Insect Pupae Dispensing System Using Sloped Walls and Filter Cups
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Solution Overview
Problem
Existing methods for estimating and distributing mosquito populations across different stages of development, such as larvae, pupae, and adults, are inefficient and require significant human intervention or specialized equipment, as the density and size variations between stages complicate accurate counting and grouping.
Innovation Solution
An insect dispensing system comprising a container with sloped walls and filter cups that allows for the even distribution of pupae by draining water through filter cups, which are designed to hold a specific number of pupae, enabling quick and accurate division of large quantities into equal groups with minimal human intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual counting and singulation methods are used to distribute mosquito pupae, then accuracy can be maintained, but the process becomes time-consuming and labor-intensive
Solution Approach 1:
The system enables self-service distribution where the pupae automatically sort themselves into groups based on their natural behavior of climbing onto the filter cups. The sloped walls guide the pupae to distribute evenly across multiple cups without manual intervention, achieving both speed and accuracy through the pupae's own movement patterns.
Solution Approach 2:
The system uses water flow through the filter cups to facilitate pupae distribution. Water is pumped through the filter cups, creating a hydraulic environment that encourages pupae to climb and adhere to the cup surfaces, enabling automatic grouping without manual handling.
2Productivity
If automated singulation systems are used to distribute pupae, then speed increases, but equipment complexity and cost increase
Solution Approach 1:
The system divides the distribution task into segments by using multiple filter cups arranged in arrays. Each cup acts as an independent collection point, and the sloped wall structure segments the flow path to guide pupae to different cups. This segmentation achieves automated distribution using simple, modular components rather than complex single-unit equipment.
Solution Approach 2:
The filter cups serve as intermediaries between the water flow and the pupae. Instead of directly manipulating pupae with complex mechanical systems, the system uses water as an intermediary medium that naturally induces pupae to climb and adhere to the filter cups, simplifying the overall system design.
3Device complexity
If conventional distribution methods are used, then equipment simplicity is maintained, but distribution accuracy and evenness deteriorate
Solution Approach 1:
The filter cups are positioned asymmetrically on the sloped walls rather than in a symmetric grid pattern. This asymmetric arrangement, combined with the sloped geometry, creates natural flow paths that guide pupae to distribute more evenly across all cups. The asymmetry in wall slope angles and cup positions prevents clustering and promotes uniform distribution.
Solution Approach 2:
The sloped walls are designed with curved surfaces that guide the flow of water and pupae. The curvature of the sloped walls helps to evenly distribute the pupae across the filter cups by creating smooth flow paths that prevent pooling in specific areas, improving distribution evenness without adding mechanical complexity.
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 effectively distributes insect pupae into equal groups faster and more accurately than conventional methods, suitable for sterile insect technique programs, by utilizing the sloped design to constrain and evenly distribute pupae among filter cups, reducing the need for manual counting and singulation systems.
Implementation Method 1
a filter base including a filtering surface; and a cup perimeter wall connected to the filter base and enclosing the filtering surface to define a filter cup volume
Implementation Method 2
at least a portion of the perimeter wall is sloped with respect to the first surface
Data Source
AI summary
An insect dispensing system is described. The insect dispensing system includes a plate diverting structure supported by a frame. A first plate of the structure includes a set of channels and a second plate of the structure includes a set of apertures. The plates are aligned such that one end of each channel is aligned with one of the apertures. A population of insect pupae suspended in a liquid is dispensed into the set of channels via an inlet. As the liquid flows through the system, it is distributed among the set of channels, ultimately exiting via the apertures into a set of catch basins.