Comparative analysis of seismic refraction attributes from a designed automated seismic refraction hammer (ASRH) and the convectional sledge hammer. – A. J. Ilozobhie and U.D. Afangideh
For the past years, the manual sledge hammer has been the commonest seismic energy source particularly for seismic refraction surveys on land among students in our tertiary institution. Its observable limitation has been a general decrease in the efficiency and effectiveness of field data acquisition processes since the human energy is usually employed. An Automated Seismic Refraction Hammer was designed and constructed to overcome some of these notably limitations. It uses a controlled impact, detachable hammer – strike technology. A comparative investigation was done between the conventional hammer and the Automated Seismic Refraction Hammer (A.S.R.H.). The seismic record of the A.S.R.H. was observed to offer higher resolution reflections with a faster travel time. The received reflected signal also showed that the generated seismic energy could illuminate a target to a depth of about 20 – 25m. Moreover, the machine could be programmed (with a delay range of 0 – 15 seconds) to generate repeatable seismic signals needed for modern seismic data processing technique. The resulting performance characteristics of this seismic source makes it a simple, reliable and convenient seismic energy source suitable for near surface seismic engineering surveys, archeological works and refraction micro tremors studies.