Direct current proportion device monitoring method based on diamond NV color center

Abstract

The invention relates to a direct current proportion device monitoring method based on a diamond NV color center, and the method comprises the steps: enabling a to-be-measured direct current # imgabs0 # to generate a magnetic potential # imgabs2 # in a primary coil with the number of turns # imgabs1 # of a direct current proportion device, measuring the magnetic field intensity in an iron core of the direct current proportion device through a measurement probe in a diamond NV color center magnetic field measurement system, and outputting an analog electric signal B; a control signal V is output after conversion of the control module; a control signal # imgabs3 # is input into the DAC module, and the DAC module is controlled to output a current # imgabs4 # '; the current # imgabs5 # 'passes through a current amplification module and is output as feedback current # imgabs6 #, the feedback current # imgabs6 # enters a secondary coil with the number of turns # imgabs7 # of a proportional device, and a magnetic potential # imgabs8 # opposite to the magnetic potential direction of the primary coil is generated; the magnetic field measured by the diamond NV color center magnetic field measurement system is reduced, the feedback current is increased, and the magnetic flux of the iron core is reduced until the magnetic flux in the iron core is zero, and the ampere-turn balance state is achieved. The scheme is based on the diamond NV color center, has excellent measurement precision, and can realize high-precision and high-speed measurement and proportion tracking of the current to be measured.

Description

Technical Field

[0001] The present invention relates to the technical field of quantum precision measurement, and particularly relates to a monitoring method for a DC current ratio device based on diamond NV color centers. Background Art

[0002] Currently, it is a period of transition from traditional metrology to quantum metrology. Quantum precision measurement utilizes the interaction between magnetism, light, and atoms to achieve measurement accuracy beyond classical methods, greatly improving measurement performance. When an external magnetic field acts on diamond NV color centers, energy level splitting occurs, and using this to monitor the intensity and changes of the external magnetic field greatly improves the sensitivity and resolution of magnetic field measurement.

[0003] In the process of achieving ampere-turn balance, traditional current measurement methods have high requirements for the measurement environment, often requiring a long time to reach a stable balance state, and their feedback adjustment process is slow, with a long response time for rapidly changing DC current signals, making it difficult to track and measure in real time and accurately, resulting in failure to meet requirements in some application scenarios that require rapid response. Summary of the Invention

[0004] In order to improve the measurement accuracy of existing DC current ratio devices, the present application provides a monitoring method for a DC current ratio device based on diamond NV color centers.

[0005] The technical solution of the present invention provides a monitoring method for a DC current ratio device based on diamond NV color centers, including the following steps: S1. DC current to be measured In a primary coil with a turn number of of the DC ratio device, a magnetic potential is generated, and the magnetic flux generated by the primary coil in the iron core at this time is ; S2. A measurement probe in the diamond NV color center magnetic field measurement system measures the magnetic field strength in the iron core of the DC ratio device and outputs an analog electrical signal ∆B; S3. The analog electrical signal ∆B is converted by a control module and then outputs a control signal ∆V; S4. The control signal is input to a DAC module to control the DAC module to output a current '; S5. The current ' passes through a current amplification module and outputs a feedback current , which enters a secondary coil with a turn number of of the ratio device to generate a magnetic potential in the direction opposite to that of the magnetic potential of the primary coil; S6. The secondary coil generates a magnetic flux in the iron core, and the magnetic flux is opposite to the direction and they cancel each other out. The magnetic field measured by the diamond NV center magnetic field measurement system decreases, the feedback current increases, and the magnetic flux of the iron core decreases until the magnetic flux in the iron core is zero, reaching the ampere-turn balance state.

[0006] Preferably, the diamond NV center magnetic field measurement system monitors the magnitude of the magnetic field in the iron core of the DC current ratio device and transmits the magnitude of the magnetic field to the control module in the form of binary digits.

[0007] Preferably, in the diamond NV center magnetic field measurement system, the measurement probe is placed in the magnetic field environment to be measured, causing Zeeman splitting of the diamond NV center, and a 532 nm laser source is used to irradiate the diamond NV center sample on the microwave antenna to excite red fluorescence, completing the initialization of the measurement.

[0008] Preferably, the control module is based on a programmable logic gate array with an ADC, and converts the analog electrical signal into a control signal according to the mapping relationship after conversion by the ADC .

[0009] Preferably, the control module uses the PID algorithm to enable the control signal to respond quickly to the change of the analog electrical signal .

[0010] Preferably, the DAC module is electrically connected in communication with the programmable logic gate array. The programmable logic gate array powers the DAC module and communicates with it. After receiving the signal , the DAC module can accurately output the corresponding current '.

