Detection system and detection method for Debye magnetic field induced by underwater vehicle
阅读说明：本技术 一种水下航行体诱发德拜磁场的检测系统及检测方法 (Detection system and detection method for Debye magnetic field induced by underwater vehicle ) 是由 卢向东 王学锋 段宇鹏 刘院省 邓意成 于 2020-04-27 设计创作，主要内容包括：本发明涉及一种水下航行体诱发德拜磁场的检测方法及检测系统,该检测系统包括马达转速控制器、无磁水下航行体、无磁电动马达、无磁螺旋桨、无磁容器、磁屏蔽箱、移动式磁场接收器、固定式磁场接收器和数据处理器,无磁电动马达在马达转速控制器的控制下,带动无磁螺旋桨按照设定的转速转动,推动海水产生尾流,诱发德拜磁场；移动式磁场接收器和固定式磁场接收器分别接收德拜磁场的磁场信号和德拜磁场的背景噪声信号,并传输给数据处理器,由数据处理器解算德拜磁场信息,该系统利用水下航行体诱发的德拜磁场特性,实现对水下航行体的探测和识别,实现了德拜磁场信息的精确测量。(The invention relates to a detection method and a detection system for inducing a Debye magnetic field by an underwater vehicle, wherein the detection system comprises a motor rotating speed controller, a non-magnetic underwater vehicle, a non-magnetic electric motor, a non-magnetic propeller, a non-magnetic container, a magnetic shielding box, a movable magnetic field receiver, a fixed magnetic field receiver and a data processor, wherein the non-magnetic electric motor drives the non-magnetic propeller to rotate according to a set rotating speed under the control of the motor rotating speed controller, pushes seawater to generate wake flow and induces the Debye magnetic field; the movable magnetic field receiver and the fixed magnetic field receiver respectively receive a magnetic field signal of a Debye magnetic field and a background noise signal of the Debye magnetic field and transmit the magnetic field signal and the background noise signal to the data processor, the data processor calculates Debye magnetic field information, and the system realizes detection and identification of the underwater vehicle by utilizing the characteristic of the Debye magnetic field induced by the underwater vehicle and realizes accurate measurement of the Debye magnetic field information.)
1. A detection system for inducing Debye magnetic field by underwater vehicle is characterized in that: the device comprises a motor rotating speed controller, a nonmagnetic underwater navigation body, a nonmagnetic electric motor, a nonmagnetic propeller, a nonmagnetic container, a magnetic shielding box, a movable magnetic field receiver, a fixed magnetic field receiver and a data processor, wherein the nonmagnetic underwater navigation body, the nonmagnetic electric motor, the nonmagnetic propeller, the movable magnetic field receiver and the fixed magnetic field receiver are all arranged in the nonmagnetic container; the mobile magnetic field receiver and the fixed magnetic field receiver respectively receive a magnetic field signal of the Debye magnetic field and a background noise signal of the Debye magnetic field, and transmit the signals to the data processor, and the data processor calculates the Debye magnetic field information.
2. The underwater vehicle induced debye field detection system of claim 1, wherein: the mobile magnetic field receiver and the fixed magnetic field receiver are respectively used for acquiring a magnetic field signal of a Debye magnetic field and a background noise signal of the Debye magnetic field, and the magnetic field signal and the background noise signal are converted into electric signals by the magnetic field data acquisition equipment and are sent to the data processor.
3. The underwater vehicle induced debye field detection system of claim 1, wherein: the non-magnetic container is of an open structure; the magnetic shielding room is a closed space.
4. The underwater vehicle induced debye field detection system of claim 3, wherein: the section of the non-magnetic container along the depth direction is in an equilateral trapezoid shape; the internal remanence of the magnetic shield room is 10nT or less.
5. The underwater vehicle induced debye field detection system of claim 1, wherein: the mobile magnetic field receiver is arranged in the same horizontal plane with the nonmagnetic underwater vehicle.
6. The underwater vehicle induced debye field detection system of claim 1, wherein: the fixed magnetic field receiver is arranged at the edge which is not influenced by the Debye magnetic field generated by the seawater wake flow in the non-magnetic container; the fixed magnetic field receiver is arranged in a bottom angle position far away from the movable magnetic field receiver in the non-magnetic container.
