Ocean surface bubble optical fiber detection device

Abstract

The utility model relates to an optical fiber detection device for ocean surface bubbles, which is characterized in that a near-water-surface bubble measurement optical fiber probe array (4) and a droplet bubble measurement optical fiber probe array (5) are designed by a main floating body (1) to respectively realize multi-point detection of water-surface bubbles and multi-point detection of droplets and bubbles higher than the water surface, and the structure of the main floating body (1) is specifically designed. The optical fiber probe array element processing circuit (2), the optical fiber probe acquisition circuit (3) and the satellite communication unit processing circuit (6) which are reasonably arranged and cooperatively applied can acquire micron-scale sea surface bubbles of which the winding depth is 40-50cm, so that simultaneous detection of surface bubble data of multiple measurement points is efficiently realized, and the detection efficiency of the sea surface bubbles is effectively improved.

Description

Technical Field

[0001] The utility model relates to an ocean surface bubble optical fiber detection device, belonging to the technical field of ocean detection equipment. Background Art

[0002] An optical fiber probe is a sensor capable of measuring ocean surface bubbles. Its principle is to deploy a certain number of optical fiber probe array elements, sense the backscattered light power when the bubble liquid phase and gas phase are at each measurement point through each optical fiber probe array element, and through the corresponding processing and acquisition circuit, calculate the bubble diameter, bubble number, and bubble movement speed at the measurement point. Multiple optical fiber probe array elements will output the bubble diameter, bubble number, and bubble movement speed at different measurement points.

[0003] The Lamarre and Melville teams used conductivity probes to complete the measurement of the gas content of transient bubble plumes involved in breaking waves and observed transient bubble plumes with a gas content as high as 24%; the Serdula and Loewen teams used single-needle optical fiber probes to observe large-diameter bubbles (with a diameter greater than 5 mm) generated in a wind-wave flume; the team at the University of Southampton, UK, improved the probe structure and used double-needle optical fiber probes to observe large bubble plumes (with a particle size range of 20 mm - 64 mm) instantaneously involved in plunging breakers and collapsing breakers in a wind-wave flume; in 2011, the team at the University of Southampton, UK, officially promoted the application of double-needle optical fiber probes in the SOLAS observation program, and used double-needle optical fiber probes and hydrophone arrays to synchronously observe bubble plumes in the Atlantic Ocean. The particle size range that the hydrophone can observe for bubble plumes is 17 μm - 3500 μm, while the range that the double-needle optical fiber probe can observe is 6 μm - 1101 μm, and the time variation of the bubbles is between 2 ms - 10 min. However, the conductivity probes and double-needle optical fiber probes involved in the above observation methods can only perform single-point measurements.

[0004] The domestic applications of the probe method for measuring bubbles mainly focus on the gas-liquid two-phase flow test field in the chemical industry: for example, Wang Tiefeng et al. developed a single-needle optical fiber probe multiphase flow bubble measurement system, which can be used to measure bubble parameters in gas-liquid two-phase and gas-liquid-solid three-phase systems; Han Mei et al. developed a double-probe conductivity probe. Domestic bubble observations also involve image method technologies, such as the First Institute of Oceanography, State Oceanic Administration and Ocean University of China carried out a high-resolution underwater bubble measurement imaging system, which can collect bubbles with a size of 500 - 800 μm.

[0005] Therefore, the existing technology for measuring ocean surface bubbles with optical fiber probes is still limited to single-point measurements, and the measurement results are limited and lack regional representativeness, resulting in low practical application efficiency of the measurement results. Content of the Utility Model

[0006] The technical problem to be solved by the present utility model is to provide an ocean surface bubble optical fiber detection device, to design a floating body structure, carry a multi-point measurement structure, realize multi-position and multi-point measurement, and improve the actual working efficiency.

[0007] The present utility model adopts the following technical solutions to solve the above technical problems: The present utility model designs an ocean surface bubble optical fiber detection device, including a main floating body, an optical fiber probe array element processing circuit, an optical fiber probe acquisition circuit, and a near-water surface bubble measurement optical fiber probe array and a spray bubble measurement optical fiber probe array arranged on the outer surface of the main floating body; wherein, a sealed cavity is arranged inside the main floating body, and the optical fiber probe array element processing circuit and the optical fiber probe acquisition circuit are located in the sealed cavity of the main floating body; the near-water surface bubble measurement optical fiber probe array and the spray bubble measurement optical fiber probe array are respectively connected to the optical fiber probe acquisition circuit through the optical fiber probe array element processing circuit; the position height of the near-water surface bubble measurement optical fiber probe array is lower than the position height of the spray bubble measurement optical fiber probe array. Based on the near-water surface bubble measurement optical fiber probe array and the spray bubble measurement optical fiber probe array being carried on the main floating body and floating on the water surface, the near-water surface bubble measurement optical fiber probe array detects the water surface bubbles, and the spray bubble measurement optical fiber probe array detects the spray bubbles with a position higher than the water surface.

