Hydrophone acceleration test clamp

Abstract

The utility model relates to the technical field of underwater acoustic detection, and provides a hydrophone acceleration test fixture, which comprises a fixed base, a connecting female seat and a fixed cylinder assembly, and is characterized in that the fixed base is mounted on a vibration table; the connecting female seat is connected to one end, far away from the vibration table, of the fixed base, and the connecting female seat is provided with a transverse test position, a vertical test position and a longitudinal test position of which the axial leads are perpendicular to each other and intersect with each other; the fixing cylinder is movably connected with the connecting female seat, so that the fixing cylinder can move among the transverse test position, the vertical test position and the longitudinal test position, the fixing cylinder is provided with an installation cavity, and the installation cavity is suitable for installing a hydrophone. According to the invention, the three-dimensional direction test axis of the hydrophone is vertical and intersected when the acceleration is tested, and the accuracy of the test result is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of underwater sound detection, in particular to a hydrophone acceleration test fixture. Background Art

[0002] Fiber-optic hydrophones are devices used to detect acoustic signals in oceans and other open waters. They have important applications in both military and civilian fields, such as oil exploration. In the military, they are core components of anti-submarine sonar. In civilian applications, they are used for seismic wave detection, oil seismic exploration, and marine fishery detection. Fiber-optic hydrophones come in a variety of structural forms, including mandrel, FP, and Sag nac types. Mandrel-type fiber-optic hydrophones with air cavities are widely used due to their high sensitivity and wide frequency bandwidth.

[0003] Fiber optic hydrophone acceleration testing is a technology used to measure the acceleration of underwater objects. This test typically uses a fiber optic hydrophone as a sensor to detect acceleration by measuring changes in the phase or intensity of light in the optical fiber. During the test, the fiber optic hydrophone is usually fixed to the object being tested. When the object moves, the light in the optical fiber will be affected by the Doppler effect, causing the phase or intensity of the light to change. These changes can be detected and converted into acceleration values ​​through signal processing algorithms.

[0004] In the related technical field, the existing fiber optic hydrophone test fixture cannot ensure that the three-dimensional test axis lines are perpendicular and intersecting during acceleration testing, which increases the possibility of error in the test results. Utility Model Content

[0005] The utility model provides a hydrophone acceleration test fixture, which is used to solve the defect in the prior art that the hydrophone acceleration test fixture cannot ensure that the three-dimensional test axis lines are perpendicular and intersecting. The utility model realizes that the three-dimensional test axis lines of the hydrophone are perpendicular and intersecting when testing acceleration, effectively ensuring the accuracy of the test results.

[0006] The utility model provides a hydrophone acceleration test fixture, comprising:

[0007] A fixed base, the fixed base being mounted on the vibration table;

[0008] A connecting female base connected to an end of the fixed base away from the vibration table, the connecting female base being provided with a transverse test position, a vertical test position, and a longitudinal test position whose axis lines are perpendicular to and intersect with each other;

[0009] A fixed cylinder assembly is movably connected with the connecting female seat, so that the fixed cylinder is transferred among the lateral test position, the vertical test position and the longitudinal test position, and the fixed cylinder has a mounting cavity suitable for mounting a hydrophone.

[0010] According to the hydrophone acceleration test fixture, the connecting female seat is in the shape of a cube, the lateral test position, the vertical test position and the longitudinal test position are respectively and individually communicated with two opposite end faces of the cube, and are intersectively arranged at the center of the cube.

[0011] According to the hydrophone acceleration test fixture, the fixed cylinder assembly comprises a fixed cylinder body, a center shaft and a fixed end cover, two ends of the fixed cylinder body are in an open arrangement, the fixed end cover is respectively sealed at the opening of the two ends, the mounting cavity is arranged in the fixed cylinder and is communicated with the opening, the center shaft is arranged in the mounting cavity along the axial direction of the fixed cylinder body, and the hydrophone is suspended in the mounting cavity through the center shaft.

[0012] According to the hydrophone acceleration test fixture, the fixed cylinder assembly further comprises an adjusting connecting piece, the center shaft and the fixed end cover are connected through the adjusting connecting piece, and the adjusting connecting piece is suitable for adjusting the central position of the center shaft.

