Fibre optic pressure sensor for geotechnical applications

摘要：

In geotechnical and civil engineering, the measurement of parameters such as pore water pressure is of importance for diagnosis and monitoring of soil conditions and hence the infrastructure associated with it. A fibre optic pressure sensor based on the transverse loading of a sub-section of a fibre Bragg grating (FBG) for geotechnical applications is presented in this paper. When a load is applied to a sub-section of an FBG, a spectral drop-out is generated in the reflection spectrum, which exhibits a red shift in wavelength as the load is increased. A pressure transducer that allows a real-time measurement of pore water pressure using this technique is presented. A pressure measurement range of 300 kPa and a 0.66 kPa resolution was obtained when using a l pm wavelength resolution tuneable laser to interrogate the sensor.

关键词： Pore pressure fibre Bragg grating spectral drop-out transverse load

作者: R.Correia J.Li E.Chehura S.Staines S.W.James R.P.Tatam

作者单位: Engineering Photonics group, Cranfield University,Bedfordshire, MK430AL, United Kingdom

会议类型: 国际会议

会议名称: The 2nd International Workshop on Opto-electronic Sensor-based Monitoring in Geo-engineering(第二届地质(岩土)工程光电传感监测国际研讨会)

会议地点: 南京

会议语种:英文

页码: 91-95

在线出版日期: 2007-10-18（万方平台首次上网日期，不代表论文的发表时间）