NV color center magnetic measurement device, magnetic measurement method and storage medium based on host computer

Abstract

The present invention discloses a NV color center magnetic measurement device based on a host computer, a magnetic measurement method, and a storage medium, wherein the magnetic measurement device includes a measuring piece, a light source component, a control component, a signal acquisition component, and a host computer, wherein the measuring piece includes an NV color center; the light source component is used to generate a control laser so that the NV color center generates fluorescence; the control component is used to provide a control field to change the fluorescence intensity of the NV color center; the signal acquisition component is used to collect the fluorescence signal of the NV color center; the host computer is connected to the control component and the signal acquisition component respectively, and when the measuring piece is placed in a magnetic field to be measured, the control component is controlled to provide a control field of a specific frequency for the measuring piece, and obtain a fluorescence signal, and calculate the magnetic field strength of the magnetic field to be measured and adjust the specific frequency according to the fluorescence signal, until the fluorescence signal meets a preset condition. Thus, the magnetic measurement device can improve the accuracy of magnetic measurement, increase the measurement range of the magnetic field, and can quickly measure the magnetic field strength with a large range of variation.

Description

Technical Field

[0001] The present invention relates to the field of measurement technology, and in particular to an NV color center magnetic measurement device based on a host computer, a magnetic measurement method and a computer-readable storage medium. Background Art

[0002] Magnetic field measurement is widely used in the fields of earth and space physics, military technology, biology and medicine, industry, etc., playing an important role and becoming an indispensable measurement method in the contemporary era. There are many types of sensors used for magnetic field measurement in related technologies, mainly including fluxgate sensors, detection coil sensors, Hall sensors, magnetoresistive sensors, giant magnetoimpedance magnetic sensors, etc.

[0003] In recent years, the rapid development of quantum information processing methods based on solid-state spins has brought new technological updates and promoted the development of solid-state spin sensor technology. With its high spatial resolution and high sensitivity, as well as good scalability and easy control, solid-state spin systems have become a hot topic of research.

[0004] In the related art, solid-state spin magnetic sensors measure magnetic field strength by pulsed magnetic measurement: when the electron spin is in a superposition state, the external magnetic field will cause the relative phase to be accumulated on different basis vectors. Therefore, the system is first prepared to a superposition state, and then allowed to evolve freely under an external magnetic field or controlled by a laser or microwave pulse sequence. At this time, the superposition state of the system will accumulate relative phases. Finally, the relative phase is mapped to the occupancy, and the signal is read out to obtain the magnetic field information. Since the intensity of the read signal changes periodically with the relative phase, it can only be measured within a certain relative phase range, and the relative phase is affected by the external magnetic field strength and the measurement time. The measurement time is limited by the system relaxation time, so the measurable external magnetic field strength cannot reach a larger range due to the limitation of the system relaxation time. The dynamic range of this measurement method is low, and it is impossible to perform more accurate magnetic field measurements, and it is not suitable for magnetic fields with large changes. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, one object of the present invention is to provide an NV color center magnetic measurement device based on a host computer, which can improve the accuracy of magnetic measurement, increase the measurement range of the magnetic field, and can quickly measure the magnetic field strength with a large variation range.

[0006] The second object of the present invention is to provide a magnetic measurement method.

[0007] A third object of the present invention is to provide a computer-readable storage medium.

[0008] To achieve the above-mentioned purpose, the first aspect of the present invention proposes an NV color center magnetic measurement device based on a host computer, wherein the magnetic measurement device includes: a measuring piece, the measuring piece includes an NV color center; a light source assembly, the light source assembly is used to generate a control laser for irradiating the measuring piece to make the NV color center generate fluorescence; a control assembly, the control assembly is used to provide a control field for the measuring piece to change the fluorescence intensity of the NV color center; a signal acquisition assembly, the signal acquisition assembly is used to collect the fluorescence signal of the NV color center; a host computer, the host computer is respectively connected to the control assembly and the signal acquisition assembly, the host computer is used to control the control assembly to provide the measuring piece with a control field of a specific frequency when the measuring piece is placed in the magnetic field to be measured, and obtain the fluorescence signal, and calculate the magnetic field strength of the magnetic field to be measured and adjust the specific frequency according to the fluorescence signal until the fluorescence signal meets preset conditions.

