ULTRASONIC FLOWMETER

• Main Authors: SATOU, Masato, MIYOSHI, Asako, NAKABAYASHI, Yuuji, MATSUDA, Masataka
• Format: Patent
• Language: English; French; German
• Published: 09.02.2022
• Subjects: MEASURING; MEASURING QUANTITY OF HEAT; MEASURING TEMPERATURE; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; TESTING; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR

An ultrasonic flowmeter includes: a flow path body (1) having a flow path (2) through which a fluid to be measured flows; a pair of ultrasonic transducers disposed in the flow path body (1); a substrate (9) fixed to the flow path body (1); a sensor plate (8) on which a temperature sensor (11) for detecting a temperature of the fluid to be measured is disposed, the sensor plate being flat; and an arithmetic unit that calculates a flow rate of the fluid to be measured from a propagation time of ultrasonic waves between the pair of ultrasonic transducers and the temperature detected by the temperature sensor. The sensor plate (8) is configured to project from the substrate (9) and to project into a flow path cross-section of the flow path (2) from a sensor hole (10) provided in the flow path body (1) at a time of fixing the substrate (9) to the flow path body (1). With this configuration, it is possible to achieve an ultrasonic flowmeter that can significantly reduce the influence of ambient temperature of the flow path (2) to measure the fluid temperature with high accuracy and has high measurement accuracy.