CN107966735B - Sound source device based on underwater mobile platform - Google Patents
Sound source device based on underwater mobile platform Download PDFInfo
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- CN107966735B CN107966735B CN201711445428.7A CN201711445428A CN107966735B CN 107966735 B CN107966735 B CN 107966735B CN 201711445428 A CN201711445428 A CN 201711445428A CN 107966735 B CN107966735 B CN 107966735B
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- G—PHYSICS
- 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
- G01V1/3852—Deployment of seismic devices, e.g. of streamers to the seabed
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- G—PHYSICS
- 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
- G01V1/3861—Seismology; Seismic or acoustic prospecting or detecting specially adapted for water-covered areas control of source arrays, e.g. for far field control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/10—Aspects of acoustic signal generation or detection
- G01V2210/12—Signal generation
- G01V2210/129—Source location
- G01V2210/1297—Sea bed
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
- G01V2210/61—Analysis by combining or comparing a seismic data set with other data
- G01V2210/616—Data from specific type of measurement
- G01V2210/6161—Seismic or acoustic, e.g. land or sea measurements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
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- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Oceanography (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Power Engineering (AREA)
- Geophysics And Detection Of Objects (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a sound source device based on an underwater mobile platform, which comprises an externally hung sound source cabin, a mounting mechanism and a multi-electrode emission array mechanism, wherein the externally hung sound source cabin is arranged on the mounting mechanism; the externally hung sound source cabin is externally hung and fixed on the underwater mobile platform through the mounting mechanism; the externally hung sound source cabin is also connected with the multi-electrode emission array mechanism; and the electric energy in the external-hanging sound source cabin is transmitted to the multi-electrode emission array mechanism and then is quickly released and converted into sound energy, so that sound waves are excited. Compared with the prior art, the sound source device provided by the invention has the advantages that when in seismic exploration operation in deep sea areas, as the sound source is towed close to the sea bottom, compared with a sea surface sound source, the sound source device avoids the great attenuation of the sound wave (particularly high-frequency sound wave) by the sea water with great depth, improves the seismic exploration resolution and increases the stratum penetration depth.
Description
Technical Field
The invention relates to the technical field of geophysical exploration and investigation, in particular to a sound source device based on an underwater mobile platform.
Background
In the conventional marine seismic exploration, a sound source transmitting array is towed to the sea surface by a survey ship, sound waves transmitted by the sound source are transmitted by seawater, reflected by the sea bottom, received and collected by a hydrophone array, and then further calculated and imaged to analyze and judge the geological condition of the sea bottom. When the conventional marine seismic exploration mode works in a deep sea area, the exploration resolution and the penetration depth of the conventional marine seismic equipment to the deep sea stratum are reduced due to the fact that sea water attenuates sound waves (particularly high-frequency sound waves) greatly.
Disclosure of Invention
The invention aims to provide a sound source device based on an underwater mobile platform, which can improve the marine seismic exploration resolution and the stratum penetration depth of a deep sea area.
In order to achieve the above object, the present invention provides the following solutions:
a sound source device based on an underwater mobile platform, wherein the sound source device is connected with the underwater mobile platform; the sound source device comprises an externally hung sound source cabin, a mounting mechanism and a multi-electrode emission array mechanism; the externally hung sound source cabin is externally hung and fixed on the underwater mobile platform through the mounting mechanism; the externally hung sound source cabin is also connected with the multi-electrode transmitting array mechanism.
Optionally, the sound source device further comprises a high-voltage transmission cable; the externally hung sound source cabin is connected with the multi-electrode transmitting array mechanism through the high-voltage transmission cable; the high-voltage transmission cable at least comprises two wires, namely a high-potential wire and a zero-potential wire.
Optionally, the sound source device further comprises a tail dragging mechanism; the tail dragging mechanism is a Z-shaped or L-shaped connecting rod; one end of the connecting rod is fixedly connected with the tail of the underwater mobile platform, and the other end of the connecting rod is connected with the high-voltage transmission cable in a hanging mode; and the tail towing mechanism is used for bearing towing tension of the high-voltage transmission cable and the multi-electrode launching array mechanism in the navigation process of the underwater mobile platform.
