CN114459591B - Deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device and system - Google Patents
Deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device and system Download PDFInfo
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- CN114459591B CN114459591B CN202111632321.XA CN202111632321A CN114459591B CN 114459591 B CN114459591 B CN 114459591B CN 202111632321 A CN202111632321 A CN 202111632321A CN 114459591 B CN114459591 B CN 114459591B
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- 229910052741 iridium Inorganic materials 0.000 claims description 6
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 6
- 238000004073 vulcanization Methods 0.000 claims description 6
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- 230000013011 mating Effects 0.000 claims 1
- 230000007774 longterm Effects 0.000 abstract description 6
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- 229920000271 Kevlar® Polymers 0.000 description 5
- 239000004761 kevlar Substances 0.000 description 5
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- 238000006243 chemical reaction Methods 0.000 description 4
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- 238000011160 research Methods 0.000 description 3
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/03—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses by using non-electrical means
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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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- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device and a system, wherein the submerged buoy device comprises: the device comprises a cavity structure and a detection structure arranged in the cavity structure, wherein the detection structure is used for synchronously and co-point acquiring scalar information and vector information of a sound field; the detection structure comprises: the host structure is arranged in the cavity structure; the hydrophone probe structure is arranged at the lower end of the cavity structure and is in signal connection with the host structure. According to the invention, through the arrangement mode of signal connection of the hydrophone probe structure and the host structure, sound pressure and particle acceleration vector information of a sound field where the hydrophone probe structure is positioned can be picked up synchronously in a spatial co-point mode, the purpose of long-term stable monitoring of a target in the deep sea at two kilometers underwater is realized, and the effects of stable and durable monitoring time and higher sensitivity and accuracy are achieved.
Description
Technical Field
The invention relates to the field of deep sea vector acoustics, in particular to a deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device and a deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy system.
Background
At present, the high-sensitivity underwater sound long-term acquisition and recording system is indispensable in application scenes such as ocean sound field environment monitoring, underwater target detection, submarine resource exploration, underwater sound physical research and the like. Compared with a hydrophone array based on a submarine observation network, the self-contained hydrophone submerged buoy is certainly a mode with higher efficiency and cost.
In the existing detection design and implementation scheme, the hydrophone submerged buoy generally adopts a piezoelectric hydrophone, the piezoelectric hydrophone has the problems of lower sensitivity, narrower frequency band response, poor electromagnetic interference resistance, poor severe environment resistance, complex structure and the like, the equipment adopting the optical fiber hydrophone is generally applied to shallow sea, the equipment cannot stably and autonomously operate for a long time due to high energy consumption when the acoustic pressure detection is carried out on the deep sea, in addition, the existing hydrophone submerged buoy can only monitor the acoustic pressure component, the direction of an acoustic source is difficult to estimate, and the purposes that the equipment can be positioned at the depth of 2000 meters and the continuous working time can reach half a year can not be realized.
Accordingly, the prior art is still in need of improvement and development.
Disclosure of Invention
In view of the shortcomings of the prior art, the invention aims to provide a deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device and a system, and aims to improve the problem that sound pressure and sound source direction monitoring cannot be carried out in two kilometers of deep sea due to poor sensitivity and poor severe environment resistance of the existing submerged buoy device.
The technical scheme of the invention is as follows:
a deep sea high sensitivity fiber optic vector acoustic detection submerged buoy device, comprising:
The device comprises a cavity structure and a detection structure arranged in the cavity structure, wherein the detection structure is used for synchronously and co-point acquiring scalar information and vector information of a sound field;
the detection structure comprises:
The host structure is arranged in the cavity structure;
the hydrophone probe structure is arranged at the lower end of the cavity structure and is in signal connection with the host structure.
The deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device, wherein the hydrophone probe structure comprises:
the optical fiber sound pressure hydrophone is used for acquiring sound pressure at the sound field;
The optical fiber vector hydrophone is used for acquiring particle acceleration vector information.
The deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device, wherein the host structure comprises:
the optical transmitting module is used for transmitting optical signals;
and the signal processing board is in signal connection with the optical transmitting module and is used for receiving, demodulating and converting the signals of the hydrophone probe structure.
The deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device comprises a main machine structure, and is characterized in that the main machine structure further comprises an attitude sensor connected with the signal processing board in a signal mode, wherein the attitude sensor is arranged in parallel with the optical fiber vector hydrophone and used for adjusting the attitude of the optical fiber vector hydrophone.
The deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device is characterized in that a battery assembly for supplying power to the device is arranged in the cavity structure.
The deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device is characterized in that a fixed support is arranged at the lower end of a cavity structure, and a hydrophone probe structure is arranged on the fixed support by adopting vulcanization package and internal oil filling compensation package.
The deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device further comprises:
The floating ball structure is used for floating the cavity structure;
The iridium beacon machine is arranged at the upper end of the floating ball structure and used for sending position information;
the first connecting piece is fixedly connected with the lower end of the floating ball structure, and the floating ball structure is connected with the cavity structure through the first connecting piece;
the weight removing structure is used for controlling the sinking or floating of the cavity structure;
The second connecting piece is fixedly connected with the cavity structure, and the cavity structure is connected with the weight removing structure through the second connecting piece.
The deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device, wherein the weight removing structure comprises:
The acoustic releaser is fixedly connected with the second connecting piece;
and the anchor block is detachably connected with the acoustic releaser.
The deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device further comprises a depth sensor arranged in the cavity structure, and the depth sensor is used for acquiring depth information.
The deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy system comprises the deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device, and further comprises land supporting equipment in signal connection with the submerged buoy device.
The beneficial effects are that: the invention provides a deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device and a system, wherein the submerged buoy device comprises: the device comprises a cavity structure and a detection structure arranged in the cavity structure, wherein the detection structure is used for synchronously and co-point acquiring scalar information and vector information of a sound field; the detection structure comprises: the host structure is arranged in the cavity structure; the hydrophone probe structure is arranged at the lower end of the cavity structure and is in signal connection with the host structure. According to the invention, through the arrangement mode of signal connection of the hydrophone probe structure and the host structure, sound pressure and particle acceleration vector information of a sound field where the hydrophone probe structure is positioned can be picked up synchronously in a spatial co-point mode, the purpose of long-term stable monitoring of a target in the deep sea at two kilometers underwater is realized, and the effects of stable and durable monitoring time and higher sensitivity and accuracy are achieved.
Drawings
Fig. 1 is a schematic plane structure diagram of a deep sea high sensitivity optical fiber vector acoustic detection submerged buoy device of the invention.
Fig. 2 is a diagram showing the connection of an electronic system of the deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device.
Detailed Description
The invention provides a deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device and a system, which are used for making the purposes, the technical scheme and the effects of the invention clearer and more definite, and are further described in detail below. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It should also be noted that in the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus, terms describing the positional relationship in the drawings are merely for exemplary illustration and are not to be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.
In the existing detection design and implementation scheme, the hydrophone submerged buoy generally adopts a piezoelectric hydrophone, the piezoelectric hydrophone has the problems of lower sensitivity, narrower frequency band response, poor electromagnetic interference resistance, poor severe environment resistance, complex structure and the like, the equipment adopting the optical fiber hydrophone is generally applied to shallow sea, the equipment cannot stably and autonomously operate for a long time due to high energy consumption when the acoustic pressure detection is carried out on the deep sea, in addition, the existing hydrophone submerged buoy can only monitor the acoustic pressure component, the direction of an acoustic source is difficult to estimate, and the purposes that the equipment can be positioned at the depth of 2000 meters and the continuous working time can reach half a year can not be realized.
