Semi-self-capacitance hydrophone synchronous array based on signal receiving and transmitting of load-bearing leaky cable

Abstract

The present invention discloses a semi-self-contained hydrophone synchronous array based on receiving and transmitting signals through a load-bearing leaky cable. The present invention utilizes the principle that a specially designed load-bearing leaky cable radiates electromagnetic waves to transmit control signals such as clock signals; at the semi-self-contained hydrophone end, a variable dielectric receiving antenna is adopted for signal reception, so as to realize synchronous reception of deep-sea vertical array acoustic signals within a large depth range. In addition to transmitting control signals such as clock signals, the hydrophone data can also be uploaded to the main control electronic bin for storage through the load-bearing leaky cable, improving the reliability of data acquisition. The synchronous acquisition accuracy of the acoustic signals achieved by the semi-self-contained hydrophone synchronous array of the present invention can reach 10 μS, and can cover up to 2000 m in the deep sea at most. The semi-self-contained hydrophones of the present invention can be arranged in a half-wavelength pattern or any nested pattern at any frequency.

Description

Technical Field

[0001] The present invention belongs to a semi-self-contained hydrophone in the field of deep-sea ocean acoustic environment, background field and target acoustic feature detection and monitoring, and particularly relates to a semi-self-contained hydrophone synchronous array based on a load-bearing leaky cable for transmitting and receiving signals. Background Art

[0002] At present, the acoustic method is still the main means for research such as deep-sea acoustic propagation, deep-sea background field observation, deep-sea channel feature acquisition, underwater target detection, and deep-sea long-distance communication. Whether it is the requirement for resolving the ray arrival multipath structure in the deep-sea acoustic tomography experiment or the requirement for the detection depth of underwater targets in the deep-sea vertical array, these all pose very high requirements for the synchronous acquisition accuracy between each hydrophone array element in the deep-sea vertical array. Only when the synchronous acquisition accuracy between each hydrophone array element in the deep-sea vertical array meets the expected requirements can a higher array gain be obtained, thereby improving the detection accuracy and range of the vertical array. For example, in the acoustic tomography experiment, according to the experience that the difference in multipath arrival times is between 10mS - 20mS, the synchronous error between each hydrophone should be less than at least one order of magnitude of this value. Therefore, the 30-day synchronous error between each hydrophone is required to be within 1 - 2mS; in the application of underwater target detection, such as the detection of the target horizontal azimuth by a towed array and the detection of the target vertical depth by a vertical array, the synchronous accuracy between each hydrophone is required to be within 20μS.

[0003] In order to achieve synchronous acquisition of acoustic signals in a deep-sea vertical array, the following solutions are mainly adopted at present:

[0004] The solution of using an oil-filled array hydrophone for acquisition uses a single clock for synchronous acquisition to effectively solve the synchronous accuracy problem. However, the array hydrophone generally needs to be arranged according to the half-wavelength of the highest detection frequency within the array aperture range. Taking a detection frequency of 1kHz as an example, the spacing for half-wavelength arrangement is 0.75 meters. To cover a large depth range in the deep sea, the number of hydrophones required is huge. Although all hydrophones can be powered by the same wire, each hydrophone still requires a separate signal wire for data acquisition. Although segmented acquisition can be used to reduce the number of wires, the huge number of hydrophones will still greatly increase the diameter of the array. In a large depth range, the increased scale is unacceptable.

[0005] Since the increased scale of the oil-filled array hydrophone mainly comes from its wires, distributing the functions of clock signal, power supply, acquisition, and storage to each hydrophone element to make a fully self-contained hydrophone has become the choice for many large-scale vertical array designs (i.e., eliminating the wires). However, the requirement for each hydrophone to have a clock source greatly increases the absolute timing accuracy requirement for each clock source. To achieve high-precision synchronous acquisition among hydrophones, high-precision atomic clocks are often needed, but the increased power consumption of high-precision atomic clocks significantly reduces the continuous working time of the fully self-contained hydrophone, or only by increasing its battery capacity can a large-scale be achieved to realize long-term equipment monitoring, which is also unacceptable in practical applications such as underwater target detection.

