A four-channel microcomputer- based data-storing sine wave oscilloscope for multiple data acquisition

Date

5-1997

Degree

Bachelor of Science in Applied Physics

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Edvino G. Eusebio

Abstract

A system for the measurement and observation of sinusoidal waveforms was designed and implemented on a 80286 microcomputer system. The system was designed in such a manner that in can be employed to measure quantities such as peak voltage and frequency similar to that of the general functions of an oscilloscope. The imitation of the oscilloscope was implemented using three independent processes. First, a printed circuit board (PCB) was designed and constructed for making independent measurements of the frequency and amplitude of an input AC voltage signal possible. This was done by designing and implementing the frequency-to-voltage converter and the full-wave rectifier circuits. The former was designed to measure the corresponding frequency while the latter was for the measurement of the peak voltage of the AC signal in DC mode which can be accepted by the ADC card. The second part consists of an analog-to-digital converter (ADC) card with eight different channels in an address range of 300H to 30711 in the I/O port of an 80286 microcomputer. This was calibrated at a resolution of 0.8 millivolt per bit. The last part was the coding of computer software program written for controlling the hardware, selection of the active channels of the ADC card, gathering data, and displaying the AC signal in the computer monitor in its decimal and sinusoidal wave form using the parameters specified by the user. The system was also used to serve as a controller, i.e. capable of sending signal to the printer port whenever the maximum frequency or voltage has been reached. This versatile software program was developed using object-oriented programming style.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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