A portable testing system for CH4 volume fraction is introduced.With the sufficient demonstration of the test principle and methods
the infrared sensor for CH4 volume fraction detection is designed.The ARM hardware platform based on S3C44B0 is developed.It consists of A/D conversion module
LCD display module and serial port communication module.The infrared sensor designed is characterized by rapid respond speed and good adapting for adverse circumstance.With the ARM embedded processor
this system has advantages of good real-time performance
offline operation and portability.It can be extended to the dangerous gas detection in chemical industry