Fabrication and evaluation of an SMS-based early warning system for an automatic weather station.

Date

2013

Degree

Bachelor of Science in Applied Physics

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Altoveros, Nelio C.

Abstract

To provide notice of increased rainfall activity, an Early Warning System (EWS) for an Automatic Weather Station (AWS) was fabrictaed. A Davis Vantage Vue unit was used for the AWS. Two modules were fabricted: the Control module and the EWS module. Gizduino microcontroller boards were used to run each module. The control module acquires data from the AWS and check critical levels of accumulated rainfall. If a certain rainfall level is reached, a message through Short Message Service (SMS) is sent to the EWS module. From the message, the EWS module triggers the solid state relay to activate the light and siren to provide warning alarms. Tilting angle accuracy of the AWS rain gauge was analyzed with results showing that rainfall measurements are reliable up to a tilt angle of 1o degrees for both east and west tilting and 1f degrees for north and south tilting. The system was also proven to be secure with 100% rate of recognizing valid commands at valid senders rate of recognizing valid commands at valid senders. The time lag of the EWS in sounding an alarm from the time the warning message is sent was found to be best at 7 AM with 9 s response time. Results show that the system provides accurate, secure, and immediate warnings for remote areas which might be affected by floods due to heavy rains which could save lives specially at night where people are asleep and no one is on guard to warn them.

Language

English

Location

UPLB Main Library Special Collections Section

Call Number

LG 993.5 2013 P51 /N38

Document Type

Thesis

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