As we all know, the ultrasonic transducer is to convert the input electrical power into mechanical power and then pass it out, and it consumes a small part of the power, the following to tell you about the directivity of the ultrasonic transducer.
Ultrasonic transducers have sharp directivity, which is conducive to concentrating the transmitted energy, obtaining a high signal-to-noise ratio when receiving, and also conducive to the positioning evaluation of the detection target. Ultrasonic welding machine manufacturers show that the ultrasonic transducer and its radiation surface size, structure, operating frequency and sound media characteristics are related, most of them can use directivity factors to reflect the directivity of the ultrasonic transducer.
The so-called directivity factor refers to the ratio of the mean square sound pressure of a certain frequency at a fixed point far from the transmitting ultrasonic transducer on the main axis sound pressure of the emitting beam and the mean square sound pressure of a certain frequency at a point on the sphere concentric to the transducer through the point. For receiving ultrasonic transducers, the luffing rod manufacturer indicates the ratio of the electromotive force square value generated by a certain frequency sound wave transmitted along the main axis of the transducer to the square value of the diffuse sound field with the same frequency and square root sound pressure.
The directivity factor that illustrates the ultrasonic transducer can be expressed in decibels (dB), which is equivalent to the common logarithm multiplier of 10 for the directivity factor.
