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Learning Robotics using Python. - Second Edition

You're reading from  Learning Robotics using Python. - Second Edition

Product type Book
Published in Jun 2018
Publisher Packt
ISBN-13 9781788623315
Pages 280 pages
Edition 2nd Edition
Languages
Concepts
Author (1):
Lentin Joseph Lentin Joseph
Profile icon Lentin Joseph
Toc

Table of Contents (12) Chapters close

Preface 1. Getting Started with Robot Operating System 2. Understanding the Basics of Differential Robots 3. Modeling the Differential Drive Robot 4. Simulating a Differential Drive Robot Using ROS 5. Designing ChefBot Hardware and Circuits 6. Interfacing Actuators and Sensors to the Robot Controller 7. Interfacing Vision Sensors with ROS 8. Building ChefBot Hardware and the Integration of Software 9. Designing a GUI for a Robot Using Qt and Python 10. Assessments 11. Other Books You May Enjoy

Working with the IR proximity sensor

Infrared sensors are another method to find obstacles and the distance from the robot. The principle of infrared distance sensors is based on the infrared light that is reflected from a surface when hitting an obstacle. An IR receiver will capture the reflected light and the voltage is measured based on the amount of light received.

One of the popular IR range sensors is Sharp GP2D12. The product link can be found here: http://www.robotshop.com/en/sharp-gp2y0a21yk0f-ir-range-sensor.html

The following image shows the Sharp GP2D12 sensor:

The sensor sends out a beam of IR light and uses triangulation to measure the distance. The detection range of the GP2D12 is between 10 cm and 80 cm. The beam is 6 cm wide at a distance of 80 cm. The transmission and reflection of the IR light sensor is illustrated in the following diagram:

Obstacle sensing...
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