In order to solve the above problems, the present invention provides a deep sea high sensitivity optical fiber vector acoustic detection submerged buoy device, which can synchronously pick up sound pressure and particle acceleration vector information at a sound field where a probe is located in a space co-point mode, has good directivity, can be used for acquiring underwater noise and monitoring underwater targets, and can be further applied to important application scenes such as ocean sound field environment monitoring, submarine resource exploration, underwater sound physical research, etc., as shown in fig. 1, the submerged buoy device comprises: the device comprises a cavity structure 100 and a detection structure 200 arranged on the cavity structure 100, wherein the detection structure 200 is used for synchronously and co-point acquiring sound field scalar information and vector information; the probe structure 200 includes: the host structure 210 is disposed inside the cavity structure 100; the hydrophone probe structure 13 is arranged at the lower end of the cavity structure 100, and the hydrophone probe structure 13 is in signal connection with the host structure 210.
Specifically, the cavity structure 100 includes that the titanium alloy material is spherical cavity 18 and set up in the fixed bolster 12 of cavity 18 lower extreme, the inside electron storehouse of cavity 18 is divided into the instrument storehouse of upper portion and the battery compartment of lower part by central baffle 8, the central baffle 8 upper end stacks gradually and is provided with light emission module 7, signal processing board 6 with the light signal connection of light generation module 7, the gesture sensor 5 with signal processing board 6 optical signal connection, install the group battery 9 that provides the submerged buoy device power in the battery compartment, be provided with hydrophone probe 13 on the fixed bolster 12 of cavity 19 lower extreme, hydrophone probe 13 comprises shell, optic fibre acoustic pressure hydrophone and optical fiber vector hydrophone, the shell adopts the vulcanization mode to make, and optic fibre acoustic pressure hydrophone and optical fiber vector set up in the shell, and the hydrophone is full of insulating oil assembly in the shell inside, through the detection structure, sound pressure and particle acceleration vector information of sound field department that the probe located, and have good directionality, mainly used for acquisition and underwater noise's target monitoring, and can long-term steady operation, the lug upper end is equipped with the top of the lug and is equipped with the acoustic lug and the weight 4, the acoustic lug is equipped with the acoustic lug 4, the position is equipped with the acoustic lug 4 and is connected with the acoustic lug 2 through the position of the top of the acoustic cable 10 and the acoustic lug 15, the top of the acoustic lug is equipped with the acoustic lug 15, the position of the acoustic lug is connected with the top of the acoustic lug 15 through the top of the anchor 15, the top of the acoustic lug 15, the top of the jack 15 is set 15, the top of the jack 15 is realized through the acoustic lug 15.
In the preferred embodiment of the invention, due to the adoption of the technical scheme, through the arrangement mode of signal connection of the hydrophone probe structure and the host structure, the sound pressure and particle acceleration vector information of the sound field where the hydrophone probe structure is positioned can be picked up in a space co-point mode, the purpose of long-term stable monitoring of the target in the deep sea at two kilometers underwater is realized, and the effects of stable and durable monitoring time and higher sensitivity and accuracy are achieved.
In this embodiment, the hydrophone probe structure 13 comprises: the optical fiber sound pressure hydrophone is used for acquiring sound pressure at the sound field; the optical fiber vector hydrophone is used for acquiring particle acceleration vector information.
Specifically, the hydrophone probe structure 13 (that is, the hydrophone probe) is composed of a housing, an optical fiber sound pressure hydrophone and a three-dimensional optical fiber vector hydrophone, wherein the optical fiber sound pressure hydrophone and the optical fiber vector hydrophone both use a Michelson optical fiber interferometer as an optical sensing element, and perform optical phase detection by using an optical coherence detection technology.
In this embodiment, a fixed support 12 is installed at the lower end of the cavity structure 100, and the hydrophone probe structure 13 is installed on the fixed support 12 by using a vulcanization package and an internal oil filling compensation package.
