Special Issue on Wireless and Passive Surface Acoustic Wave Sensor

Characterisation of a Wireless Passive Surface Acoustic Wave Strain Sensor

Wirelessly interrogated surface acoustic wave (SAW) sensors can operate passively and in harsh conditions reliably. The interrogation process of the signal measurement chain provides the power to excite the sensor and hence establish the sensors response in a passive manner. Development of wireless passive SAW sensors allows investigation of their potential to quantify physical measurands such ...

Passive Downhole Pressure Sensor Based on Surface Acoustic Wave Technology

A passive surface acoustic wave (SAW) pressure sensor was developed for real-time pressure monitoring in downhole application. The passive pressure sensor consists of a SAW resonator, which is attached to a circular metal diaphragm used as a pressure transducer. While the membrane deflects as a function of pressure applied, the frequency response changes due to the variation of the SAW propagat...

Implementation of On-Off Passive Wireless Surface Acoustic Wave Sensor Using Coding and Switching Techniques

Special issue on wireless multimedia sensor networks

With the availability of low-cost, small-scale imaging sensors, CMOS cameras, and microphones – all of which may ubiquitously capture multimedia content from the field – Wireless Multimedia Sensor Networks (WMSN) have been proposed and have received the immediate attention of the research community. WMSN applications, e.g., multimedia surveillance networks, target tracking, environmental monito...

Special Issue on Wireless Sensor Network: Theory and Practice

Wireless sensor network (WSN) is an emergent multi-disciplinary science, and it may be considered as the foundation of pervasive computing, mobile computing and wearable computing. WSN is a very active and competitive research area due to its diverse and unlimited potential applications: air, underground and underwater. In spite of its young age, economic impact of WSN is important, for example...