CN115407404B - Self-adaptive ocean mobile acoustic chromatography device - Google Patents
Self-adaptive ocean mobile acoustic chromatography device Download PDFInfo
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- CN115407404B CN115407404B CN202211365343.9A CN202211365343A CN115407404B CN 115407404 B CN115407404 B CN 115407404B CN 202211365343 A CN202211365343 A CN 202211365343A CN 115407404 B CN115407404 B CN 115407404B
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- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/38—Seismology; Seismic or acoustic prospecting or detecting specially adapted for water-covered areas
- G01V1/3843—Deployment of seismic devices, e.g. of streamers
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
The invention discloses a self-adaptive ocean mobile acoustic tomography device, which relates to the technical field of ocean monitoring and comprises a mobile observation station and a fixed observation station, and is characterized in that the mobile observation station comprises a mobile platform and a plurality of mobile observation stations distributed in an observation water area; a plurality of fixed observation stations are distributed in the observation water area in a staggered manner, each fixed observation station comprises a pile body, a first energy component and a first central control cabinet are arranged at the upper part of the pile body, a transmitting transducer and a hydrophone are arranged at the lower part of the pile body, and the upper part of the pile body is exposed out of the water surface; the bottom of the mobile platform is provided with a transmitting transducer, a hydrophone and a CTD sensor; the mobile observation station and the fixed observation station are both provided with a positioning and time service device. The invention solves the problems that the sound ray propagation quality of a fixed point cannot solve the jump effect caused by the seasonal change of the ocean environment, so that the observed ocean current data is not measured and each observation station is not stable enough.
Description
Technical Field
The invention belongs to the technical field of ocean monitoring, and particularly relates to a self-adaptive ocean mobile acoustic chromatographic device.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
Marine acoustic tomography is an important technical means for measuring marine hydrologic information, and utilizes the change of the propagation speed of sound waves in the ocean to invert marine environment parameters including ocean currents, ocean temperatures and the like. Marine acoustic tomography has the following advantages in acquiring marine environmental information:
1) The acoustic wave is transmitted in the sea water, so that the advantage of small loss is achieved, and the large-range marine environment information can be obtained;
2) Based on the acoustic propagation multi-path effect, a three-dimensional structure of the marine environment field can be obtained by using limited acoustic chromatographic nodes;
3) Acoustic chromatography is a non-contact measurement method that can avoid the impact on the marine environment due to instrumentation.
The prior art is like the publication number CN 109900256A, the name is a self-adaptive ocean mobile acoustic chromatography system and method, the system comprises a plurality of water surface mobile platforms distributed on the periphery of an observation sea, three hydrophones are arranged at the bottom of each water surface mobile platform and used for accurately positioning underwater acoustic transducers, each water surface mobile platform is connected with underwater low-frequency and high-frequency acoustic transducers through a dragging cable, the water surface mobile platform is provided with a positioning and timing device, the self-positioning of the water surface mobile platform is realized, the acoustic transducers synchronously emit detection sound waves, the high-frequency acoustic transducers emit high-frequency acoustic signals and are matched with the three hydrophones, so that the accurate positioning of the high-frequency and low-frequency acoustic transducers is realized, the low-frequency acoustic transducers emit medium-low-frequency acoustic signals, and the low-frequency acoustic transducers of other water surface mobile platforms mutually receive the emitted signals, so that the acoustic chromatography observation of ocean hydrologic information is realized. The self-adaptive ocean mobile acoustic chromatography system and the method can remarkably improve the accuracy of ocean hydrologic information measurement.
It should be noted that the foregoing description of the background art is only for the purpose of facilitating a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background section of the present application.
Disclosure of Invention
The invention aims to provide a self-adaptive ocean mobile acoustic tomography device, which solves the problems that the acoustic propagation quality of a fixed point cannot solve the jump effect caused by the seasonal change of the ocean environment, so that the observed ocean current data is not measured and each observation station is not stable enough.
The technical scheme adopted by the invention for achieving the purpose is as follows:
an adaptive ocean mobile acoustic chromatographic device, comprising,
a mobile observation station, a plurality of mobile observation stations arranged in an observation water area, wherein the mobile observation station comprises a mobile platform;
the fixed observation stations are arranged in the observation water area in a staggered mode, the fixed observation stations comprise pile bodies, a first energy component and a first central control cabinet are arranged on the upper portions of the pile bodies, transmitting transducers and hydrophones are arranged on the lower portions of the pile bodies, and the upper portions of the pile bodies are exposed out of the water surface;
the device is characterized in that a transmitting transducer, a hydrophone and a CTD sensor are arranged at the bottom of the mobile platform;
the mobile observation station and the fixed observation station are both provided with a positioning and time service device.
