High-precision data acquisition processing and magnetic field driving system

Abstract

The invention relates to a high-precision data acquisition processing and magnetic field driving system. The high-precision data acquisition processing and magnetic field driving system mainly comprises a data acquisition module, a processing module, a magnetic field driving module, a power supply module and an upper computer, wherein the data acquisition module converts an external analog signal into a digital signal and transmits the digital signal to the processing module, the processing module comprises a processing unit, a high-stability constant-temperature crystal oscillator, an external clock signal interface, a DDR chip, a Flash memory, a high-speed connector and a digital power supply module, and the module performs digital processing of filtering, phase locking and the like on the signal. The upper computer can communicate with the FPGA core processing module through a network port and a serial port, controls the bias, amplitude and frequency of a signal generated by the magnetic field driving module, displays read online data and generates a real-time curve. The nuclear magnetic resonance gyroscope magnetic field electric control system is low in cost and high in precision, and high-precision magnetic field closed-loop control over the nuclear magnetic resonance gyroscope is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic field precision control, and in particular to a high-precision data acquisition processing and magnetic field driving system. Background Art

[0002] With the rapid development of quantum mechanics, micro-nano technology, automatic control technology, laser technology and other technologies, atomic devices such as atomic clocks and atomic magnetometers have made great progress. The nuclear magnetic resonance gyroscope developed using the atomic spin effect is an atomic sensor with miniaturization potential. It has the characteristics of high precision, low cost and small size, and is considered to be one of the development directions of core components of future miniaturized high-precision positioning, timing and navigation systems.

[0003] The nuclear magnetic resonance gyroscope needs to be sensitive to angular velocity under the combined effects of light, heat and magnetism. The inert gas and alkali metal atoms of the nuclear magnetic resonance gyroscope are in the core sensitive element, namely the gas chamber. When working, the bias magnetic field and the resonant magnetic field must work together to maintain the nuclear magnetic resonance state; in order to reduce external magnetic field interference, magnetic shielding and magnetic compensation must work together. High-precision data acquisition and processing and magnetic field drive systems are the prerequisites for realizing the closed-loop control of the bias magnetic field, resonant magnetic field and residual magnetism of the nuclear magnetic resonance gyroscope.

[0004] Currently, the commonly used data acquisition and processing and magnetic field drive systems are built with a variety of commercial equipment, which are large in size and have fixed functions. In addition, in order to meet the required indicators of the nuclear magnetic resonance gyroscope, expensive special equipment is required, such as providing clock signals through additional high-stability clock references, which brings many inconveniences to the actual use of the nuclear magnetic resonance gyroscope. Summary of the invention

[0005] In view of this, the present invention proposes a high-precision data acquisition and processing and magnetic field drive system, which aims to solve the problems of large size, high cost and insufficient integration of existing data acquisition and processing and magnetic field drive systems in current technology, as well as the problem of insufficient clock reference stability of traditional core processing modules. By providing photoelectric signals for acquisition of nuclear magnetic resonance gyroscopes, filtering, phase locking and other processing are performed, and a magnetic field is generated by driving current signals, high-precision closed-loop control of the bias magnetic field, resonant magnetic field and residual magnetic field is achieved.

[0006] The present invention proposes a high-precision data acquisition processing and magnetic field driving system, comprising:

[0007] A data acquisition module, used for acquiring an external analog signal and amplifying the external analog signal, and the data acquisition module is also used for converting the amplified external analog signal into a digital signal;

[0008] A processing module, electrically connected to the data acquisition module, and configured to pre-process the digital signal, wherein the pre-processing includes: filtering, phase-locking, and frequency adjustment;

[0009] A magnetic field driving module, electrically connected to the magnetic induction coil and the processing module, respectively, the magnetic field driving module is used to convert the pre-processed processing module into a current signal, and the magnetic field driving module is also used to transmit the current signal to the magnetic induction coil to drive the magnetic induction coil to generate a magnetic field;

[0010] A power supply module, electrically connected to the data acquisition module, the processing module and the magnetic field driving module respectively, wherein a multi-stage filtering structure is configured inside the power supply module, and the power supply module is used to provide electric energy to the data acquisition module, the processing module and the magnetic field driving module respectively;

[0011] The host computer is equipped with a connection unit. The host computer communicates with the processing module based on the connection unit. The host computer is used to display the data transmitted by the processing module in real time. The host computer is also used to send a control word driven by a magnetic field to the processing module.

