All-optical partial discharge detection device based on Rydberg atoms

Abstract

The invention discloses an all-optical partial discharge detection device based on Rydberg atoms, and the device comprises a carrier, a cesium atom gas chamber, a detection light leading-in assembly, a detection light leading-out assembly, and a coupling light leading-in assembly. The cesium atom gas chamber, the detection light leading-in assembly, the detection light leading-out assembly and the coupling light leading-in assembly are all arranged on the carrier, detection light emitted by the detection light leading-in assembly enters the detection light leading-out assembly after passing through the cesium atom gas chamber, and light emitted by the coupling light leading-in assembly can enter the cesium atom gas chamber. According to the discharge detection device, all-optical nonmetal design is adopted, the cesium atom gas chamber, the detection light leading-in assembly, the detection light leading-out assembly and the coupling light leading-in assembly are subjected to small-size integrated design, response to an electromagnetic field is very sensitive, the response bandwidth is large, and the discharge detection device can be arranged in high-voltage equipment; in-situ and on-line real-time detection of the partial discharge phenomenon can be realized, and no influence is generated on high-voltage equipment.

Description

Technical Field

[0001] The invention relates to the technical field of discharge detection, and in particular to an all-optical partial discharge detection device based on Rydberg atoms. Background Art

[0002] Partial discharge refers to the phenomenon that when the electric field strength exceeds the local electric field tolerance limit of the material in the insulating material of the electrical equipment, ionization will occur in a small area of ​​the insulating medium, causing the charge to discharge locally for a short time, but this discharge is not enough to cause complete breakdown. Specifically, partial discharge usually occurs in the air gap inclusions or edge unevenness of the insulating material. These areas reduce the local breakdown voltage due to electric field distortion or weak insulation concentration, so that discharge will also occur under normal working voltage. Since partial discharge will accelerate the aging of the surrounding insulating medium and eventually lead to insulation breakdown, if it is not discovered in time, it will cause serious damage to the power system. Therefore, timely detection of partial discharge signals is crucial.

[0003] At present, the main methods for detecting partial discharge signals include high-frequency current coupling method, ultrasonic method, chemical method, optical measurement method, UHF detection method, etc. The high-frequency current coupling method can directly provide electrical parameters and is suitable for quantitative analysis, but it is easily affected by electromagnetic interference and has low sensitivity; the ultrasonic detection method can locate the position of partial discharge with high precision, but the signal attenuation is serious during the propagation process and will be affected by environmental noise; the chemical method quantifies the severity of partial discharge by detecting the gas composition near the insulator, but the measurement cycle is too long and cannot be detected online in real time; the optical measurement method can be built into high-voltage equipment for detection, but the optical signal propagates in a straight line and is easily blocked by obstacles; the UHF detection method can achieve higher sensitivity, but the measurement bandwidth is limited by the antenna size, and its metal material cannot be built into high-voltage equipment for measurement. It can be seen that the traditional measurement method still has some defects.

[0004] In recent years, the radio frequency field detection technology based on the quantum effect of Rydberg atoms has been continuously developed, and rich research results have been achieved in the field of microwave detection. Rydberg atoms refer to excited atoms with high principal quantum numbers. The higher the principal quantum number, the farther the electrons are from the nucleus. Therefore, Rydberg atoms have many excellent properties, including sensitive response to external fields, long radiation lifetime, maximum response bandwidth and electric dipole transition dipole moment. These advantages make them show great application potential in the fields of quantum computing, quantum communication, quantum sensing, etc.

[0005] The basic principle of Rydberg atom detection of partial discharge is as follows Figure 1 As shown, the cesium atom gas chamber 22 filled with cesium atoms is used as a sensing element, and the detection light 103 with a wavelength of 852nm converts the cesium atoms from the ground state (6S 1 / 2 ) is excited to the excited state (6P 3 / 2), the coupling light 104 with a wavelength of 510 nm converts the cesium atom from an excited state (6P 3 / 2 ) is excited to the Rydberg state. When the coupling light power is much stronger than the detection light power, quantum destructive interference occurs, and the original absorption of the detection light becomes transparent to the detection light (EIT effect). At this time, the electromagnetic field 101 generated by the partial discharge acts on the cesium atoms. Under the action of the external electromagnetic field, the energy level of the cesium atoms moves (AC-Stark effect), thereby affecting the EIT phenomenon, and the absorption of the detection light changes again. By detecting the change in the intensity of the detection light, the partial discharge signal is detected.

