Real time frequency domain fibreoptic temperature sensor using ruby crystals
作者: J.R. AlcalaS-C. LiaoJ. Zheng
作者单位: 1Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
刊名: Medical Engineering and Physics, 1996, Vol.18 (1), pp.51-56
来源数据库: Elsevier Journal
DOI: 10.1016/1350-4533(95)00014-3
关键词: Biomedical sensoroptical temperature sensor
原始语种摘要: Abstract(#br)The excited state phosphorescence lifetime of ruby crystals is used to monitor temperature in the physiological range from 15° to 45°C with precision and accuracy less than 1°C, in real time. Precision of 0.1°C is attained with 3 min integration times. A 500 μm cubic ruby crystal bounded to the distal end of an optical fibre of similar core dimensions is excited with pulsed Ne-He laser light of about 9 μW average power. The instrument uses a sampler for data acquistion, and frequency domain methods for data fitting. The instrument amplifies the a.c. components of the detector output and band limits the signal to 800 Hz. The fundamental frequency of the excitation is set to 24.41 Hz to obtain 32 or less harmonics. This band-limited signal is sampled and averaged between 20 and...
全文获取路径: Elsevier  (合作)
影响因子:1.779 (2012)