A stirring rod position detection data processing method and system

Abstract

The present invention provides a stirring rod position detection data processing method and system, which belongs to the field of equipment detection technology and is used to process pre-acquired analog electrical signals generated by the stirring rod of a target stirring device cutting a magnetic field at different positions at a target speed. The method and system include: processing the analog electrical signals generated by the stirring rod at different positions to generate corresponding digital signals; performing spectrum analysis on the digital signals corresponding to the stirring rod at different positions to obtain corresponding signal characteristic values; and establishing a stirring rod position detection model for the target stirring device at a target speed based on the signal characteristic values ​​corresponding to the stirring rod at different positions. The present invention uses data calibration to establish a stirring rod position detection model for the target stirring device at a target speed for subsequent stirring rod position detection, thereby achieving position detection of the stirring rod of the stirring device without affecting the production process or damaging the structure of the stirring system.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment detection, and in particular to a stirring rod position detection data processing method and system. Background Art

[0002] After long-term operation, slurry mixing equipment (such as mixing tanks) can experience mechanical degradation, leading to the risk of scraping the mixing rod against the tank wall. Metal debris generated by scraping against the tank wall can contaminate the entire tank slurry and damage the mixing equipment, resulting in financial losses and reduced production efficiency. Therefore, online monitoring of the stirring rod's position is essential. When the stirring rod reaches a dangerous distance, a warning or alarm is issued, allowing operators to take preventive measures.

[0003] Existing technologies typically use a production stoppage for maintenance, resulting in low production efficiency. This method also lacks online monitoring and poses production risks. Alternatively, some proposals have proposed embedding a sensor unit in the stirring rod and adding a corresponding detection device to the outside of the mixing barrel for detection. However, this would damage the stirring rod structure, increase the number of steps, and the embedded sensor unit would pose a risk of contamination to the slurry.

[0004] Therefore, how to detect the position of the stirring rod of the stirring equipment without affecting the production process and destroying the structure of the stirring system is an urgent problem to be solved. Summary of the Invention

[0005] The present invention provides a stirring rod position detection data processing method and system, which are used to solve the problem in the prior art that it is difficult to detect the stirring rod position without affecting the production process and without destroying the stirring system structure.

[0006] In the first aspect, the present invention provides a stirring rod position detection data processing method for processing pre-acquired analog electrical signals generated by a stirring rod of a target stirring device cutting a magnetic field at different positions at a target speed, comprising: processing the analog electrical signals generated by the stirring rod at different positions to generate corresponding digital signals; performing spectrum analysis on the digital signals corresponding to the stirring rod at different positions to obtain corresponding signal characteristic values; establishing a stirring rod position detection model for the target stirring device at a target speed based on the signal characteristic values ​​corresponding to the stirring rod at different positions; wherein the input of the stirring rod position detection model is the signal characteristic value corresponding to the analog electrical signal at the target speed, and the output is the position of the stirring rod.

[0007] According to the stirring rod position detection data processing method provided by the present invention, the analog electrical signal generated by the stirring rod at any position is processed to generate a digital signal, including: performing a first preprocessing on the analog electrical signal; the content of the first preprocessing includes one or more of the following preprocessing operations: filtering processing, signal amplification processing; performing analog-to-digital conversion on the preprocessed analog signal to generate an initial digital signal; performing a second preprocessing on the initial digital signal; the content of the second preprocessing includes one or more of the following preprocessing operations: digital smoothing processing, digital filtering processing and environmental noise compensation processing.

[0008] According to the stirring rod position detection data processing method provided by the present invention, a spectrum analysis is performed on the digital signal corresponding to the stirring rod at any position to obtain the signal characteristic value, including: performing Fourier transform on the digital signal to obtain the spectrum of the digital signal; determining the frequency range according to the target rotation speed of the stirring rod; calculating the spectrum energy of the spectrum of the digital signal within the frequency range, and using the spectrum energy as the signal characteristic value.