[0006] A compromise solution is to use a steel-clad cable combined with an electromagnetic induction coupling coil, or fix a small-sized electromagnetic induction synchronous cable on the load-bearing rope to directly transmit the clock signal to the self-contained hydrophone, while the power supply, acquisition, and storage are solved by the hydrophone itself. This method balances the contradictions such as the increased scale brought by high-precision synchronous acquisition to a certain extent, but there are still other problems to a certain extent. For example, for the magnetic induction coupling transmission of the steel-clad cable, a long-distance solid steel cable needs to be used. In the deep sea covering several thousand meters, the weight of the solid steel cable will cause a large increase in the required buoyancy material. At the same time, the plastic coating material of the solid steel cable cannot be damaged, otherwise the steel cable will be corroded by seawater and break, which is not suitable for long-term deployment. Using the method of fixing a small-sized synchronous cable on the load-bearing rope will also bring complex and cumbersome processes during the deployment and recovery of a large-depth vertical array. The cable may be entangled with the load-bearing rope or break due to ocean current action, resulting in the failure of synchronous acquisition.

[0007] Therefore, it is necessary to propose a better hydrophone synchronous array. Summary of the Invention

[0008] To solve the problems and requirements in the background technology, the present invention proposes a semi-self-contained hydrophone synchronous array based on a load-bearing leaky cable for signal transceiver. The present invention uses the principle of a leaky coaxial cable radiating electromagnetic waves to transmit control signals such as clock signals; at the semi-self-contained hydrophone end, a variable dielectric receiving and transmitting antenna is used to receive signals, thereby realizing synchronous reception and transmission of acoustic signals in a deep-sea vertical array within a large depth range. The semi-self-contained hydrophone synchronous array proposed by the present invention is an array-type synchronous array that can solve acoustic signals under conditions such as ocean ambient noise, target acoustic signals, or acoustic propagation experiments in a large depth range. The present invention can be applied to acoustic data synchronous acquisition scenarios such as deep-sea ocean environment surveys, dynamic environment monitoring, and acoustic target detection.

[0009] The technical solution of the present invention is as follows:

[0010] A semi-self-capacitance hydrophone synchronous array for receiving and transmitting signals based on a load-bearing leaky cable includes a main control electronic cabin, a main connection component, a load-bearing leaky cable, and a number of semi-self-capacitance hydrophones. One end of the main control electronic cabin is connected to the load-bearing leaky cable through the main connection component, and a number of semi-self-capacitance hydrophones are fixedly installed on the outside of the load-bearing leaky cable at intervals from top to bottom.

[0011] The main control electronic cabin includes a chip-level clock source, a main matching module, a main signal generation module, a main modulation and demodulation module, an electronic cabin acquisition and storage module, a duty and main control circuit, an electronic cabin battery pack, a debugging port, and a timing port; the debugging port and the timing port are provided on the chip-level clock source, the chip-level clock source is connected to the duty and main control circuit, the duty and main control circuit is connected to the main signal generation module and the main modulation and demodulation module, the main modulation and demodulation module is connected to the main matching module, the electronic cabin acquisition and storage module is connected to the duty and main control circuit, and the main modulation and demodulation module is connected to the load-bearing leaky cable through the main connection component; the electronic cabin battery pack is connected to the duty and main control circuit.

[0012] A lifting ring for the main control electronic cabin is further provided on the cabin body of the main control electronic cabin.

[0013] The main connection component includes a connecting piece, a connecting cable, and a load-bearing tow head. The top of the connecting piece is fixedly connected to the bottom of the cabin body of the main control electronic cabin, a load-bearing tow head is fixedly installed at the bottom of the connecting piece, the connecting cable is connected to the load-bearing leaky cable through the load-bearing tow head, and the connecting cable is connected to the main control electronic cabin.

