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My INTRODUCTION

My INTRODUCTION. Sanjaya Gurung (Nepal)

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My INTRODUCTION

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  1. My INTRODUCTION Sanjaya Gurung (Nepal) Master’s in Electrical Engineering University of North Texas E-mail: sg0228@unt.edu / gurung_sanjaya@yahoo.com Home Page: http://www.geocities.com/sanjayaworld Research: Environmental Monitoring and Modeling Dr. Miguel Acevedo, Coordinator, Biological and Environmental Engineering, University of North Texas

  2. My INTRODUCTION (Contd..) Bachelor of Engineering in Electrical and Electronics Kathmandu University, Nepal Research Interests: Wireless communication: Mobile Communication, Microwave Communication Optical Fiber Communication Electronic Sensors

  3. Field Work Experiences: Spice Nepal Pvt. Ltd.(Mobile Operator of Nepal) 1.5 year (18 months) BTS Installation/Commissioning Engineer Huawei Technologies Co. Ltd.(Telecommunication Contractor of China) 1 year Microwave Radio Network Engineer

  4. Environmental Monitoring and ModelingUse of Various Environmental Sensors Presenter: Sanjaya Gurung Master’s in Electrical Engineering University of North Texas Weather station

  5. Introduction • Observing Environmental phenomena by deploying different kinds of bio-electronic sensors and collecting data • Modeling our environment accordingly

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

  7. Functional Block Diagram: Weather Station at GBC Solar Panel_01 Battery Backup_02 Solar Panel_02 Battery Backup_01 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 Data logger Solar Panel

  8. Hardwares / Softwares at GBC

  9. Hardwares / Softwares at GBC (Contd..)

  10. Currently Working… • Reliable System Power – Setup WHY ?

  11. Risk of System’s Power Failure • Loss of data (Every single data is important) • Environmental Modeling: NOT Good

  12. Causes of System’s Power Failure Something wrong with equipments: • Solar Panel • Charging Regulator • Battery Backup • Data logger Functional BD of GBC GBC Over View

  13. Solar Panel Function: 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 Causes of Sys.Power Failure Functional BD of Weather station

  14. Charging Regulator Function: Regulate the unregulated output of Solar panel and maintains constant (regulated) voltage at its output Prevents the flow of reverse current from the battery to the solar panel Causes of Sys.Power Failure Inappropriate connection or short circuit may damage the battery connected and ultimately no power during night. Functional BD of Weather station

  15. 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

  16. 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. more: CR10X CR10X.pdf 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

  17. Power Consumption of the System • Total average current consumption of the system (Soil Moisture Data logger) ~ 167 mA SBC (Active): 320 mA SBC (Idle) ~ 0 mA Modem (Active): 240 mA Modem (Idle) : 25 mA Soil Moisture Sensor:10 mA Tensiometer: 1.3 mA System Power OK for ~ 3 days without no charging source / solar panel i.e., Battery will supply power to the system for about 3 days even if there is no sunlight for 3 days Readings from GBC

  18. How Data is Collected ? Data logger : Sampling Rate:15 Minutes (can be changed) Programmed to sample the data in every 15 mins. All the sensors connected is 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 data (uncalibrated ) into their own engineering units Stores all the data into their memory elements Functional BD of Weather station

  19. 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)

  20. Sample Data from GBC When everything OK …. 01 Whole System Down …. 02 When SDI-interface not working… 03 (Weather Station Data logger is disconnected from Soil Moisture Data logger) Weather logger: connected/disconnected … 04 Weather data_collected_separately…. 05

  21. THANK YOU Questions / Comments?

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