Clamping device, underwater acoustic transducer testing system and testing method

Abstract

The embodiments of the present invention disclose a clamping device, an underwater acoustic transducer testing system and a testing method. The clamping device includes: a frame, a fixed flange, a first bracket, a second bracket and an adjustable clamping assembly; one end of the fixed flange is fixed to the top of the frame, and the other end passes through the top of the frame to connect with the first bracket and the second bracket, and the first bracket and the second bracket are detachably connected to the opposite sides of the fixed flange through a limiting ring hoop; there are multiple adjustable clamping assemblies, which are respectively sleeved on the first bracket and the second bracket, and the adjustable clamping assembly is provided with an adjustable clamping hole for clamping. The present invention can realize the horizontal and vertical position adjustment of the object to be clamped, and the adjustment method is simple, which saves manpower and improves work efficiency.

Description

Technical Field

[0001] The present invention relates to the field of sonar detection technology, and in particular to a clamping device, an underwater acoustic transducer testing system and a testing method. Background Art

[0002] With the gradual technological breakthroughs in underwater acoustic systems and equipment, users have put forward higher requirements for the long-distance communication, low-noise target recognition, and low-noise characteristic target detection performance of underwater acoustic systems. As the front-end equipment of the underwater acoustic system, the transducer has an important impact on the performance of the underwater acoustic system. In underwater acoustic testing, the test distance error and sound field non-uniformity error introduced by the installation and positioning of the sound center are an important source of test errors. Whether the position of the sound center is installed correctly during the installation of the transducer has an important impact on the entire underwater acoustic test.

[0003] In the prior art, the cable length of the transducer is often adjusted by tightening or loosening screws using tools such as screwdrivers, which does not change during disassembly and requires collaborative operation by multiple persons, resulting in low efficiency.

[0004] There is currently no effective solution to the problems in the prior art of inconvenient cable length adjustment and difficulty in aligning the sound center. Summary of the invention

[0005] To solve the above problems, the present invention provides a clamping device, an underwater acoustic transducer testing system and a testing method, wherein an adjustable clamping component is provided to clamp the cable, and the length of the cable is adjusted by adjusting the component to locate the sound center, thereby solving the problems in the prior art of inconvenient cable length adjustment and difficulty in aligning the sound center.

[0006] To achieve the above-mentioned purpose, the present invention provides a clamping device, including: a frame body, a fixed flange, a first bracket, a second bracket and an adjustable clamping assembly; one end of the fixed flange is fixed to the top of the frame body, and the other end passes through the top of the frame body to be connected with the first bracket and the second bracket, and the first bracket and the second bracket are detachably connected to the opposite sides of the fixed flange through a limiting ring hoop; there are multiple adjustable clamping assemblies, which are respectively mounted on the first bracket and the second bracket, and the adjustable clamping assembly is provided with adjustable clamping holes for clamping.

[0007] Further optionally, the adjustable clamping assembly includes a slider, a push plate clamp, a clamping block and an adjustable tightening handle; the slider is provided with a through slot, the direction of which is consistent with the direction of the line connecting the center points of the two end surfaces of the slider, and is used to be sleeved into the first bracket or the second bracket; the clamping block is detachably connected to the fixing surface of the slider for fixing, and the push plate clamp is movably connected to the inside of the clamping block, and corresponding sliding grooves are provided on the two side surfaces of the clamping block for connecting the push plate clamp, and the sliding grooves are arranged perpendicular to the through slots; the push plate clamp has a first groove on the bottom surface of the push plate clamp, and a second groove is provided at a position corresponding to the first groove of the fixing surface of the slider, and the first groove and the second groove cooperate to clamp the object to be clamped; the screw end of the adjustable tightening handle passes through the clamping block and the push plate clamp in turn, and the screw of the adjustable tightening handle is fixedly connected to the push plate clamp and is spirally connected to the clamping block.

[0008] Further optionally, the screw of the adjustable tightening handle is fixedly connected to the push plate clamp, including: a fixing groove is opened near the screw end of the adjustable tightening handle; the screw end of the adjustable tightening handle is inserted into the push plate clamp from the top of the push plate clamp and is threadedly connected to the push plate clamp; and a limit screw is inserted into the fixing groove from the side of the push plate clamp.

[0009] Further optionally, the first groove is an arc-shaped groove; the second groove is an arc-shaped groove; and the sizes of the first groove and the second groove are adapted to the object to be clamped.