[0014] A hanging ear is further provided on the bottom tray of the connecting piece.

[0015] The load-bearing leaky cable includes an inner conductor, a dielectric layer, an outer conductor, a watertight layer, a load-bearing layer, and an outer protective layer that are laminated in sequence from inside to outside; a number of slot holes are opened in the outer conductor for radiating signals.

[0016] The load-bearing layer is made of Kevlar fiber.

[0017] Each of the semi-self-contained hydrophones includes an insulating polyurethane dielectric layer, a receiving and transmitting antenna, a fastener, a slave matching module, a slave modulation and demodulation module, a slave signal generation module, a hydrophone acquisition and storage module, a hydrophone battery pack, a pressure-resistant housing, a mounting bracket, a hydrophone, and a slave duty and main control circuit; the pressure-resistant housing is fixedly installed at the load-bearing leaky cable through the mounting bracket, and the slave matching module, the slave modulation and demodulation module, the slave signal generation module, the hydrophone acquisition and storage module, the hydrophone battery pack, and the slave duty and main control circuit are installed inside the pressure-resistant housing. The slave duty and main control circuit is connected to the hydrophone acquisition and storage module, the slave duty and main control circuit is connected to the hydrophone, the slave matching module is connected to the slave duty and main control circuit after passing through the slave modulation and demodulation module and the slave signal generation module in sequence, the slave matching module is connected to the receiving and transmitting antenna, and the hydrophone battery pack is connected to the slave duty and main control circuit; the receiving and transmitting antenna is arranged inside the insulating polyurethane dielectric layer, the receiving and transmitting antenna is fixedly connected to the insulating polyurethane dielectric layer through the fastener, and the load-bearing leaky cable and the receiving and transmitting antenna are arranged at intervals.

[0018] The distance between the load-bearing leaky cable and the receiving and transmitting antenna is set to be 5 cm - 10 cm.

[0019] The top of the main control electronic bin is connected to the corresponding load-bearing leaky cable through the corresponding main connection component. A number of semi-self-contained hydrophones are fixedly installed outside the load-bearing leaky cable at intervals from top to bottom. That is, the load-bearing leaky cables and the semi-self-contained hydrophones are symmetrically installed on both sides of the main control electronic bin, and each side forms a receiving array. Each receiving array supports synchronous transmission up to 1000 meters. Therefore, the semi-self-contained hydrophone synchronous array proposed by the present invention can form a coverage of 2000 m in the deep sea.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention adopts a load-bearing leaky cable. Under the condition of low power consumption, the signal transmission loss is 29 dB / km. Considering the process factors, the load-bearing leaky cable on one side of the main control electronic bin can be made into a length of 1000 m, and the main control electronic bin is arranged in the middle of two 1000 m load-bearing leaky cables. Therefore, the semi-self-contained hydrophone synchronous array proposed by the present invention can form a coverage of 2000 m in the deep sea; different lengths of load-bearing leaky cables can also be made according to specific sea depth requirements for shallow water deployment.

[0022] 2. Within the range of the load-bearing leaky cable, only one clock signal is sent to all the hydrophones of the present invention, and its synchronous acquisition accuracy can reach within 10 μS. The acquired acoustic signals can be used for beamforming of the vertical array, and the detection accuracy and range are improved.

[0023] 3. In addition to the issued clock signal, the present invention can also upload the hydrophone data to the main control electronic cabin for storage through the load-bearing leaky cable, achieving local and host computer backup storage of the hydrophone and improving the reliability of data acquisition.

[0024] 4. The load-bearing leaky cable adopted by the present invention can be slotted at equal intervals, and the slotting positions are engraved on the outer surface of the load-bearing leaky cable. The semi-self-contained hydrophone can be arranged in a half-wavelength array or any nested array at the load-bearing leaky cable at any frequency.

