Semi-self-contained hydrophone synchronous array for transmitting and receiving signals based on force-bearing leakage cable

Abstract

The invention discloses a semi-self-contained hydrophone synchronous array for transmitting and receiving signals based on a bearing leakage cable. Control signals such as clock signals and the like are transmitted by utilizing the principle that the specially designed force-bearing leakage cable radiates electromagnetic waves; at a semi-self-contained hydrophone end, signals are received by adopting a variable medium receiving antenna mode, so that deep sea vertical array sound signals in a large depth range are synchronously received. In addition to issuing control signals such as clock signals, hydrophone data can be uploaded to a master control electronic bin for storage through a bearing leakage cable, and the reliability of data acquisition is improved. The sound signal synchronous acquisition precision realized by the semi-self-contained hydrophone synchronous array can reach 10 mu S, and the coverage of 2000 m in deep sea can be formed at most. The semi-self-contained hydrophone provided by the invention can be used for carrying out half-wavelength array arrangement or random nested array arrangement according to any frequency.

Description

Technical Field

[0001] The invention relates 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 specifically relates to a semi-self-contained hydrophone synchronous array based on a load-bearing leakage cable for transmitting and receiving signals. Background Art

[0002] At present, acoustic methods are still the main means of conducting research on deep-sea sound propagation, deep-sea background field observation, deep-sea channel feature acquisition, underwater target detection, and deep-sea long-distance communication. Whether it is the requirements for the resolution of the multipath structure of sound line arrival in deep-sea acoustic tomography experiments, or the requirements for the detection depth of underwater targets in deep-sea vertical arrays, these all put forward high requirements for the synchronization acquisition accuracy between the various hydrophone array elements of the deep-sea vertical array. Only when the synchronization acquisition accuracy between the various hydrophone array elements in the deep-sea vertical array meets the expected requirements can a higher array gain be obtained, thereby improving the detection accuracy and distance of the vertical array. For example, in acoustic tomography experiments, based on the experience that the difference in multipath arrival time is between 10mS-20mS, the synchronization error between each hydrophone should be less than at least one order of magnitude of this value, so the 30-day synchronization error between each hydrophone is required to be within 1-2mS; in the application of underwater target detection, such as the detection of the horizontal azimuth of the target by the towed array and the detection of the vertical depth of the target by the vertical array, the synchronization accuracy between each hydrophone is required to be within 20μS.

[0003] In order to achieve the synchronous acquisition of acoustic signals of deep-sea vertical arrays, the following solutions are currently used: The scheme of using oil-filled array hydrophones for data collection uses a single clock for synchronous data collection to effectively solve the problem of synchronization accuracy. However, array hydrophones generally need to be arranged within the array aperture according to half the wavelength of the highest detection frequency. Taking the 1kHz detection frequency as an example, the spacing of the half-wavelength array is 0.75 meters. To cover the large depth range of 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 collection. Although segmented data collection can be used to reduce the number of wires, the huge number of hydrophones will still greatly increase the diameter of the array. In the range of large depths, the increase in scale is unacceptable.

[0004] Since the increase in the size of the oil-filled array hydrophone mainly comes from its wires, distributing the clock signal and power supply, acquisition and storage functions to each hydrophone array element to make a fully self-contained hydrophone has become the choice of many large-scale vertical array designs (i.e., eliminating the wires). However, each hydrophone requires a clock source, which greatly increases the absolute timekeeping accuracy requirements of each clock source. To achieve high-precision synchronous acquisition between hydrophones, a high-precision atomic clock is often required. The increased power consumption of the high-precision atomic clock leads to a significant reduction in the continuous working time of the fully self-contained hydrophone, or the battery capacity can only be increased to achieve long-term equipment duty, which is also unacceptable in practical applications such as underwater target detection.