According to the invention, through the design of the whole device, the mobile observation station and the fixed observation station are both provided with the positioning and time service device, the time synchronization and the transmitting/receiving synchronization are realized through the positioning and time service device, the bottom of the mobile platform and the lower part of the fixed observation station are provided with the transmitting transducer, the transmitting transducer and the hydrophone can synchronously transmit and receive sound signals, each observation station can store received data into a built-in industrial personal computer hard disk through an instrument, in addition, intermittently can transmit observed data in the time period back to a server terminal through a network, and the problem of measuring the sea current data due to the fact that the sound line transmission quality of a fixed point cannot solve the season change of the fixed point is solved by analyzing data files of different signal codes transmitted back by different stations to obtain the sound propagation time between each station pair, further obtain the vertical average flow velocity data on each station pair, and then assimilate the flow field under the water surface into a water area high resolution three-dimensional hydrodynamic model by utilizing the technical means of assimilation inversion and the like.
The mobile observation station travels in an observation water area according to a specified route, and can change the route according to the requirement. The fixed observation station is arranged in the observation water area, and the movable observation station is matched with the fixed observation station so as to overcome the layering influence of the water body in the local area in summer, so that the reliable sound ray propagation quality can be ensured, and the accuracy requirement of the expected index can be met; in addition, the mobile observation station can provide more abundant sound ray data during the operation of the sound chromatography observation network, and the accuracy of the observation data is improved. The transmitting transducer and the hydrophone can be used for transmitting and receiving signals between the mobile observation stations, so that the flow rate and the temperature of the water area between the mobile observation stations can be measured through the positions of the mobile observation stations.
The fixed observation stations are arranged in the observation water area in a staggered mode, the fixed observation stations comprise pile bodies, an installation mode of offshore piling is adopted, and the installation mode can integrate the first energy source assembly, the first central control cabinet, the transmitting transducer and the hydrophone on the pile bodies. The first energy component comprises a solar panel and a storage battery pack, and the storage battery is connected with other components through stainless steel cable pipes to provide energy for the other components. The first central control cabinet is used for collecting transmission data and controlling the receiving and transmitting of the transmitting transducer and the hydrophone at the bottom of the pile body. Compared with the prior art, the method can effectively reduce the influence of the observation equipment arranged at sea on activities of other human beings such as fishing boats, namely, the possibility of being damaged by the activities of the fishing boats at sea is avoided or reduced; in addition, compared with the whole measurement area, the sea area occupied by the installation mode of offshore piling is negligible, and the ecological system of the observed water area is not affected basically.
Further, a warning lamp is arranged at the top end of the pile body, and an Ultraviolet (UV) anti-biological adhesion lamp and a thermal salt depth meter are arranged near the transmitting transducer and the hydrophone. The warning lamp is arranged at the top end of the pile body, so that the interference probability of the fishing boat to the fixed observation station at night can be further reduced; in addition, can also dispel nearby seabirds through the scintillation of warning light, prevent the biological damage to the first energy subassembly in top. The UV anti-biological attachment lamp is arranged near the transmitting transducer, so that organisms in the ocean can be prevented from attaching the transmitting transducer and the hydrophone, and further the measurement accuracy of the transmitting transducer and the hydrophone can be improved in the long-time use process. The temperature and salt depth measuring instrument can measure the temperature, the salinity and the depth near the pile body, the temperature, the salinity and the pressure have certain influence on the sound velocity, and then the sound velocity can be corrected, so that the measuring precision is improved.
Furthermore, the height of the upper part of the pile body exposed out of the water surface is near the highest historical tide level, and the underwater buried depth at the bottom of the pile body can be correspondingly adjusted according to geological conditions.
Furthermore, the interconnection of the mobile observation station and the fixed observation station and the communication between the cloud end are realized by adopting G or G networks. The whole device obtains time delay through a computer, and uploads the time delay to the cloud end together with data acquired by peripheral equipment at a certain time interval, and inversion of temperature and flow rate is carried out through an algorithm through a data processing system of the cloud end.