[0006] However, in the prior art, there is no integrated product based on the principle of Rydberg atom detection of partial discharge, which restricts its development and application.

[0007] In view of this, the present invention is proposed. Summary of the invention

[0008] In order to solve one of the above technical problems, an embodiment of the present application provides an all-optical partial discharge detection device based on Rydberg atoms.

[0009] The present invention adopts the following technical solutions:

[0010] An all-optical partial discharge detection device based on Rydberg atoms, comprising:

[0011] A carrier, wherein the carrier is an integral structure;

[0012] A cesium atom gas chamber, wherein the cesium atom gas chamber is disposed on the carrier;

[0013] A detection light introduction component, wherein the detection light introduction component is arranged on the carrier;

[0014] A detection light extraction component, wherein the detection light extraction component is arranged on the carrier, and the detection light emitted by the detection light introduction component passes through the cesium atom gas chamber and then enters the detection light extraction component;

[0015] A coupling light introduction component is arranged on the carrier, and the light emitted through the coupling light introduction component can be incident on the cesium atom gas chamber.

[0016] Optionally, the detection light introduction component includes:

[0017] Probe light sleeve collimator;

[0018] A detection light polarization-maintaining optical fiber, wherein the detection light polarization-maintaining optical fiber is connected to the detection light sleeve collimator;

[0019] A detection light polarization beam splitter prism, wherein the detection light polarization beam splitter prism is located between the detection light sleeve collimator and the cesium atomic gas chamber, and the detection light emitted by the detection light sleeve collimator passes through the detection light polarization beam splitter prism and then enters the cesium atomic gas chamber;

[0020] The coupling light introduction component comprises:

[0021] Coupling light tube collimator;

[0022] A coupled light polarization-maintaining optical fiber, wherein the coupled light polarization-maintaining optical fiber is connected to the coupled light sleeve collimator;

[0023] A coupling light polarization beam splitter prism is provided between the coupling light sleeve collimator and the cesium atom gas chamber. The detection light emitted by the coupling light sleeve collimator passes through the coupling light polarization beam splitter prism and then enters the cesium atom gas chamber.

[0024] Optionally, the detection light extraction component and the detection light introduction component are located on opposite sides of the cesium atom gas chamber;

[0025] The detection light lead-out assembly comprises: a first dichroic mirror, a lead-out high-reflection lens, a lead-out sleeve collimator and a lead-out polarization-maintaining optical fiber, wherein the lead-out sleeve collimator and the lead-out polarization-maintaining optical fiber are connected;

[0026] The detection light emitted from the cesium atomic gas chamber is reflected by the first dichroic mirror to the extraction high-reflection lens, and is reflected by the extraction high-reflection lens to the extraction sleeve collimator;

[0027] The beam waist position of the detection light emitted from the detection light sleeve collimator is located in the middle of the light path from the detection light sleeve collimator to the lead-out sleeve collimator.

[0028] Optionally, the beam waist position of the detection light coincides with the center of the cesium atom gas chamber.

[0029] Optionally, the all-optical partial discharge detection device based on Rydberg atoms includes a detection light detection component;

[0030] The detection light detection component is arranged on the carrier;

[0031] The detection light detection assembly comprises a detection light beam splitter prism, a detection light high reflector, a detection light detection sleeve collimator and a detection light detection polarization-maintaining optical fiber, and the detection light detection sleeve collimator and the detection light detection polarization-maintaining optical fiber are connected;

[0032] The detection light beam splitter prism is located between the detection light polarization beam splitter prism and the cesium atom gas chamber;

[0033] After the detection light is incident on the detection light splitter prism through the detection light polarization splitter prism, part of the light is reflected to the detection light high reflector and reflected to the detection light detection sleeve collimator, and part of the light is incident on the cesium atomic gas chamber.

[0034] Optionally, the detection light beam splitter prism and the detection light high reflector are arranged symmetrically with the first symmetry line as the center line;

[0035] In the direction along the first symmetry line, the distance between the detection light sleeve collimator and the detection light beam splitter prism is greater than the distance between the detection light detection sleeve collimator and the detection light high reflector.