[0005] The compromise solution is to use plastic-coated steel cables combined with electromagnetic induction coupling coils, or to fix small-sized electromagnetic induction synchronous cables on the load-bearing ropes to directly transmit clock signals to the self-contained hydrophones, while the power supply, collection and storage are solved by the hydrophones themselves. This method balances the contradictions such as the increase in scale brought about by high-precision synchronous acquisition to a certain extent, but there are still other problems to a certain extent. For example, the magnetic induction coupling transmission of plastic-coated steel cables requires the use of a long-distance solid steel cable. In the coverage range of several thousand meters in the deep sea, the weight of the solid steel cable will lead to a large increase in the required buoyancy materials. At the same time, the plastic-coated material of the solid steel cable cannot be damaged, otherwise it will cause the steel cable to be corroded by seawater and break, which is not suitable for long-term deployment. The method of fixing small-sized synchronous cables on the load-bearing ropes will also make the deployment and recovery process complicated and cumbersome when deployed in a vertical array at a great depth. The cable will be entangled or broken with the load-bearing rope due to the action of ocean currents, resulting in the failure of synchronous acquisition.

[0006] Therefore, it is necessary to propose a better hydrophone synchronized array. Summary of the invention

[0007] In order to solve the problems and needs existing in the background technology, the present invention proposes a semi-self-contained hydrophone synchronous array based on load-bearing leakage cable signal reception and transmission. The present invention uses the principle of leakage coaxial cable radiating electromagnetic waves to transmit control signals such as clock signals; at the semi-self-contained hydrophone end, a variable medium receiving and transmitting antenna is used to receive the signal, thereby realizing the synchronous reception and transmission of deep-sea vertical array acoustic signals within a large depth range. The semi-self-contained hydrophone synchronous array proposed in the present invention is an array-type synchronous array that can solve the acoustic signals under conditions such as marine environmental noise, target acoustic signals or acoustic propagation tests in a large depth range. The present invention can be applied to the synchronous acquisition of acoustic data such as deep-sea marine environment surveys, dynamic environment monitoring, and acoustic target detection.

[0008] The technical solution of the present invention is as follows: A semi-self-contained hydrophone synchronous array based on a load-bearing leakage cable for sending and receiving signals includes a main control electronic compartment, a main connection component, a load-bearing leakage cable and a plurality of semi-self-contained hydrophones. One end of the main control electronic compartment is connected to the load-bearing leakage cable through the main connection component, and a plurality of semi-self-contained hydrophones arranged in sequence from top to bottom are fixedly installed outside the load-bearing leakage cable.

[0009] The main control electronic warehouse includes a chip-level clock source, a main matching module, a main signal generating module, a main modulation and demodulation module, an electronic warehouse acquisition and storage module, a duty and main control circuit, an electronic warehouse battery pack, a debugging port and a timing port; the chip-level clock source is provided with a debugging port and a timing port, 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 generating module and the main modulation and demodulation module, the main modulation and demodulation module is connected to the main matching module, the electronic warehouse 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 leakage cable through the main connecting component; the electronic warehouse battery pack is connected to the duty and main control circuit.

[0010] The warehouse body of the main control electronic warehouse is also provided with a main control electronic warehouse lifting ring.

[0011] The main connecting component includes a connecting piece, a connecting cable and a load-bearing tractor. The top of the connecting piece is fixedly connected to the bottom of the warehouse body of the main control electronic warehouse. The load-bearing tractor is fixedly installed in the bottom of the connecting piece. The connecting cable is connected to the load-bearing leakage cable through the load-bearing tractor, and the connecting cable is connected to the main control electronic warehouse.

[0012] The bottom tray of the connector is also provided with hanging ears.

[0013] The load-bearing leakage cable comprises an inner conductor, a dielectric layer, an outer conductor, a watertight layer, a load-bearing layer and an outer protective layer which are sequentially stacked from the inside to the outside; a plurality of slots are provided in the outer conductor for radiating signals.

[0014] The load-bearing layer is made of Kevlar fiber.

[0015] Each of the semi-self-contained hydrophones comprises 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 generating module, a hydrophone collection and storage module, a hydrophone battery pack, a pressure-resistant shell, a mounting frame, a hydrophone and a slave duty and main control circuit; the pressure-resistant shell is fixedly installed at the load-bearing leakage cable through the mounting frame, and the slave matching module, the slave modulation and demodulation module, the slave signal generating module, the hydrophone collection and storage module, the hydrophone battery pack and the slave duty and main control circuit are installed in the pressure-resistant shell, the slave duty and main control circuit is connected to the hydrophone collection 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 the slave modulation and demodulation module and the slave signal generating module in turn, 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 in 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 leakage cable and the receiving and transmitting antenna are arranged at intervals.