Specifically, the housing of the hydrophone probe structure 13 is manufactured in a vulcanization mode, an optical fiber sound pressure hydrophone and an optical fiber vector hydrophone are installed inside the housing, insulating oil is filled inside the housing to form a hydrophone probe, and the hydrophone probe is connected with an 8-core watertight optical plug inside the cavity structure 100 through the 8-core watertight optical plug outside the housing.
Further, the detection structure 200 (i.e., the fiber optic acoustic vector sensor) includes one acoustic pressure channel of one fiber optic acoustic pressure hydrophone and three vector channels of one fiber optic vector hydrophone.
It should be noted that, the encapsulation process combining the vulcanization encapsulation and the internal oil filling compensation is to reduce the seawater corrosion, reduce the influence of the seawater turbulence on the acoustic detection as much as possible, and improve the stable working capacity of the acoustic probe.
As shown in fig. 1, the cavity structure 100 includes a cavity 18 made of titanium alloy, the cavity 18 is provided with a spherical shell, an electronic cabin is arranged inside the cavity 18, a central partition 8 dividing the electronic cabin into an upper part and a lower part is arranged inside the cavity 18, the electronic cabin at the upper part of the central partition 8 is an instrument cabin for installing the host structure 210, a fixed bracket 12 is welded at the bottom of the cavity 18, and a hydrophone probe is fixedly installed on the fixed bracket 12 to realize rigid and fixedly connected installation with the cavity 18; the hydrophone probe is connected with the electronic cabin inside the cavity 18 through an 8-core watertight optical plug (i.e. the hydrophone probe is connected with a second optical plug of the electronic cabin inside the cavity 18 through a first optical plug outside the housing).
Further, the network structure is reserved on the cavity 18, after the submerged buoy device is recovered, the data in the data storage medium can be directly obtained through the network interface on the cavity 18, and the network interface can also expand the deep sea underwater sound communication equipment and is used for real-time transmission of submerged buoy state data, acquisition and storage data.
In this embodiment, the host structure 210 includes: an optical emission module 7 for emitting an optical signal; and the signal processing board 6 is in signal connection with the optical transmitting module 7 and is used for receiving, demodulating and converting the signals of the hydrophone probe structure 13.
Specifically, the host structure 210 further includes a posture sensor 5 in signal connection with the signal processing board 6, where the posture sensor 5 is disposed parallel to the optical fiber vector hydrophone, and is used for adjusting the posture of the optical fiber vector hydrophone.
As shown in fig. 1, the host structure 210 includes a light-emitting die plate 7 provided on the center spacer 8, a signal processing board 6 located above the light-emitting die plate 7 and signal-connected, and an attitude sensor 5 located above the signal processing board 6 and signal-connected with the signal processing board 6, so that scalar information and vector information of a sound field are synchronously and co-sited acquired by a hydrophone probe, and demodulation of the sound field signal is realized by a signal demodulation technique.
Specifically, the light source employs a narrow linewidth, low noise tunable semiconductor laser.
It should be noted that, the light emitting module 7 is used as a source of the whole device, the quality of the light signal emitted by the light source directly affects the quality of the returned light of the device, and further affects the detection distance and the orientation precision of the device, and by adopting the tunable semiconductor laser, the monitoring sensitivity and the accuracy of the submerged buoy device are improved.
In this embodiment, a battery assembly 9 is provided within the cavity structure 100 to power the device.
As shown in fig. 1, the electronic bin at the lower part of the central partition plate 8 inside the cavity 18 is a battery bin, and is used for installing a battery assembly, namely a battery pack for providing power for the submerged buoy device, and the battery pack is in signal connection with the signal processing board 6.
Specifically, the signal processing board 6 has the main functions of receiving, demodulating and converting the optical signals of the hydrophone probe 13; the signal processing board 6 is also built with a data storage medium in which sound field data, attitude data, depth data, or marine hydrologic environment parameter data during the operating time can be stored.
