Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 62 for “"Force sensors"”.
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Molecular Force Sensors. Molecular insights into mechanochemical signal conversion
Contains fulltext : 149859.pdf (Publisher’s version ) (Open Access)
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Conformable and robust microfluidic force sensors for orthopaedic surgery
Quantitative force feedback for orthopaedic surgeons is crucial for the accurate positioning of implants during total hip and knee arthroplasty (THA and TKA respectively). During the trial stage of THA, the surgeon manually determines the implant size, positioning, and range of joint motion of the …
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Smart material composites for magnetic field and force sensors
Piezoelectric material based sensors are widely used in applications such as automobiles, aircraft, and industrial systems. In past decade, attention has been focused on synthesizing composites that can provide multifunctional properties, i.e., same material exhibits two or more properties. In this …
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Real-time membrane puncture detection using force sensors for micro-injections in phantoms
… Institute was revised to implement closed-loop force feedback to compensate for tissue deformation during micro-interventions. Force sensors can detect puncture events as the needle penetrates tissue membranes, thereby reducing damage to surrounding tissues by preventing the needle from …
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Development and Application of a Portable System to Reliably Measure Grip Forces Using Thin-Film Force Sensors
<p>Accurate tracking of hand grip force is an important consideration needed for a robust understanding in the study of human biomechanics. One aspect where it proves useful is in hand-arm vibration, such as from gripping a power tool. Depending on how firmly the user is gripping the tool, they may …
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Design principles of multi-axis, large magnitude force sensors based on stress fields for use in human and robotic locomotion
… structures, incapable of handling large impact forces and noise caused by inertial loads during stride). This research is a study of how best to replicate the role of skin mechanoreceptors that enable our biological counterparts to perform dynamic maneuvers, and to develop innovative sensors …
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Effects of geometry on compliant, stress field force sensor characteristics
… geometries for compliant, stress field (SF) force sensors. The goal of exploring these different sensor designs is to begin identification of the geometric properties of SF force sensors that are most optimal for certain loading conditions. This work prioritizes robotic locomotion as the …
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Behavior-specific proprioception models for robotic force estimation
… in physically demanding tasks require accurate force sensing capabilities. A common way to achieve this is by monitoring the interaction with the environment directly with dedicated force sensors. Major drawbacks of such special purpose sensors are the increased costs and the reduced payload of …
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Micromachined Sensors and Their Applications in the Study of Mechanical Response of Single Living Cells
Both the one- and two-component force sensors have been used to study the mechanobiological response of fibroblasts, endothelial cells, and neurons. The major findings of the studies include: The force response of monkey kidney fibroblasts is strongly linear, reversible and repeatable under large …
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Design of a Testbed for Haptic Sensor Calibration and Characterization
… the characterization and calibration of haptic force sensors. This test bed can apply and measure contact forces up to 10N anywhere within a 60x60x60mm volume, at angles up to ±10 degrees from the normal. A procedure for haptic sensor calibration and characterization was developed for this test …
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SCALE : exploring human-object interaction through force vector measurement
… Interaction through the real-time analysis of force vector signals, which I have defined as "Force-based Interaction" in this thesis. Force conveys fundamental information in Force-based Interaction, including force intensity, its direction, and object weight - information otherwise difficult …
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Development of a novel micropipette aspiration-based force sensing technique to measure single cell sliding friction
… the cells’ curvature. The presence of tangential force component (or the sliding friction) and the recruitments of auxiliary stress-dependent ligands at the adhesion site mean conventional cell detachment model is not adequate to explain the rupture mechanics of a sliding cell. Thus, we propose an …
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Bi-modal hemispherical sensors for three axis force and contact angle measurement
… able to accurately measure contact locations and forces. However, many existing sensors do not satisfy the stringent requirements or do not supply sufficient information for robotic locomotion and manipulation. This thesis builds on work by a previous PhD student, Meng Yee (Michael) Chuah, of the …
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Current-based force input / output control for novel haptic interaction using the inFORCE shape display
… of higher dimensions of the data. We propose inFORCE as an extension upon current generation shape displays. inFORCE is a force-responsive shape display with the ability for force input and output. This force-responsive capability opens up novel and exciting methods of haptic interaction. We …
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Vision Based Surgical Tool Tracking with Robot Kinematics Prior
… surgery, the lack of realistic and real-time force feedback is a major drawback --- discerning tool-tissue interactions can be unintuitive and can ultimately result in unintentional tissue damage. Directly sensing forces at the tool-tissue interface is theoretically possible using tool tip …
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Robotic Work-Space Sensing and Control
… using only the internal joint position sensors, in a sense leaving the robot blind and numb. Using external sensors, such as cameras and force sensors, allows the robot to detect the existence and position of objects in an unstructured environment, and to handle contact situations not …
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Cost-Effective Prosthetic Hand Controlled by EMG
… signals, which are obtained from the human body. Force sensors are used to control required forces needed to grasp and pick objects. A prototype hand is developed and it is experimentally tested to reproduce a wide spectrum of human hand motions. The size of the five-finger hand is similar to an …
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Vzťah medzi vybranými laboratórnymi a terénnymi indikátormi pohybových predpokladov u futbalistov
… belt (Cosmos, Germany). Dynamic application of force to the pad was evaluated by force sensors in stable Kistler 9281E platforms (© 2014, Kistler Group, Switzerland). Linear acceleration and maximum run speed tests were conducted in field conditions on artificial grass. Results: The results of …
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Robust proprioceptive grasping with a soft robot hand
… modules. The finger module includes resistive force sensors on the fingertips for contact detection and resistive bend sensors for measuring the curvature profile of the finger. The curvature sensors can be used to estimate the contact geometry and thus to distinguish between a set of grasped …
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