Kai-Hung Chang
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Kai-Hung Chang has a total of 3 co-authors. Here are the top co-authors by number of shared publications:
- Shao-Kang Hung
Department of Mechanical Engineering, National Yang Ming Chiao Tung University, Hsinchu, Taiwan
2 shared publications - Cheng-Lung Chen
Department of Mechanical Engineering, National Yang Ming Chiao Tung University, Hsinchu, Taiwan
1 shared publication - Yu-Hsin Chung
Department of Mechanical Engineering, National Yang Ming Chiao Tung University, No. 1001, University Road, Hsinchu 30010, Taiwan
1 shared publication
Latest Publications
- Open Access
Optoelectronic Angular Displacement Measurement Technology for 2-Dimensional Mirror Galvanometer
The mirror galvanometer is a crucial component of laser cutters/engravers. Novel two-dimensional mirror galvanometers demonstrate less trajectory distortion than traditional one-dimensional ones. This article proposes an optoelectronic sensor that measures a mirror’s inclinations in two dimensions simultaneously. The measuring range, resolution, and sampling rate are ±10°, 0.0265°, and 2 kHz, respectively. With the proposed sensor, a closed-loop control can be further implemented to achieve precision laser machining. Its compact size and low cost meet the requirements of miniature laser engravers, which have become popular in recent years.
Open AccessOptoelectronic Angular Displacement Measurement Technology for 2-Dimensional Mirror Galvanometer
The mirror galvanometer is a crucial component of laser cutters/engravers. Novel two-dimensional mirror galvanometers demonstrate less trajectory distortion than traditional one-dimensional ones. This article proposes an optoelectronic sensor that measures a mirror’s inclinations in two dimensions simultaneously. The measuring range, resolution, and sampling rate are ±10°, 0.0265°, and 2 kHz, respectively. With the proposed sensor, a closed-loop control can be further implemented to achieve precision laser machining. Its compact size and low cost meet the requirements of miniature laser engravers, which have become popular in recent years.
- Open Access
- 14 December 2021
- Published by MDPI AG in Applied Sciences
- Vol. 11 (24) , 11887
Design and Implementation of a Tether-Powered Hexacopter for Long Endurance Missions
A tether-powered unmanned aerial vehicle is presented in this article to demonstrate the highest altitude and the longest flight time among surveyed literature. The grid-powered ground station transmits high voltage electrical energy through a well-managed conductive tether to a 2-kg hexacopter hovering in the air. Designs, implementations, and theoretical models are discussed in this research work. Experimental results show that the proposed system can operate over 50 m for 4 h continuously. Compared with battery-powered multicopters, tether-powered ones have great advantages on specific-area long-endurance applications, such as precision agriculture, intelligent surveillance, and vehicle-deployed cellular sites.
- 14 December 2021
- Published by MDPI AG in Applied Sciences
- Vol. 11 (24) , 11887
Open AccessDesign and Implementation of a Tether-Powered Hexacopter for Long Endurance Missions
A tether-powered unmanned aerial vehicle is presented in this article to demonstrate the highest altitude and the longest flight time among surveyed literature. The grid-powered ground station transmits high voltage electrical energy through a well-managed conductive tether to a 2-kg hexacopter hovering in the air. Designs, implementations, and theoretical models are discussed in this research work. Experimental results show that the proposed system can operate over 50 m for 4 h continuously. Compared with battery-powered multicopters, tether-powered ones have great advantages on specific-area long-endurance applications, such as precision agriculture, intelligent surveillance, and vehicle-deployed cellular sites.