Optical Fiber-Based Intensity-Modulated Cost-Effective Small Lean Angle Measurement Sensor
Tóm tắt
In this article, an optical fiber-based intensity-modulated angle measurement sensor is demonstrated for the measurements of small angles in the range of − 100 to 100 arcmin. At the outset, using a step index multimode polymer optical fiber, reflection-based proximity sensor was developed and the response of it is plotted to identify the maximum response region. At this maximum response region, the head of the sensor was fixed constant on a table top. A rotational table top is used to rotate the high reflective surface in the steps of 6 arcmin. Photo-voltages were recorded with applied tilt and a linear shift is observed. This sensor can be useful in automated machines for the precise alignment of tools, in the measurement of small lean and tilt angles and as a level sensor with sensitivity in the range of 9.5
$$\pm$$
0.210–10.93
$$\pm$$
0.200 mV/arcmin. Miniaturization of optical elements may lead to more compact design of this sensor.
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