Underwater detector with ultrasonic self-cleaning structure

Abstract

The utility model discloses an underwater detector with an ultrasonic self-cleaning structure, and relates to the technical field of underwater detection equipment. The device mainly comprises a detector main body part, a transducer array, an ultrasonic cleaning module, a light transmittance sensor and a control module, a coupling cavity is formed between a detector shell and a protective layer, and the cavity is filled with an acoustic impedance matching medium to optimize the sound wave conduction efficiency; the transducer array is annularly embedded in the coupling cavity and is driven by the ultrasonic generation module to generate high-frequency sound waves of 25-32 kHz, high-pressure shock waves are generated on the surface of the protective layer through the cavitation effect, and non-contact biological attachments are formed; the light transmittance sensor monitors the light transmittance change in real time; the control module is integrated with a timing control circuit and drives the transducer to work periodically. The scheme is suitable for long-term underwater operation scenes such as aquaculture and the like, has the advantages of efficient cleaning, intelligent control, long service life, low maintenance cost and high reliability, and provides an innovative solution for anti-biological attachment of underwater detection equipment.

Description

Technical Field

[0001] This utility model relates to the field of underwater detection equipment technology, specifically a fish biomass monitoring device that uses ultrasonic self-cleaning technology to achieve anti-bioattachment. Background Technology

[0002] Existing underwater detection equipment faces the problem of biofouling during long-term use, leading to decreased sensor sensitivity and data distortion. Current cleaning methods have the following drawbacks: traditional underwater detectors are easily adhered to by algae, shellfish, and other organisms, resulting in decreased sensor sensitivity; mechanical scraping cleaning mechanisms suffer from high power consumption and damage to the coating. To address these issues, an underwater detector with an ultrasonic self-cleaning structure is designed, which helps improve underwater detection efficiency and reduce manual cleaning costs. Utility Model Content

[0003] The purpose of this invention is to provide an underwater detector with an ultrasonic self-cleaning structure to solve the problems mentioned in the background art, such as the ease with which current underwater detectors are subject to biological adhesion, complex cleaning methods, easy damage, and high energy consumption, and to extend the service life of the equipment.

[0004] To achieve the above objectives, this novel experimental design provides the following technical solution: an underwater detector with an ultrasonic self-cleaning structure, comprising a detector body, a cylindrical shell outside the detector body, an ultrasonic generating module installed in the middle compartment inside the shell, the ultrasonic generating module being connected to an integrated control circuit via a waterproof wire, a polyurethane bio-resistant protective layer on the outer surface of the shell, a coupling cavity formed between the protective layer and the detector shell, a silicon-based acoustic impedance matching medium filled in the coupling cavity, a transducer array arranged in a ring within the coupling cavity, and a light transmittance sensor embedded in the outer surface of the protective layer.

[0005] Furthermore, the polyurethane protective layer has a thickness of 0.5 mm, a surface roughness Ra ≤ 1.6 μm, and is coated with a nano-hydrophobic coating, which significantly reduces the bio-adhesion rate and the risk of water seepage.

[0006] Furthermore, the coupling cavity is filled with a silicon-based acoustic impedance matching medium, through which sound waves are conducted, and the acoustic impedance matching reduces energy reflection.

[0007] Furthermore, the transducer array is arranged in a ring within the coupling cavity, and the eight transducers are embedded in the detector housing sidewall at 45° intervals, and are sealed and fixed to the housing with epoxy resin to ensure that the sound waves cover the entire surface of the housing.

[0008] Furthermore, the transmittance sensor is embedded in the outer surface of the protective layer in a ring shape, and the four sets of transmittance sensors are distributed in a ring at 90° intervals. Infrared spectroscopy detection technology is used to collect transmittance data and wirelessly transmit the data to the control unit.

[0009] Furthermore, the integrated timing control circuit is connected to the ultrasonic generator module via a waterproof wire and receives feedback signals from the transmittance sensor. The control circuit controls the switching and frequency of the ultrasonic generator module, thereby driving the transducer to work periodically.

