuracy.

[0078] In a specific example, two eddy current sensors are arranged outside the mixing barrel, which are respectively referred to as the first eddy current sensor and the second eddy current sensor. The first number is 2, that is, the mixer has two stirring paddles, and the first preset time is 1 minute. For each of the two eddy current sensors, the number of stirring paddle rotation signals detected by the eddy current sensor within 1 minute is obtained, and a first ratio of the number of stirring paddle rotation signals to the first number is calculated. The second ratio of the first ratio to the first preset time is calculated, and the average value of the second ratio of each eddy current sensor is obtained to obtain the rotation speed. Assuming that the first eddy current sensor detects 58 agitator paddle rotation signals and the second eddy current sensor detects 62 agitator paddle rotation signals, the first ratio of the 58 agitator paddle rotation signals detected by the first eddy current sensor to the first number is 58 / 2=29, and the ratio of the 62 agitator rotation signals detected by the second eddy current sensor to the first number is 62 / 2=31. The second ratio corresponding to the first eddy current sensor is (29 / 1)(rpm / min)=29rpm / min, and the second ratio corresponding to the second eddy current sensor is (31 / 1)(rpm / min)=31rpm / min. The average value of the second ratio corresponding to the first eddy current sensor and the second ratio corresponding to the second eddy current sensor is (29rpm / min+29rpm / min) / 2=30rpm / min, i.e. the rotation speed is 30rpm / min.

[0079] S20. Obtain a corresponding amplitude standard value according to the rotation speed and the first distance.

[0080] The first distance is the distance between the eddy current sensor and the outer surface of the mixing barrel wall. The amplitude standard value is the amplitude corresponding to the rotation signal of the stirring paddle when the distance between the stirring paddle and the mixing barrel wall is within the preset safety interval. Within the preset safety interval, the stirring paddle will not touch the mixing barrel wall, and the preset safety interval can be set according to actual operating experience.

[0081] The amplitude standard value is a reference value used to determine whether the distance between the stirring paddle and the wall of the mixing barrel is within the preset safety distance range. When the difference between the amplitude corresponding to the stirring paddle rotation signal and the amplitude standard value is small during actual operation, the risk of the stirring paddle touching the wall of the mixing barrel is low. When the difference between the amplitude corresponding to the stirring paddle rotation signal and the amplitude standard value is large, the risk of the stirring paddle touching the wall of the mixing barrel is high. The amplitude standard value corresponding to the first distance can be accurately determined through the pre-acquired first corresponding relationship, which helps to improve the accuracy of the warning.

[0082] Different first distances or different stirring paddle speeds may lead to different amplitude standard values. When both the first distance and the stirring paddle speed are determined, the corresponding amplitude standard value can be determined. For example, when the first distance is 5mm and the speed is 30rpm / min, the corresponding amplitude standard value is 10.0466; when the first distance is 5mm and the speed is 20rpm / min, the corresponding amplitude standard value is 6.045; when the first distance is 10mm and the speed is 30rpm / min, the corresponding amplitude standard value is 8.462075; when the first distance is 10mm and the speed is 20 rpm / min, the corresponding amplitude standard value is 4.4464; when the first distance is 10mm and the speed is 10 rpm / min, the corresponding amplitude standard value is 1.9316; and so on.

[0083] In some embodiments, the amplitude standard value corresponding to the first distance can be obtained based on the rotational speed, the first distance and a pre-acquired first corresponding relationship; wherein the first corresponding relationship is the corresponding relationship between the impeller rotational speed, the first distance and the frequency domain signal amplitude standard value.

[0084] The first correspondence is obtained in advance, and multiple first distances and multiple data sets corresponding to each first distance can be obtained from the stirring operation history data, and then based on the multiple historical data sets corresponding to each first distance, the second correspondence corresponding to each first distance is obtained, and each first distance and the second correspondence corresponding to each first distance constitute the first correspondence. Wherein, each data set includes pre-obtained mutually related stirring paddle speeds and frequency domain signal amplitude standard values; in each stirring in the stirring operation history data, the distance between the stirring paddle and the wall of the stirring barrel is within the preset safety distance range; the first distance can be, for example, 2mm, 5mm, 10mm, etc.; the second correspondence is the correspondence between the stirring paddle speed and the frequency domain signal amplitude standard value. Usually, in the second correspondence, when the stirring paddle speed is determined, the frequency domain signal amplitude standard value can also be determined accordingly. The first correspondence obtained based on the stirring operation history data can more accurately reflect the correlation between the first distance, the stirring paddle speed and the frequency domain signal amplitude standard value.

[0085] The first correspondence includes a plurality of corresponding data sets of the first distance, the stirring blade speed and the amplitude standard value, which can be stored in a database in a table form for easy retrieval. When the stirring blade speed and the first distance are determined, the corresponding amplitude standard value can be directly found from the table of the first correspondence.

[0086] Specifically, multiple historical data sets corresponding to each first distance can be fitted to obtain the second corresponding relationship corresponding to each first distance; multiple historical data sets corresponding to each first distance can also be processed by interpolation or least squares method to obtain the second corresponding relationship corresponding to each first distance.

