CN112596060A - Ocean in-situ three-dimensional monitoring system - Google Patents
Ocean in-situ three-dimensional monitoring system Download PDFInfo
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- CN112596060A CN112596060A CN202011242812.9A CN202011242812A CN112596060A CN 112596060 A CN112596060 A CN 112596060A CN 202011242812 A CN202011242812 A CN 202011242812A CN 112596060 A CN112596060 A CN 112596060A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 19
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 19
- 238000012806 monitoring device Methods 0.000 claims description 16
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 14
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Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/50—Systems of measurement, based on relative movement of the target
- G01S15/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B22/00—Buoys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B22/00—Buoys
- B63B22/04—Fixations or other anchoring arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/004—Specially adapted to detect a particular component for CO, CO2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/0047—Specially adapted to detect a particular component for organic compounds
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/539—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B22/00—Buoys
- B63B2022/006—Buoys specially adapted for measuring or watch purposes
Abstract
The invention relates to an ocean in-situ three-dimensional monitoring system which is characterized by comprising a buoy, a first composite cable, a main floating body, a second composite cable, a seabed connection box and a power supply, wherein the power supply is arranged in the buoy, the buoy is positioned on the surface of seawater, first monitoring equipment is arranged in the buoy, the buoy is connected with the main floating body through the first composite cable, the main floating body is positioned at a position away from the sea surface by a preset depth, a balancing weight and a buoyancy block are arranged on the first composite cable, so that the first composite cable forms a bent shape at least comprising a first inflection point and a second inflection point, the main floating body is connected with the seabed connection box through the second composite cable, second monitoring equipment is arranged on the main floating body, third monitoring equipment is arranged on the seabed connection box, the seabed connection box is fixedly arranged on the surface of the seabed, and the power supply is used for supplying power. The invention gives consideration to the timeliness and the accuracy of the acquired data, can acquire related monitoring data without equipment recovery, and greatly improves the reliability in the aspect of wind wave and current resistance.
Description
Technical Field
The invention relates to the technical field of ocean monitoring, in particular to an ocean in-situ three-dimensional monitoring system.
Background
The hydrate is one of novel clean energy sources which have potential to replace coal, petroleum and natural gas in the future, and is also a new energy source which is not developed in large quantity and has huge reserves so far. Hydrate element information is contained in seawater water body and gas information of the seabed natural gas hydrate target point, and the data change can reflect the change element of the hydrate forming environment. The conditions of different space-time scales of the hydrate submarine environment elements and the variation trend of the conditions are required to be monitored in an omnibearing and three-dimensional manner; collecting, transmitting, processing and analyzing information data of the submarine natural gas hydrate environmental elements; revealing hydrate subsea environment and environmental changes; and provides in-situ data for in-depth research and exploitation of natural gas hydrates.
The existing natural gas hydrate monitoring methods mainly comprise two methods: (1) the sampling analysis method is to sample the sea water at the sea bottom, and then analyze and test the sample to obtain the content of dissolved methane in the sea water; (2) the self-contained monitoring system is characterized in that natural gas hydrate monitoring equipment is placed at a specific observation position, power is supplied through a storage battery, the natural gas hydrate monitoring equipment is periodically recovered, and relevant measurement parameters are taken out. For the first method, the measurement period is long, and the data timeliness is poor; after sampling the seawater, the environmental parameters (pressure, temperature, illumination, etc.) are changed inevitably, which has a certain influence on the accuracy of the data. For the second method, a self-capacitance power supply mode is needed, but the second method is limited by the performance of an energy storage battery, and the working time is relatively limited; and the data is stored locally, and the data is read once at long intervals, so that the data timeliness is poor. Aiming at the problems of poor data timeliness and limited data accuracy of the traditional sampling analysis method, a monitoring method with good timeliness and accurate data is needed to effectively complete the monitoring of the seabed hydrate.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an ocean in-situ three-dimensional monitoring system which can solve the problems of poor timeliness and insufficient data accuracy in ocean monitoring.
