Electronic system for magnetic field on-line measurement and magnetic field on-line measurement method

Abstract

The invention provides an electronics system for magnetic field on-line measurement and a magnetic field on-line measurement method, and relates to the technical field of magnetic field measurement, the system comprises an AC / DC power supply assembly, an analog signal acquisition front end and a digital signal processing rear end, the AC / DC power supply assembly is connected with the digital signal processing rear end; the analog signal acquisition front end comprises at least two mutually independent analog signal acquisition channels, and each analog signal acquisition channel is used for determining a first digital voltage signal corresponding to the analog voltage signal of the corresponding signal source based on the configured front end signal processing parameters; based on a signal source to which the first digital voltage signal belongs, the digital signal processing rear end is used for determining a target detection algorithm; and performing signal processing on the first digital voltage signal based on a target detection algorithm and the rear-end signal processing parameter to obtain magnetic field measurement data of the corresponding signal source. The applicability of magnetic field measurement can be greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic field measurement, and in particular, to an electronics system for on-line magnetic field measurement and a method for on-line magnetic field measurement. Background Art

[0002] As a basic tool in the field of nuclear physics research, particle accelerators are becoming increasingly important in the fields of national defense, aerospace, medical treatment, energy, materials, etc. With the continuous in-depth of scientific research, the requirements for beam energy, beam current and beam quality are getting higher and higher. In the accelerator system, on-line monitoring and real-time correction of the magnetic fields provided by both the dipole magnets for controlling the beam direction and the quadrupole magnets for focusing the beam are necessary conditions for providing a highly uniform and high-precision magnetic field and thus obtaining a high-quality beam. Therefore, on-line measurement of the magnetic field is extremely important.

[0003] Currently, generally, the Hall effect method, the electromagnetic induction method and the nuclear magnetic resonance method are used for magnetic field measurement. Among them, the Hall effect method mainly relies on Hall sensors for the design of test equipment, and the magnetic field intensity is directly calculated through the Hall voltage on the Hall sensor. The electromagnetic induction method is proposed based on Faraday's law of electromagnetic induction. After the induced voltage generated by the coil loop is integrated, the corresponding magnetic flux change can be obtained. The nuclear magnetic resonance method is to generate a resonance phenomenon by applying an external high-frequency electromagnetic field, and the amplitude of the measured magnetic field is calculated from the frequency of the external electromagnetic wave. However, the above methods generally have problems such as single applicable scenarios of equipment, high equipment costs and strict applicable conditions, and cannot meet the rapid development of particle accelerators. Summary of the Invention

[0004] The present invention provides an electronics system for on-line magnetic field measurement and a method for on-line magnetic field measurement, so as to solve the problems in the prior art such as single applicable scenarios of equipment, high equipment costs and strict applicable conditions, and the defect that the rapid development of particle accelerators cannot be satisfied.

[0005] The present invention provides an electronics system for on-line magnetic field measurement, including: an AC / DC power supply component, an analog signal acquisition front end and a digital signal processing back end, wherein: The AC / DC power supply component is connected to the digital signal processing back end, and is used to convert the commercial power AC220V into a DC power supply to supply power to the electronics system for on-line magnetic field measurement; The digital signal processing back end is used to configure the back-end signal processing parameters and the front-end signal processing parameters corresponding to the analog signal acquisition front end; The analog signal acquisition front end includes at least two independent analog signal acquisition channels, and each of the analog signal acquisition channels is used to determine a first digital voltage signal corresponding to the analog voltage signal of the corresponding signal source based on the configured front-end signal processing parameters; The digital signal processing backend is configured to determine a target detection algorithm based on the signal source to which the first digital voltage signal belongs; and perform signal processing on the first digital voltage signal based on the target detection algorithm and the backend signal processing parameters to obtain magnetic field measurement data corresponding to the signal source.

[0006] In the electronics system for online magnetic field measurement provided by the present invention, the digital signal processing backend includes a Zynq part, and the Zynq part includes a programmable logic component and a data processing component, wherein: The programmable logic component is configured to determine a filtered digital voltage signal corresponding to the first digital voltage signal; The data processing component is configured to compare a preset write flag with the current write flag sent by the programmable logic component; when the preset write flag is the same as the current write flag, determine a target detection algorithm based on the signal source to which the filtered digital voltage signal belongs; and perform signal processing on the filtered digital voltage signal based on the target detection algorithm and the backend signal processing parameters to obtain magnetic field measurement data corresponding to the signal source.

[0007] In the electronics system for online magnetic field measurement provided by the present invention, the programmable logic component includes a data decoding module and a digital filter module, wherein: The data decoding module is configured to decode the first digital voltage signal; The digital filter module is configured to filter the decoded first digital voltage signal based on the passband bandwidth in the backend signal processing parameters to obtain the filtered digital voltage signal; the passband bandwidth is the bandwidth corresponding to the analog signal acquisition channel to which the first digital voltage signal belongs.

[0008] In the electronics system for online magnetic field measurement provided by the present invention, the digital filter module includes a first asynchronous memory, a low-pass FIR filter, and a second asynchronous memory connected in series in sequence, wherein: The first asynchronous memory is configured to perform clock domain conversion on the decoded first digital voltage signal to obtain a second digital voltage signal; The low-pass FIR filter is configured to filter the second digital voltage signal based on the cut-off frequency and the passband bandwidth corresponding to the first digital voltage signal to obtain a third digital voltage signal; The second asynchronous memory is configured to perform clock domain reverse conversion on the third digital voltage signal to obtain the filtered digital voltage signal.

[0009] According to the electronics system for on-line magnetic field measurement provided by the present invention, the data processing component is configured to determine the induced voltage algorithm as the target detection algorithm when the signal source to which the filtered digital voltage signal belongs is a magnet coil; and determine the Hall voltage algorithm as the target detection algorithm when the signal source to which the filtered digital voltage signal belongs is a Hall sensor.

