energy harvesting wireless sensors for greenhouse/climate control applications
DESCRIPTION
Energy Harvesting Wireless Sensors for Greenhouse/Climate Control Applications. Cory Ross (100684747) Evan Geiger (100769090) Husam Albeldawi (100810274) Cameron Barr (100794128) Supervisor: Niall Tait. Agenda. MOTIVATION AND OBJECTIVE MANAGEMENT AND DISTRIBUTION OF LABOUR - PowerPoint PPT PresentationTRANSCRIPT
Energy Harvesting Wireless Sensors for Greenhouse/Climate
Control ApplicationsCory Ross (100684747)
Evan Geiger (100769090)Husam Albeldawi (100810274)
Cameron Barr (100794128)
Supervisor: Niall Tait
Agenda• MOTIVATION AND OBJECTIVE • MANAGEMENT AND DISTRIBUTION OF LABOUR• COMPONENT CONSTRUCTION AND APPLICATION
• SENSORS• CO2 SENSOR
• HUMIDITY/TEMPERATURE SENSORS
• MICROCONTROLLER• COMMUNICATION/INTERCONNECT• PC INTERFACING• POWER STORAGE AND CHARGE CONTROL
THE UNIT!• Block Diagram here
Motivation• Wide Variety of Applications in many locations requiring
dynamic and versatile environmental monitoring and control
• Especially effective:• Retrofitting Old Environmental Controls in Existing
Buildings• Warehouse/Storage monitoring• Greenhouse condition monitoring
Management and Distribution of Labour
• Sensor Network and Microcontroller Programming• Node Communication• PC Interface and Power Systems• Design and Construction of a CO2 Sensor
NDIR Spectrum
[1] Steven Lord. Gemini Observatory. http://www.astronomy.ohiostate.edu/~pogge/Ast161/Unit5/Images/atmos_nirtran.png. Accessed Sept 23,2012.
Sensors: CO2
[2] Buchner, R., et al.: Proceedings of the 14th annual conference on commercializing micro- and nanotechnology (COMS2009). 2009. Copenhagen.
Sensors: Humidity and Temperature
• TMP275 Temperature Sensor • Low power• Digital output, onboard 12-bit ADC
• HIH-5030 Humidity Sensor• low voltage, low power operation• analog output, 0.5% R.H. Accuracy
[4]
[3] http://www.ti.com/product/tmp275[4] http://sensing.honeywell.com/product%20page?pr_id=44871
[3]
Microcontroller
• Silicon labs 8051F996DK• “Ultra-Low” power microcontroller development kit• 150 µA/MHz in active mode• 300 nA sleep mode • Onboard 12 bit ADC• 17 port I/O
[3] http://www.silabs.com/Support%20Documents/TechnicalDocs/C8051F996-DK.pdf
[3]
Communication• Point-to-Point Network Topology • ZigBee Protocol
[5] Faludi, Robert. Wireless Sensor Networks. 1st Edition. Sebastopol: O'Reilly Media, 2011. Print.
Radio Frequency Transceiver• XBee-Pro S2 with Integrated Chip Antenna
• High Performance, Low Power, Low Cost• 295mA Tx Current, 45mA Rx Current (@ 3.3V)• Indoor Range up to 90m• Receiver Sensitivity of -102 dBm
[6] XBee Pro Series 2 Chip Antenna. 2012. MindKits, Auckland. Web. 11 March 2013.
Communication• Serial Interface Protocol: Application Programming
Interface (API)
• Transmit Power Output of Data is +17dBm
[7] "XBee/XBee-PRO ZB RF Modules." Digi International Inc. N.p. Web. 11 March 2013.
PC Interface• Responsible for processing and displaying received data
[8] Devon. Xbee API Packet, Home Automation System - An engineering project. June 5, 2012. www.theskyway.net/en/home-automation-system-an-engineering-project-ee5 (accessed March 10, 2013).
PC Interface• Written in Python• Modules used:
• Matplotlib for plotting• Tkinter for graphics• PIL for imaging• PySerial for data acquisition
• Data processing done here as much as possible to reduce MC power consumption
PC Interface
PC Interface
Charge Control/Storage Circuit
• Voltage Regulator – TI LP2951
• High accuracy output (1.4% at 25 C)
• Steady over Temperature (2%)
• Adjustable output
• Wide input range
• Low Dropout
Charge Control/Storage Circuit
Charge Control/Storage Circuit
Charge Control/Storage Circuit
Charge Control/Storage Circuit
Charge Control/Storage Circuit
Charge Control/Storage Circuit
Charge Control/Storage Circuit
• Rechargeable Batteries Used for charge storage• Can store much more charge and are more stable than
capacitors• 1.2V 2500 mAh C-Cells used• Ni-Metal Hydride
Energy Harvesting• Typical Solar Cell can provide needed 6V input• IXOLAR Mono Solar Cell 42mm x 35mm• 6.3V Output, 50mA Short Circuit Current
Thank You For Your Time!
References• [1] Steven Lord. Gemini Observatory.
http://www.astronomy.ohiostate.edu/~pogge/Ast161/Unit5/Images/atmos_nirtran.png. Accessed Sept 23,2012.
• [2] Buchner, R., et al.: Proceedings of the 14th annual conference on commercializing micro- and nanotechnology (COMS2009). 2009. Copenhagen.
• [3] http://www.ti.com/product/tmp275• [4] http://sensing.honeywell.com/product%20page?pr_id=44871• [5] Faludi, Robert. Wireless Sensor Networks. 1st Edition. Sebastopol: O'Reilly
Media, 2011. Print.• [6] XBee Pro Series 2 Chip Antenna. 2012. MindKits, Auckland. Web. 11 March
2013. • [7] "XBee/XBee-PRO ZB RF Modules." Digi International Inc.. N.p.. Web. 11
March 2013. • [8] Devon. Xbee API Packet, Home Automation System - An engineering
project. June 5, 2012. www.theskyway.net/en/home-automation-system-an-engineering-project-ee5 (accessed March 10, 2013).
•