Vibration damping performance testing tool for vibration damping cable

Abstract

The utility model relates to the technical field of vibration reduction testing of underwater sensors, in particular to a vibration reduction performance testing tool for a vibration reduction cable. Comprising two mounting frames, a plurality of connecting rods are uniformly distributed between the two mounting frames, a fixing seat is arranged at the bottom of the mounting assembly, and the fixing seat is fixed on a vibration table; each connecting rod is connected with a to-be-tested vibration reduction strip, the other end of the to-be-tested vibration reduction strip is fixed with an underwater sensor, and the underwater sensor is provided with a first acceleration sensor; the first acceleration sensor is used for collecting vibration response data of the underwater sensor after the underwater sensor is subjected to vibration excitation; for to-be-tested vibration reduction strips of different materials and different lengths, the vibration reduction strip meeting the vibration reduction requirement of the underwater sensor is selected by comparing data acquired by the first sensor, and the stability of the sensor in work is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of underwater sensor vibration reduction testing technology, and in particular to a testing fixture for the vibration reduction performance of vibration-damping cables. Background Technology

[0002] With the increasing demand for marine resource development and hydrological monitoring, underwater sensors, as core equipment for acquiring marine environmental parameters, are crucial for the accuracy of data acquisition due to their stability.

[0003] Due to the complex and changeable marine environment, equipment is easily disturbed by wind, waves and currents, causing overload during data acquisition. In order to improve the accuracy of hydrological observation data acquisition, vibration reduction measures must be taken for the mounting method of underwater sensors. The vibration reduction performance of the vibration damping strips directly affects the data quality.

[0004] Currently, there is no relevant testing equipment for the vibration damping performance of flexible damping strips, so it is impossible to understand the vibration damping performance of the damping strips. Utility Model Content

[0005] To address the shortcomings of the existing technology, this utility model provides a testing fixture for the vibration reduction performance of vibration-damping cables that has a reasonable structural design and is easy to operate.

[0006] This utility model provides a testing fixture for the vibration reduction performance of vibration-damping cables, comprising:

[0007] The mounting components include two mounting frames, which are vertically spaced apart.

[0008] Multiple connecting rods are evenly distributed between the two mounting frames for connecting the two mounting frames.

[0009] A mounting base is disposed at the bottom of the mounting assembly and is fixed to the vibration table;

[0010] in,

[0011] Each of the connecting rods is connected to a vibration damping strip to be tested. The other end of the vibration damping strip to be tested is fixed to an underwater sensor. The underwater sensor is equipped with a first acceleration sensor.

[0012] The vibration of the vibration table is transmitted to the mounting assembly through the fixed base, and then to the damping strip through the connecting rod. After being damped by the damping strip, the vibration is transmitted to the underwater sensor. The first acceleration sensor is used to collect the vibration response data of the underwater sensor after being subjected to vibration excitation.

[0013] In this technical solution, the data collected by the first sensor is compared for vibration damping strips of different materials and lengths to be tested, and the vibration damping strip that meets the vibration damping requirements of the underwater sensor is selected to ensure the stability of the sensor during operation.

[0014] In some embodiments of this application, in order to obtain the vibration reduction performance of the test strip more accurately, it is necessary to consider the influence of the natural frequency of the test fixture. In one of the mounting frames, a second acceleration sensor is provided. The second acceleration sensor is used to collect the vibration response data of the test fixture after it is excited by the excitation force.

[0015] A third acceleration sensor is installed on the fixed base. The third acceleration sensor is used to collect the excitation force output data of the vibrator. By processing the data from the second acceleration sensor and the third acceleration sensor, the natural frequency of the test fixture is obtained.

[0016] In some embodiments of this application, the mounting frame is a square frame structure, the planes on which the two mounting frames are located are parallel to each other, and mounting grooves are respectively opened at the top corners of the two opposite inner sides of the mounting frame, the mounting grooves being used to fix the connecting rod.

[0017] In some embodiments of this application, there are four connecting rods, and the connecting rods are perpendicular to the plane of the mounting frame;

[0018] The connecting rod includes a connecting part, and both ends of the connecting part are threaded parts, which are threadedly engaged with the mounting groove for fixation.

[0019] In some embodiments of this application, fixing holes are provided on the four sides of the mounting frame, and the fixing holes are used to fix it to the fixing seat.

[0020] In some embodiments of this application, the fixing base includes:

[0021] A fixed chassis is provided, with mounting holes evenly distributed along its edge. These mounting holes, in conjunction with fastening bolts, secure the fixed chassis to the vibration table.

