Comparative analysis of the DFB fiber laser and fiber-optic interferometric strain sensors [PDF]
, 2007 The DFB fiber laser strain sensor is shown to provide an improvement in the minimum detectable length change by a factor of 275 at 2 kHz for an applied strain when compared with an interferometric sensor interrogated by at equivalent DFB laser.
Kirkendall, C. K. +2 more
core +4 more sources
Efficient fiber Bragg grating and fiber Fabry-Pe'rot sensor multiplexing scheme using a broadband pulsed mode-locked laser [PDF]
, 2005 A pulsed broadband mode-locked laser (MLL) combined with interferometric interrogation is shown to yield an efficient means of multiplexing a large number of fiber Bragg grating (FBG) or fiber Fabry-Perot (FFP) strain sensors with high performance ...
Flockhart, G M H +2 more
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An Offset Laser Measurement Method for the Deviation Analysis of Cylindrical Gears
Machines, 2021 Generally, in the laser measurement of gears, the laser beam passes through the center of the gear, and the laser displacement sensor reads the spatial distance from the gear involute tooth surface to the laser displacement sensor.
Ning Mei +3 more
doaj +1 more source
Measurement of Auto-Focus Driving Distance for Mobile Phone Camera Lens Using a Confocal Displacement Sensor [PDF]
한국정밀공학회지, 2018 In mobile phone cameras, usually a voice coil motor (VCM) is used as a micro-positioning device for the image autofocus (AF) because of its low cost, simplicity, and reliability.
Suk Woo Son, Hagyong Kihm
doaj +1 more source
Performance characterisation of a new photo-microsensor based sensing head for displacement measurement [PDF]
, 2016 This paper presents a robust displacement sensor with nanometre-scale resolution over a micrometre range. It is composed of low cost commercially available slotted photo-microsensors (SPMs).
Potdar, Akshay Anand +2 more
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A self-mixing laser sensor design with an extended kalman filter for optimal online structure analysis and damping evaluation [PDF]
, 2007 We have developed a new algorithm based on the extended Kalman filter, in order to improve the resolution of an optical displacement sensor. This new non contact sensor which provides vibration measurement with a very good accuracy might be used for ...
Bès, Caroline +4 more
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Multi-Sensor System For Level Measurements With Optical Fibres [PDF]
, 2002 A system for measuring liquid level in multiple tanks using optical fibre technology has been developed. The oil field service industry can benefit from this intrinsically safe technology.
Sánchez-Pena, José Manuel +3 more
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Possible explanations for different surface quality in laser cutting with 1 micron and 10 microns beams [PDF]
, 2012 In laser cutting of thick steel sheets, quality difference is observed between cut surfaces obtained with 1 micron and 10 micron laser beams. This paper investigates physical mechanisms for this interesting and important problem of the wavelength ...
Remy Fabbro +3 more
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A fibre optic sensor for the measurement of surface roughness and displacement using artificial neural networks [PDF]
, 1997 This paper presents a fiber optic sensor system, artificial neural networks (fast back-propagation) are employed for the data processing. The use of the neural networks makes it possible for the sensor to be used both for surface roughness and ...
Butler, C, Lu, Y, Zhang, K, Yang, QP
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Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2014 An on-machine measurement system to measure the workpiece's geometry or dimension plays an important role in manufacturing processes. A laser displacement sensor recently attracts more attention which enables on-machine high-speed continuous ...
Yuu NAGAI +2 more
doaj +1 more source