CN116679107A - Quantum transformer based on anti-Stokes effect and current detection method - Google Patents
Quantum transformer based on anti-Stokes effect and current detection method Download PDFInfo
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Abstract
The application relates to the technical field of quantum precision measurement, and in particular relates to a quantum transformer based on an anti-Stokes effect, which comprises a front end, a rear end, an insulator and a transmission line connected between the front end and the rear end, wherein the insulator comprises an insulating channel for installing the transmission line, the rear end comprises a laser module and a processing unit, and the front end comprises a front end light path module, a wavelength conversion module and a solid spin quantum probe; the application discloses a method for detecting current of a high-voltage side of a power grid by using a quantum transformer, which is characterized in that a wavelength conversion module is arranged at the front end of the quantum transformer, the wavelength of fundamental frequency light is regulated based on an anti-Stokes effect, so that the wavelength conversion module is converted into exciting light capable of exciting a solid spin color center at the front end, the low-loss fundamental frequency light is utilized to replace the transmission of the exciting light between the front end and the rear end, the loss and disturbance of the exciting light are effectively reduced, and the measuring precision and stability are further ensured.
Description
Technical Field
The application relates to the technical field of quantum precision measurement, in particular to a quantum transformer based on an anti-Stokes effect and a current detection method.
Background
The solid-state spin color center system is an important physical system for realizing quantum precise measurement, taking the diamond NV color center in the system as an example, the diamond NV color center shows stronger fluorescence under the pumping of laser, and the fluorescence intensity is regularly related to external physical quantity, so the solid-state spin color center system can be used as a novel sensing core for measuring physical quantity such as magnetic field, electric field, temperature and the like, and besides the diamond NV color center, the solid-state spin color center system also comprises a silicon vacancy color center, a boron vacancy color center and the like.
However, in the existing quantum transformer constructed based on the solid-state spin color center, the solid-state spin color center and the laser module are respectively arranged at the detection front end and the detection rear end, in some detection situations, especially when the detection front end and the detection rear end of the transformer are far apart (such as current detection at the high voltage side of a power grid, the solid-state spin color center is at the high voltage side, and the laser module is at the low voltage side), the excitation laser generated by the laser module has larger light loss and disturbance (taking the diamond NV color center as an example, the wavelength of the excitation laser is 532nm, the excitation laser does not belong to the communication band laser, and the light intensity is lower), which can lead to poor excitation effect of the solid-state spin color center and lower measurement precision.
Based on the above, the application designs a quantum transformer based on anti-Stokes effect and a current detection method to solve the above problems.
Disclosure of Invention
The application aims to provide a quantum transformer capable of reducing excitation laser loss and disturbance and a current detection method of the quantum transformer applied to a high-voltage side of a power grid.
In order to achieve the above purpose, the present application provides the following technical solutions:
the quantum transformer based on the anti-Stokes effect comprises a front end, a rear end, an insulator and a transmission line connected between the front end and the rear end, wherein the insulator comprises an insulating channel for installing the transmission line, the rear end comprises a laser module and a processing unit, and the front end comprises a front end light path module, a wavelength conversion module and a solid spin quantum probe;
the laser module is used for outputting fundamental frequency light, and the processing unit is used for data processing and analysis;
the front-end optical path module is used for acquiring fundamental frequency light and adjusting and transmitting optical signals in the front end, the wavelength conversion module is used for converting the wavelength of the fundamental frequency light into excitation laser, and the solid-state spin quantum probe is used for generating feedback fluorescence under the action of the excitation laser.
Further, the front end comprises a light intensity adjuster for adjusting the intensity of the excitation laser.
Further, the front end comprises a microwave module, and the microwave module is used for outputting excitation microwaves acting on the solid spin quantum probe.
Further, the front end comprises a photo detection processing module for collecting and processing feedback fluorescence to form an electrical signal output.
Further, the front end further comprises an optical transmitter, the optical transmitter is connected with the electric signal output by the photoelectric detection processing module and generates a modulated optical signal to be output, the processing unit comprises an optical receiver and a host, the optical receiver is used for receiving and demodulating the modulated optical signal, and the host is used for processing and analyzing the signal demodulated and output by the optical receiver.
Further, the wavelength range of the fundamental frequency light is 800-1100 nm.