Optionally, the externally hung sound source cabin is a sealed shell; the shell comprises a sound source host module and a battery pack;
the sound source host module comprises a central controller, an energy storage capacitor group, a charging unit, a sampling circuit, a discharging unit, a photoelectric isolation interface, a wireless network interface and a power management module, wherein the charging unit, the sampling circuit, the discharging unit, the photoelectric isolation interface, the wireless network interface and the power management module are all connected with the central controller;
the battery pack is connected with the central controller through the power management module; the power management module is used for managing the battery pack, avoiding overcharge and overdischarge of the battery pack, and prolonging the service life of the battery pack;
the energy storage capacitor group is connected with the charging unit, the sampling circuit and the discharging unit;
the discharge unit is connected with the multi-electrode emission array mechanism;
the energy storage capacitor group consists of a plurality of pulse energy storage capacitors;
the sampling circuit is used for carrying out partial pressure sampling on the voltage of the energy storage capacitor group to obtain a voltage value of the energy storage capacitor group and transmitting the voltage value to the central controller; the sampling circuit is a circuit consisting of two resistors;
the photoelectric isolation interface is used for receiving an external trigger signal;
the wireless network interface is used for receiving sound source parameters set by a user and transmitting the sound source parameters to the central controller; the wireless network interface is a Bluetooth interface or a WIFI interface;
the central controller is used for controlling the charging and discharging of the energy storage capacitor group according to the sound source parameter, the voltage value of the energy storage capacitor group and the external trigger signal; the central controller is a controller composed of an N87C196KD singlechip and a PSD311 peripheral chip.
Optionally, the charging unit comprises a boost rectifying charging circuit and a charging control circuit;
the central controller is connected with the boosting, rectifying and charging circuit through the charging control circuit; the boosting rectification charging circuit is also connected with the energy storage capacitor group and the battery group;
the boosting and rectifying charging circuit is used for inverting, boosting and rectifying the direct current power supply in the battery pack and converting the low-voltage direct current power supply in the battery pack into a high-voltage direct current power supply; the boosting rectification charging circuit is a circuit consisting of an IGBT full-bridge circuit and a high-frequency high-voltage transformer; the charging control circuit is a circuit consisting of two 2SD106AI-17 driving chips.
Optionally, the discharge unit comprises an all-solid discharge switch and a discharge switch control circuit;
the central controller is connected with the all-solid discharge switch through the discharge switch control circuit; the all-solid discharge switch is also connected with the energy storage capacitor group and the multi-electrode emission array mechanism; the all-solid-state discharge switch is a DNX_PT85QWx thyristor.
Optionally, the multi-electrode transmitting array mechanism comprises a high-voltage electrode array, a metal frame, an acoustically transparent pressure-resistant cabin, an electrolyte solution and a buoyancy cylinder structure;
the electrolyte solution is filled in the sound-transmitting pressure-resistant cabin, and the high-voltage electrode array and the metal frame are immersed in the electrolyte solution; the buoyancy cylinder structures are two and are respectively positioned at the head end and the tail end of the sound-transmitting pressure-resistant cabin and are fixedly connected with the sound-transmitting pressure-resistant cabin; the high-voltage electrode array is connected with the high-potential electric wire, and the metal frame is connected with a zero-potential electric wire;
the high-voltage electrode array is used as a high-voltage potential of the discharge of the multi-electrode emission array mechanism, the metal frame is used as a zero potential of the discharge of the multi-electrode emission array mechanism, and the electrolyte solution is used as a discharge channel between the high-voltage potential and the zero potential of the multi-electrode emission array mechanism;
the sound-transmitting pressure-resistant cabin is used for isolating a deep water high static pressure environment, so that the high-voltage electrode array and the metal frame are in a normal pressure environment; the buoyancy cylinder structure is used for counteracting the weight of the high-voltage electrode array and the metal frame.
Optionally, the high voltage electrode array includes a plurality of high voltage discharge electrodes; the electrolyte solution is seawater; the sound-transmitting pressure-resistant cabin is made of carbon fiber materials; the buoyancy cylinder structure is made of glass microsphere buoyancy materials.
