CN109647685B - Moving-magnetic underwater low-frequency sound source emitting device - Google Patents
Moving-magnetic underwater low-frequency sound source emitting device Download PDFInfo
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- CN109647685B CN109647685B CN201811599143.3A CN201811599143A CN109647685B CN 109647685 B CN109647685 B CN 109647685B CN 201811599143 A CN201811599143 A CN 201811599143A CN 109647685 B CN109647685 B CN 109647685B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/08—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with magnetostriction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/50—Application to a particular transducer type
- B06B2201/58—Magnetostrictive transducer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/70—Specific application
- B06B2201/74—Underwater
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Abstract
The invention provides a moving magnetic type underwater low-frequency sound source emitting device.A alternating voltage signal is input into an external magnetic circuit component through an electric control joint, the alternating voltage signal can drive the external magnetic circuit component to generate a corresponding alternating magnetic field, the alternating magnetic field can be transmitted to the moving magnetic circuit component and generates mutual repulsion and attraction with a constant magnetic field of the moving magnetic circuit component, so that the relative motion between the moving magnetic circuit component and the external magnetic circuit component is realized, and the moving magnetic circuit component drives a radiation film plate to radiate a sound field to water; therefore, the moving parts of the sound source emitting device are the radiation template, the rolling seal ring assembly and the moving magnetic circuit assembly, and the electric control joint is arranged on the outer magnetic circuit assembly, so that the moving parts of the sound source emitting device are directly connected through a wireless cable, the adaptability is good, the damage to the electric control joint possibly caused by the movement of the moving magnetic circuit assembly is avoided, and the working reliability of the sound source emitting device is improved.
Description
Technical Field
The invention belongs to the technical field of underwater acoustic communication, and particularly relates to a moving-magnet type underwater low-frequency sound source emitting device.
Background
The method for inducing the action of the mine by simulating the ship noise by using the broadband sound source is the most common method for audio frequency mine sweeping operation, but with the development of the modern industrial level, the ship noise is smaller and smaller, the processing capacity of a fuze on an acoustic signal is stronger and stronger, so that the requirement of the mine sweeper on a traditional high-power sound source is weaker and the requirement on the similarity of the sound source for simulating the ship noise is higher and higher. Meanwhile, along with the development of the anti-mine capability of the building system, the integration requirement of the equipment is higher and higher, and the miniaturization and light weight of the sound source structure are an important direction for the development of the acoustic minesweeping tool.
According to the noise characteristics of ships and warships, the sound field frequency band range which needs to be covered by the sound minesweeping device is large, a single sound source is usually difficult to realize, and only a plurality of sound sources with different frequency bands can be combined and work simultaneously to generate a required broadband sound field. Among the current numerous broadband sound sources, the piston sound source has the advantages of large driving force, strong low-frequency radiation capability, capability of realizing frequency spectrum control, compact structure and the like, and is widely applied as a low-frequency sound source. The piston sound source is driven by adopting a hydraulic and electric mode, the existing electric mode usually adopts a moving coil mode, the moving coil mode refers to the rotation of an excitation coil, and a permanent magnet keeps still; therefore, in the process of rotation of the excitation coil, the enameled wire on the excitation coil is easy to collide with other components inside the sound source emitting device to be damaged, meanwhile, the excitation coil needs to be led in an external power supply in a wiring mode, so that an alternating magnetic field is generated, and if the excitation coil rotates continuously, the result of poor contact is easy to cause; therefore, the existing moving-coil sound source emitting device is limited in use and is easy to damage.
Disclosure of Invention
In order to solve the problems, the invention provides the moving magnetic type underwater low-frequency sound source emitting device, the cable is directly connected with the moving magnetic circuit component, the adaptability is good, the damage to the electric control joint possibly caused by the movement of the moving magnetic circuit component is avoided, and the working reliability of the sound source emitting device is improved.
A moving magnetic underwater low-frequency sound source emitting device comprises a rolling seal ring assembly 2, a radiation diaphragm plate 4, an outer magnetic circuit assembly 6, a moving magnetic circuit assembly 7, a shell 8 and an electric control joint 10;
the shell 8 is a hollow cylinder; the rolling seal ring assembly 2 is arranged at the periphery of the radiation diaphragm 4 and then integrally arranged at any end of the shell 8 together with the radiation diaphragm 4, so that the rolling seal ring assembly 2 is used for providing axial displacement for the radiation diaphragm 4;
the outer magnetic circuit assembly 6 is arranged in the shell 8, the moving magnetic circuit assembly 7 is nested in the outer magnetic circuit assembly 6, meanwhile, the outer magnetic circuit assembly 6 is fixedly connected with one end of the shell 8, which is not provided with the rolling seal ring assembly 2, and the moving magnetic circuit assembly 7 is fixedly connected with the radiation diaphragm plate 4;
the electric control joint 10 is arranged on the external magnetic circuit assembly 6 and is used for accessing an alternating voltage signal to the external magnetic circuit assembly 6 so as to enable the external magnetic circuit assembly 6 to generate an alternating magnetic field; the alternating magnetic field acts on the constant magnetic field generated by the moving magnetic circuit component 7, so that the moving magnetic circuit component 7 moves linearly along the axial direction of the moving magnetic circuit component, and further pushes the radiation diaphragm 4 to vibrate back and forth, and a sound field is radiated to the outside.
