CN113126098A

CN113126098A - Intelligent seabed base

Info

Publication number: CN113126098A
Application number: CN202011449062.2A
Authority: CN
Inventors: 王淑青; 雷桂斌; 凌征; 朱凤芹; 王建平; 陈展翼
Original assignee: Guangdong Ocean University
Current assignee: Guangdong Ocean University
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-07-16
Anticipated expiration: 2040-12-09
Also published as: CN113126098B

Abstract

The invention discloses an intelligent seabed foundation, which comprises a seabed foundation box, a gravity anchor, a release cable, a controller and a partition. The seabed foundation box is divided into a lower box and an upper box by the partition, and the lower box is divided into a lower box and an upper box. The body is in the shape of an octagonal prism, and the upper box is in the shape of an octagonal pyramid with eight sides. The eight sides are respectively provided with a circular truncated acoustic waveguide port, which points to eight areas on the sea surface. The sectional area of the circular truncated acoustic waveguide port gradually decreases. The big end of the circular truncated acoustic waveguide port is inclined towards the sea surface, and the small end is connected to the acoustic waveguide. At the transducer, the transducer converts the underwater acoustic signal into an electrical signal, and transmits it to the controller through the signal cable. The software of the controller processes the underwater acoustic signal to enable or disable the active sounding instrument. The intelligent seabed base of the present invention avoids intentional or unintentional damage by actively issuing underwater acoustic signals to expose itself, thereby reducing losses caused by exposure.

Description

Intelligent seabed base

Technical Field

The invention relates to equipment for ocean observation, in particular to an intelligent seabed base with high recovery rate and a control method thereof.

Background

The seabed base is a measuring device working on the seabed, and various self-contained observation instruments such as ADCP (acoustic Doppler current profiler), CTD (thermohaline depth meter), OBS (ocean bottom seismograph), suspended sediment collector or other optional instruments are carried in the seabed base, and after the seabed base is arranged, the instruments can continuously observe ocean elements for a long time, particularly measure ocean dynamic parameters for a long time, and obtain underwater long-term comprehensive observation data. The seabed base has important significance for the research on the physical and chemical characteristics of ocean circulation, seabed seawater flow and deep seawater. The lowering of the seabed base to the seabed for observation and data collection is often influenced by seabed complexity factors. The carrying instrument can be divided into a non-active sound production instrument such as a CTD, the active sound production instrument such as an ADCP (acoustic Doppler current transducer) emits underwater sound signals to measure the flow velocity, the core device ADCP of the seabed base uses an acoustic wave transducer as a sensor, the acoustic wave transducer continuously emits acoustic pulses, the acoustic pulses are reflected by sediment particles and plankton which are unevenly distributed in the water body, the reflected acoustic pulse signals are received by the acoustic wave transducer, and the flow velocity is calculated by measuring Doppler frequency shift.

Most of the people think that the seabed base loss is covered by silt or dragged away by a fishing net, for example, the self-floating anti-silting seabed CN109204746B, the silt-proof seabed CN105730653B and the swing silt-proof seabed CN105675254B of the patent documents study the technology of how to prevent the silt from causing the seabed base loss. With the progress of the fish detector technology, more and more fishermen use acoustic instruments to detect fish, the document multi-beam ultrasonic fish detector CN100541230C utilizes a multi-channel transducer array to improve the intensity of received echoes, more and more accurate information such as fish schools, submarine topography and landforms can be obtained, and the fishing accuracy and the working efficiency are improved.

The ADCP actively sends out underwater acoustic signals, which are easily detected by an acoustic instrument and expose the arrangement position of a seabed base, and the underwater acoustic signals are easily lost due to high price; the loss of valuable instruments is a problem which troubles ocean investigation for a long time, and the loss of valuable instruments makes personnel in the ocean investigation unfair, untimely and impale the gas. It is necessary to develop a seabed base that avoids actively emitting underwater acoustic signals to expose itself, thereby reducing losses due to exposure.

Disclosure of Invention

The invention aims to provide an intelligent seabed base which can collect and analyze underwater sound signals and start an active acoustic instrument to work after safety is confirmed.