According to an embodiment of the invention, the positioning and timing device is a GPS/Beidou receiving chip. The synchronization and the transmitting/receiving synchronization between the mobile observation station and the fixed observation station are realized by a GPS/Beidou receiving chip, and the signal receiving and transmitting of the synchronization of each station is realized by adopting the excellent time synchronism of PPS signals. The design of the positioning and time synchronization unit of the whole device takes the Beidou/GPS hybrid positioning module as a core, so that the long-time working condition can be met; the positioning precision and the pulse precision output by the PPS port can meet the precision requirement of the system.
According to the embodiment of the invention, the moving platform is a wave glider, the wave glider comprises a payload cabin, a wave glider underwater propeller is arranged below the payload cabin, and the payload cabin is connected with the wave glider underwater propeller through a flexible cable;
the transmitting transducer, the hydrophone and the CTD sensor are arranged on the underwater propeller of the wave glider.
Wave glider can turn wave energy into thrust through the wave glider underwater propulsion ware that the below set up, and then need not extra helping hand and can advance at the surface of water. The moving platform is arranged as the wave glider, so that the wave glider has excellent cruising ability and viability, and can realize real-time measurement of environmental parameters such as sea surface temperature, salinity, flow field, sea surface wind, temperature, humidity, air pressure and the like in a large range and in a long distance. Because the sound velocity gradient received by the surface layer of the water area is greatly influenced by sea surface waves, surface water temperature and the like, and meanwhile, bubbles near the water surface scatter and absorb sound signals greatly to adversely influence the underwater acoustic communication performance, the transmitting transducer, the hydrophone and the CTD sensor are arranged on the underwater propeller of the wave glider, and the measuring precision and the breadth of the transmitting transducer and the hydrophone can be measured; under the action of the underwater propeller of the wave glider, the interference of surrounding aquatic organisms can be reduced, and the measurement accuracy is further improved.
Further, a second energy component, a second central control cabinet, a weather meter and a marker light are arranged on the payload cabin. The marker lamp can prevent the interference probability of the night fishing boat to the fixed observation station; in addition, can also prevent birds to wave glider's interference through the scintillation to avoid the interference to the course, improve the precision of detection. The second energy component comprises a solar panel and a load storage battery, the storage battery is placed in the effective load cabin, and through the design of the solar panel and the load storage battery, on one hand, the power can be supplied to a transmitting transducer, a hydrophone and a CTD sensor on the underwater glide propeller, so that the cruising ability of the mobile measuring station is improved; on the other hand, through the design of the load storage battery, the gravity center of the whole device can be moved downwards more, the mobile observation station is prevented from rollover in the process of traveling along the route, and the stability and the safety of the mobile observation station are improved. The second central control cabinet comprises an antenna and a controller, and as each observation station communicates and transmits information through G or G signals, the signals can be transmitted faster and more stably through the antenna; the controller can control the receiving and transmitting of the transmitting transducer and the hydrophone, and further can control the course of the whole device in real time.
According to the embodiment of the invention, auxiliary floating bodies are arranged on two sides of the payload cabin body, and the auxiliary floating bodies are connected with the payload through connecting rod bodies;
the auxiliary floating body comprises a first floating plate and a second floating plate which are arranged up and down, a plurality of limit columns penetrate through the first floating plate and the second floating plate, floating columns are arranged between the first floating plate and the second floating plate, and the limit columns are distributed around the floating columns.
By arranging auxiliary floating bodies on two sides of the effective load cabin body, the first floating plate and the second floating plate and the floating columns between the first floating plate and the second floating plate provide larger buoyancy, so that the buoyancy of the effective load cabin can be effectively improved, the stability of the mobile observation station in the sailing process in water can be further improved, and the effective load cabin body is prevented from being overturned; in addition, transverse waves and longitudinal waves are generated at the periphery of the effective load cabin in the running process, and the influence of the transverse waves and the longitudinal waves can be effectively eliminated or reduced through the arrangement of the auxiliary floating body and the connecting rod body, so that the stable running of the effective load cabin is further ensured; in addition, the auxiliary floating bodies are arranged on the two sides of the payload cabin body and can buffer when contacting obstacles and the like, so that the anti-collision capability of the mobile observation station is improved.
Further, a third floating plate with a sloping surface is arranged at the front end of the second floating plate. Through the design of the third floating plate, the resistance of the auxiliary floating bodies at two sides is smaller in the advancing process of the wave glider, so that the resistance of the wave glider in the advancing process is reduced, and the whole device can reach a designated position faster.