[0036] Optionally, the all-optical partial discharge detection device based on Rydberg atoms includes a coupled light detection component;

[0037] The coupled light detection component is arranged on the carrier;

[0038] The coupled light detection assembly comprises a coupled light beam splitter prism, a coupled light high reflector, a coupled light detection sleeve collimator and a coupled light detection polarization-maintaining optical fiber, and the coupled light detection sleeve collimator and the coupled light detection polarization-maintaining optical fiber are connected;

[0039] The coupling light beam splitter prism is located between the coupling light polarization beam splitter prism and the cesium atom gas chamber;

[0040] After the coupling light is incident on the coupling light splitter prism through the coupling light polarization splitter prism, part of the light is reflected to the coupling light high reflector and reflected to the coupling light detection sleeve collimator, and part of the light is incident on the cesium atomic gas chamber.

[0041] Optionally, the coupling light beam splitter prism and the coupling light high reflector are arranged symmetrically with the second symmetry line as the center line;

[0042] In the direction along the second symmetry line, the distance between the coupling light sleeve collimator and the coupling light beam splitter prism is greater than the distance between the coupling light detection sleeve collimator and the coupling light high reflector.

[0043] Optionally, the all-optical partial discharge detection device comprises a first light barrier and a second light barrier;

[0044] The first light barrier and the second light barrier are both disposed on the carrier;

[0045] The first light shielding plate and the second light shielding plate are respectively arranged on two sides of the cesium atom gas chamber;

[0046] The coupling light emitted from the cesium atom gas chamber is incident on the first light baffle;

[0047] Of the two light beams emitted from the coupled light polarization splitter prism, one light beam is directed toward the cesium atom gas chamber, and the other light beam is incident on the second light blocking plate.

[0048] Optionally, the all-optical partial discharge detection device comprises a second dichroic mirror;

[0049] The second dichroic mirror is disposed on the carrier, and is located between the detection light beam splitter prism and the cesium atomic gas chamber. The detection light transmitted through the detection light beam splitter prism is incident on the cesium atomic gas chamber through the second dichroic mirror, and the coupling light emitted from the cesium atomic gas chamber is reflected by the second dichroic mirror and then incident on the first light baffle.

[0050] The first dichroic mirror is disposed between the coupling light beam splitter prism and the cesium atom gas cell, and the coupling light transmitted through the coupling light beam splitter prism is incident on the cesium atom gas cell through the first dichroic mirror.

[0051] By adopting the above technical solution, the present invention has the following beneficial effects:

[0052] The all-optical partial discharge detection device of the present application adopts an all-optical non-metallic design, and integrates the cesium atomic gas chamber, the detection light introduction component, the detection light extraction component and the coupling light introduction component into a small integrated design. It is very sensitive to the electromagnetic field and has a large response bandwidth. It can be built into high-voltage equipment, and can realize in-situ, online real-time detection of partial discharge phenomena without affecting the high-voltage equipment.

[0053] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The accompanying drawings are part of this application and are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0055] Figure 1 A schematic diagram of all-optical partial discharge monitoring based on Rydberg atoms provided in an embodiment of the present application is shown;

[0056] Figure 2 A schematic structural diagram of an all-optical partial discharge detection device based on Rydberg atoms provided in an embodiment of the present application is shown;

[0057] Figure 3The diagram shows an EIT signal spectrum obtained by measuring the detection light output by the detection light extraction component of the all-optical partial discharge detection device based on Rydberg atoms provided by an embodiment of the present application.

[0058] In the figure: 1. detection light polarization-maintaining fiber; 2. detection light polarization-maintaining fiber; 3. lead-out polarization-maintaining fiber; 4. coupling light polarization-maintaining fiber; 5. coupling light polarization-maintaining fiber; 6. detection light sleeve collimator; 7. detection light sleeve collimator; 8. lead-out sleeve collimator; 9. coupling light sleeve collimator; 10. coupling light sleeve collimator; 11. detection light polarization splitter prism; 12. coupling light polarization splitter prism; 13. detection light splitter prism; 14. coupling light splitter prism; 15. detection light high reflector; 16. coupling light high reflector; 17. coupling light high reflector; 18. second dichroic mirror; 19. first dichroic mirror; 20. second light baffle; 21. first light baffle; 22. cesium atom gas chamber; 23. carrier; 101. electromagnetic field; 103. detection light; 104. coupling light.

