CN114660512A - Magnetic anomaly detection method, medium and equipment based on diamond NV color center probe - Google Patents

Abstract

The invention discloses a magnetic abnormality detection method, medium and equipment based on a diamond NV color center probe. Wherein, the method includes: determining the magnetic measurement direction of the diamond NV color center probe; placing the diamond NV color center probe at the position to be measured, and performing magnetic field measurement at the position to be measured through the diamond NV color center probe according to the magnetic measurement direction to obtain a first measurement result ; Compare the first measurement result with the standard magnetic field model corresponding to the target area, wherein the position to be measured is in the target area; if the first measurement result is consistent with the standard magnetic field model, it is determined that there is no magnetic anomaly in the target area, otherwise the target is determined There is a magnetic anomaly in the area. The method can improve the accuracy of magnetic anomaly detection.

Description

Magnetic anomaly detection method, medium and equipment based on diamond NV color center probe

technical field

The invention relates to the technical field of magnetic field detection, in particular to a magnetic abnormality detection method, medium and equipment based on a diamond NV color center probe.

Background technique

The principle of magnetic anomaly detection is based on the earth's own magnetic field. Although the north and south magnetic poles of the earth's magnetic field move by tens of kilometers every year, and the strength of the earth's magnetic field also changes, due to the large volume of the system involved in the earth's magnetic field, local and In a short period of time, the Earth's magnetic field can be regarded as a relatively stable magnetic field system with relatively stable surface magnetic field gradients. Usually the magnetic field gradient on the earth's surface changes uniformly. When there is a large mass of metal accumulation on the seabed or underground, it will affect the uniformity of the magnetic field gradient on the earth's surface, that is, it shows a magnetic anomaly, which can be used for underground metal deposits as well as seabed wrecks, shipwrecks, Submarines, etc. for detection.

In the related art, the main detection equipment for magnetic anomaly detection is a high-precision fluxgate magnetometer. The specific detection method is mainly to decompose the earth's magnetic field vector, and measure the intensity of the earth's magnetic field and its gradient changes in three axial directions respectively. , and the fluxgate magnetometer can only be used to measure the magnetic field in a single direction, so a three-component probe based on a fluxgate magnetometer is proposed in the prior art to realize the above-mentioned magnetic anomaly detection scheme. The above-mentioned deficiencies in the prior art are: although the fluxgate magnetometer itself has a relatively high resolution, the overall system error of the three-component fluxgate magnetometer is relatively large, and this aspect is due to the mechanical structure of the installation fluxgate. It is difficult to ensure the orthogonality of the three-axis directions, resulting in inaccurate measurement of the magnetic field direction. On the other hand, the excitation signals between multiple fluxgates will interfere with each other and introduce additional noise, resulting in inaccurate measurement of the magnetic field amplitude. certain deficiencies.

SUMMARY OF THE INVENTION

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, the first object of the present invention is to propose a magnetic anomaly detection method based on a diamond NV color center probe, so as to improve the accuracy of magnetic anomaly detection.

A second object of the present invention is to provide a computer-readable storage medium.

The third object of the present invention is to provide an electronic device.

In order to achieve the above-mentioned purpose, the first aspect of the present invention proposes a magnetic anomaly detection method based on a diamond NV color center probe, the method comprising: determining the magnetic measurement direction of the diamond NV color center probe; The core probe is placed at the position to be measured, and the magnetic field measurement is performed on the position to be measured by the diamond NV color core probe according to the magnetic measurement direction to obtain a first measurement result; the first measurement result corresponds to the target area. Standard magnetic field models are compared, wherein the position to be measured is in the target area; if the first measurement result is consistent with the standard magnetic field model, it is determined that there is no magnetic anomaly in the target area, otherwise it is determined that the There is a magnetic anomaly in the target area.

In order to achieve the above object, the second aspect of the present invention proposes a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by the processor, the above-mentioned magnetic field based on the diamond NV color center probe is realized. Anomaly detection method.

In order to achieve the above object, an embodiment of the third aspect of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and running on the processor, when the processor executes the computer program , to realize the above-mentioned magnetic anomaly detection method based on diamond NV color center probe.

