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 33 for “"Pressure sensing"”.
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Design of a pressure sensing laparoscopic grasper
… in excessive grasping forces, due to the uneven pressure distribution along the jaws, or slippage when grasping larger organs. Tissue trauma, in the form of mechanical injury (crushing), ischemia (cut off blood supply), or perforation, can occur. A new design uses a symmetric, 10-bar linkage to …
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Dynamic Pressure Sensing for the Flight Test Data System
… data acquisition capability for up to two pressure sensors and an additional three low-frequency pressure sensors. Development of the FTDS-K was separated into a core module, specialized analog subsystem, and practical testing of the FTDS-K in a flow measurement mission. The core module …
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An integrated circuit pressure sensing system with adaptive linearity calibration
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Leading edge vortex detection using bio-inspired on-body pressure sensing
… A NACA 0018 foil was instrumented with four pressure sensors to allow the pressure field near the foil surface to be sampled throughout the foil motions. In addition, PIV techniques were used to image the flow field and verify the presence and location of vortex structures independent of …
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Bio-inspired pressure sensing for active yaw control of underwater vehicles
… which is shown to be competent in estimating the pressure field in the region of interest during motion at constant angles, and during execution of dynamic maneuvers. To solve the inverse problem of estimating the vehicle orientation given specific pressure measurements, an Unscented Kalman Filter …
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Human action interpretation by body pressure sensing with application to a physical assist deveice
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.
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Development of Flexible Pressure and Strain Sensors for Electronic Skin Applications
… ultra-high sensitivity. Development of flexible pressure and strain sensing devices with human-like sensory capabilities has thus been the focus of many studies. Some novel challenging issues brought forth in this area are fabrication of flexible pressure sensors with tunable parameters and high …
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Influence of Compressible Aerogel Electrodes on the Properties of an Electrochemical Cell
… the biomedical field the need for intra organ pressure measurement can only be facilitated by adapting existing pressure sensing technology to the specific tissues under test. The customization of these sensors has only driven up cost and the need to explore new technologies has become …
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Experimental design for study of nucleate boiling in porous structures
… vapor nucleation in sintered porous structures. Pressure sensing was evaluated as an effective means of detecting the onset of nucleation. Thermal studies were conducted with a custom finite difference script in conjunction with finite element analysis. Heat conduction through a three dimensional …
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Fiber optic techniques for remote sensing
… noise immunity has prompted the development of sensing systems based on optical fiber technology. This presentation opens with a short review of fiber optic sensing methods, including a discussion of several devices developed in prominent laboratories. The theoretical and empirical results of a …
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Mechanical and electrical characterization of carbon Black-doped closed-cell Polydimethylsiloxane (PDMS) foam
… Polydimethylsiloxane (CB-PDMS) can be used as a pressure sensing material due to its piezoresistive properties. The sensitivity of such a sensor is in part dependent on the stiffness of the material. A closed-cell CB-PDMS foam is being explored as a possible flexible, lightweight, and waterproof …
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Low Power Adaptive Wireless Circuits for the Internet of Things and In-body implants
… batteryless implantable sensor node for in-body pressure sensing. The node uses a piezoelectric sensor for in-body gastrointestinal (GI) pressure sensing and a loop antenna for wireless power and data communication. The pressure sensor front end, including the front-end amplifiers, achieves an …
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New expressive percussion instruments
… continuous control over rhythm and timbre; pressure sensing; and electronic / acoustic hybrids. These instruments use the tools of electronics and computation to extend the role of percussion by creating new ways for people to play percussion alone, together, and in remote locations. Two …
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Aware surfaces : large-scale, surface-based sensing for new modes of data collection, analysis, and human interaction
… thesis describes the design and construction of pressure sensing matrices for capturing human location and activity data from large surfaces in a space such as the floors, walls, tabletops, countertops, and furniture. With the ability to operate either alone or connected to others in an assembly, …
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Integration of electronic and optical techniques in the design and fabrication of pressure sensors
… systems fabrication methods, piezoresistive pressure sensors have become the more popular pressure transducers. They dominate pressure sensor commercialization due to their high performance, stability and repeatability. However, increasing demand for harsh environment sensing devices has made …
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Tactile sensors based on soft polymers
… makes it the quintessential active material for pressure-sensing skin, the material itself has not been well-characterized electrically or mechanically. A series of mechanical tests on 0.625" cubes of CB/PDMS revealed that the material's resistance increases monotonically with strain and that …
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Understanding human-space suit interaction to prevent injury during extravehicular activity
… The second specific aim is to develop a wearable pressure sensing capability to quantitatively measure areas on the body's surface that the space suit impacts during normal EVA movement. A low-pressure sensing system was designed and constructed for the upper body during dynamic movements inside …
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Multimodal Soft Sensor Design through Single-Material Information Structuring
Human skin provides flexibility, compliance, pressure sensing, temperature sensing, and stimulus localisation while also being able to detect and heal damages. As technologies move towards the design of increasingly general-purpose robots, we require soft sensors which replicate these essential …
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Study of Far Wake of a Surface-Mounted Obstacle Subjected to Turbulent Boundary Layer Flows
… Reynolds number of the flow and manipulating the pressure gradient distributions using a NACA 0012 airfoil placed within the wind tunnel test section. The measurements were acquired utilizing a spanwise traversing boundary layer rake and a point pressure sensing microphone array. The findings …
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Development of clinical assessment strategies for patients undergoing total hip arthroplasty (THA)
… spatial and temporal gait parameters along with pressure distribution and muscle activity measurements done with GAITRite® pressure sensing carpet and KinePro EMG recording device. Parameters involving image processing in Mimics did prove useful as a pre-operative and recovery assessment tools. …
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