Research On Automatic Location And Control System Of Coal Sampling Machine In Thermal Power Plant

The process of taking a representative portion of coal from a large amount of coal is called sampling.The basic requirement of sampling is that all particles sampled by the batch may be entered into the sampling equipment,and each particle has equal probability of being sampled into the sample,so the randomness of the full sampling is very important.Coal sampling in thermal power plant includes coal sample,coal sample,pulverized coal sample,coal combustion products,fly ash and so on.Coal and coal quality detection in power plant mainly provides the basis for commercial settlement.This paper mainly discusses the automatic positioning control of the incoming coal sampling for commercial settlement.Based on the in-depth study of domestic and foreign automobile coal sampling machine advanced technology and application of the status quo,designed a set to meet the market demand of vehicle automatic coal sampling equipment and control system,and on-line operation in power plant.Datang Power Generation Group in 2014 put forward the requirements of building fuel platform,and organized the tender,the company won the bid.Take this opportunity to subordinate to coal structure,coal characteristics,user requirements,sampling standard,Datang Group acquisition management in-depth research,put forward the automatic generation of sampling scheme,solved by the whole automatic sampling machine implementation scheme.Secondly,aiming at the power plant sampling machine status,put forward the design scheme of sampling machine,to realize automatic positioning by using the distance encoder and infrared grating combined operation mode,and in order to ensure the coal sampling machine to batch acquisition,acquisition,license plate extraction,bucket advanced division,sample collection and emergency management of each link link,put forward the requirements of sampling head,splitter,injector,PLC and other hardware construction,and presented the corresponding hardware design and software design of control scheme.Through the implementation of the design scheme,fully automatic sampling machine and some functions such as automatic lacing avoidance,car front and the car can not distance to be developed and researched the encoder based on location,as the next research direction,on the imperfect function research.