Development of fault diagnostic system using deep knowledge on the structure and function of instruments

自然而然地，工业领域中使用的所有仪器都是工程师设计的人工制品，它们的行为是从它们的设计信息中衍生出来的。此外，还可以通过对信息的分析得到它们的拆卸/组装方法，并导致界面的自动生成，给出一个简单的解释。本研究旨在开发这样一种智能故障诊断系统。本文主要研究了以下三个方面的工作：(1)咨询系统的开发：从被检定仪器的描述出发，推导出可能的拆卸方法，并选择最有效的拆卸方法到达诊断系统所怀疑的部件。在这种情况下，生成优美的图形解释，使用户不会误解待拆卸对象。(2)拆卸方法和仪器行为的推导：使用手册中给出的标准组装顺序，获得了比(1)中更有效的拆卸方式。自然，目标被分成几个模块，每个模块完成后，整个目标就完成了。通过分析文本和估计机械零件之间的连接关系，可以找到装配行为和有效的拆卸方法。(3)对手册中插图的理解：口头解释并不总是作为一种指导方法，特别是在告诉如何拆卸/装配对象时。要理解手册中的文本，需要识别所附插图的含义。辅助线是确定零件方向的关键，其结果约束了要与零件匹配的零件的方向。

Naturally all instruments used in industrial fields are artifacts designed by engineers then their behavior are derived from their design information. In addition to the fact, the method for disassembling/assembling them can be obtained through analysis of the information and it leads to an automatic generation of interface which gives us a plain explanation. The research aims to develop such an intelligent fault diagnostic system. For the purpose the following three works have been studied.(1)Development of consulting system: From the description of the instrument to be examined, possible ways to disassemble it are derived and the most efficient one is selected to reach the component suspected by the diagnostic system. In this case, graceful graphic explanation is generated for the user not to misunderstand the object to be disassembled.(2)Derivation of disassembling method and behavior of an instrument: More efficient disassembling way than that obtained in (1) are obtained using a standard assembling sequence which is given in a manual. Naturally objects are divided into several modules, and the whole object will be completed after each module have been achieved. By analyzing texts and estimating what kind of joint relations are made among mechanical parts, the behavior of the assembly and efficient disassembling way can be found.(3)Understanding of illustration in manual: Verbal explanation is not always adequate as a method to give instruction, especially to tell how to disassemble/assemble an object. To understand texts in a manual needs to recognize the meaning of an illustration attached to them. Auxiliary lines are the key to determine an orientation of a parts and the result constraints the orientation of the parts to be mated with the one.