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1. WO2017168480 - FLOW RATE MEASUREMENT DEVICE

Publication Number WO/2017/168480
Publication Date 05.10.2017
International Application No. PCT/JP2016/005142
International Filing Date 15.12.2016
IPC
G01F 1/66 2006.1
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
66by measuring frequency, phase shift, or propagation time of electromagnetic or other waves, e.g. ultrasonic flowmeters
CPC
G01F 1/667
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
66by measuring frequency, phaseshift, or propagation time of electromagnetic or other waves, e.g. ultrasonic flowmeters
667Schematic arrangements of transducers of ultrasonic flowmeters; Circuits therefor
G01R 19/175
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
19Arrangements for measuring currents or voltages or for indicating presence or sign thereof
175Indicating the instants of passage of current or voltage through a given value, e.g. passage through zero
G05F 1/46
GPHYSICS
05CONTROLLING; REGULATING
FSYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
1Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
10Regulating voltage or current
46wherein the variable actually regulated by the final control device is dc
H03K 5/24
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
5Manipulating of pulses not covered by one of the other main groups of this subclass
22Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
24the characteristic being amplitude
Applicants
  • パナソニックIPマネジメント株式会社 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. [JP]/[JP]
Inventors
  • 塩田 和希 SHIOTA, Kazuki
  • 安田 憲司 YASUDA, Kenji
  • 岩本 龍志 IWAMOTO, Ryuji
  • 藤井 裕史 FUJII, Yuji
  • 木場 康雄 KOBA, Yasuo
Agents
  • 鎌田 健司 KAMATA, Kenji
  • 前田 浩夫 MAEDA, Hiroo
Priority Data
2016-06533829.03.2016JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) FLOW RATE MEASUREMENT DEVICE
(FR) DISPOSITIF DE MESURE DE DÉBIT
(JA) 流量計測装置
Abstract
(EN) In the present invention, flow rate measurement is carried out according to a propagation time using a pair of ultrasonic transducers (2, 3) that are disposed in a flow path (1) through which a fluid to be measured flows and are disposed so as to send and receive an ultrasonic signal that is made to be reflected by the inner wall of the flow path (1) at least once. Further, an amplification factor is regularly adjusted by an amplification unit (7) that amplifies the reception signal of the ultrasonic transducers (2, 3) to an amplitude. If the previous and current amplification factors vary by a prescribed value or greater and an instantaneous flow rate calculated by a flow rate calculation unit (12) is less than or equal to a prescribed flow rate, a reference voltage setting unit (9) adjusts a reference voltage. As a result of this configuration, it is possible to stably measure a propagation time and prevent measurement accuracy deterioration.
(FR) Dans la présente invention, une mesure de débit est effectuée selon un temps de propagation à l’aide d’une paire de transducteurs à ultrasons (2, 3) qui sont disposés dans un trajet d’écoulement (1) parcouru par un fluide à mesurer et qui sont disposés de façon à envoyer et à recevoir un signal à ultrasons qui est amené à être réfléchi par la paroi intérieure du trajet d’écoulement (1), au moins une fois. De plus, un facteur d’amplification est réglé régulièrement par une unité d’amplification (7) qui amplifie le signal de réception des transducteurs à ultrasons (2, 3) pour lui donner une certaine amplitude. Si les facteurs d’amplification précédents et actuels varient d’une valeur égale ou supérieure à une valeur prescrite et qu’un débit instantané calculé par une unité de calcul de débit (12) est inférieur ou égal à un débit prescrit, une unité de réglage de tension de référence (9) règle une tension de référence. Grâce à cette configuration, il est possible de mesurer de façon stable un temps de propagation et de prévenir la détérioration de la précision de mesure.
(JA) 被測定流体が流れる流路(1)に設けられ流路(1)の内壁に少なくとも1回反射させて超音波信号を送受信するように配置された一対の超音波振動子(2、3)を用いて伝播時間で流量計測を行う。また、超音波振動子(2、3)の受信信号を振幅まで増幅する増幅部7により定期的に増幅率の調整を行い、前回と今回の増幅率が所定値以上変化し、且つ、流量演算部(12)で演算された瞬時流量が所定流量以下の場合、基準電圧設定部(9)で基準電圧を調整する。この構成により、安定して伝播時間が計測でき、計測精度の悪化を防ぐ。
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