CN115127660A - Bottom-sitting type vector sensor for receiving underwater acoustic signals - Google Patents
Bottom-sitting type vector sensor for receiving underwater acoustic signals Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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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
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
- G01V1/186—Hydrophones
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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
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Abstract
The invention provides a bottom-sitting type vector sensor for receiving underwater and ground sound signals, and belongs to the technical field of underwater sound engineering. The underwater acoustic and ground sound receiving system is mainly used for simultaneously receiving underwater acoustic and ground sound signals, and solves the technical problems that the system in the prior art is high in complexity, large in span of underwater and seabed channel signal frequency ranges and difficult to simultaneously receive, and the underwater and ground sound signals are greatly influenced mutually. The underwater sound vector decoupling device comprises a ground sound vector receiving unit, an underwater sound vector receiving unit and an underwater sound scalar receiving unit, wherein the ground sound vector receiving unit is installed on a bottom plate and located in a sound decoupling cavity, the underwater sound vector receiving unit is located below the underwater sound scalar receiving unit and located on the outer side of the sound decoupling cavity, a frame is installed on the bottom plate, the ground sound vector receiving unit, the underwater sound vector receiving unit and the underwater sound scalar receiving unit are all located in the frame, and the frame, the ground sound vector receiving unit, the underwater sound vector receiving unit and the underwater sound scalar receiving unit are provided with sound-transmitting layers.
Description
Technical Field
The invention belongs to the technical field of underwater acoustic engineering, and particularly relates to a bottom-sitting type vector sensor for receiving underwater and ground acoustic signals.
Background
With the gradual reduction of the radiation noise frequency band and intensity, the underwater target detection becomes more difficult, and the limitation that the single channel obtains too little information is gradually revealed. According to the characteristic that underwater low-frequency/very low-frequency signals can be transmitted remotely not only through an underwater acoustic channel but also through a submarine channel, the dual-channel increased information content is expected to be utilized to improve the remote detection capability of very low-frequency targets.
The underwater acoustic vector signal is obtained by adopting an acoustic vector sensor, namely, the vector signal of the particle motion of the medium, such as a displacement, vibration velocity or acceleration device, can be measured, and the working frequency is generally from several hertz to thousands of hertz. On one hand, the sound pressure and the particle vibration speed in the sound field can be synchronously acquired to obtain complete information of the sound field in water; on the other hand, the self-adaptive dipole directivity control system has natural dipole directivity irrelevant to frequency, can inhibit isotropic marine environment noise, improves the signal-to-noise ratio of a received signal, and has obvious advantages in the low-frequency and very-low-frequency detection field compared with a scalar hydrophone. Submarine earth acoustic signals, operating at frequencies of about one hundred seconds to one hundred hertz, are typically acquired using submarine seismic sensors.
At present, the independent design and the use of an underwater acoustic vector sensor and an ocean bottom seismic sensor are mature, but: the underwater acoustic vector or the earth acoustic vector signal is independently received, and the information quantity is incomplete in a frequency domain, so that the very low frequency target detection is not facilitated; the underwater acoustic vector sensor and the submarine seismic sensor are simply combined, the system structure is complex, the mutual interference among signals is serious, the size is overlarge, and the marine deployment and recovery are not easy. In conclusion, a novel sensor capable of synchronously acquiring a water-ground channel signal needs to be researched.
Disclosure of Invention
In view of the above, the present invention is directed to a bottom-sitting vector sensor for receiving underwater acoustic signals, so as to solve the problems of the prior art, such as high system complexity, large span of underwater and submarine channel signal frequency ranges, difficulty in simultaneous reception, and large mutual influence between the underwater acoustic signals.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a sit bottom formula vector sensor for underwater acoustic signal receives, includes ground sound vector receiving element, underwater acoustic vector receiving element and underwater acoustic scalar receiving element, ground sound vector receiving element installs on the bottom plate and is located the sound decoupling cavity, underwater acoustic vector receiving element is located underwater acoustic scalar receiving element below and is located the sound decoupling cavity outside, install the frame on the bottom plate, ground sound vector receiving element, underwater acoustic vector receiving element and underwater acoustic scalar receiving element all are located the frame, the frame is equipped with the sound-transparent layer with ground sound vector receiving element, underwater acoustic vector receiving element and underwater acoustic scalar receiving element.
