Gas early warning method and system based on concentration amplification

Abstract

The invention provides a gas early warning method based on concentration amplification. The gas early warning method comprises the following steps that the amplification of gas concentration in a period is calculated, and whether the gas period amplification exceeds an early warning threshold value or not is determined according to the gas concentration; the closer the gas concentration is to a concentration threshold value, the smaller the early warning threshold value of the gas period amplification is; and the increase of the gas concentration relative to the average value of the gas concentration in a period of time is calculated, whether the increase of the average value of gas exceeds the early warning threshold value or not is determined according to the real-time concentration of the gas, and the higher the real-time concentration of the gas is, the smaller the early warning threshold value of the increase of the average value of the gas is. The invention further provides a gas early warning system based on the concentration amplification. The gas early warning method and system based on the concentration amplification has the advantages that a gas concentration amplification value is monitored and early warned, the early warning rule is dynamically set according to the gas concentration, risk early warning is carried out from the two aspects of the periodic change condition of the gas concentration and the change condition of the relative average value, and the scientificity and integrity of gas risk early warning are improved.

Description

technical field [0001] The invention relates to the technical field of gas monitoring, in particular to a gas early warning method and system based on concentration increase. Background technique [0002] For coal mine gas monitoring, the mine already has a digital safety monitoring system with relatively complete functions. At present, the abnormal detection of the time series data generated by it mostly adopts the monitoring method based on the upper and lower limits. By setting the upper and lower limits of the time series data, abnormalities that conform to the rules are monitored. data, for early warning and alarm. But the disadvantage of this method is that it cannot reflect the changing trend of time series data. The allowable increase degree when the gas concentration is low is not the same as the allowable increase degree when the gas concentration is close to the alarm value; when the gas concentration is low but shows a rapid increase trend, high attention should...

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Problems solved by technology

[0003] The invention patent application with the publication number CN103244186A discloses an identification and tracking early warning system based on the development process of coal and gas outburst. Abnormal, but does not consider the difference in the early warning standards of different increases in different concentrations, can only provide a fixed increase in the early warning method, can not meet the needs of safe production

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