Counterweight chassis and seabed sensing and collecting device assembly
By using a counterweight chassis and a hollowed-out opening design, the problem of the seabed sensing and acquisition device deflecting on the seabed was solved, achieving stable reception of seabed vibration signals and accurate data, and simplifying the production process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIHAI SUNFULL GEOPHYSICAL EXPLORATION EQUIP
- Filing Date
- 2025-09-12
- Publication Date
- 2026-06-26
AI Technical Summary
When deployed on the seabed, seabed sensing and acquisition devices are easily deflected by buoyancy and ocean currents, resulting in inconsistent vibration signal detection directions and affecting the accuracy of data processing.
The device employs a counterweight chassis design, with the seabed sensing and acquisition device secured by bolts. A perforated opening and inserted support feet ensure stable coupling between the device and the seabed. Combined with a three-component vibration sensor to form a Cartesian coordinate system, it enables accurate sensing of signals in all directions.
Ensuring the stable positioning of the seabed sensing and acquisition device in the water improves the accuracy of signal reception and the stability of the device, simplifies the structure and reduces production costs.
Smart Images
Figure CN224417043U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of marine monitoring device technology, and more specifically, relates to a counterweight chassis and seabed sensing and acquisition device assembly. Background Technology
[0002] Seabed sensing and acquisition devices can be used to pick up signals from the seabed surface for later data processing and analysis. For example, vibration sensors can be used to detect vibration signals from the seabed surface. To ensure the accuracy of vibration signals collected from all directions, it is often necessary to use a three-component sensor for detection. For instance, Chinese invention patent CN101556335A discloses a three-component marine seismic wave detection sensor, which has vibration sensors installed in three orthogonal directions to detect signals from different azimuths. However, this scheme is used to detect vibration signals in the water body, not vibration signals from the seabed surface.
[0003] Because vibration sensors are directional, when seabed sensing and data acquisition devices are deployed in a matrix on the seabed in batches, the sensors must be aligned to avoid rotation or inversion. This is crucial for the consistency and accuracy of subsequent data processing. Furthermore, due to the effects of buoyancy and ocean currents on the seabed, directly placing the seabed sensing and data acquisition devices on the seabed can easily cause them to deflect. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this application provides a counterweight chassis and seabed sensing and acquisition device assembly, which can ensure stable coupling of the seabed sensing and acquisition device with the seabed surface and ensure data accuracy.
[0005] To achieve the above objectives, the technical solution of this application provides a counterweight chassis, including a chassis body and a clamping ring. The chassis body has a strip-shaped mounting through hole for accommodating a seabed sensing and acquisition device. The portion of the chassis body located on both sides of the strip-shaped mounting through hole has several bolt holes. One end of the strip-shaped mounting through hole has a lower groove, and the middle of the clamping ring has an upper groove. Both ends of the clamping ring are bolted to the top of the chassis body. The upper groove is fastened to the top of the lower groove. The surface of the chassis body has several hollowed-out openings, and the bottom of the chassis body has several insertion feet.
[0006] The seabed sensing and data acquisition device can be bolted to the strip-shaped mounting holes of the counterweight chassis. Due to the directional nature of the three-component vibration sensor assembly, the counterweight chassis achieves an overall weight-increasing effect, ensuring stable positioning in the water. The perforated opening ensures good sand penetration, facilitating rapid coupling into and removal from the sediment. When the seabed sensing and data acquisition device assembly is placed on the seabed, the insert legs sink into the sediment, allowing the bottom of the device to directly contact the seabed and receive vibration signals, ensuring accurate signal reception. The insert legs sinking into the sediment ensure good coupling between the seabed sensing and data acquisition device assembly and the seabed, increasing stability.
[0007] Optionally, several pits are distributed on the top of both sides of the strip-shaped mounting hole on the disk body, and each pit has a bolt hole at its bottom. The outer shell of the seabed sensing and acquisition device can be provided with a connecting part corresponding to the shape and position of the pit. The connecting part is locked inside the pit for easy alignment. Subsequently, the connecting part is bolted to the bolt hole in the pit to fix the seabed sensing and acquisition device.
[0008] Optionally, several upper protrusions are evenly distributed around the top of the disk, and several insertion feet are evenly distributed around the bottom of the disk. Because the cable of the seabed sensing and acquisition device is quite long, it is coiled on top of the disk during transportation. At this time, the edges of the cable are shielded by the upper protrusions to prevent it from unraveling.
