Ocean engineering foundation scouring ultrasonic monitoring equipment based on ultrasonic waveguide

Abstract

The invention relates to the technical field of ocean engineering foundation scouring monitoring, and discloses ocean engineering foundation scouring ultrasonic monitoring equipment based on an ultrasonic waveguide, which comprises a waterproof electronic sealed cabin arranged on the water, the ultrasonic waveguide of which one end is connected with the sealed cabin and extends underwater, and an ultrasonic radiation head fixed at the underwater end of the ultrasonic waveguide. In the working process, the PZT-5A piezoelectric array located in the waterproof electronic sealed cabin excites the ultrasonic waveguide to generate torsional vibration mode guided waves; after realizing cross-sea-surface low-loss transmission along the wall of the ultrasonic conduit, the guided waves are efficiently converted into directional detection sound waves through a plurality of acoustic impedance matching layers in the ultrasonic radiation head and are radiated to the periphery of an underwater foundation; and the echo signal reflected by the scouring pit is transmitted back along the original path and is received and processed. All core electronic components are arranged on water, the problems of high-pressure sealing failure, seawater corrosion and the like are fundamentally avoided, the reliability of monitoring equipment is remarkably improved, and the service life of the monitoring equipment is remarkably prolonged.

Description

Technical Field

[0001] This invention relates to the field of marine engineering foundation scour monitoring technology, specifically to an ultrasonic monitoring device for marine engineering foundation scour based on ultrasonic guidance. Background Technology

[0002] With the advancement of the national "dual-carbon" strategic goals, the renewable energy industry, including offshore wind power and photovoltaic power generation, is experiencing rapid development. In this process, ensuring the structural safety and stable operation of marine engineering foundations (such as wind turbine foundations and photovoltaic piles) is crucial, and seabed erosion is one of the main factors threatening their safety. Therefore, real-time and accurate monitoring of the erosion status of marine engineering foundations is an indispensable and critical link in the safe operation and maintenance of facilities.

[0003] Currently, ultrasonic technology has become the mainstream technology in the field of scour monitoring due to its low propagation attenuation in seawater, good directionality, and mature technology. Existing ultrasonic monitoring solutions can be roughly divided into two categories: fixed and mobile. Fixed solutions typically install monitoring equipment directly on the engineering foundation. Although they have good resistance to hydrodynamic interference, the high cost of individual equipment and underwater installation makes it difficult to achieve economical and effective large-scale deployment in scenarios such as densely packed pile groups and large-scale offshore photovoltaic power plants. Mobile solutions rely on mobile platforms such as special patrol vessels or drones for periodic scanning. Although they have a wide coverage area, the equipment structure is often more complex, with weak resistance to strong water currents, and the cost of monitoring per operation is high. They cannot meet the real-time early warning needs for scour development, and their availability is greatly limited, especially in harsh sea conditions.

[0004] However, both traditional fixed and mobile monitoring solutions face a common and unavoidable technical bottleneck: their core electronic sensing components, such as sensors, sonar arrays, or fiber optic terminals, must be deployed long-term in the harsh underwater environment. This deployment method exposes the equipment to multiple challenges. Due to limitations in assembly processes and long-term operating conditions, the high-pressure sealing structure of the equipment is prone to failure, and seawater intrusion can quickly cause internal circuit boards to corrode and be damaged. Furthermore, the surface of detection equipment submerged in seawater inevitably suffers from marine organism attachment, which severely affects the transmission and reception of sound waves, significantly reducing detection accuracy and reliability. These problems collectively contribute to the high failure rate of existing underwater monitoring equipment, increasing not only the difficulty and cost of maintenance but, more importantly, compromising the continuity and reliability of monitoring data, failing to fully meet the stringent requirements of relevant design specifications that "triggering an early warning when the scour depth exceeds the design allowable value." Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an ultrasonic monitoring device for basic scour in marine engineering based on ultrasonic guidance. This solves the problem that the core electronic components of existing marine engineering scour monitoring devices must be kept underwater for extended periods, which leads to high-pressure seal failure, seawater corrosion, and marine organism attachment, resulting in high equipment failure rates and poor reliability.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an ultrasonic monitoring device for scour of marine engineering foundations based on ultrasonic guidance, comprising:

[0007] Waterproof electronic sealed chambers are suitable for installation on water;

[0008] One end of the ultrasonic waveguide is connected to the waterproof electronic sealing chamber, and the other end is adapted to extend underwater;

[0009] The ultrasonic radiating head is fixed to the underwater end of the ultrasonic conductor.