[0016] The distance between the load-bearing leakage cable and the receiving and transmitting antenna is set to 5cm-10cm.

[0017] The top of the main control electronic warehouse is connected to the corresponding load-bearing leakage cable through the corresponding main connection assembly. The load-bearing leakage cable is fixedly installed with a number of semi-self-contained hydrophones arranged in sequence from top to bottom, that is, the load-bearing leakage cables and semi-self-contained hydrophones are symmetrically installed on both sides of the main control electronic warehouse, forming a receiving array on each side. 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 meters in the deep sea.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a load-bearing leakage cable. Under the condition of low power consumption, the signal transmission loss is 29dB / km. Taking into account the process factors, the load-bearing leakage cable on one side of the main control electronic warehouse can be made into a length of 1000m, and the main control electronic warehouse can be arranged in the middle of two 1000m load-bearing leakage cables. Therefore, the semi-self-contained hydrophone synchronous array proposed in the present invention can form a deep sea coverage of 2000m; load-bearing leakage cables of different lengths can also be made according to specific sea depth requirements for shallow water deployment.

[0019] 2. Within the range of the load-bearing leakage cable, all hydrophones of the present invention only send down one clock signal, and the synchronization acquisition accuracy can reach within 10μS. The collected acoustic signals can be used for beamforming of the vertical array and improve the detection accuracy and range.

[0020] 3. In addition to sending clock signals, the present invention can also upload hydrophone data to the main control electronic warehouse for storage through the load-bearing leakage cable, so as to achieve local hydrophone and host computer backup storage, thereby improving the reliability of data acquisition.

[0021] 4. The load-bearing leakage cable used in the present invention can be slotted at equal intervals, and the slot positions can be engraved on the outer skin of the load-bearing leakage cable. The semi-self-contained hydrophone can be arranged in a half-wavelength array or in an arbitrary nested array at the load-bearing leakage cable according to any frequency.

[0022] 5. The load-bearing leakage cable used in the present invention has a diameter of less than 15 mm, a maximum load-bearing capacity of 4 tons, a density close to that of seawater, and is relatively light, and has no other parts except the cable. The load-bearing leakage cable can be laid and recovered manually or by winch equipment, which is relatively convenient. The load-bearing leakage cable proposed in the present invention is double watertight and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of a semi-self-contained hydrophone synchronous array based on a load-bearing leakage cable for transmitting and receiving signals.

[0024] Figure 2 It is a structural diagram of a load-bearing leakage cable.

[0025] Figure 3 It is a structural schematic diagram of a semi-self-contained hydrophone and a load-bearing leakage cable.

[0026] Figure 4 It is a schematic diagram of the communication between the receiving and transmitting antennas in the semi-self-contained hydrophone and the load-bearing leakage cable.

[0027] Figure 5 It is a control framework diagram of a semi-self-contained hydrophone synchronous array based on a load-bearing leakage cable for transmitting and receiving signals.

[0028] In the figure: main control electronic warehouse lifting ring 1, debugging port 2, timing port 3, main control electronic warehouse 4, chip-level clock source 5, main matching module 6, main signal generation module 7, main modulation and demodulation module 8, electronic warehouse acquisition storage module 9, main duty and main control circuit 10, electronic warehouse battery pack 11, connector 12, connecting cable 13, load-bearing tractor 14, insulating polyurethane dielectric layer 15, semi-self-contained hydrophone 16, load-bearing leakage cable 17, hanging ear 18, load-bearing structure 19, inner conductor 20, dielectric layer 2 1, slot 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 collection and storage module 35, hydrophone battery pack 36, pressure-resistant shell 37, mounting bracket 38, hydrophone 39, hydrophone protective shell 40, slave duty and main control circuit 41, leakage signal 42, transmission signal 43. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one", "one" or "the" and similar words do not indicate quantity restrictions, but indicate that there is at least one. "Include" or "include" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] like Figure 1 and Figure 5As shown, the semi-self-contained hydrophone synchronous array proposed by the present invention includes a main control electronic compartment 4, a main connection component, a load-bearing leakage cable 17 and a plurality of semi-self-contained hydrophones 16. The bottom of the main control electronic compartment 4 is connected to the load-bearing leakage cable 17 through the main connection component. A plurality of semi-self-contained hydrophones 16 arranged in sequence from top to bottom are fixedly installed outside the load-bearing leakage cable 17 to form an array. The plurality of semi-self-contained hydrophones 16 are arranged in sequence along the axial direction of the load-bearing leakage cable 17.

