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Environmental Monitoring System at GBC and Its Components

Environmental Monitoring System at GBC and Its Components. Presenter: Sanjaya Gurung. Overview: G BC Weather Station. RH & Temp. Solar Radiation. GBC Weather Station. Wind Speed & Direction. Barometric Pressure. wireless medium. Data Cable. Rainfall. Soil Moisture.

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Environmental Monitoring System at GBC and Its Components

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  1. Environmental Monitoring System at GBC and Its Components Presenter: Sanjaya Gurung

  2. Overview: GBC Weather Station RH & Temp. Solar Radiation GBC Weather Station Wind Speed & Direction Barometric Pressure wireless medium Data Cable Rainfall Soil Moisture Laptop (Local connection) Server (Wireless connection

  3. Functional Block Diagram: Weather Station at GBC Solar Panel_01 Battery Backup_02 12 V 7 Ahr Solar Panel_02 Battery Backup_01 12 V 12 Ahr Regulator / Charger_01 Regulator / Charger_02 Soil Moisture Data logger (CR10X_01) Weather Station Data logger (CR10X_02) SDI-12 SBC / GPRS Modem Index: Soil Moisture sensors / Tensiometers Different kinds of environmental sensors How data is collected Power connection SDI - Interface Sensor Connection Battery Backup Charging Regulator Causes of Sys.Power Failure Datalogger Solar Panel

  4. Data logger: CR10X Main Component of Environmental Monitoring System widely used by many professional companies and by researchers More CR10X CR10X.pdf Programmable device : Edlog programming Language Provides suitable interface to all the environmental sensors connected Collects the data from all those sensors Stores the data collected in its memory. CR10X & CR1000 Similarity CR1000 CR10X Vs CR1000

  5. Power Consumption of the System • Total average current drain of the system (Soil Moisture Data logger) ~ 124 mA SBC (Active): 320 mA SBC (Idle) ~ 5 mA Modem (Active): 240 mA Modem (Idle) : 25 mA Soil Moisture Sensor: 15 mA Tensiometer: 1.3 mA Data logger (Active): 46 mA Data logger (Idle): 1.3 mA System Power OK for ~ 4 days without no charging source / solar panel i.e., Battery will supply power to the system for about minimum 4 days even if there is no sunlight for 4 days Readings from GBC

  6. Causes of System’s Power Failure Something wrong with equipments – incapable of functioning well • Solar Panel • Charging Regulator • Battery Backup • Data logger Functional BD of GBC GBC Over View

  7. Solar Panel Light energy is converted into electrical energy sunlight direct current Powers the system and charges the battery simultaneously MSX20 MSX10 Not sufficient Larger 17.5 V, 570 mA 17.1 V, 1.17 A Larger Solar Panels: SP20: 16.8 V, 1.19 A SP64R: 17.5 V, 3.66 A 80WSEP: 15 V, 4.8 A Stop charging battery and System’s Power fails if sth. goes wrong with solar panel or no sunlight Causes of Sys.Power Failure Functional BD of Weather station

  8. Solar Panels at GBC Weather Station Solar Panel: Model: MSX10 Vp: 16.9 V Ip: 460 mA Power (max): 6.8 W Soil Moisture Solar Panel: Model: SX-20 U Vp: 16.8 V Ip: 960 mA Power (max): 14.2 W

  9. Charging Regulator Function: Regulates the unregulated output voltage of Solar panel and maintains constant (regulated) voltage at its output Prevents the flow of reverse current from the battery to the solar panel Input: 15 – 28 Vdc Output: 12 Vdc, 1.2 A PS100 Causes of Sys.Power Failure Inappropriate connection with the battery (opposite polarity) may damage the Regulator and ultimately no power during night. Functional BD of Weather station

  10. Battery Backup Function: Battery: Backup System: Power Storage Supply power to the system when there’s no powering source (e.g. here solar power) Higher Capacity Batteries: PS12180: 12 V, 18 Ahr PS12260: 12 V, 26 Ahr PS12400: 12 V, 40 Ahr PS121000: 12 V, 100 Ahr Click on battery fig. for more PS12120 12 V, 12 Ahr Causes of Sys.Power Failure It Should be always connected with charging regulator. If not charged in sufficient amount during day, it may not sustain the system over night Battery Selection should be carefully done for diff. kinds of systems Functional BD of Weather station

  11. Data logger Function: Provides suitable interface to all the sensors connected Collects the data from all those sensors Stores the data collected in its memory. CR10X Internal power circuit may go sometime wrong Some ports (e.g. Excitation i/p port) may be short circuited with 5 V port, if this happens, draws a lot of current continuously, battery capacity NOT enough for compensation Causes of Sys.Power Failure Functional BD of Weather station

  12. How Data is Collected ? Data logger : Sampling Rate: 15 mins. (can be changed) i.e., Programmed to sample the data in every 15 mins. All the sensors connected are activated in every 15 mins and collect the data from the environment (Active period is less than a minute) Both data loggers (Weather & Soil Moisture) convert the collected raw data (uncalibrated ) into the calibrated engineering units Stores all the data into their memory elements Functional BD of Weather station

  13. How Data is Collected ? (Contd..) All the data are transferred to Soil Moisture Data logger from Weather Station Data logger All the data can be downloaded from soil moisture data logger by connecting LAPTOP Now, since wireless connection has been already established, all the data can be collected remotely (e.g. from LAB)

  14. Collected Data Sample with their Engineering Units http://www.geocities.com/sanjayaworld/envmeasurementparameters.xls

  15. CR1000 New Latest Data logger by Campbell Scientific Inc. Successor of CR10X Additional built in hardware - more peripherals More memory: 4 Mb Wider input range: 5 V Software Support: LoggerNet, PC400 Upgrade from older version e.g. PC208W CR1000 More CR1000.pdf CR10X & CR1000 Similarity CR10X CR10X Vs CR1000

  16. CR10X Vs CR1000 CR10X CR1000 Scan Interval (Hz) Analog Inputs Digital Ports Communication Ports Input Voltage range (Vdc) Data Storage (Mb) Power consumption (mA) Software Support Programming Language 64 6 Diff. or 12 SE 8 I/Os 1 CS I/O ± 2.5 2 ~ 1.5 (Quiescent) ~ 46 (Active) PC208W Edlog (.csi /.dld) 100 8 Diff. or 16 SE 8 I/Os or 4 RS-232 COM 1 CS I/O, 1 RS-232, 1 parallel peripheral ± 5.0 4 ~ 6.0 (Quiescent) ~ 28 (Active) LoggerNet 3.x, PConnect 3.1, PC400, PC200W 3.0, CRBasic (.cr1) CR10X CR1000 Similarity: CR10X & CR1000

  17. Similarity: CR10X & CR1000 Power Supply for Data logger: 9.6 V – 16 V 12 V nominal No. of control ports: 8 Power supply for sensors 5 V No. of Pulse Inputs: 2 A/D Conversion 13-bit Extreme Temp. range: - 55 0C to +85 0C more about CR10X Vs CR1000 http://www.campbellsci.ca/Catalogue/LoggerCompTable_Br.pdf CR10X CR1000 CR10X Vs CR1000

  18. THE END Questions ? Slides available on http://www.geocities.com/sanjayaworld/gbcoverview.ppt

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