[0008] As a preferred technical solution of the present utility model: It also includes a satellite communication unit processing circuit located in the sealed cavity of the main floating body. The satellite communication unit processing circuit is connected to the optical fiber probe acquisition circuit, and an external control signal is sent to the optical fiber probe acquisition circuit by the satellite communication unit processing circuit, or the signal received by the optical fiber probe acquisition circuit is externally transmitted by the satellite communication unit processing circuit.

[0009] As a preferred technical solution of the present utility model: The main floating body includes a bottom floating body, an upper floating body, and a top cover. Among them, a cavity is arranged inside the bottom floating body, the upper surface of the bottom floating body is open, and the optical fiber probe array element processing circuit is placed in the cavity of the bottom floating body; the upper floating body includes a bottom plate and a geometric body. The outer diameter of the cross-section of the geometric body is smaller than the outer diameter of the cross-section of the bottom floating body. A cavity is arranged inside the geometric body. The lower surface of the geometric body is open and communicates with its cavity. A through hole penetrating both sides is arranged at the center position of the bottom plate, and the diameter of the through hole is equal to the diameter of the open mouth on the lower surface of the geometric body. The edge of the open mouth on the lower surface of the geometric body is butted against the edge of the through hole on the upper surface of the bottom plate for one week. A through hole communicating with its cavity is arranged at the center position of the upper surface of the geometric body. The inner diameter of this through hole is adapted to the outer diameter of the top cover. The top cover is detachably sealed in the through hole on the upper surface of the geometric body for covering the through hole on the upper surface of the geometric body. The optical fiber probe acquisition circuit and the satellite communication unit processing circuit are placed in the cavity of the geometric body; the shape and size of the bottom plate for one week are the same as the shape and size of the open mouth on the upper surface of the bottom floating body for one week, and the bottom plate is detachably sealed on the open mouth on the upper surface of the bottom floating body.

[0010] As a preferred technical solution of the present utility model: It further includes a sealing ring. The geometric bodies in the bottom floating body and the upper floating body are both cylinders. An annular member with an external thread is provided on the lower surface of the bottom plate in the upper floating body, and the central axis of the annular member is collinear with the central axis of the bottom plate. The outer diameter of the annular member is adapted to the inner diameter of the open upper surface of the bottom floating body. An internal thread is provided on the inner circumference of the open upper surface of the bottom floating body, and the sealing ring is arranged on the inner circumference of the open upper surface of the bottom floating body. Through the engagement between the external thread of the annular member on the lower surface of the bottom plate in the upper floating body and the internal thread of the open upper surface of the bottom floating body, the bottom plate in the upper floating body is rotationally sealed and placed on the open upper surface of the bottom floating body.

[0011] As a preferred technical solution of the present utility model: The optical fiber probe acquisition circuit is in a circular ring structure. The optical fiber probe element processing circuit is connected to a cable and passes through the middle hole of the circular ring structure of the optical fiber probe acquisition circuit and is docked to the optical fiber probe acquisition circuit to realize the connection between the optical fiber probe element processing circuit and the optical fiber probe acquisition circuit.

[0012] As a preferred technical solution of the present utility model: It further includes a satellite communication preset interface, at least two fixing devices, and a push-button bracelet arranged on the upper surface of the top cover. Each fixing device is respectively arranged on the inner surface of the bottom floating body and the inner surface of the geometric body in the upper floating body, and the optical fiber probe element processing circuit and the optical fiber probe acquisition circuit are respectively position-limited and fixed by each fixing device; the satellite communication preset interface is arranged on the upper surface of the top cover and is detachably sealed and placed in the through hole on the upper surface of the geometric body based on the top cover, and the satellite communication preset interface is detachably connected to the satellite communication unit processing circuit.

[0013] As a preferred technical solution of the present utility model: The near-water surface bubble measurement optical fiber probe array and the droplet bubble measurement optical fiber probe array each include respective optical fiber probe elements. Among them, each optical fiber probe element in the near-water surface bubble measurement optical fiber probe array is arranged on the outer side surface of the bottom floating body in a circle, and the adjacent optical fiber probe elements are equidistant; each optical fiber probe element in the droplet bubble measurement optical fiber probe array is arranged on the upper surface of the bottom plate in the upper floating body and surrounds the geometric body in a circle, and the adjacent optical fiber probe elements are equidistant; each optical fiber probe element in the near-water surface bubble measurement optical fiber probe array and each optical fiber probe element in the droplet bubble measurement optical fiber probe array are respectively connected to the optical fiber probe acquisition circuit through the optical fiber probe element processing circuit.

