A kind of anti-sea wave interference underwater acoustic measurement transmission device

Abstract

The application discloses an anti-sea-wave interference underwater acoustic measurement transmission device, which comprises a float, a GPS host, a GPS signal transmitting station, a GPS signal transmitting antenna, a hydrophone, a water leakage detection sensor, a pressure sensor, a power supply, a data collector, a data wireless transmitting system, a data wireless transmitting antenna, a GPS signal receiving antenna arranged on a measuring ship, a measured ship track drawing system, a data wireless receiving antenna, and a data processing system; the float is a watertight structure, and a one-way valve and a watertight connector are arranged on the upper cover of the float; the GPS host, the GPS signal transmitting station, the water leakage detection sensor, the pressure sensor, the power supply, the data collector and the data wireless transmitting system are arranged in the float; the GPS signal transmitting antenna, the hydrophone and the data wireless transmitting antenna are arranged on the upper cover of the float. The application can eliminate underwater acoustic interference caused by cable shaking and sea wave fluctuation, and ensure the accuracy of underwater acoustic measurement.

Description

Technical Field

[0001] This invention belongs to the field of underwater radiated noise testing technology for ships, specifically relating to an anti-wave interference underwater acoustic measurement and transmission device, which is applied to the measurement of underwater radiated noise during the navigation of ships and aircraft. Background Technology

[0002] Currently, my country's underwater radiated noise measurement systems for ships mainly consist of bottom-mounted and shipborne cable-mounted systems, as specified in the China Classification Society's "Guidelines for Underwater Radiated Noise of Ships," "GJB 4057-2000 Methods for Measuring Ship Noise," and "GJB 273B-2020 Methods for Measuring Ship Vibration and Noise." Both systems transmit the underwater acoustic signals collected by hydrophones to the measurement system on the measuring vessel via cables. During the measurement process, cable vibration and wave fluctuations can create vibration interference, affecting the hydrophone measurement results and causing inaccuracies. Therefore, a new measurement method is urgently needed. Summary of the Invention

[0003] The main objective of this invention is to provide an anti-wave interference underwater acoustic measurement transmission device that can eliminate underwater acoustic interference caused by cable vibration and wave fluctuations, thus ensuring the accuracy of underwater acoustic measurements.

[0004] The technical solution adopted in this invention is:

[0005] An anti-wave interference underwater acoustic measurement and transmission device includes an underwater measurement and signal transmission system and a measurement processing system;

[0006] The underwater measurement and signal transmission system includes a buoy, a GPS host, a GPS signal transmitting radio, a GPS signal transmitting antenna, a hydrophone, a leak detection sensor, a pressure sensor, a power supply, a data acquisition unit, a data wireless transmission system, and a data wireless transmission antenna; the measurement processing system includes a GPS signal receiving antenna placed on the measurement vessel, a vessel trajectory mapping system, a data wireless receiving antenna, and a data processing system.

[0007] The pontoon is a watertight structure, and the upper cover of the pontoon is equipped with a one-way valve and a watertight connector.

[0008] The GPS host and GPS signal transmitter are placed inside the buoy; the GPS signal transmitting antenna is placed on the buoy cover, and its antenna signal cable enters the buoy through a watertight connector; the GPS host collects the position information of the measuring vessel and sends the position information to the GPS signal transmitter, and the GPS signal transmitter sends the position information to the track drawing system of the measured vessel on the measuring vessel through the GPS signal transmitting antenna and the GPS signal receiving antenna.

[0009] The leak detection sensor, pressure sensor, power supply, data acquisition unit, and wireless data transmission system are placed inside the float; the hydrophone and wireless data transmission antenna are placed on the top cover of the float, and their cables enter the float through a watertight connector.

[0010] The hydrophone collects underwater acoustic signals, the leak detection sensor collects information about water ingress into the float, and the pressure sensor collects information about air leakage into the float. These are then transmitted to the data acquisition unit, which sends the data to the wireless data transmission system. The wireless data transmission system then transmits the data to the data processing system via the wireless data transmission antenna and the wireless data receiving antenna.

[0011] The power supply provides power to the GPS host, pressure sensor, leak detection sensor, and data acquisition unit.

[0012] Preferably, the float is made of aluminum alloy, which has the characteristics of high strength, small size and light weight, so that the weight of the float is less than 10kg and the total weight of the entire underwater measurement and signal transmission system is no more than 30kg.

