A frequency equalization based underwater acoustic transmitter

Abstract

The application discloses a kind of frequency equalization-based underwater acoustic transmitter, belong to the technical field of sonar equipment, the reaction device of this production thickening agent, including support frame, the surface of the support frame is fixedly installed with transmitter main body, the inside electrical connection of the transmitter main body has wire, the other end electrical connection of the wire has transducer, the inside fixed mounting of the support frame has drive mechanism, the transmitter main body includes lower shell and upper shell, the inside fixed mounting of the transmitter main body has docking mechanism, the docking mechanism is used for the butt joint of lower shell and upper shell, the surface of the lower shell is fixedly installed with waterproof mechanism and heat dissipation mechanism, upper shell and lower shell can be realized disassembly, it is convenient to overhaul transmitter main body inside, drive mechanism can drive transducer in water depth adjustment, improve the applicability of device, waterproof board can be rotated to be inclined, to play the role of waterproof, improve the service life of transmitter main body.

Description

Technical Field

[0001] This invention belongs to the field of sonar equipment technology, specifically relating to a frequency equalization-based underwater acoustic transmitter. Background Technology

[0002] An underwater acoustic positioning system is a measuring device capable of real-time positioning of moving targets underwater. It can be applied in fields such as marine fishery resource exploration, precision salvage of wrecked ships and aircraft, and underwater weapon testing. The underwater acoustic transmitter is a key component of an active underwater acoustic positioning system; it radiates sound waves in the water, thereby transmitting information.

[0003] Currently, the bottleneck restricting the performance of underwater acoustic transmitters is the need for high-power and wide-bandwidth signal transmission. High-power underwater acoustic transmitters enable systems to operate at greater distances and with wider detection ranges. However, signals in underwater acoustic communication typically employ modulation methods such as differential phase-shift keying, orthogonal frequency division multiplexing (OFDM), and orthogonal amplitude modulation (AEM). The bandwidth of underwater acoustic communication systems is constantly increasing with system complexity. The most common piezoelectric ceramic underwater acoustic transducer is a capacitive load, exhibiting uneven frequency response and inconsistent transmission response, thus posing challenges to the effective transmission of broadband underwater acoustic signals. While load matching networks can improve the uniformity of the piezoelectric ceramic transducer's transmission response and increase energy conversion efficiency, fluctuations in the transmission response still occur throughout the entire operating bandwidth. Furthermore, existing devices are inconvenient for adjusting the transmitter's depth underwater, significantly reducing their practicality. The underwater acoustic transmitter itself also suffers from poor waterproofing and heat dissipation, affecting its usability.

[0004] Therefore, there is an urgent need to provide a frequency-equalized underwater acoustic transmitter to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a frequency equalization-based underwater acoustic transmitter.

[0006] The technical solution adopted to solve the above technical problems is: to provide a frequency equalization-based underwater acoustic transmitter, including a support frame, on the surface of the support frame a transmitter body is fixedly mounted, the transmitter body is electrically connected to a wire, the other end of the wire is electrically connected to a transducer, the transducer is used to convert the electrical signal of the transmitter body into mechanical vibration and generate sound waves to radiate into the water, and also includes;

[0007] The support frame is internally fixedly equipped with a drive mechanism, which is used to drive the transducer to rise and fall and adjust the depth inside the water. The transmitter body includes a lower shell and an upper shell. The transmitter body is internally fixedly equipped with a docking mechanism, which is used to dock the lower shell and the upper shell.

[0008] A waterproof mechanism and a heat dissipation mechanism are fixedly installed on the surface of the lower housing. The waterproof mechanism is used to waterproof the inside of the transmitter body, and the heat dissipation mechanism is used to dissipate heat inside the transmitter body.

[0009] The present invention is further configured such that: a ground plate is fixedly installed at one end of the support frame, and a plurality of fastening bolts are threadedly connected to the surface of the ground plate; and a sliding groove is provided on one side of the support frame.

[0010] The above technical solution provides support for the transmitter body and transducer. The support frame can be fixed to the ship or shore for positioning by tightening bolts.

[0011] The present invention is further configured such that: a main controller, a power amplifier, a matching circuit, and a power module are fixedly installed inside the lower housing; the output terminal of the main controller is electrically connected to the input terminals of the power amplifier, the matching circuit, and the power module; the output terminal of the main controller is electrically connected to the input terminal of the transducer via a wire; the output terminal of the power amplifier is electrically connected to the input terminal of the matching circuit; and the output terminal of the power module is electrically connected to the input terminals of the power amplifier and the matching circuit.

