Camera may be used as a sensor for visual disease.
But its implementation is difficult. Till now perhaps no cost effective solution has come.
.WSN deployed different applications like Water irrigation, Home automation etc. In that Where they have facing more challenges?
The role of sensors always is to sense some phenomenon, so do for mango diseases. There are a number of diseases concerning mango, as well as the other plants. Diseases can be caused by bacteria, fungi, etc. e.g. see http://en.wikipedia.org/wiki/List_of_mango_diseases.
Some of them produce morphological change of plant as a consequence. If the change is visible, you can use visual sensor to detect the change. Note that, the change usually comes at the late stage of disease.
The other way is to use sensors for detection of bacteria, fungi or sensors for detection of chemical changes in environment. Any of these sensors is application specific and their design is a challenging problem. Note that, these sensors usually are not suitable for wireless sensor networks (WSNs) in a way the sensors in WSNs are perceived as low power sensor node components.
Nikola, I found your post interesting, in particular the last part.
I have no experience with chemical sensors, according to what you write, I reckon they require much power to work. If this is not the case, why are they unsuitable for WSNs?
Giuseppe,
Low-cost microprocessing, low-cost RF communications and low-cost sensing are prerequisites for WSNs. 10-15 years ago the idea was that a cost of less than 1$ per WSN node is achievable. On the other side, all WSN node components must be very energy efficient so that WSN can last for years.
Regarding microprocessing and RF communications we are not far from the goal. However, for any serious application you need a number of different sensors including chemical and bio sensors. Such sensors, if exist, are for single use or they are expensive or they consume lot of power. Existance, possibility to use sensor again, low-cost and low-power are expected features for WSN sensors.
To the best of my knowledge, such biosensors and chemical sensors are very rare and commercially unavailable.
Thank you, Giuseppe, please do one help...if you know any literature regarding this please sent that links....to my mail([email protected])
Sensor are being used now a days for plant disease detection as well as to detect its ripeness. There can be mainly two types of sensor for plant disease detection
1. visual sensor- for detecting visual change in plant
2. Biological sensor- for detecting biological change in plant
What types of imaging sensors do people use? There can be various types (wavelengths) of infra-red and optical sensors. I have also heard about "data fusion" methods, combining data from different sensors computationally. Who are the experts in these fields ?. Who would be the consumers of these types of data ?
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