Advanced Materials Research Vols. 706-708

Abstract: The detailed analysis of the structure and paramerers of the connecting rod is put forward by using the improving D-H method to establish the link coordinate system and the kinematics equation, based on the special filer shell arc welding robot with six degrees of freedom designed. Therefor, the correctness of the kinematics equation is verified though the simulation of Matlab function with the robotics toolbox. The anasysis simulation results show that the rationality of the robot structure that based on the kinematics analysis, is feasible.

Abstract: This paper presents a vision servo system for high-voltage-live-working robot, which consists of image acquisition subsystem, image processing subsystem and robot control subsystem. It uses binocular stereo camera which mounted on the hand of robot to get the image of the working scene, and then uses binocular stereo vision algorithms together with target tracking algorithm to get the 3-Dimensions information of the power equipment. The robot control subsystem receives the 3-Dimensions information, and then guide the robot moving to the target location to implement the high-voltage-work. The proposed system can implement the high-voltage-work without Human involvement and improve works level of automation and efficiency.

Abstract: In this paper, a precision measurement method of machine part based on radiometric calibration was proposed. According to radiometric calibration, the response function of our camera's CCD sensor was obtained, and the non-linear mapping relations between image gray value and the radiant energy of machine part was established. Based on this, the real size of machine part in image was restored. The experiments showed that this method could effectively improve the measurement accuracy, and it would be of great importance in non-contact measurement field of machine part.

Abstract: This paper has proposed a kind of intelligent entrance guard system, which is based on 32 bit ARM7TDMI embedded system combined with RFID technology. By expanding sound alarm, display and communication module inside, RF, camera module and fingerprint module outside, it can realize multiple identity authentication, so the security and protection ability of the entrance guard system get enhanced.

Abstract: A novel method adopting position sensitive detector (PSD) and laser collimation technique to measure four-degree-of-freedom of linear guide rails is presented in this paper. The yaw and pitch errors can be obtained based on the relationship between output coordinates of horizontal PSD and angle of the mirror. Meanwhile, the horizontal and vertical straightness errors can be calculated by the relationship between output coordinates of vertical PSD and position of sampling points. Besides, BP neural network algorithm is used to correct the nonlinearity between actual and ideal output of PSD. The method is analysed theoretically in detail. The experimental results show that the four-degree-of-freedom of linear guide rails can be measured with high accuracy.

Abstract: Because the car headlamp light intensity is too large and it leads to accidents, This paper is based on the initiative to reduce the light intensity of their vehicles according headlights glare or close the high beam and open the lamp method, to achieve the purpose of the glare. The system is AT89C51 microcontroller as the core control, use of photodiode sensor to induction opposite the car headlights light intensity , when opposite car headlights light intensity up to a certain value, photodiode get a signal to the microcontroller ,and then microcontroller sends a signal, to control buzzer sound or not. When the buzzer sounded, using DAC0832 chip to control the brightness of the light emitting diode or control the light on and off and low beam enabled. When enabled for dipped beam, has been more than the antiglare range; after the scope enabled high beam, in order to achieve the anti-dazzle cycle. Through practice, the system has reached the anti-dazzle purpose and has practical value .

Abstract: Aiming at the security problem of railway transport caused by loading position of large equipment, a security alarm system for railway transport of large equipment is developed based on displacement detection by photoelectric matrix. The technologies of photoelectric measurement, wireless communication and computer control are comprehensively integrated, the wide temperature components, low power circuit and high-capacity batteries are used, a variety of energy saving operation modes and anti-interference technical measures are adopted, systematically optimized and comprehensively analyzed. Tests show that the designed system has the characteristics of perfect function, low power consumption, strong anti-interference capability and high reliability, which plays important role on security of railway transport and avoids traffic accidents caused by loading position of large freight.

Abstract: To solve the existing problems in the NC machining process, the optimization design of cutting parameters in NC milling machine with genetic algorithm. With the maximum production efficiency as the optimization objective, the spindle speed, feed speed, milling width, depth and other parameters as optimal variables, establishes the optimization mathematical model of machine tool. The optimization results show that: parameters optimization can significantly improve the processing efficiency, and bring economic benefits for enterprises

Abstract: According to the shortcomings of currently shooting range ballistic measuring method, the differential technique is applied in positioning system through analyzing the differential GPS technique to realize range ballistic high-precision measurements. This paper introduces the shooting range positioning system design and the realization of software terminal. This method overcomes the disadvantages of shooting range measurement .Positioning accuracy has indeed been improved through this way.

Abstract: Since the posture of portable exoskeleton is consistent with human motion and each joint degree of freedom is same, on the basis of DOF coupling in portable exoskeleton, the finite element analysis of the mechanical structure in portable exoskeleton has been calculated. According to the anthropomorphic mechanism design method, the universal joint structure has been used to meet the requirements of degrees of freedom in the mechanical structure of the exoskeleton; using the Hydraulic cylinder to simulate the contraction or stretch of human muscle, and the three-dimensional model of the exoskeleton mechanical systems has been created with the Solidworks software; selecting Human CAD software and setting the parameters of the movement of the human body model, the variations of the various joints can be obtained; using the Parasolid as the standard format for data transfer between the two software Solidworks and ANSYS, the finite element analysis model was established, and according to the principle of coupling, the three translational DOF and two rotating DOF was coupled, besides through both legs vertical standing, one knee kneeling, and one leg vertical standing three conditions, the exoskeleton strength was analyzed. The simulation results show that under the three conditions, a concentrated stress all has been found in the exoskeleton structure, besides the concentrated stresses all have been obtained in the cross-section changing site or the junction of the two components, which stress values exceeded the allowable stress values of the aluminum alloy material, so the suggestions for improvement of the structure are put forward in the article; at the same time, the simulation results provide a numerical basis for the optimization of the portable exoskeleton structure.