Further, the outer magnetic circuit assembly 6 comprises an upper cover plate 14, an upper coil 15, an outer magnetic conductive cylinder 17, a lower coil 18, a lower cover plate 19 and a bottom plate 20;
the outer magnetic conduction cylinder 17 is of a hollow cylindrical structure, and the middle part of the outer magnetic conduction cylinder extends along the radial direction to form an annular partition plate;
the upper cover plate 14 and the lower cover plate 19 are both annular panels and are respectively installed at two ends of the outer magnetic conductive cylinder 17, so that the upper coil 15 and the lower coil 18 are respectively packaged inside the outer magnetic conductive cylinder 17; wherein, the upper coil 15 and the lower coil 18 are completely the same and are respectively arranged at two sides of the annular clapboard;
the bottom plate 20 is installed on the other side of the lower cover plate 19, which is not in contact with the outer magnetic conduction cylinder 17, and is used for integrally packaging the upper cover plate 14, the upper coil 15, the outer magnetic conduction cylinder 17, the lower coil 18 and the lower cover plate 19 inside the shell 8; wherein, still open the mounting hole on the bottom plate 20, automatically controlled joint 10 sets up in the mounting hole, respectively for going up coil 15 and/or lower coil 18 access alternating voltage signal, wherein, when automatically controlled joint 10 was gone up coil 15 and lower coil 18 access alternating voltage signal simultaneously, the voltage signal size of going up coil 15 and lower coil 18 was the same, the opposite direction.
Further, the upper cover plate 14, the outer magnetic conduction cylinder 17 and the lower cover plate 19 are all provided with more than two through grooves with the same width along the radial direction, and the through grooves on the upper cover plate 14, the outer magnetic conduction cylinder 17 and the lower cover plate 19 are aligned with each other.
Further, the through grooves comprise inner circumferential through grooves and outer circumferential through grooves, and the inner circumferential through grooves and the outer circumferential through grooves are alternately distributed; wherein, the inner circumference through groove starts from the inner circumference of the upper cover plate 14, the outer magnetic conductive cylinder 17 and the lower cover plate 19 and extends in the radial direction; the outer circumferential through groove starts from the outer circumference of the upper cover plate 14, the outer magnetic conductive cylinder 17 and the lower cover plate 19 and extends radially.
Further, the moving-magnet type underwater low-frequency sound source emitting device further comprises an outer pressing plate 1 and an inner pressing plate 3;
the rolling seal ring assembly 2 is of an annular structure, and installation edges respectively extend outwards and inwards from the annular structure; the inner pressing plate 3 fixes the mounting edge inside the rolling seal ring assembly 2 on the circumference of the radiation diaphragm 4, and meanwhile, the outer pressing plate 1 fixes the mounting edge outside the rolling seal ring assembly 2 on the circumference of any end of the shell 8.
Further, the moving magnetic circuit assembly 7 includes a fixing frame 21, an upper inner magnetic iron 22, an upper permanent magnet 23, a lower inner magnetic iron 24, and a lower permanent magnet 25;
the fixing frame 21 is a hollow cylinder, and two annular grooves are formed in the outer surface of the cylinder;
the upper inner magnetic conductive iron 22 and the lower inner magnetic conductive iron 24 are respectively arranged in the two grooves, meanwhile, the upper permanent magnet 23 is arranged above the upper inner magnetic conductive iron 22, and the lower permanent magnet 25 is arranged above the lower inner magnetic conductive iron 24;
the directions of the generated constant magnetic fields of the upper permanent magnet 23 and the lower permanent magnet 25 are opposite.
Further, the upper inner magnetizer 22 and the lower inner magnetizer 24 are both composed of two magnetizers with semicircular structures; the upper permanent magnet 23 and the lower permanent magnet 25 are each composed of four magnets of 1/4 circular structure, and the polarization directions of the upper permanent magnet 23 and the lower permanent magnet 25 are along the diameter direction.
Further, the moving-magnet underwater low-frequency sound source emitting device further comprises a central magnetic conduction cylinder 16;
the central magnetic conduction cylinder 16 is nested inside the dynamic magnetic circuit component 7, and one end of the central magnetic conduction cylinder is fixedly connected to the bottom plate 20.
Further, the moving magnet type underwater low-frequency sound source emitting device further comprises a sliding bearing 5;
the sliding bearing 5 is fixedly connected inside one end of the central magnetic conduction cylinder 16 which is not fixedly connected with the bottom plate 20;
the radiation template 4 extends a rod-shaped structure towards the inside of the shell 8, and the rod-shaped structure extends into the sliding bearing 5.
Further, the moving magnetic underwater low-frequency sound source emitting device further comprises an air bag cover 12 and an air bag assembly 13, and a through hole is formed in the bottom plate 20;
the airbag cover 12 is mounted on the outer side of the base plate 20;
the air bag module 13 is installed inside the air bag cover 12 for supplementing air to the inside of the housing 8 through the through holes so that the pressure of the inner surface and the outer surface of the radiation template 4 is the same.
Has the advantages that:
the invention provides a moving magnetic type underwater low-frequency sound source emitting device.A alternating voltage signal is input into an external magnetic circuit component through an electric control joint, the alternating voltage signal can drive the external magnetic circuit component to generate a corresponding alternating magnetic field, the alternating magnetic field can be transmitted to the moving magnetic circuit component and generates mutual repulsion and attraction with a constant magnetic field of the moving magnetic circuit component, so that the relative motion between the moving magnetic circuit component and the external magnetic circuit component is realized, and the moving magnetic circuit component drives a radiation film plate to radiate a sound field to water; therefore, the moving parts of the invention are the radiation template, the rolling seal ring assembly and the moving magnetic circuit assembly, and the electric control joint is arranged on the outer magnetic circuit assembly, so that the moving parts of the invention are directly connected by a wireless cable, the adaptability is good, the damage to the electric control joint possibly caused by the movement of the moving magnetic circuit assembly is avoided, and the working reliability of the sound source emitting device is improved;
in addition, the outer magnetic circuit component and the moving magnetic circuit component of the sound source emitting device are two independent modules, so that the sound source emitting device is compact in structure and convenient to detach, install and use.