The technical solution adopted by the invention is as follows: the utility model provides an intelligence seabed base, its includes seabed base box, gravity anchor, release cable, controller, acoustic releaser is connected to release cable one end, and the other end is connected the gravity anchor, seabed base box is provided with initiative vocal apparatus and non-initiative vocal apparatus, and initiative vocal apparatus includes ADCP and single-point current meter at least, and the instrument except that initiative vocal apparatus is non-initiative vocal apparatus.

The seabed base also comprises a partition plate, the seabed base box body is divided into a lower box body and an upper box body by the partition plate, the acoustic releaser is arranged on the partition plate, and the active sounding instrument and the inactive sounding instrument are arranged on the upper box body; the lower box body is in an octagonal prism shape; go up the eight prismatic table forms of box for having eight sides, eight sides are provided with round platform type sound wave guide port respectively, eight regions of directional sea, round platform type sound wave guide port sectional area reduces gradually, the directional sea of big end slope of round platform type sound wave guide port, sound wave pipe, eight are connected to the tip sound wave pipe intersect in the transducer department of hydrophone, and the underwater acoustic signal that the steamer that guides eight regions produced conveys the transducer department of hydrophone, and the transducer converts the underwater acoustic signal into the signal of telecommunication, transmits the controller through the signal cable, and the software of controller is handled the signal of telecommunication. And the interface circuit of the controller is electrically connected with the ADCP, the single-point current meter and the interface circuit of the hydrophone through signal cables, acquires data of the hydrophone, and performs data processing through the controller so as to start or close the active sounding instrument to work.

One end of the release cable is connected with the acoustic releaser, and the other end of the release cable penetrates through a hole of the partition plate to be connected with the gravity anchor; the lower box body is provided with a floating ball which is fixedly connected to the partition plate through a second bolt.

The intelligent seabed base is characterized in that the upper box body is in an eight-edge frustum shape with eight side faces, the eight side faces are respectively provided with a circular truncated cone type sound wave guide port, and included angles between the side faces of different upper box bodies and a vertical plane correspond to different detection ranges, so that the detection range is at least larger than the sound production range; furthermore, wedge-shaped gaskets with different slopes are arranged between the flange of the sound wave guide port and the counter bore of the upper box body and used for adjusting the installation angle of the circular truncated cone-shaped sound wave guide port, so that the detection range of the hydrophone is adjusted, and at least the detection range is larger than the sound production range.

The intelligent seabed base, still including preventing trawl box lid and swing support, prevent trawl box lid through bolt a fixed connection on the seabed base box, prevent that trawl box lid is provided with wave guide, ADCP and single-point current meter and wave guide fixed connection are on swing support, swing support is fixed again and is prevented trawl box lid, the wave guide tip is towards the transducer of acoustics releaser.

The intelligent seabed base is characterized in that a sand prevention net is arranged in a gap between the circular truncated cone type sound wave guide port, the waveguide tube, the ADCP, the single-point current meter and the seabed base box body.

The intelligent seabed base is characterized in that the non-active sounding instrument is an acoustic releaser, a hydrophone, a CTD (computer to digital converter), a nitrate measuring instrument, a dissolved oxygen recorder and a temperature recorder, a hydroacoustic signal is not sent when the instrument works, the acoustic releaser is in a dormant state after being arranged, does not actively sound before being awakened by a password, and sends the hydroacoustic signal to exchange information with a mother ship after being awakened by the password, so that the seabed base is immediately recovered by an arranger on the mother ship, and the problem of exposure does not exist.

The intelligent seabed base is preferably characterized in that the lower box body, the upper box body and the partition plate are made of glass fiber reinforced plastics.

The intelligent seabed base is characterized in that the controller further comprises a central processing unit, an internal memory, an external memory, an interface circuit, a power supply and a water-tight pressure-resistant casing, wherein the central processing unit is respectively connected with the internal memory, the external memory and the interface circuit by using a printed circuit board, and the central processing unit, the internal memory, the external memory and the interface circuit are respectively connected with the power supply; the external memory refers to an external memory, and preferably the high-speed solid state disk is the external memory; the data of the controller is stored in an external memory, and the controller controls the ADCP and the single-point current meter to work or stop working and adjust working parameters of the ADCP and the single-point current meter by running a program stored in the external memory in the internal memory.

