The Research And Design For Industrial Analyzer Of Coal Quality Based On ARM

The industrial analyzer for coal quality is used to measure the quality percent of water, ash, volatilization and solid state carbon in coal, as well as an important way to know the character of coal, as well as the base of evaluating coal.It is able to judge the coal's character, types, the effect of machining-using and the industry purpose by this analyzer, which has developed very quickly on both structure and autocontrol technique in our country since recent years. And now the analyzer has been widely used in industry field.However, with the increase of function demands, speed and precision, it will be an obvious tendency to adopt 32 bit embedded system in the analyzer, because of lacking of resource in testing an controlling system which based on 8 bit or 16 bit single chip processor.At first, the paper introduced the content and mening of the industrial analyzer for coal quality, expatiated the analyse method and the development of the analyzer both in our country and abroad now, as well as the limitation. Then according to the thermogravimetric analysis theory the paper designed a kind of fully auto-measuring industrial analyzer for coal quality based on ARM. The paper also detailedly introduced the hardware design, the software design and the PC system design. The author mainly made the research on the hardware controlling system based on ARM, which consist of simply introducing the LPC2214 MCU, adopting a new cold-junction compensation chip max6675 to improve the testing precision,designing a RS485 circuit which can auto receive and send message so that it can link PC and make network conveniently. The paper also designed a kind of control-circuit to adjusted voltage modul,and make the simulated wave form out.In order to improve the work efficiency and reduce the man-made error, the analyzer adopted the simple manipulator to automatically send and snatch at sample,which was realized in circuit by controlling step motor with CPLD. It not only enhances the systematic anti-interference ability but also can make the program keep secret.The analyzer's software is based on the embedded operating systemμC/OS-Ⅱ. The paper researched the transplant ofμC/OS-Ⅱon LPC2214.The idea of delaminated design realized the modularization and delamination of complex applications. With this method, the software exploiting was speeded up, and the dependability and maintainability of the software was guaranteed. The task in realizing the constant temperature has adopted the fuzzy control technique. The simulated experiment is indicated that this technique can meet well to heat in the tradition dry box which has stagnant, as well as can make the dry box temperature stabilize relatively speedily in the needed temperature.For building the unified laboratory analysis system handles platform for coal, the paper researched the communication procedure in the analysis system which adopted the standard M0dBus communication protocol. It is an important actual significance to laboratory instrument management and expansion. And the paper also has shown some pertinent operationinterface pictures.