Rod Force Transducer Hinge Joint Symmetry
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Solution Overview
Problem
Existing rod-shaped force transducers require costly and time-consuming compensation adjustments to counteract production tolerances and are prone to measurement falsification due to non-coaxial force introduction and transverse forces, leading to inhomogeneous force line distribution and reduced measurement accuracy.
Innovation Solution
A force transducer with a rod-shaped deformation body featuring elongate recesses and indentations arranged symmetrically to create a 'hinge joint' effect, ensuring symmetrical deformation under compression or tension, and a specific surface area ratio that maintains linearity and accuracy without the need for rotational or material compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If rotational compensation is carried out to counteract production tolerances, then measurement precision is improved, but loss of time and increase in device complexity occur
Solution Approach 1:
The deformation body is pre-designed with specific geometric features (elongate recesses and indentations) that automatically compensate for production tolerances and ensure symmetric deformation during operation, eliminating the need for subsequent rotational compensation procedures
Solution Approach 2:
The deformation body structure inherently provides its own compensation for tolerances through its geometric design, allowing the system to self-correct without requiring external compensation devices or procedures
2Measurement precision
If rotational compensation is carried out to counteract production tolerances, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The deformation body is pre-designed with specific geometric features (elongate recesses and indentations) that automatically compensate for production tolerances and ensure symmetric deformation during operation, eliminating the need for subsequent rotational compensation procedures
Solution Approach 2:
The deformation body structure inherently provides its own compensation for tolerances through its geometric design, allowing the system to self-correct without requiring external compensation devices or procedures
3Measurement precision
If force is introduced non-coaxially or transverse forces are applied, then measurement precision deteriorates due to one-sided deformation, but the structure remains simple
Solution Approach 1:
The deformation body incorporates asymmetric geometric features (elongate recesses and indentations) that create a hinge joint effect, enabling the structure to automatically counteract non-coaxial forces and maintain symmetric deformation even when subjected to lateral or transverse loading
Solution Approach 2:
The geometric design of the deformation body pre-establishes counteracting forces through the hinge joint effect, automatically opposing non-coaxial and transverse forces before they can cause harmful one-sided deformation
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 force transducer achieves high linearity and measurement accuracy, being insensitive to interfering forces and eliminating the need for costly compensation measures, while maintaining accuracy across various nominal loads.
Implementation Method 1
a rod-shaped deformation body... in which a longitudinal strain and a transverse strain of a rod-shaped deformation body are detected
Implementation Method 2
elongate recesses and indentations arranged symmetrically to create a 'hinge joint' effect, ensuring symmetrical deformation under compression or tension
Data Source
AI summary
A force transducer for measuring compression and/or tension forces includes a rod-shaped deformation body and at least four strain transducers applied on the deformation body and configured for measuring longitudinal and transverse strains thereof. Front and rear elongate recesses are provided on the front and rear sides of the deformation body in the area of an intersection between a central longitudinal axis and a central transverse axis of the deformation body. Left and right upper indentations and left and right lower indentations are provided on the deformation body respectively at the four quadrants bounded by the axes. A ratio of a cross-section on a center plane extending orthogonally to the central longitudinal axis and including the central transverse axis, to a sum of first and second partial regions of the cross-section, is from 1.56 to 2.15.