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Indoor air-conditioning system (IAS) using wireless sensor network serves to reduce the amount of pollutants entering the room from outside and also the pollutants that are generated indoor. Small-size, low power wireless sensor node and sensor interface board was designed for indoor air-conditioning system in buildings of offices and industrial establishments. Several sensor nodes form an ad-hoc network topology using simple forwarding routing protocol to transmit polluting gas concentration data from different rooms to the indoor air-conditioning system. Sensor node can be efficiently controlled by connecting to a PC for conserving the energy of sensor node using query processing. Sensor node analyzes pollution concentration in each room and air-conditioning system performs to air-distribution and air-inhalation according to room's pollution by regulating the fan of indoor air-conditioning system. To reduce power consumption, an electrochemical gas sensor is used in the design. Thus the designed system is able to optimize the state of indoor environment.
Date of Conference: 21-23 Nov. 2007