[0009] A seabed sensing and data acquisition device assembly includes a seabed sensing and data acquisition device and a counterweight chassis as described above. The seabed sensing and data acquisition device includes a cylindrical shell, a multi-core corrosion-resistant cable, and a three-component vibration sensor assembly. The three-component vibration sensor assembly is fixedly installed inside the cylindrical shell. The multi-core corrosion-resistant cable is introduced into the cylindrical shell from its outer end, and the cores of the multi-core corrosion-resistant cable are connected to the three-component vibration sensor assembly. Several connecting parts are distributed on both sides of the outer wall of the cylindrical shell, and each connecting part has a bolt hole II. The seabed sensing and data acquisition device is placed in a strip-shaped mounting through hole. Bolt hole II is aligned with bolt hole I and connected to each other by bolts. The multi-core corrosion-resistant cable is inserted into the cylindrical shell and clamped in the upper and lower grooves at its root. Due to the weight-increasing effect of the chassis and the stabilizing effect of the inserted support feet, the orientation of the three-component vibration sensor assembly can remain stable in the water, ensuring accurate data collection.
[0010] Optionally, the three-component vibration sensor assembly includes a cylindrical fixed base, a pressure-bearing cylinder, and three sets of vibration sensors. The cylindrical fixed base has two mounting cavities on its sidewalls and a third mounting cavity at its end. The extension directions of mounting cavities one, two, and three are perpendicular to each other. The three sets of vibration sensors are fixedly installed in mounting cavities one, two, and three, respectively, and are arranged perpendicularly to each other. The pressure-bearing cylinder is fixedly sleeved on the outside of the cylindrical fixed base and is fixedly installed inside the cylindrical shell. A multi-core corrosion-resistant cable extends from the end of the cylindrical fixed base away from mounting cavity three and passes through the cylindrical fixed base. The cores of the multi-core corrosion-resistant cable are connected to the three sets of vibration sensors. Because the vibration sensor 7 has directional detection, the three sets of mutually perpendicular vibration sensors 7 form a Cartesian coordinate system, capable of sensing vibration signals in all directions.
[0011] Optionally, the side wall of the cylindrical fixing base is provided with three sets of threaded connection holes, which respectively extend from the side to the first mounting cavity, the second mounting cavity, and the third mounting cavity. The three sets of vibration sensors are respectively fixed and installed in the first mounting cavity, the second mounting cavity, and the third mounting cavity by screws that screw through the three sets of threaded connection holes. The end of the cylindrical fixing base away from the third mounting cavity has a sealing platform, which seals the end of the pressure-bearing cylinder. The pressure-bearing cylinder and the sealing platform are connected by screws, so as to realize the installation of the vibration sensor, the cylindrical fixing base, and the pressure-bearing cylinder.
[0012] Optionally, it also includes an external threaded plug. A connecting post extends from the side of the sealing platform away from the installation cavity. Several annular protrusions are distributed on the outer wall of the connecting post. A threaded countersunk hole is opened at the end of the connecting post opposite to the sealing platform. The external threaded plug is sleeved on the outside of the multi-core corrosion-resistant cable and screwed into the threaded countersunk hole. An injection head covers the outside of the connecting post. The injection head seals the connection between the multi-core corrosion-resistant cable, the external threaded plug, and the threaded countersunk hole, and also seals the connection between the cylindrical shell, the pressure-bearing cylinder, and the sealing platform. A columnar protrusion is integrally formed at the end of the injection head. The root of the multi-core corrosion-resistant cable passes through the columnar protrusion, which is held between the upper and lower grooves. The injection head seals and fixes the end of the entire seabed sensing and acquisition device, ensuring airtightness.
[0013] Optionally, it also includes an impedance matching device and a piezoelectric ceramic sheet. The end of the pressure-bearing cylinder away from the injection head is sealed with an end cap by screws. The end of the cylindrical shell away from the injection head is a sealed end. The interior of the sealed end and the end cap form an acoustic cavity, which is filled with encapsulating adhesive. The impedance matching device and the piezoelectric ceramic sheet are both submerged in the encapsulating adhesive and fixed inside the solidified encapsulating adhesive. Some cores of the multi-core corrosion-resistant cable pass through the end cap and are connected to the secondary winding of the impedance matching device. The primary winding of the impedance matching device is connected to the piezoelectric ceramic sheet through a wire.
[0014] Piezoelectric ceramics are used to collect acoustic information in water. The acoustic waves in the water are completely transmitted to the piezoelectric ceramic element through the cylindrical shell and the solidified encapsulating adhesive, ensuring detection accuracy. After sensing a pressure signal, the change in charge of the piezoelectric ceramic element is converted into a voltage by an impedance matching device, and then the signal is conducted to the outside by the cores of a multi-core corrosion-resistant cable. Because the solidified encapsulating adhesive fixes the position of the piezoelectric ceramic element, no additional fixing structure is needed, nor is liquid sealing required, greatly simplifying the overall device structure and reducing production costs and difficulty.
