An ultrasonic fluid metering
accuracy improvement method, comprising: exciting a first ultrasonic
transducer by means of an excitation wave sequence and enabling a second ultrasonic
transducer to operate, acquiring a received
digital signal corresponding to the excitation wave sequence, and calculating a
signal-to-
noise ratio of the received
digital signal, wherein the excitation wave sequence is a combination of a main wave and a self-damping wave, and the
signal-to-
noise ratio is a ratio of a peak-to-
peak value of a received
signal region to a peak-to-
peak value of a
noise region (S301); determining whether the signal-to-noise ratio is greater than a signal-to-noise ratio threshold, if not, adjusting an occupation time of high and low levels of the self-damping wave, and performing an excitation operation again on the basis of the adjusted excitation wave sequence until an actual signal-to-noise ratio is greater than the signal-to-noise ratio threshold (S302); and determining the excitation wave sequence corresponding to the actual signal-to-noise ratio being greater than the signal-to-noise ratio threshold as a target excitation wave sequence, and on the basis of the target excitation wave sequence, exciting the ultrasonic
transducer to operate to perform a metering operation (S303), thereby significantly improving metering accuracy without increasing hardware costs. Also provided are an ultrasonic fluid metering apparatus, an electronic device, and a non-transitory
machine-readable medium storing computer instructions.