Harvester Cutting Unit Height Control via Load and Distance Sensors

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Solution Overview

Problem

Existing cutting unit height guidance systems require manual or automated switching between operating modes, which can be distracting for the driver and may lead to inaccurate adjustments, potentially causing damage to the cutting unit or crop losses.

Innovation Solution

The integration of a distance sensor and a load sensor with an evaluation device that computes a height control-relevant signal, allowing continuous incorporation of sensor values from both sensors into the height control system without the need for mode switching.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If manual or automated switching between operating modes is implemented, then the height guidance can be adapted to different harvesting conditions, but the driver becomes distracted and adjustments may become inaccurate

Engineering Contradiction:

Improveheight guidance adaptationVSAvoidadjustment accuracy

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent combines distance sensor data and load sensor data into a single integrated evaluation device that continuously computes height control signals. This merging eliminates the need for switching between separate operating modes, maintaining adaptability while improving reliability through continuous unified processing of both sensor inputs.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The evaluation device serves multiple functions simultaneously: it processes distance sensor information, processes load sensor information, and generates height control signals continuously without mode switching. This multi-functionality allows the system to adapt to different harvesting conditions while maintaining consistent operational reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If frequent adjustments are made to maintain accurate height guidance, then the cutting unit height can be optimized, but the driver becomes increasingly distracted

Engineering Contradiction:

Improveheight guidance precisionVSAvoiddriver operation

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The system performs self-service through automatic continuous height control based on integrated sensor evaluation. The evaluation device autonomously processes sensor data and generates control signals without requiring driver intervention, maintaining precise height guidance while freeing the driver from frequent manual adjustments.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system implements continuous feedback by constantly monitoring both distance sensor and load sensor inputs, evaluating their combined information, and automatically adjusting height control signals. This closed-loop feedback mechanism maintains measurement precision while eliminating the need for driver-initiated adjustments.

Inventive Principle:

Principle #23Feedback

3Productivity

If the cutting unit is adjusted closer to the ground to improve harvesting efficiency, then productivity increases, but the risk of damage to the cutting unit or crop loss increases

Engineering Contradiction:

Improveharvesting efficiencyVSAvoiddamage risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system provides beforehand cushioning through continuous monitoring of both distance and load sensors that anticipate potential ground contact or excessive loading conditions. By evaluating combined sensor data continuously, the system can preemptively adjust height control signals to prevent damage before it occurs, allowing safer operation at lower heights.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The continuous feedback mechanism monitors real-time conditions from both sensors and automatically adjusts height control to prevent harmful situations. This enables the cutting unit to operate closer to the ground for improved productivity while the system continuously adapts to prevent damage or crop loss.

Inventive Principle:

Principle #23Feedback

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 reduces the need for frequent adjustments, minimizes driver distraction, and enhances the reliability of height guidance, allowing the cutting unit to be adjusted closer to the ground while reducing the risk of damage or crop loss.

Implementation Method 1

at least one distance sensor arranged at the cutting unit for determining the distance of the cutting unit from the ground

Methodology Applied

Scientific EffectDistance sensing:

Implementation Method 2

the cutting unit comprises at least one additional load sensor measuring the load with which the cutting unit loads the intake duct

Methodology Applied

Scientific EffectLoad sensing:

Data Source

PatentUS12302790B2Cutting unit having sensors for height control

Publication Date: 2025.05.20 CARL GERINGHOFF GMBH & CO KG

AI summary

The present invention related to a cutting unit for attachment to the height-adjustable intake duct of a harvester. In order to improve the sensor-supported height guidance of cutting units it is proposed to provide at least one additional load sensor which measures the load with which the cutting unit loads the intake duct, in order to calculate a height-control-relevant signal from the transmitted sensor values of the distance sensor and the load sensor via an evaluation device which the signal is transmitted to the interface.