Prof.Dr. Junyan Liu

School of Mechatronics Engineering, Harbin Institute of Technology (HIT), People's Republic of China


Prof.Dr. Junyan Liu is a distinguished full professor in the School of Mechatronics Engineering at Harbin Institute of Technology (HIT). With an illustrious career, he serves as the deputy director of the Department of Aeronautics and Astronautics Manufacturing Engineering, while also holding the prestigious position of director at the Center for Advanced Laser Manufacturing & Diffusion Wave Technology. Prof. Junyan Liu is the chairman of QIRT Asia Steering Committee. He is also a committee of the Chinese Society of NDT and deputy director of New Technical Committee on the Chinese Society of NDT. Dr. Junyan Liu is the author and co-author of more than 120 scientific papers in refereed journals and proceedings. He is the co-author of three books. He has more than 18 patents in the area of photothermal or photocarrier imaging, active thermography for non-destructive testing (NDT). Dr. Junyan Liu's research areas are focused on: 1) Photothemal Science and Detection Technologies and Developments of Heat conduction theory and simulation, Signal and Image process, Diffusion thermal-wave imaging detection technologies, 2) Opticalelectrical Diagnosis, Inspection and Monitoring technologies, and 3) Advanced and Intelligence Mechanical Manufacturing technology (e.g. Green machining, Additive Manufacturing/3D printing, Hybrid Manufacturing and Micro/Nano Structure Fabrication Technique).


Photothermal Detection Methods and Their Applications

This talk highlights the latest research endeavors carried out by my lab in the field of photothermal and photoacoustic imaging for Non-Destructive Testing and Evaluation (NDT&E). Various cutting-edge techniques and their applications are discussed, with a focus on thermal wave imaging quality improvement, thermal-wave radar tomography (TWRT), scanning thermal wave imaging, 3D optical measurement and thermography fusion, and defect detection for NDT. The development and application of thermal-wave imaging devices in the aerospace industry are also presented. Additionally, an enhanced photoacoustic spectrum and all-optical photoacoustic imaging are briefly introduced for evaluating polyimide material properties degradation and detecting subsurface defects. The talk concludes with the demonstration of a photothermal microimaging method, showcasing its applications in imaging Au nanoparticles, carbon nanotubes, and magnetism nanoparticles. The collective research efforts of my group are summarized, highlighting recent accomplishments and contributions to the field.