Design And Implementation Of Key Mechanism Of Instant Messaging Client In Intelligent Inspection

In recent years,with the rapid development of information technology,the application of information technology to urban underground pipe gallery has gradually become a new focus of attention.Based on the existing smart pipe rack system architecture,this thesis designs and implements the functions of instant messaging,video conference and data push of client.At the same time,in order to deal with the unstable network environment and limited available resources,this thesis proposes a key mechanism design and implementation method of instant messaging client in intelligent inspection from three aspects:heartbeat mechanism,mobile trajectory tracking mechanism and message synchronization mechanism.The main work is as follows:1.Aiming at the problem of limited available resources in patrol inspection,an adaptive heartbeat detection mechanism is proposed.According to the characteristics of patrol work,this scheme adopts the method of combining patrol location information with heartbeat detection,and adopts different schemes to calculate heartbeat interval adaptively in different working states.Theoretical analysis and test results show that the proposed scheme reduces the number of heartbeat packets per unit time,saves resources and enhances the endurance of patrol terminal applications.2.In order to improve the processing speed of positioning data,an improved online trajectory compression algorithm based on bopw algorithm is proposed.The algorithm takes the maximum offset points on both sides of the track in the window as the benchmark,and keeps the key points to achieve compression.Theoretical analysis and experimental results show that,compared with the existing online trajectory compression methods,the algorithm has better track shape retention effect and faster real-time compression speed.Combined with the scene of smart pipe gallery,a mobile trajectory tracking mechanism is proposed,including positioning data acquisition,compression,transmission and trajectory drawing.3.Aiming at the problem that the receiving side is insensitive to messages and easy to lose messages,a message synchronization mechanism combining push and pull is designed.On the basis of symmetric websocket connection,the message transmission mechanism is improved.The mode of one-to-one correspondence between sending and receiving is changed into multiple sending and one receiving,and the message checking ability of message receiving side is increased.Theoretical analysis and test results show that the proposed scheme can reduce the rate of information loss and repetition of information reception,and improve the reliability of the inspection instant messaging function under the condition of unstable network.4.On the basis of the intelligent pipe rack system architecture,a client for inspection personnel is designed and implemented,which has the functions of instant communication,emergency command and data push.It optimizes the inspection workflow and expands the system capability,which has reference significance for the development of intelligent inspection system.