[0010] The waterproof electronic sealing chamber contains an electronic unit for generating excitation signals and processing echo signals. The electronic unit excites the ultrasonic waveguide to generate solid guided waves that propagate along it. The solid guided waves are converted into detection sound waves that are emitted underwater by the ultrasonic radiator, and the echo of the detection sound waves is received by the ultrasonic radiator.

[0011] Preferably, the solid guided wave is a torsional vibration mode guided wave propagating in the ultrasonic waveguide.

[0012] Preferably, the waterproof electronic sealed chamber is provided with a ring-shaped PZT-5A piezoelectric array, which is driven by the electronic unit to excite the ultrasonic waveguide to generate the torsional vibration mode guided wave.

[0013] Preferably, the electronic unit includes:

[0014] The drive unit is used to generate drive pulses;

[0015] A phase control unit is used to control each unit of the PZT-5A piezoelectric array to generate torsional torque according to the driving pulse;

[0016] The receiving unit is used to receive and process the echo electrical signal converted by the PZT-5A piezoelectric array.

[0017] Preferably, the ultrasonic radiating head includes a conversion layer, a transition layer, and a radiation layer sequentially connected to the ultrasonic wave guide end. The conversion layer, transition layer, and radiation layer together constitute a multilayer acoustic impedance matching structure for realizing the energy conversion between solid guided waves and liquid acoustic waves.

[0018] Preferably, the end of the ultrasonic waveguide has a tapered structure, and the transition layer cooperates with the tapered structure to increase the wavefront contact area of ​​the torsional wave and convert the shear stress generated by the torsional wave into a normal component, so as to excite the probe sound wave in the form of a longitudinal wave in the radiation layer.

[0019] Preferably, it further includes a protective housing, which is fitted over the outside of the ultrasonic conductor, and an air gap is formed between the protective housing and the ultrasonic conductor.

[0020] Preferably, the ultrasonic conductor is filled with a low-impedance filler material to reduce interference from reflected noise within the tube.

[0021] Preferably, the waterproof electronic sealing chamber is detachably fixed to the top of the ultrasonic conductor via a flange sealing structure.

[0022] An ultrasonic monitoring device for scour of marine engineering foundations based on ultrasonic guidance, the device further comprising clamps or riveting structures for fixing the device to the marine engineering foundation.

[0023] Working Principle: First, a specific electrical excitation signal is generated by the drive unit and phase control unit located in the waterproof electronically sealed chamber above the water surface. This signal drives the PZT-5A piezoelectric array to generate a torsional torque at the tip of the ultrasonic waveguide, thereby efficiently exciting a torsional vibration mode guided wave with concentrated energy and almost no dispersion. This solid guided wave, due to its unique physical properties, can achieve long-distance, low-loss transmission across the water-air interface along the wall of the ultrasonic waveguide, reaching a predetermined underwater depth. When the guided wave propagates to the ultrasonic radiating head at the end of the ultrasonic waveguide, its precisely designed multi-layered acoustic impedance matching layer and conical structure efficiently convert the high acoustic impedance solid guided wave energy into energy that can be used for... Directional sound waves propagate through low-impedance seawater and radiate around the seabed engineering foundation. The echo signal formed by the reflection of the sound waves after passing through structures such as seabed scour pits is captured by the same ultrasonic radiator and converted back into torsional vibration mode guided waves through its internal structure. Finally, the echo guided wave is transmitted back to the PZT-5A piezoelectric array on the water surface, where it is converted into an electrical signal through the inverse piezoelectric effect and processed by the receiving unit. By accurately analyzing the time difference between signal transmission and echo reception, the depth and morphological characteristics of the scour pit can be accurately and in real time. Thus, reliable monitoring of the scour status of marine engineering foundations is achieved without completely avoiding contact between core electronic components and seawater.