The magnetic anomaly detection method, medium, and device based on diamond NV color center probe according to the embodiment of the present invention can place the diamond NV color center probe at the position to be measured, and the magnetic measurement direction of the diamond NV color center probe obtained in advance can be measured to be measured. The first measurement result is obtained by performing magnetic field measurement at the location, and the first measurement result is compared with the standard magnetic field model. If it matches, it is determined that there is no magnetic anomaly; As a result, it is possible to use the ensemble NV color centers to detect magnetic anomalies. Due to the stable angular relationship between the axial directions of different NV color centers, it is avoided that when the conventional magnetic measurement uses three components to detect the earth's magnetic field, due to each component probe. There is an error in the packaging of the orthogonality, which leads to the problem that the overall measurement accuracy of the system is insufficient.

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

Fig. 1 is the flow chart of the magnetic anomaly detection method based on diamond NV color center probe of one embodiment of the present invention;

Fig. 2 is the flow chart of the magnetic anomaly detection method based on diamond NV color center probe of another embodiment of the present invention;

Fig. 3 is the schematic diagram of the acquisition method of the magnetic measurement direction of the diamond NV color center of an example of the present invention;

FIG. 4 is a flow chart of a method for detecting magnetic anomalies based on a diamond NV color center probe according to an example of the present invention.

Detailed ways

The method, medium, and device for magnetic anomaly detection based on diamond NV color center probes according to embodiments of the present invention are described below with reference to the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions. The embodiments described with reference to the drawings are exemplary and should not be construed as limiting the present invention.

In recent years, with the rapid development of diamond NV color center technology in the field of magnetic measurement, the magnetic measurement sensitivity of diamond NV color center can reach fT/Hz ^1/2 , which has a broad prospect in the field of magnetic measurement. In terms of microstructure, diamond NV color center refers to a quantum system formed by a nitrogen atom replacing a carbon atom in diamond and capturing a surrounding hole. By controlling the input of basic physical quantities such as light, electricity, and magnetism, Quantum manipulation of the spin of the diamond NV color center can be achieved, and by detecting and analyzing the fluorescence output of the diamond NV color center, the magnetic field intensity can be calculated and the magnetic field can be accurately measured. Since the NV color centers in the ensemble diamond are distributed in 4 different directions, the angles between these directions have strict accuracy and stability under the guarantee of the basic principles of quantum mechanics, so the NV color centers can accurately measure the magnetic field direction. On this basis, the NV color center has extremely high magnetic measurement sensitivity and can accurately measure the magnitude of the magnetic field, thereby improving the deficiencies of the fluxgate in measuring the direction and magnitude of the magnetic field, and improving the accuracy of the magnetic field measurement.

Based on this, the present invention proposes a magnetic anomaly detection method, medium and equipment based on a diamond NV color center probe.

FIG. 1 is a flowchart of a method for detecting magnetic anomalies based on a diamond NV color center probe according to an embodiment of the present invention.

As shown in Figure 1, the magnetic anomaly detection method based on the diamond NV color center probe includes:

S11, determine the magnetic measurement direction of the diamond NV color center probe.

Specifically, before using the diamond NV color center probe to perform magnetic measurement, it is necessary to first acquire the four principal axis directions of the NV color center in the diamond, and use the principal axis directions as the magnetic measurement direction.

S12, place the diamond NV color center probe at the position to be measured, and perform magnetic field measurement at the position to be measured through the diamond NV color center probe according to the magnetic measurement direction to obtain a first measurement result.

Specifically, in the daily magnetic anomaly detection, the magnetic field measurement can be performed at the position to be measured. For example, an aircraft can be used to carry the diamond NV color center probe to perform magnetic field measurement according to a preset flight path or at least a predetermined flight height, and obtain the first measurement results.

During the magnetic field measurement, microwaves can be emitted to the diamond, and the microwaves are microwaves of different frequencies, for example, microwaves of four frequencies can be emitted to the diamond. The microwaves of different frequencies can be transmitted to the diamond using one antenna, and the antenna can have multiple input interfaces to transmit microwaves of different frequencies to the diamond through the antenna using multiple wave sources. Further, the fluorescent signal emitted by the probe is received, and the fluorescent signal emitted by the probe is the fluorescence signal emitted by the NV color centers distributed in 4 different directions.

