Drop-off umbrella relay sonar

Abstract

The application provides a water launching umbrella type relay sonar device, which comprises a radio part, a sonar part and a shell structure; the shell structure contains the radio part and the sonar part; the radio part is located above the sonar part; the radio part realizes two-way transmission with the sonar part through a cable; the sonar part comprises a vertical sonar part and a horizontal sonar part; the vertical sonar part and the horizontal sonar part form a three-dimensional detection system to calculate the position and depth of an underwater target. The application can form a three-dimensional detection system by using vertical and horizontal sonar structures to calculate the position, depth and distance of an underwater target; the radio part can realize long-distance communication with a mother ship, transmit uplink sonar information and transfer downlink operation instructions, which helps to solve the distance position and blind area restraint and realizes better effect; and the application does not depend on the complex installation of a ship and has the characteristics of flexible layout, and can be arranged separately or combined by using the assisted flying type and the launching type.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of underwater acoustic detection, and particularly relates to an open-umbrella type relay sonar device for underwater acoustic detection. BACKGROUND

[0002] Generally speaking, the detection distance of a ship sonar system is usually only a few nautical miles, and the ship sonar system can usually only detect the direction, but cannot detect the distance of the target and the depth of the target. In addition, there are blind areas and weak areas at the bow and stern of the ship, which restrict the long-distance detection in the front and rear directions.

[0003] Patent document CN111025302A discloses an intelligent shipborne underwater acoustic positioning device, system and positioning method. The positioning system includes a shipborne short array, a signal processing device, and an underwater beacon. A transmitting transducer and a transmitting transducer are respectively arranged at the center position of the bottom of the shipborne short array and the water inlet end of the rigid connecting rod, and corresponding GPS antennas are arranged. The signal processing device is arranged in the data processing cabin on the working mother ship. The underwater beacon is arranged on the underwater target. The short array receives the synchronous / asynchronous underwater acoustic pulse signals emitted by the underwater beacon. After being processed by the signal processing device, the positioning information is drawn and displayed, and the continuous positioning can realize the tracking of the navigation track of the underwater target.

[0004] The patent document CN111025302A mentioned above constructs a set of underwater acoustic positioning method, aiming to improve the positioning accuracy, but is limited by the detection distance and the stereoscopic degree, and cannot construct a long-distance stereoscopic detection.

[0005] The present application can extend the width and depth of the detection range through the unique umbrella-shaped telescopic structure and functional layout of the device, and assist in the stereoscopic detection of a wider range and depth range. SUMMARY

[0006] In view of the defects in the prior art, the present application aims to provide an open-umbrella type relay sonar device for underwater acoustic detection.

[0007] According to the present application, an open-umbrella type relay sonar device for underwater acoustic detection is provided, which comprises a radio unit, a sonar unit, and a housing structure.

[0008] The housing structure accommodates the radio unit and the sonar unit.

[0009] The radio unit is located above the sonar unit.

[0010] The radio unit and the sonar unit are connected by a cable for bidirectional transmission.

[0011] The sonar part includes a vertical sonar part and a horizontal sonar part; the vertical sonar part and the horizontal sonar part form a three-dimensional detection system to calculate the position and depth of the underwater target.

[0012] Preferably, the vertical sonar part is suspended vertically on the sea surface after being launched into the water, adopts a cylindrical piezoelectric transducer for transmitting and receiving, detects the target and measures the distance at the same time, and works passively in the frequency range of 100 Hz-20 kHz; actively in the frequency range of 2k-5k, and the emitted acoustic wave is in pulse form.

[0013] Preferably, the horizontal sonar part adopts a cross-shaped line array which is parallel to the sea surface underwater; the horizontal sonar part is a passive sonar which only receives signals.

[0014] Preferably, the sonar signal is transmitted upward to the top of the radio part through the cable, converted into a radio signal by the water-floating radio transmitter, and then emitted through the surface antenna; subsequently, the radio receiver of the mother ship is used to demodulate the signal, and the relay detection function is completed through information processing.

[0015] Preferably, the mother ship sends relevant information through radio in the downward path, and the radio part realizes instruction demodulation and converts control of the sonar part.

