CN218567633U - Larmor frequency tracking device for tracking type quantum magnetometer - Google Patents
Larmor frequency tracking device for tracking type quantum magnetometer Download PDFInfo
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- CN218567633U CN218567633U CN202222093249.4U CN202222093249U CN218567633U CN 218567633 U CN218567633 U CN 218567633U CN 202222093249 U CN202222093249 U CN 202222093249U CN 218567633 U CN218567633 U CN 218567633U
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Abstract
The utility model relates to a larmor frequency tracking device for tracking formula quantum magnetometer, including ZYNQ7020 controller module, controller crystal oscillator circuit, AD crystal oscillator circuit, power module, magnetic resonance signal conditioning module, analog-to-digital conversion module, procedure download module, automatic re-setting module and communication module, it uses ZYNQ7020 controller module as control core, provides 3 data acquisition channels and gathers conditioning module output signal in real time to utilize PID algorithm real-time tracking locking larmor frequency. The utility model is used for the Larmor frequency tracking device of tracking formula quantum magnetometer can realize the real-time tracking of Larmor frequency, has better portability and stronger stability. A ZYNQ7020 controller is adopted to improve the Larmor frequency tracking speed and the hardware stability of the tracking type quantum magnetometer.
Description
Technical Field
The utility model belongs to the technical field of the magnetic field measurement, concretely relates to larmor frequency tracking means for trail type quantum magnetometer is applied to magnetism abnormal signal detection trades such as in the pit, aviation, ocean, has portability, can be used to in the quantum magnetometer.
Background
Most of the existing Larmor frequency tracking devices adopt a harmonic conditioning circuit and a classical PID controller. However, the traditional controller-mounted platform adopts a mode of combining stm32 and the FPGA, so that the processing speed is low, related circuits and communication are complex, the control effect of a control program is influenced, and the interference is easily caused. Based on this, there is a need to develop a device for a tracking type quantum magnetometer, which has better transportability and stronger stability and can realize real-time tracking of larmor frequency.
Disclosure of Invention
An object of the utility model is to provide a larmor frequency tracking means for tracking formula quantum magnetometer that has better portability and stronger stability to solve the problem that realizes the real-time quick tracking of larmor frequency.
The utility model aims at realizing through the following technical scheme:
a Larmor frequency tracking device for a tracking type quantum magnetometer comprises a controller module 1, a controller crystal oscillator circuit 2, an AD crystal oscillator circuit 3, a power supply module 4, a magnetic resonance signal conditioning module 5, an analog-to-digital conversion module 6, a program downloading module 7, an automatic resetting module 8 and a communication module 9;
the controller crystal oscillator circuit 2, the analog-to-digital conversion module 6, the program downloading module 7, the automatic reset module 8 and the communication module 9 are respectively connected with the controller module 1; the magnetic resonance signal conditioning module 5 is communicated with the controller module 1 and the communication module 9 through the analog-to-digital conversion module 6; the power module 4 is also respectively connected with the controller module 1, the magnetic resonance signal conditioning module 5, the analog-to-digital conversion module 6, the automatic reset module 8 and the communication module 9; the AD crystal oscillator circuit 3 is also connected with an analog-to-digital conversion module 6.
Further, the control module 1 is able to determine the resonance zone and lock the magnetic resonance point.
Further, the crystal oscillation frequency of the controller crystal oscillation circuit 2 is 50MHz.
Further, the analog-to-digital conversion module 6 employs three 24-bit acquisition chips, and is configured to convert the analog signal conditioned by the magnetic resonance signal conditioning module 5 into a digital signal, and perform SPI communication with the ZYNQ7020 controller module 1.
Furthermore, the three acquisition chips use the same crystal oscillator, and the crystal oscillator frequency is 7.68MHz.
Further, the magnetic resonance signal conditioning module 5 is connected with the quantum magnetometer probe, and can convert a photocurrent signal output by the quantum magnetometer probe into a magnetic resonance signal, a fundamental wave signal and a second harmonic signal required by a tracking algorithm, and condition the photocurrent signal into a voltage range suitable for input of a subsequent AD acquisition circuit.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model is used for the Larmor frequency tracking device of tracking formula quantum magnetometer through contrastive analysis, adopts magnetic resonance signal, fundamental wave signal, second harmonic signal data synchronous acquisition, can confirm the resonance region according to the signal characteristic sooner. The utility model is used for the Larmor frequency tracking means of tracking formula quantum magnetometer can realize the real-time tracking of Larmor frequency, has better portability and stronger stability. A ZYNQ7020 controller is adopted to improve the Larmor frequency tracking speed and the hardware stability of the tracking type quantum magnetometer. Meanwhile, the method has stronger portability to other quantum magnetometers.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a block diagram of a Larmor frequency tracking device for a tracking quantum magnetometer of the present invention;
figure 2 the utility model discloses a work flow chart of larmor frequency tracking means for tracking formula quantum magnetometer.
