Implementation of PSD sensor for measurement of vibrations

Beziuk, Grzegorz; Grobelny, Andrzej; Witkowski, Jerzy S.; Marek, B.

doi:10.1109/icses.2008.4673471

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…PSD provides an excellent choice in the detection of oscillations of a rotating machine. PSD provides position data which is independent of detectors light spot size, focus and shape, and the laser spot's centre of gravity [19 ]. PSDs possess advantages like fast response speed, high measurement accuracy, superior position resolution, an attribute of non‐contact and simple operating circuits [20, 21 ].…”

Section: Introductionmentioning

confidence: 99%

Calibrated non‐contact vibrational harmonics measurement based on self‐vibration compensated 2D‐PSD with MEMS accelerometer using FFT analysis

Das¹,

Saha²,

Kumar³

2020

IET sci. meas. technol.

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This study presents a novel fast Fourier transform (FFT)‐based non‐contact vibrational harmonics measurement system using a position sensitive detector (PSD) along with calibration using a piezoelectric accelerometer. Frequency‐domain vibrational analysis is required as the changes in machine dynamics are directly related to its failures and could provide more insight into the vibration signal. In this regard, FFT is used for spectral analysis to detect the harmonics in the vibration signal. The novelty of the applied technique for detecting vibrational harmonics lies in its innate contactless nature where the vibration detection sensor i.e. PSD is placed at a particular distance from the vibrating target. Additionally, the parasitic and external vibrations, which might pose unforeseen errors in the detected vibration data, have been nullified by employing a self‐vibration technique using an ADXL‐345 three‐axis accelerometer. The results obtained through PSD have been calibrated via a standard Brüel & Kjaer (B & K) vibration measurement system which uses a piezoelectric accelerometer (B & K accelerometer). The proposed measurement technique is equipped with NI compact RIO‐9074 that features a real‐time processor and an FPGA. The system was observed to effectively measure the frequency range 5–600 Hz with a maximum relative error of 2% in FFT amplitudes.

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Section: Introductionmentioning

confidence: 99%

Calibrated non‐contact vibrational harmonics measurement based on self‐vibration compensated 2D‐PSD with MEMS accelerometer using FFT analysis

Das¹,

Saha²,

Kumar³

2020

IET sci. meas. technol.

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show abstract

“…There have been extensive studies on PSDs because of their numerous applications in the field of engineering. Devices used for human eye movement monitoring, machine tool alignment, vibration analysis and path tracking all utilize PSDs [ 20 , 21 , 22 , 23 , 24 , 25 ]. Unlike discrete element detectors such as charge-coupled device (CCD), a PSD can provide continuous position data and features a high position-resolution.…”

Section: Introductionmentioning

confidence: 99%

Vibration Measurement Method of a String in Transversal Motion by Using a PSD

Yang

2017

Sensors

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A position sensitive detector (PSD) is frequently used for the measurement of a one-dimensional position along a line or a two-dimensional position on a plane, but is more often used for measuring static or quasi-static positions. Along with its quick response when measuring short time-spans in the micro-second realm, a PSD is also capable of detecting the dynamic positions of moving objects. In this paper, theoretical modeling and experiments are conducted to explore the frequency characteristics of a vibrating string while moving transversely across a one-dimensional PSD. The theoretical predictions are supported by the experiments. When the string vibrates at its natural frequency while moving transversely, the PSD will detect two frequencies near this natural frequency; one frequency is higher than the natural frequency and the other is lower. Deviations in these two frequencies, which differ from the string’s natural frequency, increase while the speed of motion increases.

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Laser Beam Position-Dependent PSD-Based Calibrated Self-Vibration Compensated Noncontact Vibration Measurement System

Das

Saha

2019

IEEE Trans. Instrum. Meas.

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Implementation of PSD sensor for measurement of vibrations

Cited by 3 publications

References 1 publication

Calibrated non‐contact vibrational harmonics measurement based on self‐vibration compensated 2D‐PSD with MEMS accelerometer using FFT analysis

Calibrated non‐contact vibrational harmonics measurement based on self‐vibration compensated 2D‐PSD with MEMS accelerometer using FFT analysis

Vibration Measurement Method of a String in Transversal Motion by Using a PSD

Laser Beam Position-Dependent PSD-Based Calibrated Self-Vibration Compensated Noncontact Vibration Measurement System

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