[0010] Further optionally, the size of the free end of the fixing flange is larger than the size of its main body, and a limiting step is formed at the junction of the free end and the main body; there are two limiting ring hoops, which are located at the top of the limiting step and are respectively arranged on the opposite sides of the fixing flange and are connected by screws after being matched; the annular part of any limiting ring hoop is adapted to the main body of the fixing flange, and the two wings are respectively fixedly connected to the first bracket and the second bracket.

[0011] On the other hand, an embodiment of the present invention further provides an underwater acoustic transducer testing system, comprising the above-mentioned clamping device: a cable of a standard hydrophone is clamped in the clamping hole of the adjustable clamping assembly of the first bracket, and the other end of the cable is connected to the testing device; a cable of a transducer to be tested is clamped in the clamping hole of the adjustable clamping assembly of the second bracket, and the other end of the cable is connected to the testing device; a standing wave cavity corresponding to the standard hydrophone and the transducer to be tested is provided at the bottom of the bracket; and a spirit level is provided on the outside of the bracket.

[0012] On the other hand, an embodiment of the present invention further provides an underwater acoustic transducer testing method, which uses the above-mentioned underwater acoustic transducer testing system for testing, including: fixing the cable of the standard hydrophone on the first bracket through an adjustable clamping assembly according to a predetermined cable length; fixing the cable of the transducer under test on the second bracket through the adjustable clamping assembly; projecting a horizontal line emitted by a spirit level onto the acoustic center of the standard hydrophone; adjusting the cable length of the transducer under test so that the acoustic center of the transducer under test and the acoustic center of the standard hydrophone are on the same horizontal line; loosening the limiting hoop so that the first bracket and the second bracket fall together until they enter the standing wave cavity, and performing a performance test through a testing device.

[0013] The above technical scheme has the following beneficial effects: the present invention has a first bracket and a second bracket that are detachably connected by a limiting ring inside the frame, so that the first bracket and the second bracket can rise and fall together; an adjustable clamping assembly is provided on the first bracket and the second bracket, and the adjustable clamping assembly can be moved horizontally on the first bracket or the second bracket; an adjustable clamping hole is provided in the adjustable clamping assembly, and the size of the adjustable clamping hole is adjustable. After the object to be clamped is clamped by the clamping hole, the tightness of the clamping hole can be adjusted to achieve vertical position adjustment of the object to be clamped. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 is a schematic structural diagram of a clamping device provided by an embodiment of the present invention;

[0016] Figure 2 is a structural schematic diagram of an adjustable clamping assembly provided by an embodiment of the present invention;

[0017] Figure 3 is a structural schematic diagram of an adjustable clamping assembly from another viewing angle provided by an embodiment of the present invention;

[0018] Figure 4 is a schematic structural diagram of an adjustable tightening handle provided by an embodiment of the present invention;

[0019] Figure 5 It is a structural schematic diagram of an underwater acoustic transducer testing system provided in an embodiment of the present invention.

[0020] Reference numerals: 1-frame 2-fixing flange 3-first bracket 4-second bracket 5-adjustable clamping assembly 501-slider 5011-through slot 502-push plate clamp 503-block 504-adjustable tightening handle 6-limiting ring 7-standard hydrophone 8-transducer under test 9-standing wave cavity 10-level 11-limiting screw 12-fixing slot DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In order to solve the above problems of inconvenient cable length adjustment and difficulty in aligning the acoustic center, an embodiment of the present invention provides a clamping device. Figure 1 is a schematic diagram of the structure of the clamping device provided by an embodiment of the present invention, such as Figure 1 As shown, the device includes: a frame body 1, a fixed flange 2, a first bracket 3, a second bracket 4 and an adjustable clamping assembly 5; one end of the fixed flange 2 is fixed to the top of the frame body 1, and the other end passes through the top of the frame body 1 and is connected to the first bracket 3 and the second bracket 4, and the first bracket 3 and the second bracket 4 are detachably connected to the opposite sides of the fixed flange 2 through a limiting ring hoop 6; there are multiple adjustable clamping assemblies 5, which are respectively mounted on the first bracket 3 and the second bracket 4, and the adjustable clamping assembly 5 is provided with adjustable clamping holes for clamping.

