Abstract
Constructing a ocean Internet of Things requires an essential ocean environ ment monitoring system. However, the widely distributed existing ocean monitoring sensors make it impractical to provide power and transmit mon itored information through cables. Therefore, ocean environment monitoring systems particularly need a continuous power supply and wireless transmis sion capability for monitoring information. Consequently, a high-strength, environmentally multi-compatible, floatable metamaterial energy harvesting device has been designed through integrated dynamic matching optimization of materials, structures, and signal transmission. The self-powered monitoring system breaks through the limitations of cables and batteries in the ultra-low frequency wave environment (1 to 2Hz), enabling real-time monitoring of various ocean parameters and wirelessly transmitting the data to the cloud for post-processing. Compared with solar and wind energy in the ocean envir onment, the energy harvesting device based on the defective state char acteristics of metamaterials achieves a high-energy density (99 W/m3). For the first time, astable powersupplyforthemonitoringsystemhasbeenrealizedin various weather conditions (24 h).