Research on Transit-time Ultrasonic Flowmeter with Signal Characteristic Analysis

2019 ◽  
Author(s):  
Bin Li ◽  
Jingyuan Xu ◽  
Jie Chen ◽  
Yang Gou ◽  
Zhigang Nie
Keyword(s):  
Transit Time ◽  
Ultrasonic Flowmeter ◽  
Characteristic Analysis ◽  
Signal Characteristic

A Fourier Collocation Approach for Transit-Time Ultrasonic Flowmeter Under Multi-Phase Flow Conditions

2017 ◽  
Vol 25 (04) ◽  
pp. 1750005 ◽  
Author(s):  
Matej Simurda ◽  
Benny Lassen ◽  
Lars Duggen ◽  
Nils T. Basse
Keyword(s):  
Transit Time ◽  
Ultrasonic Flowmeter ◽  
Flow Profile ◽  
Phase Flow ◽  
Flow Conditions ◽  
Perfectly Matched Layers ◽  
Acoustic Media ◽  
Multi Phase Flow ◽  
Multi Phase ◽  
Fourier Collocation

A numerical model for a clamp-on transit-time ultrasonic flowmeter (TTUF) under multi-phase flow conditions is presented. The method solves equations of linear elasticity for isotropic heterogeneous materials with background flow where acoustic media are modeled by setting shear modulus to zero. Spatial derivatives are calculated by a Fourier collocation method allowing the use of the fast Fourier transform (FFT) and time derivatives are approximated by a finite difference (FD) scheme. This approach is sometimes referred to as a pseudospectral time-domain method. Perfectly matched layers (PML) are used to avoid wave-wrapping and staggered grids are implemented to improve stability and efficiency. The method is verified against exact analytical solutions and the effect of the time-staggering and associated lowest number of points per minimum wavelengths value is discussed. The method is then employed to model a complete TTUF measurement setup to simulate the effect of a flow profile on the flowmeter accuracy and a study of an impact of inclusions in flowing media on received signals is carried out.

Transit Time Multipath Ultrasonic Flowmeter: An Issue on Acoustic Path Arrangement

2015 ◽  
Vol 771 ◽  
pp. 3-8
Author(s):  
Deddy Kurniadi
Keyword(s):  
Transit Time ◽  
Gas Flow ◽  
Ultrasonic Transducer ◽  
Ultrasonic Flowmeter ◽  
Flow Profile ◽  
Acoustic Path ◽  
Measurement Results ◽  
Ultrasonic Flow Meter ◽  
Flow Velocity Profile ◽  
Transit Time Measurement

The multipath ultrasonic flow meter using transit time measurement is being widely used for industrial gas flow measurement. Since the AGA report no. 9 has released, the application of this flowmeter in natural gas metering system has become a technical standard. Currently, the commerical multipath ultrasonic flowmeter employs parallel acoustic path arrangement which consists of four, five or six pairs of ultrasonic transducer. This paper discusses an issue on the acoustic path arrangement of multipath ultrasonic flowmeter in an asymmetric flow profile. From this study, the parallel path arrangement gives relatively inconsistent measurement results when the flow velocity profile was asymmetric.

scholarly journals Study of the influence of temperature on the measurement accuracy of transit-time ultrasonic flowmeters

Sensor Review ◽  
2019 ◽  
Vol 39 (2) ◽  
pp. 269-276 ◽  
Author(s):  
Liang Ge ◽  
Hongxia Deng ◽  
Qing Wang ◽  
Ze Hu ◽  
Junlan Li
Keyword(s):  
High Precision ◽  
Transit Time ◽  
Temperature Compensation ◽  
Flow Measurement ◽  
Measurement Accuracy ◽  
Influence Factors ◽  
Test System ◽  
Ultrasonic Flowmeter ◽  
Content Type ◽  
Influence Of Temperature

Purpose The purpose of this study is to deal largely with the influence of temperature variation on the measurement accuracy of transit-time ultrasonic flowmeter. Design/methodology/approach The causes of measurement error due to temperature are qualitatively and quantitatively analyzed, and a mathematical model is established. The experimental data are processed and analyzed, and the temperature compensation coefficient of flow measurement is obtained. Findings The experimental results show that the flow measurement results by temperature compensation are helpful in improving the measurement accuracy of the ultrasonic flowmeter. Practical implications This study has certain application value, which can provide theoretical support for the design of high-precision ultrasonic flowmeters and design guidance. Originality/value It is worth emphasizing that there are few research studies on the influence factors of temperature. This paper focuses on the influence of the temperature change on the flowmeter that is modeled, and the high precision flow parameter test system is designed based on the established model.

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