A reliability-based framework for comparing ultrasonic flowmeter calibration methods

Ultrasonic flowmeters stand as sophisticated instruments employed for the precise measurement of fluid flow, utilizing cutting-edge time-of-flight technique. However, the optimal functioning of these devices is susceptible to the influence of various factors, including fluid properties and installation conditions, thereby introducing uncertainties into the measurement process. This research introduces a significant method based in structural reliability theory for comparing experimental conditions of ultrasonic flowmeters. This approach strives to offer a thorough comprehension of the factors that affect measurement reliability, actively contributing to the continuous endeavors aimed at fine-tuning the accuracy of ultrasonic flowmeters. To validate the effectiveness of the proposed method, it is applied and tested using data derived from measurements of an ultrasonic liquid flowmeter conducted by INMETRO. These results are subsequently compared against the metrological requirements outlined in OIML R 117. The results not only affirm the applicability of the proposed approach but also demonstrate its effectiveness in handling the uncertainties linked to fluid flow measurements. By enhancing the reliability of these devices, the proposed approach paves the way for advancements in the field, fostering greater precision and confidence in fluid flow measurements for various industrial applications.