[0009] The magnetic measurement device of the embodiment of the present invention includes a measuring part, a light source component, a control component, a signal acquisition component and a host computer, wherein the measuring part includes an NV color center, the measuring part is first placed in the magnetic field to be measured, and then the control laser generated by the light source component is irradiated on the light source component to make the NV color center generate fluorescence, the control component generates a control field with a specific frequency and adds it to the NV color center, and then the fluorescence signal of the NV color center is collected by the signal acquisition component, the host computer calculates the magnetic field strength according to the fluorescence signal, and adjusts the specific frequency of the control field generated by the control component, and then adds the adjusted control field to the NV color center to change the fluorescence intensity of the NV color center until the fluorescence signal meets the preset conditions. Thus, the magnetic measurement device can improve the accuracy of magnetic measurement, increase the measurement range of the magnetic field, and can quickly measure the magnetic field strength with a large range of variation.

[0010] In some examples of the present invention, the host computer adjusts the specific frequency according to the fluorescence signal until the fluorescence signal meets a preset condition, and is specifically used to: obtain the difference between the specific frequency and the current resonant frequency under the magnetic field to be measured according to the fluorescence signal; and adjust the specific frequency according to the difference until the difference is less than a preset difference threshold.

[0011] In some examples of the present invention, the light source assembly includes a laser and a lens, and the lens is used to collimate and focus the laser light generated by the laser to form the control laser light and irradiate the control laser light to a preset position of the measuring piece.

[0012] In some examples of the present invention, the wavelength of the laser generated by the laser is 532 nm.

[0013] In some examples of the present invention, the control component includes: a microwave source, which is connected to the host computer and is used to generate microwaves of a specific frequency under the control of the host computer; a power amplifier, which is used to amplify the microwaves to obtain the control field; and a radiating element, which is used to apply the control field to the measuring element.

[0014] In some examples of the present invention, the signal acquisition device includes: a fluorescence collector, which is used to collect the fluorescence signal; a photodetector, which is used to convert the fluorescence signal into an electrical signal; an analog-to-digital converter, which is connected to the host computer, and is used to convert the electrical signal into a digital signal and upload it to the host computer.

[0015] In some examples of the present invention, the measuring member is a diamond block.

[0016] To achieve the above-mentioned purpose, the second aspect of the present invention proposes a magnetic measurement method, which is used in the NV color center magnetic measurement device based on the host computer as described in the above-mentioned embodiment, and the magnetic measurement method includes the following steps: when the measuring piece is placed in the magnetic field to be measured, controlling the control component to provide a control field of a specific frequency for the measuring piece; obtaining the fluorescence signal; calculating the magnetic field strength of the magnetic field to be measured and adjusting the specific frequency according to the fluorescence signal; the control component provides the measuring piece with an adjusted control field of the specific frequency, and returns to the step of obtaining the fluorescence signal until the fluorescence signal meets a preset condition.

[0017] The embodiment of the present invention first places the measuring piece in the magnetic field to be measured, then controls the control component to provide the measuring piece with a control field with a specific frequency, then obtains the fluorescence signal of the measuring piece, and then calculates the magnetic field strength of the magnetic field to be measured according to the fluorescence signal, and adjusts the specific frequency, and the control component provides the measuring piece with the adjusted control field of the specific frequency, and then re-acquires the fluorescence signal until the fluorescence signal meets the preset conditions. Therefore, the magnetic measurement method can improve the accuracy of magnetic measurement, increase the measurement range of the magnetic field, and can quickly measure the magnetic field strength with a large range of changes.

