Integration of fiber-optic sensors in measuring machines

• Improving application performance of fiber-optic as a non-contact measurement method.
• Increasing precision and speed of roundness measurement.
• Solving distortion issues in digital imaging by applying a projective transformation.
• An automated form inspection of boreholes in diesel engine nozzles.

In last years, optical metrology due to its capability in miniaturization and sensitivity became the primary solution in measurement of complex geometries and fragile pieces. Here, we propose a promising approach to perform highly accurate distance measurements using low-coherence fiber-optic sensors for quality inspection of nozzle orifices in fuel injection systems. In this effort, we develop an adaptive image processing algorithm in MATLAB and install the necessary hardware on a form tester to accelerate and simplify the aligning process. As a result, the repeatability of measurements is one order of magnitude improved while the standard deviation is almost 60% reduced.

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