[0087] The stirring operation historical data may be stirring operation experimental data obtained through a stirring operation experiment. For example, the process of obtaining stirring operation experimental data through a stirring operation experiment may include the following steps:

[0088] The eddy current sensor 1 and the eddy current sensor 2 are fixedly installed at a position at a preset distance from the outer surface of the barrel wall of the mixing barrel 5 (the distance between the eddy current sensor and the outer surface of the barrel wall is adjustable, for example, one eddy current sensor is arranged at a position 5 mm outside the mixing barrel, and the other is arranged at a position 10 mm outside the mixing barrel) to collect data.

[0089] The eddy current sensor 1 and the eddy current sensor 2 were respectively moved 8 times with a movement distance of 0.5 mm each time (used to adjust the accuracy of position monitoring; the movement distance each time can be adjusted according to different accuracy requirements). The rotation data of the agitator paddle at 8 different positions were collected to obtain 8 sets of data for calibrating the position of the agitator paddle. The 8 sets of collected data were processed by converting time domain to frequency domain. The rotation data corresponding to the agitator at 3 rotation speeds (10 rpm / min, 20 rpm / min and 30 rpm / min) were measured.

[0090] When the stirring paddle runs at the process speed, according to the relationship between frequency f and speed (speed is expressed as nrpm / min), the frequency f=(n / 60)HZ is obtained, and the relationship between frequency f and period T is t=1 / f. For example, if the stirring paddle process speed is 30rpm, the frequency f=(30 / 60)HZ=0.5HZ, and the period T=1 / f=2s. Since the mixer has two stirring paddles, and the two stirring paddles are symmetrically arranged on the same straight line, the frequency amplitude of one paddle can be monitored within 1s, and the amplitude corresponds to the actual position of the stirring paddle.

[0091] Table 1 shows the experimental measurement data, which are the experimental measurement data when the distance between the eddy current sensor and the outer surface of the mixing barrel wall is 5 mm and 10 mm respectively, and the mixer speed is 10 rpm, 20 rpm, and 30 rpm respectively. Among them, when the distance between the eddy current sensor and the outer wall surface of the mixing barrel is 10 mm, when the speed of the stirring paddle changes from 10 rpm / min to 20 rpm / min, the amplitude changes from 1.9316 to 4.4464.

[0092] When the distance between the eddy current sensor and the outer surface of the mixing barrel wall is the same, the greater the linear speed of the stirring paddle, the greater the corresponding amplitude. Similarly, the actual position of the stirring paddle in each cycle can be obtained according to the mixer speed. The actual position monitored is compared with the preset threshold to determine whether the mixer needs to be stopped.

[0093] Table 1

[0094]

[0095] In this way, stirring operation experimental data for reference were obtained.

[0096] S30, converting the aforementioned rotation signal from the time domain to the frequency domain to obtain a corresponding frequency domain signal.

[0097] The aforementioned rotation signal can be converted from the time domain to the frequency domain by Fourier transform or Laplace transform to obtain a corresponding frequency domain signal.

[0098] S40: judging whether the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met according to the corresponding amplitude standard value and the frequency domain signal.

[0099] Specifically, the amplitude corresponding to the agitator paddle rotation signal detected by the eddy current sensor (i.e., the amplitude of the aforementioned frequency domain signal) can be compared with the aforementioned corresponding amplitude standard value. If the difference between the amplitude corresponding to the agitator paddle rotation signal and the aforementioned corresponding amplitude standard value is large, it is necessary to issue a warning signal to remind relevant personnel to take timely measures to prevent the agitator paddle from touching the wall of the mixing barrel (i.e., to prevent the agitator paddle from touching the wall).

[0100] Exemplarily, at least one eddy current sensor is disposed outside the mixing barrel, and the distances between each eddy current sensor and the outer surface of the mixing barrel are equal. Figure 3 As shown, judging whether the condition for issuing a warning of the risk of the stirring paddle touching the wall is met according to the aforementioned corresponding amplitude standard value and the aforementioned frequency domain signal may include steps S401 to S402:

[0101] S401. Obtain a numerical relationship between the amplitude of the aforementioned frequency domain signal and the corresponding amplitude standard value.

[0102] Specifically, the absolute value of the difference between the amplitude of the aforementioned corresponding frequency domain signal and the amplitude standard value corresponding to the first distance can be obtained first, and then the absolute value of the difference can be compared with the preset threshold value to obtain a comparison result. The comparison result represents the aforementioned numerical relationship and can accurately reflect the distance between the agitator and the wall of the agitator barrel, so as to accurately execute the warning strategy. The preset threshold value may include a preset early warning threshold value and a preset alarm threshold value. The preset early warning threshold value is less than the preset alarm threshold value. The comparison result may be that the absolute value of the difference is less than the preset early warning threshold value, the absolute value of the difference is not less than the preset early warning threshold value and less than the preset alarm threshold value, and the absolute value of the difference is greater than or equal to the preset alarm threshold value.

[0103] S402: Determine whether a condition for issuing a warning on the risk of a stirring paddle touching the wall is met based on a numerical relationship corresponding to each sensor in the at least one eddy current sensor.

[0104] This can improve the accuracy of determining whether the conditions for issuing a warning of the risk of the stirring paddle touching the wall (ie, the stirring paddle touching the wall of the mixing tank) are met.