[0013] According to the hydrophone acceleration test fixture, the lateral test position is provided with a lateral mounting through hole passing through a center point in the lateral direction of the connecting female seat, and the fixed cylinder assembly is inserted into the lateral test position through the lateral mounting through hole;

[0014] The vertical test position is provided with a vertical mounting through hole passing through a center point in the vertical direction of the connecting female seat, and the fixed cylinder assembly is inserted into the vertical test position through the vertical mounting through hole;

[0015] The longitudinal test position is provided with a longitudinal mounting through hole passing through a center point in the longitudinal direction of the connecting female seat, and the fixed cylinder assembly is inserted into the longitudinal test position through the longitudinal mounting through hole.

[0016] According to the hydrophone acceleration test fixture, a limiting step is arranged on the outer wall of the fixed cylinder assembly, the limiting step is in abutment with the end outer edge of the lateral mounting through hole, the vertical mounting through hole or the longitudinal mounting through hole, so as to install and position the fixed cylinder assembly and the connecting female seat.

[0017] The utility model provides a kind of hydrophone acceleration test fixture, the hydrophone acceleration test fixture further include fastener, the outer facade of the connecting female seat is respectively set with the fixed hole perpendicular to the transverse installation through-hole, the vertical installation through-hole or the longitudinal installation through-hole, the fastener is fixed in the transverse installation through-hole, the vertical installation through-hole or the longitudinal installation through-hole by the fixed hole with the fixed cylinder subassembly.

[0018] The utility model provides a kind of hydrophone acceleration test fixture, the end portion of the fixed base and the connecting female seat is equipped with threaded hole, the fixed base is connected with the connecting female seat by the threaded hole and is screwed.

[0019] The utility model provides a kind of hydrophone acceleration test fixture, the hydrophone acceleration test fixture further include set screw, the end portion of the fixed base and the connecting female seat is respectively equipped with locking hole on both sides, the set screw is locked to the connecting female seat and fixed base by the connecting hole.

[0020] The utility model provides a kind of hydrophone acceleration test fixture, the bottom of the threaded hole is equipped with avoiding groove, the avoiding groove is suitable for avoiding the fixed cylinder subassembly.

[0021] The utility model provides a kind of hydrophone acceleration test fixture, by machining perpendicular to each face precision cooperation three transverse test sites, vertical test site and longitudinal test site on the three direction faces of connecting female seat and the axis of three test sites is in the center of connecting female seat intersection, so that the axis of hydrophone is in the perpendicular intersection state in the center of fixture when testing vertical and transverse and longitudinal acceleration, so as to effectively guarantee the accuracy of test result. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will be a simple introduction to the drawings needed to be used in embodiment or prior art description, obviously, the following description in the drawings is some embodiments of the utility model, for those skilled in the art, without creative labor, other drawings can also be obtained according to these drawings.

[0023] Figure 1 It is the structure schematic view of a embodiment of the utility model provides a kind of hydrophone acceleration test fixture.

[0024] Figure 2 It is the plan view when the utility model provides a kind of hydrophone acceleration test fixture is in vertical test.

[0025] Figure 3 It is Figure 2 sectional view of A-A in the figure.

[0026] Figure 4 is the top view of the hydrophone acceleration test fixture in the horizontal test provided by the utility model.

[0027] Figure 5 is Figure 2 the section view at B-B in the middle.

[0028] Figure 6 is the top view of the hydrophone acceleration test fixture in the vertical test provided by the utility model.

[0029] Figure 7 is Figure 2 the section view at C-C in the middle.

[0030] Reference signs:

[0031] 10, hydrophone acceleration test fixture;

[0032] 100, fixed base; 110, threaded hole; 120, avoiding slot;

[0033] 200, connecting female seat; 210, horizontal installation through hole; 220, vertical installation through hole; 230, vertical installation through hole; 240, fixed hole; 240a, horizontal fixed hole; 240b, vertical fixed hole; 240c, vertical fixed hole;

[0034] 300, fixed cylinder assembly; 310, fixed cylinder body; 311, installation cavity; 312, open; 313, limiting step; 320, center shaft; 330, fixed end cover;

[0035] 400, adjusting connecting piece;

[0036] 500, fastener;

[0037] 600, locking screw. DETAILED DESCRIPTION

[0038] The embodiments of the utility model will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0039] In the description of the embodiments of the utility model, it needs to be explained that, the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the utility model and simplifying the description, and does not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the embodiments of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the embodiments of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0041] In the embodiments of the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0042] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0043] The following will be combined Figures 1 to 7The hydrophone acceleration test fixture provided by the utility model embodiment is described in detail through specific embodiments and application scenarios.

