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As people's water consumption become large and large in china, people begin to expect high requirements of water quality. However, some waterworks' monitoring system cannot automatically detect and process water quality parameters and system operation status. Therefore, staffs have to manual meter reading. The paper first discusses the design of the whole system, including the server side and the...
AES encryption algorithm and digital signal processing (DSP) technology are used in image encryption transmission system to make sure the information security and confidentiality in this paper. The basic principles, structure of the algorithm and design skills are introduced and analyzed. The program design is realized in DSP environment. An overall scheme of the image encryption transmission system...
The simulation algorithm based on the field of power electronics and motor control areas of application package software simulation (PSIM) for array of photovoltaic cells in a certain light maximum power point tracking (MPPT) had been built, different simulation step by analysis of the impact of MPPT. Simulation results show that: the model parameters of an array of photovoltaic cells correspond exactly...
To meet the needs of employees growing, training costs increase and better resources sharing, a UML-based instant communication system of enterprise was established to implement study, exchange and training inside enterprise. The paper analyzes in detail the UML modeling based on the system requirement and designs the use-case model, static model and dynamic model which give a kind of visual framework...
In this paper, the design process of Three Phase Network Parameter Monitoring System is analyzed and the overall research scheme and design idea of the system are expounded. This paper mainly studies how to improve the accuracy of input voltage and current. The front-end voltage decreasing, current dropping circuit and remote data transmission circuit are designed. The programs of the data acquisition...
Owing to the complexity of the photovoltaic system structure and their environment, especially under the partial shadows environment, the output characteristics of photovoltaic arrays are greatly affected. Under the partial shadows environment, power-voltage (P-V) characteristics curve is of multi-peak. This makes that it is a difficult task to track the actual maximum power point. In addition, most...
To implement the informatization management of water supply pipe network, the paper introduces the general design of a wireless monitoring system for water supply pipe network based on ARM and GPRS technology, including the implement of the hardware and software of the monitor terminal. The monitor terminal was designed based on LPC2210 MPU and could collect the data of supply pipe network such as...
This paper proposes a design about sewage-source Heat Pump - Remote Monitoring System based on Web access internet configuration software. The main purpose of this design is to achieve the remote monitoring device parameters, and provide data reference for a comprehensive evaluation of technical indicators of Sewage source heat pump system. The article analyzes the process flow of sewage source heat...
A Versatile simulation model for photovoltaic array is developed based on the DC physical model of photovoltaic (PV) module under PSIM environment. The I-V, P-V characteristics of photovoltaic array with different combinations can be simulated by the model. In addition, the model includes the function of Maximum Power Point Tracking (MPPT) and completes the simulation of the perturbation and observation...
The paper presents a Photovoltaic (PV) Inverter System based on TMS320F28027 that can not only achieve single phase DC/AC converting by a full-bridge inverter, but also realize the function of same phase-frequency between sine waveform generated from PV Inverter System and the reference waveform from grid. Furthermore, the single phase DC/VC converting is controlled by means of SPWM generated by taking...
In order to better meet the demand of monitoring indoor environmental quality in some applications, this paper presents a scheme of design and implementation of indoor environmental monitoring system based on JN5139 SOC. The system takes full advantages of ZigBee technology of JN5139 SOC chip in wireless sensor network design and implementation to realize the hardware design of wireless sensor nodes...
In this paper, the process, monitoring data and the economic indicators of the system are analyzed. The research scheme and the design concept of the system are discussed. The paper focuses on researching the building mathematic model of the system economic indicators and the data-processing methods. It achieved the aim of displaying five economic indicators including the insurance rate of solar energy,...
A new method of soft sensing based on process neural network (PNN) is proposed in this paper. PNN is an extent of traditional neural network, and it is a new configuration of artificial neural network put forward in recent years. The thesis discuss some modified algorithms for raising training speed of PNN, these algorithms are based on function orthogonal basis expansion which exist low-speed convergence...
Soft sensing method was proposed for determination of effluent BOD from SBR and its principle was introduced, the method was based on the radial basic function (RBF) artificial neural network. The RBF neural network was trained and simulated by a lot of observed data, and the result showed that the RBF neural network may be used to fulfil soft sensing for effluent BOD from SBR, so as to create condition...
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