[0011] Preferably, the current amplification module is a current amplifier, which amplifies the current ' into a feedback current and inputs it to the secondary coil.

[0012] The monitoring method of the DC current ratio device based on diamond NV centers of the present application is a method based on diamond NV centers for accurately measuring the magnetic field strength of the iron core in the DC ratio device and then generating a feedback current to achieve ampere-turn balance. Diamond itself is not easily affected by capacitive and magnetic errors and outputs accurate and consistent measurement results. Therefore, it has excellent measurement accuracy and can achieve high-precision and high-speed measurement and ratio tracking of the current to be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the quantum magnetic balance monitoring of the DC current ratio device according to the embodiment of the present invention.

[0014] Figure 2 Schematic diagram of the structure of the diamond NV center probe according to the embodiment of the present invention.

[0015] In the figure 1: The magnetic potential generated by the primary coil of the DC current to be measured, 2: Diamond NV center probe, 3: Control module, 4: DAC module, 5: Current amplification module, 6: 532 nm laser, 7: Photoelectric detector, 8: Fluorescence collection lens, 9: Detection filter, 10: Dichroic mirror, 11: Objective lens, 12: Microwave antenna, 13: Diamond NV center sample. Specific embodiments

[0016] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. In this specification, the size ratio of the drawings does not represent the actual size ratio. It is only used to reflect the relative positional relationship and connection relationship between components. Components with the same name or the same reference numeral represent similar or the same structures, and are for illustrative purposes only.

[0017] Figure 1 Schematic diagram of the monitoring method of the DC current ratio device based on the diamond NV center of the present invention. The method includes the following steps: S1. DC current to be measured In the primary coil with the number of turns of the DC ratio device being a magnetic potential is generated , and the magnetic flux generated by the primary coil in the iron core at this time is ; S2. The measurement probe in the diamond NV center magnetic field measurement system measures the magnetic field strength in the iron core of the DC ratio device and outputs an analog electrical signal ; S3. The analog electrical signal is converted by the control module and then outputs a control signal ; S4. The control signal is input to the DAC module to control the DAC module to output a current '; S5. The current ' is output as a feedback current after passing through the current amplification module, and enters the secondary coil with the number of turns of the ratio device being , generating a magnetic potential in the opposite direction to the magnetic potential of the primary coil; S6. The secondary coil generates a magnetic flux in the iron core, and the magnetic flux and The directions are opposite and cancel each other out. The magnetic field measured by the diamond NV center magnetic field measurement system decreases, the feedback current increases, and the magnetic flux of the iron core decreases until the magnetic flux in the iron core is zero, reaching the ampere-turn balance state.

[0018] One of the DC current ratio systems includes a diamond NV center probe, a control module, a DAC module, and a current amplification module. Figure 2 It is a schematic structural diagram of the diamond NV center probe according to the embodiment of the present invention.

[0019] The diamond NV center probe includes a diamond NV center sample and a 532nm laser source; the control module is used to receive the electrical signal ∆B emitted by the diamond NV center probe and output a control signal ∆V; the DAC module is used to receive the control signal ∆V output by the control module and output a current ; the current amplification module is used to receive the current of the DAC module and amplify the current to and enter the secondary coil.

[0020] The diamond NV center probe includes a microwave antenna, a dichroic mirror, an objective lens, a fluorescence collection lens, a photodetector, and a detection filter; the 532nm laser source emits laser light that is reflected by the dichroic mirror and shines on the objective lens. The objective lens focuses the light on the diamond NV center sample to cause a change in its quantum state and generate a fluorescence signal. Part of the fluorescence signal passes through the objective lens, the dichroic mirror, and the detection filter and is introduced into the fluorescence collection lens. The fluorescence collection lens converges the fluorescence signal filtered by the detection filter and irradiates the photodetector, and then the photodetector converts the collected fluorescence signal into an electrical signal ∆B.

[0021] The control module includes an ADC and an FPGA development board; the analog electrical signal is converted into a digital signal through the ADC in the control module , based on the digital signal , according to the FPGA development board, the digital signal is output as the control signal ∆V through the mapping relationship.

[0022] The DAC module receives the control signal ∆V of the control module and outputs a current '; The current amplification module amplifies the current ' and outputs it as a feedback current , and enters the secondary coil with a turn number of to generate a magnetic potential with a direction opposite to that of the magnetic potential of the primary coil ; In S6, when the ampere-turn balance state is reached, the magnetic field magnitude measured by the diamond NV center magnetic field measurement system is a zero magnetic field, and the DC to be measured Its size is obtained from the following equation:

[0023] wherein and are the magnitudes of the current to be measured and the feedback current respectively, is , is .

