Auxiliary Sprinkler Controller Weather Forecast Integration
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Solution Overview
Problem
Conventional irrigation systems waste water due to lack of weather prediction capabilities, fixed watering schedules, and manual programming requirements, leading to over-watering and inefficiencies in adjusting watering durations across multiple zones.
Innovation Solution
An auxiliary sprinkler controller that uses internet-based weather data to selectively enable or inhibit sprinkling durations in existing sprinkler systems, allowing for customized watering schedules and remote programming, without the need for local weather sensors or manual adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a rain sensor is used to prevent watering after rainfall, then water waste is reduced for recent rain events, but the system cannot predict upcoming rain and still over-wateres when rain occurs within 24 hours
Solution Approach 1:
The system performs preliminary actions by checking weather forecasts before executing the watering schedule. The controller proactively retrieves weather prediction data and uses it to preemptively adjust or cancel scheduled watering events, preventing both over-watering from recent rain and unnecessary watering before predicted rain events.
Solution Approach 2:
The system implements feedback by continuously monitoring weather forecast data and using this information to dynamically adjust the irrigation schedule. The controller receives weather information, processes it against the predetermined time period threshold, and modifies watering operations accordingly, creating a closed-loop system that adapts to predicted weather conditions.
2Ease of operation
If a fixed watering schedule is used, then the system is simple to operate, but it cannot adapt to weather changes and forces watering on sub-optimal days
Solution Approach 1:
The system transitions from a static fixed schedule to a dynamic adaptive schedule by incorporating weather forecast checks. The controller automatically adjusts watering timing based on predicted rain events, allowing the schedule to flex and adapt to changing weather conditions while maintaining ease of operation through automated decision-making.
Solution Approach 2:
The system changes the timing parameter of the watering schedule based on weather forecast data. When rain is predicted within the predetermined time period, the controller modifies the scheduled watering time or cancels it entirely, demonstrating parameter adaptation without requiring complex user intervention.
3Manufacturing precision
If manual programming is required for each zone's watering duration, then precise control is achieved, but the system becomes complex and requires frequent manual adjustments
Solution Approach 1:
The system performs self-service by automatically adjusting watering durations for multiple zones based on weather forecasts. The controller independently processes weather data and modifies the operation of multiple solenoid valves without requiring manual reprogramming, maintaining precise zone-specific control while eliminating the need for frequent user intervention.
Solution Approach 2:
The controller exhibits multi-functionality by managing multiple zones with different watering requirements through a single unified device. The auxiliary controller integrates weather forecast processing, schedule management, and zone-specific duration control in one unit, reducing overall system complexity while maintaining precise control across all zones.
Data Source
AI summary
An auxiliary sprinkler controller is used to control sprinkling by selectively enabling or inhibiting operation of a legacy sprinkler controller. The legacy sprinkler controller provides electrical power to a particular zone of several zones during each of a plurality of durations, and multiple durations, “n,” are provided for each zone. As a result, each zone can be watered for any of 2n combinations of the durations for a desired total watering duration.