Infrared Distance/Height Measurement

Mohd Hairudin , Jaffri (2007) Infrared Distance/Height Measurement. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The objective of this project is designing and building an infrared system that can measure distance or height and display the reading on LCD display. Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of radio waves. Infrared radiation spans has wavelengths between approximately 750 nm and 1 mm. Infrared is the most common way for remote controls to command appliances. However, commonly ultrasonic and laser are used in application for measuring distance while infrared is suitable for measuring temperature. The purpose of this project is to perform an analysis comparing the real distance and to get a reading that has minimum error. The Electronic Measuring tape is perfect for anyone who needs to quickly measure square footage of a home, determine the distance or estimate the deep when digging hole. The Electronic Tape Measure sends out narrow beams of signal pulses that bounce off solid objects back to the hand-held receiver. A triangle between the point of reflection, the emitter, and the detector vary based on the distance to the object, and from those angles, the distance to the object can be calculated. Custom electronics and a microprocessor then convert elapsed time into a distance measurement and display it on the LCD.

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