[0010] According to the electronics system for on-line magnetic field measurement provided by the present invention, each of the analog signal acquisition channels includes an adjustable gain component, a low-pass filter component, a bias voltage component, an anti-aliasing component, an analog-to-digital conversion component, and a magnetic coupling isolation component connected in series in sequence, where: The adjustable gain component is configured to adjust the amplitude of the analog voltage signal based on the front-end signal processing parameters to obtain a first analog voltage signal; The low-pass filter component is configured to perform analog filtering on the first analog voltage signal to obtain a filtered analog voltage signal; The bias voltage component is configured to add a DC component to the filtered analog voltage signal to obtain a second analog voltage signal; The anti-aliasing component is configured to determine a third analog voltage signal corresponding to the second analog voltage signal; The analog-to-digital conversion component is configured to convert the third analog voltage signal into an initial digital voltage signal; The magnetic coupling isolation component is configured to perform level conversion on the initial digital voltage signal to obtain the first digital voltage signal.

[0011] According to the electronics system for on-line magnetic field measurement provided by the present invention, the adjustable gain component includes an amplitude attenuator and a non-inverting proportional amplifier that are both connected to the Zynq part in the digital signal processing backend and are connected in series, where: The amplitude attenuator is configured to perform amplitude attenuation adjustment on the analog voltage signal; The non-inverting proportional amplifier is configured to perform amplification gain adjustment on the analog voltage signal after amplitude adjustment to obtain the first analog voltage signal.

[0012] According to the electronics system for on-line magnetic field measurement provided by the present invention, the bias voltage component includes a reference voltage source, a first voltage follower unit, and a second voltage follower unit, where: The reference voltage source is connected to the second voltage follower unit, and the reference voltage source is configured to provide a bias voltage; The first voltage follower unit is connected in parallel with the second voltage follower unit, and the first voltage follower unit is configured to determine a first follower voltage signal corresponding to the filtered analog voltage signal; The second voltage follower unit is configured to determine a second follower voltage signal corresponding to the bias voltage, and determine the second analog voltage signal based on the first follower voltage signal and the second follower voltage signal.

[0013] According to the electronics system for on-line magnetic field measurement provided by the present invention, it further includes a magnetic field measurement system. The magnetic field measurement system is an application system for the personal computer terminal to perform real-time measurement of the magnetic field through the electronics system for on-line magnetic field measurement, and is used for instruction interaction, data transmission and real-time display between the electronics system for on-line magnetic field measurement and the personal computer through a network port; the magnetic field measurement system is further used to respond to user operations and determine the backend signal processing parameters and the frontend signal processing parameters.

[0014] The present invention also provides a method for on-line magnetic field measurement, which is applied to the electronics system for on-line magnetic field measurement as described in any one of the above. The method includes: Configure the backend signal processing parameters and the frontend signal processing parameters corresponding to the analog signal acquisition frontend. Based on the signal source to which the first digital voltage signal belongs, determine the target detection algorithm; based on the target detection algorithm and the backend signal processing parameters, perform signal processing on the first digital voltage signal to obtain magnetic field measurement data corresponding to the signal source; the first digital voltage signal is obtained by the analog signal acquisition channels in the analog signal acquisition frontend performing signal processing on the analog voltage signal corresponding to the signal source based on the configured frontend signal processing parameters.

[0015] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the method for on-line magnetic field measurement as described in any one of the above is implemented.

[0016] The present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the method for on-line magnetic field measurement as described in any one of the above is implemented.

[0017] The present invention also provides a computer program product, including a computer program. When the computer program is executed by a processor, the method for on-line magnetic field measurement as described in any one of the above is implemented.

[0018] The electronics system and the method for on-line magnetic field measurement provided by the present invention enable the digital signal processing backend to configure the backend signal processing parameters and the corresponding front-end signal processing parameters of the analog signal acquisition front-end according to actual usage requirements, so that the electronics system can meet the usage requirements in different scenarios. After the parameter configuration is completed, at least two independent analog signal acquisition channels in the analog signal acquisition front-end can collect analog voltage signals corresponding to different signal sources, and can also collect analog voltage signals from different parts of the same magnet or different magnets, and convert them into first digital voltage signals. The digital signal processing backend determines a targeted target detection algorithm based on the signal source to which the first digital voltage signal belongs, and performs signal processing on the first digital voltage signal of the corresponding signal source through the target detection algorithm to determine the magnetic field measurement data of the corresponding signal source. The present invention can meet different application scenarios of magnetic field measurement, greatly improve the applicability of magnetic field measurement, reduce the cost of magnetic field measurement, and improve the reliability and safety of magnetic field measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 FIG. 1 is one of the schematic structural diagrams of the electronics system for on-line magnetic field measurement provided by an embodiment of the present invention.

[0021] Figure 2 FIG. 2 is the schematic structural diagram of the analog signal acquisition channel provided by an embodiment of the present invention.

[0022] Figure 3 FIG. 3 is the schematic structural diagram of the adjustable gain component provided by an embodiment of the present invention.

[0023] Figure 4 FIG. 4 is the schematic structural diagram of the bias voltage component provided by an embodiment of the present invention.

[0024] Figure 5 FIG. 5 is one of the schematic structural diagrams of the Zynq part provided by an embodiment of the present invention.

[0025] Figure 6 FIG. 6 is the schematic structural diagram of the digital filter module provided by an embodiment of the present invention.

[0026] Figure 7 FIG. 7 is the schematic structural diagram of the digital signal processing backend provided by an embodiment of the present invention.

[0027] Figure 8It is the second schematic diagram of the structure of the electronics system for on-line magnetic field measurement provided by the embodiments of the present invention.

[0028] Figure 9 It is the schematic diagram of the interface of the magnetic field measurement system provided by the embodiments of the present invention.

[0029] Figure 10 It is the schematic flow diagram of the on-line magnetic field measurement method provided by the embodiments of the present invention.