[0059] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0061] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0062] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] See also Figure 2 and Figure 3As shown, the embodiment of the present application provides an all-optical partial discharge detection device based on Rydberg atoms, including: a carrier 23, a cesium atom gas chamber 22, a detection light introduction component, a detection light extraction component and a coupling light introduction component. The carrier 23 is an integrated structure, the cesium atom gas chamber 22 is arranged on the carrier 23, the detection light introduction component is arranged on the carrier 23, the detection light extraction component is arranged on the carrier 23, the detection light emitted by the detection light introduction component passes through the cesium atom gas chamber 22 and then enters the detection light extraction component, the coupling light introduction component is arranged on the carrier 23, and the light (coupling light) emitted by the coupling light introduction component can enter the cesium atom gas chamber 22.

[0064] In the embodiment of the present application, the carrier 23 is an integrated structure, which can be understood as the carrier 23 is an integrally formed part. The carrier 23 can also be an integrated structure formed by fixing multiple parts through a connecting structure. In short, the carrier 23 cannot be composed of multiple separate parts.

[0065] The all-optical partial discharge detection device of the present application adopts an all-optical non-metallic design, and integrates the cesium atomic gas chamber 22, the detection light introduction component, the detection light extraction component and the coupling light introduction component into a small integrated design. It is very sensitive to the electromagnetic field 101 and has a large response bandwidth. It can be built into high-voltage equipment, and can realize in-situ, online real-time detection of partial discharge phenomena without affecting the high-voltage equipment.

[0066] like Figure 2 As shown, the detection light introduction component includes: a detection light sleeve collimator 6, a detection light polarization-maintaining optical fiber 1 and a detection light polarization splitter prism 11. The detection light polarization-maintaining optical fiber 1 is connected to the detection light sleeve collimator 6. The detection light polarization splitter prism 11 is located between the detection light sleeve collimator 6 and the cesium atomic gas chamber 22. The detection light emitted by the detection light sleeve collimator 6 passes through the detection light polarization splitter prism 11 and then enters the cesium atomic gas chamber 22.

[0067] The coupling light introduction component includes: a coupling light sleeve collimator 10, a coupling light polarization-maintaining optical fiber 5, and a coupling light polarization beam splitter prism 12. The coupling light polarization-maintaining optical fiber 5 is connected to the coupling light sleeve collimator 10, and the coupling light polarization beam splitter prism 12 is located between the coupling light sleeve collimator 10 and the cesium atomic gas chamber 22. The detection light emitted by the coupling light sleeve collimator 10 passes through the coupling light polarization beam splitter prism 12 and then enters the cesium atomic gas chamber 22.

[0068] Wherein, the detection light can be 852nm detection light, the detection light sleeve collimator 6 is an 852nm glass sleeve collimator, and the detection light emitted by the 852nm glass sleeve collimator (detection light sleeve collimator 6) is spatial light, and the spot diameter is about 200μm. The detection light polarization-maintaining fiber 1 is an 852nm polarization-maintaining fiber, and the detection light polarization beam splitter prism 11 can be an 852nm PBS (polarization beam splitter prism). The coupling light can be 510nm coupling light, the coupling light sleeve collimator 10 can be a 510nm glass sleeve collimator, the coupling light polarization-maintaining fiber 5 can be a 510nm polarization-maintaining fiber, and the coupling light polarization beam splitter prism 12 can be a 510nm PBS (polarization beam splitter prism). The polarization beam splitter prism is used to purify the polarization direction of the light, so that the polarization of the light is determined during the operation of the all-optical partial discharge detection device.

[0069] In some possible implementation schemes, the detection light extraction component and the detection light introduction component are located on opposite sides of the cesium atomic gas chamber 22, and the detection light extraction component includes: a first dichroic mirror 19, an extraction high-reflection lens 16, an extraction sleeve collimator 8 and an extraction polarization-maintaining optical fiber 3, wherein the extraction sleeve collimator 8 and the extraction polarization-maintaining optical fiber 3 are connected, and the detection light emitted from the cesium atomic gas chamber 22 is reflected to the extraction high-reflection lens 16 via the first dichroic mirror 19, and is reflected to the extraction sleeve collimator 8 by the extraction high-reflection lens 16, wherein the beam waist position of the detection light emitted by the detection light sleeve collimator 6 is located in the middle position of the optical path from the detection light sleeve collimator 6 to the extraction sleeve collimator 8. The extraction polarization-maintaining optical fiber 3 is used to connect to the detection equipment, and the detection equipment can detect the local discharge signal by detecting the detection light signal emitted by the extraction polarization-maintaining optical fiber 3 of 852nm. Figure 3 This is an EIT signal spectrum diagram obtained by detecting the detection light signal emitted from the polarization-maintaining optical fiber 3 detected by the detection equipment.

