The Design And Realization Of Embedded Linux-based Liquidus Temperature Detection Software

Now using electrolytic aluminum technology to produce aluminum needs to consume a large number of electric energy, so, the higher aluminum electrolyte superheat, the more electric energy consumed. If liquidus temperature can be measured more accurately, the aluminum electrolyte superheat will be set scientifically for reducing energy consume.Detecting liquidus temperature artificially has a big error in judgment on superheat. Computer technology can be used to construct liquidus temperature detection system to realize data collection, and use which to draw step cooling curve, then analyze curve characters by algorithm to get liquidus temperature point more accurately for scientific basis of setting superheat. Liquidus temperature detection system is consisted of two parts of software and hardware, this article describe the construction design and functional implementation of software part of the system.The software part of the system is developed by Qt IDE in virtual machine installed with Linux system, and then downloaded in development board running embedded Linux system. The core functions of the software includes collection and storage of data from front end, drawing of step cooling curve, interference handling and the search of liquidus temperature.Be aimed at the interference in collection process, this article puts forward evaluation of filtering algorithm according to specific business needs, which possesses good effect. In regard to liquidus temperature detection, when temperature curve does not have inflexion or obvious inflexion, step cooling algorithm can not estimate liquidus temperature. Therefore, this article puts forward data destiny algorithm and processes comparative discussion to these two algorithms, which is applied in the liquidus temperature system software then. This article put forward windows manager frame, which is applied in the function extension and simplify status shift and parameter passing of software.The software system can collect temperature data from front end, and dectect liquidus temperature accurately as far as possible so that providing scientific basis for the setting of superheat.