Transient methods for the measurement of thermophysical properties: The pulse transient method

2002 ◽  
Vol 34 (5) ◽  
pp. 505-514 ◽  
Author(s):  
L'udovít Kubičár ◽  
Vlastimil Boháč ◽  
Viliam Vretenár
Keyword(s):  
Thermophysical Properties ◽  
Transient Method ◽  
Pulse Transient Method ◽  
Transient Methods

Thermophysical Properties of Heterogeneous Structures Measured by Pulse Transient Method

2005 ◽  
Vol 26 (6) ◽  
pp. 1949-1962 ◽  
Author(s):  
L’. Kubičár ◽  
V. Bohač ◽  
V. Vretanár ◽  
Š. Barta ◽  
G. Neuer ◽  
...  
Keyword(s):  
Thermophysical Properties ◽  
Transient Method ◽  
Pulse Transient Method ◽  
Heterogeneous Structures

scholarly journals Erratum to: Thermophysical Properties of Heterogeneous Structures Measured by Pulse Transient Method

2014 ◽  
Vol 35 (5) ◽  
pp. 970-970
Author(s):  
L’. Kubičár ◽  
V. Bohač ◽  
V. Vretenár ◽  
Š. Barta ◽  
G. Neuer ◽  
...  
Keyword(s):  
Thermophysical Properties ◽  
Transient Method ◽  
Pulse Transient Method ◽  
Heterogeneous Structures

scholarly journals Leakage Detection in Pipeline using Wavelet Transform Method

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Mohd Fairusham Ghazali ◽  
Abdul Kadir Samta
Keyword(s):  
Signal Processing ◽  
Wavelet Transform ◽  
Correlation Analysis ◽  
Pipeline System ◽  
Leakage Detection ◽  
Transient Method ◽  
Research Project ◽  
Transform Method ◽  
Cepstrum Analysis ◽  
Transient Methods

This research project is focusing on the leakage detection in the pipelines using wavelet and cepstrum analysis. To fully complete this research project, experimental and analysis by using signal processing are required. This research project proposed a technique which is a transient method. The basic principle is the fact that water spouting out of a leak in a pressurized pipe generates a signal, and this signal contains information to whether a leak exists and where it is located. The present transient methods for finding leaks are mainly based upon correlation analysis, where one sensing device is installed at each side of a leak. This method is hard to operate because it needs many operators to operate it due to equipment in different place. This research project proposed a wavelet transform method to detect leakage in the pipeline system. The experimental results show appears  to improve the ability of the method to identify features in the signal.

Thermophysical Analysis of Sandstone by Pulse Transient Method

2006 ◽  
Vol 27 (1) ◽  
pp. 220-234 ◽  
Author(s):  
L’ Kubičár ◽  
V. Vretenár ◽  
V. Boháč ◽  
P. Tiano
Keyword(s):  
Transient Method ◽  
Pulse Transient Method

Use of the pulse transient method to investigate the thermal properties of two porous materials

2003 ◽  
Vol 35/36 (1) ◽  
pp. 67-74 ◽  
Author(s):  
Vlastimil Boháč ◽  
L'udovít Kubičár ◽  
Viliam Vretenár
Keyword(s):  
Thermal Properties ◽  
Porous Materials ◽  
Transient Method ◽  
Pulse Transient Method

A COMPARISON OF THE VARIOUS PARAMETERS EMPLOYED IN THE VARIABLE‐FREQUENCY INDUCED‐POLARIZATION METHOD

Geophysics ◽  
1964 ◽  
Vol 29 (3) ◽  
pp. 425-433 ◽  
Author(s):  
Philip G. Hallof
Keyword(s):  
Induced Polarization ◽  
Frequency Effect ◽  
Variable Frequency ◽  
Transient Method ◽  
Polarization Method ◽  
Applied Current ◽  
Frequency Method ◽  
Pulse Transient Method ◽  
Factor Data ◽  
The Time Domain

The increased use of the induced‐polarization method in recent years has resulted in two methods of measurement. The measurements in the frequency domain (variable‐frequency method) rely on changes in the apparent resistivities measured as the frequency of the applied current is varied. The measurement in the time domain (pulse‐transient method) detects transients in the measured potentials when the applied current is interrupted. The “chargeability” is the parameter used in the pulse‐transient method, while both the “frequency effect” and the normalized parameter “metal factor” are used in the variable‐frequency method. The most useful parameter would be the one which best indicates the amount of metallic mineralization present. Eight sets of field results from variable‐frequency field surveys are shown. The cases are shown in pairs; in each pair, the geometry of the source is much the same. By comparing the resistivity, the frequency effect (chargeability), and metal‐factor data with the amount of mineralization indicated by the drilling results, the usefulness of these parameters can be evaluated.

Sign in / Sign up

Export Citation Format

Share Document