[0032] The main control electronic warehouse 4 includes 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 main control electronic warehouse 4 is also provided with a main control electronic warehouse lifting ring 1 on the top of the warehouse body, and the main control electronic warehouse lifting ring 1 and the end of the load-bearing leakage cable can be arranged with a load-bearing structure 19 that can be used for mooring, so the device can be deployed in the form of a submerged buoy alone, or it can be used as a part of the equipment in the submerged buoy and combined with other equipment to form a more complex submerged buoy for deployment and use. The chip-level clock source 5, the main matching module 6, the main signal generating module 7, the main modulation and demodulation module 8, the electronic warehouse acquisition and storage module 9, the main duty and main control circuit 10, and the electronic warehouse battery pack 11 are installed in the warehouse body. The chip-level clock source 5 is provided with a debugging port 2 and a timing port 3, and the connection port thereof adopts a rubber connector, and the communication protocol is that the debugging cable adopts network transmission, and the timing signal adopts TTL level transmission, wherein the timing cable is mainly responsible for sending the time base signal to the chip-level clock source 5 in the main control electronic warehouse 4, and the debugging cable is mainly used for setting the transmission task and reading the collected data. The chip-level clock source 5 is connected to the main duty and main control circuit 10, and the main duty and main control circuit 10 are connected to the main modulation and demodulation module 8 through the main signal generation module 7, and the main modulation and demodulation module 8 is connected to the main matching module 6, and the electronic warehouse collection and storage module 9 is connected to the main duty and main control circuit 10, and the main modulation and demodulation module 8 is connected to the load-bearing leakage cable 17 through the main connection component; the electronic warehouse battery pack 11 is directly connected to the main duty and main control circuit 10, and supplies power to the main matching module 6, the main signal generation module 7, the main modulation and demodulation module 8, and the electronic warehouse collection 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 a high-precision clock signal, the main signal generation module 7 is used to encode and generate the clock signal, the main modulation and demodulation module 8 is used to modulate the clock signal and send it to the main matching module 6 for signal transmission, and the electronic warehouse acquisition and storage module 9 is used to store the information sent by the hydrophone, which includes but is not limited to the state information of the hydrophone, the time domain sound signal information and the pre-processed spectrum information. After the setting is completed, the chip-level clock source 5 and the main duty and main control circuit 10 are always in working state, and the other devices such as the main signal generation module 7, the main modulation and demodulation module 8, the main matching module 6 and the electronic warehouse acquisition and storage module 9 enter the dormant state.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] like Figure 3As shown, each semi-self-contained hydrophone 16 includes an insulating polyurethane dielectric layer 15, a receiving and transmitting antenna 30, a fastener, a connector 31, a slave matching module 32, a slave modem module 33, a slave signal generating 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, a hydrophone protective shell 40, a temperature-compensated crystal oscillator, and a slave duty and main control circuit 41; the pressure-resistant shell 37 is fixed by the mounting frame 38 and the fastener Installed at the load-bearing leakage cable 17, the pressure-resistant shell 37 is equipped with a slave matching module 32, a slave modulation and demodulation module 33, a slave signal generating module 34, a hydrophone acquisition storage module 35, a hydrophone battery pack 36 and a slave duty and main control circuit 41. The slave duty and main control circuit 41 is connected to the hydrophone acquisition storage module 35 and a temperature compensated crystal oscillator. The slave duty and main control circuit 41 is connected to a hydrophone 39 installed in a hydrophone protective shell 40. An ordinary crystal oscillator is used in the hydrophone 39. The slave matching module 32 is connected to the slave duty and main control circuit 41 after passing through the slave modem module 33 and the slave signal generating 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 main control circuit 41; the receiving and transmitting antenna 30 is arranged in the insulating polyurethane dielectric layer 15, and the receiving and transmitting antenna 30 is fixedly connected to the insulating polyurethane dielectric layer 15 through a fastener. The load-bearing leakage cable 17 and the receiving and transmitting antenna 30 are arranged in intervals and parallel to each other, and the distance between the load-bearing leakage cable 17 and the receiving and transmitting antenna 30 is set to 5cm-10cm. 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 leakage cable in the marine environment is easily absorbed by seawater. The electromagnetic signal of the load-bearing leakage cable is transmitted to the receiving and transmitting antenna inside the polyurethane material, so as to realize the transmission across the seawater medium between the leakage signal and the hydrophone. The fasteners are specifically embedded nuts 27, screws 28 and pressure blocks 29. Several embedded nuts 27 are arranged in one side of the insulating polyurethane dielectric layer 15. The pressure blocks 29 cooperate with the embedded nuts 27 through the screws 28, so that the load-bearing leakage cable 17 is fixed to one side of the insulating polyurethane dielectric layer 15. The communication diagram between the receiving and transmitting antennas and the load-bearing leakage cable is shown in FIG. Figure 4As shown, the load-bearing leakage cable generates a leakage signal 42, and the receiving and transmitting antenna 30 generates a transmitting signal 43. The signal is transmitted through the variable dielectric layer formed by the insulating polyurethane dielectric layer 15, that is, a variable dielectric wireless signal transmission channel is established between the load-bearing leakage cable and the receiving and transmitting antenna 30 to complete the uplink and downlink transmission of data. The slave duty and main control circuit 41 generates a time base signal, and the debugging cable is also used to set the semi-self-contained hydrophone. Here, the work plan list of the semi-self-contained hydrophone needs to be set to the same place as the work plan list of the main control electronic warehouse. After the setting is completed, the slave duty and main control circuit 41 is in 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 storage module 35 and the electronic warehouse acquisition storage module 9 enter the dormant state.

