论文部分内容阅读
一、前言光纤具有绝缘、无电磁感应、防爆、量轻、细径、可挠、价格低廉等优点。光纤液位计因为是由玻璃材料制成,即使在强腐蚀、易燃、易爆、有毒气氛等恶劣环境下也能进行安全的、远距离的测量。同时也有较高的灵敏度,结构简单、灵活、多样、小巧,因而它的应用范围很广,国内在这方面的研究和应用还很少。光纤液位传感器克服了以前那种浮动式液位计存在的缺点:(1)难于小型化;(2)由于可动部分的存在,有可能出现故障,并且检测精度不高;(3)在油料等危险品存在的场所使用时,液位计需要防
First, the foreword Optical fiber with insulation, electromagnetic induction, explosion-proof, light weight, small diameter, flexible, low cost and so on. Fiber optic liquid level gauges are made of glass material for safe, long-distance measurements even in harsh environments such as strong corrosion, flammable, explosive and toxic atmospheres. At the same time, it also has higher sensitivity, simple structure, flexible, diverse and small size, so it has a wide range of applications. There is still little research and application in this field in China. Optical fiber liquid level sensor overcomes the shortcomings of the previous floating liquid level gauge: (1) it is difficult to miniaturize; (2) due to the existence of movable part, there is a possibility of malfunction and the detection accuracy is not high; (3) Oil and other dangerous goods in the presence of places, the need to prevent the level gauge