According to an embodiment of the invention, the connecting rod body comprises a flexible rod body, and a floating block is arranged on the flexible rod body.
The floating blocks are arranged on the flexible rod body, so that the integral buoyancy of the wave glider can be further improved, and the stability of the wave glider sailing on the water surface is further improved; in addition, through the design of the floating blocks, transverse waves and longitudinal waves generated around the wave glider can be further eliminated, so that the influence on the wave glider is eliminated, and the deviation of the wave glider from the course is prevented.
According to the embodiment of the invention, a sliding matrix is coaxially and slidably connected on a pile body, a plurality of auxiliary columns are arranged around the pile body, and a netting is arranged between the auxiliary columns and the sliding matrix;
the axis of the auxiliary cylinder body and the axis of the sliding base body are provided with an included angle.
The pile body is provided with a plurality of auxiliary columns which can form auxiliary supports with the pile body, so that the wind wave resistance effect of the pile body is improved, and the situations that the fixed columns are inclined greatly and the like are avoided; in addition, when water flows through the auxiliary column body and the netting, the netting can cut down the flow velocity of the water flow, so that the flow velocity of the water flow around the pile body can be reduced, and the stability of the bottom of the pile body is improved; in addition, rivers can drive the removal of netting with the contact of netting, drive simultaneously and slide the base member and remove, on the one hand make the netting remove by a proper amount through the displacement of sliding the base member, reduce net deformation or damage, on the other hand supplementary cylinder axis is equipped with the contained angle with the base member axis of sliding and makes the netting be the slope setting, the water volume that the inclined netting can be right amount reinforcing along net inclination direction mobile, and then reduce the flow that fixed cylinder bottom water flowed through, reduce the washing away to fixed cylinder bottom, be favorable to its bottom silt, the stability of stone, can also hold back the stone to fixed cylinder bottom through the netting, realize the reinforcement to fixed cylinder lower part promptly.
Drawings
FIG. 1 is a schematic diagram of a mobile observation station;
FIG. 2 is a schematic diagram of a stationary observation station;
FIG. 3 is a schematic view of an overall device;
FIG. 4 is a schematic diagram of a mobile observation station and a fixed observation station layout;
FIG. 5 is a schematic view of a wave glider according to example 3;
FIG. 6 is another schematic view of the wave glider according to the embodiment 3;
FIG. 7 is a schematic diagram of an auxiliary floating body in example 3;
FIG. 8 is a schematic view of a connecting rod in example 3;
fig. 9 is a schematic diagram of a fixed observation station in embodiment 2.
Reference numerals: the system comprises a mobile observation station 100, a wave glider 110, a payload cabin 111, a wave glider underwater propeller 112, a flexible cable 113, an auxiliary floating body 120, a first floating plate 121, a second floating plate 122, a limiting post 123, a floating post 124, a third floating plate 125, a connecting rod 130, a flexible rod 131, a floating block 132, a second central control cabinet 140, an antenna 141, a marker light 150, a fixed observation station 200, a pile 201, an alarm light 202, a first energy component 210, a solar panel 211, a first central control cabinet 220, a sliding base 230, an auxiliary post 240, a netting 250, a stainless steel cable tube 260, a transmitting transducer 300, 400, a hydrophone and a CTD sensor 500.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the specific embodiments and the attached drawings:
example 1:
as shown in fig. 1, 2, 3, an adaptive marine mobile acoustic tomography apparatus includes,
a mobile observation station 100, a plurality of mobile observation stations 100 disposed in an observation water area, the mobile observation station 100 including a mobile platform;
the fixed observation station 200 is formed by arranging a plurality of fixed observation stations 200 in an observation water area in a staggered manner, wherein the fixed observation station 200 comprises a pile body 201, a first energy component 210 and a first central control cabinet 220 are arranged at the upper part of the pile body 201, a transmitting transducer 300 and a hydrophone 400 are arranged at the lower part of the pile body 201, and the upper part of the pile body 201 is exposed out of the water surface;
the device is characterized in that a transmitting transducer 300, a hydrophone 400 and a CTD sensor 500 are arranged at the bottom of the mobile platform;
both the mobile observation station 100 and the fixed observation station 200 are provided with positioning and timing means.
