![]() ![]() In contrast to low-power ultrasound, high-power ultrasound causes material changes or even destruction and is therefore suitable for use in material processing, ultrasonic cleaning or in the medical field in > Lithotripsy. If this exceeds 10 W/cm 2, it is referred to as high-power sound. We chose to use sensors from the DT Series by Measurement Specialties. You can use these for tap or knock sensors pretty easily by reading the voltage on the output. Use a Piezoelectric sensing element which can be either board mounted or remote. This sensor measures 20mm in diameter and just 0.42mm thick. The intensity of the sound describes the power that hits a certain surface. A Piezo element comes in handy when you need to detect vibration or a knock. In addition to medical imaging, low sound intensities are also required for applications in measurement technology. ![]() The great advantage of sonography over other imaging methods in medical technology is that sound waves are harmless and can even be used for unborn babies. Here, ultrasound is used to generate images of tissue and organs. This project introduces students to the piezoelectric effect, and using a piezoelectric sensor to detect shock and vibration. The best known field of application is sonography, also known as echography. Industry, medical technology and research use ultrasound for many purposes. The frequency range for ultrasound is up to 16 GHz, i.e., 16 billion cycles per second. Ultrasound is the term used when the frequency of the propagating wave exceeds 16,000 Hz, making it undetectable for the human ear. If an external force acts on an elastic medium such as a gas, a liquid or a solid, an undulating propagation of pressure and density fluctuation occurs in space and time, starting from the point where the force is applied. The piezoelectric sensor is used for flex, touch, vibration and shock measurement. ![]()
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