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E-mail
18752476625@163.com
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Phone
18751941608
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Address
Room 1304, Building A1, No. 216 Pu Liu North Road, Getang Street, Jiangbei New District, Nanjing City
Nanjing Haohai Marine Technology Co., Ltd
Sharing the standardized operation process of M1200d multi beam forward-looking sonar
Date: 2025-09-15Read: 11
In underwater exploration, ocean mapping, unmanned underwater vehicle (ROV/AUV) navigation, and sunken ship search and rescue, the M1200d multi beam front sight sonar breaks through the visual limitations of dark and turbid waters with its wide coverage and high-resolution imaging capabilities, providing key perception for underwater target recognition and path planning. Its performance depends not only on hardware, but also on scientific and standardized operating procedures. Mastering rigorous usage methods is the key to ensuring efficient operation of M1200d multi beam forward-looking sonar.
Step 1: System inspection and installation positioning
Before use, check if the host, transducer array, cables, and power connections are intact and undamaged. Securely install the transducer under the hull keel or at the front end of the submersible, ensuring that the acoustic window is facing forward and unobstructed. The installation location should be away from propellers, bubble zones, and vibration sources to avoid sound wave interference. The waterproof joint needs to be coated with special grease and locked to prevent leakage.
Step 2: Parameter initialization and calibration
After booting up, enter the system software interface and set the basic parameters:
Working frequency: Low frequency (300kHz) is used for long-distance detection (>500m), and high frequency (900kHz) is used for high-resolution close-up imaging;
Range: Set according to task requirements (such as 100m, 300m);
Beam angle: Adjust the horizontal/vertical opening angle (such as 120 °× 20 °) to balance coverage width and resolution.
Perform attitude sensor (IMU) calibration to ensure accurate pitch and roll data and ensure geometric accuracy of the image.
Step 3: Navigation Mode and Data Collection
Keep the carrier sailing at a constant speed in a straight line, with a speed controlled at 2-6 knots, and avoid sharp turns. Start real-time scanning and observe the sonar image refresh rate and signal-to-noise ratio. When a suspected target is detected, it can be switched to "parking mode" for 360 ° fan scanning to obtain information. Record GPS location, timestamp, and sonar data stream to ensure traceability.
Step 4: Image Interpretation and Object Recognition
Operators need to be familiar with typical echo characteristics:
Hard targets (such as sunken ships and rocks) exhibit high brightness and strong reflection;
Soft substrate (sediment) appears as a uniform dark area;
Hollow structures (such as cabins) may experience multiple reflections.
Combine the shadow area to determine the height and contour of the target, avoiding misjudging the fish swarm as a fixed obstacle.
Step 5: Data Preservation and Equipment Maintenance
After the task is completed, export the raw data (in formats such as. s7k) to an encrypted hard drive for easier post-processing and modeling. Turn off the system power and clean the surface attachments of the transducer (such as algae and shells). Check for cable wear and store in a cool and dry place. Regularly send for inspection and calibration to ensure the synchronization accuracy between the sound velocity profile and time.