A ship vibration and noise measurement device

Abstract

This utility model relates to the field of ship vibration and noise measurement technology, specifically a ship vibration and noise measurement device, including a base plate, a shell on the top of the base plate, an acoustic duct fixed to the left end of the shell, a plurality of neodymium iron boron permanent magnet arrays at the bottom of the base plate, a shell cover on the top of the shell, a vibration damping layer slidably connected inside the shell, an electromagnetic shielding box tightly fitted inside the vibration damping layer, a partition net fixed inside the electromagnetic shielding box, a noise sensor at the left end of the partition net and fastened to the acoustic duct by bolts, a support block slidably connected in a groove at the right end of the partition net, and a vibration sensor tightly fitted inside the support block; this utility model uses an acoustic duct to transmit noise to the noise sensor, thereby ensuring the accuracy of noise measurement, and the angle between the acoustic duct and the shell is 30°, thereby avoiding airflow directly impacting the noise sensor, thus ensuring the safety of the noise sensor.

Description

Technical Field

[0001] This utility model belongs to the field of ship vibration and noise measurement technology, specifically a ship vibration and noise measurement device. Background Technology

[0002] Ship noise primarily originates from mechanical vibrations (such as those from the main engine and gearbox), hydrodynamic effects (such as propeller cavitation), and structural sound propagation (such as hull vibrations transmitted into the water). Measuring vibrations and noise during ship operation allows staff to monitor the condition of ship components and assess the extent of damage.

[0003] Existing vibration and noise sensors are installed separately, resulting in tangled wiring inside the housing, which is susceptible to electromagnetic interference. At the same time, the sensors are directly and rigidly fixed to the housing, and high-frequency vibrations of the ship are easily transmitted to the sensor body, affecting the measurement accuracy. The mounting base lacks an adaptive adjustment structure, making it difficult to fit the curved or corroded surface of the ship. In order to solve the above problems, this utility model designs a ship vibration and noise measurement device. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a ship vibration and noise measuring device, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a ship vibration and noise measuring device, comprising a base plate, an outer shell fastened to the top of the base plate by bolts, an acoustic duct fixed to the left end of the outer shell, a plurality of positioning disks provided at the bottom of the base plate, each positioning disk having a set of neodymium iron boron permanent magnet arrays fixed inside, a vacuum suction cup at the bottom of each positioning disk, a shell cover hinged to the top of the outer shell, a vibration damping layer slidably connected inside the outer shell, the vibration damping layer being slidably connected to the acoustic duct, an electromagnetic shielding box tightly fitted inside the vibration damping layer, the left end of the electromagnetic shielding box being tightly fitted to the top end of the acoustic duct, a partition mesh fixed inside the electromagnetic shielding box, a noise sensor provided at the left end of the partition mesh being fastened to the acoustic duct by bolts, a support block slidably connected in a groove at the right end of the partition mesh, and a vibration sensor tightly fitted inside the support block.

[0006] Preferably, heat dissipation fins are fixed to the outside of the outer shell and the outer cover, a fan motor is fixed to the front side of the front heat dissipation fins, a fan is rotatably connected to the rear end of the fan motor, and a buckle is rotatably connected to the front end of the outer cover, the buckle engaging with the front end of the outer shell.

[0007] Preferably, a plurality of support bearings are fixed to the bottom of the base plate, and a reversing head is fixed to the inner ring of each support bearing by a fixing rod. A reversing block is rotatably connected inside each reversing head. A plurality of locking grooves are provided on the outer side of each reversing block. A locking rod is slidably connected to the outer side of the rotating shaft of each reversing block. A locking plate is fixed to the outer end of each locking rod. A locking spring is fixed to the inner side of each locking plate. Each locking spring is fixedly connected to the rotating shaft of the reversing block inside it.

[0008] Preferably, each of the reversing blocks has a support shaft fixed at its bottom, and a plurality of connecting rods are fixed to the outside of each support shaft. Each connecting rod is fixedly connected to the positioning plate at its bottom. Each support shaft has a vacuum pump fixed at its bottom, and each vacuum pump has a vacuum valve fixed at its bottom. Each vacuum valve is fixedly connected to the vacuum suction cup at its bottom through a pipe.

