Keywords: gas pipeline leakage detection system localisation algorithm infrasound source generalised cross-correlation method embedded microprocessor. As revealed from the experimental results, the detection system exhibits high location accuracy. Lastly, a simulation experiment of leakage location is performed in the laboratory. A gas pipeline leakage detection system is developed using low-power WAN technology and embedded microprocessor to implement this localisation algorithm. Next, the location of the leakage point is calculated using the built location model of leakage source. Subsequently, the generalised cross-correlation method is proposed to determine the delay between adjacent sensor nodes. First, wavelet transform is adopted to denoise the infrasound signal that is collected from gas pipeline leakage by the sensor array. An infrasound source localisation algorithm for improving location accuracy of gas pipeline leakage detection systemĪbstract: To solve inaccurate location for urban gas pipeline leakage, an optimised algorithm based on infrasound source location is developed in this study.Keywords: emergency information extraction event track scenario response. Experimental results show the proposed method can achieve high precision and recall, and the visualisation of the tracking extraction results can display the dynamic evolution process better, which is very helpful to scientific decision-making in emergency management.
Based on the emergency tracking, it firstly judges the type of the emergency secondly it extracts time, location, casualty and loss based on multiple strategies finally it adopts E-charts to visualise the extraction results. To this end, a method for information extraction based on event tracking (called information tracking extraction) for emergency scenario response is proposed. On the other hand, some emergency-related information evolves dynamically with time going on. On the one hand, extracting emergency-related information is necessary and important for describing emergency scenario correctly.
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