The intelligent seabed base is characterized in that the program of the controller further comprises a main program module, a data acquisition module, a data processing module, an anti-exposure module and a parameter setting module; after the controller finishes hardware self-checking, starting an operating system and running a main program module; the main program module is used for calling the data acquisition module, starting the inactive sounding instrument to work, and collecting and storing the data of the inactive sounding instrument in the external memory; the data processing module is used for inquiring the underwater sound data of the distribution environment collected by the hydrophone, converting the underwater sound time domain signal into a frequency domain signal, and solving the maximum value Pmax of the power amplitude of the underwater sound signal in the low frequency range of 0-50 Hz; the exposure prevention module is used for judging the result of the data processing module so as to start or close the active sounding instrument to work: if Pmax is P0, namely the maximum value of the power amplitude of the low-frequency underwater sound signal is smaller than the power amplitude threshold value, the controller starts the active sound production instrument to work; collecting and storing data of the active sounding instrument in an external memory; if the ship is not found to be close to the sounding instrument, the active sounding instrument is started to work normally; if Pmax is greater than P0, namely the maximum value of the power amplitude of the low-frequency underwater sound signal is greater than the power amplitude threshold value, the controller closes the active sounding instrument until Pmax is less than P0; when the ship is found to be close to the ship, the controller stops the active sounding instrument from working, and restarts the work of the active sounding instrument after the ship is far away; the parameter setting module is used for analyzing ADCP data to reset parameters of the ADCP data, and particularly resetting the sampling frequency of the ADCP according to the magnitude delta V of the flow rate change; analyzing the CTD data to reset the instrument parameters, in particular resetting the CDT temperature sampling frequency of the instrument according to the temperature change delta T, resetting the salinity sampling frequency according to the salinity change delta S, and resetting the depth sampling frequency according to the depth change delta D.

Meanwhile, the invention also provides a control method of the intelligent seabed base, which comprises the following steps:

1) before the intelligent seabed foundation enters water, manually opening a controller, starting a program and initializing the controller;

2) the controller starts the non-active sounding instrument to work;

3) inquiring hydrophone data, converting the underwater sound time domain signal into an underwater sound frequency domain signal, and solving the maximum value Pmax of the power amplitude in a low frequency range of 0-50 Hz;

4) if Pmax < ═ P0, the maximum value of the power amplitude is smaller than the power amplitude threshold value, namely the seabed base controller determines that: the low-frequency underwater acoustic signal has little difference with the environmental noise, and an active sound producing instrument is started to work; if Pmax > P0, the seabed base controller determines that: the maximum value of the power amplitude of the low-frequency underwater sound signal is larger than a power amplitude threshold value, and the active sound production instrument stops working until Pmax < ═ P0;

5) the controller analyzes the seawater flow speed data measured by the ADCP, and resets the sampling frequency of the ADCP according to the magnitude delta V of the flow speed change;

6) the controller analyzes seawater temperature and salinity depth data measured by the CTD, resets the CDT temperature sampling frequency of the instrument according to the temperature change delta T, resets the salinity sampling frequency according to the salinity change delta S, and resets the depth sampling frequency according to the depth change delta D;

7) after the intelligent seabed base goes out of water, the controller is manually closed.

The beneficial technical effects of the invention are as follows:

1. the sectional area of the circular truncated cone type sound wave guide port is gradually reduced, so that underwater sound signals can be enhanced; the eight side surfaces are respectively provided with a circular truncated cone type sound wave guide port which points to eight areas on the sea surface, and the detection range of the hydrophone is enlarged.

2. The seabed-based controller uses hydrophones to sense the environment in order to confirm safety to activate or deactivate active acoustic instrumentation. Thus, the sound-emitting exposure can be prevented from being damaged intentionally or unintentionally when the sound-emitting exposure is unsafe, and loss caused by exposure is reduced.

3. The controller analyzes the seawater flow velocity data measured by the ADCP, resets the sampling frequency of the ADCP according to the magnitude delta V of the flow velocity change, and properly reduces the sampling frequency to save the maintenance cost of the seabed base;

4. the controller analyzes seawater temperature and salinity depth data measured by the CTD, resets the CDT temperature sampling frequency of the instrument according to the temperature change delta T, resets the salinity sampling frequency according to the salinity change delta S, resets the depth sampling frequency according to the depth change delta D, and properly reduces the sampling frequency to save the maintenance cost of the seabed foundation.