[0014] As a preferred technical solution of the present utility model: it further includes various watertight connectors, the number of the watertight connectors is equal to the number of fiber optic probe elements in the near-surface bubble measurement fiber optic probe array, and each fiber optic probe element in the near-surface bubble measurement fiber optic probe array corresponds to each watertight connector one by one; each watertight connector is arranged on the outer side surface of the bottom float in a circle, and the adjacent watertight connectors are equidistant from each other. Each watertight connector passes through the outer side surface of the bottom float and connects the fiber optic probe element processing circuit in its cavity. Each fiber optic probe element in the near-surface bubble measurement fiber optic probe array is detachably connected to the corresponding watertight connector.

[0015] As a preferred technical solution of the present utility model: the fiber optic probe element includes a fiber optic sensitive element, a transmission optical fiber, a primary buffer protection structure, a secondary buffer protection structure, and a tertiary protection buffer structure. Among them, a primary buffer protection structure is wrapped on a local section of the transmission optical fiber from a position at a preset distance from its front end to its end. A secondary buffer protection structure is wrapped on a local section of the primary buffer protection structure from a position at a preset distance from its front end facing the front end of the transmission optical fiber to its end. A tertiary protection buffer structure is wrapped on a local section of the secondary buffer protection structure from a position at a preset distance from its front end facing the front end of the transmission optical fiber to its end. The end of the transmission optical fiber is used to connect the fiber optic probe element processing circuit, and the fiber optic sensitive element is connected to the front end of the transmission optical fiber through a glass ferrule.

[0016] As a preferred technical solution of the present utility model: the fiber optic probe element processing circuit includes a light source driving circuit, a photoelectric conversion circuit, and a bias amplification circuit. The transmission optical fiber includes an emission optical fiber and a reflection optical fiber arranged in parallel. The front ends of the emission optical fiber and the reflection optical fiber constitute the front end of the transmission optical fiber; the output end of the light source driving circuit is connected to the end of the emission optical fiber, and the light source driving circuit provides a light source for the emission optical fiber. The end of the reflection optical fiber is connected to the input end of the photoelectric conversion circuit, and the photoelectric conversion circuit converts the optical signal received by the reflection optical fiber into an electrical signal. The output end of the photoelectric conversion circuit is connected to the input end of the bias amplification circuit, and the bias amplification circuit amplifies the converted electrical signal output by the photoelectric conversion circuit; the output end of the bias amplification circuit is connected to the fiber optic probe acquisition circuit.

[0017] Compared with the prior art by adopting the above technical solutions, the marine surface bubble fiber detection device of the present utility model has the following technical effects:

[0018] The utility model designs an ocean surface bubble optical fiber detection device, which designs a near-surface bubble measurement optical fiber probe array and a spray bubble measurement optical fiber probe array with a main floating body, respectively realizing multi-point detection of surface bubbles on the water surface and multi-point detection of spray bubbles at positions above the water surface. The structure of the main floating body is specifically designed, and the optical fiber probe element processing circuit, the optical fiber probe acquisition circuit, and the satellite communication unit processing circuit applied are reasonably arranged. It can collect micron-scale sea surface bubbles with an entrainment depth of 40 cm - 50 cm, efficiently realize the simultaneous detection of surface bubble data at multiple measurement points, and effectively improve the detection efficiency of ocean surface bubbles. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the front view of the ocean surface bubble optical fiber detection device designed by the utility model;

[0020] Figure 2 is the three-dimensional view of the ocean surface bubble optical fiber detection device designed by the utility model;

[0021] Figure 3 is the schematic diagram of the bottom floating body in the ocean surface bubble optical fiber detection device designed by the utility model;

[0022] Figure 4 is the schematic diagram of the upper floating body in the ocean surface bubble optical fiber detection device designed by the utility model;

[0023] Figure 5 is the schematic diagram of the optical fiber probe element in the ocean surface bubble optical fiber detection device designed by the utility model;

[0024] Figure 6 is the application schematic diagram of the ocean surface bubble optical fiber detection device designed by the utility model.

[0025] Among them, 1. Main floating body, 1-1. Bottom floating body, 1-2. Upper floating body, 1-2-1. Bottom plate, 1-2-2. Geometric body, 1-3. Top cover, 1-4. Fixing device, 1-5. Sealing ring, 1-6. Press-type bracelet, 1-7. Watertight connector, 2. Optical fiber probe element processing circuit, 3. Optical fiber probe acquisition circuit, 4. Near-surface bubble measurement optical fiber probe array, 5. Spray bubble measurement optical fiber probe array, 6. Satellite communication unit processing circuit, 7. Satellite communication preset interface, 8. Optical fiber sensitive element, 9. Transmission optical fiber, 10. Primary buffer protection structure, 11. Secondary buffer protection structure, 12. Tertiary protection buffer structure. DETAILED IMPLEMENTATION MANNER

[0026] The following further elaborates on the detailed implementation manner of the utility model in conjunction with the attached drawings of the specification.

