Microcontroller-based instrument for measuring methane concentration

Date

10-2005

Degree

Bachelor of Science in Applied Physics

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Meredith Anne C. Sotto

Abstract

A portable microcontroller-based instrument for measuring methane concentration was fabricated using Atmega 16 microcontrollcr. The TGS2611 methane sensor was interfaced into the system. The system was designed to automatically collect data from the sensor every minute, and store them in non-volatile memory for retrieval using serial interface to a personal computer. The study has four main parts namely hardware design, software design, calibration, and data acquisition and storage. The ATmegal 6 was used to perform the data collection, data storage, and data display and retrieval. The sensor used was calibrated against standard concentrations of methane. The system was subjected to 2 hours of data gathering on manure pits, one hour for the closed pit and another hour for an open pit. Methane concentrations ranging approximately 4000 — 12000 ppm were observed for the closed pit, while for an open pit the readings obtained ranges —75 — 17000 ppm. Also, the device was exposed with a fixed methane concentration of 8000 ppm, and the sensor's reading stabilized after a certain time and the results are very precise with the standard. From this result, it shows that the device can be used for monitoring methane concentrations.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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