Quake-sense: Pendulum and Ultrasonic Sensor-equipped Earthquake Alarm with Liquid Crystal Display and Global System for Mobile Communication Module version 2.0

Abstract

INTRODUCTION

An earthquake is an unpredictable natural disaster. People who lived in countries that experience earthquakes regularly should be prepared or at least be given a warning before significant ground shaking starts, because they may be unaware of the threat that follows them. Even though earthquakes have happened in the past, they will inevitably repeat themselves at some point in the future (NERC, 2018). This study was an improved version of a previous research. This device detects both primary and secondary waves. After detecting the seismic waves, it could warn people by emitting very loud sounds and notify larger number of people by transmitting information via text messages and LCD display.

METHODS

The device was designed, constructed and programmed. It was programmed using an Arduino programming software. Using PHIVOLCS' earthquake simulator, the researchers were able to calibrate the magnitude readings. The device's accuracy in measuring the magnitude of an earthquake, transmitting information through LCD, SMS, and its capability in alarming were tested at Diliman, Quezon City. The percentage of accuracy was determined by getting the number of success divided by the total of trials, and then the result will be multiplied by one hundred.

RESULTS

The results showed no significant difference between the magnitude readings of PHIVOLCS and Quake-sense. The results showed that the device is capable of detecting the horizontal and vertical movements of an earthquake. It is also capable in alarming people with the use of voice alarm whenever the magnitude detected by the device was greater than or equal to three. The device showed 100% accuracy in terms of sending information through SMS using the GSM, and displaying information through LCD. The results were gathered and proven using the t-test. This implies that the device is efficient in determining the magnitude of an earthquake and notifying larger number of people using the GSM, LCD, and its alarm system.

DISCUSSIONS

Based on the results, Quake-sense was capable of giving an alarm whenever an earthquake is detected and giving accurate information based on the readings. However, this requires a strong mobile signal in order to send the message with no delay. The device is also efficient in notifying people when the magnitude readings are violent and evacuation is a must. Thus, it could help people to respond accordingly to the situation and avoid mindless panic.