[0022] A fixing block is provided on the fixing base. The fixing block has a mounting through hole, which mates with the fixing hole on the mounting frame. The two mounting frames are fixed to both sides of the fixing block by fastening bolts.

[0023] In some embodiments of this application, in order to improve the accuracy of accelerometer data acquisition, the first accelerometer, the second accelerometer, and the third accelerometer are respectively attached to the sensor, the mounting frame, and the fixed chassis.

[0024] In some embodiments of this application, the cross-sectional dimensions, material, and length of the vibration damping strips to be tested are consistent, so that the working state of the multiple vibration damping strips to be tested is consistent. The vibration damping strips to be tested are in a free tension state under the weight of the underwater sensor, ensuring that the vibration damping effect of each vibration damping strip on the sensor is consistent, so as to accurately measure the vibration damping performance of the vibration damping strip to be tested.

[0025] In some embodiments of this application, the mounting frame is made of aluminum sheet, and the fixing base is made of aluminum material.

[0026] In some embodiments of this application, the mounting frame is fixed to the mounting base on the left and / or right sides respectively, in order to detect the vibration reduction performance of the underwater sensor when subjected to excitation forces from the left and / or right sides.

[0027] Based on the above technical solution, the data collected by the first acceleration sensor are compared for vibration damping strips of different materials and lengths to be tested, and the vibration damping strip that meets the vibration damping requirements of the underwater sensor is selected to ensure the stability of the underwater sensor during operation.

[0028] By processing the data from the second and third accelerometers, the natural frequency of the test fixture is obtained, thereby obtaining the vibration damping performance data of the damping strip.

[0029] The cross-sectional dimensions, material, and length of the vibration damping strips to be tested are consistent to ensure that each strip has a consistent damping effect on the underwater sensor, so as to facilitate accurate measurement of the damping performance of the strip. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0031] Figure 1 This is a schematic diagram of the installation components and fixing base of the test fixture according to an embodiment of the present utility model;

[0032] Figure 2 This is a schematic diagram of the installation frame according to an embodiment of the present utility model;

[0033] Figure 3 This is a structural schematic diagram of the fixing base according to an embodiment of the present utility model.

[0034] In the picture:

[0035] 10. Mounting component; 11. Mounting frame; 111. Mounting slot; 112. Fixing hole; 113. Fastening bolt; 114. Second accelerometer sensor; 20. Connecting rod; 21. Connecting part; 30. Vibration damping strip to be tested; 40. Underwater sensor; 41. First accelerometer sensor; 50. Fixing base; 51. Fixing chassis; 511. Mounting hole; 512. Third accelerometer sensor; 52. Fixing block; 521. Mounting through hole. Detailed Implementation

[0036] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0037] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] like Figures 1-2 As shown, the vibration damping performance testing fixture for vibration-damping cables in this embodiment includes:

[0041] The mounting component 10 includes two mounting frames 11, each of which is a square frame structure. The two mounting frames 11 are located in two parallel vertical planes and are spaced apart.

[0042] Mounting grooves 111 are respectively opened at the top corners of the two opposite inner sides of the mounting frame 11. The mounting grooves 111 are used to fix the connecting rod 20. The mounting grooves 111 have a through hole structure and do not pass through the outer side of the mounting frame 11. They can limit the axial movement of the connecting rod 20 to a certain extent. The mounting grooves 111 have threaded holes inside.

[0043] In this embodiment, there are four connecting rods, which are respectively set between the mounting slots 111 at the four top corners of the two mounting frames 11. The connecting rods 20 are set horizontally and perpendicular to the plane where the two mounting frames 11 are located.

[0044] The connecting rod 20 in this embodiment includes a connecting part 21. Both ends of the connecting part 21 are threaded parts (not shown in the figure). The two threaded parts are respectively threaded into the mounting grooves 111 on the two mounting frames. The threaded engagement can prevent loosening when subjected to the excitation force of the vibration table, thereby affecting the test results of the damping strip under test.

[0045] In this embodiment, the vibration damping performance of the four vibration damping strips 30 to be tested is determined by testing them. One vibration damping strip 30 to be tested is fixed on each connecting rod 20. One end of the vibration damping strip 30 to be tested is tied to the connecting rod 20, and the other end is fixed to the underwater sensor 40. The four vibration damping strips 30 to be tested fix the underwater sensor 40 between the two mounting frames 11.

