PC-based instrument for ultrasonic detection of mango pulp weevil (Sternochetus frigidus Fabr.) infestation
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 PC-based detection system was developed and used for investigating the presence of mango pulp weevil infestation. An Ultrasonic Delta testing technique was applied for nondestructive quality evaluation of the mango fruit and quantitative relations were established between ultrasonic parameters and infestation related factors. Ultrasonic waves at 24.6 kHz were transmitted through whole mango fruits using an ultrasonic transducer to investigate the existence of infestation. The waveform of reflected ultrasonic signals from infested mangoes differed from that of a mango free of infestation. Hence, defective mangoes could be separated based on waveform analysis of the reflected ultrasonic signals. A total of 312 mango fruits were tested to determine the accuracy of the instrument. Results revealed that ultrasonic delta testing technique could be used for nondestructive detection of mango pulp weevil with an accuracy of 80.13%. The delta testing method allows not only detection of the weevil but also of all forms of discontinuities created by other factors. This technique is also capable of establishing the location of the cavity at 75% accuracy. Thus, it could also be used for nondestructive quality evaluation of fruits.
Language
English
Location
UPLB Main Library Special Collections Section (USCS)
Call Number
Thesis
Recommended Citation
Sotto, Meredith Anne C., "PC-based instrument for ultrasonic detection of mango pulp weevil (Sternochetus frigidus Fabr.) infestation" (2001). Undergraduate Theses. 10485.
https://www.ukdr.uplb.edu.ph/etd-undergrad/10485
Document Type
Thesis