Modular Weighing Unit for Waste Collection Rotary Drum
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Solution Overview
Problem
Existing waste collection systems with cylindrical rotary drums lack an effective and accurate method for weighing waste, as conventional weighing units are not compatible with rotary drum systems and often provide inaccurate measurements due to integration issues with the system's design.
Innovation Solution
A weighing unit designed to fit within the waste collection system, featuring a housing with a complementary shape to the rotary drum, movable flaps driven by a motor unit, and a load cell connected to the base, allowing for accurate weight measurements by aligning with the rotary drum without direct contact and connecting only to the base for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional weighing unit is integrated into a rotary drum waste collection system, then the system can weigh waste, but the measurements become inaccurate due to integration issues with the system's design
Solution Approach 1:
The weighing unit is designed as a separate, modular housing that fits within the waste receiving unit but maintains independent structural support through the base. This segmentation allows the weighing mechanism to be isolated from the rotary drum's movement, preventing integration issues while maintaining measurement accuracy.
Solution Approach 2:
The base serves as an intermediary element that supports both the waste receiving unit and the weighing unit. By connecting the load cell to the base rather than directly to the rotary drum or housing, the system isolates the weighing mechanism from the dynamic movements of the rotary drum, ensuring accurate measurements without complex integration.
2Measurement precision
If the housing is made to fit closely within the waste receiving unit to direct all waste into the weighing unit, then measurement accuracy improves, but the risk of external interference and damage during emptying operations increases
Solution Approach 1:
The housing is designed to nest within the waste receiving unit with a complementary shape that follows the rotary drum's contour. This nested configuration ensures all waste falling from the rotary drum is captured by the housing and directed to the weighing mechanism, improving measurement accuracy while the base provides protective support.
Solution Approach 2:
The base provides structural support and cushioning for the weighing unit before damage can occur during emptying operations. The load cell is connected to the base, which acts as a protective element that absorbs shocks and prevents direct transmission of harmful forces to the sensitive weighing mechanism during crane operations and emptying.
3Stability of the object's composition
If the weighing unit connects only to the base for stability, then measurement stability improves, but the complexity of ensuring proper alignment with the rotary drum increases
Solution Approach 1:
The housing is designed with a complementary shape to the rotary drum that creates a natural alignment interface. By shaping the housing to follow the drum's contour, the system achieves proper alignment through geometric compatibility rather than complex adjustment mechanisms, maintaining measurement stability while simplifying the alignment process.
Solution Approach 2:
The housing's complementary shape is specifically designed to match the asymmetric geometry of the rotary drum and waste receiving unit. This asymmetric design ensures that the housing automatically aligns with the rotary drum in the correct position, providing stable measurements while the connection to the base ensures structural stability during weighing.
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
Enables precise and reliable waste weighing by ensuring all waste is directed into the weighing unit, preventing external interference and providing stable measurements, while also protecting the unit during system operations like emptying.
Implementation Method 1
a load cell connecting the housing to the frame
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A waste collection system (10) comprises a base (14), a collection unit (16) beneath the base (14) for storing waste, a waste receiving unit (12) supported on top of the base (14) and comprising a cylindrical rotary drum (18) for receiving the waste; and a weighing unit (20). The weighing unit (20) comprises a housing (22) defining a collection chute for receiving waste from the rotary drum (18); one or more movable flaps (34) connected to the housing (22), moveable to a closed position for weighing waste and an open position to allow waste through the housing (22) to the collection unit (16); a frame (40) for connecting the weighing unit (20) to the waste collection system base (14); and a load cell (42) connecting the housing (22) to the frame (40). The housing (22) is configured to fit within the waste receiving unit (12) and comprises a top portion (30) complementary in shape to the rotary drum (18) such that the top portion (30) aligns close to but not connecting to the rotary drum (18).