High-precision absolute linear position sensor based on a standard line measure
High-precision absolute linear position sensor based on a standard line measure is a scholarly work, published in 2018 in ''Izvestiâ vysših učebnyh zavedenij Priborostroenie''. The main subjects of the publication include measure, line, position, standard deviation, IEEE 1451, dimensional metrology, mathematics, and absolute. The full cycle of research and development of a high-precision absolute linear position sensor based on standard line measure is presented.The sensor uses a standard line measure of invar alloy, which is an incremental scale with 1 mm interval between strokes.Absolute measurements are realized using a magnetic channel for numbering of strokes and an optical channel for precise estimation of current sensor position.An image processing algorithm for calculating position in real time is developed.A three-step calibration procedure used to eliminate the systematic measurement error is described.According to performed test measurements, the developed sensor has an accuracy of 1.65 μm (3 standard deviations) at a speed of up to 3 m/s.Application of a standard line measure is noted as the main advantage of the development, which ensures unification and compatibility with standard metrology equipment.