Method for improving over-current alarm precision of intelligent gas meter

Abstract

The invention discloses a method for improving the over-current alarm precision of an intelligent gas meter, and the method comprises the following steps: S1, setting a gas volume equivalent V corresponding to a preset unit pulse signal and a preset abnormal time interval T < set >, and setting the ratio of the gas volume equivalent V to the preset abnormal time interval T < set > as a preset cut-off flow q < set >; S2, adjusting the precision of the actual abnormal time interval T < real >, calculating the actual abnormal time interval T < real > through the following formula, n being largerthan or equal to 1, and setting the ratio of the gas volume equivalent V to the actual abnormal time interval T < real > as the actual cut-off flow q < real >; and S3, calculating a relative error setby the actual cut-off flow q < real > and the preset cut-off flow q, and determining the precision of the actual abnormal time interval T < real > according to the relative error set by the actual cut-off flow q < real > and the preset cut-off flow q < real >. According to the invention, the relative error between the actual cut-off flow and the preset flow is small, and the gas use experience ofa user is improved.

Description

technical field [0001] The invention relates to the technical field of gas safety, in particular to a method for improving the precision of an intelligent gas meter's overcurrent alarm. Background technique [0002] In recent years, gas cultivation has become one of the main energy sources, and the society is building a modern gas industry system with reasonable structure, coordinated supply and demand, and safety and reliability. The application of gas in urban households and hotels is becoming more and more common. When gas is used, due to improper use or quality problems of gas accessories, gas leakage occurs from time to time. If the gas source is not found and cut off in time, it will cause serious disasters such as gas poisoning, explosion and fire. In order to prevent the occurrence of the above-mentioned accidents, the existing smart gas meter has an overcurrent alarm function. The smart gas meter is equipped with a pulse module and a controller module. The pulse mo...

AI Technical Summary

Problems solved by technology

When using gas, due to improper use or quality problems of gas accessories, gas leakage occurs from time to time. If the gas source is not found and cut off in time, it will cause serious disasters such as gas poisoning, explosion and fire.

In order to prevent the occurrence of the above-mentioned accidents, the existing smart gas meter has an overcurrent alarm function. The smart gas meter is equipped with a pulse module and a controller module. The pulse module outputs a pulse signal according to the volume data of the incoming gas, and the controller module receives the pulse signal. And record the time interval between the preset number of pulse signals, the accuracy of the preset abnormal gas flow time interval is an integer, but the relative error between adjacent time intervals is large, the actual cut-off flow and the preset flow The relative error between them is large. When the actual gas flow time interval is close to the preset abnormal gas flow time interval, the valve control module may shut off the gas. Therefore, the existing smart gas meter is monitoring the gas When shutting down, it has the problem of shutting off the gas in advance and affecting the user's gas experience

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