阅读说明：本技术 应用于水下航行体尾流诱发德拜磁场的发生接收系统 (Generating and receiving system applied to induced Debye magnetic field of wake flow of underwater vehicle ) 是由 卢向东 王学锋 刘院省 邓意成 于 2020-04-27 设计创作，主要内容包括：本发明涉及应用于水下航行体尾流诱发德拜磁场的发生接收系统,该接收系统包括发生装置和接收装置,其中发生装置包括磁屏蔽室、无磁动力机构、驱动机构、转动机构和无磁容器,无磁动力机构在驱动装置的驱动下带动转动机构进行旋转,推动邻近海水产生尾流,搅动海水中钠离子和氯离子诱发德拜磁场,接收装置的探头机构设置在该德拜磁场环境中,接收装置从探头机构产生的空间准直光中解算出德拜磁场信息；该发生接收系统产生德拜磁场,并实现了德拜磁场信息的精确测量。(The invention relates to a generating and receiving system for inducing a Debye magnetic field by wake flow of an underwater vehicle, which comprises a generating device and a receiving device, wherein the generating device comprises a magnetic shielding chamber, a non-magnetic power mechanism, a driving mechanism, a rotating mechanism and a non-magnetic container; the generating and receiving system generates a Debye magnetic field and realizes accurate measurement of the information of the Debye magnetic field.)

1. Be applied to underwater vehicle wake flow and induce the emergence receiving system of debye magnetic field, its characterized in that: the device comprises a generating device and a receiving device, wherein the generating device comprises a magnetic shielding room, a non-magnetic power mechanism, a driving mechanism, a rotating mechanism and a non-magnetic container, seawater is filled in the non-magnetic container, the rotating mechanism is arranged in the non-magnetic container, the non-magnetic container is arranged in the magnetic shielding room, the non-magnetic power mechanism is arranged in the magnetic shielding room and is positioned above the seawater of the non-magnetic container, the non-magnetic power mechanism drives the rotating mechanism to rotate under the driving of the driving device to push the adjacent seawater to generate a wake flow, and sodium ions and chloride ions in the seawater are stirred to induce a Debye magnetic field; the probe mechanism of the receiving device is arranged in the Debye magnetic field environment, and the receiving device resolves Debye magnetic field information from space collimated light generated by the probe mechanism.

2. The wake-induced Debye field generating and receiving system of claim 1, wherein: the non-magnetic container is of an open structure, and the cross section along the depth direction is of an equilateral trapezoid shape.

3. The wake-induced Debye field generating and receiving system of claim 2, wherein: two included angles of the equilateral trapezoid are 115-125 degrees.

4. The wake-induced Debye field generating and receiving system of claim 1, wherein: the rotating mechanism comprises two rotating shafts and propellers, the two rotating shafts are vertically installed, one end of one rotating shaft is connected with the propeller, and one end of the other rotating shaft is connected with the non-magnetic power mechanism.

5. The wake-induced Debye field generating and receiving system of claim 1, wherein: the driving mechanism comprises an electric motor driver and a function signal generator, the function signal generator sends the rotation frequency to the electric motor driver, and the electric motor driver drives the nonmagnetic power mechanism to drive the rotating mechanism to rotate according to the required frequency according to the rotation frequency.

6. The wake-induced Debye field generating and receiving system of claim 1, wherein: the rotating mechanism and the non-magnetic power mechanism are both made of non-magnetic titanium alloy materials; the non-magnetic power mechanism is a non-magnetic electric motor.

7. The wake-induced Debye field generating and receiving system of claim 1, wherein: the non-magnetic power mechanism is connected with the driving mechanism by a twisted pair so as to counteract the working current magnetic field generated by the two leads.

8. The wake-induced Debye field generating and receiving system of claim 1, wherein: the magnetic shielding room is a closed space, and the internal remanence is less than 5 nT.

9. The wake-induced Debye field generating and receiving system of claim 8, wherein: the magnetic shielding room is made of permalloy materials, and the number of layers of the permalloy materials is equal to or more than 4.

10. The wake-induced Debye field generating and receiving system of claim 1, wherein: the material of the non-magnetic container is non-magnetic glass.

