Global ETD Search
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Showing 1 to 19 of 19 for “"Wheatstone bridge"”.
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Zinc Oxide Nanorod Based Ultraviolet Detectors with Wheatstone Bridge Design
… based ultra-violet (UV) detectors having a Wheatstone bridge design with a high</p> <p>responsivity at room temperature and above, as well as a responsivity that was largely independent of the change in ambient conditions. The ZnO nanorods which acted as the sensing element of the detector …
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Field induced switching in multilayer rhombic magnetic rings
… contact configurations known as "classical" and "wheatstone bridge" provide additional information on interactions that are occurring within the structures. It was found that both contact configurations were sensitive to similar changes in the devices, however, through different means of sensing. …
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Development and characterization of an impedance-based carbon sensor for the detection of catalyst coking in steam-methane and dry-methane reforming systems
… environments. The sensor comprises of a Wheatstone bridge with two catalytic, non-percolating cermet resistive elements printed using an inkjet printer. As carbon begins to grow on the catalytic surface, the electrical conductivity of the catalytic material increases, which results in a …
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Piezoresistive Sensing of Bistable Micro Mechansim State
… mechanism was then integrated into various Wheatstone bridge configurations to show the advantages of bridges and to demonstrate various design layouts. Repeatable and detectable results were found with independent mechanisms and with those integrated into Wheatstone bridges. Finite element …
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Design and analysis of diagnostic machines utilizing compliant mechanisms
… as torque sensors. Strain gages are placed in a Wheatstone bridge circuit to mitigate environmental factors. Trials measured torque of the right ankle joint of test subjects from a standing position. Results show that the coupling of the two modes of ankle joint rotation …
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Neutron dosimetry with a water calorimeter
… by a thermistor which was incorporated in a Wheatstone bridge circuit. The merits of different configurations of bridge circuit are discussed and the literature on the subject is reviewed. The circuit employed was an AC bridge having asymmetric, inductive ratio arms. The output of the bridge …
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Design of Gages for Direct Skin Friction Measurements in Complex Turbulent Flows with Shock Impingement Compensation
… pressure as a source of output voltage. Two Wheatstone bridge configurations were developed to minimize temperature effects first from temperature gradient and then from spatially varying heat flux induced gradient. An inertia limiting technique was developed that parametrically investigated …
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The Properties of Grain Boundaries in YBa2Cu3O7-d
… than that of the grain boundary, a compensating Wheatstone bridge structure was used. The errors involved in this technique are carefully assessed and quanti ed. The normal state resistance of a number of di erent grain boundary orientations was measured from room temperature to the critical …
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Overcoming Thermal Challenges to Acquire Absolute Pressure Measurements in Rotating Detonation Engines Using Piezoresistive Pressure Transducers
… a pressure rating of 20 MPa is implemented. The Wheatstone bridge with a 5th-wire circuit and related analysis procedures are introduced to measure the probe temperature simultaneously with pressure measurements. The sensor calibration is performed to obtain correlation between (a) sensor …
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Development of portable escherichia coli bacteria detection using resistive graphene-based immunosensor
… to detect resistance change with the help of Wheatstone bridge for device calibration. Results show that resistivity change that can be detected by the device was as low as 0.0426 Ω. For E. coli bacteria detection, the system has a linear relationship between the device reading and the …
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The Testing and Verification of a Nanomembrane Based Pressure Sensor for Small-Scale Underwater Pressure Measurements
… consists of four piezoresistive elements in a Wheatstone Bridge configuration arranged on a deformable buried-oxide layer, which is then bonded to a Silicon base layer with a hollow cavity carved using reactive-ion etching. Previous work has shown the survivability of these sensors in an …
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Size Measurement of Fine Sediments By Electrical Resistance
… circuit as one of the resistances of a Wheatstone Bridge. A decade box was used as a balancing resistance and the point of balance was determined with an oscilloscope. Filling the cylinder with distilled water and introducing the sediments caused an unbalance in the bridge which was …
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Bridge to digital converters for environmental monitoring in edge IoT devices
… environmental monitoring edge IoT devices. The Wheatstone bridge (WhB), which is the conventional architecture for interfacing with resistive-based sensors, typically produces a mV-level differential signal that needs to be detected in a higher common-mode voltage. This presents particular …
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Biomedical sensor for transcutaneous oxygen measurements using thick film technology
… feedback temperature sensor was employed for the wheatstone bridge circuit configuration to regulate the transcutaneous temperature. In addition, the oxygen sensing module included studies on the effectiveness of using Nafion polyelectrolytes to achieve amperometric measurements for transcutaneous …
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Modeling and Control of Surface Micromachined Thermal Actuators
… electrically connected to the sensing legs in a Wheatstone bridge configuration. An excitation voltage is applied to the bridge, and as the sensing legs deflect with the center shuttle displacement, the resistance change across the legs can be determined by measuring the voltage across the …
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Integration of electronic and optical techniques in the design and fabrication of pressure sensors
… set into the diaphragm. They were connected in a Wheatstone bridge configuration for detecting strain-dependent changes in resistance induced by diaphragm deflection. In the optical part of the sensor, an optical cavity was formed between the embossed surface of the diaphragm and the end face of a …
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Advancing Multi-Axis Force/Torque Sensing via Beam Optimization, Self-Decoupling Mechanisms, and Morphing-Based Mechanical Intelligence
… embedded piezoresistive films and a modified Wheatstone-bridge interface. This compact, volume-efficient design eliminates the need for a rigid frame, confines deformation to the free-end beams, and maximizes strain utilization. Symmetric placement of the sensing films combined with the …
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EMI Noise Reduction Techniques for High Frequency Power Converters
… has more loss. The balance technique forms a Wheatstone bridge circuit to minimize the CM noise. However, the balance technique cannot achieve very good attenuation at high frequency due to parasitics. Shielding technique is very popular in isolated DC-DC converters to reduce CM noise. …
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Skin Friction Sensor Design Methodology and Validation for High-Speed, High-Enthalpy Flow Applications
… metal-foil strain gauges are arranged in a Wheatstone bridge configuration to increase sensitivity and to provide further compensation for sensitivity effects. The sensor is actively cooled via a copper water channel to minimize the temperature gradient across the electronic systems. The …