[0070] The waist position of the detection light emitted by the detection light sleeve collimator 6 is the center of the geometric path of the detection light propagating in the EIT main optical path as spatial light. The light beams of the detection light on both sides of the waist position are symmetrical, so that the spot diameters of the detection light at the detection light sleeve collimator 6 and the lead-out sleeve collimator 8 are equal, which is conducive to achieving higher detection light utilization efficiency.

[0071] In some possible implementations, the waist position of the detection light coincides with the center of the cesium atom gas chamber 22. By arranging the various structural components of the detection light introduction component and the detection light extraction component, the waist position of the detection light is located at the center of the cesium atom gas chamber 22, and the beam expansion of the waist position to both ends is symmetrical, and the light is symmetrical, so that the spot diameter of the detection light at the sleeve collimator 6 and the extraction sleeve collimator 8 is consistent, so that the extraction sleeve collimator 8 has a higher coupling efficiency, thereby better utilizing the light and avoiding waste. By locating the waist position of the detection light at the center of the cesium atom gas chamber 22, the distribution of the detection light in the cesium atom gas chamber 22 is more symmetrical, which is conducive to improving reliability.

[0072] In some possible implementation schemes, the all-optical partial discharge detection device based on Rydberg atoms includes a detection light detection component, which is arranged on the carrier 23. The detection light detection component includes a detection light beam splitter prism 13, a detection light high reflector 15, a detection light detection sleeve collimator 7 and a detection light detection polarization-maintaining optical fiber 2. The detection light detection sleeve collimator 7 and the detection light detection polarization-maintaining optical fiber 2 are connected. The detection light beam splitter prism 13 is located between the detection light polarization beam splitter prism 11 and the cesium atomic gas chamber 22. After the detection light is incident on the detection light beam splitter prism 13 through the detection light polarization beam splitter prism 11, part of the light is reflected to the detection light high reflector 15 and reflected to the detection light detection sleeve collimator 7, and part of the light is incident on the cesium atomic gas chamber 22.

[0073] The output end of the detection light detection polarization-maintaining optical fiber 2 can be connected to a power monitoring device to monitor whether the power of the detection light is stable, thereby forming a power feedback mechanism. The detection light polarization-maintaining optical fiber 1 can be connected to the detection light transmitter, and the power monitoring device can be connected to the detection light transmitter data. The power monitoring device is used to feedback the power change, and the detection light transmitter is adjusted in real time according to the power change, that is, PID control is realized, so that the power of the detection light is kept as constant as possible.

[0074] The detection light beam splitter prism 13 can be a BS (90:10) beam splitter prism of 852nm, that is, 90% of the incident light can pass through the detection light beam splitter prism 13, and 10% of the light will be reflected to the detection light high reflector 15. The detection light beam splitter prism 13 and the detection light high reflector 15 are both at an angle of 45 degrees to the first symmetry line. The detection light detection sleeve collimator 7 can be an 852nm glass sleeve collimator, and the detection light detection polarization-maintaining fiber 2 can be an 852nm polarization-maintaining fiber.

[0075] In some possible implementation schemes, the detection light beam splitter prism 13 and the detection light high reflector 15 are symmetrically arranged with a first symmetry line as the center line, and in the direction along the first symmetry line, the distance between the detection light sleeve collimator 6 and the detection light beam splitter prism 13 is greater than the distance between the detection light detection sleeve collimator 7 and the detection light high reflector 15.

[0076] The detection light detection sleeve collimator 7 is closer to the cesium atomic gas chamber 22 than the detection light sleeve collimator 6. The spot diameter of the detection light emitted by the detection light sleeve collimator 6 gradually decreases within a certain range (before the beam waist position). By setting the detection light detection sleeve collimator 7 further inward, although the detection light detection sleeve collimator 7 and the detection light sleeve collimator 6 cannot be aligned, the light gathering is reduced, so that the light spot is coupled out before it is gathered too fine.

