|Table of Contents|

Adaptive Linear Frequency Multiplication in Double-frequency Laser Orientation System

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2005年02期
Page:
189-192
Research Field:
Publishing date:

Info

Title:
Adaptive Linear Frequency Multiplication in Double-frequency Laser Orientation System
Author(s):
ZHANG XiaoWANG Zhi-xingLI Xiang-yin
School of Sciences, NUST, Nanjing 210094, China
Keywords:
adaptive linear frequency mult iplication double-frequency laser interferometric system v ar-i able speed displacement measurement
PACS:
TN249
DOI:
-
Abstract:
In order to reduce the effect of variable speed on the resolution improvement via linear frequency mult-i plication in double-frequency laser interferometric system of displacement measurement, this paper presents a new adapt ive digital linear frequency mult iplication method. A counter with timing fiducial oscillator acts as a frequency multiplier, and the count value in the prior period is taken as the reference for the current period to give the decimal part of a signal period. From a numerical simulation on a practical possible mode: uniform acceleration-unifom speed-uniform deceleration, we obtain the relationship between the measurement error and the acceleration value. The simulation results show the feasibility of this method w hich provides a new and simple way through hardware linear multiplicat ion for frequency mult iplication of periodic signal w ith unequal periods.

References:

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Memo

Memo:
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Last Update: 2013-05-23