[0012] Through the above technical solution, the main controller is a signal generation circuit, which is mainly responsible for generating the coded pulse signal required for underwater acoustic communication. The power amplifier is used to amplify the input low-power electrical signal to drive the transducer to generate sufficiently strong sound waves. The matching circuit is connected between the power amplifier and the transducer. Its main function is to achieve impedance matching, so that the power amplifier can efficiently transfer energy to the transducer, while reducing reflection loss and improving the working efficiency of the entire system. The power supply module provides a stable power supply to all parts of the transmitter.

[0013] The present invention is further configured such that: the upper surface of the lower housing is provided with a plurality of docking holes, the surface of the lower housing is provided with a plurality of side grooves, and one side of the lower housing is provided with a plurality of heat dissipation holes.

[0014] Through the above technical solution, the docking hole and the docking rod make the lower shell and the upper shell dock together, the side groove is used for the waterproof mechanism, and the heat dissipation hole is used for heat dissipation inside the transmitter body.

[0015] The present invention is further configured such that: a plurality of docking rods are fixedly connected to the lower surface of the upper housing, the docking rods are movably inserted into the docking holes, the surface of the docking rods is provided with positioning holes, the inner wall of the upper housing is provided with an inner groove, the interior of the upper housing is provided with a positioning groove, and a rack is fixedly installed inside the inner groove.

[0016] The above technical solution covers the surface of the lower shell to form the transmitter body. The positioning hole and the positioning rod cooperate to make the connection between the upper shell and the lower shell more stable. The inner groove provides space for the rotation of the waterproof plate, and the positioning groove provides space for the movement of the positioning rod and the positioning ring.

[0017] The present invention is further configured such that: a screw sleeve is fixedly installed at one end of the transducer, and the screw sleeve is slidably connected inside the slide groove.

[0018] Through the above technical solution, the transducer is the core component of the underwater acoustic transmitter, responsible for converting electrical signals into mechanical vibrations and generating sound waves that radiate into the water.

[0019] The present invention is further configured such that: the driving mechanism includes a driving motor, the output end of the driving motor is connected to a screw, the screw is rotatably connected inside a sliding groove, and the screw sleeve is threadedly connected to the surface of the screw.

[0020] The above technical solution enables the drive motor to be started, the screw to rotate, and the transducer to adjust its depth at the bottom of the water. The sliding groove and the screw sleeve make the transducer more stable when it moves down.

[0021] The present invention is further configured such that: the docking mechanism includes a pull plate, symmetrical positioning rods are fixedly installed on the surface of the pull plate, positioning rings are fixedly installed on the surface of the positioning rods, the positioning rods and positioning rings are slidably connected inside the positioning groove, a spring is fixedly connected between the surface of the positioning ring and the inner wall of the positioning groove, and the positioning rods are movably inserted into the positioning hole.

[0022] Using the above technical solution, when docking the upper and lower housings, the pull plate is pulled outwards. At this time, the positioning rod moves out of the docking hole, and the positioning ring squeezes the spring. The spring is in a compressed state. When the docking rod is inserted into the docking hole, the pull plate is released, the spring rebounds, and the positioning rod is inserted into the positioning hole to fix the docking rod. This further fixes the upper housing, making the upper and lower housings a whole. During maintenance, simply pull the pull plate outwards again, the docking rod moves out of the docking hole, and the transmitter body opens for easy maintenance.

[0023] The present invention is further configured such that: the waterproof mechanism includes a gear, the gear meshes with a rack, a rotating shaft is fixedly connected inside the gear, both ends of the rotating shaft are rotatably connected to the inner wall of the side groove, a waterproof plate is fixedly installed on the surface of the rotating shaft, and the waterproof plate is rotatably connected to the inside of the side groove and the inner groove.

[0024] With the above technical solution, as the upper shell covers the surface of the lower shell, the rack moves down. Through the meshing of the rack and the gear, the gear rotates, which in turn drives the rotating shaft and the waterproof plate on the surface of the rotating shaft to rotate. This allows the waterproof plate to rotate to an incline and move into the inner groove, thereby achieving the waterproofing function.

