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This paper puts forward a strategy of intellectualized fire monitor based on ZigBee transmission. In this system, a low power, multi-parameter composite fire detection node is used, which can detect temperature, smoke concentration and CO gas concentration. The hardware and software implementation are based on 2.4GHz wireless communication chip CC2430. ZigBee protocol is adopted in the system to form...
Hierarchical fuzzy control can process distributed control parameters, reduce the number of fuzzy rules effectively and easily extract fuzzy rules, so it is suitable for non-linear temperature control for industrial furnaces with features, such as large capacity and long time-delay. But rule sets and membership functions in conventional fuzzy control are often pre-determined according to human experiences...
A digital decimation filter used in Δ-Σ - ADC is designed and introduced in this paper. The designed filter has a multi-stage structure which is comprised of a stage CIC filter, two stage half-band filters, and a stage compensation filter. The CSD coding, “Hognenauer cut-off theory”, frequency response masking approach and some other techniques are used to improve the performance of the chip and reduce...
In this paper, on the basis of full investigation and a lot of comparison with expert systems at home and abroad, introducing Web technology, WebGIS and BP neural network technology into expert system and taking full use of their respective advantages, we have designed and developed a remote diagnosis and control expert system for citrus agricultural diseases and insect pests based on WebGIS and BP...
Industrial heating furnace has a great deal of special characteristics such as big capacity, long lag and non-linear trait, etc. In order to control it better, we present a sort of two-stage fuzzy temperature control algorithm. The first-stage controller is responsible for determining the control variable according to deviation information of controlled variable. The second-stage controller takes...
In this paper, we have studied high-speed network congestion control problem from two levels of end system and communication subnet. First of all, a high-speed network congestion control model is presented based on HSTCP algorithm. From the aspect of control theory, we research AQM algorithm in communication subnet of high-speed network and give a design method of AQM controller based on genetic neural...
A scheme is promoted which builds a water-saving irrigation system based on wireless sensor network and fuzzy control technology, we design a wireless sensor network, which consists of sensor node cluster, coordinator node and irrigation controller nodes. Here sensor node cluster is responsible for gathering information such as soil moisture and regularly send it to the coordinator node. Fuzzy controller...
In order to enhance the interoperability of device in EPA industry network control system, the characteristics of XDDL, the application flow and functions of EPA device description were discussed. The latest methods of XML parsing and the utilization efficiency of the device description data after being parsed were analyzed. A kind of parsing method and a double buffers technology used for device...
In this paper, we have made a comprehensive study about the key technologies including applying wireless sensor networks to the traffic monitoring network, its traffic flow forecast based on gray forecasting model and traffic congestion control. According to the features that wireless sensor networks have no space constraints, flexible distribution, mobile convenience and quick reaction, we present...
On the basis of research on fuzzy traffic control algorithm for a single intersection, we present a new adjustable multi-phase sequence fuzzy control algorithm. By this method, not only the traffic flow of every phase is considered, but also the green time and red time. Base on this algorithm, a two-stage fuzzy control system which consist of the green time delay module and phase selection module...
For solving the problem of poor quality and waste of electric energy coursed by water supply mode of a high water tower and a direct water pump, introduce a constant pressure supply water system, which adopts embedded fuzzy control technology, using PLC and frequency convener as its core. When the system runs, water pressure of the pipe is inputted into the PLC from terminal X0 through pressure transmitter...
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