[0009] Preferably, the bottom of the acoustic duct is covered with a hydrophobic and breathable membrane, the inside of the acoustic duct is fixed with a spiral anti-reflective pattern, the upper and lower ends of the vibration damping layer are fastened with vibration damping covers by bolts, the upper and lower ends of the electromagnetic shielding box are fastened with shielding box doors by bolts, the inside of the electromagnetic shielding box is fixed with a partition plate, the top of the partition plate is fastened with a control unit by bolts, and the bottom of the partition plate is detachably connected to a removable battery.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This invention uses an acoustic conduit to deliver noise to a noise sensor, thereby ensuring the accuracy of noise measurement. The angle between the acoustic conduit and the outer shell is 30°, which prevents airflow from directly impacting the noise sensor and ensures the safety of the noise sensor. The hydrophobic and breathable membrane can prevent liquid penetration while allowing gas to pass freely, thereby ensuring the accuracy of noise measurement. The spiral anti-reflective texture, through surface structure design, causes sound waves to scatter, absorb, or cancel phase at the interface, reducing the intensity of reflected waves and thus improving the accuracy of noise measurement.

[0012] This invention utilizes a vacuum suction cup and a neodymium iron boron permanent magnet array to simultaneously attract both magnetic and non-magnetic components, thereby expanding the device's application range. The fan motor drives a fan for convenient cooling, while heat dissipation fins enhance cooling efficiency, ensuring safety and extending lifespan. The vibration damping cover, shielding door, and housing allow for disassembly, facilitating the installation of noise and vibration sensors. Furthermore, the electromagnetic shielding enclosure prevents electromagnetic interference, further ensuring measurement accuracy.

[0013] This invention uses a snap-fit ​​mechanism to seal the cover and outer shell while allowing for easy opening of the cover, facilitating the maintenance of noise and vibration sensors and improving the overall convenience of the device. The damping layer has several honeycomb holes, which isolate the transmission of high-frequency vibrations from the ship and facilitate heat dissipation for the internal components. The support bearing, commutator block, and commutator head work together to allow the neodymium iron boron permanent magnet array and vacuum chuck to change their angles, thereby enabling the device to grip ships with varying degrees of curvature and expanding its overall applicability. Attached Figure Description

[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall bottom of this utility model;

[0018] Figure 3 This is a schematic diagram of the overall rear end of this utility model;

[0019] Figure 4 This is a schematic diagram of the bottom of the support bearing of this utility model;

[0020] Figure 5 This is a schematic diagram of the external appearance of the commutator head of this utility model;

[0021] Figure 6 This is a schematic cross-sectional view of the present invention;

[0022] Figure 7 This is a schematic diagram of the vibration damping layer of this utility model;

[0023] Figure 8 This is a cross-sectional schematic diagram of the acoustic conduit of this utility model;

[0024] Figure 9 This is a cross-sectional schematic diagram of the electromagnetic shielding box of this utility model.

[0025] Figure 10 This is a schematic diagram of the interior of the electromagnetic shielding box of this utility model.

[0026] In the diagram: 1-Outer shell; 2-Acoustic duct; 3-Support bearing; 4-Base plate; 5-Support shaft; 6-Vibration damping layer; 7-Electromagnetic shielding box; 101-Heat dissipation fins; 102-Fan motor; 103-Fan; 104-Shell cover; 105-Snap fastener; 201-Hydrophobic and breathable membrane; 202-Spiral anti-reflective texture; 301-Commutator block; 302-Commutator head; 303-Locking plate; 304-Locking spring; 305- Locking rod; 306-locking groove; 501-connecting rod; 502-positioning plate; 503-neodymium iron boron permanent magnet array; 504-vacuum pump; 505-vacuum valve; 506-vacuum suction cup; 601-vibration damping cover; 701-partition plate; 702-control unit; 703-removable battery; 704-partition mesh; 705-noise sensor; 706-vibration sensor; 707-support block; 708-shielded box door. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] Example 1, by Figures 1-3 , Figures 6-8The present invention includes a base plate 4 made of alloy material, which supports the entire device. A housing 1, also made of alloy material, is bolted to the top of the base plate 4 and is used to position the heat dissipation fins 101. An acoustic conduit 2, also made of alloy material, is fixed to the left end of the housing 1. The acoustic conduit 2 is at a 30° angle to the housing 1 to prevent airflow from directly impacting the noise sensor 705, thus ensuring the safety of the noise sensor 705. The acoustic conduit 2 is used to deliver noise to the noise sensor 705, thereby ensuring the accuracy of noise measurement. The bottom of the base plate 4 is provided with several positioning disks 502, which are made of alloy material. The positioning disks 502 are used to position the neodymium iron boron permanent magnet array 503. Each positioning disk 502 has a set of neodymium iron boron permanent magnet arrays 503 fixed inside. The neodymium iron boron permanent magnet arrays 503 can generate a strong attraction with magnetic materials, thereby ensuring the stability of the entire device during operation. Each positioning disk 502 is provided with a vacuum suction cup 506 at its bottom. The vacuum suction cup 506 can attract non-metallic materials. The combination of the two can improve the application range of the entire device. The top of the outer shell 1 is hinged to a shell cover 104, which is made of alloy material. Made of a material, the outer shell 1 has a slidably connected vibration damping layer 6 inside. The vibration damping layer 6 is made of rubber material and has several honeycomb holes. The vibration damping layer 6 is used to isolate the transmission of high-frequency vibrations of the ship and facilitates heat dissipation of internal components. The vibration damping layer 6 is slidably connected to the acoustic duct 2. An electromagnetic shielding box 7, made of copper material, is tightly fitted inside the vibration damping layer 6. The electromagnetic shielding box 7 can prevent electromagnetic interference, thereby ensuring the accuracy of the measurement. The left end of the electromagnetic shielding box 7 is tightly fitted to the top end of the acoustic duct 2. A partition mesh 704 is fixed inside the electromagnetic shielding box 7. The mesh 704 is made of copper and has several through holes. The mesh 704 can divide the electromagnetic shielding box 7 into several chambers. A noise sensor 705 is provided at the left end of the mesh 704 and is fastened to the acoustic duct 2 by bolts. The noise sensor 705 is used to measure ship noise. A support block 707 is slidably connected in a groove at the right end of the mesh 704. The support block 707 is made of rubber and is used to position the vibration sensor 706. The vibration sensor 706 is tightly fitted inside the support block 707 and is used to measure ship vibration.