[0012] Furthermore, the data acquisition module includes:

[0013] A high-speed differential amplifier unit, used for acquiring the external analog signal and amplifying the external analog signal;

[0014] The analog-to-digital conversion unit is electrically connected to the high-speed differential amplifier unit, and the analog-to-digital conversion unit is used to convert the amplified external analog signal into the digital signal.

[0015] Furthermore, the processing module includes:

[0016] A processing unit, used for preprocessing the digital signal;

[0017] A clock source, used for outputting a reference clock signal;

[0018] An external clock synchronization interface, electrically connected to the processing unit and the external device, respectively, and the external clock synchronization interface is used to synchronize the processing unit and the external device;

[0019] A dynamic random access memory unit, electrically connected to the processing unit, and used for temporarily storing processing data of the processing unit;

[0020] The transmission connection unit is electrically connected to the analog-to-digital conversion unit and the processing unit respectively, and the transmission connection unit is used to obtain the digital signal and transmit the digital signal to the processing unit.

[0021] Furthermore, the magnetic field driving module includes:

[0022] A digital-to-analog conversion unit, electrically connected to the transmission connection unit, and configured to convert the preprocessed digital signal into an analog voltage signal;

[0023] The voltage-controlled current source unit is electrically connected to the digital-to-analog conversion unit, and is used for converting the analog voltage signal into a current signal and outputting the current signal to the magnetic induction coil.

[0024] Furthermore, the structure of the processing unit is an FPGA structure or a DSP structure.

[0025] Furthermore, the connection unit is specifically: connecting to a network port or connecting to a serial port.

[0026] Furthermore, the host computer is also used to send an initial control word to set the frequency, amplitude and phase of the magnetic field driving module;

[0027] The processing module is also used to automatically adjust the magnetic field output according to the initial control word in combination with a closed-loop feedback control mechanism.

[0028] Furthermore, the processing module is also used to automatically adjust the magnetic field output according to the initial control word in combination with a closed-loop feedback control mechanism, including:

[0029] The processing module is also used to obtain the feedback signal collected by the data collection module and feedback the data;

[0030] The processing module is further used to analyze the error between the current magnetic field output and the preset target value based on the feedback signal, and the processing module is further used to generate corresponding frequency correction value, amplitude correction value and phase correction value according to the error;

[0031] The processing module is also used to dynamically adjust the control word according to the closed-loop control algorithm, and transmit the adjusted control word to the magnetic field driving module, so that the magnetic field driving module receives the adjusted control word, and generates a corrected current signal based on the digital-to-analog conversion module and the voltage-controlled current source module to drive the coil to generate a magnetic field.

