Applied Mechanics and Materials Vol. 487

Abstract: Digital fringe projection technique using phase shifting method has been studied extensively for generatingthree dimensional (3D) surface information. The aim of this paper is to develop a simple automated optical inspection (AOI) system using fringe projection technique to capture image of an object. A three step phase shifting is used to generate the saw tooth image to retrieve the information of the pixel coordinate and surface dimension. The calibration of the camera and projector is observed to contribute a great significant on the measurement accuracy. The developed system is capable to measure the object surface dimension and perform the 3D reconstruction with high speed and good precision.

Abstract: Based on triangulation plane parametric method, the in-depth research of the complex surface flattening system has been attempted. The required database system of complex surface flattening algorithm is established. An attached LSCM algorithm is realized. To be continued, with a proposed initial parametric network, the auxiliary program is constructed with higher accuracy. A friendly interface in VB was finished and a complex surface flattening system is realized with Solidworks secondary development technology based on SolidworksAPI interfacing.

Abstract: Speed of rolling bearing and flow rate of air have important influences on the bearing’s working temperature under the oil-air lubrication mode. Based on basic principle of lubrication, one of the heat productivity equations of deep groove ball bearing is selected to calculate the heat value of bearing’s cavity. The bearing’s temperature field is simulated by Fluent at different rotational speeds and air flow rates. Results of the simulation show that the highest temperatures of bearing have a quantitative relationship with the bearing’s rotational speeds. The relationships between the velocity of inlet and heat transfer coefficient, viscosity of the lubricant and the heating of bearing are analyzed in the end of this paper.

Abstract: Copper wire continuous annealing is a key process of the cable production line. The accuracy of the temperature control directly determines whether the quality of copper wire meets the requirements. In this paper, the fuzzy-PI compound controller was selected and the structure of the annealing temperature fuzzy-PI control system was designed based on temperature measurement. Through the simulation of traditional PI control system and the improved Fuzzy-PI control system, the results show that the Fuzzy-PI controller is better than traditional PI controller. It verifies the feasibility and effectiveness of the Fuzzy -PI controller and proves that Fuzzy-PI algorithm can be successfully applied to the copper wire continuous annealing temperature control system.

Abstract: The paper acquires the equivalent relation between the velocity of wires and annealing temperature through deduction, based on the measurement of the annealing temperature. A controller characterizing annealing temperature could be inserted before the traditional PI annealing controller, so that annealing temperature could be controlled while the annealing temperature deviation is simulated by the error of the velocity of wires. In the paper, a kind of analog circuit is chosen to achieve the equivalent relation between the velocity of wires and annealing temperature by linear fitting under the condition of preciseness.

Abstract: Monitoring system of wind turbine is the guarantee of normal operation of the wind turbine. It has significance on the study, promotion and application of wind turbines. The research status of wind turbine monitoring system was mainly elaborated. The structure of wind turbine monitoring system was analyzed. The monitoring systems based on VB, VC, configuration software and LabVIEW have been made a comparison. And several further research directions of the wind turbine monitoring system have been proposed.

Abstract: This paper presents a novel open architecture for a Precision CNC Turn-Mill Machining Center control system based on PC and Motion Control Card. A CNC Turn-Mill machining center is introduced. The hardware and software architecture is designed based on the concept of modularization. The implementation of key modules is given out. A rough interpolation algorithm with look-ahead function is introduced to improve the machining efficacy. The engineering verification proves that the system can fully meet the expected demands and easy to use.

Abstract: Magnetic sensor with direction memory can be used to control the motion direction. Based on Biot-Savart theory, the magnetic field distribution expression of a bar-type in external space is derived, and the superposition distribution of both inner and outer magnet is directed by the principle of superposition, which can be used to quantitatively describe the magnetic distribution formed by inner and outer magnet, and accurately scope the effective field. According to the operating characteristics of the magnetic reed switch with different value of pull-in and drop-out, by a proper detecting distance to ensure the magnetic field strength value of inner magnet at magnetic reed switch greater than pull-in value and less than drop-out value to make magnetic reed switch maintaining the original state when outer magnet leaving. Meanwhile, by a proper detecting distance to ensure the superinposed magnetic field strength value greater than pull-in value in the forward direction, and less than drop-out value in backward direction. Calculation of response curves show the impacts of magnet size, response intensity and detecting distance variation on the sensor.

Abstract: The 3D variable cross-section roll forming is a kind of new metal forming technology which combines large forming force, multi-axis linkage movement and space synergic movement. This paper mainly introduces the application of path interpolation function of the Siemens SIMOTION motion control system and multi-axis synchronous function in 3D variable cross-section roll forming control system.

Abstract: Glazing is a key procedure in ceramic product surface decorating processing. Recently, robots are gradually utilized to fulfill the glazing work instead of manual work. However, the researches on freeform surface glazing technology lag behind the research on robotics technology, thus limits the application of glazing robot in ceramic industry. In order to improve the quality and efficiency of robot glazing, this paper presents a new method which is base on STL model to generate trajectory for glazing spray gun. The whole procedures of this method have been discussed explicitly.