Low-loss gas sensor for sensor network consisting of SAW resonators with large spaces between IDTs and reflectors

2012 ◽  
Author(s):  
M. Hikita ◽  
J. Hosaka
Keyword(s):  
Sensor Network ◽  
Gas Sensor ◽  
Low Loss ◽  
Saw Resonators

Investigation of Novel Surface Acoustic Wave (SAW) Gas Sensor Used in Sensor Network

PIERS Online ◽  
2008 ◽  
Vol 4 (3) ◽  
pp. 346-350
Author(s):  
Mitsutaka Hikita ◽  
Keiya Minami ◽  
Koki Takimoto ◽  
Yasushi Hiraizumi
Keyword(s):  
Acoustic Wave ◽  
Sensor Network ◽  
Gas Sensor ◽  
Surface Acoustic Wave

Experimental demonstration of a fiber-optic gas sensor network addressed by FMCW

2000 ◽  
Vol 12 (11) ◽  
pp. 1546-1548 ◽  
Author(s):  
H.L. Ho ◽  
W. Jin ◽  
H.B. Yu ◽  
K.C. Chan ◽  
C.C. Chan ◽  
...  
Keyword(s):  
Sensor Network ◽  
Gas Sensor ◽  
Fiber Optic ◽  
Experimental Demonstration

L and S band low-loss filters using SAW resonators

1994 ◽  
Author(s):  
Matsuda ◽  
Uchishiba ◽  
Ikata ◽  
Nishihara ◽  
Satoh
Keyword(s):  
Low Loss ◽  
Saw Resonators

A low-loss bandpass filter using SAW resonators

1993 ◽  
Vol 76 (10) ◽  
pp. 52-61
Author(s):  
Yoshio Satoh ◽  
Osamu Ikata ◽  
Tsutom Miyashita ◽  
Takashi Matsuda ◽  
Tokihiro Nishihara
Keyword(s):  
Bandpass Filter ◽  
Low Loss ◽  
Saw Resonators

scholarly journals A Wireless Gas Sensor Network to Monitor Indoor Environmental Quality in Schools

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4345 ◽  
Author(s):  
Alvaro Ortiz Perez ◽  
Benedikt Bierer ◽  
Louisa Scholz ◽  
Jürgen Wöllenstein ◽  
Stefan Palzer
Keyword(s):  
Sensor Network ◽  
Gas Sensor ◽  
Environmental Quality ◽  
Energy Savings ◽  
Environmental Parameters ◽  
Well Being ◽  
Sensor Nodes ◽  
Indoor Environmental Quality ◽  
Monitoring And Control ◽  
And Control

Schools are amongst the most densely occupied indoor areas and at the same time children and young adults are the most vulnerable group with respect to adverse health effects as a result of poor environmental conditions. Health, performance and well-being of pupils crucially depend on indoor environmental quality (IEQ) of which air quality and thermal comfort are central pillars. This makes the monitoring and control of environmental parameters in classes important. At the same time most school buildings do neither feature automated, intelligent heating, ventilation, and air conditioning (HVAC) systems nor suitable IEQ monitoring systems. In this contribution, we therefore investigate the capabilities of a novel wireless gas sensor network to determine carbon dioxide concentrations, along with temperature and humidity. The use of a photoacoustic detector enables the construction of long-term stable, miniaturized, LED-based non-dispersive infrared absorption spectrometers without the use of a reference channel. The data of the sensor nodes is transmitted via a Z-Wave protocol to a central gateway, which in turn sends the data to a web-based platform for online analysis. The results show that it is difficult to maintain adequate IEQ levels in class rooms even when ventilating frequently and that individual monitoring and control of rooms is necessary to combine energy savings and good IEQ.

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