7. The underwater vehicle induced debye field detection system of claim 1, wherein: the non-magnetic electric motor is arranged inside the non-magnetic underwater vehicle, and the non-magnetic propeller is arranged at the tail of the non-magnetic underwater vehicle.
8. The underwater vehicle induced debye field detection system of claim 1, 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; the material of the non-magnetic container is non-magnetic glass.
9. A detection method for inducing Debye magnetic field by underwater vehicle is characterized in that: the detection system of any one of claims 1 to 8, which is used for realizing the method, and comprises the following steps:
(1) the nonmagnetic underwater vehicle is placed in seawater solution in a nonmagnetic container, the nonmagnetic container is placed in a magnetic shielding box, a motor rotating speed controller controls the rotating speed of a nonmagnetic electric motor, the nonmagnetic electric motor drives a nonmagnetic propeller at the tail part of the nonmagnetic underwater vehicle to rotate, the nonmagnetic propeller is pushed to be adjacent to seawater to generate wake flow, and sodium ions and chloride ions in seawater are stirred to induce a Debye magnetic field;
(2) the mobile magnetic field receiver and the fixed magnetic field receiver are opened and arranged in the non-magnetic container, the mobile magnetic field receiver receives a magnetic field signal of a Debye magnetic field, the fixed magnetic field receiver receives a background noise signal of the Debye magnetic field and carries out signal acquisition through magnetic field data acquisition equipment, and the magnetic field data acquisition equipment converts an acquired optical signal into an electric signal and then sends the electric signal to a data processor;
(3) and the data processor calculates the Debye magnetic field according to the electric signal.
10. The method for detecting the debye magnetic field induced by the underwater vehicle as claimed in claim 9, wherein: the specific processes of signal receiving, collecting and resolving in the steps (2) and (3) are as follows:
(1) placing the mobile magnetic field receiver in the same horizontal plane with the nonmagnetic underwater vehicle, establishing a coordinate system OXYZ by taking the center of the nonmagnetic propeller as a coordinate dot O, taking the horizontal plane as an OXY plane, pointing the mobile magnetic field receiver by the nonmagnetic underwater vehicle as an OX axis, being vertical to a seawater plane and upward as an OZ axis, and conforming to the right-hand rule of the OY axis; the coordinate of the mobile magnetic field receiver is (x)0，0，0)；
(2) The mobile magnetic field receiver receives a magnetic field signal of a Debye magnetic field, the fixed magnetic field receiver receives a background noise signal of the Debye magnetic field and acquires the background noise signal by magnetic field data acquisition equipment, and the magnetic field data acquisition equipment converts an acquired optical signal into an electric signal and then transmits the electric signal to a data processor;
(3) the data processor calculates the corresponding magnetic field value B according to the magnetic field signal of the Debye magnetic field in the form of the received electric signal0(t) calculating the corresponding noise value B from the background noise signal of the Debye magnetic field in the form of the received electrical signal0' (t) to obtain (x)00, 0) value of Debye magnetic field induced by underwater vehicleD0(t)＝B0(t)-B0'(t)；
(4) In (x)00, 0), respectively moving the mobile magnetic field receiver along the +/-Y direction at equal intervals delta Y, and repeating the steps (2) and (3) to obtain a series of Debye magnetic field values induced by the underwater vehicle in the +/-Y direction;
(5) in (x)00, 0), respectively moving the mobile magnetic field receiver along the +/-Z direction at equal intervals delta Z, and repeating the steps (2) and (3) to obtain a series of Debye magnetic field values induced by the underwater vehicle in the +/-Z direction;
(6) and repeating the steps (2), (3), (4) and (5) after moving for a delta X distance at equal intervals in the +/-X direction to obtain the Debye magnetic field values in the Y direction and the Z direction at intervals of the delta X distance in the +/-X direction respectively.
11. The method for detecting the debye magnetic field induced by the underwater vehicle as claimed in claim 10, wherein: and (4) constructing a three-dimensional magnetic field data curve graph by using the Debye magnetic field values obtained in the step (6) to obtain a three-dimensional magnetic field value graph of the Debye magnetic field induced by the nonmagnetic underwater vehicle.
Technical Field
The invention relates to a detection method and a detection system for an induced Debye magnetic field of an underwater vehicle, belonging to the technical field of underwater non-acoustic detection.