[0105] In some embodiments, judging whether the condition for issuing a warning of the risk of the stirring paddle touching the wall is met according to the numerical relationship corresponding to each sensor in the at least one eddy current sensor may include:

[0106] When the comparison results corresponding to each sensor are all differences with an absolute value less than a preset alarm threshold, and there is at least one comparison result with an absolute value of the difference greater than or equal to the preset warning threshold, it is determined that the conditions for issuing a warning signal for the risk of the agitator paddle touching the wall are met; the preset warning threshold is less than the preset warning threshold; that is, if multiple eddy current sensors are provided, then as long as the comparison result corresponding to one sensor among the multiple eddy current sensors meets the warning condition (that is, the absolute value of the difference is greater than or equal to the preset warning threshold), it is determined that the conditions for issuing a warning for the risk of the agitator paddle touching the wall are met, and the warning signal is controlled to be issued, which can improve the warning sensitivity and the accuracy of the alarm, and reduce the probability of missing the warning signal due to an eddy current sensor detecting incorrectly (for example, a total of two eddy current sensors are provided, and one of the sensors detects incorrectly, resulting in the corresponding comparison result having an absolute value of the difference being less than the preset warning threshold).

[0107] When there is at least one comparison result in the comparison results corresponding to each sensor in which the absolute value of the difference is greater than or equal to the preset alarm threshold, it is determined that the condition for issuing an alarm signal for the risk of the stirring paddle touching the wall is met; in this way, when multiple eddy current sensors are set, as long as the comparison result corresponding to one sensor meets the alarm condition (that is, the absolute value of the difference is greater than or equal to the preset alarm threshold), it is determined that the condition for issuing an alarm signal for the risk of the stirring paddle touching the wall is met, and the alarm signal is controlled to be issued and the rotation of the stirring paddle is stopped, thereby improving the alarm sensitivity and alarm accuracy, and reducing the probability of missing the alarm signal and failing to control the stopping of the rotation of the stirring paddle in time due to an eddy current sensor detecting error (for example, there are two eddy current sensors in total, and one of the sensors detects incorrectly, resulting in the corresponding comparison result having an absolute value of the difference being less than the preset alarm threshold);

[0108] When the absolute value of the difference of the comparison results corresponding to each sensor is smaller than the preset warning threshold, it is determined that the condition for issuing a warning on the risk of the impeller touching the wall is not met.

[0109] In this way, the accuracy of judging whether the conditions for issuing a warning about the risk of the agitator paddle touching the wall are met can be further improved, which helps to implement a refined warning strategy based on the distance between the agitator paddle and the wall of the mixing barrel, thereby improving the warning effect.

[0110] S50: When the condition for issuing a warning on the risk of the stirring paddle touching the wall is met, executing a corresponding warning strategy.

[0111] Exemplarily, when the conditions for issuing a warning about the risk of the stirring paddle touching the wall are met, executing a corresponding warning strategy may include: when the conditions for issuing a warning signal about the risk of the stirring paddle touching the wall are met, controlling the issuance of a warning signal; when the conditions for issuing a warning signal about the risk of the stirring paddle touching the wall are met, controlling the issuance of a warning signal and stopping the rotation of the stirring paddle. In this way, a warning can be issued in time when the distance between the stirring paddle and the wall of the stirring barrel is close, so as to remind relevant personnel to take handling measures and reduce the probability of contact between the stirring paddle and the wall of the stirring barrel. In this way, it is possible to implement a refined warning strategy based on the distance between the stirring paddle and the wall of the stirring barrel to improve the warning effect.

[0112] Exemplarily, the method may further include: when the condition for issuing a warning about the risk of the stirring paddle touching the wall is not met, controlling the current operating state of the stirring paddle to maintain, thereby improving the stability of the operating state of the stirring paddle.

[0113] In a specific example, assuming that only one eddy current sensor is set, when the rotation speed of the stirring paddle is 30 rpm / min and the eddy current sensor is set at a distance of 5 mm from the outer surface of the stirring barrel, the amplitude deviation value corresponding to the safety distance between the stirring paddle and the inner surface of the stirring barrel is set to 3, the preset warning threshold is 3.5, and the preset alarm threshold is 4;

[0114] Assuming that the amplitude of the frequency domain signal corresponding to the rotation signal is 8, and the standard amplitude value corresponding to the first distance is 10.0466, the absolute value of the difference between the two is |10.0466-8|=2.0466, that is, the agitator deviates from the standard value by 2.0466. The absolute value of the difference 2.0466 is less than the preset warning threshold of 3.5, so the control maintains the current operating state of the agitator and continues to operate;

[0115] Assuming that the amplitude of the frequency domain signal corresponding to the rotation signal is 6.5, and the standard amplitude value corresponding to the first distance is 10.0466, the absolute value of the difference between the two is |10.0466-6.5|=3.5466, that is, the agitator paddle deviates from the standard value by 3.5466, and the absolute value of the difference 3.5466 ≥ the preset warning threshold 3.5, then the control sends out a warning signal;

[0116] Assuming that the amplitude of the frequency domain signal corresponding to the rotation signal is 6, and the standard amplitude value corresponding to the first distance is 10.0466, the absolute value of the difference between the two is |10.0466-6|=4.0466, that is, the agitator deviates from the standard value of 4.0466. The absolute value of the difference 4.0466 ≥ the preset alarm threshold 4, then the control sends an alarm signal and controls to stop the rotation of the agitator.

[0117] The early warning signal and the alarm signal include but are not limited to sound and light signals, text messages, etc. The text messages can be information sent to the mobile terminal of the staff, such as a mobile phone, etc. The early warning signal and the alarm signal are different. For example, the sound of the early warning signal is different from the sound of the alarm signal, or the light signal of the early warning signal is different from the light signal of the alarm signal, etc., so that the relevant personnel can identify the received signal as a early warning signal or an alarm signal.

