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A Small Underwater Low Frequency Acoustic Transmitter

A transmitter and small water technology, applied in electrical components, transmission systems, etc., can solve the problems of accidental interference during the test process, pollution of useful sound signals, large size and weight, etc., to achieve simple and convenient debugging, improve noise signal strength, The effect of low number of devices

Inactive Publication Date: 2017-01-25
710TH RES INST OF CHINA SHIPBUILDING IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In underwater acoustics research, low-frequency sound sources are commonly used underwater equipment, and the conventional underwater acoustic signal transmission system composed of standard general-purpose underwater acoustic equipment such as signal generators, power amplifiers, and low-frequency transducers is not only relatively small in size and weight This kind of general-purpose equipment needs external AC power supply, so when testing in wild waters, the power generation equipment is often required to provide an external power supply, and the vibration and radiation noise of the power generation equipment spread underwater, and the It will pollute the useful acoustic signal emitted by the sound source of the underwater test, and bring unexpected interference to the test process

Method used

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  • A Small Underwater Low Frequency Acoustic Transmitter
  • A Small Underwater Low Frequency Acoustic Transmitter
  • A Small Underwater Low Frequency Acoustic Transmitter

Examples

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Embodiment Construction

[0029] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0030] This embodiment provides a small underwater low frequency acoustic transmitter, its system block diagram is as follows figure 1 As shown, the transmitter includes a signal generating circuit, a power amplifier circuit, a magnetoelectric flexural transducer and a battery pack.

[0031] signal generating circuit

[0032] The signal generating circuit includes two parts: a band-limited noise signal generator circuit and a digital signal generator circuit.

[0033] 1), band-limited noise signal generator circuit

[0034] The band-limited noise signal generator circuit uses the Zener diode to generate a broadband AC noise signal when it reaches the Zener voltage and works in an avalanche state. The broadband AC noise signal is amplified and band-pass filtered to form a band-limited noise signal. In this example, if figure 2 Shown is the band-limited...

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Abstract

The invention discloses an underwater low-frequency acoustic signal transmitter, which belongs to the technical field of underwater acoustics research. The transmitter includes a signal generating circuit, a power amplifying circuit, a magnetoelectric flextensional transducer and a battery pack; the signal generating circuit includes a band-limited noise signal generator circuit and a digital signal generator circuit; Sine single frequency signal, frequency modulation signal and frequency sweep signal; the power amplifier circuit includes two integrated power operational amplifiers, which respectively constitute a forward amplifier and a reverse amplifier, and the two output to the positive / negative input end of the magnetoelectric flextensional transducer ; The battery pack is used to supply power to the signal generation circuit and the power amplifier circuit; the signal generation circuit generates a low sine, frequency modulation, frequency sweep signal or a band-limited noise signal, and the signal is amplified by the power amplifier circuit to drive the magnetoelectric flextension. The device converts electrical energy into mechanical energy and emits it in the form of sound waves.

Description

technical field [0001] The invention relates to a device for transmitting underwater low-frequency acoustic signals, and belongs to the technical field of underwater acoustics research. Background technique [0002] In underwater acoustics research, low-frequency sound sources are commonly used underwater equipment, and the conventional underwater acoustic signal transmission system composed of standard general-purpose underwater acoustic equipment such as signal generators, power amplifiers, and low-frequency transducers is not only relatively small in size and weight This kind of general-purpose equipment needs external AC power supply, so when testing in wild waters, the power generation equipment is often required to provide an external power supply, and the vibration and radiation noise of the power generation equipment spread underwater, and the It will pollute the useful acoustic signal emitted by the underwater test sound source and bring unexpected interference to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/04H04B13/02
Inventor 付继伟高伟满令斌汪小亚刘晓东
Owner 710TH RES INST OF CHINA SHIPBUILDING IND CORP
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