Papers by Keyword: SCM

Abstract: This paper introduces a solar controller based on SCM, system uses STC15F2K61S2 microcontroller as the core device of the control circuit. This design uses PWM (pulse width modulation) control technology and MOSFET tube is opened and closed to control the battery charging and discharging. The experimental results show that, the controller performance is reliable, can monitor the state of implementation of solar battery and storage battery, battery charge and discharge control optimal, to prolong the service life of the battery to.

Abstract: Every industry, organization or individual needs to be minimize their expenditure, time and fatigue and maximize their profit in supply chain. These goals can be achieved through automation by using Radio Frequency Identification (RFID) and Zigbee wireless communication technologies, which is easily available in the market. Basically RFID technology is used for automatically tracking, locating or identifying the entities. It can easily integrate with low cost low power consumption Xbee (Zigbee) device, which is used to increase the communication range by large number of node deployment. RFID-Xbee network integrates with Laboratory Virtual Instrument Engineering Workbench (LabVIEW) Graphical User Interface (GUI), which gives real time information of supply chain at single control panel. The integrated communication model proves the near field inductive coupling and can be used in supermarket for item pricing, office automation, security system, and car parking. This system confirms the concept of real-time locating system (RTLS) in an indoor environment. The impact of RFID and Xbee network communication model enhance the read range of RFID reader, so that out of range items can be tracked easily without additional RFID readers. The benefit of this system is to maximize profit, reduce human intervention and minimize waste.

Abstract: The digital clock is the timing device by using of the digital circuit to implement the digital display for hours, minutes and seconds. Due to the development of the digital integrated circuit and the wide application of the quartz crystal oscillator, the accuracy of the digital clock is far more than the old clocks’. The control part of the design is SCM AT89C51, and the compiler environment is Keil. The software is developed with C language, and the simulation debugging is used Proteus. The digital clock is convenient to people’s production and life, and it expands the original time function of the clocks greatly. Development trend of electronic instrumentation, and has broad market prospects. The clock can be used in many fields, such as the timing automatic alarm, the automatic schedule bell, the time program automatic control, the regular radio, the automatic lights close, the oven timer switch, etc.

Abstract: In this paper, we describe the improved performance of the SAC-OCDMA system using OFDM technique compared to SCM/SAC-OCDMA system. The theoretical results of proposed system shows that the new SAC/OCDMA system with OFDM technique provides better performance compared to SCM/OCDMA system based on multi diagonal code (MD), and the results have been evaluated based on BER and number of users for bit rate 1Gb/s and 10 Gb/s . Thus this system could be a promising solution to symmetric high capacity access networks with high spectral efficiency, cost effectiveness, good flexibility and enhanced security, which is candidate for next generation networks.

Abstract: With the advancement of society, transport plays an increasingly important role in human society, but more and more traffic problems are constantly plagued mankind. Aiming at the problems facing the traffic and improve the traffic situation, the polling system is applied to intelligent traffic control system in this paper. Based on the type of paper feed of the arrival rate theory, the vehicle arrives at different rates, the wait time is different. Arrival rate is high, the longer the waiting time. Then we simulate system and get the simulation results, and compare the theoretical and simulation results. Finally, the theory to practical systems is using in microprocessor hardware simulation, and actual results further validate the correctness. Through the intelligent traffic control system, a good solution to traffic jam phenomenon is got and traffic management plays an important role.

Abstract: Detecting circuit consists of both a sensing circuit and a compensating circuit. Using digital amplification and filtration, detected signals were input to SCM with high-accuracy data acquisition. SMC substituted for a sensing circuit and a compensating circuit, an integration of design of structure was achieved. Volume of sensor is diminished obviously. Simultaneously, zero drift is decreased under ensuring high sensitivity and resolution ratio. Integrated design also enlarges the range of work temperature, and reduces cost of products.

Abstract: Use the photoelectric device-linear CCD as a measurement tool, and use the SCM for the data acquisition and data processing, a diameter measurement system which is a low costing, high-precision, non direct contact, can be created. The system can provide diameter real-time monitor to pipe production process.

Abstract: In order to achieve rapid detection of naphthalene content in water, the electrochemical biosensor has been developed based on microcontroller by the cyclic voltammetry (CV). The system is consisted of a three-electrode electrochemical system, converting circuit, IAP15F2K61S2 microcontroller and display unit. The voltammetric oxidation-reduction response of a bare gold electrode has been gained in a potential window from −0.3 V to +0.6V. After data acquisition and processing, according to the change of peak current of voltammograms, the naphthalene content is detected and displayed.the sensor can finish the detection of naphthalene content in 15 minutes.

Abstract: Fly ashes collected in Air Pollution Control lines of Municipal Solid Waste Incinerators (MSWI) differ highly from fly ashes generated during coal burning what complicates their utilization in building materials production. Nevertheless after a treatment such ashes can have properties relatively comparable with coal fly ashes and thus can be used as Supplementary Cementitious Material (SCM). The water extracted MSWI fly ash was used as partial Portland cement replacement in mortars. The mortars strength evolution in time was monitored; behavior typical for pozzolans – slower increase of strength – was observed. Influence of thermal load on strength of mortars was studied as well. It can be concluded that water extracted MSWI fly ash can be used as 10 % Portland cement substitute without loss of mechanical properties.

Abstract: Presents the working principle of Integrated PLL chip Si4133, this paper presents the implementation of a 375MHz local oscillator for a super heterodyne transmitter/receiver by using Si4133.Using programming method to set the divider register Internal chip. In addition, this paper discuss the methods for decreases the phase noise. Debugging circuit using ICCAVR software , and show the debugging results. Facts show that the phase noise and spurious of the frequency synthesizer is low, and it is practical.