In the figure, 1, a controller module 2, a controller crystal oscillator circuit 3, an AD crystal oscillator circuit 4, a power supply module 5, a magnetic resonance signal conditioning module 6, an analog-to-digital conversion module 7, a program downloading module 8, an automatic resetting module 9 and a communication module.
Detailed Description
The invention will be further described with reference to the following examples:
the present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
The existing Larmor frequency tracking device for the tracking type quantum magnetometer has low processing speed of a control execution program and poor hardware stability. In recent years, various heterogeneous FPGAs are rapidly developed, wherein the ZYNQ7020 heterogeneous FPGA is composed of a PS part and a PL part, the PS part is a dual-core ARM Cortex-A9 processing system, and the PL part is the FPGA. The utility model discloses a heterogeneous FPGA of ZYNQ7020, wherein dual-core ARM Cortex-A9 processing system handles logic control instruction and data processing, and FPGA carries out locking program, has improved procedure execution efficiency greatly, has improved control program's execution efficiency and hardware stability.
As shown in fig. 1, the larmor frequency tracking device for the tracking type quantum magnetometer of the present invention comprises a controller module 1, a controller crystal oscillator circuit 2, an AD crystal oscillator circuit 3, a power module 4, a magnetic resonance signal conditioning module 5, an analog-to-digital conversion module 6, a program downloading module 7, an automatic reset module 8 and a communication module 9;
the controller crystal oscillator circuit 2, the analog-to-digital conversion module 6, the program downloading module 7, the automatic reset module 8 and the communication module 9 are respectively connected with the controller module 1; the magnetic resonance signal conditioning module 5 is communicated with the controller module 1 and the communication module 9 through the analog-to-digital conversion module 6; the power module 4 is also respectively connected with the controller module 1, the magnetic resonance signal conditioning module 5, the analog-to-digital conversion module 6, the automatic reset module 8 and the communication module 9; the AD crystal oscillator circuit 3 is also connected with an analog-to-digital conversion module 6.
The utility model is used for Larmor frequency tracking means of tracking formula quantum magnetometer to controller module 1 is control core, provides 3 data acquisition passageways and gathers 5 output signal of magnetic resonance conditioning module in real time, and utilizes harmonic signal characteristic to judge the resonance region fast and utilize PID algorithm real-time tracking locking Larmor frequency, passes to the host computer on the data that come with gathering through communication module 9.
The controller module 1 is an FPGA controller module 1, and ZYNQ7020 with large memory capacity is adopted. And determining a resonance area by using the acquired harmonic characteristics, and locking a magnetic resonance point by using a PID algorithm. An RS485 communication interface is arranged at an external leading-out port of the acquisition device and is in data communication with an upper computer through a serial port and a communication module 9.
The automatic reset module 8 selects MAX811T to perform power-on reset on the controller module 1.
The controller crystal frequency of the controller crystal oscillator circuit 2 is 50MHz, and is used for providing a clock frequency of 50MHz for the controller module 1.
The program downloading module 7 is used for downloading data to the controller module 1.
The analog-digital conversion module 6 adopts three 24-bit ADS1256 acquisition chips to realize three-channel synchronous acquisition for the tracking type quantum magnetometer, digitalizes the analog signals conditioned by the magnetic resonance signal conditioning module 5, and communicates with the controller module 1 through the SPI bus. The same crystal oscillator is used for the three acquisition chips, so that the analog-to-digital conversion synchronization of the three acquisition chips can be ensured, and the crystal oscillator frequency is 7.68MHz.
The magnetic resonance signal conditioning module 5 is connected with the quantum magnetometer probe, can convert a photocurrent signal output by the quantum magnetometer probe into a magnetic resonance signal, a fundamental wave signal and a second harmonic signal required by a tracking algorithm, and conditions the photocurrent signal into a voltage range suitable for input of a subsequent AD acquisition circuit.
The power supply module 4 in fig. 1 mainly includes: the +12V to +5V is used for supplying power to the analog working voltage and the communication module of the acquisition chip, the +5V to AD _2.5V voltage is supplied to the reference voltage of the acquisition chip, the +5V to +3.3V is used for supplying power to the controller module 1, the analog-to-digital conversion module 6 and the automatic reset module 8, and the +/-12V to +/-8V is used for supplying working voltage to an operational amplifier circuit, a filter circuit and a phase-locked amplification circuit in the magnetic resonance signal conditioning module 5.
The magnetic resonance signal conditioning module 9 converts a photocurrent signal output by the quantum magnetometer probe into a magnetic resonance signal, a fundamental wave signal and a second harmonic signal required by a tracking algorithm, conditions the photocurrent signal into a voltage range suitable for input of a subsequent AD acquisition circuit, converts three analog signals into digital signals through three acquisition chips, reads the converted digital quantity through an SPI bus by the ZYNQ7020 controller module 1, and finally uploads data through a 485 bus when an upper computer inquires data.
