Abstract:
The present invention relates to a hexaza[3.3.3]propellane compound denoted by chemical formula I capable of being used as a major skeleton structure of a new molecular explosive, and a method for preparing the same. In the chemical formula I: R is a foreign atom selected from H, oxygen, nitrogen, sulfur, or halogen, or C-20 alkyl, cycloalkyl, arylalkyl, or aryl capable of including an unsaturated group; and X is H2, O, or S.
Abstract:
PURPOSE: A method for forming a hetero frequency beam and a sonar system using the same are provided to improve position estimating accuracy by being applied entire beam formation which processes a signal underwater sound. CONSTITUTION: A hetero frequency beam former(65) estimates frequency slope between snapshots which are generated by an underwater sound wave conveyance phenomenon using target information which is detected a sonar system. A hetero t frequency beam is formed by estimating a frequency slope between snapshots which is generated through a sound wave conveyance phenomenon of underwater and applying hetero frequency addition between the snapshots. A detector(66) detects target information using beam power from the hetero frequency beam former.
Abstract:
본 발명은 음파 펄스를 이용하여 표적의 방위와 거리를 추정하는 소나시스템에 관한 것으로서, 수중의 수직음속 구조를 고려하여 능동소나의 수중에 존재하는 표적을 탐지하는 능동소나는 음파펄스를 음파펄스는 직선이 아닌 다중경로로 반사와 굴절에 의한 다중경로 전달현상을 적용함으로써, 능동소나에서 표적거리 오차를 추정할 수 있는 방법 및 능동형 소나시스템이다. 소나시스템,sonar
Abstract:
A signal cable integrated acoustic sensor line array system is provided to prevent an external pressure from being delivered to an acoustic sensor assembly by seamlessly integrating the acoustic sensor on a signal cable. A signal cable integrated acoustic sensor line array system comprises a signal cable and plural acoustic sensor assemblies. The signal cable includes a high-tension member, a signal line, and a power line. The acoustic sensor assemblies are arranged along the signal cable and integrated with the signal cable. The acoustic sensor assembly detects an underwater sonic signal. The acoustic sensor assembly includes an underwater sound collector assembly(10), a water-tight connector(11), an integrated mount(12), and a protective cover(13). The underwater sound collector assembly converts an underwater sonic signal to an electric signal. The water-tight connector delivers acoustic signals between the signal cable and the underwater sound collector assembly. The water-tight connector is attached to the integrated mount. The protective cover encloses the underwater sound collector assembly and the integrated mount.
Abstract:
PURPOSE: A method for preparing a hexaza[3.3.3]propellane compound is provided to induce smooth synthesis by applying proper protecting groups, and to ensure high latent energy. CONSTITUTION: A hexaza[3.3.3]propellane compound is denoted by chemical formula I. In the chemical formula I: R is H, C_1-C_20 alkyl, C_3-C_20 cycloalkyl, or C_7-C_20 wherein, the alkyl and aryl contains a heterogeneous atom or an unsaturated group selected from oxygen, nitrogen, sulfur, and halogen; and X is O or S. The compound is used for manufacturing a molecular explosive.
Abstract:
PURPOSE: A method for estimating a target range error and a sonar system thereof is provided to accurately a target distance and a distance error by estimating a transfer path through real underwater conditions. CONSTITUTION: A method for estimating a target range error and a sonar system thereof are comprised of steps: setting a target range to estimate the distance error of the target; inputting the marine conditions of a target area; estimating a detection range and an approach time and water pressure in a multiple path, distance, and water depth; and filtering the sound paths of the multiple path to extract a sound path in which a sound pressure is strongest or through which a sound is approached to the target area first.