|
| Design of automatic irrigation system for orchardbased on wireless sensor network |
| |
| DOI： |
|
| Hits: 1507 |
| Download times: 718 |
| Abstract: |
| To solve the problems like high cost of water-saving irrigation system，limited lifetime of wireless sensor
node，no long-term reliable operation and other issues for orchard irrigation，this paper introduced a orchard automatic
irrigation system design based on wireless sensor network node. The system consists of a master node，sensor node and
pump nodes. By selecting the appropriate power，solar panels and solar battery charging chip of lithium rechargeable
batteries，the system effectively extends the life of the sensor nodes to achieve continuous system stability. In an open
area，the effective communication distance is 208 m，node rated voltage is 5 V，operating current is 125 mA，standby
current is 1.6 mA，and solar average charging current is 20 mA. Without charge，for waking up 24 times a day with
frequency of 20 s，sensor nodes can work for about 60 d. In the case of connecting solar panels，rechargeable battery
ensures more than power consumption. Test in orchard shows that，the sensor nodes consume the maximum power for the
collection of soil moisture information. Under the condition of connected solar panel，battery voltage fluctuates within a
small range of rated voltage. Randomly changing the soil moisture of irrigation area，the system can autonomously control
the working status of pumps and valves battery according to the upper and lower limits of soil moisture，to meet the
automatic irrigation demand |
|
View Full Text
View/Add Comment Download reader |
