Abstract:

This research is about an integrated comfort sensing system on indoor climate using humidity, temperature and air flow sensors with integrated driving and amplifying circuit. The comfort sensing appears to be highly sensitive to temperature and air flow. We have designed and fabricated a one-bodied humidity/temperature sensor and a flow sensor. In order to drive sensors and amplify signals, the ASIC chip has been designed and integrated by CMOS technology. Because the first ASIC chip was not good for driving and amplifying signals, we designed and fabricated a different OP-AMP cell of the circuit. The microcontroller calculates a predicted mean vote (PMV) and comfort sensing vote (CSV) with sensing signals and displays a PMV on liquid crystal display (LCD) for human comfort on indoor climate. Our work has demonstrated that an integrated comfort sensing system can provide an effective means of measuring the indoor comfort sensing index of a human being. Experimental results with simulated environment clearly suggest that our sensing system can be used in many applications such as air conditioning system, feedback controlling in automobiles, homes, hospitals, etc.