[0032] Compared with the prior art, the beneficial effect of the present invention is that the data acquisition module can not only amplify the external analog signal, but also convert it into a digital signal with high precision, laying a good foundation for subsequent processing. This design improves the processing capability of weak signals, ensures that the input signal has a high signal-to-noise ratio in the initial stage of acquisition, greatly reduces the error caused by weak signal or noise interference, and provides a guarantee for the high-precision data acquisition of the system. Secondly, the preprocessing of the digital signal is realized by the processing module, including functions such as filtering, phase locking and frequency adjustment. The collaborative work of these functions effectively improves the quality of signal processing and makes the output signal more stable and accurate. In particular, the phase-locked processing and frequency adjustment functions can effectively correct the slight deviations of the timing and frequency in the system to ensure the consistency of the frequency and phase of the signal. This high-precision preprocessing enables the system to still achieve stable signal output when facing a complex signal environment, effectively improving the anti-interference ability and the frequency stability of the signal. In addition, the magnetic field driving module generates a magnetic field by converting the processed signal into a current signal and transmitting it to the magnetic induction coil. This design makes the generation and control of the magnetic field more direct and accurate, and improves the load capacity and stability of the driving current signal. Through the magnetic field driving module, different magnetic fields can be generated in real time and flexibly to meet the needs of practical applications. It is suitable for occasions such as nuclear magnetic resonance that require precise magnetic field control. At the same time, the power module can provide stable low-noise power for the data acquisition module, processing module and magnetic field driving module through a multi-stage filter. This design not only ensures the stability of power supply, but also effectively suppresses the interference of power supply noise on the system, avoids problems such as clock jitter and sampling error caused by power supply fluctuations. In addition, the power module can also determine the noise suppression level according to the actual power situation, and provide suitable power regulation solutions for different working states, further improving the efficiency and reliability of system operation. Finally, through the communication between the host computer and the processing module, the host computer can not only display the collected and processed data in real time, but also dynamically adjust the frequency, amplitude and phase of the magnetic field drive by sending control words to adapt to different magnetic field control requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0034] Figure 1 A structural diagram of a high-precision data acquisition and processing and magnetic field driving system provided by an embodiment of the present invention;

[0035] Figure 2 A functional block diagram of a processing module provided in an embodiment of the present invention;

[0036] Among them, 1. Data acquisition module; 2. High-speed differential amplifier unit; 3. Analog-to-digital conversion unit; 4. Transmission connection unit; 5. Processing unit; 6. Processing module; 7. Clock source; 8. External clock synchronization interface; 9. Dynamic random access memory unit; 10. Host computer; 11. Magnetic field drive module; 12. Digital-to-analog conversion unit; 13. Power supply module; 14. Voltage-controlled current source unit. DETAILED DESCRIPTION

[0037] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] like Figure 1 As shown, in some embodiments of the present application, this embodiment provides a high-precision data acquisition processing and magnetic field drive system, including: a data acquisition module 1, a processing module 6, a magnetic field drive module 11, a power supply module 13 and a host computer 10.

[0039] Specifically, the data acquisition module 1 is used to obtain an external analog signal and amplify the external analog signal. The data acquisition module 1 is also used to convert the amplified external analog signal into a digital signal. The processing module 6 is electrically connected to the data acquisition module 1. The processing module 6 is used to pre-process the digital signal, wherein the pre-processing includes: filtering processing, phase-locked processing, and frequency adjustment processing. The magnetic field driving module 11 is electrically connected to the magnetic induction coil and the processing module 6 respectively. The magnetic field driving module 11 is used to convert the pre-processed processing module 6 into a current signal. The magnetic field driving module 11 is also used to convert the current signal The signal is transmitted to the magnetic induction coil to drive the magnetic induction coil to generate a magnetic field; the power supply module 13 is electrically connected to the data acquisition module 1, the processing module 6 and the magnetic field driving module 11 respectively, and a multi-stage filtering structure is configured inside the power supply module 13. The power supply module 13 is used to provide power to the data acquisition module 1, the processing module 6 and the magnetic field driving module 11 respectively; the host computer 10 is configured with a connection unit, and the host computer 10 communicates with the processing module 6 based on the connection unit. The host computer 10 is used to display the data transmitted by the processing module 6 in real time. The host computer 10 is also used to send a control word for magnetic field drive to the processing module 6.