Further, the transmission line includes an optical fiber through which the optical signals transmitted between the front end and the rear end are transmitted.
Furthermore, the solid spin quantum probe is provided with 2n detection bits, and all the detection bits are uniformly distributed on a virtual circumference.
Furthermore, the front end also comprises an electromagnetic shielding chamber, part or all of the electrifying equipment positioned at the front end is arranged in the electromagnetic shielding chamber, and the solid spin quantum probe is positioned at the outer side of the electromagnetic shielding chamber.
Further, the front end also comprises a magnetic shielding ring, and the solid spin quantum probe is positioned on the inner side of the magnetic shielding ring.
Furthermore, the front end also comprises a magnetic collector, and the solid spin quantum probe is positioned in a magnetic collection air gap of the magnetic collector.
Furthermore, the magnetic collector is also provided with a feedback adjusting coil, and the feedback adjusting coil is used for adjusting and controlling the magnetic field intensity in the magnetic collecting air gap.
Further, the device also comprises a photocell module, wherein the photocell module is used for converting part of fundamental frequency light into front-end electric energy and supplying power to electric devices in the front-end.
Further, the front end further comprises a light recycling module, wherein the light recycling module is used for recycling useless light signals in the front end and converting the useless light signals into front-end electric energy through the photocell module.
The current detection method, which is applied to the quantum transformer based on the anti-Stokes effect, comprises the following steps:
s1, placing the front end on a high-voltage side of a power grid, and placing the rear end on a low-voltage side of the power grid;
s2, transmitting fundamental frequency light from a low-voltage side of the power grid to a high-voltage side of the power grid;
s3, on the high-voltage side of the power grid, fundamental frequency light is converted into excitation laser through wavelength adjustment;
s4, the solid spin quantum probe senses a magnetic field generated by the electrified conductor and generates feedback fluorescence under the action of excitation laser;
and S5, collecting, analyzing and calculating the feedback fluorescence to obtain the to-be-measured value.
Further, in the detection process, no electric signal is transmitted between the front end and the rear end.
Compared with the prior art, the application has the beneficial effects that: the application discloses a method for detecting current of a high-voltage side of a power grid by using a quantum transformer, which is characterized in that a wavelength conversion module is arranged at the front end of the quantum transformer, the wavelength of fundamental frequency light is regulated based on an anti-Stokes effect, so that the wavelength conversion module is converted into exciting light capable of exciting a solid spin color center at the front end, the low-loss fundamental frequency light is utilized to replace the transmission of the exciting light between the front end and the rear end, the loss and disturbance of the exciting light are effectively reduced, and the measuring precision and stability are further ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a quantum transformer according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a transmission line according to an embodiment of the present application;
FIG. 3 is a schematic diagram of another system of quantum transformers according to an embodiment of the present application;
fig. 4 is a schematic diagram of another structure of a transmission line according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a quantum transformer according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a light recycling module according to an embodiment of the application;
fig. 7 is a schematic structural diagram of a quantum transformer according to an embodiment of the present application;
FIG. 8 is a schematic diagram of a magnetic concentrator according to an embodiment of the present application;
FIG. 9 is a schematic diagram of a magnetic concentrator according to an embodiment of the present application;
FIG. 10 is a schematic diagram of a magnetic concentrator and a feedback conditioning coil according to an embodiment of the present application;
FIG. 11 is a flow chart of a current detection method according to an embodiment of the application;
fig. 12 is an installation schematic diagram of a quantum transformer for current detection in an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present application, it should be understood that the terms "first," "second," and the like are used for defining the components, and are merely for convenience in distinguishing the corresponding components, and the terms are not meant to have any special meaning unless otherwise indicated, so that the scope of the present application is not to be construed as being limited.
Before the embodiment of the application is described, the anti-stokes effect is described briefly, that is, the abnormal phenomenon that the wavelength of the emitted light of the substance is shorter than that of the excited light is that of the substance, the up-conversion luminescence and the multiphoton luminescence belong to the anti-stokes effect, and the frequency doubling effect in the up-conversion luminescence is taken as an example, if the fundamental frequency light is 1064nm, the fundamental frequency light irradiates the frequency doubling crystal, and after the frequency doubling effect, the frequency doubling light of 532nm is generated.