[0013] Preferably, the top cover of the buoy is 120mm-200mm above the water surface when fully loaded with counterweight; under sea state 3, the swaying and tilting angle of the buoy is no more than 30°.

[0014] Preferably, under sea state 3, the buoy and cable joint meet the IP8 rating, the continuous diving pressure of the buoy is not less than 20m water pressure, and the continuous diving time is not less than 2 hours.

[0015] Preferably, the top cover of the float adopts an axial and radial double sealing structure to improve water resistance and sealing performance. The axial sealing uses a neoprene rubber gasket, and the radial sealing uses a sealing ring, which can withstand water pressure greater than 5MPa.

[0016] Preferably, the float is pressurized to 0.05 MPa by air filling the tube through a one-way valve.

[0017] Preferably, the GPS signal transmitting antenna and the data wireless transmitting antenna are fixed to the top cover of the buoy by fasteners, with a height greater than 1 meter. They have good communication performance under line-of-sight conditions, a data transmission rate of not less than 1 MB / s, a communication distance of more than 5 km in the sea environment, and a 360° omnidirectional wireless transmission direction. They also have data storage and power-off resume transmission functions.

[0018] Preferably, the total height of the entire underwater measurement and signal transmission system is 2300mm-2800mm, of which the GPS signal transmitting antenna and the data wireless transmitting antenna are about 1900mm high; the outer diameter of the float is Φ330mm.

[0019] Preferably, all cables entering and exiting the pontoon are connected using coaxial watertight connectors. The connection between the cable and the watertight connector is treated with a vulcanization process for waterproofing, which provides strong sealing and prevents the cable from interfering with the main body of the pontoon, thereby improving the stability of the pontoon.

[0020] Preferably, the power supply is connected to the controller, and the power switch is remotely controlled by the controller. The GPS host, GPS signal transmitter, water leakage detection sensor, pressure sensor, data acquisition unit, and data wireless transmission system are installed on the controller.

[0021] Preferably, the top cover of the pontoon is equipped with a pressure gauge for monitoring pressure and leakage. A pressure sensor is used for real-time monitoring of the pressure inside the pontoon; if a pressure drop is detected, the test is immediately paused, and the pontoon is lifted out of the water for an airtightness check and reassembly. A leakage detection sensor is used for real-time monitoring of water ingress into the pontoon. The battery charging cable exits the pontoon via a watertight cable, avoiding watertightness issues caused by disassembling the pontoon at sea to replace the battery.

[0022] The beneficial effects of this invention are as follows:

[0023] The collected underwater acoustic, temperature, pressure, and positioning data are wirelessly transmitted to the survey vessel, eliminating underwater acoustic interference caused by cable vibration and wave fluctuations, thus ensuring the accuracy of underwater acoustic measurements.

[0024] It has low underwater acoustic interference and a low measurement lower limit frequency, and can be used for radiated noise measurement at frequencies above 5Hz.

[0025] The system adopts a fully floating aluminum alloy pontoon, which integrates the underwater acoustic measurement and wireless data transmission system inside the pontoon, eliminating cable vibration and minimizing underwater acoustic interference.

[0026] The cylinder is designed with high-strength, lightweight aluminum alloy, which makes the system small in size and light in total weight, allowing it to be deployed at sea by a single person.

[0027] The internal pressure watertight design allows for real-time monitoring of the internal pressure of the device, enabling early detection of watertightness issues. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a structural block diagram of an underwater acoustic measurement and transmission device that resists ocean wave interference;

[0030] Figure 2 This is a schematic diagram of the main structure of an underwater measurement and signal transmission system;

[0031] Figure 3 This is a side view of the underwater measurement and signal transmission system.

[0032] Figure 4 This is a top view schematic diagram of the underwater measurement and signal transmission system;

[0033] Figure 5 This is a top view of the internal structure of the pontoon;

[0034] In the diagram: 1. Float, 2. Data acquisition unit, 3. GPS host, 4. Power supply, 5. Pressure sensor, 6. Check valve, 7. Watertight connector, 8. Wireless data transmission system, 9. Leakage detection sensor, 10. GPS signal transmitting antenna, 11. Wireless data transmitting antenna, 12. Hydrophone, 13. GPS signal transmitting radio, 14. Fixture. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0036] See Figures 1-5 An anti-wave interference underwater acoustic measurement and transmission device includes an underwater measurement and signal transmission system and a measurement processing system.

