1. Ultrasonic transducer is an energy conversion device that converts high frequency electric energy into mechanical energy. .It is often apply in ultrasonic cleaning machines, ultrasonic welding machines, triclosan machines, gas cameras and other equipment, and has been widely used in agriculture, industry, life, transportation, military, medical and other fields.
2. Principle of ultrasonic transducer -- structure: ultrasonic transducer mainly consists of shell, sound window (matching layer), piezoelectric ceramic disc transducer, backing liner, leading-out cable, Cymbal array receiver, etc. Among them, the piezoelectric ceramic disc transducer plays the same role as the general transducer, and is mainly used for transmitting and receiving ultrasonic waves. Above the piezoelectric ceramic disc transducer is the Cymbal array receiver, which is mainly composed of the leading cable, the Cymbal transducer, the metal ring and the rubber washer. It is used as an ultrasonic receiver to receive the doppler redial signal generated outside the frequency band of the electric ceramic disk transducer.
3. Principle and application of ultrasonic transducer
(1) ultrasonic cleaning machine uses ultrasonic waves to continuously spread in the cleaning solution to clean dirt on objects. Its ultrasonic wave vibration frequency is determined by ultrasonic transducers. Different frequencies can be set according to the cleaning materials to achieve the purpose of cleaning.
(2) ultrasonic welding machine uses ultrasonic transducer to generate ultrasonic vibration, and the vibration generates friction, which makes the welding zone partially melt and then join together.
(3) the ultrasonic motor does not contain an ultrasonic transducer, but its stator is approximately a transducer. By using the inverse piezoelectric effect, ultrasonic vibration should be generated, and the rotor rotation is driven by the friction between the stator and the rotor.
(4) ultrasonic weight-loss and medical cosmetology instruments use ultrasonic transducers to generate mechanical vibration, smashing fat cells out of the body and achieving the effect of weight loss.
(5) The electronic blood pressure meter uses the ultrasonic transducer to receive the pressure of the blood vessel. When the airbag pressurizes and presses the blood vessel tightly, because the external pressure is higher than the diastolic pressure of the blood vessel, the ultrasonic transducer cannot feel the pressure of the blood vessel.When the air bag is gradually deflated, the pressure of the ultrasonic transducer on the blood vessel is reduced to a certain value, and the pressure of the two is balanced. At this point, the ultrasonic transducer can feel the pressure of the blood vessel, which is the systolic pressure of the heart.The electric sonometer can reduce the labor intensity of the medical staff by eliminating the stethoscope.
Medical ultrasonic imaging technology, X-ray CT, MRI and ECT are the four major medical imaging technologies of modern medical imaging technology, and have been widely used in cardiology, obstetrics, ophthalmology, liver and ECT.Kidney, gallbladder and vascular system.Compared with other imaging technologies, ultrasonic imaging technology has the unique advantages of good real-time performance, no damage and low cost, and has been widely used in practice.Ultrasonic imaging technology is a technology that uses ultrasonic transducers to send ultrasonic waves into human tissue, and the reflection echo formed at different tissue boundaries of human body is processed by imaging. As a transducer for medical ultrasonic emission and echo receiver, it is always the most important acoustic component in medical ultrasonic imaging system.The continuous development of medical ultrasonic imaging transducer makes the ultrasonic image clearer and display more intuitive.
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