[0024] The diamond NV - center quantum magnetic balance monitoring method is a method based on the diamond NV - center, used to accurately measure the magnetic field strength of the iron core in a DC ratio device, and then generate a feedback current to achieve ampere - turn balance. The diamond NV - center is a unique structure containing nitrogen - vacancy defects in the diamond lattice and can be used to measure magnetic fields. When measuring DC currents, it can accurately compare the magnitudes of two or more DC currents and determine the proportional relationship between them. Since diamond itself is not easily affected by capacitive and magnetic errors, it can stably operate in different working environments, output accurate and consistent measurement results, and has high stability and reliability. This enables it to provide reliable data guarantee for users in long - term measurement and monitoring applications, reducing risks caused by measurement errors and instrument instability. This method can accurately and quickly respond to application scenarios in real - time, solving the problems of slow feedback regulation process and long response time in current technologies.

[0025] The solution of the present invention breaks through the limitations of traditional magnetic field measurement and current generation methods. Based on solid - state quantum spins, relying on the Zeeman splitting of diamond NV - centers in a magnetic field environment, the magnetic field strength to be measured is converted into an electrical signal through devices such as a 532 - nm laser, a microwave source, and a photodetector, and then the current is output through a control module, a DAC module, and a current amplification module. The output current flows into the secondary coil to weaken the magnetic field to be measured, and finally the current to be measured is deduced by ampere - turn balance. The method of the present invention can achieve high - precision and high - speed measurement and proportional tracking of the current to be measured, is not easily affected by capacitive and magnetic errors, can stably operate in different working environments, output accurate and consistent measurement results, and has high stability and reliability.

[0026] The above content is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A monitoring method for a DC current proportional device based on diamond NV color centers, characterized in that Including the following steps: S1. DC current to be measured In the DC proportional device, when the number of turns of the primary coil is the magnetomotive force generated in the primary coil is , and the magnetic flux generated by the primary coil in the iron core at this time is ; S2. The measuring probe in the diamond NV center magnetic field measurement system measures the magnetic field strength in the iron core of the DC proportional device and outputs an analog electrical signal ΔB; S3. The analog electrical signal ΔB is converted by the control module and outputs a control signal ΔV; S4. Control signal is input to the DAC module to control the current output of the DAC module '; S5. Current ' is output as a feedback current through the current amplification module , and enters the secondary coil with a number of turns of , generating a magnetic potential opposite to the magnetic potential direction of the primary coil ; S6. The secondary coil generates magnetic flux in the iron core , and the magnetic flux is in the opposite direction to and cancels each other out. The magnetic field measured by the diamond NV center magnetic field measurement system decreases, the feedback current increases, and the magnetic flux in the iron core decreases until the magnetic flux in the iron core becomes zero, reaching the ampere-turn balance state.

2. The diamond NV center quantum magnetic balance monitoring method applied to a DC current ratio device according to claim 1, characterized in that, The diamond NV center magnetic field measurement system monitors the magnitude of the magnetic field in the iron core of the DC current proportional device and transmits the magnitude of the magnetic field in the form of binary digits to the control module.

3. A diamond NV color center quantum magnetic balance monitoring method applied to a DC current ratio device according to claim 1, characterized in that, In the diamond NV center magnetic field measurement system, the measuring probe is placed in the magnetic field environment to be measured, causing Zeeman splitting of the diamond NV center, and a 532 nm laser source is used to irradiate the diamond NV center sample on the microwave antenna to excite red fluorescence, completing the initialization of the measurement.

4. A diamond NV color center quantum magnetic balance monitoring method applied to a DC current ratio device according to claim 1, characterized in that, The control module is based on a programmable logic gate array with an ADC, and converts the analog electrical signal into a control signal according to the mapping relationship after conversion by the ADC .

5. A diamond NV color center quantum magnetic balance monitoring method applied to a DC current ratio device according to claim 1, characterized in that, The control module uses the PID algorithm to make the control signal capable of quickly responding to the change of the analog electrical signal .

6. The diamond NV color center quantum magnetic balance monitoring method applied to a DC current ratio device according to claim 4, wherein The DAC module is electrically connected in communication with the programmable logic gate array. The programmable logic gate array supplies power to the DAC module and communicates with it. After receiving the signal the DAC module can accurately output the corresponding current ’.

7. A diamond NV color center quantum magnetic balance monitoring method applied to a DC current proportional device according to claim 1, characterized in that The current amplification module is a current amplifier that amplifies the current ' to a feedback current and inputs it to the secondary coil.

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