Develop A Rotating Speed Sensor System With Link To Visual Basic.Net

Chee, Jiann Tong (2010) Develop A Rotating Speed Sensor System With Link To Visual Basic.Net. Project Report. UTeM, Melaka,Malaysia. (Submitted)

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Abstract

The purpose of this project is to develop an angular speed detection system using a special Infra-Red sensor (IR) where it can detect black and white color and give a small differences voltage signal when the shaft motor was rotating. The black and white color will put at the shaft motor. When the shaft motor is rotated, the emitter IR sensor will emit infrared continuously and detect the color changes depends on setting or fixed time that will be programmed at microcontroller using PIC (Programmable Interface Controllers) complier software. This colors changing will generate a differences voltage. Usually, the microcontroller only recognizes digital input which is 0V and 5V. If the infrared reflected is less, the receiver would probably produce 2V or 3V and microcontroller is unable to deal with these analog values. So, the comparator (LM324) is used to solve this problem. By using the comparator LM324, the output voltage from IR receiver will compare to an input voltage through a variable resistor. This comparator able to compare for both input voltage and generate either 0V or 5V where it can connect to microcontroller. Lastly, the output voltage from microcontroller will display using LCD (Liquid Crystal Display). The important of my project is to display the measured value on the GUI Display on computer via Visual Basic.NET.

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