Papers by Author: Su Min Yin

Abstract: A new system for testing the resistance of keys of keyboard was designed based on the embedded motion controller. Hardware design and software design of the system were accomplished. According to the system requirements, the embedded controller (GUC-400-EPV-ML-M01-L2) was chosen as the control center of the hardware system. The implement of system software was based on Visual C++ 6.0 programming platform by using C++ language. The qualified boundary values about the resistance of keys can be adjusted by means of keyboard input. Collecting data, processing data and statistics of data automatically were achieved. Examining results can be displayed through the human machine interface which was designed on the windows platform based on VC++ 6.0. The whole testing system is proved to satisfy the desire of industrial manufacture, which is excellent in the reliability and the anti-interference ability. It has a promising market prospect and really deserves to be spread.

Abstract: According to the principle of manganese powder forming, a battery online weighing system with PLC-based PID-Fuzzy control algorithm was designed. In this paper, we focus on the need for a detailed description of hardware and software and matlab simulation of the system. The system uses touch screen for realization of human-machine interaction with high stability, and double closed-loop controls overcome the disadvantages of the traditional offline open-loop control, those greatly improve the efficiency and accuracy of manganese ring weighing.

Abstract: The marking system by laser shock wave (LSW) based on liquid crystal mask, which differs entirely from marking by laser ablation (or laser thermal effect), was established. Two-dimension (2D) nondestructive markings based on liquid crystal mask were prepared by LSW, and the distribution of residual stresses in laser-shocked region was measured and analyzed. The results showed that tensile residual stresses of sample surface were converted into compressive residual stresses by LSW, which is a nondestructive marking for aviation key parts.

Abstract: The theoretical researches on fabrication, measurement and identification of laser marking system of 3D(three-dimension) anti-counterfeiting identifiers have been done in this paper. 3D identifiers were fabricated and 3D identifiers’ modelings were reconstructed, and binary coding of gray images were encoded by programmable control of liquid crystal mask, spatial modulating of laser beam and photolithography fabrication technics. We regarded the depth of 3D identifiers as anti-counterfeiting information, and the original marking data and anti-counterfeiting information are saved in remote database server by database technology and computer network technology，so true produces can be distinguished from fake through network. The basic theory of 3D nondestructive anti-counterfeiting identifiers based on liquid crystal mask was built, and a new technology of creating 3D anti-counterfeiting identifiers by laser shock wave was set up, which differs entirely from marking by laser ablation (or laser thermal effect). A new high-efficiency theory of detecting and identifying on 3D anti-counterfeiting identifiers by 3D identifiers’ reconstruction and binary coding was set up. The study enriches dynamic plastic deformation theory of partial high-strain-rate and anti-counterfeiting design & manufacturing theory which is also a highlight based on advanced manufacturing theory of mechanical effect on laser shock wave.

Abstract: In terms of the principle and characteristics, this paper proposes a new method to implement laser shock forming for large region based on the STL model. The method allows the build-up of laser shocking track to be accomplished automatically and therefore resolves the problem of continuous machining in course of the laser shock.

Abstract: For the characteristics of soft X-ray stress testing technology, a formula to resolve main residual stress is deduced based on analyzing the relationship between main residual stress and normal stress of different sections. The distribution of main stress of laser shock forming TA2 metal sheet is studied combined with the experimental study on the determining residual stress with soft X ray diffraction analyzer. The result shows that testing and calculating main residual stress is an important approach to study the deformation law of sheet metal material.