压缩机状实时监测系统的研制

以压缩机为监测对象提出了由数据采集模块、状态监测模块和故障诊断模块组成的分布式信息处理系统的构思,阐明了基于结构层次化和功能模块化的状态监测系统的软、硬件设计方案。整个系统具有高速度、高精度、多通道、大容量和高性能价格比等特点,可广泛应用于各类大型旋转机械的状态监测。     

基于嵌入式技术的电池组远程监测系统的设计

为了实现对电池组工作状态的实时监测,设计了一种高精度、低成本的新型电池组远程监测系统。该系统以MSP430为主控制器,实现浮点数的快速运算、处理和显示功能。硬件部分设计了主控制模块、采集模块、GPRS模块等,主要实现对数据的采集和数据的无线传输功能。实际试验表明,该监测系统能实时有效地监测电池组的工作状态。     

高速动车组避雷器在线监测系统设计

高速动车组避雷器是动车组高压供电系统过电压时的重要保护设备,但在动车组运行和检修过程中避雷器处于监控盲区,无状态监测数据,因此设计了动车组避雷器在线监测系统。阐述了避雷器工作原理、等效模型,利用电压电流采集模块、信号调理模块、主控制模块等搭建了系统硬件平台,采用谐波分析法和傅里叶变换对避雷器电压电流信号进行解析,最后提出了监测系统设计参数和避雷器状态评估方法,对高速动车组避雷器状态监测具有现实意义。     

西门子开发出机械部件监测系统新产品

正近日,西门子开发出Siplus CMS1200状态监测系统,用来监测机械部件。该系统是S7-1200控制器的扩展模块,基于SM1281状态监测模块,用户可通过结合多达7个SM1281模块来创建一个高效的监测系统,而其中每个模块可连接4个振动加速度传感器和1个速度传感器,可用于连续监测机械部件,如电机、发电机、风机和泵等设备的     

工程机械液压系统在线状态监测(续)

4.在线状态监测系统的软件设计 (1)软件总体设计 软件采用模块化设计,主要包括中心调度模块、监测数据库、监测报警模块、故障诊断模块、知识库、趋势分析模块、CAN通讯模块及网络通讯模块等,软件系统的整体结构见图4。中心调度模块负责整个系统工作的调度和控制;监测数据库主要用来存放各信号采     

基于单片机控制的车辆状态监测系统设计

为进一步提升车辆驾驶的安全性和可控性,基于单片机对一种车辆状态监测系统进行了设计与研究.针对目前车辆自诊断系统的功能,对状态监测系统进行了功能设计,确定了系统通讯方案.以STM32系列单片机为核心,协同CAN总线传输模块、定位模块、远程数据通讯模块以及数据采集模块进行工作.在硬件设计方面,供电模块选用TPS系列的稳压器,GPS定位模块选用TG621S-BD为主控器.在软件设计方面,采用MySQL数据库进行数据库设计和资源管理,通过Java Web实现云数据交互.     

煤机设备无线自供电状态监测系统

针对当下煤机设备状态监测系统时效性差、通信电缆铺设困难、需要定期更换电池等问题,提出了一种基于无线传感器网络与自供电技术的监测系统设计方法。系统由能量采集模块、无线传感器网络及监测上位机组成,通过能量采集模块收集煤机设备振动能量为节点电路供电,采用无线传感器网络与上位机实现设备关键状态信息的采集、传输与处理。测试结果表明,系统可在30 m有效范围内实现对煤机设备运行状态的实时监测,能量采集模块最大输出功率可达378 mW,能够有效收集设备振动能量实现系统能源自供给。     

核电仪控系统机柜状态监测模块设计

核电仪控系统中机柜的状态关系到系统能否稳定、可靠运行。因此,机柜状态的监测是非常重要的。本文介绍的机柜状态监测模块的设计以单片机为核心,可监测机柜内温度、机柜电源、风扇电源、控制器板卡运行状态等,实现本地报警并可将机柜状态信息通过MODBUS通信上报,以便于远程操作人员了解机柜的实时运行状态。经过初步的功能和性能调试,该模块满足监测机柜状态的功能要求,且配置灵活、运行稳定,可应用于核电站安全级和非安全级系统。     

