Method for measuring ship induced magnetic field based on magnetic field mapping between surface subdivision units and measuring points
A technology of inductive magnetic field and measurement method, applied in the direction of magnetic performance measurement, measurement device, measurement of magnetic variables, etc., can solve the problems of poor uniformity, the inability of the magnetic field to achieve uniformity, and the inability to guarantee the accuracy of the induced magnetic field, saving construction costs, Improve accuracy and efficiency, save manpower and material resources
Active Publication Date: 2017-08-25
NAVAL UNIV OF ENG PLA
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Due to the limitations of various factors, the magnetic field generated by the compensation coil of the degaussing station cannot achieve ideal uniformity, and the larger the ship, the worse the uniformity, so the accuracy of the measured induced magnetic field cannot be guaranteed, which greatly limits the geomagnetic simulation method. promotional use of
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[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention belong to the protection scope of the present invention.
[0025] A method for measuring a ship's induced magnetic field based on a surface subdivision unit and a magnetic field mapping relationship between measuring points described in an embodiment of the present invention includes the following steps:
[0026] Step 1): If figure 1 As shown, select a closed surface that can enclose the ship. Without loss of generality, a cuboid surface slightly larger than the scale of the ship is selected here, and the ship is located inside the cuboid surface, and its cente...
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The invention discloses a method for measuring a ship induced magnetic field based on a magnetic field mapping relation between surface subdivision units and measuring points. The method comprises the steps of selecting a closed surface capable of enclosing a ship inside, subdividing the closed surface into a plurality of surface units, and supposing the center of each surface unit to be a computing point; supposing current of each coil, and combining electromagnetic fields generated by the computing points into a matrix Be; acquiring a magnetic field of each sensor measuring point before the chip gets into a degaussing station, wherein the acquired magnetic field is recorded as Bbj; sequentially electrifying according to the set current of each coil, acquiring the magnetic field of each sensor measuring point again, subtracting the magnetic field Bbj so as to acquire a result Bc0; acquiring the magnetic field of each sensor measuring point after the ship gets into the degaussing station, subtracting the magnetic field Bbj so as to acquire a result Bship; sequentially electrifying according to the current of each coil, acquiring the magnetic field of each sensor measuring point again, subtracting the magnetic field Bbj and Bship to acquire a result Bc1; subtracting the corresponding Bc0 from the result Bc1 to acquire Bc; and acquiring CoeK according to an equation CoeK*Be=Bc, and thus solving a corresponding induced magnetic field of the ship. The beneficial effects are that the measurement accuracy and efficiency of the ship induced magnetic field are improved, and a lot of manpower and material resources are saved.
Description
technical field [0001] The invention relates to the technical field of ship degaussing, in particular to a method for measuring a ship's induced magnetic field. Background technique [0002] The ship's magnetic field usually refers to the magnetic field generated by the ship in its surrounding space. It is the main physical field used by various magnetic detection equipment and underwater weapons for detection and attack. In order to resist the attack of magnetic weapons in the water and magnetic detection in the air, it is necessary to implement magnetic protection measures for ships, and accurately grasping the magnetic field induced by ships is an important prerequisite for implementing magnetic protection measures. The ship induced magnetic field can be obtained by two methods: numerical calculation method and magnetic field measurement method. Common numerical calculation methods used to calculate the induced magnetic field of ships include finite element method, integ...
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CPCG01R33/1253
Inventor 刘胜道周国华陈瀚斯赵文春高俊吉李志新郭成豹刘月林吴轲娜张明田东张树朱武兵周炜昶
Owner NAVAL UNIV OF ENG PLA