| Title |
Automated Analysis for PDC-R Technique by Multiple Filtering |
| Authors |
조성호 ; Rahman Norinah Abd ; Hassanul Raja |
| Keywords |
site investigation;urban sites;electrical resistivity;PDC-R technique;electrical noises;지반조사;도심지 지반;전기비저항;PDC-R 기법;전기 잡음 |
| Abstract |
Electrical noises like self potential, burst noises and 60-㎐ electrical noises are one of the causes to reduce reliability of electrical resistivity survey. Even the PDC-R (Pseudo DC resisitivity) technique, recently developed, is suffering from the problem of low reliability due to electrical noises. That is, both DC-based and AC-based resistivity technique is subject to reliability problem due to electrical noises embedded in urban geotechnical sites. In this research, a new technique to enhance reliability of the PDC-R technique by minimizing influence of electrical noises was proposed. In addition, an automated procedure was also proposed to facilitate data analysis and interpretation of PDC-R measurements. The proposed technique is composed of two steps: 1. to extract information only related with the input current by means of multiple-filter technique, and 2. to undertake a task to sort out signal information only to show stable and reliable characteristics. This automated procedure was verified by a synthetic harmonic wave including DC shift, burst random noises and 60-Hz electrical noises. Also the procedure was applied to site investigation at urban areas for proving its feasibility and accuracy. |