Optionally, the mounting mechanism includes a fixing bracket, a fixing bolt, and a shock pad; and the externally hung sound source cabin is externally hung and fixed at the bottom or the side wings of the underwater mobile platform through the fixing support, the fixing bolts and the shock pads.
Optionally, the sound source device further comprises a watertight connector, and the optoelectronic isolation interface of the external hanging sound source cabin is connected with the load interface of the underwater mobile platform through the watertight connector and is used for realizing transmission of the external trigger signal.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a sound source device based on an underwater mobile platform, which comprises an externally hung sound source cabin, a mounting mechanism and a multi-electrode transmitting array mechanism, wherein the externally hung sound source cabin is arranged on the mounting mechanism; the externally hung sound source cabin is externally hung and fixed on the underwater mobile platform through the mounting mechanism; the externally hung sound source cabin is also connected with the multi-electrode transmitting array mechanism; and the electric energy in the externally-hung sound source cabin is transmitted to the multi-electrode transmitting array mechanism and then is quickly released and converted into sound energy, so that sound waves are excited. Compared with the prior art, the sound source device provided by the invention has the following advantages: (1) The sound source device can be conveniently applied to an underwater mobile platform; when the sound source device performs earthquake detection operation in a deep sea area, as the sound source is towed close to the sea bottom, compared with a sea surface sound source, the sound source device avoids the great attenuation of the sound waves (particularly high-frequency sound waves) by the sea water with great depth, improves the earthquake detection resolution and increases the stratum penetration depth. (3) The multi-electrode transmitting array mechanism is towed behind the underwater carrier, so that the vibration and interference of sound source transmission to the carrier in the underwater moving platform are reduced, and sound waves with high sound source level can be transmitted.
In addition, due to the adoption of the sound-transmitting pressure-resistant cabin in the multi-electrode transmitting array mechanism, the sound source device can be used under the condition of deep water high static pressure, and the generated sound signal frequency spectrum is equivalent to the sound source level and frequency spectrum generated at the offshore surface.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a sound source device based on an underwater mobile platform according to an embodiment of the present invention;
FIG. 2 is a block diagram of a sound source device based on an underwater mobile platform according to an embodiment of the present invention;
FIG. 3 is a block diagram of the structure of the external acoustic source module of the present invention;
FIG. 4 is a schematic side view of a multi-electrode array mechanism of the present invention;
fig. 5 is a schematic bottom view of the multi-electrode array mechanism of the present invention.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a sound source device based on an underwater mobile platform, which can improve the marine seismic exploration resolution and the stratum penetration depth of a deep sea area.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Fig. 1 is a schematic structural diagram of a sound source device based on an underwater mobile platform according to an embodiment of the present invention. As shown in fig. 1, the sound source device of the present invention is connected with an underwater moving platform 1; the sound source device comprises an externally hung sound source cabin 2, a mounting mechanism 3, a multi-electrode transmitting array mechanism 4 and a high-voltage transmission cable 5.
The externally hung sound source cabin 2 is externally hung and fixed on the underwater mobile platform 1 through the mounting mechanism 3; the externally hung sound source cabin 2 is connected with the multi-electrode transmitting array mechanism 4 through the high-voltage transmission cable 5; the electric energy in the externally-hung sound source cabin 2 is transmitted to the multi-electrode transmitting array mechanism 4 and then is quickly released and converted into sound energy, so that sound waves are excited.
The sound source device also comprises a tail dragging mechanism 6; the tail dragging mechanism 6 is a Z-shaped or L-shaped high-strength connecting rod; one end of the connecting rod is fixedly connected with the tail of the underwater mobile platform 1, and the other end of the connecting rod is connected with the high-voltage transmission cable 5 in a hanging mode; the tail towing mechanism 6 is used for bearing towing tension of the high-voltage transmission cable 5 and the multi-electrode launching array mechanism 4 in the navigation process of the underwater mobile platform 1.
The underwater mobile platform 1 includes various types of underwater vehicles and load interfaces including, but not limited to, autonomous Underwater Vehicles (AUV), remotely controlled unmanned vehicles (ROV), underwater gliders (glide). The sound source device further comprises a watertight connector, wherein the photoelectric isolation interface of the externally hung sound source cabin 2 is connected with the load interface of the underwater mobile platform 1 through the watertight connector and is used for realizing the transmission of the external trigger signal; and the watertight connector is also adopted between the underwater mobile platform 1 and the high-voltage transmission cable 5 for signal transmission.
