High-stability underwater acoustic standard device and manufacturing method
A high-stability, standard device technology, applied in the direction of instruments, sound wave re-radiation, and utilization of re-radiation, can solve problems such as inappropriate emission assessment standards, improve response flatness, improve temperature and pressure stability, and improve transmission Effect of Voltage Response
Pending Publication Date: 2021-10-22
THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP
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Problems solved by technology
Like the commonly used transmitting transducers, the transducers of this solution are made of PZT-4 material, the surface sealing material is sound-permeable rubber, and they work near the resonance frequency, so their performance changes with temperature and pressure are far greater than the measurement uncertainty of standard devices degree, it is not suitable as the launch assessment standard for standard devices
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[0025] The present invention will be described in detail below in conjunction with accompanying drawing and embodiment:
[0026] Such as figure 1 As shown, a high-stability underwater acoustic standard mainly includes a sensitive element assembly 1, a lower end cover 2, a support rod 3, an upper end cover 4, filling oil 5, a sound-permeable rubber sleeve 6, a wire 7, an electrical connector 8, Stainless steel pressure ring 9, oil-filled sealing screw 10, watertight shielded cable 11, cable head 12, fastening screw 13, etc. The two ends of the sound-transmitting rubber sleeve 6 are respectively connected with the upper end cover 4 and the lower end cover 2 to form a closed space, and the interior of the sound-transmitting rubber sleeve 6 is filled with oil 5 as a medium for energy transmission; multiple support rods 3 are installed in this space Inside and connected to the end faces of the upper end cover 4 and the lower end cover 2, a plurality of sensitive element assemblies...
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The invention discloses a high-stability underwater acoustic standard device and a manufacturing method. The underwater acoustic standard device is mainly composed of a sensitive element assembly, a supporting rod, an upper end cover, a lower end cover, an acoustic transmission rubber sleeve, filling oil, a stainless steel pressing ring, a watertight shielding cable and the like. The sensitive element selects a plurality of small-diameter piezoelectric ceramic circular tubes, the resonant frequency is higher than two times of the upper limit of the working frequency, and the sensitive element works away from the resonant frequency. A piezoelectric ceramic circular tube is flexibly hung in the supporting rod through the soft supporting pad, and the free vibration state is kept. A sound-transmitting rubber sleeve is selected as a sound-transmitting window, energy is transmitted through filling oil, and direct contact between a sensitive element and a sound-transmitting material is avoided. In the aspect of the manufacturing process, the sound-transmitting rubber sleeve, the upper end cover and the lower end cover are extruded, deformed and sealed through the stainless steel pressing rings, bubbles in the filling oil are removed through vacuumizing after the filling oil is filled, and the structural form and the manufacturing process ensure that the underwater acoustic standard device has good temperature, pressure and time stability and is suitable for serving as an assessment standard of an underwater acoustic measurement standard device.
Description
technical field [0001] The invention relates to the field of underwater acoustic measurement, in particular to a standard used for assessment of a standard device for underwater acoustic measurement, mainly a high-stability underwater acoustic standard and a manufacturing method thereof. Background technique [0002] Before and after World War II, with the needs of military struggle and ocean development, the discipline of underwater acoustic engineering was born. After decades of continuous development, the application of underwater acoustic engineering has become more and more extensive, and has been integrated into all aspects of daily life. The applications in the military mainly include various types of sonar systems, torpedo acoustic guidance, underwater mine acoustic fuze and underwater acoustic engineering. Countermeasure equipment and other equipment are mainly used in civilian applications such as marine communication, marine environment observation, oil and gas re...
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IPC IPC(8): G01S7/521G01S15/02
CPCG01S7/521G01S15/02
Inventor 何涛赵涵易文胜
Owner THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP