A multi-beam forward-looking sonar structure

Abstract

The utility model provides a kind of multi-beam forward-looking sonar structure.A kind of multi-beam forward-looking sonar structure includes: transmitting transducer, receiving transducer, hardware circuit and shell, transmitting transducer is fixedly assembled in the top left end of shell, receiving transducer is fixedly connected in shell left end, and hardware circuit is arranged in the inside of shell;The transmitting array of transmitting transducer is fan matrix structure, and the receiving array of receiving transducer is rectangular matrix structure, and transmitting transducer and receiving transducer can realize the mutual conversion of acoustic signal and electrical signal based on piezoelectric effect and transmit to hardware circuit;Hardware circuit is used to realize the transmission, reception, processing and information output of underwater target signal.The utility model provides a kind of multi-beam forward-looking sonar structure, which can realize wide coverage angle acoustic signal transmission by fan transmitting array, and can improve the receiving resolution of reflected signal by rectangular receiving array, so as to realize high-definition underwater target detection and imaging.

Description

Technical Field

[0001] This utility model relates to the field of sonar technology, and in particular to a multi-beam forward-looking sonar structure. Background Technology

[0002] Underwater vehicles are increasingly used in deep-water exploration, shipwreck salvage, and topographic mapping, and multibeam forward-looking sonar, as a key device to ensure their safe navigation and efficient operation, is in growing demand. Multibeam bathymetry, with its advantages of wide-angle transmission and multi-channel directional reception, can acquire high-density strip-pattern topographic data, breaking through the limitations of traditional single-beam systems, and has become an important technology in the field of marine surveying.

[0003] However, the transducer structure design of existing products mostly adopts a single array structure. If the focus is on wide coverage angle design, the diffusion angle of the transmitting array increases, which will cause the acoustic signal energy to be dispersed. The receiving array will find it difficult to accurately capture the echo details in different directions, resulting in a decrease in resolution. If high resolution is pursued, the directivity of the receiving array will be enhanced, which will limit its receiving range and reduce the coverage angle. This makes it difficult to achieve both wide coverage angle and high resolution, resulting in poor detection effect.

[0004] Therefore, it is necessary to provide a multi-beam forward-looking sonar structure to solve the above-mentioned technical problems. Utility Model Content

[0005] This invention provides a multi-beam forward-looking sonar structure that solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides a multi-beam forward-looking sonar structure, including: a transmitting transducer, a receiving transducer, hardware circuitry, and a housing. The transmitting transducer is fixedly mounted on the top left end of the housing, the receiving transducer is fixedly connected to the left end of the housing, and the hardware circuitry is located inside the housing. The transmitting transducer has a fan-shaped matrix structure for transmitting and a rectangular matrix structure for receiving. Both are made of piezoelectric ceramic material. The transmitting and receiving transducers can convert acoustic signals and electrical signals to each other based on the piezoelectric effect and transmit them to the hardware circuit to achieve high-resolution, wide-coverage underwater target detection and imaging. The hardware circuitry is used to transmit, receive, process, and output signals from underwater targets.

[0007] Preferably, the housing is divided into a front end and a rear end. The transmitting transducer is fixedly mounted on the top of the front end of the housing, and the receiving transducer is fixedly connected to the left side of the front end of the housing. A sealing ring 1 and a sealing ring 2 are provided between the front end and the rear end of the housing to achieve double sealing.

[0008] Preferably, the hardware circuit includes: a bracket and a circuit board. The bracket is fixedly connected inside the front end housing and the rear end housing. The bracket is provided with a rectangular array of support columns. The circuit board is provided with fixing screws that correspond one-to-one with the support columns. The circuit board is fixedly mounted on the bracket by the cooperation of the support columns and the fixing screws. The circuit board is equipped with a front end processor, a mid-level processor system processor, an image memory, a scan converter, a video processor and an audio processor.

[0009] Preferably, a signal connector male is mounted on the rear end of the housing, and a signal connector female is provided on the signal connector male, and the signal connector female and the signal connector male are connected and communicate via a plug-in method.

[0010] Preferably, a signal cable is fixedly connected to the other end of the signal connector for transmitting signals.

[0011] Preferably, a communication cable is electrically connected between the signal connector and the circuit board to enable signal transmission between the signal connector and the circuit board.

[0012] Compared with related technologies, the multi-beam forward-looking sonar structure provided by this utility model has the following beneficial effects: First, the transmitting transducer adopts a fan-shaped matrix structure, and the receiving transducer adopts a rectangular matrix structure. Both are based on the piezoelectric effect of piezoelectric ceramic materials to achieve efficient conversion of electrical energy and acoustic energy. It can achieve wide coverage angle acoustic signal transmission through the fan-shaped transmitting array, and improve the receiving resolution of reflected signals with the help of the rectangular receiving array, thereby achieving high-definition underwater target detection and imaging, effectively solving the problem that traditional sonar cannot balance coverage and detection accuracy.

[0013] Second, the shell is divided into a front end and a rear end, with sealing ring one and sealing ring two forming a double seal between them, which greatly improves the waterproof and pressure-resistant performance of the sonar and ensures its stable operation in complex underwater environments. At the same time, the hardware circuit is securely installed through the support columns on the bracket and the fixing screws, which reduces the impact of underwater vibration on the circuit and ensures the stability of signal processing. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the right-side structure of this utility model; Figure 3 This is a schematic diagram of the exploded structure of this utility model.

[0015] The following are the labels in the diagram: 1. Transmitting transducer; 2. Receiving transducer; 3. Front end of housing; 4. Sealing ring one; 5. Sealing ring two; 6. Rear end of housing; 7. Signal connector male; 8. Signal connector female; 9. Signal cable; 10. Bracket; 11. Circuit board; 12. Support column; 13. Communication connection cable; 14. Fixing screws. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Please refer to the following: Figures 1 to 3 A multi-beam forward-looking sonar structure includes: a transmitting transducer 1, a receiving transducer 2, hardware circuitry, a housing, a signal plug, and a communication cable 13. The transmitting transducer 1 and receiving transducer 2 are both located outside the housing, the hardware circuitry is located inside the housing, the signal plug is mounted on the housing, and a signal cable 9 is mounted on the signal plug. The transmitting transducer 1 converts electrical signals into acoustic energy based on the piezoelectric effect, emitting ultrasonic waves for underwater detection. The receiving transducer 2 converts the acoustic energy reflected from underwater targets into electrical signals. The hardware circuitry is responsible for a series of operations, including transmission control, reception processing, and information output, of the electrical signals transmitted from the receiving transducer 2. The housing provides protection for the internal hardware circuitry and other components. The signal plug and communication cable 13 are electrically connected to jointly complete signal transmission.

[0018] Transmitting transducer 1 and receiving transducer 2 are the core components of the sonar system. Based on the piezoelectric effect, they realize the mutual conversion between electrical energy and acoustic energy. During transmission, an electrical signal is applied to the piezoelectric material, causing it to vibrate mechanically, thereby radiating ultrasonic waves. During reception, ultrasonic waves act on the piezoelectric material to produce mechanical vibration, which is then converted into an electrical signal. Both are made of high-performance piezoelectric ceramics (PZT-4, PZT-8) because they have high transmission efficiency as transmitters and high sensitivity as receivers, as well as a wide operating bandwidth. The transmitting array of transmitting transducer 1 is designed as a fan-shaped matrix structure, which is conducive to achieving wide-angle transmission and thus expanding the detection range. The receiving array of receiving transducer 2 is designed as a rectangular matrix structure, which facilitates multi-channel directional reception and improves the detection accuracy and resolution of underwater targets, so as to achieve high-resolution, wide-coverage angle underwater target detection and imaging functions.

[0019] The hardware circuit includes a bracket 10 and a circuit board 11. The bracket 10 is fixedly connected to the interior of the front housing and the rear housing. The bracket 10 is provided with a rectangular array of support columns 12. The circuit board 11 is provided with fixing screws 14 corresponding to the support columns 12. The circuit board 11 is fixedly mounted on the bracket 10 through the cooperation of the support columns 12 and the fixing screws 14. The circuit board 11 is equipped with a front-end processor, a mid-level processor system processor, an image memory, a scan converter, a video processor and an audio processor.

[0020] The front-end processor includes a receiving array, a transmitting array, and a beamformer. The transmitting array transmits a detection pulse signal through a transmitting transducer 1, and the receiving array receives the signal reflected back from the target through a receiving transducer 2. The signal is then sent to the beamformer to execute a beamforming algorithm to obtain imaging data.

[0021] The intermediate processor is used to receive imaging data and perform subsequent related signal processing, such as Doppler processing, amplitude detection, filtering, and target detection. Under the direct control of the system processor, it forms a tightly coupled system with the beamformer.

[0022] System processor: Provides an interface for interaction between the system and the user, and can load operational control parameters such as imaging depth, gain control level, and display mode into the system in real time.

[0023] The image memory is used to cache the output data of the intermediate processor; the scan converter converts the data relative to the beam space into data relative to the Cartesian coordinate space; the video processor and audio processor provide the acquired information to the user. The processors in the system are connected by a VME bus structure and communicate with each other through the VME backplane bus to meet the requirements of high-speed bus interface and high-speed communication protocol.

[0024] The housing includes a front end 3 and a rear end 6, which are made of aluminum alloy or titanium alloy. A sealing ring 4 and a sealing ring 5 are provided between the front end 3 and the rear end 6 to achieve positioning and sealing effects.

