CN110377103B - Closed-loop demagnetization method based on stress monitoring system - Google Patents
Closed-loop demagnetization method based on stress monitoring system Download PDFInfo
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- CN110377103B CN110377103B CN201910795476.1A CN201910795476A CN110377103B CN 110377103 B CN110377103 B CN 110377103B CN 201910795476 A CN201910795476 A CN 201910795476A CN 110377103 B CN110377103 B CN 110377103B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F7/00—Regulating magnetic variables
Abstract
A closed-loop degaussing method based on a stress monitoring system comprises the steps of firstly determining the positions of sensors used for measuring the stress of a ship body in the stress monitoring system, and then obtaining the relation between the stress change of the ship body at the installation positions and a fixed magnetic field and an induction magnetic field based on a simulation calculation method and/or an experiment method; then, continuously obtaining the relations between the fixed magnetic field and the induced magnetic field at the positions and the total magnetic field of the ship body and the magnetic characteristics at the position with the designated distance outside the ship body through simulation calculation and/or experiments; and finally, networking the closed-loop demagnetization system and the stress monitoring system to obtain the real-time magnetic characteristics of the ship body. The invention can obtain high-precision magnetic characteristics and improve the closed-loop demagnetization control effect by fully utilizing the measurement resources of the stress monitoring system without or in cooperation with a small amount of magnetic sensors.
Description
Technical Field
The invention relates to the technical field of ship underwater feature protection, in particular to a closed-loop demagnetization method based on a stress monitoring system.
Background
Reducing the sensitivity of vessels to detection by mines, submarines and other detection systems by altering their magnetic characteristics is called magnetic stealth. In deep waters, the magnetic signature of the vessel can be reduced to a level that is undetectable by submarine mines, thereby avoiding the necessity to hunt or sweep out these mines during the initial critical time and resource demanding phase of the conflict. In shallow water areas, the reduction of magnetic characteristics can improve the mine sweeping efficiency, reduce the effective density of a mine field, reduce the time and platform resources required for cleaning the mine field, and reduce the mine strike risk of subsequent naval vessel navigation.
Currently, the region of interest to navy has shifted from deep sea to coastal. The acoustic challenges of shallow water marine environments make it increasingly important to detect submarines through electromagnetic field signatures. In addition, small low-power magnetic field sensors are now already deployed in underwater magnetic barriers and manned or unmanned aircraft. A population of Unmanned Aerial Vehicles (UAVs) equipped with Magnetic Anomaly Detection (MAD) sensors controlled in a coordinated behavioral search mode can monitor large shallow water areas in the ocean and detect quiet submarines. Therefore, the magnetic characteristics of the naval vessel are reduced, and the method has important significance.
Under the action of external mechanical stress and high temperature, the magnetic domains can be rearranged, so that the magnetization of the naval vessel is changed; research shows that the fixed magnetic field and the induced magnetic field of the submarine increase with the increase of pressure, and a closed-loop demagnetizing system needs to quantize the magnetic characteristics and further set a demagnetizing current for demagnetizing.
In the prior art, the measurement of the magnetic field is realized through a magnetic sensor, and the magnetic sensor is expensive and is easily influenced by other surrounding magnetic sources, so that the measurement result is inaccurate.
Disclosure of Invention
The applicant provides a closed-loop demagnetization method based on a stress monitoring system aiming at the defects in the prior art, so as to effectively solve the problems of inaccurate measurement result and high cost of the measurement method in the prior art.
The technical scheme adopted by the invention is as follows:
a closed-loop demagnetization method based on a stress monitoring system comprises the following operation steps:
step 1: determining the installation position of a sensor for measuring the stress of a ship body in a stress monitoring system;
step 2: obtaining the relation between the stress change of the ship body at the installation position and the fixed magnetic field and the induced magnetic field by a simulation calculation and/or experiment method;
and step 3: further obtaining magnetic characteristics of other positions of the ship body and a specified distance outside the ship body by a simulation calculation and/or experiment method;
and 4, step 4: the relation between the stress at the mounting position of the stress sensor and the magnetic characteristics of the ship body and the position outside the ship body at a specified distance is obtained through arrangement;
and 5: applying the result obtained in the step 4 to a controller of a closed-loop demagnetization system;
step 6: connecting a controller with a closed-loop demagnetization system, and networking the closed-loop demagnetization system with a stress monitoring system according to the current stress value and the relation between the current stress value and the ship body and the magnetic characteristics at the specified distance outside the ship body, so that the closed-loop demagnetization system can obtain real-time ship body stress information;
and 7: the controller calculates the appropriate degaussing current.
The further technical scheme is as follows:
in step 2, the relationship between the stress change of the ship body at the installation position and the fixed magnetic field and the induction magnetic field is a fitting formula or a table corresponding to each parameter in a scaling model.
In step 4, the relationship between the stress at the mounting position of the stress sensor and the magnetic characteristics of the ship body and the position outside the ship body at the designated distance is a table corresponding to each parameter in a fitting formula or a scaling model.
And the closed-loop demagnetization system is connected with the stress monitoring system through a network, and the stress information of the stress monitoring system is transmitted to the closed-loop demagnetization system in real time.
