智慧氣體偵測系統及其應用/Intelligent gas sensing system and its applications

  • 2020-05-22
  • 書報討論

Topic : 
智慧氣體偵測系統及其應用/Intelligent gas sensing system and its applications

Speaker :  
饒達仁 教授
國立清華大學 動力機械工程系/奈米工程與微系統所 


Date & Location : 2020/05/28 (Thu) 3:30 pm - 4:30 pm
Engineering 5 Building B1 International Conference Hall , Classroom 106,205,210 (工程五館 B1 國際會議廳, 教室106,205,210)


Abstract:  
Olfaction is one of the main human senses. In nowadays,
olfaction is not only important to individual but also to the
group or the industry. Applications of artificial olfaction (e.g.
electronic nose) have drawn more and more attentions,
including indoor/outdoor air quality control, factory safety,
food quality control, hazardous gas detection, environmental
quality control, medical diagnosis, and military application, etc.
Recent technological advances allow gases to be detected in
various ways; because of its low-cost and room-temperature
operation, the polymer type of chemical sensors, both CMOS
based resistive type and surface acoustic wave (SAW) type, are
feasible options in handheld devices. By learning from human
olfactory system, the bio-mimic electronic-nose system can be
built from gas sensing array, sensing circuits, data calculation
(algorithm), and aroma recognition. In contrast to metal oxide
sensors, the polymer type of chemical sensors can be operated
at room temperature and efficiently conserves power; the
sensitivity, linearity, rapid response time, and ease of
production of this technology facilitates its application. The
sensor interface circuit could be simple and small, although
sensitivity to humidity is a drawback of the conductive polymer
chemical sensor, which can be overcome by the circuit design.
In addition to sensing chip and circuit design, the algorithms
used to recognize and categorize the gas type and
concentration would be very important for the developed
detection system, especially in IOT (internet of things)
applications.