海军工程大学学报
海軍工程大學學報
해군공정대학학보
JOURNAL OF NAVAL UNIVERSITY OF ENGINEERING
2014年
1期
5-8,75
,共5页
船舶%静电场%轴频电场%电极%仪表放大器%频谱
船舶%靜電場%軸頻電場%電極%儀錶放大器%頻譜
선박%정전장%축빈전장%전겁%의표방대기%빈보
ship%static electrical signature%shaft-related ELFE%electrode%instrument amplifier%spectrum
为了对船舶极低频电场信号的特性进行深入研究,利用所研制的低噪声测量系统对某海域的船舶电场信号进行了测量。在测量结果的基础上对其信号特征进行了分析,分析结果表明:中型船舶的极低频电场信号在近场可达上百微伏每米的量级,且轴频电场信号为谐波信号,在频域上表现为线谱信号,其基频为螺旋桨转动频率,因此该信号可被应用于远程探测。海上试验结果表明:所研制的测量系统利用轴频电场可以探测到2 km外的目标信号。
為瞭對船舶極低頻電場信號的特性進行深入研究,利用所研製的低譟聲測量繫統對某海域的船舶電場信號進行瞭測量。在測量結果的基礎上對其信號特徵進行瞭分析,分析結果錶明:中型船舶的極低頻電場信號在近場可達上百微伏每米的量級,且軸頻電場信號為諧波信號,在頻域上錶現為線譜信號,其基頻為螺鏇槳轉動頻率,因此該信號可被應用于遠程探測。海上試驗結果錶明:所研製的測量繫統利用軸頻電場可以探測到2 km外的目標信號。
위료대선박겁저빈전장신호적특성진행심입연구,이용소연제적저조성측량계통대모해역적선박전장신호진행료측량。재측량결과적기출상대기신호특정진행료분석,분석결과표명:중형선박적겁저빈전장신호재근장가체상백미복매미적량급,차축빈전장신호위해파신호,재빈역상표현위선보신호,기기빈위라선장전동빈솔,인차해신호가피응용우원정탐측。해상시험결과표명:소연제적측량계통이용축빈전장가이탐측도2 km외적목표신호。
All vessels ,w hole hulls are built of steel or other materials ,are the sources of an electric field in the seawater .In order to study the characteristics of a ship′s extremely low frequency electri-cal field ,the low noise measuring system is used to measure the signals generated by the electrical field of the ship in a certain sea area .On this basis ,the signal characteristics are analyzed .The results show that the extremely low frequency electrical field signal is an important characteristic ,that the shaft-related ELFE field is a harmonic and that its frequency is in accord with the propeller rotating frequency .The signal can be used for remote detection .The maritime tests verify that the developed measuring system can detect the target signal two kilometers away by use of the shaft-related ELFE .