单片机采煤机液压系统故障诊断系统的应用研究

介绍一种新型单片机采煤机液压系统故障监测装置，分析阐述了其系统硬件结构功能特点及其与８９Ｃ５１单片机的连接方法。     

ATM/SDH接口的管理:CLR QoS的在线监测

通信网的管理对服务质量至关重要。在实际的网络中,需要对各个子网和网络单元进行良好的管理和控制。 文章从系统的角度分析了ATM/SDH接口的管理,并着重讨论了CLR QoS在线监测问题。     

掘进机液压系统故障诊断专家系统的研究

文章对专家系统技术在设备故障诊断方面的应用进行了研究与探讨。建立了一个煤巷掘进机液压故障诊断专家系统，介绍了系统的结构、知识表示、推理机制及知识获得等。     

KJ95型煤矿综合监控系统

ＫＪ９５型煤矿综合监控系统是集散型和分级管理的计算机实时监控系统。文章介绍了该系统的组成、主要功能及特点。     

基于微机图象处理的滑油磨粒测量与分析系统

介绍了一种滑油磨粒测量与分析系统。该系统运用计算机图象处理技术，对机械设备滑油中磨粒显微形态测量与分析，并给出设备当前磨损状态的铁谱报表和诊断结论。监测实例表明，该系统显著地提高了状态的铁谱报表和诊断结论。监测实例表明，该系统显著地提高了机械设备磨损状态监测与故障诊断的准确性和自动化水平，具有较高的推广应用价值。     

Design of artificial neural networks for tool wear monitoring

An on-line scheme for tool wear monitoring using artificial neural networks (ANNs) has been proposed. Cutting velocity, feed, cutting force and machining time are given as inputs to the ANN, and the flank wear is estimated using the ANN. Different ANN structures are designed and investigated to estimate the tool wear accurately. An existing analytical model is used to obtain the data for various cutting conditions in order to eliminate the huge cost and time associated with generation of training and evaluation data. Motivated by the fact that the tool wear at a given instance of time depends on the tool wear value at a previous instance of time, memory is included in the ANN. ANNs without memory, with one-phase memory, and with two-phase memory are investigated in this study. The effect of various training parameters, such as learning coefficient, momentum, temperature, and number of hidden neurons, on these architectures is studied. The findings and experience obtained should facilitate the design and implementation of reliable and economical real-time systems for tool wear monitoring and identification in intelligent manufacturing.     

Microprocessor controlled three-way catalyst efficiency monitoring system

The present paper describes a new design for a microcontrolled three-way catalyst efficiency monitoring system. The system is based on the Motorola 68HC11e2 microprocessor and utilizes the differential signal from a pair of thermocouples installed at the catalyst outlet and inlet sections. This signal is processed in real time using an appropriate statistical algorithm and the corresponding results are compared to experimentally determined limiting values to assess the current state of the catalyst efficiency during driving conditions. The result of this comparison is presented on an LCD display as an A, B, C, or FAIL catalyst condition signal. The system can be readily installed and can operate on new and used cars provided that the type of catalyst used has been experimentally tested to provide the necessary limiting values that characterize its relative levels of efficiency. It can also be reprogrammed and calibrated via a RS232C serial interface.     

避雷器放电电流在线监测装置的研制与开发

本文论述了避雷器放电电流在线测量的可行性，并围绕装置研制过程中的有关问题进行了讨论，尤其针对避雷器放电瞬高地电位及变电站强干扰等问题进行了研究和处理。     

重型车刀破损时声发射信号特征

通过切削试验，研究了重型车削过程中各种声发射源产生的ＡＥ信号的特征，着重讨论了重型车刀破损时产生的ＡＥ信号与刀具正常切削时刀具经过硬质点、夹渣、铲坑以及断续切削和切屑的断时产生的ＡＥ信号之间的差异，从而找到了由声发射信号来判定刀具破损的方法。     

变电所微机保护与监控系统

研究了如何利用工业控制微机 IPC 实现对变电所的保护与监控 ,较详细地介绍监控系统的结构组成特点 .实现了微机监控与全数字继电保护技术的有机结合 .运行表明 ,可增强变电所的控制保护功能 ,提高自动化程度 ,同时也提出了实际运行中存在的下位微机在恶劣环境中抗干扰等问题