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Harmful Gas,Infrared Sensing and Voice Warning Control System Based on AVR Chip

SU Boxian,ZHU Ming (Changzhou Vocational College of Mechanical and Electrical Engineering,Changzhou 213164,China)  
The system hardware design and software realization are introduced which takes infrared sensing,voice warning system as platform,and uses AVR chip as key control element.The system makes use of infrared sensing system to sense whether there is harmful gas or not,in the vicinity sents out high level in a sustained period of time.When harmful gas is present.The chip starts voice warning chip by opening interruption.Then the harmful gas parameters extracted form the superordination machine which are serial-port communication and gives warning to the nearby person.Meanwhile the safety of the environment is made known by comparing with safe value.The entire system designed is very friendly,convenient and the information given to person is also very direct.
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