Ultrasonic transducers are devices used for energy conversion
Different application of ultrasonic transducers require different performance parameters, such as ultrasonic transducer for transmitting requires large output power and high energy conversion efficiency; and for receiving ultrasonic ultrasonic transducer requires a wide frequency band and high sensitivity. Therefore, the ultrasonic transducer in the specific design process, must be based on the specific application, the ultrasonic transducer parameters related to rational design.
Ultrasonic ultrasonic transducer is an energy conversion device, its function is to convert the input electrical power into mechanical power (ie, ultrasonic) and then pass out, and itself consumes a small part of the power (less than 10%). Therefore, the use of ultrasonic ultrasonic transducer should be considered the most question is with the input and output matching.
Ultrasonic generator and ultrasonic transducer matching include two aspects, one is matched by the generator to the ultrasonic transducer output rated electrical power, which is due to the generator needs an optimal load to output the rated power due to the The impedance of the ultrasonic transducer into the best load, that is, the role of impedance transformation; the second is by matching the generator output efficiency of the highest, which is due to the static impedance of ultrasonic transducers, resulting in the operating frequency of the output voltage and The current has a certain phase difference, so that the output power can not be expected maximum output, the generator output efficiency is reduced, so the output of the generator and the string or on an opposite anti-generator load so that the pure resistance That is, tuning. This shows that the quality of the match directly affects the power generation and efficiency of ultrasound sources.
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