首页|Patent Issued for Axial force sensor assembly, robot gripper and robot (USPTO 12 151362)
Patent Issued for Axial force sensor assembly, robot gripper and robot (USPTO 12 151362)
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The following quote was obtained by the news editors from the background informa tion supplied by theinventors: “Existing force sensors mostly use strain gauges to detect the local strain of a deformed structureunder loads. These sensors u se contact-based, resistive strain transducers attached to the deformable structure to detect the deformation of the structures based on the resistance change o f a resistor. However,the deformable structures are intrinsically sensitive to temperature variations, contact bonding materials,complex strains in all direct ions, stress concentrations, and impacting loads, etc. Non-contact-based forces ensors use capacitive, inductive, or optical transducers to pick up global displ acements due to structuraldeformations under loads, thus eliminating some drawb acks of strain gauge sensors related to the resistivesensing, local stress and bonding issues. However, most of the non-contact-based force sensors can be susceptive to sensing noise caused by off-axis loads, because it is difficult to mak e a structure that can onlydeform under a certain load (e.g. axial force) but v ery resistant to other loads (e.g. bending moment).”
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