Self-calibration type measuring device and method for vertical displacement or deformation of large structure

Abstract

The invention discloses a self-calibration type measuring device and method for vertical displacement or deformation parameters of a large structure. The self-calibration type measuring device comprises a data processing center, an imaging system, a reference target, a static force level gage and one or more measuring targets. The static force level gage comprises a plurality of sedimentation probes and a liquid passing pipe, the sedimentation probes and the measuring targets are fixed to the side wall or the top of the large structure, the reference target is arranged on one certain sedimentation probe, and the reference target and the measuring targets carry out imaging at different positions of a sensitive element of the imaging system. After the data processing center obtains measuring results of the static force level gage and the imaging system, the displacement or deformation parameters of a measuring point are obtained according to the measuring results of the sedimentation probes, the reference target and the measuring targets. According to the self-calibration type measuring device and method for vertical displacement or deformation of the large structure, the situation that measuring errors of the system are caused due to displacement caused by loads borne by the imaging system or deformation of a self-installation base or the like of the measuring system is avoided, and the measuring precision is improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical measurement, and relates to a displacement and deformation measurement device for large structures, in particular to a self-calibrating remote displacement or deformation measurement device and method. Background technique [0002] Large-scale structures include bridges, dams, tunnels, slopes and housing buildings, etc., and their deformation mainly includes static deformation and dynamic deformation. For short-term deformation caused by wind, temperature, earthquake, traffic load or on-site construction, the monitoring of its parameters plays an important role in the safety assessment and analysis of the target. [0003] For traditional large structures such as bridges, the instruments for deformation detection include dial indicators, dial gauges, accelerometers, levels, and theodolites. At present, these instruments are still widely used in bridge acceptance and regular inspection, but they...

AI Technical Summary

Problems solved by technology

The main problem with this type of displacement sensor at present is that the CCD image sensor needs to be used in conjunction with a collimated laser, which increases the complexity of the system

The problem with this solution is: when the monitoring system is used in tunnels, caves, etc., both the CCD camera and the measurement target will have displacement and deformation due to the influence of external loads, and because the two installation positions are different , the displacement of the measurement target and the CCD camera caused by the external load is different, resulting in a large error in the measurement result, which affects the measurement accuracy

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