Water entry test device

Abstract

The invention discloses a water entry test device. The water entry test device comprises a water tank which is provided with an accommodating space, and one side of the water tank in a first direction is provided with an opening communicated with the accommodating space; the guide rail is arranged on the peripheral side of the water tank, and at least part of the guide rail protrudes out of the water tank in the direction pointing to the opening from the containing space; the connecting structure comprises a first connecting assembly connected with the guide rail and a holder connected with the side, facing the water tank, of the first connecting assembly, and the first connecting assembly is movably arranged in the first direction relative to the guide rail. According to the water entry test device provided by the invention, the water entry posture of the tested object can be well adjusted.

Description

Technical Field

[0001] The present application belongs to the technical field of test devices, and in particular, relates to a water entry test device. Background Art

[0002] The water immersion test device is a device that can be used to collect the deformation of the liquid surface and the force on the object after the object enters the water. For example, the water immersion test device can often be used to collect the liquid surface splashing, the cavitation flow field of the liquid, and the water immersion load of the object after the object enters the water.

[0003] However, in the existing water entry test device, it is often impossible to conveniently adjust the water entry posture of the object to be tested, resulting in low working efficiency of the water entry test device. Summary of the invention

[0004] The embodiment of the present application provides a water entry test device, which is intended to better adjust the water entry posture of the object being tested.

[0005] In a first aspect, an embodiment of the present application provides a water entry test device, comprising: a water tank, the water tank having a accommodating space, and an opening connected to the accommodating space is provided on one side of the water tank in a first direction; a guide rail, arranged on the peripheral side of the water tank, and at least part of the guide rail protrudes from the water tank in a direction from the accommodating space to the opening; a connecting structure, comprising a first connecting component connected to the guide rail and a pan / tilt connected to the first connecting component toward one side of the water tank, and the first connecting component is movably arranged relative to the guide rail along the first direction.

[0006] According to the implementation of the first aspect of the present application, the gimbal includes at least one of a three-dimensional gimbal and a spherical gimbal.

[0007] According to any of the aforementioned embodiments of the first aspect of the present application, the first connecting component includes a first connecting member, which is connected to the guide rail and is movably arranged relative to the guide rail along a first direction, and the first connecting member is arranged to protrude from the guide rail on a side close to the water tank in a second direction, and the pan / tilt head is located on a side of the first connecting member facing the water tank, wherein the first direction intersects with the second direction.

[0008] According to any of the aforementioned embodiments of the first aspect of the present application, the first connecting component also includes a second connecting member and a third connecting member, the second connecting member is arranged on the side of the first connecting member facing the water tank, the second connecting member is provided with a plurality of first connecting holes spaced apart in the first direction, the third connecting member is connected to the second connecting member through the first connecting holes, and the gimbal is connected to the side of the third connecting member facing the water tank.

[0009] According to any of the aforementioned embodiments of the first aspect of the present application, the connection structure also includes a fourth connecting member connected to the side of the pan-tilt head facing the water tank, the fourth connecting member is rod-shaped, and the fourth connecting member is used to connect to the object to be measured.

[0010] According to any of the aforementioned embodiments of the first aspect of the present application, the fourth connecting member has a first end and a second end relative to each other, the first end is connected to the pan-tilt head, and the second end is used to connect to the object to be measured, and the fourth connecting member is a telescopic rod, and the second end is movably arranged relative to the first end along the length direction of the fourth connecting member.

[0011] According to any of the aforementioned embodiments of the first aspect of the present application, the water entry test device also includes a first sensor arranged between any two components in the connecting structure, and the first sensor is used to detect the tension or pressure between the two components connected to the first sensor.

[0012] According to any of the aforementioned embodiments of the first aspect of the present application, the water entry test device also includes an auxiliary structure connected to the guide rail, and the auxiliary structure is detachably connected to the connecting structure, wherein the material of the connecting structure includes a metal material, and the auxiliary structure includes a first electromagnet; and / or the auxiliary structure includes a pushing member, and the pushing member is used to provide a pushing force to the connecting structure in a first direction toward one side of the water tank.

[0013] According to any of the aforementioned embodiments of the first aspect of the present application, the number of guide rails is at least two, and the connecting structure is connected to one of the guide rails.

[0014] According to any of the aforementioned embodiments of the first aspect of the present application, the water entry test device also includes a buffer assembly located between the water tank and the connecting structure in the first direction, the buffer assembly includes a fixed structure connected to the guide rail and an elastic member connected to the fixed structure on the side facing the connecting structure, and the material of the elastic member includes an elastic material.

[0015] According to any of the aforementioned embodiments of the first aspect of the present application, the water entry test device also includes a second sensor connected to the guide rail, the second sensor and the water tank are located on the same side of the connecting structure in the first direction, and the second sensor is used to detect the speed of the object under test.

[0016] According to any of the aforementioned embodiments of the first aspect of the present application, the material of the water tank includes a transparent material, and the water entry test device also includes a high-speed camera arranged on the periphery of the water tank.

[0017] According to any of the aforementioned embodiments of the first aspect of the present application, the water entry test device also includes a particle image velocimetry light source arranged on the side of the water tank away from the connecting structure, and the particle image velocimetry light source is used to emit a sheet of light to the water tank; and / or, the water entry test device also includes a backlight source arranged on the side of the water tank away from the high-speed camera.

[0018] An embodiment of the present application provides a water immersion test device comprising a water tank, a guide rail, and a connection structure. The water tank has a storage space, and the storage space can be used to store liquid. An opening connected to the storage space is provided on one side of the water tank in a first direction, and the object to be tested can enter the storage space through the opening to contact the liquid in the storage space.

