Energy Harvesting Transducer by Collecting Electromagnetic Energy Based on Ultrasonic Horn
This paper presents a new energy harvesting sensor by collecting electromagnetic energy based on SAW ultrasonic horn. A unidirectional transducer group and an inhomogeneous piezoelectric structure are created inside the transducer while propagating the unidirectionality required for low loss and receiving the convergent acoustic wave with higher power output. Because of using the ultrasonic horn structure, the acoustic waves may be converged by modifying the angle of the slope boundary and the wavelength of the incident wave. Almost all energy in a wave period is converged and gathered in a flash. Therefore the peak power output in receiving IDT may be much larger than that in input UDT. The electromagnetic energy collected from antenna can be gathered and accumulated ceaselessly, then burst in short time, thus the sensor can be deployed in longer distance than that of ordinary passive SAW sensors.
Energy Harvesting Self-powered Electromagnetic Energy SAW Ultrasonic Horn
Ping LI Yumei WEN
College of Opto-electronic Engineering,The Key Laboratory for Optoelectric Technology & Systems, Ministry of Education, Chongqing University Chongqing 400030, China
国际会议
2006 IEEE International Conference on Information Acquisition
山东威海
英文
550-555
2006-08-20（万方平台首次上网日期，不代表论文的发表时间）