The Design And Implementation Of Elevator Remote Monitoring System Based On3G

With the rapidly development of wireless communication and digital video technology.Based on the wireless network elevator video surveillance has become an important directionof development of the modern elevator monitoring industry. This paper aims to design anelevator running state monitoring system, which able to obtain real-time information insidethe elevator running state information and elevator malfunction information, and the real-timevideo information of elevator.This thesis and designed a set of elevator remote monitoring system based on3Gnetwork, and focuses on two issues: the use of3G networks transmit real-time videostreaming QoS issues and elevator monitoring system, anti-jamming, and verify thesystemgiven test data. This thesis were monitoring the situation and development direction ofdomestic and foreign elevator, described the background and significance of the remoteelevator monitoring system based on3G network, the development of key technologies insystem design, these key technologies the main problems, followed by a meticulousdescription of the problems faced by the communication terminal, two-pronged approach tothe issue of electromagnetic interference in the3G network transmission of video data in realtime QoS issues and elevator monitoring system. Then through the analysis of real-time videostreaming features, parameters, the system suitable for real-time video transmission protocolis selected, the next QoS problems of the real-time video data and detailed analysis on the useof the3G network transmission, from congestion control and error recovery a proposed twoalgorithms: adaptive rate adjustment algorithm and self-adjusting forward error correctionalgorithms, and gives experimental verification data. Finally, the design of systeminterference. Start from interference-building mathematical models to analyze common modeinterference and differential mode produces a filter designed according to the characteristicsof the interference signals, and filter detailed analysis, and given the key device parameters toselect the authentication method, and finally the first filter performance, and communicationterminals for experimental verification, and gives the test results. Experimatation indicates that the Elevator elevator remote monitoring system based onthe3G of Hitachi elevator has excellent performance, and meets the goal of design.