[0019] The guide rail is arranged on the peripheral side of the water tank, and at least part of the guide rail protrudes from the water tank in the direction from the accommodating space to the opening. The guide rail can be used to fix other device structures of the water immersion test device and to guide the movement of other device structures of the water immersion test device. The connection structure can be used to connect with the object to be tested, and the connection structure includes a first connection component connected to the guide rail. By setting the first connection component to be movable along a first direction relative to the guide rail, the height of the first connection component can be adjusted by moving the first connection component along the first direction, thereby realizing the adjustment of the water immersion height of the object to be tested.

[0020] The connection structure also includes a pan-tilt head connected to the first connection component on the side facing the water tank. The pan-tilt head can be used to connect to the object to be measured, so that when the object to be measured is connected to the pan-tilt head, there is no need to disassemble the object to be measured. The water entry posture of the object to be measured can be adjusted by adjusting the angle or position of the pan-tilt head, thereby making it more convenient to adjust the water entry posture of the object to be measured through line of sight, thereby greatly improving the working efficiency of the water entry test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of the structure of a water entry test device according to some embodiments of the present application;

[0023] Figure 2 It is a partially enlarged schematic diagram of a water entry test device according to some embodiments of the present application;

[0024] Figure 3 It is a partially enlarged schematic diagram of a buffer component in a water entry test device according to some embodiments of the present application.

[0025] Description of reference numerals:

[0026] 10. Water entry test device;

[0027] 100, water tank; 110, accommodation space; 120, opening;

[0028] 200, guide rail;

[0029] 300, connection structure; 310, first connection assembly; 311, first connection member; 311a connection member body; 311b, sliding member; 312, second connection member; 313, third connection member; 320, pan / tilt; 330, fourth connection member; 331, first end; 332, second end;

[0030] 400, first sensor;

[0031] 500, auxiliary structure; 510, first electromagnet; 520, pushing member; 521, air pump;

[0032] 600, buffer assembly; 610, fixing structure; 620, elastic member;

[0033] 700, second sensor; 710, transmitter; 720, receiver;

[0034] 800, high-speed camera;

[0035] 900. Light source for particle image velocimetry;

[0036] 20. Object to be measured;

[0037] H1, first connecting hole; H2, second connecting hole;

[0038] B, base; B1, first support member; B2, second support member;

[0039] C, control system; C1, computer; C2, data acquisition device;

[0040] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0041] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended only to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0042] It should be noted that, in this article, unless otherwise specified, the meaning of "multiple" is more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0043] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the embodiments of the present application. In the description of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0044] The water immersion test device is a device that can be used to collect the deformation of the liquid surface and the force on the object after the object enters the water. For example, the water immersion test device can often be used to collect the liquid surface splashing, the cavitation flow field of the liquid, and the water immersion load of the object after the object enters the water.

[0045] However, the applicant has found that in the existing water immersion test device, it is often not possible to conveniently adjust the water immersion posture of the object to be tested, resulting in low working efficiency of the water immersion test device. For example, in the existing water immersion test device, there is often no device for adjusting the water immersion posture of the object to be tested, and it is often necessary to adjust the water immersion posture of the object to be tested by adjusting the connection position between the water immersion test device and the object to be tested. Specifically, if it is necessary to adjust the water immersion posture of the object to be tested, it is often necessary to remove the object to be tested and readjust the connection position between the object to be tested and the water immersion test device to adjust the water immersion posture of the object to be tested. Therefore, the working efficiency of the existing water immersion test device is relatively low.

[0046] In order to solve the above technical problems, the present application is provided. In order to better understand the present application, the water entry test device of the present application embodiment is described in detail below in conjunction with the accompanying drawings.

[0047] Figure 1 This is a schematic diagram of the structure of a water entry test device 10 according to some embodiments of the present application. Figure 2 The diagram is a partially enlarged schematic diagram of a water entry test device 10 of some embodiments of the present application. The X direction in the diagram is a first direction, and the Y direction in the diagram is a second direction. The first direction X intersects with the second direction Y. For example, the first direction X and the second direction Y may be perpendicular.

[0048] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a water entry test device 10, comprising: a water tank 100, the water tank 100 having a accommodating space 110, and an opening 120 communicating with the accommodating space 110 is opened on one side of the water tank 100 in a first direction X; a guide rail 200, arranged on the peripheral side of the water tank 100, and at least a portion of the guide rail 200 protrudes from the water tank 100 in a direction from the accommodating space 110 to the opening 120; a connecting structure 300, comprising a first connecting component 310 connected to the guide rail 200 and a pan / tilt head 320 connected to the first connecting component 310 toward a side of the water tank 100, and the first connecting component 310 is movably arranged relative to the guide rail 200 along the first direction X.

[0049] The embodiment of the present application provides a water entry test device 10, which includes a water tank 100, a guide rail 200, and a connection structure 300. The water tank 100 has a receiving space 110, and the receiving space 110 can be used to receive liquid.

[0050] Optionally, the type of liquid contained in the water tank 100 can be selected according to different water immersion test requirements. Exemplarily, the containing space 110 can be used to contain liquids such as water or oil that need to contact the object under test 20 during the test.

[0051] An opening 120 communicating with the containing space 110 is formed on one side of the water tank 100 in the first direction X. The object 20 to be measured can enter the containing space 110 through the opening 120 to contact the liquid in the containing space 110 .

[0052] Optionally, the first direction X may be a direction parallel to the direction of gravity. During the operation of the water immersion test device 10 , the object 20 may enter the containing space 110 through the opening 120 under the action of gravity to contact the liquid in the containing space 110 .