[0025] The present invention is further configured such that: the heat dissipation mechanism includes a heat dissipation motor and two fans, a first sprocket is fixedly installed at the end of the drive shaft of the heat dissipation motor, a fan shaft is fixedly connected inside the fan, a second sprocket is fixedly installed at the end of the fan shaft, and a chain is engaged between the surfaces of the two second sprockets and the first sprocket.

[0026] With the above technical solution, when heat dissipation is required, the heat dissipation motor is started, the first sprocket rotates, and through the meshing of the first sprocket, the second sprocket and the chain, the two fan shafts rotate, which in turn drives the two fans to rotate, thus carrying out heat dissipation work inside the transmitter body.

[0027] The beneficial effects of this invention are as follows:

[0028] 1. The present invention is provided with an upper shell and a lower shell, which can be disassembled and assembled to facilitate the internal maintenance of the transmitter body. It is provided with a drive mechanism to drive the transducer to adjust the depth in water, thereby improving the applicability of the device.

[0029] 2. The present invention is equipped with a waterproof mechanism. During the process of the upper shell covering the surface of the lower shell, the rack moves down. Through the meshing of the rack and the gear, the gear rotates, which further allows the waterproof plate to rotate to an inclined position and move into the inner groove, thereby playing a waterproof role and improving the service life of the transmitter body.

[0030] 3. The present invention is equipped with a heat dissipation mechanism, and two fans can rotate simultaneously. During operation, the heat inside the transmitter body is drawn out from the heat dissipation holes, which improves the heat dissipation effect inside the transmitter body. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0032] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0033] Figure 3 This is a schematic diagram of the lower shell structure of the present invention;

[0034] Figure 4 This is a schematic diagram of the cross-sectional structure of the upper shell of the present invention;

[0035] Figure 5 This is a schematic diagram of the internal structure of the lower housing of the present invention;

[0036] Figure 6 This is a schematic diagram of the waterproof mechanism structure of the present invention;

[0037] Figure 7 This is a schematic diagram of the heat dissipation mechanism of the present invention;

[0038] Figure 8 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0039] Reference numerals: 1. Support frame; 11. Grounding plate; 12. Fastening bolt; 13. Slide groove; 2. Transmitter body; 21. Lower housing; 211. Main controller; 212. Power amplifier; 213. Matching circuit; 214. Power module; 22. Upper housing; 23. Docking hole; 24. Side groove; 25. Heat dissipation hole; 26. Docking rod; 27. Positioning hole; 28. Inner groove; 29. ​​Positioning groove; 201. Rack; 3 1. Wire; 4. Transducer; 41. Screw sleeve; 5. Drive mechanism; 51. Drive motor; 52. Screw; 6. Docking mechanism; 61. Pull plate; 62. Positioning rod; 63. Positioning ring; 64. Spring; 7. Waterproofing mechanism; 71. Gear; 72. Shaft; 73. Waterproof plate; 8. Heat dissipation mechanism; 81. Heat dissipation motor; 82. Fan; 83. First sprocket; 84. Fan shaft; 85. Second sprocket; 86. Chain. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0041] Please see Figures 1-8 This application provides a frequency equalization-based underwater acoustic transmitter, including a support frame 1, a transmitter body 2 fixedly mounted on the surface of the support frame 1, an electrical wire 3 electrically connected inside the transmitter body 2, and a transducer 4 electrically connected to the other end of the electrical wire 3. The transducer 4 is used to convert the electrical signal of the transmitter body 2 into mechanical vibration and generate sound waves that radiate into the water.

[0042] like Figure 2 and Figure 4 As shown, a ground plate 11 is fixedly installed at one end of the support frame 1. Multiple fastening bolts 12 are threaded onto the surface of the ground plate 11. A sliding groove 13 is provided on one side of the support frame 1.

[0043] In this embodiment, the support frame 1 supports the transmitter body 2 and the transducer 4, and the support frame 1 can be fixed to the hull or shore for positioning by fastening bolts 12.

[0044] like Figure 2 and Figure 5As shown, a main controller 211, a power amplifier 212, a matching circuit 213, and a power module 214 are fixedly installed inside the lower housing 21. The output terminal of the main controller 211 is electrically connected to the input terminals of the power amplifier 212, the matching circuit 213, and the power module 214. The output terminal of the main controller 211 is electrically connected to the input terminal of the transducer 4 through the wire 3. The output terminal of the power amplifier 212 is electrically connected to the input terminal of the matching circuit 213. The output terminal of the power module 214 is electrically connected to the input terminals of the power amplifier 212 and the matching circuit 213.