[0046] The bottom of the mounting assembly 10 is provided with a fixing base 50. Specifically, two fixing holes 112 are opened on each of the four sides of the mounting frame 11. The fixing holes 112 are used for fixing to the top of the fixing base 50; the bottom of the fixing base 50 is fixed to the vibration table; such as Figure 3 As shown, the mounting base 50 includes:

[0047] The fixed base 51 has multiple mounting holes 511 evenly distributed on its edge. The mounting holes 511 cooperate with fastening bolts (not shown in the figure) to fix the fixed base 51 to the vibration table.

[0048] The fixing block 52 is positioned above the fixing base 51, as shown below. Figure 3As shown, the fixing block 52 is a cuboid structure with two mounting through holes 521 extending along the width of the fixing block. The mounting through holes 521 mate with the fixing holes 112 on the mounting frame 11. The two mounting frames 11 are fixed to the two sides of the fixing block 52 by fastening bolts 113. The distance from the center of the mounting through hole 521 to the surface of the fixing base 51 is the same as the distance from the center of the fixing hole 112 to the outer side of the mounting frame 11. This ensures that after the mounting frame 11 is fixed to the fixing block 52, the outer side of the mounting frame 11 abuts against the upper surface of the fixing base 51, increasing the vertical stability of the mounting frame 11. This prevents the mounting frame 11 from being displaced vertically by the vibration force of the vibration table when there is a gap between the mounting frame 11 and the fixing base 51, which would affect the accuracy of the vibration damping performance test of the damping strip.

[0049] See also Figure 1 In order to ensure that each test damping strip 30 has a consistent damping effect on the underwater sensor 40 and to accurately measure the damping performance of the test damping strip 30, in this embodiment, the four test damping strips 40 have the same cross-sectional dimensions, material, and length. The four test damping strips 40 fix the underwater sensor 30 at the center of the mounting assembly 10. The underwater sensor 40 is equipped with a first acceleration sensor 41.

[0050] The vibration of the vibration table is transmitted to the mounting frame 11 of the mounting assembly 10 through the fixed base 50. The mounting frame 11 transmits the vibration to the damping strip 30 to be tested through the connecting rod 20. After being damped by the damping strip 30, the vibration is transmitted to the underwater sensor 40. The first acceleration sensor 41 on the underwater sensor 40 collects the vibration response data of the underwater sensor 40 after being subjected to vibration excitation.

[0051] In order to obtain the vibration reduction performance of the vibration damping strip 30 under test more accurately, the influence of the natural frequency of the test fixture needs to be considered. A second acceleration sensor 114 is set on one of the mounting frames 11. The second acceleration sensor 114 is used to collect the vibration response data of the test fixture after being excited by the excitation force.

[0052] A third acceleration sensor 512 is installed on the fixed base 51 of the fixed seat 50. The third acceleration sensor 512 is used to collect the excitation force output data of the vibrator of the vibration table. By processing the data collected by the second acceleration sensor 114 and the third acceleration sensor 512, the natural frequency of the test fixture is obtained.

[0053] To improve the accuracy of accelerometer data acquisition, in this embodiment, the first accelerometer 41, the second accelerometer 114, and the third accelerometer 512 are respectively attached to the underwater sensor 40, the mounting frame 11, and the fixed chassis 51.

[0054] The mounting frame 11 is made of aluminum sheet, and the fixing base 50 is also made of aluminum material, which is lightweight, high-strength, and easy to process.

[0055] When using the test fixture in this embodiment, first fix the two mounting frames 11 to the fixing block 52 with fastening bolts 113, then fix the fixing base to the vibration table with bolts, start the vibration table, the vibration table outputs excitation force, process and analyze the data collected by the second acceleration sensor 114 and the third acceleration sensor 512, calculate the natural frequency of the test fixture, and then turn off the vibration table.

[0056] The underwater sensor 40 is fixed to the connecting rod 12 of the mounting assembly via four vibration damping strips 30 to be tested. The four vibration damping strips 30 have the same cross-sectional dimensions, material, and length. A latex strip with a cross-sectional diameter of 12mm is selected as the vibration damping strip 30 to be tested. The first accelerometer 41 is attached to the underwater sensor 40. The latex strip is in a state of free tension under the weight of the underwater sensor 40 itself. The vibration table is started again. The excitation force output by the vibration table is consistent with the excitation force when the natural frequency of the test fixture is obtained. By analyzing and processing the data collected by the first accelerometer 41 and the third accelerometer 512, the vibration damping data of the latex strip is obtained. The vibration damping strip 30 to be tested is replaced, and a rubber strip with a cross-sectional diameter of 12mm is selected as the vibration damping strip to be tested. The above operation is repeated to obtain the vibration damping data of the rubber strip. According to the above method, the vibration damping performance of vibration damping strips with different materials, cross-sectional diameters, and lengths can be tested to select the vibration damping strip that meets the vibration damping requirements of the underwater sensor and ensure the stability of the underwater sensor during operation.

