A spherical global programmable magnetic field generation system based on odd-even alternate winding and a regulation method thereof

Abstract

The application discloses a kind of based on odd-even alternately winding spherical global programmable magnetic field generation system and regulation and control method, it is related to magneto-optical computing and precision electromagnetic control field.The system includes spherical magneto-optical medium, multi-layer coil array and drive control system.Coil array uses the alternately winding structure of odd layer clockwise, even layer counterclockwise, utilizes the magnetic field vector superposition characteristics generated by positive and negative winding, effectively offsets radial residual magnetic field, realizes the magnetic field homogeneity of sphere center area ≥99%.Drive control system is based on FPGA master control unit and multichannel independent current source, by adjusting the current amplitude, frequency and phase difference of each layer coil, it is synergistically regulated and controlled in spatial three-dimensional vector and time / phase dimension, and any form of gradient magnetic field is synthesized.The application breaks through the two-dimensional geometric constraint of traditional plane micro-ring technology, significantly reduces optical signal transmission loss and polarization crosstalk, realizes the continuous reconstruction and dynamic shaping of three-dimensional space optical path, and is suitable for high-precision magneto-optical regulation and control and high-dimensional optical computing scene.

Description

Technical Field

[0001] This invention relates to the fields of magneto-optical computing and precision electromagnetic control, specifically to a spherical programmable magnetic field generation system and its control method for dynamically reconstructing three-dimensional optical paths. Background Technology

[0002] With the rapid development of optical computing technology, higher requirements are being placed on the dimensionality and precision of optical path control. In existing technologies, magneto-optical control mostly adopts planar micro-ring resonator structures, which are limited by two-dimensional planar geometry and can only achieve discrete wavelength selection or phase modulation. They cannot achieve continuous reconstruction and dynamic shaping of the optical path morphology in three-dimensional space.

[0003] Furthermore, traditional electromagnetic coils often employ a unidirectional, uniform winding process, resulting in a large radial residual magnetic field component in the central region of the sphere or cylinder, leading to low magnetic field uniformity. This non-ideal magnetic field distribution introduces additional polarization crosstalk and phase noise, making it difficult to meet the stringent requirements of high-precision, low-loss optical computing systems. Therefore, there is an urgent need for a magnetic field generation scheme that can overcome the limitations of planar dimensions, achieve a highly uniform three-dimensional magnetic field environment, and support dynamic flexibility. Summary of the Invention

[0004] The purpose of this invention is to provide a spherical global programmable magnetic field generation system and control method based on alternating odd and even winding, so as to solve the problems of difficulty in three-dimensional optical path reconstruction and low magnetic field uniformity in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A spherical, globally programmable magnetic field generation system based on alternating odd and even winding includes a spherical magneto-optical medium, a multilayer coil array, and a drive control system. The coil array employs an alternating winding structure with odd-numbered layers wound clockwise and even-numbered layers wound counterclockwise. The drive control system includes an FPGA main control unit and multiple independent current sources. By adjusting the current amplitude and phase difference of each layer of coils, a target gradient magnetic field is synthesized within the spherical medium.

[0006] The core innovations of this invention are reflected in the following four aspects: Structural Innovation: A spherical adapter frame wound with multiple layers of enameled wire is adopted, implementing an alternating winding rule of "odd layers clockwise and even layers counterclockwise". Utilizing the vector superposition characteristics of the magnetic fields generated by the forward and reverse winding, the radial residual magnetic field is effectively canceled, achieving a high-precision basic field with a magnetic field uniformity of ≥99% in the central region of the sphere.

[0007] Innovative Control: Introducing the concept of "four-dimensional programmable" control. The "four dimensions" in this invention are explicitly defined as: a three-dimensional spatial vector (X / Y / Z axis magnetic field components) + a time / phase dimension. Through an FPGA main control unit and multi-channel independent current sources, the current amplitude, frequency, and phase difference of each layer of coils are adjusted in real time to synthesize gradient magnetic fields of arbitrary shapes, achieving dynamic reconstruction of the optical path.

