Possibility for Control and Optical Filter Wheel Positioning Based on a Hall Sensor - Physics > Instrumentation and DetectorsReport as inadecuate




Possibility for Control and Optical Filter Wheel Positioning Based on a Hall Sensor - Physics > Instrumentation and Detectors - Download this document for free, or read online. Document in PDF available to download.

Abstract: This paper presents a controlling and positioning approach for an opticalfilter disk. In the known applications where Hall-effect sensors and magnetsradially positioned are applied, the purpose of the latter is to helpdeveloping a binary code used mainly for filter identification. The number ofsensors is equal to the maximum number of magnets that participate in formingthe filter identity code. Therefore, three sensors and the corresponding numberof magnets radially positioned for each position are required for theidentification of seven filters. The precise position of the filter disk isreached by counting up the steps of a stepper motor. The presented approachapplies only one Hall-effect sensor. The fore working front of one magnet,positioned along the disk periphery, is used to precisely mark each filterposition. At a certain distance after the main magnet, a second one ispositioned in order to form an identity code. The paper contains an algorithmfor optical filter disk control and positioning, along with the mathematicalformalism on which it is based.



Author: Atanas Marinov Atanassov, Lubomir Bankov

Source: https://arxiv.org/







Related documents