A vibration sounder with adjustable diaphragm size and shape

Abstract

The present invention discloses the structural composition, operating principle, and usage of a vibration sounder with adjustable diaphragm size and shape. The vibration sounder designed and manufactured using this solution can control the inner and outer diaphragms to operate separately according to the needs of sound field simulation, thereby achieving the purpose of changing the size and shape of the vibration diaphragm, expanding the frequency coverage of the sound source field, thereby enriching the sound source field characteristics and improving its ability to simulate the sound field of different objects.

Description

Technical Field

[0001] The invention relates to the field of sound fields generated by piston sound sources, and in particular to a vibration sound generator with adjustable diaphragm size and shape. Background Art

[0002] When any ship is at sea, its main and auxiliary engines are operating, causing vibrations in the ship's structural components and radiating noise. Underwater radiated noise from ships poses several major risks to the ship: Radiated noise undermines the ship's concealment, providing search and detection information for enemy sonar equipment. Enemy acoustically guided torpedoes can track, identify, and attack the ship based on this radiated noise, thus posing a fatal threat to the ship. Radiated noise from ships can potentially detonate underwater weapons, such as acoustically fuzed mines and fish mines, posing a significant threat to the ship's own safety. Radiated noise from ships can also severely interfere with the ship's sonar equipment, even causing it to malfunction and prevent it from functioning properly. Therefore, radiated noise has become a significant factor threatening ship safety and compromising combat effectiveness.

[0003] The radiated sound field of a ship is usually composed of mechanical noise, propeller noise and hydrodynamic noise. The noise generated by the ship's machinery is mechanical noise and is part of the total ship noise; propeller noise is a mixed type of noise, which shares common characteristics and sources with mechanical noise and hydrodynamic noise. Hydrodynamic noise is the radiated noise generated by irregular water flow passing through a ship sailing in the sea and the noise caused by changes in hydrodynamic processes.

[0004] A ship is a volume target. However, when observed at a long distance, the scale of the ship is much smaller than the distance between the ship and the observation hydrophone. At this time, the sound waves emitted by each radiation noise source of the ship are equivalent to the sound waves emitted from a directional point sound source. At this time, the sound radiation characteristics of the ship's volume sound source degenerate into point source characteristics, and the sound field characteristics it produces can be simulated by the corresponding sounder.

[0005] A piston-type underwater sound source is a sound generator that uses a drive mechanism to reciprocate a rigid radiating surface (a piston) to radiate underwater sound waves. It is a high-performance, low-frequency, high-power, controllable sound source that not only achieves broadband radiation from infrasound to audio frequencies, but also allows for easy control of its spectral characteristics. The noise generated by ships has a wide frequency range in both infrasound and audio frequencies. Piston-type sound sources, with their strong low-frequency drive capability and excellent spectral control, are an important sound source simulation structure and are widely used in underwater sound field and target sound field simulation, underwater acoustic countermeasures, and seabed detection. In mine countermeasures and anti-submarine warfare, piston-type sound sources are often used to simulate the sound fields of ships and submarines. Sounders such as the UK's UW350 and UW600 and the Australian AAG and IAAG are used by navies and research institutions worldwide. These sounders all utilize pistons as their sound radiating elements.

[0006] However, after the existing piston-type sound source actuator and vibrating diaphragm are designed and formed, their sizes are usually fixed. The main structure of each type of actuator can only be matched with a diaphragm of the corresponding size, and disassembly and assembly are time-consuming and labor-intensive. The sound field characteristics of the piston sound source are not only related to the input control signal, but also to the size and shape of the diaphragm. This makes the sound field generated by the designed and formed piston sound source have certain limitations.

[0007] Therefore, it is necessary to design and develop a piston-type sound source with adjustable diaphragm size and shape, which can not only enrich the sound field characteristics generated by the sound source and make the sound field simulation more targeted, but also save costs and improve timeliness. Summary of the Invention

[0008] The purpose of the present invention is to design a piston-type sound source with adjustable diaphragm size and shape. The invention can change the size and shape of the vibrating diaphragm according to the needs of sound field simulation, expand the frequency coverage range of the sound source sound field, thereby enriching the sound field characteristics of the sound source and improving its sound field simulation ability for different objects.

[0009] The object of the present invention is achieved as follows: a vibration sounder with an adjustable diaphragm size and shape, the vibration sounder including an inner ring sounder, an outer ring sounder, a micromotor, a latch, and a latch interface, the micromotor drives the latch to extend or retract to achieve the connection or separation of the latch and the latch interface; when the latch is connected to the latch interface, the inner ring sounder and the outer ring sounder work simultaneously, and when the latch is separated from the latch interface, the inner ring sounder and the outer ring sounder can work independently; the inner ring sounder and the outer ring sounder include an electro-hydraulic servo system to drive them independently.

