Applied Mechanics and Materials Vols. 416-417

Abstract: Based on a digital signal processor hardware and the wavelet transform theory the next generation of electri'cal parameters automatic test system is designed. The current and voltage signal measurement relative error is not more than 0.2%, the power factor and harmonic content measurement error is not more than 1.1%, and frequency signal measurement error is less than 0.1% by this system.

Abstract: In the completion of traceability process of complex automotive transmission quality problems, traceability analysis on quality problems was given according to the actual situation of the gearbox assembly process and the idea of it illustrated, and traceability model about the quality of automotive gearbox assembly constructed based on the contrast analysis. It has shown that: the use of this analysis method was feasible and effective in the traceability process of transmission quality problems. Traceability method based on the contrast analysis is feasible and effective and persuasive in the traceability for transmission quality problems.

Abstract: Along with the increasing investment in the construction of large-scale data centers as well as operation centers, the users of the data centers have begun to encounter all sorts of difficulties in safety, energy consumption, and automated management. Computer room is the core of the whole automated construction and its establishment rationality, areas, and extensibility have a close tie with the maintenance and flexibility requirements of computer room. Under the demand of users, how to select the most appropriate intelligent power distribution cabinet for the computer room of video monitoring data center has become very important. In this paper, the functions of intelligent power distribution cabinet in computer room are analyzed from the perspective of user demand, and then how to select the most appropriate intelligent power distribution cabinet products is discussed.

Abstract: Spherical ultrasonic motor (SUSM) is utilized primarily in the assembly sectors, precision machining and active tracking devices. The controllability and accuracy of the SUSM are much concerned in those practical uses. So the sensors which measure the motion of the stator are usually used to build up a closed loop control system. These sensors can detect the position and speed of the ball stator. However, the traditional contact positional detection device which contains photoelectric encoders has the disadvantages of low measuring precision. A novel contactless method which based on an optical sensor, is introduced in the paper. A further illustration including principles of the method, the model of 2-DOF motion of the spherical ultrasonic motor rotor, a set of experiment test-bed to verify the feasibility of the method are presented in the article. The experiment turns out an expectant result and shows the method feasible and significant for application.

Abstract: Video security monitoring has become the focus of social research and development; however, since the camera cannot automatically rotate, there is a blind spot in traditional security monitoring. Considering the abnormal often happens accompanied by corresponding sounds (e.g., where there is an explosion , there will be the sound of explosions), therefore, for compensating the blind spot , the auditory function can be added to the camera to track the direction of sound source automatically which requires the two-dimensional (2-D) localization of sound source to complete , at the mean time , the localization algorithm should be capable of tracking all of the source signals ,as well as be real-time to make the video tracking to be achieved by turning the camera toward sound source timely. This paper realizes the localization of wideband speech signal in video monitoring by using modern signal processing method, linear microphone array, positioning thought based on time delay estimation, frequency domain transform, and spectrum-search method based on energy value. Both the early simulation and late DSP-based embedded system platform have verified the feasibility of the method.

Abstract: Now days he digital systems are very popular and widely used in various engineering areas,especially in monitoring systems, these systems are simple to analysis and design; due to its use logic circuits in their system.This paper treaty of investigation simulation anddesign Alarm Security Monitoring system by using two scientific computer packages known as EWB and Circuit-Maker. The main rezones of using both of these computer packages because they are easy and friendly to use as well as the viability in the market so most of universities and institutes were used.

Abstract: To deal with the high cost and targeted of system in in-transit hazardous materials monitoring, in-transit hazardous materials system and customized vehicle terminal were proposed. The system was based on internet of Things with B/S model and hierarchical structure, which solved the scalability and compatibility problems of hazardous materials monitoring in transit. It discussed two ways to reconfigure the monitoring program and parameters of the vehicle terminal, including USB and wireless. Through the actual operation, the system had some features of high accuracy, low cost, easy to operate, which can custom parameters depending on the type of dangerous substance.

Abstract: The data collection and information management is the core of tunnel monitoring system. Monitoring is the main way during the data acquisition, the article described its role, content, use of instruments and in engineering applications. And for the difficult management and analysis of mass monitoring data about constructing tunnel, by using VC++ and SQL database, the paper design a tunnel monitoring information management and early warning system and realize the functions of information treating such as storage,process,query,analysis,prediction and early warning and automatic output of monitoring reports.

Abstract: For better monitoring of the person's health status, this paper designed and realized a remote health monitoring system. The paper describes design principle of each part of the system. The system is based on wireless body area network. It collected health data using C8051F020 MCU. It transmitted data by Bluetooth and IP networks. The dynamic monitoring results displayed on PC, mobile terminals or remote testing center by GIS map. After testing, the system can accurately capture, transmit and display pulse and body temperature. The test results show that the system is stable, easy to operate.

Abstract: Security problem is the main factor restricting economic development of architecture. Fire accident, in particular, results in serious casualties and losses. As building structural layout is more diversified, there are more and more assembly forms of internal structures and facilities. Automatic fire alarm system is the key in building design and construction. The thesis first of all makes an analysis of the current construction fire accident, points out the application function of fire alarm system and analyzes automatic fire alarm system circuit junction, hoping to contribute to further studies.