The acquisition of electrochemical response spectra by on-line fast fourier transform. Data processing in electrochemistry

1976 ◽  
Vol 48 (2) ◽  
pp. 221A-240 ◽  
Author(s):  
Donald E. Smith
Keyword(s):  
Fourier Transform ◽  
Data Processing ◽  
Fast Fourier Transform ◽  
Response Spectra ◽  
Electrochemical Response ◽  
On Line

scholarly journals Real-Time Monitoring of Micro-Electricity Generation Through the Voltage Across a Storage Capacitor Charged by a Simple Microbial Fuel Cell Reactor with Fast Fourier Transform

Energies ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2610 ◽  
Author(s):  
Jung-Chieh Su ◽  
Szu-Ching Tang ◽  
Po-Jui Su ◽  
Jung-Jeng Su
Keyword(s):  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Microbial Fuel Cells ◽  
Oxygen Demand ◽  
Electricity Production ◽  
Storage Capacitor ◽  
Anaerobic Sludge ◽  
Piggery Wastewater ◽  
On Line ◽  
Cell Reactor

The pattern of micro-electricity production of simple two-chamber microbial fuel cells (MFC) was monitored in this study. Piggery wastewater and anaerobic sludge served as fuel and inocula for the MFC, respectively. The output power, including voltage and current generation, of triplicate MFCs was measured using an on-line monitoring system. The maximum voltage obtained among the triplicates was 0.663 V. We also found that removal efficiency of chemical oxygen demand (COD) and biochemical oxygen demand (BOD) in the piggery wastewater was 94.99 and 98.63%, respectively. Moreover, analytical results of Fast Fourier Transform (FFT) demonstrated that the output current comprised alternating current (AC) and direct current (DC) components, ranging from mA to μA.

The Application of Fast Fourier Transform and Convolution Techniques to Picosecond Continuum Spectroscopy

1983 ◽  
Vol 37 (3) ◽  
pp. 273-279 ◽  
Author(s):  
K. L. Sala ◽  
R. W. Yip ◽  
R. LeSage
Keyword(s):  
Fourier Transform ◽  
Data Processing ◽  
Data Acquisition ◽  
Fast Fourier Transform ◽  
Experimental Technique ◽  
Transient Absorption ◽  
Computation Time ◽  
Spectroscopic Technique ◽  
Experimental Results ◽  
Data Acquisition And Processing

The use of the fast Fourier transform in the processing of photographic data obtained from picosecond continuum spectroscopy is described. The resulting reduction in the complexity and computation time has permitted all of the data acquisition and processing to be carried out with an eight-bit microcomputer. Specific examples of some key problems in the data processing that are peculiar to this spectroscopic technique and methods of overcoming these problems are discussed. Experimental results that serve to illustrate both the experimental technique itself as well as the versatility and reliability of the data processing algorithm are presented for the transient absorption of a Cr(III) complex in solutions.

scholarly journals Diagnosis of rotor faults by fast Fourier transform using an auxiliary winding voltage

2021 ◽  
Vol 24 (2) ◽  
pp. 680
Author(s):  
Yakout Khadouj Jelbaoui ◽  
Lamiaa El Menzhi ◽  
Abdallah Saad
Keyword(s):  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Early Stage ◽  
Induction Machine ◽  
Load Level ◽  
Maintenance Cost ◽  
Fast Fourier Transform Analysis ◽  
Squirrel Cage ◽  
On Line ◽  
System Breakdown

<p>Condition monitoring and on-line detection have attracted several researchers in order to carry out an efficient diagnosis of machine failures. Therefore, the detection in early stage avoids system breakdown and reduce the maintenance cost. This paper presents a new diagnosic approach to detect the broken bars and broken end ring faults for a squirrel cage induction machine based on the fast Fourier transform analysis applied on a new signature as the voltage of an auxiliary winding. The auxiliary winding is a small coil inserted between two of the stator phases, the explicit expression of its voltage is presented. The signal is monitored in six faults cases under a different load level, the emergence of the fault frequencies changes for each kind of failure. The successfully simulation results obtained show the effectiveness of this approach.</p>

High speed synchronous data generation and sampler system: application to on-line fast Fourier transform faradaic admittance measurements

