A design of a three phase AC sampling module for an electricity information acquisition device

2015 ◽  
pp. 203-208
Author(s):  
H Sun ◽  
R Zhang ◽  
K Zhou ◽  
J Ye
Keyword(s):  
Information Acquisition ◽  
Ac Sampling ◽  
Three Phase ◽  
Acquisition Device

A New Portable Harmonic Analyzer Based on MSP430

2014 ◽  
Vol 971-973 ◽  
pp. 1059-1063
Author(s):  
Li Qing Zhou ◽  
Da Xu ◽  
Shuang Hu ◽  
Peng Xu
Keyword(s):  
Frequency Estimation ◽  
Power Grid ◽  
Sampling Technique ◽  
Digital Instrument ◽  
Signal Conditioning ◽  
Phase Voltage ◽  
Ac Sampling ◽  
Harmonic Analyzer ◽  
Leakage Effect ◽  
Three Phase

In this paper, a new portable digital instrument is developed to measure the frequency, rms voltage, rms current and harmonic of power grid. Three phase voltage and current are sensed with precise transformer and then processed by signal conditioning unit before sampling. Synchronous AC sampling technique is introduced to avoid leakage effect of FFT. Consequently, frequency estimation, rms measurement and harmonic estimation are achieved based on MSP430. The experiment results indicate that this analyzer provides accurate frequency estimates with error in the range of 0.001Hz and amplitude estimates with error in the range of 0.1%, which can meet the need of offline application.

An Information Acquisition Device for Driver Training Operation with MEMS Transduce

2012 ◽  
Vol 198-199 ◽  
pp. 1250-1255
Author(s):  
Xia Yang ◽  
Kai Yin ◽  
Hai Ying Liu ◽  
Hong Da Li
Keyword(s):  
Real Time ◽  
Information Acquisition ◽  
Three Dimensional ◽  
Characteristic Analysis ◽  
Driver Training ◽  
New Approach ◽  
Related Data ◽  
Existing Problems ◽  
Acquisition Device ◽  
Change Curve

In this paper, based on characteristic analysis of driver training operation, a new approach of information acquisition for driver training is found, which is through extracting acceleration information. The information acquisition device which is under MEMS three-axis acceleration transducer, based on ADXL335 and MCU, can achieve real-time and accurate measurement of vehicles’ three-dimensional acceleration. By comparing the change curve of measured acceleration with the related data of good driver, the existing problems will be found out. In this way, the driver training operation can be assessed in a timely way.

A Method to Create the Traffic Accident Scene Graphic Based on Electronic Maps and Information Acquisition Device

2014 ◽  
Vol 496-500 ◽  
pp. 2971-2974
Author(s):  
Wen Jun Liu ◽  
Sen Su ◽  
Fu Ping Wang ◽  
Kui Li ◽  
Zhi Yong Yin
Keyword(s):  
Image Processing ◽  
Information Acquisition ◽  
Traffic Accident ◽  
Satellite Images ◽  
Graph Drawing ◽  
Acquisition Device ◽  
Scientific Technical ◽  
Distance Data ◽  
Accident Site ◽  
Accident Scene

This paper presents a method to create the traffic accident scene graphic based on electronic maps and information acquisition device (IAD). The method uses global position system (GPS) and electronic maps to get the satellite images of accident site, and it uses an IAD to obtain the angle and distance data between the origin position determined by the IAD and the locations prepared to be measured in the accident scene. With the data operation and image processing, we can create an isometric traffic accident scene graphic. This method provides the traffic accident spot data collecting, graph drawing and reason analyzing a more convenient and scientific technical means.

The Application of Internet of Things in Crop Production Management Research

2013 ◽  
Vol 765-767 ◽  
pp. 889-893
Author(s):  
Kai Meng Sun
Keyword(s):  
Internet Of Things ◽  
Information Acquisition ◽  
Agricultural Production ◽  
Crop Production ◽  
Production Management ◽  
Solution Method ◽  
Management Research ◽  
Acquisition Device ◽  
Production Research ◽  
Design Idea

The composition, solution, method and design idea of crop information acquisition device applying internet of things were introduced. The applications of internet of things in crop production research were explained, and several technological difficulties and methods were discussed. Meanwhile, the effect and significance of applying internet of things in relevant disciplines of agricultural production were demonstrated.

Applying of FFT Algorithmic in Power Substation Microcomputer Monitoring System Based on DSP2407

2013 ◽  
Vol 753-755 ◽  
pp. 2573-2577
Author(s):  
Ping Wang ◽  
Dui Yuan Li ◽  
Da Rong Zhu ◽  
Guang Zhu
Keyword(s):  
Monitoring System ◽  
Matlab Simulation ◽  
Electrical Parameters ◽  
Sampling System ◽  
Synchronous Sampling ◽  
Ac Sampling ◽  
Three Phase ◽  
Power Substation ◽  
Hardware Processing ◽  
The Mathematical Model

In the detection substation microcomputer AC sampling system , monitor the three-phase voltagethree-phase current , power factor ,power online in real-time. This paper describes a FFT designing idea of the synchronous sampling in AC sampling from the substation monitoring system parameters .It provided sampling and calculation methods to apply DSP, MCU measurement of AC signal , details of the mathematical model of AC electrical parameters digital sampling, the introduction of schematic diagram of hardware processing sampling signal of FFT, comparison of the realization of the software and MATLAB simulation, thus obtained the correctness of this algorithm.

Test of the stability of a three-phase contact line with negative line tension

1999 ◽  
Vol 96 (9) ◽  
pp. 1335-1339 ◽  
Author(s):  
ALAN E. VAN GIESSEN, DIRK JAN BUKMAN, B.
Keyword(s):  
Contact Line ◽  
Line Tension ◽  
Phase Contact ◽  
Three Phase ◽  
The Stability
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