Reflectance Sensors

SensorBot

Confidential and proprietary property of TinkRworks, Inc.

Confidential and proprietary property of TinkRworks, Inc.

Line Following is not New

• Line following tech has been around since the 1960s.

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• The tech has advanced greatly, but the basic concept is the same.

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• The bot uses the difference in brightness of the line versus the rest of the floor to follow the line.

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Confidential and proprietary property of TinkRworks, Inc.

Reflectance Sensor

The sensor shines an infrared light (your eye can’t see it) and looks for a reflection — light bouncing back.

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For this reason, it’s known as a reflectance sensor.

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The light emitter and the light sensor are in this black box

This blue box is a dial that you can use to change how sensitive the sensor is to light.

Confidential and proprietary property of TinkRworks, Inc.

How does it work?

• Reflectance sensors transmit IR light and measures how much bounces/reflects back.

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• Bright surfaces absorb a little and reflect a lot.

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• Dark surfaces absorb a lot and reflect little.

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• Based on how much light is reflected, the Arduino can determine what surface the bot is over.

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Confidential and proprietary property of TinkRworks, Inc.

Why we have 2 sensors

• We use SensorBot’s reflectance sensors not only to follow lines, but also to prevent it from falling off surfaces.

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• There are 2 sensors so we can monitor both sides of the bot.

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Confidential and proprietary property of TinkRworks, Inc.