After receiving the fluorescence signal, use a preset method to distinguish the fluorescence signal. For example, it can be distinguished by the polarization and spatial distribution of the fluorescence, and the fluorescence of different axes has different polarization and spatial distribution. The frequency modulation of microwaves is realized. The resonance frequencies of different axes and the microwave frequencies are generally different, and there will be different fluorescence frequencies under different modulation frequencies, which are then distinguished according to the fluorescence frequencies.

After distinguishing the fluorescent signals emitted by the NV color centers in four different directions, the deviation between the input microwave frequency and the resonance frequency is calculated according to the intensity of the fluorescent signal. Since the microwave frequency is controlled by the computer and the user, it can be calculated by combining the deviation. Resonance frequency, so as to calculate the magnetic field strength in the axial direction according to the resonance frequency. For example, the magnetic field strength in the axial direction can be obtained according to the preset corresponding relationship between the resonance frequency and the magnetic field strength.

S13, compare the first measurement result with the standard magnetic field model corresponding to the target area, where the position to be measured is in the target area.

Specifically, the above-mentioned standard magnetic field model is a pre-acquired reference model, which represents the magnetic field when there is no abnormality. For example, the standard magnetic field model may be an earth magnetic field model. Compare the magnetic field vector in the first measurement result with the reference vector in the standard magnetic field model, where the reference vector is the magnetic field component in the three axes of X, Y, and Z, or the vector sum of the magnetic field components in the three axes of X, Y, and Z. .

S14, if the first measurement result is consistent with the standard magnetic field model, it is determined that there is no magnetic anomaly in the target area, otherwise, it is determined that there is a magnetic anomaly in the target area.

Therefore, it is possible to use the diamond NV color center to detect whether there is a magnetic anomaly. Since the angle between the diamond NV color center is very stable, the accuracy of the magnetic field measurement direction can be ensured, and there is no mutual interference between different measurement angles. Further improve the accuracy of magnetic field measurement.

In one embodiment of the present invention, referring to Fig. 2, the magnetic measurement direction of the above-mentioned determination of the diamond NV color center probe includes:

S21, the diamond NV color center probe is placed in a bias magnetic field whose size and direction are known.

Specifically, a detection device for the magnetic measurement direction of the NV color center probe can be preset, and the method for detecting the magnetic measurement direction by the detection device can be seen in FIG. 3 . When the magnetic measurement direction of the diamond NV color center probe needs to be detected, a bias magnetic field is firstly emitted to the diamond.

S22, emit a measuring laser and a measuring microwave to the diamond NV color center probe, obtain the fluorescence signal generated by the diamond NV color center probe, and adjust the frequency of the measuring microwave until four pairs of resonance frequencies are obtained, wherein each resonance frequency corresponds to a fluorescence signal Intensity local minima.

Specifically, since the diamond NV color center will emit fluorescence when excited by light of a suitable wavelength, when a microwave is applied to the NV color center, the fluorescence intensity of the NV color center will change, and at a certain microwave frequency, the fluorescence intensity will reach the minimum, that is, there is a fluorescence intensity peak corresponding to a certain microwave frequency on the fluorescence intensity-microwave frequency correspondence curve. If another magnetic field is applied to the NV color center, the fluorescence intensity peaks will split into two, and the microwave frequency difference between the two peaks is proportional to the component of the applied magnetic field on the NV color center axis. Therefore, after placing the diamond in a bias magnetic field, it is possible to emit measurement lasers and measurement microwaves, and to continuously adjust the frequency of the measurement microwaves. Since the NV color centers in each direction will reach the local minimum fluorescence intensity at two microwave frequencies, during the process of adjusting the microwave frequency, the detected fluorescence intensity can be monitored until eight local minimum fluorescence intensity values are found. , and identify four pairs of resonance frequencies corresponding to eight local minima of fluorescence intensity.

Optionally, the adjustment range of the microwave frequency can also be preset, and after the measurement laser and the measurement microwave are emitted to the diamond, the frequency of the measurement microwave is continuously adjusted until the entire adjustment range is covered, so as to find eight fluorescence intensities according to the measurement results. local minima, and identify four pairs of resonance frequencies corresponding to the eight local minima of fluorescence intensity.

S23, obtain the magnetic field strength in the corresponding magnetic measurement direction according to each pair of microwave frequencies, and obtain the magnetic measurement direction according to the magnetic field strength and the magnitude and direction of the bias magnetic field.

