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...
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Rushi Gajjar is an entrepreneur, embedded systems hardware developer and a lifetime electronics enthusiast. He works in the field of research and development of high-speed single-board embedded computers and wireless sensor nodes for the Internet of Things. Prior to that, his extensive work as a freelancer in the domain of electronics hardware design introduced him to rapid prototyping development boards and single board embedded computers such as the Raspberry Pi. In the spare time, he loves to develop the projects on Raspberry Pi including sensors, imaging, data logging, web-servers, and machine learning automation systems. He authored a DIY and hardware based book titled Raspberry Pi Sensors which takes deep dive in developing sensor interfacing based projects with Raspberry Pi. His vision encompasses connecting every entity in world to the Internet for enhancing the human living experience. https://www.linkedin.com/in/rushigajjarhttp://www.amazon.com/Raspberry-Pi-Sensors-Rushi-Gajjar/dp/1784393614/ref=sr_1_9?ie=UTF8&qid=1453884207&sr=8-9&keywords=raspberry+Pi+Sensorshttp://rushigajjar.blogspot.in/
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Rushi Gajjar is an entrepreneur, embedded systems hardware developer and a lifetime electronics enthusiast. He works in the field of research and development of high-speed single-board embedded computers and wireless sensor nodes for the Internet of Things. Prior to that, his extensive work as a freelancer in the domain of electronics hardware design introduced him to rapid prototyping development boards and single board embedded computers such as the Raspberry Pi. In the spare time, he loves to develop the projects on Raspberry Pi including sensors, imaging, data logging, web-servers, and machine learning automation systems. He authored a DIY and hardware based book titled Raspberry Pi Sensors which takes deep dive in developing sensor interfacing based projects with Raspberry Pi. His vision encompasses connecting every entity in world to the Internet for enhancing the human living experience. https://www.linkedin.com/in/rushigajjarhttp://www.amazon.com/Raspberry-Pi-Sensors-Rushi-Gajjar/dp/1784393614/ref=sr_1_9?ie=UTF8&qid=1453884207&sr=8-9&keywords=raspberry+Pi+Sensorshttp://rushigajjar.blogspot.in/
Read more about Rushi Gajjar