A data detection method of a gas flowmeter
A gas flow meter, gas flow technology, applied in electrical digital data processing, special data processing applications, calculations, etc., can solve problems such as non-negligible error, large delay, inability to handle data fluctuations and changes, and achieve high sensitivity and stable data. , good stability
Active Publication Date: 2017-09-12
NINGBO UNIV
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Problems solved by technology
For the fluctuations in the data due to accidental factors or the pulse interference caused by environmental noise, the limiting filtering method and the median filtering method are both effective processing algorithms, but these two methods cannot deal with the normal fluctuations of the data.
For the moving average filtering method, it can respond to the fluctuation of the data, but the delay will be very large, and at the same time, it cannot identify the pulse interference caused by the fluctuation or sampling instability in the data due to accidental factors.
The weighted moving average filtering method, although the sensitivity and stability are greatly improved compared with the above algorithm, but because the abnormal data that may appear in the normal fluctuation of the data normal rise and fall has not been processed, the weighting coefficient is not easy to set, especially When the abnormal data deviates greatly from the normal data, the weighting effect is negligible, and the resulting error cannot be ignored
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[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0023] This embodiment provides a data detection method of a gas flow meter, which divides the state of the gas flow in the pipeline into a horizontal steady state and a jump state, extracts the data collected by the gas flow meter, and takes N+1 data as A group, let D i is the data collected by the gas flow meter at time i, and D i is the data being processed at the current moment, D i+N is the data collected by the gas flow meter at time i+N, X i It is the output data after processing at the current moment, see figure 2 shown;
[0024] The preset gas flow change threshold ξ, the cumulative number of preset horizontal steady state q=0, the preset jump state data number j=0, the cumulative maximum value Q of the preset horizontal steady state, the preset parameter k, and k
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The invention relates to a data detection method of a gas flow meter, which is characterized in that: the state of the gas flow in a pipeline is divided into a horizontal steady state and a jump state, and then the data of the horizontal steady state and the jump state are respectively processed. Compared with the prior art, the present invention has the advantages of being able to effectively identify abnormal data in the data collected by the gas flow meter, and when the data collected by the gas flow meter changes, the method of the present invention can follow up in time and perform smoothing , when the data collected by the gas flow meter oscillates up and down at a fixed point, the method of the invention can make the data tend to be stable, and make the processed output data stable, high in sensitivity and small in error.
Description
technical field [0001] The invention relates to a data detection method of a gas flow meter. Background technique [0002] For outdoor small-capacity battery-powered ultrasonic gas flowmeters, the power consumption is mainly in data generation and collection, so the traditional non-real-time monitoring and large-sample capacity estimation methods cannot be used to process abnormal data due to interference. [0003] Due to the compressibility and viscosity of the gas, the surface roughness of the inner wall of the pipe, the cross-sectional shape of the pipe and other factors. The gas flow data presents the following two characteristics: on the one hand, when the gas passes through the pipeline at a certain flow rate, the gas flow data detected by the instrument under normal conditions fluctuates normally within a certain range of the actual flow; on the other hand, due to the above-mentioned Characteristics, so that the gas flow rate in the pipeline can not appear a step cha...
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IPC IPC(8): G06F19/00
Inventor 孙河山杨鸣鲁法利巢琳蔡清海杨中伟
Owner NINGBO UNIV