The high-voltage transmission cable 5 at least comprises two wires, one is a high-potential wire, and the other is a zero-potential wire.
The high-voltage transmission cable has the following functions:
first, the device is used for transmitting the high-voltage electricity generated by the external-hanging sound source cabin 2 to the multi-electrode transmitting array mechanism 4.
Second, is used for dragging the multi-electrode array mechanism 4.
Third, the device is used for isolating the mechanical vibration generated by the multi-electrode transmitting array mechanism 4 and preventing the vibration generated by the multi-electrode transmitting array mechanism 4 during discharge excitation from interfering the underwater moving platform 1.
The mounting mechanism 3 comprises a fixed bracket, a fixed bolt and a shock pad, and is used for stably fixing the externally hung sound source cabin 2 at the bottom or the side wings of the underwater mobile platform 1.
Fig. 2 is a block diagram of a sound source device based on an underwater mobile platform according to an embodiment of the present invention, and as shown in fig. 2, the sound source device is connected with the underwater mobile platform 1; the sound source device comprises an externally hung sound source cabin 2, a mounting mechanism 3, a multi-electrode transmitting array mechanism 4, a high-voltage transmission cable 5 and a tail dragging mechanism 6.
The interior of the underwater mobile platform 1 contains an autonomous controller, a navigational controller, a load controller and a load interface. The autonomous controller is used for executing the established voyage planning and sensing environmental parameters, and optimizing or re-executing the voyage planning when the environment is unfavorable; the navigation controller is used for controlling the elements (energy, communication, propulsion, recording and navigation) of the aircraft and monitoring the status of the aircraft; the load controller performs load planning, controls load elements (sensors, recording, actuators) and monitors load conditions.
The outer shell of the externally-hung sound source cabin 2 needs to be completely sealed; the externally hung sound source cabin 2 is a sealed shell; the shell comprises a sound source host module 201 and a battery pack 202;
the sound source host module comprises a central controller, a charging unit, a discharging unit, a photoelectric isolation interface, a wireless network interface and an energy storage capacitor group, wherein the charging unit, the discharging unit, the photoelectric isolation interface, the wireless network interface and the energy storage capacitor group are all connected with the central controller.
The multi-electrode transmitting array mechanism 4 is connected with the externally hung sound source cabin 2 through the discharging unit.
Fig. 3 is a block diagram of the external sound source cabin according to the present invention, and as shown in fig. 3, the external sound source cabin 2 includes a sound source host module 201 and a battery pack 202.
The sound source host module comprises a central controller, an energy storage capacitor group, a charging unit, a sampling circuit, a discharging unit, a photoelectric isolation interface, a wireless network interface and a power management module, wherein the charging unit, the sampling circuit, the discharging unit, the photoelectric isolation interface, the wireless network interface and the power management module are all connected with the central controller.
The battery pack is connected with the central controller through the power management module; the power management module is used for managing the battery pack, avoiding overcharge and overdischarge of the battery pack, and prolonging the service life of the battery pack.
The energy storage capacitor group is connected with the charging unit, the sampling circuit and the discharging unit.
The discharge unit is connected with the multi-electrode emission array mechanism.
The energy storage capacitor group consists of a plurality of pulse energy storage capacitors. The pulse energy storage capacitor can be used for rapidly charging and storing electric energy and can be used for instantaneously discharging; the battery can be charged again after discharging, and then can be discharged instantaneously; preferably, the pulse energy storage capacitor is a high-voltage pulse capacitor, the charge allowable voltage is not lower than 4.2kV, and the pulse energy storage capacitor can be rapidly and completely discharged within 0.2ms after being fully charged.
The sampling circuit is used for carrying out partial pressure sampling on the voltage of the energy storage capacitor group to obtain a voltage value of the energy storage capacitor group and transmitting the voltage value to the central controller. The sampling circuit is a circuit composed of two resistors, and the difference of the resistance values of the two resistors is at least 10 times. Preferably, the two resistors of the sampling circuit of the present invention have a resistance of 99 kilo-ohms and a resistance of 1 kilo-ohms, and if the sampling voltage is 1 volt, the capacitance voltage is 1000 volts.
