Ultrasound is cyclic sound pressure with a frequency greater than the upper limit of human hearing. Although this limit varies from person to person, it is approximately 20 kilohertz (20,000 hertz) in healthy, young adults and thus, 20 KHz serves as a useful lower limit in describing ultrasound. The production of ultrasound is used in many different fields, typically to penetrate a medium and measure the reflection signature or supply focused energy. The reflection signature can reveal details about the inner structure of the medium, a property also used by animals such as bats for hunting. The most well known application of ultrasound is its use in sonography to produce pictures of fetuses in the human womb. There are a vast number of other applications as well.
Although ultrasound behaves in a similar manner to audible sound, it has a much shorter wavelength. This means it can be reflected off very small surfaces.
Ultrasonic vibrations travel in the form of a wave which is similar to the way light travel. However, unlike light waves, which can travel in a vacuum, ultrasound requires an elastic medium.
Proximity Detector
These are devices that are used to detect the presence of another object using some property such as Doppler Effect, Mutual Capacitance, reflection of signals etc. These devices and its principles are used in parking sensors, burglar alarms, motion sensors, RADAR, SONAR etc.
Download Mini Project Ultrasonic Proximity Detector (PDF 700KB)
Although ultrasound behaves in a similar manner to audible sound, it has a much shorter wavelength. This means it can be reflected off very small surfaces.
Ultrasonic vibrations travel in the form of a wave which is similar to the way light travel. However, unlike light waves, which can travel in a vacuum, ultrasound requires an elastic medium.
Proximity Detector
These are devices that are used to detect the presence of another object using some property such as Doppler Effect, Mutual Capacitance, reflection of signals etc. These devices and its principles are used in parking sensors, burglar alarms, motion sensors, RADAR, SONAR etc.
Download Mini Project Ultrasonic Proximity Detector (PDF 700KB)
Will this circuit detect liquid drop ??
ReplyDelete