Quantum transformer embodiments
As shown in fig. 1, this example describes a quantum transformer based on anti-stokes effect, which includes a front end 1, a back end 2, an insulator 3, and a transmission line 4 connected between the front end 1 and the back end 2, the insulator 3 includes an insulating channel for installing the transmission line 4, the back end 2 includes a laser module 21 and a processing unit 22, and the front end 1 includes a front end optical path module, a wavelength conversion module 12, and a solid-state spin quantum probe 13.
In this example, the insulator 3 includes an insulating channel for installing the transmission line 4, and the insulator 3 can make the line connection between the front end and the rear end safer and more reliable, and the insulator 3 can be a ceramic material, a glass insulator, a composite insulator, or the like.
In this example, the laser module is configured to output fundamental frequency light, and one specific design is: the laser module 21 is a laser source, and uses a communication band laser in consideration of low loss of the fundamental frequency light, so that the wavelength range of the fundamental frequency light is limited to 800-160 nm.
In this example, the front-end optical path module is used for acquiring fundamental frequency light and adjusting and transmitting optical signals in the front end, as shown in fig. 1, and exemplary, the front-end optical path module includes a plurality of optical fibers, a plurality of optical fiber couplers 111 and a bicolor plate 112, the fundamental frequency light is connected to one of the optical fiber couplers 111 through the transmission line 4 and is transmitted into the wavelength conversion module 12 through the optical fibers, the wavelength conversion module 12 converts the fundamental frequency light into excitation laser, the excitation laser passes through the bicolor plate 112 and then acts on the solid-state spin quantum probe 13, the solid-state spin quantum probe 13 is excited to generate feedback fluorescence changing with detection factors (magnetic field, temperature, electromagnetic, pressure, etc.), part of the feedback fluorescence and the excitation laser returns along the original optical path, the feedback fluorescence is screened out at the bicolor plate 112, and the detection result can be obtained by analyzing and calculating the feedback fluorescence.
In this example, the wavelength conversion module 12 is configured to convert the wavelength of the fundamental light into excitation laser light, and the wavelength conversion module 12 is illustratively a frequency doubling laser, which is capable of reducing the wavelength of the fundamental light by half, for example, the fundamental light is 1064nm, and the 532nm laser light can be formed after the frequency doubling laser acts.
In this example, the solid-state spin quantum probe 13 is used for generating feedback fluorescence under the action of excitation laser, in some exemplary realizable schemes, the sensing core of the solid-state spin quantum probe 13 is a diamond NV color center, the corresponding wavelength of the excitation laser is 532nm, the feedback fluorescence is 637nm red light, the solid-state spin quantum probe 13 shown in fig. 1 only has one detection point, in other embodiments, the solid-state spin quantum probe 13 can also detect multiple points, and if the solid-state spin quantum probe 13 corresponds to one point, the solid-state spin quantum probe 13 needs to realize the function of multi-point detection, and if a single solid-state spin quantum probe 13 has multiple detection points, the solid-state spin quantum probe 13 can realize the function of multi-point detection (see the distributed probe mentioned in patents such as CN114459512A, CN114459512B, etc., which can realize multi-point detection through a single sensor).
In this example, the processing unit 22 is used for data processing and analysis, as shown in fig. 1, in which the feedback fluorescence is directly transmitted back to the back end, so that the processing unit 22 includes a photo-detection processing module and a host, the photo-detection processing module is used for collecting the feedback fluorescence and converting the feedback fluorescence into an electrical signal for output, and the host processes and analyzes the electrical signal output by the photo-detection processing module, and in a specific manner, the photo-detection processing module includes a photodiode (preferably an avalanche diode) through which the feedback fluorescence is collected and converting the feedback fluorescence into the electrical signal, or the photo-detection processing module further includes a lock-in amplifier, and processes the electrical signal output by the photodiode through lock-in to achieve the function of improving the detection precision.
In the embodiment shown in fig. 1, the transmission line 4 is divided into 2 optical fiber lines, one of which is used for transmitting fundamental frequency light, and the other is used for transmitting feedback fluorescence, and in consideration of simplifying the optical path, as some improved designs, the transmission line 4 is an optical fiber through which optical signals transmitted between the front end 1 and the rear end 2 are all transmitted, and as shown in fig. 2, exemplary, two ends of the optical fiber are respectively provided with a three-port circulator, so that the transmission of the fundamental frequency light and the feedback fluorescence in the same optical fiber is realized through the circulator, and the two operations do not interfere with each other, which is a common function of the circulator, and the wiring of the circulator is shown in fig. 2 and is not repeated here.
