Wireless Condition Monitoring System for Fault Diagnosis of Rotating Machinery: Development and Application

Abstract

A condition monitoring for rotary machinery is generically defined as the behavior of physical structures and processes give valuable information about their condition and performance. This information can be used to improve safety, reliability and performance of the monitored physical structure. Complex systems of today require efficient and intelligent monitoring strategies which will help forming cause-effect relations between certain variables and problems. Wireless sensing is a promising technology for monitoring applications due to its advantages, e.g., in installation times and costs. The benefits of installing a monitoring system in a structure are multiple, which include opportunities to assess the health of the structural system over its expected lifespan. Using available technologies from the marketplace, a low cost alternative to traditional wire-based sensing systems has been developed. The introduction of wireless communications is of paramount importance because it significantly reduces the cost associated with installation and maintenance of wire-based monitoring systems. In addition, efficient data transfer is supported between sensing units through wireless peer-to-peer communications. A wireless modem on the 2.4 GHz radio band serves as the wireless communication channel between hardware system and software system. Using spread spectrum encoding techniques, reliable communications of up to 500m was attained. 3D feature monitoring methods can reduce a dimension in multi-state will serve as a catalyst for variety sensor adoption of health monitoring and diagnostic engineering. In order to assess the status of machines, vibration is an effective parameter that indicates a dynamic behavior response but not to all. In large-scale monitoring, the reductions of the dimension of the signal are essential to a diagnostic and assessment engineering. In this regard, 3D feature supplies a good ability for the scale reduction and feature extract method. Furthermore, the system being developed will be utilized gathering information from physical layer. Many systems were successfully implemented over the last decade. However these systems are often hard to use and designed for a signal acquisition purpose. In this thesis, a wireless monitoring system is developed and it can be defined as a real-time and on-line monitoring system to be used for multi-parameter monitoring of physical structure and processes. A real-time monitoring application has characteristics such as flexibility and reliability. Proposed 3D feature monitoring confirmed through application case.