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Real Time Data Acquisition System over GPRS Link

Introduction of an efficient real-time data acquisition system through GPRS connection for monitoring and transmitting data from industries to regulatory bodies, enhancing transparency and accuracy.

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Real Time Data Acquisition System over GPRS Link

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  1. Real Time Data Acquisition System over GPRS Link Presented by: Dr. Akhila Kumar Swar Senior Environmental Engineer SPCB, Odisha Date: 6th August 2014

  2. Background • Manual monitoring of stack, AAQ and effluent is time taking • Monitoring at regular interval not feasible due to shortage of manpower in most of the SPCBs • Analytical calculations and preparation of analysis reports is again time taking and not free from human errors. • Uploading of these manual monitoring data in the web site of SPCBs/ CPCB takes further time and therefore no real time data is available in the web.

  3. Background • No real time data was available to verify the emission level in each hour as SPCB has been depending on the paper based hard copy report from plants by post. • No facility to display the real time data to the public to understand the prevailing situation of emission at the factory site. • However, paper based hard copy reports sometimes creates doubts in the mind of public.

  4. Background • No automated reporting facility for the SPCB users • No automated communication from SPCB with plant authority to gather knowledge on the issues related to high emission. • No SMS facility on continuous high emission to both plant and to SPCB. • No automated system with SPCB to know about the status of installation/ operation of online monitoring systems in the industries.

  5. Background • Therefore it was necessary to introduce a transparent system to record, interpret and communicate the online monitoring data on real time basis to avoid ambiguities. • The GAP to link SPCB/CPCB with plant and public is the main goal of RT-DAS (Real Time Data Acquisition System)

  6. RT-DAS Background • CPCB advised all the SPCBs of the country during 2011 to install online stack / AAQ / Effluent monitoring system and Real Time Data Transmission to the server of SPCB and CPCB. • In the first phase 25 large industries of Odisha were instructed to install the online monitoring system to measure the Stack emission, Ambient Air Quality with provision of real time data transmission to SPCB.

  7. RT-DAS Background • SPCB Odisha reviewed the technologies available for Real Time Data Transmission inside country and abroad then adopted the GPRS based RT-DAS during 2012. • So far 32 industries have been connected with the RT-DAS server installed at SPCB, Odisha. • AAQ – 44 Stations • Stack – 74 Numbers • Water – 2 Stations • The detailed list of the units follows:

  8. Concepts of RT-DAS • RT-DAS (Real Time Data Acquisition System) is for capturing remote data and transmit the data to the destination server for displaying at users preferable browser without any time lag. • The data should not be captured from the local PC or PLC to avoid any manipulation. • The data should not be history data. • The traffic delay should not be more than certain seconds.

  9. Concepts of RT-DAS This is basically a M2M technology where the data can be captured from the remote devices installed in plants and transmit over a specific medium to the destination server. The GPRS has been chosen as the transmission medium to transfer the remote data after considering the following communication medium: Public Switched Telephone Network (PSTN) i.e. land lines UHF/VHF (Ultra High Frequency / Very High Frequency) General Packet Radio System (GPRS) Satellite

  10. Transmission of data from Online analyzers to SPCB / CPCB over internet LOCAL PC AAQ Internet SPCB /CPCB SERVER

  11. Data Transmission through Internet • Sending data from plant Local PC or LAN system might expose to manipulation. • The program in local PC can be programmed to reduce the value of each parameter to suit SPCB norms. • There might be a chance of controlling/ delaying the transmission by switching off the Local PC showing it as damaged or not working.

  12. Data Transmission through Internet • Data can be corrupted if the Local PC in industry has virus • Saving data in Local PC and transmitting to SPCB does not exactly satisfy the term “REAL TIME”.

  13. Why Y Cable? • To avoid data manipulation and ensure real time data transmission, Y Cable concept has been found to be most suitable by SPCB, Odisha. • Y Cable eliminates the chance of manipulation completely as the data can be captured prior to local PC. • No chance of controlling the transmission by the industry as the data can be captured directly from the RS232 port / 4-20ma output of analyzer.

