Centrifugal Fertilizer Spreader Slide Position Sensor
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Solution Overview
Problem
Centrifugal fertilizer spreaders face issues with reproducible adjustment of the dosing opening size, leading to over- or under-fertilization, and are complex to manufacture due to the use of geared motors with integrated signal discs and light barriers.
Innovation Solution
A centrifugal fertilizer spreader with a rotation angle sensor arranged on the slide axis of rotation allows precise detection of the slide position without intermediate gear elements, enabling precise control of the dosing opening and simplifying the manufacturing process by eliminating the need for complex gear systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a geared motor with integrated signal disc and light barrier is used to detect slider position, then the position can be detected, but the manufacturing complexity increases and the detection precision decreases due to gear play and hysteresis
Solution Approach 1:
The patent extracts the signal detection function from the drive system by placing the rotation angle sensor directly on the slide axis of rotation, separate from the geared motor. This eliminates the need for integrated signal discs and light barriers within the gear mechanism, reducing manufacturing complexity while improving detection precision by removing gear play and hysteresis interference
Solution Approach 2:
The patent introduces a rotation angle sensor as an intermediary device that directly measures the slide position on the axis of rotation. This intermediary sensor provides accurate position feedback without being part of the mechanical drive train, avoiding the problems of gear-induced measurement errors while keeping the drive system simple
2Measurement precision
If a rotation angle sensor is arranged on the slide axis of rotation, then the slider position can be detected precisely without gear play, but the device structure changes
Solution Approach 1:
The patent merges the position detection function with the existing slide axis of rotation structure. By mounting the rotation angle sensor directly on the axis where the slide already rotates, the invention achieves precise detection without adding separate measurement mechanisms, thus improving precision while minimizing structural changes
3Ease of operation
If intermediate gear elements are used to transmit motion to the slider, then the slider can be adjusted, but the position detection becomes inaccurate due to gear play and hysteresis
Solution Approach 1:
The patent segments the control system into two independent parts: the geared motor for slider adjustment and the rotation angle sensor for position detection. By separating these functions and placing the sensor directly on the slide axis, the invention maintains ease of operation through the geared motor while achieving accurate position detection independent of gear errors
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 solution provides precise and reproducible fertilizer dosing, reducing manufacturing complexity and ensuring accurate fertilizer distribution, as the angle of rotation sensor directly detects the slide position without gear play or hysteresis, allowing for precise control of the dosing opening.
Implementation Method 1
a rotation angle sensor for detecting the slide position is arranged on the slide axis of rotation
Implementation Method 2
The centrifugal disc and/or throwing arms for spreading the fertilizer on the field. The centrifugal disc may be rotatable by means of a rotary drive in order to spread the fertilizer by means of centrifugal forces.
Implementation Method 3
The reservoir can be designed at least partially as a downwardly tapering funnel, at the lower end of which the dosing opening is arranged. As a result, the fertilizer slides down in the tapering hopper due to its own gravity and falls through the dosing opening onto the distribution device.
Data Source
Figure 1
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Figure 4~5
AI summary
Centrifugal fertilizer spreader (1) with a storage container (2) for fertilizer and a distribution element (3) for applying the fertilizer to a field, wherein an adjustable metering opening (4) for metering the fertilizer onto the distribution element (3) is formed with a slide (5) which is pivotable about a slide pivot axis (A) by means of a lever (6) and a drive (7) acting thereon, characterized in that a rotation angle sensor (8) for detecting the slide position is arranged on the slide pivot axis (A).