[0037] The underwater measurement and signal transmission system includes a float 1, a GPS host 3, a GPS signal transmitting radio 13, a GPS signal transmitting antenna 10, a hydrophone 12, a leak detection sensor 9, a pressure sensor 5, a power supply 4, a data acquisition unit 2, a data wireless transmission system 8, and a data wireless transmission antenna 11; the measurement processing system includes a GPS signal receiving antenna placed on the measurement vessel, a trajectory mapping system for the measured vessel, a data wireless receiving antenna, and a data processing system.

[0038] The float 1 has a watertight structure, and its upper cover is equipped with a one-way valve 6 and a watertight connector 7. The upper cover of the float 1 adopts an axial and radial double-seal structure to improve water resistance and sealing performance. The axial seal uses a neoprene rubber gasket, and the radial seal uses a sealing ring, which can withstand water pressure greater than 5MPa. The float 1 is pressurized to 0.05MPa by air filling through the one-way valve 6. A pressure gauge can be installed on the upper cover of the float 1 to monitor pressure and leakage. The GPS host 3, GPS signal transmitter 13, water leakage detection sensor 9, pressure sensor 5, power supply 4, data acquisition unit 2, and data wireless transmission system 8 are placed inside the float 1. The power supply 4 is connected to the controller and is located inside the controller, allowing remote control of the power supply 4 switch via the controller. The GPS host 3, GPS signal transmitter 13, water leakage detection sensor 9, pressure sensor 5, data acquisition unit 2, and data wireless transmission system 8 are integrated into the controller to reduce the size of the equipment. The GPS signal transmitting antenna 10 and the data wireless transmitting antenna 11 are fixed to the upper cover of the float 1 by the fastener 14, and their antenna signal cables enter the float 1 through the watertight connector 7; the hydrophone 12 is also placed on the upper cover of the float 1, and its cable enters the float through the watertight connector 7.

[0039] GPS host 3 collects the position information of the survey vessel and sends it to GPS signal transmitter 13. GPS signal transmitter 13 transmits the position information to the ship trajectory mapping system on the survey vessel via GPS signal transmitting antenna 10 and GPS signal receiving antenna. Hydrophone 12 transmits the collected underwater acoustic signals, leakage detection sensor 9 transmits the collected water ingress information in buoy 1, and pressure sensor 5 transmits the collected air leakage information in buoy 1 to data acquisition unit 2. Data acquisition unit 2 sends the data to wireless data transmission system 8, which transmits the data to data processing system via wireless data transmitting antenna 11 and wireless data receiving antenna. Power supply 4 is a 24V lithium battery that powers GPS host 3, pressure sensor 5, leakage detection sensor 9, and data acquisition unit 2.

[0040] In this embodiment, the float 1 is made of aluminum alloy, which features high strength, small size, and light weight, making its weight less than 10kg. A counterweight is provided at the bottom of the float 1. The total weight of the entire underwater measurement and signal transmission system does not exceed 30kg. With full load and counterweight, the top cover of the float 1 is 120mm-200mm above the water surface; in sea state 3, the rolling and tilting angle of the float 1 does not exceed 30°. The float 1 and cable connector meet IP8 rating, the continuous diving pressure of the float 1 is not less than 20m water pressure, and the continuous diving time is not less than 2 hours. The total height of the entire underwater measurement and signal transmission system is 2300mm-2800mm, with the outer diameter of the float 1 being Φ330mm.

[0041] In this embodiment, the GPS signal transmitting antenna 10 and the data wireless transmitting antenna 11 are approximately 1900mm high; they provide good communication performance under line-of-sight conditions, with a data transmission rate of not less than 1MB / s, a communication distance of more than 5km in a sea environment, and a 360° omnidirectional wireless transmission direction. They also have data storage and power-off resume transmission functions.

[0042] In this embodiment, all cables entering and exiting the pontoon 1 are connected by coaxial watertight connectors 7. The connection between the cable and the watertight connector is treated with a vulcanization process to make it waterproof and sulfidated, which provides strong sealing and makes it less likely for the cable to interfere with the main body of the pontoon, thereby improving the stability of the pontoon.

[0043] Pressure sensor 5 is used for real-time monitoring of the pressure inside the buoy. If a pressure drop is detected, the test is immediately paused, and the buoy is lifted out of the water for an airtightness check and reassembly. Leakage detection sensor 9 is used for real-time monitoring of water ingress into the buoy. The battery charging cable exits the buoy via a watertight cable, avoiding watertightness issues caused by disassembling the buoy at sea to replace the battery.