[0118] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar parts can be referenced to each other, and for the sake of brevity, they will not be repeated in this article.

[0119] In a specific example, two eddy current sensors are arranged outside the mixing barrel, namely, a first eddy current sensor and a second eddy current sensor, and the mixer has two stirring paddles, which are located in the mixing barrel. The monitoring method of the stirring system in this example obtains, for each of the two eddy current sensors, the number of stirring paddle rotation signals detected by the eddy current sensor within a first preset time length, obtains a first ratio of the number of stirring paddle rotation signals to the first number; obtains a second ratio of the first ratio to the first preset time length; obtains an average value of the second ratio of the first eddy current sensor and the second ratio of the second eddy current sensor, and obtains the rotation speed.

[0120] According to the aforementioned rotation speed, the first distance and the pre-acquired first corresponding relationship, the amplitude standard value corresponding to the first distance is obtained; the first corresponding relationship is the corresponding relationship between the stirring paddle rotation speed, the first distance and the frequency domain signal amplitude standard value. The first distance is the distance between the eddy current sensor and the outer surface of the mixing barrel wall; the amplitude standard value is the amplitude corresponding to the rotation signal of the stirring paddle when the distance between the stirring paddle and the mixing barrel wall is within the preset safety range.

[0121] The first corresponding relationship is obtained in advance, and multiple first distances and multiple data sets corresponding to each first distance are obtained from the stirring operation history data, each data set includes pre-obtained interrelated stirring paddle speeds and frequency domain signal amplitude standard values, and in each stirring in the stirring operation history data, the distance between the stirring paddle and the wall of the stirring barrel is within the preset safety distance range; multiple historical data sets corresponding to each first distance are fitted to obtain the second corresponding relationship corresponding to each first distance, and each first distance and the second corresponding relationship corresponding to each first distance constitute the first corresponding relationship, and the second corresponding relationship is the corresponding relationship between the stirring paddle speed and the frequency domain signal amplitude standard value.

[0122] The aforementioned rotation signal is converted from the time domain to the frequency domain through Fourier transform to obtain the corresponding frequency domain signal.

[0123] The absolute value of the difference between the amplitude of the frequency domain signal and the amplitude standard value corresponding to the first distance is obtained, and then the absolute value of the difference is compared with a preset threshold to obtain a comparison result, which represents the aforementioned numerical relationship.

[0124] If the absolute value of the difference between the first result and the second result is less than the preset alarm threshold, and at least one of the first result and the second result has an absolute value of the difference greater than or equal to the preset warning threshold, the control sends a warning signal; wherein the first result is the comparison result corresponding to the first eddy current sensor, the second result is the comparison result corresponding to the second eddy current sensor, the preset warning threshold is 3.5, and the preset alarm threshold is 4.

[0125] If the absolute value of the difference between at least one of the first result and the second result is greater than or equal to the preset alarm threshold, the control sends an alarm signal and stops the rotation of the stirring paddle.

[0126] If the absolute values ​​of the differences between the first result and the second result are both smaller than the preset warning threshold, the control maintains the current operating state of the impeller.

[0127] The early warning signal and the alarm signal both include sound and light signals. The sound signal of the early warning signal is different from the sound signal of the alarm signal, and the light signal of the early warning signal is also different from the light signal of the alarm signal. The sound signal is emitted by a buzzer, and the light signal is emitted by a light emitting diode.

[0128] The monitoring method of the stirring system in this example can monitor the distance between the stirring paddle and the wall of the stirring barrel in real time during the slurry making process, and issue a timely warning when the distance between the stirring paddle and the wall of the stirring barrel is too close and there is a high risk of contact, so as to remind relevant personnel to take timely measures to prevent the stirring paddle from touching the wall of the stirring barrel, greatly reducing the risk of contact, and reducing the probability of the stirring paddle touching the barrel wall and scraping off metal particles, which helps to improve the performance of the manufactured battery. The method in this example does not require the embedding of magnets in the stirring paddle, which increases the life of the stirring paddle and reduces the safety risk of using the stirring paddle; the warning result of the method in this example is highly accurate, and can accurately warn of the stirring paddle touching the wall of the stirring barrel, thereby reducing the risk of the stirring paddle scraping the wall and causing the slurry to flow out, improving the quality of slurry shipments and reducing the cost of equipment failure.

[0129] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar parts can be referenced to each other, and for the sake of brevity, they will not be repeated in this article.

[0130] refer to Figure 4 As shown, another embodiment of the present application provides a monitoring device for a stirring system, which may include:

[0131] A rotation speed acquisition module, used to acquire the rotation speed according to a rotation signal of the stirring paddle detected by an eddy current sensor disposed outside the stirring barrel;

[0132] The amplitude standard value acquisition module is used to acquire the corresponding amplitude standard value according to the aforementioned rotation speed and the first distance, wherein the first distance is the distance between the eddy current sensor and the outer surface of the wall of the mixing barrel; the amplitude standard value is the amplitude corresponding to the rotation signal of the stirring paddle when the distance between the stirring paddle and the wall of the mixing barrel belongs to a preset safety interval;

[0133] A frequency domain signal acquisition module, used to convert the rotation signal from the time domain to the frequency domain to obtain a corresponding frequency domain signal;

[0134] A judgment module, used for judging whether the condition for issuing a warning on the risk of the stirring paddle touching the wall is met according to the corresponding amplitude standard value and the frequency domain signal;

[0135] The warning strategy execution module is used to execute the corresponding warning strategy when the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met.

