Applied Mechanics and Materials Vols. 496-500

Abstract: Ordinary positive pressure breathing apparatus only supply the air to firefighters within a certain time, and cannot help to realize the real-time control of the service status of the apparatus, leading to the existence of security risks. In this study, a wireless early warning system of positive pressure breathing apparatus was proposed in response to the actual demand of the fire force based on a combination of GPRS communication technologies, intelligent prediction algorithm of the breathing apparatus, and network-based programming technologies. The system features strong applicability and small error (a working error of ±6%), and thus can satisfy the demand of enhancing the safety guarantee for firefighters on the fire-fighting and rescue scene and is of significant application value.

Abstract: Aiming at the problem that the temperature measurement is backward in wine solid-state fermentation. In this paper, a wireless temperature-measuring system for monitoring the change of fermentation temperature describes the detailed analysis of the system architecture, hardware and software. The system based on low-power microprocessor STM8L, with SI4463 as wireless communication module, and LABVIEW as development platform. The system ensures its accuracy by method of least squares piecewise fitting the relation between PT100 resistance and temperature. The nodes use hopping mechanism, periodic sleep and wake-on-radio mechanism to make communication path for the MAC layer stable and decrease the power consumption. The system has a stable performance and has achieved good results in practical application.

Abstract: In order to adapt to the demand of depot station safety management work, the Security Monitoring and Early Warning System of Oil Depot Station is designed. The system has the function of network services, database, parameter and video monitoring and security analysis and early warning. Practical application shows that this system has the advantages of simple operation and powerful monitoring. It has the important practical significance to improve the level of safety management of oil depot station.

Abstract: For real-time data management needs of multiple components, sets and workshops hydraulic experimental platforms, a new distributed system of real-time monitoring and data management based on LabVIEW was developed, by solving following key technologies: hydraulic data real-time monitoring and acquisition at remote distance, data management and reappearance, fault diagnosis expert system in test process. Through the experiment, monitoring in real-time and the operability of data management are confirmed.

Abstract: In order to control the miniature laser processing system, self-developed, a control system based on xPC and image processing is designed. For machining the miniaturization parts, through using xPC, servo drives and associated peripheral equipment, the hardware control platform was build, and then the file containing control information was created, trough processing the image. Through analyzing the results, it confirms that the miniature laser processing system based on xPC and image processing is suitable for the requirements of machining, and has the advantages of real time running, easy constructing, and handy operating.

Abstract: Aiming at the power optimization control of shearer, a novel method by ANFIS was proposed to control the power of shearer. Firstly, the method based ANFIS was used to evaluate the current power state of the shearer, and then ANN MPC model was used to control the speed of shearer. By adjusting the speed of shearer in real time, it was to achieve the purpose of power optimization. Simulation results in Mat lab shown that the effectiveness and real-time of the method which was proposed in this thesis was verified.

Abstract: Now days, induction motor drives are used in home appliances and industries for various applications. These machines typically have low efficiencies and need high maintenance for continuous process. Hence, it is necessary to fault diagnose and test the motor for its efficiency with different parameters. The fault controller unit is designed by using Genetic Algorithm for the optimum selection of switching pulses in Space Vector Pulse Width Modulation to the supply input of IGBT(Insulated Gate Bipolar Transistor) inverter. The proposed design technique is modeled and verified using Matlab Simulink as one of the effective motor controller for maintaining the constant speed of the motor.

Abstract: This paper presents a random sampling method for gas signal,which is based on the principle called compressed sensing. This method is suitable for gas sensor network, and it is conducive to the realization of low power, low cost of the gas sensor network. According to the characteristics of the output signal of gas sensor, we design the random sampling method which acquire the useful information in signal. Using compressed sensing recovery algorithm to reconstruct signal,we finally fulfill complete signal collection. The simulation results show that the method we proposed can achieve signal acquisition with a sampling frequency less than 1/5 of standard sampling frequency.

Abstract: Using the full-band CCD (PL4240 UV, FLI) and Yunnan Zhihai ultraviolet observation camera system (UVYNZH-II) shoot sweat fingerprints on A4 wrapper and A4 printing paper, to comparatively analyze the effects these two camera systems. The clarity and contrast of ultraviolet image captured from Full-band CCD is better than from UV observation camera system, but both devices are able to reflect the fingerprint ridge characteristics. For sweat fingerprints, it is better for the full-band CCD, but under good conditions for sweat fingerprints bridges, UV observation camera system can basically meet the requirements of sweat fingerprint UV shooting.

Abstract: The ADO.NET is a brand-new data access technique of the Microsoft. It is the bridge of the .NET application and database communication, which use the XML to exchange data, and add many new program interface to access simply database. This paper introduce the structure, feature and inner object of the ADO.NET, and analysis database access technique of the ADO.NET, give the method of the ADO.NET connection various kinds of database. Finally, an example of the C# connection SQLSEVER database is enumerated, and the detailed implementation code is given.