[0025] The signal connector includes: a male signal connector 7, a female signal connector 8, and a signal cable 9. The male signal connector 7 is mounted on the rear end 6 of the housing. The female signal connector 8 communicates with the male signal connector 7 by plugging and unplugging. The signal cable 9 is connected to the female signal connector 8 by hot-sulfurization.

[0026] The communication connection cable 13 is used to realize the signal transmission between the signal connector 7 and the circuit board 11, ensuring the signal transmission between the hardware circuit and the signal connector, and providing a guarantee for the signal processing and transmission of the entire sonar system.

[0027] The working principle of the multi-beam forward-looking sonar structure provided by this utility model is as follows: Under the control of the front-end processor, the transmitting array in the hardware circuit transmits electrical signals to the transmitting transducer 1. The transmitting transducer 1 converts electrical signals into acoustic energy based on the piezoelectric effect of piezoelectric ceramic materials. Its fan-shaped matrix structure of the transmitting array can emit ultrasonic waves with a wide coverage angle, realizing the detection of a large underwater area. When ultrasonic waves encounter an underwater target, they are reflected. The rectangular matrix structure of receiving transducer 2 receives these reflected acoustic signals. Also based on the piezoelectric effect, receiving transducer 2 converts the acoustic signals into electrical signals and transmits them to the hardware circuit. The rectangular receiving array helps to improve the receiving resolution of reflected signals, enabling more accurate capture of target information. After the receiving array in the front-end processor receives the reflected signal and converts it into an electrical signal, it is sent to the beamformer to execute the beamforming algorithm and obtain imaging data. The imaging data is transmitted to the intermediate processor. Under the control of the system processor, the intermediate processor performs subsequent signal processing such as Doppler processing, amplitude detection, filtering, and target detection on the data. The system processor provides an interactive interface between the system and the user. The user can set parameters such as imaging depth, gain control level, and display mode. These parameters are loaded into the system in real time and affect the signal processing process. The image memory buffers the data output by the intermediate processor. The scan converter converts the data in the beam space into data in the Cartesian coordinate space for better imaging and display.

[0028] The video processor and audio processor provide the processed information to the user to achieve information output. At the same time, the signal is transmitted to the signal docking male 7 through the communication connection cable 13, and then transmitted to the signal cable 9 through the signal docking female 8 that is plugged in and plugged in. The signal cable 9 completes the external transmission of the signal, thereby realizing the underwater target detection and imaging function with high resolution and wide coverage angle.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A multi-beam forward-looking sonar structure, characterized in that, include: Transmitting transducer (1), receiving transducer (2), hardware circuit and housing, the transmitting transducer (1) is fixedly assembled on the top left end of the housing, the receiving transducer (2) is fixedly connected to the left end of the housing, and the hardware circuit is set inside the housing. The transmitting array of the transmitting transducer (1) is a fan-shaped matrix structure, and the receiving array of the receiving transducer (2) is a rectangular matrix structure. Both are made of piezoelectric ceramic material. The transmitting transducer (1) and the receiving transducer (2) can realize the mutual conversion of acoustic signals and electrical signals based on the piezoelectric effect and transmit them to the hardware circuit, so as to realize high-resolution, wide-coverage angle underwater target detection and imaging. The hardware circuitry is used to transmit, receive, process, and output signals from underwater targets.

2. The multi-beam forward-looking sonar structure according to claim 1, characterized in that, The housing is divided into a front end (3) and a rear end (6). The transmitting transducer (1) is fixedly mounted on the top of the front end (3), and the receiving transducer (2) is fixedly connected to the left side of the front end (3). A sealing ring 1 (4) and a sealing ring 2 (5) are provided between the front end (3) and the rear end (6) to achieve double sealing.

3. The multi-beam forward-looking sonar structure according to claim 2, characterized in that, The hardware circuit includes a bracket (10) and a circuit board (11). The bracket (10) is fixedly connected to the interior of the front end housing and the rear end housing. The bracket (10) is provided with a rectangular array of support columns (12). The circuit board (11) is provided with fixing screws (14) corresponding to the support columns (12). The circuit board (11) is fixedly installed on the bracket (10) through the cooperation of the support columns (12) and the fixing screws (14). The circuit board (11) is equipped with a front end processor, a mid-level processor system processor, an image memory, a scan converter, a video processor and an audio processor.

4. The multi-beam forward-looking sonar structure according to claim 2, characterized in that, The rear end (6) of the housing is equipped with a signal connector male (7), and a signal connector female (8) is provided on the signal connector male (7). The signal connector female (8) and the signal connector male (7) are connected and communicated by plugging and unplugging.

5. A multi-beam forward-looking sonar structure according to claim 4, characterized in that, The other end of the signal connector (8) is fixedly connected to a signal cable (9) for transmitting signals.

6. A multi-beam forward-looking sonar structure according to claim 4, characterized in that, The signal connector (7) and the circuit board (11) are electrically connected by a communication cable (13) to realize signal transmission between the signal connector (7) and the circuit board (11).

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