[0024] This invention provides an ultrasonic monitoring device for foundation scour in marine engineering based on ultrasonic guidance. It has the following beneficial effects:

[0025] 1. This invention integrates all core electronic components, including the PZT-5A piezoelectric array, drive unit, phase control unit, and receiver unit, into a waterproof electronically sealed chamber above the water surface. Utilizing ultrasonic waveguides as the energy transmission medium, it achieves complete physical isolation between the electronic components and the seawater medium. This design fundamentally solves the technical challenges of high failure rates, short lifespans, and high maintenance costs associated with traditional underwater monitoring equipment due to high-pressure seal failure, seawater corrosion, and marine organism attachment. It significantly improves the long-term reliability and environmental adaptability of the equipment.

[0026] 2. This invention utilizes torsional vibration mode guided waves excited within an ultrasonic waveguide for signal transmission. It fully leverages the physical characteristics of this mode guided wave—energy concentrated within the waveguide, virtually non-dispersion, and minimal leakage to the surrounding medium—to achieve low-loss, impedance-match-free transmission of sound wave energy across the water-air interface. This method not only ensures signal strength and waveform fidelity at the waveguide end but also avoids the risks of setting up complex matching devices in wave-beating areas, simplifying the equipment structure and improving the stability and safety of signal transmission.

[0027] 3. This invention utilizes an ultrasonic radiator head with a multi-layered acoustic impedance matching layer and a gentle cone structure at the underwater end of the ultrasonic waveguide. This structure efficiently converts torsional guided waves propagating in high acoustic impedance solids into liquid pressure waves propagating in low acoustic impedance seawater, achieving efficient energy conversion and mode conversion between solid guided waves and liquid acoustic waves. This significantly enhances the intensity of the probe sound field emitted towards the seabed foundation and the sensitivity of the received echo signal, providing high-quality raw signals for accurate and quantitative inversion of scour pit morphology and ensuring the accuracy of monitoring results. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a structural diagram of the waterproof electronic sealing chamber of the present invention;

[0030] Figure 3 This is a structural diagram of the ultrasonic radiator head of the present invention.

[0031] The components include: 1. Protective shell; 2. Ultrasonic radiating head; 3. Ultrasonic waveguide; 4. Low impedance filling material; 5. Signal transmission cable; 6. PZT-5A piezoelectric array; 7. Flange sealing structure; 8. Waterproof electronic sealing chamber; 9. Phase control unit; 10. Drive unit; 11. Receiver unit; 12. Conversion layer; 13. Radiation layer; and 14. Transition layer. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example:

[0034] Please see the appendix Figure 1 -Appendix Figure 3 This invention provides an ultrasonic monitoring device for scour of marine engineering foundations based on ultrasonic guidance, comprising:

[0035] Waterproof electronic sealed chamber 8, which is suitable for installation on water;

[0036] The ultrasonic conductor 3 has one end connected to the waterproof electronic sealing chamber 8, and the other end is adapted to extend underwater;

[0037] The ultrasonic radiating head 2 is fixed to the underwater end of the ultrasonic waveguide 3;

[0038] The waterproof electronic sealed chamber 8 contains an electronic unit for generating excitation signals and processing echo signals. The electronic unit excites the ultrasonic waveguide 3 to generate solid-state guided waves that propagate along it. These solid-state guided waves are converted into underwater detection waves by the ultrasonic radiator 2, and the echoes of these detection waves are received by the ultrasonic radiator 2. The solid-state guided waves are torsional vibration mode guided waves propagating in the ultrasonic waveguide 3. The waterproof electronic sealed chamber 8 is equipped with a ring-shaped PZT-5A piezoelectric array 6, which is driven by the electronic unit to excite the ultrasonic waveguide 3 to generate torsional vibration mode guided waves. The electronic unit includes:

[0039] Drive unit 10 is used to generate drive pulses;

[0040] Phase control unit 9 is used to control each unit of PZT-5A piezoelectric array 6 to generate torsional torque according to the drive pulse;

[0041] Receiving unit 11 is used to receive and process the echo electrical signal converted by PZT-5A piezoelectric array 6.

