Irrigation Interface With Adjustable Rain and Temperature Cutoff
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Solution Overview
Problem
Existing irrigation controllers lack a user-friendly and adaptable mechanism for interrupting watering schedules based on rainfall and temperature thresholds, with traditional rain sensors requiring mechanical adjustments that are difficult to access and only activating at fixed thresholds.
Innovation Solution
An interface unit with a controller that determines irrigation interruptions based on sensed rainfall and user-set thresholds, featuring a user interface for adjusting parameters and displaying pictorial representations to convey operational states, separate from the irrigation controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional rain sensors are used with fixed thresholds, then the device complexity is reduced, but the adaptability and ease of operation deteriorate because mechanical adjustments are difficult to access and only allow fixed threshold activation
Solution Approach 1:
The system is divided into two separate units: a remote sensor unit that collects rainfall and temperature data, and a local interface unit that processes the data and provides user interaction. This segmentation allows the interface unit to have a full-featured display and controls while the sensor unit remains simple and weather-resistant.
Solution Approach 2:
The interface unit acts as an intermediary between the sensor unit and the irrigation controller. It receives data from the sensor unit, applies user-defined thresholds, and sends control signals to the irrigation controller. This intermediary role enables complex processing and user interaction without complicating the sensor unit or controller.
2Ease of operation
If mechanical adjustments are used for threshold settings, then the device complexity is reduced, but the ease of operation deteriorates because adjustments are difficult to access and not user-friendly
Solution Approach 1:
The mechanical adjustment mechanism is replaced with an electronic interface featuring a display screen and input buttons. Users can interact with the system through the display to view current conditions, adjust rainfall thresholds, and modify temperature thresholds without any mechanical manipulation.
Solution Approach 2:
The display provides real-time feedback to users showing current rainfall amounts, temperature readings, and system status. This feedback mechanism allows users to make informed adjustments and immediately see the impact of their settings, improving ease of operation.
3Adaptability or versatility
If only rainfall sensing is implemented, then the device complexity is reduced, but the adaptability deteriorates because temperature and other atmospheric factors cannot be considered
Solution Approach 1:
The sensor unit is designed to perform multiple sensing functions: rainfall detection, temperature measurement, and potentially other atmospheric parameter sensing. This multi-functionality allows the system to consider various atmospheric factors for irrigation control without requiring separate systems for each function.
Solution Approach 2:
The system dynamically adjusts irrigation control based on real-time atmospheric conditions. By continuously monitoring rainfall accumulation and temperature changes, the system can adapt its control strategy to current environmental conditions, providing more versatile and context-appropriate irrigation management.
4Ease of repair
If the interface is integrated with the irrigation controller, then the device complexity is reduced, but the ease of repair and adaptability deteriorate because modifications are difficult
Solution Approach 1:
The interface unit is designed as a separate, modular component that communicates with both the sensor unit and irrigation controller. This segmentation allows the interface unit to be independently replaced, upgraded, or modified without affecting the sensor unit or controller, improving ease of repair and adaptability.
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
Enables easy adjustment of rainfall thresholds and dynamic irrigation control based on multiple atmospheric factors, improving water conservation and user convenience.
Implementation Method 1
a material that is responsive to rain, and in the event a preset level of rain is exceeded, a switch is activated
Implementation Method 2
an integrated transmitter wirelessly transmits a radio frequency signal to a receiver attached to the controller
Data Source
AI summary
Some embodiments provide an interface unit interfacing with an irrigation controller, comprising: a housing; a controller configured to instruct an interruption of a watering schedule executed by the irrigation controller, the interruption based on one or both of sensed temperature and sensed rainfall amount, and based on one or both of user entered temperature and rainfall threshold parameters; a switching device coupled with the controller, and configured to cause the interruption in response to signaling from the controller; and a user interface comprising: a plurality of user input devices configured to provide signaling to the controller based upon user's engagement, and configured to allow the user to define the temperature and rainfall threshold parameters; and a user display comprising a display screen; wherein the controller is configured to cause the display screen to display a plurality of pictorial representations that in combination convey whether irrigation is being interrupted.