[0010] Furthermore, the inner ring sounder includes an inner ring servo valve, an inner ring servo cylinder, an inner ring piston, an inner ring diaphragm, an inner ring movable sealing ring and an inner ring diaphragm limiting mechanism, wherein the inner ring servo valve converts electrical energy into hydraulic energy, the inner ring servo valve is connected to the inner ring servo cylinder, the inner ring servo cylinder is connected to the inner ring piston, the piston rod of the inner ring piston is connected to the inner ring diaphragm of the sounder, the inner ring movable sealing ring is integrally connected to the inner ring diaphragm, and the upper end of the inner ring servo cylinder is provided with an inner ring diaphragm limiting mechanism for limiting the maximum displacement of the inner ring diaphragm.

[0011] Furthermore, the inner ring servo valve is composed of a moving coil force motor and a sliding valve type hydraulic amplifier. The valve core of the sliding valve type hydraulic amplifier can generate a linear displacement proportional to the input signal current. This displacement controls the direction and flow of the high-pressure liquid flow entering the inner ring servo cylinder, thereby controlling the movement displacement of the inner ring diaphragm.

[0012] Furthermore, the outer ring sounder includes an outer ring servo valve, an outer ring servo cylinder, an outer ring piston, an outer ring diaphragm, an outer ring movable sealing ring and an outer ring diaphragm limiting mechanism, wherein the outer ring servo valve performs electrical energy-hydraulic energy conversion, the outer ring servo valve is connected to the outer ring servo cylinder, the outer ring servo cylinder is connected to the outer ring piston, the piston rod of the outer ring piston is connected to the outer ring diaphragm of the sounder, the outer ring movable sealing ring is integrally connected to the outer ring diaphragm, and the upper end of the outer ring servo cylinder is provided with an outer ring diaphragm limiting mechanism for limiting the maximum displacement of the outer ring diaphragm.

[0013] Furthermore, the outer ring servo valve is composed of a moving coil force motor and a sliding valve type hydraulic amplifier. The valve core of the sliding valve type hydraulic amplifier can generate a linear displacement proportional to the input signal current, control the direction and flow of the high-pressure liquid flow entering the outer ring servo cylinder, and then control the movement displacement of the outer ring diaphragm.

[0014] Furthermore, when the inner and outer ring sounders need to work at the same time, the outer ring servo valve adjusts the height of the outer ring diaphragm plate so that the height of the outer ring diaphragm plate is consistent with that of the inner ring diaphragm plate. The micromotor drives the connecting pin telescopic rod to extend and dock with the pin interface to connect the inner ring diaphragm plate and the outer ring diaphragm plate into one.

[0015] Furthermore, the servo valve adopts a multi-layer servo valve structure to achieve the change of the radiated sound field.

[0016] Furthermore, the shapes of the inner and outer vibration diaphragm plates include circular plates, circular ring plates, elliptical plates, elliptical ring plates, square plates, and square ring plates.

[0017] Beneficial effects:

[0018] Due to the aforementioned structural composition, the present invention can control the operation of the piston sound source through the inner and outer servo valves, enabling the inner diaphragm to operate independently, the outer diaphragm to operate independently, or both diaphragms to operate together. The vibrating sound generator designed and manufactured using this solution can control the operation of the inner and outer diaphragms separately according to the needs of sound field simulation, thereby achieving the purpose of changing the size and shape of the vibrating diaphragm, expanding the frequency coverage of the sound source's sound field, thereby enriching the sound source's sound field characteristics and improving its sound field simulation capabilities for different objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described in further detail below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention

[0021] Among them, 1-inner ring servo valve, 2-inner ring servo cylinder, 3-inner ring piston, 4-inner ring diaphragm, 5-inner ring movable sealing ring, 6-inner ring diaphragm limiting mechanism, 7-outer ring servo valve, 8-outer ring servo cylinder, 9-outer ring piston, 10-outer ring diaphragm, 11-outer ring movable sealing ring, 12-outer ring diaphragm limiting mechanism, 13-latch, 14-latch interface. DETAILED DESCRIPTION

[0022] like Figure 1 As shown, a vibration sounder with adjustable diaphragm size and shape includes an inner ring sounder, an outer ring sounder, a micromotor, a latch 13, and a latch interface 14. The micromotor drives the latch 13 to extend and retract, and the latch 13 and the latch interface 14 are plugged in or separated. When the latch 13 is plugged in to the latch interface 14, the inner ring sounder and the outer ring sounder work simultaneously. When the latch 13 and the latch interface 14 are separated, the inner ring sounder and the outer ring sounder can work independently. The inner ring sounder and the outer ring sounder include an electro-hydraulic servo system to drive them independently.