[0044] In the utility model embodiment, refer to Figures 1 to 3 The hydrophone acceleration test fixture 10 comprises a fixed base 100, a connecting female seat 200 and a fixed cylinder assembly 300, the fixed base 100 is installed on a vibration table; the connecting female seat 200 is connected to one end of the fixed base 100 away from the vibration table, horizontal test positions, vertical test positions and longitudinal test positions which are perpendicular to each other and intersect with each other are formed on the connecting female seat 200; the fixed cylinder is movably connected with the connecting female seat 200, so that the fixed cylinder can flow between the horizontal test positions, the vertical test positions and the longitudinal test positions, and the fixed cylinder has an installation cavity 311 which is suitable for installing a hydrophone.

[0045] The hydrophone acceleration test fixture 10 is firmly installed on the vibration table through the fixed base 100, and a stable working platform is provided for the whole test fixture.

[0046] The horizontal test positions, the vertical test positions and the longitudinal test positions which are perpendicular to each other and intersect with each other formed on the connecting female seat 200 ensure that the hydrophone can be accurately aligned with the axial lines of each direction during the test process, thereby improving the test precision.

[0047] The connecting female seat 200 not only supports the fixed cylinder assembly 300, but also realizes smooth flow and cooperation of the fixed cylinder between different test positions through precise machining and cooperation.

[0048] The installation cavity 311 inside the fixed cylinder is suitable for installing a hydrophone, and the stability and reliability of the hydrophone during the test process are ensured.

[0049] The hydrophone acceleration test fixture 10 provided by the utility model comprises three horizontal test positions, vertical test positions and longitudinal test positions which are perpendicular to each other and intersect with each other at the center of the connecting female seat 200, so that the axial center of the hydrophone is in a perpendicular intersection state in the center of the fixture when the hydrophone is tested in the vertical and horizontal and longitudinal acceleration directions, thereby effectively ensuring the accuracy of the test results.

[0050] Referring to Figures 1 to 3 In some embodiments, the connecting female seat 200 is arranged in a cubic shape, and the horizontal test site, the vertical test site and the longitudinal test site are respectively connected to two opposite end faces of the cube, and are arranged to intersect at the center of the cube.

[0051] It can be understood that, in the present embodiment, by arranging the connecting female seat 200 in a cubic shape, due to the stability and symmetry of the cubic shape, the connecting female seat 200 can remain stable when subjected to various forces from the vibration table and the hydrophone. Due to the symmetry of the cubic shape, the axis lines of the three test sites can be ensured to accurately and perpendicularly intersect at the center of the cube, thereby meeting the needs of high-precision three-dimensional acceleration testing. At the same time, the cubic connecting female seat 200 is relatively simple in the processing process, and can be produced by standardized processing equipment and processes, thereby reducing the processing difficulty and cost.

[0052] Of course, in other embodiments, the connecting female seat 200 can also be a spherical shape, and the horizontal test site, the vertical test site and the longitudinal test site can pass through a through hole of a diameter perpendicular to each other and passing through the center of the sphere.

[0053] Referring to Figure 3 , Figure 5 and Figure 7 In some embodiments, the fixing cylinder assembly 300 includes a fixing cylinder body 310, a center shaft 320 and a fixing end cover 330. The two ends of the fixing cylinder body 310 are arranged in an open 312, and the fixing end cover 330 is respectively sealed at the two end openings 312. The mounting cavity 311 is arranged in the fixing cylinder and is in communication with the opening 312. The center shaft 320 is arranged in the mounting cavity 311 along the axis direction of the fixing cylinder body 310, and the hydrophone is suspended in the mounting cavity 311 by the center shaft 320.

[0054] It can be understood that the fixing cylinder body 310 is the main part of the entire fixing cylinder assembly 300, and the two ends are arranged in an open 312 to provide convenience for the subsequent assembly process, and also enable the internal mounting cavity 311 to be in communication with the outside (or a specific environment). The mounting cavity 311 is a space inside the fixing cylinder body 310 for mounting and fixing the hydrophone. The mounting cavity 311 is in communication with the opening 312 of the fixing cylinder body 310, so as to conveniently enter the mounting cavity 311 through the opening 312 for operation.

[0055] The fixing end cover 330 is respectively installed at the two openings 312 of the fixing cylinder body 310, and is suitable for sealing or opening the opening 312, thereby forming a closed or semi-closed mounting space.

