Automatic test system for actual stress of a bridge based on DIC technology

US11802808B2 · kind B2 · utility

Assignees

• JSTI Group · CN
• NANJING TECH UNIVERSITY · CN

Inventors

• Duo Liu · Dortmund, DE
• Jiandong Zhang · Sunnyvale, US
• Hui Xiong · Beijing, CN
• Xiaonan FENG · 安丰镇, CN
• Xianqiang Wang · 安丰镇, CN
• Jun Lu · Beijing, CN

Key dates

• Filing date: Jun 24, 2020
• Grant date: Oct 31, 2023
• Expiry date: Jun 24, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01M11/081
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present disclosure provides an automatic test system for actual stress of a bridge based on DIC technology, where the system includes a camera, a phosphor spraying device, a computer, and a sliding rail; the sliding rail is arranged on both sides of an upper wing of a box-shaped concrete beam; the phosphor spraying device is used to spray phosphor on a web of the box-shaped concrete beam to form speckles of varying light and shade; the camera is slidably connected to the sliding rail through a bracket, and is used to photograph the speckles and transmit a speckle image to the computer; and the computer is used to analyze and process the speckle image taken by the camera and generate a time history diagram of stress.