[0029] Example 2, based on Example 1, combined with... Figures 4-5 , Figures 9-10As shown, heat dissipation fins 101 are fixed to the exterior of the outer shell 1 and the shell cover 104. The heat dissipation fins 101 are made of aluminum alloy and facilitate cooling of the entire device. A fan motor 102 is fixed to the front side of the heat dissipation fins 101, and a fan 103 is rotatably connected to the rear end of the fan motor 102. The fan motor 102 can drive the fan 103 to rotate, thereby facilitating cooling, ensuring the safety of the entire device, and improving its service life. A buckle 105 is rotatably connected to the front end of the shell cover 104. The buckle 105 is made of plastic material and engages with the front end of the outer shell 1. The buckle 105 allows the shell cover 104 and the outer shell 1 to be sealed while being easily opened. The cover 104 facilitates the inspection and maintenance of the internal parts of the outer casing 1, thereby improving the overall convenience of the device. Several support bearings 3 are fixed to the bottom of the base plate 4. These support bearings 3 are used to position the reversing head 302. The inner ring of each support bearing 3 is fixed with a reversing head 302 via a fixing rod. The reversing head 302 is used to position the reversing block 301. A reversing block 301 is rotatably connected inside each reversing head 302. Several locking grooves 306 are provided on the outer side of each reversing block 301. A locking rod 305 is slidably connected to the outer side of the rotating shaft of each reversing block 301. The locking rod 305 is made of alloy material and can engage with the locking grooves 306 to ensure the stability of the reversing block 301. A locking plate 303, made of alloy material, is fixed to the outer end of each locking rod 305. The locking plate 303 is used to position the locking rod 305. A locking spring 304, made of alloy material, is fixed to the inner side of each locking plate 303. The locking spring 304 is elastic and allows the locking plate 303 to approach the reversing head 302 when no force is applied. Each locking spring 304 is fixedly connected to the rotating shaft of the reversing block 301 inside it. A support shaft 5, made of alloy material, is fixed to the bottom of each reversing block 301. The support shaft 5 is used to position the connecting rod 501. Several connecting rods 501, made of alloy material, are fixed to the outside of each support shaft 5. The connecting rod 501 is used to position the positioning disk 502. Each connecting rod 501 is fixedly connected to the positioning disk 502 at its bottom. A vacuum pump 504 is fixedly fixed to the bottom of each support shaft 5, and a vacuum valve 505 is fixedly fixed to the bottom of each vacuum pump 504. The vacuum pump 504 and the vacuum valve 505 cooperate to create a vacuum inside the vacuum suction cup 506, thereby clamping the non-magnetic mechanism and improving the overall usability of the device. Each vacuum valve 505 is fixedly connected to the vacuum suction cup 506 at its bottom via a pipe. The bottom of the acoustic conduit 2 is covered with a hydrophobic and breathable membrane 201. The hydrophobic and breathable membrane 201 can prevent liquid penetration while allowing gas to pass freely, thereby ensuring the accuracy of noise measurement.The acoustic duct 2 has a spiral anti-reflection pattern 202 fixed inside. Through surface structure design, the spiral anti-reflection pattern 202 causes sound waves to scatter, absorb, or cancel phase at the interface, reducing the intensity of reflected waves and thus improving the accuracy of noise measurement. The upper and lower ends of the vibration damping layer 6 are fastened with vibration damping covers 601 by bolts. The vibration damping covers 601 are made of rubber and allow easy opening of the vibration damping layer 6, facilitating the disassembly of the electromagnetic shielding box 7. The upper and lower ends of the electromagnetic shielding box 7 are fastened with shielding box doors 708 by bolts. The shielding box doors 708 are made of copper and have a perforation mechanism. The shielding box door 708 is designed for easy disassembly, allowing for convenient removal of the removable battery 703, the noise sensor 705, and the vibration sensor 706. An internal partition plate 701, made of alloy material, is fixed inside the electromagnetic shielding box 7. This partition plate separates the control unit 702 from the removable battery 703, preventing electromagnetic interference. The control unit 702 is bolted to the top of the partition plate 701, controlling the entire device. The bottom of the partition plate 701 is detachably connected to the removable battery 703, which provides the necessary power to the entire device.

