Abstract:
본 발명에 따른 수중 운동체의 난류 음향 특성 측정 장치는 수중에서 운동하는 수중 운동체; 상기 수중 운동체에 의해 형성된 난류의 특성을 수중에서 음향 센서를 통하여 측정하는 난류 음향 특성 측정부; 및 상기 난류 음향 특성 측정부의 위치를 나타내는 위치 신호를 수중에서 생성하여 출력하는 위치 신호 발생부를 포함하고, 상기 수중 운동체는 상기 위치 신호 발생부에서 출력된 위치 신호를 수신받아 분석함으로써 상기 난류 음향 특성 측정부의 위치를 인지할 수 있다. 난류, 위치, 수중 운동체, 센서, 음향
Abstract:
PURPOSE: An effective one-dimensional separation weighted value application method for a flat sensor alignment is provided to implement a transmission beam characteristic in which a one-dimensional separation weighted value is applied. CONSTITUTION: A flat sensor alignment indicates two-dimensional matrix according to the state of a sensor (a). The number of effective sensors is obtained according to the state of the sensor (b). A one-dimensional design weighted value of a two-dimensional weighted value is designed, and the result weighted value of the real two-dimensional weighted value is obtained (c). The error of a target weighted value is obtained from the set two-dimensional target weighted value (d). When the design of the one-dimensional weighted value is changed according to the change of the effective sensor, the one-dimensional design weighted value is set to minimize each error (e). The one-dimensional separation weighted value is applied to the sensors of the flat sensor alignment (f). [Reference numerals] (a) Flat sensor alignment is expressed in a 2D matrix depending on the existence of sensors; (b) Number of valid sensors of the 2D matrix is calculated regarding the existence of sensors in the horizontal and vertical directions; (c) 1D design weighted value, which reflects a 2D weighted value reflecting the number of the valid sensors in the horizontal and vertical directions, is designed and the horizontal and vertical result weighted values of the actual 2D weighted value, which is realized through a design process, are calculated; (d) Differences between the horizontal and vertical result weighted values and a selected 2D target weighted value are calculated; (e) 1D design weighted value which minimizes errors in the horizontal and vertical directions is set as a 1D separation weighted value; (f) Set 1D separation weighted value of the horizontal and vertical directions is applied to the sensors of the flat sensor alignment
Abstract:
PURPOSE: A FM target signal detector using a correlation arrangement sum filter and a method thereof are provided to obtain a correlation result of high precision according to a target Doppler shift frequency change, thereby rearranging and summing the obtained correlation result of the high precision. CONSTITUTION: A correlation arrangement sum filter delays and rearranges each of a plurality of FM Doppler correlation results. The correlation arrangement sum filter sums the rearranged FM Doppler correlation results. The correlation arrangement sum filter finds a function of a correlation degree for a received target signal. A multiplier multiplies a result value of the correlation arrangement sum filter and a predetermined scale value. A comparator compares the result value of the multiplier and a detection standard value of a target. The comparator determines a location and whether or not of existing of the target. [Reference numerals] (AA) Target detector; (BB) s'(n) rearrangement sum filter correlator; (CC) Comparator; (DD) Target detection and position information; (EE) Relation degree
Abstract:
PURPOSE: A device and a method for computing a real-time spectrum and a recording medium for recording the method are provided to reduce the amount of required computation. CONSTITUTION: A device for computing a real-time spectrum comprises an input module(510), a serial/parallel converter(520), a processor(530), and an output module(540). The input module receives a time domain signal. The serial/parallel converter converts the time domain signal into serial data and transmits the serial data to the processor. The processor computes spectrum data from the serial data. The output module outputs the computed spectrum data to the outside.
Abstract:
본 발명은 수상함의 기포항적에 대한 음향 및 영상 신호 특성의 상관관계 모델을 이용한 상대 신호의 특성 추정방법에 관한 것이다. 본 발명의 방법은 a)수상함의 기포항적에 대한 음향 신호 또는 영상 신호를 획득하는 단계; b)획득된 신호가 음향 신호인지 영상 신호인지를 판별하는 단계; c)획득된 신호가 영상 신호인 경우, 그 영상 신호를 이용한 기포항적의 특성을 분석하여 기포항적의 특성값들을 추출하는 단계; d)추출된 기포항적의 특성값들 중에서 음향 신호와 상관 관계가 있는 영상 특성값을 추출하는 단계; e)추출된 영상 특성값을 미리 생성된 음향 및 영상 신호의 상관관계 모델에 적용하는 단계; f)적용에 의해 기포항적에 대한 음향 신호의 특성 추정값을 획득하는 단계; g) 상기 단계 b)의 판별에서 획득된 신호가 음향 신호인 경우, 그 음향 신호를 이용한 기포항적의 특성을 분석하여 기포항적의 특성값들을 추출하는 단계; h)추출된 기포항적의 특성값들 중에서 영상 신호와 상관 관계가 있는 음향 특성값을 추출하는 단계; i)추출된 음향 특성값을 상기 음향 및 영상 신호의 상관관계 모델에 적용하는 단계; 및 j)적용에 의해 기포항적에 대한 영상 신호의 특성 추정값을 획득하는 단계를 포함한다. 수상함, 기포항적, 음향, 영상, 신호, 상관관계, 모델, 특성, 추정
Abstract:
PURPOSE: A position stabilizer for underwater equipment is provided so that underwater equipment stably maintains the mounting position according to the change of an underwater environment, such as tidal current, and can adjust the stability according to the degree of the change. CONSTITUTION: A position stabilizer for underwater equipment comprises a body(1), a propeller(2), a motor(3), a motor controller(5), a cable connecting part(6), an upper connecting part(7) and a lower connecting part(8). The body comprises a closed space of a cylindrical shape. The rotating center of the propeller is located at the inner center of the body and the propeller is rotatably supported along the perimeter of the body. The motor supplies the torque to the rotary shaft of the propeller through a power transfer unit. The motor controller controls the rotating number of the motor. The cable connecting part is connected to the motor controller and is attached to the body transfer the power and a control signal. The upper connecting part is formed on the upper center of the body. The lower connecting part is formed on the lower center of the body.
Abstract:
PURPOSE: A method for measuring a physical characteristic of air bubble wake of an ocean ship using a portable sensor is provided to obtain the same measuring effect to a multi sensor of two dimension without the two-dimensional multi-sensor. CONSTITUTION: A method for measuring a physical characteristic of air bubble wake of an ocean ship using a portable sensor is as follows. A measuring ship with a sensor for measuring the physical characteristic of the bubble wake of a ocean ship is prepared(S401). Bubble wake is generated by the moving of an ocean ship for measuring the physical characteristic of the bubble wake of the ocean ship(S402). The physical characteristic of the bubble wake is measured using the sensor and the measured signal information and the location information of the ocean ship and the measuring ship at the time of measurement are stored together(S403). The measured location difference depending on the measured time of the physical characteristic signal of the bubble wake measured is corrected(S404).