[0009] According to the stirring rod position detection data processing method provided by the present invention, a stirring rod position detection model for the target stirring device at the target speed is established based on the signal characteristic values ​​corresponding to the stirring rod at different positions, including: performing numerical fitting on the position of the stirring rod and the corresponding signal characteristic values ​​to obtain a fitting function; using the fitting function as the stirring rod position detection model, and marking the target stirring device and target speed to which the stirring rod position detection model is applicable.

[0010] According to the stirring rod position detection data processing method provided by the present invention, a stirring rod position detection model for the target stirring device at the target speed is established based on the signal characteristic values ​​corresponding to the stirring rod at different positions, including: using the position of the stirring rod and the corresponding signal characteristic value as training data; using the training data to train a machine learning model; wherein the input of the machine learning model is the signal characteristic value, and the output is the position; using the trained machine learning model as the stirring rod position detection model, and marking the target stirring device and target speed applicable to the stirring rod position detection model.

[0011] According to the method for processing stirring rod position detection data provided by the present invention, the position of the stirring rod is represented by the distance between the stirring rod and the side wall of the target stirring device.

[0012] The method for processing stirring rod position detection data provided by the present invention further includes: determining the duration of the acquired analog electrical signal according to a target rotational speed of the stirring rod of the target stirring device.

[0013] In a second aspect, the present invention further provides a stirring rod position detection system for a stirring device, comprising: a magnetic field generating module, a magnetic field detecting module, and a detection data processing module;

[0014] The magnetic field generating module is used to generate a magnetic field; wherein the magnetic field penetrates the current stirring device and acts on the stirring rod to be tested of the current stirring device;

[0015] The magnetic field detection module is used to sense the dynamic magnetic field generated when the stirring rod to be tested cuts the magnetic field at a set rotation speed, and generate an analog electrical signal;

[0016] The detection data processing module is used to process the analog electrical signal to generate a digital signal, perform spectrum analysis on the digital signal, obtain signal characteristic values, input the signal characteristic values ​​into the corresponding stirring rod position detection model, and output the position of the stirring rod to be tested;

[0017] The stirring rod position detection model is constructed using any of the above-mentioned stirring rod position detection data processing methods.

[0018] According to the stirring rod position detection system of the stirring device provided by the present invention, the magnetic field generating module and the magnetic field detecting module are located on the same side of the current stirring device;

[0019] The magnetic field generating module includes a permanent magnet, and the magnetic field detecting module includes two induction coils; the two induction coils are coaxially arranged at both ends of the permanent magnet, and the axes are perpendicular to the cylinder surface of the current stirring device;

[0020] Among them, the induction coil farther away from the current stirring device is used to sense the dynamic magnetic field generated when the stirring rod cuts the magnetic field, and generate a first electromotive force signal; the induction coil closer to the current stirring device is used to sense the dynamic magnetic field generated when the stirring rod cuts the magnetic field, and generate a second electromotive force signal;

[0021] The magnetic field detection module is further used to perform differential processing on the second electromotive force signal and the first electromotive force signal to generate an analog electrical signal to be processed.

[0022] In a third aspect, the present invention provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of any of the above-described methods for processing stirring rod position detection data are implemented.

[0023] In a fourth aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the above-described stirring rod position detection data processing methods.

[0024] The stirring rod position detection data processing method and system provided by the present invention processes the analog electrical signals generated by the stirring rods of the target stirring device cutting the magnetic field at different positions at the target speed, and uses data calibration to establish a stirring rod position detection model of the target stirring device at the target speed for subsequent stirring rod position detection, thereby realizing the position detection of the stirring rods of the stirring device without affecting the production process and without destroying the structure of the stirring system; and the present invention is applicable to stirring devices with any number of stirring rods, any structure, and any speed, and has high precision in stirring rod position detection for different types of stirring devices.

