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flow rate measurement     
相关语句
  流量测量
     Neural Network Flowrate Measurement Based On Genetic Algorithms
     基于遗传算法神经网络流量测量
短句来源
     Theoretical analysis and experimental investigations show that the digital dynamic flowrate measurement system has advantages of low cost, smaller inertia; better dynamic properties, and higher accuracy of measurement. It offers an effective measurement means to the investigation of dynamic characteristics of electrorheological fluid damper.
     研制出一种新颖的数字式动态流量测量系统.该系统通过测量某瞬时传送微小体积流体的时间获取系统瞬态流量值.理论分析和实验研究表明,该动态流量测量系统具有成本低、惯性小、动态性能好、测量精度高等特点,为局域电流变流体阻尼器的动态特性研究提供了有效测量手段.
短句来源
     As shown,the accuracy of float and glass tube is of great significance,especially in low flowrate measurement.
     分析表明浮子的最大截面尺寸和玻璃管尺寸的精度对流量测量,尤其是小流量时的测量精度影响最大。
短句来源
     Digital Dynamic Flowrate Measurement System and Analysis of Its Characteristic
     数字式动态流量测量系统及其特性分析
短句来源
     Five flowrate measurement models of Venturi meter are analyzed. Primary study has been taken to measure the total mass flowrate and the liquid-phase mass flowrate.
     分析了几种文丘里管气液两相流流量测量模型,并应用这些模型进行了油气两相流总质量流量和液相质量流量测量的初步研究。
短句来源
更多       
  流量测量
     Neural Network Flowrate Measurement Based On Genetic Algorithms
     基于遗传算法神经网络流量测量
短句来源
     Theoretical analysis and experimental investigations show that the digital dynamic flowrate measurement system has advantages of low cost, smaller inertia; better dynamic properties, and higher accuracy of measurement. It offers an effective measurement means to the investigation of dynamic characteristics of electrorheological fluid damper.
     研制出一种新颖的数字式动态流量测量系统.该系统通过测量某瞬时传送微小体积流体的时间获取系统瞬态流量值.理论分析和实验研究表明,该动态流量测量系统具有成本低、惯性小、动态性能好、测量精度高等特点,为局域电流变流体阻尼器的动态特性研究提供了有效测量手段.
短句来源
     As shown,the accuracy of float and glass tube is of great significance,especially in low flowrate measurement.
     分析表明浮子的最大截面尺寸和玻璃管尺寸的精度对流量测量,尤其是小流量时的测量精度影响最大。
短句来源
     Digital Dynamic Flowrate Measurement System and Analysis of Its Characteristic
     数字式动态流量测量系统及其特性分析
短句来源
     Five flowrate measurement models of Venturi meter are analyzed. Primary study has been taken to measure the total mass flowrate and the liquid-phase mass flowrate.
     分析了几种文丘里管气液两相流流量测量模型,并应用这些模型进行了油气两相流总质量流量和液相质量流量测量的初步研究。
短句来源
更多       
  流量计量
     Flowrate Measurement and Mathematical Methods Used
     流量计量与数学方法
短句来源
     A Intelligent Data Acquisition System with Mutiple Channels for Flowrate Measurement
     一种多通道流量计量智能化采集系统
短句来源
     The author describes the approximation and method of undetermined coefficients used in the practice of flowrate measurement.
     介绍了笔者在流量计量实践中所用过的逼近法和待定系数法。
短句来源
     Introduces a intelligent data acquistion system with 9 channels for flowrate measurement using MCS-51 single chip computer and LL-25 model rotz flowmeter.
     文中介绍了一种利用MCS—51单片机和LL—25型腰轮流量计实现的九通道流量计量智能化采集系统。
短句来源
  流速测量
     2. Developed a runoff rate on-line measurement system based on correlation flow rate measurement theory by using Lab VIEW virtual instrument platform. The virtual instrument consists of the infrared photoelectric sensor, the signal processing circuit, the PCI-6040E data acquisition card as well as the correlation survey software programmed by LabVIEW.
     2.基于相关流速测量理论,采用图形化编程语言LabVIEW虚拟仪器开发平台构建了一套径流流速在线测量系统,包括红外光电传感器、信号调理电路、PCI-6040E数据采集卡以及使用LabVIEW开发的相关测量软件,构成了虚拟仪器。
短句来源
     According to the approximation of the velocity profile of turbulent flow in cylindrical pipes, flow rate measurement based upon the maximum velocity of circular cross-section is proposed.
     根据已知圆管紊流流速分布的近似模地,研究了使用管道轴线处的最大流速测量流量的方法。
短句来源

 

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      flow rate measurement
    An instrumentation and automation system for a side-vented pan coater with a novel air-flow rate measurement system for monitoring the film-coating process of tablets was designed and tested.
          
    Accurate and reliable process air flow rate measurement proved critical in controlling the granulation process.
          
    1 system for fluidized bed granulator automation with in-line multichannel near infrared (NIR) moisture measurement and a unique air flow rate measurement design was assembled, and the information gained was investigated.
          