[0008] Technological innovation: Precision winding is performed under a constant micro-tension of 0.045~0.055N, combined with a high-temperature resistant insulating film of 0.01~0.03mm, to ensure the consistency of turn spacing and the reliability of interlayer insulation, thereby achieving microsecond-level rapid switching of magnetic field mode and long-term stability.

[0009] Innovative Physical Mechanism: Traditional motors or transformers often use odd-even windings in cylindrical or stator slot structures to eliminate higher harmonics and improve power. This invention creatively transfers this to a spherical frame, fundamentally changing the physical mechanism: within the spherical space, the alternating clockwise winding of odd-numbered layers and counter-clockwise winding of even-numbered layers causes the radial residual magnetic field components generated by adjacent layers to cancel each other out in the central region of the sphere, retaining only the effective axial and tangential control components. This "spherical vector cancellation model" is the core physical basis for achieving a global magnetic field uniformity of ≥99% within the sphere, something that cannot be achieved by any planar micro-ring structure or traditional cylindrical solenoid. Beneficial effects

[0010] Breaking through dimensional limitations: It completely avoids the two-dimensional geometric constraints of planar micro-ring technology, realizes continuous reconstruction and dynamic shaping of three-dimensional spatial optical paths, and provides a hardware foundation for high-dimensional optical computing.

[0011] Improved magnetic field quality: The alternating odd and even winding structure significantly cancels out the radial residual magnetic field, increasing the uniformity of the central region to over 99%, effectively reducing optical signal transmission loss and polarization crosstalk.

[0012] Enhanced control flexibility: The four-dimensional programmable control mechanism gives the system a high degree of freedom, supports rapid switching of various complex optical path configurations such as straight waveguides, ring waveguides, and spiral waveguides, with a response time of ≤1ms, meeting the needs of real-time optical computing. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the overall structure of the spherical magneto-optical thin film preparation system of the present invention. This system is used to prepare spherical magneto-optical thin films with both high Verdet constant and high adhesion. The system includes an FPGA main control unit, a spherical magneto-optical medium, a multilayer coil array, a multi-channel independent current source, and a magnetic field monitoring module (Hall sensor array). The FPGA main control unit outputs control signals to the multi-channel independent current source to drive the multilayer coil array to form a target gradient magnetic field around the spherical magneto-optical medium. The magnetic field monitoring module collects the magnetic field data inside the spherical magneto-optical medium, generates a magnetic field feedback signal, and sends it back to the FPGA main control unit to complete the real-time closed-loop correction of the magnetic field.

[0014] Figure 2 This is a schematic diagram of the cross-section of the odd-even alternating wound coil of the present invention; the coil is composed of multiple layers of oxygen-free copper enameled wire arranged in layers, with odd-numbered layers wound clockwise and even-numbered layers wound counterclockwise, with an interlayer insulating film set between adjacent layers, and a standard turn spacing maintained between each turn; the radial residual magnetic field is offset by the forward and reverse layered winding, forming a pure and effective magnetic field in the central region of the coil; the attached diagram in the upper right corner is a simplified comparative schematic diagram of the coil current winding direction.

[0015] Figure 3 This is a flowchart of the closed-loop control logic for the optical path and gradient magnetic field of the present invention. After the target optical path morphology signal is input, it completes spatial ratio calculation, time and frequency adjustment, intensity grading and phase difference adjustment calculations through three parallel parameter adjustment branches. The three adjustment parameters are uniformly sent to the FPGA main control unit. The FPGA outputs control signals to drive a multi-spherical global DC source to generate a gradient magnetic field. The magnetic field operating status is collected in real time by the magnetic field monitoring feedback closed-loop correction module, and the monitoring signal is fed back to the input of the FPGA main control unit, forming a two-layer real-time closed-loop correction loop of optical path-magnetic field. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Hardware Components This system mainly includes the following core components: Magneto-optical medium: Ce:YIG (cerium-doped yttrium iron garnet) single crystal spheres are used as the core carrier for the Faraday rotation effect.

[0018] Coil array: spherical adapter coils wound with 14-18 layers of oxygen-free copper enameled wire, with high-temperature resistant insulating film filling the interlayer.

