Applied Mechanics and Materials Vols. 519-520

Abstract: There exist multi-field coupling effect in prefabricated defects polymer materials under loading. For understanding the pyromagnetic effect, it is crucial to accurately measure the coupling relations of the key physical quantities about displacement, tensile load, temperature, and magnetic field. To overcome the obstacle in current measurement systems for synchronized measurement, an integrated measurement system for multi-field coupling detection is presented to enable synchronized, automatic detection. This paper introduces the system structure, software design, and the detailed design of varied-speed PID control methods. Test results show that, the system is effective for valid data acquisition for displacement, tension load, temperature and magnetic field of a high polymer Polyvinyl Chloride (PVC) plate sample under constant tensile load, and all test data can be visualized on the software interface. This system provides a good test platform for further research on pyromagnetic effect of PVC plate.

Abstract: To find the point of failure of dark line will tend to make electricians helpless, so the design of handheld lighting circuits detector is necessary. This article discribes the main idea of probes inducing the alternating electric field around electricity cables[1]. The collected signal in system is processed through the amplification, filtering, comparison circuit and STC12C5A08AD. Finally, real-time display grid numbers and testing time on 12864. The system’s functions include position detection, discrimination, position records and others. The system can well distinguish different cable. After testing and certification, system is reliable, stable and with practical value.

Abstract: By analyzing the interface characteristics and test requirements of certain aeronautic equipment, using PXI instrument as test platform, integrated using SPIB instrument, virtual instrument, simulation technologies, independent developed video output collection equipment, SRU testing equipment modules and other hardware device, developed integrated automatic test equipment which based on PXI and GPIB bus instrument technology, provide airborne work environment for weapons, instrument, electrical, communication, navigation, identification, reactance systems airborne LRU, automatic complete the control, incentive, performance and function test of LRU.

Abstract: Public safety emergency rescue can now detect the characteristic signals of a living body (e.g. movement, breathing, heartbeat, etc.). This area of research uses life-detecting radars to identify the bodys type, quantity, direction, distance, gestures, and physiological characteristics. Life-detecting radars (LDRs) emit electromagnetic waves that can pass through walls or other covered media and probe for human life. This technology can be widely applied for search and rescue attempts in fires, landslides, mudslides, earthquakes, and other disasters. It can also be used to monitor personnels location in terrorism or hostage rescue activities, search for wounded soldiers on the battlefield, and lock enemy snipers in urban warfare and other environments.

Abstract: The mud pulse signal extracting in MWD(Measurement while drilling) was a core technology in the oil drilling developing process. In terms of the extraction and recognition problems of weak mud pulse signal in MWD, this paper analyzed the transmission format of Manchester coded down-hole datum and transmission characteristics of mud pulse signal and used morphological filtering algorithm to extract the mud pulse signal. According to the characteristics of the Manchester coded underground synchronization signal. After determining the location of the signal start time, It proposed a pattern similar waveform-recognition algorithm to detect the mud pulse signal. The field tests show that the algorithm can accurately define the mud pulse signal starting time and can effectively improve the decoding accuracy and meet the requirements of engineering applications.

Abstract: As for this problem that the equipment/devices maintenance and troubleshooting of new avionics systems is very difficult, the fault Diagnosis Method based on testing is proposed. This method is used to build fault diagnosis model and generate diagnostic testing strategy by establishing the relationship between the fault and test, and then the automatic test equipment is used to test for fault under the reasoning of the diagnosis inference, finally, fault conclusions are drawn. Application shows that this method is feasible, fault location accuracy is high and application prospect is broad.

Abstract: National competition after seven years now, both in hardware and software design adjustments have been more mature, less flexibility in terms of hardware relatively fixed , the software side is much room each have their own characteristics , but generally the algorithms such as PID algorithm curvature solving , fuzzy control and filtering algorithm has applications in multiple sessions . The main task at this stage is to make full use of existing hardware resources, and constantly improve the program control algorithm to achieve the shortest possible time the car smooth finish the course.Sensor technology is equal to an industry, it is bound to promote the development of other industries, to some extent, represents a country 's level of automation intelligence . Many smart car camera information as input sensor has many other sensors do not have the advantages, such as the object feature extraction , broad vision , etc., so camera-based intelligent car systems research will promote the development of smart cars .

Abstract: To solve the problem of the incompatible and interoperable in complex system configured by different buses or transducers, the paper introduced the IEEE1451 standard protocol, the transducer electric data sheet specified in the standard was analyzed in detail. On the basis, a smart sensor module was designed based on FPGA, TEDS specified in IEEE1451.2 were designed, data of transducers were filled in and downloaded in graphic and programmable VB language. Adopting intelligent TEDS in IEEE1451.2 standard improves the system performance, cost-effective and versatility, making the complex system be developed more easily, data processing simple.

Abstract: The intelligent instrument for measuring eutectic and co-melting point of freeze-drying material were designed based on resistivity method. Series and parallel joint divide voltage method were designed to increased the measurement rang of impedance. The Relative error of the impedance measuring method was tested. The results show that in the measurement range of 1kΩ~9000kΩ, the relative error of the impedance is less than 8%. Determinant for the eutectic and co-melting point was choosed according to the temperature-impedance curve. Several material were tested, the experiment results show that the instrument can measured the eutectic and co-melting point automatically.

Abstract: With the development of on-line monitoring technology of electric power equipment, and the accumulation of both on-line monitoring data and off-line testing data, the data available to fault diagnosis of power transformer is bound to be massive. How to utilize those massive data reasonably is the issue that eagerly needs us to study. Since the on-line monitoring technology is not totally mature, which resulting in incomplete, noisy, wrong characters for monitoring data, so processing the initial data by using rough set is necessary. Furthermore, when the issue scale becomes larger, the computing amount of association rule mining grows dramatically, and its easy to cause data expansion. So it needs to use attribute reduction algorithm of rough set theory. Taking the above two points into account, this paper proposes a fault diagnosis model for power transformer using association rule mining-based on rough set.