[0023] like Figure 1 As shown, the frame 1 is a frame structure as a whole and has a certain height. In this embodiment, the frame 1 is welded by a plurality of channel steels. A top plate is provided on the top of the frame 1, one end of the fixed flange 2 is fixed to the top plate of the frame 1, and the other end, i.e., its free end, passes through the top plate and hangs vertically. The first bracket 3 and the second bracket 4 are respectively connected to the opposite sides of the fixed flange 2. The first bracket 3 and the second bracket 4 are both arranged perpendicular to the fixed flange 2, and the top surfaces of the two brackets are located on the same horizontal plane. In this embodiment, the first bracket 3 and the second bracket 4 are assembled and fixed by screws and the positioning grooves of the fixed flange 2, and the fixed ends of the first bracket 3 and the second bracket 4 are connected to the fixed flange 2 by a limiting hoop 6. The limiting hoop 6 is clamped on the fixed flange 2, and the position of the limiting hoop 6 can be adjusted by loosening the screw. An adjustable clamping assembly 5 is sleeved on the first bracket 3 and the second bracket 4. The adjustable clamping assembly 5 is movable in the horizontal direction and is provided with a clamping hole for clamping. The size of the clamping hole is adjustable and is used for clamping and adjusting the object to be clamped.

[0024] By adopting the above device, the position adjustment of the object to be clamped in the horizontal direction and the vertical direction can be realized, and the adjustment method is simple and convenient.

[0025] As an optional implementation, Figure 2 is a schematic structural diagram of an adjustable clamping assembly 5 provided in an embodiment of the present invention, Figure 3 FIG. 1 is a schematic structural diagram of an adjustable clamping assembly 5 from another perspective provided by an embodiment of the present invention. Figure 2 , Figure 3 As shown, the adjustable clamping assembly 5 includes a slider 501, a push plate clamp 502, a clamping block 503 and an adjustable tightening handle 504; the slider 501 is provided with a through slot 5011, the direction of which is consistent with the direction of the line connecting the center points of the two end surfaces of the slider 501, and is used to be sleeved into the first bracket 3 or the second bracket 4; the clamping block 503 is detachably connected to the fixed surface of the slider 501 for fixing, the push plate clamp 502 is movably connected inside the clamping block 503, and the push plate clamp is used to connect the push plate clamp inside the clamping block 503 Corresponding sliding grooves are provided on both side surfaces of 502, and the sliding grooves are arranged perpendicular to the through groove 5011; a first groove is provided on the bottom surface of the push plate clamp 502, and a second groove is provided on the fixed surface of the slider 501 at a position corresponding to the first groove, and the first groove and the second groove cooperate to clamp the object to be clamped; the screw end of the adjustable tightening handle 504 passes through the clamping block 503 and the push plate clamp 502 in sequence, and the screw of the adjustable tightening handle 504 is fixedly connected to the push plate clamp 502 and spirally connected to the clamping block 503.

[0026] like Figure 2 As shown, the slider 501 in the adjustable clamping assembly 5 is a square block. Figure 3 It can be seen that the slider 501 is provided with a through slot 5011, which starts from one end surface and passes through to the opposite end surface. Figure 1 It can be seen that the through slot 5011 is adapted to the first bracket 3 and the second bracket 4, and its size is larger than that of the first bracket 3 and the second bracket 4, so that the first bracket 3 or the second bracket 4 passes through the through slot 5011 to sleeve the adjustable clamping assembly 5 on the outside of the bracket.

[0027] The side surface of the slider 501, i.e., the fixing surface for fixing, is connected with a clamping block 503. Figure 2 As shown, the block 503 is generally arched, and its two horizontal sides are fixed to the side surfaces of the slider 501 by screws. When the object to be clamped needs to be replaced, the block 503 only needs to be removed from the slider 501, which is simple and convenient. The two opposite sides of the arched inner cavity of the block 503 are provided with longitudinal slide grooves, and the direction of the slide grooves is perpendicular to the direction of the through groove 5011.

[0028] Corresponding to the slide groove, a push plate clamp 502 corresponding to the slide groove is also provided in the arched inner cavity of the card block 503. The height of the push plate clamp 502 is less than the height of the arched inner cavity. The bottom of the push plate clamp 502 is provided with mounting plates extending to both sides. The two mounting plates are respectively installed corresponding to the slide groove, so that the push plate clamp 502 can slide back and forth in the direction of the slide groove in the arched inner cavity of the card block 503. The bottom surface of the push plate clamp 502 can be against the fixed surface part of the slider 501 located in the arched inner cavity. The bottom surface of the push plate clamp 502 is provided with a first groove, and the fixed surface of the slider 501 is provided with a second groove corresponding to the first groove. The first groove and the second groove jointly form a clamping hole, and the tightness of the clamping hole will change with the reciprocating linear motion of the push plate clamp 502. The object to be clamped is clamped in the clamping hole jointly formed by the first groove and the second groove, and the clamping hole is opened in the vertical direction. When the clamping hole becomes larger, the friction between the clamping hole and the object to be clamped decreases, and the object to be clamped falls under the action of gravity; when the clamping hole becomes smaller, the friction between the clamping hole and the object to be clamped increases, so that the object to be clamped no longer falls.