全液压推土机状态监测及故障诊断系统的研究

利用RC6-9控制器和DI2/11显示器构建了基于CAN-Bus总线的全液压推土机状态监测和故障诊断系统,介绍了整个系统的结构、功能和软件设计方法,给出了监测模块中需实时显示的被监测参数和故障诊断模块中可被识别的故障类型,达到了提高整机的安全性和可靠性的目的.     

基于复合振动能量采集器的自供电无线传感微系统研究

工业机械装备的在线实时状态监测和故障预警是保障工业生产安全、提高工业生产效率的重要手段.目前大多数机械装备的状态监测设备都存在体积大、功耗高的问题,并且依赖于电缆或化学电池供电,机动性、灵活性、环境适应性差.本文提出了一种基于复合振动能量采集器的高集成度自供电无线传感监测微系统,设计了压电-电磁-摩擦电三种发电方式复合的能量采集模块采集机械设备的振动能量,通过能源管理电路进行电能存储和整个系统供电.搭建了基于振动-温度高集成微纳传感芯片的环境信号采集及无线传输电路,并进行了低功耗电路设计.系统集成能源管理模块和传感电路模块后进行了采煤机状态监测测试.测试结果表明,该系统能够实时采集煤机装备的振动、温度信号并无线传输给上位机,同时也证明系统内的能量采集模块能够收集采煤机的振动能量并转换为电能带动传感电路模块工作,这将为工业物联网传感网络节点的自供电、无线化发展提供技术支持.     

传感器故障诊断实时监测系统设计的探讨

对大型设备运行状态监测和故障的早期诊断与预报活动中,传感器自身故障的及时发现与判别尤为重要。本文提出以设备子系统的（或某一功能的）传感器监测参数为划分原则,将单传感器的监测信号综合作为多传感器监测而进行信息的融合处理,从而判别子系统运行状态和传感器信号的真实性的构思,并探讨传感器故障诊断实时监测系统的设计方案。     

低成本微型旋转机械状态监测系统开发

针对现有机械状态监测系统体系复杂、使用成本高昂和主要面向高端企业的大型关键设备等问题,提出并开发了一种面向普通设备的低成本微型旋转机械状态监测系统。该系统以Lab-VIEW为开发平台,构建系统功能主体,以SQL Server为操作后台,构建系统管理功能,可实现普通设备轴承、齿轮、转轴的在线与离线监测,满足了普通设备状态监测与健康维护及教学实验环节的需求。     

Uncertainty estimation of reliability redundancy in complex systems based on the Cross-Entropy method

The article aims to estimate the uncertainty of possible failure events of redundancy systems based on the cross-entropy (CE) method. Failure events of subsystems and components always result in the incomplete or complete failure of engineering systems, yet optimal condition monitoring of a complex system is heavily dependent on the accuracy analysis of all the failure events of subsystems and components and their interaction effects. The CE method is a versatile tool for estimating probabilities of rare events in complex systems with the least bias beyond conditional constraints. In this paper we introduce the CE method for analyzing the system reliability with the highest uncertainty among all possibilities satisfying supplied moment constraints, and developed numerical CE algorithms capable of estimating the uncertainty of failure modes in an M-dimensional redundancy system domain with moment constraints of order up to N. A general computational framework of event estimation and condition monitoring of redundancy systems is illustrated in which the Monte Carlo simulations and CE optimization algorithms are combined. Numerical results indicate potential improvements in the measure of the uncertainty of redundancy systems that would lead to the best-fit analysis of all the complete or incomplete failure events.     

