Method for Determining the Resonance Frequency of a Fiber Optic Interferometric Accelerometer

Chen, Jiandong; Gao, Wenzhi; Chang, Tianying; Sun, Wei; Yu, Miao; Yang, Yue; Fu, Qunjian; Cui, Hong‐Liang

doi:10.1109/tim.2017.2751938

Cited by 15 publications

(5 citation statements)

References 19 publications

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“…The interference signal [31], [32] can be expressed by In equation 1, A represents the direct current component of the light intensity after the interference, and B is the alternating current component of the light intensity after the interference. C is the phase modulation depth.…”

Section: System Configurationmentioning

confidence: 99%

“…Zhang and Li [30] proposed an interference sensor based on DSM, which eliminates the influence of modulation depth C on the demodulation result, but the dynamic range is limited [30]. Chen et al [31] proposed and tested a three-component detector based on Michelson's interferometry. The system has an average system noise level of −123.55 re rad /Hz 1/2 , ranging from 0 Hz to 500 Hz, and the dynamic range of over 116 dB [31], [32].Then Tong et al [22] proposed a new algorithm, which could eliminate the interference of light intensity and the influence caused by the fluctuation of environment.…”

Section: Introductionmentioning

confidence: 99%

“…Chen et al [31] proposed and tested a three-component detector based on Michelson's interferometry. The system has an average system noise level of −123.55 re rad /Hz 1/2 , ranging from 0 Hz to 500 Hz, and the dynamic range of over 116 dB [31], [32].Then Tong et al [22] proposed a new algorithm, which could eliminate the interference of light intensity and the influence caused by the fluctuation of environment. This method introduced the carrier's third harmonic and high-pass filter, however the computation of this method was very complicated and difficult to be implemented by hardware [22].…”

Section: Introductionmentioning

confidence: 99%

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Large Dynamic Range and High Sensitivity PGC Demodulation Technique for Tri-Component Fiber Optic Seismometer

et al. 2020

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Three-component fiber optic seismometers are widely used in the detection of seismic signals. The arctangent approach of phase-generated carrier (PGC-Arctan) demodulation algorithm is one of the commonly used demodulation techniques in FOISs. Nonlinear factors such as phase modulation depth(C) variation and light intensity disturbance (LID) have an important impact on performance of traditional PGC demodulation algorithms. This paper introduces a new demodulation algorithm called Kalman filtering ellipse (PGC-Arctan-EKF) demodulation algorithm, which can improve the robustness of the fitting. In order to meet the requirements of high performance and low power consumption of seafloor sensing, Tri-Component fiber optic seismometer based on SoC(ARM +FPGA) is proposed in this paper. The phase self-noise of the system is better than −115 dB re rad /Hz 1/2 ,and the large signal can reach 66 dB re rad/Hz 1/2 @220Hz with the THD is −61.22 dB.

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Section: System Configurationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Large Dynamic Range and High Sensitivity PGC Demodulation Technique for Tri-Component Fiber Optic Seismometer

et al. 2020

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“…Q. Yu et al [17] reported F-P accelerometer based on fast white light interference. The accelerometer based on F-P interference can detect vibration signals as low as 10 Hz, while J. Chen et al [18], [19] also conduct in-depth research on the accelerometers based on Michelson interferometer. Based on such structure, the measurable lower limit frequency of the accelerometer can reach 0.005 Hz, while the optical path of the system is relatively complex and need high implementation cost.…”

Section: Introductionmentioning

confidence: 99%

A Fiber-Optic Accelerometer Based on Extrinsic Fabry-Perot Interference for Low Frequency Micro-Vibration Measurement

et al. 2022

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A fiber-optic accelerometer based on extrinsic Fabry-Perot interferometer (EFPI) is reported. The sensor adopts flywheel diaphragm structure as a sensitive element, where the mass block is bonded in the center, while the beam of the flywheel acts as a spring. The sensitive element forms single degree of freedom spring-mass-damper system. The parameters of the accelerometer are designed based on finite element simulation (FEM), and the transfer function of the sensor is established by numerical simulation. The experiments indicate that the sensor has a wide detection frequency band with the detectable ability for micro-vibration low as 0.01 Hz, and the sensitivity is 7.02 rad/g @20 Hz, and reach an average sensitivity of 6.39 rad/g in 5-20 Hz. The research shows that the accelerometer has a good development prospect in the field of low frequency micro-vibration detection.

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“…However, phase-generated carrier (PGC) demodulation algorithm has the advantages of wide dynamic range, high linearity and high sensitivity. It has been widely used in FOISs [7][8][9][10][11]. The conventional PGC demodulation algorithms are the differential-and-cross-multiplying (PGC-DCM) [12,13] and the arctangent (PGC-Arctan) [14,15].…”

Section: Introductionmentioning

confidence: 99%

Automatic carrier phase delay synchronization of PGC demodulation algorithm in fiber-optic interferometric sensors

Hou¹,

Guo²

2020

KSII TIIS

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Phase-generated carrier (PGC) demodulation algorithm is the main demodulation methods in Fiber-optic interferometric sensors (FOISs). The conventional PGC demodulation algorithms are influenced by the carrier phase delay between the interference signal and the carrier signal. In this paper, an automatic carrier phase delay synchronization (CPDS) algorithm based on orthogonal phase-locked technique is proposed. The proposed algorithm can calculate the carrier phase delay value. Then the carrier phase delay can be compensated by adjusting the initial phase of the fundamental carrier and the second-harmonic carrier. The simulation results demonstrate the influence of the carrier phase delay on the demodulation performance. PGC-Arctan demodulation system based on CPDS algorithm is implemented on SoC. The experimental results show that the proposed algorithm is able to obtain and eliminate the carrier phase delay. In comparison to the conventional demodulation algorithm, the signal-to-noise and distortion ratio (SINAD) of the proposed algorithm increases 55.99dB.

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Method for Determining the Resonance Frequency of a Fiber Optic Interferometric Accelerometer

Cited by 15 publications

References 19 publications

Large Dynamic Range and High Sensitivity PGC Demodulation Technique for Tri-Component Fiber Optic Seismometer

Large Dynamic Range and High Sensitivity PGC Demodulation Technique for Tri-Component Fiber Optic Seismometer

A Fiber-Optic Accelerometer Based on Extrinsic Fabry-Perot Interference for Low Frequency Micro-Vibration Measurement

Automatic carrier phase delay synchronization of PGC demodulation algorithm in fiber-optic interferometric sensors

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