Megahertz-level wide-beam high-power transmission-reception integrated acoustic array

Abstract

The invention provides a megahertz-level wide-beam high-power transmission-reception integrated acoustic array. The acoustic array is characterized in that the acoustic array comprises an emission array, a reception array, a signal transmission line and a packaging body, the emission array receives acoustic wave signals from the signal transmission line and emits megahertz-level, wide-beam, and high-power very high frequency acoustic wave signals to a water target, the reception array is used for receiving reflection echoes of the water target and sending reflection echo signals to the signal transmission line, a plurality of emission transducer plates form an emission group, a plurality of same emission groups are distributed side by side at intervals to form the emission array, the reception array is formed by a plurality of single reception transducer plates, the number of the reception transducer plates is consistent with the number of the emission transducer plates of one emission group, the signals between the emission transducer plates and between the emission groups are connected in a parallel manner, and the signals between the single reception transducer plates are connected in a parallel manner. According to the acoustic array, the functions are composite, the structure is compact, megahertz-level acoustic waves can be emitted, and the reflection echoes of the water target can be received.

Description

technical field [0001] The patent of the invention belongs to the field of transducers, and specifically relates to a megahertz-level wide-beam high-power transceiver integrated sound array. Background technique [0002] The echo characteristics of underwater targets in the megahertz frequency band are widely used in research fields such as target imaging and underwater acoustic simulation measurement. The currently developed megahertz-level sound arrays have obvious deficiencies in the following aspects. One is that the frequency of megahertz-level sound waves is very high, and the beam of the emission array is very narrow. At this time, the propagation loss of sound waves in water is large, resulting in short propagation distances. Therefore, it is difficult to increase the distance between the sound array and the target to increase the sound wave irradiation surface. The purpose of this is to make the emitted sound waves not completely cover the underwater target with a ...

AI Technical Summary

Problems solved by technology

One is that the frequency of megahertz-level sound waves is very high, and the beam of the emission array is very narrow. At this time, the propagation loss of sound waves in water is large, resulting in short propagation distances. Therefore, it is difficult to increase the distance between the sound array and the target to increase the sound wave irradiation surface. The purpose of this is to make the emitted sound waves not completely cover the underwater target with a certain volume, which will affect the measurement and analysis of its echo characteristics; the second is that the emission power of the underwater acoustic emission transducer is related to the size of its radiation surface. In order to enhance the echo signal, the radiation surface must be increased, but this will lead to an increase in the directivity of the emission array, making the emission beam narrower, making it difficult for sound waves to fully cover the target surface

Therefore, it is difficult for the currently developed megahertz-level acoustic array to simultaneously meet the requirements of the three index parameters of transmission frequency, beam width, and radiation power, and thus cannot meet the requirements for the measurement of VHF echo characteristics of underwater targets.

Images