Minimizing the Zero-Flow Error in Transit-Time Ultrasonic Flow Meters
conference paper
Transit-time ultrasonic flow meters are based on the fundamental idea that the flow is the only non-reciprocal effect between an upstream and downstream measurement. Non-identical transducers can be used in a reciprocal manner if the circuit is made reciprocal. In this paper we analyze the effect of driver- and readout electronics on the zero-flow error in transit-time ultrasonic flow meters by simulation and measurement. Using the frequency characteristic of two nonidentical transducers, the cause of the zero-flow error in nonreciprocal circuits is evaluated. Both simulation and measurement results show that the lowest zero-flow error can be obtained by using circuits that have an impedance significantly higher or lower than the impedance of the transducers. © 2018 IEEE.
Topics
TNO Identifier
861888
ISSN
19485719
ISBN
9781538634257
Publisher
IEEE Computer Society
Article nr.
8579771
Source title
IEEE International Ultrasonics Symposium, IUS, 2018 IEEE International Ultrasonics Symposium, IUS 2018, 22 October 2018 through 25 October 2018
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