Furthermore, a preposed conditioning circuit is arranged in the sound decoupling cavity.
Furthermore, the sound decoupling cavity comprises an isolation layer and a partition plate, the isolation layer is located on the sound transmission layer, the isolation layer is installed on the bottom plate and located on the outer side of the earth sound vector receiving unit, the upper end of the isolation layer is connected with the partition plate, and the preposed conditioning circuit is installed at the lower end of the partition plate.
Furthermore, a supporting structure is installed at the upper end of the partition plate, the underwater sound vector receiving unit is installed in the supporting structure through a spring, the spring is connected with the supporting structure through a hanging hook, and an underwater sound coupling layer is arranged on the outer surface of the supporting structure.
Furthermore, a sealing cover plate is arranged on the partition plate, and a one-way oil-resistant sealing valve is arranged on the sealing cover plate.
Furthermore, the underwater sound scalar quantity receiving unit comprises an upper cover plate, a piezoelectric circular tube and a top cover plate, wherein the upper cover plate, the piezoelectric circular tube and the top cover plate are arranged at the upper end of the supporting structure, and the piezoelectric circular tube is arranged between the upper cover plate and the top cover plate.
Furthermore, an oil filling port is arranged on the upper cover plate, and an oil seal is arranged at the oil filling port.
Furthermore, the output end of the piezoelectric circular tube is connected with an underwater sound scalar output signal line, the output end of the underwater sound vector receiving unit is connected with an underwater sound vector output signal line, the output end of the earth sound vector receiving unit is connected with an earth sound vector output signal line, the underwater sound scalar output signal line, the underwater sound vector output signal line and the earth sound vector output signal line are all connected with a preposed conditioning circuit, and the preposed conditioning circuit is connected with a watertight connector through an output line.
Furthermore, the earth sound vector receiving unit comprises three built-in inertial sensors, a positioning structure and a pressure-resistant shell, wherein the built-in inertial sensors are orthogonal in pairs, the built-in inertial sensors are mounted on the positioning structure, the positioning structure is connected with the pressure-resistant shell, and a cable head is arranged outside the pressure-resistant shell.
Furthermore, the underwater acoustic vector receiving unit comprises three built-in accelerometers, a positioning substrate and a shell, wherein the built-in accelerometers, the positioning substrate and the shell are orthogonal in pairs, the built-in accelerometers are mounted on the positioning substrate, the positioning substrate is mounted in the shell, and the shell is connected with the spring through a second suspension hook.
Compared with the prior art, the invention has the beneficial effects that:
1. the sensor comprises a ground sound vector receiving unit, an underwater sound vector receiving unit and an underwater sound scalar receiving unit, wherein all the units are designed under a unified structural framework;
2. the underwater acoustic vector receiving unit is sensitive to submarine underground acoustic signals and inhibits underwater acoustic signals, the underwater acoustic vector receiving unit is sensitive to underwater acoustic signals and inhibits the underwater acoustic signals, the frequency ranges of the underwater acoustic vector receiving unit and the underwater acoustic vector receiving unit are crossed and complemented, and target information can be obtained to the maximum extent at the frequency domain level;
3. the density of the sensor is greater than the density of seawater medium, the density is equal to the density of the seabed as much as possible, the use of the underwater acoustic vector receiving unit is convenient, the density of the underwater acoustic vector receiving unit is kept near neutral buoyancy, and the underwater acoustic vector signal is convenient to be received by an inertial receiving mechanism;
4. the sensor has the characteristics of simple structure, small size, small mutual influence of underwater acoustic signals and the like, the problems that the complexity of a system in the current scheme is high, the frequency range span of signals of underwater and submarine channels is large, the signals are difficult to receive simultaneously, the mutual influence of the underwater acoustic signals is large and the like are solved, the receiving frequency range and the airspace information of the acoustic signals are expanded, the information quantity received in the frequency domain is complete, the low-frequency target detection is facilitated, a novel sensing foundation is provided for the joint receiving of the underwater acoustic signals, the usability of actual engineering is greatly improved, and more effective support is provided for the joint processing based on the underwater acoustic signals.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a core structure of a submersible vector sensor for underwater acoustic signal reception according to the present invention;
FIG. 2 is a schematic diagram of a submersible vector sensor for underwater acoustic signal reception according to the present invention;
FIG. 3 is a schematic diagram of an underwater acoustic vector receiving unit according to the present invention;
fig. 4 is a schematic diagram of a geophone according to the present invention.