[0045] In this embodiment, the main controller 211 is a signal generation circuit, mainly responsible for generating the coded pulse signal required for underwater acoustic communication. The power amplifier 212 is used to amplify the input low-power electrical signal to drive the transducer 4 to generate sufficiently strong sound waves. The matching circuit 213 is connected between the power amplifier 212 and the transducer 4. Its main function is to achieve impedance matching, so that the power amplifier 212 can efficiently transfer energy to the transducer 4, while reducing reflection loss and improving the working efficiency of the entire system. The power module 214 provides a stable power supply to all parts of the transmitter body 2.

[0046] like Figure 2 and Figure 3 As shown, the upper surface of the lower housing 21 has multiple docking holes 23, the surface of the lower housing 21 has multiple side grooves 24, and one side of the lower housing 21 has multiple heat dissipation holes 25.

[0047] In this embodiment, the docking hole 23, in conjunction with the docking rod 26, enables the lower housing 21 and the upper housing 22 to dock together. The side groove 24 is used for the waterproof mechanism 7, and the heat dissipation hole 25 is used for heat dissipation inside the transmitter body 2.

[0048] like Figure 3 , Figure 4 and Figure 8 As shown, a plurality of docking rods 26 are fixedly connected to the lower surface of the upper housing 22. The docking rods 26 are movably inserted into the docking holes 23. The surface of the docking rods 26 is provided with positioning holes 27. The inner wall of the upper housing 22 is provided with an inner groove 28. The interior of the upper housing 22 is provided with a positioning groove 29. A rack 201 is fixedly installed inside the inner groove 28.

[0049] In this embodiment, the upper housing 22 is covered on the surface of the lower housing 21 to form the transmitter body 2. The positioning hole 27 cooperates with the positioning rod 62 to make the connection between the upper housing 22 and the lower housing 21 more stable. The inner groove 28 provides space for the rotation of the waterproof plate 73, and the positioning groove 29 provides space for the movement of the positioning rod 62 and the positioning ring 63.

[0050] like Figure 2As shown, a screw sleeve 41 is fixedly installed at one end of the transducer 4, and the screw sleeve 41 is slidably connected inside the slide groove 13.

[0051] In this embodiment, the transducer 4 is the core component of the underwater acoustic transmitter, responsible for converting electrical signals into mechanical vibrations and generating sound waves that radiate into the water.

[0052] The support frame 1 is internally fixedly equipped with a drive mechanism 5, which is used to drive the transducer 4 to rise and fall and adjust the depth inside the water. The transmitter body 2 includes a lower shell 21 and an upper shell 22. The transmitter body 2 is internally fixedly equipped with a docking mechanism 6, which is used to dock the lower shell 21 and the upper shell 22.

[0053] like Figure 1 and Figure 2 As shown, the drive mechanism 5 includes a drive motor 51, and the output end of the drive motor 51 is connected to a screw 52. The screw 52 is rotatably connected inside the slide groove 13, and the screw sleeve 41 is threadedly connected to the surface of the screw 52.

[0054] In this embodiment, the drive motor 51 is started and the screw 52 rotates, so that the transducer 4 can be adjusted in depth at the bottom of the water. The sliding groove 13 cooperates with the screw sleeve 41 to make the transducer 4 more stable when it moves down.

[0055] like Figure 4 and Figure 8 As shown, the docking mechanism 6 includes a pull plate 61, and symmetrical positioning rods 62 are fixedly installed on the surface of the pull plate 61. Positioning rings 63 are fixedly installed on the surface of the positioning rods 62. The positioning rods 62 and the positioning rings 63 are slidably connected inside the positioning groove 29. A spring 64 is fixedly connected between the surface of the positioning rings 63 and the inner wall of the positioning groove 29. The positioning rods 62 are movably inserted into the positioning hole 27.

[0056] In this embodiment, when the upper housing 22 is connected to the lower housing 21, the pull plate 61 is pulled outward. At this time, the positioning rod 62 moves out of the docking hole 23, and the positioning ring 63 compresses the spring 64. The spring 64 is in a compressed state. When the docking rod 26 is inserted into the docking hole 23, the pull plate 61 is released, the spring 64 rebounds, and the positioning rod 62 is inserted into the positioning hole 27 to fix the docking rod 26. This further fixes the upper housing 22, making the upper housing 22 and the lower housing 21 form a whole. During maintenance, the pull plate 61 is simply pulled outward again, the docking rod 26 moves out of the docking hole 23, and the transmitter body 2 is opened for easy maintenance.