[0040] It can be understood that the data acquisition module 1 acquires and amplifies the external analog signal to enhance the weak signal to a level suitable for subsequent digital processing. This process uses a high-speed differential amplifier to enhance the signal while suppressing noise to improve the signal-to-noise ratio of signal acquisition and ensure that the required information can be accurately extracted under a changing external environment. Subsequently, the acquisition module converts the amplified analog signal into a digital signal to facilitate subsequent digital processing. Next, the processing module 6 further preprocesses the digital signal transmitted by the data acquisition module 1, including filtering, phase-locking and frequency adjustment. These preprocessing steps are crucial in the field of signal processing. Filtering can remove interference and clutter in the signal and retain effective information; phase-locking ensures that the phase of the signal is stable, helps to eliminate possible phase drift, and ensures signal phase synchronization; frequency adjustment further calibrates the frequency of the signal to make it consistent with the preset reference. The combined effect of these steps greatly improves the stability and accuracy of the output signal, providing a high-quality input signal for subsequent magnetic field drive. In addition, the signal preprocessed by the processing module 6 is transmitted to the magnetic field drive module 11. The design core of this module is to convert the digitized signal into a current signal to drive the magnetic induction coil to generate a corresponding magnetic field. The magnetic field driving module 11 uses a digital-to-analog converter (DAC) and a voltage-controlled current source (VCCS) to accurately convert the preprocessed signal into a current signal suitable for magnetic field control. The magnitude and stability of the current directly affect the strength and accuracy of the magnetic field. The voltage-controlled current source accurately controls the current to ensure the stability and adjustability of the magnetic field generated by the magnetic induction coil. The module can generate the required magnetic field under different working conditions and meet the requirements of precise magnetic field control. At the same time, the power supply module 13 provides stable power support for various parts of the system and suppresses power supply noise through a multi-stage filter. For high-precision signal processing systems, the stability of the power supply directly affects the reliability of data acquisition and signal processing. The multi-stage filtering design can effectively reduce power supply fluctuations, avoid sampling errors and clock jitter caused by power supply noise, and ensure the normal operation of each module. The power supply module 13 can also adapt to different load requirements and working environments. Finally, the host computer 10 communicates bidirectionally with the processing module 6, playing a dual role of data monitoring and control instruction sending. By displaying the data transmitted by the processing module 6 in real time, the host computer 10 can provide visual feedback on the status of the processing module 6, so that the operator can monitor the actual effect of signal processing and magnetic field driving. In addition, the host computer 10 can also send adjustment instructions of magnetic field driving parameters (such as frequency, amplitude and phase) to the processing module 6 through control words, so as to achieve precise control of the magnetic field output.

[0041] Specifically, the data acquisition module 1 includes: a high-speed differential amplifier unit 2 for acquiring and amplifying an external analog signal; an analog-to-digital conversion unit 3 electrically connected to the high-speed differential amplifier unit 2, and the analog-to-digital conversion unit 3 is used to convert the amplified external analog signal into a digital signal.

[0042] Specifically, the processing module 6 includes: a processing unit 5 for preprocessing digital signals; a clock source 7 for outputting a reference clock signal; an external clock synchronization interface 8 electrically connected to the processing unit 5 and an external device respectively, and the external clock synchronization interface 8 is used to synchronize the processing unit 5 and the external device; a dynamic random access memory unit 9 electrically connected to the processing unit 5, and the dynamic random access memory unit 9 is used to temporarily store processing data of the processing unit 5; a transmission connection unit 4 electrically connected to the analog-to-digital conversion unit 3 and the processing unit 5 respectively, and the transmission connection unit 4 is used to obtain digital signals and transmit the digital signals to the processing unit 5.

[0043] Specifically, the magnetic field driving module 11 includes: a digital-to-analog conversion unit 12 electrically connected to the transmission connection unit 4, and the digital-to-analog conversion unit 12 is used to convert the preprocessed digital signal into an analog voltage signal; a voltage-controlled current source unit 14 electrically connected to the digital-to-analog conversion unit 12, and the voltage-controlled current source unit 14 is used to convert the analog voltage signal into a current signal and output it to the magnetic induction coil.

