【摘要】 <正> 一、前言在流态化技术的领域内,物料的粒度和粒度分布对流化质量的影响,一直是很多研究工作者密切注意的问题。郭慕孙提出了应用床层塌落法判别流态化特性的概念,董元吉经过实验研究了床层塌落的全部过程,杨子平在此基础上进一步对不同更多还原

【Abstract】 For automatic determination of the subsidence behavior of a collapsing bed, an instrument using an optical-fiber projector-receiver set, for rapid tracking and recording of the subsiding bed surface has been developed. The instrument consists of an optical-fiber probe, a photomultiplier tube, a chopper amplifier, a high speed servomotor and a machinery conjunction device, which composes an automatic rapid tracking system. The output voltage which is proportional to the motion of the subsiding solids surface is fed to an X—Y recorder and a micro-processor(PS-80) for data analysis. The instrument is applicable for any kind of powders and is not affected by their chemical or physical properties, because the probe is not in contact with powders. Experimental and calibration results indicate that the automatic rapid tracking system is stable and the tracking error is less than 1 mm.更多还原