Optionally, the corresponding relationship between the resonance frequency and the magnetic measurement direction can also be selected to be established in advance, and after the resonance frequency is obtained, the magnetic measurement direction can be determined by looking up a table.

It should be noted that, if the magnetic measurement directions of the NV color centers in four different directions cannot be obtained according to the above four pairs of resonance frequencies, the placement position of the diamond NV color center probe can be adjusted, and the above process can be performed again.

In an embodiment of the present invention, the above-mentioned method for acquiring the standard magnetic field model includes the following steps:

A1, according to the magnetic measurement direction, the magnetic field measurement is performed on multiple positions in the target area by the diamond NV color center probe to obtain the second measurement result, and the first correspondence between the second measurement result and the position is obtained.

Specifically, the diamond NV color center probe is placed at multiple positions in the target area, and then multiple measurements are performed on each position. For example, multiple probes at different positions can be set to measure at the same time, and for example, one probe can be used to move while Test on one side. After acquiring multiple sets of magnetic field measurement results corresponding to each position, each set of magnetic field measurement results includes magnetic field measurement results in four directions, and analyzes and processes the magnetic field measurement results in the four directions, and converts them to right angles In the coordinate system, the second measurement result is obtained. For example, an aircraft can be used to carry a diamond NV color center probe to repeatedly fly according to a preset flight path or at least a predetermined flight height, and obtain multiple sets of magnetic field measurement results corresponding to each position.

After the second measurement result is obtained, the second measurement result is analyzed, outliers are proposed, and an average value is taken. For example, if the above-mentioned standard magnetic field model is a model representing the earth's magnetic field, the second measurement result can be analyzed by using the characteristics of the uniform change of the magnetic field gradient on the earth's surface, and the abnormal values that obviously do not conform to this characteristic in the second measurement result can be eliminated. In the remaining measurement results, multiple groups of measurement results corresponding to the same position are averaged to obtain a processed second measurement result.

After the second measurement result is analyzed and processed, the processed second measurement result and the position are bound to obtain a first correspondence between the second measurement result and the position.

Optionally, when the first correspondence is obtained according to the processed second measurement result, the processed second measurement result may also be combined into a vector. That is to say, the second measurement result in the above-mentioned first correspondence relationship may be the magnetic field components in the three axes of X, Y, and Z, or may be a synthesized vector.

A2, establish a standard magnetic field model according to the first correspondence.

As an example, if the standard magnetic field model to be established is the earth's magnetic field model, the standard magnetic field model may be established by using the uniform change of the magnetic field gradient of the earth's magnetic field.

In this way, the standard magnetic field model can be obtained, so that after the first measurement result is obtained by measurement, whether there is a magnetic abnormality can be determined according to whether the first measurement result is consistent with the standard magnetic field model.

In one embodiment of the present invention, if the first measurement result is inconsistent with the standard magnetic field model, the above-mentioned method for detecting magnetic anomaly based on a diamond NV color center probe further includes: comparing the first measurement result with a plurality of magnetic anomaly models, and According to the comparison results, determine the target that causes the magnetic anomaly in the target area.

Specifically, the above-mentioned magnetic anomaly model is a pre-acquired magnetic field representing different reference detection targets. For example, if the reference detection target is metal accumulation, the corresponding magnetic anomaly model indicates the magnetic field of the target area in the presence of metal accumulation. magnetic field. Furthermore, in the case where the first measurement result does not match the standard magnetic field model, if there is a magnetic anomaly model consistent with the first measurement result, the target object is determined to be the reference detection target corresponding to the magnetic anomaly model; If the result is consistent with the magnetic anomaly model, the target is determined to be an unknown target.

Moreover, if it is determined that the target is the benchmark detection target corresponding to the magnetic anomaly model, the reliability can also be noted according to preset rules.

Wherein, the acquisition method of the above-mentioned magnetic anomaly model includes the following steps:

B1, after placing different reference detection targets in the target area, perform magnetic field measurement on multiple positions in the target area through the diamond NV color center probe according to the magnetic measurement direction to obtain a third measurement result, and obtain the third measurement result, position, reference A second correspondence between the detection targets, wherein the reference detection target is used to make the target area magnetically abnormal.

