Advanced Materials Research Vol. 1037

Abstract: based on the infrared detectors, brightness sensor, acoustic sensor sensing device for the lighting area, For signal collection, transform acquisition signal through conversion circuit and send to STM32F103 chip, control signals by microcontroller control drive circuit. According to the characteristics of the AC LED circuit, drive circuit with bidirectional thyristor as a core device design, the system can realize AC LED lighting intelligent open a brightness control. Testing by the actual circuit, circuit work is stable and reliable, has reached the design requirements.

Abstract: Power lithium ion batteries in series is easy to appear equilibrium problem when charging and discharging, lead to shorten battery life,even more serious safety problems would appear, this special environment for coal mine, we design a two-way type non-destructive equilibrium circuit, can be a very good solution to the problem of battery charge imbalance.

Abstract: To make full use of green time of each phase to alleviate congestion in urban isolated intersections, an optimization algorithm of real-timing signal control is proposed. By monitoring traffic flow at the isolated intersection, the average utilization rate of green time of each phase is calculated. The green time of each phase is then adjusted automatically to maintain a balanced green time utilization rate with the presented optimization algorithm. Simulation results indicate that the average delay and the queue length of the presented algorithm are less than the fixed-time signal plan at peak times, and the efficiency of the intersection traffic is improved.

Abstract: For chemical disaster having a wide range, often accompanied by fire, smoke, toxic gases and other complex conditions, it make use of swarm robotics to achieve rapid access to information on the disaster site. This study is based on GPS module, magnetic sensors and ultrasonic array integrated navigation method, so that the robot can autonomously select the sport, avoiding obstacles for regional searches. The robot according to their current situation and interact with neighboring robots information, updated in real time decision-making, self-optimization of the search path, and the process of moving all the information collected is sent wirelessly to a remote data processing system. Processing system achieves the disaster site and submitted to the relevant reproduction panoramic rescue department, for the first time to develop optimal rescue plan to provide important technical support. In the laboratory level, the paper completed the entire system architecture to achieve a major part of the relevant hardware and software tests. Experimental results show that the feasibility of this design is accurate and reliable.

Abstract: Aiming at the problem that there are many .NET based software need to access COM based OPC servers. This article developed an OPC client for .NET based advanced control software. Firstly, this article introduces the structural characteristics of OPC, then describes the whole process to develop this client software, and finally shows the experiments result that the client could access data with an OPC server stabilized. This client could be a good solution to solve the communication problem between .NET and COM platforms.

Abstract: The main aim of this paper is to improve the control efficiency of the sewage treatment system, by analyzing the various control parameters of sewage treatment system and comparing different ways of automatic control, Siemens S7-200 Programmable Logic Controller(PLC) is applied to the system. We designed the control flow charts of coarse grid and dewatering system, compiled the total manual program and automatic control program of aerated grit chamber by using STEP 7-Micro/WIN 32 software, and realized the related equipment automatic control in the sewage treatment system which can run the coarse grid machine that runs for 20 minutes and stops for 2 hours alternately et cetera. The results show that the controllability of sewage treatment system is enhanced and the efficiency is improved.

Abstract: By analysis the difference of applying the rough set method and the neural network method to pattern recognition, a improved recognition method that the rough set method is the front system of neural network was produced. the advantages of this method is that the knowledge representation system is reduced without affecting the recognition precision, so the complexity of neural network system and the time of calculating the attribute value is declined ; at the same time ,the neural network as the postpositional system has the tolerance and anti-jamming capability, but it is difficult to do this with rough set method. The example about how to combine these two methods and conclusions from this combination was given.

Abstract: In order to diagnose the economic performance of unit online, a new algorithm to forecast the exhaust enthalpy in the steam turbine online based on RBF process neural network with to hidden layers neural network is introduced in this paper. This online forecasting method establishes the complicated relation model between the steam turbine exhaust enthalpy and the relative operating parameters. The enthalpy of the last stage extraction steam and that of the exhaust are online calculated for a 300MW set in this paper. The example result shows that this method can accurately forecast the steam turbine exhaust enthalpy and the model is simple, accurate and convergence. This is an effective and feasible predicting method.

Abstract: The ant colony optimization algorithm is applied in the fault diagnosis of the production equipment, on the basis of the study of it, the relative fault diagnosis model was established. According to the data of a kind of chemical reactor, the eight values of different state were extracted and used to train the fault diagnosis model. The result of the test is turned out to be accurate and the application of such a kind of algorithm is a high-quality approach to fault diagnosis.

Abstract: By applying improved ant colony algorithm, this paper analyzed multi-objective design problem in optimal design of cam mechanism profile curve, which were then transformed into TSP problem, that is, multi-objective function minimization problem into TSP shortest path searching problem. For the multiple complex variables and target weight parameters in design, a concept of multidimensional space node in ant colony optimization path was proposed, converting multi-objective function with weight coefficient into a multidimensional space nodes (city).At the same time, improved ant colony algorithm, combined with genetic algorithm, was used to avoid optimization calculation falling into a locally optimal solution. Exemplified by dual objective function in cam mechanism profile curve design, this paper solved optimal value problem of dual objective optimization design involving the biggest fullness coefficient and minimum abrasion quantity of variable weight coefficient under the three-dimensional parameters n, m and w.