Steel structure health monitoring system based on movable wireless sensor

A steel structure and sensor technology, applied in signal transmission systems, instruments, measuring devices, etc., can solve the problems of high cost and difficulty in fully displaying the safety status of bridges, so as to improve efficiency, save labor maintenance costs, and ensure safety status Effect

Inactive Publication Date: 2014-05-14
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The most basic in the structural health system is the sensor and its data acquisition system. The widely used wired data acquisition method has the advantages of stable and reliable data acquisition, and is less affected by noise, but its tedious wiring work requires a lot of money. cost, and since the wired data acquisition nodes cannot be moved once they are deployed, it is impossible to ensure that all nodes are located in key monitoring areas, and it is difficult to fully display the safety status of the bridge during detection

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  • Steel structure health monitoring system based on movable wireless sensor
  • Steel structure health monitoring system based on movable wireless sensor
  • Steel structure health monitoring system based on movable wireless sensor

Examples

Experimental program
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Embodiment approach 1

[0016] Embodiment 1: The mobile robot is the key technology of the present invention, and it is mainly divided into two parts, namely mechanical structure design and electronic system design. In terms of mechanical structure, it mainly focuses on improving the stability, safety and reliability of the robot. Proceeding from actual needs, the robot of the present invention must be lightweight, high-strength, and the adsorption force must be large enough. According to the above requirements, the main body material of the robot is mainly aluminum alloy. At the same time, in the structural design, try to reduce the amount of materials used under the premise of ensuring the strength, so as to achieve the purpose of light weight. The weight of the car body: 2.5kg. The mechanical structure of the present invention is mainly divided into two parts, a car body driven by four wheels and a multi-degree-of-freedom mechanical arm. The four-wheel drive body structure is made of 2A12 high-st...

Embodiment approach 2

[0021] Embodiment 2: Here is an example of using the technology to carry out the vibration test of the structure, a 16-story steel frame experimental model, which uses the technology of the present invention to carry out the vibration test.

[0022]The mobile robot carries a wireless acceleration sensor and climbs on the surface of the structure. Under remote control, the wireless acceleration sensor is placed on the node of the second layer of the frame. Test the acceleration response of structural vibration. Under the impulse load excitation, the measured acceleration vibration response data are as follows: image 3 shown. After measuring the second layer, the robot picks up the sensor and continues to move the fourth and sixth layers. The measured acceleration response data are as follows: Figure 4 , Figure 5 shown. By repeating in sequence, the structural vibration response data of all floors can be realized. By adopting the technology of the invention, a single sens...

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Abstract

The invention relates to a steel structure health monitoring system based on a movable wireless sensor. The system comprises a computer terminal, a movable robot, a robot controller, a wireless acceleration sensor, and a sensor data reception base station. The computer terminal is connected with the sensor data reception base station and the robot controller. The movable robot performs wireless remote control through the robot controller. A manipulator on the movable robot places the wireless acceleration sensor in a position on the steel structure, wherein the position is required to be tested. After the data is collected, the movable robot picks up the wireless acceleration sensor, and continuously performs a test of the next tested point. The tested data of the wireless sensor is wirelessly transmitted to the data reception base station. With the system of the present invention, crack visualization, corrosion detection and distributed vibration, and temperature data acquisition of the steel structure can be achieved, and the artificial maintenance cost can be saved; with the system of the present invention, the structure position that the manual operation is difficult to reach can be reached so as to substantially increase daily detection efficiency on engineering structure.

Description

technical field [0001] The invention relates to the field of steel structure health monitoring, in particular to a steel structure health monitoring system based on a movable wireless sensor. Background technique [0002] With the rapid development of the world's economy, remarkable achievements have been made in the field of civil engineering, and various large and complex structures continue to appear. Today's civil engineering structures are developing in the direction of oversized and complex, such as large bridges, super high-rise buildings, huge stadiums and theaters, large dams, nuclear power plants and offshore structures. However, the design service life of such major engineering structures is as long as decades or even hundreds of years. Under the joint action of environmental erosion, material aging, long-term effects of loads, fatigue effects and other disaster factors, it will inevitably lead to structural damage. Accumulation and resistance attenuation may cau...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/88G01H17/00G08C17/02
Inventor 李惠鲍跃全朱晓铖吴峰
Owner HARBIN INST OF TECH
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