Foundation pit intelligent monitoring method and monitoring system based on MEMS sensor

Abstract

The invention discloses a comprehensive foundation pit monitoring system based on an MEMS sensor. The comprehensive foundation pit monitoring system comprises an MEMS acceleration sensor module, a frequency selection module, an analog-to-digital conversion module and a data processing module, and the analog-to-digital conversion module is electrically connected with the data processing module through a system bus. The invention further comprises a monitoring method. The monitoring method comprises the following steps that a reference point is selected, and the foundation pit support horizontaldisplacement is calculated to obtain a horizontal displacement curve; MEMS acceleration sensors are arranged according to the curvature of the horizontal displacement curve; and the deformation of the position where inclination angle sensing equipment is located is automatically detected by utilizing the MEMS inclination angle sensing equipment. Omni-directional data are provided for the detection of a foundation pit so that an expert can formulate a more perfect construction scheme, firstly, various data of a foundation pit fender pile are detected by utilizing the MEMS inclination angle sensing equipment, then the horizontal displacement is calculated through a pit support elastic fulcrum method, finally, the data are transmitted to a center transmission terminal and a server in sequence, so that unmanned, automatic, real-time and whole-course intelligent monitoring is completed.

Description

technical field [0001] The invention relates to the technical field of foundation pit monitoring, in particular to an intelligent foundation pit monitoring method and monitoring system based on mems sensors. Background technique [0002] With the continuous development of my country's economy and society, the number of domestic deep foundation pit projects is increasing, and the excavation depth of foundation pit construction is getting deeper and deeper. From shallow foundation pits to the current deep foundation pits, it can reach more than 20 meters , due to the complexity of rock and soil, including factors such as genesis, groundwater, building environment, and changes in underground facilities, it poses great challenges to foundation pit displacement monitoring. [0003] With the development of computer technology, the future monitoring system will inevitably develop in the direction of automation and intelligence, and use a variety of analysis software to perform rever...

AI Technical Summary

Problems solved by technology

[0007] 1. Heavy weight and bulky, inconvenient for transportation and storage;

[0008] 2. The measured vibration value is not accurate;

[0009] 3. Large power consumption, generally more than tens of watts;

[0010] 4. The key mechanical components of the vibration pickup are easily damaged, afraid of impact, afraid of collision, and difficult to carry and maintain;

[0011] 5. Inconvenient for data collection and processing

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