[0025] 5. The diameter of the load-bearing leaky cable adopted by the present invention is within 15 mm, the maximum load-bearing capacity is 4 t, the density is close to that of seawater, it is relatively light, and there are no other components except the cable. The load-bearing leaky cable can be laid and recovered manually or by winch equipment, which is relatively convenient. The load-bearing leaky cable proposed by the present invention adopts double watertightness and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of a semi-self-contained hydrophone synchronous array that transmits and receives signals based on a load-bearing leaky cable.

[0027] Figure 2 is a schematic diagram of the structure of a load-bearing leaky cable.

[0028] Figure 3 is a schematic diagram of the structure of a semi-self-contained hydrophone and a load-bearing leaky cable.

[0029] Figure 4 is a schematic diagram of the communication between the receiving and transmitting antennas in a semi-self-contained hydrophone and a load-bearing leaky cable.

[0030] Figure 5 is a control framework diagram of a semi-self-contained hydrophone synchronous array that transmits and receives signals based on a load-bearing leaky cable.

[0031] In the figure: master control electronic bin lifting ring 1, debugging port 2, time service port 3, master control electronic bin 4, chip-level clock source 5, main matching module 6, main signal generating module 7, main modulation and demodulation module 8, electronic bin acquisition and storage module 9, main duty and master control circuit 10, electronic bin battery pack 11, connecting piece 12, connecting cable 13, load-bearing tow head 14, insulating polyurethane dielectric layer 15, semi-self-contained hydrophone 16, load-bearing leaky cable 17, hanging ear 18, load-bearing structure 19, inner conductor 20, dielectric layer 21, slot hole 22, outer conductor 23, watertight layer 24, load-bearing layer 25, outer protective layer 26, embedded nut 27, screw 28, pressing block 29, receiving and transmitting antenna 30, connector 31, slave matching module 32, slave modulation and demodulation module 33, slave signal generating module 34, hydrophone acquisition and storage module 35, hydrophone battery pack 36, pressure-resistant housing 37, mounting bracket 38, hydrophone 39, hydrophone protective shell 40, slave duty and master control circuit 41, leakage signal 42, transmitted signal 43. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those of ordinary skill in the art to which the present invention pertains. The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a", "an" or "the" do not denote a quantity limitation, but mean that there is at least one. The terms such as "comprising" or "including" mean that the elements or items appearing before this term cover the elements or items listed after this term and their equivalents, without excluding other elements or items. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0034] As Figure 1 and Figure 5As shown in the figure, the semi-self-contained hydrophone synchronization array proposed by the present invention includes a main control electronic cabin 4, a main connection component, a load-bearing leakage cable 17, and a number of semi-self-contained hydrophones 16. The bottom of the main control electronic cabin 4 is connected to the load-bearing leakage cable 17 through the main connection component. A number of semi-self-contained hydrophones 16 are fixedly installed outside the load-bearing leakage cable 17 and are arranged at intervals from top to bottom in an array form, and multiple semi-self-contained hydrophones 16 are arranged in sequence along the axial direction of the load-bearing leakage cable 17.

