Advanced Materials Research Vols. 774-776

Abstract: To satisfy the special requirement of Real-time Processing for 1553B-Bus in large-scale ground experimentation of airborne weapon, the design and realization of 1553B-Bus communication board based on USB-interface and Real-time Processing soft for 1553B-Bus are proposed. The high performance fixed point MSC1210Y5 and the Advanced Communication Engine (ACE) BU-61580 are all used in the design of hardware. The function of logical control is implemented by FPGA. The system achieves data acquisition and real-time processing of 1553B-Bus in ground experimentation; the experiment shows that the system achieves the desired design requirement of experiment testing.

Abstract: Take the 168F SI engine for example. Analyze the influence of small non-road SI engine’s vibration performance and conformity of production which created by the size’s deviation of the crankshaft counterbalance using the engineering software ADAMS. The result shows that the cylindrical dimension and tolerance value of thecrankshaft balance block have greater impact on machine’s vibration. After machining, the cylindrical dimension of the gasoline engine’s crankshaft counterbalance optimized from 42mm to 42.43 ± 0.15mm. The equivalent vibration intensity ranges from 56 to 64.1mm/s, which have a significantly improvement compared to the original equivalent vibration intensity ranging from 56 to 102.8mm/s. Draw the conclusion that the control of dimensional tolerances is vital to control the non-shaft balance single-cylinder engine’s vibration performance and conformity of production.

Abstract: For an established control system, scan cycle time of the PLC is almost constant during steady operation. Scan cycle time of PLC can be act as a timing unit and realize the function of timer by appropriate programming. The timing method based on PLC scan cycle time is practiced in judgment of start success of generator set and grasping of ACB (air circuit breaker of generator) closing opportunity in automatic synchronization control and achieved the desired results. Application of this timing method reduced the hardware of the control system, improved the reliability and economical efficiency. Several years of operation in training lab proved that this control method is reliable and steady.

Abstract: Combining optical-electric separation with mechanical separation, winter jujubes are successfully separated by the characters of unripeness, ripeness and the size of it. When jujubes are sent into a box that holds jujubes, motor drives belt and jujube pallet to carry jujubes on the photoelectric separator. The separator is designed based on photocell. Effective control of electromagnet is achieved by photoelectric sensor which is consisted of red LED, power amplifier and MCU. Then winter jujubes are separated through the characters of ripeness and unripeness. Mechanical separation is accomplished by leakage pipe for jujubes in the adaptor. So winter jujubes are separated through their size.

Abstract: The feature of correlation analysis were described and applied to analyzing the vibration signal of the gearbox. Aiming to that the diagnosis effect of the rolling bearings incipient fault was not good through the vibration spectrum and the resonance demodulation spectrum directly, the information fusion technology based on the correlation analysis is proposed to processing the vibration and acoustic resonance demodulation signal. The experimental results show that the presented correlation fusion analysis technology can be as the basis of the effective fault diagnosis method for the rolling bearings incipient defect.

Abstract: In this work, we present the development of MEMS switch array and ZnO nanowire-based sensor technology to detect multiple analytes in a sensitive manner. A novel approach that incorporates the advantages of MEMS technology with highly sensitive ZnO nanowire sensor technology has been described. We demonstrate the fabrication of MEMS switch arrays and ZnO nanowire sensing chip that has been appropriately developed. Our integrated approach is believed to enhance the sensitivity of the entire sensor system in addition to increasing the capability of the system to detect multiple analytes with high degree of selectivity.

Abstract: A new method is proposed in which three images of the same field of view under different lighting conditions were analysed comprehensively. On the basis of pretreatment of debris digital image and extraction of characteristic parameter of debrises, the debrises were recognized by establishing the BP neural network model. The results showed that the recognition accuracy of debrises could reach 85.6% with this method.

Abstract: LED chips positioning is a key process in chip quality classification. With the use of pattern-matching mechanism, we proposed a new method for high accuracy positioning system which can be used in detection, sorting and crystal binding machines. Firstly, we used the Otsu and morphological filtering algorithms to gather all kinds of LED chips image. The boundary characteristic points of image were then obtained to bring the feature vector to generate a pattern template. Similar characteristic points were then searched in the sample images to achieve accurate chip positioning. Finally, the Euclidean distance error between the template and target feature vector was compared. As the pattern template is only dependent on the boundaries and independent of the grayscale, the positioning robustness and accuracy can be drastically improved, achieving a positioning error of less than 1 μm and a positioning speed of over 574 grains/second.

Abstract: Directional pattern is a clear visual representation form of antenna radiation characteristics. Taking a certain kind of shipborne radar as example, the basic principle of the directional pattern measurement was analyzed, the basic methods and execution scheme were introduced in detail. A directional pattern automatic testing system which was based on Lavbiew was researched on the basis of existed testing techniques, and finally the directional pattern automatic measurement was realized through the use of virtual instrument GPIB and serial interface techniques.

Abstract: The pigeonry environment monitoring system based on ZigBee wireless network which was designed and developed consists of three main parts: the data acquisition module, the central node and the environment monitoring software. In this system, the data acquisition controller is mainly composed of ZigBee wireless acquisition module, air temperature and humidity sensor, dust concentration sensor and light sensor, the controller can collect pigeonry environmental information and receive PC instruction from the host computer. The central node uses a wireless data transmission module which is as the information transmission channel between the host computer and the data acquisition module. The environment monitoring software is as a man-machine interface, which was developed based on C#, and the storage of information collected is achieved by SQL Server. After the test and experiment, the results show that the pigeonry environment data acquisition controller can regularly collect environmental information and submit data information to the monitoring center, thus achieving the remote wireless control of monitoring center. The pigeonry environment monitoring software is able to display and record the collected and transmitted data, also achieve the remote control of the pigeonry environment.