[0053] Optionally, the object 20 to be measured may be a slender rotating body, a ship, a spacecraft, an airplane or a human model, or the object 20 to be measured may be various scaled models such as a slender rotating body, a ship, a spacecraft, an airplane or a human model, so as to facilitate processing and customization of parameters such as the quality and appearance of the object 20 to be measured.

[0054] The guide rail 200 is arranged on the peripheral side of the water tank 100, and at least part of the guide rail 200 protrudes from the water tank 100 in the direction from the accommodating space 110 to the opening 120. The guide rail 200 can be used to fix other device structures of the water immersion test device 10 and to guide the movement of other device structures of the water immersion test device 10.

[0055] Optionally, the guide rail 200 may be rod-shaped and extend along the first direction X, so that at least a portion of the guide rail 200 protrudes from the water tank 100 along a direction from the accommodating space 110 to the opening 120 .

[0056] The connecting structure 300 can be used to connect with the object under test 20. The connecting structure 300 includes a first connecting component 310 connected to the guide rail 200. The first connecting component 310 is movable along the first direction X relative to the guide rail 200, so that the height of the first connecting component 310 can be adjusted by moving the first connecting component 310 along the first direction X, thereby achieving the adjustment of the water immersion height of the object under test 20, and further achieving the adjustment of the water immersion depth of the object under test 20.

[0057] Optionally, the position of the guide rail 200 relative to the water tank 100 may be fixed, for example, the guide rail 200 may be fixedly connected to the water tank 100. The first connecting assembly 310 may move along the first direction X relative to the guide rail 200, so that the first connecting assembly 310 may move away from the water tank 100 along the first direction X to facilitate the installation of the object 20 to be measured and the adjustment of the water immersion height of the object 20 to be measured, and the first connecting assembly 310 may move close to the water tank 100 along the first direction X to implement the water immersion test of the object 20 to be measured.

[0058] Optionally, one of the first connecting component 310 and the guide rail 200 may have a slide groove (not shown in the figure) and the other may have a slider, and the slider and the slide groove may slide relative to each other in the first direction X, so that the guide rail 200 can better guide the movement of the first connecting component 310, so as to facilitate the movement of the first connecting component 310 in the first direction X relative to the guide rail 200.

[0059] For example, Figure 2As shown, the first connection component 310 may at least partially cover the guide rail 200, so that the first connection component 310 may be formed with a slide groove, the guide rail 200 itself may serve as a slider, and the slide groove may slide relative to the slide rail along the first direction X. Or for example, the guide rail 200 may be provided with a slide groove extending along the first direction X, and the first connection component 310 may be provided with a slider, and the slider may slide relative to the slide groove along the first direction X.

[0060] Optionally, when the first connecting component 310 is provided with a slide groove and the guide rail 200 itself serves as a slider, the side of the guide rail 200 facing away from the gimbal 320 may not be covered by the first connecting component 310, so that other device structures of the water immersion test device 10 can be connected to the guide rail 200 through the exposed surface of the side of the guide rail 200 facing away from the gimbal 320.

[0061] For ease of description, the following embodiments are described by taking "the first connecting component 310 is provided with a slide groove, and the guide rail 200 itself can be used as a slide block" as an example.

[0062] The connection structure 300 also includes a pan-tilt head 320 connected to the first connection component 310 toward the side of the water tank 100. The pan-tilt head 320 can be used to connect to the object under test 20, so that when the object under test 20 is connected to the pan-tilt head 320, there is no need to disassemble the object under test 20. The water entry posture of the object under test 20 can be adjusted by adjusting the angle or position of the pan-tilt head 320, so that the water entry posture of the object under test 20 can be adjusted more conveniently through line of sight, thereby greatly improving the working efficiency of the water entry test device 10.

[0063] Optionally, the pan-tilt platform 320 can be used to connect with the object under test 20, which can refer to that the pan-tilt platform 320 can be directly connected with the object under test 20. Alternatively, the pan-tilt platform 320 can be used to connect with the object under test 20, which can refer to that the pan-tilt platform 320 can be indirectly connected with the object under test 20, for example, the pan-tilt platform 320 can be connected with the object under test 20 through other devices. Among them, since the pan-tilt platform 320 is arranged on the side of the first connecting component 310 facing the water tank 100, and the pan-tilt platform 320 can be used to connect with the object under test 20, when adjusting the entry posture of the object under test 20, it can be less affected by the installation errors between the various components in the first connecting component 310, and the entry posture of the object under test 20 can be adjusted more accurately.

[0064] In the embodiment of the present application, there are many types of gimbals 320 , and the gimbal 320 may be any type of gimbal 320 that can be used to adjust the entry posture of the object 20 under test.

[0065] Exemplarily, the gimbal 320 may include at least one of a three-dimensional gimbal 320 and a spherical gimbal 320 .

[0066] In some optional embodiments, the first connecting component 310 includes a first connecting member 311, which is connected to the guide rail 200 and is movably arranged relative to the guide rail 200 along a first direction X, and the first connecting member 311 is protruded from the guide rail 200 toward a side close to the water tank 100 in a second direction Y, and the pan-tilt head 320 is located on a side of the first connecting member 311 facing the water tank 100.

[0067] Optionally, the first connecting member 311 may include a connecting member body 311a protruding from the guide rail 200 toward the side close to the water tank 100 in the second direction Y and a sliding member 311b arranged on the connecting member body 311a facing the side of the guide rail 200, and the sliding member 311b may at least partially cover the guide rail 200 to form a slide groove.

