Optical Fiber Sensing Equipment for Water Engineering Construction Behavior Integrated with Acoustic Emission Source Expansion Device

Abstract

The invention discloses an acoustic emission source expansion device integrated water engineering construction behavior fiber sensing apparatus. The apparatus comprises a baseboard, and a first side plate and a second side plate fixedly connected to two sides of the baseboard, the top of the first side plate is connected with the top of the second side plate through an arc-shaped fiber carrying channel, and the baseboard, the first side plate, the second side plate and the arc-shaped fiber carrying channel form a main common cavity hole; and a pair of sensing fibers is arranged in the arc-shaped fiber carrying channel, the sensing fibers are compressed in arc-shaped fiber carrying channel through a pressing block, the pressing block is provided with a plurality of springs, the springs compact the pressing block through a cover plate, and the cover plate is arranged on the first side plate and the second side plate. A sensing fiber acoustic emission sending apparatus laying device fusing the main common cavity hole, common cavity hexagonal pores and common cavity circular pores is provided for the first time, and innovatively uses multiform cavity pores, large and small dimension cavity holes and spatial different position cavity pores to construct a multi-level and multi-different duration acoustic emission source in order to realize influences on the multi levels and the multiple different durations of light information in the sensing fibers.

Description

technical field [0001] The invention relates to a water engineering construction behavior optical fiber sensing device integrated with an acoustic emission source expansion device, and belongs to the field of hydraulic structure health monitoring. Background technique [0002] Sensing optical fiber has two functions of "transmission" and "sensing". There are many kinds of sensors based on optical fiber sensing technology. The same parameter can be measured by different types of sensors, but the core idea of ​​optical fiber sensing technology is to detect light received by The modulation of external parameters can be divided into intensity modulation type, phase modulation type, frequency modulation type, wavelength modulation type and polarization state modulation type according to the principle of light modulation in optical fiber. With the development of optical information and sensing technology , Optical fiber sensing technology has made great progress, and has advantage...

AI Technical Summary

Problems solved by technology

[0003] Acoustic emission technology is an advanced non-destructive testing technology. It obtains the damage, fracture, deformation and other information inside the measured object by detecting and analyzing the sound waves generated by the measured object itself. This technology has a wide range of applications in petroleum, aviation, civil engineering and other fields. The key component of acoustic emission is the acoustic emission sensor that collects and detects sound waves. Traditional acoustic emission sensors are made of piezoelectric ceramics or piezoelectric crystal materials, which have poor anti-electromagnetic interference and short signal transmission. Disadvantages, by combining optical fiber sensing technology and acoustic emission technology, the shortcomings of poor anti-electromagnetic interference ability and short signal transmission can be avoided, and optical fiber sensing technology can make up for the ability of acoustic emission to monitor other information such as temperature. Therefore, the The integration of optical fiber sensing technology and acoustic emission sensing technology will greatly expand the ability of structure sensing and monitoring. At present, there is no report in the field of fusion of optical fiber sensing technology and acoustic emission sensing technology

Images