Development of a Hybrid Ultrasonic and Optical Sensing for Precision Linear Displacement Measurement

Abstract

This study presents a proposed technique for displacement measurement in linear horizontal motion. The measurement system consists of a lines can sensor with built in illumination system, grating scale and an ultrasonic sensor. Once, the linescan transducer scans the grating scale optically, the displacement of the transducer is measured based on pixel shifting method. Additionally, the role of the ultrasonic sensor is to add the reference position for the linescan transducer and the current position in case of missing the position. The linescan transducer design includes; the illumination source and the division of the grating scale. The accuracy of the measurements is compared to white and infrared lights. After that, the comparison is built based on three scale divisions which are 0.5, 1 and 2 mm. Finally, the accuracy also is compared to different travelling ranges of motion. The displacement measurements of the proposed transducer is evaluated comparatively to Optiv Light Measurement (OLM) device.

Interfacing Arduino Boards with Optical Sensor Arrays: Overview and Realization of an Accurate Solar Compass

“…The main features of Arduino boards are described in numerous books and articles [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. Figure 1 shows a photo of an Arduino UNO board, where the various elements that make it up are indicated.…”

“…In contrast, information on the interface between Arduino and an optical sensor array is difficult to find in the scientific literature. Some examples involve an apparatus including 32 light-dependent resistors [ 13 ] or the use of the 128-pixel TSL1401CL array [ 14 , 15 ].…”