[0018] In some examples of the present invention, the specific frequency is calculated and adjusted according to the fluorescence signal, including: obtaining the difference between the specific frequency and the current resonant frequency under the magnetic field to be measured according to the fluorescence signal, and adjusting the specific frequency according to the difference; the fluorescence signal satisfies a preset condition, including: the difference is less than a preset difference threshold.

[0019] To achieve the above objectives, a third aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the magnetic measurement method as described in the above embodiments is implemented.

[0020] The computer-readable storage medium of the embodiment of the present invention can implement the magnetic measurement method in the above embodiment by executing the computer program stored thereon, thereby improving the accuracy of magnetic measurement, increasing the measurement range of the magnetic field, and being able to quickly measure the magnetic field strength with a large variation range.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural block diagram of an NV color center magnetic measurement device based on a host computer according to an embodiment of the present invention;

[0023] Figure 2 is a structural block diagram of a light source assembly according to a specific embodiment of the present invention;

[0024] Figure 3 is a structural block diagram of an NV color center magnetic measurement device based on a host computer according to another embodiment of the present invention;

[0025] Figure 4 It is a structural block diagram of an NV color center magnetic measurement device based on a host computer according to another embodiment of the present invention;

[0026] Figure 5 is a flow chart of a magnetic measurement method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] The following describes the NV color center magnetic measurement device, magnetic measurement method, and storage medium based on a host computer according to an embodiment of the present invention with reference to the accompanying drawings.

[0029] Figure 1 It is a structural block diagram of an NV color center magnetic measurement device based on a host computer according to an embodiment of the present invention.

[0030] In this embodiment, if Figure 1As shown, the NV color center magnetic measurement device 100 based on the host computer includes a measuring component 10, a light source component 20, a control component 30, a signal acquisition component 40 and a host computer 50.

[0031] Among them, the measuring piece 10 includes an NV color center 101; the light source component 20 is used to generate a control laser to irradiate the measuring piece 10 so that the NV color center 101 generates fluorescence; the control component 30 is used to provide a control field for the measuring piece 10 to change the fluorescence intensity of the NV color center 101; the signal acquisition component 40 is used to collect the fluorescence signal of the NV color center 101; the host computer 50 is connected to the control component 30 and the signal acquisition component 40 respectively, and the host computer 50 is used to control the control component 30 to provide a control field of a specific frequency for the measuring piece 10 when the measuring piece 10 is placed in the magnetic field to be measured, and to obtain the fluorescence signal, as well as to calculate the magnetic field strength of the magnetic field to be measured and adjust the specific frequency according to the fluorescence signal until the fluorescence signal meets the preset conditions.

[0032] First of all, it should be explained that the Zeeman splitting between the electron energy levels of the electrons in the magnetically sensitive units (such as NV color centers) is different under the influence of external magnetic fields of different intensities. By continuously exciting the electrons through the manipulation field and the manipulation laser, the spin of the system can be made to reach a state of equilibrium. The spin occupancy of the system is affected by the external magnetic field. Therefore, a fluorescence signal whose intensity varies with the spin occupancy of the system can be obtained. Depending on the strength of the external magnetic field, fluorescence signals of different intensities can be obtained.

[0033] Specifically, in this embodiment, the measuring piece 10 is first placed in the magnetic field to be measured, and then a control field is provided to the measuring piece 10 through the control component 30. It should be noted that when the control component 30 provides the first control field to the measuring piece 10, the frequency of the first control field can be a preset frequency. It should be noted that the preset frequency can be a fixed value set by the user, such as 1kHz, or it can be an estimate of the magnetic field to be measured based on the user's experience. For example, if the user estimates that the frequency of the magnetic field to be measured is between 50Hz and 100Hz, then the preset frequency can be set to 75Hz, that is, the median value of the range. After the control component 30 emits a control field of a preset frequency, the control laser generated by the light source component 20 is irradiated onto the measuring piece 10, so that the NV color center 101 can generate fluorescence. It should be noted that control fields of different frequencies can change the fluorescence intensity of the NV color center 101. In addition, since both the control field and the control laser need to be added to the measuring piece 10 when performing magnetic measurement on the magnetic field to be measured, the order in which the control field and the control laser are added to the measuring piece 10 is not limited herein, that is, the control field can be added to the measuring piece 10 first and then the control laser is added, or the control laser can be added to the measuring piece 10 first and then the control field is added.