Drawings

FIG. 1 is a schematic diagram of an intelligent seabed-based structure of the present invention;

FIG. 2 is a schematic diagram of the detection range of a hydrophone;

FIG. 3 is a schematic cross-sectional view of a detection range of a hydrophone;

FIG. 4 is a schematic diagram of a power spectrum of an underwater acoustic signal acquired by a hydrophone;

in the group: a circular truncated cone type acoustic guide port 101, an acoustic guide tube 102, an anti-trawl box cover 103, a bolt I104, a waveguide 105, an acoustic releaser 106, an ADCP107, a single-point current meter 108, a controller 109, a floating ball 110, a bolt II 111, a signal cable 112, a hydrophone 113, a release cable 114, a connecting ring 115, a concrete block 116, a reinforcing bar 117, a barb 118, a hanging ring 119, a defense cable 120, a hard seabed 121, a soft seabed 122, a gravity anchor 123, a lower box 124, a partition 125, an upper box 126, a seabed base box 127 and seawater 128;

detection range 201, sounding range 202, waveguide port two 203, waveguide port one 204, sound wave indication line 205, ship 206.

Detailed Description

The invention will be further described with reference to the following detailed description and drawings:

as shown in fig. 1 and 2, the intelligent seabed base comprises a seabed base box 127, a gravity anchor 123, a release cable 114, a partition 125, a controller 109, a trawl prevention box cover 103 and a swing bracket, wherein one end of the release cable 114 is connected with an acoustic releaser 106, the other end of the release cable is connected with the gravity anchor 123, the acoustic releaser 106 is arranged on the partition 125, the acoustic releaser 106 receives an instruction of a deck unit to release the release cable 114, and the seabed base box 127 is separated from the release cable 114 and the gravity anchor 123 and floats to the sea surface for recovery. The seabed-based box 127 is divided into a lower box 124 and an upper box 126 by the partition 125, the upper box 126 is provided with an active sound-producing instrument and an inactive sound-producing instrument, the active sound-producing instrument at least comprises an ADCP107 and a single-point current meter 108, and the instruments except the active sound-producing instrument are inactive sound-producing instruments. The lower box 124 is octagonal; the upper box body 126 is in an eight-prism shape with eight side surfaces, the eight side surfaces are respectively provided with a circular truncated cone-shaped acoustic waveguide port 101 and point to eight areas of the sea surface, the sectional area of the circular truncated cone-shaped acoustic waveguide port 101 is gradually reduced, the large end of the circular truncated cone-shaped acoustic waveguide port 101 points to the sea surface in an inclined mode, the small end of the circular truncated cone-shaped acoustic waveguide port 101 is connected with an acoustic waveguide 102, the eight acoustic waveguides 102 are intersected at a transducer of a hydrophone 113 to guide acoustic signals generated by ships 206 in the eight areas to be transmitted to the transducer of the hydrophone 113, the acoustic signals are converted into electric signals by the transducer and transmitted to the controller 109 through a signal cable 112, and software of the controller 109 processes the electric;

interface circuits of the controller 109 are electrically connected to interface circuits of the ADCP107, the single-point current meter 108 and the hydrophone 113 through signal cables 112, collect data of the hydrophone 113, perform data processing of the controller 109,

if Pmax < ═ P0, namely the maximum value of the power amplitude of the low-frequency underwater sound signal is smaller than the power amplitude threshold value, the controller 109 starts the active sound production instrument to work;

if Pmax is greater than P0, namely the maximum value of the power amplitude of the low-frequency underwater sound signal is greater than the power amplitude threshold value, the controller 109 closes the active sounding apparatus until Pmax is less than P0, and the active sounding apparatus is restarted.