1977 ◽  
Vol 49 (12) ◽  
pp. 1797-1805 ◽  
Author(s):  
R. J. Schwall ◽  
A. M. Bond ◽  
R. J. Loyd ◽  
J. G. Larsen ◽  
D. E. Smith
Keyword(s):  
Fourier Transform ◽  
Fast Fourier Transform ◽  
System Application ◽  
High Speed ◽  
Data Generation ◽  
On Line

scholarly journals IDENTIFIKASI ASPEK GELOMBANG BUNYI KELUARAN ALAT MUSIK SASANDO TRADISIONAL DAN SASANDO ELEKTRIK

2020 ◽  
Vol 5 (2) ◽  
pp. 100-107
Author(s):  
Martince Aryani Jusuf Kaba ◽  
Ali Warsito ◽  
Laura A.S Lapono
Keyword(s):  
Fourier Transform ◽  
Data Processing ◽  
Fast Fourier Transform ◽  
Sound Wave ◽  
Musical Instruments ◽  
Original Sample ◽  
Intensity Noise ◽  
Sound Waves ◽  
The Subject ◽  
Frequency Intensity

ABSTRAK Telah dilakukan penelitian tentang identifikasi aspek gelombang bunyi alat musik sasando tradisional dan sasando elektrik. Subjek penelitian ini adalah bunyi alat musik sasando tradisional dan sasando elektrik yang bertipe sasando biola dengan jumlah dawai 32. Bunyi alat musik sasando direkam dengan mikrofon Havit Straight M-80 dan dianalisis menggunakan perangkat lunak Wavepad sound editor. Aspek gelombang bunyi ditentukan dengan menggunakan metode Fast Fourier Transform (FFT). Sampel original bunyi sasando tradisional dan sasando elektrik dengan rentang frekuensi dari 86 Hz sampai 1206 Hz dan 97 Hz sampai 1077 Hz. Rentang intensitas dari sasando tradisional dan sasando elektrik secara berturut-turut (-45,95398906) dB sampai (-12,38564365) dB dan (-33,44661942) dB sampai (-9,780729931) dB. Kemudian dengan perangkat lunak excel diperoleh grafik data bunyi sasando tradisional dan sasando elektrik berupa grafik intensitas, frekuensi dan noise. Setelah dilakukan filter terhadap sampel original bunyi sasando tradisional dan sasando elektrik, yang mempengaruhi kualitas gelombang bunyi adalah adalah rentang noise pada sampel bunyi  dari pengolahan data -2 dB sampai 0 dB dan -4,22  dB sampai -0,14 dB dengan persentase noise 0 % sampai 8,27 % dan 0,57 % sampai 22,76 %. Sebagian besar persentasi noise berpengaruh pada bunyi asli.   Kata Kunci: Sasando, sampel original, mikrofon Havit Straight M-80, Wavepad sound editor, metode Fast Fourier Transform (FFT), frekuensi, intensitas, noise.   ABSTRACT Research has been conducted on the identification of aspects of the sound waves of traditional Sasando musical instruments and Sasando electric. The subject of this research is the sound of traditional Sasando musical instruments and Sasando electric type of Sasando violin with 32 strings. The sounds of Sasando musical instruments were recorded with the Havit Straight M-80 microphone and analyzed using Wavepad sound editor software. Sound wave aspects are determined using the Fast Fourier Transform (FFT) method. Original samples of traditional Sasando sound and Sasando electric range in frequency from 86 Hz to 1206 Hz and 97 Hz to 1077 Hz. The intensity ranges from traditional Sasando and Sasando electric are (-45,95398906) dB to (-12,38564365) dB and (-33,44661942) dB to (-9,780729931) dB. Then with Excel software obtained data graphs of traditional Sasando sound and Sasando electric in the form of graphs of intensity, frequency and noise. After filtering the original samples of traditional Sasando sound and Sasando electric, what affects the sound wave quality is the range of noise in the sound sample from data processing of -2 dB to 0 dB and -4.22 dB to -0.14 dB with a percentage of noise 0 % to 8.27% and 0.57% to 22.76%. Most of the noise percentage affects the original sound. Keywords: Sasando, original sample, Havit Straight M-80 microphone, Wavepad sound editor, Fast Fourier Transform (FFT) method, frequency, intensity, noise.

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