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The ultrasonic transducer can vibrate regularly under the excitation of a suitable electric field, and its amplitude is generally about 10μm. Such an amplitude is not enough to directly complete the welding and processing procedures. After connecting to a reasonably designed horn, the amplitude of the ultrasonic wave can be changed in a large range, as long as the material strength is sufficient, the amplitude can exceed 100μm.
Due to different processing methods and requirements, the working mode of the transducer can be roughly divided into continuous work (such as lace machine, CD machine, cleaning machine, zipper machine) and pulse work (such as plastic welding machine). The requirements of the device are different. Generally speaking, continuous work has almost no pause time, but the working current is not very large, and the pulse work is intermittent with pauses, but the instantaneous current is very large. On average, the power of the two states is large.
The main consideration when using an ultrasonic transducer is the matching with the input and output ends, followed by mechanical installation and matching dimensions. The frequency of the transducer is relatively intuitive. The frequency refers to the frequency measured by the transmission line method with a frequency (function) generator, millivoltmeter, oscilloscope, etc., or the frequency measured with a similar instrument such as a network impedance analyzer. Generally known as small signal frequency. Corresponding to it is the computer frequency, that is, the actual operating frequency measured when the customer connects the transducer to the chassis through a cable and is powered on without load or with a load. Because the matching circuits of customers are different, the frequency of the same transducer in different driving power sources (electric boxes) is different, and this frequency cannot be used as a basis for exchange discussions.

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