Piezoelectric tubes are thin-walled cylinders lined with electrodes that can achieve axial displacement (changes in length) or radial displacement (changes in diameters). Most piezoelectric tubes are radially polarized, containing one or several separate electrodes on the internal wall and several separate electrodes lining the external wall, depending on the intended application. There are three main configurations of piezoelectric tubes with either plain electrodes, split electrodes, or striped electrodes, which all achieve displacement in vertical, radial, and circumferential directions. The piezo tube(piezoelectric tube) will contract or expand radially and axially as soon as a voltage is applied. In piezo tube scanners, lateral deflection of the tube tip is also possible by using striped or segmented outer electrodes to generate axial and XY displacement. The direction of displacement depends on the placement of electrodes along the piezo tube actuator, in conjunction with the direction of polarization and the application of the voltage. One end of the piezoelectric tube is fixed, while the piezo tube body is responsible for deflection. Axial elongation and radial expansions are achievable with piezoelectric tube actuators, sensors, and transducers.

What is Piezoelectric Ceramic Tubes?

Since the piezoelectric element contracts according to the applied voltage, applying a load to the piezoelectric in the compression direction will increase the stroke, but has a negative impact on its recovery. Therefore, we do not specify the load that can obtain the maximum displacement like other piezoelectric bodies.

Piezo tubes can be configured with vertically segmented, horizontally segmented, or wrap around electrodes, depending on the desired result of the piezoelectric tube. In general, there are two different manufacturing processes to make the piezo tubes. Piezoelectric tubes with relatively large inner and outer diameters can be casted and achieve necessary tolerances through machining. Piezo tubes with a small inner diameter and/or a large length to diameter ratio has to be extruded.

Application in ultrasonic sensors

Ultrasonic sensor is a type of sensor that utilizes the reflection, absorption, and propagation characteristics of ultrasonic waves to measure distance and detect target substances. Piezoelectric ceramic tubes are used as oscillators in ultrasonic sensors and generate ultrasonic signals through rapid vibration. This type of application is very extensive, including fields such as automobiles, healthcare, and manufacturing.

FBelec is a national high-tech enterprise that specializes in the research and development, production, and sales of products based on piezoelectric and ultrasonic technology. It provides solutions for piezoelectric and ultrasonic applications to hundreds of domestic and foreign enterprises and research institutions. We have dozens of national patents and have successively passed multiple management systems and product certifications such as ISO9001 quality management system, ISO14001 environmental management system, ISO45001 occupational health and safety management system, CE, etc. Our products include: piezoelectric ceramic components, ultrasonic transducers, ultrasonic sample processors, ultrasonic bubble detectors, megasonic cleaning systems, ultrasonic nozzles, ultrasonic precision spraying systems, ultrasonic spray pyrolysis systems, etc. Compared with other companies in the same industry,We have both research and production capabilities in piezoelectric ceramic materials, ultrasonic transducers, and ultrasonic equipment systems. It is one of the few ultrasonic technology enterprises in the world that covers the entire industry chain from materials to devices to systems.