Agricultural Planter Trench Depth Control via Dual Actuators
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional agricultural planters lack effective systems for controlling and measuring the depth of trenches opened during planting, leading to inconsistent seed placement and potential yield reduction due to insufficient depth adjustment mechanisms.
Innovation Solution
The implementation of a depth adjustment assembly with primary and secondary adjustment sub-assemblies, including actuators and sensors, which allow for precise control of trench depth by limiting gauge wheel travel and using actuators to modify the furrow depth, ensuring consistent seed placement across varying soil conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional depth adjustment mechanisms are used, then the planter can operate with simple structure, but the trench depth control precision is insufficient
Solution Approach 1:
The depth adjustment system is divided into two independent sub-assemblies: a primary depth adjustment assembly with a first actuator for coarse depth control, and a secondary depth adjustment assembly with a second actuator for fine depth control. This segmentation allows each sub-assembly to be optimized for its specific function, achieving high precision depth control without requiring an overly complex monolithic system.
Solution Approach 2:
The system employs dynamic depth adjustment capability where the trench depth can be modified in real-time during planter operation. The actuators can adjust the depth setting based on varying soil conditions, allowing the system to adapt dynamically rather than being fixed, thereby improving precision without permanently increasing structural complexity.
2Reliability
If maximum planting depth is set by conventional mechanisms, then the system remains simple, but the depth is not maintained during operation due to soil conditions or insufficient downpressure
Solution Approach 1:
The system incorporates depth sensors that continuously monitor the actual trench depth during operation. This feedback information is used to detect when depth deviation occurs due to soil conditions or insufficient downpressure, triggering automatic or manual depth adjustments to maintain the desired planting depth, thereby improving reliability.
Solution Approach 2:
The dual actuator system is pre-configured with the capability to adjust depth before depth problems occur. The primary actuator sets the initial depth, and the secondary actuator is ready to make corrective adjustments if depth deviation is detected, preventing poor seed placement rather than merely responding to it.
3Measurement precision
If sensors are added to determine trench depth loss, then depth monitoring capability is improved, but the actual planting depth is still not determined
Solution Approach 1:
The patent introduces a depth calculation module that acts as an intermediary between the depth sensors and the control system. This module processes sensor data along with actuator position information to calculate and determine the actual planting depth, providing complete depth information without requiring additional complex sensing infrastructure.
4Productivity
If inconsistent seed placement occurs due to depth variation, then yield may be reduced, but no mechanism exists to ensure consistent depth across varying soil conditions
Solution Approach 1:
The system enables dynamic changes in the depth parameter based on varying soil conditions. The actuators can modify the trench depth setting in response to soil hardness, moisture content, and other environmental factors, allowing consistent seed placement across diverse soil conditions and thereby maintaining productivity and yield consistency.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Systems, methods and apparatus for adjusting the depth of a trench opened by a row unit of an agricultural planter. The row unit includes a trench depth adjustment assembly configured to modify the furrow depth. In one embodiment, the depth adjustment assembly may include a gear box having one or more gears which engage with a gear rack. The gear box may be pivotally connected to a depth adjustment body supporting a rocker that adjusts upward travel of gauge wheel arms. In another embodiment, the depth adjustment assembly may include a depth adjustment arm having a screw receiver that cooperates with a driven screw that adjusts the position of the depth adjustment arm acting on the gauge wheels to adjust trench depth.