[0030] Figure 11 It is the second schematic diagram of the structure of the Zynq part provided by the embodiments of the present invention.

[0031] Reference numerals: 100: AC / DC power supply component; 200: analog signal acquisition front end; 210: adjustable gain component; 211: amplitude attenuator; 212: in-phase proportional amplifier; 220: low-pass filter component; 230: bias voltage component; 231: reference voltage source; 232: first voltage follower unit; 233: second voltage follower unit; 240: anti-aliasing component; 250: analog-to-digital conversion component; 260: magnetic coupling isolation component; 270: analog signal acquisition channel; 300: digital signal processing backend; 310: DC / DC power conversion component; 320: power-on control component; 321: power-on timing management module; 322: watchdog module; 323: power-down protection module; 330: Zynq part; 331: programmable logic component; 332: data processing component; 333: data decoding module; 334: digital filter module; 340: external interface component; 350: clock module; 360: LED indicator; 370: switch button; 400: magnetic field measurement system. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0033] Aiming at the problems in the prior art such as single applicable scenario of equipment, high equipment cost and strict applicable conditions, which cannot meet the high-speed development of particle accelerators, the embodiments of the present invention provide an electronics system for on-line magnetic field measurement. Figure 1 It is the first schematic diagram of the structure of the electronics system for on-line magnetic field measurement provided by the embodiments of the present invention, as Figure 1As shown in the figure, the electronics system for on-line magnetic field measurement includes: an AC / DC power supply component 100, an analog signal acquisition front-end 200, and a digital signal processing back-end 300.

[0034] The AC / DC power supply component 100 is connected to the digital signal processing back-end 300 and is used to convert the commercial power AC220V into a DC power supply to power the electronics system for on-line magnetic field measurement; the digital signal processing back-end 300 is used to configure the back-end signal processing parameters and the front-end signal processing parameters corresponding to the analog signal acquisition front-end 200.

[0035] The analog signal acquisition front-end 200 includes at least two independent analog signal acquisition channels 270, and each of the analog signal acquisition channels 270 is used to determine a first digital voltage signal corresponding to the analog voltage signal of the corresponding signal source based on the configured front-end signal processing parameters.

[0036] The digital signal processing back-end 300 is used to determine a target detection algorithm based on the signal source to which the first digital voltage signal belongs; based on the target detection algorithm and the back-end signal processing parameters, perform signal processing on the first digital voltage signal to obtain magnetic field measurement data of the corresponding signal source.

[0037] Specifically, before signal processing, the digital signal processing back-end 300 can pre-obtain the back-end signal processing parameters set by the user and the front-end signal processing parameters corresponding to the analog signal acquisition front-end 200, configure its own relevant parameters according to the back-end signal processing parameters, and send the front-end signal processing parameters to the analog signal acquisition front-end 200. The analog signal acquisition front-end 200 includes at least two independent analog signal acquisition channels 270, and can configure the parameters of each analog signal acquisition channel 270 according to the received front-end signal processing parameters. The front-end signal processing parameters corresponding to each analog signal acquisition channel 270 can be the same or different, and the embodiments of the present invention do not limit this.

[0038] Optionally, the front-end signal processing parameters may include an attenuation multiple and an amplification gain, and the back-end signal processing parameters may include a working mode, a passband bandwidth, an average number of points, a decimation step, data storage, etc., and the embodiments of the present invention do not limit this.

[0039] After each analog signal acquisition front-end 200 is configured with parameters, it can acquire analog voltage signals corresponding to different signal sources. The signal sources can include magnet coils and Hall sensors. When the signal source is a magnet coil, the analog voltage signal corresponding to the magnet coil can be an induced voltage signal. When the signal source is a Hall sensor, the analog voltage signal corresponding to the Hall sensor can be a Hall voltage signal. Based on this, multiple analog signal acquisition channels 270 in the analog signal acquisition front-end 200 can acquire signals from different magnet coils and different Hall sensors. Compared with the single application scenario in the prior art, the embodiments of the present invention have high applicability and can meet different application scenarios. In addition, multiple analog signal acquisition channels 270 in the analog signal acquisition front-end 200 can measure different signals of the same magnet simultaneously or synchronously measure different magnets, improving the reliability and safety of magnetic field measurement and greatly reducing the cost of magnetic field measurement. After each analog signal acquisition channel 270 acquires the analog voltage signal of the corresponding signal source, it can convert the analog voltage signal into a first digital voltage signal according to the configured front-end signal processing parameters and send the first digital voltage signal to the digital signal processing back-end 300.

[0040] After the digital signal processing back-end 300 receives the first digital voltage signal transmitted by the corresponding analog signal acquisition channel 270, it can determine the signal source to which the first digital voltage signal belongs and determine the corresponding target detection algorithm according to the signal source. Then, it can perform signal processing on the first digital voltage signal according to the configured back-end signal processing parameters and determine the magnetic field measurement data of the corresponding signal source from the processed signal according to the target detection algorithm.

[0041] It should be noted that when the signal source is a magnet coil, the magnetic field measurement data is used to characterize the magnetic field change. When the signal source is a Hall sensor, the magnetic field measurement data is used to characterize the magnetic field strength of the environment where the Hall sensor is located. The magnetic field measurement data is a voltage value and can be converted into magnetic field data corresponding to each signal source later.

[0042] It should be noted that in an electronic system, the analog signal acquisition front-end 200 and the digital signal processing back-end 300 can be connected through an FMC (FPGA Mezzanine Card) socket. That is, after the analog signal acquisition front-end 200 determines the first digital voltage signal corresponding to each analog signal acquisition channel 270, it can send the first digital voltage signal to the digital signal processing back-end 300 through this FMC socket. In addition, each analog voltage acquisition channel can use an SMA (SubMiniature Version A) interface as the input interface.

[0043] In addition, the analog signal acquisition front end 200 further includes an analog power conversion component, which is used to supply power to each module in each analog signal acquisition front end 200.