11. The wake-induced Debye field generating and receiving system of claim 1, wherein: the receiving device comprises a control processor, a laser, a photoelectric detector and a probe mechanism, wherein the probe mechanism is arranged in a Debye magnetic field, the probe mechanism comprises two nonmagnetic optical fiber collimators, a temperature control mechanism and an atom air chamber, the control processor is connected with the laser and provides a driving current for the laser, the laser outputs two parallel double-linear polarized light beams, the two parallel double-linear polarized light beams enter the atom air chamber through one of the nonmagnetic optical fiber collimators and interact with atoms in the atom air chamber and are transmitted to the photoelectric detector through the other nonmagnetic optical fiber collimator, the photoelectric detector converts an optical signal into an electric signal and then transmits the electric signal to the control processor for resolving to obtain Debye magnetic field information, and the temperature control mechanism is used for heating the atom air chamber to a set temperature.

12. The wake-induced Debye field generating and receiving system of claim 11, wherein: the receiving mechanism further comprises a non-magnetic single-mode polarization maintaining optical fiber and a non-magnetic multi-mode optical fiber, wherein the laser is connected with the first non-magnetic optical fiber collimator through the non-magnetic single-mode polarization maintaining optical fiber, the first non-magnetic optical fiber collimator converts light transmitted by the non-magnetic single-mode polarization maintaining optical fiber into space collimated light and enters the atomic gas chamber, the non-magnetic multi-mode optical fiber is connected with the second non-magnetic optical fiber collimator, and the second non-magnetic optical fiber collimator couples the space collimated light in the atomic gas chamber to the optical fiber.

13. The wake-induced Debye field generating and receiving system of claim 11, wherein: the temperature control mechanism comprises a non-magnetic heating sheet and a thermistor, wherein the non-magnetic heating sheet is arranged on the outer wall surface of the atomic gas chamber and used for heating the atomic gas chamber, and the thermistor is connected with the atomic gas chamber and used for measuring the temperature of the atomic gas chamber.

14. The wake-induced Debye field generating and receiving system of claim 1, wherein: the non-magnetic heating sheet and the thermistor are both connected with the control processor through twisted pairs, the thermistor measures the temperature of the atomic gas chamber and feeds the temperature back to the control processor, and the control processor controls the non-magnetic heating sheet to heat the atomic gas chamber according to the temperature of the atomic gas chamber.

15. The wake-induced Debye magnetic field generator and receiver system as claimed in claim 11, wherein the atomic gas cell has a size of 25mm × 40mm or more⁸⁷An Rb atom; the temperature of the atomic gas chamber is controlled to be in a constant temperature state of 30-40 ℃.

Technical Field

The invention relates to a generating and receiving system for inducing a Debye magnetic field by wake flow of an underwater vehicle, belonging to the technical field of weak special magnetic field signal generation.

Background

Debye in 1933 proposed a method for determining the ionic mass of an electrolyte. It is assumed that the difference in the friction coefficient of each ion causes relative motion as the fluid particles accelerate. Thus, different charged species (e.g., ions) or solutions moving relative to each other generate an electromagnetic field of the same frequency as the acoustic source, which is the debye effect. By measuring the electric (or magnetic) field, the friction coefficient, and hence the ion mass, can be determined. Under the guidance of the theory, people in 1948 experimentally verified the existence of the debye electric field; experimental validation of the debye field was performed in 1980 by vhvlyanski et al.

The debye effect describes the electric and magnetic fields generated by the acceleration of fluid particles in an electrolyte solution. The relative separation of charged species is due to their kinetic reactions under the influence of time-varying water acoustic fields. Thus, when particles of different charges move relative to each other, alternating current density variations are induced. The corresponding magnetic and electric fields are defined by maxwell's equations. The debye effect is an electrokinetic phenomenon (also known as ionic vibrational potential when dealing with electric fields). Currently, the debye effect has been used as the basis for many measurement techniques in chemistry.