[0015] Optionally, an acoustic protective cap is fixedly fitted onto the outer side of the sealing end, forming a transition cavity between the acoustic protective cap and the outer wall of the sealing end. A piezoelectric ceramic sheet is placed upright within the acoustic cavity. The side wall of the acoustic protective cap has two sets of first slots and two sets of second slots communicating with the transition cavity. The two sets of first slots face the left and right sides of the piezoelectric ceramic sheet, respectively, and the two sets of second slots face the top and bottom edges of the piezoelectric ceramic sheet, respectively. Due to the complex environment in water, the acoustic protective cap, when fastened to the outside of the sealing end, prevents debris in the water from directly colliding with the outer wall of the sealing end, thus preventing leakage from the acoustic cavity. Water flows into the transition cavity through the first and second slots. Since the first slot faces the surface of the piezoelectric ceramic sheet, sound waves, after passing through the first slot, propagate vibrations within the transition cavity to the sealing end and then to the surface of the piezoelectric ceramic sheet within the acoustic cavity, ensuring accurate detection data. In water rich in sediment, sediment deposited in the transition cavity can be discharged from the second slot at the bottom, preventing sediment accumulation and blockage of the transition cavity.
[0016] Optionally, the piezoelectric ceramic sheet has several sets, and the acoustic cavity has several grooves corresponding to the piezoelectric ceramic sheet one by one. The grooves are arranged linearly and at intervals. The piezoelectric ceramic sheet is embedded into the corresponding groove one by one. A water channel is opened on the outside of the sealing end, passing through any two adjacent grooves. Water entering the transition cavity can also enter the water channel. Sound waves are transmitted from the water channel to the wall of the sealing end and to the surface of the piezoelectric ceramic sheet.
[0017] The advantages of the technical solution in this application compared to the prior art are as follows:
[0018] The seabed sensing and data acquisition device can be bolted to the strip-shaped mounting holes of the counterweight chassis. Due to the directional nature of the three-component vibration sensor assembly, the counterweight chassis achieves an overall weight-increasing effect, ensuring stable positioning in the water. The perforated opening ensures good sand penetration, facilitating rapid coupling into and removal from the sediment. When the seabed sensing and data acquisition device assembly is placed on the seabed, the insert legs sink into the sediment, allowing the bottom of the device to directly contact the seabed and receive vibration signals, ensuring accurate signal reception. The insert legs sinking into the sediment ensure good coupling between the seabed sensing and data acquisition device assembly and the seabed, increasing stability. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the counterweight chassis structure;
[0021] Figure 2 This is a schematic diagram of the overall structure of the seabed sensing and data acquisition device assembly.
[0022] Figure 3 A schematic diagram of the overall structure of the seabed sensing and data acquisition device;
[0023] Figure 4 An exploded view of the overall structure of the seabed sensing and data acquisition device;
[0024] Figure 5 This is a schematic diagram of the installation structure of the vibration sensor and the cylindrical fixing base;
[0025] Figure 6 A schematic diagram of the installation structure for the cylindrical fixed base, pressure-bearing cylinder, and end cap;
[0026] Figure 7 A schematic diagram of the installation structure of the cylindrical fixed base and the injection head;
[0027] Figure 8 A sectional view of the installation structure of the cylindrical fixed base and the injection head;
[0028] Figure 9 A schematic diagram of the cylindrical shell and acoustic protective cap structure;
[0029] Figure 10 This is a top-down structural cross-sectional view of the seabed sensing and acquisition device located in the acoustic cavity.
[0030] Icons: 1. Disc body; 11. Strip-shaped mounting through hole; 12. Bolt hole one; 13. Lower groove; 14. Hollowed-out through-hole; 15. Insertion foot; 16. Sinkhole; 17. Upper protrusion; 18. Bolt hole three; 2. Clamp; 21. Upper groove; 3. Columnar shell; 30. Sealing adhesive; 301. Connecting part; 302. Bolt hole two; 303. Sealing end; 304. Acoustic cavity; 305. Cylindrical snap-fit platform; 306. Snap-fit protrusion; 307. Embedded groove; 308. Water channel; 309. Positive sign; 310. Step; 311. Open end; 4. Multi-core corrosion-resistant cable; 5. Columnar fixing base; 501. Installation 502. Installation cavity 2; 503. Installation cavity 3; 504. Threaded connection hole; 505. Sealing platform; 506. External threaded plug; 507. Connecting post; 508. Annular convex ridge; 509. Threaded countersunk hole; 510. Injection head; 511. Wiring through hole; 512. Columnar protrusion; 6. Pressure bearing cylinder; 61. End cap; 611. Through hole; 62. Screw hole 1; 63. Screw hole 2; 7. Vibration sensor; 81. Impedance matching device; 82. Piezoelectric ceramic plate; 9. Acoustic protective cap; 901. Transition cavity; 902. First groove; 903. Second groove; 904. Annular inner groove; 905. Insertion notch. Detailed Implementation
[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0032] Example 1:
[0033] This embodiment provides a counterweight chassis, based on Figure 1 and Figure 2As shown, the device includes a disk body 1 and a clamping ring 2. The disk body 1 has a strip-shaped mounting hole 11 for accommodating the seabed sensing and acquisition device. Several bolt holes 12 are distributed on both sides of the strip-shaped mounting hole 11 on the disk body 1. The seabed sensing and acquisition device can be horizontally placed inside the strip-shaped mounting hole 11 and fixedly connected to the counterweight base by bolts to the bolt holes 12. One end of the strip-shaped mounting hole 11 has a lower groove 13, and the middle of the clamping ring 2 has an upper groove 21. Both ends of the clamping ring 2 are bolted to the top of the disk body 1. Specifically, bolt holes 18 are provided on both sides of the lower groove 13 on the disk body 1, and bolt holes 18 are also provided on both sides of the upper groove 21 on the clamping ring 2, respectively aligned with the two bolt holes 18. The bolt holes at both ends of the clamping ring 2 are bolted to the two bolt holes 18 of the disk body 1. After connection, the upper groove 21 is fastened to the top of the lower groove 13. In actual use, the root of the cable leading out from the seabed sensing and acquisition device is clamped and fastened by the upper groove 21 and the lower groove 13 to ensure stability. The surface of the disc body 1 has several perforated openings 14, and the bottom of the disc body 1 has several insertion feet 15. Here, "several insertion feet 15" means at least two. In this embodiment, there are four insertion feet 15, all of which are semi-circular in structure.