According to the invention, through the design of the whole device, the mobile observation station 100 and the fixed observation station 200 are both provided with the positioning and time service device, time synchronization and transmitting/receiving synchronization are realized through the positioning and time service device, the bottom of the mobile platform and the lower part of the fixed observation station 200 are provided with the transmitting transducer 300, the transmitting transducer 300 adopts the acoustic signal with the frequency range of 5-10 kHz, so that the pressure on the power amplifier and the transducer can be reduced, and a certain observation resolution can be improved. In addition, the acoustic signals can be synchronously sent and received through the transmitting transducer 300 and the hydrophone 400, the received data can be stored in a built-in industrial personal computer hard disk by each observation station through an instrument, in addition, the data observed in the time period can be intermittently transmitted back to a server terminal through a network, the acoustic propagation time among each station pair is obtained by analyzing data files of different signal codes transmitted back by different stations, further, the vertical average flow velocity data on each station pair is obtained, then the flow field below the water surface is assimilated into a water area high-resolution three-dimensional hydrodynamic model by utilizing technical means such as assimilation inversion and the like, the large-area high-precision three-dimensional flow field information is obtained, and the problem that the jump effect caused by the seasonal change of the marine environment cannot be solved by the acoustic line propagation quality of fixed points, and the defect of observing ocean current data is solved.
The mobile observation station 100 travels along a predetermined route in the observation water area, and can change the route according to the need. With the fixed observation station 200, the movable observation station 100 is arranged in the observation water area, and is matched with the fixed observation station 200, so that the influence of water stratification in a local area in summer is overcome, the reliable sound ray propagation quality can be ensured, and the accuracy requirement of an expected index can be met; in addition, the mobile observation station 100 can provide more abundant sound ray data during the operation of the sound chromatography observation network, and improve the accuracy of the observation data. The transmitting transducer 300 and the hydrophone 400 can also transmit and receive signals between the mobile observation stations 100, and the flow rate and the temperature of the water area between the mobile observation stations 100 can be measured through the positions of the mobile observation stations 100.
The fixed observation stations 200 are staggered in the observation water area, the fixed observation stations 200 comprise pile bodies 201, and the installation mode of offshore piling is adopted, and can integrate the first energy source assembly 210, the first central control cabinet 220, the transmitting transducer 300 and the hydrophone 400 on the pile bodies 201. The first energy source assembly 210 includes a solar panel 211 and a battery pack connected to the other components via stainless steel cable tubes 260 to provide energy to the other components. The central control box is used for collecting transmission data and controlling the receiving and transmitting of the transmitting transducer 300 and the hydrophone 400 at the bottom of the pile body 201. Compared with the prior art, the method can effectively reduce the influence of the observation equipment arranged at sea on activities of other human beings such as fishing boats, namely, the possibility of being damaged by the activities of the fishing boats at sea is avoided or reduced; in addition, compared with the whole measurement area, the sea area occupied by the installation mode of offshore piling is negligible, and the ecological system of the observed water area is not affected basically.
Further, a warning lamp 202 is arranged at the top end of the pile body 201, and a UV anti-biological adhesion lamp, a thermal salt depth meter are arranged near the transmitting transducer 300 and the hydrophone 400. The warning lamp 202 is arranged at the top end of the pile body 201, so that the interference probability of the fishing boat to the fixed observation station 200 at night can be further reduced; in addition, the flashing of the warning light 202 can also repel nearby seabirds, preventing the creature from damaging the top first energy assembly 210. The UV anti-biological attachment lamp is arranged near the transmitting transducer 300, so that organisms in the ocean can be prevented from attaching the transmitting transducer 300 and the hydrophone 400, and further the measurement accuracy of the transmitting transducer 300 and the hydrophone 400 can be improved in the long-time use process. The temperature and salt depth measuring instrument can measure the temperature, the salinity and the depth near the pile body 201, and the temperature, the salinity and the pressure have certain influence on sound velocity, so that the sound velocity can be corrected, and the measuring precision is improved.
Furthermore, the height of the upper part of the pile body 201 exposed out of the water surface should be near the highest historical tide level, and the underwater buried depth at the bottom of the pile body 201 can be correspondingly adjusted according to the geological condition.
Further, the communication between the mobile station 100 and the fixed station 200 and the cloud end is realized by using a 4G or 5G network. The whole device obtains time delay through a computer, and uploads the time delay to the cloud end together with data acquired by peripheral equipment at a certain time interval, and inversion of temperature and flow rate is carried out through an algorithm through a data processing system of the cloud end.