[0057] A waterproof mechanism 7 and a heat dissipation mechanism 8 are fixedly installed on the surface of the lower housing 21. The waterproof mechanism 7 is used to waterproof the inside of the transmitter body 2, and the heat dissipation mechanism 8 is used to dissipate heat inside the transmitter body 2.

[0058] like Figure 2 and Figure 6 As shown, the waterproof mechanism 7 includes a gear 71, which meshes with a rack 201. A rotating shaft 72 is fixedly connected inside the gear 71. Both ends of the rotating shaft 72 are rotatably connected to the inner wall of the side groove 24. A waterproof plate 73 is fixedly installed on the surface of the rotating shaft 72. The waterproof plate 73 is rotatably connected to the side groove 24 and the inner groove 28.

[0059] In this embodiment, as the upper housing 22 covers the surface of the lower housing 21, the rack 201 moves downward. Through the meshing of the rack 201 and the gear 71, the gear 71 rotates, which in turn drives the rotating shaft 72 and the waterproof plate 73 on the surface of the rotating shaft 72 to rotate, so that the waterproof plate 73 can rotate to an inclined position and move into the inner groove 28, thereby achieving the waterproof function.

[0060] like Figure 5 and Figure 7 As shown, the heat dissipation mechanism 8 includes a heat dissipation motor 81 and two fans 82. A first sprocket 83 is fixedly installed at the end of the drive shaft of the heat dissipation motor 81. A fan shaft 84 is fixedly connected inside the fan 82. A second sprocket 85 is fixedly installed at the end of the fan shaft 84. A chain 86 meshes between the two second sprockets 85 and the surface of the first sprocket 83.

[0061] In this embodiment, when heat dissipation is required, the heat dissipation motor 81 is started, the first sprocket 83 rotates, and through the meshing of the first sprocket 83, the second sprocket 85 and the chain 86, the two fan shafts 84 rotate, which in turn drives the two fans 82 to rotate, so as to carry out heat dissipation work inside the transmitter body 2.

[0062] The working principle of this embodiment is as follows: First, the support frame 1 can be fixed to the hull or shore by tightening the bolts 12. Then, the drive motor 51 is started, and the screw 52 rotates, allowing the transducer 4 to adjust its depth underwater and perform real-time positioning measurements of the moving target. When it is necessary to assemble the upper shell 22 with the lower shell 21, the pull plate 61 is pulled outwards. At this time, the positioning rod 62 moves out of the docking hole 23, and the positioning ring 63 compresses the spring 64, which is in a compressed state. When the docking rod 26 is inserted into the docking hole 23, the pull plate 61 is released, and the spring 64 rebounds, allowing the positioning rod 62 to be inserted into the positioning hole 27, thus fixing the docking rod 26. This further fixes the upper shell 22, making the upper shell 22 and the lower shell 21 form a complete structure. During maintenance, simply pull the pull plate 61 outward again, and the docking rod 26 will move out of the docking hole 23, opening the transmitter body 2 for easy maintenance. As the upper housing 22 covers the surface of the lower housing 21, the rack 201 moves downward. Through the meshing of the rack 201 and the gear 71, the gear 71 rotates, further driving the rotating shaft 72 and the waterproof plate 73 on the surface of the rotating shaft 72 to rotate, allowing the waterproof plate 73 to rotate to an inclined position and move into the inner groove 28. When heat dissipation is required, the heat dissipation motor 81 is started, and the first sprocket 83 rotates. Through the meshing of the first sprocket 83, the second sprocket 85 and the chain 86, the two fan shafts 84 rotate, further driving the two fans 82 to rotate, performing heat dissipation work inside the transmitter body 2.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A frequency equalized underwater acoustic transmitter comprising a support frame (1), characterized in that, The surface of the support frame (1) is fixedly mounted with a transmitter body (2), and the transmitter body (2) is electrically connected to a wire (3). The other end of the wire (3) is electrically connected to a transducer (4). The transducer (4) is used to convert the electrical signal of the transmitter body (2) into mechanical vibration and generate sound waves to radiate into the water. It also includes: The support frame (1) is fixedly installed with a drive mechanism (5), which is used to drive the transducer (4) to rise and fall and adjust the depth inside the water. The transmitter body (2) includes a lower shell (21) and an upper shell (22). The transmitter body (2) is fixedly installed with a docking mechanism (6), which is used to dock the lower shell (21) and the upper shell (22). A waterproof mechanism (7) and a heat dissipation mechanism (8) are fixedly installed on the surface of the lower housing (21). The waterproof mechanism (7) is used to waterproof the inside of the transmitter body (2), and the heat dissipation mechanism (8) is used to dissipate heat inside the transmitter body (2).

