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Transactions: WSEAS TRANSACTIONS ON CIRCUITS AND SYSTEMS
Transactions ID Number: 32-906
Full Name: Xiao ming Ren
Position: Ph.D. Candidate
Age: ON
Sex: Male
Address: No. 1954 Huashan Road, Shanghai
Country: CHINA
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E-mail address: rxm_213@163.com
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Title of the Paper: Development and Calibration of an Impulse Magnetic Field Measurement System for Lightning Electromagnetic Pulse Investigation
Authors as they appear in the Paper: xiao-ming ren, zheng-cai fu, wei sun
Email addresses of all the authors: rxm_213@163.com, zcfu@sjtu.edu.cn, sw33@sjtu.edu.cn
Number of paper pages: 10
Abstract: In order to evaluate the impulse magnetic field distribution inside buildings truck by lightning or by nearby stokes, a set of measuring system composed of self-made magnetic detection coil and fiber transmission system was developed. The sensitivity coefficient of the optical fiber transmission system was calibrated by sine wave generator. Connecting the output of a portable 8/20¦Ìs current generator with a circular coil whose diameter is 0.3 m to compose the magnetic field generator, the detection coil was fixed in the center of the circular coil for calibration. The B/V calibrated coefficient error of the system is less than 3%. The measuring system was used in the investigation of the shielding effectiveness of building metal frames under nearby lightning strokes. The test results of the shielding effectiveness on the grid metal frame model shows that the effectiveness coefficient will increase with the decrease of grid width. While the width of the grid cha!
nges from 0.5m to 0.25m, there is a change of approximately 10.2%. While the width of grid changes from 0.25 m to 0.125 m, is increased about 5%. When the 0.5 mm steel plate was used, the value of is 4.9. The test results show that the developed system can fulfill the requirements of the impulse magnetic field measurement.
Keywords: Impulse magnetic field, Calibration, Magnetic field generator, Magnetic field measurement, Lightning protection, fiber transmission system
EXTENSION of the file: .doc
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