Environmental Sensory Microsystems


The Sensor Revolution carries the vision of analyzing and defining the environment by a ubiquitous deployment of smart, autonomous, cooperating, and inexpensive sensors, as exemplified by concepts such as Wireless Sensor Networks and Smart Dust. Beyond traditional measurement such as temperature and pressure, these sensors are capable of monitoring complex phenomenon, for example, water quality, gas toxicity, radiation level, and microbiological growth. Since environmental sensors measure an input that has many constituents with widely varying properties, it is challenging to design sensors that are accurate and robust against disturbance. For example, many sensors exhibit hysteresis and depend highly on ambient temperature, requiring frequent calibration. In addition, many designs lack energy efficiency and portability.


The goal of this project is to design, prototype, and characterize intelligent sensors that can function adaptively according to specific operating conditions. Our approach is to use electronics as a platform to provide the adaptive intelligence through mixed analog and digital feedback control. In addition, microsystems design methodology aims to fit the overall system into a volume in the order of one cubic inch.


The development of selective, miniaturized environmental sensing technologies enables the wide-spread deployment of autonomous sensors for the early detection of hazardous environmental conditions.


Areas of study: sensor design, adaptive control, environmental sensing

Supervisor: Dr. Derek HO (derekho@cityu.edu.hk; www.atomstosystems.com)

Suitable for: M.Phil./Ph.D.