Random number sampling method for electronic meter

Abstract

The invention discloses a random number sampling method for an electronic meter, and the method comprises the following steps: carrying out the collection of the flow of the meter at an initial sampling time interval t1, and obtaining the real-time flow Qs; judging whether the flow Qs is less than the starting flow of the table or not, if yes, indicating that the current instantaneous flow Q of the meter is equal to 0, and if not, indicating that the current instantaneous flow Q of the meter is equal to Qs; judging whether a gas-unused state exists or not according to the current instantaneousflow Q of the meter; if so, judging whether the duration of the gas-free state reaches preset cumulative time or not; if yes, performing flow collection every random sampling time interval t2 so thatthe current flow Qs is obtained, and the random sampling time interval t2 is a random value in a time interval [t1, t3], wherein t3 is the time interval larger than or equal to N * t1, and N is an integer larger than 1. The random number sampling method is used, the condition of short flow duration can be effectively detected, cumulant metering is carried out, the metering precision is improved and the operation power consumption of the meter can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of metering instruments, in particular to a random number sampling method for electronic metering meters. 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 into ultrasonic meters and thermal meters according to the metering mode, which measure the fluid velocity through electronic sensors, and then 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. However, the electronic meter has no mechanical parts. Only by continuously triggering the electronic sensor to collect the fluid velocity can th...

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Problems solved by technology

This method is divided into two modes of using gas and not using gas by identifying the user's usage. It only reduces the sampling frequency when not using gas. Although it will not affect the measurement error when using gas, it reduces the error when the user does not use gas. Sampling frequency, in the case of pulsating flow and short gas consumption time and high frequency, there will be problems that the instantaneous flow rate cannot be collected or the sampling calculation time is much less than the actual gas consumption time, resulting in a very large measurement error of the meter

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