In this embodiment, the apparatus further includes a depth sensor disposed in the cavity structure 100, where the depth sensor is configured to obtain depth information.
Specifically, as shown in fig. 1, a reserved threaded hole is reserved at the lower part of the cavity 18, that is, a reserved sensor interface 11 is arranged at the lower end of the cavity 18, the reserved sensor structure 11 is connected with a depth sensor, and the reserved sensor structure 11 can also be converted into a CTD mounting interface through an adapter.
Further, the depth sensor employs a hydrostatic pressure sensor, so that the depth sensor can acquire depth information of the cavity 18 in real time by measuring the hydrostatic pressure of the seawater to convert it into depth information.
It should be noted that, the signal processing board 6 has a power supply monitoring function, and when the power supply of the internal battery pack does not meet the working requirement of the device, the device is automatically turned off to protect the stored information, the light source and other valuable devices; the device can also preset a section of duty table, set the startup and shutdown time, the startup is a normal working mode, and the shutdown is a low-power consumption sleep mode; the device does not need to detect when in shutdown, and unnecessary devices such as the light source 7, the attitude sensor 5 and the like are closed, so that the device operates with low power consumption as much as possible. When the next starting time comes, the normal working mode is automatically entered; the duty table function is a multiplier of the working time of the submerged buoy device, and the working time of the device can be extended to more than one year by reasonably setting the duty function.
It should be noted that, the attitude sensor 5 is located inside the cavity 18 and is used for providing attitude information for the submerged buoy device, so as to locate the orientation angle and the horizontal angle of the vector sensor; the attitude sensor 5 is fixedly connected and installed in the cavity, and three axes (namely x ', y ' and z ' axes) of the attitude sensor 5 are parallel to three axes (namely x, y and z axes) of the optical fiber vector hydrophone when the attitude sensor 5 is installed, so that the attitude of the optical fiber vector hydrophone is corrected; the rotation of the cartesian coordinate system of the fiber optic vector hydrophone measuring particle acceleration relative to the geographic coordinate system applied by the attitude sensor 5 is caused by the rocking motion of the hydrophone. The attitude sensor 5, which is fixed to the fiber optic vector hydrophone, provides its yaw attitude data so that particle acceleration vectors or target azimuth estimates measured by the fiber optic vector hydrophone at different attitudes can be transformed into a fixed geographic coordinate system.
In this embodiment, the submerged buoy device further includes:
a floating ball structure 2 for floating up the cavity structure 100;
the iridium beacon machine 1 is arranged at the upper end of the floating ball structure 2 and is used for sending position information;
the first connecting piece 3 is fixedly connected with the lower end of the floating ball structure 2, and the floating ball structure 2 is connected with the cavity structure 100 through the first connecting piece 3;
a de-weight structure 300 for controlling the sinking or floating of the cavity structure 100;
the second connecting piece 14 is fixedly connected with the cavity structure 100, and the cavity structure 100 is connected with the weight removing structure 300 through the second connecting piece 14.
Specifically, the floating ball structure 2 is a floating ball, the top end of the cavity 18 is provided with an upper lifting lug 3, the first connecting piece is an upper Kevlar pull rope 3, and the upper lifting lug 3 is fixedly connected with the floating ball 2 through the upper Kevlar pull rope 3; the iridium beacon machine 1 is placed on the top of the floating ball 2, when the submerged buoy device is recovered, the floating ball 2 floats out of the water surface, the iridium beacon machine 1 floats out of the water surface and sends position information according to a certain frequency, and the submerged buoy position can be received through mail or a handheld machine.
The floating ball 2 makes the submerged buoy device in a straightened state by positive buoyancy. The positive buoyancy provided in the water is not less than 2 times the net weight of the part of the submerged buoy device except the floating ball 2 and the weight removing structure 300.
