Curved Granular Sensing Line to Prevent Measuring Chamber Buildup
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Solution Overview
Problem
Existing electronic devices for detecting granular material in agricultural distribution machines suffer from reduced precision and reliability due to accumulation of solids and contaminants, particularly in the measuring chamber, caused by flow separation and dead zones in the conveying line.
Innovation Solution
The conveying line is designed with an oval shape upstream of the measuring chamber, transitioning to a nearly circular shape with a seamless curvature change, deflecting the multiphase flow towards the center, and using wear-resistant materials to minimize solid accumulation and enhance airflow, combined with adjustable sensor sensitivity and power supply to maintain detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an edge or step is arranged in the measuring chamber to guide granular material past the sensor device, then contamination accumulation is reduced, but flow separation and dead zones are created causing fine particles to accumulate in the enlarged area behind the edge
Solution Approach 1:
The patent replaces the conventional edge or step design with a curved transition section in the conveying line. This curved geometry guides the multiphase flow smoothly around the sensor device without creating sharp transitions, thereby preventing flow separation and dead zones while still protecting the sensor from contamination. The curved path ensures that both air and granular material flow continuously over the sensor area without stagnation.
Solution Approach 2:
The patent utilizes the existing multiphase flow (air carrying granular material) to clean the sensor device continuously. By designing the conveying line with a curved transition, the airflow pattern is optimized to sweep particles away from the sensor area, using the fluid dynamics of the conveyed material itself as a cleaning mechanism without requiring additional mechanical components.
2Ease of operation
If the conveying line has a sharp transition in cross-sectional area, then granular material is guided past the measuring chamber, but flow separation occurs creating dead zones where fine particles accumulate
Solution Approach 1:
The patent employs a curved transition section instead of a sharp angular transition. This curved geometry maintains smooth flow patterns while achieving the same functional goal of guiding material past the measuring chamber. The gradual curvature change prevents flow separation and eliminates dead zones where fine particles would otherwise accumulate.
Solution Approach 2:
The patent changes the geometric parameters of the conveying line transition from sharp angles to gradual curves. This parameter modification alters the flow characteristics, preventing flow separation and dead zone formation while maintaining the ability to guide granular material effectively past the sensor device.
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 design significantly reduces solid accumulation and enhances the operational reliability and precision of granular material detection, ensuring consistent performance over time by minimizing contamination effects and improving airflow dynamics.
Implementation Method 1
through which the granular material can be conveyed in adjustable quantities and in one conveying direction by means of pressure differential and/or gravity
Implementation Method 2
at least one sensor device configured to detect the granular material, in particular in the form of individual grains, without contact within a measuring chamber
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
Electronic device (40) for detecting granular material (G) with a conveying line (41) that is partially round in cross-section, through which the granular material (G) can be conveyed in adjustable quantities and in a conveying direction (R) by means of pressure difference and/or gravity, and at least one sensor device (50) which is configured to detect the granular material (G) without contact within a measuring chamber (51) of the sensor device (50) arranged along the conveying line (41).In order to design an electronic device (40) for detecting granular material (G) in such a way that the operational reliability of such electronic devices (40) is further improved by particularly simple means and/or the precision and/or reliability of the detection is maintained with increasing operating time, it is provided that the conveying line (41) is designed to be curved in sections and has at least one transition (42) which changes in the conveying direction (R) from an oval cross-section (I) to a round cross-section (II), wherein the transition (42) is arranged upstream of the measuring chamber (51) and is designed to deflect the air (L) and/or the granular material (G) to an interior (412) of the conveying line (41).