[0042] The ultrasonic radiating head 2 includes a conversion layer 12, a transition layer 14, and a radiation layer 13 sequentially connected to the end of the ultrasonic guide 3. The conversion layer 12, the transition layer 14, and the radiation layer 13 together constitute a multi-layer acoustic impedance matching structure for realizing the energy conversion between solid guided waves and liquid acoustic waves. The end of the ultrasonic guide 3 has a gentle cone structure. The transition layer 14 cooperates with the gentle cone structure to increase the wavefront contact area of ​​the torsional wave and convert the shear stress generated by the torsional wave into a normal component to excite longitudinal wave detection sound waves in the radiation layer 13. It also includes a protective shell 1, which is fitted over the outside of the ultrasonic guide 3 and forms an air gap between the protective shell 1 and the ultrasonic guide 3. The interior of the ultrasonic guide 3 is filled with a low-impedance filling material 4 to weaken the interference of reflected clutter inside the tube. The waterproof electronic sealing chamber 8 is detachably fixed to the top of the ultrasonic guide 3 through a flange sealing structure 7.

[0043] The device mainly includes a waterproof electronic sealed chamber 8 installed on the water, an ultrasonic waveguide 3 connected to the sealed chamber at one end and extending underwater, and an ultrasonic radiator 2 fixed to the underwater end of the ultrasonic waveguide 3. During operation, the waterproof electronic sealed chamber 8, located in a safe environment on the water, generates an excitation signal. This signal drives the ultrasonic waveguide 3 to generate a special solid-state guided wave. This solid-state guided wave propagates efficiently along the wall of the ultrasonic waveguide 3 to the underwater end. Subsequently, the ultrasonic radiator 2 at the underwater end acts as an energy converter, converting the received solid-state guided wave into a detection sound wave capable of propagating in seawater and directionally transmitting it to scan the area around the seabed foundation. When the sound waves encounter structures such as seabed scour pits and are reflected, the resulting echo signal is captured again by the ultrasonic radiator 2 and converted into a solid guided wave. This wave is then transmitted back to the waterproof electronic sealed chamber 8 above the water for processing and analysis. The solid guided wave is a torsional vibration mode guided wave. The reason for choosing a torsional vibration mode such as the T(0,1) mode is because of its unique physical characteristics: First, the energy of this mode is mainly concentrated inside the waveguide wall, and the vibration displacement is the shear torsion of the wall. It hardly produces any displacement perpendicular to the wall surface. Therefore, when it passes through the water-air interface or propagates underwater, almost no energy will leak into the surrounding air or water medium.Secondly, torsional vibration mode guided waves have near-dispersion-free characteristics, meaning that the wave velocities of different frequency components are basically the same. This prevents the waveform from undergoing severe broadening and distortion after long-distance propagation, which is crucial for subsequent signal processing and ensuring the energy concentration of the terminal acoustic radiation. A ring-shaped PZT-5A piezoelectric array 6 is installed inside the chamber, closely attached to the inner or outer wall of the top of the ultrasonic guide 3. This array consists of multiple piezoelectric units and is precisely controlled by an electronic unit inside the chamber. The electronic unit specifically includes a drive unit 10, a phase control unit 9, and a receiving unit 11. During operation, the drive unit 10 first releases a switching pulse as a trigger signal for the entire excitation process. After receiving this pulse, the phase control unit 9 generates a modulated... A sinusoidal voltage signal with a specific phase difference is applied to the corresponding unit of the PZT-5A piezoelectric array 6. Based on the d15 inverse piezoelectric effect of the piezoelectric material, each piezoelectric unit generates tangential shear deformation under the action of the electric field. These deformations together form a pure torsional moment on the cross section of the ultrasonic waveguide 3, thereby efficiently exciting a pure torsional vibration mode guided wave. The echo signal reception process is the opposite. When the echo guided wave returns, the PZT-5A piezoelectric array 6 converts it into a weak echo electrical signal, which is collected by the phase control unit 9 and sent to the receiving unit 11 for subsequent amplification, filtering and analysis. The core of the ultrasonic radiating head 2 is a multi-layer acoustic impedance matching structure, which includes, in sequence, a multi-layer acoustic impedance matching structure tightly integrated with the end of the ultrasonic waveguide 3. The acoustic impedance of the three layers—conversion layer 12, transition layer 14, and outermost radiation layer 13—is carefully designed to form a gradient transition, aiming to minimize acoustic wave reflection caused by impedance abrupt changes, thereby transferring more energy from the ultrasonic waveguide 3 into the seawater. Furthermore, to maximize the utilization of torsional wave energy, the end of the ultrasonic waveguide 3 is processed into a gently conical structure. The transition layer 14 precisely matches this gently conical structure. When the torsional wave propagates to this point, the inclined structure significantly increases the contact area between the wavefront and the matching layer, and cleverly decomposes the pure shear stress generated by the torsional wave within the tube wall into a normal component perpendicular to the inclined surface. This normal component can effectively excite longitudinal wave detection in the subsequent radiation layer 13. The protective outer shell 1 is coaxially fitted around the ultrasonic wave guide 3. Its top end is connected to the flange sealing structure 7, and its bottom end is welded and sealed to the ultrasonic wave guide 3. This naturally forms an extremely thin air gap between the two. The air gap has extremely low acoustic impedance and acts as an acoustic isolation layer. It can effectively prevent the guided wave energy in the ultrasonic wave guide 3 from leaking radially in the underwater part, ensuring that the energy is confined to the maximum extent and conducted to the ultrasonic radiation head 2 at the end. At the same time, it can also provide physical protection for the internal ultrasonic wave guide 3. The internal cavity of the ultrasonic wave guide 3 is filled with a low impedance filling material 4. This material is preferably a lightweight low impedance material such as rigid foam, which can effectively absorb and weaken various reflected noises that may be generated in the tube and purify the signal propagation path.It can also provide some support to the pipe wall, helping to balance the external hydrostatic pressure in deep water areas and enhancing the structural strength and stability of the ultrasonic waveguide 3. The connection between the waterproof electronic sealing chamber 8 and the ultrasonic waveguide 3 is preferably a flange sealing structure 7. This structure, fastened with bolts, not only provides a reliable mechanical connection and waterproof seal, but more importantly, it allows the waterproof electronic sealing chamber 8, containing all core electronic components, to be disassembled and replaced as an independent module without moving or modifying the underwater parts already fixed to the engineering foundation, namely the ultrasonic waveguide 3 and the ultrasonic radiation head 2, greatly reducing the difficulty and cost of later maintenance.