[0029] The adjustable tightening handle 504 (JB / T7270.12) includes a handle and a screw connected to the handle, and the end of the screw passes through the block 503 and the push plate clamp 502 in turn and is connected to the two. Specifically, the screw is threadedly connected to the block 503 and fixedly connected to the push plate clamp 502, so that when the handle is turned, the push plate clamp 502 can move linearly in the direction of the slide groove. By using the sawtooth bite principle in the adjustable tightening handle 504, the screw is loosened and tightened. When the handle is screwed in clockwise, the push plate clamp 502 moves inward to press the object to be clamped; conversely, when the cable height needs to be adjusted, the handle is turned counterclockwise, and the push plate clamp 502 loosens the object to be clamped outward, which facilitates the height adjustment of the object to be clamped.

[0030] Thus, when the vertical height of the object to be clamped needs to be adjusted, the handle portion of the adjustable tightening handle 504 only needs to be rotated to drive the screw portion to rotate, so as to adjust the distance between the first groove and the second groove and meet the frictional force requirement of the object to be clamped. When the object to be clamped needs to fall, the adjustable tightening handle 504 is rotated to increase the distance between the first groove and the second groove; when the object to be clamped needs to be fixed, the adjustable tightening handle 504 is rotated to decrease the distance between the first groove and the second groove.

[0031] As an optional embodiment, the screw of the adjustable locking handle 504 is fixedly connected to the push plate clamp 502, including: a fixing groove 12 is opened near the screw end of the adjustable locking handle 504; the screw end of the adjustable locking handle 504 is inserted into the push plate clamp 502 from the top of the push plate clamp 502 and is threadedly connected to the push plate clamp 502; and a limit screw 11 is inserted into the fixing groove 12 from the side of the push plate clamp 502.

[0032] Figure 4 is a schematic diagram of the structure of the adjustable tightening handle 504 provided in an embodiment of the present invention. Figure 4 As shown, the adjustable locking handle 504 is provided with a fixing groove 12 near the end of the screw rod, and the fixing groove 12 is not provided with threads, but continuous threads are provided on both sides of the fixing groove 12. The fixing groove 12 is inserted into the push plate clamp 502 together with the end of the screw rod, and the limit screw 11 is inserted from the outside of the push plate clamp 502, and the free end enters the fixing groove 12. At this time, the threaded part of the screw rod inside the push plate clamp 502 is threadedly connected with the push plate clamp 502. When the screw rod rotates, the limit screw 11 is subjected to thrust to drive the push plate clamp 502 to move toward the slider 501 or in the opposite direction, so as to convert the rotational motion into linear motion.

[0033] As an optional implementation, Figure 2 As shown, the first groove is an arc groove; the second groove is an arc groove; the sizes of the first groove and the second groove are adapted to the object to be clamped.

[0034] like Figure 2 As shown, the first groove and the second groove are both in the shape of arc grooves, and the size is adapted to the object to be clamped, so as to avoid applying other forces to the object to be clamped and causing deformation of the object to be clamped while clamping the object to be clamped.

[0035] As an optional implementation, Figure 1 As shown, the size of the free end of the fixing flange 2 is larger than the size of its main body, and a limiting step is formed at the junction of the free end and the main body; there are two limiting ring hoops 6, which are located at the top of the limiting step and are respectively arranged on the opposite sides of the fixing flange 2, and are connected by screws after being matched; the annular part of any limiting ring hoop 6 is adapted to the main body of the fixing flange 2, and the two wings are fixedly connected to the first bracket 3 and the second bracket 4 respectively.

[0036] The fixing flange 2 is generally narrow at the top and wide at the bottom, and the free end is wider than the main body of the fixing flange 2, so that a circle of limiting steps is formed at the junction of the main body and the free end. The limiting hoop 6 is placed above the limiting step. When the limiting hoop 6 is tightened, its bottom is blocked by the limiting step to prevent the limiting hoop 6 from falling. The limiting hoop 6 adopts a two-petal type, which is fixed by screws after being relative. Its annular part is adapted to the main body of the fixing flange 2, and is set on the main body of the fixing flange 2 with a hoop. The two wings are respectively connected to the first bracket 3 and the second bracket 4, which is convenient for removal from the fixing flange 2.

