1、翻译部分英语原文A Study on the Remote Monitoring System of Hydraulic Support Based on 3DVRYan Haifeng, Su Fengxiang,Cheng Zhihong ,Du ChanglongThe school of Mechanical and Electrical Engineering China University of Mining andTechnology XuZhou JiangSuAbstractThe framework of hydraulic support remote monitori
2、ng system for fully-mechanized coalface is investigated in this paper. The three-dimensional virtualreality technology (3DVR) is applied to the control of hydraulic support and the OPC (OLE for process control) communication technology) is used to obtain the important sensing data of hydraulic suppo
3、rt,meanwhile, by using dynamics analysis and rapid solution based on intelligent algorithm, the virtual prototyping modeling of hydraulic support is driven. As a result, the hydraulic support working conditions reappeared synchronously and truly, the hydraulic support working process is remotely con
4、trolled.1. IntroductionHydraulic support is the main equipment of mechanized mining. Its function is not only to support the roof, maintain the space for safe operation, but also shift face conveyor and coal cutter. Therefore,monitoring the hydraulic working conditions andperformance to improve the
5、support reliability is one of the key factors for the mechanized mining successfully.However, coal production environment of mechanized mining face is very bad and the force of the hydraulic support is unusually complicated. Currently, the site pressure monitoring is often used under a heavy working
6、 load and in a severe environment, but the quality of remote video monitoring image is much poor.General remote monitoring system uses plane interface so that site conditions cannot be fully reflected. Using the combination of virtual reality visualization with automatic remote monitoring can make c
7、ontrol personnel to have a sense of immersive and thus they may judge accurately so that potential accidents will be eliminated and mine safety production and management will be promoted. This kind of technology can also be used to train miners who will be personally on the scene to experience and l
8、earn taking effective emergency measures to deal with dangerous situations in order to enhance the quality of personnel 1.2. System FrameworkThe system structure consists of four layers, from the bottom to top as follows: device layer, local control layer, network communication layer and HCI (humanc
9、omputer interaction) layer (Figure 1).2.1. Device LayerDevice layer, the final implementation part of the system, is at the bottom of the whole system. It is responsible for action implementation and data collection, mainly formed with hydraulic support, electro-hydraulic valve group and various typ
10、es of sensors. Take two-leg shield support as an example, electro-hydraulic valve group includes 5 to 8 three position four-way electro-hydraulic valve to control legs, balanced jack, forepoling jack, spalling-rib protection jack, side protection jack, push slip jack and bottom lift jack. The sensor
11、s mainly collect the following data: legs pressures, balanced jack pressures, push conveyor jack displacement, balanced jack displacement etc.2.2. Local Control LayerLocal control layer, the key control layer of the system, controls the devices on the device layer and processes collected data mainly
12、 through deciding programs. The local PLC controller, made by the highperformance large-scale PLC (such as the S7-400) and 913 related modules, is placed along the tank. As the master (controllers located on every hydraulic support) viadata Profibus for the coordination among hydraulic supports, bet
13、ween the hydraulic support and coal cutter, the hydraulic supports and the scraper conveyor. Local explosion-proof industrial computer can implementb local monitoring and controlling of hydraulic supports along the underground tank. The support controller uses the embedded system or a small, efficie
14、nt and reliable PLC (such as the S7-200) to integrate Profibus-DP interface and local control panel, to achieve the collection of various data and movement control of electro-hydraulic valve, thus to control the movement of hydraulic support. Figure 1. Framework of hydraulic supports remote monitori
15、ng system2.3. Network Communication LayerNetwork communication layer is responsible for the communication of upper and lower systems, including OPC Server, Simatic Net to achieve the communication between 3DVR and OPC Server, and Siemens WinCC to achieve the communication between common industrial c
16、onfiguration screen and OPC Server. Local PLC controller communicates with up-ground OPC server through 1000M Industrial Ethernet and fiber optics 2.2.4. Human-Computer Interaction LayerHuman-computer interaction layer is the top layer of the system, responsible for the display of all hydraulic supports state data, control of the command input and set of the system parameter. Hydrau
