基于DSP的油路磨粒检测系统信号处理模块设计

发布时间：2018-04-06 04:05

本文选题：数字信号处理　切入点：Visual　出处：《电子科技大学》2012年硕士论文

【摘要】：在各种机械设备中，由于在运转的过程中各种部件之间会摩擦从而导致磨损，随着时间的增长，摩损程度也越来越大，要是对这些磨损情况不了解可能会导致机器损毁等各种不可预料的事故发生。导致机械设备零件失效的原因主要有三个：腐蚀、磨损以及疲劳，其中磨损导致的占了八成左右。多数的检测和维修都是在机械设备出现了问题而不能继续工作后再对其进行维修处理，这样就影响了机器的效率，设备安全也不能保障。所以现在研究故障检测主要是研究预知性检测及维修，即在设备出现故障初期就被检测出来，然后对其进行采取相应的矫正措施加以维修，这样就提高了硬件设备的安全性从而延长了其工作寿命，也提高了效率。本系统设计的目的是对机械设备油路里面的磨粒进行在线检测，实时的对设备运行状况进行报告。本文主要介绍了磨粒检测系统的后端信号处理系统，此系统是以ADI公司的ADSP-BF531为核心，，外围电路包括模数转换电路、电平转换电路、通信电路及其它外围电路。软件部份设计主要是针对前端模拟信号做出处理，得出油道中磨粒的特性与其产生的信号之间的关系。这些特性包括颗粒的大小、磁性以及数目等，最后通过液晶显示器把磨粒特性信息呈现给用户。在此设计中关键部分是找到信号与颗粒特性之间的关系，在处理中运用了很多的算法处理，本文对此问题做出了深入的研究分析。系统在多次试验后对颗粒的特性做出准确的判断，系统运行稳定，满足了设计的需求。
[Abstract]:In all kinds of machinery and equipment, the friction between various parts in the course of operation will lead to wear and tear, and over time, the degree of friction will become more and more serious.Failure to understand these wear and tear conditions could lead to various unforeseen accidents, such as machine damage.There are three main reasons for failure of mechanical parts: corrosion, wear and fatigue, of which about 80% are caused by wear.Most of the inspection and maintenance are done after the mechanical equipment has problems and can not continue to work, which affects the efficiency of the machine and the safety of the equipment can not be guaranteed.So now the research on fault detection is mainly about predictive detection and maintenance, that is, it is detected in the early stage of equipment failure, and then it is repaired by corresponding corrective measures.In this way, the security of hardware equipment is improved, thus prolonging its working life and improving its efficiency.The purpose of this system is to detect the abrasive particles in the oil circuit of mechanical equipment on line, and to report the running condition of the equipment in real time.This paper mainly introduces the back-end signal processing system of abrasive particle detection system, which is based on the ADSP-BF531 of ADI Company. The peripheral circuits include A / D conversion circuit, level conversion circuit, communication circuit and other peripheral circuits.The software is mainly designed to deal with the analogue signal of the front end, and the relationship between the characteristics of the abrasive particles in the oil channel and the signal produced by it is obtained.These characteristics include the size, magnetism and number of particles. Finally, the information of abrasive particles is presented to the user via liquid crystal display (LCD).The key part of this design is to find out the relationship between the signal and particle characteristics, and a lot of algorithms are used to deal with the problem.After many experiments, the system makes accurate judgment on the characteristics of particles, and the system runs stably and meets the requirements of the design.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH165.3

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