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Underwater sound MODEM (modulator-demodulator) for underwater interphone

A walkie-talkie, underwater acoustic technology, applied in ultrasonic/sonic/infrasonic transmission systems, advanced technologies, electrical components, etc., can solve the problems of high cost, high power consumption, large size of underwater acoustic modems, etc., to achieve low cost and power consumption. The effect of low, reliable voice communication

Inactive Publication Date: 2012-12-12
HOHAI UNIV CHANGZHOU
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] In order to solve the problem that the underwater acoustic modem in the prior art has a large volume, high cost, and high power consumption, and is not suitable for underwater walkie-talkies, the present invention provides a low-cost, low-power consumption and small volume, which is easy to carry and can ensure underwater acoustic modem for long-time communication,

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  • Underwater sound MODEM (modulator-demodulator) for underwater interphone

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings.

[0038] First put an underwater acoustic MODEM 1 into the water at the underwater end, and connect it to a voice processor through the serial port 10. Such as figure 1 As shown, the underwater acoustic MODEM 1 is completely placed underwater, and is connected to the voice processor through the serial port 10 . The voice processor sends the compressed and coded voice data to the underwater acoustic MODEM 1 through the serial port, and the data is transmitted to the microprocessor 9 through the serial port 10, and the microprocessor 9 first stores the data in the buffer, and then divides the data into batches Packing is performed to form a data frame, and then encoding is performed, and then the encoded binary data is expressed as an electrical signal and sent to the FSK signal modulator 5 . The FSK signal modulator 5 converts the binary electrical signal into a 2FSK el...

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Abstract

The invention discloses an underwater sound MODEM (modulator-demodulator) for an underwater interphone, which can realize the underwater transmission of coded digital voice data. A single chip microcomputer (MSP430F149) is used as a data processing core, 2FSK (binary frequency shift keying) modulation-demodulation way is adopted, a small-sized receiving-transmitting integrated ultrasonic transducer under mass production and a conventional modulation-demodulation chip are used, a 12V lithium battery is used for supplying power, and an RS-232 (reference standard-232) standard serial interface is equipped. The maximal power consumption of the entire machine is 210mW, the maximal data transmission speed is 2.4kbps, the maximal valid communication distance is 300m, error rate is low, and the real-time performance is good. Since the underwater sound MODEM has characteristics of low cost, low power consumption and small size, the underwater sound MODEM is applicable to the underwater interphone. The underwater sound MODEM can be connected with a voice processor and is used for transparently transmitting the coded voice data, so that the reliable voice communication among diving working personnel can be guaranteed.

Description

technical field [0001] The invention relates to an underwater acoustic MODEM for an underwater walkie-talkie, belonging to the technical field of underwater acoustic communication. Background technique [0002] During the diving operation, the communication between underwater personnel and surface personnel, and between underwater personnel often use wireless underwater intercoms based on the principle of acoustic wave communication. Due to the complexity of underwater acoustic communication technology, underwater intercoms use underwater acoustic MDOEM The cost is higher and the volume is larger, which is obviously unfavorable for the design of the mass-produced mask-type underwater walkie-talkie in the market. The underwater acoustic MODEM disclosed by the invention has the characteristics of low cost, low power consumption and small volume, and is very suitable for mass-produced underwater interphones. [0003] Due to the complex and changeable marine environmental condi...

Claims

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Application Information

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IPC IPC(8): H04B11/00H04B13/02
CPCY02D30/70
Inventor 王斌朱昌平单鸣雷陈澄谢希李永强陈秉岩张秀平韩庆邦高远汤一彬殷澄李建
Owner HOHAI UNIV CHANGZHOU
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