[0077] In some possible embodiments, the all-optical partial discharge detection device based on Rydberg atoms includes a coupled light detection component, which is arranged on the carrier 23. The coupled light detection component includes a coupled light beam splitter prism 14, a coupled light high reflector 17, a coupled light detection sleeve collimator 9 and a coupled light detection polarization-maintaining optical fiber 4. The coupled light detection sleeve collimator 9 and the coupled light detection polarization-maintaining optical fiber 4 are connected. The coupled light beam splitter prism 14 is located between the coupled light polarization beam splitter prism 12 and the cesium atomic gas chamber 22. After the coupled light is incident on the coupled light beam splitter prism 14 through the coupled light polarization beam splitter prism 12, part of the light is reflected to the coupled light high reflector 17 and reflected to the coupled light detection sleeve collimator 9, and part of the light is incident on the cesium atomic gas chamber 22.

[0078] The principles of the coupled light detection component and the detection light detection component are roughly the same. The output end of the coupled light detection polarization-maintaining fiber 4 can be connected to a power monitoring device to monitor whether the power of the coupled light is stable, thereby forming a power feedback mechanism. The coupled light polarization-maintaining fiber 5 can be connected to the coupled light transmitter. The power monitoring device can be connected to the data of the coupled light transmitter. The power monitoring device is used to feedback the power change. The coupled light transmitter adjusts in real time according to the power change, that is, PID control is realized, so that the power of the coupled light is kept as constant as possible.

[0079] The coupling light beam splitter prism 14 can be a 510nm BS (90:10) beam splitter prism, that is, 90% of the incident light can pass through the coupling light beam splitter prism 14, and 10% of the light will be reflected to the coupling light high reflector 17. The coupling light high reflector 17 and the coupling light beam splitter prism 14 are both at an angle of 45 degrees to the second symmetry line. The coupling light detection sleeve collimator 9 can be a 510nm glass sleeve collimator, and the coupling light detection polarization-maintaining fiber 4 can be a 510nm polarization-maintaining fiber. The first symmetry line and the second symmetry line are parallel.

[0080] In some possible embodiments, the coupling light beam splitter prism 14 and the coupling light high reflector 17 are symmetrically arranged with the second symmetry line as the center line, and in the direction along the second symmetry line, the distance between the coupling light sleeve collimator 10 and the coupling light beam splitter prism 14 is greater than the distance between the coupling light detection sleeve collimator 9 and the coupling light high reflector 17.

[0081] The coupling light detection sleeve collimator 9 is closer to the cesium atomic gas chamber 22 than the coupling light sleeve collimator 10. The coupling light emitted by the coupling light sleeve collimator 10 has a reduced spot diameter component within a certain range (before the beam waist position). By setting the coupling light detection sleeve collimator 9 further inward, although the coupling light detection sleeve collimator 9 and the coupling light sleeve collimator 10 cannot be aligned, the light is reduced in concentration, so that the spot is not too fine and is coupled out.

[0082] In some possible implementations, such as Figure 2 As shown, the all-optical partial discharge detection device includes a first light baffle 21 and a second light baffle 20, both of which are arranged on the carrier 23, and the first light baffle 21 and the second light baffle 20 are respectively arranged on both sides of the cesium atom gas chamber 22, and the coupling light emitted from the cesium atom gas chamber 22 is incident on the first light baffle 21. Among the two light beams emitted from the coupling light polarization splitter prism 12, one light beam (detection light beam) is directed toward the cesium atom gas chamber 22, and the other light beam is incident on the second light baffle 20.

[0083] By disposing the first light blocking plate 21 and the second light blocking plate 20, all the light in the all-optical partial discharge detection device can be absorbed and shielded, and the problem of light leakage will not occur.

[0084] In some possible schemes, the all-optical partial discharge detection device includes a second dichroic mirror 18, which is arranged on the carrier 23, and the second dichroic mirror 18 is located between the detection light beam splitter prism 13 and the cesium atomic gas chamber 22. The detection light transmitted through the detection light beam splitter prism 13 is incident on the cesium atomic gas chamber 22 through the second dichroic mirror 18, and the coupling light emitted from the cesium atomic gas chamber 22 is reflected by the second dichroic mirror 18 and is incident on the first light baffle 21. The first dichroic mirror 19 is arranged between the coupling light beam splitter prism 14 and the cesium atomic gas chamber 22, and the coupling light transmitted through the coupling light beam splitter prism 14 is incident on the cesium atomic gas chamber 22 through the first dichroic mirror 19.

