视频监控英文论文.doc

Long-distance supervisory system data terminal research Based on GPRS Abstract：Adaptability is one of the key issues in the important area of surveillance systems. Based on attention and sensor samples, the experiential sampling technique provides a general framework for analyzing video data .In this paper , we present a scheme for adaptive monitoring of surveillance objects by utilizing the feed back of the experiential sampling based video surveillance results to change the video camera parameters. Our framework first detects the moving objects in the surveillance video. We then analyze the output of this step to determine the state of the video camera settings. The relevant parameters of the video camera are continuously adjusted based on a proportional feedback control system. The fixed camera is thus adaptively tuned so as to obtain a good quality surveillance video output. We centrally frame the target object by doing panning and zooming operations. Moreover, we utilize the experiential sampling approach to capture the moving objects by utilizing the context which is a function of the current state of the environment as well as past experiences. This adds tremendous flexibility to the surveillance process which can be applied in a wide variety of monitoring situations.Keywords：GPRS real-time monitoring transmissions data1 introduction With the development of computer technology, Internet technology is particularly extensive and in-depth various aspects of peoples lives. make peoples lives has undergone a profound change. As industrial areas, because of the need to control areas, monitoring of a wide range of objects, hence the need to spend a lot of manpower, material and financial resources for equipment maintenance. Moreover, there are many adverse conditions, it is not easy to stay the occasional moment of arrival or not some field data collection. If the amount of wiring work it is not the economy, is unreasonable. This has helped wireless communications technology development in the field of remote monitoring. In order to obtain robust and accurate results, video surveillance system should have adaptability in order to respond to the changes in the monitored environment. There can be potentially many variations in the monitored environment. These variations mainly come from two aspects: geometric aspects (location, size etc.) of the observed objects and the visibility quality (lighting, contrast) of the monitored environment .Currently available video cameras can be manipulated to track the observed object of interest by performing panning and zooming operations. It is also possible to adjust to the visibility of the environment by automatically controlling camera parameters such as brightness and contrast. Therefore, it would be extremely useful to systematically manipulate these camera parameters so as to adapt to the changing surveillance environment. Our proposed adaptive monitoring method considers both geometric aspect (automatic panning and zooming) in order to follow the movements (position, size) of the monitored object and visibility aspect. Since the adjustment of visibility parameters is similar to our previous work about automatic adjustment video quality for home video in 13. We do not experiment the automatic adjustment of the visibility parameters as opposed to only include it in our framework. Our adaptive monitoring method is based on the experiential sampling (ES) 11 technique. Therefore, we first provide a brief introduction of the ES technique. GPRS (General Packet Radio Service), as the existing GSM network evolution of the transition to the third generation mobile communication technology for (2.5G), with rapid access, always online, so by the flow meter features Remote real-time data transmission in a sudden unmatched advantages. 2 GPRS technologyGPRS (General Packet Radio Service) is based on the GSM mobile network systems, the use of packet switching technology, compatible with GSM, and high-speed data transmission networks, GPRS in the GSM network to introduce a traditional three new components : PCU (Packet Control Unit, a control unit). SGSN (Serving GPRS Support Node. GPRS service node support) and GGSN (Gateway GPRS Support Node. Gateway GPRS support node) with the following characteristics :The high utilization rate of resources to the introduction of the GPRS packet switching mode of transmission, Only users send or receive data only during the occupation of resources This means that many users share the same wireless communications and high efficiency, thereby increasing the utilization of resources. GSM circuit switched data transmission methods and models for the entire link period, Whether users transmit data alone will occupy Channel. GPRS用户的计费按通信的数据流量为计费标准。GPRS Billing users by the flow of data communications for the accounting standards.GPRS data transmission speed of high-speed transmission 57.6KB/s. the highest attainable 115-117.2kb/s fully meet user needs.Access to wait for a short time GPRS access time is short, fast connectivity, the average 2s.Online users will provide real-time line and on-line at the initial state, which will visit service is very simple and rapid.GPRS supports IP and X.25 support of the most widely used Internet IP and X . 25 agreement, but because of GSM network coverage, makes GPRS will provide Internet and other wireless access to a global network.GPRS features can be seen from the above, the GPRS network is particularly suited to the frequent small-volume data transmission.Industry Remote Data Acquisition System is a relatively small volume of data typical of the real-time frequency transmission system. 