    Use of converging tube sections of noncircular penstocks for flow rate measurement by the velocity-area method
          
    Quickly changeable device for gas and liquid flow rate measurement
          
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    The present paper deals with an elementary principle of a new measurement of runoff with very low discharge by means of resistance measuring-flow, and the nonlinear Flow-Voltage relationships with the resistance measuring-flow. A method of linearization handling is provided to make the Measuring-Runoff Flume in a better linear relationship. The analysis of dynamic response charactertics of Resistance Measuring-flow Flume is based on system dynamics theory, as a result, system parameters...

    The present paper deals with an elementary principle of a new measurement of runoff with very low discharge by means of resistance measuring-flow, and the nonlinear Flow-Voltage relationships with the resistance measuring-flow. A method of linearization handling is provided to make the Measuring-Runoff Flume in a better linear relationship. The analysis of dynamic response charactertics of Resistance Measuring-flow Flume is based on system dynamics theory, as a result, system parameters ωn and ζ are obtained for judging regulating-storage of measuring-flow device' The Measuring-flow Flume has been applied to measure small discharge in the Hydro-logic Runoff Laboratory. As it belongs to instantaneous flow-rate measurement method, the runoff hydrography measured is very clear as regards its duration, peak discharge, lag of time, and relevant parameters. In addition, the device has a higher stability of electronic circuit and better signal-to-noise ratio, and the problem of electolytic action at electrodes surface due to impurity of the water has been solved, so it is more convenient to make research of the rainfall-runoff relationship in laboratory. Finally, in this paper a comparison of cumulative sum of hydrography from Resistance Measuring-flow Flume with cumulative water-volume-method is given, and satisfactory results have been obtained.

    本文就电阻法测流的电压-流量非线性关系进行了探讨,提出了线性处理的方法,并设计了具有良好线性关系的测流槽。加上电测线路的高稳定性与测流系统较优的讯噪比,使得实验室降雨迳流模拟实验的分析研究十分方便。另外,还解决了由于水质不纯而导致的电极极化效应。最后,文章给出电阻法测流与体积法的精度对比结果。

    Theory, apparatus and application of this method are described in this paper. In a laboratory pipe, the air flow rate is measured by this method with a helium tracer. The results are compared with the data got from a standard pitot tube in the same conditions, and the relative error is very small. The above method is also used in Beijing Coking and Chemicals Plant for measuring the inlet coke oven gas flow rate of one large and another medium scale compressors, the systemetic errors of experiment are calculated....

    Theory, apparatus and application of this method are described in this paper. In a laboratory pipe, the air flow rate is measured by this method with a helium tracer. The results are compared with the data got from a standard pitot tube in the same conditions, and the relative error is very small. The above method is also used in Beijing Coking and Chemicals Plant for measuring the inlet coke oven gas flow rate of one large and another medium scale compressors, the systemetic errors of experiment are calculated. It is showed in practice that this tracing method of gas flow rate measurement can be used in the condition which is inavailable for common flow rate measuring instruments. It is disscusscd for further improving the measuring precision.

    阐述了气体流量示踪法测量的原理、装置和应用。在实验室管道上试验了用氦气作为示踪剂的流量示踪法测量技术,测定了管内空气的流量并和标准皮托管测量计算结果进行了比较,相对误差很小。又对北京焦化厂2台大、中型煤气压缩机入口流量用此法进行了测定,并计算了系统误差。实践表明,这种气体流量示踪法测量的特点是能够用于一般流量测量仪器难于适应的场合。对进一步提高测量精度进行了讨论。

    The differential pressure noise of two phase flow through a throttle set is caused by space stochastic distribution of the phase concentration. Amplitude of the noise is increased when the flow is through an obstruction (for example, an orifice). The paper demonstrates that the variance of the noise of differential pressure square root is approximately directly proportional to the flow rate of disperse phase with separated flow model of two phase flow under the assumption that the variance of disperse phase...

    The differential pressure noise of two phase flow through a throttle set is caused by space stochastic distribution of the phase concentration. Amplitude of the noise is increased when the flow is through an obstruction (for example, an orifice). The paper demonstrates that the variance of the noise of differential pressure square root is approximately directly proportional to the flow rate of disperse phase with separated flow model of two phase flow under the assumption that the variance of disperse phase concentration stochastic distribution is proportional to it's mean phase concentration without considering disturbance of the obstruction. A theoritical model of two phase flow rate measurement using such noise is developed. The demonstration indicates that it may be possible to measure two phase flow rate based on the proposed simple theoretical model with a single throttle set.

    两相流流过节流装置时产生的差压测量噪音是人们熟知的现象。这一噪音是由于相浓度在空间的随机分布所引起的。当流动遇有阻挡体(例如孔板)造成扰动时,噪音的临度将进一步增强。假设分散相浓度分布的方差正比于其平均相浓度,在不考虑阻挡体扰动的条件下,应用两相流分离流理论模型论证了节流装置差压方根噪音的方差近似正比于分散相流量。进而推导出利用噪音测量两相流流量的理论模型。这一论证预示了可以根据简单的理论模型用单一节流装置实现两相流流量的测量。

     
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