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

[0011] This invention utilizes ultrasonic waves for self-cleaning. Through the synergistic design of the acoustic impedance matching medium and the ring transducer array, the efficiency of ultrasonic energy transfer is significantly improved. Combined with the high-frequency cavitation effect (25-32kHz), non-contact cleaning is achieved. The energy consumption per cycle is reduced by 60% compared to traditional mechanical methods, while avoiding physical damage to the protective layer. The lower power consumption reduces the time cost of powering the cleaning process, greatly improving the accuracy and utilization of the underwater detector. In addition, the light transmittance sensor monitors the surface dirt thickness in real time, ensuring cleaning accuracy and response speed. The nano-hydrophobic coating of the polyurethane protective layer and the epoxy resin sealing process significantly reduce the biofouling rate and the risk of water seepage. Combined with the double-layer shielded waterproof wire, this invention comprehensively achieves efficient, low-consumption, and long-life underwater monitoring closed-loop management. Attached Figure Description

[0012] Figure 1 This is a top view of the overall structure of this utility model;

[0013] Figure 2 This is a structural diagram of the overall appearance of the present utility model;

[0014] Figure 3 This is a diagram showing the internal structure of the present invention after removing the detector housing 7 and the protective layer 8;

[0015] In the figure: 1 Detector body, 2 Transducer array, 3 Transmittance sensor, 4 Ultrasonic generating module, 5 Waterproof wire, 6 Control circuit, 7 Housing, 8 Protective layer, 9 Coupling cavity, 10 Silicon-based acoustic impedance matching medium. Detailed Implementation

[0016] The following illustrative figures further illustrate the content of this utility model, but do not limit the application of this utility model.

[0017] See Figure 1An underwater detector with an ultrasonic self-cleaning structure includes a detector body 1 made of TC4 titanium alloy with an outer diameter of Φ200mm. A cylindrical shell 7 surrounds the detector body 1. The outer surface of the shell 7 is coated with a polyurethane anti-biological protective layer 8, 0.5mm thick, with a surface roughness Ra≤1.6μm, which can reduce biological adhesion to a certain extent. A coupling cavity 9 is formed between the protective layer 8 and the detector shell 7, with a radial width of 8mm. The coupling cavity 9 is filled with a silicon-based acoustic impedance matching medium 10 with an acoustic impedance value of 2.3MRayl. Acoustic impedance matching reduces energy reflection. A transducer array 2 is arranged in a ring within the coupling cavity 9, focusing sound waves onto the outer surface of the protective layer to form a clean area with a diameter of Φ200mm. The transducers are embedded in the sidewall of the detector shell 7 at 45° intervals and sealed with epoxy resin to ensure that the sound waves cover the shell surface without dead angles. Four sets of transmittance sensors 3 are embedded in the outer surface of the protective layer 8 at 90° intervals to detect transmittance in real time.

[0018] See Figure 2 The overall appearance of the underwater detector with ultrasonic self-cleaning structure is shown in Figure 8. The outermost layer is the protective layer 8, which is coated with a nano-hydrophobic coating to significantly reduce the bio-attachment rate and the risk of water seepage. Four sets of light transmittance sensors 3 are embedded in the outer surface of the protective layer 8 in a ring at 90° intervals.

[0019] See Figure 3 The ultrasonic generator module 4 is installed in the middle compartment inside the outer casing 7. The transducer array 2 is driven by the ultrasonic generator module 4, which outputs a 25-32kHz high-frequency electrical signal. The transducer 2 converts electrical energy into mechanical vibration through the piezoelectric effect, generating ultrasonic waves. Four sets of transmittance sensors 3 detect the transmittance in real time and wirelessly transmit the data to the control unit to determine whether the device needs self-cleaning. The control unit includes an integrated timing control circuit 6, which is connected to the ultrasonic generator module 4 via a waterproof wire 5. The waterproof wire 5 uses a double-shielded coaxial cable to drive the transducer to work periodically. This device generates cavitation bubbles in the liquid using ultrasonic waves. When these bubbles collapse, they release high-pressure shock waves to peel off the attached substances. This non-contact cleaning avoids surface wear, extends the equipment maintenance cycle, and consumes less energy than mechanical cleaning. It features low energy consumption, stable structure, and low maintenance cost.

