Paul C.-P. Chao

Paul C.-P. Chao

Distinguished Professor,Dept. of Electrical Engineering

“Batteryless IoT Sensors”


The internet of things (IoT) has recently drawn much attention from industrial and academic societies, since many believe the related technologies could revolutionize the current faces of mobile devices, communication, biotech and healthcare, etc. These IoT technologies in fact relies on new sensors, fast networking, smart big data analysis and massive cloud storage. For example, towards long-time monitoring of bio-signals at home, the sensors with wearability in small-form factors, light weights, low-power and wireless transmissibility are required to work with a personal cloud to store long-time bio-data and perform big-data analysis, then would be able to conduct preliminary diagnosis and issue early warning. For wearable and low-power sensors, a technology platform of batteryless IoT sensors developed by Sensors IC Lab at NCTU, Taiwan is presented in this talk. The technologies in this platform include (1) high-efficiency PV panels to harvest indoor light; (2) a high-efficiency charge pump circuit with maximum point tracking (MPPT); (3) a low-power visible light communication (VLC) circuit; (4) a batteryless IoT tag; (5) a strain-type blood pressure (BP) sensor; (6) an optical sensor for blood flow and BP; (7) a gas sensor; (8) big-data analysis for sensor calibration and accuracy. In short, the platform aims to serve as the model to develop key technologies of batteryless IoT sensors that would lead to a new phase of IoT sensors.


Dr. Chao received Ph.D. from Michigan State University, USA, and then work for the Chrysler Corp in Au-burn Hill, Detroit, USA. He is currently a University Distinguished Professor at National Chiao Tung University (NCTU) and a faculty member of the electrical engineering department. Prof. Chao was the recipient of the 1999 Arch T. Colwell Merit Best Paper Award from Society of Automotive Engineering, Detroit, USA; the 2004 Long-Wen Tsai Best Paper Award from National Society of Machine Theory and Mechanism, Taiwan; the 2005 Best Paper Award from National Society of Engineers, Taiwan; the 2002/2003/2004 CYCU Innovative Research Award; the 2006 Outstanding AUO Award; 2007 the Acer Long-Term 2nd-prize Innovative Award; The 2007-2015 NCTU EEC Outstanding Research Awards; the 2009 Best Paper Award from the Symposium on Nano-Device Technology; the 2010, 2012-2015 Best Paper Awards from the 20th Annual ASME Conference on Information Storage and Processing Systems (ISPS); and the Best Poster Paper award of IDMC 2015. He was the University Associate Provosts of NCTU in 2010 and 2015. He served as the Secretary, IEEE Taipei Section, 2009-2010, and the founding chair of local chapter for the IEEE Sensor Council. Dr. Chao received two IEEE awards for this service: The IEEE Large Section Award from IEEE Head Quarter for the outstanding service as the Secretary for 2009-2010, and The IEEE MGA Award from IEEE Region 10 for outstanding service as the Secretary for IEEE Taipei Section, 2009-2010. He is the General Chair of the 2016 ASME ISPS and IoT conference in Santa Clara University, CA, USA. In recent years, his research interests focus now on sensors and actuators; integrated circuit design and mechatronics.