Patent ID: 8854034
Filing Date: 2014-10-07
Classification: G01D

Abstract:
1. A position detector system comprising: a first sensor unit configured to collect first data indicative of first positions of a moving object as the moving object traverses a first side of a rail; a first area of the position detector system where only output from the first sensor unit is valid; a second sensor unit configured to collect second data indicative of second positions of the moving object as the moving object traverses a second side of the rail; a second area of the position detector system where only output from the second sensor unit is valid; a third area of the position detection system where outputs from both the first and second sensor units are valid and where the first and second sensor units alternately perform collection of the first data and the second data, respectively; a common detection circuit that is configured to: a prediction computation unit that is configured to: a smoothing unit for applying a smoothing operation to the first and second provisional data to generate a series of positional outputs that are indicative of periodic positions of the moving object over a segment of the rail that is included in the third area; wherein the smoothing operation averages the first and second provisional data with a weight; wherein the weight has a value of one for provisional data that is associated with an entrance of the third area; wherein the weight has a value of zero for provisional data that is associated with an exit of the third area; and wherein the weight linearly changes in accordance with the entrance of the third area and the exit of the third area.