[0020] When in use, after the underwater detector is started, the control module first performs a self-check to confirm that the ultrasonic generator output is stable, the transducer impedance is normal, and the transmittance sensor reference value is correct. The system automatically selects the working mode according to preset conditions. In the trigger mode, the transmittance sensor monitors the thickness of dirt on the protective layer surface in real time. When the transmittance drops by more than 15%, the cleaning program is immediately activated. The ultrasonic generator outputs a 25-32kHz high-frequency electrical signal, which drives the ring-distributed transducer array to convert electrical energy into mechanical vibration. After the acoustic impedance is matched by the silicon-based medium in the coupling cavity, the sound waves are focused and penetrate the outer surface of the protective layer, inducing a violent cavitation effect at the interface between the protective layer and the water. The resulting high-pressure shock wave peels off the attached algae, shellfish, and other biofilms. During the cleaning process, the transmittance sensor continuously provides data. If the transmittance recovers to above 90%, it automatically goes into sleep mode; otherwise, it switches to 32kHz for enhanced cleaning, ensuring long-term stable operation in complex waters. The energy consumption of a single cleaning cycle is only 40% of that of traditional mechanical methods, achieving efficient, low-damage, and intelligent full-cycle self-maintenance.

[0021] In summary, this underwater detector with an ultrasonic self-cleaning structure solves the problems of high power consumption and coating damage caused by traditional mechanical scraping cleaning mechanisms when underwater detectors are covered by organisms by the cooperation of 1 detector body, 2 transducer array, 3 transmittance sensor, 4 ultrasonic generation module, 6 control circuit, 7 shell, 8 protective layer and 9 coupling cavity.

[0022] 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. An underwater probe having ultrasonic self-cleaning structure, characterized by: The application relates to an ultrasonic cleaning probe, which comprises a main body part, an ultrasonic cleaning part and a control part, wherein the main body part comprises a probe body (1), an outer cylindrical shell (7) of the probe body, an outer surface of the shell (7) is provided with a polyurethane biological protection layer (8), a coupling cavity (9) is formed between the protection layer (8) and the probe shell (7), the coupling cavity (9) is filled with a silicon-based acoustic impedance matching medium (10), the ultrasonic cleaning part comprises eight groups of transducer arrays (2), the transducer arrays (2) are annularly distributed in the coupling cavity (9), are annularly embedded in the side wall of the probe shell (7) at intervals of 45 DEG, ensure that sound waves cover the whole shell surface, and the transducer arrays (2) are driven by an ultrasonic wave generating module (4); the ultrasonic wave generating module (4) is installed in a middle cabin of the shell (7); four groups of light transmittance sensors (3) are annularly embedded in the outer surface of the protection layer (8) at intervals of 90 DEG, and the light transmittance sensors detect light transmittance in real time; the control part comprises an integrated timing control circuit (6), the control circuit (6) is connected with the ultrasonic cleaning part through waterproof wires (5), drives the transducer to periodically work, and receives feedback signals of the light transmittance sensors (3).

2. The underwater probe of claim 1, wherein: The working frequency range of the transducer array (2) is 25-32 kHz, and the power of a single group is 10-20 W.

3. The underwater probe of claim 1, wherein: The coupling cavity (9) is filled with the silicon-based acoustic impedance matching medium (10), the acoustic impedance value of which is between the material of the probe shell and water, and is 2.3 MRayl.

4. The underwater probe of claim 1, wherein: The light transmittance sensor (3) adopts infrared spectrum detection technology, and data is sent to the control circuit (6) through a wireless transmission module.

5. The underwater probe of claim 1, wherein: The polyurethane biological protection layer (8) has a thickness of 0.5 mm, a surface roughness Ra of less than or equal to 1.6 mu m, and is coated with a nano-hydrophobic coating.

6. The underwater probe of claim 1, wherein: The waterproof wire (5) adopts a double-layer shielding coaxial cable, an outer layer of which is coated with a polytetrafluoroethylene insulation layer, and the water pressure resistance is greater than or equal to 5 MPa.

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