[0044] It can be understood that the data acquisition module 1 includes a high-speed differential amplifier unit 2 and an analog-to-digital conversion unit 3, the former is used to amplify the external analog signal, and the latter converts the amplified analog signal into a digital signal for processing. The processing module 6 is composed of multiple units, the clock source 7 provides a reference clock signal to ensure the synchronization of the system operation, and the external clock synchronization interface 8 realizes the synchronization of the processing unit 5 and the external device. The processing unit 5 pre-processes the received digital signal, the dynamic random access memory unit 9 temporarily stores the intermediate data for processing, and the transmission connection unit 4 is responsible for transmitting the analog-to-digital converted digital signal to the processing unit 5. The magnetic field driving module 11 uses the digital-to-analog conversion unit 12 to convert the pre-processed digital signal into an analog voltage signal, and then converts it into a current signal through the voltage-controlled current source unit 14 and transmits it to the magnetic induction coil, thereby driving the magnetic induction coil to generate the required magnetic field. This design realizes the overall process from signal acquisition to digital processing to magnetic field drive, ensuring that the magnetic field can be controlled with high precision.

[0045] Specifically, the structure of the processing unit 5 is an FPGA structure or a DSP structure.

[0046] It can be understood that the processing unit 5 adopts an FPGA (field programmable gate array) structure or a DSP (digital signal processor) structure, which means that the processing unit 5 implements data processing functions through these two hardware platforms. The FPGA structure provides a high degree of parallel processing capability and can flexibly configure hardware logic according to requirements, which is very suitable for real-time, high-speed data processing tasks; while the DSP structure focuses on efficient digital signal processing and is suitable for processing complex mathematical operations and signal analysis tasks. The combination of the two can select the most suitable hardware architecture according to different processing requirements to improve processing efficiency and flexibility.

[0047] Specifically, the connection unit is: a connection network port or a connection serial port.

[0048] like Figure 2 As shown, in some embodiments of the present application, the host computer 10 is also used to send an initial control word to set the frequency, amplitude and phase of the magnetic field driving module 11; the processing module 6 is also used to automatically adjust the magnetic field output according to the initial control word in combination with a closed-loop feedback control mechanism.

[0049] Specifically, the processing module 6 is also used to automatically adjust the magnetic field output according to the initial control word in combination with the closed-loop feedback control mechanism, including: the processing module 6 is also used to obtain the feedback signal collected by the data acquisition module 1 and the feedback data; the processing module 6 is also used to analyze the error between the current magnetic field output and the preset target value based on the feedback signal, and the processing module 6 is also used to generate corresponding frequency correction values, amplitude correction values ​​and phase correction values ​​according to the error; the processing module 6 is also used to dynamically adjust the control word according to the closed-loop control algorithm, and transmit the adjusted control word to the magnetic field driving module 11, so that the magnetic field driving module 11 receives the adjusted control word, and generates a corrected current signal based on the digital-to-analog conversion module and the voltage-controlled current source module to drive the coil to generate a magnetic field.

[0050] It is understandable that the host computer 10 sends an initial control word, which sets the basic parameters of the magnetic field drive module 11, such as frequency, amplitude and phase, and then starts the generation of the magnetic field. This initial control word provides the starting parameters of the magnetic field output and is the benchmark for the adjustment process. In the process of magnetic field generation, the processing module 6 plays a key role. The processing module 6 not only performs operations according to the initial control word, but also adjusts the magnetic field output in real time in combination with the closed-loop feedback control mechanism. The magnetic field output is monitored in real time by the data acquisition module 1 to obtain feedback signals. These feedback signals include actual magnetic field frequency, amplitude and phase information. After receiving these feedback signals, the processing module 6 analyzes the error between the current magnetic field output and the preset target value, calculates the error value and adjusts it accordingly. The generation of the error means that the current output is deviated from the predetermined target value. The processing module 6 calculates the correction values ​​of the frequency, amplitude and phase based on the feedback signal, and generates a new control word. At this time, the closed-loop control algorithm comes into play, and the system output is optimized by dynamically adjusting the control word. The processing module 6 transmits the adjusted control word to the magnetic field drive module 11 to ensure that the drive module receives the updated instruction and starts to perform the corresponding adjustment. Through the digital-to-analog conversion module, the digital signal is converted into an analog current signal, and the voltage-controlled current source module generates a corresponding current drive signal, thereby driving the coil to generate a corrected magnetic field. This adjustment process based on closed-loop feedback can not only ensure that the magnetic field output accurately meets the preset target, but also dynamically adapt to the influence of changes in the internal and external environment of the system. For example, if the external conditions change or the performance of the device itself fluctuates, the feedback mechanism can respond in real time and automatically adjust to ensure that the magnetic field output always remains within the expected range. This closed-loop feedback control system has a strong adaptive ability, can automatically correct the output error, and improve the stability and reliability of the system. Through continuous feedback and correction, the system can continuously optimize the performance of the magnetic field, reduce errors, and maximize the accuracy of the magnetic field output.