[0025] In the process of data processing, the present invention uses the spectrum energy within a specific frequency range as the signal characteristic value of the stirring rod instead of a single spectrum peak, which can improve the detection accuracy of the stirring rod position. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 1 is a flow chart of a method for processing stirring rod position detection data provided by the present invention;

[0028] Figure 2 It is a structural schematic diagram of a stirring rod position detection system for a stirring device provided by the present invention;

[0029] Figure 3 Schematic diagram of the principle of position detection using electromagnetic induction provided by the present invention;

[0030] Figure 4 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0032] It should be noted that, in the description of the embodiments of the present invention, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "include a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] The terms "first," "second," and the like in this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that such terms are interchangeable where appropriate, so that embodiments of this application can be implemented in an order other than that illustrated or described herein. Furthermore, the terms "first," "second," and the like generally distinguish objects of a class and do not limit the number of objects; for example, the first object can be one or more. Furthermore, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the connected objects.

[0034] The following combination Figure 1-Figure 4 The stirring rod position detection data processing method and system provided by the embodiments of the present invention are described.

[0035] Figure 1 : is a flow chart of the stirring rod position detection data processing method provided by the present invention, which is used to process the analog electrical signal (i.e. stirring rod position detection data) generated by the stirring rod of the target stirring device cutting the magnetic field at different positions at the target speed. Figure 1 As shown, including but not limited to the following steps:

[0036] Step 101: Processing analog electrical signals generated by a stirring rod at different positions to generate corresponding digital signals.

[0037] The present invention may use the distance between the stirring rod and the side wall of the target stirring device to characterize the position of the stirring rod.

[0038] The stirring rod in the present invention is placed in a pre-set magnetic field. The stirring rod (conductive material) cuts through the magnetic field and generates eddy currents within the stirring rod, which in turn generates a dynamic magnetic field. The present invention can also place one or more magnetic sensors (such as Hall effect sensors) around the stirring device. These magnetic sensors can capture changes in the dynamic magnetic field and convert them into analog electrical signals.

[0039] The present invention can use an analog-to-digital converter (ADC) to convert analog electrical signals into digital signals. Simultaneously, the present invention can also pre-process the analog electrical signals before analog-to-digital conversion using signal processing circuits such as amplifiers and filters to ensure the quality of the analog electrical signals.

[0040] As an optional embodiment, the present invention processes the analog electrical signal generated by the stirring rod at any position to generate a digital signal, including but not limited to the following steps:

[0041] (1) Performing a first preprocessing on the analog electrical signal; the first preprocessing includes one or more of the following preprocessing operations: filtering processing, signal amplification processing.

[0042] The present invention may use an analog filter (such as a low-pass filter, a high-pass filter, or a band-pass filter) to remove unwanted frequency components.

[0043] The present invention can enhance the amplitude of the analog electrical signal through the amplifier, especially when the collected analog electrical signal is weak, so as to better utilize the analog-to-digital converter for analog-to-digital conversion.

[0044] (2) Perform analog-to-digital conversion on the preprocessed analog signal to generate an initial digital signal.

[0045] (3) performing a second preprocessing on the initial digital signal; the second preprocessing includes one or more of the following preprocessing operations: digital smoothing processing, digital filtering processing, and environmental noise compensation processing.

[0046] The present invention can use moving average or other types of digital smoothing algorithms to reduce random fluctuations in digital signals. The present invention can also be designed according to specific needs and use digital filters to remove interference of specific frequencies. If there is a continuous noise source in the environment, the present invention can also compensate by pre-measuring the background noise and subtracting this part of the noise from the signal.

[0047] Step 102: Perform spectrum analysis on the digital signals corresponding to the stirring rod at different positions to obtain corresponding signal characteristic values.

[0048] The present invention performs frequency domain analysis on each segment of the collected digital signal to obtain a spectrum. Furthermore, from the spectrum, certain frequency components or parameters (such as peak frequency and energy distribution) can be determined as signal characteristic values. These signal characteristic values ​​can well reflect the changing characteristics of the magnetic field generated by the stirring rod at different positions.

