CN112363105B - Long-time standby long-distance underwater intense sound pulse beacon system - Google Patents
Long-time standby long-distance underwater intense sound pulse beacon system Download PDFInfo
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
- G01S1/76—Systems for determining direction or position line
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Abstract
The invention provides a long-time standby long-distance underwater strong sound pulse beacon system which comprises an underwater long-time standby value comparison system and an underwater plasma beacon transmitting system. The searching efficiency and probability are greatly improved, and the practicability of the underwater sound beacon system is enhanced.
Description
Technical Field
The invention belongs to an underwater acoustic positioning system, and particularly relates to a system which needs long standby operation, has high requirements on sound source level, high electroacoustic conversion efficiency and wide operating frequency band. And more particularly, to an underwater intense sound pulse beacon system with long standby time, high sound source and wide working frequency band.
Background
The aircraft or the ship will be equipped with a trace recorder, i.e. "black box", for analyzing the cause of the failure of the aircraft or the ship in time. However, if an aircraft or ship is lost at sea, the "black box" will fall into the sea with the lost aircraft debris or ship debris, which creates a problem in how to effectively find the "black box" in the sea. In addition, underwater vehicles such as torpedoes, mines, UUV and the like can also generate the problem of how to track and seek track and position in the experimental or actual use process.
In order to quickly and effectively find the black box in the sea water or track tracking and positioning are carried out. The fact can be considered from the following two aspects.
Firstly, the searching capability is improved, more signal sensitive and accurate searching equipment is used, and a more scientific searching, positioning and measuring method is used. For example, in order to quickly search for a black box acoustic beacon signal in a deep sea area, the towed acoustic beacon detector has a wide coverage range and large working water depth, so that a large-area sea area can be quickly searched, the searching efficiency of the black box is greatly improved, and the towed acoustic beacon detector is one of the main means adopted at present. In addition, the transducer is designed to adopt a multi-element circular matrix, an improved towed search sonar system is developed, and a rapid search three-step walking strategy which is advanced gradually from far to near is provided, so that the search work can be more scientific and reasonable.
Secondly, starting from the "black box", i.e. the acoustic beacon, consider an acoustic beacon with more outstanding performance. Currently, the flight or navigation recorder, namely a black box, is provided with an acoustic beacon which is automatically activated after entering water, namely, a specific acoustic signal (periodically transmitting an acoustic pulse signal with the frequency of 37.5 kHz) is transmitted, and the acoustic beacon can be found by using a receiver with a corresponding frequency band.
The current underwater positioning beacon device mainly comprises an acoustic transducer, a signal processing circuit board, a battery and a watertight cabin. Acoustic transducers mainly realize signal conversion of electroacoustic. The signal processing board is used for processing the received sound signals. The battery is an energy source for maintaining the normal operation of the underwater positioning beacon device circuit. The watertight cabin provides a watertight space for the whole device and can bear the action of water pressure. Acoustic beacons typically operate underwater for only about 30 days, requiring that quick search and localization of the acoustic beacon must be accomplished in a short period of time. In addition, the sound source level of the sound beacon is low, the transmitting frequency is higher, the sound energy decays rapidly in water, and the common receiver has a working distance of about 2 km.
Patent document CN105607032a proposes an underwater acoustic beacon system, in which a singlechip module is used to generate signals of required frequency, pulse width and period through an internal timer, and the signals drive a transducer to emit acoustic signals after passing through a power amplification module and an impedance matching circuit of the transducer. However, the traditional transducer is adopted, the sound source level is low, the emission frequency is high, the acoustic energy decays rapidly in water, the propagation distance in water is limited, the effective acting distance is 2km, and the requirements of finding a target and rapidly positioning in a limited time cannot be met. Patent document CN210803705U proposes a passive underwater acoustic position indicating beacon system, which uses an integrated transceiver transducer to complete the information interaction capability of the underwater acoustic beacon, and such a design enables the system to simultaneously have the capability of receiving and transmitting acoustic signals. But also evades the problem of low sound source level caused by using conventional transducers to implement electroacoustic signal conversion. Patent document ZL201410136972.3 proposes an underwater vehicle tracking beacon system based on plasma pulse signals, and the invention adopts a plasma sound source as a beacon sound source, utilizes the advantages of high sound power, narrow pulse width, high resolution and the like of the emission of an underwater plasma strong sound source, improves the action distance and has higher positioning precision. But the underwater working time is short, and the working requirement of more than 30 days of an actual acoustic beacon is not met.
In order to find the underwater acoustic beacon as soon as possible within a limited time, it is possible to increase the detection distance of the underwater acoustic beacon signal by the water surface searching device, i.e., to increase the receiving sensitivity of the searching device. In addition, it is also necessary to consider the use of underwater acoustic beacons with stronger sound source levels. In order to increase the working time of the underwater acoustic beacon, it is also necessary to use an underwater acoustic beacon having a longer working time.
With the continuous development of underwater plasma megasonic technology, and the practical application of the technology in various industries, such as in-vitro lithotripsy, oil well blockage removal, sewage treatment, pipeline descaling underwater target detection and the like. Therefore, the application range of the underwater plasma megasonic technology is very wide. Given that underwater plasma-enhanced sound sources have superior sound source levels, electroacoustic conversion efficiencies, and a wider spectral range (including 37.5 kHz) than they have, underwater plasma-enhanced sound techniques have been the technical basis for underwater sound beacon applications.
The underwater plasma intense sound source applies the principle of 'hydro-electric effect', thereby generating the effect of underwater intense sound pulse. The 'hydro-electric effect' is that when the high-power pulse power supply carries out pulse discharge of high voltage and high current on the water medium load in the electrode gap, a series of physical and chemical reactions are generated, so that various effects are generated, and one of the effects is that high-power intense sound pulse is generated.
The underwater plasma pulse sound source has high emission power (the sound source level can reach more than 220 dB), and has the characteristics of narrow pulse and high sound source level. In the field of long-range object detection, a single pass of 25km of active distance has also been achieved. Thus, the underwater plasma pulse sound source can greatly increase the distance over which the acoustic beacon is detected. However, the underwater plasma pulse sound source belongs to equipment with higher power, so that the underwater continuous operation time is limited, which causes the defect of insufficient underwater continuous operation time.
Thus, the invention provides an underwater dormancy working mechanism. The underwater acoustic beacon always keeps in a dormant state after entering water, and enters a working state after being awakened by a high-power acoustic signal transmitting device on a searching ship, so that a strong acoustic pulse beacon signal starts to be transmitted, and the remote target tracking is realized. Because the size and the power consumption of the device are limited, the power of the sound generating device on the search ship can be quite large, and the propagation distance of the sound signal is increased. At the moment, the wake-up signal is sent to the underwater sound beacon through the high-power sound emitting device on the search ship, then the underwater sound beacon receives the wake-up signal through the receiving transducer, and after the receiving transducer of the underwater sound beacon receives the wake-up signal in a long distance, the underwater plasma pulse sound source sends a high-sound source plasma pulse sound signal, so that the action range of the underwater sound beacon is enlarged, and meanwhile the requirement of long-time underwater standby is met.
