理论分析了离子聚合物金属复合材料(ionic polymer metal composites,简称IPMC)的传感机理和数学模型;主要针对其传感性能进行了实验研究,给出了在不同工作频率下的传感器标定曲线与灵敏度测试结果,并分析了其灵敏变化原因;最后对传感...理论分析了离子聚合物金属复合材料(ionic polymer metal composites,简称IPMC)的传感机理和数学模型;主要针对其传感性能进行了实验研究,给出了在不同工作频率下的传感器标定曲线与灵敏度测试结果,并分析了其灵敏变化原因;最后对传感器进行的重复性能的测试。实验结果表明,IPMC传感器线性度好、重复性能好、在低频范围内灵敏度较高、检测结果稳定可靠。展开更多
A novel fiber Bragg grating(FBG)displacement sensor is proposed,which can achieve wide measuring range displacement detection with variable measurement precision due to its mechanical transfer structure of helical bev...A novel fiber Bragg grating(FBG)displacement sensor is proposed,which can achieve wide measuring range displacement detection with variable measurement precision due to its mechanical transfer structure of helical bevel gear.A prototype is designed and fabricated.The maximum detection displacement of this prototype is 1.751 m,and the precision grade changes from 0.2%to 6.7%.Through analyzing the experiment data which is obtained in the calibration experiment,the measuring range of this sensor is from 0 m to 1.532 m,and the wavelength shift errors between experiment data and theory calculation are all less than 5%.展开更多
A ring cavity fiber laser based on Fabry-Perot interferometer(FPI) is proposed and demonstrated experimentally for micro-displacement sensing.Simulation results show that the dips of the FPI transmission spectrum are ...A ring cavity fiber laser based on Fabry-Perot interferometer(FPI) is proposed and demonstrated experimentally for micro-displacement sensing.Simulation results show that the dips of the FPI transmission spectrum are sensitive to the cavity length of the FPI.With this characteristic,the relationship between wavelength shift and cavity length change can be established by means of the FPI with two aligned fiber end tips.The maximum sensitivity of 39.6 nm/μm is achieved experimentally,which is approximately 25 times higher than those in previous reports.The corresponding ring cavity fiber laser with the sensitivity for displacement measurement of about 6 nm/μm is implemented by applying the FPI as the filter.The proposed fiber laser has the advantages of simple structure,low cost and high sensitivity.展开更多
文摘理论分析了离子聚合物金属复合材料(ionic polymer metal composites,简称IPMC)的传感机理和数学模型;主要针对其传感性能进行了实验研究,给出了在不同工作频率下的传感器标定曲线与灵敏度测试结果,并分析了其灵敏变化原因;最后对传感器进行的重复性能的测试。实验结果表明,IPMC传感器线性度好、重复性能好、在低频范围内灵敏度较高、检测结果稳定可靠。
基金supported by the National Natural Science Foundation of China(Nos.61174018,41472260 and 41202206)
文摘A novel fiber Bragg grating(FBG)displacement sensor is proposed,which can achieve wide measuring range displacement detection with variable measurement precision due to its mechanical transfer structure of helical bevel gear.A prototype is designed and fabricated.The maximum detection displacement of this prototype is 1.751 m,and the precision grade changes from 0.2%to 6.7%.Through analyzing the experiment data which is obtained in the calibration experiment,the measuring range of this sensor is from 0 m to 1.532 m,and the wavelength shift errors between experiment data and theory calculation are all less than 5%.
基金supported by the National Natural Science Foundation of China(Nos.61275091 and 61327006)
文摘A ring cavity fiber laser based on Fabry-Perot interferometer(FPI) is proposed and demonstrated experimentally for micro-displacement sensing.Simulation results show that the dips of the FPI transmission spectrum are sensitive to the cavity length of the FPI.With this characteristic,the relationship between wavelength shift and cavity length change can be established by means of the FPI with two aligned fiber end tips.The maximum sensitivity of 39.6 nm/μm is achieved experimentally,which is approximately 25 times higher than those in previous reports.The corresponding ring cavity fiber laser with the sensitivity for displacement measurement of about 6 nm/μm is implemented by applying the FPI as the filter.The proposed fiber laser has the advantages of simple structure,low cost and high sensitivity.