B2, a magnetic anomaly model is obtained according to the second correspondence relationship and the standard magnetic field model.

Specifically, various benchmark detection targets can be manually set in the target area according to actual needs. For example, if underwater target detection is required in practical applications, the setting conditions included in the manual setting of benchmark detection targets are: The detection target should cover Different volume, quality, material and structure, the detection target is in different water depth, motion state and working state during detection. And then utilize the diamond NV color center probe to detect this benchmark detection target, for example, can use the aircraft to carry the diamond NV color center probe to carry out repeated flight according to the preset flight path or at least the predetermined flight height, and obtain the corresponding to each position. Multiple sets of magnetic field measurement results, and then a third measurement result corresponding to each position is obtained according to the multiple sets of magnetic field measurement results, thereby obtaining a second correspondence. And after the second corresponding relationship is obtained, the magnetic anomaly model can be obtained according to the second corresponding relationship and the standard magnetic field model.

The magnetic anomaly detection method based on a diamond NV color center probe according to an embodiment of the present invention will be described in detail below with reference to a specific example. In this particular example, the standard magnetic field model is the Earth's magnetic field model.

Specifically, referring to FIG. 4 , an external magnetic field whose direction and intensity are determined is set first, and the diamond NV color center probe is placed in the external magnetic field. The microwave frequency of the modulating microwave is adjusted, and the fluorescence emitted by the diamond NV color center is detected, and the resonance frequency is obtained according to the local minimum value of the fluorescence intensity. The corresponding relationship between the resonance frequency and the direction can be preset, so that the magnetic measurement direction of the NV color center can be found according to the resonance frequency, and the magnetic measurement direction is the axial direction of the NV color center. Moreover, if the magnetic measurement direction of the NV color center cannot be determined by one measurement, the direction of the diamond can be adjusted, and then the resonance frequency can be obtained.

After determining the magnetic measurement direction, the diamond NV color center probe can be used to measure the earth's magnetic field to obtain the magnetic field strengths on the four axes of the NV color center, and convert them into three-dimensional magnetic field strengths to obtain the second measurement result. According to the second measurement result, the variation curve of the magnetic components of the earth's magnetic field in the three axes of X, Y, and Z is obtained, or the variation curve of the earth's magnetic field vector is obtained, and a standard magnetic field model is established according to the measurement result.

After the standard magnetic field model is obtained, a benchmark detection target is set in the target area, and the diamond NV color center probe is used to detect the target area after the benchmark detection target is set, and a third detection result is obtained. According to the third detection result, the standard magnetic field model , The detected target object establishes a magnetic anomaly model.

After the standard magnetic field model and the magnetic anomaly model are established, the geomagnetic field data is measured in real time during daily magnetic anomaly detection, the first measurement result is obtained according to the measured data, and the first measurement result is compared with the standard magnetic field model and the magnetic anomaly model. , determine whether there is a magnetic anomaly, and when there is a magnetic anomaly, determine the target object with magnetic anomaly in the target area.

To sum up, the magnetic anomaly detection method based on the diamond NV color center probe according to the embodiment of the present invention can place the diamond NV color center probe at the position to be measured, and the position to be measured according to the magnetic measurement direction of the diamond NV color center probe obtained in advance. Perform magnetic field measurement to obtain a first measurement result, and compare the first measurement result with the standard magnetic field model. If they match, it is determined that there is no magnetic anomaly, and if not, it is determined that there is a magnetic anomaly. Therefore, it is possible to use the ensemble NV color center to detect magnetic anomalies, which is not only conducive to the miniaturization of the equipment, but also has a multi-axial magnetometry structure inside the ensemble NV color center, which can be realized by using one probe. It can detect the magnetic field or obtain the magnetic field vector information; in addition, there is a stable angular relationship between the axial directions of different NV color centers, which avoids that when the conventional magnetic measurement uses three components to detect the earth's magnetic field, due to the orthogonality of each component probe in the package. There is a problem that the overall measurement accuracy of the system is insufficient due to errors. Moreover, if it is determined that there is a magnetic anomaly, the first measurement result can also be compared with the magnetic anomaly model to determine a target object with a magnetic anomaly in the target area, thereby achieving better detection of the magnetic anomaly.

