High resolution underwater acoustic signal real-time spectrum analyzing system

Abstract

The invention discloses a high resolution underwater acoustic signal real-time spectrum analyzing system, and relates to an underwater acoustic observation monitoring device. The system is characterized in that the system comprises a signal acquisition unit which is used for converting an analog signal output by a hydrophone into a digital signal, and is composed of an analog / digital converter chip, a reference voltage chip and a single operational amplifier chip, a signal processing unit, a transceiver unit and a power supply conversion unit. The reference voltage chip generates reference voltage, and is connected with the reference voltage pin of the analog / digital converter chip through an emitter follower circuit composed of the single operational amplifier chip. The signal input pin of the analog / digital converter chip is connected with the output pin of a signal conditioning unit. The clock, the data output, the ready-to-receive pin of the analog / digital converter chip are connected with the signal processing unit. The signal processing unit is used for receiving the digital signal and carrying out high resolution real-time spectrum analyzing. The transceiver unit is used for transmitting a result of the signal processing unit and receiving an operation mode instruction. The power supply conversion unit is used for providing required voltage for the units.

Description

technical field [0001] The invention relates to underwater acoustic observation and monitoring equipment, more specifically, to a high-resolution underwater acoustic signal real-time spectrum analysis system that can be highly integrated in the underwater acoustic observation and monitoring equipment. Background technique [0002] Acoustic waves are the only carrier capable of long-distance transmission of information in the ocean. Underwater acoustic equipment is the most effective means of obtaining underwater information. Underwater acoustic observation and monitoring equipment is commonly used underwater acoustic equipment. The current underwater acoustic observation and monitoring equipment mainly includes acoustic buoys, acoustic submersible buoys, and drifting buoys. When using underwater acoustic observation and monitoring equipment to carry out acoustic investigation tasks, often when the host computer sends instructions to the underwater acoustic equipment, it is n...

AI Technical Summary

Problems solved by technology

The existing underwater acoustic detection buoy system can report the location, battery power and other information to the upper computer through the Beidou satellite, and store the collected acoustic signals in the storage medium inside the device. Only when the device is salvaged and recovered can the data be analyzed and processed , this communication method does not have too many restrictions on the location of the receiving host computer, but the maximum data volume of information sent by the Beidou communication module per minute is 78 bytes, which is far smaller than the data volume collected by underwater acoustic signals. It may take dozens or even hundreds of minutes to complete the transmission of a one-minute sound signal, and then the host computer can analyze and process the acoustic information to obtain the acoustic information. This method cannot realize real-time analysis

[0004] There are also some devices that use wireless communication technology to transmit the collected underwater acoustic data to the receiving host computer in real time. However, the receiving host computer in this way must be within a few kilometers to tens of kilometers of the underwater acoustic equipment to be effective, which is not practical in practical applications. It is easy to implement, and because this communication method requires a lot of power consumption, it is necessary to increase the battery reserve of the underwater acoustic device, which increases the size and weight of the underwater acoustic device

[0005] In short, the current underwater acoustic observation and monitoring equipment has certain defects, and cannot flexibly send real-time acoustic information to the host computer

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