Pole piece non-contact type electromagnetic vibration reduction system and pole piece vibration reduction method thereof

Abstract

The invention relates to a pole piece non-contact type electromagnetic vibration reduction system and a pole piece vibration reduction method thereof. The pole piece non-contact type electromagnetic vibration reduction system comprises a vibration reduction device, the vibration damping device comprises at least two vibration damping mechanisms, a tape passing channel for pole pieces to pass through is formed between the at least two vibration damping mechanisms, and the vibration damping mechanisms are used for forming a magnetic field in the tape passing channel. And therefore, the pole piece penetrating through the tape passing channel is subjected to electromagnetic force back to the vibration reduction mechanism when deviating towards the direction of the vibration reduction mechanism. The pole piece vibration reduction method comprises the following steps that a pole piece penetrates through a tape passing channel, and the two opposite faces of the pole piece face at least one vibration reduction mechanism; the damping mechanism applies a magnetic field to the tape conveying channel; when the pole piece deviates towards the direction of one of the vibration reduction mechanisms, the pole piece is subjected to electromagnetic force opposite to the vibration direction. According to the scheme provided by the invention, the vibration of the pole piece can be effectively reduced on the premise that the pole piece is not contacted, and the coating of the pole piece is prevented from being damaged.

Description

Technical Field

[0001] The present application relates to the field of battery production technology, and in particular to a pole piece non-contact electromagnetic vibration reduction system and a pole piece vibration reduction method thereof. Background Art

[0002] During the processing of the pole piece, a roller assembly is usually required to drive the pole piece for transmission. During the transmission process, the pole piece will inevitably vibrate due to some external factors, especially when the pole piece is transmitted at high speed, the vibration will be more severe.

[0003] In the related technology, the electrode will vibrate due to uneven airflow disturbance during the drying process in the oven. The traditional vibration reduction method is often to add a vibration-damping floating roller before entering the oven, and add an air uniformity plate in the oven air nozzle to improve the uniformity of the air outlet. However, the vibration-damping floating roller is prone to the risk of wet electrode material sticking to the roller, and the air uniformity plate also has the problem of poor air outlet consistency, resulting in the risk of the electrode still having a large vibration. Summary of the Invention

[0004] In order to solve or partially solve the problems existing in the related art, the present application provides a pole piece non-contact electromagnetic vibration reduction system and a pole piece vibration reduction method thereof, which can effectively reduce the vibration of the pole piece without contacting the pole piece and avoid damage to the pole piece coating.

[0005] In a first aspect, the present application provides a pole piece non-contact electromagnetic vibration reduction system, which includes a vibration reduction device; the vibration reduction device includes at least two vibration reduction mechanisms, and a tape channel for passing the pole piece is formed between the at least two vibration reduction mechanisms. The vibration reduction mechanism is used to form a magnetic field in the tape channel so that the pole piece passing through the tape channel is subjected to an electromagnetic force in the opposite direction of the vibration when it vibrates and deviates in the direction of the vibration reduction mechanism.

[0006] Furthermore, the vibration reduction mechanism includes an electromagnet and a control module, the electromagnet is used to form a magnetic field in the tape walking channel, and the control module is used to adjust the magnetic field strength of the tape walking channel.

[0007] Furthermore, there are a plurality of electromagnets, and the plurality of electromagnets are distributed in a Halbach array along the width direction of the pole piece.

[0008] Furthermore, the control module includes a signal acquisition unit, a signal control unit, and a power control unit; the signal acquisition unit is used to collect vibration information of the pole piece passing through the tape walkway, and the signal control unit generates a control quantity based on the vibration information of the pole piece and sends it to the power control unit. The power control unit adjusts the voltage and current frequency of the electromagnet based on the control quantity sent by the signal control unit, thereby adjusting the magnetic field strength formed by the tape walkway.

[0009] Furthermore, the signal acquisition unit includes an acceleration sensor and a laser displacement sensor, the acceleration sensor is used to collect the acceleration of the pole piece toward the vibration reduction mechanism, and the laser displacement sensor is used to collect the distance the pole piece moves toward the vibration reduction mechanism.

[0010] Furthermore, the pole piece non-contact electromagnetic vibration reduction system also includes a signal preprocessing module, which is communicatively connected to the signal acquisition unit and the signal control unit respectively, and is used to filter, amplify and normalize the vibration information collected by the signal acquisition unit and send the processed vibration information to the signal control unit.

[0011] Furthermore, in the two electromagnets symmetrical about the tape path, the current directions of the electromagnets whose polarization directions are perpendicular to the width direction of the pole piece are opposite, and the current directions of the electromagnets whose polarization directions are parallel to the width direction of the pole piece are the same.