[0056] By blocking the open end 312, the fixed end cap 330 not only protects the equipment (such as hydrophones) inside the mounting cavity 311, but also ensures the relative stability of the internal environment of the mounting cavity 311, avoiding external factors interfering with the internal equipment.

[0057] The central shaft 320 is a component that is inserted along the axis direction of the fixed cylinder body 310 into the mounting cavity 311.

[0058] It is suitable for supporting and fixing the hydrophone, allowing the hydrophone to be suspended in the mounting cavity 311. Suspended setting helps to reduce the contact and friction between the hydrophone and the fixed cylinder body 310, thereby improving the accuracy and stability of the measurement.

[0059] Referring to Figure 3 , Figure 5 and Figure 7 , in some embodiments, the fixed cylinder assembly 300 further comprises an adjusting connector 400, the central shaft 320 and the fixed end cap 330 are connected through the adjusting connector 400, and the adjusting connector 400 is suitable for adjusting the central position of the central shaft 320.

[0060] It can be understood that during installation, the hydrophone is placed in the mounting cavity 311, the two end fixed end caps 330 are tightened, and then the central shaft 320 is tightened by adjusting the two end set screws 600. After tightening, use a caliper to measure whether the length of the two end set screws 600 protruding out is consistent, and adjust the hydrophone to remain in a suspended state in the fixed protection cylinder. The adjusting connector 400 serves as a bridge between the central shaft 320 and the fixed end cap 330, allowing fine adjustment of the position of the central shaft 320 to adjust the axial position of the hydrophone fitted on the central shaft 320.

[0061] The design of the adjusting connector 400 makes it more convenient to install and disassemble the central shaft 320. Testers can easily connect or separate the central shaft 320 and the fixed end cap 330 through the adjusting connector 400, thereby simplifying the installation and maintenance process.

[0062] In addition, the adjusting connector 400 also allows testers to fine-tune the central shaft 320 without disassembling the entire fixed cylinder assembly 300, which further improves the flexibility and efficiency of testing.

[0063] By adjusting the position and size of the adjusting connector 400, this design can also adapt to different specifications and models of hydrophones. This flexibility makes the fixed cylinder assembly 300 widely applicable to various testing scenarios and environments, improving its versatility and practicality.

[0064] Referring to Figures 1 to 5In some embodiments, the lateral test position is provided with a lateral mounting through hole 210 along the lateral center passing point of the connecting base 200, and the fixing cylinder assembly 300 is inserted into the lateral test position through the lateral mounting through hole 210; the vertical test position is provided with a vertical mounting through hole 220 along the vertical center passing point of the connecting base 200, and the fixing cylinder assembly 300 is inserted into the vertical test position through the vertical mounting through hole 220; the longitudinal test position is provided with a longitudinal mounting through hole 230 along the longitudinal center passing point of the connecting base 200, and the fixing cylinder assembly 300 is inserted into the longitudinal test position through the longitudinal mounting through hole 230.

[0065] It can be understood that in the lateral direction of the connecting base 200, a lateral mounting through hole 210 passing through the center point is designed. When testing or installation in the horizontal direction is required, the fixing cylinder assembly 300 can be directly inserted into the lateral test position through the lateral mounting through hole 210. The vertical test position is similar to the lateral test position, and the connecting base 200 is provided with a vertical mounting through hole 220 passing through the center point. When the testing or installation requirement turns to the vertical direction, the fixing cylinder assembly 300 can be easily inserted into the vertical test position through the vertical mounting through hole 220. In the longitudinal direction of the connecting base 200, a longitudinal mounting through hole 230 passing through the center point is also designed. In the testing or installation scene along the length direction of the connecting base 200, the fixing cylinder assembly 300 can be connected with the longitudinal test position through the longitudinal mounting through hole 230. In this way, the fixing and installation of the hydrophone when the lateral axis, the vertical axis and the longitudinal axis are perpendicular and intersected during the testing acceleration can be ensured.

[0066] Referring to Figure 1 and Figure 3 In some embodiments, a limiting step 313 is arranged on the outer wall of the fixing cylinder assembly 300, and the limiting step 313 abuts against the end outer edge of the lateral mounting through hole 210, the vertical mounting through hole 220 or the longitudinal mounting through hole 230 to position the fixing cylinder assembly 300 and the connecting base 200 during installation.

