Deep sea subsurface buoy system suitable for refined observation of bottom boundary layer

Abstract

The utility model discloses a deep sea subsurface buoy system suitable for fine observation of a bottom boundary layer, which comprises a seabed base, a plurality of single-point flow velocity observation units and a main floating body which are sequentially connected from bottom to top, the plurality of single-point flow velocity observation units are arranged between the seabed base and the main floating body along the tensile cable, and each single-point flow velocity observation unit is integrated with a deepwater single-point current meter and a CTD; an acoustic Doppler flow velocity profiler is installed in the main floating body, and the acoustic Doppler flow velocity profiler, an ADV, a CTD and a double-parallel acoustic releaser are integrated on the seabed base. According to the utility model, an observation blind area is eliminated through structure optimization, and a core area (5-10m) of a bottom boundary layer can be brought into an observation range; multiple observation units with vertical spacing can capture full-water-depth ocean current change details, and the data resolution is improved; due to the arrangement of the double parallel acoustic releasers, the equipment reliability is improved, and the risk of recovery failure is effectively reduced; and long-term continuous observation can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ocean observation, and particularly relates to a deep sea subsurface buoy system suitable for fine observation of bottom boundary layer. BACKGROUND

[0002] The deep sea subsurface buoy is mainly used for target positioning and deep sea acoustic signal measurement under water of 6000 meters. The existing deep sea subsurface buoy system has the following defects in bottom boundary layer observation:

[0003] 1. Observation blind area: the releaser and the gravity anchor of the traditional subsurface buoy system are connected through the anchor chain, resulting in a blind area of tens of meters below the releaser, which cannot cover the core area (50-300 meters from the seabed) of the bottom boundary layer;

[0004] 2. Low reliability: the releaser is prone to collision damage due to complex seabed topography during subsurface buoy deployment, and the recovery success rate is limited. UTILITY MODEL CONTENT

[0005] The utility model aims at solving the above-mentioned defects of the prior art and provides a deep sea subsurface buoy system suitable for fine observation of bottom boundary layer.

[0006] To solve the above-mentioned technical problems, the utility model adopts the technical scheme of a deep sea subsurface buoy system suitable for fine observation of bottom boundary layer, which comprises a seabed base, a plurality of single-point flow rate observation units and a main float connected in sequence from bottom to top, wherein the seabed base and the main float are connected through a tensile cable, and the plurality of single-point flow rate observation units are arranged between the seabed base and the main float along the tensile cable; an acoustic Doppler current profiler is installed in the main float, each single-point flow rate observation unit is integrated with a deep water single-point current meter and a CTD (temperature-salinity-depth sensor), and the seabed base is integrated with an acoustic Doppler current profiler, an ADV (acoustic Doppler current meter), a CTD (temperature-salinity-depth sensor) and a double-parallel acoustic releaser.

[0007] Further, the seabed base comprises a gravity anchor base and a mounting frame fixedly installed on the gravity anchor base, and the mounting frame is internally provided with a supporting angle steel; the double-parallel acoustic releaser is arranged at the center position of the mounting frame and is fixedly connected with the mounting frame through a fixing plate, and the bottom thereof is connected with the top end surface of the gravity anchor base through a locking mechanism; the acoustic Doppler current profiler is fixedly installed at the top end of the mounting frame and is located beside the double-parallel acoustic releaser.

[0008] Further, the installation frame is internally provided with an upper fixing plate, a middle fixing plate and a lower fixing plate, wherein the center of the upper fixing plate is provided with a circular through hole, the cross section of the middle fixing plate is in a rounded convex character structure, and the upper fixing plate is provided with a circular through hole and an elliptical through hole, and the lower fixing plate is provided with an elliptical through hole; the center of the circular through hole of the upper fixing plate and the middle fixing plate is aligned, and is used for fixing and installing the acoustic Doppler current profiler; the elliptical through hole of the middle fixing plate is aligned with the center of the lower fixing plate, and is used for fixing the double-parallel acoustic release.

[0009] Further, the locking mechanism comprises a lower locking piece, an upper locking piece and a corresponding locking nut; the upper locking piece is hung on the release connector at the bottom of the double-parallel acoustic release, and both ends of the upper locking piece are provided with nut seats; the lower locking piece is in a U-shaped structure, both ends of the lower locking piece are provided with external threads, and after penetrating the hanging ring on the top surface of the gravity anchor base, both ends of the lower locking piece penetrate the nut seats on the corresponding sides, and are fixed through the locking nut.