[0034] In this embodiment, the disc body 1 is made using a casting process, with multiple cast iron spokes interconnected to form several hollowed-out openings 14 and a strip-shaped mounting through hole 11. The clamp 2 is made of stamped stainless steel plate. The counterweight base is used to fix the seabed sensing and acquisition device with vibration sensor 7 inside. Since the vibration sensor 7 is directional, if the seabed sensing and acquisition device deflects with the water flow in the water, it will cause inaccurate information collection. The counterweight base achieves an overall counterweight increase effect, and after the seabed sensing and acquisition device is installed in the strip-shaped mounting through hole 11, it can ensure the stability of the seabed sensing and acquisition device's position in the water. The hollowed-out openings 14 can ensure the overall sand penetration effect, so as to facilitate quick coupling into the mud and sand and easy pulling out of the mud and sand. When the seabed sensing and acquisition device assembly is placed on the seabed, the insertion feet 15 sink into the mud and sand. At this time, the bottom surface of the seabed sensing and acquisition device is in direct contact with the seabed through the strip-shaped mounting through hole 11 to receive vibration signals and ensure accurate signal reception. The insertion foot 15, which is embedded in the mud and sand, enables good coupling between the seabed sensing and acquisition device assembly and the seabed, further increasing stability.
[0035] Furthermore, several pits 16 are distributed on the top of both sides of the strip-shaped mounting hole 11 on the disk body 1, and each pit 16 has a bolt hole 12 at its bottom. Here, "several" means at least one, that is, there is at least one pit 16 on each side of the strip-shaped mounting hole 11. In this embodiment, two pits 16 are provided on each side of the strip-shaped mounting hole 11, for a total of four pits 16. Correspondingly, the outer shell of the seabed sensing and acquisition device is provided with four connecting parts 301, each corresponding to the shape and position of one of the four pits 16. The connecting parts 301 are engaged inside the pits 16 for easy alignment. Subsequently, the connecting parts 301 are bolted to the bolt holes 12 in the pits 16 to fix the seabed sensing and acquisition device. Simultaneously, several upper protrusions 17 are evenly distributed around the top circumference of the disk body 1, and several insertion legs 15 are evenly distributed around the bottom circumference of the disk body 1. Here, "several" means at least two. In this embodiment, there are four upper protrusions 17. Because the cable of the seabed sensing and acquisition device is quite long, it will be spirally placed on top of the disc 1 during transportation, and the edge of the cable will be blocked by the upper protrusion 17 to prevent it from spreading out.
[0036] Example 2:
[0037] This embodiment provides a seabed sensing and acquisition device assembly, based on... Figure 2 and Figure 3 As shown, the system includes a seabed sensing and acquisition device and a counterweight chassis as described in Embodiment 1. The seabed sensing and acquisition device includes a cylindrical shell 3, a multi-core corrosion-resistant cable 4, and a three-component vibration sensor assembly. The three-component vibration sensor assembly is fixedly installed inside the cylindrical shell 3. The multi-core corrosion-resistant cable 4 is introduced into the cylindrical shell 3 from the outer side of its end, and the core of the multi-core corrosion-resistant cable 4 is connected to the three-component vibration sensor assembly. Several connecting parts 301 are distributed on both sides of the outer wall of the cylindrical shell 3, and each connecting part 301 has a bolt hole 302. The number and shape of the connecting parts 301 are the same as the number and shape of the sinkhole 16. During installation, the seabed sensing and acquisition device is placed horizontally in the strip-shaped mounting through hole 11. The bolt holes 302 and 12 are aligned one by one and connected to each other by bolts. The multi-core corrosion-resistant cable 4 is introduced into the root of the cylindrical shell 3 and clamped in the upper groove 21 and lower groove 13, thereby achieving a fixed connection between the seabed sensing and acquisition device and the counterweight chassis.