However, due to the device limitations of current underwater acoustic transducers, their emission sound source level is typically no more than 190dB at maximum. The problem that the sound source level of a wake-up signal transmitted by a water surface search ship (related to the acting distance of equipment) is not matched with the sound source level (> 220 dB) of a trace positioning intense sound pulse transmitted by a long-time standby long-distance underwater intense sound pulse beacon system occurs, so that the defect of capability redundancy of the long-time standby long-distance underwater intense sound pulse beacon system is caused, meanwhile, the working distance of the long-time standby long-distance underwater intense sound pulse beacon system is indirectly shortened, and the technical advantages brought by the combination of the long-time standby value system and the underwater plasma beacon transmitting system under water are not achieved.
Disclosure of Invention
In order to solve the defects of short signal acting distance and short independent underwater working time caused by small sound source level of the existing underwater acoustic beacon, the invention provides a novel underwater acoustic beacon solution which realizes the function of long-time underwater standby work by utilizing a dormancy passive awakening technology; the underwater plasma electroacoustic conversion principle is utilized to generate a strong sound pulse beacon signal, so that the acting distance of the underwater sound beacon is greatly improved. In addition, the method of simultaneously using two completely different types of wake-up signals can furthest increase the acting distance of the long-time standby long-distance underwater intense sound pulse beacon system, bring convenience to searching and increase the searching efficiency.
The technical scheme of the invention is as follows:
the long-time standby long-distance underwater intense sound pulse beacon system is characterized in that: the system comprises an underwater long-time standby value system and an underwater plasma beacon transmitting system;
the underwater long-time standby value system receives and detects a wake-up signal sent by the search device, the underwater strong sound pulse beacon system is in a sounding and position indicating working mode according to the wake-up signal, and when the wake-up signal is not received, the underwater strong sound pulse beacon system is in a standby sleep mode; therefore, the existence of a longer-term standby value system under water greatly increases the working time of the underwater acoustic beacon under water;
the underwater plasma beacon transmitting system completes the transmission of plasma pulse acoustic signals, and the transmitting sound source level is high (> 220 dB), so that the propagation distance of the underwater plasma beacon signals is enhanced;
the underwater long-term standby value system and the underwater plasma beacon transmitting system are connected in a watertight manner structurally through the mode of fixing and butting the cabin sections, an integrated system is formed, the cabin sections are connected through a serial data bus and/or a digital I/O circuit, internal communication is carried out, and the underwater long-term standby value system is used for powering on the underwater plasma beacon transmitting system and transmitting a work enabling signal.
Further, the underwater long-time standby value system comprises a water inlet detection electrode, a receiving transducer and a value cabin section;
the water inlet detection electrode penetrates through the insulating end cover at the outer side of the cabin section to extend into the cabin section by using a metal screw in a screwing mode, so that the output of the water inlet detection electrode is introduced into the cabin section by the metal screw;
the receiving transducer is connected with the watertight connector and the watertight cable through an insulating end cover (also an end cover at one side of the whole watertight cabin body and processed by using insulating materials) at the outer side of the watertight cabin section, so that the output of the receiving transducer is introduced into the watertight cable;
the receiving transducer and the end cover penetrated by the water inlet detection electrode are insulating end covers at the outer side of the cabin section, and the receiving transducer and the water inlet detection electrode are both positioned at the outer side of the cabin section;
the value-added cabin section comprises a value-added cabin body and an underwater long-time standby value-added cabin system; the cabin body provides a stable and independent working environment for the underwater long-time standby value system; the system in the underwater long-term standby value-changing cabin is arranged in the cabin body of the value-changing cabin, and the system functions of the underwater long-term standby value-changing system are realized together with the receiving transducer and the water inlet detection electrode, so that the signal receiving and processing of the underwater long-term standby value-changing system are completed;
The underwater long-time standby value cabin-more system comprises a water inlet detection unit, a value power-more unit, a signal conditioning unit and a signal processing unit; the water inlet detection unit receives a water inlet detection signal transmitted from the outside of the cabin by the water inlet detection electrode, judges whether the system is water inlet or not, and further controls whether the power supply unit supplies power or not; the value-added power supply unit supplies power to other units of the whole value-added cabin system and is controlled by the water inlet detection unit; the output signal of the receiving transducer is input to the signal conditioning unit, the signal conditioning unit amplifies and filters the signal and then sends the signal to the signal processing unit, the signal processing unit analyzes and judges the signal, if the signal is judged to receive the wake-up signal, parameters of the underwater plasma beacon transmitting system are set through a serial communication bus (RS-232 or RS-485 and the like), and different modes of operation are carried out.
Further, the water inlet detection unit comprises an amplifier and a comparator; the water inlet detection electrode signal is amplified to a level which can be judged by the comparator through the amplifier, the comparator judges the amplified signal, whether the system is water inlet or not is judged, and whether the power supply unit supplies power or not is controlled; the value-added power supply unit is powered by a storage battery, and a plurality of batteries are combined in series-parallel to generate voltage and current meeting the system requirement; under the control of the water inlet detection unit, the value-more power supply unit supplies power to other units of the system in the value-more cabin through the voltage conversion chip; the signal conditioning unit comprises a band-pass filter and a signal amplifier; after being processed by a band-pass filter, the received transducer signals are transmitted to a signal amplifier for signal amplification processing, so that the signals are transmitted to a signal processing unit; the signal processing unit comprises a data acquisition unit and a data processing unit; the data acquisition unit performs AD conversion on the signals transmitted by the signal conditioning unit, and the signals are converted into digital signals and buffered; the data processing unit analyzes and processes the data, judges whether a corresponding wake-up signal is received, controls a power supply unit enabling end of the underwater plasma beacon transmitting system through the digital I/O port, and controls working parameters of the underwater plasma beacon transmitting system through the serial data bus.
Further, the underwater plasma beacon transmitting system comprises a charging cabin section, an energy storage cabin section and a plasma discharge electrode; the charging cabin section and the energy storage cabin section are separated by a metal partition board and are fastened by a watertight structure locked by screws;
the plasma discharge electrode passes through an end cover at the outer side of the energy storage cabin section (also an end cover at the other side of the whole watertight cabin body) in a screw-in locking mode, is tightly connected with a high-voltage output interface of the energy storage cabin section in a spring copper sleeve connection mode, and outputs high voltage to the anode and the cathode of the plasma discharge electrode; the discharge part of the plasma discharge electrode is positioned in water outside the energy storage cabin section, the plasma discharge electrode obtains high voltage from the energy storage cabin section, and the final underwater plasma electroacoustic conversion process, namely the generation point of the 'liquid electric effect', is completed at the discharge tip of the plasma discharge electrode, so that strong sound pulses are generated and radiated out in all directions through the water medium;
the charging cabin section comprises a charging cabin body, the energy storage cabin section comprises an energy storage cabin body, and the charging cabin body and the energy storage cabin body provide a stable and independent working environment for the underwater plasma beacon transmitting system; the underwater plasma beacon transmitting cabin system is arranged in the charging cabin body and the energy storage cabin body and jointly realizes the function of the underwater plasma beacon transmitting system with the plasma discharging electrode;
The underwater plasma beacon emission cabin system comprises an emission power supply unit, a control unit, a high-voltage generation unit, an energy storage unit and a trigger unit;
the emission power supply unit, the control unit and the high-voltage generation unit are positioned in the charging cabin body, and the energy storage unit and the triggering unit are positioned in the energy storage cabin body; the transmitting power supply unit supplies power to the control unit and the high-voltage generation unit after voltage conversion through the voltage conversion chip under the control of digital I/O (input/output) enabling of a system with a long-term underwater standby value; the control unit receives different working mode parameters sent by the underwater long-time standby value more system through the serial communication bus, generates a control signal of the transmitting power supply unit, and controls the output voltage of the transmitting power supply unit, so as to control the power supply voltage of the high-voltage generating unit to control the charging rate and further control the discharging period; the energy storage unit is connected with the high-voltage generation unit for storing electric energy; the trigger unit and the energy storage unit are connected with the plasma discharge electrode outside the cabin in the same loop to form a discharge loop, so that the plasma discharge electrode is discharged by forming a high-voltage loop, a 'hydro-electric effect' is formed, and a pulse sound signal is generated.
