scholarly journals Development of Sophisticated High-Accuracy Ultrasonic Velocity-Profile Elowmeter.

2004 ◽  
Vol 124 (2) ◽  
pp. 102-105
Author(s):  
MICHITSUGU MORI
Keyword(s):  
Velocity Profile ◽  
Ultrasonic Velocity ◽  
High Accuracy

Development of Pulse Ultrasonic Doppler Method for Flow Rate Measurements of Power Plant: Characteristics of Sound Pressure Distributions and Evaluation of the Hybrid Ultrasonic Flowmetering System Using TOF and UDM

2006 ◽  
Author(s):  
Hiroshige Kikura ◽  
Yuto Inoue ◽  
Masanori Aritomi ◽  
Michitsugu Mori
Keyword(s):  
Velocity Profile ◽  
Ultrasonic Velocity ◽  
Flow Rate ◽  
Time Of Flight ◽  
Velocity Profiles ◽  
Instantaneous Velocity ◽  
Rate Measurement ◽  
Flow Rate Measurement ◽  
Doppler Method ◽  
Flow Metering

A multi-beam pulse ultrasonic Doppler method has been developed for a new type of flow metering system. This new system is a hybrid of the time-of-flight type ultrasonic flowmeter and the ultrasonic velocity profile type flowmeter, having the advantages of these two types. Our final purpose is to apply the hybrid ultrasonic flow metering system to an accurate flow rate measurement of feed- or recirculation- water in nuclear power plants. The pulse ultrasonic Doppler method (UDM) has the capability to obtain instantaneous velocity profiles along an ultrasonic beam. The principle of the UDM flowmeter, which is one of the ultrasonic velocity profile type flowmeters, is based on the integration of an instantaneous velocity profile over a pipe diameter. The multi-beam system is expected to eliminate installation problems such as those of entry length, and also to follow transient flow rate more precisely by increasing the number of ultrasonic transducers. However, it needs reflectors for receiving ultrasonic Doppler signals. On the other hand, the time-of-flight (TOF) ultrasonic flow metering system does not need any reflector, but it needs profile factors (PFs) which depend on velocity profiles. PF is one of the important experimental coefficients for the accurate flow rate measurement. Therefore PFs must be corrected according to the changes in flow conditions. In the present study, we investigated to what degree the hybrid ultrasonic flow metering system can adjust the profile factors of the time-of-flight ultrasonic flow meters by using the multi-beam pulse ultrasonic Doppler method in metallic wall piping.

A Study of Phased Array Ultrasonic Velocity Profile Monitor for Flow Rate Measurement

2013 ◽  
Author(s):  
Takuya Fukumoto ◽  
Keisuke Tsukada ◽  
Tomonori Ihara ◽  
Nobuyoshi Tsuzuki ◽  
Hiroshige Kikura
Keyword(s):  
Velocity Profile ◽  
Ultrasonic Velocity ◽  
Flow Rate ◽  
Measurement System ◽  
Phased Array ◽  
Profile Measurement ◽  
Multiple Reflections ◽  
Horizontal Pipe ◽  
Array Sensor ◽  
Velocity Profile Measurement

A new ultrasonic velocity profile measurement system with a phased array sensor was developed for accurate flow rate measurements. This measurement system employs phased array technique to reduce noise from multiple reflections which occurs in a wedge. However, phased array technique has some difficulties — one of them is about grading lobes. Thus, the array sensor was designed to reduce the grading lobes using simple calculations. Performance of the manufactured array sensor was evaluated by experimental measurements of sound pressure distribution emitted from the array sensor, and optimal parameters to control the array sensor were obtained. Hardware and software of the ultrasonic velocity profile measurement system with a phased array sensor were also developed. The software is based on ultrasonic Doppler method. Velocity profiles of horizontal pipe flow were measured using the developed system, and the availability of the system applying a phased array sensor was confirmed.

C213 A Study of Phased Array Ultrasonic Velocity Profile Method for Flow Rate Measurement

2013 ◽  
Vol 2013.18 (0) ◽  
pp. 311-314
Author(s):  
Takuya FUKUMOTO ◽  
Keisuke TSUKADA ◽  
Tomonori IHARA ◽  
Nobuyoshi TSUZUKI ◽  
Hiroshige KIKURA
Keyword(s):  
Velocity Profile ◽  
Ultrasonic Velocity ◽  
Flow Rate ◽  
Phased Array ◽  
Rate Measurement ◽  
Flow Rate Measurement ◽  
Profile Method

scholarly journals Creation of Pulse Method for Measurement of Ultrasonic Velocity with High Accuracy

2021 ◽  
Vol 19 (2) ◽  
pp. 13
Author(s):  
V V Muravyov ◽  
D V Zlobin ◽  
T I Zemskov ◽  
G V Bezruchenkov ◽  
V V Syaktereva
Keyword(s):  
Ultrasonic Velocity ◽  
Pulse Method ◽  
High Accuracy

В статье обсуждаются способы высокоточного определения скорости ультразвука в твердых материалах. Описана методика проведения точных измерений временных интервалов ультразвуковых импульсов, приведена блок-схема экспериментальной установки. Установка построена на широкодоступных компонентах, возможна ее простая модернизация. Предложено использование датчика на основе сегнетоэлектрического полимера поливинилиденфторида в качестве источника излучения и приема продольных волн. В качестве объектов контроля используются концевые меры длины и ступенчатый образец из стали, изготовленный с использованием плоскошлифовального станка. Представлены результаты определения скорости, подтвержденные многократными измерениями на ступенчатом объекте с разницей по толщине ступеней 10 мкм. Проведен эксперимент при изменяемой температуре образцов концевых мер длины, подтверждающий точность измерений и разницу в рассчитанной скорости, свидетельствующий о разном структурном составе объектов. Определен химический состав образцов концевых мер длины с использованием рентгено-флуоресцентного анализатора. Представлен график зависимости плотности объектов от скорости ультразвука. Описаны погрешности измерений, способы их расчета, в частности временная задержка при использовании пленочного датчика. Абсолютная погрешность определения скорости ультразвуковых продольных волн не превышает 2 м/с, что позволяет фиксировать крайне малые отклонения скорости ультразвука в образцах.

scholarly journals 21008 Flow rate measurements in circular pipe using an ultrasonic velocity profile flow meter

2008 ◽  
Vol 2008.14 (0) ◽  
pp. 237-238
Author(s):  
Sho HAMADA ◽  
Kensuke USUI ◽  
Hiroshige KIKURA ◽  
Masanori ARITOMI ◽  
Kenichi Tezuka ◽  
...  
Keyword(s):  
Velocity Profile ◽  
Ultrasonic Velocity ◽  
Flow Rate ◽  
Circular Pipe ◽  
Flow Meter ◽  
Profile Flow
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