Yonghong Shang

China Academy of Space Technology

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Co-Authors

Zeyuan Liu

Changchun University of Technology

Yanqiang Bi

China Academy of Space Technology

Xiangyu Zhao

Jilian Technology Group (China)

Yabin Jian

China Academy of Space Technology

Boying Lin

China Academy of Space Technology

Xinming Su

China Academy of Space Technology

Yabin Jian

China Academy of Space Technology

Wen Jing

China Academy of Space Technology

Jing Wang

Xi'an University of Science and Technology

Yin Zhong-ke

Hong Kong Polytechnic University

Cooperative Institutions

China Academy of Space Technology

Chinese Academy of Sciences

Changchun Institute of Optics, Fine Mechanics and Physics

Beihang University

Beijing Institute of Technology

State Key Laboratory of Remote Sensing Science

China Electronics Technology Group Corporation

Huazhong University of Science and Technology

Harbin Institute of Technology

Jilian Technology Group (China)

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Research on the color deviation detection for the satellite remote sensing image

Dongxing Tao Chao Zhang Yanqiang Bi Yonghong Shang Jing Wang

The color deviation, which refers to the different between the obtained image and the image under the standard light, is from the light source and reflection characteristic of the object. For satellite remote sensing, the length of the radiation transmission path is different for imaging of different latitudes, especially considering the effects of the atmosphere. Therefore, imaging for high latitude in the winter maybe brings some color deviation into the data. There have some color deviation detection methods for digital camera photo, but they are not fit for the remote sensing data, because of the large image range. In the work, a color deviation detection method for the satellite remote sensing image is developed. And the method is validated using the Landsat 8 images obtained in the winter and summer respectively.

False color

10.1117/12.2541001

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Designation and verification of road markings detection and guidance method

Xiyuan Li Yonghong Shang Jing Wang Jingchuan Zhang Runze Wang

With the rapid development of China's space industry, digitization and intelligent is the tendency of the future. This report is present a foundation research about guidance system which based on the HSV color space. With the help of these research which will help to design the automatic navigation and parking system for the frock transport car and the infrared lamp homogeneity intelligent test equipment. The drive mode, steer mode as well as the navigation method was selected. In consideration of the practicability, it was determined to use the front-wheel-steering chassis. The steering mechanism was controlled by the stepping motors, and it is guided by Machine Vision. The optimization and calibration of the steering mechanism was made. A mathematical model was built and the objective functions was constructed for the steering mechanism. The extraction method of the steering line was studied and the motion controller was designed and optimized. The theory of HSV, RGB color space and analysis of the testing result will be discussed Using the function library OPENCV on the Linux system to fulfill the camera calibration. Based on the HSV color space to design the guidance algorithm.

HSL and HSV

Chassis

RGB color model

10.1117/12.2294023

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Thermal Stress Analysis on Ceramic Honeycomb Regenerator

Yonghong Shang

This paper analyzed the heat exchange between ceramic honeycomb regenerator and gas, and established a heat transfer process mathematical model for ceramic honeycomb regenerator. The thermal stress of ceramic regenerator resulting from its temperature difference and restricted extension and contraction has been calculated and analyzed, the result provides a theoretical basis for design and operation of high temperature air combustion system.

Honeycomb

Honeycomb structure

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Research on High Temperature Protection Technology of Infrared Temperature Measuring Equipment in Space Environment

IOP Conference Series Earth and Environmental Science (2020)

Zeyuan Liu Yonghong Shang Xinming Su Wen Jing Boying Lin

Abstract With the increasing complexity of spacecraft structure and thermal design, it is more difficult to implement surface temperature measurement technology, and the temperature measurement area tends to diverse. Therefore, there is an increasing demand for the application of non-contact temperature measurement technology in spacecraft thermal test. This paper takes the application of infrared temperature measuring equipment in vacuum and high temperature environment as the research object, designs the thermal protection scheme and device of the equipment, and simulates and analyses the thermal protection of infrared temperature measuring equipment based on node network method. Through physical test, the device can effectively realize the thermal protection of equipment in vacuum and high temperature environment, and ensure that the equipment is in the normal working temperature range and its temperature measurement algorithm model is not affected, the accuracy of temperature measurement is better than ±2°C, which meets the use requirements in spacecraft thermal test.

Operating temperature

Atmospheric temperature range

Infrared heater

10.1088/1755-1315/512/1/012167

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Temperature measurements by infrared thermal imaging system in thermal vacuum test

Yonghong Shang Zeyuan Liu Qinghua Gao Xiangyu Zhao Yabin Jian

Infrared thermal imaging technology receives infrared radiation from the measured object, and the temperature distribution will be changed into a visual image by signal processing system. In order to verify the accurate measurement, the temperature measurement experiment under vacuum environment was carried out by constructing the low temperature standard blackbody radiation source, which temperature range was from -80°C to +100°C and temperature control stability was better than ±0.05°C/30min. The general formula of the theoretic temperature of measured object surface is deduced under ultra-high vacuum and cryogenic environment, which was based on the principle of thermal radiation theory. The capability of long-wave infrared thermal imager was verified from -40°C to +60°C. The static characteristics of measurement accuracy, repeatability and linearity were analyzed, and the dynamic measurement characteristics were also tested. The results were compared with the fine thermocouple measurement data.

Thermal infrared

10.1117/12.2550264

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