[0085] In this embodiment, each component on each carrier 23 is integrated, and the second dichroic mirror 18 is arranged between the detection light beam splitter prism 13 and the cesium atomic gas chamber 22, and the first dichroic mirror 19 is arranged between the coupling light beam splitter prism 14 and the cesium atomic gas chamber 22, so as to make full use of the space of the carrier 23. However, there will be a problem of blocking light at the same time. In view of this, the present application selects a dichroic mirror, which can solve the corresponding problem and realize a compact integrated design. Specifically, the second dichroic mirror 18 is a 852nm high-transmittance 510nm high-reflection dichroic mirror. The detection light can pass through the second dichroic mirror 18 and be incident on the cesium atomic gas chamber 22, and the second dichroic mirror 18 has little effect on the detection light. The second dichroic mirror 18 is located on the optical path of the coupling light, and the coupling light emitted by the cesium atomic gas chamber 22 is incident on the second dichroic mirror 18 and can be reflected by the second dichroic mirror 18 to the first light baffle 21. Similarly, the first dichroic mirror 19 is a 510nm high-transmittance 852nm high-reflection dichroic mirror. The coupled light can directly pass through the first dichroic mirror 19 and be incident on the cesium atomic gas chamber 22. The first dichroic mirror 19 is located on the optical path of the detection light. The detection light emitted from the cesium atomic gas chamber 22 can be directly incident on the first dichroic mirror 19. The first dichroic mirror 19 reflects the detection light to the high-reflection lens 16.

[0086] In the embodiment of the present application, when the 852nm detection light emitted by the detection light introduction component passes through the cesium atom gas chamber 22, the cesium atoms in the cesium atom gas chamber 22 are converted from the ground state (6S 1 / 2 ) is excited to the excited state (6P 3 / 2 ), the 510nm coupling light will drive the cesium atom from the excited state (6P 3 / 2 ) is excited to the Rydberg state, and the two beams overlap and pass through the cesium atom gas chamber 22 with opposite polarization directions. When the coupling light power is much stronger than the detection light power, quantum destructive interference will occur, so that the 852nm detection light will not be absorbed by the atoms even at the resonance frequency (EIT effect), which is specifically manifested as the change in the intensity of the detection light after passing through the cesium atom gas chamber 22. Figure 3 As shown, it is the EIT signal spectrum actually measured in this application. When the all-optical partial discharge detection device based on Rydberg atoms is placed in the electromagnetic field 101 generated by partial discharge, the energy level of the cesium atoms in the cesium atom gas chamber 22 will move under the action of the external electromagnetic field 101 (AC-Stark effect), which will affect the EIT phenomenon, which is specifically manifested as the change in the light intensity of the detection light after passing through the cesium atom gas chamber 22. By detecting the detection light signal emitted by the 852nm polarization-maintaining optical fiber (leading out the polarization-maintaining optical fiber 3), the partial discharge signal can be detected.

[0087] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. An all-optical partial discharge detection device based on Rydberg atoms, characterized in that: include: A carrier, wherein the carrier is an integral structure; A cesium atom gas chamber, wherein the cesium atom gas chamber is disposed on the carrier; A detection light introduction component, wherein the detection light introduction component is arranged on the carrier; A detection light extraction component, wherein the detection light extraction component is arranged on the carrier, and the detection light emitted by the detection light introduction component passes through the cesium atom gas chamber and then enters the detection light extraction component; A coupling light introduction component is arranged on the carrier, and the light emitted through the coupling light introduction component can be incident on the cesium atom gas chamber.

2. The all-optical partial discharge detection device based on Rydberg atoms according to claim 1, characterized in that: The detection light introduction component comprises: Probe light sleeve collimator; A detection light polarization-maintaining optical fiber, wherein the detection light polarization-maintaining optical fiber is connected to the detection light sleeve collimator; A detection light polarization beam splitter prism, wherein the detection light polarization beam splitter prism is located between the detection light sleeve collimator and the cesium atomic gas chamber, and the detection light emitted by the detection light sleeve collimator passes through the detection light polarization beam splitter prism and then enters the cesium atomic gas chamber; The coupling light introduction component comprises: Coupling light tube collimator; A coupled light polarization-maintaining optical fiber, wherein the coupled light polarization-maintaining optical fiber is connected to the coupled light sleeve collimator; A coupling light polarization beam splitter prism is provided between the coupling light sleeve collimator and the cesium atom gas chamber. The detection light emitted by the coupling light sleeve collimator passes through the coupling light polarization beam splitter prism and then enters the cesium atom gas chamber.