[0037] The embodiment of the present invention provides an underwater acoustic transducer testing system. Figure 5 FIG. 1 is a schematic diagram of the structure of an underwater acoustic transducer testing system provided by an embodiment of the present invention. Figure 5As shown, it includes the above-mentioned clamping device: the cable of the standard hydrophone 7 is clamped in the clamping hole of the adjustable clamping component 5 of the first bracket 3, and the other end of the cable is connected to the test device; the cable of the measured transducer 8 is clamped in the clamping hole of the adjustable clamping component 5 of the second bracket 4, and the other end of the cable is connected to the test device; a standing wave cavity 9 corresponding to the standard hydrophone 7 and the measured transducer 8 is provided at the bottom of the bracket 1; a level 10 is provided on the outside of the bracket 1.

[0038] like Figure 5 As shown, in this embodiment, the above-mentioned clamping device is used in the test system of the underwater acoustic transducer, the cable of the standard hydrophone 7 is clamped in the clamping hole of the adjustable clamping assembly 5 of the first bracket 3, and the cable of the measured transducer 8 is clamped in the clamping hole of the adjustable clamping assembly 5 of the second bracket 4. Under the two, the bottom of the frame 1 is provided with a standing wave cavity 9 corresponding to the standard hydrophone 7 and the measured transducer 8, which is used to accommodate the standard hydrophone 7 and the measured transducer 8. When the sound centers of the standard hydrophone 7 and the measured transducer 8 are on the same horizontal line, the two are placed horizontally in the standing wave cavity 9, and the sensitivity of the transducer is tested through the test device connected to the other end of the cable.

[0039] A high-precision level 10 is used to mark the acoustic center position of the transducer 8 under test in advance, and the vertical distance error with the standard hydrophone 7 is within ±1mm, thereby improving the installation and test accuracy.

[0040] The embodiment of the present invention provides a method for testing an underwater acoustic transducer, which uses the above-mentioned underwater acoustic transducer testing system for testing, and includes:

[0041] S1. Fix the cable of the standard hydrophone 7 on the first bracket 3 through the adjustable clamping assembly 5 according to the predetermined cable length;

[0042] S2, fixing the cable of the measured transducer 8 on the second bracket 4 through the adjustable clamping assembly 5;

[0043] S3, projecting the horizontal line emitted by the level meter 10 onto the acoustic center of the standard hydrophone 7;

[0044] S4, adjusting the cable length of the measured transducer 8 so that the acoustic center of the measured transducer 8 and the acoustic center of the standard hydrophone 7 are on the same horizontal line;

[0045] S5. Loosen the limiting ring hoop 6 to make the first bracket 3 and the second bracket 4 fall together until they enter the standing wave cavity 9, and perform a performance test using a testing device.

[0046] Before the test, tighten the limit ring 6 to ensure that the standard hydrophone 7 and the transducer 8 under test are both located above the standing wave cavity 9. Hang the cable of the standard hydrophone 7 in the adjustable clamping hole of the adjustable clamping assembly 5 of the first bracket 3. The cable length is the height of the ball center of the standard hydrophone 7 after it is placed in the standing wave cavity 9, which is 10-15 cm above the cavity. At this time, install the transducer 8 under test in the adjustable mounting hole of the adjustable clamping assembly 5 of the second bracket 4, pre-adjust the cable length of the transducer 8 under test, turn on the laser level 10, and use the level 10 to project the horizontal line onto the transducer 8 under test and the standard hydrophone 7. First, align the light beam with the sound center of the standard hydrophone 7, observe the transducer 8 under test, and adjust the cable height of the transducer 8 under test so that the sound center of the transducer 8 under test coincides with the horizontal line. At this time, the vertical error between the acoustic center of the measured transducer 8 and the acoustic center of the standard hydrophone 7 is within ±1 mm (ie, the accuracy level of the level 10).

[0047] After the above assembly is completed, loosen the limit ring 6, and the transducer and the bracket are lowered into the standing wave cavity 9. At this time, the other end of the cable between the transducer 8 and the standard hydrophone 7 is connected to the test system, and the test system is turned on for sensitivity test.

