Noise measurement apparatus based on fiber optic hydrophone array and measurement method thereof
A fiber optic hydrophone, noise measurement technology, applied in measurement devices, measurement of ultrasonic/sonic/infrasonic waves, instruments, etc., to achieve good practical value and social benefits.
Active Publication Date: 2015-04-22
BEIJING SHENZHOU PUHUI TECH
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[0004] The purpose of the present invention is to propose a radiation noise measurement device and method for underwater vehicles in view of the deficiencies in the existing radiation noise measurement technology and the urgent needs of underwater vehicle vibration reduction and noise reduction research and equipment performance evaluation. The present invention can perform dynamic holographic radiation noise measurement on the underwater vehicle in the actual navigation state, and provides a comprehensive and effective means for the positioning research of the main noise source of the underwater vehicle and other targets and the evaluation of the shock and noise reduction effect
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[0023] The specific implementation of the content of the present invention will be further illustrated below in conjunction with the accompanying drawings, but the actual production parameter selection, materials and structural dimensions of the present invention are not limited to those given in the examples.
[0024] see figure 1 , figure 2 , image 3 , this embodiment is designed as a planar array of fiber optic hydrophones with 2048 primitives, which can be used for the actual flight dynamic holographic measurement of the measured object with the distance between noise sources not greater than 3m and the frequency band range below 5KHz.
[0025] The fiber optic hydrophone area array 2 is composed of a fiber optic hydrophone line array and a mounting bracket. The parameters of the fiber optic hydrophone line array are 128×16 primitives, and the array element spacing is 0.3m. According to this parameter, 16 fiber optic hydrophones are produced. The fiber optic hydrophone ...
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Abstract
The invention relates to a noise measurement apparatus based on a fiber optic hydrophone array and a measurement method thereof. The measurement apparatus is characterized in that a data acquisition and transmission system consists of a measuring boat data acquisition system, a composite cable winch and a photoelectric composite cable. A fiber optic hydrophone planar array is fixed at an underwater platform; four underwater acoustic beacons are respectively installed at the four corners of the underwater platform; and the fiber optic hydrophone planar array is connected with the measuring boat data acquisition system by the photoelectric composite cable. The photoelectric composite cable is contracted or released by the composite cable winch arranged at the measuring boat. An underwater navigation body sails in the water under the fiber optic hydrophone planar array under the guidance of the underwater acoustic beacons. According to the invention, dynamic and holographic radiation noise measurement of the underwater navigation body can be carried out in a practical navigation state; defects of the existing radiation noise measurement technology method can be overcome; and urgent requirements of the damping and noise reduction research and equipment performance evaluation of the underwater navigation body can be met. Therefore, the noise measurement apparatus has the good practical value and good social benefits.
Description
technical field [0001] The invention belongs to the field of underwater noise measurement, and relates to a radiation noise measurement device and a measurement method of an underwater vehicle, in particular to a near-field holographic and actual navigation dynamic measurement of the distribution of radiation noise sources of an underwater vehicle Device and measurement method. Background technique [0002] The radiated noise of underwater vehicles has a major impact on its performance and the completion of missions. In order to achieve shock and noise reduction, designers and manufacturers have conducted a lot of research work and taken many technical measures, but the evaluation of its effect and There is still a lack of comprehensive and effective means to locate the main noise sources. [0003] At present, there are generally three types of measurement methods for radiated noise of underwater vehicles. The first type is the method based on far-field measurement. Condit...
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Inventor 张西建张海兵
Owner BEIJING SHENZHOU PUHUI TECH