In this study, we fabricated a sapphire based fiber-optic radiation sensor. To evaluate the fiber- optic radiation sensor, we measured the spectrum and intensity of the luminescence generated from the fiber-optic radi...In this study, we fabricated a sapphire based fiber-optic radiation sensor. To evaluate the fiber- optic radiation sensor, we measured the spectrum and intensity of the luminescence generated from the fiber-optic radiation sensor according to the thickness of the PMMA block by irradiation of gamma rays emitted from a Co-60 source. And the result was compared with the value calculated from the formula of Lambert-Beer.展开更多
A fiber-optic temperature sensor based on fiber tip polystyrene microsphere is proposed.The sensor structure can be formed simply by placing and fixing a polystyrene microsphere on the center of an optical fiber tip.S...A fiber-optic temperature sensor based on fiber tip polystyrene microsphere is proposed.The sensor structure can be formed simply by placing and fixing a polystyrene microsphere on the center of an optical fiber tip.Since polystyrene has a much larger thermal expansivity,the structure can be used for high-sensitive temperature measurement.By the illuminating of the sensor with a broadband light source and through the optical Fabry-Perot interference between the front and back surfaces of the polystyrene microsphere,the optical phase difference(OPD)or wavelength shift can be used for the extraction of temperature.Temperature measurement experiment shows that,using a fiber probe polystyrene microsphere temperature sensor with a spherical diameter of about 91.7 pm,a high OPD-temperature sensitivity of about-0.61796nm/℃and a good linearity of 0.9916 were achieved in a temperature range of 20℃-70℃.展开更多
提出了用于瞬态高温传感器动态性能的脉冲CO2激光激励系统,建立并分析了温度传感器瞬态响应数学模型.以此对蓝宝石光纤黑体腔高温传感器进行了动态性能实验研究.实验结果表明,传感器时间响应常数达30 m s,测试最高温度可达2 000℃,可以...提出了用于瞬态高温传感器动态性能的脉冲CO2激光激励系统,建立并分析了温度传感器瞬态响应数学模型.以此对蓝宝石光纤黑体腔高温传感器进行了动态性能实验研究.实验结果表明,传感器时间响应常数达30 m s,测试最高温度可达2 000℃,可以对武器发射、火药燃烧、爆炸等过程中瞬态高温进行测试.实验方法具有非接触、操作简便,精度高,实用性强等特点.展开更多
文摘In this study, we fabricated a sapphire based fiber-optic radiation sensor. To evaluate the fiber- optic radiation sensor, we measured the spectrum and intensity of the luminescence generated from the fiber-optic radiation sensor according to the thickness of the PMMA block by irradiation of gamma rays emitted from a Co-60 source. And the result was compared with the value calculated from the formula of Lambert-Beer.
基金This research was partially funded by Natural Science Basic Research Project of Shaanxi Province,China(Grant No.2020JM-560)Key Scientific Research Plan of Education Department of Shaanxi Province,China(Grant No.20JY028)the National Natural Science Foundation of China(Grant No.61704134).
文摘A fiber-optic temperature sensor based on fiber tip polystyrene microsphere is proposed.The sensor structure can be formed simply by placing and fixing a polystyrene microsphere on the center of an optical fiber tip.Since polystyrene has a much larger thermal expansivity,the structure can be used for high-sensitive temperature measurement.By the illuminating of the sensor with a broadband light source and through the optical Fabry-Perot interference between the front and back surfaces of the polystyrene microsphere,the optical phase difference(OPD)or wavelength shift can be used for the extraction of temperature.Temperature measurement experiment shows that,using a fiber probe polystyrene microsphere temperature sensor with a spherical diameter of about 91.7 pm,a high OPD-temperature sensitivity of about-0.61796nm/℃and a good linearity of 0.9916 were achieved in a temperature range of 20℃-70℃.
文摘提出了用于瞬态高温传感器动态性能的脉冲CO2激光激励系统,建立并分析了温度传感器瞬态响应数学模型.以此对蓝宝石光纤黑体腔高温传感器进行了动态性能实验研究.实验结果表明,传感器时间响应常数达30 m s,测试最高温度可达2 000℃,可以对武器发射、火药燃烧、爆炸等过程中瞬态高温进行测试.实验方法具有非接触、操作简便,精度高,实用性强等特点.