[0010] Further, the acoustic Doppler current profiler is further provided with a protection frame outside, and the protection frame is welded and fixed on the installation frame.

[0011] Further, each single-point flow velocity observation unit is provided with a group of floating ball groups located above the single-point flow velocity observation unit; the deep-water single-point current meter in the single-point flow velocity observation unit is located above the CTD; and the mutual spacing between the plurality of single-point flow velocity observation units is adjustable.

[0012] Further, after being placed into water, the seabed base touches the bottom, and the observation range is within 10 meters upward from the seabed; and the main float body is located at a distance of 450 meters from the sea surface.

[0013] Further, the acoustic Doppler current profiler in the main float body is selected as 75 kHz, and the acoustic Doppler current profiler in the seabed base is selected as 1200 kHz.

[0014] Further, the actual mass of the gravity anchor base cannot be less than 600 kg.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The design of the seabed base in the utility model can include the bottom boundary layer core area (5-10 meters) into the observation range, and the observation blind area is eliminated through structure optimization;

[0017] 2. The multiple observation units with vertical spacing can capture the details of the sea current change in the whole water depth, and improve the data resolution;

[0018] 3. The whole system is connected into a straight line through the rope, each device is placed one by one, and double parallel acoustic releasers are arranged on the seabed base, the reliability of the lifting device is improved, and the convenience of deep-sea buoy deployment and the risk of recovery failure are reduced.

[0019] 4. The system can support continuous operation for more than 6 months, obtain intra-seasonal and inter-annual variation data, and realize long-term continuous fine observation of the bottom boundary layer. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an overall structure schematic view of the utility model;

[0021] Figure 2 It is a structure schematic view of the seabed base in the utility model;

[0022] Figure 3 It is a structure schematic view of the gravity anchor base in the seabed base;

[0023] Figure 4 It is a structure schematic view of the mounting frame in the seabed base;

[0024] Figure 5 It is a structure schematic view of the upper fixed plate in the seabed base;

[0025] Figure 6 It is a structure schematic view of the middle fixed plate in the seabed base;

[0026] Figure 7 It is a structure schematic view of the lower fixed plate in the seabed base;

[0027] Figure 8 It is a structure schematic view of the protection frame in the seabed base;

[0028] Figure 9 It is a structure schematic view of the single-point flow velocity observation unit in the utility model;

[0029] In the drawing: 1, seabed base, 2, single-point flow velocity observation unit, 3, main float, 4, tensile cable, 11, gravity anchor base, 12, mounting frame, 13, double parallel acoustic releasers, 14, acoustic Doppler current profiler, 15, temperature-salinity-depth sensor, 16, protection frame, 17, upper fixed plate, 18, middle fixed plate, 19, lower fixed plate, 20, locking mechanism, 21, deep-water single-point current meter, 22, CTD (temperature-salinity-depth sensor), 23, float ball group. DETAILED DESCRIPTION

[0030] It should be noted that in the description of this utility model, terms such as "upper", "middle", "lower", "left", "right", "inner", "outer", "aligned", and "relative" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are only used to facilitate the description of the structural relationship between the components in this utility model and do not specifically mean that any component in this utility model must have a specific orientation, be constructed and operated in a specific orientation, or be construed as a limitation on this utility model.

[0031] Furthermore, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0033] like Figure 1 As shown, a deep-sea mooring system suitable for fine-grained observation of the bottom boundary layer is mainly used for long-term continuous observation of elements such as current velocity, temperature, salinity, and turbulent mixing in the bottom boundary layer region of complex deep-sea topography. It includes a seabed base 1, multiple single-point current velocity observation units 2, and a main float 3 connected sequentially from bottom to top. The seabed base 1 and the main float 3 are connected by tensile cables 4, and the multiple single-point current velocity observation units 2 are connected and arranged between the seabed base 1 and the main float 3 along the tensile cables 4.