[0034] In some examples of the present invention, Figure 2As shown, the light source assembly 20 includes a laser 201 and a lens 202 . The lens 202 is used to collimate and focus the laser light generated by the laser 201 to form a controlled laser light, and irradiate the controlled laser light to a preset position of the measuring piece 10 .

[0035] Specifically, Figure 2 As shown, the light signal emitted by the laser 201 can be processed by the lens 202 to form a control laser. Optionally, the wavelength of the laser generated by the laser 201 is 532nm, and the lens 202 performs collimation and focusing processing on the laser to form a control laser, which is irradiated on the preset position of the measuring member 10, so that the NV color center 101 set on the measuring member 10 can generate a fluorescence signal. It can be understood that the preset position of the measuring member 10 can be set according to the specific position of the NV color center 101.

[0036] In some examples of the present invention, the measuring piece is a diamond block. Optionally, the measuring piece 10 may be a diamond block having an NV color center (nitrogen-vacancy defect). Specifically, a diamond substrate may be used, and ion implantation is performed on the diamond substrate, and annealing is performed in a vacuum environment, thereby forming an NV color center in the diamond substrate. More specifically, a high-purity diamond is used as a substrate, and annealing is performed at a set temperature, so that a certain concentration of NV color centers will be formed in the diamond, and the NV color center can be used to measure the magnetic field. The NV color center is composed of a nitrogen defect and an adjacent hole, and the distance between the two is the CC bond length in the diamond. The scale itself is very small. When measuring through the NV color center, the NV color center has extremely high spatial resolution and detection sensitivity.

[0037] After the control field and the control laser are added to the measuring piece 10 in the magnetic field to be measured, the fluorescence signal of the NV color center 101 is collected by the signal acquisition component 40, and then the host computer 50 obtains the fluorescence signal, and calculates the magnetic field strength of the magnetic field to be measured based on the fluorescence signal, and adjusts the specific frequency emitted by the control component 30, and then the adjusted specific frequency is added to the measuring piece 10, and the fluorescence signal is re-acquired, and the magnetic field strength of the magnetic field to be measured is calculated and the specific frequency is adjusted based on the re-acquired fluorescence signal until the fluorescence signal meets the preset conditions, and then the magnetic field strength of the magnetic field to be measured is calculated through the fluorescence signal that meets the preset conditions.

[0038] In some examples of the present invention, when the upper computer 50 adjusts a specific frequency according to the fluorescence signal until the fluorescence signal meets a preset condition, it specifically includes: obtaining the difference between the specific frequency and the current resonant frequency under the magnetic field to be measured according to the fluorescence signal; and adjusting the specific frequency according to the difference until the difference is less than a preset difference threshold.

[0039] Specifically, the host computer 50 can calculate the frequency of the magnetic field to be measured according to the current fluorescence signal, and then adjust the specific frequency according to the difference between the frequency of the magnetic field to be measured and the current resonance frequency, so that the adjusted difference is less than the preset difference threshold. It can be understood that the preset difference threshold can be set according to the calculation accuracy, and the smaller the preset difference threshold, the higher the accuracy, and the larger the preset difference threshold, the lower the accuracy. In addition, it should be noted that when the specific frequency matches the frequency of the magnetic field to be measured, the fluorescence intensity of the NV color center 101 will decrease; and when the current specific frequency does not completely match the frequency of the magnetic field to be measured, the fluorescence intensity of the NV color center 101 is only partially reduced. Therefore, it is also possible to judge whether the specific frequency matches the current magnetic field to be measured based on the degree of reduction in fluorescence intensity.

[0040] In some examples of the present invention, the manipulation component 30 includes a microwave source 301 , a power amplifier 302 , and a radiation element 303 .