[0136] Exemplarily, at least one eddy current sensor is disposed outside the mixing barrel, and each eddy current sensor is equidistant from the outer surface of the mixing barrel; the judgment module may include:

[0137] A numerical relationship acquisition submodule, used to acquire the numerical relationship between the amplitude of the frequency domain signal and the corresponding amplitude standard value;

[0138] The judgment submodule is used to judge whether the condition for issuing a warning on the risk of the stirring paddle touching the wall is met according to the numerical relationship corresponding to each sensor of the at least one eddy current sensor.

[0139] Exemplarily, the numerical relationship acquisition submodule includes:

[0140] A difference absolute value acquisition unit, used to acquire the absolute value of the difference between the amplitude of the frequency domain signal and the corresponding amplitude standard value;

[0141] The comparison unit is used to compare the absolute value of the difference with a preset threshold value to obtain a comparison result, wherein the comparison result represents the numerical relationship.

[0142] Exemplarily, the determination submodule is further specifically used for:

[0143] When the absolute value of the difference of the comparison results corresponding to each sensor is less than the preset alarm threshold, and there is at least one comparison result in which the absolute value of the difference is greater than or equal to the preset warning threshold, it is determined that the condition for issuing a warning signal for the risk of the impeller touching the wall is met; and the preset warning threshold is less than the preset alarm threshold;

[0144] When at least one comparison result corresponding to each sensor has a difference absolute value greater than or equal to a preset alarm threshold, it is determined that a condition for issuing an alarm signal for the risk of the impeller touching the wall is met;

[0145] When the absolute value of the difference of the comparison results corresponding to each sensor is smaller than the preset warning threshold, it is determined that the condition for issuing a warning on the risk of the impeller touching the wall is not met.

[0146] In some embodiments, the warning strategy execution module is further specifically used to: when the conditions for issuing a warning signal for the risk of the stirring paddle touching the wall are met, control the issuance of a warning signal; when the conditions for issuing an alarm signal for the risk of the stirring paddle touching the wall are met, control the issuance of an alarm signal and stop the rotation of the stirring paddle.

[0147] In some embodiments, the device may further include an operation status maintaining module, which is used to control and maintain the current operation status of the stirring paddle when the condition for issuing an alert for the risk of the stirring paddle touching the wall is not met.

[0148] Exemplarily, the amplitude standard value acquisition module is further specifically used to obtain the amplitude standard value corresponding to the first distance based on the rotational speed, the first distance and a pre-acquired first corresponding relationship; the first corresponding relationship is the correspondence between the agitator speed, the first distance and the frequency domain signal amplitude standard value.

[0149] Exemplarily, the early warning device further includes a first corresponding relationship acquisition module, which is used to acquire the first corresponding relationship. The first corresponding relationship acquisition module may include:

[0150] a first acquisition unit, configured to acquire a plurality of the first distances and a plurality of data sets corresponding to each of the first distances from the stirring operation history data, wherein each of the data sets includes pre-obtained mutually related stirring paddle rotation speeds and frequency domain signal amplitude standard values; in each stirring in the stirring operation history data, the distance between the stirring paddle and the wall of the stirring barrel is within a preset safety distance range;

[0151] The second acquisition unit is used to acquire the second corresponding relationship corresponding to each first distance based on multiple historical data sets corresponding to each first distance, and the first distances and the second corresponding relationship corresponding to each first distance constitute the first corresponding relationship, and the second corresponding relationship is the corresponding relationship between the agitator speed and the standard value of the frequency domain signal amplitude.

[0152] Exemplarily, at least one eddy current sensor is disposed outside the mixing barrel; the mixer where the stirring paddle is located has a first number of stirring paddles; and the rotation speed acquisition module may include:

[0153] A first acquisition unit is used to acquire, for each of the at least one eddy current sensor, the number of stirring paddle rotation signals detected by the eddy current sensor within a first preset time length;

[0154] A second acquisition unit, used for acquiring a first ratio of the number of the stirring paddle rotation signals to the first number;

[0155] A third acquisition unit, used to acquire a second ratio of the first ratio to the first preset time length;

[0156] The fourth acquisition unit is used to acquire an average value of the second ratios of all the eddy current sensors to obtain the rotational speed.

[0157] The monitoring device of the stirring system of the embodiment of the present application can obtain the rotation speed based on the rotation signal of the stirring paddle detected by the eddy current sensor arranged outside the stirring barrel, obtain the corresponding amplitude standard value based on the rotation speed and the first distance, convert the rotation signal from the time domain to the frequency domain to obtain the corresponding frequency domain signal, and judge whether the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met based on the aforementioned corresponding amplitude standard value and the frequency domain signal. When the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met, the corresponding warning strategy is executed, so that a warning can be issued in time when the distance between the stirring paddle and the barrel wall of the stirring barrel is too close and there is a high risk of touching, so as to remind relevant personnel to take timely measures to prevent the stirring paddle from touching the barrel wall of the stirring barrel, thereby greatly reducing the risk of touching, and reducing the probability of the stirring paddle touching the barrel wall and scraping off metal particles, which helps to improve the performance of the manufactured battery.