Drawings
Fig. 1 is a schematic structural diagram of a moving-magnet underwater low-frequency sound source emitting device provided by the invention;
FIG. 2 is a schematic structural view of a rolling seal ring assembly provided in the present invention;
FIG. 3 is a schematic structural view of an external magnetic circuit assembly according to the present invention;
FIG. 4 is a schematic view of the through groove provided in the present invention;
fig. 5 is a schematic structural diagram of a dynamic magnetic circuit assembly provided by the present invention;
FIG. 6 is a schematic view of the magnetic field polarization directions of the upper permanent magnet and the lower permanent magnet provided by the present invention;
FIG. 7 is a schematic diagram of the working principle of the sound source emitting device when the lower coil is energized with a forward voltage and the upper coil is energized with a reverse voltage according to the present invention;
fig. 8 is a schematic diagram of the working principle of the sound source emitting device when the lower coil is energized with a reverse voltage and the upper coil is energized with a forward voltage according to the present invention;
FIG. 9 is a schematic diagram of the operation principle of the sound source emitting device when the lower coil is energized with a forward voltage according to the present invention;
FIG. 10 is a schematic diagram of the operation principle of the sound source emitting device when forward voltage is applied to the upper coil according to the present invention;
1-outer pressing plate, 2-rolling sealing ring component, 3-inner pressing plate, 4-radiation film plate, 5-sliding bearing, 6-outer magnetic circuit component, 7-moving magnetic circuit component, 8-shell, 9-O type sealing ring, 10-electric control joint, 11-O type sealing ring, 12-air bag cover, 13-air bag component, 14-upper cover plate, 15-upper coil, 16-central magnetic cylinder, 17-outer magnetic cylinder, 18-lower coil, 19-lower cover plate, 20-bottom plate, 21-fixing frame, 22-upper inner magnetic iron, 23-upper permanent magnet, 24-lower inner magnetic iron, 25-lower permanent magnet and 26-rolling ring.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
Example one
Referring to fig. 1, the figure is a schematic structural diagram of a moving-magnet underwater low-frequency sound source emitting device provided in this embodiment. A moving magnetic type underwater low-frequency sound source emitting device comprises an outer pressing plate 1, a rolling seal ring assembly 2, an inner pressing plate 3, a radiation diaphragm plate 4, an outer magnetic circuit assembly 6, a moving magnetic circuit assembly 7, a shell 8 and an electric control joint 10;
the shell 8 is a hollow cylinder; the rolling seal ring assembly 2 is arranged at the periphery of the radiation diaphragm 4 and then integrally arranged at any end of the shell 8 together with the radiation diaphragm 4, so that the rolling seal ring assembly 2 is used for providing axial displacement for the radiation diaphragm 4; specifically, the method comprises the following steps: the rolling seal ring assembly 2 is of an annular structure, and installation edges respectively extend outwards and inwards from the annular structure; the inner pressing plate 3 fixes the mounting edge inside the rolling seal ring assembly 2 on the circumference of the radiation diaphragm 4, and meanwhile, the outer pressing plate 1 fixes the mounting edge outside the rolling seal ring assembly 2 on the circumference of any end of the shell 8.
The outer magnetic circuit assembly 6 and the moving magnetic circuit assembly 7 are both of hollow cylindrical structures which are arranged inside the shell 8, the moving magnetic circuit assembly 7 is nested inside the outer magnetic circuit assembly 6, the outer magnetic circuit assembly 6 is fixedly connected with one end, not provided with the rolling seal ring assembly 2, of the shell 8, and the moving magnetic circuit assembly 7 is fixedly connected with the radiation diaphragm plate 4.
The electric control joint 10 is arranged on the external magnetic circuit assembly 6 and is used for accessing an alternating voltage signal to the external magnetic circuit assembly 6 so as to enable the external magnetic circuit assembly 6 to generate an alternating magnetic field; the alternating magnetic field acts on the constant magnetic field generated by the moving magnetic circuit component 7, so that the moving magnetic circuit component 7 moves linearly along the axial direction of the moving magnetic circuit component, and further pushes the radiation diaphragm 4 to vibrate back and forth, and a sound field is radiated to the outside.
It should be noted that the moving magnetic circuit assembly 7 and the radiation film plate 4 are connected into a whole through screws, and the inner side of the outer edge of the radiation film plate 4 and the rolling seal ring assembly 2 are fixed together with the screws through the inner pressure plate 3. At the moment, the movable magnetic circuit assembly 7, the radiation diaphragm 4 and the rolling seal ring assembly 2 form an integral structure, the structure is installed with the outer magnetic circuit assembly 6, during installation, the movable magnetic circuit assembly 7 is nested inside the outer magnetic circuit assembly 6, and the outer edge of the rolling seal ring assembly 2 is connected with the shell body 8 through the outer pressing plate 1 and the screw, so that the movable magnetic circuit assembly 7 is sealed and isolated from the outside. The rolling seal ring assembly 2 is formed by bonding two rolling rings 26 in opposite directions, and oil can be filled in an internal cavity formed in order to ensure that the dynamic magnetic circuit assembly 7 is subjected to minimum damping during movement, as shown in fig. 2.
