Position measurement using an enclosed signal field with pulse-width-modulated function

作     者：Ohyama, S Iizuka, J Takayama, J Kobayashi, A 

作者机构：Tokyo Inst Technol Grad Sch Sci & Engn Meguro Ku Tokyo 1528552 Japan 

出 版 物：《SENSORS AND ACTUATORS A-PHYSICAL》 (传感器与执行机构，A辑：物理传感器)

年 卷 期：2004年第113卷第1期

页      面：54-59页

核心收录：

学科分类：12[管理学] 1201[管理学-管理科学与工程(可授管理学、工学学位)] 0808[工学-电气工程] 08[工学] 0804[工学-仪器科学与技术] 

主　　题：enclosed signal field pulse-width modulation position measurement 

摘      要：A novel pulse-width-modulated (PWM) function is introduced for precise position measurement in an enclosed signal field. An amplitude modulation was used to light the LEDs for the previous study. However, the transform properties from the driving signal to the lighting intensities of the LEDs are non-linear, and accurate control of the lighting power was necessary. Therefore, a lighting function independent of these properties is desired. Well-known PWM functions are used to construct the enclosed signal field by simulation, and the precision of the phase detecting system is analyzed. A novel axial symmetry PWM function is found to be effective for orthogonal phase detection. (C) 2004 Elsevier B.V. All rights reserved.