[0027] The utility model designs an ocean surface bubble optical fiber detection device. In practical applications, such as Figure 1 and Figure 2 shown, the design includes a main floating body 1, an optical fiber probe array element processing circuit 2, an optical fiber probe acquisition circuit 3, a satellite communication unit processing circuit 6, and a near-surface bubble measurement optical fiber probe array 4 and a spray bubble measurement optical fiber probe array 5 arranged on the outer surface of the main floating body 1. Among them, the main floating body 1 has a sealed cavity inside, and the optical fiber probe array element processing circuit 2, the optical fiber probe acquisition circuit 3, and the satellite communication unit processing circuit 6 are located in the sealed cavity of the main floating body 1. The near-surface bubble measurement optical fiber probe array 4 and the spray bubble measurement optical fiber probe array 5 are respectively connected to the optical fiber probe acquisition circuit 3 through the optical fiber probe array element processing circuit 2, and the satellite communication unit processing circuit 6 is connected to the optical fiber probe acquisition circuit 3. The position height of the near-surface bubble measurement optical fiber probe array 4 is lower than the position height of the spray bubble measurement optical fiber probe array 5. Based on the near-surface bubble measurement optical fiber probe array 4 and the spray bubble measurement optical fiber probe array 5 being mounted on the main floating body 1 and floating on the water surface, the near-surface bubble measurement optical fiber probe array 4 detects the water surface bubbles, and the spray bubble measurement optical fiber probe array 5 detects the spray bubbles above the water surface. The satellite communication unit processing circuit 6 externally connects a control signal to the optical fiber probe acquisition circuit 3, or the satellite communication unit processing circuit 6 externally transmits the signals received by the optical fiber probe acquisition circuit 3.

[0028] In application, the optical fiber probe acquisition circuit 3 can store the bubble information collected by the near-surface bubble measurement optical fiber probe array 4 and the spray bubble measurement optical fiber probe array 5 and uploaded through the optical fiber probe array element processing circuit 2. Further, it can be uploaded to the survey ship in real time by the optical fiber probe acquisition circuit 3, or transmitted to the shore-based workstation through the satellite communication unit processing circuit 6 for further revealing the generation and disappearance law of sea surface bubbles in the field of ocean exploration.

[0029] Regarding the above technical solution of the designed ocean surface bubble optical fiber detection device, in practical applications, the structure of the main floating body 1 is designed, such as Figure 1 and Figure 2 shown. The specific design includes a bottom floating body 1-1, an upper floating body 1-2, and a top cover 1-3. Among them, as Figure 3 shown, the bottom floating body 1-1 has a cavity inside, the upper surface of the bottom floating body 1-1 is open, and the optical fiber probe array element processing circuit 2 is placed in the cavity of the bottom floating body 1-1. As Figure 4As shown in the figure, the upper floating body 1-2 includes a bottom plate 1-2-1 and a geometric body 1-2-2. The outer diameter of the cross-section of the geometric body 1-2-2 is smaller than that of the bottom floating body 1-1. The geometric body 1-2-2 has an internal cavity. The lower surface of the geometric body 1-2-2 is open and communicates with its cavity. A through hole penetrating both sides is provided at the center position of the bottom plate 1-2-1, and the diameter of the through hole is equal to the diameter of the open mouth on the lower surface of the geometric body 1-2-2. The edge of the open mouth on the lower surface of the geometric body 1-2-2 is butt-jointed with the edge of the through hole on the upper surface of the bottom plate 1-2-1. A through hole communicating with its cavity is provided at the center position of the upper surface of the geometric body 1-2-2. The inner diameter of this through hole is adapted to the outer diameter of the top cover 1-3. The top cover 1-3 is detachably sealed in the through hole on the upper surface of the geometric body 1-2-2 for covering the through hole on the upper surface of the geometric body 1-2-2. The optical fiber probe acquisition circuit 3 and the satellite communication unit processing circuit 6 are placed in the cavity of the geometric body 1-2-2. The shape and size of the periphery of the bottom plate 1-2-1 are the same as those of the periphery of the open mouth on the upper surface of the bottom floating body 1-1. The bottom plate 1-2-1 is detachably sealed in the open mouth on the upper surface of the bottom floating body 1-1.

[0030] In the further application of the above combined design of the bottom floating body 1-1 and the upper floating body 1-2 of the main floating body 1, such as Figure 3 As shown in the figure, a sealing ring 1-5 is designed to be added. The bottom floating body 1-1 and the geometric body 1-2-2 in the upper floating body 1-2 are both cylinders. An annular part with an external thread is provided on the lower surface of the bottom plate 1-2-1 in the upper floating body 1-2, and the central axis of the annular part is collinear with the central axis of the bottom plate 1-2-1. The outer diameter of the annular part is adapted to the inner diameter of the open mouth on the upper surface of the bottom floating body 1-1. An internal thread is provided on the inner circumference of the open mouth on the upper surface of the bottom floating body 1-1, and the sealing ring 1-5 is arranged on the inner circumference of the open mouth on the upper surface of the bottom floating body 1-1. Through the engagement between the external thread of the annular part on the lower surface of the bottom plate 1-2-1 in the upper floating body 1-2 and the internal thread of the open mouth on the upper surface of the bottom floating body 1-1, the bottom plate 1-2-1 in the upper floating body 1-2 is rotationally sealed in the open mouth on the upper surface of the bottom floating body 1-1. The sealing ring 1-5 is used to ensure the watertightness of the cavity in the bottom floating body 1-1.

