On the performance characterization of ultrasonic air transducers with radiating membranes

Mitra, Rupa

doi:10.1109/58.535487

Cited by 9 publications

(6 citation statements)

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“…The measurement of high frequency ultrasound in air has been reported [6], but was limited to relatively large, This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/ high-power transducers, with operating frequency up to around 100 kHz, and measurement was restricted to using acoustic microphone and interferometry techniques.…”

Section: Introductionmentioning

confidence: 99%

High-Frequency Measurement of Ultrasound Using Flexural Ultrasonic Transducers

2018

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Flexural ultrasonic transducers are a widely available type of ultrasonic sensor used for flow measurement, proximity, and industrial metrology applications. The flexural ultrasonic transducer is commonly operated in one of the axisymmetric modes of vibration in the low-kilohertz range, under 50 kHz, but there is an increasing demand for higher frequency operation, towards 300 kHz. At present, there are no reports of the measurement of high-frequency vibrations using flexural ultrasonic transducers. This research reports on the measurement of high-frequency vibration in flexural ultrasonic transducers, utilizing electrical impedance and phase measurement, laser Doppler vibrometry, and response spectrum analysis through the adoption of two flexural ultrasonic transducers in a transmitreceive configuration. The outcomes of this research demonstrate the ability of flexural ultrasonic transducers to measure highfrequency ultrasound in air, vital for industrial metrology.

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Section: Introductionmentioning

confidence: 99%

High-Frequency Measurement of Ultrasound Using Flexural Ultrasonic Transducers

2018

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“…Flexural transducers have a number of resonant modes that can be usefully exploited, some of which are axisymmetric, which are generally more useful. [4][5][6] Despite the widespread use of FUTs in parking sensors, ultrasonic alarms, and a range of other applications, there is relatively little published research on their design and operation. In this paper, we describe the general response of these ultrasonic sensors, focusing on readily available sensors operating at 40 kHz, although the findings also apply to sensors operating at higher frequencies.…”

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confidence: 99%

The electro-mechanical behaviour of flexural ultrasonic transducers

Dixon

Kang

Ginestier

et al. 2017

Applied Physics Letters

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Flexural ultrasonic transducers are capable of high electro-mechanical coupling efficiencies for the generation or detection of ultrasound in fluids. They are the most common type of ultrasonic sensor, commonly used in parking sensors, because the devices are efficient, robust, and inexpensive. The simplest design consists of a piezoelectric disc, bonded to the inner surface of a metal cap, the face of which provides a vibrating membrane for the generation or detection of ultrasonic waves in fluids. Experimental measurements demonstrate that during the excitation of the piezoelectric element by an electrical voltage, there are three characteristic regions, where the frequency of the emitted ultrasonic wave changes during the excitation, steady-state, and the final decay process. A simple mechanical analogue model is capable of describing this behaviour. V C 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license

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“…The strong electromechanical coupling effects of piezoelectric materials make themselves become one of the most important intelligent materials in terms of the abilities of actuation, sensing and control. The devices based on piezoelectricity have been expanded rapidly in applications from ultrasonic transducer [1], actuator [2], vibratory gyrosensor [3], and optical scanner [4], to precision positioning mechanism [5].…”

Section: Introductionmentioning

confidence: 99%