Small-sized underwater low-frequency acoustic transmitter

Abstract

The invention discloses an underwater low-frequency acoustic transmitter, and belongs to the technical field of hydroacoustic survey. The transmitter comprises a signal generating circuit, a power amplifying circuit, a magneto-electric flextensional transducer and a battery pack, wherein the signal generating circuit comprises a band-limited noise signal generator circuit for generating a band limited noise signal and a digital signal generator circuit for generating a sinusoidal single-frequency signal, a frequency-modulated signal and a sweeping frequency signal; the power amplifying circuit comprises two integrated power operational amplifiers constructing a non-inverting amplifier and an inverting amplifier respectively which are connected to the positive / negative input ends of the magneto-electric flextensional transducer; the battery pack is used for supplying power to the signal generating circuit and the power amplifying circuit. The signal generating circuit is used for generating a low-frequency sinusoidal signal, the frequency-modulated signal, the sweeping frequency signal or the band-limited noise signal. After the signals are amplified by the power amplifying circuit, the magneto-electric flextensional transducer is driven to transform electric energy into mechanical energy, and the mechanical energy is emitted 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...

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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

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