[0158] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar parts can be referenced to each other, and for the sake of brevity, they will not be repeated in this article.

[0159] Another embodiment of the present application provides a monitoring system for a stirring system, comprising a data acquisition device, a programmable logic controller (PLC), and an eddy current sensor arranged on the outside of a stirring barrel; the eddy current sensor, the data acquisition device, and the PLC are connected in sequence; the data acquisition device is used to obtain a rotation speed based on a rotation signal of a stirring paddle detected by the eddy current sensor arranged on the outside of the stirring barrel, and to obtain a corresponding amplitude standard value based on the rotation speed and a first distance, wherein the first distance is the distance between the eddy current sensor and the outer surface of the barrel wall of the stirring barrel, and the rotation signal is converted from the time domain to the frequency domain to obtain a corresponding frequency domain signal; the PLC is used to determine whether a condition for issuing an alert for a risk of a stirring paddle touching the wall is met based on the corresponding amplitude standard value and the frequency domain signal, and to execute a corresponding alert strategy when the condition for issuing an alert for a risk of a stirring paddle touching the wall is met.

[0160] The PLC can also be used to control and maintain the current operating state of the stirring paddle when the condition for issuing an alert for the risk of the stirring paddle touching the wall is not met.

[0161] Exemplarily, acquiring a corresponding amplitude standard value according to the rotation speed and the first distance includes:

[0162] According to the rotation speed, the first distance and a pre-acquired first corresponding relationship, acquiring a standard amplitude value corresponding to the first distance;

[0163] The first corresponding relationship is the corresponding relationship between the stirring blade rotation speed, the first distance and the standard value of the frequency domain signal amplitude.

[0164] Exemplarily, obtaining the first corresponding relationship includes:

[0165] Acquire multiple first distances and multiple data sets corresponding to each first distance from the stirring operation history data, each of the data sets including pre-obtained mutually related stirring paddle rotation speeds and frequency domain signal amplitude standard values; in each stirring in the stirring operation history data, the distance between the stirring paddle and the wall of the stirring barrel is within a preset safety distance range;

[0166] Based on multiple historical data sets corresponding to each of the first distances, a second corresponding relationship corresponding to each of the first distances is obtained, and each of the first distances and the second corresponding relationship corresponding to each of the first distances constitute the first corresponding relationship, and the second corresponding relationship is the corresponding relationship between the agitator speed and the standard value of the frequency domain signal amplitude.

[0167] Exemplarily, at least one eddy current sensor is disposed outside the mixing barrel; the mixer where the stirring paddle is located has a first number of stirring paddles; and the rotating speed is obtained according to the rotation signal of the stirring paddle detected by the eddy current sensor disposed outside the mixing barrel, including:

[0168] For each of the at least one eddy current sensor, acquiring the number of stirring paddle rotation signals detected by the eddy current sensor within a first preset time period;

[0169] Obtaining a first ratio of the number of the stirring paddle rotation signals to the first number;

[0170] Obtaining a second ratio of the first ratio to the first preset time length;

[0171] The average value of the second ratios of all the eddy current sensors is obtained to obtain the rotation speed.

[0172] Exemplarily, at least one eddy current sensor is provided on the outside of the mixing barrel; judging whether the condition for issuing a warning for the risk of the mixing paddle touching the wall is met based on the corresponding amplitude standard value and the frequency domain signal, comprises: obtaining the numerical relationship between the amplitude of the frequency domain signal and the corresponding amplitude standard value; judging whether the condition for issuing a warning for the risk of the mixing paddle touching the wall is met based on the numerical relationship corresponding to each sensor in the at least one eddy current sensor.

[0173] Exemplarily, obtaining the numerical relationship between the amplitude of the frequency domain signal and the corresponding amplitude standard value includes: obtaining the absolute value of the difference between the amplitude of the frequency domain signal and the corresponding amplitude standard value; comparing the absolute value of the difference with a preset threshold to obtain a comparison result, and the comparison result represents the numerical relationship.

[0174] Exemplarily, judging whether the condition for issuing a warning for the risk of the agitator paddle touching the wall is met based on the numerical relationship corresponding to each sensor of the at least one eddy current sensor includes: when the comparison results corresponding to each sensor are all differences with an absolute value less than a preset alarm threshold, and there is at least one comparison result with an absolute value of the difference greater than or equal to a preset early warning threshold, judging that the condition for issuing a warning signal for the risk of the agitator paddle touching the wall is met; the preset early warning threshold is less than the preset alarm threshold; when there is at least one comparison result in the comparison results corresponding to each sensor with an absolute value of the difference greater than or equal to the preset alarm threshold, judging that the condition for issuing a warning signal for the risk of the agitator paddle touching the wall is met; when the comparison results corresponding to each sensor are all differences with an absolute value less than the preset early warning threshold, judging that the condition for issuing a warning for the risk of the agitator paddle touching the wall is not met.

[0175] Exemplarily, when the conditions for issuing a warning about the risk of the stirring paddle touching the wall are met, a corresponding warning strategy is executed, including: when the conditions for issuing a warning signal about the risk of the stirring paddle touching the wall are met, controlling the issuing of a warning signal; when the conditions for issuing a warning signal about the risk of the stirring paddle touching the wall are met, controlling the issuing of a warning signal and stopping the rotation of the stirring paddle.

