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公开(公告)号：KR101323592B1
公开(公告)日：2013-10-30
申请号：KR1020130088729
申请日：2013-07-26
Applicant: 국방과학연구소
Abstract: PURPOSE: A demon process performance improvement method is provided to indicate a necessary performance with a small calculation amount. CONSTITUTION: A band pass filter block generates a divided band signal by inputting a propeller noise signal (S400, S410). A square calculation block executes square calculation for the generated divided band signal (S420). A low pass filter block removes a high frequency signal from the divided band signal and a direct current (DC) signal from the divided band signal in which the high frequency signal is removed (S430). A fast Fourier transform (FFT) block executes FFT for the divided band signal in which the DC signal is removed (S440). A noise regulation block generates a spectrum by regulating noise in order to remove background noise in the divided band signal (S450). An averaging unit generates an average spectrum by averaging the generated spectrum (S460). [Reference numerals] (AA) Start; (BB) End; (S400) Input a noise signal; (S410) Generate a split band signal using multiple band pass filters; (S420) Perform a square process in a selected split frequency band; (S430) Removal a high frequency signal and a DC signal; (S440) Convert a time area signal into a frequency area; (S450) Generate a spectrum by regulating noise in order to remove background noise; (S460) Generate an average spectrum by averaging the generated spectrum
Abstract translation: 目的：提供恶化过程性能改进方法，以小计算量表示必要的性能。 构成：带通滤波器块通过输入螺旋桨噪声信号（S400，S410）产生分频带信号。 平方计算块对所生成的分割频带信号执行平方运算（S420）。 低通滤波器块从分频带信号中去除高频信号，并从去除高频信号的分频带信号中去除直流（DC）信号（S430）。 快速傅立叶变换（FFT）块对去除了直流信号的分割频带信号执行FFT（S440）。 噪声调节块通过调节噪声产生频谱，以消除分频频带信号中的背景噪声（S450）。 平均单元通过对生成的频谱进行平均来生成平均频谱（S460）。 （附图标记）（AA）开始; （BB）结束; （S400）输入噪声信号; （S410）使用多个带通滤波器产生分频信号; （S420）在选择的分割频带中进行平方处理; （S430）去除高频信号和直流信号; （S440）将时区信号转换为频域; （S450）为了消除背景噪声，通过调节噪声产生频谱; （S460）通过对产生的频谱进行平均生成平均频谱
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公开(公告)号：KR101203044B1
公开(公告)日：2012-11-20
申请号：KR1020100126731
申请日：2010-12-13
Applicant: 국방과학연구소
Abstract: 소나(SONAR) 운용시 클러터가 포함된 표적 탐지자료에서 허프변환과 표적기동 특성을 이용하여 클러터를 효과적으로 제거하는 방법으로서, 소나의 탐지주기내 대상표적의 최대 이동거리를 고려한 국부영역을 설정하고 국부영역 내에 존재하는 3주기 탐자자료(위치)에 대한 허프변환식의 해를 구하여 표적과 클러터를 분류하는 방법을 소나 및 레이더 시스템에 적용 시, 여러 가지 원인에 의해 생성되는 클러터의 효과적인 제거로 표적 탐지능력을 향상시킬 수 있다.
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公开(公告)号：KR101303192B1
公开(公告)日：2013-09-09
申请号：KR1020130027095
申请日：2013-03-14
Applicant: 국방과학연구소
Abstract: PURPOSE: A manual sonar system and a demodulation of envelop modulated on noise (DEMON) process improving method thereof are provided to accurately reflect tonal signal frequencies existing adjacent to the manual sonar using radiated noise, thereby remarkably improving the accuracy of analyzing the number of the rotation of a propeller shaft, the number of the rotation of propeller blades, and the number of shafts of a vessel. CONSTITUTION: A manual sonar system includes a tonal processing module (30) and manual sonar (1). The tonal processing module receives the radiated noise signals spread underwater. The tonal signal frequencies included in the radiated noise signals are removed. The manual sonar is composed of a cavitation processing module (20) converting the radiated noise signals in the state that interference is removed by the removal of the tonal signal frequencies and extracting propeller cavitation noise signals included in the radiated noise signals. [Reference numerals] (AA) Radiated noise signal
Abstract translation: 目的：提供手动声纳系统和包络调制噪声（DEMON）过程改进方法的解调，以准确反映使用辐射噪声的手动声纳附近存在的音调信号频率，从而显着提高分析数字的精度 传动轴的旋转，螺旋桨叶片的旋转次数和容器的轴的数量。 规定：手动声纳系统包括音调处理模块（30）和手动声纳（1）。 音调处理模块接收在水下扩散的辐射噪声信号。 包含在辐射噪声信号中的音调信号频率被去除。 手动声纳由空化处理模块（20）组成，该空化处理模块（20）通过去除音调信号频率并提取包含在辐射噪声信号中的螺旋桨气蚀噪声信号，在干扰被去除的状态下转换辐射噪声信号。 （附图标记）（AA）辐射噪声信号
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公开(公告)号：KR1020120065544A
公开(公告)日：2012-06-21
申请号：KR1020100126731
申请日：2010-12-13
Applicant: 국방과학연구소
Abstract: PURPOSE: A method for removing a clutter for detecting a moving target and a moving target detecting system using the same are provided to detect a moving target with a small calculation amount in comparison with linear detection algorithm using Hough transform. CONSTITUTION: A gating unit(133-1) loads and classifies detection materials from a detection material storage if the detection materials of a current detection cycle are received. A Hough parameter calculating unit(133-2) calculates a Hough parameter using the detection materials. A deciding unit(133-3) distinguishes a measurement value generated from a target by comparing Hough parameters. A confirming unit(133-4) loads the Hough parameters related to the overlapped detection materials among the detection materials from the target, leaves the Hough parameter similar to a linear line and removes the remaining detection materials as clutters.
Abstract translation: 目的：提供一种用于去除用于检测移动目标的杂波的方法和使用其的移动目标检测系统，以便与使用霍夫变换的线性检测算法相比，以小的计算量检测移动目标。 构成：如果接收到电流检测周期的检测材料，门控单元（133-1）将来自检测材料存储器的检测材料进行加载和分类。 霍夫参数计算单元（133-2）使用检测材料计算霍夫参数。 决定单元（133-3）通过比较霍夫参数来区分从目标产生的测量值。 确认单元（133-4）将来自目标的检测材料中与重叠检测材料相关的霍夫参数加载，将霍夫参数类似于线性线，并将剩余的检测材料作为杂交物除去。
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