Central Pivot Irrigation Sensor Network for Variable Rate Control
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Solution Overview
Problem
Central pivot irrigation systems face challenges in accurately determining irrigation needs due to variability in field characteristics, such as soil moisture and vegetation cover, as they lack continuous monitoring systems, leading to potential over or under irrigation, especially in regions with different water absorption rates.
Innovation Solution
Implementing a wireless sensor network with optical sensors along the rotating arm and in-ground sensors that transmit data to a central computer, allowing for real-time monitoring and integration of soil and vegetation conditions to create targeted irrigation maps and schedules, adjusting water and fertilizer delivery accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If equal amounts of water are dispensed to the entire field using a central pivot irrigation system, then the operation is simple and efficient, but irrigation precision deteriorates due to variability in field characteristics such as soil moisture and vegetation cover
Solution Approach 1:
The field is divided into multiple zones based on soil moisture levels, vegetation cover, and other characteristics. Each zone is assigned a specific irrigation rate, allowing the system to transition from uniform irrigation to zoned variable rate irrigation. This segmentation enables precision irrigation while maintaining operational simplicity through automated zone-based control.
Solution Approach 2:
The system applies different irrigation rates to different locations within the field based on local conditions. Sensors detect local soil moisture and vegetation characteristics, and the control system adjusts water application accordingly. This allows each area to receive the precise amount of water it needs, improving irrigation precision without complicating overall system operation.
2Measurement precision
If a continuous monitoring system is implemented to determine exact geospatial location for precision agriculture, then irrigation precision is improved, but device complexity increases
Solution Approach 1:
The system combines multiple functions into integrated components. The sensor network, GPS tracking, data processing, and irrigation control are merged into a unified system. This integration improves measurement precision for geospatial location and field conditions while reducing overall complexity by eliminating the need for separate monitoring and control systems.
Solution Approach 2:
The system uses the existing central pivot irrigation infrastructure and its natural movement to deliver sensors and perform monitoring. The rotating arm and pipe segments that already move through the field serve as platforms for sensor deployment, eliminating the need for separate complex monitoring infrastructure. The system essentially uses itself to perform the monitoring function.
3Loss of energy
If variable irrigation rate management is applied to different field zones, then water efficiency is improved, but the complexity of controlling individual nozzles increases
Solution Approach 1:
The system dynamically adjusts irrigation rates based on real-time sensor data and pre-established zone parameters. Flow control valves are automatically adjusted as the system moves through different zones, allowing variable rate irrigation without manual intervention. This dynamic control improves water efficiency while keeping operational complexity low through automation.
Solution Approach 2:
The system incorporates feedback loops where sensor data from soil moisture and vegetation monitors is continuously fed back to the control system. This feedback enables automatic adjustment of flow control valves to maintain optimal irrigation levels, improving water efficiency while reducing the complexity of manual control through closed-loop automation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables precise and efficient water and fertilizer distribution, reducing waste and optimizing crop yield by ensuring tailored irrigation based on real-time field conditions, thereby improving irrigation efficiency and reducing economic losses.
Implementation Method 1
a plurality of optical sensors located along at least one pipe segment of a rotating arm... the plurality of optical sensors may continuously monitor soil and vegetation conditions
Implementation Method 2
a plurality of in-ground sensors scattered in the irrigation area of the field... the plurality of in-ground sensors may continuously monitor soil conditions
Implementation Method 3
the central computer may communicate with individual flow control valves corresponding with each nozzle to open or close to irrigate one or more zones
Data Source
AI summary
A system includes a plurality of optical sensors located along at least one pipe segment of a rotating arm that pivots around an irrigation area of a field, the plurality of optical sensors continuously monitors soil and vegetation conditions and transmits sensed data to a central computer, and a plurality of in-ground sensors scattered in the irrigation area of the field, the plurality of in-ground sensors continuously monitors soil conditions and transmits sensed data to a plurality of gateway devices located in the rotating arm, the plurality of gateway devices transmits data from the plurality of in-ground sensors to the central computer where data from the plurality of optical sensors and the plurality of in-ground sensors is integrated with external data to determine water and fertilizer needs based on which an irrigation schedule is created.