The lower box 124 is provided with a floating ball 110, and the floating ball 110 is fixedly connected to the partition 125 through a second bolt 111. Anti-trawl box cover 103 is provided with waveguide 105, ADCP107 and single point current meter 108, ADCP107, single point current meter 108 and waveguide being fixedly attached to a swing bracket (not shown) which is in turn fixed to anti-trawl box cover 103, with the small end of waveguide 105 facing the transducer of acoustic release 106. The anti-trawl box cover 103 is fixedly attached to the seabed base box 127 using bolt one 104. The sand control net is arranged at the gap between the truncated cone type acoustic guide port 101, the waveguide 105, the ADCP107, the single-point current meter 108 and the seabed base box 127. After deployment, the lower box 124 is located in the soft seabed 122; the upper tank 126 is located in the sea water 128; the gravity anchor 123 is composed of a concrete block 116, a reinforcing steel bar 117, a barb 118, a lifting ring 119 and a connecting ring 115; the connecting ring 115 is fixedly connected with the release cable 114, and the left hoisting ring 119 and the right hoisting ring 119 are connected with the deployment cable 120; the gravity anchor 123 is located above the hard sea bed 121 and in the soft sea bed 122. More instruments such as CTD, nitrate meter, dissolved oxygen recorder and temperature recorder may be provided on the upper housing 126 as needed for observation. In the following description, the instruments carried on the seabed base are divided into active sounding instruments and inactive sounding instruments, the active sounding instruments such as ADCP107 and single-point current meter 108 send out underwater sound signals to measure echo waves to measure flow rate, the inactive sounding instruments such as hydrophone, CTD, nitrate measuring instruments, dissolved oxygen recorder and temperature recorder, the instruments do not send out underwater sound signals when working, acoustic releaser 106 is laid and put back, and is in a dormant state, and the instruments do not actively sound before being awakened by a password, and after being awakened by the password, send out underwater sound signals and mother ship exchange information, the seabed base is immediately recovered by the laying person on the mother ship, and the problem of exposure does not exist, and the acoustic releaser is also classified as an inactive sounding instrument.

The lower box body 124, the upper box body 126 and the partition plate 125 are made of glass fiber reinforced plastic, eight side surfaces of the upper box body 126 are respectively provided with a truncated cone-shaped sound wave guide port 101 which points to eight areas of the sea surface, the sectional area of the truncated cone-shaped sound wave guide port 101 is gradually reduced, the large end of the truncated cone-shaped sound wave guide port 101 points to the sea surface in an inclined mode, the small end of the truncated cone-shaped sound wave guide port 101 is connected with a sound wave guide pipe 102, the eight sound wave guide pipes 102 are intersected at a transducer of the hydrophone 113, sound signals generated by the ship 206 in the eight areas are guided to be transmitted to the transducer of the hydrophone 113, and the technical effect of' hearing in eight directions by. The first waveguide port 204 receives an underwater sound signal sent by a ship entering the east area, the second waveguide port 203 receives an underwater sound signal sent by a ship entering the northeast area, the third waveguide port 204 receives an underwater sound signal sent by a ship entering the northeast area, and the like. The acoustic signals from the ship are transmitted through the acoustic waveguide 102 to the hydrophone 113, the transducer of the hydrophone 113 converts the acoustic signals into electrical signals, which are transmitted to the controller 109 via the signal cable 112, and the software of the controller 109 processes the acoustic signals.

The intelligent seabed base is characterized in that the upper box body 126 is in an eight-edge frustum shape with eight side faces, the eight side faces are respectively provided with a circular truncated cone type sound wave guide port 101, an included angle between the side face of the upper box body 126 and a vertical plane is represented by beta, different beta angles are selected to correspond to different detection ranges 201, and at least the detection range 201 is larger than the sound production range 202. Further, wedge-shaped spacers (not shown) with different slopes are disposed between the flange of the acoustic waveguide 101 and the counter bore of the upper case 126 to adjust the installation angle of the truncated cone-shaped acoustic waveguide 101, and the detection range 201 of the hydrophone 113 is adjusted by adjusting the installation angle of the truncated cone-shaped acoustic waveguide 101, at least until the detection range 201 is greater than the sound emission range 202. I.e. R is greater than R in fig. 2. The sounding range 202 refers to a range that sound waves of the active sounding instrument directly reach, sound pulses sent by the active sounding instrument are reflected by the sea surface, and the direction and the size of the reflected sound pulses are constantly changed and gradually weakened due to the fact that the sea waves fluctuate, and the reflected sound pulses are submerged in environmental noise.