Furthermore, the emission power supply unit is powered by a storage battery, a plurality of batteries are combined in series-parallel to generate a power supply which meets the voltage and current requirements of the system, and the power supply is supplied to the high-voltage generation unit and the control unit through the voltage conversion chip under the enabling control of the underwater long-time standby value more system digital I/O; the control unit controls the output voltage of the voltage conversion chip so as to control the working voltage of the high-voltage generating unit and further control the discharge frequency of the high-voltage pulse; the high-voltage generating unit generates high-frequency oscillation pulses under the control of the control unit, and the high-frequency oscillation pulses are boosted to a preset voltage value through the pulse transformer, and high-voltage direct current is obtained after pulse rectification, so that high voltage is generated to charge the energy storage unit; the energy storage unit consists of an energy storage capacitor, the energy storage capacitor is fixed in the energy storage cabin body through a capacitor fixing frame in a screw fastening mode, the negative electrode of the energy storage capacitor group is connected with the capacitor fixing frame and grounded, the positive plate is connected with a positive cable at the output end of the high-voltage generating unit, and the positive plate is fastened with a high-voltage electrode of the triggering unit; the trigger unit consists of a trigger switch, and the trigger switch adopts a bipolar plate air trigger switch (a field distortion spark gap switch is in a self-triggering mode); the high-voltage electrode of the trigger switch is fastened with the positive electrode of the energy storage capacitor, and the low-voltage electrode of the trigger switch is fastened with the connecting component of the discharge electrode core.
Further, the charging cabin section, the energy storage cabin section and the value-changing cabin section form a watertight cabin structure of the underwater sound beacon together; one end of the charging cabin section is an energy storage cabin section, and the other end of the charging cabin section is a value comparison cabin section; the underwater long-time standby value system comprises a value comparison cabin section, and the underwater plasma beacon transmitting system comprises a charging cabin section and an energy storage cabin section; the three cabins are separated by a metal partition board and are fastened by a watertight structure, so that an integrated watertight cabin structure is formed; the watertight cabin of the underwater acoustic beacon is used for isolating outside seawater and providing a stable working environment for each system in the underwater intense acoustic pulse beacon system. The watertight cabin, the receiving transducer, the plasma discharge electrode and the water inlet detection electrode are tightly connected to form a complete watertight structure.
Further, there are two modes of underwater wake-up signals for underwater hard-sounding pulse beacon systems. In the first mode, a carrier-based plasma intense sound source with the same specification (same intensity of intense sound pulse emission of an underwater intense sound pulse beacon system) is used for emitting intense sound pulses with equal time intervals, and after the long-time standby long-distance underwater intense sound pulse beacon system receives intense sound pulses sent from the water surface with equal time intervals, system wake-up is carried out, and signal transmission with symmetrical intensity is completed. Therefore, the problem that the sound signal transmission distance of the long-time standby long-distance underwater strong sound pulse beacon system is not matched due to insufficient sound source level of the water surface transmitting transducer is solved, and the found distance of the long-time standby long-distance underwater strong sound pulse beacon system is indirectly increased; the second mode uses the ship-based common underwater acoustic transmitting transducer to transmit signals with a certain composition format such as: common underwater acoustic communication signals such as a single-frequency pulse signal (CW), a chirp signal (LFM), a hyperbolic tone signal (HFM), a pseudo random signal (PR), and the like. The control of the working period and the sleep period of the long-time standby long-distance underwater strong sound pulse beacon system is finished, namely the coding control of the long-time standby long-distance underwater strong sound pulse beacon system is finished; the two modes are used to obtain different intense sound pulse signals from the response of the underwater intense sound pulse beacon system at different stages of searching the underwater intense sound pulse beacon system, so that the searching efficiency of the beacon is greatly improved.
Advantageous effects
The invention solves the problem of short propagation distance of the acoustic signal of the beacon caused by short underwater working time and low sound source level in the existing underwater acoustic beacon by using a longer-term standby value system and an underwater plasma beacon transmitting system. An underwater acoustic beacon system with more excellent performance is realized.
The invention adopts an underwater plasma pulse sound source as a beacon sound source. Because the pulse sound wave generated by the underwater plasma pulse sound source has the characteristics of narrow pulse (us-ms magnitude), wide frequency bandwidth (especially <10kHz, high energy density) and high source level (> 220 dB), the transmission distance is long (up to 10 km), and the repetition frequency can reach several Hz level, so the device is suitable for a remote underwater sound beacon system.
The invention adopts the underwater plasma pulse as the beacon, and because the pulse frequency band is wide, the invention can use various search frequencies to carry out tracking and positioning (can not only use 37.5kHz frequency to carry out beacon positioning), increases the method of directional positioning of the beacon, and improves the tracking speed and positioning precision.
According to the invention, different wake-up signals are received by the receiving transducer, so that more flexible and changeable beacon working modes are completed. The beacon is in a more standby state when entering water, and performs intense sound pulse transmission (long-distance low-frequency pulse transmission and short-distance high-frequency pulse transmission) with different periods according to different wake-up signals so as to realize good and quick beacon tracking.
The charging cabin, the energy storage cabin and the value comparison cabin adopt sectional structures, have good expansibility and are convenient to assemble, use and maintain. The cabin bodies are isolated by using metal partition plates, and the electromagnetic compatibility is good.
The discharge electrode interface of the invention adopts a spring copper sleeve connection mode to enable the discharge electrode to be tightly connected with the energy storage cabin, thereby ensuring the conductivity under the conditions of high voltage and high current and facilitating the disassembly and replacement of the discharge electrode.
The invention has small volume, high system integration level, convenient carrying and strong practicability, and has the capability of completing the functions of 'black box' equipment of airplanes, ships, underwater vehicles and the like.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a block diagram of an acoustic beacon system;
FIG. 2 is a block diagram of an underwater acoustic beacon system;
FIG. 3 is a schematic diagram of the operation of the system with the long standby value under water;
FIG. 4 is a schematic diagram of the operation of an underwater plasma sound source system;
FIG. 5 is a logic functional diagram of an acoustic beacon system;
fig. 6 is a diagram of an example of an application of the acoustic beacon system.