The utility model discloses a larmor frequency tracking device for tracking formula quantum magnetometer uses three collection chips, cooperates with same crystal oscillator circuit, carries and realizes the synchronous collection to resonance signal, fundamental wave signal and second harmonic signal on same SPI bus; the controller utilizes near magnetic resonance point, and fundamental wave signal amplitude is close to zero, and the second harmonic signal amplitude is kept away from zero and is confirmed the magnetic resonance district fast, and in the magnetic resonance district, execution PID procedure can accelerate larmor frequency locking speed under the complex environment, improves the bandwidth and the stability of quantum magnetometer, makes the magnetic field measurement of tracking formula quantum magnetometer more being applicable to in the complex environment.
The working process is as shown in figure 2:
1. the signal sources for the collected data are: when the tracking type quantum magnetometer works, a weak changing photocurrent is output due to the change of the surrounding magnetic field, and the photocurrent signal is converted into a magnetic resonance signal, a fundamental wave signal and a second harmonic signal through the magnetic resonance signal conditioning module circuit in fig. 1, so that a resonance area is searched for and the larmor frequency is locked.
2. Magnetic resonance signals, fundamental wave signals and second harmonic signals output by a photovoltaic circuit, a phase-locked amplifying circuit and a filter circuit in the magnetic resonance signal conditioning module 5 circuit are transmitted into a three-channel analog-to-digital conversion circuit for conversion.
3. After data acquisition in ADS1256, according to the larmor frequency neighborhood. And judging whether the fundamental wave signal is close to zero or not according to the characteristic that the second harmonic wave signal is far from zero.
4. When the controller is in the range of the resonance area, a PID program is executed on the fundamental wave signal, the fundamental wave signal is locked to zero, the corresponding frequency is the Larmor frequency, and the execution efficiency and the stability of the controller are improved by adopting the ZYNQ heterogeneous FPGA.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (6)
1. A larmor frequency tracking device for a tracking quantum magnetometer, characterized by: the system comprises a controller module (1), a controller crystal oscillator circuit (2), an AD crystal oscillator circuit (3), a power supply module (4), a magnetic resonance signal conditioning module (5), an analog-to-digital conversion module (6), a program downloading module (7), an automatic reset module (8) and a communication module (9);
the controller crystal oscillator circuit (2), the analog-to-digital conversion module (6), the program downloading module (7), the automatic reset module (8) and the communication module (9) are respectively connected with the controller module (1); the magnetic resonance signal conditioning module (5) is communicated with the controller module (1) and the communication module (9) through the analog-to-digital conversion module (6); the power supply module (4) is also respectively connected with the controller module (1), the magnetic resonance signal conditioning module (5), the analog-to-digital conversion module (6), the automatic reset module (8) and the communication module (9); the AD crystal oscillator circuit (3) is also connected with an analog-to-digital conversion module (6).
2. A larmor frequency tracking device for a tracking quantum magnetometer of claim 1 wherein: the controller module (1) is capable of determining a resonance zone and locking the magnetic resonance point.
3.A larmor frequency tracking device for a tracking quantum magnetometer according to claim 1 wherein: the crystal oscillation frequency of the controller crystal oscillation circuit (2) is 50MHz.
4. A larmor frequency tracking device for a tracking quantum magnetometer of claim 1 wherein: the analog-digital conversion module (6) adopts three 24-bit acquisition chips and is used for converting the analog signals conditioned by the magnetic resonance signal conditioning module (5) into digital signals and carrying out SPI communication with the controller module (1).
5. A Larmor frequency tracking device for a tracking quantum magnetometer, according to claim 4, wherein: the three acquisition chips use the same crystal oscillator, and the frequency of the crystal oscillator is 7.68MHz.
6. A larmor frequency tracking device for a tracking quantum magnetometer of claim 1 wherein: the magnetic resonance signal conditioning module (5) is connected with the quantum magnetometer probe, and can convert a photocurrent signal output by the quantum magnetometer probe into a magnetic resonance signal, a fundamental wave signal and a second harmonic signal required by a tracking algorithm and condition the photocurrent signal into a voltage range suitable for input of a subsequent AD acquisition circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222093249.4U CN218567633U (en) | 2022-08-10 | 2022-08-10 | Larmor frequency tracking device for tracking type quantum magnetometer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222093249.4U CN218567633U (en) | 2022-08-10 | 2022-08-10 | Larmor frequency tracking device for tracking type quantum magnetometer |
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| CN202222093249.4U Expired - Fee Related CN218567633U (en) | 2022-08-10 | 2022-08-10 | Larmor frequency tracking device for tracking type quantum magnetometer |
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- 2022-08-10 CN CN202222093249.4U patent/CN218567633U/en not_active Expired - Fee Related
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