The design and development of a high-speed digital imaging system /
a test and a photoelastic compression specimen. The next
| Main Author: | |
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1994.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | a test and a photoelastic compression specimen. The next are reviewed first, followed by a discussion of the essential arrangement and interaction between the system components is can be captured. The second main design function required concerning the further work needed to make the system fully conditions. The first main design requirement for the system developed utilizes an acousto-optic deflector, or Bragg cell, device cameras and a frame grabber to capture the images. elements of the new system. A detailed description of the evaluation phase involved grid capturing dynamic images of experiment image enhancement and processing to be performed. experimental mechanics events. Optical imaging ' valuable experiments that have been performed. Finally, some comments full-field information about the stresses and displacements full, undisturbed gray-scale information and allow post- images. The high-speed digital imaging system that has been imaging system is a for optically recording dynamic in order to avoid streaking of the images. Also, variable interframe times ranging from two to one hundred microseconds its light source and uses a combination of charge-injection obtained. Finally, the recording medium had to preserve operational are provided. recording system and the characteristics of existing systems specimen. The essential requirements for any high-speed that adequate spatial separation of each of the images be The goal of this research was to develop a high-speed digital the stress waves travelling through a photoelastic impact The system was first evaluated by capturing static images of then presented, followed by the results from the evaluation This last requirement translated into digital storage of the to accomplish the necessary spatial separation of the images to be captured. The system employs a pulsed argon laser for tool in the field of experimental mechanics because it yields was to have an exposure time of less than fifty nanoseconds were required so that an appropriate time window of the event which develop in a material under steady-state or transient |
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| Item Description: | "Major subject: Mechanical Engineering". Vita. |
| Physical Description: | xiii, 115 leaves : illustrations ; 28 cm. Also available online. |
| Bibliography: | Includes bibliographical references. |