| Micro-/nano-experimental mechanics detection technology is the key factor to restrict this discipline to develop in depth, and the development of new micro-/nano-experimental mechanics testing is very meaningful. With the advantage of high energy, short wave length, penetrating ability, X-ray is a powerful tool for non-destructive and high-resolution observations. With the completion of China’s third-generation synchrotron radiation source in Shanghai, applying synchrotron radiation X-ray in scientific experiments and researches has become a reality. Combined with CT technology, three-dimensional observations can be achieved. Compared with the traditional detection techniques, synchrotron radiation CT technology can achieve non-destructive, real-time, three-dimensional observations. In this paper, building a micro-/nano-mechanics synchrotron radiation experimental platform is the main study contents. The platform software, hardware, design principles, goals were discussed in detail. We mainly focused on platform software algorithms to solve practical problems encountered in the real experiments. Specifically, we faced space issues and time issues. We discussed the causes of the problems, the impact of these problems, and then proposed new algorithms to solve the problems. Finally we testify the new proposed algorithms for authentication with experiment. The main contents are as follows:1. The importance of the micro-/nano-experimental mechanics was discussion. The existing micro-/nano-mechanical testing techniques were analyzed. We proposed that synchrotron radiation CT technology is ideally suitable for micro-/nano-experimental mechanics researches. We discussed the necessity for building a micro-/nano-mechanics synchrotron radiation experiment platform. Platform building requires hardware and software to solve the basic problems. Firstly, we introduced hardware equipments of the platform. Then, the basic theory of synchrotron radiation CT reconstruction was introduced, and we discussed the most common reconstruction algorithm-filtered back projection (FBP) algorithm. Combined with the actual experimental conditions, we proposed a new filter function. Finally, we proposed a new solution of CT image reconstruction.2. We discussed the time issues of building the platform. We categorize the time problems, and elaborated the importance of time issues. We propose inversion projection method and GPU parallel computing method to solve the time issues.3. The space issues of building the platform were discussed. We introduced two kinds of space issues that we have to face:small field of view issue and data incomplete issue. We discussed the causes of the problem, the influences, and solutions. The Hilbert local tomography algorithm and wavelet local tomography algorithm were applied to solve the small field of view issue, and we proposed SIRT-FBP hybrid algorithm to solve data incomplete issue. |
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