In some embodiments not shown in the drawings, the feedback fluorescence may be converted into an electrical signal in the front end 1 and then transmitted back, and correspondingly, the front end 1 further includes a photodetection processing module (a photodiode or a combination of a photodiode and a phase lock), so as an adaptive design, the transmission line 4 should include an electrical wire line and an optical fiber line, where the electrical wire line is used for transmitting the electrical signal output by the photodetection processing module, and the optical fiber line is used for transmitting the fundamental frequency light.
Considering that the feedback fluorescence (taking the diamond NV color center as an example, the feedback fluorescence wavelength is 637nm, the intensity is reduced, and the transmission loss is larger) is not suitable for long-distance transmission, so in other designs, the feedback fluorescence is converted into a modulated optical signal of a communication band and then transmitted back to the back end 2, as shown in fig. 3, the processing unit includes an optical receiver 221 and a host 222, the front end 1 further includes a photoelectric detection processing module 14 and an optical transmitter 15, the photoelectric detection processing module 14 is used for collecting the feedback fluorescence and converting the feedback fluorescence into an electrical signal for output, the optical transmitter 15 is used for generating a corresponding modulated optical signal according to the electrical signal output by the photoelectric detection processing module 14, the optical receiver 221 is used for receiving and demodulating the modulated optical signal, the host 222 is used for processing and analyzing the signal demodulated by the optical receiver 221, as some improved designs, in this example, the transmission line 4 is an optical fiber, as shown in fig. 4, two ends of the optical fiber are respectively provided with a three-port circulator, the fundamental frequency light and the modulated optical signal are realized through the circulator, and the two optical signals are not interfered by the circulator, as shown in fig. 4.
In some embodiments, considering that the solid-state spin quantum probe has a certain requirement on the light intensity of the excitation laser (taking the diamond NV color center as an example, when the light intensity of the excitation laser is too high, the temperature of the diamond NV color center can cause measurement misalignment, otherwise, the light intensity is too low, so that the NV color center excitation effect is poor, and thus feedback fluorescence is difficult to collect, etc.), a light intensity regulator is further provided at the front end, through which the intensity of the excitation laser is regulated, and as an example, as shown in fig. 5, the light intensity regulator 17 is provided between the output end of the wavelength conversion module 12 and the bi-color chip 112, and can regulate the light intensity of the excitation laser output by the wavelength conversion module 12, so that the excitation laser is at a light intensity value suitable for exciting the solid-state spin quantum probe 13, and as an option, the light intensity regulator 17 is a light attenuator.
In some embodiments, as shown in fig. 5, the front end 1 further includes a microwave module 18, where the microwave module 18 is configured to output excitation microwaves acting on the solid spin quantum probe, specifically, the microwave module 18 includes a microwave source, a microwave switch, a microwave amplifier, a microwave transmission line, and a microwave antenna, and the microwave antenna finally outputs excitation microwaves to excite the solid spin quantum probe 13, where the excitation of the solid spin quantum probe is performed by using both microwaves and laser, so that the measurement result of the method is more accurate (ODMR detection is a prior art and is not described herein).
In some embodiments, the front-end 1 further includes a photocell module 16, where the photocell module 16 is configured to convert a portion of the fundamental frequency light into front-end electrical energy and supply power to electrical devices (such as a photodetection processing module, an optical transmitter, a microwave module, etc.) in the front-end, and in a preferred embodiment, as shown in fig. 5, the front-end optical path module further includes a beam splitter 113, which is capable of splitting a beam of the fundamental frequency light into two paths, one path being connected to the photocell module 16 and one path being connected to the wavelength conversion module 12.
In a further improvement, especially in the case of designing the photovoltaic module 16 in the front end 1, the fundamental frequency light needs to satisfy the requirement of low loss and also has sufficient photoelectric conversion efficiency, and based on this, the wavelength range of the fundamental frequency light is set within 800-1100 nm in this example.