Therefore, according to the moving-magnet type underwater low-frequency sound source emitting device provided by the embodiment, the alternating voltage signal is input into the external magnetic circuit assembly through the electric control joint, the alternating voltage signal can drive the external magnetic circuit assembly to generate a corresponding alternating magnetic field, the alternating magnetic field can be transmitted to the moving magnetic circuit assembly, and the alternating magnetic field and the constant magnetic field of the moving magnetic circuit assembly generate mutual repulsion and attraction effects, so that the relative movement between the moving magnetic circuit assembly and the external magnetic circuit assembly is realized, and the moving magnetic circuit assembly drives the radiation film plate to radiate a sound field to water; therefore, the moving parts of the embodiment are the radiation template, the rolling seal ring assembly and the moving magnetic circuit assembly, and the electric control joint is arranged on the outer magnetic circuit assembly, so that the moving parts of the embodiment are directly connected by a wireless cable, the adaptability is good, the damage to the electric control joint possibly caused by movement is avoided, and the working reliability of the sound source emitting device is improved;
in addition, the outer magnetic circuit component and the moving magnetic circuit component of the sound source emitting device are two independent modules, so that the sound source emitting device is compact in structure and convenient to detach, install and use.
Example two
Based on the above embodiments, the present embodiment further describes an outer magnetic circuit assembly and a moving magnetic circuit assembly of a moving magnetic underwater low frequency sound source emitting device.
First, the external magnetic circuit assembly will be described in detail.
Referring to fig. 3, it is a schematic structural diagram of an external magnetic circuit assembly provided in this embodiment. The outer magnetic circuit assembly 6 comprises an upper cover plate 14, an upper coil 15, an outer magnetic conduction cylinder 17, a lower coil 18, a lower cover plate 19 and a bottom plate 20;
the outer magnetic conducting cylinder 17 is of a hollow cylindrical structure, and the middle part of the outer magnetic conducting cylinder radially extends to form an annular partition plate;
the upper cover plate 14 and the lower cover plate 19 are both annular panels and are respectively installed at two ends of the outer magnetic conductive cylinder 17, so that the upper coil 15 and the lower coil 18 are respectively packaged inside the outer magnetic conductive cylinder 17; wherein, the upper coil 15 and the lower coil 18 are completely the same and are respectively arranged at two sides of the annular clapboard;
the bottom plate 20 is installed on the other side of the lower cover plate 19, which is not in contact with the outer magnetic conduction cylinder 17, and is used for integrally packaging the upper cover plate 14, the upper coil 15, the outer magnetic conduction cylinder 17, the lower coil 18 and the lower cover plate 19 inside the shell 8; wherein, still open the mounting hole on the bottom plate 20, automatically controlled joint 10 sets up in the mounting hole, respectively for going up coil 15 and/or lower coil 18 access alternating voltage signal, wherein, when automatically controlled joint 10 was gone up coil 15 and lower coil 18 access alternating voltage signal simultaneously, the voltage signal size of going up coil 15 and lower coil 18 was the same, the opposite direction.
It should be noted that, when the external magnetic circuit assembly 6 is specifically assembled, the upper coil 15 and the lower coil 18 are first fixed on two sides of the annular partition plate in the external magnetic conductive cylinder 17, and during the fixing, a glue filling manner can be adopted to prevent loosening, and parameters such as the wire diameter and the number of turns of the winding are kept consistent when the upper coil 15 and the lower coil 18 are manufactured. An upper cover plate 14 and a lower cover plate 19 are respectively installed at two ends of the outer magnetic conductive cylinder 17, and are fixed through screws, so that the upper coil 15 and the lower coil 18 are fixed in two annular grooves formed by the outer magnetic conductive cylinder 17, the upper cover plate 14 and the lower cover plate 19, and an integral assembly is formed, and the integral assembly is connected with the bottom plate 20 into a whole through screws.
Optionally, an O-ring 11 is further disposed in the mounting hole of the bottom plate 20, and is used to achieve sealing between the electrical control connector 10 and the bottom plate 20, so that the sound source emitting device of this embodiment can be powered on and operated underwater.
It should be noted that when the upper coil 15 and the lower coil 18 are simultaneously energized, voltage signals with opposite directions and equal magnitudes are alternately accessed, electromagnetic fields with certain strength and directions are respectively generated inside the two coils, the magnetic fields are directly influenced by the magnitude and direction of the input voltage signal, and in order to ensure that most of formed magnetic lines of force form closed loop distribution around the outer magnetic conduction cylinder 17, the upper cover plate 14, the lower cover plate 19 and the air gap outside the coils, the outer magnetic conduction cylinder 17, the upper cover plate 14 and the lower cover plate 19 are made of materials with high magnetic permeability. Meanwhile, in order to prevent the magnetic field from generating a hysteresis effect when the magnetic field is transmitted inside the outer magnetic conduction cylinder 17, the upper cover plate 14 and the lower cover plate 19, optionally, more than two through grooves with the same width are radially formed in the upper cover plate 14, the outer magnetic conduction cylinder 17 and the lower cover plate 19, and the through grooves in the upper cover plate 14, the outer magnetic conduction cylinder 17 and the lower cover plate 19 are aligned with each other.