[0044] Furthermore, Figure 2 is a schematic structural diagram of an analog signal acquisition channel provided by an embodiment of the present invention. As Figure 2 shown, each of the analog signal acquisition channels 270 includes an adjustable gain component 210, a low-pass filter component 220, a bias voltage component 230, an anti-aliasing component 240, an analog-to-digital conversion component 250, and a magnetic coupling isolation component 260 that are connected in series in sequence, where: The adjustable gain component 210 is used to adjust the amplitude of the analog voltage signal based on the front-end signal processing parameters to obtain a first analog voltage signal; The low-pass filter component 220 is used to perform analog filtering on the first analog voltage signal to obtain a filtered analog voltage signal; The bias voltage component 230 is used to add a DC component to the filtered analog voltage signal to obtain a second analog voltage signal; The anti-aliasing component 240 is used to determine a third analog voltage signal corresponding to the second analog voltage signal; The analog-to-digital conversion component 250 is used to convert the third analog voltage signal into an initial digital voltage signal; The magnetic coupling isolation component 260 is used to perform level conversion on the initial digital voltage signal to obtain the first digital voltage signal.

[0045] Specifically, within each analog signal acquisition channel 270, the adjustable gain component 210 is connected to the digital signal processing backend 300 and is used to receive the front-end signal processing parameters corresponding to the analog signal acquisition channel 270 to which it belongs. After being configured according to the front-end signal processing parameters, the adjustable gain component 210 can adjust the amplitude of the analog voltage signal induced by the corresponding signal source as needed according to the actual usage requirements corresponding to the front-end signal processing parameters to obtain a first analog voltage signal with an adjusted amplitude.

[0046] Furthermore, Figure 3 is a schematic structural diagram of the adjustable gain component provided by an embodiment of the present invention. As Figure 3 shown, the adjustable gain component 210 includes an amplitude attenuator 211 and a non-inverting proportional amplifier 212 that are both connected to the Zynq part 330 in the digital signal processing backend 300 and are connected in series, where: The amplitude attenuator 211 is used to perform amplitude attenuation adjustment on the analog voltage signal; The non-inverting proportional amplifier 212 is used to perform amplification gain adjustment on the amplitude-adjusted analog voltage signal to obtain the first analog voltage signal.

[0047] Specifically, in the adjustable gain component 210, both the amplitude attenuator 211 and the non-inverting proportional amplifier 212 include a multiplexing circuit designed with a multiplexer chip as the core. This multiplexing circuit is connected to the digital signal processing backend 300. Among them, the amplitude attenuator 211 receives the attenuation multiple sent by the digital signal processing backend 300 through the corresponding multiplexing circuit, and attenuates the received analog voltage signal according to the attenuator corresponding to the attenuation multiple. Then, the non-inverting proportional amplifier 212 receives the amplification gain sent by the digital signal processing backend 300 through the corresponding multiplexing circuit, and performs amplification gain adjustment on the amplitude-attenuated analog voltage signal to obtain the first analog voltage signal. Through the attenuation multiple and the amplification gain, the maximum input range of the analog-to-digital conversion component 250 can be utilized to the greatest extent, and the minimum resolution of the electronics system can be achieved.

[0048] After that, the low-pass filter component 220 performs the first analog filtering on the amplitude-adjusted first analog voltage signal to obtain a filtered analog voltage signal. The low-pass filter component 220 is preferably a fourth-order Bessel low-pass filter, which is used to eliminate the high-frequency noise components in the first analog voltage signal. In the entire passband, the fourth-order Bessel filter has a constant group delay for any signal, can maintain the complete waveform of the first analog voltage signal corresponding to the channel within the passband range, and will not cause signal distortion due to different group delays of signals with different frequencies within the passband range.

[0049] After that, the bias voltage component 230 is used to add a DC component to the preliminarily filtered filtered analog voltage signal to obtain a second analog voltage signal, so that the baseline of the analog signal acquisition channel 270 is at the middle value of the input range of the analog-to-digital conversion component 250.

[0050] Furthermore, Figure 4 is a schematic structural diagram of the bias voltage component provided by the embodiment of the present invention. As Figure 4 shown, the bias voltage component 230 includes a reference voltage source 231, a first voltage follower unit 232, and a second voltage follower unit 233, where: The reference voltage source 231 is connected to the second voltage follower unit 233, and the reference voltage source 231 is used to provide a bias voltage; The first voltage follower unit 232 is connected in parallel with the second voltage follower unit 233, and the first voltage follower unit 232 is used to determine the first follower voltage signal corresponding to the filtered analog voltage signal; The second voltage follower unit 233 is configured to determine a second follower voltage signal corresponding to the bias voltage, and determine the second analog voltage signal based on the first follower voltage signal and the second follower voltage signal.

[0051] Specifically, the circuit structures corresponding to the first voltage follower unit 232 and the second voltage follower unit 233 are the same. The first voltage follower unit 232 includes a first voltage follower and a first resistor R1 connected in series, and the second voltage follower unit 233 includes a second voltage follower and a second resistor R2 connected in series, and the first voltage follower unit 232 and the second voltage follower unit 233 are connected in parallel. In the bias voltage component 230, the reference voltage source 231 preferably uses a high-precision reference voltage source 231 to generate a reference voltage as the bias voltage. Then, the first voltage follower unit 232 is configured to reduce the influence of the load impedance on the filtered analog voltage signal and determine a first follower voltage signal corresponding to the filtered analog voltage signal. The second voltage follower unit 233 is configured to reduce the influence of the load impedance on the output of the bias voltage and determine a second follower voltage signal corresponding to the bias voltage. The bias voltage is connected to the transmission channel after passing through the second voltage follower unit 233, and the filtered analog voltage signal is superimposed on the bias voltage connected to the transmission channel after passing through the first voltage follower unit 232, that is, the first follower voltage signal and the second follower voltage signal are superimposed. According to the superposition theorem, the superimposed second analog voltage signal can be expressed as , where represents the bias voltage, represents the filtered analog voltage signal corresponding to time t. When ignoring the output impedances corresponding to the first voltage follower and the second voltage follower respectively, the amplitude of the DC bias voltage input to the analog-to-digital conversion component 250 depends entirely on the ratio of the first resistor R1 and the second resistor R2, and the voltage value corresponding to the input signal of the analog-to-digital conversion component 250 is equal to the voltage value of the second analog voltage signal.