As some improvements, considering that there is more optical signal waste in the front end 1, in some embodiments, the front end 1 further includes a light recycling module, where the light recycling module is configured to recycle unwanted optical signals in the front end and convert the unwanted optical signals into front-end electrical energy through the photocell module, and, illustratively, considering that the NV color center probe (for convenience of explanation, the NV color center probe is a diamond particle containing an NV color center and is disposed at an end of an optical fiber) is prone to more optical loss, as shown in fig. 6, the light recycling module includes a collection mirror set disposed near the diamond particle and an optical fiber coupler, where the collection mirror set is capable of collecting and converging the optical signals scattered from the diamond particle as recycling laser, and coupling the recycling laser into the optical fiber through the optical fiber coupler, and transmitting the recycling laser to the photocell module for conversion into front-end electrical energy.
It is contemplated that the quantum transformers in the foregoing embodiments may be power transformers, temperature transformers, magnetic field transformers, pressure transformers, and the like.
Considering that the electrical devices of the front end 1 generate interference signals (such as electric signals and magnetic fields), which can cause interference to the actual measurement environment (especially the environment of the transformer for detecting the current of the conductive conductor), the measurement accuracy is reduced, based on this, as some improved designs, as shown in fig. 7, electromagnetic shielding is performed on some electrical devices at the front end, specifically: the front end 1 also comprises an electromagnetic shielding chamber 5, part or all of the electrifying equipment positioned at the front end 1 is arranged in the electromagnetic shielding chamber 5, the solid spin quantum probe 13 is positioned at the outer side of the electromagnetic shielding chamber 5, the structural design can effectively solve the interference problem, as some improved designs, the electromagnetic shielding chamber 5 is designed to be dampproof and dustproof, and the structural design is designed to avoid the occurrence of the point discharge phenomenon (such as the design of curved corners, etc.); in order to facilitate the installation of the solid spin quantum probe 13, a mounting rack 6 should be further designed outside the electromagnetic shielding chamber 5, as shown in fig. 7, the mounting rack 6 is an primary ring, the inner hole of the ring is a detection channel, the electromagnetic shielding chamber 5 is arranged at the bottom end of the primary ring, and the insulator 3 is arranged at the bottom end of the electromagnetic shielding chamber 5 to play a role of insulation and support.
In some embodiments, the solid-state spin quantum probe has 2n detection bits, all detection bits are uniformly distributed on a virtual circumference, the design can obtain even detection data when the current is measured on the electrified conductor, and then the data are processed by using a loop integration method, so that noise can be effectively reduced, and the detection precision is improved.
Considering the problem of detection accuracy degradation caused by external magnetic field interference during actual detection, two solutions are proposed here, specifically as follows:
firstly, the magnetic shielding ring 191 is designed at the front end 1, the solid spin quantum probe 13 is located on the inner side of the magnetic shielding ring 191, the magnetic shielding ring 191 can shield the interference of an external magnetic field on the detection quantity, the detection accuracy is improved, and for example, referring to fig. 7, the magnetic shielding ring 191 is concentrically installed in a primary ring.
Secondly, designing a magnetic concentrator 192 at the front end 1, wherein the solid-state spin quantum probe 13 is positioned in a magnetic concentrating air gap of the magnetic concentrator 192, the magnetic concentrator 192 is used for amplifying a magnetic field to be measured and reducing the occupation ratio (negligible) of an external interference magnetic field in a measurement result, so that an anti-interference effect is achieved, and in the case of a single solid-state spin quantum probe 13, as shown in fig. 8, the magnetic concentrator 192 is a C-shaped magnetic concentrating ring and comprises a notch (magnetic concentrating air gap); for the case of multiple quantum probes, the magnetic concentrator 192 includes a plurality of arc portions, and when all arc portions are distributed in a ring shape, notches (magnetic concentration air gaps) with the same number and consistent positions as those of the solid spin quantum probes 13 exist, and as shown in fig. 9, the magnetic concentrator structure design in the case of 4 groups of NV color center probes is shown.
