Ultrasonic wave is a frequency higher than 20,000 hertz sound waves, it is a good direction, penetrating ability, easy to obtain a more concentrated sound energy.
Frequency of ultrasonic wave: F≥20KHz (in practical application because of the similarity of the effect, usually F≥15KHz sound wave is also known as ultrasonic wave);
Ultrasonic power density: p=emission power (W)/emission area (cm2), usually p ≥ 0.3w/cm2.
Ultrasonic power density: p = emission power (W)/emission area (cm2), usually p ≥ 0.3w/cm2. p> Expanded Information:
I. Application of ultrasound in distance sensor technology
The ultrasonic sensor consists of three parts: the ultrasonic transducer, the processing unit and the output stage. First of all, the processing unit of the ultrasonic transducer to voltage excitation, the excitation of the ultrasonic pulse form of ultrasonic waves, and then the ultrasonic transducer into the acceptance of the state, the processing unit of the ultrasonic pulse received to analyze, to determine the received signal is not the echo of the ultrasonic waves sent out.
Two, ultrasound in medicine
Ultrasonic applications in medicine is mainly to diagnose diseases, it has become an indispensable diagnostic method in clinical medicine. The advantages of ultrasound diagnosis are: no pain, no damage to the examinee, simple method, clear image, diagnostic accuracy and so on.
Three, ultrasonic applications in the measurement of liquid level
1, without any mechanical transmission components, and does not touch the measured liquid, belonging to the non-contact measurement, is not afraid of electromagnetic interference, not afraid of acid and alkali and other highly corrosive liquids, so stable performance, high reliability, long life.
2, its short response time can easily realize the real-time measurement without lag.
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