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Ultrasonic characteristics description Ultrasonic selection Quote Foreign import

In recent years, with the development of microcomputer and electronic technology, ultrasonic technology has been applied to industrial measurement, and the means for transmitting, capturing and processing ultrasonic signals has been improved. Until now, ultrasonic level meters and ultrasonic meters have been used in various types. Widely used in enterprises, ultrasonic has the following acoustic characteristics, please pay attention to:
Ultrasonic refers to sound waves with a frequency exceeding 20 kHz. In order to fully understand the technology of ultrasonic flowmeters, it is very important to understand the characteristics of ultrasonic flowmeters.
First, the introduction of reflection characteristics
Ultrasonic flowmeters move from one medium to another because the density of the two different media is different. Since there are two media interfaces, the direction propagation will change qualitatively: under normal circumstances It will also appear that some of it is refracted into another medium and the other part is reflected back.
When ultrasonic waves are transmitted as a gas to a solid or a liquid, the sound waves are almost completely reflected due to the difference in density between the two media, and the ultrasonic level gauge makes full use of this characteristic.
When ultrasonic waves propagate to a liquid as a solid, or when a liquid propagates to a solid, the sound waves are almost completely refracted by the density of the propagating medium, and the ultrasonic flowmeter utilizes this characteristic to finally achieve accurate measurement results.
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Second, the introduction of sound velocity characteristics
Ultrasonic waves can travel very fast at different speeds in solids, liquids and gases. The speed is affected by many factors such as temperature and pressure of the medium, but in the same external environment, the ultrasonic wave will travel in the same medium. It is a normal value and the basis for the measurement by the ultrasonic meter.

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