A Measuring System for Inner Diameter of Small-caliber and Long Gun Bore Based on Frequency Domain Interferometry

doi:10.3969/j.issn.1000-1093.2019.05.021

Abstract

Abstract: The machining quality of two-stage light gas gun bore has asignificant effect on the accuracy of experimental data of shock loading in dynamic high pressure physics research. An inner diameter measuring system based on all-fiber frequency domain interferometry ranging technology is demonstrated，which is used to acquire the accurate inner diameter of bore with small caliber and large length-diameter ratio. The micro fiber-optic probes are used as ranging sensors to precisely measure the coordinates of measuring points in the bore. The inner diameter is calculated by using the elliptic equation to fit the coordinates. The measured result of 28 mm bore with a length of 7 400 mm indicates that the most deviation is 0.014 mm compared to the measured results of three-point inside micrometer. Key

Key words: smooth-borebarrel, frequencydomaininterferometry, small-caliber, innerdiametermeasurement

CLC Number:

TH745.3

MA Heli, TAO Tianjiong, LIU Shenggang, WANG Xiang, WENG Jidong. A Measuring System for Inner Diameter of Small-caliber and Long Gun Bore Based on Frequency Domain Interferometry[J]. Acta Armamentarii, 2019, 40(5): 1077-1082.

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第40卷第5期
2019 年5月兵工学报ACTA
ARMAMENTARIIVol.40No.5May2019