A method and system for in-situ calibration of a shipboard intermediate-depth multi-beam bathymetric system
By deploying standard instruments and implementing synchronous measurements in a marine environment, and calculating multi-parameter errors, the calibration problem of shipborne mid-deep water multibeam echo sounding systems was solved, achieving efficient and reliable calibration results. This system is suitable for mid-deep water operations and can be extended to deeper waters.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TIANJIN RES INST FOR WATER TRANSPORT ENG M O T
- Filing Date
- 2026-05-22
- Publication Date
- 2026-07-17
AI Technical Summary
In the existing technology, shipborne mid-deep water multibeam echo sounders lack a unified and reproducible calibration method in real marine environments, resulting in large differences between laboratory indicators and actual offshore operation accuracy, making it difficult to conduct reliable evaluation and comparison, and affecting the accuracy and consistency of echo sounding data.
This paper provides an in-situ calibration method for a shipborne mid-deep water multibeam echo sounder system. By deploying a single-beam echo sounder and a bottom-mounted standard hydrophone in a selected sea area, planning the calibration survey line, implementing synchronous measurements, calculating the water depth indication error, transmitted beamwidth error, coverage angle error, and transmitted sound source level error, and using an ultra-short baseline underwater acoustic locator and a global navigation satellite system for precise measurements.
It enables the calibration of the entire multibeam echo sounder system in a real marine environment, improving the repeatability and stability of the calibration. The measurements are traceable, and the errors of various parameters are within the design tolerance range. It is suitable for medium and deep water operations and can be extended to deeper waters.
Smart Images
Figure CN122410490A_ABST