Development of Dust Sampler Based Flow Closed-loop Control
WU Fu-xiang1,CHEN Jian-ge1,WANG Jing-yu2
1.Chongqing Research Institute of China Coal Technology & Engineering Group Corporation, Chongqing 400037, China
2.Chong Qing National Energy Mining Industry Evalluation Consultancy, Chongqing 400011, China
Abstract：Contrary to dust sampler based on open-loop flow control whose sample volume existed errors with the load changes, a closed-loop flow control gas sampler was proposed and studied. A closed loop control system was constituted, using a micro gas mass flow sensor, adjustable micro-pump and controller. Combined with incremental PID control algorithm with dead and method of point accumulated gas sampling, this will eliminate errors caused by changes in load. Finally, the experimental results show that the gas flow of sampler closed-loop control have good linearity and high precision.
2017, Vol. 38 
