3D Ultrasonic Rangefinder on a Chip

Przybyla, Richard J.; Tang, Hao-Yen; Guedes, A.; Shelton, Stefon; Horsley, David A.; Boser, Bernhard E.

doi:10.1109/jssc.2014.2364975

Cited by 122 publications

(67 citation statements)

References 19 publications

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“…Acoustical measurement is ubiquitous in industrial applications, scientific research, and daily life, e.g., mobile and internet communication [1,2], exploration of underground mineral resources (oil, gas, coal, metal ores, etc.) [3], measurement of the in situ stresses of underground rock formation [4], and the inspection of mechanical properties of concrete [5,6], as well as intravascular ultrasound [7], medical imaging [8], biometric recognition [9], implantable microdevices [10], rangefinders [11], nondestructive detection [12][13][14], experimental verification of acoustic lateral displacement [15], inspection of a specific polarization state of a wave propagating in layered isotropic/anisotropic media [16,17], wave energy devices [18], and more. One of the key factors toward achieving a high-quality acoustic measurement is a good understanding of the properties of the acoustic transducers, e.g., the type of the transducers, the material property, and the geometric structure of the transducers.…”

Section: Introductionmentioning

confidence: 99%

Physical Characteristics of and Transient Response from Thin Cylindrical Piezoelectric Transducers Used in a Petroleum Logging Tool

Qu³

et al. 2019

Micromachines

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We report on a transient response model of thin cylindrical piezoelectric transducers used in the petroleum logging tools, parallel to a recently established transient response model of thin spherical-shell transducers. Established on a series of parallel-connected equivalent-circuits, this model provides insightful information on the physical characteristics of the thin cylindrical piezoelectric transducers, i.e., the transient response, center-frequency, and directivity of the transducer. We have developed a measurement system corresponding to the new model to provide a state-of-the-art comparison between theory and experiment. We found that the measured results were in good agreement with those of theoretical calculations.

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Section: Introductionmentioning

confidence: 99%

Physical Characteristics of and Transient Response from Thin Cylindrical Piezoelectric Transducers Used in a Petroleum Logging Tool

Qu³

et al. 2019

Micromachines

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“…Previous transmitter circuits [11,12] have used a conventional level shifter that consists of an nMOS differential pair and cross-coupled pMOS transistors. This structure, although it is very simple, has two main problems.…”

Section: High-voltage Transmittermentioning

confidence: 99%

“…Nevertheless, this topology suffers from a large area due to the use of several capacitors. This work presents a comparative analysis of two of the most used front-end amplifier configurations in sensors based on PMUTs: a voltage amplifier (VA) based on capacitive integration [11,13,15] and a charge-sensitive amplifier (CSA) [3,19]. Figure 5a shows a scheme of a front-end amplifier based on capacitive integration.…”

Section: Front-end Amplifiermentioning

confidence: 99%

Miniaturized 0.13-μm CMOS Front-End Analog for AlN PMUT Arrays

Zamora

Ledesma

Uranga

et al. 2020

Sensors

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This paper presents an analog front-end transceiver for an ultrasound imaging system based on a high-voltage (HV) transmitter, a low-noise front-end amplifier (RX), and a complementary-metal-oxide-semiconductor, aluminum nitride, piezoelectric micromachined ultrasonic transducer (CMOS-AlN-PMUT). The system was designed using the 0.13-μm Silterra CMOS process and the MEMS-on-CMOS platform, which allowed for the implementation of an AlN PMUT on top of the CMOS-integrated circuit. The HV transmitter drives a column of six 80-μm-square PMUTs excited with 32 V in order to generate enough acoustic pressure at a 2.1-mm axial distance. On the reception side, another six 80-μm-square PMUT columns convert the received echo into an electric charge that is amplified by the receiver front-end amplifier. A comparative analysis between a voltage front-end amplifier (VA) based on capacitive integration and a charge-sensitive front-end amplifier (CSA) is presented. Electrical and acoustic experiments successfully demonstrated the functionality of the designed low-power analog front-end circuitry, which outperformed a state-of-the art front-end application-specific integrated circuit (ASIC) in terms of power consumption, noise performance, and area.

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“…The obvious problem with these proposed methods is that they can only recognize hand gestures of big movements, and are limited to simple gestures or combinations of these simple gestures, such as: push, pull, slide left or right. Second, many methods use ultrasonic sensor array to estimate direction of arrival (DOA) or range [33][34][35], requiring a complex hardware setup and multiple (at least 3) sensors to form a specific geometry, such as: a triangle, a cross and a line. Third, though many works based on ultrasound tracking has been proposed [36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

A Method of Ultrasonic Finger Gesture Recognition Based on the Micro-Doppler Effect

Zeng

Kuang

et al. 2019

Applied Sciences

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With the popularity of small-screen smart mobile devices, gestures as a new type of human–computer interaction are highly demanded. Furthermore, finger gestures are more familiar to people in controlling devices. In this paper, a new method for recognizing finger gestures is proposed. Ultrasound was actively emitted to measure the micro-Doppler effect caused by finger motions and was obtained at high resolution. By micro-Doppler processing, micro-Doppler feature maps of finger gestures were generated. Since the feature map has a similar structure to the single channel color image, a recognition model based on a convolutional neural network was constructed for classification. The optimized recognition model achieved an average accuracy of 96.51% in the experiment.

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3D Ultrasonic Rangefinder on a Chip

Cited by 122 publications

References 19 publications

Physical Characteristics of and Transient Response from Thin Cylindrical Piezoelectric Transducers Used in a Petroleum Logging Tool

Physical Characteristics of and Transient Response from Thin Cylindrical Piezoelectric Transducers Used in a Petroleum Logging Tool

Miniaturized 0.13-μm CMOS Front-End Analog for AlN PMUT Arrays

A Method of Ultrasonic Finger Gesture Recognition Based on the Micro-Doppler Effect

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