Results 251 to 260 of about 325,690 (302)
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Strain-induced magnetoresistance for novel strain sensors
Journal of Applied Physics, 2010The strain-induced magnetoresistance (MR) has been investigated in detail by simulating the spin-rotation in spin-valve structures. The results show that the strain-induced anisotropy can be utilized to control the relative orientation of the spins in the two adjacently arranged ferromagnetic layers because each layer responds to the external strain ...
Xiaoyong Xu +4 more
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2009
In contrast to the fixed strain incorporated in logic devices for a fixed or constant improvement in device performance, piezoresistive strain sensors respond to variable strain through a modulation in the device resistance. The underlying physics of performance improvement in logic devices and strain transduction in piezoresistive strain sensors is ...
Yongke Sun +2 more
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In contrast to the fixed strain incorporated in logic devices for a fixed or constant improvement in device performance, piezoresistive strain sensors respond to variable strain through a modulation in the device resistance. The underlying physics of performance improvement in logic devices and strain transduction in piezoresistive strain sensors is ...
Yongke Sun +2 more
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2009 IEEE International Ultrasonics Symposium, 2009
This paper presents results for a 250MHZ orthogonal frequency coded (OFC) surface acoustic wave (SAW) cantilever device on YZ LiNbO 3 . A 1-D model is presented which predicts the variation in the wave velocity with applied strain. A FEM analysis is conducted which verifies the strain on the cantilever and supports the 1-D model predictions.
Roller, M. +2 more
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This paper presents results for a 250MHZ orthogonal frequency coded (OFC) surface acoustic wave (SAW) cantilever device on YZ LiNbO 3 . A 1-D model is presented which predicts the variation in the wave velocity with applied strain. A FEM analysis is conducted which verifies the strain on the cantilever and supports the 1-D model predictions.
Roller, M. +2 more
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Mechanochromic polyurethane strain sensor
Applied Physics Letters, 2014In this Letter, we study the mechanical and optical response of a thermoplastic polyurethane blended with 0.5 wt. % of bis(benzoxazolyl)stilbene dye. The mechanochromic behavior of the material is characterized in a uniaxial stress-relaxation test by simultaneously acquiring the applied force, mechanical deformation, and fluorescence emission. To offer
F. Cellini +3 more
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Polymer microresonator strain sensors
IEEE Photonics Technology Letters, 2005A new class of fiber-based polymer microresonator strain sensors is analyzed and demonstrated. The flexible sensors are fabricated using a liftoff process and are based on the distortion of the microring by strain and the subsequent shift of the resonant wavelength. For the demonstration, a controlled strain was achieved by flexing the sensor.
B. Bhola +3 more
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Journal of Microelectromechanical Systems, 1996
We examine a new class of sensitive and compact passive strain sensors that utilize a pair of narrow bent beams with an apex at their mid-points. The narrow beams amplify and transform deformations caused by residual stress into opposing displacements of the apices, where vernier scales are positioned to quantify the deformation.
Y.B. Gianchandani, K. Najafi
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We examine a new class of sensitive and compact passive strain sensors that utilize a pair of narrow bent beams with an apex at their mid-points. The narrow beams amplify and transform deformations caused by residual stress into opposing displacements of the apices, where vernier scales are positioned to quantify the deformation.
Y.B. Gianchandani, K. Najafi
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Organic semiconductor strain sensors
63rd Device Research Conference Digest, 2005. DRC '05., 2005In this paper, the authors report the first strain sensors using an organic semiconductor as the active element. The authors have used a doped organic semiconductor as the active element for low Young's modulus strain sensors. The sensor cross-section is shown.
null Soyoun Jung, T. Jackson
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Magnetostrictive Dynamic Strain Sensor
SAE Technical Paper Series, 2001<div class="htmlview paragraph">The Magnetostrictive Dynamic Strain Sensor is a permanent-magnet constant-flux excitation sensor and thus requires no other electrical excitation or power source. It does not require any signal conditioning. Since it is a constant-flux dynamic sensor, it does not generate any offset voltage and it does not exhibit ...
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Polycrystalline silicon strain sensors
Sensors and Actuators, 1985Abstract A new theoretical model for piezoresistance in both n- and p-type polycrystalline silicon is described. This model considers piezoresistance in both the grains and in the Schottky-type barrier regions around the grain boundaries. Transport across the grain boundary is assumed to be dominated by thermionic emission. The effect of strain is to
French, P J, Evans, A G R
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Nonplanar silicon strain sensors
IEEE Technical Digest on Solid-State Sensor and Actuator Workshop, 2003Variations of conventional thin-membrane strain sensors are described which use a series of anisotropic etches ...
R.W. Bower, R.R. Spencer, D.D. Lee
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