Research On Remote Monitoring And Early Warning System For Water Supply Network Valve In Park

In recent decades,the total amount of water resources has gradually declined,and the per capita water supply is seriously inadequate.Therefore,it is an urgent task to improve the utilization rate of water resources and reduce the waste of fresh water resources.The survey shows that underground water leakage accounts for about 50%-60% of the total water loss,which naturally is one of the main reasons for a large amount of water loss.Thus,pipeline leak monitoring has attracted a lot of attention and research,but most of the previous research used a single detection method,causing a few inaccurate results like false negative,false positives and so on.In order to solve this problem,this paper focuses on the use of multi-sensor information fusion technology in pipeline monitoring system and mainly completed the following work:(1)Study the common pipe network monitoring technology,and take the pipe network valve as monitoring nodes to build a distributed system framework.As well as,adopt a variety of detection methods to monitor the sound,negative pressure waves,humidity and other signals of valve nodes.Wavelet transform and periodogram method was carried out on the original signal to process and feature extraction,such as filter and power spectrum.(2)Study the multi-source information fusion technology and adopt the multisource information fusion algorithm based on the D-S evidence theory to make the decision-level fusion of various kinds of prejudged result.The experimental results show that the application of D-S evidence theory can improve the accuracy and comprehensiveness of the monitoring system by improving the false detection and missed detection of single detection method.(3)Adopt B/S architecture design and the more mature SSH2 development framework to provide services for users,and develop the detailed design of hardware and software of monitoring system terminal and remote system to achieve the park pipe network remote monitoring and early warning function.The monitoring system of this project has realized the convenient efficient and accurate monitoring for valve in the park without unavailable water supply.It is able to detect the position of fault valve and send warn to staff,and thus has a high reference value and practicality.