The technical scheme for realizing the purpose of the invention is as follows: an ocean in-situ three-dimensional monitoring system comprises a buoy, a first composite cable, a main floating body, a second composite cable, a seabed connection box and a power supply, wherein the power supply is arranged in the buoy, the buoy is positioned on the surface of seawater, first monitoring equipment is arranged in the buoy and is used for monitoring environmental parameters of the position of the sea surface, the buoy is connected with the main floating body through the first composite cable, the first composite cable is used for realizing data transmission and power transmission between the buoy and the main floating body, the main floating body is positioned at a position away from the sea surface by a preset depth,
the first composite cable is provided with a balancing weight and a buoyancy block so that the first composite cable forms a bending shape at least comprising a first inflection point and a second inflection point, the first inflection point and the second inflection point are higher and lower, the first inflection point is the inflection point nearest to the buoy, the second inflection point is the inflection point nearest to the main floating body, the balancing weight is arranged near the upper part of the first inflection point, the buoyancy block is arranged around the second inflection point,
the main floating body is connected with the seabed connection box through a second composite cable, second monitoring equipment is arranged on the main floating body and is used for monitoring environmental parameters in seawater,
the seabed junction box is provided with third monitoring equipment for monitoring environmental parameters of the seabed, the seabed junction box is fixedly arranged on the surface of the seabed,
the power supply is used for supplying power to the first monitoring device, the second monitoring device and the third monitoring device.
Further, the first monitoring device includes a first ADCP, a first methane sensor, and a first carbon dioxide sensor, the first ADCP being emitted toward the seafloor.
Further, the second monitoring device comprises a second ADCP and a third ADCP, wherein the transmitting direction of the second ADCP is towards the sea surface, and the transmitting direction of the third ADCP is towards the seabed in a reverse direction.
Further, the third monitoring device includes a fourth ADCP, a second methane sensor, and a second carbon dioxide sensor, the fourth ADCP being emitted toward the surface.
Furthermore, a first underwater sound communication machine is further arranged in the buoy, and a second underwater sound communication machine is arranged in the main floating body, so that when the communication between the buoy and the main floating body is interrupted due to the fact that the first composite cable is damaged, data transmission between the buoy and the main floating body is achieved.
Further, a standby power supply is arranged in the seabed junction box and used for supplying power to the second monitoring equipment and the third monitoring equipment when the first composite cable is damaged to cause power interruption between the buoy and the main floating body.
Furthermore, two ends of the first composite cable are respectively connected with the buoy and the main floating body through a submarine cable connection protection device.
Furthermore, two ends of the second composite cable are respectively connected with the main floating body and the seabed connection box through a submarine cable connection protection device.
Further, the weight of the balancing weight is balanced in the following way: (weight of clump in water + weight of sea cable in water between buoy to first inflection point) 10% weight of buoy in air.
Further, the weight of the buoyancy block is counterbalanced in the following manner: the net buoyancy of the buoyancy block in the water is a second inflection point to the weight of the submarine cable in the water at the main floating body, wherein a is a constant.
The invention has the beneficial effects that: the method can effectively aim at the monitoring of the natural gas hydrate, adopts in-situ real-time monitoring, and has great advantage in the timeliness of data acquisition. Compared with the traditional sampling analysis method, the method better keeps the current environmental characteristics of the water sample, and the data is relatively more accurate. Compared with the power supply of a storage battery of a self-contained monitoring system, the invention has longer running time and can obtain related monitoring data without equipment recovery. Compared with an in-situ three-dimensional monitoring system, the submarine cable required by the system is only water depth which is far less than the requirement of the in-situ three-dimensional monitoring system, and the system has great breakthrough in wind, wave and current resistance and system reliability.
The invention realizes the monitoring of the natural gas hydrate, not only aims at the specific seabed, but also can realize the three-dimensional monitoring of the water body for the relevant water-gas exchange interface. The submarine junction box is provided with an expansion interface, and the monitoring range can be expanded under the condition that the system power consumption allows. Meanwhile, the system carries out related redundancy backup on power supply and communication, the reliability is high, and the cost of later salvaging and maintenance is greatly reduced. The method can effectively overcome the defect of the time-space property of the traditional natural gas hydrate monitoring method, makes great breakthrough in the real-time property and continuity of data acquisition, expands the monitoring range to a certain extent, is not limited to a certain observation point any more, and realizes the three-dimensional monitoring of the water area.
Drawings
Figure 1 is a schematic structural view of the present invention,
in the figure, 1-first monitoring equipment, 2-first underwater acoustic communication machine, 3-first submarine cable connection protection device, 4-second submarine cable connection protection device, 5-second monitoring equipment, 6-second underwater acoustic communication machine, 7-third submarine cable connection protection device, 8-fourth submarine cable connection protection device and 9-third monitoring equipment.