In the figure:
1-an underwater receiving transducer; 2-water-in detection electrode (metal screw); 3-a signal conditioning circuit board; 4-a signal processing circuit board; 5-a power supply battery of the system is more provided with an underwater long-time standby value; 6-a power supply battery of the underwater plasma beacon transmitting system; 7-a control unit circuit board; 8-a high voltage generation module; 9-grounding wire; 10-an energy storage capacitor; 11-triggering a switch; 12-a plasma discharge electrode core; 13-a plasma discharge electrode insulating layer; 14-a plasma discharge electrode; 15-locking the metal seat by a discharge electrode screw; 16-spring copper sleeve; 17-watertight compartment (metal housing); 18-a first metal separator; 19-a second metal separator; 20-a watertight compartment high-strength insulating end cover; 21-watertight connector; 22-value more bins; 23-charging bay section; 24-energy storage cabin section.
Detailed Description
The following detailed description of embodiments of the invention is exemplary and intended to be illustrative of the invention and not to be construed as limiting the invention.
Aiming at the defects of the existing underwater acoustic beacon, the embodiment provides a long-time standby long-distance underwater strong-acoustic pulse beacon system, and the capability of long-time working and long-distance beacon signal propagation of the underwater acoustic beacon is realized by a mode that an underwater long-time standby value is higher and an underwater plasma beacon transmitting system is matched with the underwater plasma beacon transmitting system. This will greatly increase the search efficiency and probability, enhancing the practicality of the underwater acoustic beacon system.
The long-standby long-distance underwater intense sound pulse beacon system provided by the embodiment is shown in a diagram in fig. 2, and consists of an underwater long-standby value system and an underwater plasma beacon transmitting system.
The underwater long-term standby value system receives and detects a wake-up signal sent by the search device, so that the underwater strong sound pulse beacon system is in a sounding and position indicating working mode. And when the wake-up signal is not received, the underwater hard sound pulse beacon system is in a standby sleep mode. Therefore, the existence of the underwater long-term standby value system greatly increases the underwater working time of the underwater intense sound pulse beacon system. The underwater plasma beacon transmitting system completes the transmission of plasma pulse acoustic signals, and the transmitting sound source is high (> 220 dB), so that the propagation distance of signals of the underwater intense pulse beacon system is enhanced. The underwater long-term standby value system and the underwater plasma beacon transmitting system are connected in a watertight manner structurally through the mode of fixing and butting the cabin sections, an integrated system is formed, the cabin sections are connected through a serial data bus, internal communication is carried out through a serial communication mode, and the process of transmitting a work enabling signal to the underwater long-term standby value system by the underwater plasma beacon transmitting system is completed.
Fig. 1 is a block diagram of an acoustic beacon system, in combination with fig. 2. The underwater plasma beacon transmitting system and the underwater long-term standby value more system use a serial communication mode to communicate inside the two systems. The serial communication line used for serial communication passes through the second metal isolation plate 19, so that the capability of sending a corresponding enabling signal for operation by the underwater long-time standby value system to the underwater plasma beacon transmitting system is provided. In addition, the two systems are connected inside the cabin section through a digital I/O circuit, and the circuit penetrates through the second metal isolation plate 19, so that the power-on control of the underwater plasma beacon transmitting system by the underwater long-time standby value system is completed.
The underwater long-term standby value further system comprises a water detection electrode 2, a receiving transducer 1 and a value further cabin section 22.
The water inlet detection electrode 2 is introduced into the inside of the value-increasing cabin section 22 by using a mode of screwing and locking a metal screw through an end cover 20 (also the end cover on one side of the cabin body of the whole watertight cabin 17) on the outer side of the value-increasing cabin section 22, and is processed by using an insulating high-strength material, so that the output of the water inlet detection electrode 2 is introduced into the inside of the value-increasing cabin section 22 through the metal screw. The insulating end cover outside the cabin section is a watertight cabin high-strength insulating end cover 20 so as to facilitate the insulating fixation of the water inlet detection electrode 2 on the end cover. When the underwater acoustic beacon enters water, the two underwater detection metal screws are short-circuited through seawater, and the underwater detection signals are transmitted into the cabin section through the metal screws, so that the underwater long-term standby value system has the underwater detection function.
The receiving transducer 1 is connected with the value-added section 22 by using the watertight connector 21 and watertight cable through the end cover 20 (also the end cover on one side of the whole watertight compartment body and processed by using insulating high-strength materials) on the outer side of the value-added section 22, so that the output of the receiving transducer 1 is led into the value-added section 22 through the watertight connector 21 and watertight cable through the watertight compartment high-strength insulating end cover 20. The receiving transducer 1 plays a role of receiving underwater sound waves, and the process of converting underwater sound signals into electric signals is completed, and the receiving transducer 1 adopts a deep water transducer so as to have the working capacity of a deep water region (which can be as deep as 7000 m). The process of inputting the externally received acoustic signal to the watertight compartment 17 through the watertight connector 21 is completed.
The end covers penetrated by the receiving transducer 1 and the water inlet detection electrode 2 are insulating end covers 20 outside the cabin section, and the receiving transducer and the water inlet detection electrode 2 are outside the cabin section 22.
The value-added section 22 includes a value-added cabin body and an underwater long-term standby value-added cabin system. The cabin body provides a stable and independent working environment for the long-time standby value system under water. The underwater long-term standby value more cabin internal system exists in the cabin body of the cabin, and the system function of the underwater long-term standby value more system is realized together with the receiving transducer 1 and the water inlet detection electrode 2, so that the signal receiving and processing of the underwater long-term standby value more system are completed.
The underwater long-time standby value cabin-more system comprises a water detection unit, a value power-more unit, a signal conditioning unit and a signal processing unit. The water detection unit, the value-added power supply unit, the signal conditioning unit and the signal processing unit are all located inside the value-added cabin section 22. FIG. 3 is a schematic diagram of the operation of the system with the long standby value under water. The water inlet detection electrode 2 inputs a real-time electrode short circuit signal to a water inlet detection unit in the cabin section 22, and the water inlet detection unit receives the water inlet detection signal transmitted from the outside of the cabin by the water inlet detection electrode 2, judges whether the system is in water or not, and further controls whether the power supply unit supplies power or not. The value-added power supply unit supplies power to all units in the whole value-added cabin and is controlled by the water inlet detection unit. The receiving transducer 1 performs acoustic-electric conversion on the received underwater acoustic signal to be converted into an electric signal, and the electric signal is input into the value-comparing section 22 through the end cover 20 of the value-comparing section 22 by using the watertight connector 21, and the watertight cable is directly connected with the signal processing unit circuit board 4, so that the received transducer signal is input into the underwater long-term standby value-comparing system. The signal conditioning unit receives the input signal from the external transducer 1 received by the watertight compartment 22, and sends the input signal to the signal processing unit through amplification and filtering. The signal processing unit analyzes and judges the signal, if the signal is judged to receive the wake-up signal, the parameters of the underwater plasma beacon transmitting system are set through a serial communication bus (RS-232 or RS-485 and the like), and the operation of different modes is carried out. The water inlet detection unit receives water inlet detection signals transmitted from the outside of the cabin by the water inlet detection electrode 2, judges whether the system is in water or not, and further controls whether the power supply unit supplies power or not.
