Title :
Nonintrusive sensing techniques for the discrimination of energized electric cables
Author :
Mamishev, Alexandler V. ; Short, Shayne X. ; Kao, Ta-Wei ; Russell, B. Don
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
4/1/1996 12:00:00 AM
Abstract :
The implementation of a piezoelectric acoustic sensor for nonintrusive detection of the energization status of 3-φ electric power cables is presented. Simultaneous excitation of a piezoelectric crystal by acoustic vibrations and electric field may occur. The Fourier spectral analysis of the sensor´s output signal is used to determine the current loading status of the cable. Test results are included for both shielded and nonshielded 3-φ cables. Also, the possible use of an optical fiber interferometer for acoustic wave detection is discussed
Keywords :
Fabry-Perot interferometers; Fourier analysis; acoustic signal detection; cable sheathing; electric current measurement; fibre optic sensors; lead compounds; piezoceramics; piezoelectric transducers; power cable testing; power cables; spectral analysis; surface acoustic wave sensors; surface acoustic wave signal processing; underground cables; 120 Hz; 3-φ electric power cables; Fabry-Perot interferometer; Fourier spectral analysis; PZT; PZT sensing element; PbZrO3TiO3; SAW sensor; acoustic wave detection; current loading status; discrimination; energization status; energized electric cables; nonintrusive detection; nonintrusive sensing techniques; nonshielded cables; optical fiber interferometer; piezoelectric accelerometer; piezoelectric acoustic sensor; shielded cables; simultaneous excitation; underground cables; Accelerometers; Acoustic sensors; Acoustic signal detection; Acoustic waves; Conductors; Frequency; Magnetic fields; Optical fiber cables; Personnel; Surface acoustic waves;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
