Design And Experimental Study Of A Novel Inclination Sensor Based On FBG

Fiber Bragg grating tilt sensor is suitable for monitoring and measuring a variety of occasions,including slope,transmission lines,lifting equipment and bridge structure surface level and tilt change monitoring.Compared with traditional sensors,optical fiber grating sensor is a kind of excellent properties,through the center wavelength drift will perceive the change of the external factors(temperature and strain),and high resistance to electromagnetic interference,strong corrosion resistance,easy to form the characteristics of the sensor network,which can realize quasi distributed measurement,suitable for a variety of complex environments.Of fiber Bragg grating strain,stress and displacement sensor has been relatively mature,and the research of fiber Bragg grating Angle sensor is still in its infancy,based on this,this article from the perspective of utility engineering,according to the principle of optical fiber Bragg grating sensor,combined with the mechanical balance principle and 3 d printing,design has developed two new type of Angle sensor and optical fiber grating is related to the performance test,do the main content is as follows:(1)The structure of the fiber Bragg grating and the sensing principle of temperature and strain are described,and the dip Angle sensing model of the fiber Bragg grating is established.The material,model,specification and size of the sensing unit of the dip Angle sensor of the fiber Bragg grating are selected and designed,including the establishment of 3D printing model and assembly molding.(2)Based on the lever balance principle,a high-precision fiber Bragg grating inclination sensor is designed.By adjusting the position of the lever fulcrum and the choice of the weight weight,the accuracy,sensitivity and range of the sensor can be adjusted,so as to be applicable to various special environments.For the first time,the 3D printing technology is introduced into the development of the sensing unit of the fiber Bragg grating inclination sensor,and the feasibility of the 3D printing technology for the sensor development is pointed out.(3)Based on the lever balance principle of fiber Bragg grating inclination sensor,fiber grating Angle sensor based on 3 d printing technology respectively,the calibration experiment shows the two wavelength changes in the value of the sensor and Angle cosine curve,to calculate the static characteristic of sensor,and the actual measurement error of sensors are analyzed.(4)In the seismic performance of composite column experiment,experiment with the method of step by step loading displacement under effective control the inclination of the pillar,will be based on the lever balance principle of fiber grating Angle sensor,fiber grating Angle sensor based on 3 d printing technology are used in pillars of Angle measurement,and compares the result with displacement meter measurement after conversion.The two new types of fiber Bragg grating Angle sensors designed and developed in this paper have the characteristics of light weight,small volume,wide range of measurement objects and adjustable measurement sensitivity.They can overcome the shortcomings of traditional Angle sensors and constitute a distributed measurement system to achieve two-dimensional Angle measurement.Design of fiber Bragg grating Angle sensor on the basis of the principle of leverage on the range of 0?60°,sensitivity coefficient is 26.92 PM/deg,static error is 0.799%;Design based on 3 d printing technology of fiber Bragg grating Angle sensor range of 0?60°,sensitivity coefficient is 7.419 PM/deg,static error of 2.922%.