[0016] Preferably, the shell structure adopts a water-tight material resistant to electromagnetic interference, and contains a surrounding suspension air bag and a depth-keeping water-tight cable; when water immersion is detected, the air bag is inflated quickly, the shell is opened, and the sonar part is hung underwater through the depth-keeping cable.

[0017] Preferably, the air bag is a ring-shaped air bag which can be expanded horizontally, and the depth-keeping cable is connected to the shell structure and the vertical sonar part longitudinally.

[0018] Preferably, the vertical sonar part is telescopic, and the horizontal sonar part is foldable.

[0019] After the vertical sonar part and the horizontal sonar part are fully extended, they jointly form an umbrella-shaped structure.

[0020] Preferably, the water-launched parachute-type relay sonar device is launched into the specified area by the rocket-assisted flight of the mother ship, and when the water immersion detection unit detects the preset water immersion feature, the relay turns on the power automatically.

[0021] Preferably, the mother ship accesses and controls the communication control module of the radio part of the water-launched parachute-type relay sonar device through a key, and then controls the sonar module to start the active and passive detection.

[0022] The sonar part calculates the position and depth of the underwater target, and then sends the result to the mother ship or the same type of device through the communication control module, and finally to the mother ship, which demodulates the information and then connects with the ship sonar system.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] 1. The present application can construct a three-dimensional detection system to calculate the position, depth and distance of the underwater target by using vertical and horizontal sonar structure.

[0025] 2. The present application can realize long-distance communication with the mother ship through the radio part, and transmit the uplink sonar information and the downlink operation instruction, which helps to solve the distance position and blind area restraint, and realizes better effect.

[0026] 3. The present application does not depend on the complex installation of the ship, and has the characteristics of flexible layout, which can be used for single layout or combined layout by using the flying type and the throwing type. BRIEF DESCRIPTION OF DRAWINGS

[0027] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the attached drawings:

[0028] Figure 1 The structure diagram of the underwater throwing parachute type relay sonar device provided by the present application is shown.

[0029] The drawings show:

[0030] DETAILED DESCRIPTION

[0031] The present application will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, a number of changes and improvements can be made. These all belong to the protection scope of the present application.

[0032] In the present application, the water-launched parachute-type relay sonar device is launched by the rocket-assisted launching of the mother ship into the designated area. When the water immersion detection unit of the water-launched parachute-type relay sonar device detects the preset water immersion feature (the resistance decreases to the set threshold), the relay turns on the power supply to automatically turn on the power. Subsequently, the mother ship accesses and controls the communication control module of the radio part of the water-launched parachute-type relay sonar device, thereby controlling the sonar module to turn on the active and passive detection. The sonar module performs A / D sampling and signal processing on the detection information, uses LOFAR, DEMON, HYFIX, CODAR, and DOPPLER-CPA combined detection and positioning analysis methods to solve the position and depth of the underwater target, and then sends the information to the mother ship or the same type of device for relay to the mother ship. The mother ship demodulates the information and then connects with the sonar system of the ship to better achieve long-distance relay detection performance without blind area.

[0033] Specifically, according to the water-launched parachute-type relay sonar device provided by the present application, the top part is a radio part, and the lower part is a sonar part. The sonar part is mainly composed of a vertical part and a horizontal part to form a three-dimensional detection system to solve the position and depth of the underwater target. The vertical part can be suspended vertically in the water, and this part uses a cylindrical piezoelectric transducer for transmitting and receiving, which can detect targets and measure distances at the same time. The passive working frequency band is 100Hz-20kHz, and the active frequency is 2k-5k. The emitted acoustic wave is in pulse waveform. According to the internal program, a cross-shaped line array can be opened in the horizontal part parallel to the sea surface underwater. The horizontal part is a passive sonar that only receives signals. The radio part realizes bidirectional transmission with the sonar part through a cable. The sonar signal is transmitted upward to the top water-floating radio transmitter through the cable and converted into a radio signal for modulation and transmission. The signal is transmitted through the water surface antenna, and then demodulated by the radio receiver of the mother ship. After information processing, the relay detection function is completed. In the downward path, the mother ship sends relevant information through radio, which is demodulated by the radio part of the device and converted to control the transmission of the sonar part. The components are as follows:

[0034] Housing structure: The container that assembles all components together is made of water-tight material resistant to electromagnetic interference and contains a surrounding suspension airbag and a depth-keeping water-tight cable. When water immersion is detected, the airbag inflates quickly, opens the airbag, and props open the housing. The sonar module is hung to a position 20 meters underwater through the depth-keeping cable.