[0012] Another aspect of the present application provides a pole piece vibration reduction method, which comprises the following steps: At least one vibration damping mechanism is arranged on both sides of the pole piece in the vibration direction, and the vibration damping mechanisms on both sides of the pole piece are symmetrically distributed about the pole piece to form a tape path at the pole piece. The pole piece is initially undisturbed and stationary in the middle of the tape path, so that the vibration damping mechanisms on both sides of the pole piece form a magnetic field in the tape path; When the pole piece is vibrated by external interference, the magnetic field is used to make the pole piece passing through the tape path receive an electromagnetic force in the opposite direction of the vibration when the vibration deflects.

[0013] Furthermore, after the vibration reduction mechanism applies a magnetic field to the tape walkway, the offset direction of the pole piece is monitored in real time. When the pole piece deviates to one side, the vibration reduction mechanism in the direction of the pole piece offset increases the magnetic field strength in the tape walkway to enhance the repulsive force on the pole piece. The vibration reduction mechanism in the opposite direction of the pole piece offset synchronously adjusts the magnetic field strength in the tape walkway to form an opposite resultant force on the pole piece, so that the pole piece is always subjected to a symmetrical force opposite to the displacement direction.

[0014] Furthermore, when the pole piece vibrates due to external interference, the vibration information of the pole piece is collected; the vibration reduction mechanism forms an RBF-PID control system based on the RBF neural network and the PID controller. The RBF neural network adjusts the parameters of the PID controller in real time according to the vibration information and calculates the control quantity. The vibration reduction mechanism adjusts the magnetic field strength in the tape transport channel in real time according to the control quantity.

[0015] The technical solution provided by the present application may include the following beneficial results: a magnetic field is formed in the tape walkway through the vibration damping mechanism, so that the pole piece passes through the tape walkway; when the pole piece vibrates, the magnetic field can generate eddy currents in the pole piece, and the eddy currents on the pole piece interact with the original magnetic field to generate electromagnetic damping on the pole piece; when the pole piece deviates in the direction of any vibration damping mechanism, it can be subjected to the electromagnetic force facing away from the vibration damping mechanism, thereby reducing the vibration amplitude and vibration speed of the pole piece, achieving the vibration reduction effect when the pole piece is transmitted, and the pole piece does not need to contact the vibration damping mechanism, which can effectively avoid the pole piece and the vibration damping mechanism from scratching, causing the pole piece coating to be damaged and the pole piece to be torn, significantly improving the coating quality of the pole piece, and is suitable for the precision coating of high-speed, ultra-thin pole pieces.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0018] Figure 1 Schematic diagram of the structure of the pole piece non-contact electromagnetic vibration reduction system shown in an embodiment of the present application; Figure 2 is a schematic diagram of a pole piece in a magnetic field shown in an embodiment of the present application; Figure 3 Schematic diagram of the structure of the electromagnet using the Halbach array shown in the embodiment of the present application; Figure 4 is a plan view of an electromagnet using a Halbach array as shown in an embodiment of the present application; Figure 5 It is a flow chart of the pole piece vibration reduction method shown in an embodiment of the present application.

[0019] Reference numerals: vibration damping device 1; electromagnet 2; coil 3; pole piece 4. DETAILED DESCRIPTION

[0020] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0021] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0023] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," and the like should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0024] In the related art, the electrode vibrates during the oven drying process due to uneven airflow disturbances. The traditional vibration reduction method is often to add a vibration-damping floating roller before entering the oven and add an air uniformity plate inside the oven nozzle to improve the uniformity of the air outlet. However, the vibration-damping floating roller is prone to the risk of wet electrode material sticking to the roller, and the air uniformity plate also has the problem of poor air outlet consistency, resulting in the risk of the electrode still vibrating significantly. To address the above problems, the embodiments of the present application provide a non-contact electromagnetic vibration reduction system for electrode pieces and a method for reducing vibration of the electrode pieces, which can effectively reduce the vibration of the electrode pieces without contacting the electrode pieces, thereby preventing damage to the electrode coating.

[0025] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0026] See also Figure 1 and Figure 2The pole piece non-contact electromagnetic vibration reduction system includes a vibration reduction device 1. The vibration reduction device 1 includes at least two vibration reduction mechanisms, wherein at least two vibration reduction mechanisms are arranged opposite to each other. A tape channel for passing the pole piece 4 is formed between the two oppositely arranged vibration reduction mechanisms. The tape channel is located between the two vibration reduction mechanisms, and the vibration reduction mechanisms are used to form a magnetic field in the tape channel. Taking the case where the pole piece 4 is parallel to the horizontal plane during transmission as an example, at least one vibration reduction mechanism is located above the pole piece 4, and at least one vibration reduction mechanism is located below the pole piece 4. In some embodiments, there are two vibration damping mechanisms, which are arranged opposite to each other, and one vibration damping mechanism is located above the other vibration damping mechanism; in some embodiments, there are multiple vibration damping mechanisms, wherein there may be only one vibration damping mechanism below the pole piece 4 and multiple vibration damping mechanisms above the pole piece 4, or there may be multiple vibration damping mechanisms below the pole piece 4 and only one vibration damping mechanism above the pole piece 4; in some embodiments, there are multiple vibration damping mechanisms, wherein there are multiple vibration damping mechanisms above the pole piece 4 and multiple vibration damping mechanisms below the pole piece 4. Preferably, the number of vibration damping mechanisms above the pole piece 4 is the same as the number of vibration damping mechanisms below the pole piece 4, and the position of the vibration damping mechanism above the pole piece 4 corresponds one-to-one to the position of the vibration damping mechanism below the pole piece 4, so that the magnetic field distribution in the aisle channel is more uniform.