[0052] Then, the anti-aliasing component 240 is configured to receive the second analog voltage signal with the DC component added and determine a corresponding third analog voltage signal to avoid aliasing.

[0053] Then, the analog-to-digital conversion component 250 is configured to convert the third analog voltage signal into an initial digital voltage signal in a pseudo-differential form. In the embodiment of the present invention, the analog-to-digital conversion component 250 is preferably designed with a 24-bit ADC (Analog to Digital Converter) chip with a maximum sampling frequency of 1Msps, and the input voltage range is 0V to 5V. Therefore, the minimum resolution unit 1LSB of this ADC chip = 5 / 2 24 ≈0.3μV.

[0054] After that, the magnetic coupling isolation component 260 is used to isolate the output end of the analog-to-digital conversion component 250 from the digital signal processing backend 300, realize the electrical isolation between the analog signal acquisition front end 200 and the digital signal processing backend 300, and perform a level conversion on the initial digital voltage signal to obtain a first digital voltage signal, so as to realize the level conversion of data and instructions between the analog-to-digital conversion component 250 and the digital signal processing backend 300. After determining the first digital voltage signal, the magnetic coupling isolation component 260 can serially output the first digital voltage signal to the digital signal processing backend 300 through the FMC socket.

[0055] Further, the digital signal processing backend 300 includes a Zynq part 330, and the Zynq part 330 includes a programmable logic component 331 and a data processing component 332, wherein: The programmable logic component 331 is used to determine a filtered digital voltage signal corresponding to the first digital voltage signal; The data processing component 332 is used to compare a preset write identifier with the current write identifier sent by the programmable logic component 331; when the preset write identifier is the same as the current write identifier, based on the signal source to which the filtered digital voltage signal belongs, determine a target detection algorithm; based on the target detection algorithm and the backend signal processing parameters, perform signal processing on the filtered digital voltage signal to obtain magnetic field measurement data corresponding to the signal source.

[0056] Specifically, Figure 5 is one of the structural schematic diagrams of the Zynq part provided by the embodiment of the present invention. As Figure 5 shown, in the digital signal processing backend 300, the programmable logic component 331 (i.e., the PL side) in the Zynq part 330 receives the first digital voltage signal sent by the magnetic coupling isolation component 260 through the FMC component, and filters the first digital voltage signal to obtain a filtered digital voltage signal.

[0057] Further, as Figure 5 shown, the programmable logic component 331 includes a data decoding module 333 and a digital filter module 334, wherein: The data decoding module 333 is used to decode the first digital voltage signal; The digital filter module 334 is used to filter the decoded first digital voltage signal based on the passband bandwidth in the backend signal processing parameters to obtain the filtered digital voltage signal; the passband bandwidth is the bandwidth corresponding to the analog signal acquisition channel 270 to which the first digital voltage signal belongs.

[0058] Further, Figure 6It is a schematic structural diagram of the digital filter module provided by the embodiment of the present invention. As Figure 6 shown, the digital filter module 334 includes a first asynchronous memory, a low-pass FIR (Finite Impulse Response) filter, and a second asynchronous memory connected in series in sequence, where: The first asynchronous memory is used to perform clock domain conversion on the decoded first digital voltage signal to obtain a second digital voltage signal; The low-pass FIR filter is used to filter the second digital voltage signal based on the cut-off frequency and the passband bandwidth corresponding to the first digital voltage signal to obtain a third digital voltage signal; The second asynchronous memory is used to perform clock domain reverse conversion on the third digital voltage signal to obtain the filtered digital voltage signal.

[0059] Specifically, the digital filter module 334 adopts a time-division multiplexing multi-channel FIR filter structure with adjustable passband bandwidth. Each filter structure with different bandwidths includes a low-pass FIR filter, a first asynchronous memory, and a second asynchronous memory, and both the first asynchronous memory and the second asynchronous memory are first-in-first-out memories. The decoded first digital voltage signal first passes through the first asynchronous memory, so that the decoded first digital voltage signal is converted from the low clock domain (ClkL) to the high clock domain (ClkH) to obtain a second digital voltage signal. Then, the second digital voltage signal enters the low-pass FIR filter, and the high-frequency noise component in the second digital voltage signal is eliminated through the pre-configured cut-off frequency to obtain a third digital voltage signal. Then, after the third digital voltage signal passes through the second asynchronous memory, the third digital voltage signal is converted from the high clock domain to the low clock domain to obtain the filtered digital voltage signal. For example, taking 10 channels as an example, before the first digital voltage signal enters the first asynchronous memory, the decoded first digital voltage signals of 24 bits, with a maximum sampling rate of 1Msps and parallel transmission for 10 channels (i.e., Figure 6 the D shown in raw 1 to D raw 10) are converted into a data stream of 240 bits and a maximum sampling rate of 1Msps. After this data stream enters the first asynchronous memory, it is converted from the low clock domain to the high clock domain, and a second digital voltage signal of 24 bits and a maximum sampling rate of 10Msps is output. After the second digital voltage signal is filtered by the low-pass FIR filter, a third digital voltage signal of 24 bits and a maximum sampling rate of 10Msps is output. After this third digital voltage signal passes through the second asynchronous memory, it is converted into a data stream of 240 bits and a maximum sampling rate of 1Msps and output, and finally this data stream is converted into 10 filtered digital voltage signals of 24 bits (i.e., Figure 6 the D shown in fir1 to D fir 10) Parallel output. After that, within each channel, the filtered digital voltage signal can be averaged according to the average number of points in the backend signal processing parameters, or decimated according to the decimation step size in the backend signal processing parameters.