[0051] Specifically, the processing module 6 needs to perform clock distribution and waveform generation. The clock signal generated by the high-stability constant temperature crystal oscillator is multiplied in the processing unit 5 as the clock reference of the digital-to-analog conversion unit 12 and the analog-to-digital conversion unit 3, and combined with the frequency control word, phase control word and frequency correction value obtained by the phase-locked loop closed-loop feedback issued by the host computer 10, a corresponding digital signal is generated based on the coordinate rotation digital calculation algorithm (CORDIC algorithm). This signal is the reference signal of the digital phase-locked loop, and the signal is converted into a current signal output through the digital-to-analog conversion unit 12.

[0052] In the above embodiment, the data acquisition module 1 can not only amplify the external analog signal, but also convert it into a digital signal with high precision, which lays a good foundation for subsequent processing. This design improves the processing ability of weak signals, ensures that the input signal has a high signal-to-noise ratio in the initial stage of acquisition, greatly reduces the error caused by weak signal or noise interference, and provides a guarantee for the high-precision data acquisition of the system. Secondly, the preprocessing of the digital signal is realized by the processing module 6, including functions such as filtering, phase locking and frequency adjustment. The collaborative work of these functions effectively improves the quality of signal processing and makes the output signal more stable and accurate. In particular, the phase-locked processing and frequency adjustment functions can effectively correct the slight deviations of the timing and frequency in the system to ensure the consistency of the frequency and phase of the signal. This high-precision preprocessing enables the system to still achieve stable signal output when facing a complex signal environment, effectively improving the anti-interference ability and the frequency stability of the signal. In addition, the magnetic field driving module 11 generates a magnetic field by converting the processed signal into a current signal and transmitting it to the magnetic induction coil. This design makes the generation and control of the magnetic field more direct and accurate, and improves the carrying capacity and stability of the driving current signal. Through the magnetic field driving module 11, different magnetic fields can be generated in real time and flexibly to meet the actual application requirements, and are suitable for occasions such as nuclear magnetic resonance that require precise magnetic field control. At the same time, the power supply module 13 can provide stable low-noise electric energy for the data acquisition module 1, the processing module 6 and the magnetic field driving module 11 through a multi-stage filter. This design not only ensures the stability of power supply, but also effectively suppresses the interference of power supply noise to the system, avoids the problems such as clock jitter and sampling error caused by power supply fluctuations, and in addition, the power supply module 13 can also determine the noise suppression level according to the actual power situation, and provide suitable power regulation schemes for different working states, further improving the efficiency and reliability of system operation. Finally, through the communication between the host computer 10 and the processing module 6, the host computer 10 can not only display the data collected and processed in real time, but also dynamically adjust the frequency, amplitude and phase of the magnetic field drive by sending control words to adapt to different magnetic field control requirements.

