Search for dissertations about: "ultrasonic transducer"
Showing result 1 - 5 of 29 swedish dissertations containing the words ultrasonic transducer.
-
1. Ultrasonic Fluid and Cell Manipulation
Abstract : During the last decade, ultrasonic manipulation has matured into an important tool with a wide range of applications, from fundamental cell biological research to clinical and industrial implementations. The contactless nature of ultrasound makes it possible to manipulate living cells in a gentle way, e.g. READ MORE
-
2. Maximum a posteriori deconvulution of ultrasonic data with applications in nondestructive testing : Multiple transducer and robustness is
Abstract : In the thesis, various aspects of deconvolution of ultrasonic pulse-echo signals in nondestructive testing are treated. The deconvolution problem is formulated as estimation of a reflection sequence which is the impulse characteristic of the inspected object and the estimation is performed using either maximum a posteriori (MAP) or linear minimum mean square error (MMSE) estimators. READ MORE
-
3. Non-destructive measurement of near-surface cracks in railheads : with focus on ultrasonic inspections
Abstract : Near-surface cracks in railhead that caused by rolling contact fatigue (RCF) is one of a kind rail defects that degrade rail track quality. Dependent on the trail load, the cracks can reach to severe level quickly. READ MORE
-
4. Modeling of Scattering by Cracks in Anisotropic Solids - Application to Ultrasonic Detection
Abstract : Elastodynamic wave scattering in anisotropic solids with application to ultrasonic nondestructive testing (NDT) is treated and mathematically modeled in this thesis. The scatterers are infinite strip-like cracks and the solids are homogeneous and linearly elastic with negligible damping. READ MORE
-
5. Borrowing the Bat's Ear for Automation - Ultrasonic Measurements in an Industrial Environment
Abstract : This work focuses on measurement principles based on ultrasound for applications in industrial automation. The measurements made are of geometric nature. The methods used are when possible based on experience and/or inspiration from the study of bats. READ MORE