Row Unit Closing Disc Calibration for Wear Detection

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Solution Overview

Problem

Detection of closing disc wear in seeding implements is time-consuming, reducing the efficiency of seeding operations.

Innovation Solution

A system with an actuator, sensor, and controller is used to monitor the extension length of a closing link, determining the wear on closing discs by calculating the offset ratio and adjusting the closing depth to maintain optimal seeding performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If direct measurement methods are used to detect closing disc wear, then measurement accuracy is improved, but operation time increases significantly

Engineering Contradiction:
Improveclosing disc wear detection accuracyVSAvoidseeding operation time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The patent replaces direct mechanical measurement methods with an optical sensing system. A sensor (optical, electrical, or electronic) detects the position of the closing disc relative to the opener disc, converting physical wear into an electrical signal that can be processed rapidly by a controller, thus eliminating time-consuming manual measurements while maintaining accuracy.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an intermediary sensing mechanism between the closing disc and the measurement system. Instead of directly measuring the closing disc wear, the system uses a sensor to detect the actuator's position, which serves as an intermediary indicator of wear, enabling indirect but accurate and rapid wear detection.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If frequent wear detection is performed to maintain seeding quality, then seeding performance is improved, but operational efficiency decreases

Engineering Contradiction:
Improveseeding performance qualityVSAvoidseeding operation efficiency
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The patent implements continuous monitoring of closing disc wear through the sensor system, which operates throughout the seeding process. This eliminates the need to stop operations for periodic measurements, allowing the system to maintain seeding quality while continuously productive, thus resolving the contradiction between reliability and productivity.

Inventive Principle:
Principle #20Continuity of useful action

Solution Approach 2:

The patent establishes a feedback loop where the sensor continuously detects closing disc position and wear, and the controller processes this information to determine when wear thresholds are reached. This real-time feedback enables the system to maintain optimal seeding performance without requiring frequent manual interventions, thereby preserving both quality and efficiency.

Inventive Principle:
Principle #23Feedback

Data Source

PatentUS12628728B2System and method for row unit disk offset calibration
Publication Date: 2026.05.19 CNH INDUSTRIAL AMERICA LLC
  • US12628728B2 patent drawing
  • US12628728B2 patent drawing
  • US12628728B2 patent drawing

AI summary

A system comprising an actuator configured to couple to a closing link and to a frame of an agricultural row unit, a monitoring system comprising a sensor, and a controller comprising a memory and a processor. The closing link is configured to pivotally couple to the frame and the actuator is configured to drive the closing link to rotate relative to the frame to control a closing depth of a closing disc rotatably coupled to the closing link. The sensor is configured to output a sensor signal indicative of an extension length of the actuator. The controller is communicatively coupled to the sensor, and the controller is configured to determine the extension length of the actuator based on the sensor signal.