According to the debye effect, sea water with high salinity contains a large amount of sodium ions and chloride ions, the ions are charged and have different masses, current pulsation occurs in the sea water due to high-speed rotation of a propeller of a submarine or an underwater vehicle, and the pulsating current generates a low-frequency magnetic field related to the rotating speed frequency of the propeller in the sea water, and the magnetic field is a so-called debye magnetic field. Therefore, the underwater vehicle including the submarine generates a Debye magnetic field at any time in the moving process, the magnetic field is different from the remanence of the underwater vehicle including the submarine, the magnetic field cannot disappear by demagnetizing the underwater vehicle material, and the magnetic field is a 'shadow-following' magnetic field. Therefore, the method has an important application prospect in detecting the Debye magnetic field generated by the trail of the underwater vehicle.

Due to the inherent characteristic of very weak Debye magnetic field intensity, the technology which is not mature in the aspect of Debye magnetic field detection at home and abroad can be realized at present, and the system has important significance for deeply knowing various characteristics of the Debye magnetic field, applying the Debye magnetic field in the detection field, meeting engineering requirements and constructing a set of generation and receiving system for simulating the induced Debye magnetic field caused by wake flow of an underwater vehicle.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a generating and receiving system for inducing a Debye magnetic field by using wake flow of an underwater vehicle, the generating and receiving system generates the Debye magnetic field and realizes the accurate measurement of the information of the Debye magnetic field, and in addition, the system reduces the interference of structural materials and external magnetic fields on the Debye magnetic field induced by the wake flow of the underwater vehicle, thereby being beneficial to improving the signal-to-noise ratio of Debye magnetic field signals and improving the measurement accuracy.

The above purpose of the invention is mainly realized by the following technical scheme:

the generating and receiving system comprises a generating device and a receiving device, wherein the generating device comprises a magnetic shielding chamber, a non-magnetic power mechanism, a driving mechanism, a rotating mechanism and a non-magnetic container, seawater is filled in the non-magnetic container, the rotating mechanism is arranged in the non-magnetic container, the non-magnetic container is arranged in the magnetic shielding chamber, the non-magnetic power mechanism is arranged in the magnetic shielding chamber and is positioned above the seawater of the non-magnetic container, the non-magnetic power mechanism drives the rotating mechanism to rotate under the driving of the driving device to push the adjacent seawater to generate a wake flow, and sodium ions and chloride ions in the seawater are stirred to induce a Debye magnetic field; the probe mechanism of the receiving device is arranged in the Debye magnetic field environment, and the receiving device resolves Debye magnetic field information from space collimated light generated by the probe mechanism.

In the generating and receiving system for inducing the Debye magnetic field by the wake flow, the nonmagnetic container is of an open structure, and the section along the depth direction is of an equilateral trapezoid.

In the generating and receiving system of the wake-induced Debye magnetic field, two included angles of the equilateral trapezoids are 115-125 degrees.

In the generating and receiving system for inducing the Debye magnetic field by the wake flow, the rotating mechanism comprises two rotating shafts and propellers, the two rotating shafts are vertically arranged, one end of one rotating shaft is connected with the propeller, and one end of the other rotating shaft is connected with the non-magnetic power mechanism.

In the generating and receiving system for inducing the Debye magnetic field by the wake flow, the driving mechanism comprises an electric motor driver and a function signal generator, the function signal generator sends the rotation frequency to the electric motor driver, and the electric motor driver drives the nonmagnetic power mechanism to drive the rotating mechanism to rotate according to the required frequency according to the rotation frequency.

In the generating and receiving system of the wake flow induced Debye magnetic field, the rotating mechanism and the non-magnetic power mechanism are both made of non-magnetic titanium alloy materials; the non-magnetic power mechanism is a non-magnetic electric motor.

In the generating and receiving system of the wake-induced Debye magnetic field, the non-magnetic power mechanism and the driving mechanism are connected by a twisted pair so as to counteract the working current magnetic field generated by the two wires.

In the system for generating and receiving the wake-induced Debye magnetic field, the magnetic shielding room is a closed space, and the internal remanence is less than or equal to 5 nT.

In the generating and receiving system of the wake-induced Debye magnetic field, the magnetic shielding room is made of permalloy materials, and the number of layers of the permalloy materials is equal to or more than 4.