  14. Why Y Cable? • No threat of virus in case of Y cable • As the output from analyzer can be transmitted directly to SPCB without delay, the data can be termed as “REAL TIME” data • This is basically to capture the data that goes to the local PC or PLC without disturbing the plant’s existing system. • Using Y Cable the analyzer’s data can be bifurcated into two steams at the same time.

  15. Why Y Cable? • The first stream goes to the local PC or PLC of the industry and the second stream goes to the DTU (Data Terminal Unit which is the GPRS Device) for transmission to SPCB Server over GPRS link. • In case of analog signal from analyzer, the Dual Channel Isolator acts as Y Cable allowing the signal to flow to the PLC and to the DTU through a converter circuit (Analog to Digital Converter).

  16. Collecting data directly from AAQ using Y Cable RS232 Y CABLE LOCAL PC AAQ GPRS Network RT-DAS SERVER AT SPCB BHUBNESWAR DTU 247 (GPRS DEVICE )

  17. Dual Channel Isolator acts as a Y Cable in case of analog output from Stack Analyzer GPRS Network DTU 247 (GPRS DEVICE ) Y CABLE 4-20ma Analog to Digital Converter Dual Channel Isolator CEMS STACK ANALYZER RT-DAS SERVER AT SPCB BHUBNESWAR PLC

  18. Real Time Data Transmission over GPRS Link PSTN BTS BSC MSC PCU GSM NETWORK HLR VLR IP NETWORK DTU & CONVERTER GPRS NETWORK CEMS DUAL CHANNEL ISOLATOR IP BASED GPRS BACKBONE GGSN SGSN PACKET DATA NETWORK IP X2.5 PLC ROUTER ISP SPCB Users RT-DAS Server

  19. Real Time Environmental Data Transmission System GPRS Network B T S LOCAL PC Y-Cable GPRS DEVICE AAQ PLC GPRS DEVICE Dual Channel Isolator acts as Y-Cable in Stack RT-DAS SERVER AT SPCB BHUBANESWAR STACK

  20. Displaying AAQ and Stack data in LED Display Board at plants main Gate GPRS Network 4-20ma 4-20ma Dual Channel Isolator ADAM 4017+ CEMS DTU 247 (GPRS DEVICE ) 4-20ma RS485 STACK ANALYZER ADAM 4520 PLC RS232 RS232 to RJ45 Converter Plants Core Switch RS232 to RJ45 Converter RT-DAS SERVER AT SPCB BHUBNESWAR RS232 Y Cable AAQ Digital Display Board at Factory Gate PM – 75 mg/Nm3 PM10- 85ug/m3 SO2 – 25 UG/M3 AAQ STATION DTU 247 (GPRS DEVICE ) PC

  21. Continuous High Emission Alert & SMS Communication for transparency Continuous High Emission triggers the SMS alert to plant & SPCB GPRS Network DTU 247 (GPRS DEVICE ) Y CABLE Analog to Digital Converter Dual Channel Isolator CEMS STACK ANALYZER RT-DAS SERVER AT SPCB BHUBNESWAR SMS from the plant arrived at SPCB Server about the cause of high emission and action taken PLC

  22. Compatibility & Operation of RT-DAS, Odisha • RT-DAS can be connected with online analyzers of any make to capture the data and transmit to the server over GPRS link – this took lot of time to understand and fine tune the RT-DAS. • In Odisha RT-DAS system has been connected with various types of analyzers of different make such as Teledyne, Thermofisher, Horiba, Sick, Ecotech, Environment S.A, Forbes Marshall, Emerson, Met One etc… • The protocol of analyzer has to be matched with the GPRS Device for communication.

