A measurement method for three-dimensional inner and outer surface profiles and spatial shell uniformity of laser fusion capsule

Ma, Xianxian; Ni, He; Lu, Mengshuang; Liu, Zihao; Huang, Jingwen; Wang, Qi; Wang, Yun

doi:10.1016/j.optlastec.2020.106601

Cited by 3 publications

(1 citation statement)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To address these problems, a normal tracking differential confocal measurement method for multiple geometric parameters of the HSR with a common reference is proposed. The previously proposed differential confocal technique can be applied to measure the step sample surface and inside and outside surfaces of laser fusion capsules [16,17] , which are multilayer structures and similar to the HSR. However, these methods cannot accurately measure millimeter shell thickness of the HSR due to the deficiency of a measurement reference and long measurement time.…”

Section: Introductionmentioning

confidence: 99%

A normal tracking differential confocal measurement method for multiple geometric parameters of hemispherical shell resonator with a common reference

Liu,

Zhang,

et al. 2024

Meas. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

This paper proposes a normal tracking differential confocal measurement method for the inside and outside surface profiles, shell thickness uniformity, and central asymmetry of inside and outside surfaces of the hemispherical shell resonator (HSR). A differential confocal technique with high-transmittance focusing ability is used to measure a single point on the inside and outside surfaces of the HSR. The normal alignment measurement technique is used to accurately measure the inside and outside surfaces and shell thickness of the HSR with a common reference in one measurement process. The HSR is step-rotated to synchronously collect information on the inside and outside surfaces, and using the differential confocal sensor to measure the different normal-section profiles. The experimental results indicate successful measurement of HSR central asymmetry. The repeated measurement accuracy for the inside and outside surface profiles and thickness uniformity is better than 30 nm.

show abstract

Section: Introductionmentioning

confidence: 99%

A normal tracking differential confocal measurement method for multiple geometric parameters of hemispherical shell resonator with a common reference

Liu,

Zhang,

et al. 2024

Meas. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

show abstract

Study on blade zoning measurement point planning method

Zhang,

Fan,

Zhang

et al. 2024

Measurement

View full text Add to dashboard Cite

Scanning measurement of surface error and thickness variation of the hemispherical resonator

Zhai¹,

Guo²,

Chen³

et al. 2022

Appl. Opt.

View full text Add to dashboard Cite

Hemispherical resonant gyroscopes (HRGs) are solid-state vibration gyroscopes with the highest precision and are widely used in the aerospace field. The core part of the gyroscope is the resonator, which is a thin-walled hemispherical shell. Surface error and thickness variation of a hemispherical shell causes frequency splitting, which degrades the performance of the HRG. In order to guide the mass leveling of hemispherical resonator, this paper presents a new method for scanning measurement of the surface error and thickness variation of hemispherical resonators. First, a multi-axis platform is designed for noncontact sensor scanning measurements along the meridian and latitudinal lines of the hemispherical resonator. Second, the error model of the measurement system is established. The surface error of the standard sphere is measured to calibrate and compensate for the assembly errors of the measuring device. In addition, the identification accuracy of assembly errors and the influence of assembly errors on thickness measurement are simulated by a computer. Finally, the surface error and thickness variation of the hemispherical resonators are measured. The method is experimentally demonstrated and validated with a wavefront interferometry test. The results show that the method can achieve high precision and high repeatability, which is instructive for assessment of the machining error and further evaluation of the hemispherical resonator.

show abstract

A measurement method for three-dimensional inner and outer surface profiles and spatial shell uniformity of laser fusion capsule

Cited by 3 publications

References 16 publications

A normal tracking differential confocal measurement method for multiple geometric parameters of hemispherical shell resonator with a common reference

A normal tracking differential confocal measurement method for multiple geometric parameters of hemispherical shell resonator with a common reference

Study on blade zoning measurement point planning method

Scanning measurement of surface error and thickness variation of the hemispherical resonator

Contact Info

Product

Resources

About