In the generating and receiving system of the wake-induced Debye magnetic field, the material of the nonmagnetic container is nonmagnetic glass.

In the generating and receiving system of the wake-induced Debye magnetic field, the receiving device comprises a control processor, a laser, a photoelectric detector and a probe mechanism, wherein the probe mechanism is arranged in the Debye magnetic field and comprises two nonmagnetic optical fiber collimators, a temperature control mechanism and an atomic gas chamber, the control processor is connected with the laser to provide driving current for the laser, the laser outputs two parallel double-linear polarized light beams, the two parallel double-linear polarized light beams enter the atomic gas chamber through one of the nonmagnetic optical fiber collimators, the temperature control mechanism is used for heating the atomic gas chamber to a set temperature.

In the generating and receiving system of the wake flow induced Debye magnetic field, the receiving mechanism further comprises a non-magnetic single-mode polarization maintaining optical fiber and a non-magnetic multimode optical fiber, wherein the laser is connected with a first non-magnetic optical fiber collimator through the non-magnetic single-mode polarization maintaining optical fiber, the first non-magnetic optical fiber collimator converts light transmitted by the non-magnetic single-mode polarization maintaining optical fiber into space collimated light and enters an atomic gas chamber, the non-magnetic multimode optical fiber is connected with a second non-magnetic optical fiber collimator, and the second non-magnetic optical fiber collimator couples the space collimated light in the atomic gas chamber to the optical fiber.

In the generating and receiving system of the wake flow induced Debye magnetic field, the temperature control mechanism comprises a non-magnetic heating sheet and a thermistor, wherein the non-magnetic heating sheet is arranged on the outer wall surface of the atomic gas chamber and used for heating the atomic gas chamber, and the thermistor is connected with the atomic gas chamber and used for measuring the temperature of the atomic gas chamber.

In the generating and receiving system of the wake-induced Debye magnetic field, the non-magnetic heating sheet and the thermistor are both connected with the control processor through the twisted pair, the thermistor measures the temperature of the atomic gas chamber and feeds the temperature back to the control processor, and the control processor controls the non-magnetic heating sheet to heat the atomic gas chamber according to the temperature of the atomic gas chamber.

In the generating and receiving system of the wake-induced Debye magnetic field, the size of the atomic gas chamber is more than or equal to 25mm × 40mm, and the atomic gas chamber is⁸⁷An Rb atom; the temperature of the atomic gas chamber is controlled to be in a constant temperature state of 30-40 ℃.

Compared with the prior art, the invention has the following beneficial effects:

(1) the invention provides a novel wake flow induced Debye magnetic field generating and receiving system, which comprises a generating device and a receiving device, wherein the generating device comprises a magnetic shielding chamber, a non-magnetic power mechanism, a driving mechanism, a rotating mechanism and a non-magnetic container, the non-magnetic power mechanism drives the rotating mechanism to rotate under the driving of the driving device to push adjacent seawater to generate a wake flow, sodium ions and chloride ions in the seawater are stirred to induce the Debye magnetic field, a probe mechanism of the receiving device is arranged in the Debye magnetic field environment, and the receiving device resolves Debye magnetic field information from space collimated light generated by the probe mechanism; the generation and receiving system generates a Debye magnetic field and realizes the accurate measurement of the information of the Debye magnetic field;

(2) the device provided by the invention has the advantages that the interference of the structural material and the external magnetic field on the Debye magnetic field induced by the wake flow of the underwater vehicle is reduced, the signal-to-noise ratio of the Debye magnetic field signal is favorably improved, and the measurement precision is obviously improved;

(3) in a preferred embodiment of the invention, the non-magnetic container of the generating device adopts a special structural design, preferably an equilateral trapezoid structure, so that a secondary interference magnetic field generated by collision of the wake flow with a glass wall in an underwater transmission process can be effectively reduced, and the precision is improved;

(4) in a preferred embodiment of the invention, the main body part of the generating device is made of non-magnetic titanium alloy material, so that the main body part does not interfere with the Debye magnetic field; the non-magnetic electric motor is connected with the electric motor driver by a twisted pair to offset the working current magnetic field generated by the two wires; the magnetic shielding room is made of a plurality of layers of permalloy materials, and the internal remanence of the magnetic shielding room is reduced to be below 5nT after being demagnetized by a demagnetizer;

(5) the receiving device provided by the invention adopts a coherent population number capturing method of a parallel double-line polarized light mode, the resolution of the receiving device can reach 0.001nT, the sampling rate is more than 10Hz, the detection requirement can be met, and the receiving device has the characteristics of high sensitivity of the detection magnetic field, simple structure, easiness in engineering realization and the like.