The water inlet detection unit is arranged on the signal processing unit circuit board 4, and the water inlet detection electrode 2 is directly connected with the signal processing unit circuit board 4 through a data line, so that a water inlet detection signal is sent to the water inlet detection unit. The water inlet detection unit comprises an amplifier and a comparator. The signal of the water inlet detection electrode 2 is amplified to a level which can be judged by the comparator through the amplifier, and then the comparator judges the amplified signal to judge whether the system is in water or not.
The value-added power supply unit comprises a group of storage batteries 5 and a voltage conversion chip circuit, and the storage batteries 5, the voltage conversion chip on the processing unit circuit board 4 and an accessory circuit form the value-added power supply unit together. The power-on enabling end of the water inlet detection unit is connected to the value more power supply unit. Under the control of the water inlet detection unit, the value-more power supply unit supplies power to other units in the value-more cabin section 22 through the voltage conversion chip. The output of the value-adding power supply unit is connected to the power supply end of the signal conditioning unit of the signal filtering, amplifying and conditioning circuit board 3 and the power supply end of the signal processing unit on the signal processing unit circuit board 4. Typically, batteries have limited energy storage and the load carrying capacity decreases as the internal resistance of the battery increases as the battery discharges. Therefore, a mode of combining a plurality of batteries in series-parallel connection is adopted to meet the voltage and current requirements of a system, and then the voltage conversion chip is used for carrying out voltage conversion and voltage stabilization to supply power to the later stage of the power supply unit with higher value. The combination of the used batteries 4 and 2 strings realizes 6-7.5V power supply, and ensures that the underwater working time of the underwater acoustic beacon exceeds 90 days.
The signal conditioning unit is arranged on the signal conditioning circuit board 3, the output of the value-more power supply unit is connected to the signal conditioning circuit board 3, the input end of the value-more power supply unit is connected with the receiving transducer 1 through a watertight cable, and the output end of the value-more power supply unit is connected with the signal processing unit circuit board 4 through a signal wire. The signal conditioning unit receives an input signal from the external transducer of the watertight compartment 17, performs amplification and filtering processing through a filter and a signal amplifier, performs analog-to-digital conversion through an ADC, and then sends the signal to the signal processing unit. The signal processing unit analyzes and judges the signals. If the wake-up signal is received, setting parameters of an underwater plasma beacon transmitting system through a serial communication bus (RS-232 or RS-485 and the like) to perform different modes of work. The signal conditioning unit includes a filter and a signal amplifier. The amplifier performs impedance matching with the receiving sensor, amplifies the received signal to the sampling voltage requirement, and simultaneously filters out-of-band noise, so as to ensure higher out-of-band attenuation; and has a larger gain adjustable range, higher channel consistency and working stability.
The signal processing unit is seen on the signal processing unit circuit board 4, the value more power supply unit is connected to the power supply end of the signal processing unit on the signal processing unit circuit board 4, the output of the signal conditioning circuit board 3 is connected to the signal input end of the signal processing unit on the signal processing unit circuit board 4, and the other end of the signal conditioning circuit board is connected with the control unit circuit board 7 through the second metal isolation board 19 by a serial communication interface (RS-232 or RS-485 and the like) data line and an I/0 enabling control data line. The signal processing unit uses a low power consumption MCU chip with DSP capability, such as an MSP430F54xx series low power consumption chip (the chip itself has very low power consumption, in the order of mW), to reduce unnecessary energy consumption as much as possible. The minimum system circuit (including ADC module), TTL-232 level conversion chip and accessory circuit, voltage conversion chip and accessory circuit of MCU are integrated on the circuit board 4 of signal processing unit. The signal processing unit performs the following functions: 1) Detecting different wake-up signals, realizing communication with a plasma pulse sound source system by using an RS-232 interface and a level protocol specification, and sending different types of wake-up signals to the plasma pulse sound source system; 2) And the power-on control of the power supply unit of the plasma pulse sound source system is completed through the digital I/0. The signal processing unit comprises a data acquisition unit and a data processing unit. And the signal transmitted by the signal conditioning unit is subjected to A/D (analog-to-digital) conversion by using an ADC (analog-to-digital) module, changed into a digital signal and buffered to the MCU chip, and then the data processing unit MCU chip analyzes and processes the data in the buffer area. Therefore, different charging modes and working parameters are set according to different receiving signals, and the working mode of the system is sent to the plasma pulse sound source system through a serial communication interface (RS-232 or RS-485 and the like).
The underwater plasma beacon transmitting system comprises a charging cabin section 23, an energy storage cabin section 24 and a plasma discharge electrode 14. The charging cabin section 23 and the energy storage cabin section 24 are separated by a first metal separation plate and are fastened by a watertight structure locked by screws. The plasma discharge electrode 14 passes through the end cover on the outer side of the energy storage cabin section 24 (also the end cover on the other side of the whole watertight cabin body) in a screw-in locking mode, so that a unified watertight structure is formed with the energy storage cabin section 24. Inside the energy storage cabin section 24, the plasma discharge electrode core 12 is inserted into the spring copper sleeve 16, the elastic characteristic of the spring copper sleeve 16 is used for ensuring close connection with the electrode core 12, and high voltage is output to the positive electrode and the negative electrode of the discharge electrode, so that good contact is ensured, and the plasma discharge electrode has good current passing capability. The high-voltage output interface of the energy storage cabin section 24 is output to the anode and the cathode of the discharge electrode 14 in a mode of being connected through the spring copper sleeve 16, wherein the connection mode of screwing and locking a screw is a fixed watertight structure. The discharge part of the plasma discharge electrode 14 is positioned outside the energy storage cabin 24, the plasma discharge electrode 14 obtains high voltage from the energy storage cabin 24, and the final underwater plasma electroacoustic conversion process, namely the generation point of the 'hydro-electric effect', is completed at the discharge tip of the plasma discharge electrode, so that intense sound pulses are generated and radiated to all directions through the water medium.
A plasma discharge electrode 14. The plasma discharge electrode 14 is composed of an electrode core 12 at the innermost layer, a glass fiber insulation material 13 at the secondary outer layer, and a metal layer 15 at the outermost layer for sealing with a screw structure in butt joint with a watertight compartment 17. This ensures that the discharge electrode and the watertight compartment 17 made of metal are watertight combined, and prevents spontaneous discharge leakage between the electrode core 12 and the watertight compartment 17 due to a large voltage. It is necessary to ensure that the discharge phenomenon occurs at the "tip-to-tip" position of the discharge electrode 14 so that a plasma pulse discharge under artificial control can be generated. In addition, the plasma discharge electrode core 12 is inserted into the spring copper sleeve 16 to be tightly connected with the high-voltage output interface of the energy storage cabin section, the elastic characteristic of the spring copper sleeve 16 is used for ensuring the tight connection with the electrode core 12, and the current-recuperating capability of large current is ensured, so that high voltage is output to the anode and the cathode of the discharge electrode. The common electrode types are arc discharge and corona discharge. Because the device is designed to have a sound source level target above 210dB, a 'tip-tip' arc discharge electrode 14 is selected that produces a strong sound pulse effect. The material has high strength, high discharge efficiency and corrosion resistance, such as copper-tungsten alloy. The plasma discharge electrode 14 is a strong acoustic signal generating component, namely, a process of completing underwater plasma electroacoustic conversion, and is also a key component of the whole underwater acoustic beacon. In operation, when the trigger switch 11 is turned on, the energy stored in the energy storage capacitor 10 is fully applied to the discharge gap of the discharge electrode 14 to form high-voltage discharge of the underwater plasma, so that huge pulse current, strong shock wave pressure and acoustic effect are generated, and an acoustic pulse signal is transmitted through the water medium.
