光纤正被用于一种由Tohoku大学研制并由日本研究开发公司销售的运距离气体传感和监测系统。在这个系统中,光缆网从传感和监测中心一直延绵到为数众多的测量点,把波长为1～2μm的红外光束发射进各点,以传感被各测量点上产生的气体所吸收的程度,从而能够安全、迅速、精确地传感和监测各种类型的气体。该系统包括光发送和接收系统、光缆、气体检测器、运算数据处理单元和显示/报警单元。气体检测器安装在测量位置,而光发送和接收系统、运算数据处理单元和显示/报警单元安装在中央气体传感和监测中心,用光缆把这两部份连接起来。 Optical fiber is being used for a distance gas sensing and monitoring system developed by Tohoku University and marketed by Japan Research and Development Corporation. In this system, the optical cable network stretches from the sensing and monitoring center to a large number of measuring points and emits an infrared light beam with a wavelength of 1 to 2 μm into each point to sense the light absorbed by the gas generated at each measuring point So that various types of gases can be sensed and monitored safely, quickly and accurately. The system includes an optical transmitting and receiving system, an optical cable, a gas detector, an arithmetic data processing unit, and a display / alarm unit. The gas detector is installed at the measuring position, and the optical transmitting and receiving system, the arithmetic data processing unit and the display / alarm unit are installed in the central gas sensing and monitoring center, and these two parts are connected by the optical fiber cable.