Further, the present invention provides a computer-readable storage medium.

In the embodiment of the present invention, a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor, the above-mentioned magnetic anomaly detection method based on a diamond NV color center probe is implemented.

In the computer-readable storage medium of the embodiment of the present invention, when the computer program thereon is executed by the processor, the first measurement result can be obtained by performing magnetic field measurement on the position to be measured according to the magnetic measurement direction of the diamond NV color center probe obtained in advance, and The first measurement result is compared with the standard magnetic field model, and if it is consistent, it is determined that there is no magnetic anomaly, and if not, it is determined that there is a magnetic anomaly. Therefore, it is possible to use the ensemble NV color center to detect magnetic anomalies, which is not only conducive to the miniaturization of the equipment, but also has a multi-axial magnetometry structure inside the ensemble NV color center, which can be realized by using one probe. It can detect the magnetic field or obtain the magnetic field vector information; in addition, there is a stable angular relationship between the axial directions of different NV color centers, which avoids that when the conventional magnetic measurement uses three components to detect the earth's magnetic field, due to the orthogonality of each component probe in the package. There is a problem that the overall measurement accuracy of the system is insufficient due to errors. Moreover, if it is determined that there is a magnetic anomaly, the first measurement result can also be compared with the magnetic anomaly model to determine a target object with a magnetic anomaly in the target area, thereby achieving better detection of the magnetic anomaly.

Further, the present invention provides an electronic device.

In the embodiment of the present invention, the electronic device includes a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, the above-mentioned magnetic anomaly detection based on a diamond NV color center probe is realized. method.

In the electronic device of the embodiment of the present invention, by implementing the above-mentioned magnetic anomaly detection method based on the diamond NV color center probe, the first measurement result can be obtained by performing magnetic field measurement on the position to be measured according to the magnetic measurement direction of the diamond NV color center probe obtained in advance, The first measurement result is compared with the standard magnetic field model, and if it is consistent, it is determined that there is no magnetic anomaly, and if it is not consistent, it is determined that there is a magnetic anomaly. Therefore, it is possible to use the ensemble NV color center to detect magnetic anomalies, which is not only conducive to the miniaturization of the equipment, but also has a multi-axial magnetometry structure inside the ensemble NV color center, which can be realized by using one probe. It can detect the magnetic field or obtain the magnetic field vector information; in addition, there is a stable angular relationship between the axial directions of different NV color centers, which avoids that when the conventional magnetic measurement uses three components to detect the earth's magnetic field, due to the orthogonality of each component probe in the package. There is a problem that the overall measurement accuracy of the system is insufficient due to errors. Moreover, if it is determined that there is a magnetic anomaly, the first measurement result can also be compared with the magnetic anomaly model to determine a target object with a magnetic anomaly in the target area, thereby achieving better detection of the magnetic anomaly.

It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein may be considered as an ordered list of executable instructions for implementing the logic functions, and may be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device) system, device or equipment. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport the program for use by or in connection with an instruction execution system, apparatus, or apparatus. More specific examples (non-exhaustive list) of computer readable media include the following: electrical connections with one or more wiring (electronic devices), portable computer disk cartridges (magnetic devices), random access memory (RAM), Read Only Memory (ROM), Erasable Editable Read Only Memory (EPROM or Flash Memory), Fiber Optic Devices, and Portable Compact Disc Read Only Memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program may be printed, as the paper or other medium may be optically scanned, for example, followed by editing, interpretation, or other suitable medium as necessary process to obtain the program electronically and then store it in computer memory.

It should be understood that various parts of the present invention may be implemented in hardware, software, firmware or a combination thereof. In the above-described embodiments, various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, it can be implemented by any one or a combination of the following techniques known in the art: discrete logic with logic gates for implementing logic functions on data signals circuits, ASICs with suitable combinational logic gates, Programmable Gate Arrays (PGA), Field Programmable Gate Arrays (FPGA), etc.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the description of this specification, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left" ", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", The orientation or positional relationship indicated by "circumferential direction" is based on the orientation or positional relationship shown in the drawings, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as Limitations of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the description of this specification, unless otherwise stated, the terms "installation", "connection", "connection", "fixation" and other terms should be interpreted in a broad sense, for example, it may be a fixed connection or a detachable connection, or It can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two elements or the interaction relationship between the two elements, unless otherwise clearly defined . For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the 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 level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present invention. Embodiments are subject to variations, modifications, substitutions and variations.