  23. Compatibility & Operation of RT-DAS, Odisha • The measurement range of each analyzer is matched with the front end software to display the exact value that shows in analyzer. • Therefore RT-DAS consisting of Pre-Processor and an Application server is able to receive, store and process the real time data received from various online analyzers of different industries. • This has reduced man power, space, infrastructure requirement • The operation maintenance of the RT-DAS can be outsourced or can be run by own IT cell of SPCB / CPCB.

  24. Features of RT-DAS The front end of RT-DAS is equipped with BI (Business Intelligence) functionalities for a better operation. The following features are available in RT-DAS: On-line Real-Time Trend Dash Board Publishing the report to all the authorized users of SPCB automatically 1 Hour Average Report Publishing 24 Hour Average Report Publishing

  25. Features of RT-DAS AD-HOC Reports: SPCB users can create the AD-HOC reports when they need it. The reports can be saved in pdf and xls files and mail to different user if required. 1 Hour average report with Trend Chart 24 Hour average report with Trend Chart 8 Hour average report, Online Pagination View Monthly average report, Online Pagination View Annually average report, Online Pagination View

  26. Features of RT-DAS SMSC (Short Message Service Centre) Alert SMS on high value emission Alert SMS on error detection On Demand/Instant SMS Scheduled SMS

  27. Data Backup in RT-DAS RTU (Remote Terminal Unit) or Data Logger can be connected just before GPRS device for saving the analyzers data for 2 years. Two types of data transfer can be supported by RTU latest data (i.e. since last retrieval) from the logger at a scheduled time. “on-demand” data requested by the data server (i.e. the user) for a specific date and time. Online CSV backup (XLS format) and restore facility has also been provided in the RT-DAS server.

  28. Remote Observation An automated trigger generates when no data received, 4 ma-20ma settings changed, sudden drop of output value of the analyzer reflected in graph in front end. Constant value over a period of time triggers the event of non operation of analyzer or manipulation.

  29. RT-DAS for Flood forecasting in Odisha over GPRS link • Water Resource Department of Odisha has gone ahead using GPRS based RT-DAS to measure Humidity, Wind Direction, Wind Velocity, Solar exposure, Temperature, Humidity, Rain Fall, Water Depth and Water Flow parameter values from 107 stations and transmit all those remote data to their RT-DAS server installed at Bhubaneswar for simulating the Flood Forecasting model. • The data was captured from 7 major rivers and 4 major dams as well. • RT-DAS is already implemented and data received by Water Resource Department at Bhubaneswar.

  30. Configuring the analyzer remotely – under development Configuration settings arrived in SPCB server and data communication resumes again SPCB Server sends command to get the configuration settings from each analyzer Data communication is on HOLD in every 24 hours Analyzer 1 Analyzer 2 Analyzer 3 Analyzer 4 Analyzer 5 GPRS Network

  31. Suggestions • Above all, Surveillance through a team of experts through physical surprise verification of the online analyzers and data transmission systems of the industries should be devised. • However, this will lead to voluntary compliances over a period of time to achieve the goal.

  32. References [1]. Siba. P. Panda, Jay Rath, A. K. Swar and Ranjita Panda, Real time Ambient Air Quality and Stack Emission Data Transmission through Y Cable Mode over GPRS link, International Conference on Chemical, Bio-Chemical and Environmental Science (ICBEE’2012) December 14-15, 2013 Singapore, pp 27-30 http://psrcentre.org/images/extraimages/1212561.pdf [2]. Siba P. Panda, Jay Rath, A. K. Swar, Siddhanta Das, and Ranjita Panda, "Five Y Cable and a Single GPRS Device Transmitted the Real Time Environmental Data from AAQMS," International Journal of Environmental Science and Development vol. 5, no. 4, pp. 398-403, 2014. http://www.ijesd.org/index.php?m=content&c=index&a=show&catid=52&id=831

  33. Live Data The RT-DAS can be accessed by following URL: http://117.239.117.27/ospcbrtdas http://113.19.81.6/ospcbrtdas

  34. References THIS is NOT THE END BUT THE BEGINNING OF A NEW ERA IN rt-das world.

  35. References Thank you for your time…….

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