In addition, considering that the magnetic collector has a certain magnetic collecting saturation region, under the situation that the magnetic field to be measured is larger, the problem of magnetic collecting saturation is easy to occur, when the magnetic field exceeds a threshold value, accurate detection cannot be realized, and based on the problem, the magnetic collector is used as some preferable designs: the magnetic collector 192 is further provided with a feedback adjusting coil 193, the feedback adjusting coil 193 is used for adjusting and controlling the magnetic field intensity in the magnetic collecting air gap, the photocell module 12 comprises a feedback power supply unit, the feedback power supply unit is electrically connected with the feedback adjusting coil 193, the feedback power supply unit comprises a power supply part and a control part, the feedback power supply unit can controllably supply power to the feedback adjusting coil 193, the control part adjusts and controls the magnitude of feedback current according to measurement data and outputs a characteristic value when the magnetic field intensity in the magnetic collecting air gap meets adjustment and control requirements (as a preferable collocation design, a photoelectric detection processing module can be designed at the front end, an electric signal output by the photoelectric detection processing module is used as an adjustment basis of the control part), the characteristic value is used as detection data for processing analysis (the characteristic value is the electric signal, the characteristic value can be directly transmitted back, and can also be converted into the electric signal through the optical transmitter to be transmitted back), and the figure 10 is a schematic diagram of designing the feedback adjusting coil 193 on the C-shaped magnetic collecting ring.
Method of detection embodiment
The present embodiment proposes a current detection method, which applies the quantum transformer based on anti-stokes effect in the foregoing embodiment, as shown in fig. 11, and includes the following steps:
s1, placing the front end on a high-voltage side of a power grid, and placing the rear end on a low-voltage side of the power grid;
s2, transmitting fundamental frequency light from a low-voltage side of the power grid to a high-voltage side of the power grid;
s3, on the high-voltage side of the power grid, fundamental frequency light is converted into excitation laser through wavelength adjustment;
s4, the solid spin quantum probe senses a magnetic field generated by the electrified conductor and generates feedback fluorescence under the action of excitation laser;
and S5, collecting, analyzing and calculating the feedback fluorescence to obtain the to-be-measured value.
For the sake of understanding, taking fig. 12 as an example, the combined structure of the primary ring 6 and the electromagnetic shielding chamber 5 is a front end, the front end is placed on the high-voltage side of the electric network and supported by the insulator 3, the power-on conductor 7 passes through the inner hole of the primary ring, the laser in the rear end 2 emits 1064nm fundamental frequency light, and transmits the fundamental frequency light to the electromagnetic shielding chamber 5 through the transmission line 4, in which the fundamental frequency light is converted into 532nm excitation laser by the frequency doubling laser (wavelength conversion module), the solid spin quantum probe 13 (the sensing core is diamond NV color center) senses the magnetic field generated by the power-on conductor 5 and generates red feedback fluorescence under the action of 532nm excitation laser, and the current in the power-on conductor 7 can be obtained by calculating the feedback fluorescence.
Considering that the potential difference between the high-voltage side and the low-voltage side of the power grid is extremely large, electric signal transmission between the high-voltage side and the low-voltage side of the power grid is not suitable, otherwise, safety problems are easy to occur, and therefore, in some designs, the current transformer used in the current detection method is further limited, namely, no electric signal is transmitted between the front end and the rear end, and an exemplary limiting structure is designed in such a way that a photoelectric detection module is not designed at the front end, and feedback fluorescence is directly returned to the rear end through an optical fiber and then is processed; in another exemplary, further, restrictive structure design is that a photoelectric detection module and an optical transmitter are designed at the front end, and the feedback fluorescence is finally transmitted to the low-voltage side for processing by using an optical signal of a communication band through an optical-electrical-optical conversion process, and of course, when the electric equipment exists at the front end, front-end power supply (such as means of photovoltaic power supply, storage battery, cable non-contact power supply and the like) can be adopted, and power supply can also be carried out by using a laser power supply mode, so that circuit design is not allowed between the front end and the rear end.
As another detection scheme, the excitation microwave and the excitation laser can be used for exciting the solid spin quantum probe together to obtain feedback fluorescence.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the application disclosed above are intended only to assist in the explanation of the application. The preferred embodiments are not intended to be exhaustive or to limit the application to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and the practical application, to thereby enable others skilled in the art to best understand and utilize the application. The application is limited only by the claims and the full scope and equivalents thereof.
