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石油污染已经成为我国水域环境的主要问题之一,为了掌握石油污染的动态变化趋势,需实时在线测量水中石油浓度。从荧光测量的基本原理出发,研究了水中矿物油荧光检测机理、用荧光法和全光纤传感技术实现石油浓度测量的可行性,建立了水中油浓度的测算模型,确定了其荧光检测的最佳激发波长和荧光波长范围,根据得到的荧光特性设计了荧光激发、吸收和传输的光学系统。选用氙灯作为激发光源,设计了相应的检测系统及放大电路,通过以单片机为控制核心的高速数据采集电路实现了信号的采集转换,最后将数据输入计算机,处理得到了相应的石油荧光光谱。该方法可广泛应用于水中油检测方面。
Oil pollution has become one of the main problems in the water environment in our country. In order to grasp the dynamic trend of petroleum pollution, it is necessary to measure the oil concentration in water in real time. Based on the basic principle of fluorescence measurement, the fluorescence detection mechanism of mineral oil in water was studied. The feasibility of measuring oil concentration by fluorescence method and all-optical fiber sensing technology was established. The model of oil concentration in water was established, Good excitation wavelength and fluorescence wavelength range, according to the resulting fluorescence characteristics of the design of fluorescence excitation, absorption and transmission of optical systems. Using xenon lamp as the excitation light source, the corresponding detection system and amplifying circuit are designed. Through the high-speed data acquisition circuit with the single-chip microcomputer as the control core, the signal acquisition and conversion is realized. Finally, the data is input into the computer and processed to obtain the corresponding oil fluorescence spectrum. The method can be widely used in the detection of water oil.