Beam profile measurement on HITU transducers using a thermal intensity sensor technique

Wilkens, Volker; Sonntag, Sven; Jenderka, Klaus-Vitold

doi:10.1088/1742-6596/279/1/012018

Cited by 4 publications

(2 citation statements)

References 1 publication

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“…Hydrophones are used to evaluate the spatial distribution (acoustic field) of ultrasound sound pressure created by probes for ultrasonic diagnosis equipment and ultrasonic application equipment. [7][8][9][10][11][12][13][14][15][16][17][18] However, acoustic cavitation occurs in high-intensity ultrasound acoustic fields, for example, at the focal point of HIFU and in ultrasound cleaners. If such acoustic fields are measured using a general commercial hydrophone, its surface electrode and piezoelectric element will be damaged by the high sound pressure and acoustic cavitation, making measurement impossible.…”

Section: Introductionmentioning

confidence: 99%

Development of anticavitation hydrophone using a titanium front plate: Effect of the titanium front plate in high-intensity acoustic field with generation of acoustic cavitation

Shiiba

Okada

Kurosawa

et al. 2016

Jpn. J. Appl. Phys.

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Novel anticavitation hydrophones were fabricated by depositing a hydrothermally synthesized lead zirconate titanate polycrystalline film at the back of a titanium front plate. These anticavitation hydrophones were not damaged by the measurement of the acoustic field formed by a high-intensity focused ultrasound (HIFU) device. Their sensitivity was improved by approximately 20 dB over that of the conventional anticavitation hydrophone by modifying their basic structure and materials. The durability of the anticavitation hydrophone that we fabricated was compared by exposing it to a high-intensity acoustic field at the focal point of the HIFU field and in the water tank of an ultrasound cleaner. Therefore, the effect of the surface of the titanium front plate on acoustic cavitation was investigated by exposing such a surface to the high-intensity acoustic field. We found that the fabricated anticavitation hydrophone was robust and was not damaged easily, even in the focused acoustic field where acoustic cavitation occurs.

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Section: Introductionmentioning

confidence: 99%

Development of anticavitation hydrophone using a titanium front plate: Effect of the titanium front plate in high-intensity acoustic field with generation of acoustic cavitation

Shiiba

Okada

Kurosawa

et al. 2016

Jpn. J. Appl. Phys.

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“…Typically, ultrasound is irradiated at a high frequency, and the resulting acoustic field distribution should be measured with a hydrophone. [10][11][12][13][14][15][16][17][18][19][20][21] However, electrodes and piezoelectric elements of normal commercial hydrophones are damaged by high sound pressure and acoustic cavitation when measuring acoustic fields in ultrasound apparatuses that employ highintensity ultrasound, such as ultrasound cleaners and HIFU devices. Therefore, it is difficult to measure such highintensity acoustic fields using normal commercial hydrophones.…”

Section: Introductionmentioning

confidence: 99%

Frequency characteristics of receiving sensitivity and waveform of an anti-acoustic cavitation hydrophone

Shiiba

Okada

Uchida

et al. 2014

Jpn. J. Appl. Phys.

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Novel anti-cavitation hydrophones were fabricated by depositing a hydrothermally synthesized lead zirconate titanate polycrystalline film on the back of a titanium plate. These hydrophones were not damaged by the measurement of the acoustic field formed by a high-intensity focused ultrasound (HIFU) device. The hydrophones were designed using Mason’s equivalent circuit and by numerical simulation to improve their receiving characteristics for the measurement of the HIFU device. High receiving sensitivity with flat frequency characteristics was obtained by using a backing material with a specific acoustic impedance of about 20 × 106 kg/(m2 s) [Rayl]. We developed a new type of hydrophone using a tin and titanium rods as backing materials, which have specific acoustic impedances of 24 × 106 and 27 × 106 kg/(m2 s), respectively. The fabricated anti-cavitation hydrophone showed wide frequency characteristics of the receiving sensitivity. Furthermore, we observed the output waveform with distortion due to nonlinear propagation using the fabricated anti-cavitation hydrophone. This hydrophone was not damaged by exposure to a high-intensity acoustic field of an ultrasound cleaner under acoustic cavitation for duration of about ten times longer than the conventional commercial hydrophone.

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Ignition of dust-air atmospheres by ultrasonic waves

Simon

Wilkens

Fedtke

et al. 2013

Journal of Loss Prevention in the Process Industries

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Beam profile measurement on HITU transducers using a thermal intensity sensor technique

Cited by 4 publications

References 1 publication

Development of anticavitation hydrophone using a titanium front plate: Effect of the titanium front plate in high-intensity acoustic field with generation of acoustic cavitation

Development of anticavitation hydrophone using a titanium front plate: Effect of the titanium front plate in high-intensity acoustic field with generation of acoustic cavitation

Frequency characteristics of receiving sensitivity and waveform of an anti-acoustic cavitation hydrophone

Ignition of dust-air atmospheres by ultrasonic waves

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