[0035] Energy module: The energy module is divided into two parts. The main power supply part is powered by a built-in high-efficiency hydrogen fuel-powered lithium battery, which can provide several tens of hours of working endurance. The auxiliary power supply part is located on the surface of the radio part and is composed of a solar charging module, which provides additional power for endurance according to weather conditions.

[0036] Communication control module: located at the upper end of the shell structure, composed of communication antenna, radio modem module and control module. The communication antenna can be automatically controlled to extend 0.5-2 meters to prevent packet loss caused by sea waves. The modulation process is used for the sending end of the communication process, which converts analog signals or digital signals to be transmitted into signals suitable for channel transmission. Modulation can be achieved by changing the amplitude, phase or frequency of the carrier wave with the change of the signal amplitude. The baseband signal is extracted from the carrier wave to process the original signal to be transmitted. The mother ship is equipped with a communication control machine, which ensures the communication control between the mother ship and the device through the mutual modulation and demodulation communication process. The communication adopts FM composed of GMSK to reduce the sidelobe of the device radio signal, and encryption technology is introduced in the communication process to access and control through the key to ensure the safety of the communication. Advanced machine learning algorithms are used to process and analyze multi-modal signals in real time, automatically identify and propose environmental noise and other interference, and improve signal quality.

[0037] Positioning module: application of water-based Beidou positioning and underwater sonar positioning, combined with Beidou satellite-based differential measurement and geometric positioning method for positioning. A variety of sensors (such as acceleration, gyroscope, magnetometer, salinity meter, acoustic sensor, etc.) are integrated to realize positioning through multi-sensor data fusion technology. Information is reported to the mother ship in real time through the communication control module to report the accurate coordinate position of the device. The sonar positioning has a built-in adaptive environment compensation unit that collects ocean environmental parameters (such as water temperature, salinity, flow rate, etc.) and automatically adjusts the sonar positioning parameters according to the changes in environmental parameters to ensure the stability of the positioning accuracy.

[0038] Sonar module: controls the vertical and horizontal sonar transducers to actively transmit and passively receive. The horizontal and vertical sonar modules form a umbrella-shaped structure when fully extended, maximizing the detection range. The horizontal sonar module is composed of multiple sensor units, each containing a sensitive element and a signal conditioning circuit. The signal is A / D sampled and processed using LOFAR, DEMON, HYFIX, CODAR, and DOPPLER-CPA combination detection and positioning analysis methods. Through multi-beam synthesis and formation technology combined with deep learning algorithms, the azimuth, depth and distance of underwater targets can be calculated. The sonar module uses adaptive interference cancellation technology based on least mean square (LMS), which collects noise and vibration from sea waves through vector micro-noise sensors and micro-vibration sensors, and sends them as reference signals to the communication control module adaptive cancellation unit. Noise can be effectively suppressed through fusion modal algorithms.

[0039] Video module: equipped with a high-definition video camera and auxiliary lighting, the video image data is transmitted to the mother ship through the communication control module at the intersection of the horizontal sonar, which can assist in identifying target information visually. This module consumes a lot of power, which can be controlled by the mother ship to turn on or off as needed.

[0040] Theft-proof module: when the theft-proof module receives the theft-proof instruction of the communication control module control program, the program automatically assigns the internal data to all 0 to realize soft erasing, and at the same time, starts a strong current impact on the key module to physically damage it, activates the self-sinking function set in the module program, and pierces the air bag, so that the device sinks, preventing the program from being obtained by others.

