Design of a structural strain measurement system based on slotted photomicrosensors

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Structural deformation in manufacturing machines, either due to thermal or finite stiffness effects, can affect their performance. Measurement of strain of a structural member is common for many safety critical systems but is not used very often for precision machinery to enable correction of resulting errors. This may be due in part to the temperature sensitivity of strain gauges or the complexity of installing many sensors to characterise complex bending of large structures often found on machines. This paper describes the design of a new strain sensing system based on a low-cost displacement sensing technique employing off-the-shelf slotted photomicrosensors and connecting rods to facilitate long range measurement. A small framework of a series of sensors is simulated with detailed analysis of the design. Finally, some preliminary validation results are presented which show sub-micron resolution and repeatability.
Original languageEnglish
Title of host publicationLaser metrology and machine performance XIV
Subtitle of host publication14th International Conference and Exhibition on Laser Metrology, Machine Tool, CMM & Robotic Performance : Lamdamap 2021
Publishereuspen
Volume14
Publication statusE-pub ahead of print - 11 Mar 2021
Event14th International Conference and Exhibition on Laser Metrology, Coordinate Measuring Machine and Machine Tool Performance - Virtual
Duration: 10 Mar 202111 Mar 2021
Conference number: 14
https://www.euspen.eu/events/virtuallamdamap-2021-2/

Conference

Conference14th International Conference and Exhibition on Laser Metrology, Coordinate Measuring Machine and Machine Tool Performance
Abbreviated titleLAMDAMAP 2021
Period10/03/2111/03/21
Internet address

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