[0041] Among them, the microwave source 301 is connected to the host computer 50 and is used to generate microwaves of a specific frequency under the control of the host computer 50; the power amplifier 302 is used to amplify the microwaves to obtain a control field; and the radiation element 303 is used to apply the control field to the measuring element 10.

[0042] Specifically, Figure 3 As shown, the control component 30 is connected to the host computer 50 and the measuring piece 10 respectively. More specifically, the microwave source 301 arranged in the control component 30 is connected to the host computer 50, and the radiation element 303 arranged in the control component 30 is connected to the measuring piece 10. After the host computer 50 controls the microwave source 301 to generate a microwave with a specific frequency, the microwave source 301 generates microwaves of a specific frequency and then sends the microwaves to the power amplifier 302. The radiation element 303 obtains the amplified microwaves from the power amplifier 302 and applies the microwaves to the measuring piece 10, thereby controlling the fluorescence intensity of the NV color center 101 in the measuring piece 10.

[0043] In some examples of the present invention, Figure 4 As shown, the signal collection device 40 includes a fluorescence collector 401 , a photodetector 402 and an analog-to-digital converter 403 .

[0044] Among them, the fluorescence collector 401 is used to collect fluorescence signals; the photodetector 402 is used to convert fluorescence signals into electrical signals; the analog-to-digital converter 403 is connected to the host computer 50, and the analog-to-digital converter 403 is used to convert electrical signals into digital signals and upload them to the host computer 50.

[0045] Specifically, Figure 4As shown, the measuring device 10 is connected to the fluorescence collector 401 in the signal collection component 40, so that the fluorescence collector 401 can collect the fluorescence intensity signal of the NV color center from the measuring device 10, and then transmit the collected fluorescence signal to the photoelectric detector 402 connected thereto, the photoelectric detector 402 can detect the electrical signal corresponding to the fluorescence signal according to the fluorescence signal, and then convert the electrical signal into a digital signal through the analog-to-digital converter 403 and transmit it to the host computer 50, after receiving the digital signal, the host computer 50 analyzes and processes the digital signal to obtain the fluorescence signal, calculates the magnetic field strength of the magnetic field to be measured according to the fluorescence signal, and then controls the microwave source 301 in the control component according to the calculation result to generate microwaves of a specific frequency, repeats the steps in the above example until the fluorescence signal received by the host computer 50 meets the preset conditions, and then calculates the magnetic field strength of the magnetic field to be measured according to the fluorescence signal that meets the conditions, thereby completing the measurement of the magnetic field to be measured.

[0046] It should be noted that when the magnetic field strength changes, the fluorescence intensity of the NV color center will also change accordingly, so that the stability of the magnetic field can be obtained based on the fluorescence intensity of the NV color center. When the magnetic field changes, the host computer can quickly re-measure the magnetic field through the steps in the above embodiment to obtain a new magnetic field strength.

[0047] In summary, the NV color center magnetic measurement device based on the host computer in the embodiment of the present invention can improve the accuracy of magnetic measurement, increase the measurement range of the magnetic field, and can quickly measure the magnetic field strength with a large variation range.

[0048] Figure 5 is a flow chart of a magnetic measurement method according to an embodiment of the present invention.

[0049] Further, based on the NV color center magnetic measurement device based on the host computer in the above embodiment, the present invention proposes a magnetic measurement method, which is used for the magnetic measurement device in the above embodiment, such as Figure 5 As shown, the magnetic measurement method comprises the following steps:

[0050] S10, when the measuring piece is placed in the magnetic field to be measured, controlling the manipulation component to provide a manipulation field of a specific frequency for the measuring piece.

[0051] Specifically, see Figure 1 and Figure 5In this embodiment, the measuring piece 10 is first placed in the magnetic field to be measured, and then the control component 30 is controlled to provide a control field of a specific frequency for the measuring piece 10. It should be noted that when the control component 30 provides the first control field for the measuring piece 10, the specific frequency of the first control field can be a preset frequency. It should be noted that the preset frequency can be a fixed value set by the user, such as 1kHz, or it can be an estimate of the magnetic field to be measured by the user based on experience. For example, if the user estimates that the frequency of the magnetic field to be measured is between 50Hz and 100Hz, then the preset frequency can be set to 75Hz, that is, the median value of the range.