Claims (16)
1. The quantum transformer based on the anti-Stokes effect is characterized by comprising a front end, a rear end, an insulator and a transmission line connected between the front end and the rear end, wherein the insulator comprises an insulating channel for installing the transmission line, the rear end comprises a laser module and a processing unit, and the front end comprises a front end light path module, a wavelength conversion module and a solid spin quantum probe;
the laser module is used for outputting fundamental frequency light, and the processing unit is used for data processing and analysis;
the front-end optical path module is used for acquiring fundamental frequency light and adjusting and transmitting optical signals in the front end, the wavelength conversion module is used for converting the wavelength of the fundamental frequency light into excitation laser, and the solid-state spin quantum probe is used for generating feedback fluorescence under the action of the excitation laser.
2. The quantum transformer based on anti-stokes effect according to claim 1, wherein the front end comprises an optical intensity adjuster for adjusting the intensity of the excitation laser.
3. The quantum transformer based on anti-stokes effect according to claim 1, wherein the front end comprises a microwave module for outputting excitation microwaves acting on the solid state spin quantum probe.
4. The quantum transformer based on anti-stokes effect according to claim 1, wherein the front end comprises a photo detection processing module for collecting and processing feedback fluorescence to form an electrical signal output.
5. The quantum transformer based on anti-stokes effect according to claim 4, wherein the front end further comprises an optical transmitter, the optical transmitter is connected to the electrical signal output by the photoelectric detection processing module and generates a modulated optical signal output, the processing unit comprises an optical receiver and a host, the optical receiver is used for receiving and demodulating the modulated optical signal, and the host is used for processing and analyzing the signal demodulated and output by the optical receiver.
6. The quantum transformer based on the anti-stokes effect according to claim 1, wherein the wavelength interval of the fundamental frequency light is 800-1100 nm.
7. The quantum transformer based on anti-stokes effect according to claim 1, wherein the transmission line comprises an optical fiber through which optical signals transmitted between the front end and the back end are transmitted.
8. The quantum transformer based on anti-stokes effect according to claim 1, wherein the solid state spin quantum probe has 2n detection bits, and all detection bits are uniformly distributed on a virtual circumference.
9. The quantum transformer based on anti-stokes effect according to claim 1, wherein the front end further comprises an electromagnetic shielding chamber, part or all of the energized equipment located at the front end is installed in the electromagnetic shielding chamber, and the solid state spin quantum probe is located outside the electromagnetic shielding chamber.
10. The quantum transformer based on anti-stokes effect according to claim 1, wherein the front end further comprises a magnetic shielding ring, and the solid state spin quantum probe is located inside the magnetic shielding ring.
11. The quantum transformer based on anti-stokes effect according to claim 1, wherein the front end further comprises a magnetic concentrator, and the solid state spin quantum probe is positioned in a magnetic concentrating air gap of the magnetic concentrator.
12. The quantum transformer based on anti-stokes effect according to claim 11, wherein the magnetic concentrator is further provided with a feedback regulating coil, and the feedback regulating coil is used for regulating and controlling the magnetic field intensity in the magnetic concentrating air gap.
13. The quantum transformer based on the anti-stokes effect according to any one of claims 1-12, further comprising a photocell module for converting part of the fundamental frequency light into front-end electrical energy and powering electrical devices within the quantum sensing front-end.
14. The quantum transformer based on anti-stokes effect according to claim 13, wherein the front end further comprises a light recycling module for recycling unwanted light signals in the quantum sensing front end and converting the unwanted light signals into front end electrical energy by the photocell module.
15. A current detection method, characterized in that a quantum transformer based on anti-stokes effect according to any one of claims 1-14 is applied, comprising the steps of:
s1, placing the front end on a high-voltage side of a power grid, and placing the rear end on a low-voltage side of the power grid;
s2, transmitting fundamental frequency light from a low-voltage side of the power grid to a high-voltage side of the power grid;
s3, on the high-voltage side of the power grid, fundamental frequency light is converted into excitation laser through wavelength adjustment;
s4, the solid spin quantum probe senses a magnetic field generated by the electrified conductor and generates feedback fluorescence under the action of excitation laser;
and S5, collecting, analyzing and calculating the feedback fluorescence to obtain the to-be-measured value.
16. The method of claim 15, wherein no electrical signal is transmitted between the front end and the back end during the detection.
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