For example, refer to fig. 4, which is a schematic view of the through slot opening provided in the present embodiment. The through grooves comprise four inner circumference through grooves and four outer circumference through grooves, and the inner circumference through grooves and the outer circumference through grooves are alternately distributed; wherein, the inner circumference through groove starts from the inner circumference of the upper cover plate 14, the outer magnetic conductive cylinder 17 and the lower cover plate 19 and extends in the radial direction; the outer circumferential through groove starts from the outer circumference of the upper cover plate 14, the outer magnetic conductive cylinder 17 and the lower cover plate 19 and extends radially. The cable heads of the two coils can penetrate out to the electric control connector 10 through the grooves, the electric control connector 10 is fixed on the bottom plate 20 through screws, so that an external control system can control the working voltage in the upper coil 15 and the lower coil 18 through the electric control connector 10, and the size and the direction of the internal magnetic field formed by the electric control connector.
The moving magnetic circuit assembly 7 will be described in detail below.
Referring to fig. 5, it is a schematic structural diagram of the dynamic magnetic circuit assembly provided in this embodiment. The dynamic magnetic circuit component 7 comprises a fixed frame 21, an upper inner magnetic conductive iron 22, an upper permanent magnet 23, a lower inner magnetic conductive iron 24 and a lower permanent magnet 25;
the fixing frame 21 is a hollow cylinder, and two annular grooves are formed in the outer surface of the cylinder;
the upper inner magnetic conductive iron 22 and the lower inner magnetic conductive iron 24 are respectively arranged in the two grooves, meanwhile, the upper permanent magnet 23 is arranged above the upper inner magnetic conductive iron 22, and the lower permanent magnet 25 is arranged above the lower inner magnetic conductive iron 24;
the directions of the generated constant magnetic fields of the upper permanent magnet 23 and the lower permanent magnet 25 are opposite.
Optionally, the upper inner magnetizer 22 and the lower inner magnetizer 24 are both composed of two magnetizers with semicircular structures; the upper permanent magnet 23 and the lower permanent magnet 25 are each composed of four magnets of 1/4 circular structure, and the polarization directions of the upper permanent magnet 23 and the lower permanent magnet 25 are along the diameter direction.
That is, two annular grooves are designed on the fixing frame 21, the bottom of the upper groove is provided with the upper inner magnetizer 22, the upper inner magnetizer 22 is in a semicircular structure, two pieces are arranged in each groove, and a cylinder is formed and fixed on the fixing frame 21 through screws. And an upper permanent magnet 23 is arranged outside the groove, the upper permanent magnet 23 is in an 1/4 round structure, and the polarization direction is along the diameter direction. Each groove is formed into a circle by adopting 4 upper permanent magnets 23, the circle is arranged outside the upper inner magnetic conductive iron 22 and is fixed with the upper inner magnetic conductive iron 22 through coating adhesive, and the outside of the groove is wound by a thin adhesive tape. Because the polarization direction of the upper permanent magnet 23 is radial and perpendicular to the upper inner magnetizer 22, in order to ensure that most magnetic lines of force formed by the upper permanent magnet 23 can still be transmitted along the radial direction, the upper inner magnetizer 22 is made of a material with high magnetic permeability, and the fixing frame 21 is made of a non-magnetic material, such as aluminum alloy and titanium alloy. The lower inner magnetizer 24 and the lower permanent magnet 25 are installed in the lower groove of the fixing frame 21, the structure and the installation mode are the same as the upper inner magnetizer 22 and the upper inner magnetizer 22, and the difference is that the magnetic field polarization directions of the upper permanent magnet 23 and the lower permanent magnet 25 are opposite.
For example, refer to fig. 6, which is a schematic diagram of the magnetic field polarization directions of the upper permanent magnet and the lower permanent magnet provided in this embodiment. As can be seen from fig. 6, the inner surface of the upper permanent magnet 23 is an N pole, the outer surface is an S pole, the inner surface of the lower permanent magnet 25 is an S pole, and the outer surface is an N pole.
Optionally, the moving-magnet underwater low-frequency sound source emitting device further includes a central magnetic conduction cylinder 16 and a sliding bearing 5;
the central magnetic conduction cylinder 16 is nested inside the dynamic magnetic circuit assembly 7, and one end of the central magnetic conduction cylinder is fixedly connected to the bottom plate 20; the sliding bearing 5 is fixedly connected inside one end of the central magnetic conduction cylinder 16 which is not fixedly connected with the bottom plate 20; the radiation template 4 extends a rod-shaped structure towards the inside of the shell 8, and the rod-shaped structure extends into the sliding bearing 5.
It should be noted that, the bottom plate 20 is connected with the central magnetic conduction cylinder 16 through threads, and in order to ensure the threads and the assembly precision during manufacturing, fine threads are adopted for processing, so that the better the perpendicularity of the surfaces of the central magnetic conduction cylinder 16 and the bottom plate 20 after assembly is, the smaller the probability of occurrence of phenomena such as clamping stagnation and the like during movement of the moving magnetic circuit assembly 7 is. In order to ensure that the air gap magnetic field formed inside the coil is small and the magnetic lines of force are concentrated, the central magnetic conduction cylinder 16 is made of a material with higher magnetic permeability. The sliding bearing 5 is installed at the end part of the central magnetic conduction cylinder 16 through a screw. After the outer magnetic circuit assembly 6 is assembled, the whole outer magnetic circuit assembly is arranged in the shell 8 and sealed through the O-shaped ring 9, and in order to ensure that most magnetic lines of force form a closed loop in the shell, the shell 8 can be made of materials without magnetism or with larger magnetic resistance. And the rod-shaped structure of the radiation template 4 extends into the sliding bearing 5, so that the whole formed by the radiation template 4 and the moving magnetic circuit assembly 7 can keep good axial movement.
