Monolithic Weighing Sensor with Load Receiver Stop
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Solution Overview
Problem
Existing rotary filling head weighing sensors face limitations due to their cuboid housing, which restricts their installation in circular arrangements, leading to increased waste and limited weight measurement ranges, as well as issues with settling time and deflection under load, especially when using DMS weighing cells.
Innovation Solution
A monolithic weighing sensor with a compact, space-saving design featuring a load receiver stop for the force converting mechanism, eliminating the need for additional stop components and enhancing force conversion ratios, allowing for a more efficient and accurate weight measurement in circular configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If weighing cells with cuboid housing are used, then the housing provides structural support, but the smallest possible divided circle diameter is strongly limited
Solution Approach 1:
The weighing cell is divided into separate functional units: a load receiver unit and a magnet unit, which can be independently positioned. This segmentation allows the load receiver to be compact while the magnet unit provides structural support at a different location, enabling smaller circle diameters.
Solution Approach 2:
The magnet unit is positioned in a different spatial dimension (offset from the load receiver plane) rather than directly supporting it from below. This dimensional rearrangement allows the load receiver to have a compact footprint suitable for small circle diameters while the magnet unit maintains structural integrity.
2Measurement precision
If DMS weighing cells are used, then weight measurement is achieved, but the settling time is long and deflection under load occurs
Solution Approach 1:
The problematic elastic linkages and parallelogram guidance with long settling times are removed. Instead, a direct rigid connection is used between the load receiver and the force-converting mechanism, eliminating the settling delay while maintaining measurement capability.
Solution Approach 2:
The complex mechanical guidance system (parallelogram linkage with elastic elements) is replaced with a simpler direct mechanical connection. This substitution reduces the system's degrees of freedom and eliminates the settling time associated with elastic deformation.
3Force
If force-converting linkages are used, then force conversion is achieved, but the magnitude of applied force is reduced
Solution Approach 1:
Instead of using linkages that reduce force magnitude through mechanical advantage, the design inverts the approach by using a direct connection that preserves force magnitude. The force-converting function is achieved through the geometric arrangement of the lever arms rather than through force-reducing linkages.
4Manufacturing precision
If monolithic construction is used, then manufacturing precision is improved, but the design flexibility is reduced
Solution Approach 1:
While maintaining overall monolithic construction for precision, the design segments the functional units (load receiver, magnet unit, force-converting mechanism) that can be independently designed and positioned. This allows flexibility in arranging these units to optimize for different applications while maintaining manufacturing precision through monolithic fabrication.
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 enables a more compact and torsion-resistant weighing sensor with improved force conversion, reducing waste and increasing the weight range capabilities while maintaining high measurement accuracy, even under eccentric force introduction.
Implementation Method 1
the weighing sensor (1) is to be used in an electronic scale according to the principle of electromagnetic force compensation
Data Source
AI summary
A weighing sensor according to the principle of electromagnetic force compensation, wherein a stop is provided on the load receiver for a lever or a component carried by it.