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To solve the problem that the navigation accuracy of substation patrol car is not high and the current navigation rail construction is expensive, a method of navigation and positioning based on image recognition is proposed. The method is that, firstly, print the special pattern at a fixed distance on the inspection path. Then, the navigation camera fixed on the car collect the images vertically....
Based on the existing algorithm of fault-sectin location in distributed network containing distributed generation(DG), the effect of localization is not ideal, especially premature convergence problem in the original genetic algorithm, a new fault location method of chaotic optimization based on multiple-population genetic algorithm is proposed. Firstly, the introduction of a number of population...
The basic principle of Fryze-Buchholz-Dpenbrock (FBD) theory is analyzed, which is used to construct the static var compensator(SVC) control strategy. In order to avoid the limitation of low pass filter(LPF), the least-mean-square(LMS) adaptive filter theory is combined with FBD algorithm to detect fundamental positive and negative sequence currents, which are used to calculate the equivalent susceptance...
Aiming at the problem of slow convergence and local optimum in motor fault diagnosis, a new method of motor fault diagnosis based on fuzzy petri net was proposed, in order to improve the accuracy of fuzzy petri network diagnosis system, the mutative scale back propagation(BP) algorithm was used to optimize the network parameters, then the classification of several kinds of motor faults were completed...
ADE7758, ATT7022B and MAXQ3180 are three kinds of Three-phase multifunctional energy metering IC. In the first place, this paper gives an introduction of the three chips on theory of operation. After that, particular contrast is carried out on performance. Finally, the conclusion is summarized. ADE7758 supplies per phase information, but it does not supply power-factor, phasor or three-phase information,...
Data dissemination in vehicular ad hoc networks (VANETs) has recently received considerable attention. Due to the unique characteristics of VANET, the implementation of reliable data dissemination among vehicles has encountered many challenges. In this paper, a reliable and efficient data dissemination scheme is presented. Relative locations between neighbor vehicles are predicted to improve delivery...
Focusing on the key problem of transformer protection malfunction caused by the inrush current, this paper analyses the transient mechanism, establishes mathematical model, studies inrush current quantitatively by derivation of equation firstly. On this basis, the simulation models of inrush current and short circuit current are established on the simulation platform PSCAD/EMTDC, the wavelet multi-resolution...
Based on the requirements of egg quality check, this paper offers several methods for egg quality check using acoustic properties, optical properties and electrical characteristics. It can detect eggs on volume, weight, empty, crack and metamorphism, etc. So the eggs can be classified by quality.
In this paper, it expounded in detail the principle of energy spectrum analysis based on Discrete Wavelet Transform and Multi-resolution Analysis. In the aspect of study on feature extraction method, with investigating the feature of impact factor in vibration signals and considering the non-placidity and nonlinear of vibration diagnosis signals, this paper imported wavelet analysis and fractal theory...
Wireless sensor networks (WSNs) is a novel technology, which is developed with the advancement of micro-electronic, computing, and wireless communication technology. WSNs has merits of distributed information processing, covering broadly, and remote monitoring and control. Considering the disperse deployment, wind power resource random and seasonal characteristic in wind plant, we apply WSNs to SCADA...
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