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Happy Plant Course: PostPC Computing: Embedding InteligenceTeachers: Prof. Scott Kirkpatrick Mr. Amnon DekelPresented by: Ronny Aloni (Computer Science & Biology) Vitaly Lubart (Computer Science)
How does your plant feel today? The problem: people love plants growing in their home and office, but sometimes they forget to water them…
Don’t let your plant get down! Our goal: build a device which senses the humidity level inside the pot, and alerts when it is not sufficient
Product description INPUT OUTPUT Desired humidity level O.K. or: Problem! Current humidity measurement
Product description plant classifier red/green leds On/off switch Soil humidity sensor Battery test button
Product description Video Demo
Technology assessment • Finding the appropriate humidity sensor • Power consumption • Water resistance
Measurement techniques • Gravimetric techniques • Nuclear techniques • Neutron Scattering • Gamma Attenuation • Resistive Sensor (Gypsum) * • Capacitive Sensor * • Time-Domain Reflectometer (TDR) • Tensiometric techniques • Hygrometric techniques • Remote sensing techniques • Optical Methods
Capacitive Sensors The slide is taken from http://www.sowacs.com/feature/netafim/SOILMOIS.PDF
Netafim Sensor The slide is taken from http://www.sowacs.com/feature/netafim/SOILMOIS.PDF
Netafim Sensor The slide is taken from http://www.sowacs.com/feature/netafim/SOILMOIS.PDF
When should the red light turn on? Cacti and succulents- let soil dry out almost completely Flowering plants-Keep moist at all times. Don’t let the soil dry out. Foliage plants- keep uniformly moist but not wet. The soil may dry out a bit.
Cost • Sensor : up to 5 $ • Box : several cents • Batteries : ~ 2$ • Chip : 1$ • Electric circuit : 1$ • Total : up to 10 $
More indicators for water stress • Measured by: • Thermometer • Porometer • Specific antibodies • Photometer Indicator: • Leaf temperature • Leaf humidification • Solute concentration • ABA hormone • Chlorophyll concentraion