The charging cabin section 23 and the energy storage cabin section 24 are provided with a charging cabin body and an energy storage cabin body, and the charging cabin body and the energy storage cabin body provide a stable and independent working environment for the underwater plasma beacon transmitting system. The underwater plasma beacon transmitting in-cabin system exists in the charging cabin body and the energy storage cabin body and jointly realizes the function of the underwater plasma beacon transmitting system with the plasma discharging electrode 14.
The underwater plasma beacon emission cabin system comprises an emission power supply unit, a control unit, a high-voltage generation unit, an energy storage unit and a triggering unit. Fig. 4 is a schematic diagram of the operation of the underwater plasma sound source system. The emission power supply unit, the control unit and the high voltage generation unit are positioned in the charging cabin section 23, and the energy storage unit and the triggering unit are positioned in the energy storage cabin section 24. Under the control of digital I/O (input/output) enabling of a system with a long-term underwater standby value, the transmitting power supply unit stabilizes the 6-7.5V direct current voltage provided by the storage battery 6 to 3V direct current through the voltage conversion chip and supplies power to the control unit and the high-voltage generation unit after stabilizing the voltage; the control unit uses serial ports to control different working mode parameters through serial data buses (RS-232 or RS-485 and the like), generates a control signal of the transmitting power supply unit, and controls the output voltage of the transmitting power supply unit so as to control the power supply voltage of the high-voltage generating unit to control the charging rate, thereby controlling the discharging period. The output of the high voltage generating unit is connected to the energy storage unit to form a charging loop so as to finish the charging process for energy storage. The trigger unit and the energy storage unit are connected with the plasma discharge electrode 14 outside the cabin to form a discharge loop, so that the plasma discharge electrode 14 is discharged after the high-voltage loop is formed, the 'hydro-electric effect' can be formed on the ion body pulse discharge electrode 14, the final underwater plasma electroacoustic conversion process is finished, a pulse sound signal (the signal sound source level is more than 220 dB) is generated, the intense sound pulse signal is radiated to all directions through an aqueous medium, and the signal propagation distance is greatly increased and can even reach 10km level.
The emission power supply unit comprises a group of storage batteries 6 and a voltage conversion chip circuit, and the storage batteries 6, the voltage conversion chip on the control unit circuit board 7 and an accessory circuit form a power supply unit together. Under the control of the underwater long-time standby value more system digital I/0 enabling end, the voltage conversion chip is used for carrying out voltage conversion and then supplying power to the control unit and the high-voltage generating unit. The storage battery 6 in the transmitting power supply unit is limited in energy storage, can sustain discharge only for ten times, and as the internal resistance of the battery discharge increases, the load carrying capacity decreases, resulting in a longer charging time. Therefore, a mode of combining a plurality of batteries in series-parallel connection is adopted to meet the voltage and current requirements of a system, and then the voltage conversion chip is used for carrying out voltage conversion and voltage stabilization to supply power to the high-voltage generating unit and the control unit.
The control unit is seen on the control unit circuit board 7, the output of the storage battery 6 is directly connected to the control unit circuit board 7, the control unit circuit board 7 is also connected with the low-voltage input end of the high-voltage generating module 8 of the high-voltage generating unit, and the other end of the control unit is connected with the signal processing unit circuit board 4 by penetrating the second metal isolation board 19 through the output of the RS-232 interface and using a signal wire. The control unit uses a low-power consumption MCU, such as MSP430G25xx series low-power consumption chip (the power consumption of the chip is extremely low and is in mW level), so as to reduce unnecessary energy loss as much as possible. The low power consumption MCU minimum system circuit, TTL-232 level conversion chip and accessory circuit, voltage conversion chip and accessory circuit are integrated on the control unit circuit board 7. The control unit performs the following functions: 1) Communication with the underwater long-term standby value system is realized by using an RS-232 interface and a level protocol specification, so that different types of wake-up signals sent from the underwater long-term standby value system are obtained; 2) The output voltage of the voltage conversion chip is controlled, and then the working voltage of the high-voltage generation unit is controlled, so that the discharge frequency of the high-voltage pulse is controlled, and the generation frequency of the intense sound pulse is controlled.
The high voltage generation unit is responsible for charging the energy storage unit and comprises a high voltage generation module 8. The low voltage input of the high voltage generation module 8 is connected to the control unit circuit board 7. The positive cable of the high-voltage output end of the high-voltage generating module 8 starts from the charging cabin, passes through the first metal isolation plate 18, enters the energy storage cabin and is connected with the positive electrode of the energy storage capacitor 10, and the negative electrode of the high-voltage generating module 8 is connected with the grounding wire 9. The ground wire 9 may also be connected to the charging pod body of the charging pod section 23 or directly use the charging pod body of the charging pod section 23 as a common ground wire. In this case, the charging cabin body of the charging cabin section 23, that is, the cabin body of the watertight cabin 17 is required to have good electrical conductivity. As shown in fig. 4, under the control of the control unit, the transmitting power supply unit supplies power to the transmitting power supply unit, the transmitting power supply unit generates direct current low voltage power, and generates low voltage pulse by high frequency oscillation in the high voltage generating module 8, when the pulse transformer is boosted to a preset voltage value, pulse rectification is performed to obtain high voltage direct current, so as to charge the energy storage capacitor 10 of the energy storage unit.
The energy storage unit comprises 1 high-quality energy storage capacitor 10 with withstand voltage 10kV capacity of 1uF, and the energy storage capacitor 10 is fixed in an energy storage cabin through a capacitor fixing frame in a screw fastening mode. As shown in fig. 1, the negative electrode of the energy storage capacitor 10 is connected with the capacitor fixing frame and grounded 9, namely connected to the tank body of the energy storage tank 24 section, namely the tank body of the watertight tank 17, and the negative electrode of the energy storage capacitor 10 is connected with the negative electrode cable at the output end of the high voltage generating unit and is fastened with one end of the high voltage electrode of the trigger switch 11 of the trigger unit. The energy storage unit is used for accumulating high-voltage energy of underwater plasma discharge and consists of a high-temperature-resistant high-voltage-resistant noninductive heterogeneous pulse capacitor. It must be realized by a pulse capacitor with small parasitic inductance, and a large discharge current (usually more than 10 kA) can be ensured to be generated, so that the generation of intense sound pulse can be ensured. The capacity, voltage resistance, temperature resistance and other electrical characteristics of the energy storage unit and the process control of charging and discharging the energy storage unit are directly related to the final effect of the whole system.
