Ms. Meng Wang Profile

Meng Wang

at Xi'an Univ of Technology

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Publications (2)

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Proceedings Article | 18 March 2021 Paper

Research on fiber Bragg grating sensors for strain monitoring at cryogenic temperatures

Hongchun Gao, Xuefeng Wang, Caijie Tang, Baoyong Li, Xiaolong Yi, Tian Lan, Yong Yang, Meng Wang, Sa Yang

Proceedings Volume 11780, 117801H (2021) https://doi.org/10.1117/12.2590694

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In this paper, fiber Bragg grating (FBG) sensors for strain monitoring at cryogenic temperatures were proposed and demonstrated. The strain sensitivity, strain repeatability and temperature compensation effect of FBG sensors were studied, within the temperature range of -196°C to 20°C. The strain sensitivity of FBG sensors at cryogenic temperatures was tested by quartz specimens with low thermal expansion coefficient. Experimental results show that the strain sensitivity of the relative change of the central wavelength for the FBG is 0.784, which almost does not change with the temperature. The repeatability of the adhesive used for FBG strain sensors at cryogenic temperatures was tested. Experimental results show that FBG sensors have good adaptability to cryogenic temperatures, and the strain repeatability is within 1.0% FS. The zero drift of the FBG strain sensor was compensated by using the FBG temperature sensor, and the strain error is less than 5% of the measured values with the compensation at cryogenic temperatures. Compared with the traditional electrical strain gauge used at cryogenic temperatures, FBG strain sensors have advantages in non-sensitivity drift and good zero drift compensation effect, and they can play an important role in the structural health monitoring at cryogenic temperatures such as spacecraft tanks, fuel pipelines, and so on.

Proceedings Article | 28 February 2017 Paper

The design of common aperture and multi-band optical system based on day light telescope

Jiao Chen, Ling Wang, Bo Zhang, Guoqi Teng, Meng Wang

Proceedings Volume 10256, 1025613 (2017) https://doi.org/10.1117/12.2256490

KEYWORDS: Telescopes, Electro optical systems, Electro optics, Weapons, Imaging systems, Optical instrument design, Prisms, Optical design, Charge-coupled devices, Televisions

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As the development of electro-optical weapon system, the technique of common path and multi-sensor are used popular, and becoming a trend. According to the requirement of miniaturization and lightweight for electro-optical stabilized sighting system, a day light telescope/television viewing-aim system/ laser ranger has been designed in this thesis, which has common aperture. Thus integration scheme of multi-band and common aperture has been adopted. A day light telescope has been presented, which magnification is 8, field of view is 6°, and distance of exit pupil is more than 20mm. For 1/3" CCD, television viewing-aim system which has 156mm focal length, has been completed. In addition, laser ranging system has been designed, with 10km raging distance. This paper outlines its principle which used day light telescope as optical reference of correcting the optical axis. Besides, by means of shared objective, reserved image with inverting prism and coating beam-splitting film on the inclined plane of the cube prism, the system has been applied to electro-optical weapon system, with high-resolution of imaging and high-precision ranging.

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