Settlement monitoring method based on MEMS (micro-electromechanical systems)

Abstract

The invention relates to a settlement monitoring method based on MEMS (micro-electromechanical systems), and relates to the field of safety monitoring industries such as bridges and tunnels and civil engineering construction. The settlement monitoring method is used for measuring change of structural settlement, the MEMS are used for measuring connecting rod position change caused by displacement change of a reference measuring point and measured points, and settlement or upheaval of the measured points is obtained by calculating angle and displacement change. According to the monitoring method, a reference measuring point mounting seat serves as a reference point of the measured points, every two measured points are rigidly connected through a metal connecting rod with a fixed length, and the positions of the metal connecting rods are correspondingly changed when the measured points are settled or heaved. The MEMS are used for measuring the corresponding relation between angle change and displacement change caused by connecting rod position change caused by displacement change of the reference measuring point and the measured points to obtain settlement or upheaval of the measured points.

Description

technical field [0001] The invention relates to a settlement monitoring method based on MEMS. The invention is used for measuring the change of structure settlement, and relates to safety monitoring industry fields such as bridge tunnels and civil engineering construction. Background technique [0002] At present, in the fields of foundation pit construction and civil safety monitoring, the vertical settlement change of soil and building dams is an important monitoring parameter. Generally, settlement measurement can be achieved by total station, differential pressure settlement system and other methods. [0003] The traditional method uses a total station to measure the vertical settlement change, calculates the vertical displacement change through the calculation of trigonometric functions, and then arranges a corresponding number of sensors according to the distribution of the actual measurement objects, so as to obtain the overall trend of the vertical deviation . [00...

AI Technical Summary

Problems solved by technology

[0006] When the traditional GPS or total station is measuring the measured soil, due to the limitation of the cost and the size of the sensor itself, the number of distribution points is limited. There is a certain degree of uncertainty in judging the displacement situation from the trend graph of the point

In addition, due to the precise manufacturing, high cost and poor impact resistance of GPS or total station, protection is required during transportation and installation. Once impact damage occurs, the sensor cannot be repaired, which will affect the cost of use and reliability.

And the operation needs to be carried out manually, it is difficult to achieve all-weather real-time measurement

However, the existing differential pressure settlement system has limitations due to the influence of the liquid level sensor used on stability and measurement accuracy.

[0007] To sum up, the traditional differential pressure settlement measurement method has certain limitations in terms of cost control, mechanical shock resistance, system stability, accuracy, etc., and it needs to lay out pipelines, waterways and other systems, and the installation and commissioning workload is relatively large. High cost, difficult to meet the requirements under the current working conditions

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