[0044] Please see the appendix Figure 1 -Appendix Figure 3 An ultrasonic monitoring device for scour of marine engineering foundations based on ultrasonic guide 3, the device also includes clamps or riveting structures for fixing the device to the marine engineering foundation.

[0045] In practical applications, the equipment must form a strong mechanical coupling with the monitored marine engineering foundation, such as offshore wind turbine piles or photovoltaic power station piles, to eliminate interference caused by the equipment's own shaking or displacement on the monitoring data, thereby ensuring the accuracy of the measurement results. Therefore, the equipment is equipped with clamps or riveting structures to achieve reliable fixation on the marine engineering foundation. When long-term fixed monitoring of a specific offshore wind turbine pile is required, the monitoring equipment of this invention needs to be installed as a whole on the side wall of the pile foundation and fixed using a clamp structure. The clamps are usually ring-shaped clamps made of high-strength corrosion-resistant metals such as stainless steel. During installation, workers can vertically attach the monitoring equipment close to a predetermined position on the side wall of the pile foundation, and then simultaneously wrap one or more clamps around the equipment and the pile foundation. Finally, the clamps are locked using a tightening mechanism such as bolts. The significant advantage of this installation method is its convenience and non-destructive nature; the entire process does not require drilling or welding on the pile foundation. It will not damage the original structure and anti-corrosion layer of the pile foundation, making it particularly suitable for marine engineering projects that have already been built and are in operation. At the same time, the clamp fixing method also facilitates the later adjustment of the equipment position or disassembly and maintenance. In scenarios where more permanent and firm fixing is required, a riveting structure can be used. This method usually involves reserving a special mounting flange or ear plate on the protective shell 1 of the equipment, with riveting holes on the plate. During installation, holes need to be drilled at the corresponding positions on the marine engineering foundation first, then the mounting flange of the equipment is aligned with the pile foundation, and finally the two are riveted together using high-strength rivets. The riveting forms a permanent connection with extremely strong vibration and impact resistance, ensuring that the monitoring equipment remains stable under the long-term action of harsh sea conditions such as strong currents and large waves, eliminating any slight relative displacement. By adopting the above-mentioned clamp or riveting structure, the monitoring equipment of this invention can be rigidly connected to the monitored object, and its own attitude and position remain constant relative to the engineering foundation. Therefore, when the device is working, the time delay changes measured by the ultrasonic radiator 2 transmitting and receiving sound waves can truly and uniquely reflect the distance changes between the probe and the seabed, that is, the scouring or silting state of the seabed.

