Ultrasonic communication through metallic barriers for non-destructive testing of hazardous industrial spaces**

从封闭在金属结构中的传感器收集数据是一项具有挑战性的任务，在许多工业应用中都是非常理想的，包括状态监测和无线传感。传统的通信方案不能建立安全通信，以便向和从密封的金属容器或通过厚金属层与操作员(读取器)隔离的传感器传输数据。如果需要通过金属栅栏将电力传输到数据生成单元(传感器)，这一挑战将进一步加剧。这项研究旨在为机器人无人机开发一种强大的技术，以实现对传感器(例如，气体、液位、表面等)的连续监控。在危险的封闭环境中。具体地说，该项目的目标是设计、开发和评估一种坚固的基于压电的系统，以通过金属栅栏传输低到中等数据速率的信号。**

Collecting data from a sensor enclosed in a metallic structure while being a challenging task, is greatly desirable in many industrial applications including condition monitoring and wireless sensing. Conventional communication schemes fail to establish a secure communication in order to transmit data to and from sensors that are enclosed in sealed metallic containers or those that are isolated from the operator (reader) through a thick metal layer. The challenge is further exacerbated if power needs to be transmitted to data generation unit (sensor) through the metallic barrier. This research aims at developing a robust technology for a robotic drone to enable continuous monitoring of sensors (e.g., gas, fluid level, surface, etc.) in hazardous enclosed environments. Specifically, the objective of this project is to design, develop and evaluate a robust piezo-based system to transfer low-to-medium data rate signals through metal barriers.**