[0031] With the specific structural design of the above main floating body 1, the carried optical fiber probe acquisition circuit 3, in application, such as Figure 4 As shown in the figure, it can be designed as a circular ring structure. The optical fiber probe array element processing circuit 2 is connected to a cable and passes through the middle hole of the circular ring structure of the optical fiber probe acquisition circuit 3 and is butt-jointed to the optical fiber probe acquisition circuit 3 to realize the connection between the optical fiber probe array element processing circuit 2 and the optical fiber probe acquisition circuit 3. And the design of the circular ring structure of the optical fiber probe acquisition circuit 3 realizes the stability of the distribution of each device in the main floating body 1 and obtains central balance.

[0032] For the further application of the specific structure of the main floating body 1, such as Figure 2 andFigure 3 As shown, at least two fixing devices 1-4 are added, and a push-type bracelet 1-6 is arranged on the upper surface of the top cover 1-3. Among them, the push-type bracelet 1-6 ensures the operation during the maintenance and repair of the sensor; each fixing device 1-4 is respectively arranged on the inner surface of the bottom floating body 1-1 and the inner surface of the geometric body 1-2-2 in the upper floating body 1-2, and the position of the optical fiber probe array element processing circuit 2 and the optical fiber probe acquisition circuit 3 is limited and fixed by each fixing device 1-4 respectively.

[0033] In addition, regarding the satellite communication unit processing circuit 6, as Figure 2 shown, a satellite communication preset interface 7 is further designed. The satellite communication preset interface 7 is arranged on the upper surface of the top cover 1-3 and is detachably sealed in the through hole on the upper surface of the geometric body 1-2-2 based on the top cover 1-3. The satellite communication preset interface 7 is detachably connected to the satellite communication unit processing circuit 6, and through the satellite communication preset interface 7 and the satellite communication unit processing circuit 6, the requirement of transmitting data using satellite communication is realized.

[0034] In the actual application of the above design scheme, as Figure 6 shown, the near-surface bubble measurement optical fiber probe array 4 and the droplet bubble measurement optical fiber probe array 5 each include respective optical fiber probe array elements. Among them, each optical fiber probe array element in the near-surface bubble measurement optical fiber probe array 4 is arranged around the outer side surface of the bottom floating body 1-1, and the adjacent optical fiber probe array elements are equally spaced; each optical fiber probe array element in the droplet bubble measurement optical fiber probe array 5 is arranged on the upper surface of the bottom plate 1-2-1 in the upper floating body 1-2 and around the geometric body 1-2-2, and the adjacent optical fiber probe array elements are equally spaced; each optical fiber probe array element in the near-surface bubble measurement optical fiber probe array 4 and each optical fiber probe array element in the droplet bubble measurement optical fiber probe array 5 are respectively connected to the optical fiber probe acquisition circuit 3 through the optical fiber probe array element processing circuit 2.

[0035] In order to further realize the arrangement of each optical fiber probe array element in the above-mentioned droplet bubble measurement optical fiber probe array 5, each waterproof connector 1-7 is further designed to be added. The number of the waterproof connectors 1-7 is equal to the number of the optical fiber probe array elements in the near-surface bubble measurement optical fiber probe array 4, and each optical fiber probe array element in the near-surface bubble measurement optical fiber probe array 4 corresponds to each waterproof connector 1-7 one by one; each waterproof connector 1-7 is arranged around the outer side surface of the bottom floating body 1-1, and the adjacent waterproof connectors 1-7 are equally spaced. Each waterproof connector 1-7 passes through the outer side surface of the bottom floating body 1-1 and is connected to the optical fiber probe array element processing circuit 2 in its cavity, and each optical fiber probe array element in the near-surface bubble measurement optical fiber probe array 4 is respectively detachably connected to the corresponding waterproof connector 1-7.

[0036] Applying the above-designed ocean surface bubble optical fiber detection device to the actual situation, asFigure 5 As shown, the specific design of the fiber optic probe element includes a fiber optic sensitive element 8, a transmission optical fiber 9, a primary buffer protection structure 10, a secondary buffer protection structure 11, and a tertiary protection buffer structure 12. Among them, the transmission optical fiber 9 includes a transmitting optical fiber and a reflecting optical fiber arranged in parallel. The front ends of the transmitting optical fiber and the reflecting optical fiber form the front end of the transmission optical fiber 9. The transmitting optical fiber uses a single-mode optical fiber, and the reflecting optical fiber uses a multi-mode optical fiber to ensure that the difference in the return light power obtained by the probe before and after piercing the bubble is maximized, which is conducive to the fiber optic probe element processing circuit to complete signal processing and does not require a photodetector with extremely high detection resolution.

