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Method and system for expanding structural health monitoring range

A health monitoring and range technology, which is applied in the direction of using sound waves/ultrasonic waves/infrasonic waves to analyze solids, instruments, and analysis materials, etc., and can solve problems such as the inability to expand the monitoring range of the SHM system

Active Publication Date: 2018-11-27
BROADSENS CORP JIAXING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and system for expanding the scope of structural health monitoring, so as to solve the existing problem that the monitoring scope of the SHM system cannot be expanded without adding additional actuators and sensors, or without upgrading the memory capacity

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  • Method and system for expanding structural health monitoring range
  • Method and system for expanding structural health monitoring range
  • Method and system for expanding structural health monitoring range

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Experimental program
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Embodiment 1

[0027] Embodiment 1 of the present invention provides a schematic flowchart of a method for expanding the scope of structural health monitoring. Specific as figure 1 As shown, the method may include: performing multiple scans on the detected structure. During each scan, when the excitation signal is transmitted to the structure, the collection of the response signal can begin after the signal reaches the transmitted structure. It is also possible to collect the response signal after the stimulus is absorbed and transmitted to the structure according to the preset collection delay after setting the corresponding preset collection delay. The specific details are as follows:

[0028] Step 110, transmitting an excitation signal to the structure.

[0029] Step 120, each time it is detected that the excitation signal is transmitted to the structure, collect the response signal after the excitation signal is transmitted to the structure according to a preset collection delay.

[...

Embodiment 2

[0054] On the basis of Embodiment 1, it is considered that as the monitoring range expands, the excitation signal travels farther, and the reflected excitation signal may experience more energy loss. The gain can be adjusted to compensate for the loss and enhance the reflected structure response signal. For example, a different gain can be preset for each scan. In addition, the SHM system can be arranged to automatically adjust the signal gain according to the characteristics of the signal.

[0055] Specifically, after step 120, it may further include: step 150, adopting different gain compensations for the response signal, so as to increase the strength of the effective signal.

[0056] The specific process includes: comparing the absolute maximum value of the amplitude of the response signal with the maximum value and minimum value of the preset value range;

[0057] When the absolute maximum value of the amplitude of the response signal is smaller than the minimum value, ...

Embodiment 3

[0069] Although, in the above-mentioned embodiments of the present invention, an actuator and a sensor are taken as an example for illustration. However, it does not mean that the present application can only be applied to a system with only one actuator and one sensor as an example. Certainly, if the memory of the system is sufficient, one or more actuators, or one or more sensors may also be provided. Specific embodiments are as follows, on the basis of any of the above embodiments, this embodiment will introduce the situation that the system includes one or more actuators, or includes one or more sensors. The actuator and the sensor can be integrated as in the above embodiment, or can be separated.

[0070] The principle of increasing the detection range of the SHM system will be described using one or more disconnected actuators and sensors. It should be noted that the pulse-echo mode is applicable to the above-mentioned embodiments and the embodiments described below. ...

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Abstract

The invention discloses a method and system for expanding structural health monitoring range. The method includes: performing multiple scans on the detected structure, wherein each scan comprises: transmitting an excitation signal to the structure; during every time of detecting that the excitation signal is transmitted to the structure, according to preset collection delay, collecting the responding signals after the excitation signal is transmitted to the structure, and analyzing the state of the structure to obtain the analysis result according to each collected responding signal; adding all the analysis results to obtain the finish detection result. The method and system achieves broadened monitoring range on the structure without increase of numbers of sensors and actuators and upgrade of capacity of a memory.

Description

technical field [0001] The invention relates to the technical field of big data processing, in particular to a method and system for expanding the scope of structural health monitoring. Background technique [0002] The Structural Health Monitoring (SHM) system involves the damage detection and characteristic analysis process of engineering structures. Damage may include changes in the material and / or geometric properties of the structural system, as well as changes in boundary conditions and system connectivity that can adversely affect the performance of the structural system. The monitoring process can include continuous observation of the system using a sensor array, and periodic sampling of dynamic response measurements, extraction of damage-sensitive features from these measurements, and statistical analysis of these features to determine the real-time health status of the system. [0003] Currently, SHM systems include a data collection device and at least one proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
CPCG01N29/04G01N2291/023
Inventor 张昶刘磊
Owner BROADSENS CORP JIAXING
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