Abstract:With china's rapid economic development and improving productivity, electric power, obtained as the economic power, has developed rapidly. Power plant plays a huge role in the development undoubtedly, China's power plants are increasing rapidly, and among them the thermal power plant occupies the biggest share. Thermal power plant is the major soot source, so as the focus of the soot pollution management. The dust in the atmosphere not only pollutes the atmosphere, but also brings inconvenience to the surrounding residents such as do great harm to their health, therefore, the management of thermal power plant admits of no delay .
This paper introduces a kind of waste gas sensor detecting system based on single chip microcomputer, this system drives the waste gas sensors to get continuous online real-time monitoring, analysis, forecast on the waste gas through single chip microcomputer for fear of the atmospheric pollution caused by the high concentration of waste gas and other reasons. Objective and timely reflect on the emissions of the thermal power plant would be made after disposing and analyzing, so as to ensure the purpose of environmental producing.
In addition, the system consists of a PC and an AT89C51 single chip. The design adopts the high performance microprocessor-STC12C5A60S2 compatible with 8051, as the controller, with the waste gas sensor installed in the chimney ,so as to detect the emissions of harmful gas concentration of the thermal power plant, and then the data collected from the sensors will be enlarged through the preamplifier, which would send to the ADC for A /D conversion.
Keywords：AT89C51；A /D conversion；Waste gas；senser