[0049] Step 103: Based on the signal characteristic values ​​corresponding to the stirring rod at different positions, a stirring rod position detection model for the target stirring device at the target speed is established; wherein the input of the stirring rod position detection model is the signal characteristic value corresponding to the analog electrical signal at the target speed, and the output is the position of the stirring rod.

[0050] The stirring rod position detection model in the present invention is targeted at a specific target stirring device and established at a target speed. The stirring rod position prediction model can be a machine learning model, such as a support vector machine, a neural network, etc., or it can be a signal characteristic value-stirring rod position function formed by a numerical fitting algorithm.

[0051] As an optional embodiment, the stirring rod position detection data processing method provided by the present invention, when the stirring rod position detection model is a machine learning model, includes but is not limited to the following steps:

[0052] (1) The position of the stirring rod and the corresponding signal feature value are used as training data.

[0053] The present invention can pair each position and its corresponding signal characteristic value to form training data.

[0054] Optionally, when selecting training data, the present invention ensures that the training data covers most possible position ranges and has a sufficient sample size to ensure the generalization ability of the model.

[0055] (2) Using the training data, train a machine learning model; wherein the input of the machine learning model is the signal feature value and the output is the position.

[0056] Among them, the machine learning model can be a decision tree regression model, a support vector machine, a random forest or a neural network, etc.

[0057] (3) The trained machine learning model is used as the stirring rod position detection model, and the target stirring device and target speed applicable to the stirring rod position detection model are marked.

[0058] As an optional embodiment, the stirring rod position detection data processing method provided by the present invention, when the stirring rod position detection model is a fitting function, further includes but is not limited to the following steps:

[0059] (1) Perform numerical fitting on the position of the stirring rod and the corresponding signal characteristic value to obtain the fitting function.

[0060] The present invention can use the least square method or other numerical fitting algorithms to perform numerical fitting, wherein the fitting function can be a polynomial function.

[0061] (2) The fitting function is used as the stirring rod position detection model, and the target stirring equipment and target speed applicable to the stirring rod position detection model are marked.

[0062] The present invention adds applicable target stirring equipment and target speed to the model, so as to facilitate the subsequent establishment of a stirring rod position detection model library. When performing position detection of stirring rods of stirring equipment of different types and speeds, the corresponding model can be directly called according to the model annotation.

[0063] It should be noted that the signal characteristic values ​​and position data used to construct the stirring rod position detection model will inevitably contain abnormal data. The present invention can analyze the multiple pairs of signal characteristic values ​​and position data obtained, and eliminate the abnormal data to ensure the prediction accuracy of the stirring rod position detection model.

[0064] The stirring rod position detection data processing method provided by the present invention processes the analog electrical signals generated by the stirring rods of the target stirring device cutting the magnetic field at different positions at the target rotational speed, and uses data calibration to establish a stirring rod position detection model of the target stirring device at the target rotational speed for use in subsequent stirring rod position detection, thereby realizing position detection of the stirring rods of the stirring device without affecting the production process and without destroying the structure of the stirring system; and the present invention is applicable to stirring devices with any number of stirring rods, any structure, and any rotational speed, and has high precision in stirring rod position detection for different types of stirring devices.

[0065] Based on the content of the above embodiment, as an optional embodiment, the present invention provides a method for processing stirring rod position detection data, which performs spectrum analysis on the digital signal corresponding to the stirring rod at any position to obtain signal characteristic values, including but not limited to the following steps:

[0066] (1) Perform Fourier transform on the digital signal to obtain the spectrum of the digital signal.

[0067] The spectrum obtained by Fourier transform shows the energy distribution of the signal, that is, the energy proportion occupied by different frequency components.

[0068] (2) Determine the frequency range based on the target speed of the stirring rod.