1-a ground sound vector receiving unit, 2-a water sound vector receiving unit, 3-a water sound scalar receiving unit, 4-a bottom plate, 5-an isolating layer, 6-a supporting structure, 7-a sound decoupling cavity, 8-an elastic structure, 9-a supporting structure, 10-a water sound coupling layer, 11-a sound transmission layer, 12-a preposed conditioning circuit, 13-a hanging structure, 14-an upper cover plate, 15-a piezoelectric circular tube, 16-a top cover plate, 17-a sealing cover plate, 18-a one-way oil-resistant sealing valve, 19-a spring, 20-a first hanging hook, 21-an oil filling port, 22-silicon oil, 23-an oil seal, 24-a water sound scalar output signal line, 25-a water sound vector output signal line, 26-a ground sound vector output signal line and 27-an output line, 28-watertight connector, 29-built-in inertial sensor, 30-positioning structure, 31-pressure-resistant shell, 32-cable head, 33-built-in accelerometer, 34-positioning substrate, 35-shell and 36-second suspension hook.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely explained below with reference to the drawings in the embodiments of the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict, and the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments.
Referring to fig. 1-4 to illustrate the present embodiment, a bottom-sitting vector sensor for receiving underwater acoustic signals includes a ground acoustic vector receiving unit 1, an underwater acoustic vector receiving unit 2 and an underwater acoustic scalar receiving unit 3, the ground acoustic vector receiving unit 1 is mounted on a bottom plate 4 and located in an acoustic decoupling cavity 7, the underwater acoustic vector receiving unit 2 is located above the underwater acoustic scalar receiving unit 3 and located outside the acoustic decoupling cavity 7, a frame is mounted on the bottom plate 4, the ground acoustic vector receiving unit 1, the underwater acoustic vector receiving unit 2 and the underwater acoustic scalar receiving unit 3 are all located in the frame, a hanging structure 13 is mounted on the frame, the frame and the ground acoustic vector receiving unit 1, the underwater acoustic vector receiving unit 2 and the underwater acoustic scalar receiving unit 3 are provided with an acoustic transmission layer 11, a front conditioning circuit 12 is mounted in the acoustic decoupling cavity 7, the acoustic decoupling cavity 7 includes an isolation layer 5 and a partition plate 6 located on the acoustic transmission layer 11, the isolation layer 5 is installed on the bottom plate 4 and is located the outside of the earth sound vector receiving unit 1, the upper end of the isolation layer 5 is connected with the partition plate 6, and the preposed conditioning circuit 12 is installed at the lower end of the partition plate 6.