[0068] Optionally, the connector body 311a may be in an "L" shape, that is, for example, a portion of the connector body 311a may be extended and formed along the first direction X, and another portion of the connector body 311a may be extended and formed along the second direction Y to protrude from the guide rail 200 toward the side close to the water tank 100 in the second direction Y. The connector body 311a extended and formed along the first direction X can facilitate the size of the sliding member 311b in the first direction X, so as to better enhance the guiding effect of the guide rail 200 on the movement of the first connecting component 310, thereby better improving the stability of the first connecting component 310 when it moves relative to the guide rail 200.

[0069] In these optional embodiments, by providing a first connecting member 311 protruding from the guide rail 200 on the side close to the water tank 100 in the second direction Y, when the object under test 20 is connected to the connecting structure 300, the object under test 20 can be better away from the guide rail 200 and better located above the center of the water tank 100, so that the object under test 20 can enter the water from a relatively central position of the liquid surface, which can facilitate a relatively complete observation of the liquid surface splashing and the cavitation flow field of the liquid after the object under test 20 enters the water.

[0070] In some optional embodiments, the first connecting component 310 also includes a second connecting member 312 and a third connecting member 313. The second connecting member 312 is arranged on the side of the first connecting member 311 facing the water tank 100. The second connecting member 312 is provided with a plurality of first connecting holes H1 spaced apart in the first direction X. The third connecting member 313 is connected to the second connecting member 312 through the first connecting holes H1, and the pan-tilt head 320 is connected to the side of the third connecting member 313 facing the water tank 100.

[0071] Optionally, the third connecting member 313 may be connected to the first connecting hole H1 via a fixing member such as a bolt or a latch, so as to achieve connection between the third connecting member 313 and the second connecting member 312 .

[0072] Optionally, the second connecting member 312 may be "L" shaped, that is, for example, a portion of the second connecting member 312 may be extended along the second direction Y and used to be directly or indirectly connected to the first connecting member 311, and another portion of the second connecting member 312 may extend along the first direction X, and the first connecting hole H1 is on the portion of the second connecting member 312 extending along the first direction X.

[0073] Optionally, the third connecting member 313 may be "L" shaped, that is, for example, a portion of the third connecting member 313 may be extended along the first direction X and used to be directly or indirectly connected to the second connecting member 312 through the first connecting hole H1, and another portion of the second connecting member 312 may extend along the second direction Y and used to be directly or indirectly connected to the gimbal 320.

[0074] In these optional embodiments, by opening a plurality of first connecting holes H1 spaced apart in the first direction X on the second connecting member 312, the third connecting member 313 can be connected to the first connecting holes H1 with different heights in the first direction X, so that the height of the third connecting member 313 in the first direction X can be adjusted before the object to be measured 20 enters the water, thereby enabling the adjustment of the height of the object to be measured 20 entering the water.

[0075] In some optional embodiments, the connection structure 300 further includes a fourth connection member 330 connected to the side of the pan / tilt head 320 facing the water tank 100 , and the fourth connection member 330 is rod-shaped and is used to connect to the object under test 20 .

[0076] Optionally, when the object under test 20 is connected to the connection structure 300 , the fourth connection member 330 may be connected to a side of the object under test 20 that is away from the water tank 100 in the first direction X.

[0077] Optionally, during the operation of the water immersion test device 10, the tilt angle of the fourth connecting member 330 or its relative position with the water tank 100 can be adjusted by rotating or moving the pan / tilt head 320, thereby adjusting the water immersion posture of the object 20 connected to the fourth connecting member 330.

[0078] In this optional embodiment, by providing the fourth connecting member 330, during the operation of the water immersion test device 10, when at least part of the connecting structure 300 falls together with the object to be tested 20, the fourth connecting member 330 which is rod-shaped and connected to the side of the object to be tested 20 away from the water tank 100 in the first direction X is not easy to affect the deformation of the liquid surface, that is, the fourth connecting member 330 is not easy to generate noise influence on the splashing of the liquid surface and the change of the cavitation flow field when the object to be tested 20 contacts the liquid in the water tank 100, which can greatly improve the working accuracy of the water immersion test device 10.

[0079] In some optional embodiments, the fourth connecting member 330 has a first end 331 and a second end 332 relative to each other, the first end 331 is connected to the pan-tilt head 320, and the second end 332 is used to connect to the object under test 20. The fourth connecting member 330 is a telescopic rod, and the second end 332 is movably arranged relative to the first end 331 along the length direction of the fourth connecting member 330.

[0080] Optionally, the length direction of the fourth connecting member 330 may be a direction from the first end 331 to the second end 332 or a direction from the second end 332 to the first end 331 .

[0081] Optionally, the fourth connecting member 330 may be a telescopic rod of a sleeve type. For example, the fourth connecting member 330 may include a plurality of sleeves of different sizes and sleeved with each other, and adjacent sleeves may move relative to each other along the length direction of the fourth connecting member 330 .

[0082] In these optional embodiments, by setting the fourth connecting member 330 as a telescopic rod, the height of the object 20 under test 20 entering the water can be adjusted by adjusting the length of the fourth connecting member 330. Exemplarily, during the operation of the water entry test device 10, after adjusting the inclination angle of the fourth connecting member 330 or the relative position with the water tank 100 by rotating or moving the pan-tilt 320, that is, after adjusting the water entry posture of the object 20 under test, the height of the object 20 under test 20 entering the water can be adjusted by adjusting the length of the fourth connecting member 330, so that the water entry test of the object 20 under test meets the test requirements. In addition, the setting of the fourth connecting member 330 makes it possible to adjust the height of the object 20 under test 20 under test to be less affected by the installation errors between the first connecting assembly 310 and the pan-tilt 320 when adjusting the height of the object 20 under test, and the height of the object 20 under test can be adjusted more accurately.