3 System Design3.1 system structureOverall system structure like chart 1 shows.InternetDataCenterEquipmentDataTerminalEquipmentGPRSDataTerminalGPRS network System structureSerial or user terminal equipment to connect to GPRS wireless data terminals, and then labeled asIP packet data. GPRS air interface to access through GPRS network Gateway Routing and eventually arrived at through various data centers.3.2 terminals hardware designGPRS data terminal hardware modular design, include the data-processing module, remote communication module. analog-digital conversion module and display module, the system structure is shown in figure 2. Serial InterfacemoduleCommunicationCPU MODULEAT89C55ADO8032E2PROMX25045Show moduleterminals hardwareData processing module contains AT89C553, X25045 two chips, AT89C55 for dealing with long-range communication modules, analog / digital converter module and the module data transmission. To ensure that data will not be lost restart. Serial E2PROM X25045 device used for data storage. Remote Communication module includes GPRS module and SIM Serial Module MAX3238 three parts. SIEMENS GPRS wireless module using the MC354GPRS module Its function is to connect the data with an antenna or through an order to launch, the data transmission or reception Remote Monitoring Center. to receive further information or to order corresponding to the agreement, sent through MAX3238 single chip processor, MX3238 starting level conversion and serial communication function Due to the absorption method is the GPRS network, data transmission, it is indispensable to the SIM. function is to store data in a safe condition and complete customer information and customer identification authentication encryption algorithm as a whole. Analog-digital conversion module of the analog signal processing functions will be converted to digital, microprocessor as information sources AD0832 chip circuit design using the chip as the analog-digital conversion. AD0832 first converted into analog signals into digital, and then sent T89C55 chips and handling.When the module is mainly on account management staff to inspect the scene, they can facilitate real-time understanding of the situation. management system using a special keyboard and LED display, intelligent control HD7279A. HD7279A processor uses serial interface, the interface circuit and the external circuit - simple. I occupied lines, only 4, with low cost and high performance. 3.3 Terminal Software DesignData terminals must possess the following basic functions : automatic download the GPRS network. Automatic data centers to the SIM IMSI and its dynamic IP address for data transmission. 3.3.1 Serial DriverData terminal is due to the MCU. Serial communication must begin from the bottom GPRS download and eventually achieve data transmission. Serial opened Serial Driver (Open Comm) closed Serial (Close Comm) Reading serial data (Read Comm), wrote to the serial data (Write Comm) interrupt (Interrupt UartRxISR). 3.3.2 download GPRS networkAT command set to support GPRS Modem its initialization, initialization can be successful for dial-up connections. GPRS and dial-up modem initialization process is as follows : AT+IPR=38400; /把波特率设置为38400b/s，默认值为9600b/s。4003rd regard for the Baud Rate Setting 38400b/s, default values for 9600b/s. AT+CGCLASS=“B”；AT+CGCLASS= B; /设置移动终端的类别为B类，即具有GPRS上网和GSM语音功能，但二者不能同时使用，可自动切换。4003rd mobile terminals for the B category, with GSM and GPRS Internet voice function, However, they can not use that can automatically switch.AT+CGDCONT=1, IP, CMNET; /设置GPRS接入网关，如果Modem返回“310D”则表示初始化成功。4003rd installed GPRS Access Gateway, Modem return 310D said initialization successful. 发送“ATDT*99*1#”若Modem返回“310D”则表示成功接通GPRS网络。Send ATDT*99*1# If Modem return 310D said successfully connected GPR S network.3.3.3 Network consultationGGSN and Modem Communication followed with PPP. After the first modem dial-up communication links with the GGSN for consultations that the point-to-point communication link for the distribution of the parameters, the process followed LCP, PAP, CHAP. IPCP other agreements, LCP for the establishment, structure, testing Link Connection. PAP or CHAP for handling password verification ;IPCP part of the agreement for the establishment of network protocol environment. and distributed IP addresses. Modem接收到IP后将其存入数据终端的配置地址域，数据终端向数据中心发送配置后的数据帧，告知其动态IP地址和IMSI号，数据中心存储收到的信息，作为下传数据的联络信息。Modem will receive its data input terminal for the allocation of IP address fields. Data terminals to the data center configuration data frame transmission, this IMSI and its dynamic IP address. Data center storage to the information received, as under the downlink data from the contact information.3.3.4 transmissions dataAfter network consultation for data transmission. GPRS network to support IP protocol and IP data packets through, transceiver to transmit data at this time, Terminal System GGSN sent to the PPP IP Packet contains all messages will be transmitted to the Internet Network corresponding IP addresses, thereby completing terminal transmission of data via the Internet to remote monitoring center in the process.Realization of the difficult process of the System posted GGSN is a difficult process. Gate way GPRS terminal that is recorded (GGSN) and Gateway to LCP, PAP,IPCP agreement in the course of our consultations.Network consultation process is a complex process, the process is as follows. gateway.GPRS dial-up access, the first successful return to a PAP REQ frame, LCP REQ we sent an empty frame, the agreement forced to the stage of negotiations, then Gateway GPRS send LCP installed frame, we reject all requests to install and test mode PAP or CHAP certify GPRR Gateway option, we will accept only the PAP, PAP user name or password and then verify the process, if successful, Message Gateway GPRS will return IPCP dynamic allocation of IP addresses. 此时就完成了GPRS网关的协商过程，流程如图3所示。Gateway GPRS time to finish the consultation process .4 ConclusionRemote monitoring technology in the field of industrial control applications are extensive, in the power system. Network ignite oil investigation, irrigation, transportation and other areas has a very important role, using GPRS wireless technology makes real-time monitoring system reliability has been greatly improved. Intelligent Monitoring System to further promote the industrial