Dynamic monitoring method and device of stress sensitization fiber bragg grating of locking rods of railway turnout switch machine

Abstract

Disclosed is dynamic monitoring method and device of a stress sensitization fiber bragg grating of locking rods of a railway turnout switch machine. A fiber bragg grating strain gauge is tightly fixed between two semi-circular clamping blocks of each locking rod through a screw, the large strain capacity generated by the long distance between the two clamping blocks of each locking rod is applied to the fiber bragg grating for sensitization through a rigid lengthened arm, fiber bragg grating temperature compensation pieces connected in series remove the influence of the environmental temperature, and all the devices are sealed in a protective box. More than 10 turnout locking rods to be detected can be connected to a multi-path channel demodulator through transmission optical fibers, and the turnout locking rods to be detected are demodulated and then input to a data processing terminal for data processing and displaying. When the locking rods of the turnout switch machine work, a system detects the switching force, the intensity and direction of locking force, switching speed, switching time and other data dynamically on line, and compares the data with values stored in the history to obtain whether the turnout switch machine works normally or not, and the result is uploaded to a monitoring department in real time to achieve dynamic on-line monitoring.

Description

technical field [0001] The invention relates to a fiber grating dynamic monitoring method and device for stress-increasing locking rods of railway turnout switch machines. The invention belongs to the technical field of safety monitoring of fiber grating sensing technology applied to railway transportation and urban rail transit. It is a fiber grating detection device and monitoring system based on fiber bragg grating sensing technology to increase the stress of the locking rod of the railway switch machine. When the locking rod of the railway switch machine moves, it can dynamically and online detect its conversion force , The size and direction of locking force, switching speed, switching time and other data, and compare these data with the values ​​stored in the history, and draw a conclusion whether the working status of the switch machine is normal. Background technique [0002] As the conversion equipment for railway line change and line intersection and separation, t...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this switch machine monitoring system based on image processing technology is that the camera needs to be installed next to the site switch machine in poor conditions, and the lens and camera light source are easily polluted by dust and oil.

For the switch machine of AC motor, since the three-phase motor is a multi-input and multi-output system, the electromagnetic torque cannot be obtained directly by the magnitude of the current, and the relationship between the output power and output force of the three-phase motor can only be indirectly used to obtain Measure the power to solve the output force of the switch machine

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