Header Reel Illumination Using Light-Emitting Reel Fingers
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Solution Overview
Problem
Traditional agricultural illumination systems, such as those used in combine harvesters, often produce shadows due to light sources being remote from the cutterbar, limiting the operator's visibility during nighttime operations by obstructing light with the draper header or crops.
Innovation Solution
The system incorporates a header reel with light-emitting reel fingers, where light sources are integrated into or adjacent to the reel fingers, using optical components like light pipes to transmit light from a central source to apertures on the reel fingers, ensuring illumination is directed downwards and selectively activated/deactivated based on the reel's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If light sources are placed remote from the cutterbar, then the illumination system is simpler to implement, but shadows are produced that limit operator visibility
Solution Approach 1:
The illumination system is segmented by distributing multiple light sources across different reel fingers rather than using a single remote light source. This segmentation allows light to be emitted from multiple locations close to the cutterbar, eliminating shadows while maintaining system simplicity through modular integration.
Solution Approach 2:
Optical components such as light pipes or waveguides serve as intermediaries to transmit light from the light source to the reel fingers. This intermediary mechanism enables efficient light delivery to multiple emission points without requiring complex wiring or power delivery to each individual finger.
2Illumination intensity
If light sources are integrated into reel fingers, then shadow reduction is achieved, but device complexity increases
Solution Approach 1:
The illumination function is merged with the existing reel finger structure. Light sources and optical components are integrated into the reel fingers, combining the cutting mechanism and illumination system into a single unified assembly, thereby reducing overall system complexity.
Solution Approach 2:
The reel fingers serve dual functions: mechanical cutting guidance and light emission. This multi-functionality eliminates the need for separate illumination hardware, reducing device complexity while maintaining effective shadow reduction.
3Illumination intensity
If light is emitted from all reel fingers continuously, then maximum illumination coverage is achieved, but glare towards the operator increases
Solution Approach 1:
Light emission from reel fingers is activated periodically based on the rotational position of the reel. Sensors detect when reel fingers are in positions that would cause glare toward the operator, and light emission is selectively activated or deactivated accordingly, providing periodic control to eliminate harmful glare while maintaining illumination coverage.
Solution Approach 2:
The system uses sensors to detect the rotational position of reel fingers and provides feedback control for light emission. This feedback mechanism ensures light is only emitted when reel fingers are in safe positions, automatically adjusting illumination to prevent operator glare while maintaining maximum coverage when safe.
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 configuration provides targeted illumination to the cutterbar and adjacent areas, enhancing situational awareness and safety by reducing shadows, allowing operators to see obscured regions during nighttime operations without obstructing glare towards the operator.
Implementation Method 1
An optical component may be provided, and the produced light may be transmitted to the aperture via the optical component. The optical component may be a light pipe.
Data Source
AI summary
Systems, methods, and apparatuses for emitting light from a header reel are disclosed. More particularly, systems, methods, and apparatuses for emitting light at one or more locations along a bat tube of a header reel are disclosed. In some instances, a light source may be provided on the bat tube between adjacent reel fingers coupled to the bat tube. In some instances, the light source may be provided at an aperture formed in the bat tube. The emitted light provides for illumination and operator visualization during, for example, agricultural operations performed at night or during low ambient light conditions.