The controller 109 comprises a central processing unit, an internal memory, an external memory, an interface circuit, a power supply and a water-tight pressure-resistant casing, wherein the central processing unit is respectively connected with the internal memory, the external memory and the interface circuit by using a printed circuit board, and the central processing unit, the internal memory, the external memory and the interface circuit are respectively connected with the power supply; the external memory refers to an external memory, and preferably the high-speed solid state disk is the external memory; interface circuit of controller 109 is electrically connected to interface circuits of ADCP107, single-point current meter 108 and hydrophone 113 through signal cable 112, and collects data of ADCP107, single-point current meter 108 and hydrophone 113, and stores the data in external memory. Controller 109 controls ADCP107, single point current meter 108 to operate or stop and adjust their operating parameters by running a program stored in external memory in memory.

The program of the controller 109 comprises a main program module, a data acquisition module, a data processing module, an anti-exposure module and a parameter setting module, and firstly, after the controller 109 completes the hardware self-check, an operating system is started and the main program module is operated; the main program module calls the data acquisition module to start the non-active sounding instrument to work, and data of the non-active sounding instrument is collected and stored in the high-speed solid state disk. Secondly, the data processing module queries the acoustic data of the deployment environment collected by the hydrophone, converts the acoustic time domain signal into a frequency domain signal, and calculates the maximum value Pmax of the power amplitude of the acoustic signal in a low frequency range of 0 to 50Hz, as shown in fig. 4. Thirdly, if Pmax < ═ P0(P0 is the power amplitude threshold of the underwater sound signal) according to the result of the data processing module, namely the maximum value of the power amplitude of the low-frequency underwater sound signal is smaller than the power amplitude threshold, the controller 109 starts the active sound-producing instrument to work; collecting and storing data of the active sounding instrument in a high-speed solid state disk; and if the ship is not found to be close to the sounding instrument, the active sounding instrument is started to work normally. If Pmax > P0, namely the maximum value of the power amplitude of the low-frequency underwater sound signal is larger than the power amplitude threshold value, the controller 109 closes the active sounding instrument until Pmax < ═ P0; when the ship is found to be close to the ship, the controller 109 stops the active sounding instrument and restarts the work of the active sounding instrument after the ship is far away; therefore, the seabed base is not suitable for being arranged on an airway and nearby, due to the fact that ships come and go, underwater noise changes frequently, observation of the seabed base active sounding instrument can be stopped for a long time, data are lost too much, and the defense arrangement area of the intelligent seabed base is selected in an area far away from the airway. Fourthly, the parameter setting module analyzes the ADCP data to reset the parameters of the ADCP data, and particularly resets the sampling frequency of the ADCP according to the magnitude delta V of the flow rate change; analyzing CTD data to reset instrument parameters, particularly resetting the CDT temperature sampling frequency of the instrument according to the temperature change delta T, resetting the salinity sampling frequency according to the salinity change delta S, and resetting the depth sampling frequency according to the depth change delta D; the measuring value sets up higher sampling frequency when changing greatly, surveys ocean key element change process in detail, when the measuring value changes for a short time, sets up lower sampling frequency, wait to observe the marine phenomenon appearance with extremely low electric quantity consumption, the maintenance cycle of extension instrument, save the observation expense, the invalid data when having solved a large amount of calms and calms in the calm wind that contains in the data of current instrument observation, when discovering useful observation, the resolution ratio of data is too low problem again.

The control method of the intelligent seabed base comprises the following steps:

1) before the intelligent seabed foundation enters water, the controller 109 is manually opened, the program is started, and the controller 109 is initialized;

2) the controller 109 starts the inactive sounding instrument to work;

3) querying hydrophone data (for example, collecting an underwater sound signal generated by the ship 206), converting the underwater sound time domain signal into an underwater sound frequency domain signal, and solving a maximum value Pmax of the power amplitude in a low frequency band of 0 to 50Hz, as shown in fig. 4;

4) if Pmax < ═ P0, the maximum power amplitude is less than the power amplitude threshold, i.e. the seabed base controller 109 determines that: the low-frequency underwater acoustic signal has little difference with the environmental noise, and an active sound producing instrument is started to work; if Pmax > P0, the seabed base controller 109 determines that: when the maximum value of the power amplitude of the low-frequency underwater acoustic signal is larger than the power amplitude threshold value, the wheeled ship is about to enter the sounding range 202, and the active sounding instrument stops working until Pmax < ═ P0;

