Transcript Environmental Monitoring and Modeling Use of Various

Environmental Monitoring
System at GBC and Its
Components
Presenter:
Sanjaya Gurung
Overview:
GBC Weather Station
RH & Temp.
Solar Radiation
GBC
Wind Speed
& Direction
Weather Station
Barometric
Pressure
wireless medium
Data Cable
Rainfall
Laptop
(Local connection)
Soil Moisture
Server
(Wireless connection
Functional Block Diagram:
Weather Station at GBC
Solar Panel_01
Battery
Backup_02
12 V 7 Ahr
Battery
Backup_01
12 V 12 Ahr
Regulator /
Charger_01
Solar Panel_02
Regulator /
Charger_02
Soil Moisture
Data logger
(CR10X_01)
SDI-12
Weather Station
Data logger
(CR10X_02)
SBC / GPRS
Modem
Index:
Power connection
SDI - Interface
Sensor Connection
Soil Moisture sensors
/ Tensiometers
Datalogger
Battery
Backup
Different kinds of
environmental sensors
Charging
Regulator
Solar Panel
How data is
collected
Causes of
Sys.Power Failure
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
Power Consumption of the
System
 Total average current drain of the system
(Soil Moisture Data logger)
SBC (Active):
SBC (Idle)
320 mA
~ 5 mA
Modem (Active):
Modem (Idle) :
240 mA
25 mA
Soil Moisture Sensor: 15 mA
Tensiometer:
1.3 mA
Data logger (Active):
46 mA
Data logger (Idle):
1.3 mA
Readings from GBC
~ 124 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
Causes of System’s Power
Failure
Something wrong with equipments
– incapable of functioning well




Solar Panel
Charging Regulator
Battery Backup
Data logger
GBC Over View
Functional BD
of GBC
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
Solar Panels at GBC
Weather Station
Solar Panel:
Soil Moisture
Solar Panel:
Model:
Vp:
Ip :
Power (max):
Model:
Vp:
Ip:
Power (max):
MSX10
16.9 V
460 mA
6.8 W
SX-20 U
16.8 V
960 mA
14.2 W
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
Inappropriate connection with the battery (opposite polarity)
may damage the Regulator and ultimately no power during night.
Causes of
Sys.Power Failure
Functional BD of
Weather station
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:
Click on battery
fig. for more
PS12180:
12 V, 18 Ahr
PS12260:
12 V, 26 Ahr
PS12400:
12 V, 40 Ahr
PS121000:
12 V, 100 Ahr
PS12120
12 V, 12 Ahr
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
Causes of
Sys.Power Failure
Functional BD of
Weather station
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,
Causes of
Sys.Power Failure
if this happens, draws a lot of current continuously,
battery capacity NOT enough for compensation
Functional BD of
Weather station
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
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)
Collected Data Sample with
their Engineering Units
http://www.geocities.com/sanjayaworld/envmeasurementparameters.xls
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
CR10X & CR1000
Similarity
CR1000.pdf
CR10X
CR10X Vs CR1000
CR10X Vs CR1000
CR10X
CR1000
Scan Interval (Hz)
64
100
Analog Inputs
6 Diff. or 12 SE
8 Diff. or 16 SE
Digital Ports
8 I/Os
8 I/Os or 4 RS-232 COM
Communication Ports
1 CS I/O
1 CS I/O, 1 RS-232,
1 parallel peripheral
Input Voltage range (Vdc)
± 2.5
± 5.0
Data Storage (Mb)
2
4
Power consumption (mA)
~ 1.5 (Quiescent)
~ 6.0 (Quiescent)
~ 46 (Active)
~ 28 (Active)
Software Support
PC208W
LoggerNet 3.x, PConnect
3.1, PC400, PC200W 3.0,
Programming Language
Edlog (.csi /.dld)
CRBasic (.cr1)
CR10X
CR1000
Similarity: CR10X & CR1000
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
5V
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
THE END
Questions ?
Slides available on
http://www.geocities.com/sanjayaworld/gbcoverview.ppt