[0083] In some optional embodiments, the water entry test device 10 further includes a first sensor 400 disposed between any two components in the connection structure 300 , and the first sensor 400 is used to detect tension or pressure between two components connected to the first sensor 400 .

[0084] Optionally, two components in the connection structure 300 connected to the first sensor 400 may be indirectly connected via the first sensor 400 .

[0085] Exemplarily, the first sensor 400 may be disposed between the first connecting member 311 and the second connecting member 312, and the first connecting member 311 and the second connecting member 312 may be indirectly connected through the first sensor 400. For example, one end of the first sensor 400 in the first direction X may be connected to the first connecting member 311, and the other end of the first sensor 400 in the first direction X may be connected to the second connecting member 312.

[0086] Optionally, the first sensor 400 may include at least one of a tension and compression sensor, an acceleration sensor, and a pressure sensor.

[0087] In these optional embodiments, by providing a first sensor 400 for detecting the tension or pressure between two components connected to the first sensor 400 , it is possible to facilitate the detection of the water entry load of the object 20 under test during the operation of the water entry test device 10 .

[0088] In some optional embodiments, the water immersion test device 10 also includes an auxiliary structure 500 connected to the guide rail 200, and the auxiliary structure 500 is detachably connected to the connecting structure 300, wherein the material of the connecting structure 300 includes a metal material, and the auxiliary structure 500 includes a first electromagnet 510; and / or the auxiliary structure 500 includes a pushing member 520, and the pushing member 520 is used to provide a pushing force to the connecting structure 300 in the first direction X toward one side of the water tank 100.

[0089] Optionally, the pushing member 520 may be used to spray a medium toward the connection structure 300 to provide a pushing force in the first direction X toward one side of the water tank 100 to the connection structure 300 .

[0090] For example, the medium may be gas or liquid. For example, the pusher 520 may include an air pump 521 and an air nozzle connected to the air pump 521, the air nozzle may be located on a side of the connection structure 300 away from the water tank 100 in the first direction X, and the air pump 521 may spray gas to the connection structure 300 through the air nozzle to provide a driving force to the connection structure 300 in the first direction X toward one side of the water tank 100.

[0091] In these optional embodiments, the auxiliary structure 500 detachably connected to the connecting structure 300 can be used to temporarily fix the connecting structure 300 so as to temporarily fix the object under test 20 at a certain height during the operation of the water immersion test device 10, and the auxiliary structure 500 can also be used to release the connecting structure 300 so as to release the object under test 20 during the operation of the water immersion test device 10. Exemplarily, when the material of the connecting structure 300 includes a metal material, and the auxiliary structure 500 includes a first electromagnet 510, the first electromagnet 510 can be controlled to have a magnetic force to adsorb the connecting structure 300 to achieve temporary fixation of the connecting structure 300. Then, after the water entry posture and water entry height of the object to be measured 20 are adjusted, the magnetic force of the first electromagnet 510 is controlled to be reduced (for example, the magnetic force of the first electromagnet 510 is controlled to be zero) so that the first electromagnet 510 cannot adsorb and fix the connecting structure 300, so as to achieve the release of the connecting structure 300, so that the connecting structure 300 can fall toward the water tank 100 along the guide rail 200 together with the object to be measured 20, thereby achieving the control of fixation and release of the object to be measured 20.

[0092] By providing a pushing member 520 for providing a pushing force to the connecting structure 300 in the first direction X toward one side of the water tank 100, at the moment of releasing the connecting structure 300, the pushing member 520 can be controlled to provide a pushing force to the connecting structure 300 in the first direction X toward one side of the water tank 100, so that the connecting structure 300 can have a larger initial velocity, so that the water immersion test device 10 can also collect the deformation of the liquid surface and the force on the object 20 after the object 20 enters the water for a higher speed working condition, so that the water immersion test device 10 can have a better working ability.

[0093] In some embodiments of the present application, in addition to the aforementioned release of the object to be measured 20 by controlling the auxiliary structure 500 so that the object to be measured 20 can fall toward the water tank 100 along the guide rail 200 together with the connecting structure 300, a second electromagnet (not shown in the figure) can be added between any two components in the connecting structure 300 to enable the object to be measured 20 to be less susceptible to the influence of the guide rail 200 and perform free fall motion.

[0094] As an example, a second electromagnet can be set between the first connecting member 311 and the second connecting member 312, so that the second electromagnet can be controlled to have magnetic force to adsorb the second connecting member 312 to temporarily fix the second connecting member 312, and then after the water entry posture and water entry height of the object 20 to be measured are adjusted, the magnetic force of the second electromagnet is controlled to be reduced (for example, the magnetic force of the second electromagnet is controlled to be zero) so that the second electromagnet cannot adsorb and fix the second connecting member 312, so as to release the second connecting member 312 and the object 20 to be measured, so that the second connecting member 312 and the object 20 to be measured can perform free fall motion, thereby realizing the water entry test when the object 20 to be measured is in free fall motion.

[0095] Optionally, when the water immersion test device 10 includes both a first sensor 400 and a second electromagnet, the first sensor 400 may be located on a side of the second electromagnet close to the water tank 100, so that when the object to be measured 20 is released by controlling the second electromagnet, the first sensor 400 may fall into the water tank 100 together with the object to be measured 20, so that the first sensor 400 can still work well.

[0096] Exemplarily, when the first sensor 400 and the second electromagnet are simultaneously arranged between the first connecting member 311 and the second connecting member 312, the second electromagnet can be arranged between the first sensor 400 and the first connecting member 311, so that when the object to be measured 20 is released by controlling the second electromagnet, the first sensor 400, the second connecting member 312 and the object to be measured 20 can fall toward the water tank 100 together, so that the first sensor 400 can still work well.