The trigger unit comprises a high-voltage air trigger switch 11, and the structure, the profile, the parameters and the characteristics of the trigger switch have the most direct and most sensitive influence on the rising time, the amplitude and other performance parameters of the pulse. The trigger switch 11 is a bipolar plate air trigger switch 11 (field distortion spark gap switch, self-triggering mode). The method has the advantages of simple processing, low cost, short conduction time, low trigger voltage requirement, stable operation and the like, and is widely applied. The high-voltage electrode of the trigger switch 11 is fastened with the positive electrode of the energy storage capacitor 10, and the high-voltage electrode of the trigger switch 11 is fastened with the discharge electrode core 12 through a spring copper sleeve 16 connecting part and then connected with an output electrode interface. The trigger switch 11 functions as: 1) The triggering gap can separate the charging loop from the discharging loop, so that the charging process is ensured to be completed smoothly; 2) When the capacitor is charged, the trigger gap is rapidly conducted, so that the energy stored by the energy storage capacitor 10 is instantaneously added to the main gap of the discharge electrode 14.
The three cabin sections of the value-increasing cabin section 22, the charging cabin section 23 and the energy storage cabin section 24 jointly form the structure of the underwater sound beacon watertight cabin 17 in fig. 1 and 2. One end of the charging cabin section 23 is an energy storage cabin section 24, and the other end is a value comparison cabin section 22. The charging bay 23 is separated from the energy storage bay 24 by a first metal separator 18. The charging bay 22 is separated from the charging bay 23 by a second metal separator 19. The underwater long-term standby value further system comprises a value further cabin section 22, and the underwater plasma beacon transmitting system comprises a charging cabin section 23 and an energy storage cabin section 24. The three cabins are separated by a metal partition board and are fastened by a watertight structure, so that an integrated watertight cabin 17 structure is formed. The structural arrangement shields electromagnetic interference and provides a stable internal environment for the normal operation of the various components of the acoustic beacon. Meanwhile, the adoption of the sectional type modularized cabin section is convenient for the assembly, the use and the maintenance of the beacon.
The watertight compartment 17 of the acoustic beacon is used to isolate the outside seawater and provide a stable working environment for the systems within the acoustic beacon. The metal shell of the watertight compartment 17 is subjected to oxidation coating paint spraying treatment, so that the corrosion resistance of the system in seawater is improved, and the long-time working environment of the system in water is ensured to be stable. The watertight cabin 17, the receiving transducer 1, the plasma discharge electrode 14 and the water inlet detection electrode 2 are tightly connected to form a completely watertight structure.
The working principle of the underwater intense sound pulse beacon system is as follows:
as shown in fig. 1-6, after a problem occurs with an aircraft or ship, the underwater hard-pulse beacon system enters the water. Then the water inlet detection electrode 2 is contacted with seawater, and a passage is formed between the two electrodes of the water inlet detection electrode 2 through the conductivity of seawater medium. Therefore, the water inflow detection signal is transmitted to the signal processing unit through the water inflow detection electrode 2, and the signal processing unit receives the water inflow signal, so that the whole underwater long-time standby value starts to work more systematically.
At this time, the underwater receiving transducer 1 continuously converts the underwater sound signal received from the surrounding water environment into an electrical signal, which is transmitted into the watertight compartment 17 through the watertight cable. The continuous electric signal received at this time is filtered and amplified by the signal conditioning unit to become an analog signal sampled by the ADC module with proper amplitude of the bandpass. And then analog-to-digital conversion is carried out through sampling of the ADC module, and the digital signals are converted into digital signals and are transmitted to a signal processing system. The signal processing system performs real-time FFT signal processing and digital filtering processing on the continuously arriving digital signal, and collates the processing results. And if the processing result meets the arrival condition of the wake-up signal, indicating that the real-time wake-up signal is received. At this time, the signal processing system divides and distinguishes the incoming wake-up signal, so as to determine the working mode of the plasma pulse sound source system, such as the discharge working period.
After the working mode is determined, the signal processing system transmits the processing result to the plasma pulse sound source system through an RS-232 serial communication mode. When the plasma pulse sound source system receives the corresponding processing result, the working mode information in the middle is acquired, so that autonomous working is started, and the strong sound pulse signal is continuously emitted and radiated to all directions through the water medium.
During this time the receiving transducer 1 also continues to receive underwater acoustic signals to determine the receipt of a next set of different wake-up signals for changing the operation mode of the underwater acoustic beacon.
In view of the above system operating principle. The application method of the whole system is that
The underwater intense sound pulse beacon system is accidentally or manually put into water, and the system starts to work. At this time, the searcher only needs to send a wake-up signal with a fixed format on the water surface through a high-power signal sending system (the limitation of the power consumption and the volume of the water surface equipment is small). And then receiving underwater strong sound signals by using various relatively mature searching modes and devices, such as a towing array. Therefore, the detectable range of the underwater acoustic beacon is greatly increased, the searching efficiency is improved, and convenience is brought to searching.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention.
Claims (5)
1. A long standby long-range underwater intense sound pulse beacon system, characterized in that: the system comprises an underwater long-time standby value system and an underwater plasma beacon transmitting system;
the underwater long-time standby value system comprises a water inlet detection electrode, a receiving transducer and a value cabin section;
the water inlet detection electrode penetrates through the insulating end cover at the outer side of the cabin section to extend into the cabin section by using a metal screw in a screwing mode, so that the output of the water inlet detection electrode is introduced into the cabin section by the metal screw;
the receiving transducer is connected with the value-added cabin section through an insulating end cover at the outer side of the value-added cabin section by using the watertight connector and the watertight cable, so that the output of the receiving transducer is introduced into the value-added cabin section through the watertight cable;
the receiving transducer and the end cover penetrated by the water inlet detection electrode are insulating end covers at the outer side of the cabin section, and the receiving transducer and the water inlet detection electrode are both positioned at the outer side of the cabin section;
the value-added cabin section comprises a value-added cabin body and an underwater long-time standby value-added cabin system; the cabin body provides a stable and independent working environment for the underwater long-time standby value system; the system in the underwater long-term standby value-changing cabin is arranged in the cabin body of the value-changing cabin, and the system functions of the underwater long-term standby value-changing system are realized together with the receiving transducer and the water inlet detection electrode, so that the signal receiving and processing of the underwater long-term standby value-changing system are completed;
The underwater long-time standby value cabin-more system comprises a water inlet detection unit, a value power-more unit, a signal conditioning unit and a signal processing unit; the water inlet detection unit receives a water inlet detection signal transmitted from the outside of the cabin by the water inlet detection electrode, judges whether the system is water inlet or not, and further controls whether the power supply unit supplies power or not; the value-added power supply unit supplies power to other units of the whole value-added cabin system and is controlled by the water inlet detection unit; the output signal of the receiving transducer is input to a signal conditioning unit, the signal conditioning unit amplifies and filters the signal and then sends the signal to a signal processing unit, the signal processing unit analyzes and judges the signal, if the signal is judged to be received as a wake-up signal, parameters of an underwater plasma beacon transmitting system are set through a serial communication bus, and different modes of operation are carried out;
the underwater plasma beacon emission system comprises a charging cabin section, an energy storage cabin section and a plasma discharge electrode; the charging cabin section and the energy storage cabin section are separated by a metal partition board and are fastened by a watertight structure locked by screws;
