Constant beamwidth biconical array and constant beamwidth biconical beamforming method

Abstract

The invention provides a constant beam width biconical array and a constant beam width biconical array beam forming method. Including a vector hydrophone and a vector hydrophone fixing frame, the vector hydrophone fixing frame includes two groups of circular frames with decreasing radii and two conical frames connecting the circular frames with decreasing radii 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 decreasing radii are connected by a cone frame to form a cone array, and the tops of the two cone arrays are connected to form a double cone array. The invention can be applied to noise measurement in the air and target detection, taking into account both the noise measurement in the shallow sea environment and the target detection in the deep sea environment, effectively improving the broadband detection and estimation capability of the underwater detection system, and effectively ensuring that the vector array is underwater. Robustness in operation, effectively improving the constant beamwidth of the array during measurement.

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 rapidly developing information technology has guided the world's progress in various fields, especially the marine field. Sonar arrays have played a very important role in noise measurement and target detection since the 1970s. It has high sensitivity, is sturdy and durable, and is inexpensive, which greatly promotes the development of sonar array technology. [0003] With the development of human society today, the ocean has attracted more and more people's attention. With the increasingly high requirements for underwater measurement and detection, and the continuous development of modern detection technology, many countries have designed very good sensor arrays, and the biggest advantages of double cone arrays are low cost, sm...

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

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