Underwater talkback system based on optical fiber sensing technology

Abstract

The invention discloses an underwater talkback system based on an optical fiber sensing technology. The system comprises an audio signal input unit, a transmitting signal processing circuit, a transmitting terminal of a transmitting transducer and a receiving terminal including a receiving signal processing circuit and an audio signal output unit. The receiving terminal is provided with an optical fiber light path containing an optical fiber probe the optical fiber light path is used for completing detection over submarine sound signals. The receiving signal processing circuit is connected with the audio signal output unit and the optical fiber light path respectively. Acoustical signals are amplified through the transmitting terminal and then drive the transmitting transducer, the transmitting transducer transmits the amplified acoustical signals out, the acoustical signals reach the receiving terminal through the spread of water, the optical fiber probe of the receiving terminal completes signal receiving, and the unidirectional transmission of the signals is achieved. The transmitting terminal transmits acoustic waves, the acoustic waves reach the receiving terminal through the spread of the water, the unidirectional receiving of the signals is achieved, and the talkback process is achieved. According to the underwater talkback system based on the optical fiber sensing technology, the optical fiber sensing technology is used for achieving the receiving of the submarine sound signals, the optical fiber probe is adopted to replace a receiving transducer on the receiving terminal, a new receiving mode is formed, and thus the multiaspect performance of the underwater talkback system can be improved.

Description

technical field [0001] The invention relates to an underwater intercom system based on optical fiber sensing technology. Background technique [0002] The underwater intercom system is a communication system that uses water as the communication medium. Among the energy forms that use liquid as a transmission medium, the energy loss caused by the transmission in the form of sound waves is the smallest, and the transmission distance is the longest. Therefore, the current underwater intercom communication system first amplifies the acoustic signal to drive the transducer device at the transmitting end to emit high-power sound waves, and then uses the transducer device at the receiving end to receive the acoustic signal for signal analysis and processing. Next to the intercom function. However, there are many technical shortcomings in the traditional underwater intercom solution: [0003] 1. As a sensitive component, the transducer is a key component of underwater acoustic co...

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Problems solved by technology

[0003] 1. As a sensitive component, the transducer is a key component of underwater acoustic communication. From the current technology, it is difficult to improve the sensitivity of the transducer, which is also an important factor affecting the receiving sensitivity of the underwater acoustic intercom system.

[0004] 2. The transmitting end and the receiving end share a set of transducers, which cannot meet the requirements of simultaneous operation of the transmitting process and the receiving process. Only half-duplex communication can be achieved, but full-duplex communication cannot be achieved, which affects communication efficiency.

[0005] 3. Due to the low sensitivity of the receiving transducer, it is necessary to greatly increase the transmitting power of the transmitting transducer at the transmitting end in order to receive the transmitting sound wave within a certain distance, which consumes a lot of power

[0006] 4. Affected by the sensitivity of the receiving transducer, the receiving sensitivity of the system is low, which affects the effective communication distance between the receiving end and the transmitting end

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