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

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...

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Main Authors: Che-Hua Yang, Tai-Chieh Wu
Format: Article
Language:English
Published: MDPI AG 2017-07-01
Series:Sensors
Subjects:
Online Access:https://www.mdpi.com/1424-8220/17/7/1643
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spelling doaj-f88cfbffe62246efb13d4be1bfa4e1102020-11-25T00:46:48ZengMDPI AGSensors1424-82202017-07-01177164310.3390/s17071643s17071643Vibration Measurement Method of a String in Transversal Motion by Using a PSDChe-Hua Yang0Tai-Chieh Wu1Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 10608, TaiwanGraduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 10608, TaiwanA 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.https://www.mdpi.com/1424-8220/17/7/1643position sensitive detector (PSD)dynamic natural frequency measurementvibration analyze
collection DOAJ
language English
format Article
sources DOAJ
author Che-Hua Yang
Tai-Chieh Wu
spellingShingle Che-Hua Yang
Tai-Chieh Wu
Vibration Measurement Method of a String in Transversal Motion by Using a PSD
Sensors
position sensitive detector (PSD)
dynamic natural frequency measurement
vibration analyze
author_facet Che-Hua Yang
Tai-Chieh Wu
author_sort Che-Hua Yang
title Vibration Measurement Method of a String in Transversal Motion by Using a PSD
title_short Vibration Measurement Method of a String in Transversal Motion by Using a PSD
title_full Vibration Measurement Method of a String in Transversal Motion by Using a PSD
title_fullStr Vibration Measurement Method of a String in Transversal Motion by Using a PSD
title_full_unstemmed Vibration Measurement Method of a String in Transversal Motion by Using a PSD
title_sort vibration measurement method of a string in transversal motion by using a psd
publisher MDPI AG
series Sensors
issn 1424-8220
publishDate 2017-07-01
description 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.
topic position sensitive detector (PSD)
dynamic natural frequency measurement
vibration analyze
url https://www.mdpi.com/1424-8220/17/7/1643
work_keys_str_mv AT chehuayang vibrationmeasurementmethodofastringintransversalmotionbyusingapsd
AT taichiehwu vibrationmeasurementmethodofastringintransversalmotionbyusingapsd
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