The positioning and time service device is a GPS/Beidou receiving chip. The synchronization and the transmitting/receiving synchronization between the mobile observation station 100 and the fixed observation station 200 are realized by a GPS/Beidou receiving chip, and the signal receiving and transmitting of the synchronization of each station is realized by adopting excellent time synchronism of 1PPS signals. The design of the positioning and time synchronization unit of the whole device takes the Beidou/GPS hybrid positioning module as a core, so that the long-time working condition can be met; the positioning precision and the pulse precision output by the 1PPS port can meet the precision requirement of the system.
As shown in fig. 1 and 3, the moving platform is a wave glider 110, the wave glider 110 comprises a payload cabin 111, a wave glider underwater propeller 112 is arranged under the payload cabin, and the payload cabin 111 is connected with the wave glider underwater propeller 112 through a flexible cable 113;
the transmitting transducer 300, hydrophone 400 and CTD sensor 500 are provided on the wave glider underwater propeller 112.
The wave glider 110 can convert wave energy into thrust through the wave glider underwater propeller 112 provided below, and can travel on the water surface without additional assistance. The wave glider 110 has excellent cruising ability and viability, and can realize real-time measurement of sea surface temperature, salinity, flow field, sea surface wind, temperature, humidity, air pressure and other environmental parameters in a large range and in a long distance. Because the sound velocity gradient received by the surface of the water area is greatly influenced by sea surface waves, surface water temperature and the like, and meanwhile, bubbles near the water surface scatter and absorb sound signals greatly, adverse effects are generated on the underwater sound communication performance, the wave glider underwater propeller 112 of the wave glider 110 is generally arranged at about 4-7 meters under water, and the transmitting transducer 300, the hydrophone 400 and the CTD sensor 500 are arranged on the wave glider underwater propeller 112, so that the measuring precision and the breadth of the transmitting transducer 300 and the hydrophone 400 can be measured; the interference of surrounding aquatic organisms can be reduced under the action of the wave glider underwater propeller 112, and the measurement accuracy is further improved.
Further, a second energy source assembly, a second central control box 140, a weather meter and a marker light 150 are provided on the payload bay 111. The marker light 150 can prevent the possibility of interference of the night fishing vessel to the fixed observation station 200; in addition, the bird can be prevented from interfering with the wave glider 110 by flashing, so that the course interference is avoided, and the detection accuracy is improved. The second energy component comprises a solar panel 160 and a load storage battery, the storage battery is placed in the effective load cabin 111, and through the design of the solar panel 160 and the load storage battery, on one hand, the power can be supplied to the transmitting transducer 300, the hydrophone 400 and the CTD sensor 500 on the underwater glide propeller, so that the cruising ability of the mobile measuring station is improved; on the other hand, through the design of the load storage battery, the gravity center of the whole device can be moved downwards, the mobile observation station 100 is prevented from rollover in the process of traveling along the route, and the stability and the safety of the mobile observation station 100 are improved. The second central control box 140 includes an antenna 141 and a controller, and since each observation station communicates and transmits information through 4G or 5G signals, the signals can be transmitted faster and more stably through the antenna 141; the controller can control the transceiver of the transmitting transducer 300 and the hydrophone 400 and the transmission of signals, so that the heading of the whole device can be controlled in real time.
Example 2:
fig. 9 schematically shows an adaptive marine mobile acoustic chromatography device according to another embodiment of the invention, differing from example 1 in that:
the pile body 201 is coaxially and slidably connected with a sliding base 230, a plurality of auxiliary columns 240 are arranged around the pile body 201, and a netting 250 is arranged between the auxiliary columns 240 and the sliding base 230;
the axis of the auxiliary column 240 is at an angle to the axis of the slip matrix 230.
A plurality of auxiliary columns 240 are arranged around the pile body 201, so that auxiliary supports can be formed with the pile body 201, the wind and wave resistance effect of the pile body 201 is improved, and the situations that the fixed columns are inclined greatly and the like are avoided; in addition, when the water flows through the auxiliary column 240 and the netting 250, the netting 250 can cut down the flow velocity of the water flow, so that the flow velocity of the water flow around the pile body 201 can be reduced, and the stability of the bottom of the pile body 201 is improved; in addition, the contact of rivers and the netting 250 can drive the removal of netting 250, drive simultaneously and slide the base 230 and remove, on the one hand make the netting 250 right amount remove through the displacement of slide the base 230, reduce the deformation or the damage of netting 250, on the other hand auxiliary cylinder 240 axis is equipped with the contained angle with slide the base 230 axis and makes the netting 250 be the slope setting, the water volume that the oblique netting 250 can right amount reinforcing follow the inclined direction of netting 250 and flow, and then reduce the flow that the water of fixed cylinder bottom flowed through, reduce the washing away to fixed cylinder bottom, be favorable to its bottom silt, the stability of stone, can also hold back the stone to fixed cylinder bottom through netting 250, realize the reinforcement to fixed cylinder lower part promptly.
