The Intelligent Analyzer Of CO₂ Concentration Design Based On Infrared Absorption

This paper mainly based on the principle of infrared absorption CO2 gas concentration detection system. IR absorption of the basic principle:different gases have different molecular structure, but each also has natural gas absorption spectrum, infrared light when the wavelength of light emitted gases to be detected with the same or similar absorption wavelength, the wavelength light through the gas to be detected strong absorption phenomenon occurs, and its absorption intensity and the concentration of the gas, into the chamber by detecting the light intensity before and after the detection of gases can.Paper first analyzes the design of infrared CO2 analyzer significance of concentration and detection of domestic CO2 concentration in the main method and Development. Then introduced based on the infrared absorption of CO2 concentration in the basic principles of instrument design and the basic structure of the sensor composition, analysis of the actual impact of the measurement process and the Elimination.And details of the system hardware and software design.The hardware circuit design using high-speed, low power microprocessor ATmega128 as the controlling core of the external circuit by extending the basic completion of the system measurements. Modular design in software program designed to enhance the readability and portability system.After repeated experiments and data analysis to prove the feasibility of the system design.The analyzer also has high accuracy, good stability, fast response, small size and other characteristics of high application value.