2. The underwater acoustic transmitter based on frequency equalization according to claim 1, characterized in that, One end of the support frame (1) is fixedly installed with a ground plate (11), and the surface of the ground plate (11) is threaded with multiple fastening bolts (12). A sliding groove (13) is provided on one side of the support frame (1).

3. The underwater acoustic transmitter based on frequency equalization according to claim 1, characterized in that, The lower housing (21) is fixedly installed with a main controller (211), a power amplifier (212), a matching circuit (213), and a power module (214). The output terminal of the main controller (211) is electrically connected to the input terminals of the power amplifier (212), the matching circuit (213), and the power module (214). The output terminal of the main controller (211) is electrically connected to the input terminal of the transducer (4) through a wire (3). The output terminal of the power amplifier (212) is electrically connected to the input terminal of the matching circuit (213). The output terminal of the power module (214) is electrically connected to the input terminals of the power amplifier (212) and the matching circuit (213).

4. A frequency-equalized underwater acoustic transmitter according to claim 3, characterized in that, The upper surface of the lower housing (21) is provided with multiple docking holes (23), the surface of the lower housing (21) is provided with multiple side grooves (24), and one side of the lower housing (21) is provided with multiple heat dissipation holes (25).

5. A frequency-equalized underwater acoustic transmitter according to claim 4, characterized in that, Multiple docking rods (26) are fixedly connected to the lower surface of the upper housing (22). The docking rods (26) are movably inserted into the docking holes (23). The surface of the docking rods (26) is provided with positioning holes (27). The inner wall of the upper housing (22) is provided with an inner groove (28). The interior of the upper housing (22) is provided with a positioning groove (29). A rack (201) is fixedly installed inside the inner groove (28).

6. A frequency-equalized underwater acoustic transmitter according to claim 2, characterized in that, One end of the transducer (4) is fixedly installed with a screw sleeve (41), which is slidably connected inside the groove (13).

7. A frequency-equalized underwater acoustic transmitter according to claim 6, characterized in that, The drive mechanism (5) includes a drive motor (51), the output end of which is connected to a screw (52), the screw (52) is rotatably connected inside the slide groove (13), and the screw sleeve (41) is threadedly connected to the surface of the screw (52).

8. A frequency-equalized underwater acoustic transmitter according to claim 5, characterized in that, The docking mechanism (6) includes a pull plate (61), on the surface of the pull plate (61) are fixedly mounted symmetrical positioning rods (62), on the surface of the positioning rods (62) are fixedly mounted positioning rings (63), the positioning rods (62) and the positioning rings (63) are slidably connected inside the positioning groove (29), and a spring (64) is fixedly connected between the surface of the positioning rings (63) and the inner wall of the positioning groove (29), and the positioning rods (62) are movably inserted into the positioning hole (27).

9. A frequency-equalized underwater acoustic transmitter according to claim 5, characterized in that, The waterproof mechanism (7) includes a gear (71) that meshes with a rack (201). A rotating shaft (72) is fixedly connected inside the gear (71). Both ends of the rotating shaft (72) are rotatably connected to the inner wall of the side groove (24). A waterproof plate (73) is fixedly installed on the surface of the rotating shaft (72). The waterproof plate (73) is rotatably connected to the side groove (24) and the inner groove (28).

10. A frequency-equalized underwater acoustic transmitter according to claim 1, characterized in that, The heat dissipation mechanism (8) includes a heat dissipation motor (81) and two fans (82). A first sprocket (83) is fixedly installed at the end of the drive shaft of the heat dissipation motor (81). A fan shaft (84) is fixedly connected inside the fan (82). A second sprocket (85) is fixedly installed at the end of the fan shaft (84). A chain (86) meshes with the surfaces of the two second sprockets (85) and the first sprocket (83).

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