Bridge deflection measurement system and method based on laser projection

The automated measurement of bridge deflection using a laser projection system solves the problem of existing methods requiring multiple people to work together, and achieves efficient and accurate single-person measurement and real-time data uploading.

CN116026539BActive Publication Date: 2026-07-03NORTHEAST FORESTRY UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHEAST FORESTRY UNIV
Filing Date
2022-12-21
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing methods for measuring bridge deflection require multiple people to work together, the measurement process is cumbersome and inefficient, and the measurement accuracy is related to the skill level of the personnel, resulting in high costs.

Method used

A bridge deflection measurement system based on laser projection is adopted, which includes an angle tilting stage, a stepper motor, a laser automatic leveling device, a tracking device, a laser spot recognition device, and a host computer. Data is transmitted wirelessly to achieve automated measurement.

Benefits of technology

It enables a single person to complete bridge deflection measurement, improving measurement efficiency, ensuring measurement accuracy, and allowing measurement results to be uploaded in real time, saving manpower and resources.

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Abstract

A bridge deflection measurement system and method based on laser projection, belonging to the field of bridge measurement technology, is disclosed. This invention addresses the problem of efficient bridge deflection measurement. An angle tilting stage is connected to a stepper motor, which in turn connects to a laser automatic leveling and tracking device. The laser signal emitted by the automatic leveling and tracking device is projected onto a laser target. Data transmission between the automatic leveling and tracking device, the laser spot recognition device, and the host computer is conducted wirelessly. The automatic leveling and tracking device emits a horizontal laser beam and projects it onto the target in the laser spot recognition device. The spot recognition device follows the movement of the measurement point and identifies the spot using a camera. As the deflection of the measurement point varies, the deflection value is measured by the change in the relative position of the spot on the target between the measurement standard point and each measurement point. The automatic leveling and tracking device achieves automatic tracking and leveling of the laser beam on the laser target.
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