(6) The probe and the optical/cable in the receiving device have the characteristics of no magnetism, are waterproof and anticorrosive, and are convenient to use in seawater for a long time.

Drawings

FIG. 1 is a schematic view (sectional view) of the structure of a generating device of the present invention;

FIG. 2 is a schematic structural diagram of a generating device of the present invention, FIG. 2 (top view of FIG. 1);

FIG. 3 is a schematic structural diagram of a receiving device according to the present invention;

FIG. 4 is a block diagram of a receiving device according to the present invention;

FIG. 5 is a schematic diagram of coherent population trapping for a parallel double-linear polarized light mode of the present invention.

Detailed Description

The invention is described in further detail below with reference to the following figures and specific examples:

the invention is applied to a generating and receiving system of a Debye magnetic field induced by wake flow of an underwater vehicle, which comprises a generating device and a receiving device, and as shown in figure 1, the generating device is shown in a schematic structural diagram 1 (sectional view); FIG. 2 is a schematic structural diagram of a generating device of the present invention, FIG. 2 (top view of FIG. 1); the generating device comprises a magnetic shielding room, a non-magnetic power mechanism, a driving mechanism, a rotating mechanism and a non-magnetic container.

In an optional embodiment of the invention, the non-magnetic container is of an open structure, the cross section along the depth direction is an equilateral trapezoid, preferably, two included angles of the equilateral trapezoid are 115-125 degrees, and further preferably 120 degrees.

The non-magnetic container can be made of non-magnetic glass and filled with seawater.

The rotating mechanism comprises two rotating shafts and a propeller, the two rotating shafts are vertically arranged, one end of one rotating shaft is connected with the propeller, and one end of the other rotating shaft is connected with a nonmagnetic power mechanism.

The rotating mechanism and the non-magnetic power mechanism are both made of non-magnetic titanium alloy materials;

the driving mechanism comprises an electric motor driver and a function signal generator, the function signal generator sends the rotation frequency to the electric motor driver, and the electric motor driver drives the nonmagnetic power mechanism to drive the rotating mechanism to rotate according to the required frequency according to the rotation frequency.

The non-magnetic electric motor is connected with the electric motor driver by a twisted pair to offset the working current magnetic field generated by the two wires.

The magnetic shielding room is made of permalloy materials, the number of layers of the permalloy materials is equal to or more than 4, preferably 4, the magnetic shielding room is a closed space, and the internal remanence is less than 5 nT.

The rotating mechanism is arranged in the non-magnetic container, the non-magnetic container is arranged in the magnetic shielding chamber, the non-magnetic power mechanism is arranged in the magnetic shielding chamber and is positioned above the seawater of the non-magnetic container, when the function signal generator is arranged at a certain frequency, the electric motor driver transmits corresponding current to the non-magnetic electric motor through the twisted pair, so that the non-magnetic electric motor rotates according to a corresponding frequency value, the propeller rotates at a corresponding rotating speed in the seawater through the rotating shaft and pushes the seawater adjacent to the propeller to generate a wake flow, and the wake flow stirs sodium ions and chloride ions in the seawater in the area to induce a Debye magnetic field with certain characteristic attributes.

Because the strength of the magnetic field induced by the wake flow is very weak, a generator for simulating the magnetic field induced by the wake flow of the underwater vehicle needs to be placed in a non-magnetic environment to avoid the interference of the magnetic field induced by the wake flow of the underwater vehicle.