[0035] The main control electronic cabin 4 includes a chip-level clock source 5, a main matching module 6, a main signal generation module 7, a main modulation and demodulation module 8, an electronic cabin acquisition and storage module 9, a main duty and main control circuit 10, an electronic cabin battery pack 11, a debugging port 2, and a timing port 3. A main control electronic cabin lifting ring 1 is also provided at the top of the cabin body of the main control electronic cabin 4. Load-bearing structures 19 that can be used for mooring can be arranged on both the main control electronic cabin lifting ring 1 and the end of the load-bearing leakage cable. Therefore, this device can be deployed in the form of a moored buoy alone, or can be used as a part of the moored buoy and combined with other devices to form a more complex moored buoy for deployment. Inside the cabin, a chip-level clock source 5, a main matching module 6, a main signal generation module 7, a main modulation and demodulation module 8, an electronic cabin acquisition and storage module 9, a main duty and main control circuit 10, and an electronic cabin battery pack 11 are installed. The chip-level clock source 5 is provided with a debugging port 2 and a timing port 3. Its link interface uses a rubber connector. The communication protocol is that the debugging cable uses network transmission, and the timing signal uses TTL level transmission. Among them, the timing cable is mainly responsible for sending the time base signal to the chip-level clock source 5 inside the main control electronic cabin 4, and the debugging cable is mainly used for setting the launch task and reading the collected data. The chip-level clock source 5 is connected to the main duty and main control circuit 10. The main duty and main control circuit 10 is connected to the main signal generation module 7 and the main modulation and demodulation module 8. The main modulation and demodulation module 8 is connected to the main matching module 6. The electronic cabin acquisition and storage module 9 is connected to the main duty and main control circuit 10. The main modulation and demodulation module 8 is connected to the load-bearing leakage cable 17 through the main connection component. The electronic cabin battery pack 11 is directly connected to the main duty and main control circuit 10, and powers the main matching module 6, the main signal generation module 7, the main modulation and demodulation module 8, and the electronic cabin acquisition and storage module 9 through the main duty and main control circuit 10. Among them, the chip-level clock source 5 is used to generate high-precision clock signals. The main signal generation module 7 is used for encoding and generating clock signals. The main modulation and demodulation module 8 is used for modulating the clock signals and sending them to the main matching module 6 for signal transmission. The electronic cabin acquisition and storage module 9 is used for storing the information sent by the hydrophones, and these signals include but are not limited to the state information of the hydrophones, time-domain acoustic signal information, and preprocessed spectrum information, etc. After the settings are completed, the chip-level clock source 5 and the main duty and main control circuit 10 are always in a working state, and the remaining devices such as the main signal generation module 7, the main modulation and demodulation module 8, the main matching module 6, and the electronic cabin acquisition and storage module 9 enter the sleep state.

[0036] The main connection assembly includes a connection piece 12, a connection cable 13 and a load-bearing tug 14. The top of the connection piece 12 is fixedly connected to the bottom of the main control electronic compartment 4. The load-bearing tug 14 is fixedly installed in the bottom of the connection piece 12. The connection cable 13 is connected to the load-bearing leakage cable 17 through the load-bearing tug 14. The connection cable 13 is connected to the main modem module 8 of the main control electronic compartment 4. A hanging ear 18 is also provided on the bottom tray of the connection piece 12 for mounting the connection protection rope during deployment.

[0037] like Figure 2 As shown, the load-bearing leakage cable 17 is a leakage cable with load-bearing capacity. The load-bearing leakage cable 17 includes an inner conductor 20, a dielectric layer 21, an outer conductor 23, a watertight layer 24, a load-bearing layer 25 and an outer protective layer 26, which are stacked from the inside to the outside; a plurality of slots 22 are provided in the outer conductor 23, and two adjacent slots 22 are in an eight-shaped shape, which are used to radiate signals, i.e., electromagnetic waves. A signal field strength is formed in the outer space of the cable, and the leakage cable can propagate electromagnetic waves along the axial direction of the cable, and can also propagate electromagnetic waves radially, so as to realize the transmission of clock and control signals. In a specific implementation, the load-bearing leakage cable 17 is a coaxial cable, and a plurality of slots 22 arranged in sequence along the axial direction of the cable are provided in the outer conductor 23 near each semi-self-contained hydrophone 16, and no slots 22 are provided in the outer conductor 23 at other locations. The inner conductor and the outer conductor are made of copper, the dielectric layer is made of polytetrafluoroethylene, and the watertight layer and the outer protective layer are both made of rubber. The bearing layer 25 is made of Kevlar fiber. In addition to having high tensile strength, Kevlar fiber has relatively small elongation, which can effectively protect the cable from being pulled and damaged by the heave force when it is deployed in a large area in the deep sea. Both the watertight layer and the outer protective layer have watertight functions, realizing double watertight protection.

