A sensor arrangement method for on-line monitoring of the health status of a ship lock miter door

Abstract

The invention discloses a sensor arranging method for on-line monitoring the healthy state of a ship lock gate. According to the integral force bearing condition of the ship lock gate body, a gate pivot, a gate central seam, a bottom waterstop and a back pull bar of an underwater gate body structure and AB rods on a top pivot during opening and closing of the ship lock gate are positions bearing maximal forces. Fiber grating strain sensors, fiber grating temperature sensors and fiber crack detection sensors are arranged on the positions, wherein the fiber grating strain sensors detect real-time deformation displacement of gate force bearing positions, the fiber grating temperature sensor array compensate temperature, and the fiber crack detection sensors detect whether fibers are fractured to determine whether fracture occurs to the detection points. During operation of the ship lock, forces born by different parts of the gate body are non-uniform to generate vibration of different frequencies. Fiber vibration sensors are arranged to detect real-time vertical bouncing displacement of the gate body.

Description

technical field [0001] The invention relates to the technical field of health monitoring of hydraulic metal structures, in particular to a method for online monitoring of the health status of a miter door of a ship lock. Background technique [0002] The miter door of the ship lock works under low-speed and heavy-load conditions for a long time. During the opening and closing of the ship lock, the door body vibrates due to the influence of swell waves, dynamic water loads, water flow impact, and some microorganisms and floating objects in the water body. And the frequent jumping of the small deformation and displacement of the upper and lower doors will cause irreversible damage to the miter door. When the structural damage accumulates to a certain extent, it will cause serious consequences such as the breakage of the AB rod / back tie rod and cracks in the deep water area of ​​the door body. Not only Affecting navigation will also bring serious social impact and economic loss...

AI Technical Summary

Problems solved by technology

[0003] In order to ensure the safety of the ship lock structure, the existing detection method is to use regular outage manual maintenance and six-year cycle overhaul, which not only affects the channel transportation, but more importantly, manual detection cannot achieve real-time monitoring, and there are leaks in the deep position of the door body. The possibility of inspection has brought great security risks

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