[0023] The inner ring sounder includes an inner ring servo valve 1, an inner ring servo cylinder 2, an inner ring piston 3, an inner ring diaphragm 4, an inner ring movable sealing ring 5 and an inner ring diaphragm limiting mechanism 6, wherein the inner ring servo valve 1 is composed of a moving coil force motor and a sliding valve hydraulic amplifier to convert electrical energy into hydraulic energy. The inner ring servo valve 1 is connected to the inner ring servo cylinder 2, and the inner ring servo cylinder 2 is connected to the inner ring piston 3. The piston rod of the inner ring piston 3 is connected to the inner ring diaphragm 4 of the sounder, and the inner ring movable sealing ring 5 is integrally connected to the inner ring diaphragm 4. The upper end of the inner ring servo cylinder 2 is provided with an inner ring diaphragm limiting mechanism 6 to limit the maximum displacement of the inner ring diaphragm 4.

[0024] When the inner ring sounder operates independently: the outer ring servo valve 7 is disconnected, and a signal current is input to the inner ring servo valve 1. The electromotive force generated by this signal current causes the inner ring servo valve's spool to produce a linear displacement proportional to the input signal current, controlling the direction and flow of high-pressure fluid entering the inner ring servo cylinder 2 (actuator). This in turn drives the inner ring piston 3, which in turn, through the piston rod, drives the load, i.e., the inner ring diaphragm. The inner ring movable seal 5 assembly moves with the reciprocating motion of the inner ring diaphragm 4. This sealing device separates the inside and outside of the housing at the diaphragm, providing both static and dynamic sealing. The inner ring diaphragm limiter 6 limits the maximum displacement of the inner ring diaphragm 4 to prevent damage to the servo cylinder mechanism. When an alternating signal current is input, the radiating piston vibrates back and forth, radiating sound waves.

[0025] The outer ring sounder includes an outer ring servo valve 7, an outer ring servo cylinder 8, an outer ring piston 9, an outer ring diaphragm 10, an outer ring movable sealing ring 11 and an outer ring diaphragm limiting mechanism 12, wherein the outer ring servo valve 7 is composed of a moving coil force motor and a sliding valve hydraulic amplifier to convert electrical energy into hydraulic energy. The outer ring servo valve 7 is connected to the outer ring servo cylinder 8, and the outer ring servo cylinder 8 is connected to the outer ring piston 9. The piston rod of the outer ring piston 9 is connected to the outer ring diaphragm 10 of the sounder, and the outer ring movable sealing ring 11 is integrally connected to the outer ring diaphragm 10. The upper end of the outer ring servo cylinder 8 is provided with an outer ring diaphragm limiting mechanism 12 to limit the maximum displacement of the outer ring diaphragm 10.

[0026] When the outer ring sounder operates independently, the inner ring servo valve 1 is disconnected, and the outer ring servo valve 7 converts electrical energy into hydraulic energy. Under the electromotive force generated by the input signal current, the spool of the outer ring servo valve 7 produces a linear displacement proportional to the input signal current, controlling the direction and flow of high-pressure fluid entering the outer ring servo cylinder 8 (actuator), pushing the outer ring piston 9, which in turn drives the load, the outer ring diaphragm 10, through the piston rod. The outer ring movable seal 11 assembly moves with the reciprocating motion of the outer ring diaphragm 10. This seal separates the inside and outside of the housing at the diaphragm, providing both static and dynamic sealing. The outer ring diaphragm limiter 12 limits the maximum displacement of the outer ring diaphragm 10 to prevent damage to the servo cylinder mechanism. When the input is an alternating signal current, the radiating piston reciprocates, radiating sound waves.

[0027] When the inner and outer ring sounders are working: when the inner and outer ring diaphragms need to work at the same time, first the outer ring servo valve 7 works, and slowly adjusts the height of the outer ring diaphragm 10. When the outer ring diaphragm 10 is at the same height as the inner ring diaphragm 4, the micromotor drives the connecting pin 13 to extend the telescopic rod of the micromotor-driven connecting pin 13 and complete the docking with the pin interface 14. Then work according to the steps shown in (1), which will drive the inner ring diaphragm 4 and the outer ring diaphragm 10 to work together.

[0028] Preferably, the servo valve whose action can be adjusted at any time during operation includes but is not limited to a double-layer servo valve structure, that is, a multi-layer servo valve structure can be adopted to adjust the combination of the vibration diaphragm plates to achieve changes in the radiated sound field.

