Advanced Materials Research Vols. 588-589

Abstract: This study introduces the basic principle of relative blood volume monitor (BVM) by comparing several ultrasonic travel time measuring methods, brings forth the high-precision ultrasonic travel time measuring method based on TDC-GP2 time measurement chip and MSP430 Single-chip Microcontroller (SCM), presents the configuration of hardware and software in the system, and illustrates the structure and time measurement principle of TDC-GP2 time measurement chip.

Abstract: Measurement method is studied utilizing vertical gyroscopevertical gyroscopevertical gyroscope, static earth magnetic field sensor and CPU. According to electromagnetism induction law, when a wire loop incises the magnetic force line of the earth magnetic field, it will bring about the induction electromotive force, the earth magnetic field can be calculated by signal processing of induced voltage in measuring coil. A heading and attitude measuring system to vehicle are designed, the heading precision were raised. Experiment data states clearly the heading precision is not more than 0.5°. This system can be used to detect heading and attitude, and can be extended easily.

Abstract: In order to make electric cars running stably under our control, this paper introduces a measurement network for electric cars based on CAN-BUS. There are 9 CAN nodes in the network, 8 measure nodes based on MCU for sampling 146 parameters and 1 display & record node based on PC104 for recording and displaying the information. By using flash disk, the recorded data can be transferred to PC where each parameter can be curved and analyzed. At last, it ticks off the examination result in Shandong Electric Vehicle Testing Base. The accurate measurement of the parameters, real-time record, communication normal work, data processing shows that the running motors is more stable and achieves the expected results.

Abstract: A novel ultrasound imaging system based on endoscopic array probe is presented in this paper. The system utilizes an endoscopic linear-array probe instead of the conventional single-element probe to implement ultrasound scanning in vivo. For the system, a micro linear-array ultrasound probe sized Φ10mm×20mm is firstly designed. And then the excitation circuit, gating circuit and echo receiving and processing circuit are all designed cored by a center control unit FPGA. Finally the research of d/2 focusing algorithm is implemented on the basis of the system. After processed, the gray image of echoes reflected by a glass jar’s wall is obtained and shown on a computer.

Abstract: A system based on spectrum analysis for cooking oil testing which combining laser-induced-fluorescence and laser-Raman technology is established. Several oil samples are testing by this system. The measurement results show that, there are rich information for fluorescence and Raman spectrum for the oil samples and there are obvious difference between the fluoresce spectrums for these samples, which can be used as a reference for oil pollution classification and recognition. This technology can be used for in-situ monitoring equipments.

Abstract: Wire bonding is rapidly developmental technology of microelectronic packaging nearly half a century and become the main trend of semiconductor packaging field currently. This article introduces the main process parameters influencing on bonding quality, the methods to improve the bonding reliability, and prospects of developmental tendency of wire bonding.

Abstract: Program critical, high cost and delicate space hardware like satellite built with pressurized tanks, sensitive optics, delicate electronics and hazardous chemicals need protection from various environmental hazards during transportation. These environmental hazards include shock, vibration and handling loads and climatic hazards such as temperature, humidity, rain, dust due to harsh ambient atmospheric conditions etc. The Satellite Transportation System (STS) is equipped with adequate protection and monitoring system. The environmental data acquisition system is used to monitor the environmental conditions of satellite during transportation. This paper describes the data acquisition system used for quantitative validation of shock and vibration attenuation system and temperature and humidity control system. The acquired data are processed and interpreted to express the environmental conditions during various phases of development such as road survey analysis, performance validation and refinement of design for the shock and vibration isolation system of trucks and STS. Further, these data are used for the post-transportation health assessment of satellite that are vital to minimize post transportation tests on satellite.

Abstract: Route design is an important part of airborne remote sensing. On the basis of DEM, using raster and vector geographic information, designing aerial route quickly and accurately is the main target of this system. Considering the actual requests, this system formulates two modes of aerial route design methods: according to navigating area and two points to design. This paper mainly introduces functions of system and algorithms of aerial route design methods.

Abstract: We proposed a theory of assembly constraint transformation (ACT), and achieved the display and free rotation of 3D model using OpenGL graphics standard as interface, VC+ + 6.0 as the development tool, and ArcBall algorithms as the basic application, making it easy to accomplish Human-Computer Interaction through the mouse control in virtual assembly.

Abstract: This paper studys the feasibility of the shadow of interactive gestures on the projection screen as the control instructions in a projection interactive system. With regard to complex background of the projection screen, we put forward to detect mobile gestures and the shadows of gestures by using the way of the Gaussian mixture model. Relative to the non-rigid body interaction gestures, The shadow of gestures has a simpler two-dimensional characteristics and greater differences from the other regions of the projection screen. Based on this characteristics, we adopt Ostu threshold segmentation algorithm to remove the interference of the gestures. Then we use the mixed way of the radial symmetry transform and curvature threshold to position the interactive fingertips as interactive instruction of the projector-camera system. Conctroling the screen in a wide range without carrying any equipment is completed. The experimental results show that this method is easy to operate and has a high accuracy rate.