Wireless Handheld Fiber Bragg Grating Demodulator

Abstract

The invention discloses a wireless handheld fiber grating demodulator. The invention includes an optical circulator, a C-band spectrum analysis unit, an SLED light source, a CPU and its control unit; the optical circulator has three ports, the first port is connected to the SLED light source, the second port is connected to an external sensor, and the third port is connected to the C-band Spectral analysis unit; the CPU and its control unit include CPU processor, spectral data acquisition and communication and fitting unit, exposure time control unit, SLED power control unit and conversion processing unit; the CPU and its control unit, SLED light source and GPRS wireless transceiver unit are powered by a lithium battery. The present invention has a small overall volume, does not need an external power supply, and the collected data can be sent wirelessly; the spectrum can be effectively set in the optimal linear amplification area, so that the sensing and monitoring accuracy and stability can be optimally processed.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, in particular to a wireless hand-held optical fiber grating demodulator. Background technique [0002] At present, many of the prefabricated parts of prefabricated buildings in my country are composite components, such as laminated floor slabs, laminated balcony slabs, and laminated shear walls. During the process, there are potential safety hazards due to changes in the stress state; at the same time, due to the inherent characteristics of prefabricated buildings, their structural integrity is relatively weaker than that of cast-in-place structures. Therefore, it is necessary to strengthen the structural safety monitoring of prefabricated buildings to avoid major accidents. [0003] Optical fiber sensing technology is a new sensing technology developed in recent years. Compared with traditional mechanical and electronic sensing methods, optical fiber sensors have small size, light ...

AI Technical Summary

Problems solved by technology

[0004] Due to the need to monitor the large parts of prefabricated buildings under dynamic conditions such as production, transportation, and hoisting, the common demodulator commonly used in the market needs to be connected to the acquisition instrument and power supply, and cannot measure the internal deformation of the component when it is in motion. , so it cannot meet the monitoring requirements of prefabricated building components under dynamic conditions such as fabrication, transportation and hoisting

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