[0029] Preferably, the shapes of the inner and outer vibration diaphragm plates include but are not limited to circular plates, circular ring plates, elliptical plates, elliptical ring plates, square plates, square ring plates, etc.;

[0030] Due to the aforementioned structural composition, the present invention can control the operation of the piston sound source through the inner ring servo valve 1 and the outer ring servo valve 7. The inner ring diaphragm can operate independently, the outer ring diaphragm can operate independently, or both the inner and outer ring diaphragms can operate together. The vibration sound generator designed and manufactured using this solution can control the operation of the inner and outer ring diaphragms separately according to the needs of sound field simulation, thereby achieving the purpose of changing the size and shape of the vibration diaphragm, expanding the frequency coverage of the sound source sound field, thereby enriching the sound source sound field characteristics and improving its sound field simulation capabilities for different objects.

Claims

1. A vibration sounder with adjustable diaphragm size and shape, characterized by: The vibration sounder includes an inner ring sounder, an outer ring sounder, a micromotor, a latch, and a latch interface. The micromotor drives the latch to extend or retract to achieve the connection or separation of the latch and the latch interface. When the latch is connected to the latch interface, the inner ring sounder and the outer ring sounder work simultaneously. When the latch is separated from the latch interface, the inner ring sounder and the outer ring sounder can work independently. The inner ring sounder and the outer ring sounder include an electro-hydraulic servo system to drive them independently.

2. The vibration sound generator according to claim 1, characterized in that: The inner ring sounder includes an inner ring servo valve, an inner ring servo cylinder, an inner ring piston, an inner ring diaphragm, an inner ring movable sealing ring and an inner ring diaphragm limiting mechanism, wherein the inner ring servo valve converts electrical energy into hydraulic energy, the inner ring servo valve is connected to the inner ring servo cylinder, the inner ring servo cylinder is connected to the inner ring piston, the piston rod of the inner ring piston is connected to the inner ring diaphragm of the sounder, the inner ring movable sealing ring is integrally connected to the inner ring diaphragm, and the upper end of the inner ring servo cylinder is provided with an inner ring diaphragm limiting mechanism for limiting the maximum displacement of the inner ring diaphragm.

3. The vibration sound generator according to claim 2, characterized in that: The inner ring servo valve consists of a moving coil force motor and a sliding valve type hydraulic amplifier. The valve core of the sliding valve type hydraulic amplifier can generate a linear displacement proportional to the input signal current. This displacement controls the direction and flow of the high-pressure liquid flow entering the inner ring servo cylinder, thereby controlling the movement displacement of the inner ring diaphragm.

4. The vibration sound generator according to claim 2, characterized in that: The outer ring sounder includes an outer ring servo valve, an outer ring servo cylinder, an outer ring piston, an outer ring diaphragm, an outer ring movable sealing ring and an outer ring diaphragm limiting mechanism, wherein the outer ring servo valve performs electrical energy-hydraulic energy conversion, the outer ring servo valve is connected to the outer ring servo cylinder, the outer ring servo cylinder is connected to the outer ring piston, the piston rod of the outer ring piston is connected to the outer ring diaphragm of the sounder, the outer ring movable sealing ring is integrally connected to the outer ring diaphragm, and the upper end of the outer ring servo cylinder is provided with an outer ring diaphragm limiting mechanism for limiting the maximum displacement of the outer ring diaphragm.

5. The vibration sound generator according to claim 4, characterized in that: The outer ring servo valve consists of a moving coil force motor and a slide valve type hydraulic amplifier. The valve core of the slide valve type hydraulic amplifier can generate a linear displacement proportional to the input signal current, controlling the direction and flow of the high-pressure liquid flow entering the outer ring servo cylinder, and thus controlling the movement displacement of the outer ring diaphragm.

6. The vibration sound generator according to claim 4, characterized in that: When the inner and outer ring sounders need to work at the same time, the outer ring servo valve adjusts the height of the outer ring diaphragm to make the outer ring diaphragm height consistent with the inner ring diaphragm. The micromotor drives the connecting pin telescopic rod to extend and dock with the pin interface to connect the inner ring diaphragm and the outer ring diaphragm into one.

7. The vibration sound generator according to claim 3 or 5, characterized in that: The servo valve adopts a multi-layer servo valve structure to achieve the change of the radiated sound field.

8. The vibration sound generator according to claim 2 or 4, characterized in that: The shapes of the inner and outer vibration diaphragm plates include circular plate, circular ring plate, elliptical plate, elliptical ring plate, square plate and square ring plate.

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