Claims (10)

1. a magnetic anomaly detection method based on diamond NV color center probe, is characterized in that, described method comprises: Determine the magnetic measurement direction of the diamond NV color center probe; The diamond NV color center probe is placed at the position to be measured, and the first measurement result is obtained by performing magnetic field measurement on the position to be measured by the diamond NV color center probe according to the magnetic measurement direction; comparing the first measurement result with a standard magnetic field model corresponding to a target area, wherein the position to be measured is in the target area; If the first measurement result is consistent with the standard magnetic field model, it is determined that there is no magnetic anomaly in the target area; otherwise, it is determined that there is a magnetic anomaly in the target area. 2. the magnetic anomaly detection method based on diamond NV color center probe according to claim 1, is characterized in that, described by described first measurement result and the standard magnetic field model corresponding to described target area is compared, comprising: The magnetic field vector in the first measurement is compared to a reference vector in the standard magnetic field model. 3. the magnetic anomaly detection method based on diamond NV color center probe according to claim 2, is characterized in that, described reference vector is the magnetic field component of X, Y, Z triaxial or X, Y, Z triaxial The vector sum of the magnetic field components of . 4. a kind of magnetic anomaly detection method based on diamond NV color center according to claim 1, is characterized in that, the described magnetic measurement direction of determining diamond NV color center probe, comprises: The diamond NV color center probe is placed in a bias magnetic field whose size and direction are known; To the diamond NV color center probe, launch a measurement laser and a measurement microwave, obtain the fluorescent signal generated by the diamond NV color center probe, and adjust the frequency of the measurement microwave until four pairs of resonance frequencies are obtained, wherein each resonance frequency Both correspond to a local minimum value of fluorescence intensity; The magnetic field strength in the corresponding magnetic measurement direction is obtained according to each pair of microwave frequencies, and the magnetic measurement direction is obtained according to the magnetic field strength and the magnitude and direction of the bias magnetic field. 5. the magnetic anomaly detection method based on diamond NV color center probe according to claim 1, is characterized in that, the acquisition method of described standard magnetic field model comprises: According to the magnetic measurement direction, the diamond NV color center probe performs magnetic field measurement on multiple positions in the target area to obtain a second measurement result, and obtains a first correspondence between the second measurement result and the position ; The standard magnetic field model is established according to the first correspondence. 6. the magnetic anomaly detection method based on diamond NV color center probe according to claim 5, is characterized in that, if described first measurement result is inconsistent with described standard magnetic field model, described method also comprises: The first measurement result is compared with a plurality of magnetic anomaly models, and the target object causing the magnetic anomaly in the target area is determined according to the comparison result. 7. the magnetic anomaly detection method based on diamond NV color center probe according to claim 6, is characterized in that, described according to the comparison result to determine the target object that causes the magnetic anomaly of described target area, comprises: If there is a magnetic anomaly model consistent with the first measurement result, determining that the target is a reference detection target corresponding to the magnetic anomaly model; If there is no magnetic anomaly model consistent with the first measurement result, it is determined that the target is an unknown target. 8. the magnetic anomaly detection method based on diamond NV color center probe according to claim 6, is characterized in that, the acquisition method of described magnetic anomaly model comprises: After different reference detection targets are placed in the target area, a third measurement result is obtained by performing magnetic field measurement on multiple positions in the target area through the diamond NV color center probe according to the magnetic measurement direction, and the third measurement result is obtained. a second correspondence between the measurement result, the position, and the reference detection target, wherein the reference detection target is used to make the target area magnetically abnormal; The magnetic anomaly model is obtained according to the second corresponding relationship and the standard magnetic field model. 9. a computer-readable storage medium, having a computer program stored thereon, is characterized in that, when described computer program is executed by processor, realize based on diamond NV color center as described in any one of claim 1-8 Magnetic anomaly detection method for probes. 10. An electronic device, characterized in that it comprises a memory, a processor, and a computer program stored on the memory and running on the processor, when the processor executes the computer program, the computer program as claimed in claims 1-8 is realized. The magnetic anomaly detection method based on diamond NV color center probe described in any one.

Images