Amplitude-modulated resonant accelerometer employing parametric pump

Hemin Zhang; Dongyang Chen; Milind Pandit; Jiangkun Sun; Chun Zhao; Ashwin Seshia

doi:10.1063/5.0019296

Amplitude-modulated resonant accelerometer employing parametric pump

Hemin Zhang^*, Dongyang Chen, Milind Pandit, Jiangkun Sun, Chun Zhao, Ashwin Seshia

^*Corresponding author for this work

Electronic Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

This paper demonstrates a resonant accelerometer employing weakly coupled resonators for inertial force transduction. An ultra-low virtual mode coupling is established by employing the parametric pump in the coupled resonators to enhance the parametric sensitivity. This paper proposes that the amplitude of the driven resonator can be used for monitoring the input acceleration in a limited linear range around the veering point. In addition to the high-sensitivity improvement, the measurement complexity is also considerably reduced compared to the previous amplitude ratio readout sensors. The sensitivity is adjustable by changing the parametric pumping amplitude. The experimental results show that the noise power spectral density is ∼230 ng/√Hz, which is the best reported noise floor for resonant accelerometers based on weakly coupled resonators.

Original language	English
Article number	0019296
Journal	Applied Physics Letters
Volume	117
Issue number	16
DOIs	https://doi.org/10.1063/5.0019296
Publication status	Published - 21 Oct 2020

Bibliographical note

Funding Information:
Funding from Innovate UK and the Natural Environment Research Council is gratefully acknowledged.

Publisher Copyright:
© 2020 Author(s).

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title = "Amplitude-modulated resonant accelerometer employing parametric pump",

abstract = "This paper demonstrates a resonant accelerometer employing weakly coupled resonators for inertial force transduction. An ultra-low virtual mode coupling is established by employing the parametric pump in the coupled resonators to enhance the parametric sensitivity. This paper proposes that the amplitude of the driven resonator can be used for monitoring the input acceleration in a limited linear range around the veering point. In addition to the high-sensitivity improvement, the measurement complexity is also considerably reduced compared to the previous amplitude ratio readout sensors. The sensitivity is adjustable by changing the parametric pumping amplitude. The experimental results show that the noise power spectral density is ∼230 ng/√Hz, which is the best reported noise floor for resonant accelerometers based on weakly coupled resonators. ",

author = "Hemin Zhang and Dongyang Chen and Milind Pandit and Jiangkun Sun and Chun Zhao and Ashwin Seshia",

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AU - Zhang, Hemin

AU - Chen, Dongyang

AU - Pandit, Milind

AU - Sun, Jiangkun

AU - Zhao, Chun

AU - Seshia, Ashwin

PY - 2020/10/21

Y1 - 2020/10/21

N2 - This paper demonstrates a resonant accelerometer employing weakly coupled resonators for inertial force transduction. An ultra-low virtual mode coupling is established by employing the parametric pump in the coupled resonators to enhance the parametric sensitivity. This paper proposes that the amplitude of the driven resonator can be used for monitoring the input acceleration in a limited linear range around the veering point. In addition to the high-sensitivity improvement, the measurement complexity is also considerably reduced compared to the previous amplitude ratio readout sensors. The sensitivity is adjustable by changing the parametric pumping amplitude. The experimental results show that the noise power spectral density is ∼230 ng/√Hz, which is the best reported noise floor for resonant accelerometers based on weakly coupled resonators.

AB - This paper demonstrates a resonant accelerometer employing weakly coupled resonators for inertial force transduction. An ultra-low virtual mode coupling is established by employing the parametric pump in the coupled resonators to enhance the parametric sensitivity. This paper proposes that the amplitude of the driven resonator can be used for monitoring the input acceleration in a limited linear range around the veering point. In addition to the high-sensitivity improvement, the measurement complexity is also considerably reduced compared to the previous amplitude ratio readout sensors. The sensitivity is adjustable by changing the parametric pumping amplitude. The experimental results show that the noise power spectral density is ∼230 ng/√Hz, which is the best reported noise floor for resonant accelerometers based on weakly coupled resonators.

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VL - 117

JO - Applied Physics Letters

JF - Applied Physics Letters

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Amplitude-modulated resonant accelerometer employing parametric pump

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