[0037] As Figure 5 As shown, a primary buffer protection structure 10 is wrapped around a local section of the transmission optical fiber 9 from a position at a preset distance from its front end to its end. A secondary buffer protection structure 11 is wrapped around a local section of the primary buffer protection structure 10 from a position at a preset distance from its front end facing the front end of the transmission optical fiber 9 to its end. A tertiary protection buffer structure 12 is wrapped around a local section of the secondary buffer protection structure 11 from a position at a preset distance from its front end facing the front end of the transmission optical fiber 9 to its end. The tertiary encapsulation structure not only minimizes the interference to the flow at the front end of the probe but also meets the reliability and stability requirements of the probe for working in a wind and wave environment.

[0038] As Figure 5 As shown, the end of the transmission optical fiber 9 is used to connect to the fiber optic probe element processing circuit 2. The fiber optic sensitive element 8 uses a conical glass lens, which solves the problem that the bare optical fiber is fragile and not suitable as a sensitive element in a harsh marine environment. The conical glass lens is connected to the front end of the transmission optical fiber 9 through a glass ferrule, meeting the requirements of good coupling between the transmitting optical fiber and the reflecting optical fiber and a feasible processing technology.

[0039] For the application of the fiber optic probe element processing circuit 2, the specific design includes a light source driving circuit, a photoelectric conversion circuit, and a bias amplification circuit. The output end of the light source driving circuit is connected to the end of the transmitting optical fiber, and the light source driving circuit provides a light source for the transmitting optical fiber. The end of the reflecting optical fiber is connected to the input end of the photoelectric conversion circuit, and the photoelectric conversion circuit converts the optical signal received by the reflecting optical fiber into an electrical signal. The output end of the photoelectric conversion circuit is connected to the input end of the bias amplification circuit, and the bias amplification circuit amplifies the converted electrical signal output by the photoelectric conversion circuit. The output end of the bias amplification circuit is connected to the fiber optic probe acquisition circuit 3.

[0040] As Figure 6As shown, in the design, the near-surface bubble measurement fiber optic probe array 4 and the droplet bubble measurement fiber optic probe array 5 are such that the fiber optic probe elements are vertically or circularly distributed. The vertical distribution is used to obtain the movement speed, size, and quantity of bubbles during the rising process at a depth of 40 - 50 cm underwater at the measurement point. The circular distribution is used to obtain the size and quantity of bubbles in the surrounding area of the working chamber at multiple measurement points. And the droplet bubble measurement fiber optic probe array 5 is used to measure the size and quantity of bubbles formed by splashing and jetting.

[0041] In the application, as Figure 6 shown, the cavity in the main floating body 1 is also designed to reserve more space for placing counterweights to ensure that the near-surface bubble measurement fiber optic probe array can operate at about 1 cm above the water surface in different ocean environments. In the actual application implementation, the near-surface bubble measurement fiber optic probe array 4 is mainly used to sense the movement information corresponding to the rising process of bubbles at a depth of 40 - 50 cm of the entrained seawater, as well as the physical size information during the process of briefly staying on the sea surface. The measurement of the movement information during the rising process is achieved by arranging multiple fiber optic probe elements in the vertical direction, and the process of briefly staying on the sea surface is achieved by arranging multiple fiber optic probe elements in the circular direction. The droplet bubble measurement fiber optic probe array 5 is used to measure the physical size information of various droplet bubbles caused by wind and waves. Since the droplet bubbles will impact the fiber optic probe elements under the action of the wind and wave field, the fiber optic probe elements sense the movement information and physical size information of the droplet bubbles. The combined measurement of the two arrays can achieve the measurement of bubble parameters at multiple points and multiple profiles.

[0042] The above technical solution designs an ocean surface bubble fiber optic detection device, with the main floating body 1 designed with a near-surface bubble measurement fiber optic probe array 4 and a droplet bubble measurement fiber optic probe array 5 to respectively achieve multi-point detection of surface bubbles and multi-point detection of droplet bubbles at positions above the water surface. Specifically, the structure of the main floating body 1 is designed, and the fiber optic probe element processing circuit 2, the fiber optic probe acquisition circuit 3, and the satellite communication unit processing circuit 6 are reasonably arranged and coordinated for application, which can collect micron-scale sea surface layer bubbles with an entrainment depth of 40 cm - 50 cm, efficiently achieve the simultaneous detection of surface bubble data at multiple measurement points, and effectively improve the detection efficiency of ocean surface layer bubbles.

[0043] The above has described the embodiments of the present utility model in detail with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present utility model.

