Fast lock-in amplifier electrochemical impedance spectroscopy for big capacity lead-acid battery

Wang, Wubin; Chen, Dong; Yao, Wenxi; Chen, Wei; Liu, Zhengyu

doi:10.1016/j.est.2021.102693

Cited by 6 publications

(3 citation statements)

References 28 publications

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“…The concept of phase-sensitive detection has been improved by implementing a two-phase blocking system, which enables vector tracking [ 21 ]. The lock-in device is present in different research laboratories with different purposes, such as the characterization of electrical impedance [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ], biosensor [ 30 , 31 , 32 ] and optical spectroscopy [ 33 , 34 , 35 , 36 , 37 , 38 , 39 ]. The development of portable lock-in amplifiers are carried out via analog circuits, microcontrollers, FPGA, or a combination of these technologies, with SNR results between

and

dB [ 40 , 41 ].…”

Section: Introductionmentioning

confidence: 99%

In-Loco Optical Spectroscopy through a Multiple Digital Lock-In on a Linear Charge-Coupled Device (CCD) Array

Fonsêca

Rátiva

Lima

2023

Sensors

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Accurate and reliable measurements of optical properties are crucial for a wide range of industrial and commercial applications. However, external illumination fluctuations can often make these measurements challenging to obtain. This work proposes a new technique based on digital lock-in processing that enables the use of CCD spectrometers in optical spectroscopy applications, even in uncontrolled lighting conditions. This approach leverages digital lock-in processing, performed on each pixel of the spectrometer’s CCD simultaneously, to mitigate the impact of external optical interferences. The effectiveness of this method is demonstrated by testing and recovering the spectrum of a yellow LED subjected to other light sources in outdoor conditions, corresponding to a Signal-to-Noise Ratio of −70.45 dB. Additionally, it was possible to demonstrate the method’s applicability for the spectroscopic analysis of gold nanoparticles in outdoor conditions. These results suggest that the proposed technique can be helpful for a wide range of optical measurement techniques, even in challenging lighting conditions.

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and

dB [ 40 , 41 ].…”

Section: Introductionmentioning

confidence: 99%

In-Loco Optical Spectroscopy through a Multiple Digital Lock-In on a Linear Charge-Coupled Device (CCD) Array

Fonsêca

Rátiva

Lima

2023

Sensors

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show abstract

“…DLIA had higher precision and efficient noise immunity. Then a fast lock-in amplifier (LIA) is proposed [20]. It takes place of low-pass filter (LPF) with linear average definite digital Integrator, and applied in the electrochemical impedance spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

“…It takes place of low-pass filter (LPF) with linear average definite digital Integrator, and applied in the electrochemical impedance spectroscopy. The DLIA mostly use orthogonal vector structures, and its detection performance is influenced by SNR and system structure [16][17][18][19][20]. Currently, the optimization of DLIA is based on the traditional structure of orthogonal vector DLIA [17].…”

Section: Introductionmentioning

confidence: 99%

Research on weak signal detection of integral average digital lock-in amplifier

Chen

Wei

Chen

et al. 2021

Meas. Sci. Technol.

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In the process of detecting the amplitude and phase of the weak signal based on digital lock-in amplifier (DLIA), a low-pass filter (LPF) with an extremely low cut-off frequency is required. Even so, the effect is often not good. The detection results of amplitude and phase of weak signal are distorted and fluctuate sharply. To eliminate the difficulty of LPF design, and to reduce the distortion and output fluctuation of detection results of DLIA, this paper proposes a weak signal detection method based on integral average digital lock-in amplifier (IADLIA), which can be used for weak signal detection under strong noise. This method optimizes the structure of the traditional DLIA based on the principle of cross-correlation detection. And then this paper analyzes the influence of the cut-off frequency and signal-to-noise ratio of the LPF on the detection accuracy and output stability of the weak signal amplitude and phase. Finally, the corresponding weak-signal amplitude at the bearing rotating frequency is accurately detected by the proposed method, and the accurate identification of bearing faults is realized. The experimental results show that the IADLIA is characterized by stable output, strong anti-interference ability and high output accuracy. The proposed method can accurately detect the amplitude and phase information of the weak signal in a strong noise environment, get rid of the structure of LPF, and the overall performance is better than the traditional DLIA.

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Decision Support System for Multi-criteria Information-Logical Analysis of Scientific and Technical Projects of Innovative Enterprises

Kuznetsova

Kulikova

Розалиев

et al. 2023

Software Engineering Application in Systems Design

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Fast lock-in amplifier electrochemical impedance spectroscopy for big capacity lead-acid battery

Cited by 6 publications

References 28 publications

In-Loco Optical Spectroscopy through a Multiple Digital Lock-In on a Linear Charge-Coupled Device (CCD) Array

In-Loco Optical Spectroscopy through a Multiple Digital Lock-In on a Linear Charge-Coupled Device (CCD) Array

Research on weak signal detection of integral average digital lock-in amplifier

Decision Support System for Multi-criteria Information-Logical Analysis of Scientific and Technical Projects of Innovative Enterprises

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