Bypass Metering Conveyor for Accurate Grain Sampling
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Solution Overview
Problem
Agricultural harvesters face challenges in obtaining an accurate sample of agricultural material within the grain elevator due to separation of clean grain from byproducts, leading to skewed sensor readings and potential harvesting adjustments.
Innovation Solution
The apparatus and system employ a bypass with a funnel portion and metering conveyor to separate and direct agricultural material based on density and size, ensuring accurate representation and preventing overflow by controlling the metering conveyor's speed based on fill level and material type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If agricultural material is allowed to flow freely in the grain elevator, then the sample obtained by sensors may be skewed due to separation of clean grain from byproducts, but controlling the flow rate adds device complexity
Solution Approach 1:
A bypass channel is introduced as an intermediary pathway that diverts a controlled portion of agricultural material from the main grain elevator flow. This bypass includes a metering conveyor that precisely controls the flow rate, ensuring sensors receive an accurate representative sample without requiring modification of the entire grain elevator system.
Solution Approach 2:
The grain elevator system is segmented into multiple independent flow paths: the main elevator conveyor and a separate bypass channel with its own metering conveyor. This segmentation allows independent control of the sample flow for sensing purposes while maintaining the primary material handling function, resolving the contradiction between measurement accuracy and system complexity.
2Measurement precision
If the bypass becomes too full, then accurate sampling is prevented, but preventing overflow requires additional control mechanisms
Solution Approach 1:
A fill level sensor is installed in the bypass channel to continuously monitor the material level. When the bypass approaches full capacity, the sensor triggers a feedback signal that automatically adjusts the metering conveyor speed or activates an overflow outlet, preventing material spillage and ensuring continuous accurate sampling without manual intervention.
Solution Approach 2:
The overflow outlet is positioned and configured to activate before the bypass becomes completely full. This preliminary action prevents overflow by providing an escape path for excess material, maintaining the bypass at an optimal fill level for accurate sensing while avoiding the need for complex real-time control systems.
3Measurement precision
If a bypass is added to control material flow for sensing, then sampling accuracy improves, but the device complexity increases
Solution Approach 1:
The bypass channel is merged with the existing grain elevator structure, utilizing available space and integrating with the main conveyor system. The metering conveyor in the bypass is synchronized with the main elevator operation, and both flows are combined at the discharge point. This merging approach minimizes the addition of separate independent systems, reducing overall complexity while maintaining sampling accuracy.
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 provides a steady and accurate flow of agricultural material to sensors, preventing overflow and ensuring accurate grain quality analysis, thereby improving harvesting operations.
Implementation Method 1
The housing is configured to separate the agricultural material into a first flow and a second flow. The first flow includes a first density and the second flow includes a second density. The first density is greater than the second density.
Implementation Method 2
The second chamber includes a metering conveyor... controlling the metering conveyor's speed based on fill level and material type
Data Source
AI summary
An apparatus for analyzing agricultural material includes a housing defining an inlet adjacent a first end of the housing and configured to receive the agricultural material, a first chamber coupled to the inlet, a first outlet coupled to the first chamber, a second chamber coupled to the first chamber, a funnel portion between the first chamber and the second chamber, and a second outlet adjacent a second end of the housing and coupled to the second chamber. The second chamber includes a metering conveyor. The apparatus includes a first sensor coupled to a first side of the housing. The first sensor may include a camera. At least one second sensor may be coupled to a second side of the housing. The at least one second sensor includes one or more of a moisture sensor, a near-infrared (NIR) sensor, a temperature sensor, a capacitive sensor, and a proximity sensor.