The photoelectric isolation interface is used for receiving an external trigger signal. The external trigger signal may come from an underwater vehicle or from other equipment. And when an external trigger signal is generated, the TTL electric signal is transmitted to the central control unit after photoelectric isolation. The photoelectric isolation can avoid the interference and damage of the high voltage inside the sound source host module to the underwater carrier or other equipment.
The wireless network interface is used for receiving sound source parameters set by a user and transmitting the sound source parameters to the central controller. The wireless network interface is a Bluetooth interface or a WIFI interface, can be connected with a computer or a mobile phone, and can also monitor the running state of the sound source in real time if necessary.
The central controller is used for controlling the charging and discharging of the energy storage capacitor group according to the sound source parameter, the voltage value of the energy storage capacitor group and the external trigger signal; the central controller is a controller composed of an N87C196KD singlechip and a PSD311 peripheral chip.
The charging unit comprises a boost rectifying charging circuit and a charging control circuit.
The central controller is connected with the boosting, rectifying and charging circuit through the charging control circuit; the boosting rectification charging circuit is also connected with the energy storage capacitor group and the battery group.
The boost rectifying charging circuit is used for inverting, boosting and rectifying the direct current power supply in the battery pack and converting the low-voltage direct current power supply in the battery pack into a high-voltage direct current power supply. The boost rectifying charging circuit is a circuit consisting of an IGBT full-bridge circuit and a high-frequency high-voltage transformer. The charging control circuit is a circuit consisting of two 2SD106AI-17 driving chips. The charging control circuit starts or stops charging according to the command of the central controller
And starting or stopping the charging control circuit through a command transmitted by the central controller, and further controlling the starting or stopping of the boosting and rectifying charging circuit.
The discharge unit comprises an all-solid discharge switch and a discharge switch control circuit; the central controller is connected with the all-solid discharge switch through the discharge switch control circuit; the all-solid discharge switch is also connected with the energy storage capacitor group and the multi-electrode emission array mechanism; the all-solid discharge switch comprises a thyristor and a freewheeling diode, wherein the thyristor has unidirectional conduction characteristic, and the thyristor is matched with the freewheeling diode, so that the single-pulse rapid discharge of the energy storage capacitor group can be realized. And the discharging switch control circuit generates instant large current when receiving a trigger signal, so that the thyristor is conducted, and the energy storage capacitor group releases the electric energy. Preferably, the thyristor is a dnx_pt85QWx thyristor.
In addition, the power management module is also used for isolating and converting the battery voltage and then generating a direct current power supply with proper voltage to be supplied to a central controller, a charging control circuit, a discharging switch control circuit, a wireless network interface and other control circuits for use.
The central controller controls the charging control circuit to start charging or end charging according to the excitation energy set by a user and the voltage on the energy storage capacitor group; in the external trigger mode, according to the received external trigger signal, the discharge switch control circuit is controlled to close the all-solid discharge switch; and in the internal trigger mode, according to the time interval set by a user, controlling a discharge switch control circuit to close the all-solid discharge switch, and collecting and storing the working state of the system.
FIG. 4 is a schematic side view of a multi-electrode array mechanism of the present invention; fig. 5 is a schematic bottom view of the multi-electrode array mechanism of the present invention. The multi-electrode array emitting mechanism 4 shown in fig. 4 and 5 comprises a high-voltage electrode array 401, a metal frame 402, an acoustically transparent pressure-resistant cabin 403, a buoyancy cylinder structure 404 and an electrolyte solution.