The generating device of the invention has the following characteristics:

1) the main body parts (such as the propeller, the rotating shaft, the non-magnetic electric motor and the supporting structure) of the Debye magnetic field generator induced by the wake flow of the underwater vehicle are all made of non-magnetic titanium alloy materials, and do not generate interference on the Debye magnetic field;

2) the nonmagnetic electric motor is connected with the electric motor driver by a twisted pair so as to counteract a working current magnetic field generated by the two leads;

3) in an optional embodiment of the invention, the magnetic shielding room is a closed space of 8m multiplied by 5.5m multiplied by 2m, and is made of four layers of permalloy materials, and the internal remanence of the magnetic shielding room is reduced to be below 5nT after being demagnetized by a demagnetizer;

4) in an optional embodiment of the invention, the glass cylinder body for placing the propeller is made of non-magnetic glass materials, and is in the shape of a long and narrow equilateral trapezoid with an included angle of 120 degrees, and the trapezoid structure can effectively reduce a secondary interference magnetic field generated by collision of wake flow with a glass wall in an underwater transmission process.

The probe mechanism of the receiving device is arranged in a Debye magnetic field environment, the receiving device resolves Debye magnetic field information from space collimated light generated by the probe mechanism, and the space collimated light is obtained after collimated parallel double-linear polarized light in the probe mechanism interacts with atoms in the atom air chamber.

Fig. 3 is a schematic structural diagram of a receiving device according to the present invention, and fig. 4 is a block diagram of the receiving device according to the present invention; it can be seen from the figure that the receiving device of the invention comprises an electronic box, an optical/electrical cable and a probe mechanism, wherein the probe mechanism consists of a first non-magnetic optical fiber collimator 5, a non-magnetic heating sheet 6, an atomic air chamber 7, a second non-magnetic optical fiber collimator 8 and a thermistor 9, and the non-magnetic heating sheet 6 and the thermistor 9 form a temperature control mechanism. The electronic box consists of a control processor 1, a laser 2, an optical fiber flange 3, a photoelectric detector 13 and an electric connector 14. The optical/electrical cable is composed of a twisted pair 11 for thermistor, a twisted pair 10 for non-magnetic heating plate, a non-magnetic single-mode polarization-maintaining optical fiber 4 and a non-magnetic multimode optical fiber 12. The probe and the optical/cable have the characteristics of no magnetism, and are waterproof and anticorrosive, so that the probe and the optical/cable can be conveniently used in seawater for a long time.

The probe mechanism is arranged in a Debye magnetic field generated by the generating device and comprises two non-magnetic optical fiber collimators, a temperature control mechanism and an atomic gas chamber, the control processor is connected with the laser and provides driving current for the laser 2, the laser 2 is connected with an optical fiber flange 3 through a non-magnetic single-mode polarization maintaining optical fiber 4, the optical fiber flange 3 is connected with a first non-magnetic optical fiber collimator 5 through the non-magnetic single-mode polarization maintaining optical fiber 4, the first non-magnetic optical fiber collimator 5 and a second non-magnetic optical fiber collimator 8 are both connected with the atomic gas chamber 7, a temperature control system consisting of a non-magnetic heating sheet 6 and a thermistor 9 is arranged on the outer wall surface of the atomic gas chamber 7, the second non-magnetic optical fiber collimator 8 is connected with a photoelectric detector 13 through a non-magnetic multimode optical fiber 12, and the photoelectric detector 13 is connected with the control processor 1. The control processor 1 is also connected to an electrical connector 14, and the electrical connector 14 is connected to the nonmagnetic heating plate 6 via a twisted pair 10 and to the thermistor 9 via a twisted pair 11.

In an optional embodiment of the invention, the laser 2 is a tail fiber type butterfly VCSEL laser, and the control processor 1 provides the laser 2 with a laser tube steady driving current, a laser tube constant temperature current and microwave modulation (for example, 3.417GHz microwave modulation) to enable the tail fiber type butterfly VCSEL laser 2 to obtain two parallel double-linear polarized light beams by controlling the laser 2 to output two beams of parallel double-linear polarized light beams by the control processor 1Two parallel double-linear polarized light beams are output (for example, two parallel double-linear polarized light beams with the frequency difference of 6.834 GHz). Two parallel double-linear polarized light beams enter a first magneto-optic fiber-free collimator 5 after passing through an optical fiber flange 3 and a non-magnetic single-mode polarization-maintaining optical fiber 4, the first magneto-optic fiber-free collimator 5 converts light transmitted by an optical fiber into space collimated light, the space collimated light enters an atom air chamber 7, and the two parallel double-linear polarized light beams interact with atoms in the atom air chamber 7 under the environment of a wake flow induced Debye magnetic field, for example⁸⁷An Rb atom.