The design of a single-chip tool monitoring system for on-line turning operation

Tool condition monitoring systems play an important role in a FMS system. By changing the worn tool before or just at the time it fails, the loss caused by defect product can be reduced greatly and thus product quality and reliability is improved. To achieve this, an on-line tool condition monitoring system using a single-chip microcomputer for detecting tool breakage during cutting process is discussed in this paper. Conventionally, PC-based monitoring systems are used in most research works. The major shortcoming of PC-based monitoring systems is the incurred cost. To reduce costs, the tool condition monitoring system was built with an Intel 8051 single-chip microprocessor and the design is described in this paper. The 8051 tool monitoring system uses a strain gauge for measuring cutting force; according to the force feature, the tool monitoring system can easily recognize the breakage of the cutting tool with its tool breakage algorithm. The experimental results show that the low-cost 8051 tool monitoring board can detect tool breakage in three successive products successfully.     

Application of ferrography to contamination control in fluid power systems

The use and application of ferrography and associated analytical techniques for machinery condition monitoring are outlined.Specific application to contamination control in hydraulic systems is discussed: contamination in very clean systems is compared with satisfactorily operating equipment from the general engineering field. Results from an automatic particle counter are compared with a direct reading Ferrograph and a preliminary relationship between the two entirely different particle measuring and counting techniques is discussed.Ferrography can be used to detect operational differences between machines operating under apparently identical conditions and to identify wear and contaminant particles and is an effective technique for the condition monitoring of hydraulic systems.     

基于OPC的熔断器自动化生产监控系统设计

为了解决熔断器自动化生产中由于不同厂商设备组成的各个子系统之间的通信问题,采用了OPC技术设计了熔断器自动化生产监控系统,从而实现了每个工序设备之间的连锁,以及单台设备工控机之间的通信。经运行验证,基于OPC技术实现的熔断器自动化生产监控系统运行稳定可靠,该技术具有一定的推广价值。     

Distributed monitoring and diagnosis system for hydraulic system of construction machinery

This paper mainly presents a distributed monitoring and diagnosis system for the hydraulic system of construction machinery based on the controller area net (CAN) field bus. The hardware of the distributed condition monitoring and fault diagnosis system is designed. Its structure including the sensors, distributed data acquisition units, central signal processing unit, and CAN field bus is introduced. The software is also programmed. The general software design and its realization are studied in detail. The experiments and applications indicate that the distributed condition monitoring and fault diagnosis system can effectively realize its function of real-time online condition monitoring and fault diagnosis for the hydraulic system of construction machinery.     

Distributed monitoring and diagnosis system for hydraulic system of construction machinery

This paper mainly presents a distributed monitoring and diagnosis system for the hydraulic system of construction machinery based on the controller area net (CAN) field bus. The hardware of the distributed condition monitoring and fault diagnosis system is designed. Its structure including the sensors, distributed data acquisition units, central signal processing unit, and CAN field bus is introduced. The software is also programmed. The general software design and its realization are studied in detail. The experiments and applications indicate that the distributed condition monitoring and fault diagnosis system can effectively realize its function of real-time online condition monitoring and fault diagnosis for the hydraulic system of construction machinery.     

物联网环境下的机械系统状态监测技术展望

论述了物联网环境下机械系统状态监测技术的新发展,指出开展机械系统的可监测性设计是物联网环境下实施机械系统状态监测技术的基础,研发符合物联网特征的在线监测传感器及其系统是物联网环境下开展机械系统状态监测的保证,建立物联网环境下的机械系统状态监测技术标准体系是机械系统状态监测技术快速发展的支撑。     

FMS 状态监测与故障诊断总体方案探讨

从柔性制造系统（ＦＭＳ）的故障机理入手，分析研究了ＦＭＳ状态监测与故障诊断总体框架及策略，包括：ＦＭＳ状态监测方法，ＦＭＳ故障简易诊断与精密诊断策略，ＦＭＳ状态监测与故障诊断分层实现模型。