Microcomputer-based speed measurement using doppler effect of ultrasonic waves

Date

3-2003

Degree

Bachelor of Science in Applied Physics

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Nelio C. Altoveros

Abstract

A speed measurement instrument using Doppler effect of continuous ultrasonic wave was designed, implemented, tested, and evaluated. An ultrasonic transmitter and receiver sensor was used for the instrument. An Input/Output Digital Card was used to be able to interface the instrument to an 80486SX microcomputer system via the Industry Standard Architecture (ISA) Program routines were developed to control the instrument for angle of reflection setting, determining the speed, collection, presentation, and storage of data A 24 870 KHz frequency generated by the function generator was used for the ultrasonic transmitter. The test object's speed was determined by the Doppler frequency received by the ultrasonic receiver sensor at a I second trigger. The reading from the instrument was compared to that of the photogate method, which has a 0.994156 correlation. Based from the corrected reading of the instrument, it showed an accuracy of 98.96%. Two schemes for analyzing data were used. The first scheme compares the instrument's actual measurement with the measurement of the photogate method. This showed a mean difference of 71.34 cm/s with respect to the reading of the instrument. The second was the comparison of the corrected measurement of the instrument with the other method

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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