Background
Debye (p. debye) in 1933 proposed a new method for determining electrolyte ion mass from the magnitude of the electric field generated by electrolyte solution movement. 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., chloride and sodium ions) or solutions moving relative to each other generate electric and magnetic fields of the same frequency as the acoustic source. By measuring the electric or magnetic field, the friction coefficient, and hence the ion mass, can be determined. 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 electrodynamic phenomenon. The debye effect has been the basis for many measurement techniques in chemistry.
The debye field is a physical field generated in the debye effect, and in 1980, research by vhvlyanski et al showed that the debye field can be generated by a solenoid component of fluid acceleration. In 1996, J.B.Peddell et al further theoretically addressed the inherent characteristics of the Debye magnetic field. The current pulsation occurs in the sea water due to the high-speed rotation of the propeller of the submarine or the 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 Debye magnetic field. Therefore, the underwater vehicle including the submarine generates a debye magnetic field at all times during the movement, and the magnetic field is different from the remanence of the underwater vehicle including the submarine, and the magnetic field cannot disappear by demagnetizing the material of the underwater vehicle, and is a concomitant magnetic field. Therefore, the method has an important application prospect in detecting the Debye magnetic field induced by the underwater vehicle.
Because the Debye magnetic field intensity is very weak, at present, on the Debye magnetic field detection method, a mature method can be used for reference at home and abroad. In order to deeply understand various characteristics of the Debye magnetic field, apply the Debye magnetic field to the detection field and meet engineering requirements, the construction of a set of detection method and detection system for inducing the Debye magnetic field by the underwater vehicle has important significance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a detection system for inducing a Debye magnetic field by an underwater vehicle, which utilizes the characteristics of the Debye magnetic field induced by the underwater vehicle to realize the detection and identification of the underwater vehicle and realize the accurate measurement of the information of the Debye magnetic field.
Another object of the present invention is to provide a method for detecting debye magnetic field induced by an underwater vehicle.
The above purpose of the invention is mainly realized by the following technical scheme:
a detection system for inducing Debye magnetic field by an underwater vehicle comprises a motor rotating speed controller, a nonmagnetic underwater vehicle, a nonmagnetic electric motor, a nonmagnetic propeller, a nonmagnetic container, a magnetic shielding box, a movable magnetic field receiver, a fixed magnetic field receiver and a data processor, wherein the nonmagnetic underwater vehicle, the nonmagnetic electric motor, the nonmagnetic propeller, the movable magnetic field receiver and the fixed magnetic field receiver are all arranged in the nonmagnetic container; the mobile magnetic field receiver and the fixed magnetic field receiver respectively receive a magnetic field signal of the Debye magnetic field and a background noise signal of the Debye magnetic field, and transmit the signals to the data processor, and the data processor calculates the Debye magnetic field information.
In the detection system for inducing the debye magnetic field by the underwater vehicle, the detection system further comprises a magnetic field data acquisition device, wherein the magnetic field data acquisition device converts a magnetic field signal of the debye magnetic field and a background noise signal of the debye magnetic field, which are respectively acquired from the movable magnetic field receiver and the fixed magnetic field receiver, into an electric signal by an optical signal, and sends the electric signal to the data processor.
In the detection system for inducing the Debye magnetic field by the underwater vehicle, the non-magnetic container is of an open structure; the magnetic shielding room is a closed space.
In the detection system for inducing the Debye magnetic field by the underwater vehicle, the section of the nonmagnetic container along the depth direction is an equilateral trapezoid; the internal remanence of the magnetic shield room is 10nT or less.
In the detection system for inducing the Debye magnetic field by the underwater vehicle, the mobile magnetic field receiver is arranged in the same horizontal plane with the nonmagnetic underwater vehicle.
In the above detection system for an underwater vehicle-induced debye magnetic field, the fixed magnetic field receiver is arranged at an edge of the nonmagnetic container, which is not affected by the debye magnetic field generated by the seawater wake; the fixed magnetic field receiver is arranged in a bottom angle position far away from the movable magnetic field receiver in the non-magnetic container.
In the detection system for inducing the Debye magnetic field by the underwater vehicle, the nonmagnetic electric motor is arranged in the nonmagnetic underwater vehicle, and the nonmagnetic propeller is arranged at the tail part of the nonmagnetic underwater vehicle.
