A SAW-based liquid sensor with identification for wireless applications

The development of a shear horizontal surface acoustic wave (SH-SAW) liquid sensor with identification (ID) for wireless applications is described. Moreover, a novel feature of "write capability" for this sensor is proposed. The SH-SAW passive sensor has a delay line configuration with a s...

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Main Authors: Hassani, F, Ahmadi, S, Korman, C, Zaghloul, M
Format: Conference Proceeding
Language:English
Subjects:
Acoustic sensors
Acoustic waves
Attenuation
Delay effects
Delay lines
IDT
liquid sensor
LiTa03
Lithium compounds
passive sensor
Reflection
Sensor phenomena and characterization
SH-SAW
Surface acoustic waves
wireless sensor
Wireless sensor networks
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creator Hassani, F
Ahmadi, S
Korman, C
Zaghloul, M
description The development of a shear horizontal surface acoustic wave (SH-SAW) liquid sensor with identification (ID) for wireless applications is described. Moreover, a novel feature of "write capability" for this sensor is proposed. The SH-SAW passive sensor has a delay line configuration with a sensing area. The sensor is fabricated on a lithium tantalate (LiTaO3) substrate, which is Y-cut with rotations specified between about 36° around the X-axis. The principle of detection is based on the attenuation and time delay between the signals. The sensor is encoded according to partial reflections of an interrogation signal by metal reflectors placed on both side of the interdigital transducers (IDT). The structure of the sensor, the principle of the wireless communication, the detection process and testing results are presented.
doi_str_mv 10.1109/ISCAS.2010.5537163
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subjects Acoustic sensors
Acoustic waves
Attenuation
Delay effects
Delay lines
IDT
liquid sensor
LiTa03
Lithium compounds
passive sensor
Reflection
Sensor phenomena and characterization
SH-SAW
Surface acoustic waves
wireless sensor
Wireless sensor networks
title A SAW-based liquid sensor with identification for wireless applications
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