Double Disc Coulter Depth Guide Roller Pressure Control
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Solution Overview
Problem
Existing spreading machines face challenges in maintaining consistent seed or fertilizer placement depth across varying soil conditions, as the depth control roller can sink too deep in light soils or fail to reach the set depth in dense soils, leading to uneven seed or fertilizer distribution.
Innovation Solution
A coulter pressure device with a depth control roller and sensor system that adjusts the supporting force dynamically, ensuring the distribution coulter reaches the desired depth and applies optimal pressure, using hydraulic cylinders and sensors to regulate pressure based on soil conditions and GPS data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the coulter pressure device exerts great force on the distribution coulter to achieve desired placement depth in all soil conditions, then the placement depth is ensured, but the depth control roller sinks too deep into light soil or presses seed row too hard
Solution Approach 1:
The coulter pressure device transitions from a static fixed-force system to a dynamic adjustable system. The force exerted by the coulter pressure device can be dynamically adjusted based on soil conditions detected by the sensor system, allowing optimal pressure application for both light and dense soils without compromising placement depth consistency or causing excessive roller sinking
Solution Approach 2:
The system changes the pressure parameter of the coulter pressure device based on detected soil conditions. The control system modifies the force parameter in real-time according to sensor feedback about soil density and roller support conditions, enabling adaptive pressure application that maintains placement depth while preventing excessive roller penetration into light soils
2Manufacturing precision
If the coulter pressure device exerts great force on the distribution coulter, then placement depth is achieved in dense soil, but the distribution coulter cannot reach the set working depth when pressure is insufficient
Solution Approach 1:
The sensor system continuously monitors the actual placement depth and roller support pressure, providing feedback to the control system. This feedback loop enables the coulter pressure device to adjust its force output in real-time, ensuring the distribution coulter reaches the set working depth regardless of soil density variations, thereby improving both placement depth precision and working depth reliability
Solution Approach 2:
The system automatically detects and corrects insufficient coulter pressure conditions without external intervention. When sensors detect that the distribution coulter has not reached the set working depth, the control system autonomously increases the pressure from the coulter pressure device, allowing the system to self-correct and achieve reliable working depth penetration
3Strength
If the depth control roller is subjected to too much supporting force in light soil conditions, then the roller sinks too deep or presses seed row too hard, but the force is necessary for optimal pressing in dense soil
Solution Approach 1:
The system dynamically changes the support pressure parameter of the depth control roller based on soil conditions. In light soils, the control system reduces the supporting force to prevent excessive sinking and hard pressing of the seed row, while in dense soils it increases the force to achieve optimal pressing, thereby maintaining appropriate pressing strength across varying soil conditions
Solution Approach 2:
The depth control roller transitions from a static fixed-support system to a dynamic adjustable system. The supporting force applied by the roller is continuously adjusted based on real-time sensor feedback about soil conditions and roller penetration depth, enabling optimal pressing force application that adapts to both light and dense soil conditions without causing operational problems
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
Ensures consistent seed or fertilizer placement depth and optimal soil compaction by dynamically adjusting the depth control roller's support pressure, adapting to changing soil conditions and maintaining uniformity across the field.
Implementation Method 1
the supporting force exerted on the distributing coulter via the depth control roller and this supporting force is recorded by a sensor
Implementation Method 2
using hydraulic cylinders and sensors to regulate pressure based on soil conditions and GPS data
Data Source
Figure 1
Figure 2
AI summary
The coulter (1) has a sensor (18) detecting supporting force of the coulter on a depth guide roller (2) and supporting pressure of the roller on a bottom. A regulating device controls the pressure based on the supporting force. The coulter is movably connected with a frame (3) of a drilling machine by carriers (11) around a lateral axis in a vertical direction. The coulter independently upwardly evades from the roller by overloads. Force exerted on the coulter by the regulating device is controlled by a pressing device (4) and an energy storage (5) such that the pressure remains constant.