In this embodiment, the de-duplication structure 300 includes:
an acoustic releaser 15 fixedly connected to the second connector 14;
an anchor block 17 is detachably connected to said acoustic releaser 15.
Specifically, the second connecting piece 14 is a lower kevlar rope, the lower end of the cavity 18 is connected with the upper end of the acoustic releaser 15 through the lower kevlar rope 14, and the lower end of the acoustic releaser 15 is connected with the anchor block 17 (i.e. the weight) through the anchor chain 16.
It should be noted that, anchor block 17 is connected with the lower end of acoustic releaser 15 through lower kevlar rope 14 at the bottom end of submerged buoy device, realizes the work of submerged buoy device's seat and submerged, and the negative buoyancy that anchor block 17 provided in the sea water is not less than 2 times in value of the net buoyancy in water of all other parts of device (except anchor block).
As shown in FIG. 2, the detection structure (i.e. the optical fiber underwater acoustic vector sensor) comprises a sound pressure channel and three vector channels, 4 paths of optical inputs and 4 paths of optical outputs are needed, from the viewpoints of improving the reliability of the system and reducing the power consumption, a space division multiplexing optical path connection mode is designed, light source output light is divided into 4 beams through a 1-to-4 optical fiber equipartition coupler and enters three axes (x, y and z axes) of an optical fiber sound pressure hydrophone (p) and a three-dimensional optical fiber vector hydrophone respectively, and 4 paths of optical signals returned by a vector unit are connected into the 4-channel photoelectric detector for photoelectric conversion.
The whole internal electronic bin is powered by an independent battery pack 9, direct current output by the battery is supplied to the signal processing board 6, and after voltage conversion by the signal processing board 6, the power is respectively supplied to the light source 7, the depth sensor (or CTD) and the attitude sensor 5. The light source 7 receives the modulated signal output by the signal processing board 6, the generated modulated output light is split by the 1-to-4 optical fiber beam splitter and then used as downlink light, 4 cores of the light source are connected into the hydrophone probe (namely the optical fiber underwater sound vector probe) through the 8-core optical plug, the probe return light enters the signal processing board 6 through the other 4 cores of the 8-core optical plug, and the signal processing board 6 performs photoelectric conversion, acquisition and data demodulation on the optical signal. The signal processing board 6 realizes the functions of voltage conversion, photoelectric signal detection, acquisition and processing, depth sensor (or CTD) and attitude sensor 5 data acquisition, data storage, power supply monitoring, low-power-consumption duty and the like. The data of the optical fiber underwater acoustic vector probe, the data of the depth sensor (or CTD) and the data of the attitude sensor in the storage medium can be acquired by the PC end through the gigabit network port.
In this embodiment, the deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy system includes the above-mentioned deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device, and further includes land supporting equipment in signal connection with the submerged buoy device.
Specifically, the land supporting equipment is in signal connection with the acoustic releaser 15, a specific acoustic signal instruction can be transmitted to the acoustic releaser 15 through a water surface platform, so that the cavity 18 is disconnected from the anchor block 17, the floating recovery of the cavity 18 is realized, and the position notification function is realized through the iridium beacon machine 1 after the cavity is discharged.
The system can synchronously pick up sound pressure and particle acceleration vector information of the sound field where the probe is located in a space co-point mode, has good directivity, can be used for underwater noise acquisition and underwater target monitoring, can be widely applied to important application scenes such as ocean sound field environment monitoring, submarine resource exploration, underwater sound physical research and the like, and provides technical support for ocean resource exploration, development and ocean safety protection in China. By optimizing the corrosion resistance of the probe and designing the duty working mode, the power consumption of the electronic system is reduced, the noise reduction performance of the system is improved, and compared with the traditional piezoelectric hydrophone submerged buoy, the system has the characteristics of high sensitivity, wide frequency band response, electromagnetic interference resistance, severe environment resistance, light structure and the like, can continuously work for more than half a year at a time, and can be repeatedly used.
