在多相流变质参数测量中数据交换的实现方法

本文主要介绍在间接式多相流变介质参数测量中，８０９８多机系统串行通讯的实现方法。在讨论系统结构的基础上，着重说明实现实时参数交换的接口和软件设计和特点。     

多相流多参数动态测量技术发展与应用

本文在充分强调多相流量领域的发展对２１世纪全球所面临的生态环境和能源资源等可持续发展中的关键技术问题的重大意义的基础上,简述了该领域国内外发展现状和最新动态。     

多相流测量在石油工业中的应用前景

本文从石油工业生产的需求出发，归总了目前国内外几种具有应用前景的多相流量计的基本原理、主要技术指标、计量准确度、试验和测试情况，同时也简介了相应的多相流标定技术的发展，使人们对多相流测量技术以及在石油工业中的应用有一个概念性的了解。     

多相流测量在石油工业中的应用前景

本文从石油工业生产的需求出发，归总了目前国内外几种具有应用前景的多相流量计的基本原理、主要技术指标、计量准确度、试验和测试情况，同时也简介了相应的多相流标定技术的发展，使人们对多相流测量技术以及在石油工业中的应用有一个概念性的了解。     

软测量技术在多相流检测中的应用

本文综述了软测量技术在多相流检测中的应用.在简要阐述软测量技术基本原理和特点的基础上,介绍了基于机理分析、人工智能、过程层析成像和动态信号分析等多相流检测领域中的软测量方法,并分析了目前该技术应用中存在的问题.     

多传感器数据融合技术在多相流参数测量中的应用

对于多相流动系统,由于多传感器系统比单传感器具有优越性,所以,数据融合技术在多相流参数检测领域的应用越来越受到关注.对多传感器数据融合技术作了回顾,介绍了多传感器数据融合技术在多相流参数检测,如流型辨识、多相流流体界面分布成像等方面的应用情况,并对这项技术在多相流参数检测方面所面临的挑战和前景作了分析.     

过程层析成像与多相流测量应用

过程层析成像技术(Process Tomography,简称PT)由于其非侵入与可视化等特性在医疗与工业过程等领域有广泛的应用前景,已从实验室研究进入工业应用研究阶段。本文介绍了基于光学、电学、超声以及核子敏感性原理的PT技术与多模态PT技术,并简述了PT技术在多相流测量中的应用研究方向。     

一种实现AutoCAD图形数据交换的方法

讨论了利用ObjectARX技术从Auto—CAD图形中提取数据信息，并将这些信息存储到数据库中的方法，该方法能够快速、有效地实现基于外部数据库的AutoCAD图形的数据交换。     

多相流动参数检测中过程层析成象技术的发展及应用

本文叙述了过程层析成象技术的研究背景、发展应用、需要解决的问题。同时简介几种工业过程层析成象原理。     

管道中固体速度的测量现状及发展趋势

本文介绍了空气动力传送管道中固体速度的各种测量方法和各自的特点,并对各种方法及使用的传感器进行了讨论。     

MCGS组态软件与VB数据交换的实现

针对MCGS（Monitor and Control Generated System,简称MCGS）与VB之间的数据交换问题,基于对象的链接与嵌入（Object Linking and Embedding,简称OLE）自动化技术和DDE数据交换技术,研究了MCGS与VB之间的两种数据交换方法,实现了MCGS与VB的实时数据交换。运行结果表明,上述两种数据交换方法具有较好的实时性、稳定性和可靠性。     

Flow measurement method of complex flow in heat exchange casing

Fluid plays an important role in engineering application and the accurate control of the carrier is the premise of energy efficient conversion and management, such as the primary air volume of the boiler, the reactor inlet flowrate, the amount of oil and air intake of internal combustion engine, etc. Therefore, flowmeter plays an important role in energy conversion and management. In this work, a high-low frequency combined with reflection-penetration synchronization flowmeter was designed to measure the flowrate in casing device based on the characteristics of different frequencies of sound. The flowrate calculation method of casing device is given and verified by numerical simulation. The results show that the flowrate of different flow states can be calculated accurately by using the high-low frequency combined with reflection-penetration synchronization method. At the same time, the method can also be used in electromagnetic wave, optical and other fields.     

基于虚拟立体视觉的气液两相流三维测量系统的标定

研究了基于虚拟立体视觉的气液两相流三维测量系统的标定技术。首先,基于单台高速摄像机和两组反射镜组构建虚拟立体视觉测量系统,建立高速摄像机透视投影变换模型以及虚拟立体视觉三维测量模型,对虚拟立体视觉系统中摄像机及虚拟立体视觉传感器进行标定。用靶标基准球模拟气泡在水中的分布,以其空间距离作为测量评价指标,比较了不同标定方法对三维重建精度的影响。实验结果表明,将标定参照物置于水箱内,并且分别对左、右虚拟摄像机及传感器进行标定,三维重建精度最高,测量空间距离绝对误差优于0.13 mm,相对误差优于0.49%。实验认为,对基于虚拟立体视觉的气液两相流三维测量系统进行标定时,必须充分考虑折光分光光路以及管壁折射对三维重建所带来的影响。     

Simultaneous measurement of continuous and dispersed phase in a two phase jet flow

In the present paper, a method is proposed and applied in order to increase the size range sensitivity of a Phase–Doppler–Anemometry (PDA) system, allowing simultaneous measurement of size and velocity distributions of continuous and dispersed phases in gaseous, dispersed two phase flow. Discrimination between the two phases is directly achieved here from the detected phase difference. Design considerations are presented to increase the size range sensitivity of the PDA system to 1:200. Therefore, the optical properties for light scattering of the particles are properly adjusted to the measurement problem by colouring the particles homogeneously. The application of the system is described by measurements of velocity profiles in a zone close to the nozzle of a two phase jet with a tracer to particle diameter range of 1–160 μm.     

