Mr. ZhiXiang Zhang Profile

ZhiXiang Zhang

at Northwest Institute of Nuclear Technology

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Publications (3)

Proceedings Article | 5 November 2020 Paper

Research on focal length measurement of telephoto lens based on Polaris observation

Xin Zhou, DeChao Liu, ZhiXiang Zhang, Rui Cao, XuYang Li, XiangLong Gu

Proceedings Volume 11570, 115700K (2020) https://doi.org/10.1117/12.2579825

KEYWORDS: Collimators, Computer programming, Cameras, CMOS cameras, Moire patterns, Imaging systems, Spectrum analysis, Optoelectronics, Optical testing

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Proceedings Article | 18 December 2019 Paper

A calculation method of lightwave’s atmospheric refractive error based on single photoelectric theodolite

Xin Zhou, ZhaoHeng Du, ZhiXiang Zhang, Rui Cao, Yan Chen

Proceedings Volume 11341, 1134119 (2019) https://doi.org/10.1117/12.2544352

KEYWORDS: Refraction, Radar, Refractive index, Error analysis, Ray tracing, Ranging, Atmospheric propagation, Associative arrays, Target detection, Astronomy

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Proceedings Article | 24 October 2017 Paper

Realization of measurement method in angle intersection based on MATLAB

Xin Zhou, ZhiXiang Zhang, HongJing Zeng, Rui Cao, ZhaoHeng Du

Proceedings Volume 10462, 104622T (2017) https://doi.org/10.1117/12.2284945

KEYWORDS: MATLAB

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Accuracy Measurement on aerial track of moving target is one of the major target for photoelectric theodolite, which target is solved by angle intersection algorithm of two-stations. For analyzing the accuracy and the photoelectric theodolite of the angle intersection measurement, this paper simulated 6 aerocrafts’ tracks. L,K algorithms of coplanar rendezvous and MLE algorithms of non-uniplanar intersection were used to measure aerocrafts’ tracks. The measurement result was relative analyzed with simulation track in angle intersection, then the L,K ,MLE algorithm’s applicability was fixed. One aerocraft track of simulation was chosen to measure by MLE algorithm in different station-setting conditions. The measurement error was compared in intersection angle, azimuth angle, pitching angle, baseline length, station location. And the relation between the conditions and measurement accuracy of tracks was fixed. Also the condition of station-setting was fixed. The work above has directive significance in the intersection algorithm choice and station-setting later.

Measurement elements of optical equipment are teams of A, E, which is shorten as nAE. The nAE is belong to angle intersection measurement mechanism [1]. The optical equipment usually supplies angle information only, two-stations theodolites or n-station theodolites are used in solid intersection measurement, and spacial coordinate of aerocraft is fixed [2]. This method is called angle intersection measurement. This article simulated 4 aerocrafts tracks, and used 3 algorithms above to measure the tracks [3]. The measurement result was relative analyzed with simulation tracks in intersection angle, and the L, K, MLE algorithm’s applicability was fixed [4].

Usage of photoelectric theodolite faces the problem of station-setting, and the station-setting directly influences the measurement accuracy of track [5]. This article chooses one aerocraft track to measure by MLE algorithm in different condition of station-setting. The measurement error was relative analyzed in intersection angle, azimuth angle, pitching angle, baseline length and station location, by which the relation between measurement accuracy and 5 conditions was fixed. The condition of station-setting was fixed on the base.

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