[0027] Since the vibration damping mechanism can form a magnetic field in the tape channel, when the pole piece 4 passes through the tape channel, the pole piece 4 in the tape channel will be in the magnetic field. When the pole piece 4 deviates in the direction of the vibration damping mechanism, the pole piece 4 generates induced eddy currents due to cutting the magnetic flux lines. Taking the vibration damping mechanism as an example, when the pole piece 4 vibrates and deviates along the Z axis, the pole piece 4 generates induced eddy currents due to cutting the magnetic flux lines in the X and Y directions. The eddy currents on the pole piece 4 interact with the original magnetic field to generate electromagnetic damping on the pole piece 4, that is, the induced eddy currents always hinder the relative movement of the pole piece 4 in the magnetic field. The electromagnetic damping forms an electromagnetic force on the pole piece 4, and the direction of the electromagnetic force is opposite to the deflection direction of the pole piece 4. The electromagnetic force is the eddy current damping force, which suppresses the vibration of the pole piece 4. Among them, the eddy current damping force is proportional to the vibration velocity of the pole piece 4 (F∝v). The vibration damping mechanism can effectively suppress the vibration of the pole piece from 0 to 200 Hz. The use scenarios of the pole piece non-contact electromagnetic vibration reduction system are not limited to the pole piece 4 transmission area in the oven. The pole piece non-contact electromagnetic vibration reduction system can also be flexibly used in other high-incidence areas of the pole piece 4 of the entire line, such as the front and rear areas where the die head coats the pole piece 4, the area where the pole piece 4 enters the oven, the area where the pole piece 4 exits the oven, the long-distance span transmission area of ​​the pole piece 4 on the transmission roller, the dynamic balance failure area of ​​the pole piece 4 on the roller, the start and stop stages of the unwinding of the pole piece 4, and the start and stop stages of the winding of the pole piece 4.

[0028] The present application forms a magnetic field in the tape walkway through the vibration damping mechanism, so that the pole piece 4 passes through the tape walkway. When the pole piece 4 vibrates, the magnetic field can generate eddy currents in the pole piece 4. The eddy currents on the pole piece 4 interact with the original magnetic field to generate electromagnetic damping on the pole piece 4. When the pole piece 4 deviates in the direction of any vibration damping mechanism, it can be subjected to the electromagnetic force back to the vibration damping mechanism, thereby reducing the vibration amplitude and vibration speed of the pole piece 4, and achieving the vibration reduction effect when the pole piece 4 is transmitted. Moreover, the pole piece 4 does not need to contact the vibration damping mechanism, which can effectively avoid the pole piece 4 and the vibration damping mechanism from scratching, causing the pole piece 4 coating to be damaged and the pole piece 4 to be torn, significantly improving the coating quality of the pole piece 4, and is suitable for high-speed, ultra-thin precision coating of the pole piece 4.

[0029] See also Figure 1 The vibration damping mechanism includes an electromagnet 2 and a control module. The electromagnet 2 includes an iron core and multiple coils 3 wound around the core. The control module is used to adjust the magnetic field strength of the tape path. The control module can control the voltage and current frequency of the coils 3, thereby changing the magnetic field strength generated by the electromagnet 2 in the tape path.

[0030] See also Figure 3 and Figure 4 In some embodiments, there are multiple electromagnets 2, and the multiple electromagnets 2 are distributed in a Halbach array along the width direction of the pole piece 4. By arranging the multiple electromagnets 2 in the form of a Halbach array, specifically, in the Halbach array, among two adjacent electromagnets 2, the magnetization direction of one electromagnet 2 is rotated 90° relative to the magnetization direction of the other electromagnet 2. With this design, the magnetic field can be significantly enhanced on the side close to the tape channel and greatly weakened on the side facing away from the tape channel through vector superposition, so that most magnetic lines of force can be concentrated on the tape channel, thereby enhancing the magnetic field of the tape channel, improving the electromagnetic vibration reduction effect, enhancing the continuity of the tangential magnetic field in the width direction of the pole piece 4, and effectively reducing the amount of magnetic leakage of the vibration reduction device, thereby significantly improving the magnetic field utilization rate.