[0041] Device anti-electromagnetic interference design: 1. Shielding is used to suppress the bidirectional radiation influence from the inside and outside. In the selection of shell materials, materials with high magnetic permeability are used to prevent magnetic saturation; the shielding treatment is done at the opening and gap positions to control the intrusion of external electromagnetic interference; the physical distance between electronic components and discharge circuits is increased to reduce electromagnetic radiation influence. 2. Transformer isolation is used. The main and auxiliary coils are physically isolated, and the induced electromotive force is generated according to the principle of magnetic flux change. The output can be controlled by using the number of turns ratio. 3. Hardware interface protection design is used. In order to avoid static electricity and instantaneous electrical surges in the system, interface protection devices can be added at necessary rear interface positions, including rectifiers, fuses, and filters such as TVS filter devices.

[0042] The energy module, the communication control module, the positioning module, the theft-proof module, the air bag, and the depth-keeping cable are embedded in the top of the shell structure; the sonar module is embedded in the lower part of the shell structure, and the horizontal sonar part can be folded and unfolded by 90 degrees after the vertical sonar part is controlled to stretch and retract, and the whole presents an umbrella shape; the video module is embedded in the bottom of the shell structure.

[0043] The air bag is a ring-shaped air bag that can be expanded horizontally, and the depth-keeping cable is connected to the shell structure and the vertical sonar part. The vertical sonar part is telescopic, and the horizontal sonar part is foldable.

[0044] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] The specific embodiments of the present application have been described above. It should be understood that the present application is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other without conflict.

Claims

1. A water-deployed umbrella-type relay sonar device, characterized by, The application relates to a water-borne relay sonar device. The device comprises a radio part, a sonar part and a shell structure. The shell structure contains the radio part and the sonar part. The radio part is located above the sonar part. The radio part and the sonar part are connected by a cable. The sonar part comprises a vertical sonar part and a horizontal sonar part. The vertical sonar part is suspended vertically on the sea surface after being launched into water. The vertical sonar part adopts a cylinder piezoelectric transducer for transmitting and receiving signals. The passive working frequency band of the vertical sonar part is 100Hz-20kHz. The active frequency is 2k-5k.

2. The water-launched umbrella-relay sonar device of claim 1, wherein, The emitted sound wave is in pulse wave form.

3. The water-launched umbrella-relay sonar apparatus of claim 1, wherein, The horizontal sonar part adopts a cross-shaped line array.

4. The water-launched umbrella-relay sonar apparatus of claim 1, wherein, The horizontal sonar part is parallel to the sea surface.

5. The water-launched umbrella-relay sonar apparatus of claim 4, wherein, The horizontal sonar part is a passive sonar.

6. The water-launched pop-up relay sonar apparatus of claim 1, wherein, The vertical sonar part is retractable.

7. The water-launched pop-up relay sonar apparatus of claim 1, wherein, The horizontal sonar part is foldable. The vertical sonar part and the horizontal sonar part jointly form an umbrella-shaped structure. The sonar signal is transmitted to the radio transmitter on the top of the radio part. The radio transmitter converts the sonar signal into a radio signal. The radio signal is emitted through a water surface antenna. The radio signal is demodulated by a radio receiver on the mother ship. The information processing is completed to realize the relay detection function. The mother ship sends relevant information through the radio part. The information is demodulated and converted to control the emission of the sonar part. The shell structure adopts a water-tight material resistant to electromagnetic interference. The shell structure contains a surrounding suspension air bag and a depth-keeping water-tight cable. When the shell structure is immersed in water, the air bag is inflated to open the shell structure. The sonar part is hung to a position under water through the depth-keeping cable. The air bag is a ring-shaped air bag which can be expanded horizontally. The depth-keeping cable is connected to the shell structure and the vertical sonar part. The water-borne relay sonar device is launched into water by a rocket on the mother ship. When the water-borne relay sonar device detects a preset immersion feature, the relay is turned on to automatically start power supply. The mother ship accesses and controls the communication control module of the radio part of the water-borne relay sonar device through a key. The sonar module is started to realize active and passive detection. The sonar part calculates the position and depth of the underwater target. The information is sent to the mother ship through the communication control module. The information is demodulated by the mother ship. The information is connected to the sonar system of the ship.

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