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Precision
Irrigation Control System
Irrigate only when needed with EIT
precision irrigation control system. The EIT irrigation control system
uses telemetry for data collection and valve control ( no cables to worry
about ) and sensors in the soil to report on exact soil moisture conditions.
The control system will water plants based on plant water usage.
see
also discussion under Project section
| EIT irrigation control system is
a data collection and SCADA based control system which utilises EIT data
telemetry products as well as third party supplied soil sensors for monitoring
and scheduling irrigation activities.
The system is designed for flexibility
and ease of use. The Human Machine Interface ( HMI ) provides easy to use
functions for setting an selecting irrigation modes and soil moisture set
points.
The system comprises of three main
components. These are the central PC, sensor for monitoring soil moisture
and telemetry for data collection, valve and pump control. |
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| PC main layout
Information on all irrigation areas
may be quickly accessed from the main layout screen. Current soil water
status is represented by way of bar style graphs and historical data represented
by line graphs.
Irrigation solenoid valves are color
coded on the computer screen to denote open / closed status.
Field data is collected by way of
EIT
telemetry devices which both collect data from soil moisture sensors
and switch solenoid valves. |
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| Setting soil moisture control.
Soil moisture is controlled to exact
requirements. Each block may have different irrigation set points. Once
you set these then the EIT irrigation management system will maintain soil
moisture within your desired soil moisture bandwidth. Irrigation is initiated
when soil moisture drops to the level of the lower red slider. The system
will schedule irrigation based on the requirements of the irrigation area,
water and the time available for irrigation. For example, if two blocks
are extremely dry, then options are available to proportion available water
between each block rather than completely filling the first block to the
detriment of the others. |
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| Soil moisture monitoring
Soil moisture may be monitored using
various soil moisture sensors. These include Sentek
EnviroSMART or Sentek EasyAg style soil sensors and those from other
manufacturers providing sensors with SDI-12 , RS 485 or voltage output.
Data is collected from the soil probes
using EIT solar powered telemetry devices. These devices operate in a polled
mode sending soil data to the central PC whenever requested. Usually every
ten minutes.
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| Data Display
The EIT IMS system provides powerful
graphing
tools for viewing trends in soil moisture. Data may be displayed in
a 'stacked sensor style' or summed line type graphs. The trend lines allow
the operator to gain insight into plant water use patterns this information
can be used to adjust the IMS to optimize water use efficiency and plant
production |
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