[0052] S20, acquiring fluorescence signals.

[0053] S30, calculating the magnetic field strength of the magnetic field to be measured according to the fluorescence signal and adjusting the specific frequency.

[0054] S40, the control component provides the measuring element with a control field of an adjusted specific frequency, and returns to the step of obtaining the fluorescence signal until the fluorescence signal meets a preset condition.

[0055] After the manipulation component 30 emits a manipulation field of a preset frequency, the manipulation laser generated by the light source component 20 is irradiated onto the measuring piece 10, so that the NV color center 101 can generate fluorescence. It should be noted that manipulation fields of different frequencies can change the fluorescence intensity of the NV color center 101. In addition, since both the manipulation field and the manipulation laser need to be added to the measuring piece 10 when performing magnetic measurement on the magnetic field to be measured, the order in which the manipulation field and the manipulation laser are added to the measuring piece 10 is not limited here, that is, the manipulation field can be added to the measuring piece 10 first and then the manipulation laser, or the manipulation laser can be added to the measuring piece 10 first and then the manipulation field.

[0056] After the control field and the control laser are added to the measuring piece 10 in the magnetic field to be measured, the fluorescence signal of the NV color center 101 is collected by the signal acquisition component 40, and then the host computer 50 obtains the fluorescence signal, and calculates the magnetic field strength of the magnetic field to be measured based on the fluorescence signal, and adjusts the specific frequency emitted by the control component 30, and then the adjusted specific frequency is added to the measuring piece 10, and the fluorescence signal is re-acquired, and the magnetic field strength of the magnetic field to be measured is calculated and the specific frequency is adjusted based on the re-acquired fluorescence signal until the fluorescence signal meets the preset conditions, and then the magnetic field strength of the magnetic field to be measured is calculated through the fluorescence signal that meets the preset conditions.

[0057] It should be noted that when the magnetic field strength changes, the fluorescence intensity of the NV color center will also change accordingly, so that the stability of the magnetic field can be obtained based on the fluorescence intensity of the NV color center. When the magnetic field changes, the host computer can quickly re-measure the magnetic field through the steps in the above embodiment to obtain a new magnetic field strength.

[0058] In some examples of the present invention, calculating and adjusting a specific frequency based on a fluorescence signal includes: obtaining a difference between the specific frequency and a current resonant frequency under a magnetic field to be measured based on the fluorescence signal, and adjusting the specific frequency based on the difference; the fluorescence signal meeting a preset condition includes: the difference being less than a preset difference threshold.

[0059] Specifically, the host computer can calculate the frequency of the magnetic field to be measured according to the current fluorescence signal, and then adjust the specific frequency according to the difference between the frequency of the magnetic field to be measured and the current resonant frequency, so that the adjusted difference is less than the preset difference threshold. It is understandable that the preset difference threshold can be set according to the calculation accuracy, and the smaller the preset difference threshold, the higher the accuracy, and the larger the preset difference threshold, the lower the accuracy. In addition, it should be noted that when the specific frequency matches the frequency of the magnetic field to be measured, the fluorescence intensity of the NV color center will decrease; and when the current specific frequency does not completely match the frequency of the magnetic field to be measured, the fluorescence intensity of the NV color center is only reduced in part, therefore, it is also possible to judge whether the specific frequency matches the current magnetic field to be measured according to the degree of reduction in fluorescence intensity.

[0060] It should be noted that, for other specific implementation methods of the magnetic measurement method of the embodiment of the present invention, reference may be made to the specific implementation methods of the NV color center magnetic measurement device based on the host computer in the above-mentioned embodiment of the present invention.

[0061] In summary, the magnetic measurement method of the embodiment of the present invention can improve the accuracy of magnetic measurement, increase the measurement range of the magnetic field, and can quickly measure the magnetic field strength with a large variation range.

