Design and Construction a dual (Pressure and Liquid Level) Measuring by using Fiber optical Sensor

Abstract

            A microbend-based fiber optic sensor was designed and constructed to continuously track the level of liquids in the petroleum and chemical industries. In order to detect light, the device includes a microbend modulator (pair of teeth plates), a sensor and reference fiber, a glass tube containing water, a massage gage, a laser diode and an energy meter.  The intensity of the liquid and the pressure are calculated in order to eliminate the fluctuation of the light source relative to the reference fabric. The sensor is based on the principle of liquid pressure. Liquid pressure causes the fiber to be micro-bend, The liquid level is indicated when comparing the output power of the bending fiber caused by liquid pressure with that of the reference power. The main advantage of this device is the low cost of using toxic or hazardous liquids. The results show that this sensor is suitable for liquid level measurement applications, particularly in areas where electrical insulation and electromagnetic interference (EMI) resistance are strictly required. This sensor was checked for oil, methanol and distal water