The control processor 1 is connected to the non-magnetic heating sheet 6 via a twisted pair 10 for the non-magnetic heating sheet and to the thermistor 9 via a twisted pair 11 for the thermistor. The non-magnetic heating piece 6 tightly wrapping the atom air chamber 7 controls the temperature of the atom air chamber 7 in real time through the control processor 1, so that the temperature of the atom air chamber 7 is kept in a constant temperature state. In an optional embodiment of the invention, the temperature of the atomic gas chamber is controlled to be in a constant temperature state of 30-40 ℃, and the parallel double-linear polarized light are further promoted to be in a constant temperature state of the atomic gas chamber 7⁸⁷The interaction of Rb atoms and obtaining EIT peak optical signal output of wake-induced Debye magnetic field information under microwave modulation (e.g., 3.417GHz microwave modulation).

The EIT optical signal is coupled into a nonmagnetic multimode optical fiber 12 through a second nonmagnetic optical fiber collimator 8, the second nonmagnetic optical fiber collimator 8 is used for coupling space collimating light to the optical fiber and transmitting the space collimating light to a photoelectric detector 13 through the nonmagnetic multimode optical fiber 12, the photoelectric detector 13 is used for converting the optical signal into an electric signal, and the control processor 1 is used for solving the information of the wake flow induced Debye magnetic field.

To further promote parallel double-linear polarized light and⁸⁷the interaction of Rb atoms obtains EIT peak optical signals under the environment of wake-induced Debye magnetic field, and the size of the atomic gas chamber is more than or equal to phi 25mm × 40mm, so that the temperature of the atomic gas chamber is controlled at a constant temperature of 30-40 ℃.

The temperature control mechanism comprises a non-magnetic heating sheet 6 and a thermistor 9, wherein the non-magnetic heating sheet 6 is arranged on the outer wall surface of an atomic gas chamber 7 and is used for heating the atomic gas chamber 7, and the thermistor 6 is connected with the atomic gas chamber 7 and is used for measuring the temperature of the atomic gas chamber 7. In an optional embodiment of the invention, the non-magnetic heating sheet 6 and the thermistor 9 are both connected with the control processor 1 through a twisted pair, the thermistor 9 measures the temperature of the atomic gas chamber 7 and feeds the temperature back to the control processor 1, and the control processor 1 controls the non-magnetic heating sheet 6 to heat the atomic gas chamber 7 according to the temperature of the atomic gas chamber 7.

FIG. 5 is a schematic diagram of the coherent population trapping of the parallel dual-linear polarized light mode of the present invention, showing⁸⁷Rb atoms, for example, parallel double-linearly polarized light fields and⁸⁷rb atom ground and excited states 5²P_1/2F ═ 1 hyperfine energy state resonance. Wherein the ground state { | F_g＝l,m＝-1>,|F_g＝2,m＝l>}、{|F_g＝l,m＝l>,|F_g＝2,m＝-1>And a common excited state | F_e＝l,m＝0>Two coherent population-trapped state fabricated structures of type Λ (solid line type Λ)_g＝2,m＝-2>、|F_g＝l,m＝0>And | F_e＝l,m＝-1>}，{|F_g＝l,m＝0>、|F_g＝2,m＝2>And | F_e＝l,m＝l>Two Λ types of composition do not produce coherent population trapping states (dashed line Λ type) due to detuning, and the ground state two m-0 states and the excited state | F_e＝l,m＝l>、|F_e＝l,m＝-l>The two Λ forms and the two V forms also do not produce coherent population trapping states (dashed Λ forms and dashed V forms) due to destructive interference.

The above description is only for the best mode of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Those skilled in the art will appreciate that the invention may be practiced without these specific details.