Quantifying impacts on the measurement uncertainty in flow calibration arising from dynamic flow effects

Traceability of the measurement units in fluid flow metering, as the state-of-the-art approach, is practiced as a so-called element-by-element method which relies upon the idealistic assumption that the measurement process in a flow calibration facility can be run under exact steady-state conditions, that is, absolutely no fluctuations of the flow quantities are assumed to occur during the flow measurement process. Practical experiences, combined with a model-based analytical view of the measurement process in a flow standard, have revealed that dynamic impacts on the measurement uncertainty due to flowrate fluctuations have to be taken into account, in addition to the steady-state traceability chain.     

Simple installation for measurement of two-phase gas–liquid flow by means of conventional single-phase flowmeters

The paper describes a method of measuring the flow rate of the components of a two-phase gas–liquid mixture. The proposed method ensures the separation of two phases using a rather simple modification of pipeline configuration than using separating vessels to achieve this aim. The two components can then be measured using conventional single-phase flowmeters. The errors of the separating and metering installation are about ±(3–4)% in the flow rate range 3:1.     

Concentration measurement of three-phase flow based on multi-sensor data fusion using adaptive fuzzy inference system

This paper proposes a new method for the volumetric-concentration measurement of coal/biomass/air three-phase flow using multi-sensor data fusion techniques. The method integrates capacitive and electrostatic sensors and incorporates the data fusion model of an adaptive network based fuzzy inference system (ANFIS), which simulates the human׳s understanding of things. The features of the two sensor signals are extracted as the input of the ANFIS under various experimental conditions. The fusion model of the ANFIS establishes the relationship between the volumetric-concentration of the solid phase and the signal features by training with two different learning rules: the gradient descent method only and the hybrid method combining the Kalman filter algorithm with the gradient descent algorithm. Experimental results show that the ANFIS based on the hybrid learning rule outperforms the system based on the gradient descent learning rule and that the fiducial error for biomass and pulverized coal flows are 1.2% and 0.7%, respectively.     

基于暗态扫频法的Rb-Xe自旋交换体系弛豫时间测量方法

在⁸⁷Rb-¹²⁹Xe自旋交换体系中,⁸⁷Rb和¹²⁹Xe弛豫时间的准确测量对于磁共振陀螺及磁力仪相关应用非常重要。针对该需求,分析了泵浦光与激励磁场对⁸⁷Rb弛豫时间的影响以及暗态下的⁸⁷Rb和¹²⁹Xe自旋交换过程,并在理论分析基础上提出了暗态扫频测量方法。实现了对⁸⁷Rb以及¹²⁹Xe的纵向弛豫时间的测量。使用本方法测得了⁸⁷Rb的横向弛豫时间和纵向弛豫时间分别为1.36和5.18 ms,¹²⁹Xe的纵向弛豫时间为519 s,其拟合R²=0.999 9,具有极高的拟合优度。相较于以往的测量方法,暗态扫频法可以彻底消除泵浦光造成的磁场梯度的影响,具有高准确度的优点且操作简便。研究对磁共振陀螺及磁力仪的性能分析与标定具有较高的参考价值。     

矩形电容层析成像传感器仿真模拟和实验测量

常规电容层析成像传感器为规则对称方形或圆形结构,其测量和成像算法已相对成熟.由于受循环流化床旋风分离器入口结构段的限制,上述传感器结构已不能应用在旋风分离器入口段的测量,因此为了研究大型化循环流化床多旋风分离器并联布置入口段固体颗粒浓度分布,提出和设计了一种矩形非常规电容传感器,该传感器为12电极结构,在每个入口段的短边布置2个电极,长边布置4个电极,成像敏感场仿真计算基于Ansoft-Maxwell软件.对此传感器进行了静态仿真模拟研究和静态实验测量,对不同激励电压和频率测量结果进行分析,并对测量结果进行误差分析,得到矩形不规则电容传感器最佳测量参数(激励电压和频率),并对循环流化床分离器入口段进行了动态测量.结果表明,这种矩形非常规电容传感器可以用于循环流化床冷态试验台的旋风分离器入口段的直接测量,测量结果对改进旋风分离器的布置方式有参考意义.     

脉动流平均流量测量方法的研究

为了解决平均流量测量影响作业段或研究区域内脉动流动效果的问题,借鉴脉动流发生和衰减机理,提出了一种成本低、操作简单的脉动流量平均值测量方法,主要包括风机入口前设置大管径引风段、入流方向与脉动发生器正交连接和在引风段设置测试点等3方面措施。搭建了相关的实验系统,并进行了测量研究。研究结果表明,简易脉动流量测量法能够同时保证作业区域内存在高效的脉动流动,测速区域内为稳态流动;对平均流量较高的脉动状态具有更好的测量效果。