Example 3:
fig. 5, 6, 7, 8 schematically show an adaptive marine mobile acoustic chromatography device according to another embodiment of the invention, differing from example 2 in that:
auxiliary floating bodies 120 are arranged on two sides of the payload cabin 111, and the auxiliary floating bodies 120 are connected with the payload through connecting rod bodies 130;
the auxiliary floating body 120 comprises a first floating plate 121 and a second floating plate 122 which are arranged up and down, a plurality of limiting columns 123 are arranged between the first floating plate 121 and the second floating plate 122 in a penetrating mode, floating columns 124 are arranged between the first floating plate 121 and the second floating plate 122, and the limiting columns 123 are distributed around the floating columns 124.
By arranging the auxiliary floating bodies 120 on two sides of the effective load cabin body 111, the first floating plate 121, the second floating plate 122 and the floating columns 124 between the first floating plate 121 and the second floating plate provide larger buoyancy, so that the buoyancy of the effective load cabin can be effectively improved, the stability of the mobile observation station 100 in the sailing process in water can be further improved, and the effective load cabin body 111 is prevented from overturning; in addition, the periphery of the effective load cabin can generate transverse waves and longitudinal waves in the running process, and the influence of the transverse waves and the longitudinal waves can be effectively eliminated or reduced through the arrangement of the auxiliary floating body 120 and the connecting rod body 130, so that the stable running of the effective load cabin is further ensured; in addition, the auxiliary floating bodies 120 provided at both sides of the payload cabin 111 can also buffer against obstacles and the like, thereby improving the collision avoidance capability of the mobile observation station 100.
Further, a third floating plate 125 having a slope is provided at the front end of the second floating plate 122. Through the design of the third floating plate 125, the resistance of the auxiliary floating bodies 120 at two sides is smaller in the advancing process of the wave glider 110, so that the resistance of the wave glider 110 in advancing is reduced, and the whole device can reach a designated position faster.
As shown in fig. 5, 6 and 8, the connecting rod 130 includes a flexible rod 131, and a floating block 132 is disposed on the flexible rod 131.
The floating blocks 132 are arranged on the flexible rod body 131, so that the overall buoyancy of the wave glider 110 can be further improved, and the stability of the wave glider 110 sailing on the water surface is further improved; in addition, by the design of the floating blocks 132, the transverse wave and the longitudinal wave generated around the wave glider 110 can be further eliminated, so that the influence on the wave glider 110 is eliminated, and the deviation from the heading is prevented.
By design of the whole device, the self-adaptive ocean mobile acoustic chromatographic device has unique and remarkable advantages compared with traditional flow measurement schemes such as fixed point, horizontal or navigation ADCP. Aiming at the sea area of the bay area to be measured, the observation resolution of the horizontal direction not higher than 4km is achieved through the arrangement of the self-adaptive ocean mobile acoustic chromatographic device, and if the same horizontal resolution level is achieved, a fixed point ADCP observation system with the power of at least 1.5 times is required to be arranged in the traditional mode. Meanwhile, by utilizing the characteristics of a large number of islands in a bay area to be detected and uniform spatial distribution, the station positions of the self-adaptive ocean mobile acoustic chromatographic device can be distributed around different islands in the bay area, and observation points do not need to be arranged in areas with busy shipping such as a channel, so that the self-adaptive ocean mobile acoustic chromatographic device has the advantage of being not influenced by shipping. Compared with the horizontal ADCP observation distance which is only about 200 m, the invention is more suitable for the observation of narrower river channels, ports and the like, can reach the observation distance which is higher than one order of magnitude, and has obvious technical advantages in the aspects of the observation range and the distance. Compared with the navigation ADCP, the method has the advantage of long-term continuous synchronous observation. In addition, the invention can maintain good sound signal propagation quality under the environment with strong influence of ocean turbulence, which further ensures the operation capability of the technology under extreme sea conditions and provides ocean current data guarantee for related works such as ocean disaster prevention and reduction.