In the detection system for inducing Debye magnetic field by underwater vehicle, the magnetic shielding room is made of permalloy material, and the number of layers of the permalloy material is equal to or more than 4; the material of the non-magnetic container is non-magnetic glass.
A detection method for inducing a Debye magnetic field by an underwater vehicle is realized by adopting the detection system, and specifically comprises the following steps:
(1) the nonmagnetic underwater vehicle is placed in seawater solution in a nonmagnetic container, the nonmagnetic container is placed in a magnetic shielding box, a motor rotating speed controller controls the rotating speed of a nonmagnetic electric motor, the nonmagnetic electric motor drives a nonmagnetic propeller at the tail part of the nonmagnetic underwater vehicle to rotate, the nonmagnetic propeller is pushed to be adjacent to seawater to generate wake flow, and sodium ions and chloride ions in seawater are stirred to induce a Debye magnetic field;
(2) the mobile magnetic field receiver and the fixed magnetic field receiver are opened and arranged in the non-magnetic container, the mobile magnetic field receiver receives a magnetic field signal of a Debye magnetic field, the fixed magnetic field receiver receives a background noise signal of the Debye magnetic field and carries out signal acquisition through magnetic field data acquisition equipment, and the magnetic field data acquisition equipment converts an acquired optical signal into an electric signal and then sends the electric signal to a data processor;
(3) and the data processor calculates the Debye magnetic field according to the electric signal.
In the method for detecting the debye magnetic field induced by the underwater vehicle, the specific processes of signal receiving, signal acquiring and signal resolving in the steps (2) and (3) are as follows:
(1) placing the mobile magnetic field receiver in the same horizontal plane with the nonmagnetic underwater vehicle, establishing a coordinate system OXYZ by taking the center of the nonmagnetic propeller as a coordinate dot O, taking the horizontal plane as an OXY plane, pointing the mobile magnetic field receiver by the nonmagnetic underwater vehicle as an OX axis, being vertical to a seawater plane and upward as an OZ axis, and conforming to the right-hand rule of the OY axis; the coordinate of the mobile magnetic field receiver is (x)0，0，0)；
(2) The mobile magnetic field receiver receives a magnetic field signal of a Debye magnetic field, the fixed magnetic field receiver receives a background noise signal of the Debye magnetic field and acquires the background noise signal by magnetic field data acquisition equipment, and the magnetic field data acquisition equipment converts an acquired optical signal into an electric signal and then transmits the electric signal to a data processor;
(3) the data processor calculates the corresponding magnetic field value B according to the magnetic field signal of the Debye magnetic field in the form of the received electric signal0(t) calculating the corresponding noise value B from the background noise signal of the Debye magnetic field in the form of the received electrical signal0' (t) to obtain (x)00, 0) value of Debye magnetic field induced by underwater vehicleD0(t)＝B0(t)-B0'(t)；
(4) In (x)00, 0), respectively moving the mobile magnetic field receiver along the +/-Y direction at equal intervals delta Y, and repeating the steps (2) and (3) to obtain a series of Debye magnetic field values induced by the underwater vehicle in the +/-Y direction;
(5) in (x)00, 0) position, moving the mobile magnetic field receiver along the + -Z direction at equal intervals Δ Z, respectively, and repeating the steps (2) and (3) to obtain the + -Z directionThe series of underwater vehicles induces a Debye magnetic field value;
(6) and repeating the steps (2), (3), (4) and (5) after moving for a delta X distance at equal intervals in the +/-X direction to obtain the Debye magnetic field values in the Y direction and the Z direction at intervals of the delta X distance in the +/-X direction respectively.
In the method for detecting the Debye magnetic field induced by the underwater vehicle, a three-dimensional magnetic field data curve graph is constructed by the Debye magnetic field value obtained in the step (6), and a three-dimensional magnetic field value graph of the Debye magnetic field induced by the nonmagnetic underwater vehicle is obtained.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention provides a detection system for inducing a Debye magnetic field by an underwater vehicle, which comprises a motor rotating speed controller, a nonmagnetic underwater vehicle, a nonmagnetic electric motor, a nonmagnetic propeller, a nonmagnetic container, a magnetic shielding box, a movable magnetic field receiver, a fixed magnetic field receiver and a data processor, wherein the nonmagnetic electric motor drives the nonmagnetic propeller to rotate according to a set rotating speed under the control of the motor rotating speed controller, pushes seawater to generate a wake flow and induces the Debye magnetic field; the movable magnetic field receiver and the fixed magnetic field receiver respectively receive a magnetic field signal of a Debye magnetic field and a background noise signal of the Debye magnetic field and transmit the magnetic field signal and the background noise signal to the data processor, the data processor calculates Debye magnetic field information, and the system realizes detection and identification of the underwater vehicle by utilizing the characteristic of the Debye magnetic field induced by the underwater vehicle and realizes accurate measurement of the Debye magnetic field information.