[0048] The above technical scheme has the following beneficial effects: the present invention has a first bracket 3 and a second bracket 4 that are detachably connected by a limiting ring hoop 6 inside the frame body 1, so that the first bracket 3 and the second bracket 4 can rise and fall together; an adjustable clamping assembly 5 is provided on the first bracket 3 and the second bracket 4, and the adjustable clamping assembly 5 can be moved horizontally on the first bracket 3 or the second bracket 4; an adjustable clamping hole is provided in the adjustable clamping assembly 5, and the size of the adjustable clamping hole is adjustable. After the object to be clamped is clamped by the clamping hole, the tightness of the clamping hole can be adjusted to achieve vertical position adjustment of the object to be clamped.

[0049] The specific implementation methods of the above invention further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above invention is only a specific implementation method of the present invention and is not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A clamping device, characterized in that: include: A frame body, a fixing flange, a first bracket, a second bracket and an adjustable clamping assembly; One end of the fixing flange is fixed to the top of the frame body, and the other end passes through the top of the frame body and is connected to the first bracket and the second bracket, and the first bracket and the second bracket are detachably connected to the opposite sides of the fixing flange through a limiting ring hoop; The adjustable clamping components are multiple and are respectively sleeved on the first bracket and the second bracket. The adjustable clamping components are provided with adjustable clamping holes for clamping; The adjustable clamping assembly includes a slide block, a push plate clamp, a clamp block and an adjustable tightening handle; The slider is provided with a through slot, the direction of which is consistent with the direction of the line connecting the center points of the two end surfaces of the slider, and is used for being sleeved into the first bracket or the second bracket; The card block is detachably connected to the fixed surface of the slider for fixing, the push plate clamp is movably connected inside the card block, and corresponding sliding grooves are provided on the two side surfaces inside the card block for connecting the push plate clamp, and the sliding grooves are arranged perpendicular to the through groove; The bottom surface of the push plate clamp is provided with a first groove, and the fixed surface of the slider is provided with a second groove at a position corresponding to the first groove, and the first groove and the second groove cooperate to clamp the object to be clamped; The screw end of the adjustable tightening handle passes through the clamping block and the push plate clamp in sequence, and the screw of the adjustable tightening handle is fixedly connected to the push plate clamp and is spirally connected to the clamping block; The size of the free end of the fixing flange is larger than that of its main body, and a limiting step is formed at the junction of the free end and the main body; There are two limiting ring hoops, which are located at the top of the limiting step and are respectively arranged on two opposite sides of the fixing flange and connected by screws after being aligned; The annular portion of any limiting ring hoop is adapted to the main body of the fixing flange, and the two wings are fixedly connected to the first bracket and the second bracket respectively.

2. The clamping device according to claim 1, characterized in that: The screw of the adjustable tightening handle is fixedly connected to the push plate clamp, comprising: The screw of the adjustable tightening handle is provided with a fixing groove near the screw end; The screw end of the adjustable tightening handle is inserted into the push plate clamp from the top of the push plate clamp and is threadedly connected with the push plate clamp; The limiting screw penetrates into the fixing groove from the side of the push plate clamp.

3. The clamping device according to claim 1, characterized in that: The first groove is an arc-shaped groove; The second groove is an arc-shaped groove; The sizes of the first groove and the second groove are adapted to the object to be clamped.

4. An underwater acoustic transducer testing system, characterized in that: The clamping device comprising any one of claims 1 to 3: A cable of a standard hydrophone is clamped in the clamping hole of the adjustable clamping assembly of the first bracket, and the other end of the cable is connected to the test device; A cable of the transducer under test is clamped in the clamping hole of the adjustable clamping assembly of the second bracket, and the other end of the cable is connected to the test device; The bottom of the frame is provided with a standing wave cavity corresponding to the standard hydrophone and the transducer under test; A level is provided on the outside of the frame.

5. A method for testing an underwater acoustic transducer, characterized in that: The underwater acoustic transducer testing system as claimed in claim 4 is used for testing, comprising: According to the predetermined cable length, the cable of the standard hydrophone is fixed to the first bracket through the adjustable clamping assembly; Fixing the cable of the transducer under test on the second bracket through an adjustable clamping assembly; Project the horizontal line emitted by the level meter onto the acoustic center of the standard hydrophone; Adjust the cable length of the transducer under test so that the acoustic center of the transducer under test and the acoustic center of the standard hydrophone are on the same horizontal line; Loosen the limiting ring hoop to allow the first bracket and the second bracket to fall together until they enter the standing wave cavity, and perform a performance test using a testing device.

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