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The piezoelectric Tonpilz transducer has many obvious advantages, such as simple structure, high electro-acoustic transforming efficiency, and high transmitting power. Its usefulness is limited because of its high mechanical quality factor Q. Transducer of Tonpilz type with double excitations has been invented to broaden the operating frequency band by stimulating two adjacent longitudinal vibration...
In order to enhance the quality of underwater acoustic communication, it is often used matching layer technique to improve the bandwidth performance of the transducer, But it is not easy to find the appropriate matching layer material because of no suitable material in nature, most of which is got by artificial synthesis and keeping it with an acoustic uniformity is also a painful task. An approach...
This paper is about the analysis and design of a longitudinal piezoelectric vibration exciter, which is required to produce forces that are more than 10N from 100Hz to 2kHz. The device consists of three main parts- the rear plate, driving element and working end. Equivalent Circuit Method (ECM in short) and Finite Element Analysis (FEA in short) are used to choose the material and size of each part...
The Langevin ultrasonic transducer is widely used in many high-power ultrasonic applications. The output power of a Langevin ultrasonic transducer is limited by many factors, and the electrical limit is one of most important factors. In this paper, the reason which restricts the improvement of the electrical limit is briefly analyzed for a typical Langevin ultrasonic transducer. In order to improve...
A cascade structure of half-wavelength transducer is proposed for improving power capacity of the transducer, and a dual-excited full-wavelength piezoelectric ultrasonic transducer consisting of two half-wavelength transducers is especially studied. Based on one-dimensional theory, the resonance and the anti-resonance frequency equations of the transducer are derived. The validity of the theoretical...
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