[0038] Since the leaking cable is slotted at a fixed interval, the semi-self-contained hydrophone can be arranged at any distance on the leaking cable through a variable dielectric receiving and transmitting antenna structure, or arranged according to the half wavelength of the detection frequency according to the distance mark on the surface of the leaking cable, and the array form is flexible. The present invention solves the problem that the position of the oil-filled array or the vulcanized branch cable hydrophone is fixed and cannot be changed.

[0039] like Figure 3As shown in the figure, each semi-self-contained hydrophone 16 includes an insulating polyurethane dielectric layer 15, a receiving and transmitting antenna 30, fasteners, a connector 31, a slave matching module 32, a slave modulation and demodulation module 33, a slave signal generation module 34, a hydrophone acquisition and storage module 35, a hydrophone battery pack 36, a pressure-resistant housing 37, a mounting bracket 38, a hydrophone 39, a hydrophone protection case 40, a temperature-compensated crystal oscillator, and a slave duty and master control circuit 41; the pressure-resistant housing 37 is fixedly installed at the load-bearing leaky cable 17 through the mounting bracket 38 and fasteners. Inside the pressure-resistant housing 37, there are installed a slave matching module 32, a slave modulation and demodulation module 33, a slave signal generation module 34, a hydrophone acquisition and storage module 35, a hydrophone battery pack 36, and a slave duty and master control circuit 41. The slave duty and master control circuit 41 is connected to the hydrophone acquisition and storage module 35 and the temperature-compensated crystal oscillator. The slave duty and master control circuit 41 is connected to the hydrophone 39 installed inside the hydrophone protection case 40, and an ordinary crystal oscillator is used in the hydrophone 39. The slave matching module 32 is connected to the slave duty and master control circuit 41 after passing through the slave modulation and demodulation module 33 and the slave signal generation module 34 in sequence. The slave matching module 32 is connected to the receiving and transmitting antenna 30 through the connector 31, and the hydrophone battery pack 36 is connected to the slave duty and master control circuit 41; the receiving and transmitting antenna 30 is arranged inside the insulating polyurethane dielectric layer 15, and the receiving and transmitting antenna 30 is fixedly connected to the insulating polyurethane dielectric layer 15 through fasteners. The load-bearing leaky cable 17 and the receiving and transmitting antenna 30 are arranged at intervals and in parallel, and the distance between the load-bearing leaky cable 17 and the receiving and transmitting antenna 30 is set to 5 cm - 10 cm. The insulating polyurethane dielectric layer 15 and the receiving and transmitting antenna 30 form a variable-dielectric receiving antenna. The variable-dielectric receiving and transmitting antenna mainly solves the problem that the electromagnetic signal radiated by the leaky cable in the marine environment is easily absorbed by seawater. The electromagnetic signal of the load-bearing leaky cable is transmitted to the receiving and transmitting antenna inside the polyurethane material, realizing the cross-seawater medium transmission between the leaky signal and the hydrophone. Among them, the fasteners are specifically embedded nuts 27, screws 28, and pressing blocks 29. A number of embedded nuts 27 are arranged inside one side of the insulating polyurethane dielectric layer 15, and the pressing block 29 cooperates with the embedded nut 27 through the screw 28, so that the load-bearing leaky cable 17 is fixed on one side of the insulating polyurethane dielectric layer 15. The communication schematic diagram between the receiving and transmitting antenna and the load-bearing leaky cable is as shown in Figure 4As shown, the load-bearing leaky cable generates a leak signal 42, and the receiving and transmitting antenna 30 generates a transmission signal 43. The signal is transmitted through the variable dielectric layer formed by the insulating polyurethane dielectric layer 15, that is, a wireless signal transmission channel with variable dielectric is established between the load-bearing leaky cable and the receiving and transmitting antenna 30 to complete the uplink and downlink transmission of data. A time base signal is generated from the duty and main control circuit 41. The semi-self-capacitance hydrophone is also set using a debugging cable. Here, the work plan list of the semi-self-capacitance hydrophone needs to be set to be the same as that of the main control electronic bin. After the setting is completed, the duty and main control circuit 41 is in the working state, and the rest, such as the slave signal generation module 34, the slave modulation and demodulation module 33, the matching module 32, the hydrophone acquisition and storage module 35, and the electronic bin acquisition and storage module 9, enter the sleep state.