[0034] Combination Figures 2 to 8As shown, the seabed base 1 comprises a gravity anchor base 11 and a mounting frame 12 fixedly mounted above the gravity anchor base 11, and a frame foot brace is arranged at the connection between the two; the mounting frame 12 is integrally formed by welding and can be divided into a middle layer, an upper middle layer and an upper layer, wherein a lower fixed plate 19 is fixedly mounted in the middle layer structure by a support angle steel, and an oval through hole is arranged on the lower fixed plate 19; a middle fixed plate 18 is fixedly mounted in the upper middle layer structure by a support angle steel, and the cross section of the middle fixed plate 18 is a rounded convex letter structure, and an oval through hole and a circular through hole are arranged on the middle fixed plate 18; an upper fixed plate 17 is fixedly mounted in the upper layer structure, and a circular through hole is arranged at the center position of the upper fixed plate 17; and the oval through hole on the lower fixed plate 19 is aligned with the center of the oval through hole on the middle fixed plate 18, and the circular through hole on the middle fixed plate 18 is aligned with the center of the circular through hole on the upper fixed plate 17. The seabed base 1 is integrally mounted with an acoustic Doppler current profiler 14, an ADV (acoustic Doppler current meter), a CTD (temperature-salinity-depth sensor 15) and a double-parallel acoustic release 13, wherein the double-parallel acoustic release 13 is fixedly inserted into the oval through holes of the middle fixed plate 18 and the lower fixed plate 19 and is located at the center position of the entire mounting frame 12, and the lower end thereof is further connected to the gravity anchor base 11 through a locking mechanism 20; the actual mass of the gravity anchor base 11 is not less than 600 kg, and a hanging ring is fixedly mounted at the center position of the top surface of the gravity anchor base 11; the locking mechanism 20 comprises a lower locking part, an upper locking part and a locking nut corresponding thereto, wherein the upper locking part is hung on the release connecting part at the bottom of the double-parallel acoustic release 13, both ends of the upper locking part are provided with nut seats, the lower locking part is in a U-shaped structure, both ends of the lower locking part are provided with external threads, after penetrating through the hanging ring on the top surface of the gravity anchor base 11, both ends of the lower locking part penetrate through the nut seats on the corresponding sides of the upper locking part and are fixed by the locking nut. The acoustic Doppler current profiler 14 is vertically fixedly inserted into the circular through holes of the upper fixed plate 17 and the middle fixed plate 18, and a protection frame 16 is sleeved on the outer side of the acoustic Doppler current profiler 14, and the bottom of the protection frame 16 is fixedly mounted on the top end of the mounting frame 12. The CTD (temperature-salinity-depth sensor 15) is fixedly mounted on the support beam in the upper layer structure of the mounting frame 12 by a clamp.

[0035] The plurality of single-point flow velocity observation units 2 can be adjusted according to the number of devices and the water depth of the specific observation position, and each single-point flow velocity observation unit 2 comprises a deep-water single-point ocean current meter 21 and a CTD (temperature-salinity-depth sensor) 22, as shown in Figure 9 The deep-water single-point ocean current meter 21 is located above the CTD (temperature-salinity-depth sensor) 22 and collects flow velocity, temperature and salinity mixed data; and each single-point flow velocity observation unit 2 is equipped with a group of float ball groups 23, each group of float ball groups 23 is composed of three float balls and is located above the corresponding single-point flow velocity observation unit 2.

[0036] The main float 3 is installed with an ADCP (acoustic Doppler current profiler) of 75 kHz, which is located at a distance of 450 meters from the sea surface after being placed in water, and is used to realize the flow profile observation from the surface to the position of the main float 3.

[0037] After being placed in water, the seabed base 1 touches the bottom, wherein the integrated acoustic Doppler current profiler is selected to be 1200 kHz, and the observation range is 10 meters upward from the seabed, so as to realize the flow profile and turbulence observation within 10 meters upward from the seabed.

[0038] The specific deployment process is as follows: after the research ship reaches the target sea area, first, the various instruments and equipment are set, the system is tested, and the installation is tested; then, the water depth is measured, the wind flow is determined, and the water entry point is positioned by using acoustic positioning; then, the main float 3, the single-point flow observation unit 2 and the seabed base 1 are hoisted in turn, and it is ensured that the anti-tension cable 4 is not wound; during the water entry process of the seabed base 1, until the seabed base 1 touches the bottom, the system enters the observation mode. The single-point flow observation unit 2 collects data every 10 minutes, and the ADCP on the seabed base 1 obtains profile data every 1 hour, and the data are stored in the waterproof module, and are exported and analyzed after the submersible buoy system is recovered. It can be widely applied to the study of ocean circulation (such as the vertical branch analysis of meridional overturning circulation), the exploration of marine resources (the correlation study of seabed topography and mixing process), and the climate prediction (the modeling of ocean material and energy circulation).

