1. Feng Chia University, Department of Electrical Engineering, 100 Wenhwa Road, Seatwen, Taichung 40724, Taiwan
2. Feng Chia University, Department of Photonics, 100 Wenhwa Road, Seatwen, Taichung 40724, Taiwan
3. National Changua University of Education, Department of Mechatronics Engineering, No. 2, Shi-Da Road, Changhua City 50074, Taiwan
4. Feng Chia University, PhD Program of Electrical and Communications Engineering, 100 Wenhwa Road, Seatwen, Taichung 40724, Taiwan