(2) The method for detecting the Debye magnetic field induced by the underwater vehicle is realized by a detection system, can obtain all-around Debye magnetic field values, has more comprehensive data information, and realizes accurate measurement of the Debye magnetic field information.
(3) The mobile magnetic field receiver and the fixed magnetic field receiver are adopted to respectively receive the magnetic field signal of the Debye magnetic field and the background noise signal of the Debye magnetic field, and background noise is deducted to obtain more accurate Debye magnetic field signals, so that the measurement precision is obviously improved;
(4) 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;
(5) in a preferred embodiment of the invention, the permalloy magnetic shielding box is composed of at least four layers of permalloy materials, and the interference of an external magnetic field to a magnetic field in the box is isolated to the maximum extent. After the permalloy magnetic shielding box is demagnetized, the remanence of the interior zero magnetic environment is less than 10 nT; in addition, in an optional embodiment of the invention, the underwater vehicle is made of non-magnetic titanium metal materials, and the built-in electric motor and the propeller at the tail of the underwater vehicle are made of non-magnetic materials, so that the magnetic interference is obviously reduced.
Drawings
FIG. 1 is a schematic diagram of a system for detecting Debye magnetic field induced by an underwater vehicle according to the present invention;
fig. 2 is a schematic structural diagram of a mobile magnetic field receiver and a fixed magnetic field receiver according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
fig. 1 is a schematic structural diagram of a system for detecting a debye magnetic field induced by an underwater vehicle according to the present invention, and the system for detecting a debye magnetic field induced by an underwater vehicle according to the present invention includes a motor rotation speed controller 1, a nonmagnetic
The nonmagnetic
The non-magnetic
The nonmagnetic
For example, the whole detection process is as follows:
under the zero magnetic environment of the permalloy magnetic shielding box, the nonmagnetic underwater navigation body model is placed in seawater solution at a certain depth in the nonmagnetic water tank box, a nonmagnetic propeller at the tail part of the nonmagnetic underwater navigation body is driven by a built-in nonmagnetic electric motor of the nonmagnetic underwater navigation body, and the rotating speed of the built-in nonmagnetic electric motor is controlled by a motor rotating speed controller outside the nonmagnetic water tank box. When a certain stable constant current is applied to the motor rotating speed controller, the built-in nonmagnetic electric motor embedded in the nonmagnetic underwater navigation body drives the nonmagnetic propeller at the tail part of the nonmagnetic underwater navigation body to rotate, and drives seawater solution together to form the wake flow of the nonmagnetic underwater navigation body with certain characteristics. The wake and the nonmagnetic underwater vehicle agitate sodium and chloride ions in the seawater solution in the nonmagnetic watertank to cause a Debye magnetic field to form in the seawater solution in the nonmagnetic watertank. The Debye magnetic field signal is finally received by the mobile magnetic field receiver and the fixed magnetic field receiver, the magnetic field signal is acquired and stored by the magnetic field data acquisition equipment, and finally, the corresponding Debye magnetic field value is identified by the data processor.
In order to reduce residual magnetic interference introduced by the detection device to the maximum extent, the underwater vehicle is made of nonmagnetic titanium metal materials, and the built-in electric motor and the propeller at the tail part of the underwater vehicle are made of nonmagnetic materials. The non-magnetic underwater vehicle, the built-in non-magnetic electric motor, the non-magnetic propeller, the non-magnetic water tank, the movable magnetic field receiver and the fixed magnetic field receiver are all arranged in a zero magnetic environment formed by five permalloy magnetic shielding boxes.
