Adjustable sound isolation test system and method

A test system and test method technology, applied in the direction of radio wave measurement systems, instruments, etc., can solve the problems of receiving/transmitting isolation test and research inconvenience, and the inability to maximize the beneficial contribution of the baffle, so that the test method is simple and easy operation, improving dynamic testing capabilities, and optimizing design effects

Active Publication Date: 2019-07-26
上海船舶电子设备研究所
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AI Technical Summary

Problems solved by technology

[0004] At present, there is no underwater acoustic test system dedicated to sound isolation measurement. Even if the test system is built with the help of existing underwater acoustic measurement equipment, the isolation test can only be carried out for underwater acoustic equipment with a fixed relative installation position, and it cannot be tested during the test process. According to the requirements of the test frequency band, the relative position and distance between the transmitting transducer and the cylinder, the receiving hydrophone and the cylinder or the baffle are adjusted in real time, and it is even more impossible to maximize the impact of the baffle in the working frequency band. Beneficial contribution of isolation
These defects bring a lot of inconvenience to the test and research of the entire system receiving / transmitting isolation

Method used

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  • Adjustable sound isolation test system and method

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Embodiment approach

[0070] The operating frequency range of the underwater acoustic equipment in this embodiment is 5kHz-15kHz, and the transmitting module 1 is composed of a signal generator WF1946B, a power amplifier L2 (including an impedance adapter), a voltage and current sampler VIT13 and an oscilloscope DSOX3104T. The transmitting transducer 2 uses a single inlaid ring transducer to work, the transmitting transducer cable is not load-bearing, and the transmitting transducer 2 is equipped with a special hanging rope to ensure that the posture of the transducer under water is stable and Coaxial with cylinder 8. When testing, the signal generator WF1946B generates a series of single-frequency pulse signals, set the frequency of the pulse signal to 10kHz, the amplitude to 1Vpp, the pulse width to 4ms, and the pulse period to 1s; the impedance of the transmitting transducer 2 is about 50Ω, and the power amplifier adapter is selected The appropriate gear, and after being amplified by the power a...

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Abstract

The invention provides an adjustable sound isolation test system and method. The adjustable sound isolation test system comprises a transmitting subsystem, a receiving subsystem and a cylinder body; the transmitting subsystem comprises a transmitting transducer, and the receiving subsystem comprises a first hydrophone and a second hydrophone, and the cylinder body is provided with a barrier plate;the transmitting transducer and the first hydrophone are located on the two sides of the barrier plate correspondingly; the transmitting transducer and the second hydrophone are located on the same side or the different side of the barrier plate; and the transmitting transducer and/or the first hydrophone can be displaced relative to the cylinder body. According to the adjustable sound isolationtest system and method, an adjustable device for receiving and transmitting transducers is added onto the cylinder body of existing underwater sound equipment, so that the defect that the existing underwater sound equipment cannot adjust the arrangement distance of the transducers in the sound isolation test system is overcome.

Description

technical field [0001] The invention relates to the field of underwater acoustic testing systems, in particular to an adjustable acoustic isolation testing system and method. Background technique [0002] In order to realize the function of transmitting while receiving, the existing underwater acoustic equipment requires that the underwater acoustic equipment has good acoustic isolation performance, that is, when the transmitting transducer transmits a high-power broadband signal, the receiving hydrophone is not affected by the transmitting signal, but still can Receive sonar signals from a distance. Usually, the appearance of underwater acoustic equipment is a cylindrical cylinder, and electronic equipment such as signal transmitters, receivers, and signal processing modules are loaded inside, and the receiving / transmitting transducers are coaxially installed on the cylinder. [0003] In order to meet the horizontal non-directional performance requirements of underwater ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/52
CPCG01S7/52004
Inventor 王敏慧胡健辉刘振君
Owner 上海船舶电子设备研究所
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