[0031] See also Figure 3 and Figure 4When multiple electromagnets 2 are arranged in a Halbach array, the current directions of the two electromagnets 2 symmetrical about the tape path are opposite, while the current directions of the electromagnets 2 with polarization directions perpendicular to the width of the pole piece 4 are the same. Specifically, taking the example of multiple electromagnets 2 distributed on the upper and lower sides of the pole piece 4, the current directions of the two electromagnets 2 symmetrical about the tape path and with polarization directions perpendicular to the width of the pole piece 4 are opposite, while the current directions of the two electromagnets 2 symmetrical about the tape path and with polarization directions horizontal are the same. The magnetic field generated by the vibration damping mechanism on one side of the pole piece 4 in the tape path is opposite in direction to the magnetic field generated by the vibration damping mechanism on the other side of the pole piece 4 in the tape path. When the pole piece 4 deviates toward the vibration damping mechanism on one side, the voltage and / or current frequency connected to the vibration damping mechanism in the direction of the pole piece 4's deviation can be increased, thereby actively applying a greater electromagnetic force to the pole piece 4 and hindering the pole piece 4 from deviating toward the vibration damping mechanism, thereby reducing the vibration amplitude and vibration speed of the pole piece 4.

[0032] The control module includes a signal acquisition unit, a signal control unit, and a power control unit. The signal acquisition unit is used to collect vibration information of the pole piece 4 passing through the tape path, where the vibration information includes at least the vibration acceleration and vibration amplitude of the pole piece 4, that is, the acceleration of the pole piece 4 in the direction of the vibration mechanism and the displacement of the pole piece 4 in the direction of the vibration mechanism; the signal control unit can receive the vibration information of the pole piece 4 collected by the signal acquisition module, and the signal control unit generates a control variable based on the vibration information of the pole piece 4. The control module can send the control variable to the power control unit. The power control unit adjusts the voltage and current frequency of the electromagnet 2 based on the control variable sent by the signal control unit, thereby adjusting the magnetic field strength formed by the tape path. When the signal acquisition unit collects the vibration information of the pole piece 4, after the signal control unit receives the vibration information, the signal control unit can compare the various values ​​in the vibration information with the preset target range. If the value of the vibration information exceeds the preset target range, the signal control unit will generate a control amount and send the control amount to the power control unit. After receiving the control amount, the power control unit adjusts the voltage and current frequency of the electromagnet 2, thereby adjusting the magnetic field strength of the tape channel, so that the pole piece 4 passing through the tape channel is subjected to an electromagnetic force opposite to the offset direction, which becomes larger until the various values ​​in the vibration information of the pole piece 4 return to the preset target range, thereby forming a closed loop of disturbance detection-force control compensation; wherein the preset range can be adaptively adjusted according to the processing area of ​​the pole piece 4, for example, in the drying area in the oven, the front and rear areas where the die head coats the pole piece 4, the area where the pole piece 4 enters the oven, the area where the pole piece 4 exits the oven, the long-distance span transmission area of ​​the pole piece 4 on the drive roller, the dynamic balance failure area of ​​the pole piece 4 on the roller, the start and stop stages of the unwinding of the pole piece 4, and the start and stop stages of the winding of the pole piece 4 can all adjust the appropriate preset target range according to actual conditions. Preferably, the signal control unit forms an RBF-PID control system based on an RBF (radial basis function) neural network and a PID (proportional-integral-differential) controller. The RBF neural network can adjust the parameters of the PID controller in real time according to the vibration information of the pole piece 4 and calculate the control quantity, and then send the control quantity to the power control unit. The power control unit controls the magnetic field intensity generated by the vibration reduction mechanism according to the control quantity. The signal control unit learns the nonlinear characteristics of the vibration of the pole piece 4 in real time through RBF, dynamically optimizes the PID parameters, and realizes precise adaptive adjustment of the damping force. Even if the coating speed of the pole piece 4 changes suddenly, such as from 60m / min to 80m / min, the vibration amplitude can be quickly stabilized again.

[0033] The signal acquisition module includes an acceleration sensor and a laser displacement sensor. The acceleration sensor is used to collect the acceleration of the pole piece 4 toward the vibration reduction device 1 , and the laser displacement sensor is used to collect the distance the pole piece 4 moves toward the vibration reduction device 1 .