[0046] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A marine engineering foundation scour ultrasonic monitoring device based on ultrasonic guidance, characterized in that, include: Waterproof electronic sealed chamber (8) is suitable for installation on water; One end of the ultrasonic conductor (3) is connected to the waterproof electronic sealing chamber (8), and the other end is adapted to extend underwater; The ultrasonic radiating head (2) is fixed to the underwater end of the ultrasonic waveguide (3); The waterproof electronic sealing chamber (8) is equipped with an electronic unit for generating excitation signals and processing echo signals. The electronic unit excites the ultrasonic waveguide (3) to generate solid guided waves that propagate along it. The solid guided waves are converted into detection sound waves that are emitted underwater by the ultrasonic radiator (2), and the echo of the detection sound waves is received by the ultrasonic radiator (2).

2. The ultrasonic monitoring device for scour of marine engineering foundations based on ultrasonic guidance according to claim 1, characterized in that, The solid guided wave is a torsional vibration mode guided wave that propagates in the ultrasonic guide (3).

3. The ultrasonic monitoring device for scour of marine engineering foundations based on ultrasonic guidance according to claim 2, characterized in that, The waterproof electronic sealed chamber (8) is provided with a ring-shaped PZT-5A piezoelectric array (6), which is driven by the electronic unit to excite the ultrasonic waveguide (3) to generate the torsional vibration mode guided wave.

4. The ultrasonic monitoring device for scour of marine engineering foundations based on ultrasonic guidance according to claim 3, characterized in that, The electronic unit includes: A drive unit (10) is used to generate drive pulses; A phase control unit (9) is used to control each unit of the PZT-5A piezoelectric array (6) to generate torsional torque according to the driving pulse; The receiving unit (11) is used to receive and process the echo electrical signal converted by the PZT-5A piezoelectric array (6).

5. The ultrasonic monitoring device for scour of marine engineering foundations based on ultrasonic guidance according to claim 1, characterized in that, The ultrasonic radiating head (2) includes a conversion layer (12), a transition layer (14) and a radiation layer (13) connected sequentially to the end of the ultrasonic waveguide (3). The conversion layer (12), the transition layer (14) and the radiation layer (13) together constitute a multilayer acoustic impedance matching structure for realizing the energy conversion between solid guided waves and liquid acoustic waves.

6. The ultrasonic monitoring device for scour of marine engineering foundations based on ultrasonic guidance according to claim 5, characterized in that, The end of the ultrasonic guide (3) has a soft cone structure. The transition layer (14) cooperates with the soft cone structure to increase the wavefront contact area of ​​the torsional wave and convert the shear stress generated by the torsional wave into a normal component, so as to excite the longitudinal wave form of the probe sound wave in the radiation layer (13).

7. The ultrasonic monitoring device for scour of marine engineering foundations based on ultrasonic guidance according to claim 1, characterized in that, It also includes a protective shell (1), which is fitted over the outside of the ultrasonic conductor (3) and forms an air gap between the protective shell (1) and the ultrasonic conductor (3).

8. The ultrasonic monitoring device for scour of marine engineering foundations based on ultrasonic guidance according to claim 1, characterized in that, The ultrasonic conductor (3) is filled with a low-impedance filling material (4) to reduce the interference of reflected noise inside the tube.

9. The ultrasonic monitoring device for scour of marine engineering foundations based on ultrasonic guidance according to claim 1, characterized in that, The waterproof electronic sealing chamber (8) is detachably fixed to the top of the ultrasonic conductor (3) via a flange sealing structure (7).

10. A marine engineering foundation scour ultrasonic monitoring device based on ultrasonic guidance according to any one of claims 1 to 9, characterized in that, The device also includes clamps or riveting structures for securing the device to a marine engineering foundation.

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