Structure life pointer monitoring system

A monitoring system and life-span technology, applied in the cross-fields, can solve the problems of inability to provide real-time online information on the remaining life of the structure under load, lack of equipment or systems, etc., to achieve the effect of light weight and small size

Active Publication Date: 2006-07-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

Although some large-scale structures (such as power stations, bridges, pipelines, etc.) can be monitored in real time, there is still a lack of equipment or systems that can conveniently and truly reflect the fatigue life of structures, and cannot provide real-time online information on the loading conditions of structures and their remaining life

Method used

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  • Structure life pointer monitoring system
  • Structure life pointer monitoring system
  • Structure life pointer monitoring system

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Embodiment Construction

[0015] figure 1 It is the principle block diagram of the structural life indicator monitoring system. The system uses a digital signal processor (DSP) as a microprocessor, which can be connected to three strain gauges that work in the form of a single-arm bridge, that is, three structural surface strain sensors and three front ends of the bridge form three electric circuits. Bridge, the weak signals output by the three bridges pass through the amplifier and filter circuit to form three channels and enter the analog-to-digital conversion respectively, and then input the DSP after being converted into a digital signal, which is processed and analyzed by the DSP, and can be passed through the CAN interface of the field bus Transfer data externally.

[0016] The circuit diagram of the fieldbus interface is as follows: figure 2 shown. As a field bus widely used, CAN bus is used to form a monitoring network. When used in large structures, it is easy and convenient to form a lif...

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Abstract

The pointer monitor system for structure lifetime comprises: an electric bridge with a strain sensor fixed on structure surface and a bridge nose, an instrument amplifier, a lowpass filter, an ADC, a DSP, and field bus interface. Wherein, amplifying and filtering the output signal from bridge to send to the ADC convert into digital signal; analyzing real time the residual lifetime by the lifetime analysis algorithm in DSP to transmit by the field bus to a control node or control computer. This invention can be built as the distributed network structure, has small volume and convenient to use.

Description

1. Technical field [0001] The invention relates to a unit module used for life monitoring and indication of a mechanical structure, which belongs to the intersecting field of mechanical design, engineering mechanics, test and measurement technology, industrial communication and the like. 2. Background technology [0002] For large structures such as aircraft and ships, the complexity of the service environment and the variability of the load history often lead to sudden failure of the structure and sudden accidents. The safety of structures has always been a common concern and research issue in engineering circles. Structural strength design is usually used to ensure the safe use of the structure, and the data relied on for the design comes from tests conducted in the laboratory using simple samples. Since the difference between the laboratory load and the actual service load is not fully considered, it is difficult to accurately determine the life of the structure during t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00G01N27/00G01M19/00G01M99/00
Inventor 郭万林冯谦
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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