Force Transducer with Double Bending Beams for Precision Measurement
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Solution Overview
Problem
Existing force transducers are limited in their ability to simultaneously measure multiple force components from different directions, leading to reduced measurement accuracy and precision in force detection.
Innovation Solution
A force transducer composed of multiple double bending beams connected in series, with strain gauges arranged on each beam to measure forces in orthogonal directions, allowing for precise detection of forces in three-dimensional space, and a monolithic design for compactness and ease of manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple force components are measured simultaneously using multiple separate transducers, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple force measurement functions into a single integrated transducer assembly. Multiple double bending beams are connected in series to form one unified device that can simultaneously measure multiple force components (Fx, Fy, Fz) that would otherwise require separate transducers, thereby reducing overall system complexity while maintaining measurement precision
Solution Approach 2:
The force transducer is designed as a multi-functional device capable of measuring force components in multiple directions simultaneously. The series connection of double bending beams enables the single transducer to perform the work of multiple separate transducers, achieving universal measurement capability across different force vectors
2Measurement precision
If strain gauges are exposed for force measurement, then measurement accuracy is improved, but reliability decreases due to strain gauge damage
Solution Approach 1:
The patent employs a protective film or coating that covers the strain gauges while allowing them to function. This protective layer shields the fragile strain gauges from mechanical damage and environmental factors, preventing damage that would compromise reliability, while still enabling accurate force measurement through the protective medium
3Manufacturing precision
If multiple double bending beams are connected with pins and bores, then manufacturing precision is improved, but ease of manufacture decreases
Solution Approach 1:
The patent integrates the connection features (pins and bores) directly into the monolithic structure during manufacturing. Rather than assembling separate components with pins and bores, the double bending beams are formed as an integrated unit with built-in connection elements, simplifying the manufacturing process while maintaining the precision required for accurate force transmission
4Volume of moving object
If force transducer size is reduced for compactness, then ease of operation is improved, but measurement precision may deteriorate
Solution Approach 1:
The patent arranges multiple double bending beams in a nested or compact series configuration. The beams are connected in series along a compact path, allowing the transducer to maintain adequate measurement dimensions while occupying less overall volume. This nested arrangement enables precise force measurement without requiring a large transducer footprint
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
Enhances measurement accuracy and precision by enabling simultaneous recording of multiple force components, improving the detection of force direction and reducing the size of the transducer, while protecting strain gauges and simplifying connections.
Implementation Method 1
a first strain gauge pair, wherein the strain gauges of the first strain gauge pair are arranged on the first double bending beam, a second strain gauge pair, wherein the strain gauges of the second strain gauge pair are arranged on bending beams of the two second double bending beams
Implementation Method 2
The force transducer comprises a bending body designed as a double bending beam with strain gauges arranged on it. The bending body also has two end pieces on its two opposing end faces
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3
AI summary
Devices and methods for measuring forces, in particular wheel forces, are shown using a force transducer constructed from double bending beams, which transmits forces acting on a component connected to the force transducer to another component.