[0030] When using this vibration damper, the operator opens the shell cover 104 using the buckle 105, secures the base plate 4 with bolts, then installs the vibration damping layer 6, with the bottom vibration damping cover 601 secured, inside the outer shell 1. Next, the operator inserts the removable battery 703 into the groove of the partition plate 701. Then, the operator installs the electromagnetic shielding box 7, with the bottom shielding box door 708 secured, inside the vibration damping layer 6. Finally, the operator secures the noise sensor 705 to the top of the hydrophobic and breathable membrane 201 with bolts. Finally, the operator installs the support... Block 707 is snapped into the electromagnetic shielding box 7, and the vibration sensor 706 is further inserted into the support block 707. At this time, the operator uses bolts to fasten the top shielding box door 708 to the electromagnetic shielding box 7. The operator then fixes the top vibration damping cover 601 and locks the shell cover 104. At this time, the operator rotates the support shaft 5 and the reversing block 301 to make the neodymium iron boron permanent magnet array 503 and the vacuum suction cup 506 face the ship. If the required fixing position is a magnetic component, the operator presses the removable battery 703 to ensure the stability of the entire device. If it is a non-magnetic component... At this point, the operator uses an external control device to control the control unit 702, causing the vacuum pump 504 and vacuum valve 505 to work together to extract air from the vacuum suction cup 506, thus ensuring the vacuum suction cup 506 is in close contact with the non-magnetic component and guaranteeing the stability of the entire device. Further, the operator uses the locking plate 303 and locking spring 304 to lock the locking rod 305 and locking groove 306, ensuring the stability of the entire device. Then, the measurement work begins. At this time, the control unit 702 controls the fan motor 102 to operate, thereby driving the fan 103 to rotate. To cool the entire device, the vibration damping layer 6 and the support block 707 isolate the transmission of high-frequency vibrations from the ship, thus ensuring the accuracy of the vibration sensor 706. Simultaneously, noise is transmitted to the noise sensor 705 through the acoustic duct 2. The hydrophobic and breathable membrane 201 prevents water vapor from entering the acoustic duct 2, ensuring the safety of the noise sensor 705. Furthermore, the spiral anti-reflective texture 202 causes sound waves to scatter, absorb, or cancel phase at the interface, reducing the intensity of reflected waves and improving the accuracy of noise measurement by the noise sensor 705.

