Seed Delivery Sensor Alignment for Precision Spacing
Solution Overview
Problem
Existing seed delivery systems face challenges in maintaining accurate and consistent seed spacing at planting speeds greater than 8 km/h due to difficulties in controlling seed movement from the seed meter to the soil, particularly when using air pressure differentials.
Innovation Solution
A seed delivery system incorporating a sensor with alignment tabs and recesses for secure mounting, a side flange for correct orientation, and a brush belt for consistent seed transport, ensuring accurate seed placement and minimizing wear through a wear liner configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If seed is carried by a transport mechanism through the delivery system, then seed can be delivered to the soil, but accurate and consistent seed spacing becomes difficult to maintain at planting speeds greater than 8 km/h
Solution Approach 1:
The patent replaces traditional mechanical seed spacing control mechanisms with an optical sensing system. A sensor detects the presence and position of seeds on the transport mechanism, and this information is used to control vacuum application timing, allowing precise seed spacing maintenance even at higher planting speeds greater than 8 km/h
Solution Approach 2:
The patent implements a feedback control system where a sensor continuously monitors seed position on the transport mechanism. The sensor signals trigger vacuum application and release timing, creating a closed-loop control system that maintains accurate seed spacing dynamically adjusted to planting speed, resolving the contradiction between high productivity and precision
2Manufacturing precision
If a sensor is added to identify passage of seeds through the delivery system, then seed spacing control is improved, but device complexity increases
Solution Approach 1:
The sensor serves multiple functions: detecting seed presence, determining seed position, and triggering vacuum control timing. This multi-functionality reduces the need for separate sensing and control mechanisms, minimizing the increase in device complexity while achieving precise seed spacing control
Solution Approach 2:
The sensor system automatically detects and responds to seed passage without requiring external intervention or complex processing. The sensor signals directly control the vacuum application timing, creating a self-regulating system that improves precision without proportionally increasing complexity
3Measurement precision
If alignment features are added to the sensor for secure mounting, then sensor positioning accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The sensor includes asymmetric alignment features such as alignment tabs and recesses that provide precise positioning in specific directions. These asymmetric features are strategically placed to achieve accurate sensor orientation and positioning without requiring complex assembly procedures, resolving the contradiction between positioning precision and manufacturing ease
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
The system achieves accurate and consistent seed spacing and placement across varying terrain and speeds by securely mounting the sensor and using a brush belt with a wear liner to reduce wear and maintain seed coating integrity.
Implementation Method 1
a sensor configured to detect seed as the transport mechanism moves the seed along a seed path through a housing of the seed delivery system
Implementation Method 2
Various types of seed meters have been developed that use an air pressure differential, either vacuum or positive pressure, to adhere seed to a metering member
Implementation Method 3
vacuum is applied to the opposite side of the disk. As the disk is rotated, individual seeds from the seed pool are adhered by the vacuum to apertures that extend though the disk
Implementation Method 4
When seed falls by gravity from the meter through the seed tube
Data Source
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AI summary
A seed delivery system (400) is disclosed. The seed delivery system (400) comprises a sensor (1404) for detecting seed (152) in said seed delivery system (400) as a transport mechanism of the seed delivery system (400) moves the seed (152) along a seed path (1402) through a housing (402) of the seed delivery system (400), the sensor (1404) comprising a sensor body (1466), a sensor window (1452) and a sensor frame (1450) mounted to the sensor body (1466) and surrounding, at least in part, the sensor window (1452). In order to provide a sensor (1404) or sensor assembly that can be mounted securely and relatively easily to the delivery system (400) it is proposed to include at least one of a first alignment tab (1406) and a first alignment recess (1432), the sensor at least one of a second alignment recess (1426) and a second alignment tab (1424) included on at least one of the sensor frame (1450) and the sensor body (1466); wherein, when the sensor body (1466) is mounted to the seed delivery system (400), the at least one of the second alignment recess (1426) and the second alignment tab (1424) mates, respectively, with at least one of the first alignment tab (1406) and the first alignment recess (1432).