[0069] Generally, the fundamental frequency (base frequency) is first calculated based on the rotation speed of the stirring rod.

[0070] If the stirring rod rotates at NRPM (revolutions per minute), the fundamental frequency f_0 can be calculated using the following formula:

[0071] f_0=N / 60.

[0072] For example, if the stirring rod rotates at 100 RPM, the fundamental frequency f_0 is:

[0073] 100 / 60≈1.67Hz.

[0074] The frequency range in the present invention can be determined based on the fundamental frequency f_0, for example, within the range of one times the fundamental frequency and two times the fundamental frequency, or within the range near the fundamental frequency. The specific frequency range can be determined based on actual conditions.

[0075] (3) Calculate the spectrum energy of the digital signal within the frequency range and use the spectrum energy as the signal characteristic value.

[0076] The spectrum energy can be obtained by integrating or summing the energy at each point in the frequency range.

[0077] In the process of data processing, the present invention uses the spectrum energy within a specific frequency range as the signal characteristic value of the stirring rod instead of a single spectrum peak, which can improve the detection accuracy of the stirring rod position.

[0078] Based on the content of the above embodiment, as an optional embodiment, the stirring rod position detection data processing method provided by the present invention further includes: determining the duration of the acquired analog electrical signal according to the target rotation speed of the stirring rod of the target stirring device.

[0079] Because the rotation speed of the stirring rod directly affects the periodicity and frequency components of the signal, correctly selecting the acquisition time is crucial for accurately obtaining the signal characteristic values.

[0080] The acquisition time should be long enough to fully capture one or more rotation cycles of the stir bar. This ensures that the Fourier transform accurately reflects the signal's primary frequency components. However, the acquisition time should not be too long, as this will affect the system's real-time responsiveness. While maintaining signal quality, the acquisition time should be shortened as needed.

[0081] Figure 2 2 is a schematic structural diagram of a stirring rod position detection system for a stirring device provided by the present invention, wherein the system comprises: a magnetic field generating module 210, a magnetic field detecting module 220, and a detection data processing module 230;

[0082] The magnetic field generating module 210 is used to generate a magnetic field; wherein the magnetic field penetrates the current stirring device and acts on the stirring rod to be tested of the current stirring device.

[0083] The current stirring device can be a mixing tank. The magnetic field generation module generates a stable magnetic field, which can be achieved using electromagnets or permanent magnets. Electromagnets can control the magnetic field strength by adjusting the current, while permanent magnets provide a constant magnetic field. The magnetic field generation module is typically located outside the mixing tank, ensuring that the magnetic field can penetrate the tank wall and interact with the stirring rod inside.

[0084] The magnetic field detection module 220 is used to sense the dynamic magnetic field generated when the stirring rod to be tested cuts the magnetic field at a set rotation speed, and generate an analog electrical signal.

[0085] The stirring rod under test cuts through the magnetic flux lines, generating eddy currents within it. These eddy currents then generate a dynamic magnetic field. The magnetic field detection module can use a Hall effect sensor or a magnetic induction coil. These sensors can capture changes in the dynamic magnetic field and convert them into voltage or current fluctuations. The magnetic field detection module is also placed outside the stirring tank, opposite or adjacent to the magnetic field generation module.

[0086] The detection data processing module 230 is configured to process the analog electrical signal to generate a digital signal, perform spectrum analysis on the digital signal, obtain signal characteristic values, input the signal characteristic values ​​into a corresponding stirring rod position detection model, and output the position of the stirring rod to be detected. The stirring rod position detection model is constructed using any of the aforementioned stirring rod position detection data processing methods.

[0087] The specific method of "processing the analog electrical signal to generate a digital signal, performing spectrum analysis on the digital signal, and obtaining the signal characteristic value" mentioned here can be found in the description of the above embodiment and will not be repeated here.

