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.

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.

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.

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.

Introduces a intelligent data acquistion system with 9 channels for flowrate measurement using MCS-51 single chip computer and LL-25 model rotz flowmeter.

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.

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.

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

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.

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.

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.