[0060] Optionally, both the average step size and the decimation step size can be determined by the Zynq chip in response to user operations. Among them, the decimation step size can include five levels of compensation: 1x, 2x, 4x, 8x, and 16x. The embodiments of the present invention do not limit this.

[0061] After that, the programmable logic component 331 sends the filtered digital voltage signal to the data processing component 332 (Processing System, PS). The PS side can determine whether the filtered digital voltage signal corresponding to the PL side is legal and valid according to the identification verification algorithm, so as to decide whether to perform the next operation, achieving the purpose of precise state control and accurate data synchronization, and ensuring the high reliability of data transmission. That is, the PS side can obtain the current write flag (Flag) sent by the PL side and compare the current write flag with the preset write flag. If the current write flag is the same as the preset write flag, it indicates that the filtered digital voltage signal is legal and valid, and the filtered digital voltage signal is cached in the original data buffer. If the current write flag is different from the preset write flag, it indicates that the filtered digital voltage signal is incorrect, and it can continue to wait for the next write flag.

[0062] When it is determined that the filtered digital voltage signal is legal and valid, determine the signal source to which the filtered digital voltage signal belongs. Different signal sources result in different target detection algorithms. After that, the filtered digital voltage signal can be signal-processed according to the targeted target detection algorithm to obtain the magnetic field measurement data corresponding to the signal source.

[0063] It should be noted that the data processing component 332 is used to determine the induction voltage algorithm as the target detection algorithm when the signal source to which the filtered digital voltage signal belongs is a magnet coil, and signal-process the filtered digital voltage signal according to Faraday's law of electromagnetic induction to obtain the change of the magnetic field. When the signal source to which the filtered digital voltage signal belongs is a Hall sensor, the Hall voltage algorithm is determined as the target detection algorithm, and the filtered digital voltage signal is signal-processed according to the Hall effect to obtain the magnetic field strength of the environment where the Hall sensor is located.

[0064] It should be noted that both the read identifier and the write identifier in the identifier verification algorithm are 8-bit flag bits. The data transmitted between the PL side and the PS side is mutually verified through the identifier verification algorithm. For example, the PS side can read the write identifier of the PL side to verify and synchronize the data processing of the PS side, and the PL side can read the read identifier of the PS side to verify and synchronize the data transmission of the PL side. In addition, the PS side also includes various identifiers such as the IDIE Flag for controlling the trigger mode and the CLEAR Flag for clearing the register.

[0065] It should be noted that Figure 7 is a schematic structural diagram of the digital signal processing backend provided by an embodiment of the present invention. As Figure 7 shown, in the digital signal processing backend 300, in addition to the Zynq part 330, it also includes a DC / DC power conversion component 310, a power-on control component 320, an external interface component 340, a clock module 350, an LED indicator 360, and a switch button 370.

[0066] The DC / DC power conversion component 310 is used for voltage conversion to provide the required voltages for different modules in the digital signal processing backend 300.

[0067] The power-on control component 320 is used to manage the power supply status and power-on sequence of various power signals in the analog signal acquisition front-end 200 and the digital signal processing backend 300. The power-on control component 320 includes a power-on timing management module 321, a watchdog module 322, and a power-down protection module 323. Among them, the power-on timing management module 321 is used to control the power-on timing of the power signals required by each part. For example, it controls the power-on timing of the power signals in the analog power conversion component and the DC / DC power conversion component 310. The watchdog module 322 is used to monitor the working status of the electronics system. The power-down protection module 323 is used to protect the digital signal processing backend 300 in case of sudden power-off.

[0068] The external interface component 340 includes a gigabit Ethernet port module for data interaction between the PS side and the magnetic field measurement system 400, a USB (Universal Serial Bus) to serial port module for system debugging, an SD card (Secure Digital) module for the in-body operation of the Linux kernel system, a JTAG (Joint Test Action Group) interface module for burning and debugging system programs and power-on timing control programs, an optical signal module for fiber-optic communication between the electronics system and an external system, and an electrical signal module for electrical signal communication between the electronics system and an external system.

[0069] The clock module 350 is used to receive and provide clock signals. The LED indicator 360 is used to provide indication signals, and the switch button 370 is used to receive debugging and reset signals.

[0070] Furthermore, Figure 8 is the second structural schematic diagram of the electronics system for on-line magnetic field measurement provided by the embodiment of the present invention. As Figure 8 shown, in addition to the AC / DC power supply component 100, the analog signal acquisition front end 200, and the digital signal processing backend 300, the electronics system further includes a magnetic field measurement system 400.

[0071] The magnetic field measurement system 400 is an application system for the personal computer to perform real-time measurement of the magnetic field through the electronics system for on-line magnetic field measurement, and is used for instruction interaction, data transmission, and real-time display between the electronics system for on-line magnetic field measurement and the personal computer through the network port; the magnetic field measurement system 400 is also used to respond to user operations and determine the backend signal processing parameters and the front-end signal processing parameters.

[0072] The magnetic field measurement system 400 is designed based on the EPICS distributed architecture. Figure 9 is the interface schematic diagram of the magnetic field measurement system 400 provided by the embodiment of the present invention. As Figure 9 shown, it can display the magnetic field state and change of the measured magnetic field in real time and save the corresponding magnetic field data. The magnetic field measurement system 400 can respond to the input operations of the user and obtain the front-end signal processing parameters and the backend signal processing parameters input by the user according to actual usage requirements. For example, the attenuation multiple and amplification gain in the adjustable gain component 210, and the passband bandwidth, average number of points, and decimation step in the PL side of the Zynq part 330, etc. The working mode and trigger mode of the electronics system can also be set in the magnetic field measurement system 400, so that the electronics system meets various magnetic field measurement usage requirements, with a simple and clear interface, obvious operations, and is not prone to misunderstanding or misoperation.

