An Electronic-Nose Sensor Node Based on a Polymer-Coated Surface Acoustic Wave Array for Wireless Sensor Network Applications

作者：Tang Kea Tiong^*; Li Cheng Han; Chiu Shih Wen

来源：Sensors, 2011, 11(5): 4609-4621.

DOI：10.3390/s110504609

• electronic nose
• wireless sensor network
• sensor node
• SAW sensor array

This study developed an electronic-nose sensor node based on a polymer-coated surface acoustic wave (SAW) sensor array. The sensor node comprised an SAW sensor array, a frequency readout circuit, and an Octopus II wireless module. The sensor array was fabricated on a large K-2 128 degrees YX LiNbO3 sensing substrate. On the surface of this substrate, an interdigital transducer (IDT) was produced with a Cr/Au film as its metallic structure. A mixed-mode frequency readout application specific integrated circuit (ASIC) was fabricated using a TSMC 0.18 mu m process. The ASIC output was connected to a wireless module to transmit sensor data to a base station for data storage and analysis. This sensor node is applicable for wireless sensor network (WSN) applications.

• 出版日期2011-5
• 单位清华大学