高性价比控制仪表设计分析

本文介绍XK3190-C8+控制仪表的仪表用途、硬件设计、软件特色,并从这几个方面论述该仪表的设计特色及高性价比的实现细节,引导衡器系统及非衡器系统控制领域的工作人员充分了解和正确使用这款仪表,在提升系统集成工作效率的同时,实现项目经费资源的最优配置。     

多用途高速配料包装控制仪表设计分析

本文介绍了XK3190-C606+配料包装专用控制仪表的用途、硬件结构、软件功能特色和工作模式,并从这几个方面展开深入分析,通过挖掘该仪表的特色化设计亮点,引导衡器系统控制领域的工作人员充分了解和正确使用这款仪表,提高系统集成的工作效率。     

介绍一款新型的控制仪表

本文介绍了XK3190-C602仪表的主要功能、特点、应用注意事项,介绍了C602仪表配套的上位机软件C602TX以及如何正确地设置参数使系统达到最佳的性能。     

自动配料集散式微机控制系统的设计——凌钢焦化厂配煤生产线不停产改造工程

叙述了一种采用集散控制技术的自动配煤系统。具体介绍了系统的构成,秤体的设计特点,实时控制设计,过程控制及实现。配煤准确率由人工配煤的60％上升到90％以上,年经济效益600万元。     

气体分馏装置总线控制和安全仪表系统的设计

简述了气体分馏装置的工艺流程,以气体分馏装置为例,详细介绍了该装置FF现场总线系统,FF网段设计原则,FF网段负载计算等。气体分馏装置主要化学产物为丙烯、碳四馏分等,均为易燃易爆介质。该装置的生产安全性要求较高,因此设计了安全仪表系统,包括火灾隔离阀、可燃气体检测报警器、高速泵、氮气加热器和氮气鼓风机的安全联锁系统的设计。     

光电测试仪器遥控键盘的设计

介绍了用普通电视机遥控器、HS0 0 38红外接收器和 89C2 0 5 1单片机设计红外遥控部件的方法 ,该部件可以简单实现仪器仪表的遥控。它可以作为新型仪器的部件进行设计 ,也可作为附件改造现有的在线测试仪器     

基于PROFIBUS-DP称重仪表的设计

本文阐述了基于PROFIBUS-DP通信称重仪表的设计方法,通过SPC3集成电路使称重仪表实现了与主站的通信,完成通信协议的转换。     

便携式无线称重仪表的抗干扰设计

在当今衡器行业,便携式无线称重仪表以其轻巧、实用的特点而得到了广泛的应用.为了应对激烈的市场竞争,各衡器生产厂家陆续推出了自己的产品,从而造成了许多生产厂家的低价倾销,打价格战.实际上这些产品面向的是国内的低端客户,产品在设计上就是"最大限度降低成本",而很少会考虑如何提高抗干扰能力,因为这将增加产品的成本,市场上许多...     

Vibrational control of underactuated mechanical systems control design through averaging analysis

An open loop vibrational control for an underactuated mechanical system with amplitude and frequency modulation is investigated. Since there is no direct external input to an unactuated joint, the dynamic coupling between the actuated and unactuated joint is utilized for controlling the unactuated joint. Feedback linearization has been performed to fully incorporate the known nonlinearities of the underactuated system considered. The actuated joints are firstly positioned to their desired locations, and then periodic oscillatory inputs are applied to the actuated joints to move the remaining unactuated joints to their target positions. The amplitudes and frequencies of the vibrations introduced are determined through averaging analysis. A systematic way of obtaining an averaged system for the underactuated system via a coordinate transformation is developed. A manipulator in the zero gravity space can be vibrationally controlled in the event of actuator failure. A control design example of the 2R planar manipulator with a free joint with no brake is provided.     

面向智能仪表的嵌入式操作系统设计

用现代操作系统设计思想，提出设计源代码开放的面向智能仪表嵌入式操作系统的思想，用户可以利用嵌入式操作系统所提供的应用程序编程接口(API)调用操作系统资源．并根据应用对嵌入式操作系统进行裁减，从而缩短在智能仪表设计中的软件设计周期。     

XK3190系列典型控制仪表的原理与常见故障分析

本文详细介绍了XK3190-C602、C8两种仪表的工作原理与常见故障分析,并举例说明故障的原因及解决方法,以便我们在今后的工作中更好的掌握。     

Use of design of experiments and Monte Carlo method for instruments optimal design

A common issue in the design of measurement instruments is the comparison between different solutions in terms of components of the measurement chain, data processing or even measurement principles; the predicted instrumental uncertainty is the driving parameter for such a comparison. While in many situations the linearization of the measuring model allows using the standard ISO GUM procedure, in complex cases it might be necessary to proceed with Monte Carlo simulations as per ISO GUM supplement 1. This paper describes a method that combines the factorial design of experiments (DOE) and the ISO GUM supplement 1 uncertainty evaluation method to guide the instrument designer in the instrument configuration optimization. The proposed approach allows estimating, in the design phase, the overall instrumental uncertainty for different configurations, the instrument sensitivity to the accuracy in the measurements of its inputs and the effects on systematic and random measurement errors deriving from the choice of all instrumental variables. The use of data populations selected with the DOE criteria allows recovering valuable parameters equivalent to the sensitivity factors of the GUM linearized approach. The data analysis allows separating the critical factors that must be accurately controlled from those only weakly affecting the measurement uncertainty. The method has been applied to a case study where the metrological performances of a system devoted to the measurement of the acoustic radiation emitted by a vibrating panel in a reverberant enclosure had to be assessed.