Velocity Measurement Of Moving Particle Using Combination Of Laser And Phototransistor

Amirah , Jaafar Mad Ariff (2009) Velocity Measurement Of Moving Particle Using Combination Of Laser And Phototransistor. Project Report. UTeM, Melaka,Malaysia. (Submitted)

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Abstract

This project describes an investigation the use of optical sensor in order to measure the velocity of moving particle. The aim of the project is to obtain the velocity when objects are dropped through the sensing area of the pipe. To measure the velocity, two pairs of sensors are placed upstream and downstream on the pipe and crosscorrelation method is used to obtain the velocity. The output is formed when both up stream and downstream sensors is cross-correlated. The peak of the cross-correlation graph represented the time for the object to move from upstream to downstream. The velocity is obtained by dividing the time and the distance between upstream and downstream. In this project, eight pairs of sensors were used. Each pair of transmitter and receiver are placed opposite and facing each other in a parallel manner. In this experiment, it is assume that the signal wave is in the straight ray propagation. Prototype circuits will be implement which is involved design of signal control circuit and also jig and fixture design or fabrication. For data processing method, Visual Basic 6.0 is used to implement the algorithm for cross-correlation method. The data is collected using data acquisition system and it is set an offline process.

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