the plasma discharge electrode passes through the end cover at the outer side of the energy storage cabin section in a screw screwing and locking mode and is tightly connected with the high-voltage output interface of the energy storage cabin section in a spring copper sleeve connection mode, so that high voltage can be output to the anode and the cathode of the plasma discharge electrode; the discharge part of the plasma discharge electrode is positioned in water outside the energy storage cabin, the plasma discharge electrode obtains high voltage from the energy storage cabin, the final underwater plasma electroacoustic conversion process is completed at the discharge tip of the plasma discharge electrode, and strong sound pulses are generated and radiated out in all directions through an aqueous medium;
The charging cabin section comprises a charging cabin body, the energy storage cabin section comprises an energy storage cabin body, and the charging cabin body and the energy storage cabin body provide a stable and independent working environment for the underwater plasma beacon transmitting system; the underwater plasma beacon transmitting cabin system is arranged in the charging cabin body and the energy storage cabin body and jointly realizes the function of the underwater plasma beacon transmitting system with the plasma discharging electrode;
the underwater plasma beacon emission cabin system comprises an emission power supply unit, a control unit, a high-voltage generation unit, an energy storage unit and a trigger unit;
the emission power supply unit, the control unit and the high-voltage generation unit are positioned in the charging cabin body, and the energy storage unit and the triggering unit are positioned in the energy storage cabin body; the transmitting power supply unit supplies power to the control unit and the high-voltage generation unit after voltage conversion through the voltage conversion chip under the control of digital I/O (input/output) enabling of a system with a long-term underwater standby value; the control unit receives different working mode parameters sent by the underwater long-time standby value more system through the serial communication bus, generates a control signal of the transmitting power supply unit, and controls the output voltage of the transmitting power supply unit, so as to control the power supply voltage of the high-voltage generating unit to control the charging rate and further control the discharging period; the energy storage unit is connected with the high-voltage generation unit for storing electric energy; the triggering unit and the energy storage unit are connected with the plasma discharge electrode outside the cabin and are in the same loop, so that the high-voltage discharge loop is formed to discharge the plasma discharge electrode, and a pulse sound signal is generated;
The underwater long-time standby value system receives and detects a wake-up signal sent by the search device, the underwater strong sound pulse beacon system is in a sounding and position indicating working mode according to the wake-up signal, and when the wake-up signal is not received, the underwater strong sound pulse beacon system is in a standby sleep mode;
the underwater plasma beacon transmitting system completes the transmission of plasma pulse acoustic signals, and the transmitting sound source level is more than 220dB;
the underwater long-term standby value system and the underwater plasma beacon transmitting system are connected in a watertight manner structurally through the mode of fixing and butting the cabin sections, an integrated system is formed, the cabin sections are connected through a serial data bus and/or a digital I/O circuit, internal communication is carried out, and the underwater long-term standby value system is used for powering on the underwater plasma beacon transmitting system and transmitting a work enabling signal.
2. A long standby long range underwater megasonic beacon system in accordance with claim 1 wherein: the underwater wake-up signal of the underwater hard-sounding pulse beacon system has two modes: in the first mode, the carrier-based plasma intense sound source with the same specification is used for transmitting intense sound pulses with the same time interval, and after the underwater intense sound pulse beacon system receives the intense sound pulses transmitted from the water surface with the same time interval, the system wakes up to finish signal transmission with symmetrical intensity; the plasma strong sound source with the same specification is the same as the plasma strong sound source in the underwater plasma beacon transmitting system; in the second mode, the carrier-based common underwater sound emission transducer is used for emitting signals with a set composition format, so that fine control of the underwater intense sound pulse beacon system is completed, and the control of the working period and the sleeping period of the underwater intense sound pulse beacon system is included; different intense sound pulse signals from the response of the underwater intense sound pulse beacon system are obtained at different stages of searching the underwater intense sound pulse beacon system, so that the searching efficiency of the beacon is improved.
3. A long standby long range underwater megasonic beacon system in accordance with claim 1 wherein: the water inlet detection unit comprises an amplifier and a comparator; the water inlet detection electrode signal is amplified to a level which can be judged by the comparator through the amplifier, the comparator judges the amplified signal, whether the system is water inlet or not is judged, and whether the power supply unit supplies power or not is controlled; the value-added power supply unit is powered by a storage battery, and a plurality of batteries are combined in series-parallel to generate voltage and current meeting the system requirement; under the control of the water inlet detection unit, the value-more power supply unit supplies power to other units of the system in the value-more cabin through the voltage conversion chip; the signal conditioning unit comprises a band-pass filter and a signal amplifier; after being processed by a band-pass filter, the received transducer signals are transmitted to a signal amplifier for signal amplification processing, and then are transmitted to a signal processing unit; the signal processing unit comprises a data acquisition unit and a data processing unit; the data acquisition unit performs AD conversion on the signals transmitted by the signal conditioning unit, and the signals are converted into digital signals and buffered; the data processing unit analyzes and processes the data, judges whether a corresponding wake-up signal is received, controls a power supply unit enabling end of the underwater plasma beacon transmitting system through the digital I/O port, and controls working parameters of the underwater plasma beacon transmitting system through the serial data bus.
4. A long standby long range underwater megasonic beacon system in accordance with claim 1 wherein: the emission power supply unit is powered by storage batteries, a plurality of storage batteries are combined in series-parallel to meet the voltage and current requirements of the system, and the high-voltage generation unit and the control unit are powered by a voltage conversion chip under the enabling control of the underwater long-time standby value more system digital I/O; the high-voltage generating unit generates high-frequency oscillation pulses under the control of the control unit, and the high-frequency oscillation pulses are boosted to a preset voltage value through the pulse transformer, and high-voltage direct current is obtained after pulse rectification to charge the energy storage unit; the energy storage unit consists of an energy storage capacitor, the energy storage capacitor is fixed in the energy storage cabin body through a capacitor fixing frame in a screw fastening mode, the negative electrode of the energy storage capacitor group is connected with the capacitor fixing frame and grounded, the positive plate is connected with a positive cable at the output end of the high-voltage generating unit, and the positive plate is fastened with a high-voltage electrode of the triggering unit; the trigger unit consists of a trigger switch, and the trigger switch adopts a bipolar plate air trigger switch; the high-voltage electrode of the trigger switch is fastened with the positive electrode of the energy storage capacitor, and the low-voltage electrode of the trigger switch is fastened with the connecting component of the discharge electrode core.
5. A long standby long range underwater megasonic beacon system in accordance with claim 1 wherein: the charging cabin section, the energy storage cabin section and the value comparison cabin section form a watertight cabin structure of the underwater sound beacon together; one end of the charging cabin section is an energy storage cabin section, and the other end of the charging cabin section is a value comparison cabin section; the underwater long-time standby value system comprises a value comparison cabin section, and the underwater plasma beacon transmitting system comprises a charging cabin section and an energy storage cabin section; the three cabins are separated by a metal partition board and are fastened by a watertight structure, so that an integrated watertight cabin structure is formed; the underwater acoustic beacon watertight cabin structure is used for isolating outside seawater and providing a stable working environment for each system in the underwater intense acoustic pulse beacon system; the watertight cabin structure of the underwater acoustic beacon, the receiving transducer, the plasma discharge electrode and the water inlet detection electrode are tightly connected to form a complete watertight structure.
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