A method of improving the precision of overcurrent alarm of intelligent gas meter

Abstract

The invention discloses a method for improving the accuracy of an intelligent gas meter's overcurrent alarm, which includes the following steps: S1, setting the gas volume equivalent V corresponding to the preset unit pulse signal and the preset abnormal time interval T 设 , the gas volume equivalent V and the preset abnormal time interval T 设 The ratio is set to the preset cut-off flow q 设 ; S2, adjust the actual abnormal time interval T 实 The accuracy of the actual abnormal time interval T 实 Obtained by the following formula, n is greater than or equal to 1, and the gas volume equivalent V and the actual abnormal time interval T 实 The ratio is set as the actual cut-off flow q 实 ; S3, calculate the actual cut-off flow q 实 Cut flow q with preset 设 The relative error, and cut off the flow q according to the actual 实 Cut flow q with preset 设 The relative error determines the actual anomaly time interval T 实 accuracy. The invention can achieve the purpose of reducing the relative error between the actual cut-off flow rate and the preset flow rate and improving the user's experience of using gas.

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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