[0034] In some embodiments, after collecting the acceleration information of the pole piece 4 in the direction of the vibration reduction device 1, the acceleration sensor can send the data out. After the signal control unit receives the acceleration information of the pole piece 4, if it is determined that the acceleration of the pole piece 4 toward the upward vibration reduction mechanism is greater than the preset target range, a corresponding control amount can be generated and sent to the power control unit of the upper vibration reduction mechanism. The upper vibration reduction mechanism increases the intensity of the magnetic field generated on the tape walking channel, and the pole piece 4 is affected by the magnetic field to reduce the upward acceleration. The signal control unit can also choose to send a control amount to reduce the electromagnetic intensity to the power control unit of the vibration reduction mechanism below the pole piece 4 according to actual conditions, so that the vibration reduction mechanism below reduces the intensity of the magnetic field. The intensity of the magnetic field generated by the tape walkway is increased, thereby increasing the downward electromagnetic force effect on the pole piece 4; if the signal control unit determines that the acceleration of the pole piece 4 toward the downward vibration damping mechanism is greater than the preset target range, a corresponding control quantity is generated and sent to the power control unit of the vibration damping mechanism below, and the vibration damping mechanism below increases the intensity of the magnetic field generated on the tape walkway, and the pole piece 4 is affected by the magnetic field to reduce the downward acceleration, wherein the signal control unit can also choose to send a control quantity to reduce the electromagnetic intensity to the power control unit of the vibration damping mechanism above the pole piece 4 according to actual conditions, so that the upper vibration damping mechanism reduces the intensity of the magnetic field generated on the tape walkway, thereby increasing the upward electromagnetic force effect on the pole piece 4.

[0035] In some embodiments, after collecting the displacement distance of the pole piece 4 toward the vibration reduction device 1, the laser displacement sensor can send the data. After the signal control unit receives the displacement distance data of the pole piece 4, if it determines that the displacement distance of the pole piece 4 toward the upper vibration reduction mechanism is greater than the preset target range, a corresponding control amount can be generated and sent to the power control unit of the upper vibration reduction mechanism. The upper vibration reduction mechanism increases the intensity of the magnetic field generated on the tape walking channel, and the pole piece 4 is affected by the magnetic field to reduce the upward displacement distance. The signal control unit can also choose to send a control amount to reduce the electromagnetic intensity to the power control unit of the vibration reduction mechanism below the pole piece 4 according to actual conditions, so that the lower vibration reduction mechanism reduces the intensity of the magnetic field. The intensity of the magnetic field generated by the tape walkway is increased, thereby increasing the downward electromagnetic force effect on the pole piece 4; if the signal control unit determines that the displacement distance of the pole piece 4 toward the lower vibration damping mechanism is greater than the preset target range, a corresponding control quantity is generated and sent to the power control unit of the lower vibration damping mechanism, and the lower vibration damping mechanism increases the intensity of the magnetic field generated on the tape walkway, and the pole piece 4 is affected by the magnetic field to reduce the downward displacement distance, wherein the signal control unit can also choose to send a control quantity to reduce the electromagnetic intensity to the power control unit of the vibration damping mechanism above the pole piece 4 according to actual conditions, so that the upper vibration damping mechanism reduces the intensity of the magnetic field generated on the tape walkway, thereby increasing the upward electromagnetic force effect on the pole piece 4.

[0036] The power control unit is used to supply power to the electromagnet 2. The power control unit passes current to multiple coils 3. According to Ampere's law, the current passing through the coils 3 will generate a magnetic field, and the iron core will further enhance this magnetic field, thereby forming a controllable magnetic field at both ends of the electromagnet 2; the signal control unit sends a control quantity to the power control unit to enable the power control unit to adjust the voltage and current frequency connected to the electromagnet 2. When the voltage and current frequency connected to the electromagnet 2 change, the magnetic field size in the tape channel will also change, and the electromagnetic force exerted on the pole piece 4 passing through the tape channel will also change, thereby achieving the vibration reduction effect of the vibration reduction mechanism on the pole piece 4.

[0037] In some embodiments, the current passed through the coil 3 can be direct current. When the pole piece 4 vibrates in the tape channel, the pole piece 4 will deviate toward the vibration damping mechanism. The pole piece 4 cuts the magnetic flux lines of the magnetic field in the tape channel. The pole piece 4 is affected by electromagnetic damping and passively generates an electromagnetic force in the opposite direction of the deviation, thereby reducing the distance that the pole piece 4 deviates toward the vibration damping mechanism and reducing the speed at which the pole piece 4 deviates toward the vibration damping mechanism, thereby achieving the vibration reduction effect.

