Acoustic coupling device for doppler sonar test
A Doppler sonar and acoustic docking technology, applied in radio wave measurement systems, instruments, etc., can solve the problem of damaging electromagnetic compatibility, unable to explain the technical status of sonar transducers, and unable to accurately measure the accuracy of Doppler sonar indicators and other issues, to achieve the effect of simple installation and disassembly
Inactive Publication Date: 2011-09-07
NAVAL UNIV OF ENG PLA
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Problems solved by technology
There are two disadvantages in testing with electrical docking. One is to use electrical docking to skip the sonar transducer, so the test results cannot explain the technical status of the sonar transducer.
The second is to use electrical docking, and the echo electrical signal is directly added to the electronic components of the sonar, which changes the actual working state of the Doppler sonar and destroys the electromagnetic compatibility
Third, it is impossible to accurately measure the accuracy index of Doppler sonar
Method used
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[0029] The implementation of the present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings, but they do not constitute a limitation to the present invention, and are only examples. At the same time, the advantages of the present invention will become clearer and easier to understand.
[0030] refer to Figure 1 to Figure 4 : present embodiment comprises the fixed base that is used for fixing Doppler sonar 12, transmitting transducer 9 and receiving transducer 10, on the surface of four transducers of Doppler sonar respectively by pressing device and matching The material 7 is docked with a transmitting transducer 9 , and the surface of a Doppler sonar transducer is jointly connected with a transmitting transducer 9 and a receiving transducer 10 , sharing a piece of matching material 7 . The matching material 7 is made of sound-transmitting rubber with a thickness of 15 mm, and its acoustic impedance ρc is consis...
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The invention provides an acoustic coupling device for a Doppler sonar test, comprising a fixed pedestal which is used for fixing the Doppler sonar (12), transmitting transducers (9) and receiving transducers (10). The device is characterized in that the surface of every transducer of the Doppler sonar is respectively butted with one transmitting transducer (9); one surface of the transducers of the Doppler sonar is butted with a transmitting transducer and a receiving transducer (10) jointly; binding surfaces between the transmitting transducers (9) or the receiving transducers (10) and the Doppler sonar transducers are provided with matching materials (7). Reliable acoustic coupling is realized between the transmitting transducers (9) and receiving transducers (10) and the surfaces of the Doppler sonar transducers by a hold-down gear which is fixed on the fixed pedestal. The device is applicable to land accuracy test of the Doppler sonar which adopts four transducers to be arranged according to beam directions, simplifies the process of the Doppler sonar accuracy test, lowers the test cost and shortens the test time.
Description
technical field [0001] The invention relates to sonar testing technology, in particular to an acoustic docking device for Doppler sonar testing. Background technique [0002] According to the principle of Doppler frequency shift, as long as there is relative motion between the sound source (or receiver) and the scatterer, the ground velocity of the carrier can be obtained by detecting the frequency shift of the seabed echo. Doppler sonar is usually four-beam orthogonal configuration (made by JANUS), the angle between each beam and the horizontal plane is 60°, and the angle between the horizontal projection of two adjacent beams is 90°, within the range of operating depth, each beam The ground velocity component can be measured, four beams can measure four ground velocity components, the velocity vector can be obtained through vector synthesis, and the depth of the carrier relative to the seabed can be measured at the same time. [0003] With the development of acoustic spee...
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IPC IPC(8): G01S7/52
Inventor 苑秉成陈喜黄雄飞
Owner NAVAL UNIV OF ENG PLA