Lightweight Transit-time Ultrasonic Flow Measurement System using Relative Flow Difference Calculation Method

This study proposes a lightweight signal processing architecture that reduces the number of signal samplings and calculations to reduce the weight of the flow measurement system using ultrasonic signals. The proposed architecture is a flow measurement method using unidirectional sampling rather than bidirectional sampling to minimize ADC operation in a flow measurement system using bidirectional ultrasonic signals, and is intended to reduce the amount of computation in the time domain by applying a window to the signal for flow measurement. In order to minimize the amount of calculation, the flow measurement architecture is implemented using only specific parts of the ultrasonic signal rather than the entire ultrasonic signal. The proposed architecture is applied to ultrasonic signals obtained from an actual flow measurement system to confirm its operation and analyze its accuracy. As a result, it is analyzed that the measurement accuracy is still within the error range of the meter even though the number of sampling is reduced and the amount of calculation is reduced.