Abstract: The one-dimensional position measurement using pseudorandom encoding is discussed in this paper. An application in navigation of automated guided movable systems is described. Incremental encoders are simpler, cheaper and they can provide a high measurement resolution. However, they have well-known drawbacks of accumulating reading errors and the loss of position because of power interruption. We propose solution providing a frequent autocalibration of the measuring system in a simple manner, using the pseudorandom encoding. The applied method provides a reliable detection of errors and makes the system resistant on oscillations along the movement course. A position transducer with 12-bit output resolution has been realized.
Keywords: Position transducer, autocalibration, encoding technique, measurement system.