[0176] The monitoring system of the stirring system of the embodiment of the present application can obtain the rotation speed based on the rotation signal of the stirring paddle detected by the eddy current sensor arranged outside the stirring barrel, obtain the corresponding amplitude standard value based on the rotation speed and the first distance, convert the rotation signal from the time domain to the frequency domain to obtain the corresponding frequency domain signal, and judge whether the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met based on the aforementioned corresponding amplitude standard value and the frequency domain signal. When the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met, the corresponding warning strategy is executed, so that a warning can be issued in time when the distance between the stirring paddle and the barrel wall of the stirring barrel is too close and there is a high risk of touching, so as to remind relevant personnel to take timely measures to prevent the stirring paddle from touching the barrel wall of the stirring barrel, thereby greatly reducing the risk of touching, and reducing the probability of the stirring paddle touching the barrel wall and scraping off metal particles, which helps to improve the performance of the manufactured battery.

[0177] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar parts can be referenced to each other, and for the sake of brevity, they will not be repeated in this article.

[0178] Another embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the monitoring method of a stirring system according to any of the above embodiments.

[0179] refer to Figure 5 As shown, the electronic device 10 may include: a processor 100, a memory 101, a bus 102 and a communication interface 103, and the processor 100, the communication interface 103 and the memory 101 are connected via the bus 102; the memory 101 stores a computer program that can be run on the processor 100, and when the processor 100 runs the computer program, it executes the method provided in any of the aforementioned embodiments of the present application.

[0180] The memory 101 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The communication connection between the device network element and at least one other network element is realized through at least one communication interface 103 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used.

[0181] The bus 102 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory 101 is used to store a program, and the processor 100 executes the program after receiving an execution instruction. The method disclosed in any implementation of the aforementioned embodiment of the present application may be applied to the processor 100, or implemented by the processor 100.

[0182] The processor 100 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor 100 or an instruction in the form of software. The above processor 100 may be a general-purpose processor, which may include a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 101, and the processor 100 reads the information in the memory 101 and completes the steps of the above method in combination with its hardware.

[0183] The electronic device provided in the embodiment of the present application and the method provided in the embodiment of the present application are based on the same inventive concept and have the same beneficial effects as the method adopted, operated or implemented by them.

[0184] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar parts can be referenced to each other, and for the sake of brevity, they will not be repeated in this article.

[0185] Another embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, and the computer program is executed by a processor to implement the monitoring method of a stirring system according to any of the above embodiments.

[0186] It should be noted that examples of computer-readable storage media may include, but are not limited to, optical disks, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical or magnetic storage media, which are not listed here one by one.

[0187] The computer-readable storage medium provided in the above-mentioned embodiments of the present application and the method provided in the embodiments of the present application are based on the same inventive concept and have the same beneficial effects as the method adopted, run or implemented by the application program stored therein.

[0188] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar parts can be referenced to each other, and for the sake of brevity, they will not be repeated in this article.

[0189] It should be noted that:

[0190] The term "module" is not intended to be limited to a specific physical form. Depending on the specific application, a module can be implemented as hardware, firmware, software, and / or a combination thereof. In addition, different modules can share common components or even be implemented by the same components. There may or may not be clear boundaries between different modules.

[0191] The algorithm and display provided herein are not inherently related to any specific computer, virtual device or other equipment. Various general devices can also be used together with examples based on this. According to the above description, it is obvious to construct the structure required for this type of device. In addition, the application is not directed to any specific programming language yet. It should be understood that various programming languages ​​can be utilized to realize the content of the application described herein, and the description made to specific languages ​​above is for the purpose of disclosing the best mode of implementation of the application.

[0192] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0193] The above embodiments only express the implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A monitoring method for a stirring system, characterized in that: include: Obtaining the rotation speed according to the rotation signal of the stirring paddle detected by the eddy current sensor disposed outside the stirring barrel; According to the rotation speed and the first distance, a corresponding amplitude standard value is obtained, wherein the first distance is the distance between the eddy current sensor and the outer surface of the wall of the mixing barrel; the amplitude standard value is the amplitude corresponding to the rotation signal of the stirring paddle when the distance between the stirring paddle and the wall of the mixing barrel belongs to a preset safety interval; Convert the rotation signal from the time domain to the frequency domain to obtain a corresponding frequency domain signal; Judging whether a condition for issuing a warning on the risk of the stirring paddle touching the wall is met according to the corresponding amplitude standard value and the frequency domain signal; When the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met, a corresponding warning strategy is executed.

2. The method according to claim 1, characterized in that At least one eddy current sensor is disposed outside the mixing barrel; judging whether the condition for warning the risk of the mixing paddle touching the wall is met according to the corresponding amplitude standard value and the frequency domain signal, comprises: Acquire a numerical relationship between the amplitude of the frequency domain signal and the corresponding amplitude standard value; According to the numerical relationship corresponding to each sensor of the at least one eddy current sensor, it is determined whether the condition for issuing a warning on the risk of the stirring paddle touching the wall is met.

3. The method according to claim 2, characterized in that The obtaining of the numerical relationship between the amplitude of the frequency domain signal and the corresponding amplitude standard value comprises: Obtaining an absolute value of a difference between the amplitude of the frequency domain signal and the corresponding amplitude standard value; The absolute value of the difference is compared with a preset threshold to obtain a comparison result, wherein the comparison result represents the numerical relationship.

