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Research Experience during my undergraduate study.pptx
- 2. 目 录 Laser-induced Forward Transfer 1 2 3 4 3D Printed Fan Mobile Robot Based on Raspberry Pi 3B Calculation of HRTF Contents
- 4. Laser-induced Forward Transfer • The main work of the project is the analysis of random deflection characteristics of laser-driven droplet ejection, including: • 1. Matlab simulation and comparison under different conditions, • 2. Fluent simulation comparison of the falling of 5μm diameter copper droplets, printing experiments of 100μm copper cylinders at different printing heights, • 3. single-layer copper surface printing experiments under two printing distances. Droplets follow a Gaussian distribution in the XY direction Fluent simulation results of 20 droplets
- 5. Laser-induced Forward Transfer Experimental equipment Print results of copper cylinders at different height Print results of copper surface under two printing distances
- 7. 3D Printed Fan • For the 3D printing of a simple fan, the following issues should be noted: • 1. The layer-by-layer forming method requires that all parts of the structure have adequate support to prevent collapse or warping. • 2. The angle of inclination relative to the forming direction should not be too large (between 40° and 50°) in case of deformation. • 3. Sharp corner features: Avoid overly fine sharp corner features. • 4. The supporting structure should be easy to remove. the original design the revised design
- 8. 3D Printed Fan Comparison before and after removing supports in horizontal printing Comparison before and after removing supports in vertical printing
- 9. 03 Mobile Robot Based on Raspberry Pi 3B
- 10. Mobile Robot Based on Raspberry Pi 3B • For relatively complex obstacles, design a video monitoring-based obstacle avoidance mobile robot. Build an intelligent car control system based on Raspberry Pi, write the control system program using modular design ideas, and use the materials provided by the experimental center to design a wheeled robot that can drive normally under complex conditions, and conduct test analysis on it. Complex situations include obstacles and specific trajectories. Overall display of the mobile robot Ultrasonic sensor USB camera Battery Infrared sensor Raspberry Pi 3B
- 11. Mobile Robot Based on Raspberry Pi 3B Remote control via VNC Viewer • The main functions implemented are: • 1. Obstacle avoidance using infrared and ultrasonic sensors. • 2. Lane recognition based on OpenCV. • 3. Real-time image transmission. • 4. Basic image recognition based on TensorFlow.
- 13. Calculation of HRTF Aim to directly calculate the Head-Related Transfer Function using modeling and theoretical calculation methods to obtain an HRTF function that conforms to Chinese anthropometric parameters. 1. Constructing a snowman model and calculate based on Collocation Multipole Method. 2. A digital filter model is constructed to simulate sound propagation in the external auditory canal 3. Conducting experimental verification with an artificial head Result at varied frequency
- 14. Calculation of HRTF Experimental equipment Experiment result
- 15. 感谢垂听
Editor's Notes
- 部分结果已经公开可以作为科学研究用途。华南理工大学建立了包括52名受试者的数据库并分析了其特性。发现其与西方人群有差异，中国人样本的平均双耳最大时间差与国外(CIPIC)数据库的统计结果存在着显著性差异。因此建立中国人样本的 HRTF 数据库是必要的, 直接引用国外数据进行中国人双耳听觉的研究可能会出现偏差。不同民族的生理外形、尺寸有一定差别，需要的国外的数据库进行验证是否适用于中国人。