The method comprises the steps of installing a ground sound vector receiving unit 1 on a base plate 4, marking orthogonal X/Y directions, installing an isolation layer 5 on the base plate 4 to enable the sensor to have certain strength, sealing the sensor in a radial sealing mode, installing a preposed conditioning circuit 12 on a partition plate 6, sealing the partition plate 6 and the isolation layer 5 in an axial sealing mode, receiving ground sound signals of seabed signals through the ground sound vector receiving unit 1, receiving underwater mass point vector signals through a hydroacoustic vector receiving unit 2, receiving underwater scalar sound pressure signals through the hydroacoustic scalar receiving unit 3, receiving ground sound vectors and the hydroacoustic vector signals through the ground sound vector receiving unit 1 and the hydroacoustic vector receiving unit 2, realizing the integrity of information quantity on a frequency domain and being beneficial to the detection of low-frequency targets, enabling the base plate 4 to be the base of the hydroacoustic vector sensor, enabling the inner side to be rigidly connected with the ground sound vector receiving unit 1, the outer side of the underwater acoustic vector receiving unit is in contact with the seabed, the shape, the material and the structure of the underwater acoustic vector receiving unit are designed according to the geological characteristics of the seabed, the underwater acoustic vector receiving unit is in stable contact with the seabed as far as possible, the strong coupling effect is achieved, the ground acoustic signal propagation efficiency is improved, a sealing cavity is formed by the partition plate 6 and the bottom plate 4, an acoustic decoupling cavity 7 is provided for the ground acoustic vector receiving unit 1, a supporting structure is provided for the underwater acoustic vector receiving unit 2 and the underwater acoustic scalar receiving unit 3, the interior of the acoustic decoupling cavity 7 is vacuum, the underwater acoustic signal is isolated from being coupled to the ground acoustic vector receiving unit 1, the acoustic coupling area is reduced, and the signal of the ground acoustic vector receiving unit 1 only comes from the seabed ground acoustic channel as far as possible; the signals collected by the ground sound vector receiving unit 1, the underwater sound vector receiving unit 2 and the underwater sound scalar receiving unit 3 are transmitted out through the preposed conditioning circuit 12, and the preposed conditioning circuit 12 can comprise a preposed amplifying and filtering module, so that the sensor has low output impedance and high output signal-to-noise ratio, the working stability of the sensor is improved, and the whole sensor is provided with a hoisting structure 13, so that a hoisting rope of the underwater sound vector sensor and a laying and recycling facility of a releaser are convenient to install.
Wherein, the sound-transmitting layer 11 is formed by pouring polyurethane, and the frame is of a birdcage structure.
Referring to fig. 1-4 to illustrate the embodiment, a supporting structure 9 is installed at the upper end of the partition board 6, the underwater acoustic vector receiving unit 2 is installed in the supporting structure 9 through an elastic structure 8, the elastic structure 8 comprises 8 springs 19, the springs 19 are connected with the supporting structure 9 through first hanging hooks 20, an underwater acoustic coupling layer 10 is arranged on the outer surface of the supporting structure 9, the underwater acoustic vector receiving unit 2 is hung on the supporting structure 9 through the springs 19, the supporting structure 9 is a thin-walled circular tube made of epoxy resin, 8 first hanging hooks 20 are embedded inside the supporting structure and connected with the springs 19, and water tightness is achieved through sealant.
The elastic structure 8 is provided to structurally mount or support the underwater acoustic vector receiving unit 2, and to provide restoring force to the underwater acoustic vector receiving unit 2, so that the underwater acoustic vector receiving unit can be maintained at a balanced position under the disturbance of acoustic waves. The design of the elastic structure 8 influences the frequency range of the underwater sound vector receiving unit 2, conventional flexible elements such as springs and rubber bands can be selected, and rubber springs or complex structures can be designed according to requirements.
The supporting structure 9 provides support for the elastic structure 8, and has good vibration isolation characteristics, so that the energy transmitted by the earth sound signal to the underwater sound vector receiving unit 2 through the bottom plate 4, the isolation layer 5 and the partition plate 6 is as low as possible, and a decoupling effect is achieved; the underwater acoustic coupling layer 10 is to make the underwater acoustic signal propagate in the underwater acoustic coupling layer without loss as much as possible; the second is to provide a medium density matched to that of the underwater acoustic vector receiving unit 2 so that the underwater acoustic vector receiving unit 2 can achieve or approach neutral buoyancy therein.
The acoustic transmission layer 11 is acoustically matched with the acoustic impedance of seawater, so that on one hand, an underwater acoustic signal propagation medium is provided, and the underwater acoustic waves are ensured to enter the underwater acoustic coupling layer 10 without attenuation or with low attenuation; has certain strength in structure, and has the characteristics of waterproofness, seawater corrosion resistance, water permeability and the like.
Referring to fig. 1-4 to illustrate the present embodiment, a sealing cover plate 17 is disposed on the partition plate 6, a one-way oil-proof sealing valve 18 is disposed on the sealing cover plate 17, and a vacuum layer is formed inside the bottom plate 4, the isolation layer 5 and the partition plate 6 by performing a vacuum process through the one-way oil-proof sealing valve 18.
