Seed Drill Sensor Housing Merging for Cabling Reduction
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Solution Overview
Problem
Agricultural seed drills with separation units face challenges in efficiently integrating flow or particle sensors due to high cabling requirements and reduced operational reliability when serving multiple seed rows.
Innovation Solution
The integration of multiple outlet openings with a common signal evaluation unit and detectors in a shared housing, along with a multiplexing process, reduces cabling needs and enhances reliability, allowing for cost-effective production and improved detection accuracy by using a single communication and power supply line per housing unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate signal evaluation units and detectors are assigned to each outlet opening, then detection accuracy is improved, but device complexity and cabling requirements increase
Solution Approach 1:
Multiple detectors for different outlet openings are integrated into a single common housing, sharing a common signal evaluation unit and circuit board. This merging approach maintains detection accuracy for each outlet while significantly reducing the number of separate cables and connectors needed, as all detectors communicate through shared communication and power supply lines.
Solution Approach 2:
The common signal evaluation unit serves multiple detectors simultaneously, performing universal signal processing functions for all outlet openings. The single housing structure provides universal protection and mounting for multiple detectors, eliminating the need for individual housing units for each detector and reducing overall system complexity.
2Reliability
If multiple detectors are fixed to individual outlet openings, then detection reliability is improved, but ease of manufacture decreases
Solution Approach 1:
Multiple detectors are mounted on a single common circuit board within one housing, allowing them to be manufactured and tested as a single integrated assembly. This approach maintains reliable detector positioning and electrical connections while enabling cost-effective production through standardized manufacturing processes for the entire detector array rather than individual assembly of multiple separate units.
3Device complexity
If detectors are arranged in a common housing, then device complexity is reduced, but measurement precision may be compromised
Solution Approach 1:
While detectors are housed together in a common structure, each detector maintains its own dedicated detection channel and optical path specific to its outlet opening. The signal evaluation unit processes signals from each detector separately, ensuring that measurement precision for each outlet is preserved despite the physical consolidation of the housing structure.
Data Source
AI summary
An agricultural seed drill with a seed sensor, generally of the type having a plurality of row units comprising a separation device. The separation device is provided with two or more separate outlet openings for separated seeds, and wherein each outlet opening is associated with a guide channel and a furrow opener, for depositing seed into a ground furrow. Further, a detector is arranged between the outlet opening and the furrow opener, to detect the discharge of a separated seed element through the outlet opening into the furrow opener and to convert it into a signal.