[0038] In use, the disc 1 is embedded in the seabed, with its insertion feet 15 inserted into the sediment. The bottom of the cylindrical housing 3 extends outwards through a strip-shaped mounting hole 11, directly contacting the seabed. Vibrations from the seabed are transmitted directly to the internal three-component vibration sensor assembly via the cylindrical housing 3. Upon receiving the signal, the three-component vibration sensor assembly transmits it to the outside via a multi-core corrosion-resistant cable 4. Due to the added weight of the disc 1 and the stabilizing effect of the insertion feet 15, the orientation of the three-component vibration sensor assembly remains stable in the water, ensuring accurate data collection. Simultaneously, a positive orientation mark 309 is provided on the outer wall of the cylindrical housing 3 to ensure correct installation orientation.
[0039] based on Figures 3 to 6 As shown, the three-component vibration sensor assembly includes a cylindrical fixed base 5, a pressure-bearing cylinder 6, and three sets of vibration sensors 7. The cylindrical fixed base 5 has mounting cavities 501 and 502 on its sidewalls and a third mounting cavity 503 at its end. The extension directions of mounting cavities 501, 502, and 503 are perpendicular to each other. The three sets of vibration sensors 7 are fixedly installed in mounting cavities 501, 502, and 503 respectively, arranged perpendicularly to each other. Since the vibration sensors 7 have directional detection capabilities, the three sets of perpendicular vibration sensors 7 form a Cartesian coordinate system, enabling them to sense vibration signals in all directions. The pressure-bearing cylinder 6 is fixedly sleeved on the outside of the cylindrical fixed base 5 and is fixedly installed inside the cylindrical shell 3. The cylindrical shell 3 has an open end 311, through which the pressure-bearing cylinder 6 is inserted. A multi-core corrosion-resistant cable 4 extends from the end of the cylindrical fixing base 5 furthest from the mounting cavity 503 and enters the cylindrical fixing base 5. The cores of the multi-core corrosion-resistant cable 4 are connected to the three sets of vibration sensors 7. During installation, the mounting cavity 503 is inserted into the cylindrical housing 3 from the open end 311, and the multi-core corrosion-resistant cable 4 is introduced into the cylindrical housing 3 from the open end 311. The multi-core corrosion-resistant cable 4 is a cable with multiple cores, used to connect to the electronic components in the seabed sensing and acquisition device. To ensure cable routing, a cable routing hole 511 is provided along the axial direction of the cylindrical fixing base 5. The cable routing hole 511 passes through the first mounting cavity 501, the second mounting cavity 502, and the third mounting cavity 503 so that the cores can be connected to the three sets of vibration sensors 7 respectively.
[0040] The cylindrical fixing base 5 has three sets of threaded connection holes 504 on its side wall. These three sets of threaded connection holes 504 extend from the side into mounting cavities 1 (501), 2 (502), and 3 (503), respectively. Three sets of vibration sensors 7 are fixedly installed in mounting cavities 1 (501), 2 (502), and 3 (503) by screws that pass through the three sets of threaded connection holes 504. If the side wall of the vibration sensor 7 has corresponding screw holes, it can be directly screwed in for fixation. If the side wall of the vibration sensor 7 does not have screw holes, the vibration sensor 7 can be pressed against the screw by the end of the screw. The end of the cylindrical fixing base 5 away from mounting cavity 3 (503) has a sealing platform 505, which seals the end of the pressure-bearing cylinder 6. The pressure-bearing cylinder 6 and the sealing platform 505 are connected by screws. Specifically, screw holes 63 are provided around the circumference of the sealing platform 505 and the pressure cylinder 6, and after the sealing platform 505 seals the end of the pressure cylinder 6, the screw holes 63 of the two are aligned with each other and connected to each other by screws.
[0041] based on Figure 2 , Figure 4 , Figure 7 and Figure 8As shown, it also includes an external threaded plug 506. A connecting post 507 extends from the side of the sealing platform 505 away from the mounting cavity 501, and a plurality of annular protrusions 508 are distributed on the outer wall of the connecting post 507. Here, "a plurality of" means at least two. In this embodiment, there are three annular protrusions 508. A threaded countersunk hole 509 is formed at the end of the connecting post 507 away from the sealing platform 505. The external threaded plug 506 is fitted onto the outside of the multi-core corrosion-resistant cable 4 and screwed into the threaded countersunk hole 509. The threaded countersunk hole 509 directly connects to the cable routing hole 511. The outer wall of the multi-core corrosion-resistant cable 4 can be fixed to the inside of the external threaded plug 506 by bonding or interference fit. When the external threaded plug 506 is screwed into the threaded countersunk hole 509, the multi-core corrosion-resistant cable 4 can be fixed. The outer side of the connecting post 507 is covered by an injection head 510. The injection head 510 seals the connection points between the multi-core corrosion-resistant cable 4, the external threaded plug 506, and the threaded countersunk hole 509, and also seals the connection points between the cylindrical shell 3, the pressure-bearing cylinder 6, and the sealing platform 505. Specifically, during production, the assembled product is placed on an injection molding machine, and the injection head 510 is generated through injection molding. After solidification, the injection head 510 completely seals the external threaded plug 506, the connecting post 507, the ends of the cylindrical shell 3, the ends of the pressure-bearing cylinder 6, and the ends of the sealing platform 505, as well as the gaps between them, achieving a sealed product. During injection, the material enters the gaps between the annular ridges 508, ensuring the stability of the injection head 510. The injection head 510 has an integrally formed columnar protrusion 512 at its end. The root of the multi-core corrosion-resistant cable 4 passes through the columnar protrusion 512, which is clamped between the upper groove 21 and the lower groove 13. This ensures a stable connection.
