The performance of a fiber optic displacement sensor for different types of probes and targets
Document Type
Article
Publication Date
1-1-2013
Abstract
A simple fiber optic displacement sensor is presented using a in multimode plastic bundled fiber and the intensity modulation technique. The performance of the sensor is compared for different types of probes and targets. The probe with the largest receiving core diameter demonstrates the highest linearity range, and increasing the number of receiving cores increases the sensitivity of the sensor. With a stainless steel target and the concentric bundled fiber with 16 receiving fibers as a probe, the sensitivity of the sensor is found to be 0.0220 mV/μm over 150 to 550 μm range and - 0.0061 mV/μm over 1100 to 2000 μm range. The target with a higher reflectivity shows a higher sensitivity. The linearity range for the front slope is almost similar for all targets tested. However, for the back slope, lower reflectivity objects have a relatively higher linearity range with the highest range of 1600 μm being obtained using plastic and aluminum targets. The simplicity of the design, high degree of sensitivity, dynamic range, non-contact measurement and low cost of the fabrication make it suitable for applications in industries for position control and micro displacement measurement in the hazardous regions. A graph is presented.
Keywords
Bundled fiber, Displacement sensor, Fiber-optic sensor
Divisions
fac_eng,PHYSICS
Publication Title
Laser Physics Letters
Volume
5
Issue
1
Publisher
John Wiley & Sons