Hall Effect Transducer Assembly with S-Shaped Cutout
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Solution Overview
Problem
Conventional load measurement technologies often have form factors, sizes, or operational configurations that render them ineffective for certain applications, such as measuring forces within a load path in compact or specific geometries.
Innovation Solution
A transducer assembly comprising an engagement plate, a mounting plate with an S-shaped cutout, a support structure, and Hall effect sensor assemblies, which allows for precise measurement of forces by detecting movement of tabs within gaps using magnets and Hall effect sensors, facilitating flexible and accurate force detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional load measurement technologies are used, then measurement capability is provided, but form factor and size limitations render them ineffective for certain applications
Solution Approach 1:
The mounting plate is segmented with an S-shaped cutout that creates finger regions, allowing the structure to be divided into functional zones that accommodate sensors while maintaining structural integrity. This segmentation enables the transducer assembly to adapt to different measurement applications without requiring a complete redesign of the entire mounting structure.
Solution Approach 2:
The design transitions from conventional two-dimensional mounting plates to a three-dimensional structure with tabs extending into gaps created by the S-shaped cutout. This dimensional change allows sensors to be positioned in multiple spatial orientations, increasing adaptability to various load path geometries while maintaining a compact form factor.
2Measurement precision
If strain gauges are used for load measurement, then force detection is achieved, but energy efficiency and cost-effectiveness are reduced
Solution Approach 1:
The design replaces conventional strain gauge mechanisms with Hall effect sensors that detect magnetic field changes caused by tab displacement. This substitution eliminates the need for strain gauge excitation power while maintaining measurement precision, significantly improving energy efficiency without sacrificing force detection accuracy.
Solution Approach 2:
Magnetic fields serve as an intermediary between the mechanical displacement of tabs and the electrical signals generated by Hall effect sensors. This intermediary mechanism allows for passive, energy-efficient measurement where the magnetic field transduces mechanical movement into measurable electrical signals without requiring continuous power input to the sensing elements.
3Measurement precision
If conventional sensor placement methods are used, then force measurement is possible, but interference with the load path occurs
Solution Approach 1:
The sensing elements (Hall effect sensors and magnets) are extracted from the direct load path and positioned in gaps created by the S-shaped cutout. The tabs extend into these gaps to transmit displacement information without requiring the sensors to bear mechanical loads, thereby eliminating load path interference while maintaining measurement precision.
Solution Approach 2:
The tabs serve as intermediaries that transmit mechanical displacement from the load path to the Hall effect sensors positioned in the gaps. This intermediary mechanism allows the sensors to measure force-induced movements without being part of the load path itself, preventing interference with the structural integrity and force flow of the mounting plate.
4Stability of the object's composition
If rigid mounting structures are used, then structural stability is maintained, but flexibility to accommodate loading variations is reduced
Solution Approach 1:
The mounting plate incorporates dynamic elements through the S-shaped cutout and extendable tabs that can deflect and move in response to applied loads. This dynamic design allows the structure to adapt to varying loading conditions and geometries while the overall assembly maintains structural stability through the rigid mounting plate and support structure.
Solution Approach 2:
The design employs thin, flexible tab elements that can bend and deform elastically to accommodate loading variations. These flexible tabs maintain connection between the mounting plate and support structure while allowing relative movement, enabling the structure to adapt to different load magnitudes and directions without compromising overall structural stability.
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 direct and reliable measurement of forces within a load path without interference, offering advantages over strain gauges in terms of ease of placement, energy efficiency, and cost-effectiveness, while allowing for temporary bending to accommodate loading without permanent deformation.
Implementation Method 1
The first sensor assembly comprises a first magnet and a first Hall effect sensor in magnetic proximity to one another
Data Source
AI summary
A transducer assembly includes an engagement plate, a mounting plate, a support structure, and first and second Hall effect sensor assemblies. The mounting plate defines an S-shaped cutout extending through the mounting plate to define first and second finger regions and a perimeter region. The first finger region includes a first distal end spaced from the perimeter region by a first gap defined by the S-shaped cutout. The second finger region includes a second distal end spaced from the perimeter region by a second gap defined by the S-shaped cutout. The support structure includes a base and first and second tabs. The base is sandwiched between the engagement plate and the mounting plate. The first and second tabs extend from the base and into the first and second gaps, respectively. The first and second Hall effect sensor assemblies are configured to detect movement of the first and second tabs, respectively.