title: Note: High-efficiency broadband acoustic energy harvesting using Helmholtz resonator and dual piezoelectric cantilever beams.
abstract: A high-efficiency broadband acoustic energy harvester consisting of a compliant-top-plate Helmholtz resonator (HR) and dual piezoelectric cantilever beams is proposed. Due to the high mechanical quality factor of beams and the strong multimode coupling of HR cavity, top plate and beams, the high efficiency in a broad bandwidth is obtained. Experiment exhibits that the proposed harvester at 170-206 Hz has 28-188 times higher efficiency than the conventional harvester using a HR with a piezoelectric composite diaphragm. For input acoustic pressure of 2.0 Pa, the proposed harvester exhibits 0.137-1.43 mW output power corresponding to 0.035-0.36 μW cm(-3) volume power density at 170-206 Hz.
authors.affiliation: Research Center of Sensors and Instruments, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
authors.forename: Aichao
authors.initials: A
authors.lastname: Yang
authors.affiliation: Research Center of Sensors and Instruments, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
authors.forename: Ping
authors.initials: P
authors.lastname: Li
authors.affiliation: Research Center of Sensors and Instruments, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
authors.forename: Yumei
authors.initials: Y
authors.lastname: Wen
authors.affiliation: Research Center of Sensors and Instruments, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
authors.forename: Caijiang
authors.initials: C
authors.lastname: Lu
authors.affiliation: Research Center of Sensors and Instruments, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Peng
authors.affiliation: Research Center of Sensors and Instruments, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
authors.forename: Wei
authors.initials: W
authors.lastname: He
authors.affiliation: Research Center of Sensors and Instruments, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
authors.forename: Jitao
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Research Center of Sensors and Instruments, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
authors.forename: Decai
authors.initials: D
authors.lastname: Wang
authors.affiliation: Research Center of Sensors and Instruments, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Yang