4. The method according to claim 3, characterized in that The determining, based on the numerical relationship corresponding to each sensor of the at least one eddy current sensor, whether the condition for issuing a warning on the risk of the stirring paddle touching the wall is met includes: When the absolute value of the difference of the comparison results corresponding to each sensor is less than the preset alarm threshold, and there is at least one comparison result in which the absolute value of the difference is greater than or equal to the preset warning threshold, it is determined that the condition for issuing a warning signal for the risk of the impeller touching the wall is met; and the preset warning threshold is less than the preset alarm threshold; When at least one comparison result corresponding to each sensor has a difference absolute value greater than or equal to a preset alarm threshold, determining that a condition for issuing an alarm signal for the risk of the impeller touching the wall is met; When the absolute value of the difference of the comparison results corresponding to each sensor is smaller than the preset warning threshold, it is determined that the condition for issuing a warning on the risk of the impeller touching the wall is not met.

5. The method according to claim 4, characterized in that When the condition for issuing a warning on the risk of the stirring blade touching the wall is met, executing a corresponding warning strategy includes: When the conditions for issuing a warning signal for the risk of the impeller touching the wall are met, the control sends out a warning signal; When the condition for issuing an alarm signal for the risk of the stirring paddle touching the wall is met, the control sends an alarm signal and stops the rotation of the stirring paddle.

6. The method according to any one of claims 1 to 4, characterized in that The method further includes: when the condition for issuing a warning on the risk of the stirring paddle touching the wall is not met, controlling the stirring paddle to maintain the current operating state.

7. The method according to any one of claims 1 to 4, characterized in that The step of obtaining a corresponding amplitude standard value according to the rotation speed and the first distance includes: According to the rotation speed, the first distance and a pre-acquired first corresponding relationship, acquiring a standard amplitude value corresponding to the first distance; The first corresponding relationship is the corresponding relationship between the stirring blade rotation speed, the first distance and the standard value of the frequency domain signal amplitude.

8. The method according to claim 7, characterized in that Acquiring the first corresponding relationship includes: Acquire multiple first distances and multiple data sets corresponding to each first distance from the stirring operation history data, each of the data sets including pre-obtained mutually related stirring paddle rotation speeds and frequency domain signal amplitude standard values; in each stirring in the stirring operation history data, the distance between the stirring paddle and the wall of the stirring barrel is within a preset safety distance range; Based on multiple historical data sets corresponding to each of the first distances, a second corresponding relationship corresponding to each of the first distances is obtained, and each of the first distances and the second corresponding relationship corresponding to each of the first distances constitute the first corresponding relationship, and the second corresponding relationship is the corresponding relationship between the agitator speed and the standard value of the frequency domain signal amplitude.

9. The method according to any one of claims 1 to 4, characterized in that At least one eddy current sensor is disposed outside the mixing barrel; the mixer where the mixing paddle is located has a first number of mixing paddles; The method of obtaining the rotation speed according to the rotation signal of the stirring paddle detected by the eddy current sensor disposed outside the stirring barrel includes: For each of the at least one eddy current sensor, acquiring the number of stirring paddle rotation signals detected by the eddy current sensor within a first preset time period; Obtaining a first ratio of the number of the stirring paddle rotation signals to the first number; Obtaining a second ratio of the first ratio to the first preset time length; The average value of the second ratios of all the eddy current sensors is obtained to obtain the rotation speed.

10. A monitoring device for a stirring system, characterized in that: include: A rotation speed acquisition module, used to acquire the rotation speed according to a rotation signal of the stirring paddle detected by an eddy current sensor disposed outside the stirring barrel; an amplitude standard value acquisition module, for acquiring a corresponding amplitude standard value according to the rotation speed and the first distance, wherein the first distance is the distance between the eddy current sensor and the outer surface of the wall of the mixing barrel; the amplitude standard value is the amplitude corresponding to the rotation signal of the stirring paddle when the distance between the stirring paddle and the wall of the mixing barrel belongs to a preset safety interval; A frequency domain signal acquisition module, used to convert the rotation signal from the time domain to the frequency domain to obtain a corresponding frequency domain signal; A judgment module, used for judging whether the condition for issuing a warning on the risk of the stirring paddle touching the wall is met according to the corresponding amplitude standard value and the frequency domain signal; The warning strategy execution module is used to execute the corresponding warning strategy when the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met.

11. A monitoring system for a stirring system, characterized in that: It includes a data collector, a programmable logic controller (PLC), and an eddy current sensor arranged outside the mixing barrel; the eddy current sensor, the data collector, and the PLC are connected in sequence; The data collector is used to obtain the rotation speed according to the rotation signal of the stirring paddle detected by the eddy current sensor arranged outside the stirring barrel, and obtain the corresponding amplitude standard value according to the rotation speed and the first distance, wherein the first distance is the distance between the eddy current sensor and the outer surface of the barrel wall of the stirring barrel, and convert the rotation signal from the time domain to the frequency domain to obtain the corresponding frequency domain signal; The PLC is used to determine whether the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met based on the corresponding amplitude standard value and the frequency domain signal, and execute the corresponding warning strategy when the conditions for issuing a warning on the risk of the stirring paddle touching the wall are met.

12. An electronic device, characterized in that: The system comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the monitoring method of the stirring system according to any one of claims 1 to 9.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that: The computer program is executed by a processor to implement the monitoring method of a stirring system according to any one of claims 1 to 9.

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