[0044] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0045] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A wave-resistant underwater acoustic measurement and transmission device, characterized in that: Includes underwater measurement and signal transmission systems, and measurement processing systems; The underwater measurement and signal transmission system includes a buoy, a GPS host, a GPS signal transmitting radio, a GPS signal transmitting antenna, a hydrophone, a leak detection sensor, a pressure sensor, a power supply, a data acquisition unit, a data wireless transmission system, and a data wireless transmission antenna; the measurement processing system includes a GPS signal receiving antenna placed on the measurement vessel, a vessel trajectory mapping system, a data wireless receiving antenna, and a data processing system. The pontoon is a watertight structure, and the upper cover of the pontoon is equipped with a one-way valve and a watertight connector. The GPS host and GPS signal transmitting radio are placed inside the buoy; the GPS signal transmitting antenna is placed on the top cover of the buoy, and its antenna signal cable enters the buoy through a watertight connector. The GPS host collects the position information of the survey vessel and sends the position information to the GPS signal transmitting radio. The GPS signal transmitting radio then sends the position information to the ship trajectory drawing system on the survey vessel via the GPS signal transmitting antenna and the GPS signal receiving antenna. The leak detection sensor, pressure sensor, power supply, data acquisition unit, and wireless data transmission system are placed inside the float; the hydrophone and wireless data transmission antenna are placed on the top cover of the float, and their cables enter the float through a watertight connector. The hydrophone collects underwater acoustic signals, the leak detection sensor collects information about water ingress into the float, and the pressure sensor collects information about air leakage into the float. These are then transmitted to the data acquisition unit, which sends the data to the wireless data transmission system. The wireless data transmission system then transmits the data to the data processing system via the wireless data transmission antenna and the wireless data receiving antenna. The power supply provides power to the GPS host, pressure sensor, leak detection sensor, and data acquisition unit.

2. The anti-wave interference underwater acoustic measurement and transmission device according to claim 1, characterized in that: The pontoon is made of aluminum alloy and weighs less than 10 kg.

3. The anti-wave interference underwater acoustic measurement and transmission device according to claim 1 or 2, characterized in that: With full load and counterweight, the top cover of the pontoon should be 120mm-200mm above the water surface; in sea state 3, the swaying and tilting angle of the pontoon should not exceed 30°.

4. The anti-wave interference underwater acoustic measurement and transmission device according to claim 3, characterized in that: The continuous diving pressure of the buoy shall not be less than 20m water pressure, and the continuous diving time shall not be less than 2 hours.

5. The anti-wave interference underwater acoustic measurement and transmission device according to claim 3, characterized in that: The upper cover of the pontoon adopts a double sealing structure with axial and radial sealing. The axial sealing uses a neoprene rubber gasket, and the radial sealing uses a sealing ring, which can withstand water pressure greater than 5MPa.

6. The anti-wave interference underwater acoustic measurement and transmission device according to claim 3, characterized in that: The pontoon is pressurized to 0.05 MPa by filling it with air through a one-way valve.

7. The anti-wave interference underwater acoustic measurement and transmission device according to claim 1, characterized in that: The GPS signal transmitting antenna and the data wireless transmitting antenna are fixed to the top cover of the buoy by fasteners. The height is greater than 1 meter, the data transmission rate is not less than 1MB / s, the communication distance in the sea environment is greater than 5km, the wireless transmission direction is 360° omnidirectional, and it has data storage and power failure resume transmission functions.

8. The anti-wave interference underwater acoustic measurement and transmission device according to claim 1, characterized in that: All cables entering and exiting the pontoons are connected using coaxial watertight connectors, and the connection between the cables and the watertight connectors is treated with a vulcanization process for waterproofing.

9. The anti-wave interference underwater acoustic measurement and transmission device according to claim 1, characterized in that: The total weight of the underwater measurement and signal transmission system shall not exceed 30 kg.

10. The anti-wave interference underwater acoustic measurement and transmission device according to claim 1, characterized in that: The power supply is connected to the controller, which remotely controls the power switch; the GPS host, GPS signal transmitter, water leakage detection sensor, pressure sensor, data acquisition unit, and data wireless transmission system are installed on the controller.

Images