[0042] Furthermore, based on Figure 4 , Figure 6 , Figure 9 and Figure 10As shown, it also includes an impedance matching device 81 and a piezoelectric ceramic plate 82. The end of the pressure-bearing cylinder 6 away from the injection head 510 is sealed with an end cap 61 by screws. Specifically, screw holes 62 are provided around both the end cap 61 and the pressure-bearing cylinder 6, one after the other. After the end cap 61 is fastened to the end of the pressure-bearing cylinder 6, the screw holes 62 are aligned and connected to each other by screws. The end of the cylindrical shell 3 away from the injection head 510 is a sealing end 303. The interior of the sealing end 303 and the end cap 61 form an acoustic cavity 304, which is filled with encapsulating adhesive 30. The impedance matching device 81 and the piezoelectric ceramic plate 82 are both submerged in the encapsulating adhesive 30 and fixed inside the solidified encapsulating adhesive 30. In this embodiment, the cylindrical shell 3 is injection molded from corrosion-resistant polyurethane material. The encapsulating adhesive 30 is made of polyurethane material, but epoxy resin material can also be used. During production, encapsulating adhesive 30 is first injected into the acoustic cavity 304. Before the encapsulating adhesive 30 solidifies, the piezoelectric ceramic sheet 82 and the impedance matching device 81 are submerged in the encapsulating adhesive 30. The end of the pressure-bearing cylinder 6 is sealed by the end cap 61, and the end of the pressure-bearing cylinder 6 with the end cap 61 is inserted into the cylindrical housing 3 from the open end 311 before the encapsulating adhesive 30 solidifies, with the end cap 61 in contact with the encapsulating adhesive 30. After the encapsulating adhesive 30 solidifies, the end cap 61 can be glued and fixed. To ensure the accurate positioning of the pressure-bearing cylinder 6, the interior of the cylindrical housing 3 has a step 310, and the end cap 61 abuts against and limits the position of the step 310. After the encapsulating adhesive 30 solidifies, the piezoelectric ceramic sheet 82 and the impedance matching device 81 can be fixed in the acoustic cavity 304. Part of the core of the multi-core corrosion-resistant cable 4 passes through the end cap 61 and is connected to the secondary winding of the impedance matching device 81. The primary winding of the impedance matching device 81 is connected to the piezoelectric ceramic sheet 82 through a wire. Specifically, in this embodiment, the end cap 61 has a through hole 611, which connects the acoustic cavity 304 and the pressure-bearing cylinder 6. The core of the multi-core corrosion-resistant cable 4, which is connected to the piezoelectric ceramic sheet 82, passes through the through hole 611 into the acoustic cavity 304 to connect with the impedance matching device 81 and the piezoelectric ceramic sheet 82. The through hole 611 is small in size, so the high-viscosity encapsulating adhesive 30 will not flow into the pressure-bearing cylinder 6 through the through hole 611.
[0043] The piezoelectric ceramic element 82 is used to collect acoustic wave information in water. During use, the acoustic waves in the water are completely transmitted to the piezoelectric ceramic element 82 through the cylindrical housing 3 and the solidified encapsulating adhesive 30, ensuring detection accuracy. After sensing a pressure signal, the piezoelectric ceramic element 82 converts its charge change into a voltage through an impedance matching device 81, and then the signal is transmitted to the outside by the cores of the multi-core corrosion-resistant cable 4. Because the solidified encapsulating adhesive 30 fixes the position of the piezoelectric ceramic element 82, no additional fixing structure is required, nor is liquid sealing necessary, greatly simplifying the overall device structure and reducing production costs and difficulty.