With reference to fig. 1-4 to illustrate the present embodiment, the underwater sound scalar receiving unit 3 includes an upper cover plate 14, a circular piezoelectric tube 15 and a top cover plate 16, which are mounted on the upper end of the supporting structure 9, the circular piezoelectric tube 15 is mounted between the upper cover plate 14 and the top cover plate 16, an oil filling port 21 is provided on the upper cover plate 14, and an oil seal 23 is provided at the oil filling port 21. After the upper cover plate 14 is connected with the supporting structure 9, the sealing glue is used for water tightness, after the glue is solidified, silicon oil 22 is filled into the inside through the oil filling hole 21, and finally the oil seal 23 is used for sealing.
Referring to fig. 1-4 to explain the present embodiment, an underwater sound scalar output signal line 24 is connected to the output end of the piezoelectric circular tube 15, an underwater sound vector output signal line 25 is connected to the output end of the underwater sound vector receiving unit 2, a ground sound vector output signal line 26 is connected to the output end of the ground sound vector receiving unit 1, the output ends of the underwater sound scalar output signal line 24, the output end of the underwater sound vector output signal line 25 and the output end of the ground sound vector output signal line 26 are all connected to the pre-conditioning circuit 12, and the pre-conditioning circuit 12 is connected to a watertight connector 28 through an output line 27. The underwater sound vector receiving unit 2 transmits the vector signal to the pre-conditioning circuit 12 through an underwater sound vector output signal line 25, the underwater sound scalar receiving unit 3 transmits the scalar signal to the pre-conditioning circuit 12 through an underwater sound scalar output signal line 24, the ground sound vector receiving unit 1 transmits the ground sound vector signal to the pre-conditioning circuit 12 through a ground sound vector output signal line 26, and then the pre-conditioning circuit 12 transmits the signal to the watertight connector 28 through an output line 27.
The present embodiment is described with reference to fig. 1-4, the earth-sound vector receiving unit 1 includes three built-in inertial sensors 29, a positioning structure 30 and a pressure-resistant housing 31, the built-in inertial sensors 29 are mounted on the positioning structure 30, the positioning structure 30 is connected with the pressure-resistant housing 31, and a cable head 32 is arranged outside the pressure-resistant housing 31.
Installing 3 built-in inertial sensors 29 on a positioning structure 30 in a pairwise orthogonal mode, wherein the built-in inertial sensors 29 can be displacement sensors, vibration velocity sensors or accelerometers and are ordered according to frequency and index requirements; the positioning structure 30 is rigidly connected with the pressure-resistant shell 31 by bolts, and the cable head 32 is connected with the shell 31 in a watertight manner by laser welding.
Referring to fig. 1-4 to illustrate the present embodiment, the underwater acoustic vector receiving unit 2 comprises three built-in accelerometers 33, two by two orthogonal built-in accelerometers, a positioning substrate 34 and a housing 35, wherein the built-in accelerometers 33 are mounted on the positioning substrate 34, the positioning substrate 34 is mounted in the housing 35, and the housing 35 is connected with a spring 19 through a second suspension hook 36.
Mounting 3 built-in accelerometers 33 on a positioning substrate 34 in a pairwise orthogonal mode, wherein the frequency band range of the built-in accelerometers 33 is generally higher than that of the built-in inertial sensors 29 in the earth sound vector receiving unit 1; the positioning base plate 34 is placed in the housing 35 at a proper position, and 8 second hanging hooks 36 are attached to the housing for hanging the underwater acoustic vector receiving unit 2.
The embodiments of the invention disclosed above are intended to be merely illustrative. The examples are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention.
Claims (10)
1. A bottom-seated vector sensor for underwater acoustic signal reception, comprising: including earth sound vector receiving element (1), underwater sound vector receiving element (2) and underwater sound scalar receiving element (3), earth sound vector receiving element (1) is installed on bottom plate (4) and is located sound decoupling zero chamber (7), underwater sound vector receiving element (2) are located underwater sound scalar receiving element (3) top and are located sound decoupling zero chamber (7) outside, install the frame on bottom plate (4), earth sound vector receiving element (1), underwater sound vector receiving element (2) and underwater sound scalar receiving element (3) all are located the frame, install on the frame and hang and put structure (13), frame and earth sound vector receiving element (1), underwater sound vector receiving element (2) and underwater sound scalar receiving element (3) are equipped with sound-transparent layer (11).
