Development Of Unmanned Corrosive Substances Water Bath Test Device

Dangerous chemicals because of their inherent corrosion characteristicshave taken a potential threat or actual harm to public safety at various stages in thelife cycle of the production, transportation, operation, usage, treatment and so on.China’s trade in chemicals takes its place in the front ranks of the world, but thehazardous properties of chemical corrosion detection technology and equipmentdeveloped in its infancy, one of the few existing domestic testing equipment havefeatures as follow: simple, low degree of automation and accuracy, poor securit,international standards in line with the low, it is difficult to provide effective supportfor the efficient development of China’s chemical industry and the import and exportof chemicals to deal with technical barriers to trade.This paper based on the principle of simulation test in the partial test space,explored the corrosion influencing factors, applied software FLUENT to simulatewater bath circulation flow and heat transfer effects, focused on unmanned testtechnology, the uniformity of the liquid bath temperature field technology, precisiontemperature detection technology and software control, developed a testinginstrument which was urgently needed by the corrosive substance identificationgrading, and realized weak corrosive substances under precisely controlledtemperature, security and automatic detection. Specific research work are as follows:Firstly, in-depth research on the corrosive substances test device and constanttemperature water bath technology at home and abroad was made, the device wasasked the overall design scheme, which designed corrosion react experimentalplatform and analyzed the key factor to affect the accuracy of the temperaturemeaturement of the heater power and distribution locations and cabinet design,builded a reliable cross three-dimensional water cycle experiment platform, which isconducted the fluid simulation test, refined and improved the water cycle efficiency.Secondly, this paper introduces reaction detection. The hardware based onATmega128MCU as the core, mainly comprised main control module, temperature detection 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.Lastly, the system collected a large number of experimental data to analysis,which used to test the water bath device for temperature control precision andtemperature uniformity, according to the actual situation to improve device, finallysummarized the existing problems and put forward the prospect of device.Experimental results show that: the device temperature control precision isbetter than±0.1°C, temperature uniformity is better than±0.2°C,28daysunmanned test has stability, good reliability and high degree of automation, whichmeet actual demand.