[0044] Furthermore, an acoustic protective cap 9 is fixedly fitted onto the outer side of the sealing end 303, forming a transition cavity 901 between the acoustic protective cap 9 and the outer wall of the sealing end 303. The piezoelectric ceramic sheet 82 is placed upright inside the acoustic cavity 304. The side wall of the acoustic protective cap 9 has two sets of first slots 902 and two sets of second slots 903 communicating with the transition cavity 901. The two sets of first slots 902 are respectively positioned opposite the left and right sides of the piezoelectric ceramic sheet 82, and the two sets of second slots 903 are respectively positioned opposite the upper and lower edges of the piezoelectric ceramic sheet 82. In this embodiment, there are six second slots 903, arranged in groups of three, each located along the edge of the piezoelectric ceramic sheet 82. Due to the complex environment in water, the acoustic protective cap 9, fastened to the outside of the sealing end 303, prevents debris in the water from directly colliding with the outer wall of the sealing end 303, thus preventing leakage from the acoustic cavity 304. Water flows into the transition cavity 901 through the first slots 902 and the second slots 903. The first slot 902 has a relatively large opening area. The two sides of the piezoelectric ceramic sheet 82 act as pressure-receiving surfaces to receive sound wave signals. The large area of the first slot 902 ensures that the sound waves pass through completely, reducing sound wave loss. Since the first slot 902 faces the surface of the piezoelectric ceramic sheet 82, the sound waves, after passing through the first slot 902, propagate vibrations within the transition cavity 901 to the sealing end 303, and then to the surface of the piezoelectric ceramic sheet 82 within the acoustic cavity 304, ensuring accurate detection data. The first slot 902 and the second slot 903 ensure water flow within the transition cavity 901. In water rich in sediment, sediment deposited in the transition cavity 901 can be discharged from the second slot 903 at the bottom, preventing sediment accumulation and blockage of the transition cavity 901.
[0045] In this embodiment, a cylindrical locking platform 305 is provided on the outer wall of the sealing end 303, and a locking protrusion 306 is provided on the outer wall of the cylindrical locking platform 305. An annular inner groove 904 is provided on the inner wall of the acoustic protective cap 9. An insertion notch 905 communicating with the annular inner groove 904 is opened at the end of the acoustic protective cap 9. The acoustic protective cap 9 is sleeved on the outer side of the cylindrical locking platform 305. The locking protrusion 306 is inserted into the annular inner groove 904 from the insertion notch 905, and the locking protrusion 306 is rotated into the annular inner groove 904 by interference fit. Both the cylindrical shell 3 and the acoustic protective cap 9 are injection molded from corrosion-resistant polyurethane material, which has a certain degree of elasticity. The size of the locking protrusion 306 is slightly larger than the size of the annular inner groove 904. Through a certain elastic deformation, the locking protrusion 306 is pressed into the annular inner groove 904 to ensure a stable connection.
[0046] Optionally, the piezoelectric ceramic sheet 82 has several sets. Here, "several sets" means at least two sets. The acoustic cavity 304 has several grooves 307 corresponding to the piezoelectric ceramic sheet 82 one by one. The grooves 307 are arranged linearly and at intervals. The piezoelectric ceramic sheet 82 is inserted into the corresponding groove 307 one by one. A water channel 308 is provided on the outside of the sealing end 303, passing through any two adjacent grooves 307. Specifically, in this embodiment, there are two sets of piezoelectric ceramic sheets 82, corresponding to two grooves 307 in the acoustic cavity 304. Of course, the number of piezoelectric ceramic sheets 82 and grooves 307 can be set to three or four, etc., depending on the actual situation. Specifically, during installation, the encapsulating adhesive 30 fills the acoustic cavity 304 and the grooves 307 inside, and then the piezoelectric ceramic sheet 82 is placed into the groove 307, with the two sets of piezoelectric ceramic sheets 82 parallel to each other. In order to avoid the opposite surfaces of adjacent piezoelectric ceramic sheets 82 not receiving sound waves, a water channel 308 is provided between two adjacent grooves 307. The water entering the transition cavity 901 can also enter the water channel 308. The sound waves are transmitted from the water channel 308 to the wall of the sealing end 303 and to the surface of the piezoelectric ceramic sheet 82.
[0047] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A counterweight chassis, characterized in that: The device includes a disc body and a clamping ring. The disc body has a strip-shaped mounting hole for accommodating a seabed sensing and acquisition device. Several bolt holes are distributed on both sides of the strip-shaped mounting hole. One end of the strip-shaped mounting hole has a lower groove. The middle of the clamping ring has an upper groove. Both ends of the clamping ring are bolted to the top of the disc body. The upper groove is fastened to the top of the lower groove. Several hollow openings are distributed on the surface of the disc body. Several insertion feet are distributed on the bottom of the disc body.
2. The counterweight chassis as described in claim 1, characterized in that: The disc body has several recesses distributed on the top of both sides of the strip-shaped mounting hole, and each recess has a bolt hole at the bottom.
3. The counterweight chassis as described in claim 1 or 2, characterized in that: Several upper protrusions are evenly distributed around the top of the disc, and several insertion legs are evenly distributed around the bottom of the disc.