[0097] In some optional embodiments, the guide rail 200 may be provided with a plurality of second connection holes H2 spaced apart in the first direction X, and the auxiliary structure 500 may be connected to the guide rail 200 through the second connection holes H2.

[0098] Optionally, the auxiliary structure 500 may be connected to the second connection hole H2 via a fixing member such as a bolt or a latch, so as to achieve connection between the auxiliary structure 500 and the guide rail 200 .

[0099] In these optional embodiments, by providing a plurality of second connecting holes H2 spaced apart in the first direction X on the guide rail 200, the auxiliary structure 500 can be connected to the second connecting holes H2 with different heights in the first direction X, so that the height of the auxiliary structure 500 in the first direction X can be adjusted before releasing the object to be measured 20, thereby enabling the adjustment of the height of the object to be measured 20 entering the water.

[0100] In some optional embodiments, the number of the guide rails 200 is at least two, and the connecting structure 300 is connected to one of the guide rails 200 .

[0101] Optionally, the number of the guide rails 200 is two, and the two guide rails 200 may be disposed on both sides of the water tank 100 in the second direction Y, and the connecting structure 300 may be connected to one of the two guide rails 200 .

[0102] In these optional embodiments, by setting the number of guide rails 200 to be at least two, it is possible to facilitate installation of other device structures in the water immersion test device 10 onto the guide rails 200 , thereby facilitating the arrangement of other device structures in the water immersion test device 10 .

[0103] By setting the connecting structure 300 to be connected to only one guide rail 200 among the guide rails 200, when a problem occurs with the guide rail 200 connected to the connecting structure 300, for example, when the connecting structure 300 cannot slide well with the connected guide rail 200 along the first direction X, the connecting structure 300 can be replaced to be connected with other guide rails 200, so that the connecting structure 300 can slide well with other good guide rails 200, thereby better improving the working fault tolerance of the water entry test device 10.

[0104] Figure 3 It is a partially enlarged schematic diagram of the buffer assembly 600 in the water entry test device 10 of some embodiments of the present application.

[0105] like Figure 3As shown, in some optional embodiments, the water immersion test device 10 also includes a buffer assembly 600 located between the water tank 100 and the connecting structure 300 in the first direction X, and the buffer assembly 600 includes a fixed structure 610 connected to the guide rail 200 and an elastic member 620 connected to the fixed structure 610 facing the connecting structure 300, and the material of the elastic member 620 includes an elastic material.

[0106] Optionally, the fixing structure 610 can be connected to the guide rail 200 through the second connection hole H2. Exemplarily, the fixing structure 610 can be connected to the second connection hole H2 through a fixing member such as a bolt or a latch to achieve the connection between the fixing structure 610 and the guide rail 200.

[0107] Optionally, there are many types of configurations of the elastic member 620. Exemplarily, the elastic member 620 may include at least one of a buffer damper, a spring, and an air cushion.

[0108] In these optional embodiments, after releasing the object to be measured 20 by releasing the connecting structure 300, for example, after completing the collection of the liquid surface splashing condition, the liquid cavitation flow field condition and the water entry load condition of the object to be measured 20 after entering the water, the connecting structure 300 can come into contact with the elastic member 620. Under the buffering of the elastic member 620, the connecting structure 300 and the object to be measured 20 can be better decelerated, and the vibration after the collision between the connecting structure 300 and the buffer assembly 600 can be better absorbed, which can better improve the structural stability and working reliability of the water entry test device 10.

[0109] In some optional embodiments, the water immersion test device 10 further includes a second sensor 700 connected to the guide rail 200 . The second sensor 700 and the water tank 100 are located on the same side of the connection structure 300 in the first direction X. The second sensor 700 is used to detect the speed of the object 20 under test.

[0110] Optionally, the second sensor 700 may include a speed sensor. For example, the second sensor 700 may include a photoelectric speed sensor.

[0111] Exemplarily, the second sensor 700 may include two sets of transmitters 710 and receivers 720, wherein the transmitter 710 may be used to transmit laser light to the receiver 720, and the receiver 720 may be used to detect the laser light transmitted by the transmitter 710. The distance between the two sets of transmitters and receivers 720 in the first direction X is D, and the difference between the time when one set of receivers 720 detects the instant when the laser light is disconnected and the time when the other set of receivers 720 detects the instant when the laser light is disconnected is ΔT. Therefore, the speed V of the object 20 measured by the second sensor 700 may satisfy: V=D / ΔT. When both D and ΔT are small, it can be considered that V is approximately equal to the actual speed of the object 20.

[0112] In these optional embodiments, when the water tank 100 contains liquid, the second sensor 700 can be arranged near the liquid surface, so that the second sensor 700 can better detect the speed at which the object 20 enters the water.

[0113] In some optional embodiments, the material of the water tank 100 includes a transparent material, and the water immersion test device 10 further includes a high-speed camera 800 disposed on the periphery of the water tank 100 .

[0114] Optionally, the material of the water tank 100 may include at least one of glass and transparent plastic.

[0115] Optionally, when the water tank 100 contains liquid, the principal point of the high-speed camera 800 can be flush with the liquid surface, that is, the principal point of the high-speed camera 800 can be at the same height as the liquid surface in the first direction X, so as to facilitate the high-speed camera 800 to capture the changes in the liquid surface.

[0116] In these optional embodiments, the high-speed camera 800 can be used to capture the deformation process of the liquid surface when the object 20 enters the water, so as to collect the liquid surface splashing and cavitation flow field conditions of the liquid after the object 20 enters the water.