[0040] The present invention uses the principle of radiating electromagnetic waves by a specially designed load-bearing leaky cable to transmit control signals such as clock signals; at the semi-self-capacitance hydrophone end, a variable dielectric receiving antenna is used to receive signals, so as to realize the synchronous reception of deep-sea vertical array acoustic signals within a large depth range. In addition, the vertical array acoustic signal data received by the semi-self-capacitance hydrophone is stored locally, and the data is transmitted to the main control electronic bin through the load-bearing leaky cable via the variable dielectric receiving antenna for storage to complete the backup.

[0041] The working process of the semi-self-capacitance hydrophone synchronous array proposed by the present invention is as follows:

[0042] Through the time synchronization of the deck unit, the time reference of the chip-level clock source 5 is obtained. The main duty and main control circuit 10 sleeps during non-working hours and wakes up 1 minute before working hours to read the time reference signal. After modulating the time reference signal, it is sent by the main matching module 6 and the load-bearing leaky cable, and the transmission frequency is not less than 1 Hz. There is also a duty circuit set inside the semi-self-capacitance hydrophone. This value can be changed according to the long-term timekeeping accuracy of the temperature-compensated crystal oscillator 1 minute before work. After determining the wake-up, it starts to read the time reference signal transmitted by the load-bearing leaky cable and aligns its own time with the time reference signal, and starts acoustic signal acquisition when the specified work list time arrives. After the acoustic signal acquisition is completed, the main control electronic bin sends a command to the semi-self-capacitance hydrophone whether to transmit the acoustic signal, and the semi-self-capacitance hydrophone transmits the collected acoustic signals according to the transmission order. After completing one acquisition cycle, each device re-enters the sleep state.

[0043] In addition, it should be noted that the above embodiments are only used to illustrate the technical solutions and implementation technical approaches of the present invention rather than restrictive descriptions. Any simple modifications, equivalent replacements, or decorations made on the basis of the technical essence of the present invention cannot deviate from the technical solutions and implementation technical approaches of the present invention.

Claims

1. A semi-self-contained hydrophone synchronous array based on load-bearing leakage cable for transmitting and receiving signals, characterized in that: The invention comprises a main control electronic compartment (4), a main connection assembly, a load-bearing leakage cable (17) and a plurality of semi-self-contained hydrophones (16); one end of the main control electronic compartment (4) is connected to the load-bearing leakage cable (17) via the main connection assembly; a plurality of semi-self-contained hydrophones (16) are fixedly installed outside the load-bearing leakage cable (17) and are arranged in sequence from top to bottom.

2. A semi-self-contained hydrophone synchronous array based on load-bearing leakage cable signal transmission and reception according to claim 1, characterized in that: The main control electronic warehouse (4) comprises a chip-level clock source (5), a main matching module (6), a main signal generating module (7), a main modulation and demodulation module (8), an electronic warehouse acquisition and storage module (9), a main duty and main control circuit (10), an electronic warehouse battery pack (11), a debugging port (2) and a timing port (3); the chip-level clock source (5) is provided with a debugging port (2) and a timing port (3); the chip-level clock source (5) is connected to the main duty and main control circuit (10); the main duty and main control circuit (10) is connected to the main signal generating module (7) and the main modulation and demodulation module (8); the main modulation and demodulation module (8) is connected to the main matching module (6); the electronic warehouse acquisition and storage module (9) is connected to the main duty and main control circuit (10); the main modulation and demodulation module (8) is connected to the load-bearing leakage cable (17) through the main connecting component; the electronic warehouse battery pack (11) is connected to the main duty and main control circuit (10).

3. A semi-self-contained hydrophone synchronous array based on load-bearing leakage cable signal transmission and reception according to claim 1, characterized in that: The warehouse body of the main control electronic warehouse (4) is also provided with a main control electronic warehouse lifting ring (1).

