研究目的
Investigating the performance of an in-fiber acceleration sensor based on Fabry–Perot cavity structure for acceleration signal detection.
研究成果
The in-fiber acceleration sensor based on Fabry–Perot cavity demonstrates good acceleration sensing characteristics with a fringe contrast of 30 dB, minimum detectable acceleration of 0.928 mg, and a frequency response range of 10-90 Hz. Its compact, low-cost, and easy-to-fabricate design makes it suitable for industrial monitoring applications.
研究不足
The sensor's performance is sensitive to external vibration signals, requiring placement on a vibration isolation platform. The available bandwidth is limited to 10-90 Hz.
1：Experimental Design and Method Selection:
The sensor is based on a Fabry–Perot interferometer principle, utilizing two segments of optical fiber bonded on a silica v-groove with epoxy adhesive to form an external cavity F-P interference cavity.
2：Sample Selection and Data Sources:
The sensor's performance is tested using a vibration exciter, with the output monitored by a B&K Pulse Labshop system.
3：List of Experimental Equipment and Materials:
Tunable laser with narrow line-width, vibration exciter, power amplifier, signal generator, B&K Pulse Labshop system, UV adhesive, silica v-groove.
4：Experimental Procedures and Operational Workflow:
The sensor and a reference accelerometer are mounted on the vibration exciter. The exciter is driven by a signal generator and power amplifier to generate acceleration signals. The difference between the detection signals of the reference and FPI accelerometer is monitored.
5：Data Analysis Methods:
The output intensity change due to cavity length variation is analyzed to measure vibration acceleration.
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