[0117] In some optional embodiments, the water entry test device 10 also includes a particle image velocimetry (PIV) light source disposed on the side of the water tank 100 away from the connecting structure 300, and the particle image velocimetry light source 900 is used to emit a sheet of light to the water tank 100; and / or, the water entry test device 10 also includes a backlight source (not shown in the figure) disposed on the side of the water tank 100 away from the high-speed camera 800.

[0118] Optionally, the water immersion test device 10 also includes a base B arranged on the side of the water tank 100 away from the pan-tilt head 320 in the first direction X. The base B may include a first support member B1 and a second support member B2 arranged on the side of the first support member B1 away from the water tank 100 in the first direction X. The first support member B1 can be used to support the water tank 100, and the second support member B2 can be used to support the particle image velocimetry light source 900.

[0119] Optionally, the material of the first support member B1 may include a transparent material, and / or the first support member B1 may have a yield opening (not shown in the figure) to reduce the obstruction of the first support member B1 to the light emitted by the particle image velocimetry light source 900, thereby facilitating the particle image velocimetry light source 900 to emit a sheet of light to the water tank 100.

[0120] Optionally, the side of the base B away from the water tank 100 in the first direction X may be provided with wheels to facilitate the movement of the base B and the device structure carried thereon. Exemplarily, the side of the base B away from the water tank 100 in the first direction X may be provided with a load-bearing Forma wheel.

[0121] In these optional embodiments, a particle image velocimetry light source 900 for emitting a sheet of light to the water tank 100 is provided on a side of the water tank 100 away from the connecting structure 300, or a backlight source is provided on a side of the water tank 100 away from the high-speed camera 800, so that before releasing the object to be measured 20, the fluorescent tracer particles required for velocity measurement using particle image velocimetry can be first spread in the liquid in the water tank 100, so that after the object to be measured 20 is released and the object to be measured 20 enters the water, the flow field condition of the liquid in the water tank 100 can be collected by the sheet of light emitted by the particle image velocimetry light source 900 to the water tank 100 and the high-speed camera 800, or the flow field condition of the liquid in the water tank 100 can be collected by the backlight source and the high-speed camera 800, thereby facilitating the water entry test device 10 to collect the liquid surface splashing condition and cavitation flow field condition of the liquid after the object to be measured 20 enters the water.

[0122] In some optional embodiments, the water entry test device 10 may also include a control system C, which can be used to control the operation of the first sensor 400, the second sensor 700, the first electromagnet 510, the second electromagnet, the pusher 520, the high-speed camera 800 and the particle image velocimetry light source 900 in any of the aforementioned embodiments, and to collect data collected and obtained by the first sensor 400, the second sensor 700 and the high-speed camera 800 in any of the aforementioned embodiments.

[0123] Exemplarily, the control system C may include a computer C1 and a data acquisition device C2. The computer C1 may be directly electrically connected to the first sensor 400, the second sensor 700, the first electromagnet 510, the second electromagnet, the pusher 520, the high-speed camera 800 and the particle image velocimetry light source 900 in any of the aforementioned embodiments, or the computer C1 may be electrically connected to the first sensor 400, the second sensor 700, the first electromagnet 510, the second electromagnet, the pusher 520, the high-speed camera 800 and the particle image velocimetry light source 900 in any of the aforementioned embodiments through the data acquisition device C2.

[0124] As a workflow diagram of a water entry test device 10, the height of the auxiliary structure 500 on the guide rail 200 can be adjusted first to preliminarily adjust the water entry height of the object 20 to be tested. Then, the object 20 to be tested is installed with the fourth connecting member 330, and the pan / tilt 320 is rotated or moved to adjust the water entry posture of the object 20 to be tested. Then, the water entry height of the object 20 to be tested can be adjusted by adjusting the height of the third connecting member 313 and the length of the fourth connecting member 330. Then, the control system C, the first sensor 400, the second sensor 700, the high-speed camera 800 and the particle image velocimetry light source 900 can be turned on, and fluorescent tracer particles can be sown in the liquid in the water tank 100.

[0125] Before releasing the object 20 to be measured, the dynamic friction and vibration generated by the movement between the connecting structure 300 and the slide rail can be simulated by the control system C. At this time, the first sensor 400 can collect an initial value.

[0126] Then, the control system C can be used to control the magnetic force of the first electromagnet 510 to be reduced, so that the first electromagnet 510 is powered off, so that the connecting structure 300 can descend along the slide rail together with the object to be measured 20 .

[0127] After the object 20 enters the water, the second sensor 700 can collect the water entry speed of the object 20, the first sensor 400 can collect the water entry value, the control system C can obtain the water entry load of the object 20 more accurately by comparing the water entry value with the initial value and simulating the dynamic friction and vibration effect generated by the movement between the connecting structure 300 and the slide rail, and the high-speed camera 800 can cooperate with the particle image velocimetry light source 900 and the fluorescent tracer particles to capture the liquid surface splash and cavitation flow field of the liquid after the object 20 enters the water, thereby realizing quantitative non-contact measurement of water entry. The water entry test device 10 provided in the embodiment of the present application is simple to operate and has a high degree of automation, which can facilitate rapid testing by a single person in a short period of time.

[0128] In some embodiments of the present application, during the operation of the water immersion test device 10 , the first sensor 400 can operate in a variety of ways.

[0129] In some optional embodiments, before releasing the object under test 20, the initial value F1 collected by the first sensor 400 may satisfy: F1=G1+G2, wherein G1 may be the total weight of the connecting structure 300 below the first sensor 400. For example, when the first sensor 400 is disposed between the first connecting member 311 and the second connecting member 312, G1 may be the sum of the weights of the second connecting member 312, the third connecting member 313, the fourth connecting member 330 and the pan-tilt head 320; G2 may be the weight of the object under test 20.