Detailed description of the preferred embodiments
The invention will be further described with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1, an ocean in-situ stereo monitoring system includes a buoy, a first composite cable, a main floating body, a second composite cable, a seabed connection box and a power supply. The buoy is positioned on the surface of seawater, and is internally provided with first monitoring equipment 1 consisting of a first underwater acoustic communicator 2, a first ADCP (acoustic Doppler current profiler), a first sensor and the like, wherein the monitoring equipment is mainly used for environmental parameters of the sea surface. The power source is carried in the buoy, the first ADCP transmitting direction faces the sea bottom, and the sensors comprise a first methane sensor and a first carbon dioxide sensor. The first sensor carried by the buoy is used for measuring chemical environmental parameters of the seawater and atmosphere exchange interface in real time, so that real-time monitoring of chemical environmental parameters (such as seawater flux) at the seawater and atmosphere exchange encryption position is realized, and the carried first ADCP is used for realizing sea surface hydrological information monitoring. The power supply is used to power all the equipment of the system, including powering the equipment in the buoy, as well as powering the equipment in the main buoy via the first composite cable, and powering the equipment of the subsea junction box via the second composite cable.
Preferably, the buoy is further provided with a storage battery or a tidal energy and wind-solar complementary power generation system for supplying power to the first underwater acoustic communication machine 2, the first ADCP, the first sensor and other devices, so that long-time power supply can be realized, and the requirement of long-time monitoring can be met.
The buoy is connected with the main buoy through a first composite cable, the armored cable can be selected for the first composite cable, the first composite cable is located below the buoy, and the first composite cable can be generally connected with the lowest end of the buoy so that the first composite cable is located below the buoy. A plurality of balancing weights are fixedly mounted on the first composite cable close to the buoy end, and a plurality of buoyancy blocks are fixedly mounted on the first composite cable close to the main buoy end, so that the first composite cable is in a bent shape at least comprising two inflection points, and the two inflection points are higher and lower, for example, in an S-shaped bent shape. The weight of the clump weight is generally weighted based on the following principle: (weight of clump in water + weight of sea cable in water between buoy to first inflection point) 10% weight of buoy in air. The clump weight and the sea cable between the buoy and the first inflection point provide a vertical downward force to the buoy, so that the buoy reduces disturbance caused by horizontal ocean currents on the sea surface as much as possible. The weight of the buoyancy block is typically counterweighted based on the following principles: the net buoyancy of the buoyancy block in the water is a second inflection point to the weight of the submarine cable in the water at the main buoy, where a is a constant, typically 105-. It is noted that the first inflection point when the weight is weighted means the first inflection point nearest to the float, and the second inflection point means the first inflection point nearest to the main float. The buoyancy that the buoyancy piece provided for the submarine cable between second inflection point to the main body is in the state of atress hardly, finally realizes S type constructional element, increases the buffer space of first compound cable. When the first composite cable is in an S shape, the counterweight block is positioned slightly above the first inflection point (namely, a low inflection point), namely, the counterweight block is closer to the first inflection point and farther from the buoy, and the buoyancy block is positioned nearby the periphery of the second inflection point (namely, a high inflection point), namely, the buoyancy block is closer to the second inflection point and farther from the first inflection point. The first compound cable that forms crooked form has increased the buffer space of first compound cable, can slow down and rock, drift because of the production of buoy effort such as sea surge, and then through the interference of first compound cable to main body, can make main body not also rock and shift (the position changes) because of first compound cable connection buoy for main body almost is in quiescent condition.
Preferably, the buoy is connected with one end of the first composite cable through a first submarine cable connection protection device 3, and the main floating body is connected with the other end of the first composite cable through a second submarine cable connection protection device 4 to protect the first composite cable. Submarine cable connection protection device is including bearing head, universal joint and crooked reinforcement, and the bearing head is arranged in separating cable core and armor steel wire in the first composite cable to make the cable core do not receive the force, the armor steel wire atress, with the protection cable core, the bending degree of universal joint and crooked reinforcement mainly used restriction first composite cable prevents that first composite cable bending degree is too big, with the bending radius who guarantees first composite cable in the allowed range.
Preferably, the main float is arranged at a predetermined depth from the sea surface, typically at a depth below 50 meters from the sea surface. The sea surface is located below 50 meters, the sea water is hardly disturbed by the wind waves, the sea water is calm, and the main floating body can be further improved to be in a static state.
The main floating body is connected with the seabed connection box through a second composite cable, and the second composite cable can be an armored photoelectric composite cable. The main floating body is provided with a second underwater acoustic communication machine 6, a second monitoring device 5 composed of two ADCPs and the like, and a communication device, wherein the transmitting direction of one ADCP faces the sea surface, the transmitting direction of the other ADCP faces the sea bottom in the opposite direction, and the two ADCPs are respectively marked as a second ADCP and a third ADCP. The first underwater acoustic communicator 2 and the second underwater acoustic communicator 6 are used as standby communication devices, and when the communication and the power between the buoy and the main floating body are disconnected due to the fact that the first composite cable is damaged, data transmission between the buoy and the main floating body can be achieved through the first underwater acoustic communicator 2 and the second underwater acoustic communicator 6, and basic operation is guaranteed. The second composite cable is an armored photoelectric composite cable, is used for photoelectric transmission of an underwater long path and is a main channel for signal and energy transmission.