2. The submersible vector sensor for underwater acoustic signal reception of claim 1, wherein: a preposed conditioning circuit (12) is arranged in the sound decoupling cavity (7).
3. The submersible vector sensor for underwater acoustic signal reception of claim 2, wherein: the acoustic decoupling cavity (7) comprises an isolation layer (5) and a partition plate (6) which are located on an acoustic transmission layer (11), the isolation layer (5) is installed on the bottom plate (4) and located on the outer side of the earth sound vector receiving unit (1), the upper end of the isolation layer (5) is connected with the partition plate (6), and the preposed conditioning circuit (12) is installed at the lower end of the partition plate (6).
4. The submersible vector sensor for underwater acoustic signal reception of claim 3, wherein: supporting structure (9) are installed to baffle (6) upper end, underwater sound vector receiving unit (2) are installed in supporting structure (9) through elastic construction (8), elastic construction (8) include 8 spring (19), spring (19) link to each other through first suspension hook (20) with supporting structure (9), supporting structure (9) surface is equipped with underwater sound coupled layer (10).
5. The submersible vector sensor for underwater acoustic signal reception of claim 3, wherein: and a sealing cover plate (17) is arranged on the partition plate (6), and a one-way oil-resistant sealing valve (18) is arranged on the sealing cover plate (17).
6. The submersible vector sensor for underwater acoustic signal reception of claim 4, wherein: the underwater sound scalar receiving unit (3) comprises an upper cover plate (14), a piezoelectric circular tube (15) and a top cover plate (16), wherein the upper cover plate (14), the piezoelectric circular tube (15) and the top cover plate (16) are installed at the upper end of a supporting structure (9), and the piezoelectric circular tube (15) is installed between the upper cover plate (14) and the top cover plate (16).
7. The submersible vector sensor for underwater acoustic signal reception of claim 6, wherein: an oil filling opening (21) is formed in the upper cover plate (14), an oil seal (23) is arranged at the position of the oil filling opening (21), and silicone oil (22) is filled in the supporting structure (9).
8. The submersible vector sensor for underwater acoustic signal reception of claim 6, wherein: the piezoelectric round tube (15) output is connected with an underwater sound scalar output signal line (24), the underwater sound vector receiving unit (2) output is connected with an underwater sound vector output signal line (25), the earth sound vector receiving unit (1) output is connected with an earth sound vector output signal line (26), the underwater sound scalar output signal line (24), the underwater sound vector output signal line (25) and the earth sound vector output signal line (26) output are all connected with a preposed conditioning circuit (12), the preposed conditioning circuit (12) is connected with a watertight connector (28) through an output line (27), and the watertight connector (28) is installed at the side end of the bottom plate (4).
9. The submersible vector sensor for underwater acoustic signal reception of claim 1, wherein: the earth sound vector receiving unit (1) comprises three built-in inertial sensors (29), a positioning structure (30) and a pressure-resistant shell (31), wherein the built-in inertial sensors (29) are orthogonal in pairs, the positioning structure (30) is installed on the positioning structure (30), the positioning structure (30) is connected with the pressure-resistant shell (31), and a cable head (32) is arranged outside the pressure-resistant shell (31).
10. The submersible vector sensor for underwater acoustic signal reception of claim 4, wherein: the underwater sound vector receiving unit (2) comprises three built-in accelerometers (33), a positioning base plate (34) and a shell (35), wherein the built-in accelerometers (33) are orthogonal in pairs, the positioning base plate (34) is installed on the positioning base plate (34), the positioning base plate (34) is installed in the shell (35), and the shell (35) is connected with a spring (19) through a second suspension hook (36).
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| US20120294123A1 (en) * | 2011-05-17 | 2012-11-22 | Qingyu You | Combined broadband ocean bottom seismograph with single glass sphere |
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