Abstract
Three-dimensional (3D) positioning enables the precise localization and processing of objects and has been regarded as a vital technology with diverse applications in numerous fields. This paper presents a novel ultrasonic transducer with high sensitivity and flexibility for detecting 3D positions of target objects. The proposed flexible transducer features a 1 × 3 array of 1–3 piezoelectric composites that exploits copper (Cu) for interconnection and is encapsulated by thin and flexible polyimide (PI) films. Thus, this design allows the transducer to be folded to confirm to intersecting surfaces. The 1–3 composite with high electromechanical coupling efficiency can convert electrical voltages into mechanical vibration to excite ultrasonic waves. A fabrication method using magnetron sputtering was developed to fabricate the flexible ultrasonic transducer. Experimental tests showed that the developed transducer exhibited a resonant frequency of approximately 4.79 MHz, good electromechanical coupling (keff = 0.568), wide bandwidth (34.7%), and a broad measuring range over 12 cm propagation distance with a diffusion angle of 28.08°. Three elements of ultrasonic transducer are covered onto an orthogonal plane to cross-locate the objects under water environment. The experimental results showed that the proposed ultrasonic transducer achieved over 94.14% accuracy for 3D positioning. Therefore, our developed ultrasonic transducer indicates the potential for the applications requires 3D positioning and positioning detection.
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Acknowledgments
This work was supported in part by the National Natural Science Foundation of China (Grant No. 52175522), Fundamental Research Funds for the Central Universities (Grant No. 2022FZZX01–06) and Science Foundation of Donghai Laboratory (Grant No. DH-2022KF01002).
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Zhang, Z., Zhang, Z., He, J., Wang, Y. (2023). A Flexible and Highly Sensitive Ultrasonic Transducer for Accurate Three-Dimensional Positioning. In: Yang, H., et al. Intelligent Robotics and Applications. ICIRA 2023. Lecture Notes in Computer Science(), vol 14267. Springer, Singapore. https://doi.org/10.1007/978-981-99-6483-3_43
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