Optionally, the moving-magnet underwater low-frequency sound source emitting device further comprises an airbag cover 12 and an airbag module 13, and a through hole is formed in the bottom plate 20;
the airbag cover 12 is mounted on the outer side of the base plate 20;
the air bag module 13 is installed inside the air bag cover 12 for supplementing air to the inside of the housing 8 through the through holes so that the pressure of the inner surface and the outer surface of the radiation template 4 is the same.
It should be noted that, the sound source emitting device of this embodiment is under the action of water pressure when working underwater, therefore, before the sound source emitting device is launched into water, air with a certain pressure can be charged into the air bag module 13 according to the depth of the used water, so that the air inside the air bag is communicated with the internal cavity of the shell 8, and after the sound source emitting device is placed in water, the pressures inside and outside the radiation membrane plate 4 are balanced; the airbag cover 12 is mounted on the outside of the airbag module 13 and is fastened to the base plate 20 by O-ring seals, screws. Optionally, the sound source emitting device of the present embodiment can operate in a depth range of 5-10m underwater.
The working principle of the moving-magnet underwater low-frequency sound source emitting device provided by the embodiment is described as follows:
firstly, a forward voltage signal is conducted to the lower coil 18, a magnetic field with certain intensity and direction is formed in an inner annular space formed by the lower coil 18 under the action of electromagnetic induction, the direction of the magnetic field is assumed to be the same as that of the lower permanent magnet 25, because a part of the structure is made of a material with higher magnetic conductivity, a magnetic induction line vertically penetrates into the lower permanent magnet 25 along the radial direction from the lower cover plate 19, vertically penetrates into the lower inner magnetic conductive iron 24 and radially penetrates into the central magnetic conductive cylinder 16, because the central magnetic conductive cylinder 16 is made of a material with higher magnetic conductivity, after the magnetic line of force enters into the magnetic conductive cylinder 16, the magnetic line of force radially penetrates into the upper inner magnetic conductive iron 22 in another groove in the fixed frame 21, then radially penetrates into the upper permanent magnet 23 above, vertically penetrates into the upper cover plate 14 and radially to the outer magnetic conductive cylinder 17, because the outer magnetic conductive cylinder 17 is made of, will penetrate the lower cover plate 19 axially to the other end and radially, at which time the magnetic lines of force form a closed loop. When the negative voltage signal of the upper coil 15 is applied, a magnetic field having the same strength as that of the lower coil and having the opposite direction to that of the lower coil is formed in the inner annular space formed by the upper coil 15 due to the electromagnetic induction, and the direction of the magnetic field is opposite to that of the lower permanent magnet 25, the closed loop of the magnetic field lines will be distributed along the opposite direction.
For example, refer to fig. 7, which is a schematic diagram illustrating the operation principle of the sound source emitting device when the lower coil is energized with a forward voltage and the upper coil is energized with a reverse voltage. Assuming that when the lower coil is energized with forward voltage, the left end of the lower coil is an N pole, and the right end of the lower coil is an S pole, and when the upper coil is energized with reverse voltage, the left side of the upper coil is an S pole, and the right side of the upper coil is an N pole, the outer magnetic conduction cylinder 17 is influenced by magnetization of the two coils, and the annular partition plate is an N pole; in the embodiment, the inner surface of the upper permanent magnet 23 is an N pole, the outer surface is an S pole, the inner surface of the lower permanent magnet 25 is an S pole, and the outer surface is an N pole, so that the N pole of the annular partition plate attracts the upper permanent magnet 23 and repels the lower permanent magnet 25, thereby driving the moving magnetic circuit assembly 6 to move linearly in the right axial direction.
Similarly, referring to fig. 8, the schematic diagram is a schematic diagram of the operation principle of the sound source emitting device when the reverse voltage is applied to the lower coil and the forward voltage is applied to the upper coil. At this time, the outer magnetic conducting cylinder 17 is influenced by the magnetization of the two coils, the annular partition plate is an S pole, and the S pole of the annular partition plate repels the upper permanent magnet 23 and attracts the lower permanent magnet 25, so as to drive the moving magnetic circuit assembly 6 to move linearly in the left axial direction.
Therefore, when the two coils are alternately electrified, the moving magnetic circuit component 7 reciprocates inside to drive the radiation diaphragm 4 to vibrate outwards to radiate a sound field. When the alternating signal of the coil is a sinusoidal, random or pulse signal, the moving magnetic circuit assembly 7 will also internally generate a corresponding sinusoidal, random or pulse motion, which is an acoustic signal in response to the radiation diaphragm 4.
Referring to fig. 9 and 10, the operation principle of the sound source emitting device is schematically illustrated when only one of the upper coil and the lower coil provided in the present embodiment is energized. As can be seen from fig. 9 and 10, the principle that the single coil is energized and the two coils are energized simultaneously to drive the moving magnetic circuit assembly 6 to perform the axial linear motion is the same, and the details of this embodiment are not repeated.