[0053] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0054] The present application is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0055] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0056] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0057] 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 above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A high-precision data acquisition and processing and magnetic field driving system, characterized in that: include: A data acquisition module, used for acquiring an external analog signal and amplifying the external analog signal, and the data acquisition module is also used for converting the amplified external analog signal into a digital signal; A processing module, electrically connected to the data acquisition module, and used for preprocessing the digital signal, wherein the preprocessing includes: filtering processing, phase-locking processing, and frequency adjustment processing; A magnetic field driving module, electrically connected to the magnetic induction coil and the processing module, respectively, the magnetic field driving module is used to convert the pre-processed processing module into a current signal, and the magnetic field driving module is also used to transmit the current signal to the magnetic induction coil to drive the magnetic induction coil to generate a magnetic field; A power supply module, electrically connected to the data acquisition module, the processing module and the magnetic field driving module respectively, wherein a multi-stage filtering structure is configured inside the power supply module, and the power supply module is used to provide electric energy to the data acquisition module, the processing module and the magnetic field driving module respectively; The host computer is configured with a connection unit. The host computer communicates with the processing module based on the connection unit. The host computer is used to display the data transmitted by the processing module in real time. The host computer is also used to send a control word driven by a magnetic field to the processing module.

2. The high-precision data acquisition and processing and magnetic field driving system according to claim 1, characterized in that: The data acquisition module comprises: A high-speed differential amplifier unit, used for acquiring the external analog signal and amplifying the external analog signal; The analog-to-digital conversion unit is electrically connected to the high-speed differential amplifier unit, and the analog-to-digital conversion unit is used to convert the amplified external analog signal into the digital signal.

3. The high-precision data acquisition and processing and magnetic field driving system according to claim 2, characterized in that: The processing module comprises: A processing unit, used for preprocessing the digital signal; A clock source, used for outputting a reference clock signal; An external clock synchronization interface, electrically connected to the processing unit and the external device, respectively, and the external clock synchronization interface is used to synchronize the processing unit and the external device; A dynamic random access memory unit, electrically connected to the processing unit, and used for temporarily storing processing data of the processing unit; The transmission connection unit is electrically connected to the analog-to-digital conversion unit and the processing unit respectively, and the transmission connection unit is used to obtain the digital signal and transmit the digital signal to the processing unit.

4. The high-precision data acquisition and processing and magnetic field driving system according to claim 3, characterized in that: The magnetic field driving module comprises: A digital-to-analog conversion unit, electrically connected to the transmission connection unit, and configured to convert the preprocessed digital signal into an analog voltage signal; A voltage-controlled current source unit is electrically connected to the digital-to-analog conversion unit, and is used to convert the analog voltage signal into a current signal and output it to the magnetic induction coil.

5. The high-precision data acquisition processing and magnetic field driving system according to claim 3, characterized in that: The structure of the processing unit is FPGA structure or DSP structure.

6. The high-precision data acquisition and processing and magnetic field driving system according to claim 1, characterized in that: The connection unit is specifically: a connection network port or a connection serial port.

7. The high-precision data acquisition and processing and magnetic field driving system according to claim 1, characterized in that: The host computer is also used to send an initial control word to set the frequency, amplitude and phase of the magnetic field driving module; The processing module is also used to automatically adjust the magnetic field output according to the initial control word in combination with a closed-loop feedback control mechanism.

8. The high-precision data acquisition and processing and magnetic field driving system according to claim 7, characterized in that: The processing module is also used to automatically adjust the magnetic field output according to the initial control word in combination with a closed-loop feedback control mechanism, including: The processing module is also used to obtain the feedback signal collected by the data collection module and feedback the data; The processing module is further used to analyze the error between the current magnetic field output and the preset target value based on the feedback signal, and the processing module is further used to generate corresponding frequency correction value, amplitude correction value and phase correction value according to the error; The processing module is also used to dynamically adjust the control word according to the closed-loop control algorithm, and transmit the adjusted control word to the magnetic field driving module, so that the magnetic field driving module receives the adjusted control word, and generates a corrected current signal based on the digital-to-analog conversion module and the voltage-controlled current source module to drive the coil to generate a magnetic field.

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