A self-powered absolute shaft encoder based on triboelectric nanogenerator. (July 2022)

• Record Type: Journal Article
• Authors: Lee, Yongjoo; Kang, Seong Gu; Jeong, Jaehwa
• Is Part Of: Nano energy. Volume 98(2022)
• Publication Date: 2022-07
• Subjects: Triboelectric nanogenerator -- Self-powered -- Encoder -- Absolute angle -- Voltage pumping; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2022.107230
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: A rotary encoder is an important element for measuring the rotational motion in various mechanical systems. This paper proposes a self-powered absolute shaft encoder (SPASE) based on a triboelectric nanogenerator that enables absolute angle measurement and stable signal detection without additional circuits for signal processing by utilizing a voltage pumping method. SPASE was designed by separating the measurement function and the triboelectric power generation function and modularizing the parts that perform each function. A SPASE prototype with a size of ϕ 42 mm × 50 mm was manufactured. It was experimentally confirmed that, in this prototype, a voltage of 182.7 V can be generated in the pumping module and that stable angle measurement with a resolution of 12° can be successfully conducted over a wide speed range from 40 to 2000 rpm in the sensing module. Furthermore, SPASE exhibits great applicability and flexibility as a self-powered absolute angle sensor because the pumping and sensing modules are separated and each module can be independently operated as needed. SPASE is expected to be used in various fields that require rotation monitoring without any external power sources. Graphical abstract: Highlights: A self-powered absolute shaft encoder (SPASE) based on triboelectric nanogenerator was proposed. SPASE enables absolute angle measurement. Utilizing a voltage pumping method, robust sensing output was obtained over a wide speed range from 40 to 2000 rpm.