5) the controller 109 analyzes the seawater flow velocity data measured by the ADCP, the sampling frequency of the ADCP is reset according to the magnitude delta V of the flow velocity change, the electric quantity of each instrument is limited, the ocean element change process observed by the high sampling frequency is clear, and the consumed electric quantity is large; the change process of the ocean elements observed with low sampling frequency is fuzzy, the consumed electric quantity is small, the sampling frequency determines the service time of the instrument subjected to one-time maintenance, and the sampling frequency is properly reduced to save the maintenance cost of the seabed base;

6) the controller 109 analyzes the seawater temperature and salinity depth data measured by the CTD, resets the CDT temperature sampling frequency of the apparatus according to the temperature change delta T, resets the salinity sampling frequency according to the salinity change delta S, and resets the depth sampling frequency according to the depth change delta D;

7) after the smart seabed base is drained, the controller 109 is manually turned off.

The technical contents not mentioned in the above modes can be realized by adopting or referring to the prior art. It is intended that any equivalents, or obvious modifications, which may be made by those skilled in the art in light of the teachings herein, be within the scope of the present invention.

Claims

1. The utility model provides an intelligence seabed base, its includes seabed base box (127), gravity anchor (123), release cable (114), controller (109), acoustic releaser (106) is connected to release cable (114) one end, and the other end is connected gravity anchor (123), seabed base box (127) are provided with initiative vocal apparatus and non-initiative vocal apparatus, and initiative vocal apparatus includes ADCP (107) and single-point current meter (108) at least, and the instrument except that initiative vocal apparatus is non-initiative vocal apparatus, its characterized in that:

the seabed base also comprises a partition plate (125), the seabed base box body (127) is divided into a lower box body (124) and an upper box body (126) by the partition plate (125), the acoustic releaser (106) is arranged on the partition plate (125), and the active sounding apparatus and the inactive sounding apparatus are arranged on the upper box body (126); the lower box body (124) is in an octagonal prism shape; the upper box body (126) is in an eight-edge frustum shape with eight side faces, the eight side faces are respectively provided with a circular truncated cone type sound wave guide port (101) and point to eight areas of the sea surface, the sectional area of the circular truncated cone type sound wave guide port (101) is gradually reduced, the large end of the circular truncated cone type sound wave guide port (101) points to the sea surface in an inclined mode, the small end of the circular truncated cone type sound wave guide port is connected with a sound wave guide pipe (102), the eight sound wave guide pipes (102) are intersected at a transducer of a hydrophone (113) to guide underwater sound signals generated by ships (206) in the eight areas to be transmitted to the transducer of the hydrophone (113), the transducer converts the underwater sound signals into electric signals, the electric signals are transmitted to the controller (109) through a signal cable (112), and software of the controller;

and an interface circuit of the controller (109) is electrically connected with the ADCP (107), the single-point current meter (108) and the interface circuit of the hydrophone (113) through a signal cable (112), data of the hydrophone (113) is acquired, and the data of the hydrophone (113) is processed by the controller (109) so as to start or stop the active sounding instrument to work.

2. The intelligent seabed base of claim 1, wherein: the included angles between the side surfaces of the different upper box bodies (126) and the vertical plane correspond to different detection ranges (201), and at least the detection range (201) is larger than the sounding range (202); wedge-shaped gaskets with different slopes are arranged between the flange of the sound guide port (101) and the counter bore of the upper box body (126) and used for adjusting the installation angle of the truncated cone-shaped sound guide port (101), so that the detection range (201) of the hydrophone (113) is adjusted, and at least the detection range (201) is larger than the sound production range (202).

3. The intelligent seabed base of claim 1, wherein: still including preventing trawl box lid (103) and swing support, prevent trawl box lid (103) through bolt (104) fixed connection on seabed base box (127), prevent trawl box lid (103) and be provided with waveguide (105), ADCP (107) and single-point current meter (108), ADCP (107), single-point current meter (108) and waveguide (105) fixed connection are on swing support, swing support is fixed again on preventing trawl box lid (103), waveguide (105) tip is towards the transducer of acoustics releaser (106).

4. The intelligent seabed base of claim 1, wherein: one end of the release cable (114) is connected with the acoustic releaser (106), and the other end of the release cable passes through a hole of the clapboard (125) to be connected with the gravity anchor (123); the lower box body (124) is provided with a floating ball (110), and the floating ball (110) is fixedly connected to the partition plate (125) through a second bolt (111).