4. A seabed sensing and data acquisition device assembly, characterized in that: The device includes a seabed sensing and acquisition device and a counterweight chassis as described in claim 1, 2 or 3. The seabed sensing and acquisition device includes a cylindrical shell, a multi-core corrosion-resistant cable and a three-component vibration sensor assembly. The three-component vibration sensor assembly is fixedly installed inside the cylindrical shell. The multi-core corrosion-resistant cable is introduced into the cylindrical shell from the outside of the end of the cylindrical shell. The core of the multi-core corrosion-resistant cable is connected to the three-component vibration sensor assembly. Several connecting parts are distributed on both sides of the outer side wall of the columnar shell. Each connecting part is provided with bolt hole 2. The seabed sensing and acquisition device is placed in the strip-shaped mounting through hole. Bolt hole 2 is aligned with bolt hole 1 and connected to each other by bolts. The multi-core corrosion-resistant cable is introduced into the root of the columnar shell and clamped in the upper groove and the lower groove.
5. The seabed sensing and acquisition device assembly as described in claim 4, characterized in that: The three-component vibration sensor assembly includes a cylindrical fixed base, a pressure-bearing cylinder, and three sets of vibration sensors. The cylindrical fixed base has a first mounting cavity and a second mounting cavity on its side wall, and a third mounting cavity on its end. The extension directions of the first, second, and third mounting cavities are perpendicular to each other. The three sets of vibration sensors are respectively fixedly installed in the first, second, and third mounting cavities, and the three sets of vibration sensors are arranged perpendicular to each other. The pressure-bearing cylinder is fixedly sleeved on the outside of the cylindrical fixed base. The pressure-bearing cylinder is fixedly installed inside the cylindrical shell. The multi-core corrosion-resistant cable extends from the end of the cylindrical fixed base away from the mounting cavity and passes through the cylindrical fixed base. The core of the multi-core corrosion-resistant cable is connected to the three sets of vibration sensors.
6. The seabed sensing and acquisition device assembly as described in claim 5, characterized in that: The cylindrical fixing base has three sets of threaded connection holes on its side wall. The three sets of threaded connection holes extend from the side to the first mounting cavity, the second mounting cavity, and the third mounting cavity, respectively. The three sets of vibration sensors are fixedly installed in the first mounting cavity, the second mounting cavity, and the third mounting cavity by screws that screw through the three sets of threaded connection holes. The end of the cylindrical fixing base away from the third mounting cavity has a sealing platform. The sealing platform seals the end of the pressure-bearing cylinder. The pressure-bearing cylinder and the sealing platform are connected by screws.
7. The seabed sensing and acquisition device assembly as described in claim 6, characterized in that: It also includes an external threaded plug. A connecting post extends from the side of the sealing platform away from the mounting cavity. Several annular protrusions are distributed on the outer side wall of the connecting post. A threaded countersunk hole is opened at the end of the connecting post away from the sealing platform. The external threaded plug is sleeved on the outside of the multi-core corrosion-resistant cable and screwed into the threaded countersunk hole. An injection head covers the outside of the connecting post. The injection head seals the connection between the multi-core corrosion-resistant cable, the external threaded plug, and the threaded countersunk hole. The injection head also seals the connection between the columnar shell, the pressure-bearing cylinder, and the sealing platform. The end of the injection head is integrally formed with a columnar protrusion, the root of the multi-core corrosion-resistant cable passes through the columnar protrusion, and the columnar protrusion is sandwiched between the upper groove and the lower groove.
8. The seabed sensing and acquisition device assembly as described in claim 7, characterized in that: It also includes an impedance matching device and a piezoelectric ceramic plate. The end of the pressure-bearing cylinder away from the injection head is sealed with an end cap by screws. The end of the cylindrical shell away from the injection head is a sealed end. The interior of the sealed end and the end cap form an acoustic cavity. The acoustic cavity is filled with encapsulating adhesive. The impedance matching device and the piezoelectric ceramic plate are both submerged in the encapsulating adhesive and fixed inside the solidified encapsulating adhesive. Some cores of the multi-core corrosion-resistant cable pass through the end cap and are connected to the secondary winding of the impedance matching device. The primary winding of the impedance matching device is connected to the piezoelectric ceramic plate through a wire.
9. The seabed sensing and acquisition device assembly as described in claim 8, characterized in that: An acoustic protective cap is fixedly sleeved on the outer side of the sealing end. A transition cavity is formed between the acoustic protective cap and the outer side wall of the sealing end. The piezoelectric ceramic sheet is placed upright in the acoustic cavity. The side wall of the acoustic protective cap has two sets of first slots and two sets of second slots that communicate with the transition cavity. The two sets of first slots are respectively facing the left and right side surfaces of the piezoelectric ceramic sheet, and the two sets of second slots are respectively facing the upper and lower side edges of the piezoelectric ceramic sheet.
10. The seabed sensing and acquisition device assembly as described in claim 9, characterized in that: The piezoelectric ceramic sheet is in several groups, and the acoustic cavity has several grooves that correspond one-to-one with the piezoelectric ceramic sheet. The grooves are arranged linearly and at intervals. The piezoelectric ceramic sheet is embedded into the corresponding groove one by one. A water channel is opened on the outside of the sealing end, which passes through any two adjacent grooves.