Automatic deep horizontal displacement measurement device and measurement method

By using IoT sensing technology and a miniaturized measuring device controlled by a motor, high-precision and stability monitoring of the deep horizontal displacement of the foundation pit retaining structure is achieved, solving the problems of heavy monitoring tasks and large errors in existing technologies, and making it suitable for safe construction of deep foundation pit projects.

WO2026137569A1PCT designated stage Publication Date: 2026-07-02SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
Filing Date
2025-02-21
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Existing methods for monitoring deep horizontal displacement of foundation pit retaining structures suffer from problems such as heavy manual monitoring workload, large data errors, high installation difficulty, and large measurement errors. In particular, the sensor errors and installation difficulties of automated inclinometer equipment lead to inaccurate monitoring.

Method used

A miniaturized measuring device is designed using IoT sensing technology. A motor controls the data acquisition module to move up and down inside the inclinometer hole. A dual-axis sensor chip is installed to achieve bidirectional synchronous data testing. Combined with a control method of multiple self-calibration, the measurement accuracy and stability are improved.

Benefits of technology

It improves the accuracy and stability of deep horizontal displacement monitoring, reduces installation difficulty, and enhances the timeliness and accuracy of data, making it suitable for safe construction in deep foundation pit projects.

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Abstract

The present invention relates to an automatic deep horizontal displacement measurement device and measurement method. The device comprises a motion control module, a data acquisition module, and an intelligent terminal, wherein the motion control module is fixedly mounted at an opening of an inclinometer hole and is connected to the data acquisition module by means of a steel wire rope, the data acquisition module moves up and down inside the inclinometer hole under the drive of the motion control module, the data acquisition module performs data acquisition during the up-and-down movement, and the intelligent terminal and the data acquisition module establish a data connection to complete data exchange. The present invention has the advantages of small size and high integration, and the entire device can be installed within the inclinometer hole, which greatly improves the on-site installation efficiency and reduces the difficulty in protecting the hole opening; variation data at different depths is acquired in real time, so that the impact of errors such as zero drift of sensors and long-term movement offset can be effectively eliminated; and multiple self-checking processes in the measurement method greatly enhance the accuracy and reliability of measurement data.
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