5. The intelligent seabed base of claim 1, wherein: and a sand control net is arranged at the gap between the truncated cone type sound wave guide port (101), the waveguide tube (105), the ADCP (107), the single-point current meter (108) and the seabed base box body (127).

6. The intelligent seabed base of claim 1, wherein: the non-active sounding instruments are the acoustic releaser 106, the hydrophone 113, the CTD, the nitrate measuring instrument, the dissolved oxygen recorder and the temperature recorder, when the instruments work, no underwater sound signal is sent, after the acoustic releaser is distributed, the instruments are in a dormant state, the instruments do not sound actively before being awakened by the password, after being awakened by the password, the instruments send the underwater sound signal to exchange information with the mother ship, the seabed base is immediately recovered by a distributor on the mother ship, and the problem of exposure does not exist.

7. The intelligent seabed base of claim 1, wherein: the lower box body (124), the upper box body (126) and the partition plate (125) are made of glass fiber reinforced plastics.

8. The intelligent seabed base of claim 1, wherein: the controller (109) comprises a central processing unit, an internal memory, an external memory, an interface circuit, a power supply and a water-tight pressure-resistant shell, wherein the central processing unit is respectively connected with the internal memory, the external memory and the interface circuit by using a printed circuit board, and the central processing unit, the internal memory, the external memory and the interface circuit are respectively connected with the power supply; the controller (109) controls the ADCP (107) and the single point current meter (108) to operate or stop and adjust their operating parameters by operating a program stored in an external memory in the internal memory.

9. The intelligent seabed base of claim 8, wherein: the program of the controller (109) comprises a main program module, a data acquisition module, a data processing module, an anti-exposure module and a parameter setting module; the main program module is used for calling the data acquisition module, starting the inactive sounding instrument to work, and collecting and storing data of the inactive sounding instrument in the external memory; the data processing module is used for inquiring the underwater sound data of the distribution environment collected by the hydrophone, converting the underwater sound time domain signal into a frequency domain signal, and solving the maximum value Pmax of the power amplitude of the underwater sound signal in the low frequency range of 0-50 Hz; the anti-exposure module is used for starting or closing the active sounding instrument to work according to the result of the data processing module: if Pmax < ═ P0, namely the maximum value of the power amplitude of the low-frequency underwater sound signal is smaller than the power amplitude threshold value, the controller (109) starts the active sound production instrument to work; the data acquisition module is used for collecting and storing data of the active sounding instrument in the external memory; if Pmax > P0, namely the maximum value of the power amplitude of the low-frequency underwater sound signal is larger than the power amplitude threshold value, the controller (109) closes the active sounding instrument until Pmax < ═ P0; the parameter setting module is used for analyzing ADCP data to reset parameters of the ADCP data, and resetting the sampling frequency of the ADCP according to the magnitude delta V of the flow rate change; analyzing the CTD data to reset the instrument parameters, and resetting the CDT temperature sampling frequency of the instrument according to the temperature change delta T; resetting salinity sampling frequency according to the salinity change delta S; the depth sampling frequency is reset according to the magnitude of the depth change Δ D.

10. The intelligent seabed-based control method as claimed in any one of claims 1 to 9, comprising the steps of:

1) before the seabed foundation enters water, manually turning on the controller (109), starting a program, and initializing the controller (109);

2) the controller (109) starts the non-active sounding instrument to work;

4) if Pmax < ═ P0, the maximum power amplitude is less than the power amplitude threshold, then the controller (109) determines that: the low-frequency underwater acoustic signal has little difference with the environmental noise, and an active sound producing instrument is started to work; if Pmax > P0, the controller (109) determines that: the maximum value of the power amplitude of the low-frequency underwater sound signal is larger than a power amplitude threshold value, and the active sound production instrument stops working until Pmax < ═ P0;

5) the controller (109) analyzes the seawater flow rate data measured by the ADCP, and resets the sampling frequency of the ADCP according to the magnitude delta V of the flow rate change;

6) the controller (109) analyzes seawater temperature and salinity depth data measured by the CTD, resets the CDT temperature sampling frequency of the instrument according to the temperature change delta T, resets the salinity sampling frequency according to the salinity change delta S, and resets the depth sampling frequency according to the depth change delta D;

7) after the seabed base is drained, the controller (109) is manually turned off.