This paper describes the development and the characterization of a wireless gas sensor network (WGSN)
for the detection of combustible or explosive gases. The WGSN consists of a sensor node, a relay node,
a network coordinator, and a wireless actuator. The sensor node attains early gas detection using an on
board 2D semiconductor sensor. Because the sensor consumes a substantial amount of power, which
negatively affects the node lifetime, we employ a pulse heating profile to achieve significant energy
savings. The relay node receives and forwards traffic from sensor nodes towards the network coordinator
and vice versa. When an emergency is detected, the network coordinator alarms an operator through the
GSM/GPRS or Ethernet network, and may autonomously control the source of gas emission through the
wireless actuator. Our experimental results demonstrate how to determine the optimal temperature of
the sensor’s sensitive layer for methane detection, show the response time of the sensor to various gases,
and evaluate the power consumption of the sensor node. The demonstrated WGSN could be used for a
wide range of gas monitoring applications.
This paper describes the development and the characterization of a wireless gas sensor network (WGSN)for the detection of combustible or explosive gases. The WGSN consists of a sensor node, a relay node,a network coordinator, and a wireless actuator. The sensor node attains early gas detection using an onboard 2D semiconductor sensor. Because the sensor consumes a substantial amount of power, whichnegatively affects the node lifetime, we employ a pulse heating profile to achieve significant energysavings. The relay node receives and forwards traffic from sensor nodes towards the network coordinatorand vice versa. When an emergency is detected, the network coordinator alarms an operator through theGSM/GPRS or Ethernet network, and may autonomously control the source of gas emission through thewireless actuator. Our experimental results demonstrate how to determine the optimal temperature ofthe sensor’s sensitive layer for methane detection, show the response time of the sensor to various gases,and evaluate the power consumption of the sensor node. The demonstrated WGSN could be used for awide range of gas monitoring applications.
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