[0037] The present invention uses the principle of electromagnetic wave radiation of a specially designed load-bearing leakage cable to transmit control signals such as clock signals; at the semi-self-contained hydrophone end, a variable dielectric receiving antenna is used to receive signals, thereby realizing the synchronous reception of deep-sea vertical array sound signals within a large depth range. In addition, the vertical array sound signal data received by the semi-self-contained hydrophone is stored locally, and the data is transmitted to the main control electronic warehouse through the load-bearing leakage cable through the variable dielectric receiving antenna for storage and backup.

[0038] The working process of the semi-self-contained hydrophone synchronous array proposed by the present invention is as follows: The time base of the chip-level clock source 5 is obtained through the deck unit timing. The main duty and main control circuit 10 sleeps during non-working hours. The main duty and main control circuit 10 reads the time base signal after waking up 1 minute before working time, modulates the time base signal and sends it by the main matching module 6 and the bearing leakage cable, and the transmission frequency is not less than 1Hz. The semi-self-contained hydrophone is also provided with a duty circuit. This value can be changed according to the long-term timekeeping accuracy of the temperature-compensated crystal oscillator 1 minute before work. After waking up, it is determined to start reading the time base signal transmitted from the bearing leakage cable, and align its own time with the time base signal. When the specified work list time arrives, the sound signal collection is carried out. After the sound signal collection is completed, the main control electronic warehouse sends a command to the semi-self-contained hydrophone whether to transmit the sound signal, and the semi-self-contained hydrophone transmits the collected sound signal according to the transmission order. After completing a collection cycle, each device goes back to sleep.

[0039] In addition, it should be noted that the above embodiments are only used to illustrate the technical solutions and implementation methods of the present invention and are not intended to be limiting. Simple modifications, equivalent replacements or modifications made on the basis of the technical essence of the present invention cannot deviate from the technical solutions and implementation methods 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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