[0039] The related technical features not yet described in detail in the above embodiment can be realized by using or referring to the related technical solutions in the prior art.

[0040] Of course, the above description is not a limitation of the present application, and the present application is not limited to the above examples, and the changes, modifications, additions or replacements made by the person skilled in the art within the essential scope of the present application should also belong to the protection scope of the present application.

Claims

1. A deep-sea mooring system suitable for bottom boundary layer refinement observations, characterized in that: The application relates to a sea bed base, a plurality of single-point flow velocity observation units and a main floating body which are connected in sequence from bottom to top, wherein the sea bed base and the main floating body are connected through a tensile cable, the plurality of single-point flow velocity observation units are arranged between the sea bed base and the main floating body along the tensile cable, an acoustic Doppler current profiler is arranged in the main floating body, each single-point flow velocity observation unit is integrated with a deep-water single-point current meter and a CTD (temperature-salinity-depth sensor), and an acoustic Doppler current profiler, an ADV (acoustic Doppler velocity meter), a CTD (temperature-salinity-depth sensor) and a double-parallel acoustic release are integrated on the sea bed base.

2. The deep-sea buoy system suitable for bottom boundary layer refined observation according to claim 1, characterized in that: The sea bed base comprises a gravity anchor base, a mounting frame fixedly mounted on the gravity anchor base and provided with a supporting angle steel in the inside, the double-parallel acoustic release is arranged at the center of the mounting frame and fixedly connected with the mounting frame through a fixing plate, the bottom of the double-parallel acoustic release is connected with the top surface of the gravity anchor base through a locking mechanism, and the acoustic Doppler current profiler is fixedly mounted on the top end of the mounting frame and located beside the double-parallel acoustic release.

3. The deep-sea buoy system suitable for bottom boundary layer refined observation according to claim 2, characterized in that: The mounting frame is provided with an upper fixing plate, a middle fixing plate and a lower fixing plate, a circular through hole is formed in the center of the upper fixing plate, the cross section of the middle fixing plate is in a rounded convex letter shape, circular through holes and elliptical through holes are formed in the upper fixing plate, and the lower fixing plate is provided with an elliptical through hole; the centers of the circular through holes in the upper fixing plate and the middle fixing plate are aligned to fixedly mount the acoustic Doppler current profiler; and the elliptical through hole in the middle fixing plate is aligned with the center of the lower fixing plate to fixedly mount the double-parallel acoustic release.

4. The deep-sea buoy system suitable for bottom boundary layer refined observation according to claim 2, characterized in that: The locking mechanism comprises lower locking pieces, upper locking pieces and locking nuts corresponding to the upper locking pieces; the upper locking pieces are hung on release connecting pieces at the bottom of the double-parallel acoustic release and are provided with nut seats at two ends; the lower locking pieces are in U-shaped structures and are provided with external threads at two ends, pass through hanging rings on the top surface of the gravity anchor base, pass through the nut seats at two corresponding sides and are fixed through the locking nuts.

5. The deep-sea buoy system suitable for bottom boundary layer refined observation according to claim 2, characterized in that: A protection frame is further arranged outside the acoustic Doppler current profiler and is welded and fixed on the mounting frame.

6. The deep-sea buoy system suitable for bottom boundary layer refined observation according to claim 1, characterized in that: Each single-point flow velocity observation unit is provided with a group of floating balls arranged above the single-point flow velocity observation unit, the deep-water single-point current meter is arranged above the CTD in the single-point flow velocity observation unit, and the mutual distance between the plurality of single-point flow velocity observation units is adjustable.

7. The deep-sea buoy system suitable for bottom boundary layer refined observation according to claim 1, characterized in that: After being arranged in water, the sea bed base touches the bottom, and the observation range is within 10 meters above the sea bottom; and the main floating body is located at a position 450 meters away from the sea surface.

8. The deep-sea buoy system suitable for bottom boundary layer refined observation according to claim 1, characterized in that: The acoustic Doppler current profiler in the main floating body is selected as 75 kHz, and the acoustic Doppler current profiler in the sea bed base is selected as 1200 kHz.

9. The deep-sea buoy system suitable for bottom boundary layer refined observation according to claim 2, characterized in that: The actual mass of the gravity anchor base is not less than 600 kg.

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