[0073] The electronics system can be designed according to a standard industrial cabinet, equipped with various external interfaces, as well as optical signal and electrical signal transceiver interfaces, which are sufficient to meet the usage requirements of various work sites.

[0074] In the electronics system for on-line magnetic field measurement provided by the embodiments of the present invention, the digital signal processing backend 300 can configure the backend signal processing parameters and the corresponding front-end signal processing parameters of the analog signal acquisition front-end 200 according to the actual usage requirements, so that the electronics system can meet the usage requirements in different scenarios. After the parameter configuration is completed, at least two independent analog signal acquisition channels 270 in the analog signal acquisition front-end 200 can acquire the analog voltage signals corresponding to different signal sources, and can acquire the analog voltage signals of different parts of the same magnet or different magnets, and convert them into first digital voltage signals. The digital signal processing backend 300 determines a targeted target detection algorithm according to the signal source to which the first digital voltage signal belongs, and performs signal processing on the first digital voltage signal of the corresponding signal source through the target detection algorithm to determine the magnetic field measurement data of the corresponding signal source. The embodiments of the present invention can meet different application scenarios of magnetic field measurement, greatly improve the applicability of magnetic field measurement, reduce the cost of magnetic field measurement, and improve the reliability and safety of magnetic field measurement.

[0075] The embodiments of the present invention also provide a method for on-line magnetic field measurement, which is applied to the electronics system for on-line magnetic field measurement as described in any one of the above. Figure 10 It is a schematic flowchart of the method for on-line magnetic field measurement provided by the embodiments of the present invention, as Figure 10 shown, the method includes the following steps 1010 and step 1020.

[0076] Step 1010: Configure the backend signal processing parameters and the corresponding front-end signal processing parameters of the analog signal acquisition front-end.

[0077] Step 1020: Determine a target detection algorithm based on the signal source to which the first digital voltage signal belongs; perform signal processing on the first digital voltage signal based on the target detection algorithm and the backend signal processing parameters to obtain the magnetic field measurement data of the corresponding signal source; the first digital voltage signal is obtained by the analog signal acquisition channels in the analog signal acquisition front-end performing signal processing on the analog voltage signal of the corresponding signal source based on the configured front-end signal processing parameters.

[0078] The on-line magnetic field measurement method provided by the embodiment of the present invention enables the electronics system to meet the usage requirements in different scenarios after configuring the backend signal processing parameters and the corresponding front-end signal processing parameters of the analog signal acquisition front-end according to the actual usage requirements. After the parameter configuration is completed, at least two independent analog signal acquisition front-ends in the analog signal acquisition front-end can collect analog voltage signals corresponding to different signal sources, determine a targeted target detection algorithm according to the signal source to which the first digital voltage signal belongs, and perform signal processing on the first digital voltage signal of the corresponding signal source through the target detection algorithm to determine the magnetic field measurement data of the corresponding signal source. The embodiment of the present invention can meet different application scenarios of magnetic field measurement, greatly improve the applicability of magnetic field measurement, reduce the cost of magnetic field measurement, and improve the reliability and safety of magnetic field measurement.

[0079] Figure 11 It is the second structural schematic diagram of the Zynq part provided by the embodiment of the present invention. As Figure 11 shown, the electronic device may include: a processor 1110, a communication interface 1120, a memory 1130, and a communication bus 1140. Among them, the processor 1110, the communication interface 1120, and the memory 1130 complete mutual communication through the communication bus 1140. The processor 1110 may call logic instructions in the memory 1130 to execute the on-line magnetic field measurement method, and the method includes: configuring the backend signal processing parameters and the corresponding front-end signal processing parameters of the analog signal acquisition front-end. Determining a target detection algorithm based on the signal source to which the first digital voltage signal belongs; performing signal processing on the first digital voltage signal based on the target detection algorithm and the backend signal processing parameters to obtain magnetic field measurement data of the corresponding signal source; the first digital voltage signal is obtained after each analog signal acquisition channel in the analog signal acquisition front-end performs signal processing on the analog voltage signal of the corresponding signal source based on the configured front-end signal processing parameters.

[0080] In addition, when the logical instructions in the above-mentioned memory 1130 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs.

[0081] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the magnetic field on-line measurement method provided by the above-mentioned various methods. The method includes: configuring the backend signal processing parameters and the corresponding front-end signal processing parameters of the analog signal acquisition front-end. Based on the signal source to which the first digital voltage signal belongs, determining the target detection algorithm; based on the target detection algorithm and the backend signal processing parameters, performing signal processing on the first digital voltage signal to obtain the magnetic field measurement data corresponding to the signal source; the first digital voltage signal is obtained by each analog signal acquisition channel in the analog signal acquisition front-end performing signal processing on the analog voltage signal corresponding to the signal source based on the configured front-end signal processing parameters.

[0082] On another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it is implemented to execute the magnetic field on-line measurement method provided by the above-mentioned various methods. The method includes: configuring the backend signal processing parameters and the corresponding front-end signal processing parameters of the analog signal acquisition front-end. Based on the signal source to which the first digital voltage signal belongs, determining the target detection algorithm; based on the target detection algorithm and the backend signal processing parameters, performing signal processing on the first digital voltage signal to obtain the magnetic field measurement data corresponding to the signal source; the first digital voltage signal is obtained by each analog signal acquisition channel in the analog signal acquisition front-end performing signal processing on the analog voltage signal corresponding to the signal source based on the configured front-end signal processing parameters.