The electrolyte solution is filled in the sound-transmitting pressure-proof cabin 403, and the high-voltage electrode array 401 and the metal frame 402 are immersed in the electrolyte solution; the two buoyancy cylinder structures 404 are respectively positioned at the head end and the tail end of the sound-transmitting pressure-resistant cabin 403 and are fixedly connected with the sound-transmitting pressure-resistant cabin 403; the high-voltage electrode array 401 and the metal frame 402 are both connected with the high-voltage transmission cable 5, the high-voltage electrode array 401 is connected with the high-potential electric wire, and the metal frame 402 is connected with the zero-potential electric wire; according to the multi-electrode transmitting array mechanism 4, when an all-solid discharging switch in the sound source host module 201 is closed, electric energy stored by the energy storage capacitor group is rapidly released through the high-voltage electrode array 401 and the metal frame 402. The rapidly released electrical energy is converted into acoustic energy, which excites sound waves.
The high-voltage electrode array 401 is used as a high-voltage potential of the discharge of the multi-electrode array launching mechanism 4, the high-voltage electrode array 401 is used as a zero potential of the discharge of the multi-electrode array launching mechanism 4, and the electrolyte solution is used as a discharge channel between the high-voltage potential and the zero potential of the multi-electrode array launching mechanism 4.
The sound-transmitting pressure-resistant cabin 403 is used for isolating the deep water high static pressure environment, so that the high-voltage electrode array 401 and the metal frame 402 are in a normal pressure environment. The electroacoustic conversion performance of the high-voltage electrode array 401 and the metal frame 402 is more suitable for marine seismic exploration under normal pressure. Preferably, the acoustically transparent pressure pod 403 is operable in a 2000m deep water high static pressure environment; the buoyancy cylinder structure 404 is used to counteract the weight of the high voltage electrode array 401 and the metal frame 402, so that the multi-electrode array launching mechanism 4 as a whole presents approximately zero buoyancy. The buoyancy cylinder structure 404 is made of glass bead buoyancy materials.
The high voltage electrode array 401 includes a plurality of high voltage discharge electrodes; the electrolyte solution is seawater.
The sound-transmitting pressure-resistant cabin 403 has both sealing pressure resistance and good sound-transmitting performance. The acoustically transparent pressure-resistant chamber 403 is made of a carbon fiber material.
Detailed Description
The specific working steps of the sound source device based on the underwater mobile platform provided by the invention are as follows:
(1) The survey vessel arrives at the given working sea area.
(2) The user sets working parameters such as excitation energy, working mode, excitation interval, working schedule and the like of the sound source host module through a wireless network interface (Bluetooth interface or WIFI interface), the sound source host module is set to work in an internal trigger working mode, and the testing equipment is in a normal working state.
(3) And the externally hung sound source cabin is hung on an Autonomous Underwater Vehicle (AUV) through a mounting mechanism.
(4) The multi-electrode transmitting array mechanism is arranged at the tail of the AUV through a tail dragging mechanism and is connected with the externally hung sound source cabin through a high-voltage transmission cable.
(5) Setting AUV working parameters, and laying the AUV to the sea surface, wherein the AUV sails according to the set working parameters, working depth and working route.
(6) When reaching the designated depth, the sound source starts to work, and sound waves (artificial source seismic waves) are emitted according to the preset excitation interval.
(7) The emitted sound wave is received by a multi-channel hydrophone linear array connected with AUV equipment after being reflected by the stratum; the multi-channel hydrophone linear array can be a vertical linear array submerged buoy, a seismic streamer towed at the tail of a survey vessel, or a seismic streamer towed at the tail of an AUV.
(8) After the work is finished, the sound source host module is closed, and the AUV is commanded to return to the water surface to reach the vicinity of the investigation ship.
(9) The AUV and the multi-electrode transmitting array mechanism are recovered to the deck of the investigation ship.
(10) And (5) charging the battery packs of the AUV and the external sound source cabin, and preparing for the next-stage laying work.
Detailed Description
The specific working steps of the sound source device based on the underwater mobile platform provided by the invention are as follows:
(1) The survey vessel arrives at the given working sea area.
(2) The user sets working parameters such as excitation energy, working mode, excitation interval, working schedule and the like of the sound source host module through a wireless network interface (Bluetooth or WIFI), the sound source host module is set to work in an external trigger working mode, and the testing equipment is in a normal working state.
(3) And the externally hung sound source cabin is hung on an Autonomous Underwater Vehicle (AUV) through a mounting mechanism.
(4) The multi-electrode transmitting array mechanism is arranged at the tail of the AUV through a tail dragging mechanism and is connected with the externally hung sound source cabin through a high-voltage transmission cable.