[0038] In some embodiments, the current passed through the coil 3 can be alternating current. When the pole piece 4 vibrates in the tape path, the signal acquisition unit collects vibration information related to the pole piece 4, the signal control unit obtains the vibration information of the pole piece 4 and analyzes and processes the vibration information. The signal control unit generates a control quantity and sends it to the corresponding power control unit. The vibration reduction mechanism in the offset direction of the pole piece 4 actively adjusts the intensity of the generated magnetic field, thereby generating an electromagnetic force in the opposite offset direction on the pole piece 4, which obstructs the pole piece 4 and reduces the vibration amplitude and vibration speed. Preferably, there are multiple vibration reduction mechanisms, and there are at least two or more vibration reduction mechanisms on each of the opposite sides of the pole piece 4. The vibration reduction mechanisms on the same side are arranged side by side, and the signal acquisition unit can collect vibration information of multiple parts in the width direction of the pole piece 4. The signal acquisition unit then sends the collected vibration information of multiple parts to the corresponding vibration reduction mechanism. The signal control unit of each vibration reduction mechanism generates a control amount according to the corresponding vibration information, and then sends the control amount to the corresponding power control unit. Each vibration reduction mechanism adjusts the corresponding magnetic field strength according to the control amount, so that even if the vibration amplitudes and / or vibration accelerations of multiple parts in the width direction of the pole piece 4 are different, the corresponding vibration reduction effect can be obtained, thereby realizing the vibration reduction effect of the pole piece 4 in the multi-physical layer coupling scenario.

[0039] In some embodiments, the pole piece non-contact electromagnetic vibration reduction system further includes a signal preprocessing unit, which is communicatively connected to the signal acquisition unit and the signal control unit respectively, and the signal preprocessing unit is used to filter, amplify and normalize the vibration information collected by the signal acquisition unit and send the processed vibration information to the signal control unit; wherein the filtering step of the signal preprocessing unit can remove high-frequency noise in the vibration information, the amplification step of the signal preprocessing unit can enhance the intensity of the vibration information, and the normalization step of the signal preprocessing unit can convert the vibration information to a suitable range to facilitate subsequent control algorithm processing of the signal control unit. Since the vibration signals collected by the signal acquisition unit may contain noise and interference, the signal preprocessing unit reduces the noise and interference in the vibration signals by processing these vibration signals, thereby improving the quality of the vibration signals collected by the signal acquisition unit.

[0040] Corresponding to the aforementioned embodiment of the application function implementation device, the present application also provides a pole piece vibration reduction method and corresponding embodiments.

[0041] See also Figure 1 and Figure 5 The pole piece vibration reduction method uses a pole piece non-contact electromagnetic vibration reduction system. The pole piece vibration reduction method includes the following steps: S01. Arrange at least one vibration damping mechanism on both sides of the pole piece's vibration direction, and distribute the vibration damping mechanisms on both sides of the pole piece symmetrically about the pole piece to form a tape channel at the pole piece. The pole piece in the initial state is undisturbed and stationary in the middle of the tape channel, so that the vibration damping mechanisms on both sides of the pole piece form a magnetic field in the tape channel.

[0042] Specifically, according to the needs of the scenarios where the vibration of the pole piece 4 is reduced, such as in the baking area of ​​the oven, the front and rear areas where the die head coats the pole piece 4, the area where the pole piece 4 enters the oven, the area where the pole piece 4 exits the oven, the long-distance span transmission area of ​​the pole piece 4 on the drive roller, the dynamic balance failure area of ​​the pole piece 4 on the roller, the start and stop stage of the unwinding of the pole piece 4 or the start and stop stage of the rewinding of the pole piece 4, at least one vibration reduction mechanism is arranged on both sides of the vibration direction of the pole piece, and at least two of the vibration reduction mechanisms are arranged facing each other, and the vibration reduction mechanisms on both sides of the pole piece 4 are symmetrically distributed about the pole piece, thereby forming a tape channel at the pole piece 4; the horizontality of each vibration reduction mechanism is adjusted so that the vibration reduction mechanisms on opposite sides of the tape channel are parallel to each other; the parameters of the pole piece non-contact electromagnetic vibration reduction system are initialized, and the preset target range is input; the pole piece is stationary in the middle of the tape channel in the initial state, and the pole piece is not disturbed at this time, so that the vibration reduction mechanisms on both sides of the pole piece are energized, and the vibration reduction mechanisms on opposite sides of the pole piece 4 form a magnetic field on the tape channel.

[0043] S02. When the pole piece is vibrated by external interference, the magnetic field is used to make the pole piece passing through the tape path receive an electromagnetic force in the opposite direction of the vibration when the pole piece is deflected by the vibration.

[0044] Specifically, the driving mechanism is used to pull the pole piece 4 to make the pole piece 4 transmit. When the pole piece 4 is vibrated by external interference, the pole piece 4 will deviate in the direction of the vibration reduction mechanism. At this time, the pole piece 4 generates induced eddy currents due to cutting the magnetic lines of force. The eddy currents on the pole piece 4 interact with the original magnetic field to generate electromagnetic damping on the pole piece 4. The electromagnetic damping causes the pole piece 4 to generate an eddy current damping force opposite to the offset direction of the pole piece 4. The eddy current damping force prevents the pole piece 4 from deviating in the direction of the vibration reduction mechanism, thereby suppressing the vibration of the pole piece 4.