[0130] After the object 20 enters the water, the water entry value F2 collected by the first sensor 400 may satisfy: F2=G1+G2+F3+F4, wherein F3 may be the buoyancy of the object 20, and F4 may be the impact force of the object 20 entering the water. Since F3 may be obtained by calculation, only F4 is an unknown quantity, and the water entry load of the object 20 may be obtained by the difference method.

[0131] The directions of F3 and F4 may be the same, and the directions of F3 and F4 may be opposite to the directions of G1 and G2. Therefore, F3 and F4 may be positive numbers, and G1 and G2 may be negative numbers; or, F3 and F4 may be negative numbers, and G1 and G2 may be positive numbers.

[0132] In other optional embodiments, before releasing the object to be measured 20, the first sensor 400 may first clear the total weight of the connecting structure 300 below the first sensor 400 and the weight of the object to be measured 20. For example, when the first sensor 400 is disposed between the first connecting member 311 and the second connecting member 312, the first sensor 400 may first clear the total weight of the second connecting member 312, the third connecting member 313, the fourth connecting member 330, the pan-tilt head 320 and the object to be measured 20, so that the initial value F1 collected by the first sensor 400 is zero.

[0133] After the object 20 enters the water, the water entry value F2 collected by the first sensor 400 may satisfy: F2=F3+F4, wherein F3 may be the buoyancy of the object 20, and F4 may be the impact force of the object 20 entering the water. Since F3 may be obtained by calculation, only F4 is an unknown quantity, and the water entry load of the object 20 may be obtained by the difference method.

[0134] The directions of F3 and F4 may be the same, and the directions of F3 and F4 may be opposite to the directions of G1 and G2. Therefore, F3 and F4 may be positive numbers; or, F3 and F4 may be negative numbers.

[0135] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A water entry test device, characterized in that: include: A water tank, wherein the water tank has a storage space, and an opening communicating with the storage space is formed on one side of the water tank in the first direction; A guide rail is arranged on the peripheral side of the water tank, and at least a part of the guide rail protrudes from the water tank in a direction from the accommodating space to the opening; The connection structure includes a first connection component connected to the guide rail and a pan head connected to the first connection component facing the water tank side, and the first connection component is movably arranged relative to the guide rail along the first direction.

2. The water entry test device according to claim 1, characterized in that: The gimbal includes at least one of a three-dimensional gimbal and a spherical gimbal.

3. The water entry test device according to claim 1, characterized in that: The first connecting assembly includes a first connecting member, the first connecting member is connected to the guide rail and is movably arranged relative to the guide rail along the first direction, and the first connecting member is protruding from the guide rail toward a side close to the water tank in the second direction, and the pan / tilt head is located on a side of the first connecting member facing the water tank. The first direction intersects with the second direction.

4. The water entry test device according to claim 3, characterized in that: The first connecting component also includes a second connecting member and a third connecting member. The second connecting member is arranged on the side of the first connecting member facing the water tank. The second connecting member is provided with a plurality of first connecting holes spaced apart in the first direction. The third connecting member is connected to the second connecting member through the first connecting holes. The pan-tilt head is connected to the side of the third connecting member facing the water tank.

5. The water entry test device according to claim 1, characterized in that: The connection structure also includes a fourth connection member connected to the side of the pan / tilt head facing the water tank, the fourth connection member is rod-shaped, and the fourth connection member is used to be connected to the object to be measured.

6. The water entry test device according to claim 5, characterized in that: The fourth connecting member has a first end and a second end opposite to each other, the first end is connected to the pan-tilt head, and the second end is used to connect to the object to be measured. The fourth connecting member is a telescopic rod, and the second end is movably arranged relative to the first end along the length direction of the fourth connecting member.

7. The water entry test device according to claim 1, characterized in that: The water entry test device further comprises a first sensor disposed between any two components in the connection structure, wherein the first sensor is used to detect the tension or pressure between the two components connected to the first sensor.

8. The water entry test device according to claim 1, characterized in that: The water entry test device further comprises an auxiliary structure connected to the guide rail, wherein the auxiliary structure is detachably connected to the connecting structure. Wherein, the material of the connecting structure includes metal material, and the auxiliary structure includes a first electromagnet; And / or, the auxiliary structure includes a pushing member, and the pushing member is used to provide a pushing force to the connecting structure in the first direction toward one side of the water tank.

9. The water entry test device according to claim 1, characterized in that: The number of the guide rails is at least two, and the connecting structure is connected to one of the guide rails.

10. The water entry test device according to claim 1, characterized in that: The water entry test device also includes a buffer assembly located between the water tank and the connecting structure in the first direction, the buffer assembly includes a fixed structure connected to the guide rail and an elastic member connected to the fixed structure on a side facing the connecting structure, and the material of the elastic member includes an elastic material.

11. The water entry test device according to claim 1, characterized in that: The water entry test device also includes a second sensor connected to the guide rail, the second sensor and the water tank are located on the same side of the connecting structure in the first direction, and the second sensor is used to detect the speed of the object being tested.

12. The water entry test device according to any one of claims 1 to 11, characterized in that: The material of the water tank includes a transparent material, and the water entry test device also includes a high-speed camera arranged on the periphery of the water tank.

13. The water entry test device according to claim 12, characterized in that: The water entry test device further comprises a particle image velocimetry light source disposed on a side of the water tank away from the connection structure, the particle image velocimetry light source being used to emit a sheet of light toward the water tank; And / or, the water immersion test device further includes a backlight source disposed on a side of the water tank away from the high-speed camera.

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