Mr. Jin Wang Profile

Jin Wang

at High School

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Proceedings Article | 20 January 2023 Paper

Temperature field of the skin irradiated by the xenon lamp

Wei Jin, Yunsong Feng, Jin Wang, Youcai Chen

Proceedings Volume 12555, 125550B (2023) https://doi.org/10.1117/12.2651513

KEYWORDS: Skin, Lamps, Xenon, Temperature metrology, Tissues, Thermal effects, Ultraviolet radiation, Solids, Mid-IR, Light

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The radiation spectrum of the xenon lamp ranges from ultraviolet to mid-infrared. When the skin is irradiatedbythexenon lamp, the skin temperature will change due to the absorption of the radiation. In order to evaluate whether theskintissue will be damaged when the human body is irradiated with a xenon lamp, it is necessary to obtain the temperaturefield of the skin irradiated by the xenon lamp.In this paper, two methods of numerical calculation and thermal effect test were used to compare and study the instantaneous temperature field of the skin irradiated by a 10Kw xenon lamp.Firstly, the three-layer structure model of human skin tissue was analyzed. Secondly, the heat transfer process of theskinirradiated by the xenon lamp was studied, and the instantaneous temperature field model was established. Thirdly, athermal effect test device was built, and the human skin tissue was replaced by the isolated pigskin tissue. In anindoorenvironment, the experiment of irradiating the pigskin tissue with a xenon lamp was carried out, and the temperatureofseveral positions of the pigskin tissue at different irradiation time was recorded by contact temperature measurement. Finally, using the Heat Transfer in Solids Module in COMSOL Multiphysics 5.5 software, the 3D transient temperaturefield of the skin was solved. The results of experimental test and numerical calculation were compared and analyzed. At the same irradiation time, the numerically calculating temperature value was higher than the experimental test value. Themean value of the absolute error between the numerically calculating temperature value and the experimental test valuewas 6.0°C, and the mean value of the relative error was 14%. The research results provide a scientific basis for thesafeuse of the xenon lamp.

Proceedings Article | 5 November 2020 Paper

Data acquisition system of linear array CCD based on ARM

Jin Wang, Zu-guo Wu, Yun-song Feng

Proceedings Volume 11567, 115672W (2020) https://doi.org/10.1117/12.2580009

KEYWORDS: Charge-coupled devices, Data acquisition, Control systems, Computing systems, LCDs, Clocks, Image sensors, Camera shutters, CCD image sensors

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Linear array CCD device has the characteristics of large pixel size, high precision, good resolution, wide spectral response, small volume and so on. It is widely used in image sensing, spectral analysis and non-contact measurement fields such as size, displacement and vibration measurement.In this paper, the general structure and timing control characteristics of linear CCD are analyzed, and the typical CCD chip Toshiba TCD1304 is studied. The CCD is a linear image sensor with high sensitivity and low dark current. The pixel size is 8um × 200um, 3648 pixels in total, and the wavelength response range is 300nm ~ 1100nm.Secondly, the 32-bit flash microcontroller STM32F103 based on the core of arm cortex m3 processor is used as the main control chip, and a set of CCD data acquisition system with flexible integration time adjustment function is designed by combining with the 12 bit high speed A/D converter, 2.8-inch TFT LCD and upper computer software.Finally, the whole system is tested, The test results of the system verify the feasibility of the driving timing design of linear array CCD. The driving timing signal is connected to the CCD device. Under the condition of different light incidence, the CCD works normally and outputs the corresponding video signal driven by the driving signal. The technical indexes of the system can meet the requirements of the system design, and provide a technical reference for similar CCD data acquisition system and lay the foundation for further image recognition and processing.

Proceedings Article | 5 November 2020 Paper

Optimization design of multifunctional xenon lamp trigger

Zuguo Wu, Jin Wang, Yun-song Feng, Bo Zhang, Wei Jin

Proceedings Volume 11567, 115673G (2020) https://doi.org/10.1117/12.2580185

KEYWORDS: Lamps, Xenon, Transformers, Power supplies, Light sources, Switches, Mercury, Capacitors, Tungsten

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Short arc xenon lamp is a point light source with high brightness, good light color and short start-up time. Short arc xenon lamp is widely used in industrial production, national defense and scientific research. It can be used as standard white light source, continuous ultraviolet radiation source, solar simulation light source, etc. it can also be used in infrared heating imaging furnace to melt refractory metals and materials. The trigger voltage and working voltage of different power short arc xenon lamp are different, so different trigger and working power supply need to be configured. On the basis of meeting the requirements of triggering 10kW short arc xenon lamp, this design optimizes the design idea, can automatically detect the relevant parameters of xenon lamp and power supply, and judge the triggering and working state of short arc xenon lamp according to the test data. If the trigger is not successful, it will be automatically triggered again. After the short arc xenon lamp is lit, it can detect and display working parameters such as electric power. The multi-functional xenon lamp flip-flop has been verified by software simulation, and it completely meets the design requirements. The trigger voltage of the trigger can be adjusted according to the need, and the trigger requirements of different power short arc xenon lamp can be met by replacing the peripheral mutual inductance coil.

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