[0045] The pole piece vibration reduction method forms a magnetic field in the tape walkway through the vibration reduction mechanism, so that the pole piece 4 passes through the tape walkway. When the pole piece 4 vibrates, the eddy current on the pole piece 4 interacts with the original magnetic field to generate electromagnetic damping on the pole piece 4. When the pole piece 4 deviates in the direction of any vibration reduction mechanism, it can be subjected to the electromagnetic force opposite to the vibration reduction mechanism, thereby reducing the vibration amplitude and vibration speed of the pole piece 4, and achieving the vibration reduction effect when the pole piece 4 is transmitted. Moreover, the pole piece 4 does not need to contact the vibration reduction mechanism, which can effectively avoid the scratching of the pole piece 4 and the vibration reduction mechanism, causing the damage of the pole piece 4 coating and the tearing of the pole piece 4, significantly improving the coating quality of the pole piece 4, and is suitable for the precision coating of high-speed, ultra-thin pole pieces 4.

[0046] In some embodiments, after the vibration damping mechanism applies a magnetic field to the tape walkway, when the pole piece 4 starts to transmit, the offset direction of the pole piece 4 is monitored in real time using a signal acquisition unit. When the pole piece 4 deviates to one side, the vibration damping mechanism in the offset direction of the pole piece 4 increases the magnetic field strength in the tape walkway, thereby enhancing the repulsive force on the pole piece 4. The vibration damping mechanism in the opposite direction of the offset of the pole piece 4 synchronously adjusts the magnetic field strength in the tape walkway, thereby forming a reverse resultant force on the pole piece, so that the pole piece 4 is always subjected to a symmetrical force opposite to the displacement direction, thereby offsetting the vibration of the pole piece 4 and maintaining the stability of the spatial position of the pole piece 4. Specifically, an acceleration sensor is used to collect the acceleration of the pole piece 4 in the direction of the vibration reduction device 1, and a laser displacement sensor is used to collect the distance the pole piece 4 moves toward the vibration reduction device 1. The acceleration sensor and the laser displacement sensor send the collected vibration information to the signal preprocessing unit, and the signal preprocessing unit filters, amplifies and normalizes the vibration information collected by the signal collection unit and sends the processed vibration information to the signal control unit; taking the vibration mechanism as an example of an up and down distribution, when the pole piece 4 vibrates upward and exceeds the preset target range, the vibration reduction mechanism located above the pole piece 4 increases the magnetic field strength in the tape path, thereby enhancing In response to the downward electromagnetic force on the pole piece 4, the vibration damping mechanism in the opposite direction of the pole piece 4 offset synchronously reduces the magnetic field strength in the tape walkway, thereby forming a reverse resultant force on the pole piece 4, which blocks the pole piece 4 until the vibration amplitude and acceleration return to the target range; when the pole piece 4 vibrates downward and exceeds the preset target range, the vibration damping mechanism below the pole piece 4 increases the magnetic field strength in the tape walkway, thereby enhancing the upward electromagnetic force on the pole piece 4, and the vibration damping mechanism in the opposite direction of the pole piece 4 offset synchronously reduces the magnetic field strength in the tape walkway, thereby forming a reverse resultant force on the pole piece 4, which blocks the pole piece 4 until the vibration amplitude and acceleration return to the target range.

[0047] In some embodiments, when the pole piece vibrates due to external interference, the signal acquisition unit collects the pole piece vibration information. The signal control unit forms an RBF-PID control system based on an RBF neural network and a PID controller. The RBF neural network can adjust the parameters of the PID controller in real time based on the vibration information and calculate the control variable. The PID controller then sends the control variable to the power control unit. The power control unit receives the control variable from the signal control unit and adjusts the voltage and current frequency of the electromagnet 2 in real time, thereby adjusting the magnetic field strength formed by the tape path. The pole piece 4 is subjected to the electromagnetic force, and the amplitude gradually decreases. At this time, the signal control unit dynamically adjusts the magnetic field strength of the tape path along with the amplitude. During this process, the control module records various parameters of the adjustment process as a training set for the RBF neural network calculation model to optimize the calculation model. The RBF neural network can identify the nonlinear characteristics of the electromagnetic force in real time and dynamically optimize the PID parameters, thus solving the problem of insufficient compensation of the nonlinear relationship of current by traditional PID.