[0088] Based on the contents of the above embodiments, as an optional embodiment, the present invention provides a stirring rod position detection system for a stirring device, wherein the magnetic field generating module and the magnetic field detecting module are located on the same side of the current stirring device; the magnetic field generating module includes a permanent magnet, and the magnetic field detecting module includes two induction coils; the two induction coils are coaxially arranged at both ends of the permanent magnet, and the axis is perpendicular to the cylinder surface of the current stirring device.

[0089] Among them, the induction coil that is farther away from the current stirring device is used to sense the dynamic magnetic field generated when the stirring rod cuts the magnetic field, and generate a first electromotive force signal; the induction coil that is closer to the current stirring device is used to sense the dynamic magnetic field generated when the stirring rod cuts the magnetic field, and generate a second electromotive force signal; the magnetic field detection module is also used to perform differential processing on the second electromotive force signal and the first electromotive force to generate an analog electrical signal to be processed.

[0090] Figure 3 This is a schematic diagram of the principle of position detection using electromagnetic induction provided by the present invention. Figure 3 The above embodiment is further described.

[0091] like Figure 3 As shown in the figure, two induction coils (which can be cylindrical) are coaxially arranged at both ends of a permanent magnet (which can be cylindrical), and the axis is perpendicular to the surface of the cylinder. The magnetic field generated by the permanent magnet (blue arrow curve) can directly penetrate the cylinder and the slurry. When the stirring rod stirs, the rod cuts the magnetic flux lines and generates eddy currents (red dotted lines) inside it, which then generate a dynamic magnetic field (red arrow curve). Dynamic magnetic field B e Induction electromotive force is generated inside the two induction coils. Specifically, the induction coil farther from the mixing tank generates a first electromotive force signal V1, and the induction coil closer to the mixing tank generates a second electromotive force signal V2.

[0092]

[0093] φ ei is the magnetic flux generated by the dynamic magnetic field at the induction coil, and N is the number of turns of the coil.

[0094] Due to the characteristic that the magnetic field decays exponentially with distance, the induced electromotive force (i.e., the first electromotive force signal) of the induction coil farther away from the stirring cylinder is smaller, and the induced electromotive force (i.e., the second electromotive force signal) of the induction coil closer to the stirring cylinder is larger, and the impact of environmental noise on the two induction coils can be considered to be the same. Therefore, the present invention can eliminate the interference of environmental noise by differentially measuring the electromotive force values ​​of the two induction coils, thereby realizing the detection of the stirring rod position. The magnetic field detection module is also used to perform differential processing on the second electromotive force signal and the first electromotive force to generate an analog electrical signal to be processed, which can effectively suppress common mode noise and enhance useful signals.

[0095] Figure 4 Schematic diagram of the structure of the electronic device provided by the present invention, such as Figure 4 As shown, the electronic device may include: a processor 410, a communication interface 420, a memory 430, and a communication bus 440, wherein the processor 410, the communication interface 420, and the memory 430 communicate with each other via the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute the stirring rod position detection data processing method.

[0096] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0097] On the other hand, the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the stirring rod position detection data processing method provided in the above-mentioned embodiments.

[0098] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is used to execute the stirring rod position detection data processing method provided in the above embodiments when the computer program is executed by a processor.

