Hand-held microcontroller- based instrument for detection of lahars and pyroclastic materials
Date
3-2003
Degree
Bachelor of Science in Applied Physics
College
College of Arts and Sciences (CAS)
Adviser/Committee Chair
Nelio C. Altoveros
Abstract
A highly sensitive and stable magnetic detection instrument with directional capabilities was developed to measure the magnitude and direction of the magnetic field stored in pyroclastic flows and lahars. The 3517 Allegro sensor used in the instrument was based on the fluxgate, hall-effect principle. An amplifier circuit was constructed to condition the signal from the sensor The instrument was interfaced to an AT90S8515 microcontroller using a 12-bit analog to digital converter (ADC). A software program was developed using Image Craft C programming language for processing and display of data to a liquid crystal display (LCD). The instrument was calibrated by applying different magnetic field intensities and was tested on rock samples in Buyuan channel, Mayon Volcano. Brgy. Buyuan. Legaspi City. The instrument was successfully used in detecting pyroclastic flows and lahars present along the Buyuan channel through measurement of the intensity and direction of their magnetic fields.
Language
English
Location
UPLB Main Library Special Collections Section (USCS)
Call Number
Thesis
Recommended Citation
Gatchalian, Gracelyn L., "Hand-held microcontroller- based instrument for detection of lahars and pyroclastic materials" (2003). Undergraduate Theses. 10410.
https://www.ukdr.uplb.edu.ph/etd-undergrad/10410
Document Type
Thesis