[0048] In some embodiments, the vertical projection of the vibration reduction mechanism on the pole piece 4 covers both ends of the pole piece 4 in the width direction. Figure 1 or Figure 3 For example, that is, the left end of the pole piece 4 in the width direction does not exceed the leftmost end of the vibration damping mechanism, and the right end of the pole piece 4 in the width direction does not exceed the rightmost end of the vibration damping mechanism. Preferably, the left end of the pole piece 4 in the width direction does not exceed the leftmost end of the electromagnet 2, and the right end of the pole piece 4 in the width direction does not exceed the rightmost end of the electromagnet 2, thereby ensuring that the entire pole piece 4 can be affected by the magnetic field. The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different emphases. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily required for this application. In addition, it can be understood that the steps in the method of the embodiment of the present application can be adjusted in sequence, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0049] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A pole piece non-contact electromagnetic vibration reduction system, characterized in that: include: A vibration damping device, wherein the vibration damping device includes at least two vibration damping mechanisms, and a tape channel for passing the pole piece is formed between the at least two vibration damping mechanisms. The vibration damping mechanism is used to form a magnetic field in the tape channel so that the pole piece passing through the tape channel is subjected to an electromagnetic force in the opposite direction of the vibration when it vibrates and deviates in the direction of the vibration damping mechanism.

2. The pole piece non-contact electromagnetic vibration reduction system according to claim 1, characterized in that: The vibration reduction mechanism includes an electromagnet and a control module. The electromagnet is used to form a magnetic field in the tape path, and the control module is used to adjust the intensity of the magnetic field in the tape path.

3. The pole piece non-contact electromagnetic vibration reduction system according to claim 2, characterized in that: There are multiple electromagnets, and the multiple electromagnets are distributed in a Halbach array along the width direction of the pole piece.

4. The pole piece non-contact electromagnetic vibration reduction system according to claim 2, characterized in that: The control module includes a signal acquisition unit, a signal control unit, and a power control unit; the signal acquisition unit is used to collect vibration information of the pole piece passing through the tape walkway, and the signal control unit generates a control quantity based on the vibration information of the pole piece and sends it to the power control unit. The power control unit adjusts the voltage and current frequency of the electromagnet based on the control quantity sent by the signal control unit, thereby adjusting the magnetic field strength formed by the tape walkway.

5. The pole piece non-contact electromagnetic vibration reduction system according to claim 4, characterized in that: The signal acquisition unit includes an acceleration sensor and a laser displacement sensor. The acceleration sensor is used to collect the acceleration of the pole piece toward the vibration reduction mechanism, and the laser displacement sensor is used to collect the distance the pole piece moves toward the vibration reduction mechanism.

6. The pole piece non-contact electromagnetic vibration reduction system according to claim 2, characterized in that: It also includes a signal preprocessing unit, which is communicatively connected to the signal acquisition unit and the signal control unit respectively. The signal preprocessing unit is used to filter, amplify and normalize the vibration information collected by the signal acquisition unit and send the processed vibration information to the signal control unit.

7. The pole piece non-contact electromagnetic vibration reduction system according to claim 3, characterized in that: In the two electromagnets symmetrical about the tape path, the current directions of the electromagnets whose polarization directions are perpendicular to the width direction of the pole piece are opposite, and the current directions of the electromagnets whose polarization directions are parallel to the width direction of the pole piece are the same.

8. A pole piece vibration reduction method, using the pole piece non-contact electromagnetic vibration reduction system according to any one of claims 1 to 7, characterized in that: The following steps are involved: At least one vibration damping mechanism is arranged on both sides of the pole piece in the vibration direction, and the vibration damping mechanisms on both sides of the pole piece are symmetrically distributed about the pole piece to form a tape path at the pole piece. The pole piece is initially undisturbed and stationary in the middle of the tape path, so that the vibration damping mechanisms on both sides of the pole piece form a magnetic field in the tape path; When the pole piece is vibrated by external interference, the magnetic field is used to make the pole piece passing through the tape path receive an electromagnetic force in the opposite direction of the vibration when the vibration deflects.

9. The pole piece vibration reduction method according to claim 8, characterized in that: After the vibration reduction mechanism applies a magnetic field to the tape walkway, the offset direction of the pole piece is monitored in real time. When the pole piece deviates to one side, the vibration reduction mechanism in the direction of the pole piece offset increases the magnetic field strength in the tape walkway to enhance the repulsive force on the pole piece. The vibration reduction mechanism in the opposite direction of the pole piece offset synchronously adjusts the magnetic field strength in the tape walkway to form an opposite resultant force on the pole piece, so that the pole piece is always subjected to a symmetrical force opposite to the displacement direction.

10. The pole piece vibration reduction method according to claim 8, wherein: When the pole piece vibrates due to external interference, the vibration information of the pole piece is collected; the vibration reduction mechanism forms an RBF-PID control system based on the RBF neural network and the PID controller. The RBF neural network adjusts the parameters of the PID controller in real time according to the vibration information and calculates the control quantity. The vibration reduction mechanism adjusts the magnetic field strength in the tape transport channel in real time according to the control quantity.

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