Design and characteristic analysis of micro multi-core fiber vibration sensor
Kun Li,
Mingli Dong,
Wu Zhao,
Le Wang,
Hongshun Zhang
Affiliations
Kun Li
Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science & Technology University, Beijing, 100192, China; Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science & Technology University, Beijing, 100016, China; Guangzhou Nan sha Intelligent Photonic Sensing Research Institute, Guangzhou, 511462, China
Mingli Dong
Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science & Technology University, Beijing, 100192, China; Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science & Technology University, Beijing, 100016, China; Guangzhou Nan sha Intelligent Photonic Sensing Research Institute, Guangzhou, 511462, China; Corresponding author.Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science & Technology University, Beijing, 100192, China.
Wu Zhao
Jiangsu Vocational Institute of Architectural Technology, Xuzhou, 221116, China
Le Wang
Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science & Technology University, Beijing, 100192, China; Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science & Technology University, Beijing, 100016, China; Guangzhou Nan sha Intelligent Photonic Sensing Research Institute, Guangzhou, 511462, China
Hongshun Zhang
Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science & Technology University, Beijing, 100192, China; Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science & Technology University, Beijing, 100016, China; Guangzhou Nan sha Intelligent Photonic Sensing Research Institute, Guangzhou, 511462, China
We proposed and fabricated a miniaturized multi-core fiber grating vibration sensor. The size of the miniaturized vibration sensor is 10mm × 10mm × 10 mm with a mass of only 0.25g. Finite element analysis and experimental tests were carried out to validate the performance of the vibration sensor. The experiment results indicate that the sensor has a sensitivity of 68.72 pm/g in the X direction and 64.52 pm/g in the Y direction within the operating frequency range of 20–240Hz. The cross-interference between the two directions of vibration measurement falls within 4 %. The sensor is suitable for measuring mechanical vibrations in the mid-low frequency range, especially in cases where size, quality, and distributed measurement are of particular concern.
