20250220 Bridge Pier Sonar Inspection

The multi-beamimaging sonerhas a rated pressure-resistant water depith of 300m,with mutple operating frequencies avcilble and on fective detection range of 70m. tsupports equal -angle and equal dlitance beam modles and its 512 beams can handle most detection tasks. The target of this sonertest was the opposte bridge pier. The multi -beam sonar covers a wide water area and captures high-resolution underwater images.

This table showcases a series of underwater sonar products , categorized by their core functions as follows:

1. Forward-Looking Multi-Beam Imaging Sonars

These sonars are designed for forward-looking underwater imaging detection, with various frequency and performance configurations to meet different operational needs:

•FD-F700L: A single-frequency 2D forward-looking multi-beam imaging sonar. It offers selectable frequencies (700/900 kHz/1.2 MHz, default at 1.2 MHz), a 1.5° central beamwidth, a maximum detection range of 50m, a 100° horizontal field of view, and a maximum operating depth of 100m, ideal for basic underwater observation tasks.

•FD-F750EL / FD-F750M: Dual-frequency 2D forward-looking multi-beam imaging sonars. They support multiple selectable frequency points (375 kHz~2.1 MHz), with a 0.6° central beamwidth at 1.2 MHz, a maximum detection range of 200m (at 375 kHz), a 140° horizontal field of view, and optional depth ratings (300m/1500m), tailored for different installation scenarios.

2. Mechanical Scanning Sonars

These products use mechanical scanning technology to achieve imaging, balancing speed, portability, and performance:

•FD-MS360: A dual-beam mechanical scanning sonar. With a compact, low-power design, it operates at a default frequency of 1.2 MHz, offering a scanning speed of 2 frames per second (twice as fast as comparable products), a 50m maximum detection range, and a 300m maximum operating depth.

•FD-3D1000: A mechanical scanning 3D sonar. It features software-switchable frequencies (750 kHz/1 MHz), a 1°beamwidth, a 50m maximum detection range, and a scanning range of 360° horizontally and -15°to 90°vertically, enabling 3D underwater environment modeling.

3. Side-Scan Sonar

•FD-SS900: A side-scan sonar with selectable frequencies (900/450 kHz, default at 900 kHz), an integrated design, a 75m maximum detection range, and a narrow 0.3°horizontal beamwidth, suitable for underwater terrain mapping and target detection.

4. Multi-Beam Panoramic Sonar

•FD-MB360: A multi-beam panoramic sonar with dual frequencies (1.2/1.8 MHz). It offers a 50m detection range at 1.2 MHz (20m at 1.8 MHz), a horizontal beamwidth of 1.5°/1°, a 50Hz refresh rate, and a 300m maximum operating depth, enabling fast 360° underwater panoramic imaging.

In summary, these sonars cover a wide range of applications, including forward-looking imaging, side-scan mapping, 3D modeling, and panoramic detection, with diverse options for operating depth, frequency, and detection range to support underwater exploration, engineering surveys, and safety inspections.