[0083] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

[0084] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the above technical solution, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electronics system for on-line magnetic field measurement, characterized in that, It includes: an AC / DC power supply component, a front-end analog signal acquisition unit, and a back-end digital signal processing unit, where: the AC / DC power supply component is connected to the back-end digital signal processing unit and is used to convert the commercial power AC220V into a DC power supply to power the electronics system for on-line magnetic field measurement; the back-end digital signal processing unit is used to configure the back-end signal processing parameters and the corresponding front-end signal processing parameters of the front-end analog signal acquisition unit; the front-end analog signal acquisition unit includes at least two independent analog signal acquisition channels, and each analog signal acquisition channel is used to determine a first digital voltage signal corresponding to the analog voltage signal of the corresponding signal source based on the configured front-end signal processing parameters; the back-end digital signal processing unit is used to determine a target detection algorithm based on the signal source to which the first digital voltage signal belongs; and perform signal processing on the first digital voltage signal based on the target detection algorithm and the back-end signal processing parameters to obtain the magnetic field measurement data of the corresponding signal source.

2. The electronics system for on-line magnetic field measurement according to claim 1, characterized in that, The back-end digital signal processing unit includes a Zynq part, and the Zynq part includes a programmable logic component and a data processing component, where: the programmable logic component is used to determine a filtered digital voltage signal corresponding to the first digital voltage signal; the data processing component is used to compare a preset write identifier with the current write identifier sent by the programmable logic component; when the preset write identifier is the same as the current write identifier, determine a target detection algorithm based on the signal source to which the filtered digital voltage signal belongs; and perform signal processing on the filtered digital voltage signal based on the target detection algorithm and the back-end signal processing parameters to obtain the magnetic field measurement data of the corresponding signal source.

3. The electronics system for on-line magnetic field measurement according to claim 2, wherein The programmable logic component includes a data decoding module and a digital filter module, where: the data decoding module is used to decode the first digital voltage signal; the digital filter module is used to filter the decoded first digital voltage signal based on the passband bandwidth in the back-end signal processing parameters to obtain the filtered digital voltage signal; the passband bandwidth is the bandwidth corresponding to the analog signal acquisition channel to which the first digital voltage signal belongs.

4. The electronics system for on-line magnetic field measurement according to claim 3, characterized in that The digital filter module includes a first asynchronous memory, a low-pass FIR filter, and a second asynchronous memory connected in series in sequence, where: the first asynchronous memory is used to perform clock domain conversion on the decoded first digital voltage signal to obtain a second digital voltage signal; the low-pass FIR filter is used to filter the second digital voltage signal based on the cut-off frequency and the passband bandwidth corresponding to the first digital voltage signal to obtain a third digital voltage signal; the second asynchronous memory is used to perform clock domain reverse conversion on the third digital voltage signal to obtain the filtered digital voltage signal.

5. The electronics system for on-line magnetic field measurement according to claim 2, wherein, The data processing component is used to determine the induction voltage algorithm as the target detection algorithm when the signal source to which the filtered digital voltage signal belongs is a magnet coil; and determine the Hall voltage algorithm as the target detection algorithm when the signal source to which the filtered digital voltage signal belongs is a Hall sensor.

6. The electronics system for on-line magnetic field measurement according to claim 1, characterized in that Each of the analog signal acquisition channels includes an adjustable gain component, a low-pass filter component, a bias voltage component, an anti-aliasing component, an analog-to-digital conversion component, and a magnetic coupling isolation component connected in series in sequence, where: The adjustable gain component is used to adjust the amplitude of the analog voltage signal based on the front-end signal processing parameters to obtain a first analog voltage signal; The low-pass filter component is used to perform analog filtering on the first analog voltage signal to obtain a filtered analog voltage signal; The bias voltage component is used to add a DC component to the filtered analog voltage signal to obtain a second analog voltage signal; The anti-aliasing component is used to determine a third analog voltage signal corresponding to the second analog voltage signal; The analog-to-digital conversion component is used to convert the third analog voltage signal into an initial digital voltage signal; The magnetic coupling isolation component is used to perform level conversion on the initial digital voltage signal to obtain the first digital voltage signal.

7. The electronics system for on-line magnetic field measurement according to claim 6, characterized in that, The adjustable gain component includes an amplitude attenuator and a non-inverting proportional amplifier that are both connected to the Zynq part in the digital signal processing backend and are connected in series, where: The amplitude attenuator is used to perform amplitude attenuation adjustment on the analog voltage signal; The non-inverting proportional amplifier is used to perform amplification gain adjustment on the analog voltage signal after amplitude adjustment to obtain the first analog voltage signal.

8. The electronics system for on-line magnetic field measurement according to claim 6, characterized in that, The bias voltage component includes a reference voltage source, a first voltage follower unit, and a second voltage follower unit, where: The reference voltage source is connected to the second voltage follower unit, and the reference voltage source is used to provide a bias voltage; The first voltage follower unit is connected in parallel with the second voltage follower unit, and the first voltage follower unit is used to determine a first follower voltage signal corresponding to the filtered analog voltage signal; The second voltage follower unit is used to determine a second follower voltage signal corresponding to the bias voltage, and based on the first follower voltage signal and the second follower voltage signal, determine the second analog voltage signal.

9. The electronics system for on-line magnetic field measurement according to claim 1, characterized in that, It further includes a magnetic field measurement system. The magnetic field measurement system is an application system for real-time measurement of the magnetic field by a personal computer through the electronics system for on-line magnetic field measurement, and is used for instruction interaction, data transmission, and real-time display between the electronics system for on-line magnetic field measurement and the personal computer through a network port; the magnetic field measurement system is further used to respond to user operations to determine the backend signal processing parameters and the front-end signal processing parameters.

10. A method for on-line measurement of magnetic field, characterized in that, Applied to the electronics system for on-line magnetic field measurement according to any one of claims 1-9, the method includes: Configuring backend signal processing parameters and front-end signal processing parameters corresponding to the analog signal acquisition front-end; Determine a target detection algorithm based on the signal source to which the first digital voltage signal belongs; perform signal processing on the first digital voltage signal based on the target detection algorithm and the backend signal processing parameters to obtain magnetic field measurement data corresponding to the signal source; the first digital voltage signal is obtained by each analog signal acquisition channel in the analog signal acquisition front end performing signal processing on the analog voltage signal of the corresponding signal source based on the configured front-end signal processing parameters.

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