Grain Bin Moisture Control via Dynamic Airflow Path Shortening
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Solution Overview
Problem
Current grain drying systems in bins lack efficient methods to uniformly dry grain, as they rely on maintaining a level surface and separate control systems for spreaders and aeration, which can lead to uneven moisture distribution and potential spoilage.
Innovation Solution
A system with moisture sensors and a controller that adjusts airflow and grain distribution to create a shortened airflow path over high-moisture areas, using capacitive sensors to determine moisture levels and operate spreaders or augers to form cone-shaped or inverted cone-shaped surfaces, ensuring greater airflow through these areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a level grain surface is maintained using motorized grain spreaders, then uniform airflow throughout the grain is promoted, but the system complexity increases due to separate control systems for spreaders and aeration
Solution Approach 1:
The patent combines the grain spreader control system and the aeration system control into a single integrated controller. This unified controller receives inputs from both moisture sensors and grain level sensors, then coordinates the operation of both the grain spreader and aeration fans simultaneously, eliminating the need for separate control systems and reducing overall system complexity.
Solution Approach 2:
The integrated controller serves multiple functions: it monitors grain moisture levels via moisture sensors, monitors grain surface level via level sensors, controls the grain spreader operation, and controls the aeration system operation. This multi-functional approach replaces what were previously separate specialized control systems.
2Manufacturing precision
If ambient or heated air is passed through grain with a horizontal drying front, then grain is uniformly dried, but high-moisture areas may develop spoilage due to insufficient airflow
Solution Approach 1:
The patent implements a feedback control system where moisture sensors continuously monitor moisture levels at different locations within the grain mass. When high-moisture areas are detected, the controller receives this feedback and automatically adjusts the aeration system to increase airflow to those specific areas, preventing spoilage while maintaining uniform drying overall.
Solution Approach 2:
The system transitions from providing uniform airflow throughout the entire grain mass to providing differentiated, location-specific airflow. The aeration system is controlled to deliver increased airflow specifically to high-moisture areas identified by the moisture sensors, while maintaining appropriate airflow in other areas, thus creating local quality variations in the drying process.
3Manufacturing precision
If grain spreaders operate to maintain a level grain surface, then airflow paths are lengthened, but drying efficiency decreases in high-moisture regions
Solution Approach 1:
The patent makes the grain surface dynamic rather than static. Instead of maintaining a constant level surface, the grain spreader is controlled to create varying surface profiles - including shortened airflow paths in high-moisture areas and maintained or extended paths in other areas. This dynamic adjustment optimizes drying efficiency while preventing spoilage.
Solution Approach 2:
The system changes the geometric parameters of the grain surface profile based on moisture distribution. The controller adjusts the grain spreader to create specific surface configurations that alter airflow path lengths, transforming the static level surface into a variable profile that optimizes drying efficiency for different moisture conditions.
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 approach ensures uniform drying by directing increased airflow to high-moisture regions, reducing the risk of spoilage and improving drying efficiency by creating tailored airflow paths within the grain bin.
Implementation Method 1
A plurality of capacitive moisture sensors positioned within the grain bin at various spaced-apart locations throughout the grain bin
Implementation Method 2
The controller is coupled to a fan associated with the grain bin and configured to provide airflow through grain in the grain bin
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A controller (14)is coupled to a plurality of moisture sensors (34) positioned within the grain bin at various spaced-apart locations. The controller (14) determines a grain moisture level adjacent each moisture sensor (34) and compares the grain moisture level to a predetermined maximum moisture level. The controller is coupled to a grain spreader (302) that is configured to selectively distribute incoming grain into the grain bin and operates the spreader to distribute incoming grain to create a shortened airflow path through the grain that encompasses the moisture sensors (34) having determined grain moisture levels above the predetermined maximum moisture level. The controller (14) is coupled to a fan (304) that is coupled to the grain bin and configured to provide airflow through the grain in the grain bin. The controller (14) operates the fan to provide greater airflow through the grain along the shortened airflow path than is provided along airflow paths outside the shortened airflow path.