[0057] In other embodiments, mounting brackets 50 are fixed to the left and / or right sides of the mounting frame 11 to detect the vibration reduction performance of the underwater sensor 40 when subjected to excitation forces from the left and / or right sides.

[0058] Based on the above technical solution, the data collected by the first acceleration sensor are compared for vibration damping strips of different materials and lengths to be tested, and the vibration damping strip that meets the vibration damping requirements of the underwater sensor is selected to ensure the stability of the sensor during operation.

[0059] By processing the data from the second and third accelerometers, the natural frequency of the test fixture is obtained, thereby obtaining the vibration damping performance data of the damping strip.

[0060] The cross-sectional dimensions, material, and length of the damping strips to be tested are consistent to ensure that each damping strip has a consistent damping effect on the sensor, so as to facilitate accurate measurement of the damping performance of the damping strip under test.

[0061] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0062] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A testing fixture for the vibration damping performance of vibration-damping cables, characterized in that: The utility model relates to a kind of test device for underwater sensor, including: Mounting assembly, including two installation frames, two The installation frame is vertically spaced apart; Connecting rod, there are multiple, are uniformly distributed between two The installation frame, for connecting two The installation frame; Fixed seat, it is set in the bottom of the mounting assembly, the fixed seat is fixed on vibration table; Wherein, Each The connecting rod is connected with one measured damping strip respectively, the other end of the measured damping strip is fixed with underwater sensor, and first acceleration sensor is arranged on the underwater sensor; The vibration of the vibration table is transmitted to the mounting assembly through the fixed seat, the mounting assembly is transmitted to the measured damping strip through the connecting rod, and the vibration response data of the underwater sensor after being excited by vibration is collected by the first acceleration sensor after the vibration of the measured damping strip is transmitted to the underwater sensor after damping.

2. The damping performance test tool for a damping cable according to claim 1, wherein Second acceleration sensor is arranged on one of the installation frames, and the second acceleration sensor is used to collect the vibration response data of the test tool after being excited by exciting force. Third acceleration sensor is arranged on the fixed seat, and the third acceleration sensor is used to collect the output data of the exciter exciting force.

3. The damping performance test tool for a damping cable according to claim 1, wherein The installation frame is a square frame structure, the planes of two The installation frame is parallel to each other, and the top corners of the opposite two inner sides of the installation frame are respectively provided with mounting grooves, and the mounting grooves are used to fix the connecting rod.

4. The damping performance test tool for a damping cable according to claim 3, wherein The connecting rod has four, and the connecting rod is perpendicular to the plane of the installation frame. The connecting rod includes a connecting portion, and the two ends of the connecting portion are threaded portions, and the threaded portions are fixed in threaded cooperation with the mounting grooves.

5. The vibration damping cable vibration damping performance test tooling of claim 2, wherein, Fixed holes are respectively formed in the four edges of the installation frame, and the fixed holes are used to be fixed with the fixed seat.

6. The vibration damping cable vibration damping performance test tooling of claim 5, wherein, The fixed seat includes: Fixed base plate, the edges of the fixed base plate are uniformly distributed with mounting holes, and the mounting holes are matched with fastening bolts to fix the fixed base plate with vibration table; Fixed block, set on the fixed base plate, the fixed block is provided with mounting through hole, and the mounting through hole is matched with the fixed hole on the installation frame, and two The installation frame is respectively fixed on the two sides of the fixed block by fastening bolt.

7. The vibration damping cable vibration damping performance test tooling of claim 6, wherein, The first acceleration sensor, the second acceleration sensor and the third acceleration sensor are respectively pasted on the underwater sensor, the installation frame and the fixed base plate.

8. The vibration damping performance test tool for a vibration damping cable according to claim 1, wherein The cross-sectional dimension, material and length of the measured damping strip are consistent, so that the working state of multiple The measured damping strip remains consistent, and the measured damping strip is in free stretching state under the gravity of underwater sensor itself.

9. The vibration damping performance test tool for a vibration damping cable according to claim 1, wherein The installation frame is aluminum plate, and the fixed seat is made of aluminum.

10. The vibration damping cable vibration damping performance test tooling of claim 1, wherein, The left side and / or right side of the installation frame is respectively fixed with the fixed seat.

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