Example 4:
when the underwater acoustic signal receiving device is used, the fact that the signal is easy to be subjected to multiple interference in underwater propagation is considered, noise interference, energy propagation loss, multi-path superposition and Doppler frequency shift are also affected, so that the situation that the underwater acoustic signal is low in receiving efficiency and poor in transmission effect is caused. According to shannon's formula, under the condition of certain channel capacity, certain coding processing is needed to be carried out on the signal, so that the error rate of the signal during channel transmission can be reduced, and the signal can obtain good signal-to-noise ratio in long-distance propagation. In this patent, the purpose of selecting the coding scheme is to be able to obtain the propagation time of the signal on a certain path more accurately and to be able to combat multipaths in shallow sea environments effectively. Therefore, the patent adopts a direct sequence spread spectrum (Direct Sequence Spread Spectrum) mode of m sequences with the characteristics of interference resistance, multipath resistance, fading resistance, strong concealment and the like to code and process the transmitting signals.
The m-sequence is composed of n shift registers connected in series, generated by periodic clock triggering, each register comprising 0 or 1 two states, thus for an n-level m-sequenceFor all the excluded states, 0, the maximum period length is
The expression of the output state is:
 |
（a） |
the recurrence relation between the registers is as follows:
 |
（b） |
for formulas (a) and (b),
and->
Always 1, the summation of the two above equations is in accordance with modulo 2The addition is performed.
While the foregoing embodiments have been described in detail in connection with the embodiments of the invention, it should be understood that the foregoing embodiments are merely illustrative of the invention and are not intended to limit the invention, and any modifications, additions, substitutions and the like made within the principles of the invention are intended to be included within the scope of the invention.
Claims (2)
1. An adaptive ocean mobile acoustic chromatographic device, comprising,
a mobile observation station (100) configured to observe a plurality of mobile observation stations (100) disposed in a water area, the mobile observation station (100) including a mobile platform;
the fixed observation stations (200) are arranged in the observation water area in a staggered mode, the fixed observation stations (200) comprise pile bodies (201), a first energy component (210) and a first central control cabinet (220) are arranged on the upper portions of the pile bodies (201), a transmitting transducer (300) and a hydrophone (400) are arranged on the lower portions of the pile bodies (201), and the upper portions of the pile bodies (201) are exposed out of the water;
the device is characterized in that a transmitting transducer (300), a hydrophone (400) and a CTD sensor (500) are arranged at the bottom of the mobile platform;
the mobile observation station (100) and the fixed observation station (200) are both provided with a positioning and time service device;
the mobile platform is a wave glider (110), the wave glider (110) comprises a payload cabin (111), a wave glider underwater propeller (112) is arranged below the payload cabin (111), and the payload cabin (111) is connected with the wave glider underwater propeller (112) through a flexible cable (113);
the transmitting transducer (300), the hydrophone (400) and the CTD sensor (500) are arranged on the underwater propeller (112) of the wave glider;
auxiliary floating bodies (120) are arranged on two sides of the effective load cabin body (111), and the auxiliary floating bodies (120) are connected with the effective load cabin body (111) through connecting rod bodies (130);
the auxiliary floating body (120) comprises a first floating plate (121) and a second floating plate (122) which are arranged up and down, a plurality of limiting columns (123) are arranged between the first floating plate (121) and the second floating plate (122) in a penetrating mode, floating columns (124) are arranged between the first floating plate (121) and the second floating plate (122), and the limiting columns (123) are distributed around the floating columns (124);
the connecting rod body (130) comprises a flexible rod body (131), and a floating block (132) is arranged on the flexible rod body (131);
the pile body (201) is coaxially and slidably connected with a sliding base body (230), a plurality of auxiliary columns (240) are arranged around the pile body (201), and a netting (250) is arranged between the auxiliary columns (240) and the sliding base body (230);
an included angle is formed between the axis of the auxiliary cylinder (240) and the axis of the sliding base body (230).
2. The adaptive marine mobile acoustic tomography device of claim 1 wherein the positioning and timing device is a GPS/beidou receiver chip.
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| CN117434295B (en) * | 2023-10-24 | 2024-04-05 | 广州远动信息技术有限公司 | Intelligent processing and evaluating method for acoustic chromatographic signal intensity data |
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