Ultrasonic Transducers Are Devices Used for Energy Conversion
1. Influencing factors of different structural designs of ultrasonic transducers
Ultrasonic transducer is a device that converts electrical energy into mechanical energy, and realizes the mutual conversion of electrical energy and mechanical energy by piezoelectric effect. It is called piezoelectric transducer. It consists of a central piezoelectric ceramic element, front and rear metal covers, and prestressed screws, electrodes and insulating tubes. According to different structural designs, it also has a great influence on their form and performance.
The influencing factors of ultrasonic transducers, according to the introduction of ultrasonic transducer equipment, specifically, are the structure, piezoelectric ceramic material matching and manufacturing process. Moreover, if the thickness is different, then the electrical parameters of the transducer are obviously different. If it is used as a heat meter, the influencing factors are mainly piezoelectric ceramic material and manufacturing process. Ultrasonic transducer suppliers and manufacturers believe that the ultrasonic frequency and its power are mainly different, because in this respect, there are obvious differences. In addition, the internal circuit of the transducer, that is, the main control board and the matching inductance, are also different. Therefore, they cannot be mixed, otherwise, there will be problems.
2. Ultrasonic transducer is a device used for energy conversion
Ultrasonic transducers for different purposes have different requirements for performance parameters. For example, for transmitting ultrasonic transducers, ultrasonic transducers are required to have large output power and high energy conversion efficiency; for receiving ultrasonic transducers, Then a wide frequency band and high sensitivity are required. Therefore, in the specific design process of the ultrasonic transducer, the relevant parameters of the ultrasonic transducer must be reasonably designed according to the specific application.
Ultrasonic transducer is an energy conversion device whose function is to convert the input electrical power into mechanical power (ie, ultrasonic waves) and then transmit it out, while it consumes a small part of the power itself. Therefore, the most important issue to consider when using ultrasonic transducers is the matching with the input and output terminals.
The matching between the power ultrasonic generator and the ultrasonic transducer includes two aspects. One is to make the generator output the rated electric power to the ultrasonic transducer through matching. Because the generator needs an optimal load to output the rated power. The impedance of the transducer is transformed into the best load, that is, the effect of impedance transformation; the second is to make the output efficiency of the generator the highest through matching, which is the reason for the electrostatic reactance of the ultrasonic transducer, resulting in the output voltage and current at the operating frequency to have a certain phase difference, so that the output power can not get the desired maximum output, which reduces the output efficiency of the generator. Therefore, an opposite reactance is connected in parallel or in series at the output of the generator, so that the generator load is pure resistance, that is, the tuning effect. It can be seen that the quality of matching directly affects the generation and efficiency of the power ultrasonic source.