What is ultrasound and what is the purpose of ultrasound?

by 人生
August 20, 2021

Ultrasound is a sound wave with Portable ultrasound a frequency greater than 20000 Hz. Good directivity, strong penetrating ability, easy to obtain concentrated sound energy. Ultrasonic frequency: f ≥20khz (in fact, due to similar effects, usually f ≥15khz is also called ultrasonic wave); ultrasonic power density: p = emission power (w) / emission area (cm2), usually p ≥ 0.3 w /cm2.

"Ultrasound" is a "sound wave" that exceeds the upper limit of human hearing. The frequency of "ultrasound" exceeds 20,000 Hz, and the frequency ranges from 20 kHz to 500 kHz. "Sound waves" (including "ultrasonic waves") are generated by mechanical vibrations, which travel at the same speed as sound in the air, about 340 meters per second, and have good directivity.

1. The application of ultrasonic in distance sensor technology

The application of ultrasound in medicine

The application of ultrasound in medicine is mainly to diagnose diseases, and it has become an indispensable diagnostic method in clinical medicine. The advantages of ultrasound diagnosis are: no pain, no injury, simple method, clear image, high diagnostic accuracy.

Third, the application of ultrasonic in liquid level measurement

1. No mechanical transmission parts, no contact with the measured liquid, non-contact measurement, no fear of electromagnetic interference, strong corrosive liquids such as acid and alkali. Stable performance, high reliability and long service life.

2. Its response time is short, which can easily realize real-time measurement without delay.

Ultrasound is a great discovery, it has great use in our lives, making our lives more convenient and scientific.