The nonmagnetic underwater navigation body is arranged in the seawater solution in the nonmagnetic water tank box, when a certain constant current is applied to the motor rotating speed controller, the current is transmitted to the built-in nonmagnetic electric motor in the nonmagnetic underwater navigation body through the twisted pair, the propeller obtains corresponding rotating speed to rotate in the seawater solution through the rotating shaft and pushes the adjacent seawater solution, and sodium ions and chloride ions in the seawater solution in the stirred area induce a Debye magnetic field with certain characteristic attributes. The ultrahigh-sensitivity scalar magnetometer with the measurement range of 50000 nT-0 nT and the resolution ratio superior to 0.001nT can be used as a movable magnetic field receiver and a fixed magnetic field receiver. The magnetic field information obtained by the two magnetic field receivers is collected by the magnetic field data acquisition equipment and processed by the data processor to obtain the corresponding magnetic field value.
The invention relates to a method for detecting a Debye magnetic field induced by an underwater vehicle by using the detection system, which comprises the following steps:
firstly, placing a nonmagnetic underwater vehicle in seawater solution in a nonmagnetic container, placing the nonmagnetic container in a magnetic shielding box, controlling the rotating speed of a nonmagnetic electric motor by a motor rotating speed controller, driving a nonmagnetic propeller at the tail part of the nonmagnetic underwater vehicle to rotate by the nonmagnetic electric motor, pushing adjacent seawater to generate a wake flow, and stirring sodium ions and chloride ions in seawater to induce a Debye magnetic field;
secondly, opening a movable magnetic field receiver and a fixed magnetic field receiver which are arranged in the non-magnetic container, wherein the movable magnetic field receiver receives a magnetic field signal of the Debye magnetic field, the fixed magnetic field receiver receives a background noise signal of the Debye magnetic field and carries out signal acquisition through a magnetic field data acquisition device, and the magnetic field data acquisition device converts an acquired optical signal into an electric signal and then sends the electric signal to a data processor;
and thirdly, the data processor calculates the Debye magnetic field according to the electric signal.
The specific processes of signal receiving, collecting and resolving in the steps (two) and (three) are as follows:
(1) placing the mobile magnetic field receiver in the same horizontal plane with the nonmagnetic underwater vehicle, establishing a coordinate system OXYZ by taking the center of the nonmagnetic propeller as a coordinate dot O, taking the horizontal plane as an OXY plane, pointing the mobile magnetic field receiver by the nonmagnetic underwater vehicle as an OX axis, being vertical to a seawater plane and upward as an OZ axis, and conforming to the right-hand rule of the OY axis; the coordinate of the mobile magnetic field receiver is (x)0，0，0)；
(2) The mobile magnetic field receiver receives a magnetic field signal of a Debye magnetic field, the fixed magnetic field receiver receives a background noise signal of the Debye magnetic field and acquires the background noise signal by magnetic field data acquisition equipment, and the magnetic field data acquisition equipment converts an acquired optical signal into an electric signal and then transmits the electric signal to a data processor;
(3) the data processor calculates the corresponding magnetic field value B according to the magnetic field signal of the Debye magnetic field in the form of the received electric signal0(t) calculating the corresponding noise value B from the background noise signal of the Debye magnetic field in the form of the received electrical signal0' (t) from which (x) can be obtained00, 0) value of Debye magnetic field induced by underwater vehicleD0(t)＝B0(t)-B0'(t)；
(4) In (x)00, 0), respectively moving the mobile magnetic field receiver along the +/-Y direction at equal intervals delta Y, and repeating the steps (2) and (3) to obtain a series of Debye magnetic field values induced by the underwater vehicle in the +/-Y direction;
(5) in the field of(x00, 0), respectively moving the mobile magnetic field receiver along the +/-Z direction at equal intervals delta Z, and repeating the steps (2) and (3) to obtain a series of Debye magnetic field values induced by the underwater vehicle in the +/-Z direction;
(6) and repeating the steps (2), (3), (4) and (5) after moving for a delta X distance at equal intervals in the +/-X direction to obtain the Debye magnetic field values in the Y direction and the Z direction at intervals of the delta X distance in the +/-X direction respectively.
(7) And (4) constructing a three-dimensional magnetic field data curve graph according to the Debye magnetic field values obtained in the step (6) to obtain a three-dimensional magnetic field value graph of the Debye magnetic field induced by the underwater vehicle at a certain rotating speed under a certain underwater vehicle model.
- 上一篇：一种医用注射器针头装配设备
- 下一篇：应用于水下航行体尾流诱发德拜磁场的发生接收系统