Oscillating flow filtering method for electronic meter at zero flow point

Abstract

The invention discloses an oscillating flow filtering method for an electronic meter at a zero flow point, which comprises the following steps: every initial sampling time interval t 1 Collect the flow of the meter once to get the real-time flow Q s ; Judgment flow Q s Whether it is less than the starting flow rate of the meter, if so, the current instantaneous flow rate of the meter is Q=0, otherwise, the current instantaneous flow rate of the meter is Q=Q s ;Record the current instantaneous flow Q of the meter and the flow Q obtained by sampling N times before Q 1 , Q 2 ,...,Q N direction, where N is an integer greater than or equal to 2; judge whether the absolute value of the current instantaneous flow Q is less than the preset flow threshold, and if the absolute value of the current instantaneous flow Q is less than the preset flow threshold, perform zero-flow oscillating flow filtering. The invention can effectively filter out the oscillating flow near zero flow, reduce the economic losses brought by the zero-flow oscillating flow to users, and meanwhile have no influence on normal flow and meter functions.

Description

technical field [0001] The invention relates to the technical field of metering instruments, in particular to an oscillating flow filtering method for an electronic meter at a zero flow point. Background technique [0002] With the advancement of science and technology, the electronic metering technology of energy has developed rapidly, and electronic meters have gained a good reputation in the meter industry. Electronic meters, including water meters, gas meters, etc., are mainly classified according to the measurement mode as ultrasonic meters and thermal meters, which measure fluid velocity through electronic sensors and convert it into flow through calculation. Compared with the traditional model meter, the electronic meter has the advantages of good repeatability, small pressure loss, long life, high precision, small size and no noise. [0003] The electronic meter performs well in small flow measurement, and can accurately measure the flow value below the starting flo...

AI Technical Summary

Problems solved by technology

Since the amplitude of most of the actual oscillating flow is much higher than the starting flow of the meter, and the larger the oscillating flow is, the more cumulative quantity will be generated in the same time. Therefore, in the flow measured by the cumulative quantity generated, these The oscillating flow with a larger oscillating amplitude has a larger proportion. The method of increasing the threshold of the starting flow will not only lose the advantages of the flow electronic meter in small flow measurement, but also cannot achieve the desired effect.

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