[0067] It can be understood that the limiting step 313 is a protruding structure on the outer wall of the fixing cylinder assembly 300 to ensure that the end outer edge of the lateral mounting through hole 210, the vertical mounting through hole 220 or the longitudinal mounting through hole 230 can be closely abutted. When the fixing cylinder assembly 300 is inserted into the corresponding mounting through hole, the limiting step 313 will contact the end outer edge of the through hole, thereby limiting the further insertion depth of the fixing cylinder assembly 300. Not only can the fixing cylinder assembly 300 be correctly installed in place, but also damage or instability caused by excessive insertion can be avoided.

[0068] In addition, the limiting step 313 also plays a role in positioning. During the insertion process, once the limiting step 313 abuts against the outer edge of the through hole end, it means that the fixing cylinder assembly 300 has reached the predetermined installation position. This clear positioning feedback helps the operator to quickly and accurately complete the installation process, improving work efficiency and installation quality.

[0069] Referring to Figure 1 In some embodiments, the hydrophone acceleration test fixture 10 further comprises fasteners 500, and fixing holes 240 perpendicular to the transverse mounting through hole 210, the vertical mounting through hole 220 or the longitudinal mounting through hole 230 are respectively arranged on the outer surface of the connecting female seat 200. The fasteners 500 pass through the fixing holes 240 to fix the fixing cylinder assembly 300 in the transverse mounting through hole 210, the vertical mounting through hole 220 or the longitudinal mounting through hole 230.

[0070] It can be understood that the fasteners 500 are suitable for firmly fixing the fixing cylinder assembly 300 on the connecting female seat 200. The fasteners 500 include bolts, screws, nuts, etc. They can be set according to specific needs.

[0071] The fixing holes 240 are arranged on the outer surface of the connecting female seat 200, and are perpendicular to the transverse mounting through hole 210, the vertical mounting through hole 220 or the longitudinal mounting through hole 230. The main function of the fixing holes 240 is to provide a channel for the fasteners 500 to pass through, so as to fix the fixing cylinder assembly 300 at the predetermined installation position. Since the fixing holes 240 are perpendicular to the mounting through holes, this ensures that the fasteners 500 can exert a fastening force vertically, thereby enhancing the stability and reliability of the connection.

[0072] Referring to Figure 1 The fixing holes 240 include two transverse fixing holes 240a, two vertical fixing holes 240c and two longitudinal fixing holes 240b. Each fixing hole is further fixed by a screw passing through the corresponding mounting through hole of the fixing cylinder assembly 300.

[0073] Referring to Figure 3 In some embodiments, the end of the fixing base 100 connected to the connecting female seat 200 is provided with a threaded hole 110, and the fixing base 100 is threadedly connected to the connecting female seat 200 through the threaded hole 110.

[0074] It can be understood that the fixing base 100 is designed with a threaded hole 110 on the end connected to the connecting female seat 200, that is, the inner wall of the threaded hole 110 has a helical thread. The corresponding part of the connecting female seat 200 to the threaded hole 110 of the fixing base 100 is also provided with an external thread. By rotating the connecting female seat 200, the external thread of the connecting female seat 200 is tightly engaged with the internal thread of the threaded hole 110 of the fixing base 100, thereby achieving the preliminary and effective connection and fixation of the two.

[0075] Referring to Figure 1 In some embodiments, the hydrophone acceleration test fixture 10 further comprises a locking screw 600. The end of the fixed base 100 connected to the connecting female seat 200 is provided with locking holes on both sides, and the locking screw 600 passes through the connecting hole to lock the connecting female seat 200 and the fixed base 100.

[0076] It can be understood that the locking screw 600 is suitable for locking or fixing the relative position between two or more components. The locking hole is opened on both sides of the end of the fixed base 100 connected to the connecting female seat 200, which is used to accommodate the locking screw 600. The position and number of locking holes are usually determined according to the specific design requirements and the connection strength.

[0077] When the fixed base 100 and the connecting female seat 200 are preliminarily connected by threads or other means, the locking screw 600 is inserted into the locking hole and passes through a part of the fixed base 100 until it contacts the connecting female seat 200 (or the contact surface between the connecting female seat 200 and the fixed base 100). By rotating the locking screw 600, the head or threaded part of the locking screw 600 is tightly fitted with the connecting female seat 200, and a certain locking force is applied. This locking force helps to prevent relative movement between the fixed base 100 and the connecting female seat 200, thereby enhancing the stability and reliability of the connection and preventing the connection between the fixed base 100 and the connecting female seat 200 from loosening during the test. The head shape of the locking screw 600 and the size of the locking force can be adjusted according to actual needs to ensure that the fastening degree and stability of the connection meet the test requirements.

