Autogenous Ignition Temperature Tester Development Based On Fuzzy Adaptive Control

Dangerous chemicals pose potential threats to public safety or actual harmin production, transportation, distribution due to the inherent danger of spontaneouscombustion characteristics. Currently, the develop of spontaneous combustion hazardcharacteristics detection technology and equipment in our country is in its infancy.It`s hard to provide effective support for efficient development of China’s chemicalindustry and the import and export of chemicals to deal with technical barriers totrade.This paper explore the influencing factors of spontaneous combustion based onSemenov theory of spontaneous combustion heat, Focus on the constant temperatureoven occurred technology, high-precision temperature sensing technology andsoftware control, develop the solid material ignition point test instrumentation whichurgent needed, achieve automatic detection of spontaneous combustion. Asfollowing:Firstly, this paper base on comprehensive understanding of domestic ignitionpoint test method and temperature control technology status, give the overall design,design spontaneous combustion device, analysis of the key factors heater power andresistance furnace design affect the accuracy of the temperature measurement,Achieve automatic detection of spontaneous combustion of solid, propose fuzzy-PIDalgorithm constant temperature.Secondly, this paper introduces reaction detection. The hardware based onATmega128MCU as the core, mainly comprised main control module, temperaturedetection module, heating module, man-machine interaction module and watercirculating pump control module. This paper focused on the uncertainty in theprocess of temperature measurement and optimized the existing temperaturedetection circuit based on the ratio method, which improved the precision andtemperature detection stability. Software used the modular design method, includingtemperature control, human-computer interaction and data communication, in whichthe temperature control with integral term given initial law PID as the core. Finally, after a lot of analysis of experimental data validation, temperatureaccuracy reaches ignition point A test device-level accuracy, temperature deviationis less than10%; instrument repeatability test standard deviation of less than2%.And improve the device according to the actual situation and, finally, there is aproblem device and make prospects.