Bridge deformation laser measuring device based on wireless sensor network

Abstract

The invention relates to the technical field of bridge deformation monitoring and discloses a bridge deformation laser measuring device based on a wireless sensor network. The device comprises an intelligent gateway, a sensor connecting rod, a sensor adjusting frame, a laser displacement sensor, a data line, a data acquisition module, connecting angle iron, a solar power line, a solar panel, a solar panel mounting frame and a reflector. The sensor connecting rod is fixed to a side of a pier through expansion bolts. The sensor adjusting frame is fixed at a front end of the sensor connecting rod; the laser displacement sensor is fixed at a top of the sensor adjusting frame; the reflector is adhered to a lower end of the pier through an adhesive; and an installation direction and a pointing direction of the laser displacement sensor are both parallel to a driving direction of an upper end of a bridge plate, the data acquisition module is fixed to a side surface of the pier through the connecting angle iron, the solar panel is fixed to the solar panel installation frame, the solar panel installation frame is fixed to the upper end of the bridge plate, and a function of real-time remotemonitoring of bridge deflection deformation can be achieved.

Description

technical field [0001] The invention relates to the technical field of bridge deformation monitoring, in particular to a bridge deformation laser measuring device based on a wireless sensor network. Background technique [0002] At present, the main methods used in monitoring the displacement or deformation of bridge structures are GPS method, leveling method, close-range photogrammetry and so on. GPS monitoring technology has the characteristics of high sampling rate (20Hz) and static and dynamic monitoring. It also has its unique advantages in large-scale structure monitoring, but it also has certain limitations. Due to the influence of satellite signals being blocked and multi-roadbed effects , the monitoring accuracy and reliability are not high, and the elevation accuracy is far lower than the accuracy of the horizontal position; in actual production, the level instrument method has a large workload, a complicated process, and has certain limitations, and it is difficul...

AI Technical Summary

Problems solved by technology

GPS monitoring technology has the characteristics of high sampling rate (20Hz) and static and dynamic monitoring. It also has its unique advantages in large-scale structure monitoring, but it also has certain limitations. Due to the influence of satellite signals being blocked and multi-roadbed effects , the monitoring accuracy and reliability are not high, and the elevation accuracy is far lower than the accuracy of the horizontal position; in actual production, the level instrument method has a large workload, a complicated process, and has certain limitations, and it is difficult to meet the actual monitoring requirements; close-up The photogrammetry method can measure the spatial position of multiple points at a certain moment at the same time, and the photo data can be compared at any time, but the absolute accuracy of observation is not as good as the traditional measurement method. The accuracy of the close-range photogrammetry method mainly depends on the longitudinal distance and focal length

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