[0078] Referring to Figure 3 In some embodiments, the bottom of the threaded hole 110 is provided with an avoidance slot 120, which is suitable for avoiding the fixed cylinder assembly 300.

[0079] It can be understood that when the fixed cylinder assembly 300 is installed into the connecting female seat 200 during vertical testing, its bottom or some parts may approach or contact the bottom of the threaded hole 110. The avoidance slot 120 can provide an additional space for the fixed cylinder assembly 300 to ensure that it does not interfere with the bottom of the threaded hole 110 during installation. Improve the reliability of the hydrophone acceleration test fixture 10.

[0080] It should be finally pointed out that: the above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been explained in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A hydrophone acceleration test fixture, characterized by, The utility model provides a hydrophone acceleration test fixture, which comprises a fixed base mounted on a vibration table, a connecting female seat connected to one end of the fixed base away from the vibration table, a horizontal test site, a vertical test site and a longitudinal test site with their axial lines perpendicular to each other and intersecting being formed in the connecting female seat, a fixed cylinder assembly movably connected with the connecting female seat so that the fixed cylinder assembly can flow among the horizontal test site, the vertical test site and the longitudinal test site, and the fixed cylinder having an installation cavity suitable for installing a hydrophone. The connecting female seat is in the shape of a cube, and the horizontal test site, the vertical test site and the longitudinal test site are respectively connected with two opposite end faces of the cube and are arranged at the center of the cube. The fixed cylinder assembly comprises a fixed cylinder body, a center shaft and a fixed end cover, two ends of the fixed cylinder body are in the shape of an open end, the fixed end cover is respectively sealed at the open ends, the installation cavity is arranged in the fixed cylinder and is connected with the open ends, the center shaft is arranged in the installation cavity along the axial direction of the fixed cylinder body, and the hydrophone is suspended in the installation cavity through the center shaft. The fixed cylinder assembly further comprises an adjusting connecting piece, the center shaft and the fixed end cover are connected through the adjusting connecting piece, and the adjusting connecting piece is suitable for adjusting the central position of the center shaft.

2. The hydrophone acceleration test fixture of claim 1, wherein, The horizontal test site is provided with a horizontal installation through hole passing through the horizontal center point of the connecting female seat, and the fixed cylinder assembly is inserted into the horizontal test site through the horizontal installation through hole.

3. The hydrophone acceleration test fixture of claim 1, wherein, The vertical test site is provided with a vertical installation through hole passing through the vertical center point of the connecting female seat, and the fixed cylinder assembly is inserted into the vertical test site through the vertical installation through hole.

4. The hydrophone acceleration test fixture of claim 3, wherein, The longitudinal test site is provided with a longitudinal installation through hole passing through the longitudinal center point of the connecting female seat, and the fixed cylinder assembly is inserted into the longitudinal test site through the longitudinal installation through hole.

5. The hydrophone acceleration test fixture of any of claims 1-4, wherein, A limiting step is arranged on the outer wall of the fixed cylinder assembly, and the limiting step is in abutment with the end outer edge of the horizontal installation through hole, the vertical installation through hole or the longitudinal installation through hole to position the fixed cylinder assembly and the connecting female seat. The hydrophone acceleration test fixture further comprises a fastener, and the outer surface of the connecting female seat is respectively provided with a fixing hole perpendicular to the horizontal installation through hole, the vertical installation through hole or the longitudinal installation through hole, and the fastener is arranged in the fixing hole to fix the fixed cylinder assembly in the horizontal installation through hole, the vertical installation through hole or the longitudinal installation through hole. The end of the fixed base connected with the connecting female seat is provided with a threaded hole, and the fixed base is threadedly connected with the connecting female seat through the threaded hole.

6. The hydrophone acceleration test fixture of claim 5, wherein, The hydrophone acceleration test fixture further comprises a locking screw, and the two sides of the end of the fixed base connected with the connecting female seat are respectively provided with a locking hole, and the locking screw is arranged in the locking hole to lock the connecting female seat and the fixed base.

7. The hydrophone acceleration test fixture of claim 5, wherein, The bottom of the threaded hole is provided with a avoiding groove suitable for avoiding the fixed cylinder assembly.

8. The hydrophone acceleration test fixture of any of claims 1-4, wherein, ​ 9. The hydrophone acceleration test fixture of claim 8, wherein, ​ 10. The hydrophone acceleration test fixture of claim 8, wherein, ​

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