Design and Experiment of Optical Fiber Flow Sensor with Gear Swing Rod
It kind of intensity modulation optical fiber flow sensor with gear swing rod is designed and modeled.Firstly,an inten-sity modulated optical fiber flow sensor system is proposed and the working principle of the sensor system is described,then the probe structure and working principle of the sensor are discussed in detail.After that,according to the principles of hydrodynam-ics and optical fiber intensity modulation,the mathematical model m of the sensor is established,on the basis of the theoretical model,a simulation example is analyzed,and the Q-M curve is obtained when the weight of the sensor swing rod m,the radius of the force plate r,the radius of the flow passage R,and the measured fluid density changed.Finally,the sensor detection exper-iment is carried out,and the I-curve and its fitting equation are obtained.The experimental results show that:the sensitivity of the sensor increases with the decrease of the weight of the sensor swing bar or the increase of the radius of the force plate;With the decrease of the density of the measured fluid or the increase of the radius of the flow passage,the sensitivity of the sensor will de-crease;There is an approximate linear relationship between the received light signal intensity of the sensor and the radian of the ef-fective emission area of the incident optical fiber bundle.The results show that the intensity modulation optical fiber flow sensor with gear swing rod designed in this paper can realize the detection of fluid velocity,and has good sensitivity and linearity.
Gear Swing RodOptical FiberFlow SensorDesign and Experiment
NETL
NSTL
万方数据