Therefore, in the moving magnetic underwater low-frequency sound source emitting device provided by the embodiment, when the moving magnetic underwater low-frequency sound source emitting device works, a shore-based controller transmits a voltage signal with a certain amplitude to the electric control connector 10, the voltage signal drives the upper coil 15 and the lower coil 18 to alternately generate solenoid electromagnetic fields with the same strength and opposite directions in the inner part, the generated electromagnetic force is mutually coupled with the permanent magnets embedded in the inner part, namely the electromagnetic force is mutually interacted with the upper permanent magnet 23 and the lower permanent magnet 25 on the inner moving magnetic path part 7, and the electromagnetic force drives the moving magnetic path part 7 to be close to the center position of the electromagnetic field generated by the upper coil 15 or the lower coil 18; when the control electric signal is alternating current, the generated electromagnetic force is also alternating change, so that the internal moving magnetic circuit component 7 can reciprocate at the center position of the electromagnetic field generated by the coil 15 or the lower coil 18 under the action of the alternating electromagnetic force, thereby driving the radiation diaphragm 4 to radiate the sound field to the water.
The type of the generated alternating electromagnetic force is changed according to the type of the voltage signal applied to the upper coil 15 and the lower coil 18, and the type of the relative motion generated by the internal moving magnetic path part 7 under the action of the electromagnetic force and the type of the radiated sound field signal are also corresponding to the type of the generated alternating electromagnetic force, for example, the voltage signal may be a sinusoidal signal, a random signal, a pulse signal, or the like.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it will be understood by those skilled in the art that various changes and modifications may be made herein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A moving magnetic underwater low-frequency sound source emitting device is characterized by comprising a rolling sealing ring assembly (2), a radiation diaphragm plate (4), an outer magnetic circuit assembly (6), a moving magnetic circuit assembly (7), a shell (8) and an electric control joint (10);
the shell (8) is a hollow cylinder; the rolling seal ring assembly (2) is arranged on the periphery of the radiation diaphragm (4) and then integrally arranged with the radiation diaphragm (4) at any end of the shell (8), so that the rolling seal ring assembly (2) is used for providing axial displacement for the radiation diaphragm (4);
the outer magnetic circuit assembly (6) is installed inside the shell (8), the moving magnetic circuit assembly (7) is nested inside the outer magnetic circuit assembly (6), meanwhile, the outer magnetic circuit assembly (6) is fixedly connected with one end, not provided with the rolling seal ring assembly (2), of the shell (8), and the moving magnetic circuit assembly (7) is fixedly connected with the radiation diaphragm plate (4);
the electric control joint (10) is arranged on the external magnetic circuit assembly (6) and is used for accessing an alternating voltage signal to the external magnetic circuit assembly (6) so that the external magnetic circuit assembly (6) generates an alternating magnetic field; the alternating magnetic field acts on the constant magnetic field generated by the moving magnetic circuit component (7), so that the moving magnetic circuit component (7) linearly moves along the axial direction of the moving magnetic circuit component, and further pushes the radiation diaphragm plate (4) to vibrate back and forth to radiate a sound field to the outside.
2. Moving magnet underwater low frequency sound source emitting device according to claim 1, characterised in that said outer magnetic circuit assembly (6) comprises an upper cover plate (14), an upper coil (15), an outer magnetic cylinder (17), a lower coil (18), a lower cover plate (19) and a bottom plate (20);
the outer magnetic conduction cylinder (17) is of a hollow cylindrical structure, and the middle part of the outer magnetic conduction cylinder extends along the radial direction to form an annular partition plate;
the upper cover plate (14) and the lower cover plate (19) are both annular panels and are respectively installed at two ends of the outer magnetic conduction cylinder (17), so that the upper coil (15) and the lower coil (18) are respectively packaged inside the outer magnetic conduction cylinder (17); wherein the upper coil (15) and the lower coil (18) are completely the same and are respectively arranged on two sides of the annular partition plate;
the bottom plate (20) is arranged on the other surface of the lower cover plate (19) which is not contacted with the outer magnetic conduction cylinder (17) and is used for integrally packaging the upper cover plate (14), the upper coil (15), the outer magnetic conduction cylinder (17), the lower coil (18) and the lower cover plate (19) in the shell (8); wherein, still open the mounting hole on bottom plate (20), automatically controlled joint (10) set up in the mounting hole, be coil (15) and lower coil (18) access alternating voltage signal respectively, wherein, when automatically controlled joint (10) is coil (15) and lower coil (18) access alternating voltage signal simultaneously, the voltage signal size of coil (15) and lower coil (18) is the same, the opposite direction.
3. A moving-magnet underwater low-frequency sound source emitting device as claimed in claim 2, wherein the upper cover plate (14), the outer magnetic conducting cylinder (17) and the lower cover plate (19) are all provided with more than two through slots with the same width along the radial direction, and the through slots on the upper cover plate (14), the outer magnetic conducting cylinder (17) and the lower cover plate (19) are aligned with each other.
4. The moving-magnet underwater low-frequency sound source emission device as claimed in claim 3, wherein said through slots comprise inner circumferential through slots and outer circumferential through slots, and the inner circumferential through slots and the outer circumferential through slots are alternately distributed; wherein, the inner circumference through groove starts from the inner circumference of the upper cover plate (14), the outer magnetic conduction cylinder (17) and the lower cover plate (19) and extends in the radial direction; the outer circumferential through groove starts from the outer circumferences of the upper cover plate (14), the outer magnetic conduction cylinder (17) and the lower cover plate (19) and extends in the radial direction.