(5) Setting AUV working parameters, and laying the AUV to the sea surface, wherein the AUV sails according to the set working parameters, working depth and working route.
(6) When reaching the designated depth, the AUV outputs TTL trigger pulse signals, or other devices carried by the AUV output TTL trigger pulse signals, so as to trigger the sound source host to emit sound waves (artificial source seismic waves).
(7) The emitted sound wave is received by a multi-channel hydrophone linear array connected with an AUV after being reflected by a stratum; the multi-channel hydrophone linear array can be a vertical linear array submerged buoy, a seismic streamer towed at the tail of a survey vessel, or a seismic streamer towed at the tail of an AUV.
(8) After the work is finished, the sound source host is closed, and the AUV is commanded to return to the water surface to reach the vicinity of the investigation ship.
(9) The AUV and the multi-electrode transmitting array mechanism are recovered to the deck of the investigation ship.
(10) And (5) charging the battery packs of the AUV and the external sound source cabin, and preparing for the next-stage laying work.
Compared with the prior art, the sound source device based on the underwater mobile platform has the beneficial effects that: (1) The sound source device can be conveniently applied to an underwater mobile platform; (2) When the sound source device performs earthquake detection operation in deep sea areas, as the sound source is towed near the sea bottom, compared with a sea surface sound source, the sound source device avoids the great attenuation of the sound waves (particularly high-frequency sound waves) by the sea water with great depth, improves the earthquake detection resolution and increases the stratum penetration depth. (3) The multi-electrode transmitting array mechanism is towed behind the underwater carrier, so that the vibration and interference of sound source transmission to the carrier are reduced, and sound waves with high sound source level can be transmitted. (4) The use of the sound-transmitting pressure-resistant cabin enables the equipment to be used under the condition of deep water and high static pressure, and the generated sound signal frequency spectrum is equivalent to the sound source level and frequency spectrum generated at the offshore surface.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (7)
1. A sound source device based on an underwater mobile platform, which is characterized in that the sound source device is connected with the underwater mobile platform; the sound source device comprises an externally hung sound source cabin, a mounting mechanism and a multi-electrode emission array mechanism; the externally hung sound source cabin is externally hung and fixed on the underwater mobile platform through the mounting mechanism; the externally hung sound source cabin is also connected with the multi-electrode transmitting array mechanism;
the sound source device also comprises a high-voltage transmission cable; the externally hung sound source cabin is connected with the multi-electrode transmitting array mechanism through the high-voltage transmission cable; the high-voltage transmission cable at least comprises two wires, namely a high-potential wire and a zero-potential wire;
the multi-electrode transmitting array mechanism comprises a high-voltage electrode array, a metal frame, an acoustically transparent pressure-resistant cabin, electrolyte solution and a buoyancy cylinder structure;
the electrolyte solution is filled in the sound-transmitting pressure-resistant cabin, and the high-voltage electrode array and the metal frame are immersed in the electrolyte solution; the buoyancy cylinder structures are two and are respectively positioned at the head end and the tail end of the sound-transmitting pressure-resistant cabin and are fixedly connected with the sound-transmitting pressure-resistant cabin; the high-voltage electrode array is connected with the high-potential electric wire, and the metal frame is connected with a zero-potential electric wire;
the high-voltage electrode array is used as a high-voltage potential of the discharge of the multi-electrode emission array mechanism, the metal frame is used as a zero potential of the discharge of the multi-electrode emission array mechanism, and the electrolyte solution is used as a discharge channel between the high-voltage potential and the zero potential of the multi-electrode emission array mechanism;
the sound-transmitting pressure-resistant cabin is used for isolating a deep water high static pressure environment, so that the high-voltage electrode array and the metal frame are in a normal pressure environment; the buoyancy cylinder structure is used for counteracting the weight of the high-voltage electrode array and the metal frame;
the mounting mechanism comprises a fixed bracket, a fixed bolt and a shock pad; and the externally hung sound source cabin is externally hung and fixed at the bottom or the side wings of the underwater mobile platform through the fixing support, the fixing bolts and the shock pads.