Claims

1. An optical fiber detection device for bubbles on the ocean surface, characterized in that: The invention comprises a main floating body (1), an optical fiber probe array element processing circuit (2), an optical fiber probe collection circuit (3), and a near-water-surface bubble measurement optical fiber probe array (4) and a droplet bubble measurement optical fiber probe array (5) arranged on the outer surface of the main floating body (1); wherein the main floating body (1) has a built-in sealed cavity, and the optical fiber probe array element processing circuit (2) and the optical fiber probe collection circuit (3) are located in the sealed cavity of the main floating body (1); the near-water-surface bubble measurement optical fiber probe array (4) and the droplet bubble measurement optical fiber probe array (5) are respectively connected via optical fibers. The probe array element processing circuit (2) is connected to the optical fiber probe acquisition circuit (3); the position height of the near-water-surface bubble measurement optical fiber probe array (4) is lower than the position height of the droplet bubble measurement optical fiber probe array (5); based on the near-water-surface bubble measurement optical fiber probe array (4) and the droplet bubble measurement optical fiber probe array (5) being mounted on the main buoy (1) and floating on the water surface, the near-water-surface bubble measurement optical fiber probe array (4) detects water-surface bubbles, and the droplet bubble measurement optical fiber probe array (5) detects droplet bubbles located above the water surface.

2. The optical fiber detection device for ocean surface bubbles according to claim 1, characterized in that: The invention also comprises a satellite communication unit processing circuit (6) located in the sealed cavity of the main floating body (1), the satellite communication unit processing circuit (6) being connected to the optical fiber probe acquisition circuit (3), and the satellite communication unit processing circuit (6) sending an external control signal to the optical fiber probe acquisition circuit (3), or the satellite communication unit processing circuit (6) sending a signal received by the optical fiber probe acquisition circuit (3) externally.

3. The optical fiber detection device for ocean surface bubbles according to claim 2, characterized in that: The main floating body (1) comprises a bottom floating body (1-1), an upper floating body (1-2), and a top cover (1-3), wherein the bottom floating body (1-1) has a built-in cavity, the upper surface of the bottom floating body (1-1) is open, and the optical fiber probe array element processing circuit (2) is placed in the cavity of the bottom floating body (1-1); the upper floating body (1-2) comprises a bottom plate (1-2-1) and a geometric body (1-2-2), the cross-sectional outer diameter of the geometric body (1-2-2) is smaller than the cross-sectional outer diameter of the bottom floating body (1-1), the geometric body (1-2-2) has a built-in cavity, the lower surface of the geometric body (1-2-2) is open and connected to the cavity, a through hole penetrating both surfaces of the bottom plate (1-2-1) is arranged at the center position, and the diameter of the through hole is equal to the diameter of the open opening on the lower surface of the geometric body (1-2-2), and the bottom plate (1-2-1) is provided with a through hole penetrating both surfaces thereof. The edge of the lower surface opening of the geometric body (1-2-2) is connected to the edge of the through hole on the upper surface of the bottom plate (1-2-1) around the edge of the lower surface opening of the geometric body (1-2-2). A through hole connected to the cavity is arranged at the center of the upper surface of the geometric body (1-2-2). The inner diameter of the through hole is adapted to the outer diameter of the top cover (1-3). The top cover (1-3) is detachably sealed and placed in the through hole on the upper surface of the geometric body (1-2-2) to cover the through hole on the upper surface of the geometric body (1-2-2). The optical fiber probe acquisition circuit (3) and the satellite communication unit processing circuit (6) are placed in the cavity of the geometric body (1-2-2). The shape and size of the bottom plate (1-2-1) are the same as the shape and size of the upper surface opening of the bottom floating body (1-1). The bottom plate (1-2-1) is detachably sealed and placed in the upper surface opening of the bottom floating body (1-1).

4. The optical fiber detection device for ocean surface bubbles according to claim 3, characterized in that: It also includes a sealing ring (1-5); the bottom float (1-1) and the geometric body (1-2-2) in the upper float (1-2) are all cylindrical; an annular member with external threads is arranged on the lower surface of the bottom plate (1-2-1) in the upper float (1-2); the central axis of the annular member is colinear with the central axis of the bottom plate (1-2-1); the outer diameter of the annular member is adapted to the inner diameter of the open opening on the upper surface of the bottom float (1-1); an internal thread is arranged on the inner periphery of the open opening on the upper surface of the bottom float (1-1); and the sealing ring (1-5) is arranged on the inner periphery of the open opening on the upper surface of the bottom float (1-1); and through the meshing between the external thread of the annular member on the lower surface of the bottom plate (1-2-1) in the upper float (1-2) and the internal thread of the open opening on the upper surface of the bottom float (1-1), a rotating seal of the bottom plate (1-2-1) in the upper float (1-2) is placed on the open opening on the upper surface of the bottom float (1-1).

5. The optical fiber detection device for ocean surface bubbles according to claim 3, characterized in that: The optical fiber probe acquisition circuit (3) is a circular ring structure, and the optical fiber probe array element processing circuit (2) is connected to the cable and passes through the middle hole of the circular ring structure of the optical fiber probe acquisition circuit (3) and is connected to the optical fiber probe acquisition circuit (3), thereby realizing the connection between the optical fiber probe array element processing circuit (2) and the optical fiber probe acquisition circuit (3).

