Study on 3D CFBG Vibration Sensor and Its Application

• 来源期刊: 光子传感器（英文版）
• 关键词: Three-dimensional (3D) matched chirped fiber Bragg grating (CFBG) edge filtering demodulation crosstalk
• 年，卷（期）: 2016,（1）
• 页码范围: 90-96
• 页数: 7页
• 语种: 英文
• DOI: 10.1007/s13320-015-0292-6

摘要

A novel variety of three dimensional (3D) vibration sensor based on chirped fiber Bragg grating (CFBG) is developed to measure 3D vibration in the mechanical equipment field.The sensor is composed of three independent vibration sensing units.Each unit uses double matched chirped gratings as sensing elements,and the sensing signal is processed by the edge filtering demodulation method.The structure and principle of the sensor are theoretically analyzed,and its performances are obtained from some experiments and the results are as follows:operating frequency range of the sensor is 10Hz-500Hz;acceleration measurement range is 2m·s-2-30m·s-2;sensitivity is about 70 mV/m.s-2;crosstalk coefficient is greater than 22 dB;self-compensation for temperature is available.Eventually the sensor is applied to monitor the vibration state of radiation pump.Seen from its experiments and applications,the sensor has good sensing performances,which can meet a certain requirement for some engineering measurement.