2. The sound source device of claim 1, further comprising a tail drag mechanism; the tail dragging mechanism is a Z-shaped or L-shaped connecting rod; one end of the connecting rod is fixedly connected with the tail of the underwater mobile platform, and the other end of the connecting rod is connected with the high-voltage transmission cable in a hanging mode; and the tail towing mechanism is used for bearing towing tension of the high-voltage transmission cable and the multi-electrode launching array mechanism in the navigation process of the underwater mobile platform.
3. The sound source device of claim 1, wherein the externally hung sound source compartment is a sealed enclosure; the shell comprises a sound source host module and a battery pack;
the sound source host module comprises a central controller, an energy storage capacitor group, a charging unit, a sampling circuit, a discharging unit, a photoelectric isolation interface, a wireless network interface and a power management module, wherein the charging unit, the sampling circuit, the discharging unit, the photoelectric isolation interface, the wireless network interface and the power management module are all connected with the central controller;
the battery pack is connected with the central controller through the power management module; the power management module is used for managing the battery pack, avoiding overcharge and overdischarge of the battery pack, and prolonging the service life of the battery pack;
the energy storage capacitor group is connected with the charging unit, the sampling circuit and the discharging unit;
the discharge unit is connected with the multi-electrode emission array mechanism;
the energy storage capacitor group consists of a plurality of pulse energy storage capacitors;
the sampling circuit is used for carrying out partial pressure sampling on the voltage of the energy storage capacitor group to obtain a voltage value of the energy storage capacitor group and transmitting the voltage value to the central controller; the sampling circuit is a circuit consisting of two resistors;
the photoelectric isolation interface is used for receiving an external trigger signal;
the wireless network interface is used for receiving sound source parameters set by a user and transmitting the sound source parameters to the central controller; the wireless network interface is a Bluetooth interface or a WIFI interface;
the central controller is used for controlling the charging and discharging of the energy storage capacitor group according to the sound source parameter, the voltage value of the energy storage capacitor group and the external trigger signal; the central controller is a controller composed of an N87C196KD singlechip and a PSD311 peripheral chip.
4. A sound source device according to claim 3, wherein the charging unit includes a boost rectifying charging circuit and a charging control circuit;
the central controller is connected with the boosting, rectifying and charging circuit through the charging control circuit; the boosting rectification charging circuit is also connected with the energy storage capacitor group and the battery group;
the boosting and rectifying charging circuit is used for inverting, boosting and rectifying the direct current power supply in the battery pack and converting the low-voltage direct current power supply in the battery pack into a high-voltage direct current power supply; the boosting rectification charging circuit is a circuit consisting of an IGBT full-bridge circuit and a high-frequency high-voltage transformer; the charging control circuit is a circuit consisting of two 2SD106AI-17 driving chips.
5. A sound source device according to claim 3, wherein the discharge unit comprises an all-solid discharge switch and a discharge switch control circuit;
the central controller is connected with the all-solid discharge switch through the discharge switch control circuit; the all-solid discharge switch is also connected with the energy storage capacitor group and the multi-electrode emission array mechanism; the all-solid-state discharge switch is a DNX_PT85QWx thyristor.
6. The sound source device of claim 1, wherein the high voltage electrode array comprises a plurality of high voltage discharge electrodes; the electrolyte solution is seawater; the sound-transmitting pressure-resistant cabin is made of carbon fiber materials; the buoyancy cylinder structure is made of glass microsphere buoyancy materials.
7. A sound source device according to claim 3, further comprising a watertight connector, wherein the optoelectronic isolation interface of the external sound source compartment is connected to the load interface of the underwater mobile platform by the watertight connector for enabling transmission of the external trigger signal.
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| CN109747801A (en) * | 2019-01-25 | 2019-05-14 | 哈尔滨工程大学 | A kind of quaternary cross battle array acoustic testing system for underwater glider |
| CN110098648B (en) * | 2019-04-24 | 2023-07-07 | 青岛海洋科技中心 | Energy management system for ocean observation detection buoy |
| CN117310793B (en) * | 2023-11-29 | 2024-02-06 | 自然资源部第一海洋研究所 | Deepwater seismic source transmitting array capable of being continuously excited and working method thereof |
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