This paper develops a CO2 laser camera by using an ARM embedded system with a CCD camera. The power controller, embedded on an FPGA chip, controls laser cutting depth by modifying the DPWM power controller for a CO2 l...
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ISBN:
(纸本)9783037856512
This paper develops a CO2 laser camera by using an ARM embedded system with a CCD camera. The power controller, embedded on an FPGA chip, controls laser cutting depth by modifying the DPWM power controller for a CO2 laser machine. The relationship model between feed rate, laser power and cutting depth was trained by the adaptive neural fuzzy inference system (ANFIS). Laser power output was determined by the grayscale level in the image from CCD camera to reproduce a bitmap image in a 2.5D engraving. The maximum laser cutting depth was 4mm, and the feed rate varied between lOmm/s and 80 mm/s. Laser power was less than 48W. The precision for the cutting depth in the model was less than 0.036mm. The precision for the actual cutting depth of the laser was within 0.044mm. Implementation of the model improved the precision of the laser cutting machine to within the range +/- 0.05mm.
Rolling contact fatigue tests of 20mm-diameter 13Cr-2Ni-2Mo stainless steel bars was carried out using a newly developed single-ball system. The bars were quenched by induction heating method and after that tempered. ...
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ISBN:
(纸本)9783037856512
Rolling contact fatigue tests of 20mm-diameter 13Cr-2Ni-2Mo stainless steel bars was carried out using a newly developed single-ball system. The bars were quenched by induction heating method and after that tempered. Sectional observations of the subsurface cracks were made after the surface layer separations. Based on the observations, stress analysis was performed in order to investigate the relation between flaking failures and subsurface crack growth. From these calculations it was found that the shear stress propagated subsurface cracks and finally caused the flaking failures. Furthermore, eight specimens were fatigue tested and Weibull statics distribution of RCF life were calculated using Johnson's statistical method. It was found that the basic life (L-10) of the bars under 5.3GPa Hertzian stress was 8.33 X 10(6) cycles.
The flammable vapor pressure inside the combustible liquid storage tanks in the fire environment elevates, and the of the tank wall the yield strength of enduring the heat decreases, which cause the collapse to occur ...
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ISBN:
(纸本)9783037856512
The flammable vapor pressure inside the combustible liquid storage tanks in the fire environment elevates, and the of the tank wall the yield strength of enduring the heat decreases, which cause the collapse to occur soon, resulting in the happen of BLEVE. BLEVE is an incident form of great harm, and the study of its formation mechanism and hazard model is of great significance for the safety of the chemical enterprise. In this paper, the physical and chemical characteristic of dichloropropane and BLEVE in a dichloropropane tank area is analyzed, and the accident analysis model is built. According to TNT equivalent method, the vapor cloud fire and explosion models and the blast wave overpressure injury criteria, we calculated the accident consequence of BLEVE in different filling levels. The calculation and analysis shows that, if the BLEVE occurred, the entire tank area and adjacent buildings will be severely affected and the affect area will be up to 50.35 meter;the people less than 7.43 meter from the explosion tank will be subject to serious injury or death. Based on the above substance hazardous characteristics analysis in dichloro propane tank storage area and the corresponding qualitative and quantitative analysis, and according to the relevant requirements of the specification, the fire safety prevention and control measures in the tank area should be further strengthened.
The proceedings contain 326 papers. The special focus in this conference is on Manufacturing Technology and Processing, mechatronics and Automation, mechatronics and Embedded System Applications, applied Mechanics and...
ISBN:
(纸本)9783037856512
The proceedings contain 326 papers. The special focus in this conference is on Manufacturing Technology and Processing, mechatronics and Automation, mechatronics and Embedded System Applications, applied Mechanics and Other topics. The topics include: The sequence injection analysis of automobile air inlet grille plastic part;effect of end of injection angle on performance and emission formation for a gasoline engine;development of hydraulic oil-fired deicing system for aircraft deicing vehicle;aerodynamic characteristics analysis of high-speed train on cutting under crosswinds;research of chaotic phenomenon for a synchronous reluctance motor;CMMI based system software process for industrial manufacturing system;a knowledge based approach for product variant design;single-row facility layout based on manufacturing costs;experimental study of atomization characteristic of air blast atomizer;short-term wind speed forecasting based on optimizated support vector machine;the simulation analysis of a micro electromagnetic harvester based on vibration energy;finite element simulation of the artificial knee-joints of similar type pairing;new collaboration between engineer and product feature generation in industrial PLM systems;the research and development of VB and solidworks-based 3D fixture component library;multiple momentum term BP algorithm and its application in hot rolling AGC system;the research on traction simulation for a new hybrid power train;implementation of a high-precision ultrasonic rain gauge;three-dimensional structure trajectory guiding scan and points cloud registration;research on real-time vision detection method for sanitary labels;robot fish with novel wire-driven continuum flapping propulsor;the design of permanent magnetic adhesion system for wall-climbing robot;dynamic license plate localization for vehicles on multi-lane using single camera;research on wavelet compression and reconstruction of wind turbine vibration signal;axial deformation of
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