In summary, the invention provides a deep sea high-sensitivity optical fiber vector acoustic detection submerged buoy device and a system, wherein the submerged buoy device comprises: the device comprises a cavity structure and a detection structure arranged in the cavity structure, wherein the detection structure is used for synchronously and co-point acquiring scalar information and vector information of a sound field; the detection structure comprises: the host structure is arranged in the cavity structure; the hydrophone probe structure is arranged at the lower end of the cavity structure and is in signal connection with the host structure. According to the invention, through the arrangement mode of signal connection of the hydrophone probe structure and the host structure, sound pressure and particle acceleration vector information of a sound field where the hydrophone probe structure is positioned can be picked up synchronously in a spatial co-point mode, the purpose of long-term stable monitoring of a target in the deep sea at two kilometers underwater is realized, and the effects of stable and durable monitoring time and higher sensitivity and accuracy are achieved.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (5)
1. The utility model provides a deep sea high sensitivity optic fibre vector acoustic detection submerged buoy device which characterized in that includes: the device comprises a cavity structure and a detection structure arranged in the cavity structure, wherein the detection structure is used for synchronously and co-point acquiring scalar information and vector information of a sound field;
the detection structure comprises:
The host structure is arranged in the cavity structure;
The hydrophone probe structure is arranged at the lower end of the cavity structure and is in signal connection with the host structure;
the host structure comprises:
the optical transmitting module is used for transmitting optical signals;
The signal processing board is in signal connection with the light emitting module and is used for receiving, demodulating and converting signals of the hydrophone probe structure, the signal processing board has a power supply monitoring function, and when the power supply of the internal battery pack does not meet the working requirement of the device, the equipment is automatically powered off to protect stored information, a light source and valuable devices;
The lower end of the cavity structure is provided with a fixed bracket, and the hydrophone probe structure is arranged on the fixed bracket by adopting vulcanization encapsulation and internal oil filling compensation encapsulation;
the host structure further comprises an attitude sensor in signal connection with the signal processing board, the attitude sensor is fixedly connected and installed in the cavity structure, the attitude sensor is arranged in parallel with the optical fiber vector hydrophone, three axes of the attitude sensor are parallel to three axes of the optical fiber vector, and the attitude sensor is used for adjusting the attitude of the optical fiber vector hydrophone;
The floating ball structure is used for floating the cavity structure;
The iridium beacon machine is arranged at the upper end of the floating ball structure and used for sending position information;
the first connecting piece is fixedly connected with the lower end of the floating ball structure, and the floating ball structure is connected with the cavity structure through the first connecting piece;
the weight removing structure is used for controlling the sinking or floating of the cavity structure;
The second connecting piece is fixedly connected with the cavity structure, and the cavity structure is connected with the weight removing structure through the second connecting piece;
the de-duplication structure comprises:
The acoustic releaser is fixedly connected with the second connecting piece;
and the anchor block is detachably connected with the acoustic releaser.
2. The deep sea high sensitivity fiber optic vector acoustic detection submerged buoy device of claim 1, wherein the hydrophone probe structure comprises:
the optical fiber sound pressure hydrophone is used for acquiring sound pressure at the sound field;
The optical fiber vector hydrophone is used for acquiring particle acceleration vector information.
3. The deep sea high sensitivity fiber optic vector acoustic detection submerged buoy device of claim 1, wherein a battery assembly is disposed within the cavity structure that powers the device.
4. The deep sea high sensitivity fiber optic vector acoustic detection submerged buoy device of claim 1, further comprising a depth sensor disposed in the cavity structure, the depth sensor configured to obtain depth information.
5. A deep sea high sensitivity optical fiber vector acoustic detection submerged buoy system, characterized by comprising the deep sea high sensitivity optical fiber vector acoustic detection submerged buoy device according to any one of the preceding claims 1 to 4, and further comprising land-based mating equipment in signal connection with the submerged buoy device.
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