[0019] Drive control system: The main control unit is based on FPGA and integrates multi-channel high-precision independent current sources, which are responsible for the real-time calculation and output of four-dimensional parameters.

[0020] Magnetic field monitoring module: Built-in Hall sensor array for real-time feedback of magnetic field distribution in the central area, supporting closed-loop correction.

[0021] Winding process The coil winding employs an alternating odd-even method: odd-numbered layers are wound clockwise, and even-numbered layers are wound counterclockwise. During the winding process, the tension control system maintains a constant tension of approximately 0.05N (allowable range 0.045~0.055N). This tension value has been experimentally verified to effectively eliminate residual stress in the enameled wire and prevent coil deformation, making it a key process parameter for ensuring magnetic field uniformity. The thickness of the interlayer insulation film is controlled between 0.01~0.03mm, balancing insulation performance and space utilization.

[0022] Regulation logic The system employs a four-step control strategy: S1 Calibration: Establish an interlayer magnetic field cancellation model and calibrate the transfer function and radial residual component of each layer coil.

[0023] S2 Spatial Ratio: Based on the target's three-dimensional optical path shape, calculate the required magnetic field components along the X / Y / Z axes and match the spatial current ratio of each layer of coils.

[0024] S3 Dynamic Adjustment: Introducing a time / phase dimension, the magnetic field gradient is dynamically scanned and its shape switched by adjusting the current frequency and interlayer phase difference.

[0025] S4 Closed-loop correction: Based on feedback from the monitoring module, the four-dimensional parameters are corrected in real time to ensure the consistency of the magnetic field uniformity with the target optical path. Example

[0026] Based on actual measurements, the performance indicators of this system are as follows: The uniformity of the central magnetic field can reach 99.7%; the response delay is ≤1ms, supporting microsecond-level magnetic field mode switching; the insertion loss is ≤0.015dB, which is significantly better than the traditional planar microring structure.

[0027] Comparative experimental data To verify the inventiveness of this invention, a control group was set up: a conventional unidirectional uniformly wound (non-alternating odd and even) spherical coil was used, and tests were conducted under the same number of turns and current conditions. The results showed that the magnetic field uniformity at the center of the sphere in the control group was only 84.3%, and there was significant radial residual magnetic field interference, making smooth reconstruction of the entire optical path impossible. In contrast, the magnetic field uniformity of this invention reached 99.7%, and the optical path switching response time was ≤1ms. This comparative data confirms that the "alternating odd and even winding + spherical global control" produced unexpected technical effects.

Claims

1. A spherical, globally programmable magnetic field generation system based on alternating odd and even winding, characterized in that: It includes a spherical magneto-optical medium, a multilayer coil array, and a drive control system; the coil array adopts an alternating winding structure with odd-numbered layers clockwise and even-numbered layers counterclockwise; the drive control system includes an FPGA main control unit and multiple independent current sources, which synthesize a target gradient magnetic field in the spherical medium by adjusting the current amplitude and phase difference of each layer of coils.

2. The system according to claim 1, characterized in that: The coil winding tension is kept constant between 0.045 and 0.055 N; a high-temperature resistant insulating film with a thickness of 0.01 to 0.03 mm is set between the layers, with the optimal thickness being 0.03 mm.

3. The system according to claim 1, characterized in that: The drive control system achieves dynamic reconstruction of the magnetic field shape through coordinated regulation of parameters in four dimensions: spatial ratio, time frequency, current amplitude, and phase difference. The four-dimensional regulation dimensions include the spatial X / Y / Z three-dimensional vector dimension and the time phase dimension.

4. A control method based on the system according to any one of claims 1-3, characterized in that, Includes the following steps: S1. Establish an interlayer magnetic field cancellation model and calibrate the transfer function and radial residual component of each layer coil; S2. Match the spatial ratio parameters of the coil current according to the three-dimensional optical path shape of the target; S3. By introducing a time / phase dimension and adjusting the current frequency and interlayer phase difference, dynamic scanning and morphological switching of the magnetic field gradient can be achieved. S4. Collect real-time feedback data on magnetic field distribution and use closed-loop correction of four-dimensional control parameters.

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