[0031] The working process of this utility model is as follows: When using this vibration damper, the operator opens the shell cover 104 through the buckle 105, fixes the base plate 4 with bolts, and then installs the vibration damping layer 6, which is fixed to the bottom vibration damping cover 601, inside the shell 1. Next, the operator inserts the removable battery 703 into the groove of the partition plate 701. At this time, the operator installs the electromagnetic shielding box 7, which is fixed to the bottom shielding box door 708, inside the vibration damping layer 6. Finally, the operator fastens the noise sensor 705 to the top of the hydrophobic and breathable membrane 201 with bolts. The operator engages the support block 707 with the electromagnetic shielding box 7, then inserts the vibration sensor 706 into the support block 707. The operator then secures the top shielding box door 708 to the electromagnetic shielding box 7 with bolts. Next, the operator fixes the top vibration damping cover 601 and locks the shell cover 104. The operator then rotates the support shaft 5 and the reversing block 301 to align the neodymium iron boron permanent magnet array 503 and the vacuum suction cup 506 with the ship. If the required fixing position is a magnetic component, the operator presses down on the removable battery 703 to ensure the stability of the entire device. If the component is non-magnetic, the operator uses an external control device to control the control unit 702, causing the vacuum pump 504 and vacuum valve 505 to work together to extract air from the vacuum suction cup 506, thus ensuring the vacuum suction cup 506 is in close contact with the non-magnetic component and guaranteeing the stability of the entire device. The operator then uses the locking plate 303 and locking spring 304 to lock the locking rod 305 and locking groove 306, further ensuring the stability of the entire device. Measurement work then begins, at which point the control unit 702 controls the fan motor 102 to operate, thereby driving the fan 103 to rotate. This cools the entire device. At this time, the vibration damping layer 6 and the support block 707 isolate the transmission of high-frequency vibrations of the ship, thus ensuring the accuracy of the vibration sensor 706. Meanwhile, noise is transmitted to the noise sensor 705 through the acoustic duct 2. At this time, the hydrophobic and breathable membrane 201 prevents water vapor from entering the interior of the acoustic duct 2, thus ensuring the safety of the noise sensor 705. At the same time, the spiral anti-reflection texture 202 causes sound waves to scatter, absorb, or cancel phase at the interface, reducing the intensity of reflected waves and thus improving the accuracy of noise measurement by the noise sensor 705.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ship vibration noise measuring device, characterized by: The system includes a base plate (4), to which a shell (1) is fastened by bolts. An acoustic duct (2) is fixed to the left end of the shell (1). Several positioning discs (502) are provided at the bottom of the base plate (4). Each positioning disc (502) has a set of neodymium iron boron permanent magnet arrays (503) fixed inside. Each positioning disc (502) has a vacuum suction cup (506) at the bottom. A shell cover (104) is hinged to the top of the shell (1). A vibration damping layer (6) is slidably connected inside the shell (1). The vibration damping layer (6) is connected to the shell cover (104) by bolts. The acoustic duct (2) is slidably connected, and the vibration damping layer (6) is tightly fitted with an electromagnetic shielding box (7). The left end of the electromagnetic shielding box (7) is tightly fitted with the top end of the acoustic duct (2). A partition net (704) is fixed inside the electromagnetic shielding box (7). A noise sensor (705) is provided at the left end of the partition net (704) and is fastened to the acoustic duct (2) by bolts. A support block (707) is slidably connected in the groove at the right end of the partition net (704). A vibration sensor (706) is tightly fitted inside the support block (707).

2. A device for measuring the vibration and noise of a ship according to claim 1, characterized in that: Heat dissipation fins (101) are fixed to the outside of the outer shell (1) and the shell cover (104). A fan motor (102) is fixed to the front side of the heat dissipation fins (101). A fan (103) is rotatably connected to the rear end of the fan motor (102). A buckle (105) is rotatably connected to the front end of the shell cover (104). The buckle (105) is engaged with the front end of the outer shell (1).

3. A ship vibration noise measuring apparatus according to claim 2, characterized in that: The bottom of the base plate (4) is fixed with several support bearings (3). The inner ring of each support bearing (3) is fixed with a reversing head (302) by a fixing rod. The reversing block (301) is rotatably connected inside each reversing head (302). Several locking grooves (306) are provided on the outer side of each reversing block (301). A locking rod (305) is slidably connected to the outer side of the rotating shaft of each reversing block (301). A locking plate (303) is fixed at the outer end of each locking rod (305). A locking spring (304) is fixed on the inner side of each locking plate (303). Each locking spring (304) is fixedly connected to the rotating shaft of the reversing block (301) on its inner side.

4. A ship vibration noise measuring apparatus according to claim 3, characterized in that: Each of the reversing blocks (301) has a support shaft (5) fixed at its bottom. Each of the support shafts (5) has several connecting rods (501) fixed to its exterior. Each connecting rod (501) is fixedly connected to the positioning plate (502) at its bottom. Each of the support shafts (5) has a vacuum pump (504) fixed at its bottom. Each of the vacuum pumps (504) has a vacuum valve (505) fixed at its bottom. Each of the vacuum valves (505) is fixedly connected to the vacuum suction cup (506) at its bottom via a pipe.

5. The apparatus for measuring vibration and noise of a ship according to claim 1, wherein: The bottom of the acoustic duct (2) is covered with a hydrophobic and breathable membrane (201). The inside of the acoustic duct (2) is fixed with a spiral anti-reflection pattern (202). The upper and lower ends of the vibration damping layer (6) are fastened with vibration damping covers (601) by bolts. The upper and lower ends of the electromagnetic shielding box (7) are fastened with shielding box doors (708) by bolts. The inside of the electromagnetic shielding box (7) is fixed with a partition plate (701). The top of the partition plate (701) is fastened with a control unit (702) by bolts. The bottom of the partition plate (701) is detachably connected with a removable battery (703).

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