红外光纤液位传感器的设计

DESIGN OF LIGUID SURFACE SENSING UNIF WITH INFRARED FIBREGLASS

本机是一种浮子式红外线光纤液位传感器，能随时显示液面的高度。本机的特点是：第一，由于伸到被测现场的只是两对光纤，不会有引发危险的任何电火花产生，光纤又能耐酸碱腐蚀，所以适用于易燃、易爆、酸碱度很大的恶劣环境，如各种油罐、酸碱反应塔液位高度的显示；第二，本机采用３８ＫＨｚ的交流发射光源，光纤送出的是固定的３８ＫＨｚ矩形脉冲，而不是平稳的直流光信号，接收端的工作频率也调在３８ＫＨｚ上，这样就提高了传感器的抗干扰能力；第三，采用不间断电源，不怕停电和意外断电。

This is a senting unit of measurable liguid surface with floating infrared fibreglass. It indicates the hihgness of liquid surface. Three traits in it are acidproof. basicproof, especially the sensing unit is applicable to the inflammable and bursting places because of both only fibreglass whthout flash. Such as oil storage vessel, reaction tower of acid and basic, The instrUment used alternating radiative source fzequency of 38 KHZ, sending rectangularr pulse of 38KHZ, receptor tuned in on 38KHZ also, such it improved in interference-free; It used ups saurce