6. The optical fiber detection device for ocean surface bubbles according to claim 3, characterized in that: It also includes a satellite communication preset interface (7), at least two fixing devices (1-4), and a press-type wristband (1-6) arranged on the upper surface of the top cover (1-3), each fixing device (1-4) being respectively arranged on the inner surface of the bottom floating body (1-1) and the inner surface of the geometric body (1-2-2) in the upper floating body (1-2), and each fixing device (1-4) is used to positionally limit and fix the optical fiber probe array element processing circuit (2) and the optical fiber probe acquisition circuit (3); the satellite communication preset interface (7) is arranged on the upper surface of the top cover (1-3), and is placed in a through hole on the upper surface of the geometric body (1-2-2) based on the detachable sealing of the top cover (1-3), and the satellite communication preset interface (7) is detachably connected to the satellite communication unit processing circuit (6).

7. The optical fiber detection device for ocean surface bubbles according to claim 3, characterized in that: The near-water-surface bubble measurement optical fiber probe array (4) and the splash bubble measurement optical fiber probe array (5) each include optical fiber probe array elements, wherein the optical fiber probe array elements in the near-water-surface bubble measurement optical fiber probe array (4) are arranged around the outer side surface of the bottom floating body (1-1), and adjacent optical fiber probe array elements are equally spaced; the optical fiber probe array elements in the splash bubble measurement optical fiber probe array (5) are arranged on the upper surface of the bottom plate (1-2-1) of the upper floating body (1-2), around the geometric body (1-2-2), and adjacent optical fiber probe array elements are equally spaced; the optical fiber probe array elements in the near-water-surface bubble measurement optical fiber probe array (4) and the optical fiber probe array elements in the splash bubble measurement optical fiber probe array (5) are connected to the optical fiber probe acquisition circuit (3) via the optical fiber probe array element processing circuit (2).

8. The optical fiber detection device for ocean surface bubbles according to claim 7, characterized in that: It also includes watertight connectors (1-7), the number of which is equal to the number of optical fiber probe array elements in the near-water-surface bubble measurement optical fiber probe array (4), and each optical fiber probe array element in the near-water-surface bubble measurement optical fiber probe array (4) corresponds to each watertight connector (1-7) one by one; each watertight connector (1-7) is arranged around the outer side surface of the bottom floating body (1-1), and adjacent watertight connectors (1-7) are equally spaced, each watertight connector (1-7) passes through the outer side surface of the bottom floating body (1-1) to connect to the optical fiber probe array element processing circuit (2) in its cavity, and each optical fiber probe array element in the near-water-surface bubble measurement optical fiber probe array (4) is detachably connected to the corresponding watertight connector (1-7).

9. An optical fiber detection device for ocean surface bubbles according to claim 7 or 8, characterized in that: The optical fiber probe array element comprises an optical fiber sensitive element (8), a transmission optical fiber (9), a primary buffer protection structure (10), a secondary buffer protection structure (11), and a tertiary protection buffer structure (12), wherein the primary buffer protection structure (10) is wrapped on a local section of the transmission optical fiber (9) from a preset distance position at the front end to the end thereof, the secondary buffer protection structure (11) is wrapped on a local section of the primary buffer protection structure (10) from a preset distance position at the front end facing the transmission optical fiber (9) to the end thereof, and the tertiary protection buffer structure (12) is wrapped on a local section of the secondary buffer protection structure (11) from a preset distance position at the front end facing the transmission optical fiber (9) to the end thereof, the end of the transmission optical fiber (9) is used to connect to an optical fiber probe array element processing circuit (2), and the optical fiber sensitive element (8) is connected to the front end of the transmission optical fiber (9) via a glass insert.

10. The optical fiber detection device for ocean surface bubbles according to claim 9, characterized in that: The optical fiber probe array element processing circuit (2) includes a light source driving circuit, a photoelectric conversion circuit, and a bias amplifier circuit. The transmission optical fiber (9) includes a transmitting optical fiber and a reflecting optical fiber arranged in parallel. The front end of the transmitting optical fiber and the front end of the reflecting optical fiber constitute the front end of the transmission optical fiber (9). The output end of the light source driving circuit is connected to the end of the transmitting optical fiber, and the light source driving circuit provides a light source for the transmitting optical fiber. The end of the reflecting optical fiber is connected to the input end of the photoelectric conversion circuit, and the photoelectric conversion circuit converts the optical signal received by the reflecting optical fiber into an electrical signal. The output end of the photoelectric conversion circuit is connected to the input end of the bias amplifier circuit, and the bias amplifier circuit amplifies the converted electrical signal output by the photoelectric conversion circuit. The output end of the bias amplifier circuit is connected to the optical fiber probe acquisition circuit (3).

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