Frequency Domain Rangefinder

A rangefinder for detecting vehicles getting too close

Ranarchy

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Description

This uses a near-infrared LED (so cheap Si detectors can be used) and a photodiode for sensing.  A PIC processor to do a Fourier Transform and determine the range.

Files

Digital generation of sine waves.docx

An easy way to synthesize a sine wave using a micro-controller. We need sine waves to enable us to filter out all the noise generated by a moving target and moving source.

document - 661.02 kB - 04/27/2016 at 13:53

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1

Step 1

Step One: Generating a Sine Wave using a MicroController:
2

Step 2

Step Two: Driving the Illuminator with the Sine Wave
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Step 3

Step Three: Collecting the reflections of the Sine Wave

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Frequency Domain Rangefinder

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Digital generation of sine waves.docx

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