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Info:157. SMS BASED WIRELESS SOLUTION FOR HIGHLY DISTRIBUTED DATA ACQUISITION SYS - Printable Version +- Free Academic Seminars And Projects Reports (https://easyreport.in) +-- Forum: Seminars Topics And Discussions (https://easyreport.in/forumdisplay.php?fid=30) +--- Forum: Engineering Seminars Topics (https://easyreport.in/forumdisplay.php?fid=7) +---- Forum: Seminar Requests (https://easyreport.in/forumdisplay.php?fid=29) +---- Thread: Info:157. SMS BASED WIRELESS SOLUTION FOR HIGHLY DISTRIBUTED DATA ACQUISITION SYS (/showthread.php?tid=56461) |
Info:157. SMS BASED WIRELESS SOLUTION FOR HIGHLY DISTRIBUTED DATA ACQUISITION SYS - shantanu - 10-04-2017 Highly distributed data acquisition system provides real-time data distributed in wide areas at one time, improves the efficiency of management, and gives lot of information to analyze. This kind of system can be This system is a three level hierarchy model. At the top level, there is a master station which acquires data from multiple slave stations situated in a very wide area. The local slave stations communicate with the master station through SMS Each slave station also acts as a master in its own local RS485 network to which several temperature detection modules are connected, these modules are at the lowest level of the hierarchy. It can be imlpmented either based on wired network like internet, or wireless network such as GSM/GPRS. SMS is a very convenient and low-cost way of remote data transfer, so it has a great scope of application. General structure 1.Central monitor subsystem it is at the highest level of the three level-hierarchy model and It mainly consists of an industrial computer called as the master station, a HMI (Human Machine Interface) and a GSM interface. This subsystem gathers information from highly distributed slave stations in two modes: one acquired as the master station which queries and the slave stations send back response; and the information slave stations send unasked during an emergency. further the data received is processed by the program running on the industrial computer .doing complicated analysis, classifying and storing them in different databases and presenting their tendency in plots. The administrator can observe the details of each slave station, and can send commands to it via the HMI and GSM interface. 3. Hardware design of the communication subsystem Contains an LPC2210 is an ARM7 microcontroller without on- chip flash memory a 1M*16bit NOR FLASH SST39VF1601 is used to store code and static data.OS is built in for which its on-chip 16KB SRAM isn't enough, so an extra 256K*16bit SRAM IS61LV25616AL has been added. A 2kbit I2C EEPROM AT24C02 is used to store configuration information. Software design of the communication subsystem Software architecture on uC/OS-II An open-source RTOS uC/OS-II is loaded on LPC2210 for task management.This is a fully- preemptive real-time kernel, and is specially designed for embedded applications, and the source code is very compact. Communication protocol A customer-defined communication protocol between the slave station and the master station is implemented . The message has a fixed format, and is referred to as a packet. Each packet is divided into header and data area. Packet carries 160 characters max. Character # is used in Begin of Header and End of Header fields. |