3. The all-optical partial discharge detection device based on Rydberg atoms according to claim 2, characterized in that: The detection light extraction component and the detection light introduction component are located at opposite sides of the cesium atom gas chamber; The detection light lead-out assembly comprises: a first dichroic mirror, a lead-out high-reflection lens, a lead-out sleeve collimator and a lead-out polarization-maintaining optical fiber, wherein the lead-out sleeve collimator and the lead-out polarization-maintaining optical fiber are connected; The detection light emitted from the cesium atomic gas chamber is reflected by the first dichroic mirror to the extraction high-reflection lens, and is reflected by the extraction high-reflection lens to the extraction sleeve collimator; The beam waist position of the detection light emitted from the detection light sleeve collimator is located in the middle of the light path from the detection light sleeve collimator to the lead-out sleeve collimator.

4. The all-optical partial discharge detection device based on Rydberg atoms according to claim 3, characterized in that: The beam waist position of the detection light coincides with the center of the cesium atom gas chamber.

5. The all-optical partial discharge detection device based on Rydberg atoms according to claim 3, characterized in that: including a detection light detection assembly; The detection light detection component is arranged on the carrier; The detection light detection assembly comprises a detection light beam splitter prism, a detection light high reflector, a detection light detection sleeve collimator and a detection light detection polarization-maintaining optical fiber, and the detection light detection sleeve collimator and the detection light detection polarization-maintaining optical fiber are connected; The detection light beam splitter prism is located between the detection light polarization beam splitter prism and the cesium atom gas chamber; After the detection light is incident on the detection light splitter prism through the detection light polarization splitter prism, part of the light is reflected to the detection light high reflector and reflected to the detection light detection sleeve collimator, and part of the light is incident on the cesium atomic gas chamber.

6. The all-optical partial discharge detection device based on Rydberg atoms according to claim 5, characterized in that: The detection light beam splitting prism and the detection light high reflector are arranged symmetrically with the first symmetry line as the center line; In the direction along the first symmetry line, the distance between the detection light sleeve collimator and the detection light beam splitter prism is greater than the distance between the detection light detection sleeve collimator and the detection light high reflector.

7. The all-optical partial discharge detection device based on Rydberg atoms according to claim 5, characterized in that: including a coupled light detection assembly; The coupled light detection component is arranged on the carrier; The coupled light detection assembly comprises a coupled light beam splitter prism, a coupled light high reflector, a coupled light detection sleeve collimator and a coupled light detection polarization-maintaining optical fiber, and the coupled light detection sleeve collimator and the coupled light detection polarization-maintaining optical fiber are connected; The coupling light beam splitter prism is located between the coupling light polarization beam splitter prism and the cesium atom gas chamber; After the coupling light is incident on the coupling light splitter prism through the coupling light polarization splitter prism, part of the light is reflected to the coupling light high reflector and reflected to the coupling light detection sleeve collimator, and part of the light is incident on the cesium atomic gas chamber.

8. The all-optical partial discharge detection device based on Rydberg atoms according to claim 7, characterized in that: The coupling light beam splitter prism and the coupling light high reflector are arranged symmetrically with the second symmetry line as the center line; In the direction along the second symmetry line, the distance between the coupling light sleeve collimator and the coupling light beam splitter prism is greater than the distance between the coupling light detection sleeve collimator and the coupling light high reflector.

9. The all-optical partial discharge detection device based on Rydberg atoms according to claim 8, characterized in that: comprising a first light barrier and a second light barrier; The first light barrier and the second light barrier are both disposed on the carrier; The first light shielding plate and the second light shielding plate are respectively arranged on two sides of the cesium atom gas chamber; The coupling light emitted from the cesium atom gas chamber is incident on the first light baffle; Of the two light beams emitted from the coupled light polarization splitter prism, one light beam is directed toward the cesium atom gas chamber, and the other light beam is incident on the second light blocking plate.

10. The all-optical partial discharge detection device based on Rydberg atoms according to claim 9, characterized in that: including a second dichroic mirror; The second dichroic mirror is disposed on the carrier, and is located between the detection light beam splitter prism and the cesium atomic gas chamber. The detection light transmitted through the detection light beam splitter prism is incident on the cesium atomic gas chamber through the second dichroic mirror, and the coupling light emitted from the cesium atomic gas chamber is reflected by the second dichroic mirror and then incident on the first light baffle. The first dichroic mirror is disposed between the coupling light beam splitter prism and the cesium atom gas cell, and the coupling light transmitted through the coupling light beam splitter prism is incident on the cesium atom gas cell through the first dichroic mirror.

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