Microcomputer-based instrument for detecting mango pulp weevil (Sternochetus frigidus Fabr.) infestation using a piezoelectric vibration sensor

Date

3-2001

Degree

Bachelor of Science in Applied Physics

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Nelio C. Altoveros

Abstract

A microprocessor-based instrument for detecting mango pulp weevil (Sternocheius frigidus) was designed, implemented, and evaluated. The instrument uses a piezoelectric vibration sensor to sense the vibrations produced by the mango pulp weevil (MPW). An amplifier circuit was used to amplify the analog signals detected by the sensor The instrument was interfaced to a Pentium 166 microcomputer through a custom-made analog-to-digital converter (ADC) card. A program was developed using C programming language that automatically gathers, analyzes, and stores the data Three hundred mangoes were tested to evaluate the accuracy of the instrument. Of the 120 infested mangoes, only 44 of them were detected (36.66%). A higher accuracy was obtained in detecting the clean mangoes. One hundred twenty seven out of 180 clean mangoes were correctly identified (70.55%). Total instrument accuracy was computed to be 57.0%. The instrument can be applied to detection protocol and bioacoustics research once it is improved.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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