4. The semi-self-contained hydrophone synchronous array based on load-bearing leakage cable signal transmission and reception according to claim 1, characterized in that: The main connection assembly comprises a connection piece (12), a connection cable (13) and a load-bearing tractor (14); one end of the connection piece (12) is fixedly connected to one end of a warehouse body of a main control electronic warehouse (4); the other end of the connection piece (12) is fixedly installed with a load-bearing tractor (14); the connection cable (13) is connected to a load-bearing leakage cable (17) via the load-bearing tractor (14); and the connection cable (13) is connected to the main control electronic warehouse (4).

5. A semi-self-contained hydrophone synchronous array based on load-bearing leakage cable signal transmission and reception according to claim 4, characterized in that: The bottom tray of the connecting piece (12) is also provided with a hanging ear (18).

6. The semi-self-contained hydrophone synchronous array based on load-bearing leakage cable signal transmission and reception according to claim 1, characterized in that: The load-bearing leakage cable (17) comprises an inner conductor (20), a dielectric layer (21), an outer conductor (23), a watertight layer (24), a load-bearing layer (25) and an outer protective layer (26) which are sequentially stacked from the inside to the outside; a plurality of slots (22) are provided in the outer conductor (23) for radiating signals.

7. A semi-self-contained hydrophone synchronous array based on load-bearing leakage cable for transmitting and receiving signals according to claim 6, characterized in that: The load-bearing layer (25) is made of Kevlar fiber.

8. The semi-self-contained hydrophone synchronous array based on load-bearing leakage cable for transmitting and receiving signals according to claim 1, characterized in that: Each of the semi-self-contained hydrophones (16) comprises an insulating polyurethane dielectric layer (15), a receiving and transmitting antenna (30), a fastener, a slave matching module (32), a slave modulation and demodulation module (33), a slave signal generation module (34), a hydrophone acquisition storage module (35), a hydrophone battery pack (36), a pressure-resistant shell (37), a mounting frame (38), a hydrophone (39), and a slave duty and main control circuit (41); the pressure-resistant shell (37) is fixedly mounted on the load-bearing leakage cable (17) through the mounting frame (38), and the pressure-resistant shell (37) is installed with the slave matching module (32), the slave modulation and demodulation module (33), the slave signal generation module (34), the hydrophone acquisition storage module (35), the hydrophone battery pack (36), and the slave duty and main control circuit (41). The main control circuit (41) is connected to the on-duty and main control circuit (41) and the hydrophone acquisition storage module (35), the on-duty and main control circuit (41) is connected to the hydrophone (39), the matching module (32) is connected to the on-duty and main control circuit (41) after passing through the modulation and demodulation module (33) and the signal generation module (34) in sequence, the matching module (32) is connected to the receiving and transmitting antenna (30), and the hydrophone battery pack (36) is connected to the on-duty and main control circuit (41); the receiving and transmitting antenna (30) is arranged in the insulating polyurethane dielectric layer (15), the receiving and transmitting antenna (30) is fixedly connected to the insulating polyurethane dielectric layer (15) by fasteners, and the load-bearing leakage cable (17) and the receiving and transmitting antenna (30) are arranged at intervals.

9. A semi-self-contained hydrophone synchronous array based on load-bearing leakage cable for transmitting and receiving signals according to claim 8, characterized in that: The distance between the load-bearing leakage cable (17) and the receiving and transmitting antenna (30) is set to 5 cm-10 cm.

10. The semi-self-contained hydrophone synchronous array based on load-bearing leakage cable for transmitting and receiving signals according to claim 1, characterized in that: The other end of the main control electronic compartment (4) is connected to a corresponding load-bearing leakage cable (17) via a corresponding main connection assembly, and a plurality of semi-self-contained hydrophones (16) arranged in sequence from top to bottom are fixedly mounted outside the load-bearing leakage cable (17).

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