Preferably, both ends of the second composite cable are also connected with the main floating body and the seabed junction box respectively through a submarine cable connection protection device so as to protect the second composite cable. Specifically, one end of the second composite cable is connected with the main floating body through a third submarine cable connection protection device 7, and is connected with the seabed connection box through a fourth submarine cable connection protection device 8.
The seabed connection box is positioned on the seabed surface or is arranged at a preset depth from the main floating body, can be fixedly arranged on the seabed surface by the self weight of the seabed connection box, and can also be arranged on the seabed which is more than 150 meters away from the main floating body, so that the monitoring of deep sea targets (such as hydrates) can be realized. The subsea junction box is loaded with a third monitoring device 9 composed of a subsea backup power supply (i.e., a subsea UPS in the figure), a second sensor, an ADCP, and the like, the ADCP installed on the subsea junction box is recorded as a fourth ADCP, the second sensor also includes a second methane sensor and a second carbon dioxide sensor, and a transmitting direction of the fourth ADCP faces the sea surface. And the underwater standby power supply is used as an auxiliary power supply and used for supplying power to the main floating body and the equipment in the seabed connecting box when the first composite cable is damaged and the power supply cannot supply power to the main floating body and the equipment in the seabed connecting box, so that the continuous monitoring capability and the environment adapting capability of the system are improved. The subsea connection box is equipped with a weight of counterweights, for example 5 tonnes, so that the subsea connection box acts as a subsea base station, cutting off the anchoring system for the entire system. Under the effect of seabed box gravity of plugging into, the second composite cable is in vertical state, and main body receives vertical decurrent action of gravity through the second composite cable, further makes even the buoy can receive the stormy waves and cause to rock, but its atress can't transmit main body once almost to make main body keep almost static state. Through such setting, realize the dynamic and static separation at main body upper and lower both ends, reliable and more stable armored cable is in dynamic environment, and armored optical cable is in static environment, improves the reliability of this system. The ADCP, the methane sensor and the carbon dioxide sensor carried on the seabed junction box are used for monitoring the target (hydrate) environmental parameters in real time.
The communication power supply of the system adopts redundant arrangement, the buoy carries an underwater acoustic communicator, the main floating body carries the underwater acoustic communicator and the power carrier equipment, and the seabed connection box is provided with an underwater UPS and the power carrier equipment so as to deal with special conditions. (1) When the dynamic armored cable is damaged and the armored optical cable is not damaged, the communication and the power between the buoy and the main floating body are disconnected, at the moment, the buoy and the main floating body adopt underwater acoustic communication, and the main floating body and the seabed connection box are powered by an underwater UPS (uninterrupted power supply), so that the basic operation is ensured; (2) when the dynamic armored cable is not damaged and the optical unit in the armored optical cable is damaged, the power between the main floating body and the seabed connection box is normal and the communication between the main floating body and the seabed connection box is abnormal, and at the moment, the normal communication between the main floating body and the seabed connection box is realized by using an electrical signal through power carrier equipment; (3) when the dynamic armored cable and the armored photoelectric composite cable are damaged, the buoy and the seabed connection box can still operate automatically, data of the buoy can be sent to a shore station in real time, the seabed connection box operates through the power supply of the underwater UPS, and the data are stored automatically.
The buoy can communicate with the shore base station by satellite communication, so that the monitored data is finally transmitted to the user.
The method can realize the monitoring of the natural gas hydrate, and the data obtained by in-situ real-time monitoring has great advantages in timeliness, and meanwhile, compared with the traditional sampling analysis method, the method provided by the invention has the advantages that the in-situ monitoring can better keep the current environmental characteristics of the water sample, the data is relatively more accurate, and both timeliness and accuracy of the acquired data are considered. Compared with the power supply of a storage battery of a self-contained monitoring system, the self-contained monitoring system is provided with the power generation unit, has longer running time, and can acquire related data without equipment recovery. Compared with an in-situ three-dimensional monitoring system, the submarine cable required by the system is only water depth which is far less than the requirement of the in-situ three-dimensional monitoring system, and the system has great breakthrough in wind, wave and current resistance and system reliability.
