ULTRASONIC FLOW RATE MEASURING DEVICE

• Main Author: IWANAGA SHIGERU
• Format: Patent
• Language: English
• Published: 29.07.2010
• Subjects: MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To enhance the measurement accuracy of flow rate or flow quantity, by measuring a travelling period with more high accuracy, through accurate detection of a reception waveform of normal travelling wave, while reducing unwanted traveling waves which leak in the case of a measurement flow path, without enhancing the pressure loss. SOLUTION: This device includes the measurement flow path; an ultrasonic wave transducer mounted at the measurement flow path; a second unwanted traveling wave attenuation means which attenuates unwanted traveling wave of the ultrasonic waves traveling the flow path wall which is forming the measurement flow path; a measurement control part which measures the traveling period of the ultrasonic waves among the ultrasonic wave transducer; an operation part which calculates the flow quantity based on the signal from the measurement control part, and a vibration transmission suppression means which is included in the second unwanted traveling wave attenuation means is mounted inside the flow path wall between the ultrasonic wave transducer of the flow measurement path, and thereby the transmission and reception of the ultrasonic waves can be attained at a high sensitivity and with superior S/N characteristics, and the traveling wave passing through the measurement path can be received with accuracy; and measurement accuracy of the flow rate or flow quantity can be enhanced. COPYRIGHT: (C)2010,JPO&INPIT