Advanced Materials Research Vols. 926-930

Abstract: Concerning the security issues in the running elevator and the fact that elevator monitoring is an effective means to ensure the safe running of the elevator, and the special equipment, users, manufacturers, and government supervision departments will need to master the operating conditions of the elevator. Therefore, combining with the main components, embedded microprocessor, RF communications modules, sensors and GPRS designed the remote elevator monitoring terminal, and complete real-time acquisition of the state data of the running elevator via GPRS communication module to send data to a remote network server. Monitoring terminal cooperates with the web server, database, and host computer software, then realize the remote monitoring and control of the elevator group. Practice has proved the feasibility, effectiveness and reliability of the design of the monitoring terminal.

Abstract: On the base of understanding the working principles of the whole system, this paper introduces the overall design scheme of intelligent controller based on CAN bus of charge and discharge machine for lead-acid battery. The principles of each unit circuit are analyzed in detail. Both current stabilizing precision and voltage stabilizing precision can satisfy the design requirements of the system. Experiment results show that hardware and software design of the system was reasonable.

Abstract: According to the play formats supported by live555 are limited; it is inefficient and complex to play the stream data. This paper describes an IPTV set-top box video player based on chip BCM7466, simplifies the design and improves performance, realizes interaction between browser and streaming media server and plays the video stream with specified formats. It introduces the design scheme of STB software, a detailed description of the design and implementation process of each module, service control, current client, stream processing and control core. By testing, this player is stable.

Abstract: Through the electrical parameters measurement technology of autonomic learning, understanding of the system hardware by regulating circuit, data acquisition card and computer. This paper, by learning to solve the traditional electrical parameters test method of testing process is not continuous, dynamic transient state is difficult to send now and positioning problem. Virtual instrument measuring instrument is based on the computer, it has many advantages compared with traditional instrument, has been developing rapidly in recent years. The system finished the electrician experiment of common electrical parameters such as: voltage, electric current; Dc voltage, electric current; a measure of the resistance, capacitance and inductance.

Abstract: This paper explained function structure and main modules of 3D design system for integrating metro depot outdoor pipelines, and emphatically expounded how to realize threshold value detection algorithm of 3D pipeline. The results show that the system can overcome inadaptabilities of the traditional 3D pipe software in integrating metro depot outdoor pipelines, improves the 3D design efficiency, and has a good effect in practical use.

Abstract: This paper presents the design and realization of pressure measurement system used in FPGA processors with pressure sensor temperature drift compensation by software. This paper discusses in detail the realization of measurement system circuit, the internal structure design of FPGA software, the compensation algorithm analysis and design, and the simulation of FPGA. Finally through the test results validate the design of pressure measurement system with temperature compensation is feasible and effective.

Abstract: Nixie tubes are widely used in industry, but the design of the driving circuits is one of the biggest challenges. Aiming at the characteristics of the large-size nixie tube, this paper designs the hardware circuits for 5-inch nixie tube at first, including the driving power, the bit drive circuit and the segment drive circuit. Then, the design programs to drive CH452 chip were given. During the realization process of the circuits, the perennial problems and the corresponding solving methods were given at last. This paper provides guidance for the design of driving circuit for nixie tube.

Abstract: In the efforts to improve the capability of duty service and contingency-handing of informational system and deal with the communications security of helicopter, according to the request of the airborne electromagnetic equipment miniaturization and conformal, design of an air-gap L-shaped feeding arc slot antenna. This antenna is an omnidirectional antenna, its profile height under 0.03 working wavelength, the size under 0.5 working wavelength and the transmission gain exceed 3dB.

Abstract: A platform for digital electronic technology is presented based on FPGA, which is built by using of Cyclone III EP3C5E of ALTERA. The platform is engineered not only for a variety of digital circuit designs but also for in-system programmable design. Voter system as an example, function of design is completed by design of module and the hardware language, and the result is compared with other function modules. Furthermore, the accuracy of the running result from platform was analyzed by using design of system module. The performance test results show that the platform adequately satisfies the need of digital electronic technology and run well.

Abstract: AC servo system has been widely used in many fields with its high performance and the fast development of intelligent control strategy. Targeted at the single-axis motion control applications in industrial automation, a kind of single-axis motion control system, based on FM354 controlled by S7-300 PLC, is designed. The system consists of three to the position, speed and current closed-loop control to achieve precise position control. The position loop is implemented by FM354. The speed loop and current loop are encapsulated in the servo driver. Through monitoring and comparing the dynamic performance with traditional systems, it can find out the bench runs smoothly and positioning accurately, perfectly meeting the technological and application requirements. It also can be applied to a variety of occasions and used for multi-axis extension.