5. A moving-magnet underwater low-frequency sound source emitting device according to claim 1, further comprising an outer pressing plate (1) and an inner pressing plate (3);
the rolling seal ring assembly (2) is of an annular structure, and installation edges respectively extend outwards and inwards from the annular structure; the inner pressing plate (3) fixes the mounting edge inside the rolling seal ring assembly (2) on the circumference of the radiation diaphragm plate (4), and meanwhile, the outer pressing plate (1) fixes the mounting edge outside the rolling seal ring assembly (2) on the circumference of any end of the shell (8).
6. Moving magnet type underwater low frequency sound source emitting device according to claim 1, characterized in that said moving magnetic circuit assembly (7) comprises a fixed frame (21), an upper inner magnet (22), an upper permanent magnet (23), a lower inner magnet (24) and a lower permanent magnet (25);
the fixing frame (21) is a hollow cylinder, and two annular grooves are formed in the outer surface of the cylinder;
the upper inner magnetic conductive iron (22) and the lower inner magnetic conductive iron (24) are respectively arranged in the two grooves, meanwhile, the upper permanent magnet (23) is arranged above the upper inner magnetic conductive iron (22), and the lower permanent magnet (25) is arranged above the lower inner magnetic conductive iron (24);
the directions of the generated constant magnetic fields of the upper permanent magnet (23) and the lower permanent magnet (25) are opposite.
7. A moving-magnet underwater low-frequency sound source emitting device as claimed in claim 6, wherein said upper inner magnet (22) and lower inner magnet (24) are each formed by two magnets of semicircular configuration; the upper permanent magnet (23) and the lower permanent magnet (25) are formed by four magnets of 1/4 circular structures, and the polarization directions of the upper permanent magnet (23) and the lower permanent magnet (25) are along the diameter direction.
8. A moving-magnet underwater low-frequency sound source emitting device according to claim 2, further comprising a central magnetically conductive cylinder (16);
the central magnetic conduction cylinder (16) is nested inside the moving magnetic circuit assembly (7), and one end of the central magnetic conduction cylinder is fixedly connected to the bottom plate (20).
9. Moving magnet underwater low frequency sound source emitting device according to claim 8, characterised in that it further comprises sliding bearings (5);
the sliding bearing (5) is fixedly connected inside one end of the central magnetic conduction cylinder (16) which is not fixedly connected with the bottom plate (20);
the radiation diaphragm plate (4) extends to the inside of the shell (8) to form a rod-shaped structure, and the rod-shaped structure extends into the sliding bearing (5).
10. A moving-magnet underwater low-frequency sound source emitting device as claimed in claim 2, further comprising an airbag cover (12) and an airbag module (13), and the bottom plate (20) is provided with a through hole;
the airbag cover (12) is arranged on the outer side of the bottom plate (20);
the air bag assembly (13) is arranged in the air bag cover (12) and is used for supplementing air to the inside of the shell (8) through the through hole, so that the pressure of the inner surface and the outer surface of the radiation diaphragm plate (4) is the same.
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| CN201811599143.3A CN109647685B (en) | 2018-12-26 | 2018-12-26 | Moving-magnetic underwater low-frequency sound source emitting device |
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| CN112464379B (en) * | 2020-11-26 | 2022-09-02 | 中国船舶重工集团有限公司第七一0研究所 | Sound source system for simulating underwater propeller noise |
| CN115961945A (en) * | 2022-11-21 | 2023-04-14 | 中国船舶重工集团公司第七一五研究所 | Method and device for realizing low-frequency acoustic signal for petroleum logging |
| CN115788416A (en) * | 2022-11-21 | 2023-03-14 | 中国船舶重工集团公司第七一五研究所 | Low-frequency electromagnetic vibration sound source applied to petroleum logging |
| CN115629372B (en) * | 2022-12-08 | 2023-03-21 | 武汉中科海讯电子科技有限公司 | Very low frequency underwater fixed sound source |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0789040B2 (en) * | 1987-10-22 | 1995-09-27 | 日立造船株式会社 | Stationary torpedo |
| GB2525755A (en) * | 2014-04-10 | 2015-11-04 | Furuno Electric Co | Ultrasonic wave transmitter and underwater detection apparatus |
| CN106714051A (en) * | 2017-03-18 | 2017-05-24 | 歌尔股份有限公司 | Moving-magnet type loudspeaker |
| CN106792402A (en) * | 2017-03-18 | 2017-05-31 | 歌尔股份有限公司 | Moving-magnetic type loudspeaker |
| CN107127134A (en) * | 2017-05-17 | 2017-09-05 | 西安思坦测控技术有限公司 | Magnetostrictive transducer and the high-power ultralow frequency sound source for underwater emission |
-
2018
- 2018-12-26 CN CN201811599143.3A patent/CN109647685B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0789040B2 (en) * | 1987-10-22 | 1995-09-27 | 日立造船株式会社 | Stationary torpedo |
| GB2525755A (en) * | 2014-04-10 | 2015-11-04 | Furuno Electric Co | Ultrasonic wave transmitter and underwater detection apparatus |
| CN106714051A (en) * | 2017-03-18 | 2017-05-24 | 歌尔股份有限公司 | Moving-magnet type loudspeaker |
| CN106792402A (en) * | 2017-03-18 | 2017-05-31 | 歌尔股份有限公司 | Moving-magnetic type loudspeaker |
| CN107127134A (en) * | 2017-05-17 | 2017-09-05 | 西安思坦测控技术有限公司 | Magnetostrictive transducer and the high-power ultralow frequency sound source for underwater emission |
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