Constant-beam-width biconical array and constant-beam-width biconical array beam forming method

Abstract

The invention provides a constant-beam-width biconical array and a constant-beam-width biconical array beam forming method. A vector hydrophone body and a vector hydrophone fixing frame are provided,the vector hydrophone fixing frame comprises two groups of circular frames of which the radiuses are decreased progressively and two conical frames for connecting the circular frames of which the radiuses are decreased progressively into a cone; the same number of vector hydrophones are hung on each circular frame to form a circular array, a group of circular arrays with gradually decreased radiuses are connected through a conical frame to form a conical array, and the top ends of the two conical arrays are connected to form a biconical array. The method is suitable for noise measurement and target detection in the air. Noise measurement in a shallow sea environment and target detection in a deep sea environment are considered at the same time, the broadband detection estimation capabilityof the underwater detection system is effectively improved, the robustness of the vector array during underwater work is effectively ensured, and the constant beam width of the array in the measurement process is effectively improved.

Description

technical field [0001] The invention relates to an underwater volume array, and the invention also relates to a beam forming method based on the underwater volume array. Background technique [0002] The 21st century is the information age, and the rapid development of information technology has led the world's progress in various fields, especially in the marine field. Since the 1970s, sonar arrays have played a very important role in noise measurement and target detection. It has high sensitivity, is durable, and is cheap, which greatly promotes the development of sonar array technology. [0003] With the development of human society today, the ocean has attracted more and more attention from people. As the requirements for underwater measurement and detection become higher and higher, and modern detection technology continues to develop, many countries have designed excellent sensor arrays. Due to the influence of the ship's self-noise, high-quality field data with a h...

AI Technical Summary

Problems solved by technology

The early measurement methods used a single scalar sensor to measure the presence or absence of the target signal, and then developed arrays such as linear arrays, circular arrays, and cylindrical arrays to perform spatial filtering to form spatial gain for radiation noise measurement. However, the radiation noise of equipment in practical applications is often is a broadband signal

In the traditional method, the spatial gain beam changes with the frequency, and it is impossible to accurately obtain the accurate value of the radiated noise in the same area, so the formation needs to meet the requirement of constant beam width

Images