Advanced Materials Research Vols. 605-607

Abstract: In the microelectronics manufacturing domain, a linear platform plays an important role to achieve high speed, high position resolution and a long stroke. In this paper, a concept of macro/micro platform is presented by combining with a voice coil motor and a piezoelectric stack actuator. This macro/micro system was investigated by mechanical analysis, related property indices and so on. The static and modal characteristics of the macro and micro system were calculated by finite element method, and then some important conclusions were obtained. The displacement and stress distribution of macro and micro system were disclosed. The relevant change trends of displacement and stress under the different load were investigated and the first four natural vibration modes of the macro system were obtained. Finally, a structure model of macro/micro concept was designed and established by above calculation. These results provide a solid theoretical support for its application in the microelectronics manufacturing equipments.

Abstract: Electrodes have an important role in performance of sulfite detector biosensors. To increase efficiency of performance, using immobilizing processes in the structure of an enzyme electrode is very important. Enzymes can be connected to the working electrode by crosslinking and trapping methods. In this paper, sulfite oxidase enzyme has immobilized on aluminum, screen-printed carbon and glassy carbon electrodes in different ways. Flow production measurement of amperometric cycle showed that aluminum and screen-printed carbon electrode had better performance at concentrations less than 110 micro-molar, but in higher concentrations, glassy carbon electrode showed highest conductivity.

Abstract: This paper presents a new real-time system to acquire motion information of human articulated objects such as arm and head. The system does not need any marker or device to wear on human body and adopted stereo camera to obtain robust system against for illumination and complex background without position initialization of articulated objects. We present a solution to estimate self-occluded body objects when human model behaves normal action towards the camera. The main idea of the solution is to apply a component labeling techniques on sliced disparity map, and found the arm position when the arm is located in front of basis distance of body and we could also found arm location when the arm is located on the basis distance with Morphological methods. From this approach, we can obtain the full body shape considering self-occlusion. It is simple and fast in comparison with other methods which satisfy real-time performance and accuracy of object tracking at the same time.

Abstract: The paper introduces a novel in-motion SINS initial alignment algorithm using the inertial frame as computing reference. First, dead reckoning method is utilized with the help of the external odometer speed information aiming to eliminate the angular and linear moving disturbances. Second, in order to suppressing the divergence of the positioning error, a new integrated Map Matching algorithm is introduced which is able to reduce the effect of misalignment angle from coarse alignment for positioning error. Road test results show that this algorithm has greatly reduced the coarse alignment of directional accuracy and saved the requirements of speed and route for land vehicles. Not only is the mobility of land vehicle enhanced but also the accuracy of initial alignment of inertial navigation system is improved, which is meaningful in real application.

Abstract: This paper introduces the characteristics of SolidWorks software and process of modeling and design of giant magnetostrictive actuator. Parts designing, formation of assembly body, sports simulation, and two-dimensional engineering graphics are completed on the way of giant magnetostrictive actuator structure with SolidWorks software. In the process of the giant magnetostrictive actuators modeling, the interference and clearance of assembly bady is found and revised in time to ensure the design more reasonable.

Abstract: A real-time control system with TMS320F2812 DSP microprocessor as a control core for precision variable rate fertilization was designed, which were composed of the power system, DSP microprocessor controller, executive mechanism for variable rate fertilization, data storage module, speed test module and human-computer interaction module. A human-computer interaction interface system based on data storage and graphics was developed and the main control program was programmed. When the control system is working, the fertilizer rate is firstly entered by human-computer interaction interface, nextly the fertilizer rate and speed information are read into the DSP controller, and then the speed information is transmitted to monitor, finally the output pulses needed by motors are calculated, so the fertilizer rate can be controlled accurately. An experiment was conducted in the laboratory environment. The results showed that the error of fertilization rate of each fertilizer element was nitrogen (N: 0.05%), phosphorus (P:0.73%) and potassium (K:1.16%) respectly, and the consistency variability coefficient of fertilization rate of each fertilizer was nitrogen (N: 0.31%), phosphorus (P: 0.32%) and potassium (K: 0.15%) respectly. The control system for precision variable rate fertilization has high precision, good reliability and stability.

Abstract: A cleaning robot for household cleaning is designed based on the single chip microcomputer AT89S51. It can complete home environment clean in the case of unattended. With the help of the infrared sensor and the control system, the Cleaning robot can automatically avoid the static and dynamic obstacles in the working environments and clean the ground in the room. Practice has proved that its structure is compact, flexible, easy to implement and control and it can initially complete the obstacle avoidance and cleaning tasks.

Abstract: The objective of this paper is to study the biomechanics of the fingers when using a pen in different writing stances: the Standard Stance , the Ostrich Stance, the Fist Stance, the Pinching Stance, the Thumb-Tucking Stance and the Two-Finger Stance. In the study, a pen, covered with Optical Fiber Grating (OFG), is used to measure the pressure exerted on the fingers.

Abstract: For the purpose of studying on the machining process of complex ruled surface, a new method of computer simulation about five-axis linkage WEDM was put forward.Through analyzing the characteristics of five-axis linkage WEDM and its motion laws, the related mathematical models were built. The whole machining process of five-axis linkage WEDM can be directly observed by running the simulation program. The ideal simulation results can be obtained. The ideal machining parameters gotten by computer simulation provide a theory basis for machining complicated ruled surface. Consequently, the machining capability of WEDM is extended and the problem of machining complicated ruled surface is resolved.

Abstract: Based on the structure and working principle of our giant magnetostrictive actuator (GMA), the properties of the driving magnetic field were researched. A 3-D nonlinear magnetic field model of the GMA was established with the finite element analysis method, and the magnetic field distribution of the GMA was obtained with the software ANSYS. Then the 3-D model helped us to find the effects about the distribution of magnetic field of the GMA from the structure. The 3-D magnetic field finite element analysis model can give us a new tool of GMA design and analysis.