Increasing the Accuracy of Sound Velocity Measurement in a Vector Single-Beam Acoustic Current Velocity Meter

TL;DR

This paper presents a new measurement method that enhances the accuracy of sound velocity determination in acoustic current meters by accounting for hardware delays and measuring flow velocity and temperature simultaneously.

Contribution

A novel measurement technique that improves sound velocity accuracy in acoustic flow meters by compensating for hardware delays and measuring multiple parameters concurrently.

Findings

Increased measurement accuracy of sound velocity in flow meters.

Effective compensation for hardware delays and base length changes.

Simultaneous measurement of flow velocity and temperature.

Abstract

Acoustic flow velocity and direction meters from the IST series, which can be integrated into various measuring systems, are considered. The simulation of the flow profile in the measuring tube was carried out depending on the free flow velocity. A measurement method has been developed that uses the transit time of repeated acoustic signals reflected from the transducers, which makes it possible to take into account time hardware delays and a change in the length of the measuring base, which affect the determination of the speed of sound and flow, while increasing the accuracy of measuring the sound speed parameters with simultaneous measuring the flow velocity and temperatures for liquid media of different densities.