The invention realizes the monitoring of the natural gas hydrate, not only aims at the specific seabed, but also can realize the three-dimensional monitoring of the water body for the relevant water-gas exchange interface. The submarine junction box is provided with an expansion interface, and the monitoring range can be expanded under the condition that the system power consumption allows. Meanwhile, the system carries out related redundancy backup on power supply and communication, the reliability is high, and the cost of later salvaging and maintenance is greatly reduced.
In conclusion, the invention overcomes the defect of the spatiotemporal property of the traditional natural gas hydrate monitoring method, makes great breakthrough on the real-time property and the continuity of data acquisition, expands the monitoring range to a certain extent, is not limited to a certain observation point any more, and realizes the three-dimensional monitoring of the water area.
The embodiments disclosed in this description are only an exemplification of the single-sided characteristics of the invention, and the scope of protection of the invention is not limited to these embodiments, and any other functionally equivalent embodiments fall within the scope of protection of the invention. Various other changes and modifications to the above-described embodiments and concepts will become apparent to those skilled in the art from the above description, and all such changes and modifications are intended to be included within the scope of the present invention as defined in the appended claims.
Claims (10)
1. An ocean in-situ three-dimensional monitoring system is characterized by comprising a buoy, a first composite cable, a main floating body, a second composite cable, a seabed connection box and a power supply, wherein the power supply is arranged in the buoy, the buoy is positioned on the surface of seawater, first monitoring equipment is arranged in the buoy and is used for monitoring environmental parameters of the position of the sea surface, the buoy is connected with the main floating body through the first composite cable and is used for realizing data transmission and power transmission between the buoy and the main floating body, the main floating body is positioned at a preset depth position away from the sea surface,
the first composite cable is provided with a balancing weight and a buoyancy block so that the first composite cable forms a bending shape at least comprising a first inflection point and a second inflection point, the first inflection point and the second inflection point are higher and lower, the first inflection point is the inflection point nearest to the buoy, the second inflection point is the inflection point nearest to the main floating body, the balancing weight is arranged near the upper part of the first inflection point, the buoyancy block is arranged around the second inflection point,
the main floating body is connected with the seabed connection box through a second composite cable, second monitoring equipment is arranged on the main floating body and is used for monitoring environmental parameters in seawater,
the seabed junction box is provided with third monitoring equipment for monitoring environmental parameters of the seabed, the seabed junction box is fixedly arranged on the surface of the seabed,
the power supply is used for supplying power to the first monitoring device, the second monitoring device and the third monitoring device.
2. The ocean in situ stereo monitoring system of claim 1, wherein the first monitoring device comprises a first ADCP, a first methane sensor, and a first carbon dioxide sensor, the ADCP emitting direction being towards the seafloor.
3. The ocean in-situ stereo monitoring system according to claim 1, wherein the second monitoring device comprises a second ADCP and a third ADCP, the second ADCP having a transmitting direction towards the sea surface and the third ADCP having a transmitting direction towards the sea bottom.
4. The in-situ ocean stereoscopic monitoring system of claim 1 wherein the third monitoring device includes a fourth ADCP, a second methane sensor and a second carbon dioxide sensor, the fourth ADCP having a transmitting direction towards the ocean surface.
5. The in-situ marine stereoscopic monitoring system of claim 1, wherein a first underwater acoustic communicator is further disposed in the buoy, and a second underwater acoustic communicator is disposed in the main buoy, so that when the first composite cable is damaged to interrupt communication between the buoy and the main buoy, data transmission between the buoy and the main buoy is realized.
6. The ocean in situ stereo monitoring system according to claim 1, wherein a backup power source is provided within the subsea junction box for providing power to the second monitoring device and the third monitoring device when the first compound cable is damaged causing an interruption of power between the buoy and the main buoy.
7. The ocean in-situ stereo monitoring system according to claim 1, wherein two ends of the first composite cable are respectively connected with the buoy and the main floating body through a submarine cable connection protection device.
8. The marine in-situ stereoscopic monitoring system of claim 1, wherein two ends of the second composite cable are respectively connected with the main floating body and the seabed junction box through a submarine cable connection protection device.
9. The marine in-situ stereoscopic monitoring system of claim 1, wherein the weight of the weight block is weighted in the following manner: (weight of clump in water + weight of sea cable in water between buoy to first inflection point) 10% weight of buoy in air.
10. The marine in-situ stereo monitoring system according to claim 1, wherein the weight of the buoyancy block is weighted in the following manner: the net buoyancy of the buoyancy block in the water is a second inflection point to the weight of the submarine cable in the water at the main floating body, wherein a is a constant.
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