When you go on an expedition to mountains, you must have experienced the echo phenomenon while shouting loudly towards high mountains. You can even experience this phenomenon in a hall that doesn't have interiors such as curtains and furniture (in a new house). The ultrasonic sensor works on a similar principal. Ultrasonic sensors generate ultrasound waves that are targeted towards an obstacle after which they wait for the echo to be heard. However, why don't you hear any sound when you use an ultrasonic sensor? The answer is pretty simple: this sensor works at an ultrasonic frequency, which is higher than the audible frequency range of humans. The human's average theoretical audible frequency range is 20 Hz to 20 KHz. The ultrasonic sensor transmits the sound waves (also called as a sonic burst) higher than 20 KHz frequency. Ultrasonic waves are mainly used because they are not audible to the human ear and also because they provide precise distance measurement...
Raspberry Pi Sensors
By :
Raspberry Pi Sensors
By:
Overview of this book
Table of Contents (16 chapters)
Raspberry Pi Sensors
Credits
About the Author
Acknowledgements
About the Reviewers
www.PacktPub.com
Preface
Free Chapter
Meeting Your Buddy – the Raspberry Pi
Meeting the World of Electronics
Measuring Distance Using Ultrasonic Sensors
Monitoring the Atmosphere Using Sensors
Using an ADC to Interface any Analog Sensor with the Raspberry Pi
Uploading Data Online – Spreadsheets, Mobile, and E-mails
Creating an Image Sensor Using a Camera and OpenCV
Shopping List
Index
Customer Reviews