Automated Measurement of Underwater Acoustic Intensity in Three-Dimensional Space

Ultrasonic field characterization plays a crucial role in various scientific and industrial applications, including acoustic manipulation, biomedical engineering, and material processing. However, conventional ultrasonic measurement platforms suffer from low positioning accuracy, complex manual operation, and poor repeatability, limiting their effectiveness for high-resolution acoustic field mapping. In this work, a fully automated ultrasonic acoustic intensity acquisition system is developed to address these challenges. The system integrates a computer-controlled three-axis translation stage, real-time signal acquisition modules, and adaptive scanning algorithms to enable precise probe positioning, flexible scanning path definition, and synchronized data collection. A dedicated host computer interface allows users to easily configure scanning parameters, establish communication with hardware components, and monitor real-time measurement status. The system performance is validated through two sets of experiments under predefined acoustic field conditions. The experimental results demonstrate that the system can accurately capture both focused and complex random acoustic fields, with good consistency to the expected distributions, thereby confirming its feasibility, accuracy, and adaptability. The proposed system offers a reliable and efficient solution for advanced ultrasonic measurement and acoustic field analysis.