The invention has the following beneficial effects:
the method is convenient to operate, firstly, the position of a sensor for measuring the stress of the ship body in the stress monitoring system is determined, and then the relation between the stress change of the ship body at the installation position and the fixed magnetic field and the induced magnetic field is obtained based on a simulation calculation method (such as various finite element calculation software and the like) and/or an experiment method, wherein the relation can be a formula or a table; and then continuously obtaining the relation between the fixed magnetic field and the induced magnetic field at the positions and the total magnetic field of the ship body and the magnetic characteristics at the designated distance outside the ship body through simulation calculation and/or experiments. Finally, the real-time magnetic characteristics of the ship body can be obtained by networking the closed-loop demagnetization system and the stress monitoring system, so that a controller of the closed-loop demagnetization system can calculate and obtain correct demagnetization current, and the total magnetic characteristics of the ship body are kept at a lower level. The method of the invention does not need or is matched with a small amount of magnetic sensors, can reduce the complexity of the closed-loop demagnetization system and enhance the engineering practicability; the measurement resources of the stress monitoring system are fully utilized, each key part of the ship (boat) body is covered, the data is real, reliable and complete, and the reliability and the accuracy are higher than those of a method using a magnetic sensor independently; and the calculation workload of the controller in the closed-loop demagnetization system can be reduced, and the processing speed of the system is improved.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the closed-loop demagnetization method based on the stress monitoring system of this embodiment includes the following operation steps:
step 1: determining the installation position of a sensor for measuring the stress of a ship body in a stress monitoring system;
step 2: obtaining the relation between the stress change of the ship body at the installation position and the fixed magnetic field and the induction magnetic field by a simulation calculation and/or experiment method; the relation between the stress change of the ship body at the installation position and the fixed magnetic field and the induced magnetic field is a table corresponding to each parameter in a fitting formula or a scaling model.
And step 3: further obtaining magnetic characteristics of other positions of the ship body and a specified distance outside the ship body by a simulation calculation and/or experiment method;
and 4, step 4: the relation between the stress at the mounting position of the stress sensor and the magnetic characteristics of the ship body and the position outside the ship body at a specified distance is obtained through arrangement; the relation between the stress at the mounting position of the stress sensor and the magnetic characteristics of the ship body and the position at the specified distance outside the ship body is a table corresponding to each parameter in a fitting formula or a scaling model.
And 5: applying the result obtained in the step 4 to a controller of a closed-loop demagnetization system;
step 6: connecting a controller with a closed-loop demagnetization system, and networking the closed-loop demagnetization system with a stress monitoring system according to the current stress value and the relation between the current stress value and the ship body and the magnetic characteristics at the specified distance outside the ship body, so that the closed-loop demagnetization system can obtain real-time ship body stress information;
and 7: the controller calculates the appropriate degaussing current.
And the closed-loop demagnetization system is connected with the stress monitoring system through a network, and the stress information of the stress monitoring system is transmitted to the closed-loop demagnetization system in real time.
The specific implementation process is as follows:
referring to fig. 1, the method specifically includes the following steps:
step 1: determining the installation position of a stress sensor of a stress monitoring system;
step 2: the relationship between the stress change of the ship body at the installation positions and the fixed magnetic field and the induced magnetic field is obtained through simulation calculation or (and) experiments, and the relationship can be a formula or a table corresponding to each parameter in a scaling model;
and step 3: further performing simulation calculation or (and) experiment to obtain the magnetic characteristics of other positions of the ship body and the specified distance outside the ship body;
and 4, step 4: the relationship between the stress at the mounting position of the stress sensor and the magnetic characteristics of the ship body and the magnetic characteristics at the designated distance outside the ship body is obtained through sorting, and the relationship can be a table corresponding to each parameter in a formula or a scaling model;
and 5: applying this relationship to a controller of a closed-loop degaussing system;
step 6: networking the closed-loop demagnetization system and a stress monitoring system so that the closed-loop demagnetization system can obtain real-time ship (boat) body stress information;
and 7: the controller calculates the appropriate degaussing current.
The invention fully utilizes the measurement resources of the stress monitoring system, does not need or is matched with a small amount of magnetic sensors, and has higher reliability and accuracy than a method of singly using the magnetic sensors; meanwhile, the calculation workload of the controller in the closed-loop demagnetization system can be reduced, and the processing speed of the system is improved.
The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.
Claims (4)
1. A closed-loop demagnetization method based on a stress monitoring system is characterized in that: the method comprises the following operation steps:
step 1: determining the installation position of a sensor for measuring the stress of a ship body in a stress monitoring system;
step 2: obtaining the relation between the stress change of the ship body at the installation position and the fixed magnetic field and the induced magnetic field by a simulation calculation and/or experiment method;
and step 3: further obtaining magnetic characteristics of other positions of the ship body and a specified distance outside the ship body by a simulation calculation and/or experiment method;
and 4, step 4: the relation between the stress at the mounting position of the stress sensor and the magnetic characteristics of the ship body and the position outside the ship body at a specified distance is obtained through arrangement;
and 5: applying the result obtained in the step 4 to a controller of a closed-loop demagnetization system;
step 6: connecting a controller with a closed-loop demagnetization system, and networking the closed-loop demagnetization system with a stress monitoring system according to the current stress value and the relation between the current stress value and the ship body and the magnetic characteristics at the specified distance outside the ship body, so that the closed-loop demagnetization system can obtain real-time ship body stress information;
and 7: the controller calculates the appropriate degaussing current.
2. The closed-loop demagnetization method based on the stress monitoring system as claimed in claim 1, characterized in that: in step 2, the relationship between the stress change of the ship body at the installation position and the fixed magnetic field and the induction magnetic field is a fitting formula or a table corresponding to each parameter in a scaling model.
3. The closed-loop demagnetization method based on the stress monitoring system as claimed in claim 1, characterized in that: in step 4, the relationship between the stress at the mounting position of the stress sensor and the magnetic characteristics of the ship body and the position outside the ship body at the designated distance is a table corresponding to each parameter in a fitting formula or a scaling model.
4. The closed-loop demagnetization method based on the stress monitoring system as claimed in claim 1, characterized in that: and the closed-loop demagnetization system is connected with the stress monitoring system through a network, and the stress information of the stress monitoring system is transmitted to the closed-loop demagnetization system in real time.
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