[0062] Furthermore, the present invention proposes a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the magnetic measurement method in the above embodiment is implemented.

[0063] The computer-readable storage medium of an embodiment of the present invention, when the computer program corresponding to the magnetic measurement method of the above embodiment stored thereon is executed by a processor, can improve the accuracy of magnetic measurement, increase the measurement range of the magnetic field, and can quickly measure the magnetic field strength with a large variation range.

[0064] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0065] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0067] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0068] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0069] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0071] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A NV color center magnetic measurement device based on a host computer, characterized in that: The magnetic measuring device comprises: A measuring piece, wherein the measuring piece includes an NV color center; A light source assembly, the light source assembly is used to generate a control laser to illuminate the measuring member so as to cause the NV color center to generate fluorescence; A manipulation component, the manipulation component is used to provide a manipulation field for the measuring member to change the fluorescence intensity of the NV color center; A signal acquisition component, wherein the signal acquisition component is used to collect the fluorescence signal of the NV color center; A host computer, the host computer is connected to the control component and the signal acquisition component respectively, and the host computer is used to control the control component to provide a control field of a specific frequency for the measuring component when the measuring component is placed in the magnetic field to be measured, and to obtain the fluorescence signal, and to calculate the magnetic field strength of the magnetic field to be measured and adjust the specific frequency according to the fluorescence signal until the fluorescence signal meets a preset condition; The host computer adjusts the specific frequency according to the fluorescent signal until the fluorescent signal meets a preset condition, specifically for: Obtaining a difference between the specific frequency and the current resonance frequency under the magnetic field to be measured according to the fluorescent signal; adjusting the specific frequency according to the difference until the difference is less than a preset difference threshold; The signal acquisition component comprises: A fluorescence collector, which is used to collect the fluorescence signal; A photodetector, the photodetector is used to convert the fluorescence signal into an electrical signal; The analog-to-digital converter is connected to the host computer and is used to convert the electrical signal into a digital signal and upload it to the host computer.

2. The NV color center magnetic measurement device based on the host computer according to claim 1 is characterized in that: The light source assembly includes a laser and a lens. The lens is used to collimate and focus the laser light generated by the laser to form the control laser light and irradiate the control laser light to a preset position of the measuring piece.

3. The NV color center magnetic measurement device based on the host computer according to claim 2 is characterized in that: The wavelength of the laser generated by the laser is 532nm.

4. The NV color center magnetic measurement device based on the host computer according to claim 1 is characterized in that: The control component comprises: A microwave source, connected to the host computer, and used to generate microwaves of a specific frequency under the control of the host computer; A power amplifier, the power amplifier is used to amplify the microwave to obtain the control field; A radiating element, wherein the radiating element is used to apply the control field to the measuring element.

5. The NV color center magnetic measurement device based on the host computer according to claim 1 is characterized in that: The measuring piece is a diamond block.

6. A magnetic measurement method, characterized in that: The magnetic measurement method is used for the NV color center magnetic measurement device based on the host computer according to any one of claims 1 to 5, and the magnetic measurement method comprises the following steps: When the measuring piece is placed in the magnetic field to be measured, controlling the manipulation component to provide a manipulation field of a specific frequency for the measuring piece; Acquiring the fluorescence signal; Calculating the magnetic field strength of the magnetic field to be measured and adjusting the specific frequency according to the fluorescent signal; The control component provides the measuring element with a control field of a specific frequency after adjustment, and returns to the step of obtaining the fluorescence signal until the fluorescence signal meets a preset condition; Calculating and adjusting the specific frequency according to the fluorescence signal comprises: Obtaining a difference between the specific frequency and the current resonance frequency under the magnetic field to be measured according to the fluorescent signal, and adjusting the specific frequency according to the difference; The fluorescent signal meets the preset conditions, including: The difference is less than a preset difference threshold.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the magnetic measurement method according to claim 6 is implemented.

Images