[0099] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A stirring rod position detection data processing method, characterized in that: The method is used to process the analog electrical signals generated by the stirring rod of the target stirring device cutting the magnetic field at different positions and target rotation speed, including: Processing analog electrical signals generated by the stirring rod at different positions to generate corresponding digital signals; Perform spectrum analysis on the digital signals corresponding to the stirring rod at different positions to obtain corresponding signal characteristic values; Based on the signal characteristic values ​​corresponding to the stirring rod at different positions, a stirring rod position detection model for the target stirring device at the target speed is established; wherein the input of the stirring rod position detection model is the signal characteristic value corresponding to the analog electrical signal at the target speed, and the output is the position of the stirring rod; According to the signal characteristic values ​​corresponding to the stirring rod at different positions, a stirring rod position detection model for the target stirring equipment at the target speed is established, including: Perform numerical fitting on the position of the stirring rod and the corresponding signal characteristic value to obtain a fitting function; Use the fitting function as the stirring rod position detection model and mark the target stirring device and target speed applicable to the stirring rod position detection model; or According to the signal characteristic values ​​corresponding to the stirring rod at different positions, a stirring rod position detection model of the target stirring device at the target speed is established, which also includes: The position of the stirring rod and the corresponding signal characteristic value are used as training data; Using the training data, a machine learning model is trained; wherein the input of the machine learning model is the signal feature value, and the output is the position; The trained machine learning model is used as the stirring rod position detection model, and the target stirring device and target speed applicable to the stirring rod position detection model are marked.

2. The stirring rod position detection data processing method according to claim 1, characterized in that: The analog electrical signal generated by the stirring rod at any position is processed to generate a digital signal, including: Performing a first preprocessing on the analog electrical signal; the first preprocessing includes one or more of the following preprocessing operations: filtering processing, signal amplification processing; Performing analog-to-digital conversion on the preprocessed analog signal to generate an initial digital signal; The initial digital signal is subjected to a second preprocessing; the second preprocessing includes one or more of the following preprocessing operations: digital smoothing processing, digital filtering processing, and environmental noise compensation processing.

3. The stirring rod position detection data processing method according to claim 1, characterized in that: Perform spectrum analysis on the digital signal corresponding to the stirring rod at any position to obtain signal characteristic values, including: Perform Fourier transform on the digital signal to obtain the spectrum of the digital signal; Determine the frequency range based on the target speed of the stirring rod; Calculate the spectrum energy of the digital signal within the frequency range and use the spectrum energy as the signal characteristic value.

4. The stirring rod position detection data processing method according to claim 1, characterized in that: The position of the stirring rod is characterized by the distance between the stirring rod and the side wall of the target stirring device.

5. The stirring rod position detection data processing method according to claim 1, characterized in that: Also includes: The duration of the acquired analog electrical signal is determined according to the target rotational speed of the stirring rod of the target stirring device.

6. A stirring rod position detection system for a stirring device, characterized in that: include: A magnetic field generating module, a magnetic field detecting module, and a detection data processing module; The magnetic field generating module is used to generate a magnetic field; wherein the magnetic field penetrates the current stirring device and acts on the stirring rod to be tested of the current stirring device; The magnetic field detection module is used to sense the dynamic magnetic field generated when the stirring rod to be tested cuts the magnetic field at a set rotation speed, and generate an analog electrical signal; The detection data processing module is used to process the analog electrical signal to generate a digital signal, perform spectrum analysis on the digital signal, obtain signal characteristic values, input the signal characteristic values ​​into the corresponding stirring rod position detection model, and output the position of the stirring rod to be tested; The stirring rod position detection model is constructed using the stirring rod position detection data processing method according to any one of claims 1 to 5.

7. The stirring rod position detection system of a stirring device according to claim 6, characterized in that: The magnetic field generating module and the magnetic field detecting module are located on the same side of the current stirring device; The magnetic field generating module includes a permanent magnet, and the magnetic field detecting module includes two induction coils; the two induction coils are coaxially arranged at both ends of the permanent magnet, and the axes are perpendicular to the cylinder surface of the current stirring device; Among them, the induction coil farther away from the current stirring device is used to sense the dynamic magnetic field generated when the stirring rod cuts the magnetic field, and generate a first electromotive force signal; the induction coil closer to the current stirring device is used to sense the dynamic magnetic field generated when the stirring rod cuts the magnetic field, and generate a second electromotive force signal; The magnetic field detection module is further used to perform differential processing on the second electromotive force signal and the first electromotive force signal to generate an analog electrical signal to be processed.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the stirring rod position detection data processing method according to any one of claims 1 to 5 are implemented.

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